systemd: merge branch systemd into master

68 files changed, 2088 insertions, 1505 deletions

diff --git a/Makefile.am b/Makefile.am
index 68f4f0a28e..6b0812b6aa 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1541,9 +1541,14 @@ src_libsystemd_nm_la_SOURCES = \
 	src/systemd/sd-adapt/locale-util.h \
 	src/systemd/sd-adapt/memfd-util.h \
 	src/systemd/sd-adapt/missing.h \
+	src/systemd/sd-adapt/missing_socket.h \
+	src/systemd/sd-adapt/missing_syscall.h \
+	src/systemd/sd-adapt/missing_timerfd.h \
+	src/systemd/sd-adapt/missing_type.h \
 	src/systemd/sd-adapt/mkdir.h \
 	src/systemd/sd-adapt/procfs-util.h \
 	src/systemd/sd-adapt/raw-clone.h \
+	src/systemd/sd-adapt/rlimit-util.h \
 	src/systemd/sd-adapt/sd-daemon.h \
 	src/systemd/sd-adapt/sd-device.h \
 	src/systemd/sd-adapt/serialize.h \
@@ -1555,6 +1560,8 @@ src_libsystemd_nm_la_SOURCES = \
 	src/systemd/src/basic/alloc-util.c \
 	src/systemd/src/basic/alloc-util.h \
 	src/systemd/src/basic/async.h \
+	src/systemd/src/basic/env-file.c \
+	src/systemd/src/basic/env-file.h \
 	src/systemd/src/basic/env-util.c \
 	src/systemd/src/basic/env-util.h \
 	src/systemd/src/basic/escape.c \
@@ -1614,6 +1621,8 @@ src_libsystemd_nm_la_SOURCES = \
 	src/systemd/src/basic/strv.h \
 	src/systemd/src/basic/time-util.c \
 	src/systemd/src/basic/time-util.h \
+	src/systemd/src/basic/tmpfile-util.c \
+	src/systemd/src/basic/tmpfile-util.h \
 	src/systemd/src/basic/umask-util.h \
 	src/systemd/src/basic/utf8.c \
 	src/systemd/src/basic/utf8.h \
diff --git a/src/systemd/meson.build b/src/systemd/meson.build
index ee9912bcfa..adeeb6800b 100644
--- a/src/systemd/meson.build
+++ b/src/systemd/meson.build
@@ -2,6 +2,7 @@ sources = files(
   'sd-adapt/nm-sd-adapt.c',
   'src/basic/alloc-util.c',
   'src/basic/escape.c',
+  'src/basic/env-file.c',
   'src/basic/env-util.c',
   'src/basic/ether-addr-util.c',
   'src/basic/extract-word.c',
@@ -26,6 +27,7 @@ sources = files(
   'src/basic/string-util.c',
   'src/basic/strv.c',
   'src/basic/time-util.c',
+  'src/basic/tmpfile-util.c',
   'src/basic/utf8.c',
   'src/basic/util.c',
   'src/libsystemd-network/arp-util.c',
diff --git a/src/systemd/sd-adapt/dirent-util.h b/src/systemd/sd-adapt/dirent-util.h
index 637892c2d6..7132dfcc51 100644
--- a/src/systemd/sd-adapt/dirent-util.h
+++ b/src/systemd/sd-adapt/dirent-util.h
@@ -1,3 +1,5 @@
 #pragma once
 
 /* dummy header */
+
+#include "path-util.h"
diff --git a/src/systemd/sd-adapt/missing_socket.h b/src/systemd/sd-adapt/missing_socket.h
new file mode 100644
index 0000000000..637892c2d6
--- /dev/null
+++ b/src/systemd/sd-adapt/missing_socket.h
@@ -0,0 +1,3 @@
+#pragma once
+
+/* dummy header */
diff --git a/src/systemd/sd-adapt/missing_syscall.h b/src/systemd/sd-adapt/missing_syscall.h
new file mode 100644
index 0000000000..637892c2d6
--- /dev/null
+++ b/src/systemd/sd-adapt/missing_syscall.h
@@ -0,0 +1,3 @@
+#pragma once
+
+/* dummy header */
diff --git a/src/systemd/sd-adapt/missing_timerfd.h b/src/systemd/sd-adapt/missing_timerfd.h
new file mode 100644
index 0000000000..637892c2d6
--- /dev/null
+++ b/src/systemd/sd-adapt/missing_timerfd.h
@@ -0,0 +1,3 @@
+#pragma once
+
+/* dummy header */
diff --git a/src/systemd/sd-adapt/missing_type.h b/src/systemd/sd-adapt/missing_type.h
new file mode 100644
index 0000000000..637892c2d6
--- /dev/null
+++ b/src/systemd/sd-adapt/missing_type.h
@@ -0,0 +1,3 @@
+#pragma once
+
+/* dummy header */
diff --git a/src/systemd/sd-adapt/rlimit-util.h b/src/systemd/sd-adapt/rlimit-util.h
new file mode 100644
index 0000000000..637892c2d6
--- /dev/null
+++ b/src/systemd/sd-adapt/rlimit-util.h
@@ -0,0 +1,3 @@
+#pragma once
+
+/* dummy header */
diff --git a/src/systemd/src/basic/alloc-util.c b/src/systemd/src/basic/alloc-util.c
index ef40509833..2e1c7ef61e 100644
--- a/src/systemd/src/basic/alloc-util.c
+++ b/src/systemd/src/basic/alloc-util.c
@@ -14,7 +14,7 @@ void* memdup(const void *p, size_t l) {
 
         assert(l == 0 || p);
 
-        ret = malloc(l);
+        ret = malloc(l ?: 1);
         if (!ret)
                 return NULL;
 
diff --git a/src/systemd/src/basic/alloc-util.h b/src/systemd/src/basic/alloc-util.h
index 2a6deb12ca..ff7a46793a 100644
--- a/src/systemd/src/basic/alloc-util.h
+++ b/src/systemd/src/basic/alloc-util.h
@@ -8,9 +8,11 @@
 
 #include "macro.h"
 
+typedef void (*free_func_t)(void *p);
+
 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
 
-#define new0(t, n) ((t*) calloc((n), sizeof(t)))
+#define new0(t, n) ((t*) calloc((n) ?: 1, sizeof(t)))
 
 #define newa(t, n)                                              \
         ({                                                      \
@@ -75,7 +77,7 @@ _malloc_  _alloc_(1, 2) static inline void *malloc_multiply(size_t size, size_t
         if (size_multiply_overflow(size, need))
                 return NULL;
 
-        return malloc(size * need);
+        return malloc(size * need ?: 1);
 }
 
 #if !HAVE_REALLOCARRAY
@@ -83,7 +85,7 @@ _alloc_(2, 3) static inline void *reallocarray(void *p, size_t need, size_t size
         if (size_multiply_overflow(size, need))
                 return NULL;
 
-        return realloc(p, size * need);
+        return realloc(p, size * need ?: 1);
 }
 #endif
 
diff --git a/src/systemd/src/basic/env-file.c b/src/systemd/src/basic/env-file.c
new file mode 100644
index 0000000000..40051c312e
--- /dev/null
+++ b/src/systemd/src/basic/env-file.c
@@ -0,0 +1,578 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include "nm-sd-adapt.h"
+
+#include <stdio_ext.h>
+
+#include "alloc-util.h"
+#include "env-file.h"
+#include "env-util.h"
+#include "escape.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "fs-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "tmpfile-util.h"
+#include "utf8.h"
+
+static int parse_env_file_internal(
+                FILE *f,
+                const char *fname,
+                int (*push) (const char *filename, unsigned line,
+                             const char *key, char *value, void *userdata, int *n_pushed),
+                void *userdata,
+                int *n_pushed) {
+
+        size_t key_alloc = 0, n_key = 0, value_alloc = 0, n_value = 0, last_value_whitespace = (size_t) -1, last_key_whitespace = (size_t) -1;
+        _cleanup_free_ char *contents = NULL, *key = NULL, *value = NULL;
+        unsigned line = 1;
+        char *p;
+        int r;
+
+        enum {
+                PRE_KEY,
+                KEY,
+                PRE_VALUE,
+                VALUE,
+                VALUE_ESCAPE,
+                SINGLE_QUOTE_VALUE,
+                SINGLE_QUOTE_VALUE_ESCAPE,
+                DOUBLE_QUOTE_VALUE,
+                DOUBLE_QUOTE_VALUE_ESCAPE,
+                COMMENT,
+                COMMENT_ESCAPE
+        } state = PRE_KEY;
+
+        if (f)
+                r = read_full_stream(f, &contents, NULL);
+        else
+                r = read_full_file(fname, &contents, NULL);
+        if (r < 0)
+                return r;
+
+        for (p = contents; *p; p++) {
+                char c = *p;
+
+                switch (state) {
+
+                case PRE_KEY:
+                        if (strchr(COMMENTS, c))
+                                state = COMMENT;
+                        else if (!strchr(WHITESPACE, c)) {
+                                state = KEY;
+                                last_key_whitespace = (size_t) -1;
+
+                                if (!GREEDY_REALLOC(key, key_alloc, n_key+2))
+                                        return -ENOMEM;
+
+                                key[n_key++] = c;
+                        }
+                        break;
+
+                case KEY:
+                        if (strchr(NEWLINE, c)) {
+                                state = PRE_KEY;
+                                line++;
+                                n_key = 0;
+                        } else if (c == '=') {
+                                state = PRE_VALUE;
+                                last_value_whitespace = (size_t) -1;
+                        } else {
+                                if (!strchr(WHITESPACE, c))
+                                        last_key_whitespace = (size_t) -1;
+                                else if (last_key_whitespace == (size_t) -1)
+                                         last_key_whitespace = n_key;
+
+                                if (!GREEDY_REALLOC(key, key_alloc, n_key+2))
+                                        return -ENOMEM;
+
+                                key[n_key++] = c;
+                        }
+
+                        break;
+
+                case PRE_VALUE:
+                        if (strchr(NEWLINE, c)) {
+                                state = PRE_KEY;
+                                line++;
+                                key[n_key] = 0;
+
+                                if (value)
+                                        value[n_value] = 0;
+
+                                /* strip trailing whitespace from key */
+                                if (last_key_whitespace != (size_t) -1)
+                                        key[last_key_whitespace] = 0;
+
+                                r = push(fname, line, key, value, userdata, n_pushed);
+                                if (r < 0)
+                                        return r;
+
+                                n_key = 0;
+                                value = NULL;
+                                value_alloc = n_value = 0;
+
+                        } else if (c == '\'')
+                                state = SINGLE_QUOTE_VALUE;
+                        else if (c == '\"')
+                                state = DOUBLE_QUOTE_VALUE;
+                        else if (c == '\\')
+                                state = VALUE_ESCAPE;
+                        else if (!strchr(WHITESPACE, c)) {
+                                state = VALUE;
+
+                                if (!GREEDY_REALLOC(value, value_alloc, n_value+2))
+                                        return  -ENOMEM;
+
+                                value[n_value++] = c;
+                        }
+
+                        break;
+
+                case VALUE:
+                        if (strchr(NEWLINE, c)) {
+                                state = PRE_KEY;
+                                line++;
+
+                                key[n_key] = 0;
+
+                                if (value)
+                                        value[n_value] = 0;
+
+                                /* Chomp off trailing whitespace from value */
+                                if (last_value_whitespace != (size_t) -1)
+                                        value[last_value_whitespace] = 0;
+
+                                /* strip trailing whitespace from key */
+                                if (last_key_whitespace != (size_t) -1)
+                                        key[last_key_whitespace] = 0;
+
+                                r = push(fname, line, key, value, userdata, n_pushed);
+                                if (r < 0)
+                                        return r;
+
+                                n_key = 0;
+                                value = NULL;
+                                value_alloc = n_value = 0;
+
+                        } else if (c == '\\') {
+                                state = VALUE_ESCAPE;
+                                last_value_whitespace = (size_t) -1;
+                        } else {
+                                if (!strchr(WHITESPACE, c))
+                                        last_value_whitespace = (size_t) -1;
+                                else if (last_value_whitespace == (size_t) -1)
+                                        last_value_whitespace = n_value;
+
+                                if (!GREEDY_REALLOC(value, value_alloc, n_value+2))
+                                        return -ENOMEM;
+
+                                value[n_value++] = c;
+                        }
+
+                        break;
+
+                case VALUE_ESCAPE:
+                        state = VALUE;
+
+                        if (!strchr(NEWLINE, c)) {
+                                /* Escaped newlines we eat up entirely */
+                                if (!GREEDY_REALLOC(value, value_alloc, n_value+2))
+                                        return -ENOMEM;
+
+                                value[n_value++] = c;
+                        }
+                        break;
+
+                case SINGLE_QUOTE_VALUE:
+                        if (c == '\'')
+                                state = PRE_VALUE;
+                        else if (c == '\\')
+                                state = SINGLE_QUOTE_VALUE_ESCAPE;
+                        else {
+                                if (!GREEDY_REALLOC(value, value_alloc, n_value+2))
+                                        return -ENOMEM;
+
+                                value[n_value++] = c;
+                        }
+
+                        break;
+
+                case SINGLE_QUOTE_VALUE_ESCAPE:
+                        state = SINGLE_QUOTE_VALUE;
+
+                        if (!strchr(NEWLINE, c)) {
+                                if (!GREEDY_REALLOC(value, value_alloc, n_value+2))
+                                        return -ENOMEM;
+
+                                value[n_value++] = c;
+                        }
+                        break;
+
+                case DOUBLE_QUOTE_VALUE:
+                        if (c == '\"')
+                                state = PRE_VALUE;
+                        else if (c == '\\')
+                                state = DOUBLE_QUOTE_VALUE_ESCAPE;
+                        else {
+                                if (!GREEDY_REALLOC(value, value_alloc, n_value+2))
+                                        return -ENOMEM;
+
+                                value[n_value++] = c;
+                        }
+
+                        break;
+
+                case DOUBLE_QUOTE_VALUE_ESCAPE:
+                        state = DOUBLE_QUOTE_VALUE;
+
+                        if (!strchr(NEWLINE, c)) {
+                                if (!GREEDY_REALLOC(value, value_alloc, n_value+2))
+                                        return -ENOMEM;
+
+                                value[n_value++] = c;
+                        }
+                        break;
+
+                case COMMENT:
+                        if (c == '\\')
+                                state = COMMENT_ESCAPE;
+                        else if (strchr(NEWLINE, c)) {
+                                state = PRE_KEY;
+                                line++;
+                        }
+                        break;
+
+                case COMMENT_ESCAPE:
+                        state = COMMENT;
+                        break;
+                }
+        }
+
+        if (IN_SET(state,
+                   PRE_VALUE,
+                   VALUE,
+                   VALUE_ESCAPE,
+                   SINGLE_QUOTE_VALUE,
+                   SINGLE_QUOTE_VALUE_ESCAPE,
+                   DOUBLE_QUOTE_VALUE,
+                   DOUBLE_QUOTE_VALUE_ESCAPE)) {
+
+                key[n_key] = 0;
+
+                if (value)
+                        value[n_value] = 0;
+
+                if (state == VALUE)
+                        if (last_value_whitespace != (size_t) -1)
+                                value[last_value_whitespace] = 0;
+
+                /* strip trailing whitespace from key */
+                if (last_key_whitespace != (size_t) -1)
+                        key[last_key_whitespace] = 0;
+
+                r = push(fname, line, key, value, userdata, n_pushed);
+                if (r < 0)
+                        return r;
+
+                value = NULL;
+        }
+
+        return 0;
+}
+
+static int check_utf8ness_and_warn(
+                const char *filename, unsigned line,
+                const char *key, char *value) {
+
+        if (!utf8_is_valid(key)) {
+                _cleanup_free_ char *p = NULL;
+
+                p = utf8_escape_invalid(key);
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+                                       "%s:%u: invalid UTF-8 in key '%s', ignoring.",
+                                       strna(filename), line, p);
+        }
+
+        if (value && !utf8_is_valid(value)) {
+                _cleanup_free_ char *p = NULL;
+
+                p = utf8_escape_invalid(value);
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+                                       "%s:%u: invalid UTF-8 value for key %s: '%s', ignoring.",
+                                       strna(filename), line, key, p);
+        }
+
+        return 0;
+}
+
+static int parse_env_file_push(
+                const char *filename, unsigned line,
+                const char *key, char *value,
+                void *userdata,
+                int *n_pushed) {
+
+        const char *k;
+        va_list aq, *ap = userdata;
+        int r;
+
+        r = check_utf8ness_and_warn(filename, line, key, value);
+        if (r < 0)
+                return r;
+
+        va_copy(aq, *ap);
+
+        while ((k = va_arg(aq, const char *))) {
+                char **v;
+
+                v = va_arg(aq, char **);
+
+                if (streq(key, k)) {
+                        va_end(aq);
+                        free(*v);
+                        *v = value;
+
+                        if (n_pushed)
+                                (*n_pushed)++;
+
+                        return 1;
+                }
+        }
+
+        va_end(aq);
+        free(value);
+
+        return 0;
+}
+
+int parse_env_filev(
+                FILE *f,
+                const char *fname,
+                va_list ap) {
+
+        int r, n_pushed = 0;
+        va_list aq;
+
+        va_copy(aq, ap);
+        r = parse_env_file_internal(f, fname, parse_env_file_push, &aq, &n_pushed);
+        va_end(aq);
+        if (r < 0)
+                return r;
+
+        return n_pushed;
+}
+
+int parse_env_file_sentinel(
+                FILE *f,
+                const char *fname,
+                ...) {
+
+        va_list ap;
+        int r;
+
+        va_start(ap, fname);
+        r = parse_env_filev(f, fname, ap);
+        va_end(ap);
+
+        return r;
+}
+
+#if 0 /* NM_IGNORED */
+static int load_env_file_push(
+                const char *filename, unsigned line,
+                const char *key, char *value,
+                void *userdata,
+                int *n_pushed) {
+        char ***m = userdata;
+        char *p;
+        int r;
+
+        r = check_utf8ness_and_warn(filename, line, key, value);
+        if (r < 0)
+                return r;
+
+        p = strjoin(key, "=", value);
+        if (!p)
+                return -ENOMEM;
+
+        r = strv_env_replace(m, p);
+        if (r < 0) {
+                free(p);
+                return r;
+        }
+
+        if (n_pushed)
+                (*n_pushed)++;
+
+        free(value);
+        return 0;
+}
+
+int load_env_file(FILE *f, const char *fname, char ***rl) {
+        char **m = NULL;
+        int r;
+
+        r = parse_env_file_internal(f, fname, load_env_file_push, &m, NULL);
+        if (r < 0) {
+                strv_free(m);
+                return r;
+        }
+
+        *rl = m;
+        return 0;
+}
+
+static int load_env_file_push_pairs(
+                const char *filename, unsigned line,
+                const char *key, char *value,
+                void *userdata,
+                int *n_pushed) {
+        char ***m = userdata;
+        int r;
+
+        r = check_utf8ness_and_warn(filename, line, key, value);
+        if (r < 0)
+                return r;
+
+        r = strv_extend(m, key);
+        if (r < 0)
+                return -ENOMEM;
+
+        if (!value) {
+                r = strv_extend(m, "");
+                if (r < 0)
+                        return -ENOMEM;
+        } else {
+                r = strv_push(m, value);
+                if (r < 0)
+                        return r;
+        }
+
+        if (n_pushed)
+                (*n_pushed)++;
+
+        return 0;
+}
+
+int load_env_file_pairs(FILE *f, const char *fname, char ***rl) {
+        char **m = NULL;
+        int r;
+
+        r = parse_env_file_internal(f, fname, load_env_file_push_pairs, &m, NULL);
+        if (r < 0) {
+                strv_free(m);
+                return r;
+        }
+
+        *rl = m;
+        return 0;
+}
+
+static int merge_env_file_push(
+                const char *filename, unsigned line,
+                const char *key, char *value,
+                void *userdata,
+                int *n_pushed) {
+
+        char ***env = userdata;
+        char *expanded_value;
+
+        assert(env);
+
+        if (!value) {
+                log_error("%s:%u: invalid syntax (around \"%s\"), ignoring.", strna(filename), line, key);
+                return 0;
+        }
+
+        if (!env_name_is_valid(key)) {
+                log_error("%s:%u: invalid variable name \"%s\", ignoring.", strna(filename), line, key);
+                free(value);
+                return 0;
+        }
+
+        expanded_value = replace_env(value, *env,
+                                     REPLACE_ENV_USE_ENVIRONMENT|
+                                     REPLACE_ENV_ALLOW_BRACELESS|
+                                     REPLACE_ENV_ALLOW_EXTENDED);
+        if (!expanded_value)
+                return -ENOMEM;
+
+        free_and_replace(value, expanded_value);
+
+        return load_env_file_push(filename, line, key, value, env, n_pushed);
+}
+
+int merge_env_file(
+                char ***env,
+                FILE *f,
+                const char *fname) {
+
+        /* NOTE: this function supports braceful and braceless variable expansions,
+         * plus "extended" substitutions, unlike other exported parsing functions.
+         */
+
+        return parse_env_file_internal(f, fname, merge_env_file_push, env, NULL);
+}
+
+static void write_env_var(FILE *f, const char *v) {
+        const char *p;
+
+        p = strchr(v, '=');
+        if (!p) {
+                /* Fallback */
+                fputs_unlocked(v, f);
+                fputc_unlocked('\n', f);
+                return;
+        }
+
+        p++;
+        fwrite_unlocked(v, 1, p-v, f);
+
+        if (string_has_cc(p, NULL) || chars_intersect(p, WHITESPACE SHELL_NEED_QUOTES)) {
+                fputc_unlocked('\"', f);
+
+                for (; *p; p++) {
+                        if (strchr(SHELL_NEED_ESCAPE, *p))
+                                fputc_unlocked('\\', f);
+
+                        fputc_unlocked(*p, f);
+                }
+
+                fputc_unlocked('\"', f);
+        } else
+                fputs_unlocked(p, f);
+
+        fputc_unlocked('\n', f);
+}
+
+int write_env_file(const char *fname, char **l) {
+        _cleanup_fclose_ FILE *f = NULL;
+        _cleanup_free_ char *p = NULL;
+        char **i;
+        int r;
+
+        assert(fname);
+
+        r = fopen_temporary(fname, &f, &p);
+        if (r < 0)
+                return r;
+
+        (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
+        (void) fchmod_umask(fileno(f), 0644);
+
+        STRV_FOREACH(i, l)
+                write_env_var(f, *i);
+
+        r = fflush_and_check(f);
+        if (r >= 0) {
+                if (rename(p, fname) >= 0)
+                        return 0;
+
+                r = -errno;
+        }
+
+        unlink(p);
+        return r;
+}
+#endif /* NM_IGNORED */
diff --git a/src/systemd/src/basic/env-file.h b/src/systemd/src/basic/env-file.h
new file mode 100644
index 0000000000..e1ca195ff0
--- /dev/null
+++ b/src/systemd/src/basic/env-file.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+#pragma once
+
+#include <stdarg.h>
+#include <stdio.h>
+
+#include "macro.h"
+
+int parse_env_filev(FILE *f, const char *fname, va_list ap);
+int parse_env_file_sentinel(FILE *f, const char *fname, ...) _sentinel_;
+#define parse_env_file(f, fname, ...) parse_env_file_sentinel(f, fname, __VA_ARGS__, NULL)
+int load_env_file(FILE *f, const char *fname, char ***l);
+int load_env_file_pairs(FILE *f, const char *fname, char ***l);
+
+int merge_env_file(char ***env, FILE *f, const char *fname);
+
+int write_env_file(const char *fname, char **l);
diff --git a/src/systemd/src/basic/escape.h b/src/systemd/src/basic/escape.h
index c612a7c02d..cc6a897c49 100644
--- a/src/systemd/src/basic/escape.h
+++ b/src/systemd/src/basic/escape.h
@@ -10,7 +10,7 @@
 #endif /* NM_IGNORED */
 
 #include "string-util.h"
-#include "missing.h"
+#include "missing_type.h"
 
 /* What characters are special in the shell? */
 /* must be escaped outside and inside double-quotes */
diff --git a/src/systemd/src/basic/ether-addr-util.c b/src/systemd/src/basic/ether-addr-util.c
index ed92bc609c..602bbae059 100644
--- a/src/systemd/src/basic/ether-addr-util.c
+++ b/src/systemd/src/basic/ether-addr-util.c
@@ -30,21 +30,15 @@ char* ether_addr_to_string(const struct ether_addr *addr, char buffer[ETHER_ADDR
         return buffer;
 }
 
-int ether_addr_compare(const void *a, const void *b) {
-        assert(a);
-        assert(b);
-
+int ether_addr_compare(const struct ether_addr *a, const struct ether_addr *b) {
         return memcmp(a, b, ETH_ALEN);
 }
 
-static void ether_addr_hash_func(const void *p, struct siphash *state) {
+static void ether_addr_hash_func(const struct ether_addr *p, struct siphash *state) {
         siphash24_compress(p, sizeof(struct ether_addr), state);
 }
 
-const struct hash_ops ether_addr_hash_ops = {
-        .hash = ether_addr_hash_func,
-        .compare = ether_addr_compare
-};
+DEFINE_HASH_OPS(ether_addr_hash_ops, struct ether_addr, ether_addr_hash_func, ether_addr_compare);
 
 int ether_addr_from_string(const char *s, struct ether_addr *ret) {
         size_t pos = 0, n, field;
diff --git a/src/systemd/src/basic/ether-addr-util.h b/src/systemd/src/basic/ether-addr-util.h
index 3be0370049..4e44b30be9 100644
--- a/src/systemd/src/basic/ether-addr-util.h
+++ b/src/systemd/src/basic/ether-addr-util.h
@@ -12,7 +12,7 @@
 #define ETHER_ADDR_TO_STRING_MAX (3*6)
 char* ether_addr_to_string(const struct ether_addr *addr, char buffer[ETHER_ADDR_TO_STRING_MAX]);
 
