From a7a8f4a1e6b309b5365be784a07bbda1ceab2d9e Mon Sep 17 00:00:00 2001 From: Martin Kaistra Date: Tue, 7 Jul 2020 12:31:59 +0200 Subject: ubifs: add option to specify version for new file systems Instead of creating ubifs file systems with UBIFS_FORMAT_VERSION by default, add a module parameter ubifs.default_version to allow the user to specify the desired version. Valid values are 4 to UBIFS_FORMAT_VERSION (currently 5). This way, one can for example create a file system with version 4 on kernel 4.19 which can still be mounted rw when downgrading to kernel 4.9. Signed-off-by: Martin Kaistra Signed-off-by: Richard Weinberger --- fs/ubifs/ubifs.h | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/ubifs/ubifs.h') diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h index bff682309fbe..4ffd832e3b93 100644 --- a/fs/ubifs/ubifs.h +++ b/fs/ubifs/ubifs.h @@ -1504,6 +1504,7 @@ extern const struct file_operations ubifs_dir_operations; extern const struct inode_operations ubifs_dir_inode_operations; extern const struct inode_operations ubifs_symlink_inode_operations; extern struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT]; +extern int ubifs_default_version; /* auth.c */ static inline int ubifs_authenticated(const struct ubifs_info *c) -- cgit v1.2.1