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-rw-r--r--cmds-filesystem.c534
1 files changed, 534 insertions, 0 deletions
diff --git a/cmds-filesystem.c b/cmds-filesystem.c
new file mode 100644
index 0000000..f41a72a
--- /dev/null
+++ b/cmds-filesystem.c
@@ -0,0 +1,534 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <uuid/uuid.h>
+#include <ctype.h>
+
+#include "kerncompat.h"
+#include "ctree.h"
+#include "ioctl.h"
+#include "utils.h"
+#include "volumes.h"
+
+#include "version.h"
+
+#include "commands.h"
+
+static const char * const filesystem_cmd_group_usage[] = {
+ "btrfs filesystem [<group>] <command> [<args>]",
+ NULL
+};
+
+static const char * const cmd_df_usage[] = {
+ "btrfs filesystem df <path>",
+ "Show space usage information for a mount point",
+ NULL
+};
+
+static int cmd_df(int argc, char **argv)
+{
+ struct btrfs_ioctl_space_args *sargs, *sargs_orig;
+ u64 count = 0, i;
+ int ret;
+ int fd;
+ int e;
+ char *path;
+
+ if (check_argc_exact(argc, 2))
+ usage(cmd_df_usage);
+
+ path = argv[1];
+
+ fd = open_file_or_dir(path);
+ if (fd < 0) {
+ fprintf(stderr, "ERROR: can't access to '%s'\n", path);
+ return 12;
+ }
+
+ sargs_orig = sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
+ if (!sargs)
+ return -ENOMEM;
+
+ sargs->space_slots = 0;
+ sargs->total_spaces = 0;
+
+ ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
+ e = errno;
+ if (ret) {
+ fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
+ path, strerror(e));
+ close(fd);
+ free(sargs);
+ return ret;
+ }
+ if (!sargs->total_spaces) {
+ close(fd);
+ free(sargs);
+ return 0;
+ }
+
+ count = sargs->total_spaces;
+
+ sargs = realloc(sargs, sizeof(struct btrfs_ioctl_space_args) +
+ (count * sizeof(struct btrfs_ioctl_space_info)));
+ if (!sargs) {
+ close(fd);
+ free(sargs_orig);
+ return -ENOMEM;
+ }
+
+ sargs->space_slots = count;
+ sargs->total_spaces = 0;
+
+ ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
+ e = errno;
+ if (ret) {
+ fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
+ path, strerror(e));
+ close(fd);
+ free(sargs);
+ return ret;
+ }
+
+ for (i = 0; i < sargs->total_spaces; i++) {
+ char description[80];
+ char *total_bytes;
+ char *used_bytes;
+ int written = 0;
+ u64 flags = sargs->spaces[i].flags;
+
+ memset(description, 0, 80);
+
+ if (flags & BTRFS_BLOCK_GROUP_DATA) {
+ if (flags & BTRFS_BLOCK_GROUP_METADATA) {
+ snprintf(description, 14, "%s",
+ "Data+Metadata");
+ written += 13;
+ } else {
+ snprintf(description, 5, "%s", "Data");
+ written += 4;
+ }
+ } else if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
+ snprintf(description, 7, "%s", "System");
+ written += 6;
+ } else if (flags & BTRFS_BLOCK_GROUP_METADATA) {
+ snprintf(description, 9, "%s", "Metadata");
+ written += 8;
+ }
+
+ if (flags & BTRFS_BLOCK_GROUP_RAID0) {
+ snprintf(description+written, 8, "%s", ", RAID0");
+ written += 7;
+ } else if (flags & BTRFS_BLOCK_GROUP_RAID1) {
+ snprintf(description+written, 8, "%s", ", RAID1");
+ written += 7;
+ } else if (flags & BTRFS_BLOCK_GROUP_DUP) {
+ snprintf(description+written, 6, "%s", ", DUP");
+ written += 5;
