[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/fs/ocfs2/symlink.c b/ap/os/linux/linux-3.4.x/fs/ocfs2/symlink.c
new file mode 100644
index 0000000..5d22872
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/ocfs2/symlink.c
@@ -0,0 +1,173 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * linux/cluster/ssi/cfs/symlink.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program 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, GOOD TITLE
+ * or NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Questions/Comments/Bugfixes to ssic-linux-devel@lists.sourceforge.net
+ *
+ * Copyright (C) 1992 Rick Sladkey
+ *
+ * Optimization changes Copyright (C) 1994 Florian La Roche
+ *
+ * Jun 7 1999, cache symlink lookups in the page cache. -DaveM
+ *
+ * Portions Copyright (C) 2001 Compaq Computer Corporation
+ *
+ * ocfs2 symlink handling code.
+ *
+ * Copyright (C) 2004, 2005 Oracle.
+ *
+ */
+
+#include <linux/fs.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <linux/namei.h>
+
+#include <cluster/masklog.h>
+
+#include "ocfs2.h"
+
+#include "alloc.h"
+#include "file.h"
+#include "inode.h"
+#include "journal.h"
+#include "symlink.h"
+#include "xattr.h"
+
+#include "buffer_head_io.h"
+
+
+static char *ocfs2_fast_symlink_getlink(struct inode *inode,
+ struct buffer_head **bh)
+{
+ int status;
+ char *link = NULL;
+ struct ocfs2_dinode *fe;
+
+ status = ocfs2_read_inode_block(inode, bh);
+ if (status < 0) {
+ mlog_errno(status);
+ link = ERR_PTR(status);
+ goto bail;
+ }
+
+ fe = (struct ocfs2_dinode *) (*bh)->b_data;
+ link = (char *) fe->id2.i_symlink;
+bail:
+
+ return link;
+}
+
+static int ocfs2_readlink(struct dentry *dentry,
+ char __user *buffer,
+ int buflen)
+{
+ int ret;
+ char *link;
+ struct buffer_head *bh = NULL;
+ struct inode *inode = dentry->d_inode;
+
+ link = ocfs2_fast_symlink_getlink(inode, &bh);
+ if (IS_ERR(link)) {
+ ret = PTR_ERR(link);
+ goto out;
+ }
+
+ /*
+ * Without vfsmount we can't update atime now,
+ * but we will update atime here ultimately.
+ */
+ ret = vfs_readlink(dentry, buffer, buflen, link);
+
+ brelse(bh);
+out:
+ if (ret < 0)
+ mlog_errno(ret);
+ return ret;
+}
+
+static void *ocfs2_fast_follow_link(struct dentry *dentry,
+ struct nameidata *nd)
+{
+ int status = 0;
+ int len;
+ char *target, *link = ERR_PTR(-ENOMEM);
+ struct inode *inode = dentry->d_inode;
+ struct buffer_head *bh = NULL;
+
+ BUG_ON(!ocfs2_inode_is_fast_symlink(inode));
+ target = ocfs2_fast_symlink_getlink(inode, &bh);
+ if (IS_ERR(target)) {
+ status = PTR_ERR(target);
+ mlog_errno(status);
+ goto bail;
+ }
+
+ /* Fast symlinks can't be large */
+ len = strnlen(target, ocfs2_fast_symlink_chars(inode->i_sb));
+ link = kzalloc(len + 1, GFP_NOFS);
+ if (!link) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ memcpy(link, target, len);
+
+bail:
+ nd_set_link(nd, status ? ERR_PTR(status) : link);
+ brelse(bh);
+
+ if (status)
+ mlog_errno(status);
+ return NULL;
+}
+
+static void ocfs2_fast_put_link(struct dentry *dentry, struct nameidata *nd, void *cookie)
+{
+ char *link = nd_get_link(nd);
+ if (!IS_ERR(link))
+ kfree(link);
+}
+
+const struct inode_operations ocfs2_symlink_inode_operations = {
+ .readlink = page_readlink,
+ .follow_link = page_follow_link_light,
+ .put_link = page_put_link,
+ .getattr = ocfs2_getattr,
+ .setattr = ocfs2_setattr,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = ocfs2_listxattr,
+ .removexattr = generic_removexattr,
+ .fiemap = ocfs2_fiemap,
+};
+const struct inode_operations ocfs2_fast_symlink_inode_operations = {
+ .readlink = ocfs2_readlink,
+ .follow_link = ocfs2_fast_follow_link,
+ .put_link = ocfs2_fast_put_link,
+ .getattr = ocfs2_getattr,
+ .setattr = ocfs2_setattr,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = ocfs2_listxattr,
+ .removexattr = generic_removexattr,
+ .fiemap = ocfs2_fiemap,
+};