fs/9p: Add drop_inode 9p callback

We want to immediately drop the inode in non cached mode

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>

1 files changed, 15 insertions, 0 deletions

diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index f84d625b8790..3fdaeb3c6eda 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -293,6 +293,20 @@ static int v9fs_sync_fs(struct super_block *sb, int wait)
         return p9_client_sync_fs(v9ses->root_fid);
 }
 
+static int v9fs_drop_inode(struct inode *inode)
+{
+        struct v9fs_session_info *v9ses;
+        v9ses = v9fs_inode2v9ses(inode);
+        if (v9ses->cache)
+                return generic_drop_inode(inode);
+        /*
+         * in case of non cached mode always drop the
+         * the inode because we want the inode attribute
+         * to always match that on the server.
+         */
+        return 1;
+}
+
 static const struct super_operations v9fs_super_ops = {
         .alloc_inode = v9fs_alloc_inode,
         .destroy_inode = v9fs_destroy_inode,
@@ -307,6 +321,7 @@ static const struct super_operations v9fs_super_ops_dotl = {
         .destroy_inode = v9fs_destroy_inode,
         .sync_fs = v9fs_sync_fs,
         .statfs = v9fs_statfs,
+        .drop_inode = v9fs_drop_inode,
         .evict_inode = v9fs_evict_inode,
         .show_options = generic_show_options,
         .umount_begin = v9fs_umount_begin,