+ } else if (flags & BTRFS_BLOCK_GROUP_RAID10) {
+ snprintf(description+written, 9, "%s", ", RAID10");
+ written += 8;
+ } else if (flags & BTRFS_BLOCK_GROUP_RAID5) {
+ snprintf(description+written, 9, "%s", ", RAID5");
+ written += 7;
+ } else if (flags & BTRFS_BLOCK_GROUP_RAID6) {
+ snprintf(description+written, 9, "%s", ", RAID6");
+ written += 7;
+ }
+
+ total_bytes = pretty_sizes(sargs->spaces[i].total_bytes);
+ used_bytes = pretty_sizes(sargs->spaces[i].used_bytes);
+ printf("%s: total=%s, used=%s\n", description, total_bytes,
+ used_bytes);
+ }
+ close(fd);
+ free(sargs);
+
+ return 0;
+}
+
+static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
+{
+ char uuidbuf[37];
+ struct list_head *cur;
+ struct btrfs_device *device;
+ int search_len = strlen(search);
+
+ search_len = min(search_len, 37);
+ uuid_unparse(fs_devices->fsid, uuidbuf);
+ if (!strncmp(uuidbuf, search, search_len))
+ return 1;
+
+ list_for_each(cur, &fs_devices->devices) {
+ device = list_entry(cur, struct btrfs_device, dev_list);
+ if ((device->label && strcmp(device->label, search) == 0) ||
+ strcmp(device->name, search) == 0)
+ return 1;
+ }
+ return 0;
+}
+
+static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
+{
+ char uuidbuf[37];
+ struct list_head *cur;
+ struct btrfs_device *device;
+ char *super_bytes_used;
+ u64 devs_found = 0;
+ u64 total;
+
+ uuid_unparse(fs_devices->fsid, uuidbuf);
+ device = list_entry(fs_devices->devices.next, struct btrfs_device,
+ dev_list);
+ if (device->label && device->label[0])
+ printf("Label: '%s' ", device->label);
+ else
+ printf("Label: none ");
+
+ super_bytes_used = pretty_sizes(device->super_bytes_used);
+
+ total = device->total_devs;
+ printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
+ (unsigned long long)total, super_bytes_used);
+
+ free(super_bytes_used);
+
+ list_for_each(cur, &fs_devices->devices) {
+ char *total_bytes;
+ char *bytes_used;
+ device = list_entry(cur, struct btrfs_device, dev_list);
+ total_bytes = pretty_sizes(device->total_bytes);
+ bytes_used = pretty_sizes(device->bytes_used);
+ printf("\tdevid %4llu size %s used %s path %s\n",
+ (unsigned long long)device->devid,
+ total_bytes, bytes_used, device->name);
+ free(total_bytes);
+ free(bytes_used);
+ devs_found++;
+ }
+ if (devs_found < total) {
+ printf("\t*** Some devices missing\n");
+ }
+ printf("\n");
+}
+
+static const char * const cmd_show_usage[] = {
+ "btrfs filesystem show [--all-devices] [<uuid>|<label>]",
+ "Show the structure of a filesystem",
+ "If no argument is given, structure of all present filesystems is shown.",
+ NULL
+};
+
+static int cmd_show(int argc, char **argv)
+{
+ struct list_head *all_uuids;
+ struct btrfs_fs_devices *fs_devices;
+ struct list_head *cur_uuid;
+ char *search = 0;
+ int ret;
+ int checklist = 1;
+ int searchstart = 1;
+
+ if( argc > 1 && !strcmp(argv[1],"--all-devices")){
+ checklist = 0;
+ searchstart += 1;
+ }
+
+ if (check_argc_max(argc, searchstart + 1))
+ usage(cmd_show_usage);
+
+ if(checklist)
+ ret = btrfs_scan_block_devices(0);
+ else
+ ret = btrfs_scan_one_dir("/dev", 0);
+
+ if (ret){
