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| author |   Harshad Shirwadkar <harshadshirwadkar@gmail.com> | 2020-10-15 13:37:58 -0700 |
|---|---|---|
| committer |   Theodore Ts'o <tytso@mit.edu> | 2020-10-21 23:22:37 -0400 |
| commit | 5b849b5f96b47d82b5a432d8b91a8ad260e1de46 (patch) | |
| tree | ce8db17eb198b300b591bf088463781f690efcac /fs/jbd2 | |
| parent | ext4: main fast-commit commit path (diff) | |
| download | linux-dev-5b849b5f96b47d82b5a432d8b91a8ad260e1de46.tar.xz linux-dev-5b849b5f96b47d82b5a432d8b91a8ad260e1de46.zip | |
jbd2: fast commit recovery path
This patch adds fast commit recovery support in JBD2.
Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20201015203802.3597742-7-harshadshirwadkar@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/jbd2')
| -rw-r--r-- | fs/jbd2/recovery.c | 57 |
1 files changed, 53 insertions, 4 deletions
diff --git a/fs/jbd2/recovery.c b/fs/jbd2/recovery.c index fb134c7a12c8..eb2606133cd8 100644 --- a/fs/jbd2/recovery.c +++ b/fs/jbd2/recovery.c @@ -35,7 +35,6 @@ struct recovery_info int nr_revoke_hits; }; -enum passtype {PASS_SCAN, PASS_REVOKE, PASS_REPLAY}; static int do_one_pass(journal_t *journal, struct recovery_info *info, enum passtype pass); static int scan_revoke_records(journal_t *, struct buffer_head *, @@ -225,10 +224,51 @@ static int count_tags(journal_t *journal, struct buffer_head *bh) /* Make sure we wrap around the log correctly! */ #define wrap(journal, var) \ do { \ - if (var >= (journal)->j_last) \ - var -= ((journal)->j_last - (journal)->j_first); \ + unsigned long _wrap_last = \ + jbd2_has_feature_fast_commit(journal) ? \ + (journal)->j_fc_last : (journal)->j_last; \ + \ + if (var >= _wrap_last) \ + var -= (_wrap_last - (journal)->j_first); \ } while (0) +static int fc_do_one_pass(journal_t *journal, + struct recovery_info *info, enum passtype pass) +{ + unsigned int expected_commit_id = info->end_transaction; + unsigned long next_fc_block; + struct buffer_head *bh; + int err = 0; + + next_fc_block = journal->j_fc_first; + if (!journal->j_fc_replay_callback) + return 0; + + while (next_fc_block <= journal->j_fc_last) { + jbd_debug(3, "Fast commit replay: next block %ld", + next_fc_block); + err = jread(&bh, journal, next_fc_block); + if (err) { + jbd_debug(3, "Fast commit replay: read error"); + break; + } + + jbd_debug(3, "Processing fast commit blk with seq %d"); + err = journal->j_fc_replay_callback(journal, bh, pass, + next_fc_block - journal->j_fc_first, + expected_commit_id); + next_fc_block++; + if (err < 0 || err == JBD2_FC_REPLAY_STOP) + break; + err = 0; + } + + if (err) + jbd_debug(3, "Fast commit replay failed, err = %d\n", err); + + return err; +} + /** * jbd2_journal_recover - recovers a on-disk journal * @journal: the journal to recover @@ -472,7 +512,9 @@ static int do_one_pass(journal_t *journal, break; jbd_debug(2, "Scanning for sequence ID %u at %lu/%lu\n", - next_commit_ID, next_log_block, journal->j_last); + next_commit_ID, next_log_block, + jbd2_has_feature_fast_commit(journal) ? + journal->j_fc_last : journal->j_last); /* Skip over each chunk of the transaction looking * either the next descriptor block or the final commit @@ -834,6 +876,13 @@ static int do_one_pass(journal_t *journal, success = -EIO; } } + + if (jbd2_has_feature_fast_commit(journal) && pass != PASS_REVOKE) { + err = fc_do_one_pass(journal, info, pass); + if (err) + success = err; + } + if (block_error && success == 0) success = -EIO; return success; |