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authorMartin Kaistra <martin.kaistra@linutronix.de>2020-07-07 13:31:59 +0300
committerRichard Weinberger <richard@nod.at>2020-08-02 23:23:46 +0300
commita7a8f4a1e6b309b5365be784a07bbda1ceab2d9e (patch)
tree6906568ee4d6f637030fb5cd8d3cc7d6eb6b64c6 /fs/ubifs/ubifs.h
parent92ed301919932f777713b9172e525674157e983d (diff)
downloadlinux-a7a8f4a1e6b309b5365be784a07bbda1ceab2d9e.tar.xz
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 <martin.kaistra@linutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'fs/ubifs/ubifs.h')
-rw-r--r--fs/ubifs/ubifs.h1
1 files changed, 1 insertions, 0 deletions
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)