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btrfs-progs: Refactor btrfs_read_sys_array/chunk_tree to use btrfs_fs_info 

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2017-06-13 17:19:30 +08:00 committed by David Sterba
parent de5d0cea24
commit 5b4c9ccce9
3 changed files with 15 additions and 18 deletions
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4
disk-io.c
View File

@ -1173,7 +1173,7 @@ int btrfs_setup_chunk_tree_and_device_map(struct btrfs_fs_info *fs_info,
btrfs_setup_root(fs_info->chunk_root, fs_info,
BTRFS_CHUNK_TREE_OBJECTID);
ret = btrfs_read_sys_array(fs_info->chunk_root);
ret = btrfs_read_sys_array(fs_info);
if (ret)
return ret;
@ -1207,7 +1207,7 @@ int btrfs_setup_chunk_tree_and_device_map(struct btrfs_fs_info *fs_info,
}
if (!(btrfs_super_flags(sb) & BTRFS_SUPER_FLAG_METADUMP)) {
ret = btrfs_read_chunk_tree(fs_info->chunk_root);
ret = btrfs_read_chunk_tree(fs_info);
if (ret) {
fprintf(stderr, "Couldn't read chunk tree\n");
return ret;

25
volumes.c
View File

@ -1783,11 +1783,10 @@ int btrfs_check_chunk_valid(struct btrfs_fs_info *fs_info,
*
* For sys chunk in superblock, pass -1 to indicate sys chunk.
*/
static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
struct extent_buffer *leaf,
struct btrfs_chunk *chunk, int slot)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
struct map_lookup *map;
struct cache_extent *ce;
@ -1846,7 +1845,7 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
printf("warning, device %llu is missing\n",
(unsigned long long)devid);
list_add(&map->stripes[i].dev->dev_list,
&root->fs_info->fs_devices->devices);
&fs_info->fs_devices->devices);
}
}
@ -1913,11 +1912,10 @@ out:
return ret;
}
static int read_one_dev(struct btrfs_root *root,
static int read_one_dev(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf,
struct btrfs_dev_item *dev_item)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_device *device;
u64 devid;
int ret = 0;
@ -1953,9 +1951,9 @@ static int read_one_dev(struct btrfs_root *root,
return ret;
}
int btrfs_read_sys_array(struct btrfs_root *root)
int btrfs_read_sys_array(struct btrfs_fs_info *fs_info)
{
struct btrfs_super_block *super_copy = root->fs_info->super_copy;
struct btrfs_super_block *super_copy = fs_info->super_copy;
struct extent_buffer *sb;
struct btrfs_disk_key *disk_key;
struct btrfs_chunk *chunk;
@ -1968,7 +1966,7 @@ int btrfs_read_sys_array(struct btrfs_root *root)
u32 cur_offset;
struct btrfs_key key;
sb = btrfs_find_create_tree_block(root->fs_info,
sb = btrfs_find_create_tree_block(fs_info,
BTRFS_SUPER_INFO_OFFSET,
BTRFS_SUPER_INFO_SIZE);
if (!sb)
@ -2016,7 +2014,7 @@ int btrfs_read_sys_array(struct btrfs_root *root)
if (cur_offset + len > array_size)
goto out_short_read;
ret = read_one_chunk(root, &key, sb, chunk, -1);
ret = read_one_chunk(fs_info, &key, sb, chunk, -1);
if (ret)
break;
} else {
@ -2040,17 +2038,16 @@ out_short_read:
return -EIO;
}
int btrfs_read_chunk_tree(struct btrfs_root *root)
int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info)
{
struct btrfs_path *path;
struct extent_buffer *leaf;
struct btrfs_key key;
struct btrfs_key found_key;
struct btrfs_root *root = fs_info->chunk_root;
int ret;
int slot;
root = root->fs_info->chunk_root;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
@ -2083,12 +2080,12 @@ int btrfs_read_chunk_tree(struct btrfs_root *root)
struct btrfs_dev_item *dev_item;
dev_item = btrfs_item_ptr(leaf, slot,
struct btrfs_dev_item);
ret = read_one_dev(root, leaf, dev_item);
ret = read_one_dev(fs_info, leaf, dev_item);
BUG_ON(ret);
} else if (found_key.type == BTRFS_CHUNK_ITEM_KEY) {
struct btrfs_chunk *chunk;
chunk = btrfs_item_ptr(leaf, slot, struct btrfs_chunk);
ret = read_one_chunk(root, &found_key, leaf, chunk,
ret = read_one_chunk(fs_info, &found_key, leaf, chunk,
slot);
BUG_ON(ret);
}

4
volumes.h
View File

@ -204,8 +204,8 @@ static inline int btrfs_next_bg_system(struct btrfs_fs_info *fs_info,
int btrfs_rmap_block(struct btrfs_fs_info *fs_info,
u64 chunk_start, u64 physical, u64 devid,
u64 **logical, int *naddrs, int *stripe_len);
int btrfs_read_sys_array(struct btrfs_root *root);
int btrfs_read_chunk_tree(struct btrfs_root *root);
int btrfs_read_sys_array(struct btrfs_fs_info *fs_info);
int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info);
int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
struct btrfs_root *extent_root, u64 *start,
u64 *num_bytes, u64 type);