marko10_000
/
btrfs-progs
forked from Mirrors/btrfs-progs
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

btrfs-progs: find-root: Add support to search chunk root 

Add support to search chunk root, as we only need to search tree roots
in system chunk, which should be very easy to add, just iterate in
system chunks.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
[ renamed to btrfs_next_bg_* ]
Signed-off-by: David Sterba <dsterba@suse.com>
master
Qu Wenruo 2015-11-13 10:53:41 +08:00 committed by David Sterba
parent 0ca4cd99a5
commit 2143084229
3 changed files with 29 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
find-root.c
View File

@ -108,8 +108,8 @@ int btrfs_find_root_search(struct btrfs_root *chunk_root,
{
struct btrfs_fs_info *fs_info = chunk_root->fs_info;
struct extent_buffer *eb;
u64 metadata_offset = 0;
u64 metadata_size = 0;
u64 chunk_offset = 0;
u64 chunk_size = 0;
u64 offset = 0;
u32 leafsize = chunk_root->leafsize;
int suppress_errors = 0;
@ -118,15 +118,21 @@ int btrfs_find_root_search(struct btrfs_root *chunk_root,
suppress_errors = fs_info->suppress_check_block_errors;
fs_info->suppress_check_block_errors = 1;
while (1) {
ret = btrfs_next_metadata(&fs_info->mapping_tree,
&metadata_offset, &metadata_size);
if (filter->objectid != BTRFS_CHUNK_TREE_OBJECTID)
ret = btrfs_next_bg_metadata(&fs_info->mapping_tree,
&chunk_offset,
&chunk_size);
else
ret = btrfs_next_bg_system(&fs_info->mapping_tree,
&chunk_offset,
&chunk_size);
if (ret) {
if (ret == -ENOENT)
ret = 0;
break;
}
for (offset = metadata_offset;
offset < metadata_offset + metadata_size;
for (offset = chunk_offset;
offset < chunk_offset + chunk_size;
offset += chunk_root->leafsize) {
eb = read_tree_block(chunk_root, offset, leafsize, 0);
if (!eb || IS_ERR(eb))

6
volumes.c
View File

@ -1165,8 +1165,8 @@ int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len)
return ret;
}
int btrfs_next_metadata(struct btrfs_mapping_tree *map_tree, u64 *logical,
u64 *size)
int btrfs_next_bg(struct btrfs_mapping_tree *map_tree, u64 *logical,
u64 *size, u64 type)
{
struct cache_extent *ce;
struct map_lookup *map;
@ -1179,7 +1179,7 @@ int btrfs_next_metadata(struct btrfs_mapping_tree *map_tree, u64 *logical,
return -ENOENT;
map = container_of(ce, struct map_lookup, ce);
if (map->type & BTRFS_BLOCK_GROUP_METADATA) {
if (map->type & type) {
*logical = ce->start;
*size = ce->size;
return 0;

16
volumes.h
View File

@ -167,8 +167,20 @@ int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
u64 logical, u64 *length,
struct btrfs_multi_bio **multi_ret, int mirror_num,
u64 **raid_map_ret);
int btrfs_next_metadata(struct btrfs_mapping_tree *map_tree, u64 *logical,
u64 *size);
int btrfs_next_bg(struct btrfs_mapping_tree *map_tree, u64 *logical,
u64 *size, u64 type);
static inline int btrfs_next_bg_metadata(struct btrfs_mapping_tree *map_tree,
u64 *logical, u64 *size)
{
return btrfs_next_bg(map_tree, logical, size,
BTRFS_BLOCK_GROUP_METADATA);
}
static inline int btrfs_next_bg_system(struct btrfs_mapping_tree *map_tree,
u64 *logical, u64 *size)
{
return btrfs_next_bg(map_tree, logical, size,
BTRFS_BLOCK_GROUP_SYSTEM);
}
int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
u64 chunk_start, u64 physical, u64 devid,
u64 **logical, int *naddrs, int *stripe_len);