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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2010-06-30 19:18:50 +0530 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@gmail.com> | 2010-08-02 14:28:35 -0500 |
| commit | a534c8d15b1f1d0f861fc2bb9e0529bd8486ec3f (patch) | |
| tree | 0451da7a61bd7e3eb5968d65beee3243f7f51b5d /fs/9p/vfs_super.c | |
| parent | ebf46264a004818fe5b23f0ac18ac7336897d807 (diff) | |
| download | lwn-a534c8d15b1f1d0f861fc2bb9e0529bd8486ec3f.tar.gz lwn-a534c8d15b1f1d0f861fc2bb9e0529bd8486ec3f.zip | |
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.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c index 0a2e2030c844..4b9ede0b41b7 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, }; |