mirror of
https://github.com/kdave/btrfs-progs
synced 2024-12-25 07:32:22 +00:00
c0a7cbf03c
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
523 lines
12 KiB
C
523 lines
12 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 "kerncompat.h"
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#include "ctree.h"
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#include "ioctl.h"
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#include "utils.h"
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#include "volumes.h"
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#include "version.h"
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#include "commands.h"
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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_df_usage[] = {
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"btrfs filesystem df <path>",
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"Show space usage information for a mount point",
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NULL
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};
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static int cmd_df(int argc, char **argv)
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{
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struct btrfs_ioctl_space_args *sargs, *sargs_orig;
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u64 count = 0, i;
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int ret;
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int fd;
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int e;
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char *path;
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DIR *dirstream = NULL;
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if (check_argc_exact(argc, 2))
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usage(cmd_df_usage);
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path = argv[1];
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fd = open_file_or_dir(path, &dirstream);
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if (fd < 0) {
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fprintf(stderr, "ERROR: can't access to '%s'\n", path);
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return 1;
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}
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sargs_orig = sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
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if (!sargs) {
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ret = -ENOMEM;
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goto out;
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}
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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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e = errno;
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if (ret) {
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fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
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path, strerror(e));
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goto out;
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}
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if (!sargs->total_spaces) {
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ret = 0;
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goto out;
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}
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count = sargs->total_spaces;
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sargs = realloc(sargs, 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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sargs = sargs_orig;
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ret = -ENOMEM;
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goto out;
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}
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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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e = errno;
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if (ret) {
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fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
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path, strerror(e));
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goto out;
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}
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for (i = 0; i < sargs->total_spaces; i++) {
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char description[80];
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int written = 0;
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u64 flags = sargs->spaces[i].flags;
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memset(description, 0, 80);
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if (flags & BTRFS_BLOCK_GROUP_DATA) {
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if (flags & BTRFS_BLOCK_GROUP_METADATA) {
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snprintf(description, 14, "%s",
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"Data+Metadata");
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written += 13;
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} else {
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snprintf(description, 5, "%s", "Data");
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written += 4;
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}
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} else if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
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snprintf(description, 7, "%s", "System");
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written += 6;
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} else if (flags & BTRFS_BLOCK_GROUP_METADATA) {
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snprintf(description, 9, "%s", "Metadata");
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written += 8;
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}
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if (flags & BTRFS_BLOCK_GROUP_RAID0) {
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snprintf(description+written, 8, "%s", ", RAID0");
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written += 7;
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} else if (flags & BTRFS_BLOCK_GROUP_RAID1) {
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snprintf(description+written, 8, "%s", ", RAID1");
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written += 7;
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} else if (flags & BTRFS_BLOCK_GROUP_DUP) {
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snprintf(description+written, 6, "%s", ", DUP");
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written += 5;
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} else if (flags & BTRFS_BLOCK_GROUP_RAID10) {
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snprintf(description+written, 9, "%s", ", RAID10");
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written += 8;
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} else if (flags & BTRFS_BLOCK_GROUP_RAID5) {
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snprintf(description+written, 9, "%s", ", RAID5");
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written += 7;
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} else if (flags & BTRFS_BLOCK_GROUP_RAID6) {
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snprintf(description+written, 9, "%s", ", RAID6");
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written += 7;
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}
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printf("%s: total=%s, used=%s\n", description,
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pretty_size(sargs->spaces[i].total_bytes),
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pretty_size(sargs->spaces[i].used_bytes));
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}
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out:
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close_file_or_dir(fd, dirstream);
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free(sargs);
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return !!ret;
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}
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static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
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{
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char uuidbuf[37];
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struct list_head *cur;
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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, 37);
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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(cur, &fs_devices->devices) {
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device = list_entry(cur, struct btrfs_device, 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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static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
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{
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char uuidbuf[37];
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struct list_head *cur;
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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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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(device->super_bytes_used));
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list_for_each(cur, &fs_devices->devices) {
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device = list_entry(cur, struct btrfs_device, 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(device->total_bytes),
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pretty_size(device->bytes_used), device->name);
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devs_found++;
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}
