* Boston, MA 021110-1307, USA.
*/
-#define _XOPEN_SOURCE 500
#include <stdio.h>
#include <stdlib.h>
#include <string.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 "cmds-fi-du.h"
/*
* for btrfs fi show, we maintain a hash of fsids we've already printed.
static struct seen_fsid *seen_fsid_hash[SEEN_FSID_HASH_SIZE] = {NULL,};
+static int is_seen_fsid(u8 *fsid)
+{
+ u8 hash = fsid[0];
+ int slot = hash % SEEN_FSID_HASH_SIZE;
+ struct seen_fsid *seen = seen_fsid_hash[slot];
+
+ return seen ? 1 : 0;
+}
+
static int add_seen_fsid(u8 *fsid)
{
u8 hash = fsid[0];
NULL
};
-static const char * const cmd_df_usage[] = {
- "btrfs filesystem df <path>",
+static const char * const cmd_filesystem_df_usage[] = {
+ "btrfs filesystem df [options] <path>",
"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));
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: %s\n", strerror(errno));
free(sargs);
- return -e;
+ return -errno;
}
/* This really should never happen */
if (!sargs->total_spaces) {
sargs = malloc(sizeof(struct btrfs_ioctl_space_args) +
(count * sizeof(struct btrfs_ioctl_space_info)));
if (!sargs)
- ret = -ENOMEM;
+ 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: get space info count %llu - %s\n",
- count, strerror(e));
+ if (ret < 0) {
+ error("cannot get space info with %llu slots: %s",
+ count, strerror(errno));
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;
- if (check_argc_exact(argc, 2))
- usage(cmd_df_usage);
+ unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
- path = argv[1];
+ clean_args_no_options(argc, argv, cmd_filesystem_df_usage);
- fd = open_file_or_dir(path, &dirstream);
- if (fd < 0) {
- fprintf(stderr, "ERROR: can't access to '%s'\n", path);
+ if (check_argc_exact(argc - optind, 1))
+ usage(cmd_filesystem_df_usage);
+
+ path = argv[optind];
+
+ fd = btrfs_open_dir(path, &dirstream, 1);
+ if (fd < 0)
return 1;
- }
+
ret = get_df(fd, &sargs);
- if (!ret && sargs) {
- print_df(sargs);
+ if (ret == 0) {
+ 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,
+ char *search)
+{
+ char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
+ int search_len = strlen(search);
+
+ search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
+ uuid_unparse(fsid, uuidbuf);
+ if (!strncmp(uuidbuf, search, search_len))
+ return 1;
+
+ if (*label && strcmp(label, search) == 0)
+ return 1;
+
+ if (strcmp(mnt, search) == 0)
+ return 1;
+
+ return 0;
+}
+
static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
{
- char uuidbuf[37];
+ char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
struct list_head *cur;
struct btrfs_device *device;
int search_len = strlen(search);
- search_len = min(search_len, 37);
+ search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
uuid_unparse(fs_devices->fsid, uuidbuf);
if (!strncmp(uuidbuf, search, search_len))
return 1;
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)
{
- char uuidbuf[37];
- struct list_head *cur;
+ 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 btrfs_device *device;
u64 devs_found = 0;
u64 total;
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));
+ pretty_size_mode(device->super_bytes_used, unit_mode));
- 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);
+ print_devices(fs_devices, &devs_found, 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);
-
- devs_found++;
- }
if (devs_found < total) {
printf("\t*** Some devices missing\n");
}
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;
- char uuidbuf[37];
+ int fd;
+ int missing = 0;
+ char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
struct btrfs_ioctl_dev_info_args *tmp_dev_info;
int ret;
return ret;
uuid_unparse(fs_info->fsid, uuidbuf);
- printf("Label: %s uuid: %s\n",
- strlen(label) ? label : "none", uuidbuf);
