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| author | Filipe David Borba Manana <fdmanana@gmail.com> | 2014-05-23 14:44:29 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.cz> | 2014-08-22 14:39:31 +0200 |
| commit | 602aac5dbf0c3686c7473dfb025ca56ed13e2414 (patch) | |
| tree | 057af18c1a04683e345c0aa765a3a61accc1d6cc | |
| parent | fd518cfcb1fdb49ec4e5f09c397d16abb36178b8 (diff) | |
Btrfs-progs: debug-tree, add option to dump a single tree
Very often while debugging filesystems with many subvolumes and/or
snapshots, specially when they are large, I want to see only the
content of one of the trees. So this change just adds an option
to btrfs-debug-tree to allow to specify the id of the tree we're
interesting in dumping to stdout.
Example: btrfs-debug-tree -t 257 /dev/sdc
Will only dump the tree of the first snapshot or subvolume that was
created.
Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
| -rw-r--r-- | btrfs-debug-tree.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/btrfs-debug-tree.c b/btrfs-debug-tree.c index cb6c1061..36e1115c 100644 --- a/btrfs-debug-tree.c +++ b/btrfs-debug-tree.c @@ -41,6 +41,8 @@ static int print_usage(void) fprintf(stderr, "\t-u : print info of uuid tree only\n"); fprintf(stderr, "\t-b block_num : print info of the specified block" " only\n"); + fprintf(stderr, + "\t-t tree_id : print only the tree with the given id\n"); fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION); exit(1); } @@ -136,12 +138,13 @@ int main(int ac, char **av) int root_backups = 0; u64 block_only = 0; struct btrfs_root *tree_root_scan; + u64 tree_id = 0; radix_tree_init(); while(1) { int c; - c = getopt(ac, av, "deb:rRu"); + c = getopt(ac, av, "deb:rRut:"); if (c < 0) break; switch(c) { @@ -164,6 +167,9 @@ int main(int ac, char **av) case 'b': block_only = arg_strtou64(optarg); break; + case 't': + tree_id = arg_strtou64(optarg); + break; default: print_usage(); } @@ -208,7 +214,7 @@ int main(int ac, char **av) goto close_root; } - if (!(extent_only || uuid_tree_only)) { + if (!(extent_only || uuid_tree_only || tree_id)) { if (roots_only) { printf("root tree: %llu level %d\n", (unsigned long long)info->tree_root->node->start, @@ -268,6 +274,8 @@ again: 0); if (!extent_buffer_uptodate(buf)) goto next; + if (tree_id && found_key.objectid != tree_id) + goto next; switch(found_key.objectid) { case BTRFS_ROOT_TREE_OBJECTID: |