X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=cmds-filesystem.c;h=225df42145d6f5cf960216db337d72a11509aefd;hb=51667947e435444d9e125189b2a07e3966ac145c;hp=7e8ca95052e921a3230e8045b868f5dc444c3f96;hpb=cfee4bc139ccb0e1332ec5f108ecb9dd1932e451;p=platform%2Fupstream%2Fbtrfs-progs.git diff --git a/cmds-filesystem.c b/cmds-filesystem.c index 7e8ca95..225df42 100644 --- a/cmds-filesystem.c +++ b/cmds-filesystem.c @@ -14,7 +14,6 @@ * Boston, MA 021110-1307, USA. */ -#define _XOPEN_SOURCE 500 #include #include #include @@ -29,137 +28,40 @@ #include #include +#include + #include "kerncompat.h" #include "ctree.h" -#include "ioctl.h" #include "utils.h" #include "volumes.h" -#include "version.h" #include "commands.h" +#include "cmds-fi-usage.h" #include "list_sort.h" #include "disk-io.h" - +#include "help.h" /* * for btrfs fi show, we maintain a hash of fsids we've already printed. * This way we don't print dups if a given FS is mounted more than once. */ -#define SEEN_FSID_HASH_SIZE 256 - -struct seen_fsid { - u8 fsid[BTRFS_FSID_SIZE]; - struct seen_fsid *next; -}; - static struct seen_fsid *seen_fsid_hash[SEEN_FSID_HASH_SIZE] = {NULL,}; -static int add_seen_fsid(u8 *fsid) -{ - u8 hash = fsid[0]; - int slot = hash % SEEN_FSID_HASH_SIZE; - struct seen_fsid *seen = seen_fsid_hash[slot]; - struct seen_fsid *alloc; - - if (!seen) - goto insert; - - while (1) { - if (memcmp(seen->fsid, fsid, BTRFS_FSID_SIZE) == 0) - return -EEXIST; - - if (!seen->next) - break; - - seen = seen->next; - } - -insert: - - alloc = malloc(sizeof(*alloc)); - if (!alloc) - return -ENOMEM; - - alloc->next = NULL; - memcpy(alloc->fsid, fsid, BTRFS_FSID_SIZE); - - if (seen) - seen->next = alloc; - else - seen_fsid_hash[slot] = alloc; - - return 0; -} - -static void free_seen_fsid(void) -{ - int slot; - struct seen_fsid *seen; - struct seen_fsid *next; - - for (slot = 0; slot < SEEN_FSID_HASH_SIZE; slot++) { - seen = seen_fsid_hash[slot]; - while (seen) { - next = seen->next; - free(seen); - seen = next; - } - seen_fsid_hash[slot] = NULL; - } -} - static const char * const filesystem_cmd_group_usage[] = { "btrfs filesystem [] []", NULL }; -static const char * const cmd_df_usage[] = { - "btrfs filesystem df ", +static const char * const cmd_filesystem_df_usage[] = { + "btrfs filesystem df [options] ", "Show space usage information for a mount point", + HELPINFO_UNITS_SHORT_LONG, NULL }; -static char *group_type_str(u64 flag) -{ - switch (flag & BTRFS_BLOCK_GROUP_TYPE_MASK) { - case BTRFS_BLOCK_GROUP_DATA: - return "Data"; - case BTRFS_BLOCK_GROUP_SYSTEM: - return "System"; - case BTRFS_BLOCK_GROUP_METADATA: - return "Metadata"; - case BTRFS_BLOCK_GROUP_DATA|BTRFS_BLOCK_GROUP_METADATA: - return "Data+Metadata"; - default: - return "unknown"; - } -} - -static char *group_profile_str(u64 flag) -{ - switch (flag & BTRFS_BLOCK_GROUP_PROFILE_MASK) { - case 0: - return "single"; - case BTRFS_BLOCK_GROUP_RAID0: - return "RAID0"; - case BTRFS_BLOCK_GROUP_RAID1: - return "RAID1"; - case BTRFS_BLOCK_GROUP_RAID5: - return "RAID5"; - case BTRFS_BLOCK_GROUP_RAID6: - return "RAID6"; - case BTRFS_BLOCK_GROUP_DUP: - return "DUP"; - case BTRFS_BLOCK_GROUP_RAID10: - return "RAID10"; - default: - return "unknown"; - } -} - static int get_df(int fd, struct btrfs_ioctl_space_args **sargs_ret) { u64 count = 0; - int ret, e; + int ret; struct btrfs_ioctl_space_args *sargs; sargs = malloc(sizeof(struct btrfs_ioctl_space_args)); @@ -170,12 +72,10 @@ static int get_df(int fd, struct btrfs_ioctl_space_args **sargs_ret) sargs->total_spaces = 0; ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs); - e = errno; - if (ret) { - fprintf(stderr, "ERROR: couldn't get space info - %s\n", - strerror(e)); + if (ret < 0) { + error("cannot get space info: %m"); free(sargs); - return -e; + return -errno; } /* This really should never happen */ if (!sargs->total_spaces) { @@ -193,63 +93,66 @@ static int get_df(int fd, struct btrfs_ioctl_space_args **sargs_ret) sargs->space_slots = count; sargs->total_spaces = 0; ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs); - e = errno; - if (ret) { - fprintf(stderr, "ERROR: get space info count %llu - %s\n", - count, strerror(e)); + if (ret < 0) { + error("cannot get space info with %llu slots: %m", + count); free(sargs); - return -e; + return -errno; } *sargs_ret = sargs; return 0; } -static void print_df(struct btrfs_ioctl_space_args *sargs) +static void print_df(struct btrfs_ioctl_space_args *sargs, unsigned unit_mode) { u64 i; struct btrfs_ioctl_space_info *sp = sargs->spaces; for (i = 0; i < sargs->total_spaces; i++, sp++) { printf("%s, %s: