diff options
| author | Colin Walters <walters@verbum.org> | 2017-10-01 05:20:23 -0700 |
|---|---|---|
| committer | Colin Walters <walters@verbum.org> | 2017-10-01 09:51:14 -0700 |
| commit | dd5fd9c1e558ae5a3916d4c571e1e8c84a9fb098 (patch) | |
| tree | 59122619ba04d4157b482c7bf7178748de263b35 /glnx-missing.h | |
| parent | e30154431d7eea6397e5502b175ba3b50330140f (diff) | |
| download | libglnx-dd5fd9c1e558ae5a3916d4c571e1e8c84a9fb098.tar.gz | |
missing: Sync from latest systemd, add memfd_create()
Planning to use memfd_create() in flatpak and rpm-ostree, which both use
bubblewrap, and want to pass read-only data via file descriptor to the
container. Passing via `O_TMPFILE` requires `O_RDWR` (read and write),
and passing via a pipe would require buffering.
The systemd `missing.h` has grown enormously; I only cherry-picked the bits for
memfd.
Diffstat (limited to 'glnx-missing.h')
| -rw-r--r-- | glnx-missing.h | 54 |
1 files changed, 47 insertions, 7 deletions
diff --git a/glnx-missing.h b/glnx-missing.h index a60705a..0eba07b 100644 --- a/glnx-missing.h +++ b/glnx-missing.h @@ -19,7 +19,17 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ -/* Missing glibc definitions to access certain kernel APIs */ +/* Missing glibc definitions to access certain kernel APIs. + This file is last updated from systemd git: + + commit 71e5200f94b22589922704aa4abdf95d4fe2e528 + Author: Daniel Mack <daniel@zonque.org> + AuthorDate: Tue Oct 18 17:57:10 2016 +0200 + Commit: Lennart Poettering <lennart@poettering.net> + CommitDate: Fri Sep 22 15:24:54 2017 +0200 + + Add abstraction model for BPF programs +*/ #include <errno.h> #include <fcntl.h> @@ -29,22 +39,30 @@ #include <uchar.h> #include <unistd.h> -#if defined(__i386__) || defined(__x86_64__) - -/* The precise definition of __O_TMPFILE is arch specific, so let's - * just define this on x86 where we know the value. */ +/* The precise definition of __O_TMPFILE is arch specific; use the + * values defined by the kernel (note: some are hexa, some are octal, + * duplicated as-is from the kernel definitions): + * - alpha, parisc, sparc: each has a specific value; + * - others: they use the "generic" value. + */ #ifndef __O_TMPFILE +#if defined(__alpha__) +#define __O_TMPFILE 0100000000 +#elif defined(__parisc__) || defined(__hppa__) +#define __O_TMPFILE 0400000000 +#elif defined(__sparc__) || defined(__sparc64__) +#define __O_TMPFILE 0x2000000 +#else #define __O_TMPFILE 020000000 #endif +#endif /* a horrid kludge trying to make sure that this will fail on old kernels */ #ifndef O_TMPFILE #define O_TMPFILE (__O_TMPFILE | O_DIRECTORY) #endif -#endif - #ifndef RENAME_NOREPLACE #define RENAME_NOREPLACE (1 << 0) #endif @@ -52,4 +70,26 @@ #define RENAME_EXCHANGE (1 << 1) #endif +#ifndef F_LINUX_SPECIFIC_BASE +#define F_LINUX_SPECIFIC_BASE 1024 +#endif + +#ifndef F_ADD_SEALS +#define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9) +#define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10) + +#define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */ +#define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */ +#define F_SEAL_GROW 0x0004 /* prevent file from growing */ +#define F_SEAL_WRITE 0x0008 /* prevent writes */ +#endif + +#ifndef MFD_ALLOW_SEALING +#define MFD_ALLOW_SEALING 0x0002U +#endif + +#ifndef MFD_CLOEXEC +#define MFD_CLOEXEC 0x0001U +#endif + #include "glnx-missing-syscall.h" |