-int ether_addr_compare(const void *a, const void *b);
+int ether_addr_compare(const struct ether_addr *a, const struct ether_addr *b);
 static inline bool ether_addr_equal(const struct ether_addr *a, const struct ether_addr *b) {
         return ether_addr_compare(a, b) == 0;
 }
diff --git a/src/systemd/src/basic/fd-util.c b/src/systemd/src/basic/fd-util.c
index 6c6068038a..a242b739cd 100644
--- a/src/systemd/src/basic/fd-util.c
+++ b/src/systemd/src/basic/fd-util.c
@@ -25,6 +25,7 @@
 #include "socket-util.h"
 #include "stdio-util.h"
 #include "util.h"
+#include "tmpfile-util.h"
 
 int close_nointr(int fd) {
         assert(fd >= 0);
@@ -115,7 +116,7 @@ FILE* safe_fclose(FILE *f) {
         if (f) {
                 PROTECT_ERRNO;
 
-                assert_se(fclose_nointr(f) != EBADF);
+                assert_se(fclose_nointr(f) != -EBADF);
         }
 
         return NULL;
@@ -653,7 +654,7 @@ int fd_duplicate_data_fd(int fd) {
 
                         if ((size_t) isz >= DATA_FD_MEMORY_LIMIT) {
 
-                                r = copy_bytes_full(fd, pipefds[1], DATA_FD_MEMORY_LIMIT, 0, &remains, &remains_size);
+                                r = copy_bytes_full(fd, pipefds[1], DATA_FD_MEMORY_LIMIT, 0, &remains, &remains_size, NULL, NULL);
                                 if (r < 0 && r != -EAGAIN)
                                         return r; /* If we get EAGAIN it could be because of the source or because of
                                                    * the destination fd, we can't know, as sendfile() and friends won't
diff --git a/src/systemd/src/basic/fileio.c b/src/systemd/src/basic/fileio.c
index d9794403a1..93b8b2439b 100644
--- a/src/systemd/src/basic/fileio.c
+++ b/src/systemd/src/basic/fileio.c
@@ -2,6 +2,7 @@
 
 #include "nm-sd-adapt.h"
 
+#include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
@@ -10,32 +11,22 @@
 #include <stdio_ext.h>
 #include <stdlib.h>
 #include <string.h>
-#include <sys/mman.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
 
 #include "alloc-util.h"
-#include "ctype.h"
-#include "env-util.h"
-#include "escape.h"
 #include "fd-util.h"
 #include "fileio.h"
 #include "fs-util.h"
-#include "hexdecoct.h"
 #include "log.h"
 #include "macro.h"
 #include "missing.h"
 #include "parse-util.h"
 #include "path-util.h"
-#include "process-util.h"
-#include "random-util.h"
 #include "stdio-util.h"
 #include "string-util.h"
-#include "strv.h"
-#include "time-util.h"
-#include "umask-util.h"
-#include "utf8.h"
+#include "tmpfile-util.h"
 
 #define READ_FULL_BYTES_MAX (4U*1024U*1024U)
 
@@ -168,7 +159,7 @@ int write_string_file_ts(
                         goto fail;
                 }
 
-                f = fdopen(fd, "we");
+                f = fdopen(fd, "w");
                 if (!f) {
                         r = -errno;
                         safe_close(fd);
@@ -279,16 +270,20 @@ int verify_file(const char *fn, const char *blob, bool accept_extra_nl) {
 }
 #endif /* NM_IGNORED */
 
-int read_full_stream(FILE *f, char **contents, size_t *size) {
+int read_full_stream(
+                FILE *f,
+                char **ret_contents,
+                size_t *ret_size) {
+
         _cleanup_free_ char *buf = NULL;
         struct stat st;
         size_t n, l;
         int fd;
 
         assert(f);
-        assert(contents);
+        assert(ret_contents);
 
-        n = LINE_MAX;
+        n = LINE_MAX; /* Start size */
 
         fd = fileno(f);
         if (fd >= 0) { /* If the FILE* object is backed by an fd (as opposed to memory or such, see fmemopen(), let's
@@ -344,11 +339,20 @@ int read_full_stream(FILE *f, char **contents, size_t *size) {
                 n = MIN(n * 2, READ_FULL_BYTES_MAX);
         }
 
+        if (!ret_size) {
+                /* Safety check: if the caller doesn't want to know the size of what we just read it will rely on the
+                 * trailing NUL byte. But if there's an embedded NUL byte, then we should refuse operation as otherwise
+                 * there'd be ambiguity about what we just read. */
+
+                if (memchr(buf, 0, l))
+                        return -EBADMSG;
+        }
+
         buf[l] = 0;
-        *contents = TAKE_PTR(buf);
+        *ret_contents = TAKE_PTR(buf);
 
-        if (size)
-                *size = l;
+        if (ret_size)
+                *ret_size = l;
 
         return 0;
 }
@@ -368,566 +372,7 @@ int read_full_file(const char *fn, char **contents, size_t *size) {
         return read_full_stream(f, contents, size);
 }
 
-static int parse_env_file_internal(
-                FILE *f,
-                const char *fname,
-                int (*push) (const char *filename, unsigned line,
-                             const char *key, char *value, void *userdata, int *n_pushed),
-                void *userdata,
-                int *n_pushed) {
-
-        size_t key_alloc = 0, n_key = 0, value_alloc = 0, n_value = 0, last_value_whitespace = (size_t) -1, last_key_whitespace = (size_t) -1;
-        _cleanup_free_ char *contents = NULL, *key = NULL, *value = NULL;
-        unsigned line = 1;
-        char *p;
-        int r;
-
-        enum {
-                PRE_KEY,
-                KEY,
-                PRE_VALUE,
-                VALUE,
-                VALUE_ESCAPE,
-                SINGLE_QUOTE_VALUE,
-                SINGLE_QUOTE_VALUE_ESCAPE,
-                DOUBLE_QUOTE_VALUE,
-                DOUBLE_QUOTE_VALUE_ESCAPE,
-                COMMENT,
-                COMMENT_ESCAPE
-        } state = PRE_KEY;
-
-        if (f)
-                r = read_full_stream(f, &contents, NULL);
-        else
-                r = read_full_file(fname, &contents, NULL);
-        if (r < 0)
-                return r;
-
-        for (p = contents; *p; p++) {
-                char c = *p;
-
-                switch (state) {
-
-                case PRE_KEY:
-                        if (strchr(COMMENTS, c))
-                                state = COMMENT;
-                        else if (!strchr(WHITESPACE, c)) {
-                                state = KEY;
-                                last_key_whitespace = (size_t) -1;
-
-                                if (!GREEDY_REALLOC(key, key_alloc, n_key+2))
-                                        return -ENOMEM;
-
-                                key[n_key++] = c;
-                        }
-                        break;
-
-                case KEY:
-                        if (strchr(NEWLINE, c)) {
-                                state = PRE_KEY;
-                                line++;
-                                n_key = 0;
-                        } else if (c == '=') {
-                                state = PRE_VALUE;
-                                last_value_whitespace = (size_t) -1;
-                        } else {
-                                if (!strchr(WHITESPACE, c))
-                                        last_key_whitespace = (size_t) -1;
-                                else if (last_key_whitespace == (size_t) -1)
-                                         last_key_whitespace = n_key;
-
-                                if (!GREEDY_REALLOC(key, key_alloc, n_key+2))
-                                        return -ENOMEM;
-
-                                key[n_key++] = c;
-                        }
-
-                        break;
-
-                case PRE_VALUE:
-                        if (strchr(NEWLINE, c)) {
-                                state = PRE_KEY;
-                                line++;
-                                key[n_key] = 0;
-
-                                if (value)
-                                        value[n_value] = 0;
-
-                                /* strip trailing whitespace from key */
-                                if (last_key_whitespace != (size_t) -1)
-                                        key[last_key_whitespace] = 0;
-
-                                r = push(fname, line, key, value, userdata, n_pushed);
-                                if (r < 0)
-                                        return r;
-
-                                n_key = 0;
-                                value = NULL;
-                                value_alloc = n_value = 0;
-
-                        } else if (c == '\'')
-                                state = SINGLE_QUOTE_VALUE;
-                        else if (c == '\"')
-                                state = DOUBLE_QUOTE_VALUE;
-                        else if (c == '\\')
-                                state = VALUE_ESCAPE;
-                        else if (!strchr(WHITESPACE, c)) {
-                                state = VALUE;
-
-                                if (!GREEDY_REALLOC(value, value_alloc, n_value+2))
-                                        return  -ENOMEM;
-
-                                value[n_value++] = c;
-                        }
-
-                        break;
-
-                case VALUE:
-                        if (strchr(NEWLINE, c)) {
-                                state = PRE_KEY;
-                                line++;
-
-                                key[n_key] = 0;
-
-                                if (value)
-                                        value[n_value] = 0;
-
-                                /* Chomp off trailing whitespace from value */
-                                if (last_value_whitespace != (size_t) -1)
-                                        value[last_value_whitespace] = 0;
-
-                                /* strip trailing whitespace from key */
-                                if (last_key_whitespace != (size_t) -1)
-                                        key[last_key_whitespace] = 0;
-
-                                r = push(fname, line, key, value, userdata, n_pushed);
-                                if (r < 0)
-                                        return r;
-
-                                n_key = 0;
-                                value = NULL;
-                                value_alloc = n_value = 0;
-
-                        } else if (c == '\\') {
-                                state = VALUE_ESCAPE;
-                                last_value_whitespace = (size_t) -1;
-                        } else {
-                                if (!strchr(WHITESPACE, c))
-                                        last_value_whitespace = (size_t) -1;
-                                else if (last_value_whitespace == (size_t) -1)
-                                        last_value_whitespace = n_value;
-
-                                if (!GREEDY_REALLOC(value, value_alloc, n_value+2))
-                                        return -ENOMEM;
-
-                                value[n_value++] = c;
-                        }
-
-                        break;
-
-                case VALUE_ESCAPE:
-                        state = VALUE;
-
-                        if (!strchr(NEWLINE, c)) {
-                                /* Escaped newlines we eat up entirely */
-                                if (!GREEDY_REALLOC(value, value_alloc, n_value+2))
-                                        return -ENOMEM;
-
-                                value[n_value++] = c;
-                        }
-                        break;
-
-                case SINGLE_QUOTE_VALUE:
-                        if (c == '\'')
-                                state = PRE_VALUE;
-                        else if (c == '\\')
-                                state = SINGLE_QUOTE_VALUE_ESCAPE;
-                        else {
-                                if (!GREEDY_REALLOC(value, value_alloc, n_value+2))
-                                        return -ENOMEM;
-
-                                value[n_value++] = c;
-                        }
-
-                        break;
-
-                case SINGLE_QUOTE_VALUE_ESCAPE:
-                        state = SINGLE_QUOTE_VALUE;
-
-                        if (!strchr(NEWLINE, c)) {
-                                if (!GREEDY_REALLOC(value, value_alloc, n_value+2))
-                                        return -ENOMEM;
-
-                                value[n_value++] = c;
-                        }
-                        break;
-
-                case DOUBLE_QUOTE_VALUE:
-                        if (c == '\"')
-                                state = PRE_VALUE;
-                        else if (c == '\\')
-                                state = DOUBLE_QUOTE_VALUE_ESCAPE;
-                        else {
-                                if (!GREEDY_REALLOC(value, value_alloc, n_value+2))
-                                        return -ENOMEM;
-
-                                value[n_value++] = c;
-                        }
-
-                        break;
-
-                case DOUBLE_QUOTE_VALUE_ESCAPE:
-                        state = DOUBLE_QUOTE_VALUE;
-
-                        if (!strchr(NEWLINE, c)) {
-                                if (!GREEDY_REALLOC(value, value_alloc, n_value+2))
-                                        return -ENOMEM;
-
-                                value[n_value++] = c;
-                        }
-                        break;
-
-                case COMMENT:
-                        if (c == '\\')
-                                state = COMMENT_ESCAPE;
-                        else if (strchr(NEWLINE, c)) {
-                                state = PRE_KEY;
-                                line++;
-                        }
-                        break;
-
-                case COMMENT_ESCAPE:
-                        state = COMMENT;
-                        break;
-                }
-        }
-
-        if (IN_SET(state,
-                   PRE_VALUE,
-                   VALUE,
-                   VALUE_ESCAPE,
-                   SINGLE_QUOTE_VALUE,
-                   SINGLE_QUOTE_VALUE_ESCAPE,
-                   DOUBLE_QUOTE_VALUE,
-                   DOUBLE_QUOTE_VALUE_ESCAPE)) {
-
-                key[n_key] = 0;
-
-                if (value)
-                        value[n_value] = 0;
-
-                if (state == VALUE)
-                        if (last_value_whitespace != (size_t) -1)
-                                value[last_value_whitespace] = 0;
-
-                /* strip trailing whitespace from key */
-                if (last_key_whitespace != (size_t) -1)
-                        key[last_key_whitespace] = 0;
-
-                r = push(fname, line, key, value, userdata, n_pushed);
-                if (r < 0)
-                        return r;
-
-                value = NULL;
-        }
-
-        return 0;
-}
-
-static int check_utf8ness_and_warn(
-                const char *filename, unsigned line,
-                const char *key, char *value) {
-
-        if (!utf8_is_valid(key)) {
-                _cleanup_free_ char *p = NULL;
-
-                p = utf8_escape_invalid(key);
-                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
-                                       "%s:%u: invalid UTF-8 in key '%s', ignoring.",
-                                       strna(filename), line, p);
-        }
-
-        if (value && !utf8_is_valid(value)) {
-                _cleanup_free_ char *p = NULL;
-
-                p = utf8_escape_invalid(value);
-                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
-                                       "%s:%u: invalid UTF-8 value for key %s: '%s', ignoring.",
-                                       strna(filename), line, key, p);
-        }
-
-        return 0;
-}
-
-static int parse_env_file_push(
-                const char *filename, unsigned line,
-                const char *key, char *value,
-                void *userdata,
-                int *n_pushed) {
-
-        const char *k;
-        va_list aq, *ap = userdata;
-        int r;
-
-        r = check_utf8ness_and_warn(filename, line, key, value);
-        if (r < 0)
-                return r;
-
-        va_copy(aq, *ap);
-
-        while ((k = va_arg(aq, const char *))) {
-                char **v;
-
-                v = va_arg(aq, char **);
-
-                if (streq(key, k)) {
-                        va_end(aq);
-                        free(*v);
-                        *v = value;
-
-                        if (n_pushed)
-                                (*n_pushed)++;
-
-                        return 1;
-                }
-        }
-
-        va_end(aq);
-        free(value);
-
-        return 0;
-}
-
-int parse_env_filev(
-                FILE *f,
-                const char *fname,
-                va_list ap) {
-
-        int r, n_pushed = 0;
-        va_list aq;
-
-        va_copy(aq, ap);
-        r = parse_env_file_internal(f, fname, parse_env_file_push, &aq, &n_pushed);
-        va_end(aq);
-        if (r < 0)
-                return r;
-
-        return n_pushed;
-}
-
-int parse_env_file_sentinel(
-                FILE *f,
-                const char *fname,
-                ...) {
-
-        va_list ap;
-        int r;
-
-        va_start(ap, fname);
-        r = parse_env_filev(f, fname, ap);
-        va_end(ap);
-
-        return r;
-}
-
 #if 0 /* NM_IGNORED */
-static int load_env_file_push(
-                const char *filename, unsigned line,
-                const char *key, char *value,
-                void *userdata,
-                int *n_pushed) {
-        char ***m = userdata;
-        char *p;
-        int r;
-
-        r = check_utf8ness_and_warn(filename, line, key, value);
-        if (r < 0)
-                return r;
-
-        p = strjoin(key, "=", value);
-        if (!p)
-                return -ENOMEM;
-
-        r = strv_env_replace(m, p);
-        if (r < 0) {
-                free(p);
-                return r;
-        }
-
-        if (n_pushed)
-                (*n_pushed)++;
-
-        free(value);
-        return 0;
-}
-
-int load_env_file(FILE *f, const char *fname, char ***rl) {
-        char **m = NULL;
-        int r;
-
-        r = parse_env_file_internal(f, fname, load_env_file_push, &m, NULL);
-        if (r < 0) {
-                strv_free(m);
-                return r;
-        }
-
-        *rl = m;
-        return 0;
-}
-
-static int load_env_file_push_pairs(
-                const char *filename, unsigned line,
-                const char *key, char *value,
-                void *userdata,
-                int *n_pushed) {
-        char ***m = userdata;
-        int r;
-
-        r = check_utf8ness_and_warn(filename, line, key, value);
-        if (r < 0)
-                return r;
-
-        r = strv_extend(m, key);
-        if (r < 0)
-                return -ENOMEM;
-
-        if (!value) {
-                r = strv_extend(m, "");
-                if (r < 0)
-                        return -ENOMEM;
-        } else {
-                r = strv_push(m, value);
-                if (r < 0)
-                        return r;
-        }
-
-        if (n_pushed)
-                (*n_pushed)++;
-
-        return 0;
-}
-
-int load_env_file_pairs(FILE *f, const char *fname, char ***rl) {
-        char **m = NULL;
-        int r;
-
-        r = parse_env_file_internal(f, fname, load_env_file_push_pairs, &m, NULL);
-        if (r < 0) {
-                strv_free(m);
-                return r;
-        }
-
-        *rl = m;
-        return 0;
-}
-
-static int merge_env_file_push(
-                const char *filename, unsigned line,
-                const char *key, char *value,
-                void *userdata,
-                int *n_pushed) {
-
-        char ***env = userdata;
-        char *expanded_value;
-
-        assert(env);
-
-        if (!value) {
-                log_error("%s:%u: invalid syntax (around \"%s\"), ignoring.", strna(filename), line, key);
-                return 0;
-        }
-
-        if (!env_name_is_valid(key)) {
-                log_error("%s:%u: invalid variable name \"%s\", ignoring.", strna(filename), line, key);
-                free(value);
-                return 0;
-        }
-
-        expanded_value = replace_env(value, *env,
-                                     REPLACE_ENV_USE_ENVIRONMENT|
-                                     REPLACE_ENV_ALLOW_BRACELESS|
-                                     REPLACE_ENV_ALLOW_EXTENDED);
-        if (!expanded_value)
-                return -ENOMEM;
-
-        free_and_replace(value, expanded_value);
-
-        return load_env_file_push(filename, line, key, value, env, n_pushed);
-}
-
-int merge_env_file(
-                char ***env,
-                FILE *f,
-                const char *fname) {
-
-        /* NOTE: this function supports braceful and braceless variable expansions,
-         * plus "extended" substitutions, unlike other exported parsing functions.
-         */
-
-        return parse_env_file_internal(f, fname, merge_env_file_push, env, NULL);
-}
-
-static void write_env_var(FILE *f, const char *v) {
-        const char *p;
-
-        p = strchr(v, '=');
-        if (!p) {
-                /* Fallback */
-                fputs_unlocked(v, f);
-                fputc_unlocked('\n', f);
-                return;
-        }
-
-        p++;
-        fwrite_unlocked(v, 1, p-v, f);
-
-        if (string_has_cc(p, NULL) || chars_intersect(p, WHITESPACE SHELL_NEED_QUOTES)) {
-                fputc_unlocked('\"', f);
-
-                for (; *p; p++) {
-                        if (strchr(SHELL_NEED_ESCAPE, *p))
-                                fputc_unlocked('\\', f);
-
-                        fputc_unlocked(*p, f);
-                }
-
-                fputc_unlocked('\"', f);
-        } else
-                fputs_unlocked(p, f);
-
-        fputc_unlocked('\n', f);
-}
-
-int write_env_file(const char *fname, char **l) {
-        _cleanup_fclose_ FILE *f = NULL;
-        _cleanup_free_ char *p = NULL;
-        char **i;
-        int r;
-
-        assert(fname);
-
-        r = fopen_temporary(fname, &f, &p);
-        if (r < 0)
-                return r;
-
-        (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
-        (void) fchmod_umask(fileno(f), 0644);
-
-        STRV_FOREACH(i, l)
-                write_env_var(f, *i);
-
-        r = fflush_and_check(f);
-        if (r >= 0) {
-                if (rename(p, fname) >= 0)
-                        return 0;
-
-                r = -errno;
-        }
-
-        unlink(p);
-        return r;
-}
-
 int executable_is_script(const char *path, char **interpreter) {
         _cleanup_free_ char *line = NULL;
         size_t len;
@@ -1136,39 +581,6 @@ int search_and_fopen_nulstr(const char *path, const char *mode, const char *root
 }
 #endif /* NM_IGNORED */
 
-int fopen_temporary(const char *path, FILE **_f, char **_temp_path) {
-        FILE *f;
-        char *t;
-        int r, fd;
-
-        assert(path);
-        assert(_f);
-        assert(_temp_path);
-
-        r = tempfn_xxxxxx(path, NULL, &t);
-        if (r < 0)
-                return r;
-
-        fd = mkostemp_safe(t);
-        if (fd < 0) {
-                free(t);
-                return -errno;
-        }
-
-        f = fdopen(fd, "we");
-        if (!f) {
-                unlink_noerrno(t);
-                free(t);
-                safe_close(fd);
-                return -errno;
-        }
-
-        *_f = f;
-        *_temp_path = t;
-
-        return 0;
-}
-
 int fflush_and_check(FILE *f) {
         assert(f);
 
@@ -1200,165 +612,6 @@ int fflush_sync_and_check(FILE *f) {
 
         return 0;
 }
-#endif /* NM_IGNORED */
-
-/* This is much like mkostemp() but is subject to umask(). */
-int mkostemp_safe(char *pattern) {
-        _cleanup_umask_ mode_t u = 0;
-        int fd;
-
-        assert(pattern);
-
-        u = umask(077);
-
-        fd = mkostemp(pattern, O_CLOEXEC);
-        if (fd < 0)
-                return -errno;
-
-        return fd;
-}
-
-int fmkostemp_safe(char *pattern, const char *mode, FILE **ret_f) {
-        int fd;
-        FILE *f;
-
-        fd = mkostemp_safe(pattern);
-        if (fd < 0)
-                return fd;
-
-        f = fdopen(fd, mode);
-        if (!f) {
-                safe_close(fd);
-                return -errno;
-        }
-
-        *ret_f = f;
-        return 0;
-}
-
-int tempfn_xxxxxx(const char *p, const char *extra, char **ret) {
-        const char *fn;
-        char *t;
-
-        assert(ret);
-
-        if (isempty(p))
-                return -EINVAL;
-        if (path_equal(p, "/"))
-                return -EINVAL;
-
-        /*
-         * Turns this:
-         *         /foo/bar/waldo
-         *
-         * Into this:
-         *         /foo/bar/.#<extra>waldoXXXXXX
-         */
-
-        fn = basename(p);
-        if (!filename_is_valid(fn))
-                return -EINVAL;
-
-        extra = strempty(extra);
-
-        t = new(char, strlen(p) + 2 + strlen(extra) + 6 + 1);
-        if (!t)
-                return -ENOMEM;
-
-        strcpy(stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn), "XXXXXX");
-
-        *ret = path_simplify(t, false);
-        return 0;
-}
-
-#if 0 /* NM_IGNORED */
-int tempfn_random(const char *p, const char *extra, char **ret) {
-        const char *fn;
-        char *t, *x;
-        uint64_t u;
-        unsigned i;
-
-        assert(ret);
-
-        if (isempty(p))
-                return -EINVAL;
-        if (path_equal(p, "/"))
-                return -EINVAL;
-
-        /*
-         * Turns this:
-         *         /foo/bar/waldo
-         *
-         * Into this:
-         *         /foo/bar/.#<extra>waldobaa2a261115984a9
-         */
-
-        fn = basename(p);
-        if (!filename_is_valid(fn))
-                return -EINVAL;
-
-        extra = strempty(extra);
-
-        t = new(char, strlen(p) + 2 + strlen(extra) + 16 + 1);
-        if (!t)
-                return -ENOMEM;
-
-        x = stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn);
-
-        u = random_u64();
-        for (i = 0; i < 16; i++) {
-                *(x++) = hexchar(u & 0xF);
-                u >>= 4;
-        }
-
-        *x = 0;
-
-        *ret = path_simplify(t, false);
-        return 0;
-}
-
-int tempfn_random_child(const char *p, const char *extra, char **ret) {
-        char *t, *x;
-        uint64_t u;
-        unsigned i;
-        int r;
-
-        assert(ret);
-
-        /* Turns this:
-         *         /foo/bar/waldo
-         * Into this:
-         *         /foo/bar/waldo/.#<extra>3c2b6219aa75d7d0
-         */
-
-        if (!p) {
-                r = tmp_dir(&p);
-                if (r < 0)
-                        return r;
-        }
-
-        extra = strempty(extra);
-
-        t = new(char, strlen(p) + 3 + strlen(extra) + 16 + 1);
-        if (!t)
-                return -ENOMEM;
-
-        if (isempty(p))
-                x = stpcpy(stpcpy(t, ".#"), extra);
-        else
-                x = stpcpy(stpcpy(stpcpy(t, p), "/.#"), extra);
-
-        u = random_u64();
-        for (i = 0; i < 16; i++) {
-                *(x++) = hexchar(u & 0xF);
-                u >>= 4;
-        }
-
-        *x = 0;
-
-        *ret = path_simplify(t, false);
-        return 0;
-}
 
 int write_timestamp_file_atomic(const char *fn, usec_t n) {
         char ln[DECIMAL_STR_MAX(n)+2];
@@ -1425,198 +678,53 @@ int fputs_with_space(FILE *f, const char *s, const char *separator, bool *space)
 }
 
