mirror of
https://github.com/kdave/btrfs-progs
synced 2024-12-09 08:00:13 +00:00
e4df433b8a
As btrfs is specific to Linux, %m can be used instead of strerror(errno) in format strings. This has some size reduction benefits for embedded systems. glibc, musl, and uclibc-ng all support %m as a modifier to printf. A quick glance at the BIONIC libc source indicates that it has support for %m as well. BSDs and Windows do not but I do believe them to be beyond the scope of btrfs-progs. Compiled sizes on Ubuntu 16.04: Before: 3916512 btrfs 233688 libbtrfs.so.0.1 4899 bcp 2367672 btrfs-convert 2208488 btrfs-corrupt-block 13302 btrfs-debugfs 2152160 btrfs-debug-tree 2136024 btrfs-find-root 2287592 btrfs-image 2144600 btrfs-map-logical 2130760 btrfs-select-super 2152608 btrfstune 2131760 btrfs-zero-log 2277752 mkfs.btrfs 9166 show-blocks After: 3908744 btrfs 233256 libbtrfs.so.0.1 4899 bcp 2366560 btrfs-convert 2207432 btrfs-corrupt-block 13302 btrfs-debugfs 2151104 btrfs-debug-tree 2134968 btrfs-find-root 2281864 btrfs-image 2143536 btrfs-map-logical 2129704 btrfs-select-super 2151552 btrfstune 2130696 btrfs-zero-log 2276272 mkfs.btrfs 9166 show-blocks Total savings: 23928 (24 kilo)bytes Signed-off-by: Rosen Penev <rosenp@gmail.com> Signed-off-by: David Sterba <dsterba@suse.com>
1217 lines
29 KiB
C
1217 lines
29 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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#include <uuid/uuid.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <ftw.h>
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#include <mntent.h>
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#include <linux/limits.h>
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#include <getopt.h>
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#include "kerncompat.h"
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#include "ctree.h"
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#include "utils.h"
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#include "volumes.h"
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#include "commands.h"
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#include "cmds-fi-usage.h"
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#include "list_sort.h"
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#include "disk-io.h"
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#include "help.h"
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/*
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* for btrfs fi show, we maintain a hash of fsids we've already printed.
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* This way we don't print dups if a given FS is mounted more than once.
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*/
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static struct seen_fsid *seen_fsid_hash[SEEN_FSID_HASH_SIZE] = {NULL,};
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static const char * const filesystem_cmd_group_usage[] = {
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"btrfs filesystem [<group>] <command> [<args>]",
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NULL
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};
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static const char * const cmd_filesystem_df_usage[] = {
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"btrfs filesystem df [options] <path>",
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"Show space usage information for a mount point",
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HELPINFO_UNITS_SHORT_LONG,
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NULL
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};
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static int get_df(int fd, struct btrfs_ioctl_space_args **sargs_ret)
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{
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u64 count = 0;
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int ret;
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struct btrfs_ioctl_space_args *sargs;
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sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
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if (!sargs)
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return -ENOMEM;
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sargs->space_slots = 0;
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sargs->total_spaces = 0;
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ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
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if (ret < 0) {
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error("cannot get space info: %m");
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free(sargs);
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return -errno;
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}
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/* This really should never happen */
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if (!sargs->total_spaces) {
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free(sargs);
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return -ENOENT;
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}
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count = sargs->total_spaces;
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free(sargs);
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sargs = malloc(sizeof(struct btrfs_ioctl_space_args) +
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(count * sizeof(struct btrfs_ioctl_space_info)));
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if (!sargs)
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return -ENOMEM;
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sargs->space_slots = count;
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sargs->total_spaces = 0;
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ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
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if (ret < 0) {
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error("cannot get space info with %llu slots: %m",
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count);
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free(sargs);
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return -errno;
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}
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*sargs_ret = sargs;
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return 0;
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}
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static void print_df(struct btrfs_ioctl_space_args *sargs, unsigned unit_mode)
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{
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u64 i;
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struct btrfs_ioctl_space_info *sp = sargs->spaces;
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for (i = 0; i < sargs->total_spaces; i++, sp++) {
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printf("%s, %s: total=%s, used=%s\n",
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btrfs_group_type_str(sp->flags),
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btrfs_group_profile_str(sp->flags),
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pretty_size_mode(sp->total_bytes, unit_mode),
