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Btrfs-progs: chunk-recover: add new flag to prepare recovering for ordered data chunk

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When reading block groups we will searching it's corresponding chunk, however, at this
time, some chunks has not been built(data chunks raid0/raid10/raid56), don't bug_on here,
we will try to rebuild these chunks later.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Wang Shilong 2013-11-28 13:32:49 +08:00 committed by Chris Mason
parent 387d5f3234
commit 52ddfa74fe
3 changed files with 10 additions and 1 deletions
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1
chunk-recover.c
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@ -1197,6 +1197,7 @@ open_ctree_with_broken_chunk(struct recover_control *rc)
fprintf(stderr, "Failed to allocate memory for fs_info\n");
return ERR_PTR(-ENOMEM);
}
fs_info->is_chunk_recover = 1;
fs_info->fs_devices = rc->fs_devices;
ret = btrfs_open_devices(fs_info->fs_devices, O_RDWR);

1
ctree.h
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@ -973,6 +973,7 @@ struct btrfs_fs_info {
int system_allocs;
int readonly;
int on_restoring;
int is_chunk_recover;
int (*free_extent_hook)(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 bytenr, u64 num_bytes, u64 parent,

9
volumes.c
View File

@ -1496,8 +1496,15 @@ int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset)
int readonly = 0;
int i;
/*
* During chunk recovering, we may fail to find block group's
* corresponding chunk, we will rebuild it later
*/
ce = search_cache_extent(&map_tree->cache_tree, chunk_offset);
BUG_ON(!ce);
if (!root->fs_info->is_chunk_recover)
BUG_ON(!ce);
else
return 0;
map = container_of(ce, struct map_lookup, ce);
for (i = 0; i < map->num_stripes; i++) {