summaryrefslogtreecommitdiff
path: root/fs/nfs/symlink.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/nfs/symlink.c')
-rw-r--r--fs/nfs/symlink.c37
1 files changed, 8 insertions, 29 deletions
diff --git a/fs/nfs/symlink.c b/fs/nfs/symlink.c
index 35f106599144..18dc95b0b646 100644
--- a/fs/nfs/symlink.c
+++ b/fs/nfs/symlink.c
@@ -27,26 +27,14 @@
/* Symlink caching in the page cache is even more simplistic
* and straight-forward than readdir caching.
- *
- * At the beginning of the page we store pointer to struct page in question,
- * simplifying nfs_put_link() (if inode got invalidated we can't find the page
- * to be freed via pagecache lookup).
- * The NUL-terminated string follows immediately thereafter.
*/
-struct nfs_symlink {
- struct page *page;
- char body[0];
-};
-
static int nfs_symlink_filler(struct inode *inode, struct page *page)
{
- const unsigned int pgbase = offsetof(struct nfs_symlink, body);
- const unsigned int pglen = PAGE_SIZE - pgbase;
int error;
lock_kernel();
- error = NFS_PROTO(inode)->readlink(inode, page, pgbase, pglen);
+ error = NFS_PROTO(inode)->readlink(inode, page, 0, PAGE_SIZE);
unlock_kernel();
if (error < 0)
goto error;
@@ -60,11 +48,10 @@ error:
return -EIO;
}
-static int nfs_follow_link(struct dentry *dentry, struct nameidata *nd)
+static void *nfs_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct inode *inode = dentry->d_inode;
struct page *page;
- struct nfs_symlink *p;
void *err = ERR_PTR(nfs_revalidate_inode(NFS_SERVER(inode), inode));
if (err)
goto read_failed;
@@ -78,28 +65,20 @@ static int nfs_follow_link(struct dentry *dentry, struct nameidata *nd)
err = ERR_PTR(-EIO);
goto getlink_read_error;
}
- p = kmap(page);
- p->page = page;
- nd_set_link(nd, p->body);
- return 0;
+ nd_set_link(nd, kmap(page));
+ return page;
getlink_read_error:
page_cache_release(page);
read_failed:
nd_set_link(nd, err);
- return 0;
+ return NULL;
}
-static void nfs_put_link(struct dentry *dentry, struct nameidata *nd)
+static void nfs_put_link(struct dentry *dentry, struct nameidata *nd, void *cookie)
{
- char *s = nd_get_link(nd);
- if (!IS_ERR(s)) {
- struct nfs_symlink *p;
- struct page *page;
-
- p = container_of(s, struct nfs_symlink, body[0]);
- page = p->page;
-
+ if (cookie) {
+ struct page *page = cookie;
kunmap(page);
page_cache_release(page);
}