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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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static const char * const cmd_show_usage[] = {
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"btrfs filesystem show [--all-devices|<uuid>]",
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"Show the structure of a filesystem",
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"If no argument is given, structure of all present filesystems is shown.",
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NULL
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};
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static int cmd_show(int argc, char **argv)
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{
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struct list_head *all_uuids;
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struct btrfs_fs_devices *fs_devices;
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struct list_head *cur_uuid;
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char *search = NULL;
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int ret;
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int where = BTRFS_SCAN_PROC;
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int searchstart = 1;
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if( argc > 1 && !strcmp(argv[1],"--all-devices")){
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where = BTRFS_SCAN_DEV;
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searchstart += 1;
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}
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if (check_argc_max(argc, searchstart + 1))
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usage(cmd_show_usage);
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ret = scan_for_btrfs(where, 0);
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if (ret){
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fprintf(stderr, "ERROR: error %d while scanning\n", ret);
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return 1;
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}
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if(searchstart < argc)
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search = argv[searchstart];
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all_uuids = btrfs_scanned_uuids();
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list_for_each(cur_uuid, all_uuids) {
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fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices,
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list);
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if (search && uuid_search(fs_devices, search) == 0)
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continue;
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print_one_uuid(fs_devices);
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}
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printf("%s\n", BTRFS_BUILD_VERSION);
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return 0;
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}
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static const char * const cmd_sync_usage[] = {
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"btrfs filesystem sync <path>",
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"Force a sync on a filesystem",
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NULL
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};
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static int cmd_sync(int argc, char **argv)
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{
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int fd, res, e;
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char *path;
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DIR *dirstream = NULL;
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if (check_argc_exact(argc, 2))
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usage(cmd_sync_usage);
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path = argv[1];
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fd = open_file_or_dir(path, &dirstream);
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if (fd < 0) {
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fprintf(stderr, "ERROR: can't access to '%s'\n", path);
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return 1;
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}
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printf("FSSync '%s'\n", path);
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res = ioctl(fd, BTRFS_IOC_SYNC);
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e = errno;
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close_file_or_dir(fd, dirstream);
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if( res < 0 ){
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fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
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path, strerror(e));
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return 1;
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}
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return 0;
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}
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static int parse_compress_type(char *s)
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{
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if (strcmp(optarg, "zlib") == 0)
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return BTRFS_COMPRESS_ZLIB;
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else if (strcmp(optarg, "lzo") == 0)
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return BTRFS_COMPRESS_LZO;
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else {
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fprintf(stderr, "Unknown compress type %s\n", s);
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exit(1);
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};
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}
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static const char * const cmd_defrag_usage[] = {
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"btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
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"Defragment a file or a directory",
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"",
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"-v be verbose",
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"-c[zlib,lzo] compress the file while defragmenting",
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"-f flush data to disk immediately after defragmenting",
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"-s start defragment only from byte onward",
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"-l len defragment only up to len bytes",
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"-t size minimal size of file to be considered for defragmenting",
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NULL
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};
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static int cmd_defrag(int argc, char **argv)
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{
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int fd;
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int flush = 0;
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u64 start = 0;
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u64 len = (u64)-1;
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u32 thresh = 0;
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int i;
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int errors = 0;
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int ret = 0;
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int verbose = 0;
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int fancy_ioctl = 0;
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struct btrfs_ioctl_defrag_range_args range;
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int e=0;
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int compress_type = BTRFS_COMPRESS_NONE;
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DIR *dirstream = NULL;
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optind = 1;
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while(1) {
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int c = getopt(argc, argv, "vc::fs:l:t:");
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if (c < 0)
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break;
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switch(c) {
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case 'c':
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compress_type = BTRFS_COMPRESS_ZLIB;
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if (optarg)
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compress_type = parse_compress_type(optarg);
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fancy_ioctl = 1;
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break;
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case 'f':
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flush = 1;
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fancy_ioctl = 1;
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break;
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case 'v':
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verbose = 1;
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break;
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case 's':
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start = parse_size(optarg);
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fancy_ioctl = 1;
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break;
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case 'l':
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len = parse_size(optarg);
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fancy_ioctl = 1;
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break;