+ if (label && *label)
+ printf("Label: '%s' ", label);
+ else
+ printf("Label: none ");
- printf("\tTotal devices %llu FS bytes used %s\n",
- fs_info->num_devices,
- pretty_size(calc_used_bytes(space_info)));
+ printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
+ fs_info->num_devices,
+ 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];
- printf("\tdevid %llu size %s used %s path %s\n",
+
+ /* Add check for missing devices even mounted */
+ fd = open((char *)tmp_dev_info->path, O_RDONLY);
+ if (fd < 0) {
+ missing = 1;
+ 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)
+ printf("\t*** Some devices missing\n");
printf("\n");
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)
+static int btrfs_scan_kernel(void *search, unsigned unit_mode)
{
- uuid_t out;
- char path[PATH_MAX];
-
- if (!input)
- return BTRFS_ARG_UNKNOWN;
-
- if (realpath(input, path)) {
- if (is_block_device(input) == 1)
- return BTRFS_ARG_BLKDEV;
-
- if (is_mount_point(input) == 1)
- return BTRFS_ARG_MNTPOINT;
-
- return BTRFS_ARG_UNKNOWN;
- }
-
- if (!uuid_parse(input, out))
- return BTRFS_ARG_UUID;
-
- return BTRFS_ARG_UNKNOWN;
-}
-
-static int btrfs_scan_kernel(void *search)
-{
- int ret = 0, fd, type;
+ int ret = 0, fd;
+ int found = 0;
FILE *f;
struct mntent *mnt;
struct btrfs_ioctl_fs_info_args fs_info_arg;
struct btrfs_ioctl_dev_info_args *dev_info_arg = NULL;
- struct btrfs_ioctl_space_args *space_info_arg;
+ struct btrfs_ioctl_space_args *space_info_arg = NULL;
char label[BTRFS_LABEL_SIZE];
- uuid_t uuid;
f = setmntent("/proc/self/mounts", "r");
if (f == NULL)
return 1;
- type = check_arg_type(search);
- if (type == BTRFS_ARG_BLKDEV)
- return 1;
-
+ memset(label, 0, sizeof(label));
while ((mnt = getmntent(f)) != NULL) {
if (strcmp(mnt->mnt_type, "btrfs"))
continue;
ret = get_fs_info(mnt->mnt_dir, &fs_info_arg,
&dev_info_arg);
- if (ret)
- return ret;
-
- switch (type) {
- case BTRFS_ARG_UUID:
- ret = uuid_parse(search, uuid);
- if (ret)
- return 1;
- if (uuid_compare(fs_info_arg.fsid, uuid))
- continue;
- break;
- case BTRFS_ARG_MNTPOINT:
- if (strcmp(search, mnt->mnt_dir))
- continue;
- break;
- case BTRFS_ARG_UNKNOWN:
- break;
+ if (ret) {
+ kfree(dev_info_arg);
+ goto out;
+ }
+
+ /* skip all fs already shown as mounted fs */
+ if (is_seen_fsid(fs_info_arg.fsid))
+ 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) {
+ kfree(dev_info_arg);
+ goto out;
+ }
+ if (search && !match_search_item_kernel(fs_info_arg.fsid,
+ mnt->mnt_dir, label, search)) {
+ kfree(dev_info_arg);
+ dev_info_arg = NULL;
+ continue;
}
fd = open(mnt->mnt_dir, O_RDONLY);
if ((fd != -1) && !get_df(fd, &space_info_arg)) {
- get_label_mounted(mnt->mnt_dir, label);
print_one_fs(&fs_info_arg, dev_info_arg,
- space_info_arg, label, mnt->mnt_dir);
- free(space_info_arg);
+ space_info_arg, label, unit_mode);
+ kfree(space_info_arg);
+ memset(label, 0, sizeof(label));
+ found = 1;
}
if (fd != -1)
close(fd);
- free(dev_info_arg);
+ kfree(dev_info_arg);
+ dev_info_arg = NULL;
+ }
+
+out:
+ endmntent(f);
+ return !found;
+}
+
+static int dev_to_fsid(char *dev, __u8 *fsid)
+{
+ struct btrfs_super_block *disk_super;
+ char buf[BTRFS_SUPER_INFO_SIZE];
+ int ret;
+ int fd;
+
+ fd = open(dev, O_RDONLY);
+ if (fd < 0) {
+ ret = -errno;
+ return ret;
+ }
+
+ disk_super = (struct btrfs_super_block *)buf;
+ ret = btrfs_read_dev_super(fd, disk_super,
+ BTRFS_SUPER_INFO_OFFSET, 0);
+ if (ret)
+ goto out;
+
+ memcpy(fsid, disk_super->fsid, BTRFS_FSID_SIZE);
+ ret = 0;
+
+out:
+ close(fd);
+ return ret;
+}
+
+static void free_fs_devices(struct btrfs_fs_devices *fs_devices)
+{
+ struct btrfs_fs_devices *cur_seed, *next_seed;
+ struct btrfs_device *device;
+
+ while (!list_empty(&fs_devices->devices)) {
