author: Christoph Hellwig <hch@lst.de> 2020-07-22 11:25:21 +0200
committer: Christoph Hellwig <hch@lst.de> 2020-07-31 08:17:52 +0200
commit: db63f1e315384590b979f8f74abd1b5363b69894
parent: 20cce026c3e0972017b9cb4a7cccfb8cacf187d5
Commit Summary:
Diffstat:
1 file changed, 15 insertions, 0 deletions
diff --git a/fs/init.c b/fs/init.c
index eabd9ed2b510..64d4e12eba93 100644
--- a/fs/init.c
+++ b/fs/init.c
@@ -7,6 +7,7 @@
#include <linux/mount.h>
#include <linux/namei.h>
#include <linux/fs.h>
+#include <linux/fs_struct.h>
#include <linux/init_syscalls.h>
#include "internal.h"
@@ -38,6 +39,21 @@ int __init init_umount(const char *name, int flags)
return path_umount(&path, flags);
}
+int __init init_chdir(const char *filename)
+{
+ struct path path;
+ int error;
+
+ error = kern_path(filename, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &path);
+ if (error)
+ return error;
+ error = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_CHDIR);
+ if (!error)
+ set_fs_pwd(current->fs, &path);
+ path_put(&path);
+ return error;
+}
+
int __init init_unlink(const char *pathname)
{
return do_unlinkat(AT_FDCWD, getname_kernel(pathname));