total=%s, used=%s\n", - group_type_str(sp->flags), - group_profile_str(sp->flags), - pretty_size(sp->total_bytes), - pretty_size(sp->used_bytes)); + btrfs_group_type_str(sp->flags), + btrfs_group_profile_str(sp->flags), + pretty_size_mode(sp->total_bytes, unit_mode), + pretty_size_mode(sp->used_bytes, unit_mode)); } } -static int cmd_df(int argc, char **argv) +static int cmd_filesystem_df(int argc, char **argv) { struct btrfs_ioctl_space_args *sargs = NULL; int ret; int fd; char *path; - DIR *dirstream = NULL; + DIR *dirstream = NULL; + unsigned unit_mode; + + unit_mode = get_unit_mode_from_arg(&argc, argv, 1); - if (check_argc_exact(argc, 2)) - usage(cmd_df_usage); + clean_args_no_options(argc, argv, cmd_filesystem_df_usage); - path = argv[1]; + if (check_argc_exact(argc - optind, 1)) + usage(cmd_filesystem_df_usage); - fd = open_file_or_dir(path, &dirstream); - if (fd < 0) { - fprintf(stderr, "ERROR: can't access '%s'\n", path); + path = argv[optind]; + + fd = btrfs_open_dir(path, &dirstream, 1); + if (fd < 0) return 1; - } + ret = get_df(fd, &sargs); if (ret == 0) { - print_df(sargs); + print_df(sargs, unit_mode); free(sargs); } else { - fprintf(stderr, "ERROR: get_df failed %s\n", strerror(-ret)); + error("get_df failed %s", strerror(-ret)); } close_file_or_dir(fd, dirstream); return !!ret; } -static int match_search_item_kernel(__u8 *fsid, char *mnt, char *label, +static int match_search_item_kernel(u8 *fsid, char *mnt, char *label, char *search) { char uuidbuf[BTRFS_UUID_UNPARSED_SIZE]; @@ -260,7 +163,7 @@ static int match_search_item_kernel(__u8 *fsid, char *mnt, char *label, if (!strncmp(uuidbuf, search, search_len)) return 1; - if (strlen(label) && strcmp(label, search) == 0) + if (*label && strcmp(label, search) == 0) return 1; if (strcmp(mnt, search) == 0) @@ -269,10 +172,9 @@ static int match_search_item_kernel(__u8 *fsid, char *mnt, char *label, return 0; } -static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search) +static int uuid_search(struct btrfs_fs_devices *fs_devices, const char *search) { char uuidbuf[BTRFS_UUID_UNPARSED_SIZE]; - struct list_head *cur; struct btrfs_device *device; int search_len = strlen(search); @@ -281,8 +183,7 @@ static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search) if (!strncmp(uuidbuf, search, search_len)) return 1; - list_for_each(cur, &fs_devices->devices) { - device = list_entry(cur, struct btrfs_device, dev_list); + list_for_each_entry(device, &fs_devices->devices, dev_list) { if ((device->label && strcmp(device->label, search) == 0) || strcmp(device->name, search) == 0) return 1; @@ -305,15 +206,78 @@ static int cmp_device_id(void *priv, struct list_head *a, da->devid > db->devid ? 1 : 0; } -static void print_one_uuid(struct btrfs_fs_devices *fs_devices) +static void splice_device_list(struct list_head *seed_devices, + struct list_head *all_devices) +{ + struct btrfs_device *in_all, *next_all; + struct btrfs_device *in_seed, *next_seed; + + list_for_each_entry_safe(in_all, next_all, all_devices, dev_list) { + list_for_each_entry_safe(in_seed, next_seed, seed_devices, + dev_list) { + if (in_all->devid == in_seed->devid) { + /* + * When do dev replace in a sprout fs + * to a dev in its seed fs, the replacing + * dev will reside in the sprout fs and + * the replaced dev will still exist + * in the seed fs. + * So pick the latest one when showing + * the sprout fs. + */ + if (in_all->generation + < in_seed->generation) { + list_del(&in_all->dev_list); + free(in_all); + } else if (in_all->generation + > in_seed->generation) { + list_del(&in_seed->dev_list); + free(in_seed); + } + break; + } + } + } + + list_splice(seed_devices, all_devices); +} + +static void print_devices(struct btrfs_fs_devices *fs_devices, + u64 *devs_found, unsigned unit_mode) +{ + struct btrfs_device *device; + struct btrfs_fs_devices *cur_fs; + struct list_head *all_devices; + + all_devices = &fs_devices->devices; + cur_fs = fs_devices->seed; + /* add all devices of seed fs to the fs to be printed */ + while (cur_fs) { + splice_device_list(&cur_fs->devices, all_devices); + cur_fs = cur_fs->seed; + } + + list_sort(NULL, all_devices, cmp_device_id); + list_for_each_entry(device, all_devices, dev_list) { + printf("\tdevid %4llu size %s used %s path %s\n", + (unsigned long long)device->devid, + pretty_size_mode(device->total_bytes, unit_mode), + pretty_size_mode(device->bytes_used, unit_mode), + device->name); + + (*devs_found)++; + } +} + +static void print_one_uuid(struct btrfs_fs_devices *fs_devices, + unsigned unit_mode) { char uuidbuf[BTRFS_UUID_UNPARSED_SIZE]; - struct list_head *cur; struct btrfs_device *device; u64 devs_found = 0; u64 total; - if (add_seen_fsid(fs_devices->fsid)) + if (add_seen_fsid(fs_devices->fsid, seen_fsid_hash, -1, NULL)) return; uuid_unparse(fs_devices->fsid, uuidbuf); @@ -324,23 +288,13 @@ static void print_one_uuid(struct btrfs_fs_devices *fs_devices) else