Unverified Commit 01bc8e9a authored by Christian Brauner's avatar Christian Brauner
Browse files

porting: document block device freeze and thaw changes 

Link: https://lore.kernel.org/r/20230927-vfs-super-freeze-v1-7-ecc36d9ab4d9@kernel.org
Link: https://lore.kernel.org/r/20231024-vfs-super-freeze-v2-9-599c19f4faac@kernel.org


Reviewed-by: default avatarDarrick J. Wong <djwong@kernel.org>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
parent 97cbed04

Documentation/filesystems/porting.rst

+12 −0
Original line number Diff line number Diff line
@@ -1061,3 +1061,15 @@ export_operations ->encode_fh() no longer has a default implementation to 
encode FILEID_INO32_GEN* file handles.

Filesystems that used the default implementation may use the generic helper

generic_encode_ino32_fh() explicitly.



---



**recommended**



Block device freezing and thawing have been moved to holder operations.



Before this change, get_active_super() would only be able to find the

superblock of the main block device, i.e., the one stored in sb->s_bdev. Block

device freezing now works for any block device owned by a given superblock, not

just the main block device. The get_active_super() helper and bd_fsfreeze_sb

pointer are gone.