 #if 0 /* NM_IGNORED */
-int open_tmpfile_unlinkable(const char *directory, int flags) {
-        char *p;
-        int fd, r;
-
-        if (!directory) {
-                r = tmp_dir(&directory);
-                if (r < 0)
-                        return r;
-        } else if (isempty(directory))
-                return -EINVAL;
-
-        /* Returns an unlinked temporary file that cannot be linked into the file system anymore */
-
-        /* Try O_TMPFILE first, if it is supported */
-        fd = open(directory, flags|O_TMPFILE|O_EXCL, S_IRUSR|S_IWUSR);
-        if (fd >= 0)
-                return fd;
-
-        /* Fall back to unguessable name + unlinking */
-        p = strjoina(directory, "/systemd-tmp-XXXXXX");
-
-        fd = mkostemp_safe(p);
-        if (fd < 0)
-                return fd;
-
-        (void) unlink(p);
-
-        return fd;
-}
-
-int open_tmpfile_linkable(const char *target, int flags, char **ret_path) {
-        _cleanup_free_ char *tmp = NULL;
-        int r, fd;
-
-        assert(target);
-        assert(ret_path);
-
-        /* Don't allow O_EXCL, as that has a special meaning for O_TMPFILE */
-        assert((flags & O_EXCL) == 0);
-
-        /* Creates a temporary file, that shall be renamed to "target" later. If possible, this uses O_TMPFILE – in
-         * which case "ret_path" will be returned as NULL. If not possible a the tempoary path name used is returned in
-         * "ret_path". Use link_tmpfile() below to rename the result after writing the file in full. */
-
-        fd = open_parent(target, O_TMPFILE|flags, 0640);
-        if (fd >= 0) {
-                *ret_path = NULL;
-                return fd;
-        }
-
-        log_debug_errno(fd, "Failed to use O_TMPFILE for %s: %m", target);
-
-        r = tempfn_random(target, NULL, &tmp);
-        if (r < 0)
-                return r;
-
-        fd = open(tmp, O_CREAT|O_EXCL|O_NOFOLLOW|O_NOCTTY|flags, 0640);
-        if (fd < 0)
-                return -errno;
-
-        *ret_path = TAKE_PTR(tmp);
-
-        return fd;
-}
-
-int open_serialization_fd(const char *ident) {
-        int fd = -1;
-
-        fd = memfd_create(ident, MFD_CLOEXEC);
-        if (fd < 0) {
-                const char *path;
-
-                path = getpid_cached() == 1 ? "/run/systemd" : "/tmp";
-                fd = open_tmpfile_unlinkable(path, O_RDWR|O_CLOEXEC);
-                if (fd < 0)
-                        return fd;
-
-                log_debug("Serializing %s to %s.", ident, path);
-        } else
-                log_debug("Serializing %s to memfd.", ident);
-
-        return fd;
-}
-
-int link_tmpfile(int fd, const char *path, const char *target) {
-        int r;
-
-        assert(fd >= 0);
-        assert(target);
-
-        /* Moves a temporary file created with open_tmpfile() above into its final place. if "path" is NULL an fd
-         * created with O_TMPFILE is assumed, and linkat() is used. Otherwise it is assumed O_TMPFILE is not supported
-         * on the directory, and renameat2() is used instead.
-         *
-         * Note that in both cases we will not replace existing files. This is because linkat() does not support this
-         * operation currently (renameat2() does), and there is no nice way to emulate this. */
-
-        if (path) {
-                r = rename_noreplace(AT_FDCWD, path, AT_FDCWD, target);
-                if (r < 0)
-                        return r;
-        } else {
-                char proc_fd_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(fd) + 1];
-
-                xsprintf(proc_fd_path, "/proc/self/fd/%i", fd);
-
-                if (linkat(AT_FDCWD, proc_fd_path, AT_FDCWD, target, AT_SYMLINK_FOLLOW) < 0)
-                        return -errno;
-        }
-
-        return 0;
-}
-
-int read_nul_string(FILE *f, char **ret) {
-        _cleanup_free_ char *x = NULL;
-        size_t allocated = 0, n = 0;
-
-        assert(f);
-        assert(ret);
-
-        /* Reads a NUL-terminated string from the specified file. */
-
-        for (;;) {
-                int c;
-
-                if (!GREEDY_REALLOC(x, allocated, n+2))
-                        return -ENOMEM;
-
-                c = fgetc(f);
-                if (c == 0) /* Terminate at NUL byte */
-                        break;
-                if (c == EOF) {
-                        if (ferror(f))
-                                return -errno;
-                        break; /* Terminate at EOF */
-                }
+/* A bitmask of the EOL markers we know */
+typedef enum EndOfLineMarker {
+        EOL_NONE     = 0,
+        EOL_ZERO     = 1 << 0,  /* \0 (aka NUL) */
+        EOL_TEN      = 1 << 1,  /* \n (aka NL, aka LF)  */
+        EOL_THIRTEEN = 1 << 2,  /* \r (aka CR)  */
+} EndOfLineMarker;
 
-                x[n++] = (char) c;
-        }
+static EndOfLineMarker categorize_eol(char c, ReadLineFlags flags) {
 
-        if (x)
-                x[n] = 0;
-        else {
-                x = new0(char, 1);
-                if (!x)
-                        return -ENOMEM;
+        if (!IN_SET(flags, READ_LINE_ONLY_NUL)) {
+                if (c == '\n')
+                        return EOL_TEN;
+                if (c == '\r')
+                        return EOL_THIRTEEN;
         }
 
-        *ret = TAKE_PTR(x);
-
-        return 0;
-}
+        if (c == '\0')
+                return EOL_ZERO;
 
-int mkdtemp_malloc(const char *template, char **ret) {
-        _cleanup_free_ char *p = NULL;
-        int r;
-
-        assert(ret);
-
-        if (template)
-                p = strdup(template);
-        else {
-                const char *tmp;
-
-                r = tmp_dir(&tmp);
-                if (r < 0)
-                        return r;
-
-                p = strjoin(tmp, "/XXXXXX");
-        }
-        if (!p)
-                return -ENOMEM;
-
-        if (!mkdtemp(p))
-                return -errno;
-
-        *ret = TAKE_PTR(p);
-        return 0;
+        return EOL_NONE;
 }
 
 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, funlockfile);
 
-int read_line(FILE *f, size_t limit, char **ret) {
-        _cleanup_free_ char *buffer = NULL;
+int read_line_full(FILE *f, size_t limit, ReadLineFlags flags, char **ret) {
         size_t n = 0, allocated = 0, count = 0;
+        _cleanup_free_ char *buffer = NULL;
+        int r;
 
         assert(f);
 
         /* Something like a bounded version of getline().
          *
-         * Considers EOF, \n and \0 end of line delimiters, and does not include these delimiters in the string
-         * returned.
+         * Considers EOF, \n, \r and \0 end of line delimiters (or combinations of these), and does not include these
+         * delimiters in the string returned. Specifically, recognizes the following combinations of markers as line
+         * endings:
+         *
+         *     • \n        (UNIX)
+         *     • \r        (old MacOS)
+         *     • \0        (C strings)
+         *     • \n\0
+         *     • \r\0
+         *     • \r\n      (Windows)
+         *     • \n\r
+         *     • \r\n\0
+         *     • \n\r\0
          *
          * Returns the number of bytes read from the files (i.e. including delimiters — this hence usually differs from
          * the number of characters in the returned string). When EOF is hit, 0 is returned.
@@ -1633,34 +741,55 @@ int read_line(FILE *f, size_t limit, char **ret) {
 
         {
                 _unused_ _cleanup_(funlockfilep) FILE *flocked = f;
+                EndOfLineMarker previous_eol = EOL_NONE;
                 flockfile(f);
 
                 for (;;) {
-                        int c;
+                        EndOfLineMarker eol;
+                        char c;
 
                         if (n >= limit)
                                 return -ENOBUFS;
 
-                        errno = 0;
-                        c = fgetc_unlocked(f);
-                        if (c == EOF) {
-                                /* if we read an error, and have no data to return, then propagate the error */
-                                if (ferror_unlocked(f) && n == 0)
-                                        return errno > 0 ? -errno : -EIO;
+                        if (count >= INT_MAX) /* We couldn't return the counter anymore as "int", hence refuse this */
+                                return -ENOBUFS;
+
+                        r = safe_fgetc(f, &c);
+                        if (r < 0)
+                                return r;
+                        if (r == 0) /* EOF is definitely EOL */
+                                break;
 
+                        eol = categorize_eol(c, flags);
+
+                        if (FLAGS_SET(previous_eol, EOL_ZERO) ||
+                            (eol == EOL_NONE && previous_eol != EOL_NONE) ||
+                            (eol != EOL_NONE && (previous_eol & eol) != 0)) {
+                                /* Previous char was a NUL? This is not an EOL, but the previous char was? This type of
+                                 * EOL marker has been seen right before?  In either of these three cases we are
+                                 * done. But first, let's put this character back in the queue. (Note that we have to
+                                 * cast this to (unsigned char) here as ungetc() expects a positive 'int', and if we
+                                 * are on an architecture where 'char' equals 'signed char' we need to ensure we don't
+                                 * pass a negative value here. That said, to complicate things further ungetc() is
+                                 * actually happy with most negative characters and implicitly casts them back to
+                                 * positive ones as needed, except for \xff (aka -1, aka EOF), which it refuses. What a
+                                 * godawful API!) */
+                                assert_se(ungetc((unsigned char) c, f) != EOF);
                                 break;
                         }
 
                         count++;
 
-                        if (IN_SET(c, '\n', 0)) /* Reached a delimiter */
-                                break;
+                        if (eol != EOL_NONE) {
+                                previous_eol |= eol;
+                                continue;
+                        }
 
                         if (ret) {
                                 if (!GREEDY_REALLOC(buffer, allocated, n + 2))
                                         return -ENOMEM;
 
-                                buffer[n] = (char) c;
+                                buffer[n] = c;
                         }
 
                         n++;
@@ -1675,4 +804,31 @@ int read_line(FILE *f, size_t limit, char **ret) {
 
         return (int) count;
 }
+
+int safe_fgetc(FILE *f, char *ret) {
+        int k;
+
+        assert(f);
+
+        /* A safer version of plain fgetc(): let's propagate the error that happened while reading as such, and
+         * separate the EOF condition from the byte read, to avoid those confusion signed/unsigned issues fgetc()
+         * has. */
+
+        errno = 0;
+        k = fgetc(f);
+        if (k == EOF) {
+                if (ferror(f))
+                        return errno > 0 ? -errno : -EIO;
+
+                if (ret)
+                        *ret = 0;
+
+                return 0;
+        }
+
+        if (ret)
+                *ret = k;
+
+        return 1;
+}
 #endif /* NM_IGNORED */
diff --git a/src/systemd/src/basic/fileio.h b/src/systemd/src/basic/fileio.h
index dae115e3bb..53e3f4ef5f 100644
--- a/src/systemd/src/basic/fileio.h
+++ b/src/systemd/src/basic/fileio.h
@@ -44,16 +44,6 @@ int read_full_stream(FILE *f, char **contents, size_t *size);
 
 int verify_file(const char *fn, const char *blob, bool accept_extra_nl);
 
-int parse_env_filev(FILE *f, const char *fname, va_list ap);
-int parse_env_file_sentinel(FILE *f, const char *fname, ...) _sentinel_;
-#define parse_env_file(f, fname, ...) parse_env_file_sentinel(f, fname, __VA_ARGS__, NULL)
-int load_env_file(FILE *f, const char *fname, char ***l);
-int load_env_file_pairs(FILE *f, const char *fname, char ***l);
-
-int merge_env_file(char ***env, FILE *f, const char *fname);
-
-int write_env_file(const char *fname, char **l);
-
 int executable_is_script(const char *path, char **interpreter);
 
 int get_proc_field(const char *filename, const char *pattern, const char *terminator, char **field);
@@ -66,27 +56,23 @@ int search_and_fopen_nulstr(const char *path, const char *mode, const char *root
 int fflush_and_check(FILE *f);
 int fflush_sync_and_check(FILE *f);
 
-int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
-int mkostemp_safe(char *pattern);
-int fmkostemp_safe(char *pattern, const char *mode, FILE**_f);
-
-int tempfn_xxxxxx(const char *p, const char *extra, char **ret);
-int tempfn_random(const char *p, const char *extra, char **ret);
-int tempfn_random_child(const char *p, const char *extra, char **ret);
-
 int write_timestamp_file_atomic(const char *fn, usec_t n);
 int read_timestamp_file(const char *fn, usec_t *ret);
 
 int fputs_with_space(FILE *f, const char *s, const char *separator, bool *space);
 
-int open_tmpfile_unlinkable(const char *directory, int flags);
-int open_tmpfile_linkable(const char *target, int flags, char **ret_path);
-int open_serialization_fd(const char *ident);
+typedef enum ReadLineFlags {
+        READ_LINE_ONLY_NUL = 1 << 0,
+} ReadLineFlags;
 
-int link_tmpfile(int fd, const char *path, const char *target);
+int read_line_full(FILE *f, size_t limit, ReadLineFlags flags, char **ret);
 
-int read_nul_string(FILE *f, char **ret);
+static inline int read_line(FILE *f, size_t limit, char **ret) {
+        return read_line_full(f, limit, 0, ret);
+}
 
-int mkdtemp_malloc(const char *template, char **ret);
+static inline int read_nul_string(FILE *f, size_t limit, char **ret) {
+        return read_line_full(f, limit, READ_LINE_ONLY_NUL, ret);
+}
 
-int read_line(FILE *f, size_t limit, char **ret);
+int safe_fgetc(FILE *f, char *ret);
diff --git a/src/systemd/src/basic/fs-util.c b/src/systemd/src/basic/fs-util.c
index 5966c3835b..767e5e078f 100644
--- a/src/systemd/src/basic/fs-util.c
+++ b/src/systemd/src/basic/fs-util.c
@@ -15,8 +15,8 @@
 #include "alloc-util.h"
 #include "dirent-util.h"
 #include "fd-util.h"
-#include "fileio.h"
 #include "fs-util.h"
+#include "locale-util.h"
 #include "log.h"
 #include "macro.h"
 #include "missing.h"
@@ -29,6 +29,7 @@
 #include "string-util.h"
 #include "strv.h"
 #include "time-util.h"
+#include "tmpfile-util.h"
 #include "user-util.h"
 #include "util.h"
 
@@ -216,31 +217,62 @@ int readlink_and_make_absolute(const char *p, char **r) {
 }
 
 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) {
+        char fd_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int) + 1];
+        _cleanup_close_ int fd = -1;
         assert(path);
 
-        /* Under the assumption that we are running privileged we
-         * first change the access mode and only then hand out
+        /* Under the assumption that we are running privileged we first change the access mode and only then hand out
          * ownership to avoid a window where access is too open. */
 
-        if (mode != MODE_INVALID)
-                if (chmod(path, mode) < 0)
+        fd = open(path, O_PATH|O_CLOEXEC|O_NOFOLLOW); /* Let's acquire an O_PATH fd, as precaution to change mode/owner
+                                                       * on the same file */
+        if (fd < 0)
+                return -errno;
+
+        xsprintf(fd_path, "/proc/self/fd/%i", fd);
+
+        if (mode != MODE_INVALID) {
+
+                if ((mode & S_IFMT) != 0) {
+                        struct stat st;
+
+                        if (stat(fd_path, &st) < 0)
+                                return -errno;
+
+                        if ((mode & S_IFMT) != (st.st_mode & S_IFMT))
+                                return -EINVAL;
+                }
+
+                if (chmod(fd_path, mode & 07777) < 0)
                         return -errno;
+        }
 
         if (uid != UID_INVALID || gid != GID_INVALID)
-                if (chown(path, uid, gid) < 0)
+                if (chown(fd_path, uid, gid) < 0)
                         return -errno;
 
         return 0;
 }
 
 int fchmod_and_chown(int fd, mode_t mode, uid_t uid, gid_t gid) {
-        /* Under the assumption that we are running privileged we
-         * first change the access mode and only then hand out
+        /* Under the assumption that we are running privileged we first change the access mode and only then hand out
          * ownership to avoid a window where access is too open. */
 
-        if (mode != MODE_INVALID)
-                if (fchmod(fd, mode) < 0)
+        if (mode != MODE_INVALID) {
+
+                if ((mode & S_IFMT) != 0) {
+                        struct stat st;
+
+                        if (fstat(fd, &st) < 0)
+                                return -errno;
+
+                        if ((mode & S_IFMT) != (st.st_mode & S_IFMT))
+                                return -EINVAL;
+                }
+
+                if (fchmod(fd, mode & 0777) < 0)
                         return -errno;
+        }
 
         if (uid != UID_INVALID || gid != GID_INVALID)
                 if (fchown(fd, uid, gid) < 0)
@@ -270,7 +302,6 @@ int fchmod_opath(int fd, mode_t m) {
          * fchownat() does. */
 
         xsprintf(procfs_path, "/proc/self/fd/%i", fd);
-
         if (chmod(procfs_path, m) < 0)
                 return -errno;
 
@@ -642,15 +673,42 @@ int inotify_add_watch_fd(int fd, int what, uint32_t mask) {
 }
 
 #if 0 /* NM_IGNORED */
-static bool safe_transition(const struct stat *a, const struct stat *b) {
+static bool unsafe_transition(const struct stat *a, const struct stat *b) {
         /* Returns true if the transition from a to b is safe, i.e. that we never transition from unprivileged to
          * privileged files or directories. Why bother? So that unprivileged code can't symlink to privileged files
          * making us believe we read something safe even though it isn't safe in the specific context we open it in. */
 
         if (a->st_uid == 0) /* Transitioning from privileged to unprivileged is always fine */
-                return true;
+                return false;
+
+        return a->st_uid != b->st_uid; /* Otherwise we need to stay within the same UID */
+}
+
+static int log_unsafe_transition(int a, int b, const char *path, unsigned flags) {
+        _cleanup_free_ char *n1 = NULL, *n2 = NULL;
 
-        return a->st_uid == b->st_uid; /* Otherwise we need to stay within the same UID */
+        if (!FLAGS_SET(flags, CHASE_WARN))
+                return -ENOLINK;
+
+        (void) fd_get_path(a, &n1);
+        (void) fd_get_path(b, &n2);
+
+        return log_warning_errno(SYNTHETIC_ERRNO(ENOLINK),
+                                 "Detected unsafe path transition %s %s %s during canonicalization of %s.",
+                                 n1, special_glyph(SPECIAL_GLYPH_ARROW), n2, path);
+}
+
+static int log_autofs_mount_point(int fd, const char *path, unsigned flags) {
+        _cleanup_free_ char *n1 = NULL;
+
+        if (!FLAGS_SET(flags, CHASE_WARN))
+                return -EREMOTE;
+
+        (void) fd_get_path(fd, &n1);
+
+        return log_warning_errno(SYNTHETIC_ERRNO(EREMOTE),
+                                 "Detected autofs mount point %s during canonicalization of %s.",
+                                 n1, path);
 }
 
 int chase_symlinks(const char *path, const char *original_root, unsigned flags, char **ret) {
@@ -713,6 +771,14 @@ int chase_symlinks(const char *path, const char *original_root, unsigned flags,
          *    path is fully normalized, and == 0 for each normalization step. This may be combined with
          *    CHASE_NONEXISTENT, in which case 1 is returned when a component is not found.
          *
+         * 4. With CHASE_SAFE: in this case the path must not contain unsafe transitions, i.e. transitions from
+         *    unprivileged to privileged files or directories. In such cases the return value is -ENOLINK. If
+         *    CHASE_WARN is also set a warning describing the unsafe transition is emitted.
+         *
+         * 5. With CHASE_NO_AUTOFS: in this case if an autofs mount point is encountered, the path normalization is
+         *    aborted and -EREMOTE is returned. If CHASE_WARN is also set a warning showing the path of the mount point
+         *    is emitted.
+         *
          * */
 
         /* A root directory of "/" or "" is identical to none */
@@ -827,8 +893,8 @@ int chase_symlinks(const char *path, const char *original_root, unsigned flags,
                                 if (fstat(fd_parent, &st) < 0)
                                         return -errno;
 
-                                if (!safe_transition(&previous_stat, &st))
-                                        return -EPERM;
+                                if (unsafe_transition(&previous_stat, &st))
+                                        return log_unsafe_transition(fd, fd_parent, path, flags);
 
                                 previous_stat = st;
                         }
@@ -868,14 +934,14 @@ int chase_symlinks(const char *path, const char *original_root, unsigned flags,
                 if (fstat(child, &st) < 0)
                         return -errno;
                 if ((flags & CHASE_SAFE) &&
-                    !safe_transition(&previous_stat, &st))
-                        return -EPERM;
+                    unsafe_transition(&previous_stat, &st))
+                        return log_unsafe_transition(fd, child, path, flags);
 
                 previous_stat = st;
 
                 if ((flags & CHASE_NO_AUTOFS) &&
                     fd_is_fs_type(child, AUTOFS_SUPER_MAGIC) > 0)
-                        return -EREMOTE;
+                        return log_autofs_mount_point(child, path, flags);
 
                 if (S_ISLNK(st.st_mode) && !((flags & CHASE_NOFOLLOW) && isempty(todo))) {
                         char *joined;
@@ -907,8 +973,8 @@ int chase_symlinks(const char *path, const char *original_root, unsigned flags,
                                         if (fstat(fd, &st) < 0)
                                                 return -errno;
 
-                                        if (!safe_transition(&previous_stat, &st))
-                                                return -EPERM;
+                                        if (unsafe_transition(&previous_stat, &st))
+                                                return log_unsafe_transition(child, fd, path, flags);
 
                                         previous_stat = st;
                                 }
diff --git a/src/systemd/src/basic/fs-util.h b/src/systemd/src/basic/fs-util.h
index 955b146a6a..7ad030be5d 100644
--- a/src/systemd/src/basic/fs-util.h
+++ b/src/systemd/src/basic/fs-util.h
@@ -74,6 +74,7 @@ enum {
         CHASE_TRAIL_SLASH = 1 << 5, /* If set, any trailing slash will be preserved */
         CHASE_STEP        = 1 << 6, /* If set, just execute a single step of the normalization */
         CHASE_NOFOLLOW    = 1 << 7, /* Only valid with CHASE_OPEN: when the path's right-most component refers to symlink return O_PATH fd of the symlink, rather than following it. */
+        CHASE_WARN        = 1 << 8, /* Emit an appropriate warning when an error is encountered */
 };
 
 /* How many iterations to execute before returning -ELOOP */
diff --git a/src/systemd/src/basic/hash-funcs.c b/src/systemd/src/basic/hash-funcs.c
index fc2c4f7824..33264859ed 100644
--- a/src/systemd/src/basic/hash-funcs.c
+++ b/src/systemd/src/basic/hash-funcs.c
@@ -7,22 +7,14 @@
 #include "hash-funcs.h"
 #include "path-util.h"
 
-void string_hash_func(const void *p, struct siphash *state) {
+void string_hash_func(const char *p, struct siphash *state) {
         siphash24_compress(p, strlen(p) + 1, state);
 }
 
 #if 0 /* NM_IGNORED */
-int string_compare_func(const void *a, const void *b) {
-        return strcmp(a, b);
-}
-
-const struct hash_ops string_hash_ops = {
-        .hash = string_hash_func,
-        .compare = string_compare_func
-};
+DEFINE_HASH_OPS(string_hash_ops, char, string_hash_func, string_compare_func);
 
-void path_hash_func(const void *p, struct siphash *state) {
-        const char *q = p;
+void path_hash_func(const char *q, struct siphash *state) {
         size_t n;
 
         assert(q);
@@ -60,14 +52,11 @@ void path_hash_func(const void *p, struct siphash *state) {
         }
 }
 
-int path_compare_func(const void *a, const void *b) {
+int path_compare_func(const char *a, const char *b) {
         return path_compare(a, b);
 }
 
-const struct hash_ops path_hash_ops = {
-        .hash = path_hash_func,
-        .compare = path_compare_func
-};
+DEFINE_HASH_OPS(path_hash_ops, char, path_hash_func, path_compare_func);
 #endif /* NM_IGNORED */
 
 void trivial_hash_func(const void *p, struct siphash *state) {
@@ -80,41 +69,29 @@ int trivial_compare_func(const void *a, const void *b) {
 
 const struct hash_ops trivial_hash_ops = {
         .hash = trivial_hash_func,
-        .compare = trivial_compare_func
+        .compare = trivial_compare_func,
 };
 
-void uint64_hash_func(const void *p, struct siphash *state) {
+void uint64_hash_func(const uint64_t *p, struct siphash *state) {
         siphash24_compress(p, sizeof(uint64_t), state);
 }
 
-int uint64_compare_func(const void *_a, const void *_b) {
-        uint64_t a, b;
-        a = *(const uint64_t*) _a;
-        b = *(const uint64_t*) _b;
-        return CMP(a, b);
+int uint64_compare_func(const uint64_t *a, const uint64_t *b) {
+        return CMP(*a, *b);
 }
 
-const struct hash_ops uint64_hash_ops = {
-        .hash = uint64_hash_func,
-        .compare = uint64_compare_func
-};
+DEFINE_HASH_OPS(uint64_hash_ops, uint64_t, uint64_hash_func, uint64_compare_func);
 
 #if 0 /* NM_IGNORED */
 #if SIZEOF_DEV_T != 8
-void devt_hash_func(const void *p, struct siphash *state) {
+void devt_hash_func(const dev_t *p, struct siphash *state) {
         siphash24_compress(p, sizeof(dev_t), state);
 }
 
-int devt_compare_func(const void *_a, const void *_b) {
-        dev_t a, b;
-        a = *(const dev_t*) _a;
-        b = *(const dev_t*) _b;
-        return CMP(a, b);
+int devt_compare_func(const dev_t *a, const dev_t *b) {
+        return CMP(*a, *b);
 }
 
-const struct hash_ops devt_hash_ops = {
-        .hash = devt_hash_func,
-        .compare = devt_compare_func
-};
+DEFINE_HASH_OPS(devt_hash_ops, dev_t, devt_hash_func, devt_compare_func);
 #endif
 #endif /* NM_IGNORED */
diff --git a/src/systemd/src/basic/hash-funcs.h b/src/systemd/src/basic/hash-funcs.h
index fa45cfe256..3d2ae4b55e 100644
--- a/src/systemd/src/basic/hash-funcs.h
+++ b/src/systemd/src/basic/hash-funcs.h
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: LGPL-2.1+ */
 #pragma once
 
+#include "alloc-util.h"
 #include "macro.h"
 #include "siphash24.h"
 
