2 * Copyright (C) 2013 SUSE. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #include "kerncompat.h"
23 #include "transaction.h"
29 static const char * const rescue_cmd_group_usage
[] = {
30 "btrfs rescue <command> [options] <path>",
34 int btrfs_recover_chunk_tree(char *path
, int verbose
, int yes
);
35 int btrfs_recover_superblocks(char *path
, int verbose
, int yes
);
37 static const char * const cmd_rescue_chunk_recover_usage
[] = {
38 "btrfs rescue chunk-recover [options] <device>",
39 "Recover the chunk tree by scanning the devices one by one.",
41 "-y Assume an answer of `yes' to all questions",
47 static int cmd_rescue_chunk_recover(int argc
, char *argv
[])
55 int c
= getopt(argc
, argv
, "yvh");
67 usage(cmd_rescue_chunk_recover_usage
);
71 if (check_argc_exact(argc
- optind
, 1))
72 usage(cmd_rescue_chunk_recover_usage
);
76 ret
= check_mounted(file
);
78 error("could not check mount status: %s", strerror(-ret
));
81 error("the device is busy");
85 ret
= btrfs_recover_chunk_tree(file
, verbose
, yes
);
87 fprintf(stdout
, "Chunk tree recovered successfully\n");
90 fprintf(stdout
, "Chunk tree recovery aborted\n");
92 fprintf(stdout
, "Chunk tree recovery failed\n");
97 static const char * const cmd_rescue_super_recover_usage
[] = {
98 "btrfs rescue super-recover [options] <device>",
99 "Recover bad superblocks from good copies",
101 "-y Assume an answer of `yes' to all questions",
108 * 0 : All superblocks are valid, no need to recover
109 * 1 : Usage or syntax error
110 * 2 : Recover all bad superblocks successfully
111 * 3 : Fail to Recover bad supeblocks
112 * 4 : Abort to recover bad superblocks
114 static int cmd_rescue_super_recover(int argc
, char **argv
)
122 int c
= getopt(argc
, argv
, "vy");
133 usage(cmd_rescue_super_recover_usage
);
136 if (check_argc_exact(argc
- optind
, 1))
137 usage(cmd_rescue_super_recover_usage
);
139 dname
= argv
[optind
];
140 ret
= check_mounted(dname
);
142 error("could not check mount status: %s", strerror(-ret
));
145 error("the device is busy");
148 ret
= btrfs_recover_superblocks(dname
, verbose
, yes
);
152 static const char * const cmd_rescue_zero_log_usage
[] = {
153 "btrfs rescue zero-log <device>",
154 "Clear the tree log. Usable if it's corrupted and prevents mount.",
159 static int cmd_rescue_zero_log(int argc
, char **argv
)
161 struct btrfs_root
*root
;
162 struct btrfs_trans_handle
*trans
;
163 struct btrfs_super_block
*sb
;
167 clean_args_no_options(argc
, argv
, cmd_rescue_zero_log_usage
);
169 if (check_argc_exact(argc
, 2))
170 usage(cmd_rescue_zero_log_usage
);
172 devname
= argv
[optind
];
173 ret
= check_mounted(devname
);
175 error("could not check mount status: %s", strerror(-ret
));
178 error("%s is currently mounted", devname
);
182 root
= open_ctree(devname
, 0, OPEN_CTREE_WRITES
| OPEN_CTREE_PARTIAL
);
184 error("could not open ctree");
188 sb
= root
->fs_info
->super_copy
;
189 printf("Clearing log on %s, previous log_root %llu, level %u\n",
191 (unsigned long long)btrfs_super_log_root(sb
),
192 (unsigned)btrfs_super_log_root_level(sb
));
193 trans
= btrfs_start_transaction(root
, 1);
194 BUG_ON(IS_ERR(trans
));
195 btrfs_set_super_log_root(sb
, 0);
196 btrfs_set_super_log_root_level(sb
, 0);
197 btrfs_commit_transaction(trans
, root
);
204 static const char rescue_cmd_group_info
[] =
205 "toolbox for specific rescue operations";
207 const struct cmd_group rescue_cmd_group
= {
208 rescue_cmd_group_usage
, rescue_cmd_group_info
, {
209 { "chunk-recover", cmd_rescue_chunk_recover
,
210 cmd_rescue_chunk_recover_usage
, NULL
, 0},
211 { "super-recover", cmd_rescue_super_recover
,
212 cmd_rescue_super_recover_usage
, NULL
, 0},
213 { "zero-log", cmd_rescue_zero_log
, cmd_rescue_zero_log_usage
, NULL
, 0},
218 int cmd_rescue(int argc
, char **argv
)
220 return handle_command_group(&rescue_cmd_group
, argc
, argv
);