printf("Label: none "); - total = device->total_devs; printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf, (unsigned long long)total, - pretty_size(device->super_bytes_used)); - - list_sort(NULL, &fs_devices->devices, cmp_device_id); - list_for_each(cur, &fs_devices->devices) { - device = list_entry(cur, struct btrfs_device, dev_list); + pretty_size_mode(device->super_bytes_used, unit_mode)); - printf("\tdevid %4llu size %s used %s path %s\n", - (unsigned long long)device->devid, - pretty_size(device->total_bytes), - pretty_size(device->bytes_used), device->name); + print_devices(fs_devices, &devs_found, unit_mode); - devs_found++; - } if (devs_found < total) { printf("\t*** Some devices missing\n"); } @@ -361,7 +315,7 @@ static u64 calc_used_bytes(struct btrfs_ioctl_space_args *si) static int print_one_fs(struct btrfs_ioctl_fs_info_args *fs_info, struct btrfs_ioctl_dev_info_args *dev_info, struct btrfs_ioctl_space_args *space_info, - char *label, char *path) + char *label, unsigned unit_mode) { int i; int fd; @@ -370,23 +324,26 @@ static int print_one_fs(struct btrfs_ioctl_fs_info_args *fs_info, struct btrfs_ioctl_dev_info_args *tmp_dev_info; int ret; - ret = add_seen_fsid(fs_info->fsid); + ret = add_seen_fsid(fs_info->fsid, seen_fsid_hash, -1, NULL); if (ret == -EEXIST) return 0; else if (ret) return ret; uuid_unparse(fs_info->fsid, uuidbuf); - if (label && strlen(label)) + if (label && *label) printf("Label: '%s' ", label); else printf("Label: none "); printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf, fs_info->num_devices, - pretty_size(calc_used_bytes(space_info))); + pretty_size_mode(calc_used_bytes(space_info), + unit_mode)); for (i = 0; i < fs_info->num_devices; i++) { + char *canonical_path; + tmp_dev_info = (struct btrfs_ioctl_dev_info_args *)&dev_info[i]; /* Add check for missing devices even mounted */ @@ -396,11 +353,14 @@ static int print_one_fs(struct btrfs_ioctl_fs_info_args *fs_info, continue; } close(fd); + canonical_path = canonicalize_path((char *)tmp_dev_info->path); printf("\tdevid %4llu size %s used %s path %s\n", tmp_dev_info->devid, - pretty_size(tmp_dev_info->total_bytes), - pretty_size(tmp_dev_info->bytes_used), - tmp_dev_info->path); + pretty_size_mode(tmp_dev_info->total_bytes, unit_mode), + pretty_size_mode(tmp_dev_info->bytes_used, unit_mode), + canonical_path); + + free(canonical_path); } if (missing) @@ -409,39 +369,7 @@ static int print_one_fs(struct btrfs_ioctl_fs_info_args *fs_info, return 0; } -/* This function checks if the given input parameter is - * an uuid or a path - * return -1: some error in the given input - * return 0: unknow input - * return 1: given input is uuid - * return 2: given input is path - */ -static int check_arg_type(char *input) -{ - uuid_t out; - char path[PATH_MAX]; - - if (!input) - return -EINVAL; - - if (realpath(input, path)) { - if (is_block_device(path) == 1) - return BTRFS_ARG_BLKDEV; - - if (is_mount_point(path) == 1) - return BTRFS_ARG_MNTPOINT; - - return BTRFS_ARG_UNKNOWN; - } - - if (strlen(input) == (BTRFS_UUID_UNPARSED_SIZE - 1) && - !uuid_parse(input, out)) - return BTRFS_ARG_UUID; - - return BTRFS_ARG_UNKNOWN; -} - -static int btrfs_scan_kernel(void *search) +static int btrfs_scan_kernel(void *search, unsigned unit_mode) { int ret = 0, fd; int found = 0; @@ -458,6 +386,8 @@ static int btrfs_scan_kernel(void *search) memset(label, 0, sizeof(label)); while ((mnt = getmntent(f)) != NULL) { + free(dev_info_arg); + dev_info_arg = NULL; if (strcmp(mnt->mnt_type, "btrfs")) continue; ret = get_fs_info(mnt->mnt_dir, &fs_info_arg, @@ -465,164 +395,368 @@ static int btrfs_scan_kernel(void *search) if (ret) goto out; - if (get_label_mounted(mnt->mnt_dir, label)) { - kfree(dev_info_arg); + /* skip all fs already shown as mounted fs */ + if (is_seen_fsid(fs_info_arg.fsid, seen_fsid_hash)) + continue; + + ret = get_label_mounted(mnt->mnt_dir, label); + /* provide backward kernel compatibility */ + if (ret == -ENOTTY) + ret = get_label_unmounted( + (const char *)dev_info_arg->path, label); + + if (ret) goto out; - } + if (search && !match_search_item_kernel(fs_info_arg.fsid, mnt->mnt_dir, label, search)) { - kfree(dev_info_arg); continue; } fd = open(mnt->mnt_dir, O_RDONLY); if ((fd != -1) && !get_df(fd, &space_info_arg)) { print_one_fs(&fs_info_arg, dev_info_arg, - space_info_arg, label, mnt->mnt_dir); - kfree(space_info_arg); + space_info_arg, label, unit_mode); + free(space_info_arg); memset(label, 0, sizeof(label)); found = 1; } if (fd != -1) close(fd); - kfree(dev_info_arg); } out: + free(dev_info_arg); endmntent(f); return !found; } -static int dev_to_fsid(char *dev, __u8 *fsid) +static void free_fs_devices(struct btrfs_fs_devices *fs_devices) { - struct btrfs_super_block *disk_super; - char *buf; - int ret; - int fd; + struct btrfs_fs_devices *cur_seed, *next_seed; + struct btrfs_device *device; - buf = malloc(4096); - if (!buf) - return -ENOMEM; + while (!list_empty(&fs_devices->devices)) { + device = list_entry(fs_devices->devices.next, + struct btrfs_device, dev_list); + list_del(&device->dev_list); - fd = open(dev, O_RDONLY); - if (fd < 0) { - ret = -errno; - free(buf); - return ret; + free(device->name); + free(device->label); + free(device); } - disk_super = (struct btrfs_super_block *)buf; - ret = btrfs_read_dev_super(fd, disk_super, - BTRFS_SUPER_INFO_OFFSET, 0); - if (ret) - goto out; + /* free seed fs chain */ + cur_seed = fs_devices->seed; + fs_devices->seed = NULL; + while (cur_seed) { + next_seed = cur_seed->seed; + free(cur_seed); + + cur_seed = next_seed; + } + + list_del(&fs_devices->list); + free(fs_devices); +} + +static int copy_device(struct btrfs_device *dst, + struct btrfs_device *src) +{ + dst->devid = src->devid; + memcpy(dst->uuid, src->uuid, BTRFS_UUID_SIZE); + if (src->name == NULL) + dst->name = NULL; + else { + dst->name = strdup(src->name); + if (!dst->name) + return -ENOMEM; + } + if (src->label == NULL) + dst->label = NULL; + else { + dst->label = strdup(src->label); + if (!dst->label) { + free(dst->name); + return -ENOMEM; + } + } + dst->total_devs = src->total_devs; + dst->super_bytes_used = src->super_bytes_used; + dst->total_bytes = src->total_bytes; + dst->bytes_used = src->bytes_used; + dst->generation = src->generation; + + return 0; +} + +static int copy_fs_devices(struct btrfs_fs_devices *dst, + struct btrfs_fs_devices *src) +{ + struct btrfs_device *cur_dev, *dev_copy; + int ret = 0; + + memcpy(dst->fsid, src->fsid, BTRFS_FSID_SIZE); + INIT_LIST_HEAD(&dst->devices); + dst->seed = NULL; + + list_for_each_entry(cur_dev, &src->devices, dev_list) { + dev_copy = malloc(sizeof(*dev_copy)); + if (!dev_copy) { + ret = -ENOMEM; + break; + } + + ret = copy_device(dev_copy, cur_dev); + if (ret) { + free(dev_copy); + break; + } + + list_add(&dev_copy->dev_list, &dst->devices); + dev_copy->fs_devices = dst; + } + + return ret; +} + +static int find_and_copy_seed(struct btrfs_fs_devices *seed, + struct btrfs_fs_devices *copy, + struct list_head *fs_uuids) { + struct btrfs_fs_devices *cur_fs; + + list_for_each_entry(cur_fs, fs_uuids, list) + if (!memcmp(seed->fsid, cur_fs->fsid, BTRFS_FSID_SIZE)) + return copy_fs_devices(copy, cur_fs); + + return 1; +} + +static int has_seed_devices(struct btrfs_fs_devices *fs_devices) +{ + struct btrfs_device *device; + int dev_cnt_total, dev_cnt = 0; + + device = list_first_entry(&fs_devices->devices, struct btrfs_device, + dev_list); - memcpy(fsid, disk_super->fsid, BTRFS_FSID_SIZE); - ret = 0; + dev_cnt_total = device->total_devs; + + list_for_each_entry(device, &fs_devices->devices, dev_list) + dev_cnt++; + + return dev_cnt_total != dev_cnt; +} + +static int search_umounted_fs_uuids(struct list_head *all_uuids, + char *search, int *found) +{ + struct btrfs_fs_devices *cur_fs, *fs_copy; + struct list_head *fs_uuids; + int ret = 0; + + fs_uuids = btrfs_scanned_uuids(); + + /* + * The fs_uuids list is global, and open_ctree_* will + * modify it, make a private copy here + */ + list_for_each_entry(cur_fs, fs_uuids, list) { + /* don't bother handle all fs, if search target specified */ + if (search) { + if (uuid_search(cur_fs, search) == 0) + continue; + if (found) + *found = 1; + } + + /* skip all fs already shown as mounted fs */ + if (is_seen_fsid(cur_fs->fsid, seen_fsid_hash)) + continue; + + fs_copy = calloc(1, sizeof(*fs_copy)); + if (!fs_copy) { + ret = -ENOMEM; + goto out; + } + + ret = copy_fs_devices(fs_copy, cur_fs); + if (ret) { + free(fs_copy); + goto out; + } + + list_add(&fs_copy->list, all_uuids); + } out: - close(fd); - free(buf); return ret; } -static const char * const cmd_show_usage[] = { +static int map_seed_devices(struct list_head *all_uuids) +{ + struct btrfs_fs_devices *cur_fs, *cur_seed; + struct btrfs_fs_devices *seed_copy; + struct btrfs_fs_devices *opened_fs; + struct btrfs_device *device; + struct btrfs_fs_info *fs_info; + struct list_head *fs_uuids; + int ret = 0; + + fs_uuids = btrfs_scanned_uuids(); + + list_for_each_entry(cur_fs, all_uuids, list) { + device = list_first_entry(&cur_fs->devices, + struct btrfs_device, dev_list); + if (!device) + continue; + + /* skip fs without seeds */ + if (!has_seed_devices(cur_fs)) + continue; + + /* + * open_ctree_* detects seed/sprout mapping + */ + fs_info = open_ctree_fs_info(device->name, 0, 0, 0, + OPEN_CTREE_PARTIAL); + if (!fs_info) + continue; + + /* + * copy the seed chain under the opened fs + */ + opened_fs = fs_info->fs_devices; + cur_seed = cur_fs; + while (opened_fs->seed) { + seed_copy = malloc(sizeof(*seed_copy)); + if (!seed_copy) { + ret = -ENOMEM; + goto fail_out; + } + ret = find_and_copy_seed(opened_fs->seed, seed_copy, + fs_uuids); + if (ret) { + free(seed_copy); + goto fail_out; + } + + cur_seed->seed = seed_copy; + + opened_fs = opened_fs->seed; + cur_seed = cur_seed->seed; + } + + close_ctree(fs_info->chunk_root); + } + +out: + return ret; +fail_out: + close_ctree(fs_info->chunk_root); + goto out; +} + +static const char * const cmd_filesystem_show_usage[] = { "btrfs filesystem show [options] [|||label]", "Show the structure of a filesystem", "-d|--all-devices show only disks under /dev containing btrfs filesystem", "-m|--mounted show only mounted btrfs", + HELPINFO_UNITS_LONG, "If no argument is given, structure of all present filesystems is shown.", NULL }; -static int cmd_show(int argc, char **argv) +static int cmd_filesystem_show(int argc, char **argv) { - struct list_head *all_uuids; + LIST_HEAD(all_uuids); struct btrfs_fs_devices *fs_devices; - struct list_head *cur_uuid; char *search = NULL; int ret; - int where = BTRFS_SCAN_LBLKID; + /* default, search both kernel and udev */ + int where = -1; int type = 0; - char mp[BTRFS_PATH_NAME_MAX + 1]; + char mp[PATH_MAX]; char path[PATH_MAX]; - __u8 fsid[BTRFS_FSID_SIZE]; + u8 fsid[BTRFS_FSID_SIZE]; char uuid_buf[BTRFS_UUID_UNPARSED_SIZE]; + unsigned unit_mode; int found = 0; + unit_mode = get_unit_mode_from_arg(&argc, argv, 0); + while (1) { - int long_index; - static struct option long_options[] = { + int c; + static const struct option long_options[] = { { "all-devices", no_argument, NULL, 'd'}, { "mounted", no_argument, NULL, 'm'}, - { NULL, no_argument, NULL, 0 }, + { NULL, 0, NULL, 0 } }; - int c = getopt_long(argc, argv, "dm", long_options, - &long_index); + + c = getopt_long(argc, argv, "dm", long_options, NULL); if (c < 0) break; switch (c) { case 'd': - where = BTRFS_SCAN_DEV; + where = BTRFS_SCAN_LBLKID; break; case 'm': where = BTRFS_SCAN_MOUNTED; break; default: - usage(cmd_show_usage); + usage(cmd_filesystem_show_usage); } } if (check_argc_max(argc, optind + 1)) - usage(cmd_show_usage); + usage(cmd_filesystem_show_usage); if (argc > optind) { search = argv[optind]; - if (strlen(search) == 0) - usage(cmd_show_usage); + if (*search == 0) + usage(cmd_filesystem_show_usage); type = check_arg_type(search); + /* - * needs spl handling if input arg is block dev - * And if input arg is mount-point just print it - * right away + * For search is a device: + * realpath do /dev/mapper/XX => /dev/dm-X + * which is required by BTRFS_SCAN_DEV + * For search is a mountpoint: + * realpath do /mnt/btrfs/ => /mnt/btrfs + * which shall be recognized by btrfs_scan_kernel() */ - if (type == BTRFS_ARG_BLKDEV) { - if (where == BTRFS_SCAN_DEV) { - /* we need to do this because - * legacy BTRFS_SCAN_DEV - * provides /dev/dm-x paths - */ - if (realpath(search, path)) - search = path; + if (realpath(search, path)) + search = path; + + /* + * Needs special handling if input arg is block dev And if + * input arg is mount-point just print it right away + */ + if (type == BTRFS_ARG_BLKDEV && where != BTRFS_SCAN_LBLKID) { + ret = get_btrfs_mount(search, mp, sizeof(mp)); + if (!ret) { + /* given block dev is mounted */ + search = mp; + type = BTRFS_ARG_MNTPOINT; } else { - ret = get_btrfs_mount(search, - mp, sizeof(mp)); - if (!ret) { - /* given block dev is mounted*/ - search = mp; - type = BTRFS_ARG_MNTPOINT; - } else { - ret = dev_to_fsid(search, fsid); - if (ret) { - fprintf(stderr, - "ERROR: No btrfs on %s\n", - search); - return 1; - } - uuid_unparse(fsid, uuid_buf); - search = uuid_buf; - type = BTRFS_ARG_UUID; - goto devs_only; + ret = dev_to_fsid(search, fsid); + if (ret) { + error("no btrfs on %s", search); + return 1; } + uuid_unparse(fsid, uuid_buf); + search = uuid_buf; + type = BTRFS_ARG_UUID; + goto devs_only; } } } - if (where == BTRFS_SCAN_DEV) + if (where == BTRFS_SCAN_LBLKID) goto devs_only; /* show mounted btrfs */ - ret = btrfs_scan_kernel(search); + ret = btrfs_scan_kernel(search, unit_mode); if (search && !ret) { /* since search is found we are done */ goto out; @@ -633,67 +767,64 @@ static int cmd_show(int argc, char **argv) goto out; devs_only: - ret = scan_for_btrfs(where, !BTRFS_UPDATE_KERNEL); + ret = btrfs_scan_devices(); if (ret) { - fprintf(stderr, "ERROR: %d while scanning\n", ret); + error("blkid device scan returned %d", ret); return 1; } - - 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); - found = 1; + ret = search_umounted_fs_uuids(&all_uuids, search, &found); + if (ret < 0) { + error("searching target device returned error %d", ret); + return 1; + } + + /* + * The seed/sprout mapping are not detected yet, + * do mapping build for all umounted fs + */ + ret = map_seed_devices(&all_uuids); + if (ret) { + error("mapping seed devices returned error %d", ret); + return 1; } - if (search && !found) - ret = 1; - while (!list_empty(all_uuids)) { - fs_devices = list_entry(all_uuids->next, + list_for_each_entry(fs_devices, &all_uuids, list) + print_one_uuid(fs_devices, unit_mode); + + if (search && !found) { + error("not a valid btrfs filesystem: %s", search); + ret = 1; + } + while (!list_empty(&all_uuids)) { + fs_devices = list_entry(all_uuids.next, struct btrfs_fs_devices, list); - btrfs_close_devices(fs_devices); + free_fs_devices(fs_devices); } out: - printf("%s\n", BTRFS_BUILD_VERSION); - free_seen_fsid(); + free_seen_fsid(seen_fsid_hash); return ret; } -static const char * const cmd_sync_usage[] = { +static const char * const cmd_filesystem_sync_usage[] = { "btrfs filesystem sync ", "Force a sync on a filesystem", NULL }; -static int cmd_sync(int argc, char **argv) +static int cmd_filesystem_sync(int argc, char **argv) { - int fd, res, e; - char *path; - DIR *dirstream = NULL; + enum btrfs_util_error err; - if (check_argc_exact(argc, 2)) - usage(cmd_sync_usage); + clean_args_no_options(argc, argv, cmd_filesystem_sync_usage); - path = argv[1]; - - fd = open_file_or_dir(path, &dirstream); - if (fd < 0) { - fprintf(stderr, "ERROR: can't access '%s'\n", path); - return 1; - } + if (check_argc_exact(argc - optind, 1)) + usage(cmd_filesystem_sync_usage); - printf("FSSync '%s'\n", path); - res = ioctl(fd, BTRFS_IOC_SYNC); - e = errno; - close_file_or_dir(fd, dirstream); - if( res < 0 ){ - fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n", - path, strerror(e)); + err = btrfs_util_sync(argv[optind]); + if (err) { + error_btrfs_util(err); return 1; } @@ -706,40 +837,33 @@ static int parse_compress_type(char *s) return BTRFS_COMPRESS_ZLIB; else if (strcmp(optarg, "lzo") == 0) return BTRFS_COMPRESS_LZO; + else if (strcmp(optarg, "zstd") == 0) + return BTRFS_COMPRESS_ZSTD; else { - fprintf(stderr, "Unknown compress type %s\n", s); + error("unknown compression type %s", s); exit(1); }; } -static const char * const cmd_defrag_usage[] = { +static const char * const cmd_filesystem_defrag_usage[] = { "btrfs filesystem defragment [options] | [|...]", "Defragment a file or a directory", "", - "-v be verbose", - "-r defragment files recursively", - "-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", + "-v be verbose", + "-r defragment files recursively", + "-c[zlib,lzo,zstd] 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 target extent size hint (default: 32M)", + "", + "Warning: most Linux kernels will break up the ref-links of COW data", + "(e.g., files copied with 'cp --reflink', snapshots) which may cause", + "considerable increase of space usage. See btrfs-filesystem(8) for", + "more information.", NULL }; -static int do_defrag(int fd, int fancy_ioctl, - struct btrfs_ioctl_defrag_range_args *range) -{ - int ret; - - if (!fancy_ioctl) - ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL); - else - ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, range); - - return ret; -} - -static int defrag_global_fancy_ioctl; static struct btrfs_ioctl_defrag_range_args defrag_global_range; static int defrag_global_verbose; static int defrag_global_errors; @@ -747,57 +871,59 @@ static int defrag_callback(const char *fpath, const struct stat *sb, int typeflag, struct FTW *ftwbuf) { int ret = 0; - int e = 0; int fd = 0; if ((typeflag == FTW_F) && S_ISREG(sb->st_mode)) { if (defrag_global_verbose) printf("%s\n", fpath); fd = open(fpath, O_RDWR); - e = errno; - if (fd < 0) + if (fd < 0) { goto error; - ret = do_defrag(fd, defrag_global_fancy_ioctl, &defrag_global_range); - e = errno; + } + ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, &defrag_global_range); close(fd); - if (ret && e == ENOTTY && defrag_global_fancy_ioctl) { - fprintf(stderr, "ERROR: defrag range ioctl not " - "supported in this kernel, please try " - "without any options.\n"); + if (ret && errno == ENOTTY) { + error( +"defrag range ioctl not supported in this kernel version, 2.6.33 and newer is required"); defrag_global_errors++; return ENOTTY; } - if (ret) + if (ret) { goto error; + } } return 0; error: - fprintf(stderr, "ERROR: defrag failed on %s - %s\n", fpath, strerror(e)); + error("defrag failed on %s: %m", fpath); defrag_global_errors++; return 0; } -static int cmd_defrag(int argc, char **argv) +static int cmd_filesystem_defrag(int argc, char **argv) { int fd; int flush = 0; u64 start = 0; u64 len = (u64)-1; - u32 thresh = 0; + u64 thresh; int i; int recursive = 0; int ret = 0; - struct btrfs_ioctl_defrag_range_args range; - int e = 0; int compress_type = BTRFS_COMPRESS_NONE; DIR *dirstream; + /* + * Kernel has a different default (256K) that is supposed to be