@@ -10,14 +11,74 @@ typedef int (*compare_func_t)(const void *a, const void *b);
 struct hash_ops {
         hash_func_t hash;
         compare_func_t compare;
+        free_func_t free_key;
+        free_func_t free_value;
 };
 
-void string_hash_func(const void *p, struct siphash *state);
-int string_compare_func(const void *a, const void *b) _pure_;
+#define _DEFINE_HASH_OPS(uq, name, type, hash_func, compare_func, free_key_func, free_value_func, scope) \
+        _unused_ static void (* UNIQ_T(static_hash_wrapper, uq))(const type *, struct siphash *) = hash_func; \
+        _unused_ static int (* UNIQ_T(static_compare_wrapper, uq))(const type *, const type *) = compare_func; \
+        scope const struct hash_ops name = {                            \
+                .hash = (hash_func_t) hash_func,                        \
+                .compare = (compare_func_t) compare_func,               \
+                .free_key = free_key_func,                              \
+                .free_value = free_value_func,                          \
+        }
+
+#define _DEFINE_FREE_FUNC(uq, type, wrapper_name, func)                 \
+        /* Type-safe free function */                                   \
+        static void UNIQ_T(wrapper_name, uq)(void *a) {                 \
+                type *_a = a;                                           \
+                func(_a);                                               \
+        }
+
+#define _DEFINE_HASH_OPS_WITH_KEY_DESTRUCTOR(uq, name, type, hash_func, compare_func, free_func, scope) \
+        _DEFINE_FREE_FUNC(uq, type, static_free_wrapper, free_func);    \
+        _DEFINE_HASH_OPS(uq, name, type, hash_func, compare_func,       \
+                         UNIQ_T(static_free_wrapper, uq), NULL, scope)
+
+#define _DEFINE_HASH_OPS_WITH_VALUE_DESTRUCTOR(uq, name, type, hash_func, compare_func, type_value, free_func, scope) \
+        _DEFINE_FREE_FUNC(uq, type_value, static_free_wrapper, free_func); \
+        _DEFINE_HASH_OPS(uq, name, type, hash_func, compare_func,       \
+                         NULL, UNIQ_T(static_free_wrapper, uq), scope)
+
+#define _DEFINE_HASH_OPS_FULL(uq, name, type, hash_func, compare_func, free_key_func, type_value, free_value_func, scope) \
+        _DEFINE_FREE_FUNC(uq, type, static_free_key_wrapper, free_key_func); \
+        _DEFINE_FREE_FUNC(uq, type_value, static_free_value_wrapper, free_value_func); \
+        _DEFINE_HASH_OPS(uq, name, type, hash_func, compare_func,       \
+                         UNIQ_T(static_free_key_wrapper, uq),           \
+                         UNIQ_T(static_free_value_wrapper, uq), scope)
+
+#define DEFINE_HASH_OPS(name, type, hash_func, compare_func)            \
+        _DEFINE_HASH_OPS(UNIQ, name, type, hash_func, compare_func, NULL, NULL,)
+
+#define DEFINE_PRIVATE_HASH_OPS(name, type, hash_func, compare_func)    \
+        _DEFINE_HASH_OPS(UNIQ, name, type, hash_func, compare_func, NULL, NULL, static)
+
+#define DEFINE_HASH_OPS_WITH_KEY_DESTRUCTOR(name, type, hash_func, compare_func, free_func) \
+        _DEFINE_HASH_OPS_WITH_KEY_DESTRUCTOR(UNIQ, name, type, hash_func, compare_func, free_func,)
+
+#define DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR(name, type, hash_func, compare_func, free_func) \
+        _DEFINE_HASH_OPS_WITH_KEY_DESTRUCTOR(UNIQ, name, type, hash_func, compare_func, free_func, static)
+
+#define DEFINE_HASH_OPS_WITH_VALUE_DESTRUCTOR(name, type, hash_func, compare_func, value_type, free_func) \
+        _DEFINE_HASH_OPS_WITH_VALUE_DESTRUCTOR(UNIQ, name, type, hash_func, compare_func, value_type, free_func,)
+
+#define DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(name, type, hash_func, compare_func, value_type, free_func) \
+        _DEFINE_HASH_OPS_WITH_VALUE_DESTRUCTOR(UNIQ, name, type, hash_func, compare_func, value_type, free_func, static)
+
+#define DEFINE_HASH_OPS_FULL(name, type, hash_func, compare_func, free_key_func, value_type, free_value_func) \
+        _DEFINE_HASH_OPS_FULL(UNIQ, name, type, hash_func, compare_func, free_key_func, value_type, free_value_func,)
+
+#define DEFINE_PRIVATE_HASH_OPS_FULL(name, type, hash_func, compare_func, free_key_func, value_type, free_value_func) \
+        _DEFINE_HASH_OPS_FULL(UNIQ, name, type, hash_func, compare_func, free_key_func, value_type, free_value_func, static)
+
+void string_hash_func(const char *p, struct siphash *state);
+#define string_compare_func strcmp
 extern const struct hash_ops string_hash_ops;
 
-void path_hash_func(const void *p, struct siphash *state);
-int path_compare_func(const void *a, const void *b) _pure_;
+void path_hash_func(const char *p, struct siphash *state);
+int path_compare_func(const char *a, const char *b) _pure_;
 extern const struct hash_ops path_hash_ops;
 
 /* This will compare the passed pointers directly, and will not dereference them. This is hence not useful for strings
@@ -28,15 +89,15 @@ extern const struct hash_ops trivial_hash_ops;
 
 /* 32bit values we can always just embed in the pointer itself, but in order to support 32bit archs we need store 64bit
  * values indirectly, since they don't fit in a pointer. */
-void uint64_hash_func(const void *p, struct siphash *state);
-int uint64_compare_func(const void *a, const void *b) _pure_;
+void uint64_hash_func(const uint64_t *p, struct siphash *state);
+int uint64_compare_func(const uint64_t *a, const uint64_t *b) _pure_;
 extern const struct hash_ops uint64_hash_ops;
 
 /* On some archs dev_t is 32bit, and on others 64bit. And sometimes it's 64bit on 32bit archs, and sometimes 32bit on
  * 64bit archs. Yuck! */
 #if SIZEOF_DEV_T != 8
-void devt_hash_func(const void *p, struct siphash *state) _pure_;
-int devt_compare_func(const void *a, const void *b) _pure_;
+void devt_hash_func(const dev_t *p, struct siphash *state) _pure_;
+int devt_compare_func(const dev_t *a, const dev_t *b) _pure_;
 extern const struct hash_ops devt_hash_ops;
 #else
 #define devt_hash_func uint64_hash_func
diff --git a/src/systemd/src/basic/hashmap.c b/src/systemd/src/basic/hashmap.c
index 328c4d3a5a..e31ffaca5e 100644
--- a/src/systemd/src/basic/hashmap.c
+++ b/src/systemd/src/basic/hashmap.c
@@ -278,7 +278,7 @@ static const struct hashmap_type_info hashmap_type_info[_HASHMAP_TYPE_MAX] = {
 };
 
 #if VALGRIND
-__attribute__((destructor)) static void cleanup_pools(void) {
+_destructor_ static void cleanup_pools(void) {
         _cleanup_free_ char *t = NULL;
         int r;
 
@@ -781,7 +781,7 @@ static struct HashmapBase *hashmap_base_new(const struct hash_ops *hash_ops, enu
 
         h->type = type;
         h->from_pool = up;
-        h->hash_ops = hash_ops ? hash_ops : &trivial_hash_ops;
+        h->hash_ops = hash_ops ?: &trivial_hash_ops;
 
         if (type == HASHMAP_TYPE_ORDERED) {
                 OrderedHashmap *lh = (OrderedHashmap*)h;
@@ -850,7 +850,7 @@ int internal_set_ensure_allocated(Set **s, const struct hash_ops *hash_ops  HASH
 
 static void hashmap_free_no_clear(HashmapBase *h) {
         assert(!h->has_indirect);
-        assert(!h->n_direct_entries);
+        assert(h->n_direct_entries == 0);
 
 #if ENABLE_DEBUG_HASHMAP
         assert_se(pthread_mutex_lock(&hashmap_debug_list_mutex) == 0);
@@ -866,46 +866,41 @@ static void hashmap_free_no_clear(HashmapBase *h) {
                 free(h);
 }
 
-HashmapBase *internal_hashmap_free(HashmapBase *h) {
-
-        /* Free the hashmap, but nothing in it */
-
+HashmapBase *internal_hashmap_free(HashmapBase *h, free_func_t default_free_key, free_func_t default_free_value) {
         if (h) {
-                internal_hashmap_clear(h);
+                internal_hashmap_clear(h, default_free_key, default_free_value);
                 hashmap_free_no_clear(h);
         }
 
         return NULL;
 }
 
-HashmapBase *internal_hashmap_free_free(HashmapBase *h) {
-
-        /* Free the hashmap and all data objects in it, but not the
-         * keys */
+void internal_hashmap_clear(HashmapBase *h, free_func_t default_free_key, free_func_t default_free_value) {
+        free_func_t free_key, free_value;
+        if (!h)
+                return;
 
-        if (h) {
-                internal_hashmap_clear_free(h);
-                hashmap_free_no_clear(h);
-        }
+        free_key = h->hash_ops->free_key ?: default_free_key;
+        free_value = h->hash_ops->free_value ?: default_free_value;
 
-        return NULL;
-}
+        if (free_key || free_value) {
 
-Hashmap *hashmap_free_free_free(Hashmap *h) {
+                /* If destructor calls are defined, let's destroy things defensively: let's take the item out of the
+                 * hash table, and only then call the destructor functions. If these destructors then try to unregister
+                 * themselves from our hash table a second time, the entry is already gone. */
 
-        /* Free the hashmap and all data and key objects in it */
+                while (internal_hashmap_size(h) > 0) {
+                        void *v, *k;
 
-        if (h) {
-                hashmap_clear_free_free(h);
-                hashmap_free_no_clear(HASHMAP_BASE(h));
-        }
+                        v = internal_hashmap_first_key_and_value(h, true, &k);
 
-        return NULL;
-}
+                        if (free_key)
+                                free_key(k);
 
-void internal_hashmap_clear(HashmapBase *h) {
-        if (!h)
-                return;
+                        if (free_value)
+                                free_value(v);
+                }
+        }
 
         if (h->has_indirect) {
                 free(h->indirect.storage);
@@ -923,35 +918,6 @@ void internal_hashmap_clear(HashmapBase *h) {
         base_set_dirty(h);
 }
 
-void internal_hashmap_clear_free(HashmapBase *h) {
-        unsigned idx;
-
-        if (!h)
-                return;
-
-        for (idx = skip_free_buckets(h, 0); idx != IDX_NIL;
-             idx = skip_free_buckets(h, idx + 1))
-                free(entry_value(h, bucket_at(h, idx)));
-
-        internal_hashmap_clear(h);
-}
-
-void hashmap_clear_free_free(Hashmap *h) {
-        unsigned idx;
-
-        if (!h)
-                return;
-
-        for (idx = skip_free_buckets(HASHMAP_BASE(h), 0); idx != IDX_NIL;
-             idx = skip_free_buckets(HASHMAP_BASE(h), idx + 1)) {
-                struct plain_hashmap_entry *e = plain_bucket_at(h, idx);
-                free((void*)e->b.key);
-                free(e->value);
-        }
-
-        internal_hashmap_clear(HASHMAP_BASE(h));
-}
-
 static int resize_buckets(HashmapBase *h, unsigned entries_add);
 
 /*
@@ -1515,8 +1481,8 @@ int hashmap_remove_and_replace(Hashmap *h, const void *old_key, const void *new_
         return 0;
 }
 
-void *hashmap_remove_value(Hashmap *h, const void *key, void *value) {
-        struct plain_hashmap_entry *e;
+void *internal_hashmap_remove_value(HashmapBase *h, const void *key, void *value) {
+        struct hashmap_base_entry *e;
         unsigned hash, idx;
 
         if (!h)
@@ -1527,8 +1493,8 @@ void *hashmap_remove_value(Hashmap *h, const void *key, void *value) {
         if (idx == IDX_NIL)
                 return NULL;
 
-        e = plain_bucket_at(h, idx);
-        if (e->value != value)
+        e = bucket_at(h, idx);
+        if (entry_value(h, e) != value)
                 return NULL;
 
         remove_entry(h, idx);
@@ -1742,7 +1708,7 @@ HashmapBase *internal_hashmap_copy(HashmapBase *h) {
         }
 
         if (r < 0) {
-                internal_hashmap_free(copy);
+                internal_hashmap_free(copy, false, false);
                 return NULL;
         }
 
diff --git a/src/systemd/src/basic/hashmap.h b/src/systemd/src/basic/hashmap.h
index bb2a5c76ec..5bf807a76f 100644
--- a/src/systemd/src/basic/hashmap.h
+++ b/src/systemd/src/basic/hashmap.h
@@ -22,6 +22,8 @@
 
 #define HASH_KEY_SIZE 16
 
+typedef void* (*hashmap_destroy_t)(void *p);
+
 /* The base type for all hashmap and set types. Many functions in the
  * implementation take (HashmapBase*) parameters and are run-time polymorphic,
  * though the API is not meant to be polymorphic (do not call functions
@@ -87,25 +89,33 @@ OrderedHashmap *internal_ordered_hashmap_new(const struct hash_ops *hash_ops  HA
 #define hashmap_new(ops) internal_hashmap_new(ops  HASHMAP_DEBUG_SRC_ARGS)
 #define ordered_hashmap_new(ops) internal_ordered_hashmap_new(ops  HASHMAP_DEBUG_SRC_ARGS)
 
-HashmapBase *internal_hashmap_free(HashmapBase *h);
+HashmapBase *internal_hashmap_free(HashmapBase *h, free_func_t default_free_key, free_func_t default_free_value);
 static inline Hashmap *hashmap_free(Hashmap *h) {
-        return (void*)internal_hashmap_free(HASHMAP_BASE(h));
+        return (void*) internal_hashmap_free(HASHMAP_BASE(h), NULL, NULL);
 }
 static inline OrderedHashmap *ordered_hashmap_free(OrderedHashmap *h) {
-        return (void*)internal_hashmap_free(HASHMAP_BASE(h));
+        return (void*) internal_hashmap_free(HASHMAP_BASE(h), NULL, NULL);
 }
 
-HashmapBase *internal_hashmap_free_free(HashmapBase *h);
 static inline Hashmap *hashmap_free_free(Hashmap *h) {
-        return (void*)internal_hashmap_free_free(HASHMAP_BASE(h));
+        return (void*) internal_hashmap_free(HASHMAP_BASE(h), NULL, free);
 }
 static inline OrderedHashmap *ordered_hashmap_free_free(OrderedHashmap *h) {
-        return (void*)internal_hashmap_free_free(HASHMAP_BASE(h));
+        return (void*) internal_hashmap_free(HASHMAP_BASE(h), NULL, free);
+}
+
+static inline Hashmap *hashmap_free_free_key(Hashmap *h) {
+        return (void*) internal_hashmap_free(HASHMAP_BASE(h), free, NULL);
+}
+static inline OrderedHashmap *ordered_hashmap_free_free_key(OrderedHashmap *h) {
+        return (void*) internal_hashmap_free(HASHMAP_BASE(h), free, NULL);
 }
 
-Hashmap *hashmap_free_free_free(Hashmap *h);
+static inline Hashmap *hashmap_free_free_free(Hashmap *h) {
+        return (void*) internal_hashmap_free(HASHMAP_BASE(h), free, free);
+}
 static inline OrderedHashmap *ordered_hashmap_free_free_free(OrderedHashmap *h) {
-        return (void*)hashmap_free_free_free(PLAIN_HASHMAP(h));
+        return (void*) internal_hashmap_free(HASHMAP_BASE(h), free, free);
 }
 
 IteratedCache *iterated_cache_free(IteratedCache *cache);
@@ -181,7 +191,11 @@ static inline void *ordered_hashmap_remove2(OrderedHashmap *h, const void *key,
         return hashmap_remove2(PLAIN_HASHMAP(h), key, rkey);
 }
 
-void *hashmap_remove_value(Hashmap *h, const void *key, void *value);
+void *internal_hashmap_remove_value(HashmapBase *h, const void *key, void *value);
+static inline void *hashmap_remove_value(Hashmap *h, const void *key, void *value) {
+        return internal_hashmap_remove_value(HASHMAP_BASE(h), key, value);
+}
+
 static inline void *ordered_hashmap_remove_value(OrderedHashmap *h, const void *key, void *value) {
         return hashmap_remove_value(PLAIN_HASHMAP(h), key, value);
 }
@@ -258,25 +272,33 @@ static inline bool ordered_hashmap_iterate(OrderedHashmap *h, Iterator *i, void
         return internal_hashmap_iterate(HASHMAP_BASE(h), i, value, key);
 }
 
-void internal_hashmap_clear(HashmapBase *h);
+void internal_hashmap_clear(HashmapBase *h, free_func_t default_free_key, free_func_t default_free_value);
 static inline void hashmap_clear(Hashmap *h) {
-        internal_hashmap_clear(HASHMAP_BASE(h));
+        internal_hashmap_clear(HASHMAP_BASE(h), NULL, NULL);
 }
 static inline void ordered_hashmap_clear(OrderedHashmap *h) {
-        internal_hashmap_clear(HASHMAP_BASE(h));
+        internal_hashmap_clear(HASHMAP_BASE(h), NULL, NULL);
 }
 
-void internal_hashmap_clear_free(HashmapBase *h);
 static inline void hashmap_clear_free(Hashmap *h) {
-        internal_hashmap_clear_free(HASHMAP_BASE(h));
+        internal_hashmap_clear(HASHMAP_BASE(h), NULL, free);
 }
 static inline void ordered_hashmap_clear_free(OrderedHashmap *h) {
-        internal_hashmap_clear_free(HASHMAP_BASE(h));
+        internal_hashmap_clear(HASHMAP_BASE(h), NULL, free);
 }
 
-void hashmap_clear_free_free(Hashmap *h);
+static inline void hashmap_clear_free_key(Hashmap *h) {
+        internal_hashmap_clear(HASHMAP_BASE(h), free, NULL);
+}
+static inline void ordered_hashmap_clear_free_key(OrderedHashmap *h) {
+        internal_hashmap_clear(HASHMAP_BASE(h), free, NULL);
+}
+
+static inline void hashmap_clear_free_free(Hashmap *h) {
+        internal_hashmap_clear(HASHMAP_BASE(h), free, free);
+}
 static inline void ordered_hashmap_clear_free_free(OrderedHashmap *h) {
-        hashmap_clear_free_free(PLAIN_HASHMAP(h));
+        internal_hashmap_clear(HASHMAP_BASE(h), free, free);
 }
 
 /*
diff --git a/src/systemd/src/basic/hostname-util.c b/src/systemd/src/basic/hostname-util.c
index 0dbdfd5ce7..6a3d4afb46 100644
--- a/src/systemd/src/basic/hostname-util.c
+++ b/src/systemd/src/basic/hostname-util.c
@@ -73,12 +73,12 @@ int gethostname_strict(char **ret) {
         return 0;
 }
 
-static bool hostname_valid_char(char c) {
+bool valid_ldh_char(char c) {
         return
                 (c >= 'a' && c <= 'z') ||
                 (c >= 'A' && c <= 'Z') ||
                 (c >= '0' && c <= '9') ||
-                IN_SET(c, '-', '_', '.');
+                c == '-';
 }
 
 /**
@@ -94,7 +94,7 @@ static bool hostname_valid_char(char c) {
 bool hostname_is_valid(const char *s, bool allow_trailing_dot) {
         unsigned n_dots = 0;
         const char *p;
-        bool dot;
+        bool dot, hyphen;
 
         if (isempty(s))
                 return false;
@@ -104,23 +104,34 @@ bool hostname_is_valid(const char *s, bool allow_trailing_dot) {
          * sequence. Also ensures that the length stays below
          * HOST_NAME_MAX. */
 
-        for (p = s, dot = true; *p; p++) {
+        for (p = s, dot = hyphen = true; *p; p++)
                 if (*p == '.') {
-                        if (dot)
+                        if (dot || hyphen)
                                 return false;
 
                         dot = true;
+                        hyphen = false;
                         n_dots++;
+
+                } else if (*p == '-') {
+                        if (dot)
+                                return false;
+
+                        dot = false;
+                        hyphen = true;
+
                 } else {
-                        if (!hostname_valid_char(*p))
+                        if (!valid_ldh_char(*p))
                                 return false;
 
                         dot = false;
+                        hyphen = false;
                 }
-        }
 
         if (dot && (n_dots < 2 || !allow_trailing_dot))
                 return false;
+        if (hyphen)
+                return false;
 
         if (p-s > HOST_NAME_MAX) /* Note that HOST_NAME_MAX is 64 on
                                   * Linux, but DNS allows domain names
@@ -132,29 +143,38 @@ bool hostname_is_valid(const char *s, bool allow_trailing_dot) {
 
 char* hostname_cleanup(char *s) {
         char *p, *d;
-        bool dot;
+        bool dot, hyphen;
 
         assert(s);
 
-        strshorten(s, HOST_NAME_MAX);
-
-        for (p = s, d = s, dot = true; *p; p++) {
+        for (p = s, d = s, dot = hyphen = true; *p && d - s < HOST_NAME_MAX; p++)
                 if (*p == '.') {
-                        if (dot)
+                        if (dot || hyphen)
                                 continue;
 
                         *(d++) = '.';
                         dot = true;
-                } else if (hostname_valid_char(*p)) {
+                        hyphen = false;
+
+                } else if (*p == '-') {
+                        if (dot)
+                                continue;
+
+                        *(d++) = '-';
+                        dot = false;
+                        hyphen = true;
+
+                } else if (valid_ldh_char(*p)) {
                         *(d++) = *p;
                         dot = false;
+                        hyphen = false;
                 }
-        }
 
-        if (dot && d > s)
-                d[-1] = 0;
-        else
-                *d = 0;
+        if (d > s && IN_SET(d[-1], '-', '.'))
+                /* The dot can occur at most once, but we might have multiple
+                 * hyphens, hence the loop */
+                d--;
+        *d = 0;
 
         return s;
 }
diff --git a/src/systemd/src/basic/hostname-util.h b/src/systemd/src/basic/hostname-util.h
index 749481723d..7ba386a0fd 100644
--- a/src/systemd/src/basic/hostname-util.h
+++ b/src/systemd/src/basic/hostname-util.h
@@ -11,6 +11,7 @@ bool hostname_is_set(void);
 char* gethostname_malloc(void);
 int gethostname_strict(char **ret);
 
+bool valid_ldh_char(char c) _const_;
 bool hostname_is_valid(const char *s, bool allow_trailing_dot) _pure_;
 char* hostname_cleanup(char *s);
 
diff --git a/src/systemd/src/basic/in-addr-util.c b/src/systemd/src/basic/in-addr-util.c
index 206e00ca93..0f2538e213 100644
--- a/src/systemd/src/basic/in-addr-util.c
+++ b/src/systemd/src/basic/in-addr-util.c
@@ -366,7 +366,7 @@ int in_addr_ifindex_from_string_auto(const char *s, int *family, union in_addr_u
 unsigned char in4_addr_netmask_to_prefixlen(const struct in_addr *addr) {
         assert(addr);
 
-        return 32 - u32ctz(be32toh(addr->s_addr));
+        return 32U - u32ctz(be32toh(addr->s_addr));
 }
 
 struct in_addr* in4_addr_prefixlen_to_netmask(struct in_addr *addr, unsigned char prefixlen) {
@@ -608,15 +608,12 @@ int in_addr_prefix_from_string_auto_internal(
 
 }
 
-void in_addr_data_hash_func(const void *p, struct siphash *state) {
-        const struct in_addr_data *a = p;
-
+static void in_addr_data_hash_func(const struct in_addr_data *a, struct siphash *state) {
         siphash24_compress(&a->family, sizeof(a->family), state);
         siphash24_compress(&a->address, FAMILY_ADDRESS_SIZE(a->family), state);
 }
 
-int in_addr_data_compare_func(const void *a, const void *b) {
-        const struct in_addr_data *x = a, *y = b;
+static int in_addr_data_compare_func(const struct in_addr_data *x, const struct in_addr_data *y) {
         int r;
 
         r = CMP(x->family, y->family);
@@ -626,8 +623,5 @@ int in_addr_data_compare_func(const void *a, const void *b) {
         return memcmp(&x->address, &y->address, FAMILY_ADDRESS_SIZE(x->family));
 }
 
-const struct hash_ops in_addr_data_hash_ops = {
-        .hash = in_addr_data_hash_func,
-        .compare = in_addr_data_compare_func,
-};
+DEFINE_HASH_OPS(in_addr_data_hash_ops, struct in_addr_data, in_addr_data_hash_func, in_addr_data_compare_func);
 #endif /* NM_IGNORED */
diff --git a/src/systemd/src/basic/in-addr-util.h b/src/systemd/src/basic/in-addr-util.h
index 2f64c31f96..5de85cc422 100644
--- a/src/systemd/src/basic/in-addr-util.h
+++ b/src/systemd/src/basic/in-addr-util.h
@@ -69,6 +69,4 @@ static inline size_t FAMILY_ADDRESS_SIZE(int family) {
  * See also oss-fuzz#11344. */
 #define IN_ADDR_NULL ((union in_addr_union) { .in6 = {} })
 
-void in_addr_data_hash_func(const void *p, struct siphash *state);
-int in_addr_data_compare_func(const void *a, const void *b);
 extern const struct hash_ops in_addr_data_hash_ops;
diff --git a/src/systemd/src/basic/list.h b/src/systemd/src/basic/list.h
index 040680c30a..f7f97000e0 100644
--- a/src/systemd/src/basic/list.h
+++ b/src/systemd/src/basic/list.h
@@ -1,6 +1,8 @@
 /* SPDX-License-Identifier: LGPL-2.1+ */
 #pragma once
 
