landing smfs.

[fs/lustre-release.git] / lustre / smfs / symlink.c

diff --git a/lustre/smfs/symlink.c b/lustre/smfs/symlink.c
index e1ca762..42b6ab6 100644 (file)
--- a/lustre/smfs/symlink.c
+++ b/lustre/smfs/symlink.c
@@ -1,74 +1,86 @@
-/*
- *  smfs/symlink.c
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
  *
+ *  Copyright (C) 2004 Cluster File Systems, Inc.
+ *
+ *   This file is part of Lustre, http://www.lustre.org.
+ *
+ *   Lustre is free software; you can redistribute it and/or
+ *   modify it under the terms of version 2 of the GNU General Public
+ *   License as published by the Free Software Foundation.
+ *
+ *   Lustre is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Lustre; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  *
  */
-#define DEBUG_SUBSYSTEM S_SNAP
+
+#define DEBUG_SUBSYSTEM S_SM
 
 #include <linux/kmod.h>
 #include <linux/init.h>
 #include <linux/fs.h>
 #include <linux/slab.h>
 #include <linux/string.h>
+#include <linux/obd_class.h>
+#include <linux/obd_support.h>
+#include <linux/lustre_lib.h>
 #include <linux/lustre_idl.h>
+#include <linux/lustre_smfs.h>
 
-#include "smfs_internal.h" 
+#include "smfs_internal.h"
 
-static int smfs_readlink(struct dentry * dentry, char * buffer, int buflen)
+static int smfs_readlink(struct dentry *dentry, char *buffer, int buflen)
 {
-       struct inode *cache_inode = I2CI(dentry->d_inode);
-       struct inode *cache_dir = NULL;
-       struct dentry *cache_dentry;
-       struct dentry parent;
-       int    rc = 0;
+        struct inode *cache_inode = I2CI(dentry->d_inode);
+        struct dentry *cache_dentry;
+        int rc = 0;
+        ENTRY;
+
+        if (!cache_inode)
+                RETURN(-ENOENT);
 
-       if (!cache_inode)
-               RETURN(-ENOENT);
-       if (dentry->d_parent && dentry->d_parent->d_inode){
-               cache_dir = I2CI(dentry->d_parent->d_inode);
-               prepare_parent_dentry(&parent, cache_dir);
-       }       
-       cache_dentry = d_alloc(&parent, &dentry->d_name);
-       d_add(cache_dentry, cache_inode);
-       igrab(cache_inode);
-               
-       if (cache_inode->i_op && cache_inode->i_op->readlink)   
-               rc = cache_inode->i_op->readlink(cache_dentry, buffer, buflen);
-       
-       d_unalloc(cache_dentry);
-       return rc;
+        cache_dentry = pre_smfs_dentry(NULL, cache_inode, dentry);
+        if (!cache_dentry)
+                GOTO(exit, rc = -ENOMEM);
+        if (cache_inode->i_op && cache_inode->i_op->readlink)
+                rc = cache_inode->i_op->readlink(cache_dentry, buffer, buflen);
+        GOTO(exit, rc);
+exit:
+        post_smfs_dentry(cache_dentry);
+        return rc;
 }
 
 static int smfs_follow_link(struct dentry *dentry, struct nameidata *nd)
 {
-       struct inode *cache_inode = I2CI(dentry->d_inode);
-       struct inode *cache_dir = NULL;
-       struct dentry *cache_dentry;
-       struct dentry parent;
-       int rc = 0;
-       if (!cache_inode)
-               RETURN(-ENOENT);
+        struct inode *cache_inode = I2CI(dentry->d_inode);
+        struct dentry *cache_dentry;
+        int rc = 0;
+        ENTRY;
 
-       if (dentry->d_parent && dentry->d_parent->d_inode){
-               cache_dir = I2CI(dentry->d_parent->d_inode);
-               prepare_parent_dentry(&parent, cache_dir);
-       }       
+        if (!cache_inode)
+                RETURN(-ENOENT);
 
-       cache_dentry = d_alloc(&parent, &dentry->d_name);
+        cache_dentry = pre_smfs_dentry(NULL, cache_inode, dentry);
+        if (!cache_dentry)
+                GOTO(exit, rc = -ENOMEM);
 
-       d_add(cache_dentry, cache_inode);
-       igrab(cache_inode);
-       
-       if (cache_inode->i_op && cache_inode->i_op->follow_link)        
-               rc = cache_inode->i_op->follow_link(cache_dentry, nd);
-       
-       d_unalloc(cache_dentry);
-       return rc;
+        if (cache_inode->i_op && cache_inode->i_op->follow_link)
+                rc = cache_inode->i_op->follow_link(cache_dentry, nd);
+exit:
+        post_smfs_dentry(cache_dentry);
+        return rc;
 }
+
 struct inode_operations smfs_sym_iops = {
-       readlink:       smfs_readlink,
-       follow_link:    smfs_follow_link,
-       setxattr:       smfs_setxattr,          /* BKL held */
+        readlink:        smfs_readlink,
+        follow_link:        smfs_follow_link,
+        setxattr:       smfs_setxattr,          /* BKL held */
         getxattr:       smfs_getxattr,          /* BKL held */
         listxattr:      smfs_listxattr,         /* BKL held */
         removexattr:    smfs_removexattr,       /* BKL held */