+ fprintf(stderr, "ERROR: error %d while scanning\n", ret);
+ return 18;
+ }
+
+ if(searchstart < argc)
+ search = argv[searchstart];
+
+ all_uuids = btrfs_scanned_uuids();
+ list_for_each(cur_uuid, all_uuids) {
+ fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices,
+ list);
+ if (search && uuid_search(fs_devices, search) == 0)
+ continue;
+ print_one_uuid(fs_devices);
+ }
+ printf("%s\n", BTRFS_BUILD_VERSION);
+ return 0;
+}
+
+static const char * const cmd_sync_usage[] = {
+ "btrfs filesystem sync <path>",
+ "Force a sync on a filesystem",
+ NULL
+};
+
+static int cmd_sync(int argc, char **argv)
+{
+ int fd, res, e;
+ char *path;
+
+ if (check_argc_exact(argc, 2))
+ usage(cmd_sync_usage);
+
+ path = argv[1];
+
+ fd = open_file_or_dir(path);
+ if (fd < 0) {
+ fprintf(stderr, "ERROR: can't access to '%s'\n", path);
+ return 12;
+ }
+
+ printf("FSSync '%s'\n", path);
+ res = ioctl(fd, BTRFS_IOC_SYNC);
+ e = errno;
+ close(fd);
+ if( res < 0 ){
+ fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
+ path, strerror(e));
+ return 16;
+ }
+
+ return 0;
+}
+
+static int parse_compress_type(char *s)
+{
+ if (strcmp(optarg, "zlib") == 0)
+ return BTRFS_COMPRESS_ZLIB;
+ else if (strcmp(optarg, "lzo") == 0)
+ return BTRFS_COMPRESS_LZO;
+ else {
+ fprintf(stderr, "Unknown compress type %s\n", s);
+ exit(1);
+ };
+}
+
+static const char * const cmd_defrag_usage[] = {
+ "btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
+ "Defragment a file or a directory",
+ "",
+ "-v be verbose",
+ "-c[zlib,lzo] compress the file while defragmenting",
+ "-f flush data to disk immediately after defragmenting",
+ "-s start defragment only from byte onward",
+ "-l len defragment only up to len bytes",
+ "-t size minimal size of file to be considered for defragmenting",
+ NULL
+};
+
+static int cmd_defrag(int argc, char **argv)
+{
+ int fd;
+ int flush = 0;
+ u64 start = 0;
+ u64 len = (u64)-1;
+ u32 thresh = 0;
+ int i;
+ int errors = 0;
+ int ret = 0;
+ int verbose = 0;
+ int fancy_ioctl = 0;
+ struct btrfs_ioctl_defrag_range_args range;
+ int e=0;
+ int compress_type = BTRFS_COMPRESS_NONE;
+
+ optind = 1;
+ while(1) {
+ int c = getopt(argc, argv, "vc::fs:l:t:");
+ if (c < 0)
+ break;
+
+ switch(c) {
+ case 'c':
+ compress_type = BTRFS_COMPRESS_ZLIB;
+ if (optarg)
+ compress_type = parse_compress_type(optarg);
+ fancy_ioctl = 1;
+ break;
+ case 'f':
+ flush = 1;
+ fancy_ioctl = 1;
+ break;
+ case 'v':
+ verbose = 1;
+ break;
+ case 's':
+ start = parse_size(optarg);
+ fancy_ioctl = 1;
+ break;
+ case 'l':
+ len = parse_size(optarg);
+ fancy_ioctl = 1;
+ break;
+ case 't':
+ thresh = parse_size(optarg);
+ fancy_ioctl = 1;
+ break;
+ default:
+ usage(cmd_defrag_usage);
+ }
+ }
+
+ if (check_argc_min(argc - optind, 1))
+ usage(cmd_defrag_usage);
+
+ memset(&range, 0, sizeof(range));
+ range.start = start;
+ range.len = len;
+ range.extent_thresh = thresh;
+ if (compress_type) {
+ range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
+ range.compress_type = compress_type;
+ }
+ if (flush)
+ range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
+
+ for (i = optind; i < argc; i++) {
+ if (verbose)