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pretty_size_mode(sp->used_bytes, unit_mode));
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}
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}
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static int cmd_filesystem_df(int argc, char **argv)
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{
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struct btrfs_ioctl_space_args *sargs = NULL;
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int ret;
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int fd;
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char *path;
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DIR *dirstream = NULL;
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unsigned unit_mode;
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unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
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clean_args_no_options(argc, argv, cmd_filesystem_df_usage);
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if (check_argc_exact(argc - optind, 1))
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usage(cmd_filesystem_df_usage);
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path = argv[optind];
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fd = btrfs_open_dir(path, &dirstream, 1);
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if (fd < 0)
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return 1;
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ret = get_df(fd, &sargs);
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if (ret == 0) {
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print_df(sargs, unit_mode);
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free(sargs);
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} else {
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error("get_df failed %s", strerror(-ret));
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}
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close_file_or_dir(fd, dirstream);
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return !!ret;
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}
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static int match_search_item_kernel(u8 *fsid, char *mnt, char *label,
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char *search)
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{
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char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
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int search_len = strlen(search);
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search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
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uuid_unparse(fsid, uuidbuf);
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if (!strncmp(uuidbuf, search, search_len))
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return 1;
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if (*label && strcmp(label, search) == 0)
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return 1;
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if (strcmp(mnt, search) == 0)
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return 1;
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return 0;
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}
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static int uuid_search(struct btrfs_fs_devices *fs_devices, const char *search)
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{
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char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
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struct btrfs_device *device;
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int search_len = strlen(search);
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search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
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uuid_unparse(fs_devices->fsid, uuidbuf);
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if (!strncmp(uuidbuf, search, search_len))
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return 1;
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list_for_each_entry(device, &fs_devices->devices, dev_list) {
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if ((device->label && strcmp(device->label, search) == 0) ||
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strcmp(device->name, search) == 0)
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return 1;
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}
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return 0;
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}
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/*
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* Sort devices by devid, ascending
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*/
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static int cmp_device_id(void *priv, struct list_head *a,
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struct list_head *b)
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{
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const struct btrfs_device *da = list_entry(a, struct btrfs_device,
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dev_list);
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const struct btrfs_device *db = list_entry(b, struct btrfs_device,
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dev_list);
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return da->devid < db->devid ? -1 :
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da->devid > db->devid ? 1 : 0;
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}
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static void splice_device_list(struct list_head *seed_devices,
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struct list_head *all_devices)
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{
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struct btrfs_device *in_all, *next_all;
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struct btrfs_device *in_seed, *next_seed;
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list_for_each_entry_safe(in_all, next_all, all_devices, dev_list) {
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list_for_each_entry_safe(in_seed, next_seed, seed_devices,
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dev_list) {
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if (in_all->devid == in_seed->devid) {
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/*
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* When do dev replace in a sprout fs
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* to a dev in its seed fs, the replacing
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* dev will reside in the sprout fs and
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* the replaced dev will still exist
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* in the seed fs.
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* So pick the latest one when showing
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* the sprout fs.
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*/
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if (in_all->generation
