init: add an init_stat helper

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

Signed-off-by: Christoph Hellwig <hch@lst.de>

1 files changed, 15 insertions, 0 deletions

diff --git a/fs/init.c b/fs/init.c
index 145fb31b7a5f..51646ba38099 100644
--- a/fs/init.c
+++ b/fs/init.c
@@ -122,6 +122,21 @@ int __init init_eaccess(const char *filename)
 	return error;
 }
 
+int __init init_stat(const char *filename, struct kstat *stat, int flags)
+{
+	int lookup_flags = (flags & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW;
+	struct path path;
+	int error;
+
+	error = kern_path(filename, lookup_flags, &path);
+	if (error)
+		return error;
+	error = vfs_getattr(&path, stat, STATX_BASIC_STATS,
+			    flags | AT_NO_AUTOMOUNT);
+	path_put(&path);
+	return error;
+}
+
 int __init init_mknod(const char *filename, umode_t mode, unsigned int dev)
 {
 	struct dentry *dentry;