Introduce path_put()

[pandora-kernel.git] / fs / namei.c

diff --git a/fs/namei.c b/fs/namei.c
index c9b05a7..b0df7ea 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -362,11 +362,18 @@ int deny_write_access(struct file * file)
        return 0;
 }
 
-void path_release(struct nameidata *nd)
+/**
+ * path_put - put a reference to a path
+ * @path: path to put the reference to
+ *
+ * Given a path decrement the reference count to the dentry and the vfsmount.
+ */
+void path_put(struct path *path)
 {
-       dput(nd->path.dentry);
-       mntput(nd->path.mnt);
+       dput(path->dentry);
+       mntput(path->mnt);
 }
+EXPORT_SYMBOL(path_put);
 
 /**
  * release_open_intent - free up open intent resources
@@ -551,7 +558,7 @@ static __always_inline int __vfs_follow_link(struct nameidata *nd, const char *l
                goto fail;
 
        if (*link == '/') {
-               path_release(nd);
+               path_put(&nd->path);
                if (!walk_init_root(link, nd))
                        /* weird __emul_prefix() stuff did it */
                        goto out;
@@ -567,18 +574,18 @@ out:
         */
        name = __getname();
        if (unlikely(!name)) {
-               path_release(nd);
+               path_put(&nd->path);
                return -ENOMEM;
        }
        strcpy(name, nd->last.name);
        nd->last.name = name;
        return 0;
 fail:
-       path_release(nd);
+       path_put(&nd->path);
        return PTR_ERR(link);
 }
 
-static inline void dput_path(struct path *path, struct nameidata *nd)
+static void path_put_conditional(struct path *path, struct nameidata *nd)
 {
        dput(path->dentry);
        if (path->mnt != nd->path.mnt)
@@ -651,8 +658,8 @@ static inline int do_follow_link(struct path *path, struct nameidata *nd)
        nd->depth--;
        return err;
 loop:
-       dput_path(path, nd);
-       path_release(nd);
+       path_put_conditional(path, nd);
+       path_put(&nd->path);
        return err;
 }
 
@@ -993,10 +1000,10 @@ return_reval:
 return_base:
                return 0;
 out_dput:
-               dput_path(&next, nd);
+               path_put_conditional(&next, nd);
                break;
        }
-       path_release(nd);
+       path_put(&nd->path);
 return_err:
        return err;
 }
@@ -1070,7 +1077,7 @@ static int __emul_lookup_dentry(const char *name, struct nameidata *nd)
                                mntput(old_mnt);
                                return 1;
                        }
-                       path_release(nd);
+                       path_put(&nd->path);
                }
                nd->path.dentry = old_dentry;
                nd->path.mnt = old_mnt;
@@ -1230,7 +1237,7 @@ static int __path_lookup_intent_open(int dfd, const char *name,
        if (IS_ERR(nd->intent.open.file)) {
                if (err == 0) {
                        err = PTR_ERR(nd->intent.open.file);
-                       path_release(nd);
+                       path_put(&nd->path);
                }
        } else if (err != 0)
                release_open_intent(nd);
@@ -1806,11 +1813,11 @@ ok:
        return 0;
 
 exit_dput:
-       dput_path(&path, nd);
+       path_put_conditional(&path, nd);
 exit:
        if (!IS_ERR(nd->intent.open.file))
                release_open_intent(nd);
-       path_release(nd);
+       path_put(&nd->path);
        return error;
 
 do_link:
@@ -1979,7 +1986,7 @@ asmlinkage long sys_mknodat(int dfd, const char __user *filename, int mode,
                dput(dentry);
        }
        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
-       path_release(&nd);
+       path_put(&nd.path);
 out:
        putname(tmp);
 
@@ -2039,7 +2046,7 @@ asmlinkage long sys_mkdirat(int dfd, const char __user *pathname, int mode)
        dput(dentry);
 out_unlock:
        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
-       path_release(&nd);
+       path_put(&nd.path);
 out:
        putname(tmp);
 out_err:
@@ -2147,7 +2154,7 @@ static long do_rmdir(int dfd, const char __user *pathname)
 exit2:
        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
 exit1:
-       path_release(&nd);
+       path_put(&nd.path);
 exit:
        putname(name);
        return error;
@@ -2231,7 +2238,7 @@ static long do_unlinkat(int dfd, const char __user *pathname)
        if (inode)
                iput(inode);    /* truncate the inode here */
 exit1:
-       path_release(&nd);
+       path_put(&nd.path);
 exit:
        putname(name);
        return error;
@@ -2308,7 +2315,7 @@ asmlinkage long sys_symlinkat(const char __user *oldname,
        dput(dentry);
 out_unlock:
        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
-       path_release(&nd);
+       path_put(&nd.path);
 out:
        putname(to);
 out_putname:
@@ -2404,9 +2411,9 @@ asmlinkage long sys_linkat(int olddfd, const char __user *oldname,
 out_unlock:
        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
 out_release:
-       path_release(&nd);
+       path_put(&nd.path);
 out:
-       path_release(&old_nd);
+       path_put(&old_nd.path);
 exit:
        putname(to);
 
@@ -2634,9 +2641,9 @@ exit4:
 exit3:
        unlock_rename(new_dir, old_dir);
 exit2:
-       path_release(&newnd);
+       path_put(&newnd.path);
 exit1:
-       path_release(&oldnd);
+       path_put(&oldnd.path);
 exit:
        return error;
 }
@@ -2810,7 +2817,6 @@ EXPORT_SYMBOL(page_symlink);
 EXPORT_SYMBOL(page_symlink_inode_operations);
 EXPORT_SYMBOL(path_lookup);
 EXPORT_SYMBOL(vfs_path_lookup);
-EXPORT_SYMBOL(path_release);
 EXPORT_SYMBOL(permission);
 EXPORT_SYMBOL(vfs_permission);
 EXPORT_SYMBOL(file_permission);