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< in_seed->generation) {
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list_del(&in_all->dev_list);
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free(in_all);
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} else if (in_all->generation
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> in_seed->generation) {
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list_del(&in_seed->dev_list);
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free(in_seed);
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}
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break;
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}
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}
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}
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list_splice(seed_devices, all_devices);
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}
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static void print_devices(struct btrfs_fs_devices *fs_devices,
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u64 *devs_found, unsigned unit_mode)
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{
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struct btrfs_device *device;
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struct btrfs_fs_devices *cur_fs;
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struct list_head *all_devices;
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all_devices = &fs_devices->devices;
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cur_fs = fs_devices->seed;
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/* add all devices of seed fs to the fs to be printed */
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while (cur_fs) {
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splice_device_list(&cur_fs->devices, all_devices);
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cur_fs = cur_fs->seed;
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}
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list_sort(NULL, all_devices, cmp_device_id);
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list_for_each_entry(device, all_devices, dev_list) {
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printf("\tdevid %4llu size %s used %s path %s\n",
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(unsigned long long)device->devid,
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pretty_size_mode(device->total_bytes, unit_mode),
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pretty_size_mode(device->bytes_used, unit_mode),
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device->name);
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(*devs_found)++;
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}
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}
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static void print_one_uuid(struct btrfs_fs_devices *fs_devices,
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unsigned unit_mode)
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{
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char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
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struct btrfs_device *device;
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u64 devs_found = 0;
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u64 total;
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if (add_seen_fsid(fs_devices->fsid, seen_fsid_hash, -1, NULL))
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return;
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uuid_unparse(fs_devices->fsid, uuidbuf);
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device = list_entry(fs_devices->devices.next, struct btrfs_device,
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dev_list);
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if (device->label && device->label[0])
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printf("Label: '%s' ", device->label);
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else
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printf("Label: none ");
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total = device->total_devs;
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printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
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(unsigned long long)total,
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pretty_size_mode(device->super_bytes_used, unit_mode));
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print_devices(fs_devices, &devs_found, unit_mode);
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if (devs_found < total) {
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printf("\t*** Some devices missing\n");
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}
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printf("\n");
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}
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/* adds up all the used spaces as reported by the space info ioctl
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*/
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static u64 calc_used_bytes(struct btrfs_ioctl_space_args *si)
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{
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u64 ret = 0;
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int i;
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for (i = 0; i < si->total_spaces; i++)
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ret += si->spaces[i].used_bytes;
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return ret;
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}
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static int print_one_fs(struct btrfs_ioctl_fs_info_args *fs_info,
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struct btrfs_ioctl_dev_info_args *dev_info,
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struct btrfs_ioctl_space_args *space_info,
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char *label, unsigned unit_mode)
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{
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int i;
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int fd;
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int missing = 0;
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char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
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struct btrfs_ioctl_dev_info_args *tmp_dev_info;
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int ret;
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ret = add_seen_fsid(fs_info->fsid, seen_fsid_hash, -1, NULL);
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if (ret == -EEXIST)
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return 0;
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else if (ret)
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return ret;
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uuid_unparse(fs_info->fsid, uuidbuf);
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if (label && *label)
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printf("Label: '%s' ", label);
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else