+#include "macro.h"
+
 /* The head of the linked list. Use this in the structure that shall
  * contain the head of the linked list */
 #define LIST_HEAD(t,name)                                               \
@@ -13,8 +15,8 @@
 /* Initialize the list's head */
 #define LIST_HEAD_INIT(head)                                            \
         do {                                                            \
-                (head) = NULL; }                                        \
-        while (false)
+                (head) = NULL;                                          \
+        } while (false)
 
 /* Initialize a list item */
 #define LIST_INIT(name,item)                                            \
diff --git a/src/systemd/src/basic/macro.h b/src/systemd/src/basic/macro.h
index d1775f2ae9..6a1fdab537 100644
--- a/src/systemd/src/basic/macro.h
+++ b/src/systemd/src/basic/macro.h
@@ -2,33 +2,38 @@
 #pragma once
 
 #include <assert.h>
+#include <errno.h>
 #include <inttypes.h>
 #include <stdbool.h>
 #include <sys/param.h>
 #include <sys/sysmacros.h>
 #include <sys/types.h>
 
-#define _printf_(a, b) __attribute__ ((__format__(printf, a, b)))
+#define _printf_(a, b) __attribute__((__format__(printf, a, b)))
 #ifdef __clang__
 #  define _alloc_(...)
 #else
-#  define _alloc_(...) __attribute__ ((__alloc_size__(__VA_ARGS__)))
+#  define _alloc_(...) __attribute__((__alloc_size__(__VA_ARGS__)))
 #endif
-#define _sentinel_ __attribute__ ((__sentinel__))
-#define _unused_ __attribute__ ((__unused__))
-#define _destructor_ __attribute__ ((__destructor__))
-#define _pure_ __attribute__ ((__pure__))
-#define _const_ __attribute__ ((__const__))
-#define _deprecated_ __attribute__ ((__deprecated__))
-#define _packed_ __attribute__ ((__packed__))
-#define _malloc_ __attribute__ ((__malloc__))
-#define _weak_ __attribute__ ((__weak__))
+#define _sentinel_ __attribute__((__sentinel__))
+#define _section_(x) __attribute__((__section__(x)))
+#define _used_ __attribute__((__used__))
+#define _unused_ __attribute__((__unused__))
+#define _destructor_ __attribute__((__destructor__))
+#define _pure_ __attribute__((__pure__))
+#define _const_ __attribute__((__const__))
+#define _deprecated_ __attribute__((__deprecated__))
+#define _packed_ __attribute__((__packed__))
+#define _malloc_ __attribute__((__malloc__))
+#define _weak_ __attribute__((__weak__))
 #define _likely_(x) (__builtin_expect(!!(x), 1))
 #define _unlikely_(x) (__builtin_expect(!!(x), 0))
-#define _public_ __attribute__ ((__visibility__("default")))
-#define _hidden_ __attribute__ ((__visibility__("hidden")))
+#define _public_ __attribute__((__visibility__("default")))
+#define _hidden_ __attribute__((__visibility__("hidden")))
 #define _weakref_(x) __attribute__((__weakref__(#x)))
+#define _align_(x) __attribute__((__aligned__(x)))
 #define _alignas_(x) __attribute__((__aligned__(__alignof(x))))
+#define _alignptr_ __attribute__((__aligned__(sizeof(void*))))
 #define _cleanup_(x) __attribute__((__cleanup__(x)))
 #if __GNUC__ >= 7
 #define _fallthrough_ __attribute__((__fallthrough__))
@@ -56,6 +61,29 @@
 #  endif
 #endif
 
+#if !defined(HAS_FEATURE_ADDRESS_SANITIZER)
+#  ifdef __SANITIZE_ADDRESS__
+#      define HAS_FEATURE_ADDRESS_SANITIZER 1
+#  elif defined(__has_feature)
+#    if __has_feature(address_sanitizer)
+#      define HAS_FEATURE_ADDRESS_SANITIZER 1
+#    endif
+#  endif
+#  if !defined(HAS_FEATURE_ADDRESS_SANITIZER)
+#    define HAS_FEATURE_ADDRESS_SANITIZER 0
+#  endif
+#endif
+
+/* Note: on GCC "no_sanitize_address" is a function attribute only, on llvm it may also be applied to global
+ * variables. We define a specific macro which knows this. Note that on GCC we don't need this decorator so much, since
+ * our primary usecase for this attribute is registration structures placed in named ELF sections which shall not be
+ * padded, but GCC doesn't pad those anyway if AddressSanitizer is enabled. */
+#if HAS_FEATURE_ADDRESS_SANITIZER && defined(__clang__)
+#define _variable_no_sanitize_address_ __attribute__((__no_sanitize_address__))
+#else
+#define _variable_no_sanitize_address_
+#endif
+
 #if (defined (__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))) || defined (__clang__)
 /* Temporarily disable some warnings */
 #define DISABLE_WARNING_FORMAT_NONLITERAL                               \
@@ -255,11 +283,12 @@ static inline unsigned long ALIGN_POWER2(unsigned long u) {
  * computation should be possible in the given type. Therefore, we use
  * [x / y + !!(x % y)]. Note that on "Real CPUs" a division returns both the
  * quotient and the remainder, so both should be equally fast. */
-#define DIV_ROUND_UP(_x, _y)                                            \
+#define DIV_ROUND_UP(x, y) __DIV_ROUND_UP(UNIQ, (x), UNIQ, (y))
+#define __DIV_ROUND_UP(xq, x, yq, y)                                    \
         ({                                                              \
-                const typeof(_x) __x = (_x);                            \
-                const typeof(_y) __y = (_y);                            \
-                (__x / __y + !!(__x % __y));                            \
+                const typeof(x) UNIQ_T(X, xq) = (x);                    \
+                const typeof(y) UNIQ_T(Y, yq) = (y);                    \
+                (UNIQ_T(X, xq) / UNIQ_T(Y, yq) + !!(UNIQ_T(X, xq) % UNIQ_T(Y, yq))); \
         })
 
 #ifdef __COVERITY__
@@ -466,6 +495,11 @@ static inline int __coverity_check__(int condition) {
 #endif
 #endif
 
+#define DEFINE_TRIVIAL_DESTRUCTOR(name, type, func)             \
+        static inline void name(type *p) {                      \
+                func(p);                                        \
+        }
+
 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func)                 \
         static inline void func##p(type *p) {                   \
                 if (*p)                                         \
diff --git a/src/systemd/src/basic/parse-util.c b/src/systemd/src/basic/parse-util.c
index 09ae085511..1f0b711113 100644
--- a/src/systemd/src/basic/parse-util.c
+++ b/src/systemd/src/basic/parse-util.c
@@ -4,6 +4,7 @@
 
 #include <errno.h>
 #include <inttypes.h>
+#include <linux/oom.h>
 #include <locale.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -18,10 +19,12 @@
 #include "missing.h"
 #include "parse-util.h"
 #include "process-util.h"
+#include "stat-util.h"
 #include "string-util.h"
 
 int parse_boolean(const char *v) {
-        assert(v);
+        if (!v)
+                return -EINVAL;
 
         if (streq(v, "1") || strcaseeq(v, "yes") || strcaseeq(v, "y") || strcaseeq(v, "true") || strcaseeq(v, "t") || strcaseeq(v, "on"))
                 return 1;
@@ -715,18 +718,51 @@ int parse_ip_port(const char *s, uint16_t *ret) {
         return 0;
 }
 
+int parse_ip_port_range(const char *s, uint16_t *low, uint16_t *high) {
+        unsigned l, h;
+        int r;
+
+        r = parse_range(s, &l, &h);
+        if (r < 0)
+                return r;
+
+        if (l <= 0 || l > 65535 || h <= 0 || h > 65535)
+                return -EINVAL;
+
+        if (h < l)
+                return -EINVAL;
+
+        *low = l;
+        *high = h;
+
+        return 0;
+}
+
 int parse_dev(const char *s, dev_t *ret) {
+        const char *major;
         unsigned x, y;
-        dev_t d;
+        size_t n;
+        int r;
 
-        if (sscanf(s, "%u:%u", &x, &y) != 2)
+        n = strspn(s, DIGITS);
+        if (n == 0)
                 return -EINVAL;
-
-        d = makedev(x, y);
-        if ((unsigned) major(d) != x || (unsigned) minor(d) != y)
+        if (s[n] != ':')
                 return -EINVAL;
 
-        *ret = d;
+        major = strndupa(s, n);
+        r = safe_atou(major, &x);
+        if (r < 0)
+                return r;
+
+        r = safe_atou(s + n + 1, &y);
+        if (r < 0)
+                return r;
+
+        if (!DEVICE_MAJOR_VALID(x) || !DEVICE_MINOR_VALID(y))
+                return -ERANGE;
+
+        *ret = makedev(x, y);
         return 0;
 }
 
diff --git a/src/systemd/src/basic/parse-util.h b/src/systemd/src/basic/parse-util.h
index f3267f4cfe..e47641b429 100644
--- a/src/systemd/src/basic/parse-util.h
+++ b/src/systemd/src/basic/parse-util.h
@@ -115,5 +115,6 @@ int parse_permille(const char *p);
 int parse_nice(const char *p, int *ret);
 
 int parse_ip_port(const char *s, uint16_t *ret);
+int parse_ip_port_range(const char *s, uint16_t *low, uint16_t *high);
 
 int parse_oom_score_adjust(const char *s, int *ret);
diff --git a/src/systemd/src/basic/path-util.c b/src/systemd/src/basic/path-util.c
index dc37e04dd7..1446ecdc85 100644
--- a/src/systemd/src/basic/path-util.c
+++ b/src/systemd/src/basic/path-util.c
@@ -113,7 +113,7 @@ int path_make_absolute_cwd(const char *p, char **ret) {
                 if (r < 0)
                         return r;
 
-                c = path_join(NULL, cwd, p);
+                c = path_join(cwd, p);
         }
         if (!c)
                 return -ENOMEM;
@@ -486,18 +486,62 @@ bool path_equal_or_files_same(const char *a, const char *b, int flags) {
         return path_equal(a, b) || files_same(a, b, flags) > 0;
 }
 
-char* path_join(const char *root, const char *path, const char *rest) {
-        assert(path);
+char* path_join_internal(const char *first, ...) {
+        char *joined, *q;
+        const char *p;
+        va_list ap;
+        bool slash;
+        size_t sz;
+
+        /* Joins all listed strings until the sentinel and places a "/" between them unless the strings end/begin
+         * already with one so that it is unnecessary. Note that slashes which are already duplicate won't be
+         * removed. The string returned is hence always equal to or longer than the sum of the lengths of each
+         * individual string.
+         *
+         * Note: any listed empty string is simply skipped. This can be useful for concatenating strings of which some
+         * are optional.
+         *
+         * Examples:
+         *
+         * path_join("foo", "bar") → "foo/bar"
+         * path_join("foo/", "bar") → "foo/bar"
+         * path_join("", "foo", "", "bar", "") → "foo/bar" */
+
+        sz = strlen_ptr(first);
+        va_start(ap, first);
+        while ((p = va_arg(ap, char*)) != (const char*) -1)
+                if (!isempty(p))
+                        sz += 1 + strlen(p);
+        va_end(ap);
+
+        joined = new(char, sz + 1);
+        if (!joined)
+                return NULL;
 
-        if (!isempty(root))
-                return strjoin(root, endswith(root, "/") ? "" : "/",
-                               path[0] == '/' ? path+1 : path,
-                               rest ? (endswith(path, "/") ? "" : "/") : NULL,
-                               rest && rest[0] == '/' ? rest+1 : rest);
-        else
-                return strjoin(path,
-                               rest ? (endswith(path, "/") ? "" : "/") : NULL,
-                               rest && rest[0] == '/' ? rest+1 : rest);
+        if (!isempty(first)) {
+                q = stpcpy(joined, first);
+                slash = endswith(first, "/");
+        } else {
+                /* Skip empty items */
+                joined[0] = 0;
+                q = joined;
+                slash = true; /* no need to generate a slash anymore */
+        }
+
+        va_start(ap, first);
+        while ((p = va_arg(ap, char*)) != (const char*) -1) {
+                if (isempty(p))
+                        continue;
+
+                if (!slash && p[0] != '/')
+                        *(q++) = '/';
+
+                q = stpcpy(q, p);
+                slash = endswith(p, "/");
+        }
+        va_end(ap);
+
+        return joined;
 }
 
 int find_binary(const char *name, char **ret) {
@@ -755,6 +799,9 @@ const char *last_path_component(const char *path) {
 
         unsigned l, k;
 
+        if (!path)
+                return NULL;
+
         l = k = strlen(path);
         if (l == 0) /* special case — an empty string */
                 return path;
@@ -770,6 +817,37 @@ const char *last_path_component(const char *path) {
 
         return path + k;
 }
+
+int path_extract_filename(const char *p, char **ret) {
+        _cleanup_free_ char *a = NULL;
+        const char *c, *e = NULL, *q;
+
+        /* Extracts the filename part (i.e. right-most component) from a path, i.e. string that passes
+         * filename_is_valid(). A wrapper around last_path_component(), but eats up trailing slashes. */
+
+        if (!p)
+                return -EINVAL;
+
+        c = last_path_component(p);
+
+        for (q = c; *q != 0; q++)
+                if (*q != '/')
+                        e = q + 1;
+
+        if (!e) /* no valid character? */
+                return -EINVAL;
+
+        a = strndup(c, e - c);
+        if (!a)
+                return -ENOMEM;
+
+        if (!filename_is_valid(a))
+                return -EINVAL;
+
+        *ret = TAKE_PTR(a);
+
+        return 0;
+}
 #endif /* NM_IGNORED */
 
 bool filename_is_valid(const char *p) {
@@ -926,8 +1004,7 @@ bool valid_device_allow_pattern(const char *path) {
         /* Like valid_device_node_path(), but also allows full-subsystem expressions, like DeviceAllow= and DeviceDeny=
          * accept it */
 
-        if (startswith(path, "block-") ||
-            startswith(path, "char-"))
+        if (STARTSWITH_SET(path, "block-", "char-"))
                 return true;
 
         return valid_device_node_path(path);
@@ -1071,6 +1148,13 @@ int path_simplify_and_warn(
                 return -EINVAL;
         }
 
+        if (!path_is_valid(path)) {
+                log_syntax(unit, LOG_ERR, filename, line, 0,
+                           "%s= path has invalid length (%zu bytes)%s.",
+                           lvalue, strlen(path), fatal ? "" : ", ignoring");
+                return -EINVAL;
+        }
+
         return 0;
 }
 #endif /* NM_IGNORED */
diff --git a/src/systemd/src/basic/path-util.h b/src/systemd/src/basic/path-util.h
index 4a4bd4cd51..56ebd59c6f 100644
--- a/src/systemd/src/basic/path-util.h
+++ b/src/systemd/src/basic/path-util.h
@@ -7,6 +7,7 @@
 
 #include "macro.h"
 #include "string-util.h"
+#include "strv.h"
 #include "time-util.h"
 
 #if 0 /* NM_IGNORED */
@@ -50,7 +51,9 @@ char* path_startswith(const char *path, const char *prefix) _pure_;
 int path_compare(const char *a, const char *b) _pure_;
 bool path_equal(const char *a, const char *b) _pure_;
 bool path_equal_or_files_same(const char *a, const char *b, int flags);
-char* path_join(const char *root, const char *path, const char *rest);
+char* path_join_internal(const char *first, ...);
+#define path_join(x, ...) path_join_internal(x, __VA_ARGS__, (const char*) -1)
+
 char* path_simplify(char *path, bool kill_dots);
 
 static inline bool path_equal_ptr(const char *a, const char *b) {
@@ -72,13 +75,13 @@ static inline bool path_equal_ptr(const char *a, const char *b) {
 
 #define PATH_STARTSWITH_SET(p, ...)                             \
         ({                                                      \
-                char **s;                                       \
-                bool _found = false;                            \
-                STRV_FOREACH(s, STRV_MAKE(__VA_ARGS__))         \
-                        if (path_startswith(p, *s)) {           \
-                               _found = true;                   \
-                               break;                           \
-                        }                                       \
+                const char *_p = (p);                           \
+                char *_found = NULL, **_i;                      \
+                STRV_FOREACH(_i, STRV_MAKE(__VA_ARGS__)) {      \
+                        _found = path_startswith(_p, *_i);      \
+                        if (_found)                             \
+                                break;                          \
+                }                                               \
                 _found;                                         \
         })
 
@@ -96,12 +99,24 @@ int mkfs_exists(const char *fstype);
 /* Iterates through the path prefixes of the specified path, going up
  * the tree, to root. Also returns "" (and not "/"!) for the root
  * directory. Excludes the specified directory itself */
-#define PATH_FOREACH_PREFIX(prefix, path) \
-        for (char *_slash = ({ path_simplify(strcpy(prefix, path), false); streq(prefix, "/") ? NULL : strrchr(prefix, '/'); }); _slash && ((*_slash = 0), true); _slash = strrchr((prefix), '/'))
+#define PATH_FOREACH_PREFIX(prefix, path)                               \
+        for (char *_slash = ({                                          \
+                                path_simplify(strcpy(prefix, path), false); \
+                                streq(prefix, "/") ? NULL : strrchr(prefix, '/'); \
+                        });                                             \
+             _slash && ((*_slash = 0), true);                           \
+             _slash = strrchr((prefix), '/'))
 
 /* Same as PATH_FOREACH_PREFIX but also includes the specified path itself */
-#define PATH_FOREACH_PREFIX_MORE(prefix, path) \
-        for (char *_slash = ({ path_simplify(strcpy(prefix, path), false); if (streq(prefix, "/")) prefix[0] = 0; strrchr(prefix, 0); }); _slash && ((*_slash = 0), true); _slash = strrchr((prefix), '/'))
+#define PATH_FOREACH_PREFIX_MORE(prefix, path)                          \
+        for (char *_slash = ({                                          \
+                                path_simplify(strcpy(prefix, path), false); \
+                                if (streq(prefix, "/"))                 \
+                                        prefix[0] = 0;                  \
+                                strrchr(prefix, 0);                     \
+                        });                                             \
+             _slash && ((*_slash = 0), true);                           \
+             _slash = strrchr((prefix), '/'))
 
 char *prefix_root(const char *root, const char *path);
 
@@ -134,6 +149,7 @@ int parse_path_argument_and_warn(const char *path, bool suppress_root, char **ar
 
 char* dirname_malloc(const char *path);
 const char *last_path_component(const char *path);
+int path_extract_filename(const char *p, char **ret);
 
 bool filename_is_valid(const char *p) _pure_;
 bool path_is_valid(const char *p) _pure_;
diff --git a/src/systemd/src/basic/prioq.c b/src/systemd/src/basic/prioq.c
index 3af3402504..14e29c52e4 100644
--- a/src/systemd/src/basic/prioq.c
+++ b/src/systemd/src/basic/prioq.c
@@ -67,9 +67,6 @@ int prioq_ensure_allocated(Prioq **q, compare_func_t compare_func) {
 }
 
 static void swap(Prioq *q, unsigned j, unsigned k) {
-        void *saved_data;
-        unsigned *saved_idx;
-
         assert(q);
         assert(j < q->n_items);
         assert(k < q->n_items);
@@ -77,12 +74,8 @@ static void swap(Prioq *q, unsigned j, unsigned k) {
         assert(!q->items[j].idx || *(q->items[j].idx) == j);
         assert(!q->items[k].idx || *(q->items[k].idx) == k);
 
-        saved_data = q->items[j].data;
-        saved_idx = q->items[j].idx;
-        q->items[j].data = q->items[k].data;
-        q->items[j].idx = q->items[k].idx;
-        q->items[k].data = saved_data;
-        q->items[k].idx = saved_idx;
+        SWAP_TWO(q->items[j].data, q->items[k].data);
+        SWAP_TWO(q->items[j].idx, q->items[k].idx);
 
         if (q->items[j].idx)
                 *q->items[j].idx = j;
diff --git a/src/systemd/src/basic/process-util.c b/src/systemd/src/basic/process-util.c
index 4171a23777..bf05b2e8ef 100644
--- a/src/systemd/src/basic/process-util.c
+++ b/src/systemd/src/basic/process-util.c
@@ -39,6 +39,7 @@
 #include "missing.h"
 #include "process-util.h"
 #include "raw-clone.h"
+#include "rlimit-util.h"
 #include "signal-util.h"
 #include "stat-util.h"
 #include "string-table.h"
@@ -604,12 +605,14 @@ int get_process_root(pid_t pid, char **root) {
         return get_process_link_contents(p, root);
 }
 
+#define ENVIRONMENT_BLOCK_MAX (5U*1024U*1024U)
+
 int get_process_environ(pid_t pid, char **env) {
         _cleanup_fclose_ FILE *f = NULL;
         _cleanup_free_ char *outcome = NULL;
-        int c;
-        const char *p;
         size_t allocated = 0, sz = 0;
+        const char *p;
+        int r;
 
         assert(pid >= 0);
         assert(env);
@@ -625,23 +628,28 @@ int get_process_environ(pid_t pid, char **env) {
 
         (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
 
-        while ((c = fgetc(f)) != EOF) {
+        for (;;) {
+                char c;
+
+                if (sz >= ENVIRONMENT_BLOCK_MAX)
+                        return -ENOBUFS;
+
                 if (!GREEDY_REALLOC(outcome, allocated, sz + 5))
                         return -ENOMEM;
 
+                r = safe_fgetc(f, &c);
+                if (r < 0)
+                        return r;
+                if (r == 0)
+                        break;
+
                 if (c == '\0')
                         outcome[sz++] = '\n';
                 else
                         sz += cescape_char(c, outcome + sz);
         }
 
-        if (!outcome) {
-                outcome = strdup("");
-                if (!outcome)
-                        return -ENOMEM;
-        } else
-                outcome[sz] = '\0';
-
+        outcome[sz] = '\0';
         *env = TAKE_PTR(outcome);
 
         return 0;
@@ -874,9 +882,9 @@ int kill_and_sigcont(pid_t pid, int sig) {
 int getenv_for_pid(pid_t pid, const char *field, char **ret) {
         _cleanup_fclose_ FILE *f = NULL;
         char *value = NULL;
-        bool done = false;
         const char *path;
-        size_t l;
+        size_t l, sum = 0;
+        int r;
 
         assert(pid >= 0);
         assert(field);
@@ -899,6 +907,9 @@ int getenv_for_pid(pid_t pid, const char *field, char **ret) {
                 return 1;
         }
 
+        if (!pid_is_valid(pid))
+                return -EINVAL;
+
         path = procfs_file_alloca(pid, "environ");
 
         f = fopen(path, "re");
@@ -912,24 +923,19 @@ int getenv_for_pid(pid_t pid, const char *field, char **ret) {
         (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
 
         l = strlen(field);
+        for (;;) {
+                _cleanup_free_ char *line = NULL;
 
-        do {
-                char line[LINE_MAX];
-                size_t i;
-
-                for (i = 0; i < sizeof(line)-1; i++) {
-                        int c;
+                if (sum > ENVIRONMENT_BLOCK_MAX) /* Give up searching eventually */
+                        return -ENOBUFS;
 
-                        c = getc(f);
-                        if (_unlikely_(c == EOF)) {
-                                done = true;
-                                break;
-                        } else if (c == 0)
-                                break;
+                r = read_nul_string(f, LONG_LINE_MAX, &line);
+                if (r < 0)
+                        return r;
+                if (r == 0)  /* EOF */
+                        break;
 
-                        line[i] = c;
-                }
-                line[i] = 0;
+                sum += r;
 
                 if (strneq(line, field, l) && line[l] == '=') {
                         value = strdup(line + l + 1);
@@ -939,8 +945,7 @@ int getenv_for_pid(pid_t pid, const char *field, char **ret) {
                         *ret = value;
                         return 1;
                 }
-
-        } while (!done);
+        }
 
         *ret = NULL;
         return 0;
@@ -1180,7 +1185,7 @@ void reset_cached_pid(void) {
  * headers. __register_atfork() is mostly equivalent to pthread_atfork(), but doesn't require us to link against
  * libpthread, as it is part of glibc anyway. */
 extern int __register_atfork(void (*prepare) (void), void (*parent) (void), void (*child) (void), void *dso_handle);
-extern void* __dso_handle __attribute__ ((__weak__));
+extern void* __dso_handle _weak_;
 
 pid_t getpid_cached(void) {
         static bool installed = false;
@@ -1259,25 +1264,17 @@ int safe_fork_full(
         original_pid = getpid_cached();
 
         if (flags & (FORK_RESET_SIGNALS|FORK_DEATHSIG)) {
-
                 /* We temporarily block all signals, so that the new child has them blocked initially. This way, we can
                  * be sure that SIGTERMs are not lost we might send to the child. */
 
-                if (sigfillset(&ss) < 0)
-                        return log_full_errno(prio, errno, "Failed to reset signal set: %m");
-
+                assert_se(sigfillset(&ss) >= 0);
                 block_signals = true;
 
         } else if (flags & FORK_WAIT) {
-
                 /* Let's block SIGCHLD at least, so that we can safely watch for the child process */
 
-                if (sigemptyset(&ss) < 0)
-                        return log_full_errno(prio, errno, "Failed to clear signal set: %m");
-
-                if (sigaddset(&ss, SIGCHLD) < 0)
-                        return log_full_errno(prio, errno, "Failed to add SIGCHLD to signal set: %m");
-
+                assert_se(sigemptyset(&ss) >= 0);
+                assert_se(sigaddset(&ss, SIGCHLD) >= 0);
                 block_signals = true;
         }
 
@@ -1410,6 +1407,14 @@ int safe_fork_full(
                 }
         }
 
+        if (flags & FORK_RLIMIT_NOFILE_SAFE) {
+                r = rlimit_nofile_safe();
+                if (r < 0) {
+                        log_full_errno(prio, r, "Failed to lower RLIMIT_NOFILE's soft limit to 1K: %m");
+                        _exit(EXIT_FAILURE);
+                }
+        }
+
         if (ret_pid)
                 *ret_pid = getpid_cached();
 
@@ -1521,6 +1526,8 @@ int fork_agent(const char *name, const int except[], size_t n_except, pid_t *ret
                 safe_close_above_stdio(fd);
         }
 
