err = init_mount("devtmpfs", "/", "devtmpfs", MS_SILENT, NULL);
if (err)
goto out;
- ksys_chdir("/.."); /* will traverse into overmounted root */
+ init_chdir("/.."); /* will traverse into overmounted root */
ksys_chroot(".");
out:
*(int *)p = err;
#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"
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));
return do_faccessat(AT_FDCWD, filename, mode, 0);
}
-int ksys_chdir(const char __user *filename)
+SYSCALL_DEFINE1(chdir, const char __user *, filename)
{
struct path path;
int error;
return error;
}
-SYSCALL_DEFINE1(chdir, const char __user *, filename)
-{
- return ksys_chdir(filename);
-}
-
SYSCALL_DEFINE1(fchdir, unsigned int, fd)
{
struct fd f = fdget_raw(fd);
int __init init_mount(const char *dev_name, const char *dir_name,
const char *type_page, unsigned long flags, void *data_page);
int __init init_umount(const char *name, int flags);
+int __init init_chdir(const char *filename);
int __init init_unlink(const char *pathname);
int __init init_rmdir(const char *pathname);
int ksys_chroot(const char __user *filename);
ssize_t ksys_write(unsigned int fd, const char __user *buf, size_t count);
-int ksys_chdir(const char __user *filename);
int ksys_fchown(unsigned int fd, uid_t user, gid_t group);
ssize_t ksys_read(unsigned int fd, char __user *buf, size_t count);
void ksys_sync(void);
if (ret)
goto out;
- ksys_chdir("/root");
+ init_chdir("/root");
s = current->fs->pwd.dentry->d_sb;
ROOT_DEV = s->s_dev;
printk(KERN_INFO
ksys_unshare(CLONE_FS | CLONE_FILES);
console_on_rootfs();
/* move initrd over / and chdir/chroot in initrd root */
- ksys_chdir("/root");
+ init_chdir("/root");
init_mount(".", "/", NULL, MS_MOVE, NULL);
ksys_chroot(".");
ksys_setsid();
/* mount initrd on rootfs' /root */
mount_block_root("/dev/root.old", root_mountflags & ~MS_RDONLY);
ksys_mkdir("/old", 0700);
- ksys_chdir("/old");
+ init_chdir("/old");
/*
* In case that a resume from disk is carried out by linuxrc or one of
ksys_chroot("..");
if (new_decode_dev(real_root_dev) == Root_RAM0) {
- ksys_chdir("/old");
+ init_chdir("/old");
return;
}
- ksys_chdir("/");
+ init_chdir("/");
ROOT_DEV = new_decode_dev(real_root_dev);
mount_root();