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Btrfs: Avoid orphan inodes cleanup during committing transaction

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btrfs_lookup_dentry may trigger orphan cleanup, so it's not good
to call it while committing a transaction.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Yan, Zheng 2009-11-12 09:37:02 +00:00 committed by Chris Mason
parent c71bf099ab
commit 2e4bfab970
2 changed files with 17 additions and 16 deletions
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29
fs/btrfs/ioctl.c
View File

@ -237,7 +237,6 @@ static noinline int create_subvol(struct btrfs_root *root,
u64 objectid;
u64 new_dirid = BTRFS_FIRST_FREE_OBJECTID;
u64 index = 0;
unsigned long nr = 1;
/*
* 1 - inode item
@ -342,24 +341,21 @@ static noinline int create_subvol(struct btrfs_root *root,
d_instantiate(dentry, btrfs_lookup_dentry(dir, dentry));
fail:
nr = trans->blocks_used;
err = btrfs_commit_transaction(trans, root);
if (err && !ret)
ret = err;
btrfs_unreserve_metadata_space(root, 6);
btrfs_btree_balance_dirty(root, nr);
return ret;
}
static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
char *name, int namelen)
{
struct inode *inode;
struct btrfs_pending_snapshot *pending_snapshot;
struct btrfs_trans_handle *trans;
int ret = 0;
int err;
unsigned long nr = 0;
int ret;
if (!root->ref_cows)
return -EINVAL;
@ -372,20 +368,20 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
*/
ret = btrfs_reserve_metadata_space(root, 6);
if (ret)
goto fail_unlock;
goto fail;
pending_snapshot = kzalloc(sizeof(*pending_snapshot), GFP_NOFS);
if (!pending_snapshot) {
ret = -ENOMEM;
btrfs_unreserve_metadata_space(root, 6);
goto fail_unlock;
goto fail;
}
pending_snapshot->name = kmalloc(namelen + 1, GFP_NOFS);
if (!pending_snapshot->name) {
ret = -ENOMEM;
kfree(pending_snapshot);
btrfs_unreserve_metadata_space(root, 6);
goto fail_unlock;
goto fail;
}
memcpy(pending_snapshot->name, name, namelen);
pending_snapshot->name[namelen] = '\0';
@ -395,10 +391,19 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
pending_snapshot->root = root;
list_add(&pending_snapshot->list,
&trans->transaction->pending_snapshots);
err = btrfs_commit_transaction(trans, root);
ret = btrfs_commit_transaction(trans, root);
BUG_ON(ret);
btrfs_unreserve_metadata_space(root, 6);
fail_unlock:
btrfs_btree_balance_dirty(root, nr);
inode = btrfs_lookup_dentry(dentry->d_parent->d_inode, dentry);
if (IS_ERR(inode)) {
ret = PTR_ERR(inode);
goto fail;
}
BUG_ON(!inode);
d_instantiate(dentry, inode);
ret = 0;
fail:
return ret;
}

4
fs/btrfs/transaction.c
View File

@ -796,7 +796,6 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
memcpy(&pending->root_key, &key, sizeof(key));
fail:
kfree(new_root_item);
btrfs_unreserve_metadata_space(root, 6);
return ret;
}
@ -808,7 +807,6 @@ static noinline int finish_pending_snapshot(struct btrfs_fs_info *fs_info,
u64 index = 0;
struct btrfs_trans_handle *trans;
struct inode *parent_inode;
struct inode *inode;
struct btrfs_root *parent_root;
parent_inode = pending->dentry->d_parent->d_inode;
@ -840,8 +838,6 @@ static noinline int finish_pending_snapshot(struct btrfs_fs_info *fs_info,
BUG_ON(ret);
inode = btrfs_lookup_dentry(parent_inode, pending->dentry);
d_instantiate(pending->dentry, inode);
fail:
btrfs_end_transaction(trans, fs_info->fs_root);
return ret;