+        (void) rlimit_nofile_safe();
+
         /* Count arguments */
         va_start(ap, path);
         for (n = 0; va_arg(ap, char*); n++)
diff --git a/src/systemd/src/basic/process-util.h b/src/systemd/src/basic/process-util.h
index fea152cecf..0fad4e1ee9 100644
--- a/src/systemd/src/basic/process-util.h
+++ b/src/systemd/src/basic/process-util.h
@@ -144,15 +144,16 @@ void reset_cached_pid(void);
 int must_be_root(void);
 
 typedef enum ForkFlags {
-        FORK_RESET_SIGNALS = 1 << 0,
-        FORK_CLOSE_ALL_FDS = 1 << 1,
-        FORK_DEATHSIG      = 1 << 2,
-        FORK_NULL_STDIO    = 1 << 3,
-        FORK_REOPEN_LOG    = 1 << 4,
-        FORK_LOG           = 1 << 5,
-        FORK_WAIT          = 1 << 6,
-        FORK_NEW_MOUNTNS   = 1 << 7,
-        FORK_MOUNTNS_SLAVE = 1 << 8,
+        FORK_RESET_SIGNALS      = 1 << 0, /* Reset all signal handlers and signal mask */
+        FORK_CLOSE_ALL_FDS      = 1 << 1, /* Close all open file descriptors in the child, except for 0,1,2 */
+        FORK_DEATHSIG           = 1 << 2, /* Set PR_DEATHSIG in the child */
+        FORK_NULL_STDIO         = 1 << 3, /* Connect 0,1,2 to /dev/null */
+        FORK_REOPEN_LOG         = 1 << 4, /* Reopen log connection */
+        FORK_LOG                = 1 << 5, /* Log above LOG_DEBUG log level about failures */
+        FORK_WAIT               = 1 << 6, /* Wait until child exited */
+        FORK_NEW_MOUNTNS        = 1 << 7, /* Run child in its own mount namespace */
+        FORK_MOUNTNS_SLAVE      = 1 << 8, /* Make child's mount namespace MS_SLAVE */
+        FORK_RLIMIT_NOFILE_SAFE = 1 << 9, /* Set RLIMIT_NOFILE soft limit to 1K for select() compat */
 } ForkFlags;
 
 int safe_fork_full(const char *name, const int except_fds[], size_t n_except_fds, ForkFlags flags, pid_t *ret_pid);
diff --git a/src/systemd/src/basic/random-util.c b/src/systemd/src/basic/random-util.c
index f69ca0f0f4..39ca85eebb 100644
--- a/src/systemd/src/basic/random-util.c
+++ b/src/systemd/src/basic/random-util.c
@@ -9,7 +9,6 @@
 #include <elf.h>
 #include <errno.h>
 #include <fcntl.h>
-#include <linux/random.h>
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdlib.h>
diff --git a/src/systemd/src/basic/set.h b/src/systemd/src/basic/set.h
index 0d99d5550d..2a80632b79 100644
--- a/src/systemd/src/basic/set.h
+++ b/src/systemd/src/basic/set.h
@@ -9,13 +9,11 @@ Set *internal_set_new(const struct hash_ops *hash_ops HASHMAP_DEBUG_PARAMS);
 #define set_new(ops) internal_set_new(ops HASHMAP_DEBUG_SRC_ARGS)
 
 static inline Set *set_free(Set *s) {
-        internal_hashmap_free(HASHMAP_BASE(s));
-        return NULL;
+        return (Set*) internal_hashmap_free(HASHMAP_BASE(s), NULL, NULL);
 }
 
 static inline Set *set_free_free(Set *s) {
-        internal_hashmap_free_free(HASHMAP_BASE(s));
-        return NULL;
+        return (Set*) internal_hashmap_free(HASHMAP_BASE(s), free, NULL);
 }
 
 /* no set_free_free_free */
@@ -76,11 +74,11 @@ static inline unsigned set_buckets(Set *s) {
 bool set_iterate(Set *s, Iterator *i, void **value);
 
 static inline void set_clear(Set *s) {
-        internal_hashmap_clear(HASHMAP_BASE(s));
+        internal_hashmap_clear(HASHMAP_BASE(s), NULL, NULL);
 }
 
 static inline void set_clear_free(Set *s) {
-        internal_hashmap_clear_free(HASHMAP_BASE(s));
+        internal_hashmap_clear(HASHMAP_BASE(s), free, NULL);
 }
 
 /* no set_clear_free_free */
diff --git a/src/systemd/src/basic/socket-util.c b/src/systemd/src/basic/socket-util.c
index 4476f3dc7a..7fcedf3714 100644
--- a/src/systemd/src/basic/socket-util.c
+++ b/src/systemd/src/basic/socket-util.c
@@ -17,6 +17,7 @@
 #include <unistd.h>
 
 #include "alloc-util.h"
+#include "escape.h"
 #include "fd-util.h"
 #include "fileio.h"
 #include "format-util.h"
@@ -114,7 +115,7 @@ int socket_address_parse(SocketAddress *a, const char *s) {
                 size_t l;
 
                 l = strlen(s+1);
-                if (l >= sizeof(a->sockaddr.un.sun_path) - 1) /* Note that we refuse non-NUL-terminate sockets here
+                if (l >= sizeof(a->sockaddr.un.sun_path) - 1) /* Note that we refuse non-NUL-terminated sockets here
                                                                * when parsing, even though abstract namespace sockets
                                                                * explicitly allow embedded NUL bytes and don't consider
                                                                * them special. But it's simply annoying to debug such
@@ -264,9 +265,12 @@ int socket_address_parse_netlink(SocketAddress *a, const char *s) {
         return 0;
 }
 
-int socket_address_verify(const SocketAddress *a) {
+int socket_address_verify(const SocketAddress *a, bool strict) {
         assert(a);
 
+        /* With 'strict' we enforce additional sanity constraints which are not set by the standard,
+         * but should only apply to sockets we create ourselves. */
+
         switch (socket_address_family(a)) {
 
         case AF_INET:
@@ -296,19 +300,20 @@ int socket_address_verify(const SocketAddress *a) {
         case AF_UNIX:
                 if (a->size < offsetof(struct sockaddr_un, sun_path))
                         return -EINVAL;
-                if (a->size > sizeof(struct sockaddr_un)+1) /* Allow one extra byte, since getsockname() on Linux will
-                                                             * append a NUL byte if we have path sockets that are above
-                                                             * sun_path' full size */
+                if (a->size > sizeof(struct sockaddr_un) + !strict)
+                        /* If !strict, allow one extra byte, since getsockname() on Linux will append
+                         * a NUL byte if we have path sockets that are above sun_path's full size. */
                         return -EINVAL;
 
                 if (a->size > offsetof(struct sockaddr_un, sun_path) &&
-                    a->sockaddr.un.sun_path[0] != 0) { /* Only validate file system sockets here */
-
+                    a->sockaddr.un.sun_path[0] != 0 &&
+                    strict) {
+                        /* Only validate file system sockets here, and only in strict mode */
                         const char *e;
 
                         e = memchr(a->sockaddr.un.sun_path, 0, sizeof(a->sockaddr.un.sun_path));
                         if (e) {
-                                /* If there's an embedded NUL byte, make sure the size of the socket addresses matches it */
+                                /* If there's an embedded NUL byte, make sure the size of the socket address matches it */
                                 if (a->size != offsetof(struct sockaddr_un, sun_path) + (e - a->sockaddr.un.sun_path) + 1)
                                         return -EINVAL;
                         } else {
@@ -356,7 +361,10 @@ int socket_address_print(const SocketAddress *a, char **ret) {
         assert(a);
         assert(ret);
 
-        r = socket_address_verify(a);
+        r = socket_address_verify(a, false); /* We do non-strict validation, because we want to be
+                                              * able to pretty-print any socket the kernel considers
+                                              * valid. We still need to do validation to know if we
+                                              * can meaningfully print the address. */
         if (r < 0)
                 return r;
 
@@ -389,8 +397,8 @@ bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) {
         assert(b);
 
         /* Invalid addresses are unequal to all */
-        if (socket_address_verify(a) < 0 ||
-            socket_address_verify(b) < 0)
+        if (socket_address_verify(a, false) < 0 ||
+            socket_address_verify(b, false) < 0)
                 return false;
 
         if (a->type != b->type)
@@ -574,7 +582,13 @@ int sockaddr_port(const struct sockaddr *_sa, unsigned *ret_port) {
         }
 }
 
-int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, bool include_port, char **ret) {
+int sockaddr_pretty(
+                const struct sockaddr *_sa,
+                socklen_t salen,
+                bool translate_ipv6,
+                bool include_port,
+                char **ret) {
+
         union sockaddr_union *sa = (union sockaddr_union*) _sa;
         char *p;
         int r;
@@ -645,42 +659,51 @@ int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_
         }
 
         case AF_UNIX:
-                if (salen <= offsetof(struct sockaddr_un, sun_path)) {
+                if (salen <= offsetof(struct sockaddr_un, sun_path) ||
+                    (sa->un.sun_path[0] == 0 && salen == offsetof(struct sockaddr_un, sun_path) + 1))
+                        /* The name must have at least one character (and the leading NUL does not count) */
                         p = strdup("<unnamed>");
-                        if (!p)
-                                return -ENOMEM;
-
-                } else if (sa->un.sun_path[0] == 0) {
-                        /* abstract */
-
-                        /* FIXME: We assume we can print the
-                         * socket path here and that it hasn't
-                         * more than one NUL byte. That is
-                         * actually an invalid assumption */
-
-                        p = new(char, sizeof(sa->un.sun_path)+1);
-                        if (!p)
-                                return -ENOMEM;
+                else {
+                        /* Note that we calculate the path pointer here through the .un_buffer[] field, in order to
+                         * outtrick bounds checking tools such as ubsan, which are too smart for their own good: on
+                         * Linux the kernel may return sun_path[] data one byte longer than the declared size of the
+                         * field. */
+                        char *path = (char*) sa->un_buffer + offsetof(struct sockaddr_un, sun_path);
+                        size_t path_len = salen - offsetof(struct sockaddr_un, sun_path);
+
+                        if (path[0] == 0) {
+                                /* Abstract socket. When parsing address information from, we
+                                 * explicitly reject overly long paths and paths with embedded NULs.
+                                 * But we might get such a socket from the outside. Let's return
+                                 * something meaningful and printable in this case. */
+
+                                _cleanup_free_ char *e = NULL;
+
+                                e = cescape_length(path + 1, path_len - 1);
+                                if (!e)
+                                        return -ENOMEM;
 
-                        p[0] = '@';
-                        memcpy(p+1, sa->un.sun_path+1, sizeof(sa->un.sun_path)-1);
-                        p[sizeof(sa->un.sun_path)] = 0;
+                                p = strjoin("@", e);
+                        } else {
+                                if (path[path_len - 1] == '\0')
+                                        /* We expect a terminating NUL and don't print it */
+                                        path_len --;
 
-                } else {
-                        p = strndup(sa->un.sun_path, sizeof(sa->un.sun_path));
-                        if (!p)
-                                return -ENOMEM;
+                                p = cescape_length(path, path_len);
+                        }
                 }
+                if (!p)
+                        return -ENOMEM;
 
                 break;
 
         case AF_VSOCK:
-                if (include_port)
-                        r = asprintf(&p,
-                                     "vsock:%u:%u",
-                                     sa->vm.svm_cid,
-                                     sa->vm.svm_port);
-                else
+                if (include_port) {
+                        if (sa->vm.svm_cid == VMADDR_CID_ANY)
+                                r = asprintf(&p, "vsock::%u", sa->vm.svm_port);
+                        else
+                                r = asprintf(&p, "vsock:%u:%u", sa->vm.svm_cid, sa->vm.svm_port);
+                } else
                         r = asprintf(&p, "vsock:%u", sa->vm.svm_cid);
                 if (r < 0)
                         return -ENOMEM;
diff --git a/src/systemd/src/basic/socket-util.h b/src/systemd/src/basic/socket-util.h
index 1ac30de5a3..d2246a8eb8 100644
--- a/src/systemd/src/basic/socket-util.h
+++ b/src/systemd/src/basic/socket-util.h
@@ -1,6 +1,10 @@
 /* SPDX-License-Identifier: LGPL-2.1+ */
 #pragma once
 
+#include <inttypes.h>
+#include <linux/netlink.h>
+#include <linux/if_infiniband.h>
+#include <linux/if_packet.h>
 #include <netinet/ether.h>
 #include <netinet/in.h>
 #include <stdbool.h>
@@ -8,13 +12,10 @@
 #include <sys/socket.h>
 #include <sys/types.h>
 #include <sys/un.h>
-#include <linux/netlink.h>
-#include <linux/if_infiniband.h>
-#include <linux/if_packet.h>
 
 #include "macro.h"
-#include "missing.h"
-#include "util.h"
+#include "missing_socket.h"
+#include "sparse-endian.h"
 
 union sockaddr_union {
         /* The minimal, abstract version */
@@ -72,7 +73,7 @@ int socket_address_parse(SocketAddress *a, const char *s);
 int socket_address_parse_and_warn(SocketAddress *a, const char *s);
 int socket_address_parse_netlink(SocketAddress *a, const char *s);
 int socket_address_print(const SocketAddress *a, char **p);
-int socket_address_verify(const SocketAddress *a) _pure_;
+int socket_address_verify(const SocketAddress *a, bool strict) _pure_;
 
 int sockaddr_un_unlink(const struct sockaddr_un *sa);
 
diff --git a/src/systemd/src/basic/stat-util.c b/src/systemd/src/basic/stat-util.c
index 8cae1e1e3f..e77f40aee5 100644
--- a/src/systemd/src/basic/stat-util.c
+++ b/src/systemd/src/basic/stat-util.c
@@ -12,11 +12,13 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#include "alloc-util.h"
 #include "dirent-util.h"
 #include "fd-util.h"
 #include "fs-util.h"
 #include "macro.h"
 #include "missing.h"
+#include "parse-util.h"
 #include "stat-util.h"
 #include "string-util.h"
 
@@ -300,3 +302,124 @@ int fd_verify_regular(int fd) {
 
         return stat_verify_regular(&st);
 }
+
+#if 0 /* NM_IGNORED */
+int stat_verify_directory(const struct stat *st) {
+        assert(st);
+
+        if (S_ISLNK(st->st_mode))
+                return -ELOOP;
+
+        if (!S_ISDIR(st->st_mode))
+                return -ENOTDIR;
+
+        return 0;
+}
+
+int fd_verify_directory(int fd) {
+        struct stat st;
+
+        assert(fd >= 0);
+
+        if (fstat(fd, &st) < 0)
+                return -errno;
+
+        return stat_verify_directory(&st);
+}
+
+int device_path_make_major_minor(mode_t mode, dev_t devno, char **ret) {
+        const char *t;
+
+        /* Generates the /dev/{char|block}/MAJOR:MINOR path for a dev_t */
+
+        if (S_ISCHR(mode))
+                t = "char";
+        else if (S_ISBLK(mode))
+                t = "block";
+        else
+                return -ENODEV;
+
+        if (asprintf(ret, "/dev/%s/%u:%u", t, major(devno), minor(devno)) < 0)
+                return -ENOMEM;
+
+        return 0;
+
+}
+
+int device_path_make_canonical(mode_t mode, dev_t devno, char **ret) {
+        _cleanup_free_ char *p = NULL;
+        int r;
+
+        /* Finds the canonical path for a device, i.e. resolves the /dev/{char|block}/MAJOR:MINOR path to the end. */
+
+        assert(ret);
+
+        if (major(devno) == 0 && minor(devno) == 0) {
+                char *s;
+
+                /* A special hack to make sure our 'inaccessible' device nodes work. They won't have symlinks in
+                 * /dev/block/ and /dev/char/, hence we handle them specially here. */
+
+                if (S_ISCHR(mode))
+                        s = strdup("/run/systemd/inaccessible/chr");
+                else if (S_ISBLK(mode))
+                        s = strdup("/run/systemd/inaccessible/blk");
+                else
+                        return -ENODEV;
+
+                if (!s)
+                        return -ENOMEM;
+
+                *ret = s;
+                return 0;
+        }
+
+        r = device_path_make_major_minor(mode, devno, &p);
+        if (r < 0)
+                return r;
+
+        return chase_symlinks(p, NULL, 0, ret);
+}
+
+int device_path_parse_major_minor(const char *path, mode_t *ret_mode, dev_t *ret_devno) {
+        mode_t mode;
+        dev_t devno;
+        int r;
+
+        /* Tries to extract the major/minor directly from the device path if we can. Handles /dev/block/ and /dev/char/
+         * paths, as well out synthetic inaccessible device nodes. Never goes to disk. Returns -ENODEV if the device
+         * path cannot be parsed like this.  */
+
+        if (path_equal(path, "/run/systemd/inaccessible/chr")) {
+                mode = S_IFCHR;
+                devno = makedev(0, 0);
+        } else if (path_equal(path, "/run/systemd/inaccessible/blk")) {
+                mode = S_IFBLK;
+                devno = makedev(0, 0);
+        } else {
+                const char *w;
+
+                w = path_startswith(path, "/dev/block/");
+                if (w)
+                        mode = S_IFBLK;
+                else {
+                        w = path_startswith(path, "/dev/char/");
+                        if (!w)
+                                return -ENODEV;
+
+                        mode = S_IFCHR;
+                }
+
+                r = parse_dev(w, &devno);
+                if (r < 0)
+                        return r;
+        }
+
+        if (ret_mode)
+                *ret_mode = mode;
+        if (ret_devno)
+                *ret_devno = devno;
+
+        return 0;
+}
+#endif /* NM_IGNORED */
diff --git a/src/systemd/src/basic/stat-util.h b/src/systemd/src/basic/stat-util.h
index 1a725f1da0..0a08e642b5 100644
--- a/src/systemd/src/basic/stat-util.h
+++ b/src/systemd/src/basic/stat-util.h
@@ -59,3 +59,29 @@ int path_is_temporary_fs(const char *path);
 
 int stat_verify_regular(const struct stat *st);
 int fd_verify_regular(int fd);
+
+int stat_verify_directory(const struct stat *st);
+int fd_verify_directory(int fd);
+
+/* glibc and the Linux kernel have different ideas about the major/minor size. These calls will check whether the
+ * specified major is valid by the Linux kernel's standards, not by glibc's. Linux has 20bits of minor, and 12 bits of
+ * major space. See MINORBITS in linux/kdev_t.h in the kernel sources. (If you wonder why we define _y here, instead of
+ * comparing directly >= 0: it's to trick out -Wtype-limits, which would otherwise complain if the type is unsigned, as
+ * such a test would be pointless in such a case.) */
+
+#define DEVICE_MAJOR_VALID(x)                                           \
+        ({                                                              \
+                typeof(x) _x = (x), _y = 0;                             \
+                _x >= _y && _x < (UINT32_C(1) << 12);                   \
+                                                                        \
+        })
+
+#define DEVICE_MINOR_VALID(x)                                           \
+        ({                                                              \
+                typeof(x) _x = (x), _y = 0;                             \
+                _x >= _y && _x < (UINT32_C(1) << 20);                   \
+        })
+
+int device_path_make_major_minor(mode_t mode, dev_t devno, char **ret);
+int device_path_make_canonical(mode_t mode, dev_t devno, char **ret);
+int device_path_parse_major_minor(const char *path, mode_t *ret_mode, dev_t *ret_devno);
diff --git a/src/systemd/src/basic/strv.h b/src/systemd/src/basic/strv.h
index 5f1803d87d..aa4cd4aaca 100644
--- a/src/systemd/src/basic/strv.h
+++ b/src/systemd/src/basic/strv.h
@@ -144,6 +144,18 @@ void strv_print(char **l);
                 _x && strv_contains(STRV_MAKE(__VA_ARGS__), _x); \
         })
 
+#define STARTSWITH_SET(p, ...)                                  \
+        ({                                                      \
+                const char *_p = (p);                           \
+                char  *_found = NULL, **_i;                     \
+                STRV_FOREACH(_i, STRV_MAKE(__VA_ARGS__)) {      \
+                        _found = startswith(_p, *_i);           \
+                        if (_found)                             \
+                                break;                          \
+                }                                               \
+                _found;                                         \
+        })
+
 #define FOREACH_STRING(x, ...)                               \
         for (char **_l = ({                                  \
                 char **_ll = STRV_MAKE(__VA_ARGS__);         \
diff --git a/src/systemd/src/basic/time-util.c b/src/systemd/src/basic/time-util.c
index 3465932f89..a2f616d148 100644
--- a/src/systemd/src/basic/time-util.c
+++ b/src/systemd/src/basic/time-util.c
@@ -22,6 +22,7 @@
 #include "io-util.h"
 #include "log.h"
 #include "macro.h"
+#include "missing_timerfd.h"
 #include "parse-util.h"
 #include "path-util.h"
 #include "process-util.h"
@@ -1391,9 +1392,7 @@ int get_timezone(char **tz) {
         if (r < 0)
                 return r; /* returns EINVAL if not a symlink */
 
-        e = path_startswith(t, "/usr/share/zoneinfo/");
-        if (!e)
-                e = path_startswith(t, "../usr/share/zoneinfo/");
+        e = PATH_STARTSWITH_SET(t, "/usr/share/zoneinfo/", "../usr/share/zoneinfo/");
         if (!e)
                 return -EINVAL;
 
