xfs: remove xlog_in_core_2_t

Browse source

xlog_in_core_2_t is a really odd type, not only is it grossly
misnamed because it actually is an on-disk structure, but it also
reprents the actual on-disk structure in a rather odd way.

A v1 or small v2 log header look like:

	+-----------------------+
	|      xlog_record      |
	+-----------------------+

while larger v2 log headers look like:

	+-----------------------+
	|      xlog_record      |
	+-----------------------+
	|  xlog_rec_ext_header  |
	+-------------------+---+
	|         .....         |
	+-----------------------+
	|  xlog_rec_ext_header  |
	+-----------------------+

I.e., the ext headers are a variable sized array at the end of the
header.  So instead of declaring a union of xlog_rec_header,
xlog_rec_ext_header and padding to BBSIZE, add the proper padding to
struct struct xlog_rec_header and struct xlog_rec_ext_header, and
add a variable sized array of the latter to the former.  This also
exposes the somewhat unusual scope of the log checksums, which is
made explicitly now by adding proper padding and macro designating
the actual payload length.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: Carlos Maiolino <cem@kernel.org>

...

This commit is contained in:

Christoph Hellwig 2025-10-27 08:05:53 +01:00 • committed by Carlos Maiolino

parent 9ed9df98fc

commit fe985b910e

4 changed files with 26 additions and 35 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

31

fs/xfs/libxfs/xfs_log_format.h

View file

6

fs/xfs/libxfs/xfs_ondisk.h

View file

21

fs/xfs/xfs_log.c

View file

3

fs/xfs/xfs_log_priv.h

View file