diff options
| author | Harshad Shirwadkar <harshadshirwadkar@gmail.com> | 2020-11-05 19:58:54 -0800 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2020-11-06 23:01:02 -0500 |
| commit | ede7dc7fa0af619afc08995776eadb9ff3b0a711 (patch) | |
| tree | d1a6596d27bca10f74edfa11fa4ae287c24147d8 /fs/jbd2/journal.c | |
| parent | a80f7fcf18672ae4971a6b713b58c0d389aa99fe (diff) | |
| download | lwn-ede7dc7fa0af619afc08995776eadb9ff3b0a711.tar.gz lwn-ede7dc7fa0af619afc08995776eadb9ff3b0a711.zip | |
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>
Diffstat (limited to 'fs/jbd2/journal.c')
| -rw-r--r-- | fs/jbd2/journal.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 0c7c42bd530f..c3c768248527 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -1348,7 +1348,7 @@ static journal_t *journal_init_common(struct block_device *bdev, journal->j_dev = bdev; journal->j_fs_dev = fs_dev; journal->j_blk_offset = start; - journal->j_maxlen = len; + journal->j_total_len = len; /* We need enough buffers to write out full descriptor block. */ n = journal->j_blocksize / jbd2_min_tag_size(); journal->j_wbufsize = n; @@ -1531,7 +1531,7 @@ static int journal_reset(journal_t *journal) journal->j_commit_sequence = journal->j_transaction_sequence - 1; journal->j_commit_request = journal->j_commit_sequence; - journal->j_max_transaction_buffers = journal->j_maxlen / 4; + journal->j_max_transaction_buffers = jbd2_journal_get_max_txn_bufs(journal); /* * As a special case, if the on-disk copy is already marked as needing @@ -1792,15 +1792,15 @@ static int journal_get_superblock(journal_t *journal) goto out; } - if (be32_to_cpu(sb->s_maxlen) < journal->j_maxlen) - journal->j_maxlen = be32_to_cpu(sb->s_maxlen); - else if (be32_to_cpu(sb->s_maxlen) > journal->j_maxlen) { + if (be32_to_cpu(sb->s_maxlen) < journal->j_total_len) + journal->j_total_len = be32_to_cpu(sb->s_maxlen); + else if (be32_to_cpu(sb->s_maxlen) > journal->j_total_len) { printk(KERN_WARNING "JBD2: journal file too short\n"); goto out; } if (be32_to_cpu(sb->s_first) == 0 || - be32_to_cpu(sb->s_first) >= journal->j_maxlen) { + be32_to_cpu(sb->s_first) >= journal->j_total_len) { printk(KERN_WARNING "JBD2: Invalid start block of journal: %u\n", be32_to_cpu(sb->s_first)); |