diff --git a/src/systemd/src/basic/tmpfile-util.c b/src/systemd/src/basic/tmpfile-util.c
new file mode 100644
index 0000000000..b40da5dc8d
--- /dev/null
+++ b/src/systemd/src/basic/tmpfile-util.c
@@ -0,0 +1,335 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include "nm-sd-adapt.h"
+
+#include <sys/mman.h>
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "fs-util.h"
+#include "hexdecoct.h"
+#include "macro.h"
+#include "memfd-util.h"
+#include "missing_syscall.h"
+#include "path-util.h"
+#include "process-util.h"
+#include "random-util.h"
+#include "stdio-util.h"
+#include "string-util.h"
+#include "tmpfile-util.h"
+#include "umask-util.h"
+
+int fopen_temporary(const char *path, FILE **_f, char **_temp_path) {
+        FILE *f;
+        char *t;
+        int r, fd;
+
+        assert(path);
+        assert(_f);
+        assert(_temp_path);
+
+        r = tempfn_xxxxxx(path, NULL, &t);
+        if (r < 0)
+                return r;
+
+        fd = mkostemp_safe(t);
+        if (fd < 0) {
+                free(t);
+                return -errno;
+        }
+
+        f = fdopen(fd, "w");
+        if (!f) {
+                unlink_noerrno(t);
+                free(t);
+                safe_close(fd);
+                return -errno;
+        }
+
+        *_f = f;
+        *_temp_path = t;
+
+        return 0;
+}
+
+/* This is much like mkostemp() but is subject to umask(). */
+int mkostemp_safe(char *pattern) {
+        _cleanup_umask_ mode_t u = 0;
+        int fd;
+
+        assert(pattern);
+
+        u = umask(077);
+
+        fd = mkostemp(pattern, O_CLOEXEC);
+        if (fd < 0)
+                return -errno;
+
+        return fd;
+}
+
+#if 0 /* NM_IGNORED */
+int fmkostemp_safe(char *pattern, const char *mode, FILE **ret_f) {
+        int fd;
+        FILE *f;
+
+        fd = mkostemp_safe(pattern);
+        if (fd < 0)
+                return fd;
+
+        f = fdopen(fd, mode);
+        if (!f) {
+                safe_close(fd);
+                return -errno;
+        }
+
+        *ret_f = f;
+        return 0;
+}
+#endif /* NM_IGNORED */
+
+int tempfn_xxxxxx(const char *p, const char *extra, char **ret) {
+        const char *fn;
+        char *t;
+
+        assert(ret);
+
+        if (isempty(p))
+                return -EINVAL;
+        if (path_equal(p, "/"))
+                return -EINVAL;
+
+        /*
+         * Turns this:
+         *         /foo/bar/waldo
+         *
+         * Into this:
+         *         /foo/bar/.#<extra>waldoXXXXXX
+         */
+
+        fn = basename(p);
+        if (!filename_is_valid(fn))
+                return -EINVAL;
+
+        extra = strempty(extra);
+
+        t = new(char, strlen(p) + 2 + strlen(extra) + 6 + 1);
+        if (!t)
+                return -ENOMEM;
+
+        strcpy(stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn), "XXXXXX");
+
+        *ret = path_simplify(t, false);
+        return 0;
+}
+
+#if 0 /* NM_IGNORED */
+int tempfn_random(const char *p, const char *extra, char **ret) {
+        const char *fn;
+        char *t, *x;
+        uint64_t u;
+        unsigned i;
+
+        assert(ret);
+
+        if (isempty(p))
+                return -EINVAL;
+        if (path_equal(p, "/"))
+                return -EINVAL;
+
+        /*
+         * Turns this:
+         *         /foo/bar/waldo
+         *
+         * Into this:
+         *         /foo/bar/.#<extra>waldobaa2a261115984a9
+         */
+
+        fn = basename(p);
+        if (!filename_is_valid(fn))
+                return -EINVAL;
+
+        extra = strempty(extra);
+
+        t = new(char, strlen(p) + 2 + strlen(extra) + 16 + 1);
+        if (!t)
+                return -ENOMEM;
+
+        x = stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn);
+
+        u = random_u64();
+        for (i = 0; i < 16; i++) {
+                *(x++) = hexchar(u & 0xF);
+                u >>= 4;
+        }
+
+        *x = 0;
+
+        *ret = path_simplify(t, false);
+        return 0;
+}
+
+int tempfn_random_child(const char *p, const char *extra, char **ret) {
+        char *t, *x;
+        uint64_t u;
+        unsigned i;
+        int r;
+
+        assert(ret);
+
+        /* Turns this:
+         *         /foo/bar/waldo
+         * Into this:
+         *         /foo/bar/waldo/.#<extra>3c2b6219aa75d7d0
+         */
+
+        if (!p) {
+                r = tmp_dir(&p);
+                if (r < 0)
+                        return r;
+        }
+
+        extra = strempty(extra);
+
+        t = new(char, strlen(p) + 3 + strlen(extra) + 16 + 1);
+        if (!t)
+                return -ENOMEM;
+
+        if (isempty(p))
+                x = stpcpy(stpcpy(t, ".#"), extra);
+        else
+                x = stpcpy(stpcpy(stpcpy(t, p), "/.#"), extra);
+
+        u = random_u64();
+        for (i = 0; i < 16; i++) {
+                *(x++) = hexchar(u & 0xF);
+                u >>= 4;
+        }
+
+        *x = 0;
+
+        *ret = path_simplify(t, false);
+        return 0;
+}
+
+int open_tmpfile_unlinkable(const char *directory, int flags) {
+        char *p;
+        int fd, r;
+
+        if (!directory) {
+                r = tmp_dir(&directory);
+                if (r < 0)
+                        return r;
+        } else if (isempty(directory))
+                return -EINVAL;
+
+        /* Returns an unlinked temporary file that cannot be linked into the file system anymore */
+
+        /* Try O_TMPFILE first, if it is supported */
+        fd = open(directory, flags|O_TMPFILE|O_EXCL, S_IRUSR|S_IWUSR);
+        if (fd >= 0)
+                return fd;
+
+        /* Fall back to unguessable name + unlinking */
+        p = strjoina(directory, "/systemd-tmp-XXXXXX");
+
+        fd = mkostemp_safe(p);
+        if (fd < 0)
+                return fd;
+
+        (void) unlink(p);
+
+        return fd;
+}
+
+int open_tmpfile_linkable(const char *target, int flags, char **ret_path) {
+        _cleanup_free_ char *tmp = NULL;
+        int r, fd;
+
+        assert(target);
+        assert(ret_path);
+
+        /* Don't allow O_EXCL, as that has a special meaning for O_TMPFILE */
+        assert((flags & O_EXCL) == 0);
+
+        /* Creates a temporary file, that shall be renamed to "target" later. If possible, this uses O_TMPFILE – in
+         * which case "ret_path" will be returned as NULL. If not possible a the tempoary path name used is returned in
+         * "ret_path". Use link_tmpfile() below to rename the result after writing the file in full. */
+
+        fd = open_parent(target, O_TMPFILE|flags, 0640);
+        if (fd >= 0) {
+                *ret_path = NULL;
+                return fd;
+        }
+
+        log_debug_errno(fd, "Failed to use O_TMPFILE for %s: %m", target);
+
+        r = tempfn_random(target, NULL, &tmp);
+        if (r < 0)
+                return r;
+
+        fd = open(tmp, O_CREAT|O_EXCL|O_NOFOLLOW|O_NOCTTY|flags, 0640);
+        if (fd < 0)
+                return -errno;
+
+        *ret_path = TAKE_PTR(tmp);
+
+        return fd;
+}
+
+int link_tmpfile(int fd, const char *path, const char *target) {
+        int r;
+
+        assert(fd >= 0);
+        assert(target);
+
+        /* Moves a temporary file created with open_tmpfile() above into its final place. if "path" is NULL an fd
+         * created with O_TMPFILE is assumed, and linkat() is used. Otherwise it is assumed O_TMPFILE is not supported
+         * on the directory, and renameat2() is used instead.
+         *
+         * Note that in both cases we will not replace existing files. This is because linkat() does not support this
+         * operation currently (renameat2() does), and there is no nice way to emulate this. */
+
+        if (path) {
+                r = rename_noreplace(AT_FDCWD, path, AT_FDCWD, target);
+                if (r < 0)
+                        return r;
+        } else {
+                char proc_fd_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(fd) + 1];
+
+                xsprintf(proc_fd_path, "/proc/self/fd/%i", fd);
+
+                if (linkat(AT_FDCWD, proc_fd_path, AT_FDCWD, target, AT_SYMLINK_FOLLOW) < 0)
+                        return -errno;
+        }
+
+        return 0;
+}
+
+int mkdtemp_malloc(const char *template, char **ret) {
+        _cleanup_free_ char *p = NULL;
+        int r;
+
+        assert(ret);
+
+        if (template)
+                p = strdup(template);
+        else {
+                const char *tmp;
+
+                r = tmp_dir(&tmp);
+                if (r < 0)
+                        return r;
+
+                p = strjoin(tmp, "/XXXXXX");
+        }
+        if (!p)
+                return -ENOMEM;
+
+        if (!mkdtemp(p))
+                return -errno;
+
+        *ret = TAKE_PTR(p);
+        return 0;
+}
+#endif /* NM_IGNORED */
diff --git a/src/systemd/src/basic/tmpfile-util.h b/src/systemd/src/basic/tmpfile-util.h
new file mode 100644
index 0000000000..802c85d6d9
--- /dev/null
+++ b/src/systemd/src/basic/tmpfile-util.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+#pragma once
+
+#include <stdio.h>
+
+int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
+int mkostemp_safe(char *pattern);
+int fmkostemp_safe(char *pattern, const char *mode, FILE**_f);
+
+int tempfn_xxxxxx(const char *p, const char *extra, char **ret);
+int tempfn_random(const char *p, const char *extra, char **ret);
+int tempfn_random_child(const char *p, const char *extra, char **ret);
+
+int open_tmpfile_unlinkable(const char *directory, int flags);
+int open_tmpfile_linkable(const char *target, int flags, char **ret_path);
+
+int link_tmpfile(int fd, const char *path, const char *target);
+
+int mkdtemp_malloc(const char *template, char **ret);
diff --git a/src/systemd/src/basic/utf8.h b/src/systemd/src/basic/utf8.h
index 628680ef53..eedfebe39c 100644
--- a/src/systemd/src/basic/utf8.h
+++ b/src/systemd/src/basic/utf8.h
@@ -9,7 +9,7 @@
 #endif /* NM_IGNORED */
 
 #include "macro.h"
-#include "missing.h"
+#include "missing_type.h"
 
 #define UTF8_REPLACEMENT_CHARACTER "\xef\xbf\xbd"
 #define UTF8_BYTE_ORDER_MARK "\xef\xbb\xbf"
diff --git a/src/systemd/src/basic/util.c b/src/systemd/src/basic/util.c
index ae8f0cad7c..382e95a072 100644
--- a/src/systemd/src/basic/util.c
+++ b/src/systemd/src/basic/util.c
@@ -25,6 +25,7 @@
 #include "def.h"
 #include "device-nodes.h"
 #include "dirent-util.h"
+#include "env-file.h"
 #include "env-util.h"
 #include "fd-util.h"
 #include "fileio.h"
diff --git a/src/systemd/src/basic/util.h b/src/systemd/src/basic/util.h
index 2f3d1eeab8..f009d37d4c 100644
--- a/src/systemd/src/basic/util.h
+++ b/src/systemd/src/basic/util.h
@@ -25,7 +25,6 @@
 
 #include "format-util.h"
 #include "macro.h"
-#include "missing.h"
 #include "time-util.h"
 
 size_t page_size(void) _pure_;
@@ -148,6 +147,12 @@ static inline int memcmp_safe(const void *s1, const void *s2, size_t n) {
         return memcmp(s1, s2, n);
 }
 
+/* Compare s1 (length n1) with s2 (length n2) in lexicographic order. */
+static inline int memcmp_nn(const void *s1, size_t n1, const void *s2, size_t n2) {
+        return memcmp_safe(s1, s2, MIN(n1, n2))
+            ?: CMP(n1, n2);
+}
+
 int on_ac_power(void);
 
 #define memzero(x,l)                                            \
@@ -173,7 +178,7 @@ static inline void _reset_errno_(int *saved_errno) {
 }
 
 #define PROTECT_ERRNO                                                   \
-        _cleanup_(_reset_errno_) __attribute__((__unused__)) int _saved_errno_ = errno
+        _cleanup_(_reset_errno_) _unused_ int _saved_errno_ = errno
 
 static inline int negative_errno(void) {
         /* This helper should be used to shut up gcc if you know 'errno' is
@@ -194,7 +199,7 @@ static inline unsigned u64log2(uint64_t n) {
 
 static inline unsigned u32ctz(uint32_t n) {
 #if __SIZEOF_INT__ == 4
-        return __builtin_ctz(n);
+        return n != 0 ? __builtin_ctz(n) : 32;
 #else
 #error "Wut?"
 #endif
diff --git a/src/systemd/src/libsystemd-network/lldp-neighbor.c b/src/systemd/src/libsystemd-network/lldp-neighbor.c
index e58045d6e9..c2627bbe6e 100644
--- a/src/systemd/src/libsystemd-network/lldp-neighbor.c
+++ b/src/systemd/src/libsystemd-network/lldp-neighbor.c
@@ -9,11 +9,11 @@
 #include "in-addr-util.h"
 #include "lldp-internal.h"
 #include "lldp-neighbor.h"
+#include "missing.h"
 #include "unaligned.h"
+#include "util.h"
 
-static void lldp_neighbor_id_hash_func(const void *p, struct siphash *state) {
-        const LLDPNeighborID *id = p;
-
+static void lldp_neighbor_id_hash_func(const LLDPNeighborID *id, struct siphash *state) {
         siphash24_compress(id->chassis_id, id->chassis_id_size, state);
         siphash24_compress(&id->chassis_id_size, sizeof(id->chassis_id_size), state);
         siphash24_compress(id->port_id, id->port_id_size, state);
@@ -21,27 +21,12 @@ static void lldp_neighbor_id_hash_func(const void *p, struct siphash *state) {
 }
 
 int lldp_neighbor_id_compare_func(const LLDPNeighborID *x, const LLDPNeighborID *y) {
-        int r;
-
-        r = memcmp(x->chassis_id, y->chassis_id, MIN(x->chassis_id_size, y->chassis_id_size));
-        if (r != 0)
-                return r;
-
-        r = CMP(x->chassis_id_size, y->chassis_id_size);
-        if (r != 0)
-                return r;
-
-        r = memcmp(x->port_id, y->port_id, MIN(x->port_id_size, y->port_id_size));
-        if (r != 0)
-                return r;
-
-        return CMP(x->port_id_size, y->port_id_size);
+        return memcmp_nn(x->chassis_id, x->chassis_id_size, y->chassis_id, y->chassis_id_size)
+            ?: memcmp_nn(x->port_id, x->port_id_size, y->port_id, y->port_id_size);
 }
 
-const struct hash_ops lldp_neighbor_id_hash_ops = {
-        .hash = lldp_neighbor_id_hash_func,
-        .compare = (__compar_fn_t) lldp_neighbor_id_compare_func,
-};
+DEFINE_HASH_OPS_WITH_VALUE_DESTRUCTOR(lldp_neighbor_hash_ops, LLDPNeighborID, lldp_neighbor_id_hash_func, lldp_neighbor_id_compare_func,
+                                      sd_lldp_neighbor, lldp_neighbor_unlink);
 
 int lldp_neighbor_prioq_compare_func(const void *a, const void *b) {
         const sd_lldp_neighbor *x = a, *y = b;
@@ -99,7 +84,12 @@ sd_lldp_neighbor *lldp_neighbor_unlink(sd_lldp_neighbor *n) {
         if (!n->lldp)
                 return NULL;
 
-        assert_se(hashmap_remove(n->lldp->neighbor_by_id, &n->id) == n);
+        /* Only remove the neighbor object from the hash table if it's in there, don't complain if it isn't. This is
+         * because we are used as destructor call for hashmap_clear() and thus sometimes are called to de-register
+         * ourselves from the hashtable and sometimes are called after we already are de-registered. */
+
+        (void) hashmap_remove_value(n->lldp->neighbor_by_id, &n->id, n);
+
         assert_se(prioq_remove(n->lldp->neighbor_by_expiry, n, &n->prioq_idx) >= 0);
 
         n->lldp = NULL;
diff --git a/src/systemd/src/libsystemd-network/lldp-neighbor.h b/src/systemd/src/libsystemd-network/lldp-neighbor.h
index 2241c3bd9d..62dbff42ca 100644
--- a/src/systemd/src/libsystemd-network/lldp-neighbor.h
+++ b/src/systemd/src/libsystemd-network/lldp-neighbor.h
@@ -80,7 +80,7 @@ static inline void* LLDP_NEIGHBOR_TLV_DATA(const sd_lldp_neighbor *n) {
         return ((uint8_t*) LLDP_NEIGHBOR_RAW(n)) + n->rindex + 2;
 }
 
-extern const struct hash_ops lldp_neighbor_id_hash_ops;
+extern const struct hash_ops lldp_neighbor_hash_ops;
 int lldp_neighbor_id_compare_func(const LLDPNeighborID *x, const LLDPNeighborID *y);
 int lldp_neighbor_prioq_compare_func(const void *a, const void *b);
 
diff --git a/src/systemd/src/libsystemd-network/lldp-network.c b/src/systemd/src/libsystemd-network/lldp-network.c
index db779aaa81..c2af0368c1 100644
--- a/src/systemd/src/libsystemd-network/lldp-network.c
+++ b/src/systemd/src/libsystemd-network/lldp-network.c
@@ -7,6 +7,7 @@
 
 #include "fd-util.h"
 #include "lldp-network.h"
+#include "missing.h"
 #include "socket-util.h"
 
 int lldp_network_bind_raw_socket(int ifindex) {
diff --git a/src/systemd/src/libsystemd-network/network-internal.c b/src/systemd/src/libsystemd-network/network-internal.c
index b2461b99e4..520f0783c3 100644
--- a/src/systemd/src/libsystemd-network/network-internal.c
+++ b/src/systemd/src/libsystemd-network/network-internal.c
@@ -374,36 +374,6 @@ int config_parse_hwaddrs(const char *unit,
         return 0;
 }
 
-int config_parse_iaid(const char *unit,
-                      const char *filename,
-                      unsigned line,
-                      const char *section,
-                      unsigned section_line,
-                      const char *lvalue,
-                      int ltype,
-                      const char *rvalue,
-                      void *data,
-                      void *userdata) {
-        uint32_t iaid;
-        int r;
-
-        assert(filename);
-        assert(lvalue);
-        assert(rvalue);
-        assert(data);
-
-        r = safe_atou32(rvalue, &iaid);
-        if (r < 0) {
-                log_syntax(unit, LOG_ERR, filename, line, r,
-                           "Unable to read IAID, ignoring assignment: %s", rvalue);
-                return 0;
-        }
-
-        *((uint32_t *)data) = iaid;
-
-        return 0;
-}
-
 int config_parse_bridge_port_priority(
                 const char *unit,
                 const char *filename,
diff --git a/src/systemd/src/libsystemd-network/network-internal.h b/src/systemd/src/libsystemd-network/network-internal.h
index 06d6118448..dfe4c4244b 100644
--- a/src/systemd/src/libsystemd-network/network-internal.h
+++ b/src/systemd/src/libsystemd-network/network-internal.h
@@ -36,7 +36,6 @@ CONFIG_PARSER_PROTOTYPE(config_parse_hwaddr);
 CONFIG_PARSER_PROTOTYPE(config_parse_hwaddrs);
 CONFIG_PARSER_PROTOTYPE(config_parse_ifnames);
 CONFIG_PARSER_PROTOTYPE(config_parse_ifalias);
-CONFIG_PARSER_PROTOTYPE(config_parse_iaid);
 CONFIG_PARSER_PROTOTYPE(config_parse_bridge_port_priority);
 
 int net_get_unique_predictable_data(sd_device *device, uint64_t *result);
diff --git a/src/systemd/src/libsystemd-network/sd-dhcp-client.c b/src/systemd/src/libsystemd-network/sd-dhcp-client.c
index 6ca6bcab53..aac24767c8 100644
--- a/src/systemd/src/libsystemd-network/sd-dhcp-client.c
+++ b/src/systemd/src/libsystemd-network/sd-dhcp-client.c
@@ -25,10 +25,11 @@
 #include "dns-domain.h"
 #include "event-util.h"
 #include "hostname-util.h"
+#include "io-util.h"
 #include "random-util.h"
 #include "string-util.h"
-#include "util.h"
 #include "strv.h"
+#include "util.h"
 
 #define MAX_CLIENT_ID_LEN (sizeof(uint32_t) + MAX_DUID_LEN)  /* Arbitrary limit */
 #define MAX_MAC_ADDR_LEN CONST_MAX(INFINIBAND_ALEN, ETH_ALEN)
@@ -343,8 +344,9 @@ int sd_dhcp_client_set_client_id(
  */
 static int dhcp_client_set_iaid_duid_internal(
                 sd_dhcp_client *client,
+                bool iaid_append,
+                bool iaid_set,
                 uint32_t iaid,
-                bool append_iaid,
                 uint16_t duid_type,
                 const void *duid,
                 size_t duid_len,
@@ -366,17 +368,17 @@ static int dhcp_client_set_iaid_duid_internal(
         zero(client->client_id);
         client->client_id.type = 255;
 
-        if (append_iaid) {
-                /* If IAID is not configured, generate it. */
-                if (iaid == 0) {
+        if (iaid_append) {
+                if (iaid_set)
+                        client->client_id.ns.iaid = htobe32(iaid);
+                else {
                         r = dhcp_identifier_set_iaid(client->ifindex, client->mac_addr,
                                                      client->mac_addr_len,
                                                      true,
                                                      &client->client_id.ns.iaid);
                         if (r < 0)
                                 return r;
-                } else
-                        client->client_id.ns.iaid = htobe32(iaid);
+                }
         }
 
         if (duid != NULL) {
@@ -416,10 +418,10 @@ static int dhcp_client_set_iaid_duid_internal(
                 }
 
         client->client_id_len = sizeof(client->client_id.type) + len +
-                                (append_iaid ? sizeof(client->client_id.ns.iaid) : 0);
+                                (iaid_append ? sizeof(client->client_id.ns.iaid) : 0);
 
         if (!IN_SET(client->state, DHCP_STATE_INIT, DHCP_STATE_STOPPED)) {
-                log_dhcp_client(client, "Configured %sDUID, restarting.", append_iaid ? "IAID+" : "");
+                log_dhcp_client(client, "Configured %sDUID, restarting.", iaid_append ? "IAID+" : "");
                 client_stop(client, SD_DHCP_CLIENT_EVENT_STOP);
                 sd_dhcp_client_start(client);
         }
@@ -429,18 +431,20 @@ static int dhcp_client_set_iaid_duid_internal(
 
 int sd_dhcp_client_set_iaid_duid(
                 sd_dhcp_client *client,
+                bool iaid_set,
                 uint32_t iaid,
                 uint16_t duid_type,
                 const void *duid,
                 size_t duid_len) {
-        return dhcp_client_set_iaid_duid_internal(client, iaid, true, duid_type, duid, duid_len, 0);
+        return dhcp_client_set_iaid_duid_internal(client, true, iaid_set, iaid, duid_type, duid, duid_len, 0);
 }
 
 int sd_dhcp_client_set_iaid_duid_llt(
                 sd_dhcp_client *client,
+                bool iaid_set,
                 uint32_t iaid,
                 usec_t llt_time) {
-        return dhcp_client_set_iaid_duid_internal(client, iaid, true, DUID_TYPE_LLT, NULL, 0, llt_time);
+        return dhcp_client_set_iaid_duid_internal(client, true, iaid_set, iaid, DUID_TYPE_LLT, NULL, 0, llt_time);
 }
 
 int sd_dhcp_client_set_duid(
@@ -448,13 +452,13 @@ int sd_dhcp_client_set_duid(
                 uint16_t duid_type,
                 const void *duid,
                 size_t duid_len) {
-        return dhcp_client_set_iaid_duid_internal(client, 0, false, duid_type, duid, duid_len, 0);
+        return dhcp_client_set_iaid_duid_internal(client, false, false, 0, duid_type, duid, duid_len, 0);
 }
 
 int sd_dhcp_client_set_duid_llt(
                 sd_dhcp_client *client,
                 usec_t llt_time) {
-        return dhcp_client_set_iaid_duid_internal(client, 0, false, DUID_TYPE_LLT, NULL, 0, llt_time);
+        return dhcp_client_set_iaid_duid_internal(client, false, false, 0, DUID_TYPE_LLT, NULL, 0, llt_time);
 }
 #endif /* NM_IGNORED */
 
@@ -1784,8 +1788,7 @@ static int client_receive_message_raw(
         if (!packet)
                 return -ENOMEM;
 
-        iov.iov_base = packet;
-        iov.iov_len = buflen;
+        iov = IOVEC_MAKE(packet, buflen);
 
         len = recvmsg(fd, &msg, 0);
         if (len < 0) {
diff --git a/src/systemd/src/libsystemd-network/sd-dhcp-lease.c b/src/systemd/src/libsystemd-network/sd-dhcp-lease.c
index b953efc3df..b95ad0c978 100644
--- a/src/systemd/src/libsystemd-network/sd-dhcp-lease.c
+++ b/src/systemd/src/libsystemd-network/sd-dhcp-lease.c
@@ -18,6 +18,7 @@
 #include "dhcp-lease-internal.h"
 #include "dhcp-protocol.h"
 #include "dns-domain.h"
+#include "env-file.h"
 #include "fd-util.h"
 #include "fileio.h"
 #include "hexdecoct.h"
@@ -28,6 +29,7 @@
 #include "stdio-util.h"
 #include "string-util.h"
 #include "strv.h"
+#include "tmpfile-util.h"
 #include "unaligned.h"
 
 int sd_dhcp_lease_get_address(sd_dhcp_lease *lease, struct in_addr *addr) {
@@ -355,7 +357,7 @@ static int lease_parse_domain(const uint8_t *option, size_t len, char **ret) {
                 return 0;
         }
 
-        r = dns_name_normalize(name, &normalized);
+        r = dns_name_normalize(name, 0, &normalized);
         if (r < 0)
                 return r;
 
diff --git a/src/systemd/src/libsystemd-network/sd-dhcp6-client.c b/src/systemd/src/libsystemd-network/sd-dhcp6-client.c
index 8c9fb932bc..63b7cf2b71 100644
--- a/src/systemd/src/libsystemd-network/sd-dhcp6-client.c
+++ b/src/systemd/src/libsystemd-network/sd-dhcp6-client.c
@@ -58,7 +58,7 @@ struct sd_dhcp6_client {
         struct sd_dhcp6_lease *lease;
         int fd;
         bool information_request;
-        bool has_iaid;
+        bool iaid_set;
         be16_t *req_opts;
         size_t req_opts_allocated;
         size_t req_opts_len;
@@ -278,7 +278,7 @@ int sd_dhcp6_client_set_iaid(sd_dhcp6_client *client, uint32_t iaid) {
 
         client->ia_na.ia_na.id = htobe32(iaid);
         client->ia_pd.ia_pd.id = htobe32(iaid);
-        client->has_iaid = true;
+        client->iaid_set = true;
 
         return 0;
 }
@@ -802,7 +802,7 @@ static int client_ensure_iaid(sd_dhcp6_client *client) {
 
         assert(client);
 
-        if (client->has_iaid)
+        if (client->iaid_set)
                 return 0;
 
         r = dhcp_identifier_set_iaid(client->ifindex, client->mac_addr, client->mac_addr_len, true, &iaid);
@@ -811,7 +811,7 @@ static int client_ensure_iaid(sd_dhcp6_client *client) {
 
         client->ia_na.ia_na.id = iaid;
         client->ia_pd.ia_pd.id = iaid;
-        client->has_iaid = true;
+        client->iaid_set = true;
 
         return 0;
 }
diff --git a/src/systemd/src/libsystemd-network/sd-lldp.c b/src/systemd/src/libsystemd-network/sd-lldp.c
index 6715f89420..72cb6e8bd5 100644
--- a/src/systemd/src/libsystemd-network/sd-lldp.c
+++ b/src/systemd/src/libsystemd-network/sd-lldp.c
@@ -4,6 +4,7 @@
 
 #include <arpa/inet.h>
 #include <linux/sockios.h>
+#include <sys/ioctl.h>
 
 #include "sd-lldp.h"
 
@@ -29,12 +30,9 @@ static const char * const lldp_event_table[_SD_LLDP_EVENT_MAX] = {
 DEFINE_STRING_TABLE_LOOKUP(lldp_event, sd_lldp_event);
 
 static void lldp_flush_neighbors(sd_lldp *lldp) {
-        sd_lldp_neighbor *n;
-
         assert(lldp);
 
-        while ((n = hashmap_first(lldp->neighbor_by_id)))
-                lldp_neighbor_unlink(n);
+        hashmap_clear(lldp->neighbor_by_id);
 }
 
 static void lldp_callback(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n) {
@@ -377,7 +375,7 @@ _public_ int sd_lldp_new(sd_lldp **ret) {
                 .capability_mask = (uint16_t) -1,
         };
 
-        lldp->neighbor_by_id = hashmap_new(&lldp_neighbor_id_hash_ops);
+        lldp->neighbor_by_id = hashmap_new(&lldp_neighbor_hash_ops);
         if (!lldp->neighbor_by_id)
                 return -ENOMEM;
 
diff --git a/src/systemd/src/libsystemd/sd-event/sd-event.c b/src/systemd/src/libsystemd/sd-event/sd-event.c
index 8e221ceedd..fc8c5148ee 100644
--- a/src/systemd/src/libsystemd/sd-event/sd-event.c
+++ b/src/systemd/src/libsystemd/sd-event/sd-event.c
@@ -1375,8 +1375,7 @@ static int event_make_inotify_data(
         return 1;
 }
 
-static int inode_data_compare(const void *a, const void *b) {
-        const struct inode_data *x = a, *y = b;
+static int inode_data_compare(const struct inode_data *x, const struct inode_data *y) {
         int r;
 
         assert(x);
@@ -1389,19 +1388,14 @@ static int inode_data_compare(const void *a, const void *b) {
         return CMP(x->ino, y->ino);
 }
 
-static void inode_data_hash_func(const void *p, struct siphash *state) {
-        const struct inode_data *d = p;
-
-        assert(p);
+static void inode_data_hash_func(const struct inode_data *d, struct siphash *state) {
+        assert(d);
 
         siphash24_compress(&d->dev, sizeof(d->dev), state);
         siphash24_compress(&d->ino, sizeof(d->ino), state);
 }
 
