* 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"
/*
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>",
- "Show space usage information for a mount point",
- NULL
+static const char * const cmd_filesystem_df_usage[] = {
+ "btrfs filesystem df [options] <path>",
+ "Show space usage information for a mount point",
+ "-b|--raw raw numbers in bytes",
+ "-h|--human-readable",
+ " human friendly numbers, base 1024 (default)",
+ "-H human friendly numbers, base 1000",
+ "--iec use 1024 as a base (KiB, MiB, GiB, TiB)",
+ "--si use 1000 as a base (kB, MB, GB, TB)",
+ "-k|--kbytes show sizes in KiB, or kB with --si",
+ "-m|--mbytes show sizes in MiB, or MB with --si",
+ "-g|--gbytes show sizes in GiB, or GB with --si",
+ "-t|--tbytes show sizes in TiB, or TB with --si",
+ 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;
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;
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 = UNITS_DEFAULT;
- if (check_argc_exact(argc, 2))
- usage(cmd_df_usage);
+ while (1) {
+ int c;
+ static const struct option long_options[] = {
+ { "raw", no_argument, NULL, 'b'},
+ { "kbytes", no_argument, NULL, 'k'},
+ { "mbytes", no_argument, NULL, 'm'},
+ { "gbytes", no_argument, NULL, 'g'},
+ { "tbytes", no_argument, NULL, 't'},
+ { "si", no_argument, NULL, GETOPT_VAL_SI},
+ { "iec", no_argument, NULL, GETOPT_VAL_IEC},
+ { "human-readable", no_argument, NULL,
+ GETOPT_VAL_HUMAN_READABLE},
+ { NULL, 0, NULL, 0 }
+ };
- path = argv[1];
+ c = getopt_long(argc, argv, "bhHkmgt", long_options, NULL);
+ if (c < 0)
+ break;
+ switch (c) {
+ case 'b':
+ unit_mode = UNITS_RAW;
+ break;
+ case 'k':
+ units_set_base(&unit_mode, UNITS_KBYTES);
+ break;
+ case 'm':
+ units_set_base(&unit_mode, UNITS_MBYTES);
+ break;
+ case 'g':
+ units_set_base(&unit_mode, UNITS_GBYTES);
+ break;
+ case 't':
+ units_set_base(&unit_mode, UNITS_TBYTES);
+ break;
+ case GETOPT_VAL_HUMAN_READABLE:
+ case 'h':
+ unit_mode = UNITS_HUMAN_BINARY;
+ break;
+ case 'H':
+ unit_mode = UNITS_HUMAN_DECIMAL;
+ break;
+ case GETOPT_VAL_SI:
+ units_set_mode(&unit_mode, UNITS_DECIMAL);
+ break;
+ case GETOPT_VAL_IEC:
+ units_set_mode(&unit_mode, UNITS_BINARY);
+ break;
+ default:
+ usage(cmd_filesystem_df_usage);
+ }
+ }
+
+ if (check_argc_exact(argc, optind + 1))
+ usage(cmd_filesystem_df_usage);
+
+ path = argv[optind];
fd = open_file_or_dir(path, &dirstream);
if (fd < 0) {
}
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));
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;
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);
-
- 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");
}
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, char *path, unsigned unit_mode)
{
int i;
+ int fd;
+ int missing = 0;
char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
struct btrfs_ioctl_dev_info_args *tmp_dev_info;
int ret;
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 */
+ 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)
-{
- uuid_t out;
- char path[PATH_MAX];
-
- if (!input)
- return -EINVAL;
-
- 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 (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;
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];
f = setmntent("/proc/self/mounts", "r");
continue;
ret = get_fs_info(mnt->mnt_dir, &fs_info_arg,
&dev_info_arg);
- if (ret)
+ if (ret) {
+ kfree(dev_info_arg);
goto out;
+ }
if (get_label_mounted(mnt->mnt_dir, label)) {
kfree(dev_info_arg);
- ret = 1;
goto out;
}
if (search && !match_search_item_kernel(fs_info_arg.fsid,
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);
+ space_info_arg, label, mnt->mnt_dir,
+ unit_mode);
kfree(space_info_arg);
memset(label, 0, sizeof(label));
+ found = 1;
}
if (fd != -1)
close(fd);
kfree(dev_info_arg);
- if (search)
- ret = 0;
}
- if (search)
- ret = 1;
out:
endmntent(f);
+ return !found;
+}
+
+static int dev_to_fsid(char *dev, __u8 *fsid)
+{
+ struct btrfs_super_block *disk_super;
+ char *buf;
+ int ret;
+ int fd;
+
+ buf = malloc(4096);
+ if (!buf)
+ return -ENOMEM;
+
+ fd = open(dev, O_RDONLY);
+ if (fd < 0) {
+ ret = -errno;
