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Code Issues Releases Wiki Activity

ocfs2: Use nd_set_link(). 

ocfs2 was hand-calling vfs_follow_link(), but there's no point to that.
Let's use page_follow_link_light() and nd_set_link().

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Joel Becker 2009-04-06 16:43:42 -07:00 committed by Al Viro
parent 265e771e81
commit a731d12d6d
1 changed files with 37 additions and 40 deletions
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77
fs/ocfs2/symlink.c
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@ -39,6 +39,7 @@
#include <linux/slab.h>
#include <linux/pagemap.h>
#include <linux/utsname.h>
#include <linux/namei.h>
#define MLOG_MASK_PREFIX ML_NAMEI
#include <cluster/masklog.h>
@ -54,26 +55,6 @@
#include "buffer_head_io.h"
static char *ocfs2_page_getlink(struct dentry * dentry,
struct page **ppage);
static char *ocfs2_fast_symlink_getlink(struct inode *inode,
struct buffer_head **bh);
/* get the link contents into pagecache */
static char *ocfs2_page_getlink(struct dentry * dentry,
struct page **ppage)
{
struct page * page;
struct address_space *mapping = dentry->d_inode->i_mapping;
page = read_mapping_page(mapping, 0, NULL);
if (IS_ERR(page))
goto sync_fail;
*ppage = page;
return kmap(page);
sync_fail:
return (char*)page;
}
static char *ocfs2_fast_symlink_getlink(struct inode *inode,
struct buffer_head **bh)
@ -128,40 +109,55 @@ out:
return ret;
}
static void *ocfs2_follow_link(struct dentry *dentry,
struct nameidata *nd)
static void *ocfs2_fast_follow_link(struct dentry *dentry,
struct nameidata *nd)
{
int status;
char *link;
int status = 0;
int len;
char *target, *link = ERR_PTR(-ENOMEM);
struct inode *inode = dentry->d_inode;
struct page *page = NULL;
struct buffer_head *bh = NULL;
if (ocfs2_inode_is_fast_symlink(inode))
link = ocfs2_fast_symlink_getlink(inode, &bh);
else
link = ocfs2_page_getlink(dentry, &page);
if (IS_ERR(link)) {
status = PTR_ERR(link);
mlog_entry_void();
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;
}
status = vfs_follow_link(nd, link);
/* Fast symlinks can't be large */
len = strlen(target);
link = kzalloc(len + 1, GFP_NOFS);
if (!link) {
status = -ENOMEM;
mlog_errno(status);
goto bail;
}
memcpy(link, target, len);
nd_set_link(nd, link);
bail:
if (page) {
kunmap(page);
page_cache_release(page);
}
brelse(bh);
return ERR_PTR(status);
mlog_exit(status);
return status ? ERR_PTR(status) : link;
}
static void ocfs2_fast_put_link(struct dentry *dentry, struct nameidata *nd, void *cookie)
{
char *link = cookie;
kfree(link);
}
const struct inode_operations ocfs2_symlink_inode_operations = {
.readlink = page_readlink,
.follow_link = ocfs2_follow_link,
.follow_link = page_follow_link_light,
.put_link = page_put_link,
.getattr = ocfs2_getattr,
.setattr = ocfs2_setattr,
.setxattr = generic_setxattr,
@ -171,7 +167,8 @@ const struct inode_operations ocfs2_symlink_inode_operations = {
};
const struct inode_operations ocfs2_fast_symlink_inode_operations = {
.readlink = ocfs2_readlink,
.follow_link = ocfs2_follow_link,
.follow_link = ocfs2_fast_follow_link,
.put_link = ocfs2_fast_put_link,
.getattr = ocfs2_getattr,
.setattr = ocfs2_setattr,
.setxattr = generic_setxattr,