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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2010-06-30 19:18:50 +0530
committerEric Van Hensbergen <ericvh@gmail.com>2010-08-02 14:28:35 -0500
commita534c8d15b1f1d0f861fc2bb9e0529bd8486ec3f (patch)
tree0451da7a61bd7e3eb5968d65beee3243f7f51b5d /fs/9p/vfs_super.c
parentebf46264a004818fe5b23f0ac18ac7336897d807 (diff)
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fs/9p: Prevent parallel rename when doing fid_lookup
During fid lookup we need to make sure that the dentry->d_parent doesn't change so that we can safely walk the parent dentries. To ensure that we need to prevent cross directory rename during fid_lookup. Add a per superblock rename_sem rw_semaphore to prevent parallel fid lookup and rename. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'fs/9p/vfs_super.c')
-rw-r--r--fs/9p/vfs_super.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 0a2e2030c84..4b9ede0b41b 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -287,4 +287,5 @@ struct file_system_type v9fs_fs_type = {
.get_sb = v9fs_get_sb,
.kill_sb = v9fs_kill_super,
.owner = THIS_MODULE,
+ .fs_flags = FS_RENAME_DOES_D_MOVE,
};