Btrfs: Invalidate dcache entry after creating snapshot and
We need to invalidate an existing dcache entry after creating a new
snapshot or subvolume, because a negative dache entry will stop us from
accessing the new snapshot or subvolume.
---
ctree.h | 23 +++++++++++++++++++++++
inode.c | 4 ++++
transaction.c | 4 ++++
3 files changed, 31 insertions(+)
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 1cb084e..f04684f 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -560,6 +560,7 @@
struct btrfs_root *root = pending->root;
struct extent_buffer *tmp;
int ret;
+ int namelen;
u64 objectid;
new_root_item = kmalloc(sizeof(*new_root_item), GFP_NOFS);
@@ -595,8 +596,9 @@
* insert the directory item
*/
key.offset = (u64)-1;
+ namelen = strlen(pending->name);
ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
- pending->name, strlen(pending->name),
+ pending->name, namelen,
root->fs_info->sb->s_root->d_inode->i_ino,
&key, BTRFS_FT_DIR);
@@ -606,6 +608,10 @@
ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
pending->name, strlen(pending->name), objectid,
root->fs_info->sb->s_root->d_inode->i_ino);
+
+ /* Invalidate existing dcache entry for new snapshot. */
+ btrfs_invalidate_dcache_root(root, pending->name, namelen);
+
fail:
kfree(new_root_item);
return ret;