safe, + * but it does not defragment very well. The 32M will likely lead to + * better results and is independent of the kernel default. We have to + * use the v2 defrag ioctl. + */ + thresh = SZ_32M; + defrag_global_errors = 0; defrag_global_verbose = 0; defrag_global_errors = 0; - defrag_global_fancy_ioctl = 0; - optind = 1; while(1) { int c = getopt(argc, argv, "vrc::fs:l:t:"); if (c < 0) @@ -808,42 +934,43 @@ static int cmd_defrag(int argc, char **argv) compress_type = BTRFS_COMPRESS_ZLIB; if (optarg) compress_type = parse_compress_type(optarg); - defrag_global_fancy_ioctl = 1; break; case 'f': flush = 1; - defrag_global_fancy_ioctl = 1; break; case 'v': defrag_global_verbose = 1; break; case 's': start = parse_size(optarg); - defrag_global_fancy_ioctl = 1; break; case 'l': len = parse_size(optarg); - defrag_global_fancy_ioctl = 1; break; case 't': thresh = parse_size(optarg); - defrag_global_fancy_ioctl = 1; + if (thresh > (u32)-1) { + warning( + "target extent size %llu too big, trimmed to %u", + thresh, (u32)-1); + thresh = (u32)-1; + } break; case 'r': recursive = 1; break; default: - usage(cmd_defrag_usage); + usage(cmd_filesystem_defrag_usage); } } if (check_argc_min(argc - optind, 1)) - usage(cmd_defrag_usage); + usage(cmd_filesystem_defrag_usage); - memset(&defrag_global_range, 0, sizeof(range)); + memset(&defrag_global_range, 0, sizeof(defrag_global_range)); defrag_global_range.start = start; defrag_global_range.len = len; - defrag_global_range.extent_thresh = thresh; + defrag_global_range.extent_thresh = (u32)thresh; if (compress_type) { defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS; defrag_global_range.compress_type = compress_type; @@ -851,78 +978,98 @@ static int cmd_defrag(int argc, char **argv) if (flush) defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_START_IO; + /* + * Look for directory arguments and warn if the recursive mode is not + * requested, as this is not implemented as recursive defragmentation + * in kernel. The stat errors are silent here as we check them below. + */ + if (!recursive) { + int found = 0; + + for (i = optind; i < argc; i++) { + struct stat st; + + if (stat(argv[i], &st)) + continue; + + if (S_ISDIR(st.st_mode)) { + warning( + "directory specified but recursive mode not requested: %s", + argv[i]); + found = 1; + } + } + if (found) { + warning( +"a directory passed to the defrag ioctl will not process the files\n" +"recursively but will defragment the subvolume tree and the extent tree.\n" +"If this is not intended, please use option -r ."); + } + } + for (i = optind; i < argc; i++) { struct stat st; + int defrag_err = 0; dirstream = NULL; fd = open_file_or_dir(argv[i], &dirstream); if (fd < 0) { - fprintf(stderr, "ERROR: failed to open %s - %s\n", argv[i], - strerror(errno)); - defrag_global_errors++; - close_file_or_dir(fd, dirstream); - continue; + error("cannot open %s: %m", argv[i]); + ret = -errno; + goto next; } - if (fstat(fd, &st)) { - fprintf(stderr, "ERROR: failed to stat %s - %s\n", - argv[i], strerror(errno)); - defrag_global_errors++; - close_file_or_dir(fd, dirstream); - continue; + + ret = fstat(fd, &st); + if (ret) { + error("failed to stat %s: %m", argv[i]); + ret = -errno; + goto next; } if (!(S_ISDIR(st.st_mode) || S_ISREG(st.st_mode))) { - fprintf(stderr, - "ERROR: %s is not a directory or a regular file\n", - argv[i]); - defrag_global_errors++; - close_file_or_dir(fd, dirstream); - continue; + error("%s is not a directory or a regular file", + argv[i]); + ret = -EINVAL; + goto next; } - if (recursive) { - if (S_ISDIR(st.st_mode)) { - ret = nftw(argv[i], defrag_callback, 10, + if (recursive && S_ISDIR(st.st_mode)) { + ret = nftw(argv[i], defrag_callback, 10, FTW_MOUNT | FTW_PHYS); - if (ret == ENOTTY) - exit(1); - /* errors are handled in the callback */ - ret = 0; - } else { - if (defrag_global_verbose) - printf("%s\n", argv[i]); - ret = do_defrag(fd, defrag_global_fancy_ioctl, - &defrag_global_range); - e = errno; - } + if (ret == ENOTTY) + exit(1); + /* errors are handled in the callback */ + ret = 0; } else { if (defrag_global_verbose) printf("%s\n", argv[i]); - ret = do_defrag(fd, defrag_global_fancy_ioctl, + ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, &defrag_global_range); - e = errno; - } - close_file_or_dir(fd, dirstream); - if (ret && e == ENOTTY && defrag_global_fancy_ioctl) { - fprintf(stderr, "ERROR: defrag range ioctl not " - "supported in this kernel, please try " - "without any options.