fs/9p: We should not allocate a new inode when creating hardlines.

Don't do new_inode_from fid in case of hardlink creation. This ensures
that link count for hardlink files get updated properly. Earlier link count
was not updated on removing a hardlink with cache mode enabled.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index cf3dd6b..c8fe480 100644 (file)
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -680,26 +680,31 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
                goto error;
        }
 
-       /* now walk from the parent so we can get unopened fid */
-       fid = p9_client_walk(dfid, 1, &name, 1);
-       if (IS_ERR(fid)) {
-               err = PTR_ERR(fid);
-               p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
-               fid = NULL;
-               goto error;
-       }
-
-       /* instantiate inode and assign the unopened fid to the dentry */
-       inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
-       if (IS_ERR(inode)) {
-               err = PTR_ERR(inode);
-               p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
-               goto error;
+       if (!(perm & P9_DMLINK)) {
+               /* now walk from the parent so we can get unopened fid */
+               fid = p9_client_walk(dfid, 1, &name, 1);
+               if (IS_ERR(fid)) {
+                       err = PTR_ERR(fid);
+                       p9_debug(P9_DEBUG_VFS,
+                                  "p9_client_walk failed %d\n", err);
+                       fid = NULL;
+                       goto error;
+               }
+               /*
+                * instantiate inode and assign the unopened fid to the dentry
+                */
+               inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
+               if (IS_ERR(inode)) {
+                       err = PTR_ERR(inode);
+                       p9_debug(P9_DEBUG_VFS,
+                                  "inode creation failed %d\n", err);
+                       goto error;
+               }
+               err = v9fs_fid_add(dentry, fid);
+               if (err < 0)
+                       goto error;
+               d_instantiate(dentry, inode);
        }
-       err = v9fs_fid_add(dentry, fid);
-       if (err < 0)
-               goto error;
-       d_instantiate(dentry, inode);
        return ofid;
 error:
        if (ofid)