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case 't':
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thresh = parse_size(optarg);
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fancy_ioctl = 1;
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break;
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default:
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usage(cmd_defrag_usage);
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}
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}
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if (check_argc_min(argc - optind, 1))
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usage(cmd_defrag_usage);
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memset(&range, 0, sizeof(range));
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range.start = start;
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range.len = len;
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range.extent_thresh = thresh;
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if (compress_type) {
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range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
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range.compress_type = compress_type;
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}
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if (flush)
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range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
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for (i = optind; i < argc; i++) {
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if (verbose)
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printf("%s\n", argv[i]);
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fd = open_file_or_dir(argv[i], &dirstream);
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if (fd < 0) {
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fprintf(stderr, "failed to open %s\n", argv[i]);
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perror("open:");
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errors++;
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continue;
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}
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if (!fancy_ioctl) {
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ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
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e=errno;
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} else {
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ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, &range);
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if (ret && errno == ENOTTY) {
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fprintf(stderr, "ERROR: defrag range ioctl not "
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"supported in this kernel, please try "
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"without any options.\n");
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errors++;
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close(fd);
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break;
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}
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e = errno;
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}
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if (ret) {
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fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
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argv[i], strerror(e));
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errors++;
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}
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close_file_or_dir(fd, dirstream);
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}
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if (verbose)
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printf("%s\n", BTRFS_BUILD_VERSION);
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if (errors)
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fprintf(stderr, "total %d failures\n", errors);
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return !!errors;
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}
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static const char * const cmd_resize_usage[] = {
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"btrfs filesystem resize [devid:][+/-]<newsize>[gkm]|[devid:]max <path>",
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"Resize a filesystem",
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"If 'max' is passed, the filesystem will occupy all available space",
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"on the device 'devid'.",
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NULL
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};
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static int cmd_resize(int argc, char **argv)
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{
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struct btrfs_ioctl_vol_args args;
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int fd, res, len, e;
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char *amount, *path;
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DIR *dirstream = NULL;
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if (check_argc_exact(argc, 3))
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usage(cmd_resize_usage);
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amount = argv[1];
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path = argv[2];
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len = strlen(amount);
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if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
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fprintf(stderr, "ERROR: size value too long ('%s)\n",
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amount);
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return 1;
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}
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fd = open_file_or_dir(path, &dirstream);
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if (fd < 0) {
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fprintf(stderr, "ERROR: can't access to '%s'\n", path);
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return 1;
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}
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printf("Resize '%s' of '%s'\n", path, amount);
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strncpy_null(args.name, amount);
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res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
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e = errno;
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close_file_or_dir(fd, dirstream);
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if( res < 0 ){
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fprintf(stderr, "ERROR: unable to resize '%s' - %s\n",
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path, strerror(e));
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return 1;
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}
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return 0;
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}
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static const char * const cmd_label_usage[] = {
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"btrfs filesystem label [<device>|<mount_point>] [<newlabel>]",
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"Get or change the label of a filesystem",
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"With one argument, get the label of filesystem on <device>.",
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"If <newlabel> is passed, set the filesystem label to <newlabel>.",
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NULL
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};
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static int cmd_label(int argc, char **argv)
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{
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if (check_argc_min(argc, 2) || check_argc_max(argc, 3))
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usage(cmd_label_usage);
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if (argc > 2)
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return set_label(argv[1], argv[2]);
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else
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return get_label(argv[1]);
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}
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const struct cmd_group filesystem_cmd_group = {
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filesystem_cmd_group_usage, NULL, {
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{ "df", cmd_df, cmd_df_usage, NULL, 0 },
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{ "show", cmd_show, cmd_show_usage, NULL, 0 },
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{ "sync", cmd_sync, cmd_sync_usage, NULL, 0 },
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{ "defragment", cmd_defrag, cmd_defrag_usage, NULL, 0 },
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{ "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
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{ "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
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{ "label", cmd_label, cmd_label_usage, NULL, 0 },
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NULL_CMD_STRUCT
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}
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};
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int cmd_filesystem(int argc, char **argv)
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{
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return handle_command_group(&filesystem_cmd_group, argc, argv);
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}
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