summaryrefslogtreecommitdiffstats
path: root/fs/nilfs2/btnode.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/nilfs2/btnode.c')
-rw-r--r--fs/nilfs2/btnode.c76
1 files changed, 34 insertions, 42 deletions
diff --git a/fs/nilfs2/btnode.c b/fs/nilfs2/btnode.c
index 84c25382f8e3..471e269536ae 100644
--- a/fs/nilfs2/btnode.c
+++ b/fs/nilfs2/btnode.c
@@ -68,9 +68,34 @@ void nilfs_btnode_cache_clear(struct address_space *btnc)
truncate_inode_pages(btnc, 0);
}
+struct buffer_head *
+nilfs_btnode_create_block(struct address_space *btnc, __u64 blocknr)
+{
+ struct inode *inode = NILFS_BTNC_I(btnc);
+ struct buffer_head *bh;
+
+ bh = nilfs_grab_buffer(inode, btnc, blocknr, 1 << BH_NILFS_Node);
+ if (unlikely(!bh))
+ return NULL;
+
+ if (unlikely(buffer_mapped(bh) || buffer_uptodate(bh) ||
+ buffer_dirty(bh))) {
+ brelse(bh);
+ BUG();
+ }
+ memset(bh->b_data, 0, 1 << inode->i_blkbits);
+ bh->b_bdev = NILFS_I_NILFS(inode)->ns_bdev;
+ bh->b_blocknr = blocknr;
+ set_buffer_mapped(bh);
+ set_buffer_uptodate(bh);
+
+ unlock_page(bh->b_page);
+ page_cache_release(bh->b_page);
+ return bh;
+}
+
int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr,
- sector_t pblocknr, struct buffer_head **pbh,
- int newblk)
+ sector_t pblocknr, struct buffer_head **pbh)
{
struct buffer_head *bh;
struct inode *inode = NILFS_BTNC_I(btnc);
@@ -81,19 +106,6 @@ int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr,
return -ENOMEM;
err = -EEXIST; /* internal code */
- if (newblk) {
- if (unlikely(buffer_mapped(bh) || buffer_uptodate(bh) ||
- buffer_dirty(bh))) {
- brelse(bh);
- BUG();
- }
- memset(bh->b_data, 0, 1 << inode->i_blkbits);
- bh->b_bdev = NILFS_I_NILFS(inode)->ns_bdev;
- bh->b_blocknr = blocknr;
- set_buffer_mapped(bh);
- set_buffer_uptodate(bh);
- goto found;
- }
if (buffer_uptodate(bh) || buffer_dirty(bh))
goto found;
@@ -135,27 +147,6 @@ out_locked:
return err;
}
-int nilfs_btnode_get(struct address_space *btnc, __u64 blocknr,
- sector_t pblocknr, struct buffer_head **pbh, int newblk)
-{
- struct buffer_head *bh;
- int err;
-
- err = nilfs_btnode_submit_block(btnc, blocknr, pblocknr, pbh, newblk);
- if (err == -EEXIST) /* internal code (cache hit) */
- return 0;
- if (unlikely(err))
- return err;
-
- bh = *pbh;
- wait_on_buffer(bh);
- if (!buffer_uptodate(bh)) {
- brelse(bh);
- return -EIO;
- }
- return 0;
-}
-
/**
* nilfs_btnode_delete - delete B-tree node buffer
* @bh: buffer to be deleted
@@ -244,12 +235,13 @@ retry:
unlock_page(obh->b_page);
}
- err = nilfs_btnode_get(btnc, newkey, 0, &nbh, 1);
- if (likely(!err)) {
- BUG_ON(nbh == obh);
- ctxt->newbh = nbh;
- }
- return err;
+ nbh = nilfs_btnode_create_block(btnc, newkey);
+ if (!nbh)
+ return -ENOMEM;
+
+ BUG_ON(nbh == obh);
+ ctxt->newbh = nbh;
+ return 0;
failed_unlock:
unlock_page(obh->b_page);