+ device = list_entry(fs_devices->devices.next,
+ struct btrfs_device, dev_list);
+ list_del(&device->dev_list);
+
+ free(device->name);
+ free(device->label);
+ free(device);
+ }
+
+ /* 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);
+
+ 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))
+ 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:
return ret;
}
-static const char * const cmd_show_usage[] = {
- "btrfs filesystem show [options|<path>|<uuid>]",
+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] [<path>|<uuid>|<device>|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];
+ 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 (where == BTRFS_SCAN_LBLKID) {
- if (check_argc_max(argc, optind + 1))
- usage(cmd_show_usage);
- } else {
- if (check_argc_max(argc, optind))
- usage(cmd_show_usage);
- }
+ if (check_argc_max(argc, optind + 1))
+ usage(cmd_filesystem_show_usage);
+
if (argc > optind) {
search = argv[optind];
+ if (*search == 0)
+ usage(cmd_filesystem_show_usage);
type = check_arg_type(search);
- if (type == BTRFS_ARG_UNKNOWN) {
- fprintf(stderr, "ERROR: arg type unknown\n");
- usage(cmd_show_usage);
- }
- if (type == BTRFS_ARG_BLKDEV) {
+
+ /*
+ * 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 (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 == 0)
+ if (!ret) {
+ /* given block dev is mounted */
search = mp;
+ type = BTRFS_ARG_MNTPOINT;
+ } else {
+ 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 */
- btrfs_scan_kernel(search);
+ ret = btrfs_scan_kernel(search, unit_mode);
+ if (search && !ret) {
+ /* since search is found we are done */
+ goto out;
+ }
/* shows mounted only */
if (where == BTRFS_SCAN_MOUNTED)
goto out;
devs_only:
- ret = scan_for_btrfs(where, !BTRFS_UPDATE_KERNEL);
+ ret = btrfs_scan_lblkid();
if (ret) {
- fprintf(stderr, "ERROR: %d while scanning\n", ret);
+ error("blkid device scan returned %d\n", 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);
+ 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;
+ }
+
+ list_for_each_entry(fs_devices, &all_uuids, list)
+ print_one_uuid(fs_devices, unit_mode);
+
+ if (search && !found)
+ ret = 1;
+
+ while (!list_empty(&all_uuids)) {
+ fs_devices = list_entry(all_uuids.next,
+ struct btrfs_fs_devices, list);
+ free_fs_devices(fs_devices);
+ }
out:
- printf("%s\n", BTRFS_BUILD_VERSION);
free_seen_fsid();
- return 0;
+ return ret;
}
-static const char * const cmd_sync_usage[] = {
+static const char * const cmd_filesystem_sync_usage[] = {
"btrfs filesystem sync <path>",
"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;
- if (check_argc_exact(argc, 2))
- usage(cmd_sync_usage);
+ clean_args_no_options(argc, argv, cmd_filesystem_sync_usage);
- path = argv[1];
+ if (check_argc_exact(argc - optind, 1))
+ usage(cmd_filesystem_sync_usage);
- fd = open_file_or_dir(path, &dirstream);
- if (fd < 0) {
- fprintf(stderr, "ERROR: can't access to '%s'\n", path);
+ path = argv[optind];
+
+ fd = btrfs_open_dir(path, &dirstream, 1);
+ if (fd < 0)
return 1;
- }
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));
+ error("sync ioctl failed on '%s': %s", path, strerror(e));
return 1;
}
else if (strcmp(optarg, "lzo") == 0)
return BTRFS_COMPRESS_LZO;
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] <file>|<dir> [<file>|<dir>...]",
"Defragment a file or a directory",
"",
"-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",
+ "-t size target extent size hint",
NULL
};
int e = 0;
int fd = 0;
- if (typeflag == FTW_F) {
+ 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)
goto error;
ret = do_defrag(fd, defrag_global_fancy_ioctl, &defrag_global_range);
e = errno;
close(fd);
- if (ret && e == ENOTTY) {
- fprintf(stderr, "ERROR: defrag range ioctl not "