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printf("Label: none ");
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printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
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fs_info->num_devices,
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pretty_size_mode(calc_used_bytes(space_info),
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unit_mode));
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for (i = 0; i < fs_info->num_devices; i++) {
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char *canonical_path;
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tmp_dev_info = (struct btrfs_ioctl_dev_info_args *)&dev_info[i];
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/* Add check for missing devices even mounted */
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fd = open((char *)tmp_dev_info->path, O_RDONLY);
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if (fd < 0) {
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missing = 1;
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continue;
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}
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close(fd);
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canonical_path = canonicalize_path((char *)tmp_dev_info->path);
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printf("\tdevid %4llu size %s used %s path %s\n",
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tmp_dev_info->devid,
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pretty_size_mode(tmp_dev_info->total_bytes, unit_mode),
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pretty_size_mode(tmp_dev_info->bytes_used, unit_mode),
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canonical_path);
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free(canonical_path);
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}
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if (missing)
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printf("\t*** Some devices missing\n");
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printf("\n");
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return 0;
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}
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static int btrfs_scan_kernel(void *search, unsigned unit_mode)
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{
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int ret = 0, fd;
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int found = 0;
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FILE *f;
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struct mntent *mnt;
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struct btrfs_ioctl_fs_info_args fs_info_arg;
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struct btrfs_ioctl_dev_info_args *dev_info_arg = NULL;
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struct btrfs_ioctl_space_args *space_info_arg = NULL;
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char label[BTRFS_LABEL_SIZE];
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f = setmntent("/proc/self/mounts", "r");
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if (f == NULL)
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return 1;
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memset(label, 0, sizeof(label));
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while ((mnt = getmntent(f)) != NULL) {
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free(dev_info_arg);
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dev_info_arg = NULL;
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if (strcmp(mnt->mnt_type, "btrfs"))
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continue;
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ret = get_fs_info(mnt->mnt_dir, &fs_info_arg,
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&dev_info_arg);
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if (ret)
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goto out;
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/* skip all fs already shown as mounted fs */
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if (is_seen_fsid(fs_info_arg.fsid, seen_fsid_hash))
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continue;
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ret = get_label_mounted(mnt->mnt_dir, label);
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/* provide backward kernel compatibility */
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if (ret == -ENOTTY)
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ret = get_label_unmounted(
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(const char *)dev_info_arg->path, label);
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if (ret)
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goto out;
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if (search && !match_search_item_kernel(fs_info_arg.fsid,
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mnt->mnt_dir, label, search)) {
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continue;
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}
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fd = open(mnt->mnt_dir, O_RDONLY);
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if ((fd != -1) && !get_df(fd, &space_info_arg)) {
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print_one_fs(&fs_info_arg, dev_info_arg,
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space_info_arg, label, unit_mode);
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free(space_info_arg);
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memset(label, 0, sizeof(label));
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found = 1;
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}
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if (fd != -1)
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close(fd);
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}
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out:
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free(dev_info_arg);
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endmntent(f);
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return !found;
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}
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static void free_fs_devices(struct btrfs_fs_devices *fs_devices)
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{
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struct btrfs_fs_devices *cur_seed, *next_seed;
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struct btrfs_device *device;
|
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while (!list_empty(&fs_devices->devices)) {
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device = list_entry(fs_devices->devices.next,
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struct btrfs_device, dev_list);
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list_del(&device->dev_list);
|
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free(device->name);
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free(device->label);
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free(device);
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}
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|
