From: Christian Brauner Date: Tue, 24 Oct 2023 13:01:15 +0000 (+0200) Subject: porting: document block device freeze and thaw changes X-Git-Tag: v6.8-rc1~214^2~18 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=01bc8e9ae23a4257e12c87f5caa0f21034e7b40b;p=thirdparty%2Flinux.git 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: Darrick J. Wong Reviewed-by: Jan Kara Signed-off-by: Christian Brauner --- diff --git a/Documentation/filesystems/porting.rst b/Documentation/filesystems/porting.rst index 878e72b2f8b76..ced3a67613293 100644 --- a/Documentation/filesystems/porting.rst +++ b/Documentation/filesystems/porting.rst @@ -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.