+ if (ret && e == ENOTTY && defrag_global_fancy_ioctl) {
+ error("defrag range ioctl not "
"supported in this kernel, please try "
- "without any options.\n");
+ "without any options.");
defrag_global_errors++;
return ENOTTY;
}
return 0;
error:
- fprintf(stderr, "ERROR: defrag failed on %s - %s\n", fpath, strerror(e));
+ error("defrag failed on %s: %s", fpath, strerror(e));
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 = 0;
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;
break;
case 't':
thresh = parse_size(optarg);
+ if (thresh > (u32)-1) {
+ warning(
+ "target extent size %llu too big, trimmed to %u",
+ thresh, (u32)-1);
+ thresh = (u32)-1;
+ }
defrag_global_fancy_ioctl = 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;
defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
for (i = optind; i < argc; i++) {
+ struct stat st;
+
dirstream = NULL;
fd = open_file_or_dir(argv[i], &dirstream);
if (fd < 0) {
- fprintf(stderr, "ERROR: failed to open %s - %s\n", argv[i],
+ error("cannot open %s: %s\n", argv[i],
strerror(errno));
defrag_global_errors++;
close_file_or_dir(fd, dirstream);
continue;
}
+ if (fstat(fd, &st)) {
+ error("failed to stat %s: %s",
+ argv[i], strerror(errno));
+ defrag_global_errors++;
+ close_file_or_dir(fd, dirstream);
+ continue;
+ }
+ if (!(S_ISDIR(st.st_mode) || S_ISREG(st.st_mode))) {
+ error("%s is not a directory or a regular file\n",
+ argv[i]);
+ defrag_global_errors++;
+ close_file_or_dir(fd, dirstream);
+ continue;
+ }
if (recursive) {
- struct stat st;
-
- 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;
- }
if (S_ISDIR(st.st_mode)) {
ret = nftw(argv[i], defrag_callback, 10,
FTW_MOUNT | FTW_PHYS);
e = errno;
}
close_file_or_dir(fd, dirstream);
- if (ret && e == ENOTTY) {
- fprintf(stderr, "ERROR: defrag range ioctl not "
+ if (ret && e == ENOTTY && defrag_global_fancy_ioctl) {
+ error("defrag range ioctl not "
"supported in this kernel, please try "
- "without any options.\n");
+ "without any options.");
defrag_global_errors++;
break;
}
if (ret) {
- fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
- argv[i], strerror(e));
+ error("defrag failed on %s: %s", argv[i], strerror(e));
defrag_global_errors++;
}
}
- 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[] = {
- "btrfs filesystem resize [devid:][+/-]<newsize>[gkm]|[devid:]max <path>",
+static const char * const cmd_filesystem_resize_usage[] = {
+ "btrfs filesystem resize [devid:][+/-]<newsize>[kKmMgGtTpPeE]|[devid:]max <path>",
"Resize a filesystem",
"If 'max' is passed, the filesystem will occupy all available space",
"on the device 'devid'.",
+ "[kK] means KiB, which denotes 1KiB = 1024B, 1MiB = 1024KiB, etc.",
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(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 to '%s'\n", path);
+ res = stat(path, &st);
+ if (res < 0) {
+ error("resize: cannot stat %s: %s", path, strerror(errno));
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': %s", path, strerror(e));
+ 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 [<device>|<mount_point>] [<newlabel>]",
"Get or change the label of a filesystem",
"With one argument, get the label of filesystem on <device>.",
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 (argc > 2)
- return set_label(argv[1], argv[2]);
- else
- return get_label(argv[1]);
+ if (check_argc_min(argc - optind, 2) ||
+ check_argc_max(argc - optind, 3))
+ usage(cmd_filesystem_label_usage);
+
+ if (argc - optind > 2) {
+ return set_label(argv[optind], argv[optind + 1]);
+ } else {
+ char label[BTRFS_LABEL_SIZE];
+ int ret;
+
+ ret = get_label(argv[optind], label);
+ if (!ret)
+ fprintf(stdout, "%s\n", label);
+
+ return ret;
+ }
}
+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
}
};