Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / ocfs2 / symlink.c

diff --git a/kernel/fs/ocfs2/symlink.c b/kernel/fs/ocfs2/symlink.c
new file mode 100644 (file)
index 0000000..66edce7
--- /dev/null
+++ b/kernel/fs/ocfs2/symlink.c
@@ -0,0 +1,100 @@
+/* -*- 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 int ocfs2_fast_symlink_readpage(struct file *unused, struct page *page)
+{
+       struct inode *inode = page->mapping->host;
+       struct buffer_head *bh = NULL;
+       int status = ocfs2_read_inode_block(inode, &bh);
+       struct ocfs2_dinode *fe;
+       const char *link;
+       void *kaddr;
+       size_t len;
+
+       if (status < 0) {
+               mlog_errno(status);
+               return status;
+       }
+
+       fe = (struct ocfs2_dinode *) bh->b_data;
+       link = (char *) fe->id2.i_symlink;
+       /* will be less than a page size */
+       len = strnlen(link, ocfs2_fast_symlink_chars(inode->i_sb));
+       kaddr = kmap_atomic(page);
+       memcpy(kaddr, link, len + 1);
+       kunmap_atomic(kaddr);
+       SetPageUptodate(page);
+       unlock_page(page);
+       brelse(bh);
+       return 0;
+}
+
+const struct address_space_operations ocfs2_fast_symlink_aops = {
+       .readpage               = ocfs2_fast_symlink_readpage,
+};
+
+const struct inode_operations ocfs2_symlink_inode_operations = {
+       .readlink       = generic_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,
+};