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VFS: Cachefiles should perform fs modifications on the top layer only

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Cachefiles should perform fs modifications (eg. vfs_unlink()) on the top layer
only and should not attempt to alter the lower layer.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
David Howells
2015-03-06 14:08:58 +00:00
committed by Al Viro
parent ee8ac4d61c
commit 5153bc817c
2 changed files with 28 additions and 28 deletions
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4
fs/cachefiles/interface.c
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@@ -446,7 +446,7 @@ static int cachefiles_attr_changed(struct fscache_object *_object)
return 0;
cachefiles_begin_secure(cache, &saved_cred);
mutex_lock(&object->backer->d_inode->i_mutex);
mutex_lock(&d_inode(object->backer)->i_mutex);
/* if there's an extension to a partial page at the end of the backing
* file, we need to discard the partial page so that we pick up new
@@ -465,7 +465,7 @@ static int cachefiles_attr_changed(struct fscache_object *_object)
ret = notify_change(object->backer, &newattrs, NULL);
truncate_failed:
mutex_unlock(&object->backer->d_inode->i_mutex);
mutex_unlock(&d_inode(object->backer)->i_mutex);
cachefiles_end_secure(cache, saved_cred);
if (ret == -EIO) {