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| author | Al Viro <viro@ZenIV.linux.org.uk> | 2011-12-23 07:58:13 -0500 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2011-12-23 08:02:26 -0500 |
| commit | 08c422c27f855d27b0b3d9fa30ebd938d4ae6f1f (patch) | |
| tree | f618c94aa612781c911e18440df7eb16aed8697b /fs/btrfs | |
| parent | 8d532b2afb2eacc84588db709ec280a3d1219be3 (diff) | |
| download | lwn-08c422c27f855d27b0b3d9fa30ebd938d4ae6f1f.tar.gz lwn-08c422c27f855d27b0b3d9fa30ebd938d4ae6f1f.zip | |
Btrfs: call d_instantiate after all ops are setup
This closes races where btrfs is calling d_instantiate too soon during
inode creation. All of the callers of btrfs_add_nondir are updated to
instantiate after the inode is fully setup in memory.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/inode.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 740e67bbe249..13b0542015ff 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -4590,10 +4590,6 @@ static int btrfs_add_nondir(struct btrfs_trans_handle *trans, int err = btrfs_add_link(trans, dir, inode, dentry->d_name.name, dentry->d_name.len, backref, index); - if (!err) { - d_instantiate(dentry, inode); - return 0; - } if (err > 0) err = -EEXIST; return err; @@ -4655,6 +4651,7 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry, else { init_special_inode(inode, inode->i_mode, rdev); btrfs_update_inode(trans, root, inode); + d_instantiate(dentry, inode); } out_unlock: nr = trans->blocks_used; @@ -4722,6 +4719,7 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry, inode->i_mapping->a_ops = &btrfs_aops; inode->i_mapping->backing_dev_info = &root->fs_info->bdi; BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops; + d_instantiate(dentry, inode); } out_unlock: nr = trans->blocks_used; @@ -4779,6 +4777,7 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *parent = dentry->d_parent; err = btrfs_update_inode(trans, root, inode); BUG_ON(err); + d_instantiate(dentry, inode); btrfs_log_new_name(trans, inode, NULL, parent); } @@ -7245,6 +7244,8 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry, drop_inode = 1; out_unlock: + if (!err) + d_instantiate(dentry, inode); nr = trans->blocks_used; btrfs_end_transaction_throttle(trans, root); if (drop_inode) { |