[21/21] init: add an init_utimes helper

Commit Message

Christoph Hellwig July 26, 2020, 7:13 a.m. UTC

Add a simple helper to set timestamps with a kernel space file name and
switch the early init code over to it.

Signed-off-by: Christoph Hellwig <[e-mail]>
---
 fs/for_init.c                 | 13 +++++++++++++
 include/linux/init_syscalls.h |  1 +
 init/initramfs.c              |  3 +--
 3 files changed, 15 insertions(+), 2 deletions(-)

Patch

diff --git a/fs/for_init.c b/fs/for_init.c
index 919a50130a5919..4eee11ad63ffce 100644
--- a/fs/for_init.c
+++ b/fs/for_init.c
@@ -234,3 +234,16 @@  int __init init_rmdir(const char *pathname)
 {
 	return do_rmdir(AT_FDCWD, getname_kernel(pathname));
 }
+
+int __init init_utimes(char *filename, struct timespec64 *ts)
+{
+	struct path path;
+	int error;
+
+	error = kern_path(filename, 0, &path);
+	if (error)
+		return error;
+	error = vfs_utimes(&path, ts);
+	path_put(&path);
+	return error;
+}
diff --git a/include/linux/init_syscalls.h b/include/linux/init_syscalls.h
index b2fda50daca6c5..3654b525ac0b17 100644
--- a/include/linux/init_syscalls.h
+++ b/include/linux/init_syscalls.h
@@ -15,3 +15,4 @@  int __init init_symlink(const char *oldname, const char *newname);
 int __init init_unlink(const char *pathname);
 int __init init_mkdir(const char *pathname, umode_t mode);
 int __init init_rmdir(const char *pathname);
+int __init init_utimes(char *filename, struct timespec64 *ts);
diff --git a/init/initramfs.c b/init/initramfs.c
index b1be3ada3ce4b3..b9dfc941a4c3e4 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -110,8 +110,7 @@  static long __init do_utime(char *filename, time64_t mtime)
 	t[0].tv_nsec = 0;
 	t[1].tv_sec = mtime;
 	t[1].tv_nsec = 0;
-
-	return do_utimes(AT_FDCWD, filename, t, AT_SYMLINK_NOFOLLOW);
+	return init_utimes(filename, t);
 }
 
 static __initdata LIST_HEAD(dir_list);