+ printf("%s\n", argv[i]);
+ fd = open_file_or_dir(argv[i]);
+ if (fd < 0) {
+ fprintf(stderr, "failed to open %s\n", argv[i]);
+ perror("open:");
+ errors++;
+ continue;
+ }
+ if (!fancy_ioctl) {
+ ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
+ e=errno;
+ } else {
+ ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, &range);
+ if (ret && errno == ENOTTY) {
+ fprintf(stderr, "ERROR: defrag range ioctl not "
+ "supported in this kernel, please try "
+ "without any options.\n");
+ errors++;
+ close(fd);
+ break;
+ }
+ e = errno;
+ }
+ if (ret) {
+ fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
+ argv[i], strerror(e));
+ errors++;
+ }
+ close(fd);
+ }
+ if (verbose)
+ printf("%s\n", BTRFS_BUILD_VERSION);
+ if (errors) {
+ fprintf(stderr, "total %d failures\n", errors);
+ exit(1);
+ }
+
+ return errors;
+}
+
+static const char * const cmd_resize_usage[] = {
+ "btrfs filesystem resize [devid:][+/-]<newsize>[gkm]|[devid:]max <path>",
+ "Resize a filesystem",
+ "If 'max' is passed, the filesystem will occupy all available space",
+ "on the device 'devid'.",
+ NULL
+};
+
+static int cmd_resize(int argc, char **argv)
+{
+ struct btrfs_ioctl_vol_args args;
+ int fd, res, len, e;
+ char *amount, *path;
+
+ if (check_argc_exact(argc, 3))
+ usage(cmd_resize_usage);
+
+ amount = argv[1];
+ path = argv[2];
+
+ len = strlen(amount);
+ if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
+ fprintf(stderr, "ERROR: size value too long ('%s)\n",
+ amount);
+ return 14;
+ }
+
+ fd = open_file_or_dir(path);
+ if (fd < 0) {
+ fprintf(stderr, "ERROR: can't access to '%s'\n", path);
+ return 12;
+ }
+
+ printf("Resize '%s' of '%s'\n", path, amount);
+ strncpy_null(args.name, amount);
+ res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
+ e = errno;
+ close(fd);
+ if( res < 0 ){
+ fprintf(stderr, "ERROR: unable to resize '%s' - %s\n",
+ path, strerror(e));
+ return 30;
+ }
+ return 0;
+}
+
+static const char * const cmd_label_usage[] = {
+ "btrfs filesystem label [<device>|<mountpoint>] [<newlabel>]",
+ "Get or change the label of a filesystem",
+ "With one argument, get the label of filesystem on <device>.",
+ "If <newlabel> is passed, set the filesystem label to <newlabel>.",
+ NULL
+};
+
+static int cmd_label(int argc, char **argv)
+{
+ if (check_argc_min(argc, 2) || check_argc_max(argc, 3))
+ usage(cmd_label_usage);
+
+ if (argc > 2)
+ return set_label(argv[1], argv[2]);
+ else
+ return get_label(argv[1]);
+}
+
+const struct cmd_group filesystem_cmd_group = {
+ filesystem_cmd_group_usage, NULL, {
+ { "df", cmd_df, cmd_df_usage, NULL, 0 },
+ { "show", cmd_show, cmd_show_usage, NULL, 0 },
+ { "sync", cmd_sync, cmd_sync_usage, NULL, 0 },
+ { "defragment", cmd_defrag, cmd_defrag_usage, NULL, 0 },
+ { "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
+ { "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
+ { "label", cmd_label, cmd_label_usage, NULL, 0 },
+ { 0, 0, 0, 0, 0 },
+ }
+};
+
+int cmd_filesystem(int argc, char **argv)
+{
+ return handle_command_group(&filesystem_cmd_group, argc, argv);
+}
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