+ free(buf);
+ 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);
+ free(buf);
+ 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 = malloc(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 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,
+ 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_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",
+ "--raw raw numbers in bytes",
+ "--human-readable human friendly numbers, base 1024 (default)",
+ "--iec use 1024 as a base (KiB, MiB, GiB, TiB)",
+ "--si use 1000 as a base (kB, MB, GB, TB)",
+ "--kbytes show sizes in KiB, or kB with --si",
+ "--mbytes show sizes in MiB, or MB with --si",
+ "--gbytes show sizes in GiB, or GB with --si",
+ "--tbytes show sizes in TiB, or TB with --si",
"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;
+ 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 = UNITS_DEFAULT;
+ int found = 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 },
+ { "raw", no_argument, NULL, GETOPT_VAL_RAW},
+ { "kbytes", no_argument, NULL, GETOPT_VAL_KBYTES},
+ { "mbytes", no_argument, NULL, GETOPT_VAL_MBYTES},
+ { "gbytes", no_argument, NULL, GETOPT_VAL_GBYTES},
+ { "tbytes", no_argument, NULL, GETOPT_VAL_TBYTES},
+ { "si", no_argument, NULL, GETOPT_VAL_SI},
+ { "iec", no_argument, NULL, GETOPT_VAL_IEC},
+ { "human-readable", no_argument, NULL,
+ GETOPT_VAL_HUMAN_READABLE},
+ { 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;
+ case GETOPT_VAL_RAW:
+ units_set_mode(&unit_mode, UNITS_RAW);
+ break;
+ case GETOPT_VAL_KBYTES:
+ units_set_base(&unit_mode, UNITS_KBYTES);
+ break;
+ case GETOPT_VAL_MBYTES:
+ units_set_base(&unit_mode, UNITS_MBYTES);
+ break;
+ case GETOPT_VAL_GBYTES:
+ units_set_base(&unit_mode, UNITS_GBYTES);
+ break;
+ case GETOPT_VAL_TBYTES:
+ units_set_base(&unit_mode, UNITS_TBYTES);
+ break;
+ case GETOPT_VAL_SI:
+ units_set_mode(&unit_mode, UNITS_DECIMAL);
+ break;
+ case GETOPT_VAL_IEC:
+ units_set_mode(&unit_mode, UNITS_BINARY);
+ break;
+ case GETOPT_VAL_HUMAN_READABLE:
+ units_set_mode(&unit_mode, UNITS_HUMAN_BINARY);
+ break;
default:
usage(cmd_show_usage);
}
if (strlen(search) == 0)
usage(cmd_show_usage);
type = check_arg_type(search);
- 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;
+
+ /*
+ * 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) {
+ /* 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;
- else
- goto devs_only;
+ 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;
}
}
}
- if (where == BTRFS_SCAN_DEV)
+ if (where == BTRFS_SCAN_LBLKID)
goto devs_only;
/* show mounted btrfs */
- ret = btrfs_scan_kernel(search);
- if (search && !ret)
- return 0;
+ 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);
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) {
+ fprintf(stderr,
+ "ERROR: %d while searching target device\n", 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) {
+ fprintf(stderr,
+ "ERROR: %d while mapping seed devices\n", 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);
+ printf("%s\n", PACKAGE_STRING);
free_seen_fsid();
- return 0;
+ return ret;
}
static const char * const cmd_sync_usage[] = {
"-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 flush = 0;
u64 start = 0;
u64 len = (u64)-1;
- u32 thresh = 0;
+ u64 thresh = 0;
int i;
int recursive = 0;
int ret = 0;
break;
case 't':
thresh = parse_size(optarg);
+ if (thresh > (u32)-1) {
+ fprintf(stderr,
+ "WARNING: target extent size %llu too big, trimmed to %u",
+ thresh, (u32)-1);
+ }
defrag_global_fancy_ioctl = 1;
break;
case 'r':
memset(&defrag_global_range, 0, sizeof(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;
}
}
if (defrag_global_verbose)
- printf("%s\n", BTRFS_BUILD_VERSION);
+ printf("%s\n", PACKAGE_STRING);
if (defrag_global_errors)
fprintf(stderr, "total %d failures\n", defrag_global_errors);
}
static const char * const cmd_resize_usage[] = {
- "btrfs filesystem resize [devid:][+/-]<newsize>[
gkm]|[devid:]max <path>",
+ "btrfs filesystem resize [devid:][+/-]<newsize>[
kKmMgGtTpPeE]|[devid:]max|[devid:]get_min_size <path>",
"Resize a filesystem",
"If 'max' is passed, the filesystem will occupy all available space",
