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Btrfs-progs: allow fsck to take the tree bytenr 

Sometimes we have a pretty corrupted fs but have an old tree bytenr that we
could use, add the ability to specify the tree root bytenr.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Tested-by: Ansgar Hockmann-Stolle <ansgar.hockmann-stolle@uni-osnabrueck.de>
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Josef Bacik 2014-10-31 14:01:21 -04:00 committed by David Sterba
parent 05063de62c
commit 3a98fe43f6
1 changed files with 9 additions and 2 deletions
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11
cmds-check.c
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@ -7677,6 +7677,7 @@ static struct option long_options[] = {
{ "backup", 0, NULL, 0 },
{ "subvol-extents", 1, NULL, 'E' },
{ "qgroup-report", 0, NULL, 'Q' },
{ "tree-root", 1, NULL, 'r' },
{ NULL, 0, NULL, 0}
};
@ -7692,6 +7693,7 @@ const char * const cmd_check_usage[] = {
"--check-data-csum verify checkums of data blocks",
"--qgroup-report print a report on qgroup consistency",
"--subvol-extents <subvolid> print subvolume extents and sharing state",
"--tree-root <bytenr> use the given bytenr for the tree root",
NULL
};
@ -7702,6 +7704,7 @@ int cmd_check(int argc, char **argv)
struct btrfs_fs_info *info;
u64 bytenr = 0;
u64 subvolid = 0;
u64 tree_root_bytenr = 0;
char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
int ret;
u64 num;
@ -7712,7 +7715,7 @@ int cmd_check(int argc, char **argv)
while(1) {
int c;
c = getopt_long(argc, argv, "as:b", long_options,
c = getopt_long(argc, argv, "as:br:", long_options,
&option_index);
if (c < 0)
break;
@ -7739,6 +7742,9 @@ int cmd_check(int argc, char **argv)
case 'E':
subvolid = arg_strtou64(optarg);
break;
case 'r':
tree_root_bytenr = arg_strtou64(optarg);
break;
case '?':
case 'h':
usage(cmd_check_usage);
@ -7782,7 +7788,8 @@ int cmd_check(int argc, char **argv)
if (repair)
ctree_flags |= OPEN_CTREE_PARTIAL;
info = open_ctree_fs_info(argv[optind], bytenr, 0, ctree_flags);
info = open_ctree_fs_info(argv[optind], bytenr, tree_root_bytenr,
ctree_flags);
if (!info) {
fprintf(stderr, "Couldn't open file system\n");
ret = -EIO;