jbd2: rename j_maxlen to j_total_len and add jbd2_journal_max_txn_bufs
authorHarshad Shirwadkar <harshadshirwadkar@gmail.com>
Fri, 6 Nov 2020 03:58:54 +0000 (19:58 -0800)
committerTheodore Ts'o <tytso@mit.edu>
Sat, 7 Nov 2020 04:01:02 +0000 (23:01 -0500)
commitede7dc7fa0af619afc08995776eadb9ff3b0a711
treed1a6596d27bca10f74edfa11fa4ae287c24147d8
parenta80f7fcf18672ae4971a6b713b58c0d389aa99fe
jbd2: rename j_maxlen to j_total_len and add jbd2_journal_max_txn_bufs

The on-disk superblock field sb->s_maxlen represents the total size of
the journal including the fast commit area and is no more the max
number of blocks available for a transaction. The maximum number of
blocks available to a transaction is reduced by the number of fast
commit blocks. So, this patch renames j_maxlen to j_total_len to
better represent its intent. Also, it adds a function to calculate max
number of bufs available for a transaction.

Suggested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20201106035911.1942128-6-harshadshirwadkar@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
fs/ext4/fsmap.c
fs/ext4/super.c
fs/jbd2/commit.c
fs/jbd2/journal.c
fs/jbd2/recovery.c
fs/ocfs2/journal.c
include/linux/jbd2.h