"on the device 'devid'.",
+ "If 'get_min_size' is passed, return the minimum size the device can",
+ "be shrunk to.",
+ "[kK] means KiB, which denotes 1KiB = 1024B, 1MiB = 1024KiB, etc.",
NULL
};
+struct dev_extent_elem {
+ u64 start;
+ /* inclusive end */
+ u64 end;
+ struct list_head list;
+};
+
+static int add_dev_extent(struct list_head *list,
+ const u64 start, const u64 end,
+ const int append)
+{
+ struct dev_extent_elem *e;
+
+ e = malloc(sizeof(*e));
+ if (!e)
+ return -ENOMEM;
+
+ e->start = start;
+ e->end = end;
+
+ if (append)
+ list_add_tail(&e->list, list);
+ else
+ list_add(&e->list, list);
+
+ return 0;
+}
+
+static void free_dev_extent_list(struct list_head *list)
+{
+ while (!list_empty(list)) {
+ struct dev_extent_elem *e;
+
+ e = list_first_entry(list, struct dev_extent_elem, list);
+ list_del(&e->list);
+ free(e);
+ }
+}
+
+static int hole_includes_sb_mirror(const u64 start, const u64 end)
+{
+ int i;
+ int ret = 0;
+
+ for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
+ u64 bytenr = btrfs_sb_offset(i);
+
+ if (bytenr >= start && bytenr <= end) {
+ ret = 1;
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static void adjust_dev_min_size(struct list_head *extents,
+ struct list_head *holes,
+ u64 *min_size)
+{
+ /*
+ * If relocation of the block group of a device extent must happen (see
+ * below) scratch space is used for the relocation. So track here the
+ * size of the largest device extent that has to be relocated. We track
+ * only the largest and not the sum of the sizes of all relocated block
+ * groups because after each block group is relocated the running
+ * transaction is committed so that pinned space is released.
+ */
+ u64 scratch_space = 0;
+
+ /*
+ * List of device extents is sorted by descending order of the extent's
+ * end offset. If some extent goes beyond the computed minimum size,
+ * which initially matches the sum of the lenghts of all extents,
+ * we need to check if the extent can be relocated to an hole in the
+ * device between [0, *min_size[ (which is what the resize ioctl does).
+ */
+ while (!list_empty(extents)) {
+ struct dev_extent_elem *e;
+ struct dev_extent_elem *h;
+ int found = 0;
+ u64 extent_len;
+ u64 hole_len = 0;
+
+ e = list_first_entry(extents, struct dev_extent_elem, list);
+ if (e->end <= *min_size)
+ break;
+
+ /*
+ * Our extent goes beyond the computed *min_size. See if we can
+ * find a hole large enough to relocate it to. If not we must stop
+ * and set *min_size to the end of the extent.
+ */
+ extent_len = e->end - e->start + 1;
+ list_for_each_entry(h, holes, list) {
+ hole_len = h->end - h->start + 1;
+ if (hole_len >= extent_len) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (!found) {
+ *min_size = e->end + 1;
+ break;
+ }
+
+ /*
+ * If the hole found contains the location for a superblock
+ * mirror, we are pessimistic and require allocating one
+ * more extent of the same size. This is because the block
+ * group could be in the worst case used by a single extent
+ * with a size >= (block_group.length - superblock.size).
+ */
+ if (hole_includes_sb_mirror(h->start,
+ h->start + extent_len - 1))
+ *min_size += extent_len;
+
+ if (hole_len > extent_len) {
+ h->start += extent_len;
+ } else {
+ list_del(&h->list);
+ free(h);
+ }
+
+ list_del(&e->list);
+ free(e);
+
+ if (extent_len > scratch_space)
+ scratch_space = extent_len;
+ }
+
+ if (scratch_space) {
+ *min_size += scratch_space;
+ /*
+ * Chunk allocation requires inserting/updating items in the
+ * chunk tree, so often this can lead to the need of allocating
+ * a new system chunk too, which has a maximum size of 32Mb.
+ */
+ *min_size += 32 * 1024 * 1024;
+ }
+}
+
+static int get_min_size(int fd, DIR *dirstream, const char *amount)
+{
+ int ret = 1;
+ char *p = strstr(amount, ":");
+ u64 devid = 1;
+ /*
+ * Device allocations starts at 1Mb or at the value passed through the
+ * mount option alloc_start if it's bigger than 1Mb. The alloc_start
+ * option is used for debugging and testing only, and recently the
+ * possibility of deprecating/removing it has been discussed, so we
+ * ignore it here.
