From: Marco Stornelli <marco.stornelli@gmail.com>
To: Linux Kernel <linux-kernel@vger.kernel.org>
Cc: Linux Embedded <linux-embedded@vger.kernel.org>,
Linux FS Devel <linux-fsdevel@vger.kernel.org>,
Tim Bird <tim.bird@am.sony.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH 07/16 v5] pramfs: symbolic links
Date: Thu, 16 Dec 2010 19:00:44 +0100 [thread overview]
Message-ID: <4D0A53CC.4020603@gmail.com> (raw)
From: Marco Stornelli <marco.stornelli@gmail.com>
Symlink operations.
Signed-off-by: Marco Stornelli <marco.stornelli@gmail.com>
---
diff -Nurp linux-2.6.36-orig/fs/pramfs/symlink.c linux-2.6.36/fs/pramfs/symlink.c
--- linux-2.6.36-orig/fs/pramfs/symlink.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.36/fs/pramfs/symlink.c 2010-11-27 11:13:18.000000000 +0100
@@ -0,0 +1,76 @@
+/*
+ * BRIEF DESCRIPTION
+ *
+ * Symlink operations
+ *
+ * Copyright 2009-2010 Marco Stornelli <marco.stornelli@gmail.com>
+ * Copyright 2003 Sony Corporation
+ * Copyright 2003 Matsushita Electric Industrial Co., Ltd.
+ * 2003-2004 (c) MontaVista Software, Inc. , Steve Longerbeam
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/fs.h>
+#include "pram.h"
+#include "xattr.h"
+
+int pram_block_symlink(struct inode *inode, const char *symname, int len)
+{
+ struct super_block *sb = inode->i_sb;
+ u64 block;
+ char *blockp;
+ int err;
+
+ err = pram_alloc_blocks(inode, 0, 1);
+ if (err)
+ return err;
+
+ block = pram_find_data_block(inode, 0);
+ blockp = pram_get_block(sb, block);
+
+ pram_memunlock_block(sb, blockp);
+ memcpy(blockp, symname, len);
+ blockp[len] = '\0';
+ pram_memlock_block(sb, blockp);
+ return 0;
+}
+
+static int pram_readlink(struct dentry *dentry, char *buffer, int buflen)
+{
+ struct inode *inode = dentry->d_inode;
+ struct super_block *sb = inode->i_sb;
+ u64 block;
+ char *blockp;
+
+ block = pram_find_data_block(inode, 0);
+ blockp = pram_get_block(sb, block);
+ return vfs_readlink(dentry, buffer, buflen, blockp);
+}
+
+static void *pram_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+ struct inode *inode = dentry->d_inode;
+ struct super_block *sb = inode->i_sb;
+ off_t block;
+ int status;
+ char *blockp;
+
+ block = pram_find_data_block(inode, 0);
+ blockp = pram_get_block(sb, block);
+ status = vfs_follow_link(nd, blockp);
+ return ERR_PTR(status);
+}
+
+struct inode_operations pram_symlink_inode_operations = {
+ .readlink = pram_readlink,
+ .follow_link = pram_follow_link,
+ .setattr = pram_notify_change,
+#ifdef CONFIG_PRAMFS_XATTR
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = pram_listxattr,
+ .removexattr = generic_removexattr,
+#endif
+};
reply other threads:[~2010-12-16 18:00 UTC|newest]
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