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btrfs: split alloc_log_tree()

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This is a preparation patch for the next patch. Split alloc_log_tree()
into two parts. The first one allocating the tree structure, remains in
alloc_log_tree() and the second part allocating the tree node, which is
moved into btrfs_alloc_log_tree_node().

Also export the latter part is to be used in the next patch.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Naohiro Aota 2021-02-04 19:22:17 +09:00 • committed by David Sterba
parent f7ef5287a6
commit 6ab6ebb760
2 changed files with 29 additions and 6 deletions
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33
fs/btrfs/disk-io.c
View file

@ -1254,7 +1254,6 @@ static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info) struct btrfs_fs_info *fs_info)
{ {
struct btrfs_root *root; struct btrfs_root *root;
struct extent_buffer *leaf;
root = btrfs_alloc_root(fs_info, BTRFS_TREE_LOG_OBJECTID, GFP_NOFS); root = btrfs_alloc_root(fs_info, BTRFS_TREE_LOG_OBJECTID, GFP_NOFS);
if (!root) if (!root)
@ -1264,6 +1263,14 @@ static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans,
root->root_key.type = BTRFS_ROOT_ITEM_KEY; root->root_key.type = BTRFS_ROOT_ITEM_KEY;
root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; root->root_key.offset = BTRFS_TREE_LOG_OBJECTID;
return root;
}
int btrfs_alloc_log_tree_node(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
struct extent_buffer *leaf;
/* /*
* DON'T set SHAREABLE bit for log trees. * DON'T set SHAREABLE bit for log trees.
* *
@ -1276,26 +1283,33 @@ static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans,
leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID, leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID,
NULL, 0, 0, 0, BTRFS_NESTING_NORMAL); NULL, 0, 0, 0, BTRFS_NESTING_NORMAL);
if (IS_ERR(leaf)) { if (IS_ERR(leaf))
btrfs_put_root(root); return PTR_ERR(leaf);
return ERR_CAST(leaf);
}
root->node = leaf; root->node = leaf;
btrfs_mark_buffer_dirty(root->node); btrfs_mark_buffer_dirty(root->node);
btrfs_tree_unlock(root->node); btrfs_tree_unlock(root->node);
return root;
return 0;
} }
int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info) struct btrfs_fs_info *fs_info)
{ {
struct btrfs_root *log_root; struct btrfs_root *log_root;
int ret;
log_root = alloc_log_tree(trans, fs_info); log_root = alloc_log_tree(trans, fs_info);
if (IS_ERR(log_root)) if (IS_ERR(log_root))
return PTR_ERR(log_root); return PTR_ERR(log_root);
ret = btrfs_alloc_log_tree_node(trans, log_root);
if (ret) {
btrfs_put_root(log_root);
return ret;
}
WARN_ON(fs_info->log_root_tree); WARN_ON(fs_info->log_root_tree);
fs_info->log_root_tree = log_root; fs_info->log_root_tree = log_root;
return 0; return 0;
@ -1307,11 +1321,18 @@ int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info = root->fs_info; struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_root *log_root; struct btrfs_root *log_root;
struct btrfs_inode_item *inode_item; struct btrfs_inode_item *inode_item;
int ret;
log_root = alloc_log_tree(trans, fs_info); log_root = alloc_log_tree(trans, fs_info);
if (IS_ERR(log_root)) if (IS_ERR(log_root))
return PTR_ERR(log_root); return PTR_ERR(log_root);
ret = btrfs_alloc_log_tree_node(trans, log_root);
if (ret) {
btrfs_put_root(log_root);
return ret;
}
log_root->last_trans = trans->transid; log_root->last_trans = trans->transid;
log_root->root_key.offset = root->root_key.objectid; log_root->root_key.offset = root->root_key.objectid;

2
fs/btrfs/disk-io.h
View file

@ -120,6 +120,8 @@ blk_status_t btrfs_wq_submit_bio(struct inode *inode, struct bio *bio,
extent_submit_bio_start_t *submit_bio_start); extent_submit_bio_start_t *submit_bio_start);
blk_status_t btrfs_submit_bio_done(void *private_data, struct bio *bio, blk_status_t btrfs_submit_bio_done(void *private_data, struct bio *bio,
int mirror_num); int mirror_num);
int btrfs_alloc_log_tree_node(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info); struct btrfs_fs_info *fs_info);
int btrfs_add_log_tree(struct btrfs_trans_handle *trans, int btrfs_add_log_tree(struct btrfs_trans_handle *trans,