+ */
+ u64 min_size = 1 * 1024 * 1024ull;
+ struct btrfs_ioctl_search_args args;
+ struct btrfs_ioctl_search_key *sk = &args.key;
+ u64 last_pos = (u64)-1;
+ LIST_HEAD(extents);
+ LIST_HEAD(holes);
+
+ if (p && sscanf(amount, "%llu:get_min_size", &devid) != 1) {
+ fprintf(stderr, "Invalid parameter: %s\n", amount);
+ goto out;
+ }
+
+ memset(&args, 0, sizeof(args));
+ sk->tree_id = BTRFS_DEV_TREE_OBJECTID;
+ sk->min_objectid = devid;
+ sk->max_objectid = devid;
+ sk->max_type = BTRFS_DEV_EXTENT_KEY;
+ sk->min_type = BTRFS_DEV_EXTENT_KEY;
+ sk->min_offset = 0;
+ sk->max_offset = (u64)-1;
+ sk->min_transid = 0;
+ sk->max_transid = (u64)-1;
+ sk->nr_items = 4096;
+
+ while (1) {
+ int i;
+ struct btrfs_ioctl_search_header *sh;
+ unsigned long off = 0;
+
+ ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
+ if (ret < 0) {
+ fprintf(stderr,
+ "Error invoking tree search ioctl: %s\n",
+ strerror(errno));
+ ret = 1;
+ goto out;
+ }
+
+ if (sk->nr_items == 0)
+ break;
+
+ for (i = 0; i < sk->nr_items; i++) {
+ struct btrfs_dev_extent *extent;
+ u64 len;
+
+ sh = (struct btrfs_ioctl_search_header *)(args.buf +
+ off);
+ off += sizeof(*sh);
+ extent = (struct btrfs_dev_extent *)(args.buf + off);
+ off += sh->len;
+
+ sk->min_objectid = sh->objectid;
+ sk->min_type = sh->type;
+ sk->min_offset = sh->offset + 1;
+
+ if (sh->objectid != devid ||
+ sh->type != BTRFS_DEV_EXTENT_KEY)
+ continue;
+
+ len = btrfs_stack_dev_extent_length(extent);
+ min_size += len;
+ ret = add_dev_extent(&extents, sh->offset,
+ sh->offset + len - 1, 0);
+
+ if (!ret && last_pos != (u64)-1 &&
+ last_pos != sh->offset)
+ ret = add_dev_extent(&holes, last_pos,
+ sh->offset - 1, 1);
+ if (ret) {
+ fprintf(stderr, "Error: %s\n", strerror(-ret));
+ ret = 1;
+ goto out;
+ }
+
+ last_pos = sh->offset + len;
+ }
+
+ if (sk->min_type != BTRFS_DEV_EXTENT_KEY ||
+ sk->min_objectid != devid)
+ break;
+ }
+
+ adjust_dev_min_size(&extents, &holes, &min_size);
+ printf("%llu bytes (%s)\n", min_size, pretty_size(min_size));
+ ret = 0;
+out:
+ close_file_or_dir(fd, dirstream);
+ free_dev_extent_list(&extents);
+ free_dev_extent_list(&holes);
+
+ return ret;
+}
+
static int cmd_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);
return 1;
}
+ res = stat(path, &st);
+ if (res < 0) {
+ fprintf(stderr, "ERROR: resize: cannot stat %s: %s\n",
+ path, strerror(errno));
+ return 1;
+ }
+ if (!S_ISDIR(st.st_mode)) {
+ fprintf(stderr,
+ "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 = open_file_or_dir(path, &dirstream);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", path);
return 1;
}
+ if (strstr(amount, "get_min_size"))
+ return get_min_size(fd, dirstream, amount);
+
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;
fprintf(stderr, "ERROR: unable to resize '%s' - %s\n",
path, strerror(e));
return 1;
+ } else if (res > 0) {
+ const char *err_str = btrfs_err_str(res);
+
+ if (err_str) {
+ fprintf(stderr, "ERROR: btrfs error resizing '%s' - %s\n",
+ path, err_str);
+ } else {
+ fprintf(stderr,
+ "ERROR: btrfs error resizing '%s' - unknown btrfs_err_code %d\n",
+ path, res);
+ }
+ return 1;
}
return 0;
}
}
}
+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 },
+ filesystem_cmd_group_usage, filesystem_cmd_group_info, {
+ { "df", cmd_filesystem_df, cmd_filesystem_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 },
+ { "balance", cmd_balance, NULL, &balance_cmd_group, CMD_HIDDEN },
{ "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
{ "label", cmd_label, cmd_label_usage, NULL, 0 },
+ { "usage", cmd_filesystem_usage,
+ cmd_filesystem_usage_usage, NULL, 0 },
+
NULL_CMD_STRUCT
}
};
projects / platform / upstream / btrfs-progs.git / blobdiff