-const struct hash_ops inode_data_hash_ops = {
-        .hash = inode_data_hash_func,
-        .compare = inode_data_compare
-};
+DEFINE_PRIVATE_HASH_OPS(inode_data_hash_ops, struct inode_data, inode_data_hash_func, inode_data_compare);
 
 static void event_free_inode_data(
                 sd_event *e,
diff --git a/src/systemd/src/libsystemd/sd-id128/id128-util.c b/src/systemd/src/libsystemd/sd-id128/id128-util.c
index d4d668e885..1e654f0ea4 100644
--- a/src/systemd/src/libsystemd/sd-id128/id128-util.c
+++ b/src/systemd/src/libsystemd/sd-id128/id128-util.c
@@ -187,16 +187,13 @@ int id128_write(const char *p, Id128Format f, sd_id128_t id, bool do_sync) {
         return id128_write_fd(fd, f, id, do_sync);
 }
 
-void id128_hash_func(const void *p, struct siphash *state) {
-        siphash24_compress(p, 16, state);
+void id128_hash_func(const sd_id128_t *p, struct siphash *state) {
+        siphash24_compress(p, sizeof(sd_id128_t), state);
 }
 
-int id128_compare_func(const void *a, const void *b) {
+int id128_compare_func(const sd_id128_t *a, const sd_id128_t *b) {
         return memcmp(a, b, 16);
 }
 
-const struct hash_ops id128_hash_ops = {
-        .hash = id128_hash_func,
-        .compare = id128_compare_func,
-};
+DEFINE_HASH_OPS(id128_hash_ops, sd_id128_t, id128_hash_func, id128_compare_func);
 #endif /* NM_IGNORED */
diff --git a/src/systemd/src/libsystemd/sd-id128/id128-util.h b/src/systemd/src/libsystemd/sd-id128/id128-util.h
index 44f159c0b6..65f14ab252 100644
--- a/src/systemd/src/libsystemd/sd-id128/id128-util.h
+++ b/src/systemd/src/libsystemd/sd-id128/id128-util.h
@@ -28,6 +28,6 @@ int id128_read(const char *p, Id128Format f, sd_id128_t *ret);
 int id128_write_fd(int fd, Id128Format f, sd_id128_t id, bool do_sync);
 int id128_write(const char *p, Id128Format f, sd_id128_t id, bool do_sync);
 
-void id128_hash_func(const void *p, struct siphash *state);
-int id128_compare_func(const void *a, const void *b) _pure_;
+void id128_hash_func(const sd_id128_t *p, struct siphash *state);
+int id128_compare_func(const sd_id128_t *a, const sd_id128_t *b) _pure_;
 extern const struct hash_ops id128_hash_ops;
diff --git a/src/systemd/src/shared/dns-domain.c b/src/systemd/src/shared/dns-domain.c
index bede1db6d5..ccf6298eea 100644
--- a/src/systemd/src/shared/dns-domain.c
+++ b/src/systemd/src/shared/dns-domain.c
@@ -21,6 +21,7 @@
 #include "dns-domain.h"
 #include "hashmap.h"
 #include "hexdecoct.h"
+#include "hostname-util.h"
 #include "in-addr-util.h"
 #include "macro.h"
 #include "parse-util.h"
@@ -28,9 +29,9 @@
 #include "strv.h"
 #include "utf8.h"
 
-int dns_label_unescape(const char **name, char *dest, size_t sz) {
+int dns_label_unescape(const char **name, char *dest, size_t sz, DNSLabelFlags flags) {
         const char *n;
-        char *d;
+        char *d, last_char = 0;
         int r = 0;
 
         assert(name);
@@ -40,13 +41,15 @@ int dns_label_unescape(const char **name, char *dest, size_t sz) {
         d = dest;
 
         for (;;) {
-                if (*n == '.') {
-                        n++;
-                        break;
-                }
+                if (*n == 0 || *n == '.') {
+                        if (FLAGS_SET(flags, DNS_LABEL_LDH) && last_char == '-')
+                                /* Trailing dash */
+                                return -EINVAL;
 
-                if (*n == 0)
+                        if (*n == '.')
+                                n++;
                         break;
+                }
 
                 if (r >= DNS_LABEL_MAX)
                         return -EINVAL;
@@ -56,6 +59,8 @@ int dns_label_unescape(const char **name, char *dest, size_t sz) {
 
                 if (*n == '\\') {
                         /* Escaped character */
+                        if (FLAGS_SET(flags, DNS_LABEL_NO_ESCAPES))
+                                return -EINVAL;
 
                         n++;
 
@@ -66,6 +71,10 @@ int dns_label_unescape(const char **name, char *dest, size_t sz) {
                         else if (IN_SET(*n, '\\', '.')) {
                                 /* Escaped backslash or dot */
 
+                                if (FLAGS_SET(flags, DNS_LABEL_LDH))
+                                        return -EINVAL;
+
+                                last_char = *n;
                                 if (d)
                                         *(d++) = *n;
                                 sz--;
@@ -94,6 +103,11 @@ int dns_label_unescape(const char **name, char *dest, size_t sz) {
                                 if (k > 255)
                                         return -EINVAL;
 
+                                if (FLAGS_SET(flags, DNS_LABEL_LDH) &&
+                                    !valid_ldh_char((char) k))
+                                        return -EINVAL;
+
+                                last_char = (char) k;
                                 if (d)
                                         *(d++) = (char) k;
                                 sz--;
@@ -107,6 +121,15 @@ int dns_label_unescape(const char **name, char *dest, size_t sz) {
 
                         /* Normal character */
 
+                        if (FLAGS_SET(flags, DNS_LABEL_LDH)) {
+                                if (!valid_ldh_char(*n))
+                                        return -EINVAL;
+                                if (r == 0 && *n == '-')
+                                        /* Leading dash */
+                                        return -EINVAL;
+                        }
+
+                        last_char = *n;
                         if (d)
                                 *(d++) = *n;
                         sz--;
@@ -189,7 +212,7 @@ int dns_label_unescape_suffix(const char *name, const char **label_terminal, cha
                 terminal--;
         }
 
-        r = dns_label_unescape(&name, dest, sz);
+        r = dns_label_unescape(&name, dest, sz, 0);
         if (r < 0)
                 return r;
 
@@ -386,7 +409,7 @@ int dns_label_undo_idna(const char *encoded, size_t encoded_size, char *decoded,
 #endif
 #endif /* NM_IGNORED */
 
-int dns_name_concat(const char *a, const char *b, char **_ret) {
+int dns_name_concat(const char *a, const char *b, DNSLabelFlags flags, char **_ret) {
         _cleanup_free_ char *ret = NULL;
         size_t n = 0, allocated = 0;
         const char *p;
@@ -403,7 +426,7 @@ int dns_name_concat(const char *a, const char *b, char **_ret) {
         for (;;) {
                 char label[DNS_LABEL_MAX];
 
-                r = dns_label_unescape(&p, label, sizeof(label));
+                r = dns_label_unescape(&p, label, sizeof label, flags);
                 if (r < 0)
                         return r;
                 if (r == 0) {
@@ -469,8 +492,7 @@ finish:
 }
 
 #if 0 /* NM_IGNORED */
-void dns_name_hash_func(const void *s, struct siphash *state) {
-        const char *p = s;
+void dns_name_hash_func(const char *p, struct siphash *state) {
         int r;
 
         assert(p);
@@ -478,7 +500,7 @@ void dns_name_hash_func(const void *s, struct siphash *state) {
         for (;;) {
                 char label[DNS_LABEL_MAX+1];
 
-                r = dns_label_unescape(&p, label, sizeof(label));
+                r = dns_label_unescape(&p, label, sizeof label, 0);
                 if (r < 0)
                         break;
                 if (r == 0)
@@ -493,15 +515,15 @@ void dns_name_hash_func(const void *s, struct siphash *state) {
         string_hash_func("", state);
 }
 
-int dns_name_compare_func(const void *a, const void *b) {
+int dns_name_compare_func(const char *a, const char *b) {
         const char *x, *y;
         int r, q;
 
         assert(a);
         assert(b);
 
-        x = (const char *) a + strlen(a);
-        y = (const char *) b + strlen(b);
+        x = a + strlen(a);
+        y = b + strlen(b);
 
         for (;;) {
                 char la[DNS_LABEL_MAX], lb[DNS_LABEL_MAX];
@@ -520,10 +542,7 @@ int dns_name_compare_func(const void *a, const void *b) {
         }
 }
 
-const struct hash_ops dns_name_hash_ops = {
-        .hash = dns_name_hash_func,
-        .compare = dns_name_compare_func
-};
+DEFINE_HASH_OPS(dns_name_hash_ops, char, dns_name_hash_func, dns_name_compare_func);
 
 int dns_name_equal(const char *x, const char *y) {
         int r, q;
@@ -534,11 +553,11 @@ int dns_name_equal(const char *x, const char *y) {
         for (;;) {
                 char la[DNS_LABEL_MAX], lb[DNS_LABEL_MAX];
 
-                r = dns_label_unescape(&x, la, sizeof(la));
+                r = dns_label_unescape(&x, la, sizeof la, 0);
                 if (r < 0)
                         return r;
 
-                q = dns_label_unescape(&y, lb, sizeof(lb));
+                q = dns_label_unescape(&y, lb, sizeof lb, 0);
                 if (q < 0)
                         return q;
 
@@ -565,14 +584,14 @@ int dns_name_endswith(const char *name, const char *suffix) {
         for (;;) {
                 char ln[DNS_LABEL_MAX], ls[DNS_LABEL_MAX];
 
-                r = dns_label_unescape(&n, ln, sizeof(ln));
+                r = dns_label_unescape(&n, ln, sizeof ln, 0);
                 if (r < 0)
                         return r;
 
                 if (!saved_n)
                         saved_n = n;
 
-                q = dns_label_unescape(&s, ls, sizeof(ls));
+                q = dns_label_unescape(&s, ls, sizeof ls, 0);
                 if (q < 0)
                         return q;
 
@@ -603,13 +622,13 @@ int dns_name_startswith(const char *name, const char *prefix) {
         for (;;) {
                 char ln[DNS_LABEL_MAX], lp[DNS_LABEL_MAX];
 
-                r = dns_label_unescape(&p, lp, sizeof(lp));
+                r = dns_label_unescape(&p, lp, sizeof lp, 0);
                 if (r < 0)
                         return r;
                 if (r == 0)
                         return true;
 
-                q = dns_label_unescape(&n, ln, sizeof(ln));
+                q = dns_label_unescape(&n, ln, sizeof ln, 0);
                 if (q < 0)
                         return q;
 
@@ -638,14 +657,14 @@ int dns_name_change_suffix(const char *name, const char *old_suffix, const char
                 if (!saved_before)
                         saved_before = n;
 
-                r = dns_label_unescape(&n, ln, sizeof(ln));
+                r = dns_label_unescape(&n, ln, sizeof ln, 0);
                 if (r < 0)
                         return r;
 
                 if (!saved_after)
                         saved_after = n;
 
-                q = dns_label_unescape(&s, ls, sizeof(ls));
+                q = dns_label_unescape(&s, ls, sizeof ls, 0);
                 if (q < 0)
                         return q;
 
@@ -668,7 +687,7 @@ int dns_name_change_suffix(const char *name, const char *old_suffix, const char
         /* Found it! Now generate the new name */
         prefix = strndupa(name, saved_before - name);
 
-        r = dns_name_concat(prefix, new_suffix, ret);
+        r = dns_name_concat(prefix, new_suffix, 0, ret);
         if (r < 0)
                 return r;
 
@@ -746,7 +765,7 @@ int dns_name_address(const char *p, int *family, union in_addr_union *address) {
                 for (i = 0; i < ELEMENTSOF(a); i++) {
                         char label[DNS_LABEL_MAX+1];
 
-                        r = dns_label_unescape(&p, label, sizeof(label));
+                        r = dns_label_unescape(&p, label, sizeof label, 0);
                         if (r < 0)
                                 return r;
                         if (r == 0)
@@ -783,7 +802,7 @@ int dns_name_address(const char *p, int *family, union in_addr_union *address) {
                         char label[DNS_LABEL_MAX+1];
                         int x, y;
 
-                        r = dns_label_unescape(&p, label, sizeof(label));
+                        r = dns_label_unescape(&p, label, sizeof label, 0);
                         if (r <= 0)
                                 return r;
                         if (r != 1)
@@ -792,7 +811,7 @@ int dns_name_address(const char *p, int *family, union in_addr_union *address) {
                         if (x < 0)
                                 return -EINVAL;
 
-                        r = dns_label_unescape(&p, label, sizeof(label));
+                        r = dns_label_unescape(&p, label, sizeof label, 0);
                         if (r <= 0)
                                 return r;
                         if (r != 1)
@@ -861,7 +880,7 @@ int dns_name_to_wire_format(const char *domain, uint8_t *buffer, size_t len, boo
                  * dns_label_unescape() returns 0 when it hits the end
                  * of the domain name, which we rely on here to encode
                  * the trailing NUL byte. */
-                r = dns_label_unescape(&domain, (char *) out, len);
+                r = dns_label_unescape(&domain, (char *) out, len, 0);
                 if (r < 0)
                         return r;
 
@@ -929,7 +948,7 @@ bool dns_srv_type_is_valid(const char *name) {
 
                 /* This more or less implements RFC 6335, Section 5.1 */
 
-                r = dns_label_unescape(&name, label, sizeof(label));
+                r = dns_label_unescape(&name, label, sizeof label, 0);
                 if (r < 0)
                         return false;
                 if (r == 0)
@@ -989,7 +1008,7 @@ int dns_service_join(const char *name, const char *type, const char *domain, cha
                 return -EINVAL;
 
         if (!name)
-                return dns_name_concat(type, domain, ret);
+                return dns_name_concat(type, domain, 0, ret);
 
         if (!dns_service_name_is_valid(name))
                 return -EINVAL;
@@ -998,11 +1017,11 @@ int dns_service_join(const char *name, const char *type, const char *domain, cha
         if (r < 0)
                 return r;
 
-        r = dns_name_concat(type, domain, &n);
+        r = dns_name_concat(type, domain, 0, &n);
         if (r < 0)
                 return r;
 
-        return dns_name_concat(escaped, n, ret);
+        return dns_name_concat(escaped, n, 0, ret);
 }
 
 static bool dns_service_name_label_is_valid(const char *label, size_t n) {
@@ -1027,7 +1046,7 @@ int dns_service_split(const char *joined, char **_name, char **_type, char **_do
         assert(joined);
 
         /* Get first label from the full name */
-        an = dns_label_unescape(&p, a, sizeof(a));
+        an = dns_label_unescape(&p, a, sizeof(a), 0);
         if (an < 0)
                 return an;
 
@@ -1035,7 +1054,7 @@ int dns_service_split(const char *joined, char **_name, char **_type, char **_do
                 x++;
 
                 /* If there was a first label, try to get the second one */
-                bn = dns_label_unescape(&p, b, sizeof(b));
+                bn = dns_label_unescape(&p, b, sizeof(b), 0);
                 if (bn < 0)
                         return bn;
 
@@ -1044,7 +1063,7 @@ int dns_service_split(const char *joined, char **_name, char **_type, char **_do
 
                         /* If there was a second label, try to get the third one */
                         q = p;
-                        cn = dns_label_unescape(&p, c, sizeof(c));
+                        cn = dns_label_unescape(&p, c, sizeof(c), 0);
                         if (cn < 0)
                                 return cn;
 
@@ -1094,7 +1113,7 @@ int dns_service_split(const char *joined, char **_name, char **_type, char **_do
         d = joined;
 
 finish:
-        r = dns_name_normalize(d, &domain);
+        r = dns_name_normalize(d, 0, &domain);
         if (r < 0)
                 return r;
 
@@ -1110,7 +1129,7 @@ finish:
         return 0;
 }
 
-static int dns_name_build_suffix_table(const char *name, const char*table[]) {
+static int dns_name_build_suffix_table(const char *name, const char *table[]) {
         const char *p;
         unsigned n = 0;
         int r;
@@ -1239,12 +1258,12 @@ int dns_name_common_suffix(const char *a, const char *b, const char **ret) {
                 }
 
                 x = a_labels[n - 1 - k];
-                r = dns_label_unescape(&x, la, sizeof(la));
+                r = dns_label_unescape(&x, la, sizeof la, 0);
                 if (r < 0)
                         return r;
 
                 y = b_labels[m - 1 - k];
-                q = dns_label_unescape(&y, lb, sizeof(lb));
+                q = dns_label_unescape(&y, lb, sizeof lb, 0);
                 if (q < 0)
                         return q;
 
@@ -1312,13 +1331,13 @@ int dns_name_apply_idna(const char *name, char **ret) {
         for (;;) {
                 char label[DNS_LABEL_MAX];
 
-                r = dns_label_unescape(&name, label, sizeof(label));
+                r = dns_label_unescape(&name, label, sizeof label, 0);
                 if (r < 0)
                         return r;
                 if (r == 0)
                         break;
 
-                q = dns_label_apply_idna(label, r, label, sizeof(label));
+                q = dns_label_apply_idna(label, r, label, sizeof label);
                 if (q < 0)
                         return q;
                 if (q > 0)
diff --git a/src/systemd/src/shared/dns-domain.h b/src/systemd/src/shared/dns-domain.h
index 95f4069cc0..88b3eb112c 100644
--- a/src/systemd/src/shared/dns-domain.h
+++ b/src/systemd/src/shared/dns-domain.h
@@ -24,13 +24,18 @@
 /* Maximum number of labels per valid hostname */
 #define DNS_N_LABELS_MAX 127
 
-int dns_label_unescape(const char **name, char *dest, size_t sz);
+typedef enum DNSLabelFlags {
+        DNS_LABEL_LDH        = 1 << 0, /* Follow the "LDH" rule — only letters, digits, and internal hyphens. */
+        DNS_LABEL_NO_ESCAPES = 1 << 1, /* Do not treat backslashes specially */
+} DNSLabelFlags;
+
+int dns_label_unescape(const char **name, char *dest, size_t sz, DNSLabelFlags flags);
 int dns_label_unescape_suffix(const char *name, const char **label_end, char *dest, size_t sz);
 int dns_label_escape(const char *p, size_t l, char *dest, size_t sz);
 int dns_label_escape_new(const char *p, size_t l, char **ret);
 
 static inline int dns_name_parent(const char **name) {
-        return dns_label_unescape(name, NULL, DNS_LABEL_MAX);
+        return dns_label_unescape(name, NULL, DNS_LABEL_MAX, 0);
 }
 
 #if 0 /* NM_IGNORED */
@@ -40,18 +45,29 @@ int dns_label_undo_idna(const char *encoded, size_t encoded_size, char *decoded,
 #endif
 #endif /* NM_IGNORED */
 
-int dns_name_concat(const char *a, const char *b, char **ret);
+int dns_name_concat(const char *a, const char *b, DNSLabelFlags flags, char **ret);
 
-static inline int dns_name_normalize(const char *s, char **ret) {
+static inline int dns_name_normalize(const char *s, DNSLabelFlags flags, char **ret) {
         /* dns_name_concat() normalizes as a side-effect */
-        return dns_name_concat(s, NULL, ret);
+        return dns_name_concat(s, NULL, flags, ret);
 }
 
 static inline int dns_name_is_valid(const char *s) {
         int r;
 
         /* dns_name_normalize() verifies as a side effect */
-        r = dns_name_normalize(s, NULL);
+        r = dns_name_normalize(s, 0, NULL);
+        if (r == -EINVAL)
+                return 0;
+        if (r < 0)
+                return r;
+        return 1;
+}
+
+static inline int dns_name_is_valid_ldh(const char *s) {
+        int r;
+
+        r = dns_name_concat(s, NULL, DNS_LABEL_LDH|DNS_LABEL_NO_ESCAPES, NULL);
         if (r == -EINVAL)
                 return 0;
         if (r < 0)
@@ -59,8 +75,8 @@ static inline int dns_name_is_valid(const char *s) {
         return 1;
 }
 
-void dns_name_hash_func(const void *s, struct siphash *state);
-int dns_name_compare_func(const void *a, const void *b);
+void dns_name_hash_func(const char *s, struct siphash *state);
+int dns_name_compare_func(const char *a, const char *b);
 extern const struct hash_ops dns_name_hash_ops;
 
 int dns_name_between(const char *a, const char *b, const char *c);
diff --git a/src/systemd/src/systemd/_sd-common.h b/src/systemd/src/systemd/_sd-common.h
index b026b5c551..05c38008cf 100644
--- a/src/systemd/src/systemd/_sd-common.h
+++ b/src/systemd/src/systemd/_sd-common.h
@@ -23,9 +23,11 @@
 #  error "Do not include _sd-common.h directly; it is a private header."
 #endif
 
+typedef void (*_sd_destroy_t)(void *userdata);
+
 #ifndef _sd_printf_
 #  if __GNUC__ >= 4
-#    define _sd_printf_(a,b) __attribute__ ((__format__(printf, a, b)))
+#    define _sd_printf_(a,b) __attribute__((__format__(printf, a, b)))
 #  else
 #    define _sd_printf_(a,b)
 #  endif
diff --git a/src/systemd/src/systemd/sd-dhcp-client.h b/src/systemd/src/systemd/sd-dhcp-client.h
index e388552064..bd0d429df6 100644
--- a/src/systemd/src/systemd/sd-dhcp-client.h
+++ b/src/systemd/src/systemd/sd-dhcp-client.h
@@ -23,6 +23,7 @@
 #include <net/ethernet.h>
 #include <netinet/in.h>
 #include <sys/types.h>
+#include <stdbool.h>
 
 #include "sd-dhcp-lease.h"
 #include "sd-event.h"
@@ -127,12 +128,14 @@ int sd_dhcp_client_set_client_id(
                 size_t data_len);
 int sd_dhcp_client_set_iaid_duid(
                 sd_dhcp_client *client,
+                bool iaid_set,
                 uint32_t iaid,
                 uint16_t duid_type,
                 const void *duid,
                 size_t duid_len);
 int sd_dhcp_client_set_iaid_duid_llt(
                 sd_dhcp_client *client,
+                bool iaid_set,
                 uint32_t iaid,
                 uint64_t llt_time);
 int sd_dhcp_client_set_duid(
diff --git a/src/systemd/src/systemd/sd-event.h b/src/systemd/src/systemd/sd-event.h
index b15cade20a..787a12f241 100644
--- a/src/systemd/src/systemd/sd-event.h
+++ b/src/systemd/src/systemd/sd-event.h
@@ -77,7 +77,7 @@ typedef int (*sd_event_child_handler_t)(sd_event_source *s, const siginfo_t *si,
 typedef void* sd_event_child_handler_t;
 #endif
 typedef int (*sd_event_inotify_handler_t)(sd_event_source *s, const struct inotify_event *event, void *userdata);
-typedef void (*sd_event_destroy_t)(void *userdata);
+typedef _sd_destroy_t sd_event_destroy_t;
 
 int sd_event_default(sd_event **e);
 
diff --git a/src/systemd/src/systemd/sd-id128.h b/src/systemd/src/systemd/sd-id128.h
index 78cf9462b0..f4c05a3683 100644
--- a/src/systemd/src/systemd/sd-id128.h
+++ b/src/systemd/src/systemd/sd-id128.h
@@ -41,19 +41,20 @@ int sd_id128_from_string(const char *s, sd_id128_t *ret);
 int sd_id128_randomize(sd_id128_t *ret);
 
 int sd_id128_get_machine(sd_id128_t *ret);
-int sd_id128_get_machine_app_specific(sd_id128_t app_id, sd_id128_t *ret);
-int sd_id128_get_boot_app_specific(sd_id128_t app_id, sd_id128_t *ret);
 int sd_id128_get_boot(sd_id128_t *ret);
 int sd_id128_get_invocation(sd_id128_t *ret);
 
-#define SD_ID128_MAKE(v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15) \
-        ((const sd_id128_t) { .bytes = { 0x##v0, 0x##v1, 0x##v2, 0x##v3, 0x##v4, 0x##v5, 0x##v6, 0x##v7, \
-                                   0x##v8, 0x##v9, 0x##v10, 0x##v11, 0x##v12, 0x##v13, 0x##v14, 0x##v15 }})
+int sd_id128_get_machine_app_specific(sd_id128_t app_id, sd_id128_t *ret);
+int sd_id128_get_boot_app_specific(sd_id128_t app_id, sd_id128_t *ret);
 
 #define SD_ID128_ARRAY(v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15) \
         { .bytes = { 0x##v0, 0x##v1, 0x##v2, 0x##v3, 0x##v4, 0x##v5, 0x##v6, 0x##v7, \
                      0x##v8, 0x##v9, 0x##v10, 0x##v11, 0x##v12, 0x##v13, 0x##v14, 0x##v15 }}
 
+#define SD_ID128_MAKE(v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15) \
+        ((const sd_id128_t) SD_ID128_ARRAY(v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15))
+
+
 /* Note that SD_ID128_FORMAT_VAL will evaluate the passed argument 16
  * times. It is hence not a good idea to call this macro with an
  * expensive function as parameter or an expression with side
@@ -109,7 +110,12 @@ _sd_pure_ static __inline__ int sd_id128_is_null(sd_id128_t a) {
         return a.qwords[0] == 0 && a.qwords[1] == 0;
 }
 
+_sd_pure_ static __inline__ int sd_id128_is_allf(sd_id128_t a) {
+        return a.qwords[0] == UINT64_C(0xFFFFFFFFFFFFFFFF) && a.qwords[1] == UINT64_C(0xFFFFFFFFFFFFFFFF);
+}
+
 #define SD_ID128_NULL ((const sd_id128_t) { .qwords = { 0, 0 }})
+#define SD_ID128_ALLF ((const sd_id128_t) { .qwords = { UINT64_C(0xFFFFFFFFFFFFFFFF), UINT64_C(0xFFFFFFFFFFFFFFFF) }})
 
 _SD_END_DECLARATIONS;