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Diffstat (limited to 'fs/namei.c')
-rw-r--r--fs/namei.c45
1 files changed, 23 insertions, 22 deletions
diff --git a/fs/namei.c b/fs/namei.c
index 4a27eb79811..6ec1f0fefc5 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -501,6 +501,7 @@ struct path {
static inline int __do_follow_link(struct path *path, struct nameidata *nd)
{
int error;
+ void *cookie;
struct dentry *dentry = path->dentry;
touch_atime(path->mnt, dentry);
@@ -508,13 +509,15 @@ static inline int __do_follow_link(struct path *path, struct nameidata *nd)
if (path->mnt == nd->mnt)
mntget(path->mnt);
- error = dentry->d_inode->i_op->follow_link(dentry, nd);
- if (!error) {
+ cookie = dentry->d_inode->i_op->follow_link(dentry, nd);
+ error = PTR_ERR(cookie);
+ if (!IS_ERR(cookie)) {
char *s = nd_get_link(nd);
+ error = 0;
if (s)
error = __vfs_follow_link(nd, s);
if (dentry->d_inode->i_op->put_link)
- dentry->d_inode->i_op->put_link(dentry, nd);
+ dentry->d_inode->i_op->put_link(dentry, nd, cookie);
}
dput(dentry);
mntput(path->mnt);
@@ -1801,7 +1804,6 @@ int vfs_rmdir(struct inode *dir, struct dentry *dentry)
}
up(&dentry->d_inode->i_sem);
if (!error) {
- fsnotify_rmdir(dentry, dentry->d_inode, dir);
d_delete(dentry);
}
dput(dentry);
@@ -1874,7 +1876,6 @@ int vfs_unlink(struct inode *dir, struct dentry *dentry)
/* We don't d_delete() NFS sillyrenamed files--they still exist. */
if (!error && !(dentry->d_flags & DCACHE_NFSFS_RENAMED)) {
- fsnotify_unlink(dentry, dir);
d_delete(dentry);
}
@@ -2218,7 +2219,8 @@ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
error = vfs_rename_other(old_dir,old_dentry,new_dir,new_dentry);
if (!error) {
const char *new_name = old_dentry->d_name.name;
- fsnotify_move(old_dir, new_dir, old_name, new_name, is_dir, new_dentry->d_inode);
+ fsnotify_move(old_dir, new_dir, old_name, new_name, is_dir,
+ new_dentry->d_inode, old_dentry->d_inode);
}
fsnotify_oldname_free(old_name);
@@ -2345,15 +2347,17 @@ out:
int generic_readlink(struct dentry *dentry, char __user *buffer, int buflen)
{
struct nameidata nd;
- int res;
+ void *cookie;
+
nd.depth = 0;
- res = dentry->d_inode->i_op->follow_link(dentry, &nd);
- if (!res) {
- res = vfs_readlink(dentry, buffer, buflen, nd_get_link(&nd));
+ cookie = dentry->d_inode->i_op->follow_link(dentry, &nd);
+ if (!IS_ERR(cookie)) {
+ int res = vfs_readlink(dentry, buffer, buflen, nd_get_link(&nd));
if (dentry->d_inode->i_op->put_link)
- dentry->d_inode->i_op->put_link(dentry, &nd);
+ dentry->d_inode->i_op->put_link(dentry, &nd, cookie);
+ cookie = ERR_PTR(res);
}
- return res;
+ return PTR_ERR(cookie);
}
int vfs_follow_link(struct nameidata *nd, const char *link)
@@ -2396,23 +2400,20 @@ int page_readlink(struct dentry *dentry, char __user *buffer, int buflen)
return res;
}
-int page_follow_link_light(struct dentry *dentry, struct nameidata *nd)
+void *page_follow_link_light(struct dentry *dentry, struct nameidata *nd)
{
- struct page *page;
+ struct page *page = NULL;
nd_set_link(nd, page_getlink(dentry, &page));
- return 0;
+ return page;
}
-void page_put_link(struct dentry *dentry, struct nameidata *nd)
+void page_put_link(struct dentry *dentry, struct nameidata *nd, void *cookie)
{
- if (!IS_ERR(nd_get_link(nd))) {
- struct page *page;
- page = find_get_page(dentry->d_inode->i_mapping, 0);
- if (!page)
- BUG();
+ struct page *page = cookie;
+
+ if (page) {
kunmap(page);
page_cache_release(page);
- page_cache_release(page);
}
}