fs/9p: Properly update inode attributes on link

With caching enabled, we need to make sure we don't
update inode->i_size via stat2inode because we could
have dirty data which is not yet written to the server

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>

fs/9p/vfs_inode.c

@@ -1292,8 +1292,10 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
 	sprintf(name, "%d\n", oldfid->fid);
 	retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
 	__putname(name);
-	if (!retval)
+	if (!retval) {
+		v9fs_refresh_inode(oldfid, old_dentry->d_inode);
 		v9fs_invalidate_inode_attr(dir);
+	}
 clunk_fid:
 	p9_client_clunk(oldfid);
 	return retval;

fs/9p/vfs_inode_dotl.c

@@ -671,19 +671,11 @@ v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
 	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
 		/* Get the latest stat info from server. */
 		struct p9_fid *fid;
-		struct p9_stat_dotl *st;
-
 		fid = v9fs_fid_lookup(old_dentry);
 		if (IS_ERR(fid))
 			return PTR_ERR(fid);
 
-		st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
-		if (IS_ERR(st))
-			return PTR_ERR(st);
-
-		v9fs_stat2inode_dotl(st, old_dentry->d_inode);
-
-		kfree(st);
+		v9fs_refresh_inode_dotl(fid, old_dentry->d_inode);
 	}
 	ihold(old_dentry->d_inode);
 	d_instantiate(dentry, old_dentry->d_inode);