\n"); - defrag_global_errors++; - break; + defrag_err = errno; + if (ret && defrag_err == ENOTTY) { + error( +"defrag range ioctl not supported in this kernel version, 2.6.33 and newer is required"); + defrag_global_errors++; + close_file_or_dir(fd, dirstream); + break; + } + if (ret) { + error("defrag failed on %s: %s", argv[i], + strerror(defrag_err)); + goto next; + } } - if (ret) { - fprintf(stderr, "ERROR: defrag failed on %s - %s\n", - argv[i], strerror(e)); +next: + if (ret) defrag_global_errors++; - } + close_file_or_dir(fd, dirstream); } - if (defrag_global_verbose) - printf("%s\n", BTRFS_BUILD_VERSION); + if (defrag_global_errors) fprintf(stderr, "total %d failures\n", defrag_global_errors); return !!defrag_global_errors; } -static const char * const cmd_resize_usage[] = { +static const char * const cmd_filesystem_resize_usage[] = { "btrfs filesystem resize [devid:][+/-][kKmMgGtTpPeE]|[devid:]max ", "Resize a filesystem", "If 'max' is passed, the filesystem will occupy all available space", @@ -931,46 +1078,76 @@ static const char * const cmd_resize_usage[] = { NULL }; -static int cmd_resize(int argc, char **argv) +static int cmd_filesystem_resize(int argc, char **argv) { struct btrfs_ioctl_vol_args args; int fd, res, len, e; char *amount, *path; DIR *dirstream = NULL; + struct stat st; - if (check_argc_exact(argc, 3)) - usage(cmd_resize_usage); + clean_args_no_options_relaxed(argc, argv, cmd_filesystem_resize_usage); - amount = argv[1]; - path = argv[2]; + if (check_argc_exact(argc - optind, 2)) + usage(cmd_filesystem_resize_usage); + + amount = argv[optind]; + path = argv[optind + 1]; len = strlen(amount); if (len == 0 || len >= BTRFS_VOL_NAME_MAX) { - fprintf(stderr, "ERROR: size value too long ('%s)\n", - amount); + error("resize value too long (%s)", amount); return 1; } - fd = open_file_or_dir(path, &dirstream); - if (fd < 0) { - fprintf(stderr, "ERROR: can't access '%s'\n", path); + res = stat(path, &st); + if (res < 0) { + error("resize: cannot stat %s: %m", path); + return 1; + } + if (!S_ISDIR(st.st_mode)) { + error("resize works on mounted filesystems and accepts only\n" + "directories as argument. Passing file containing a btrfs image\n" + "would resize the underlying filesystem instead of the image.\n"); return 1; } + fd = btrfs_open_dir(path, &dirstream, 1); + if (fd < 0) + return 1; + printf("Resize '%s' of '%s'\n", path, amount); + memset(&args, 0, sizeof(args)); strncpy_null(args.name, amount); res = ioctl(fd, BTRFS_IOC_RESIZE, &args); e = errno; close_file_or_dir(fd, dirstream); if( res < 0 ){ - fprintf(stderr, "ERROR: unable to resize '%s' - %s\n", - path, strerror(e)); + switch (e) { + case EFBIG: + error("unable to resize '%s': no enough free space", + path); + break; + default: + error("unable to resize '%s': %m", path); + break; + } + return 1; + } else if (res > 0) { + const char *err_str = btrfs_err_str(res); + + if (err_str) { + error("resizing of '%s' failed: %s", path, err_str); + } else { + error("resizing of '%s' failed: unknown error %d", + path, res); + } return 1; } return 0; } -static const char * const cmd_label_usage[] = { +static const char * const cmd_filesystem_label_usage[] = { "btrfs filesystem label [|] []", "Get or change the label of a filesystem", "With one argument, get the label of filesystem on .", @@ -978,18 +1155,21 @@ static const char * const cmd_label_usage[] = { NULL }; -static int cmd_label(int argc, char **argv) +static int cmd_filesystem_label(int argc, char **argv) { - if (check_argc_min(argc, 2) || check_argc_max(argc, 3)) - usage(cmd_label_usage); + clean_args_no_options(argc, argv, cmd_filesystem_label_usage); + + if (check_argc_min(argc - optind, 1) || + check_argc_max(argc - optind, 2)) + usage(cmd_filesystem_label_usage); - if (argc > 2) { - return set_label(argv[1], argv[2]); + if (argc - optind > 1) { + return set_label(argv[optind], argv[optind + 1]); } else { char label[BTRFS_LABEL_SIZE]; int ret; - ret = get_label(argv[1], label); + ret = get_label(argv[optind], label); if (!ret) fprintf(stdout, "%s\n", label); @@ -997,15 +1177,28 @@ static int cmd_label(int argc, char **argv) } } +static const char filesystem_cmd_group_info[] = +"overall filesystem tasks and information"; + 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 }, + filesystem_cmd_group_usage, filesystem_cmd_group_info, { + { "df", cmd_filesystem_df, cmd_filesystem_df_usage, NULL, 0 }, + { "du", cmd_filesystem_du, cmd_filesystem_du_usage, NULL, 0 }, + { "show", cmd_filesystem_show, cmd_filesystem_show_usage, NULL, + 0 }, + { "sync", cmd_filesystem_sync, cmd_filesystem_sync_usage, NULL, + 0 }, + { "defragment", cmd_filesystem_defrag, + cmd_filesystem_defrag_usage, NULL, 0 }, + { "balance", cmd_balance, NULL, &balance_cmd_group, + CMD_HIDDEN }, + { "resize", cmd_filesystem_resize, cmd_filesystem_resize_usage, + NULL, 0 }, + { "label", cmd_filesystem_label, cmd_filesystem_label_usage, + NULL, 0 }, + { "usage", cmd_filesystem_usage, + cmd_filesystem_usage_usage, NULL, 0 }, + NULL_CMD_STRUCT } };