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/* free seed fs chain */
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cur_seed = fs_devices->seed;
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fs_devices->seed = NULL;
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while (cur_seed) {
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next_seed = cur_seed->seed;
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|
free(cur_seed);
|
|
|
|
cur_seed = next_seed;
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}
|
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|
|
list_del(&fs_devices->list);
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free(fs_devices);
|
|
}
|
|
|
|
static int copy_device(struct btrfs_device *dst,
|
|
struct btrfs_device *src)
|
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{
|
|
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;
|
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|
|
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, 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:
|
|
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, 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_filesystem_show(int argc, char **argv)
|
|
{
|
|
LIST_HEAD(all_uuids);
|
|
struct btrfs_fs_devices *fs_devices;
|
|
char *search = NULL;
|
|
int ret;
|
|
/* default, search both kernel and udev */
|
|
int where = -1;
|
|
int type = 0;
|
|
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 c;
|
|
static const struct option long_options[] = {
|
|
{ "all-devices", no_argument, NULL, 'd'},
|
|
{ "mounted", no_argument, NULL, 'm'},
|
|
{ NULL, 0, NULL, 0 }
|
|
};
|
|
|
|
c = getopt_long(argc, argv, "dm", long_options, NULL);
|
|
if (c < 0)
|
|
break;
|
|
switch (c) {
|
|
case 'd':
|
|
where = BTRFS_SCAN_LBLKID;
|
|
break;
|
|
case 'm':
|
|
where = BTRFS_SCAN_MOUNTED;
|
|
break;
|
|
default:
|
|
usage(cmd_filesystem_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);
|
|
|
|
/*
|
|
* 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 = 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_LBLKID)
|
|
goto devs_only;
|
|
|
|
/* show mounted btrfs */
|
|
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 = btrfs_scan_devices();
|
|
|
|
if (ret) {
|
|
error("blkid device scan returned %d", ret);
|
|
return 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;
|
|
}
|
|
|
|
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);
|
|
free_fs_devices(fs_devices);
|
|
}
|
|
out:
|
|
free_seen_fsid(seen_fsid_hash);
|
|
return ret;
|
|
}
|
|
|
|
static const char * const cmd_filesystem_sync_usage[] = {
|
|
"btrfs filesystem sync <path>",
|
|
"Force a sync on a filesystem",
|
|
NULL
|
|
};
|
|
|
|
static int cmd_filesystem_sync(int argc, char **argv)
|
|
{
|
|
int fd, res;
|
|
char *path;
|
|
DIR *dirstream = NULL;
|
|
|
|
clean_args_no_options(argc, argv, cmd_filesystem_sync_usage);
|
|
|
|
if (check_argc_exact(argc - optind, 1))
|
|
usage(cmd_filesystem_sync_usage);
|
|
|
|
path = argv[optind];
|
|
|
|
fd = btrfs_open_dir(path, &dirstream, 1);
|
|
if (fd < 0)
|
|
return 1;
|
|
|
|
res = ioctl(fd, BTRFS_IOC_SYNC);
|
|
close_file_or_dir(fd, dirstream);
|
|
if( res < 0 ){
|
|
error("sync ioctl failed on '%s': %m", path);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int parse_compress_type(char *s)
|
|
{
|
|
if (strcmp(optarg, "zlib") == 0)
|
|
return BTRFS_COMPRESS_ZLIB;
|
|
else if (strcmp(optarg, "lzo") == 0)
|
|
return BTRFS_COMPRESS_LZO;
|
|
else if (strcmp(optarg, "zstd") == 0)
|
|
return BTRFS_COMPRESS_ZSTD;
|
|
else {
|
|
error("unknown compression type %s", s);
|
|
exit(1);
|
|
};
|
|
}
|
|
|
|
static const char * const cmd_filesystem_defrag_usage[] = {
|
|
"btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
|
|
"Defragment a file or a directory",
|
|
"",
|
|
"-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 struct btrfs_ioctl_defrag_range_args defrag_global_range;
|
|
static int defrag_global_verbose;
|
|
static int defrag_global_errors;
|
|
static int defrag_callback(const char *fpath, const struct stat *sb,
|
|
int typeflag, struct FTW *ftwbuf)
|
|
{
|
|
int ret = 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);
|
|
if (fd < 0) {
|
|
goto error;
|
|
}
|
|
ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, &defrag_global_range);
|
|
close(fd);
|
|
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) {
|
|
goto error;
|
|
}
|
|
}
|
|
return 0;
|
|
|
|
error:
|
|
error("defrag failed on %s: %m", fpath);
|
|
defrag_global_errors++;
|
|
return 0;
|
|
}
|
|
|
|
static int cmd_filesystem_defrag(int argc, char **argv)
|
|
{
|
|
int fd;
|
|
int flush = 0;
|
|
u64 start = 0;
|
|
u64 len = (u64)-1;
|
|
u64 thresh;
|
|
int i;
|
|
int recursive = 0;
|
|
int ret = 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;
|
|
while(1) {
|
|
int c = getopt(argc, argv, "vrc::fs:l:t:");
|
|
if (c < 0)
|
|
break;
|
|
|
|
switch(c) {
|
|
case 'c':
|
|
compress_type = BTRFS_COMPRESS_ZLIB;
|
|
if (optarg)
|
|
compress_type = parse_compress_type(optarg);
|
|
break;
|
|
case 'f':
|
|
flush = 1;
|
|
break;
|
|
case 'v':
|
|
defrag_global_verbose = 1;
|
|
break;
|
|
case 's':
|
|
start = parse_size(optarg);
|
|
break;
|
|
case 'l':
|
|
len = parse_size(optarg);
|
|
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;
|
|
}
|
|
break;
|
|
case 'r':
|
|
recursive = 1;
|
|
break;
|
|
default:
|
|
usage(cmd_filesystem_defrag_usage);
|
|
}
|
|
}
|
|
|
|
if (check_argc_min(argc - optind, 1))
|
|
usage(cmd_filesystem_defrag_usage);
|
|
|
|
memset(&defrag_global_range, 0, sizeof(defrag_global_range));
|
|
defrag_global_range.start = start;
|
|
defrag_global_range.len = len;
|
|
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 (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) {
|
|
error("cannot open %s: %m", argv[i]);
|
|
ret = -errno;
|
|
goto next;
|
|
}
|
|
|
|
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))) {
|
|
error("%s is not a directory or a regular file",
|
|
argv[i]);
|
|
ret = -EINVAL;
|
|
goto next;
|
|
}
|
|
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 = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE,
|
|
&defrag_global_range);
|
|
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;
|
|
}
|
|
}
|
|
next:
|
|
if (ret)
|
|
defrag_global_errors++;
|
|
close_file_or_dir(fd, dirstream);
|
|
}
|
|
|
|
if (defrag_global_errors)
|
|
fprintf(stderr, "total %d failures\n", defrag_global_errors);
|
|
|
|
return !!defrag_global_errors;
|
|
}
|
|
|
|
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_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;
|
|
|
|
clean_args_no_options_relaxed(argc, argv, cmd_filesystem_resize_usage);
|
|
|
|
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) {
|
|
error("resize value too long (%s)", amount);
|
|
return 1;
|
|
}
|
|
|
|
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 ){
|
|
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_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>.",
|
|
"If <newlabel> is passed, set the filesystem label to <newlabel>.",
|
|
NULL
|
|
};
|
|
|
|
static int cmd_filesystem_label(int argc, char **argv)
|
|
{
|
|
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 - optind > 1) {
|
|
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, 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
|
|
}
|
|
};
|
|
|
|
int cmd_filesystem(int argc, char **argv)
|
|
{
|
|
return handle_command_group(&filesystem_cmd_group, argc, argv);
|
|
}
|