[PATCH 08/12] jbd2: cleanup journal_init_common()

Zhang Yi
2023-07-04T13:44:12Z

From: Zhang Yi <yi.zhang@huawei.com>

Adjust the initialization sequence and error handle of journal_t, moving
load superblock to the begin, and classify others initialization.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
---
fs/jbd2/journal.c | 45 ++++++++++++++++++++++++---------------------
1 file changed, 24 insertions(+), 21 deletions(-)

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 210b532a3673..065b5e789299 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1541,6 +1541,16 @@ static journal_t *journal_init_common(struct block_device *bdev,
if (!journal)
return NULL;

+ journal->j_blocksize = blocksize;
+ journal->j_dev = bdev;
+ journal->j_fs_dev = fs_dev;
+ journal->j_blk_offset = start;
+ journal->j_total_len = len;
+
+ err = journal_load_superblock(journal);
+ if (err)
+ goto err_cleanup;
+
init_waitqueue_head(&journal->j_wait_transaction_locked);
init_waitqueue_head(&journal->j_wait_done_commit);
init_waitqueue_head(&journal->j_wait_commit);
@@ -1552,12 +1562,15 @@ static journal_t *journal_init_common(struct block_device *bdev,
mutex_init(&journal->j_checkpoint_mutex);
spin_lock_init(&journal->j_revoke_lock);
spin_lock_init(&journal->j_list_lock);
+ spin_lock_init(&journal->j_history_lock);
rwlock_init(&journal->j_state_lock);

journal->j_commit_interval = (HZ * JBD2_DEFAULT_MAX_COMMIT_AGE);
journal->j_min_batch_time = 0;
journal->j_max_batch_time = 15000; /* 15ms */
atomic_set(&journal->j_reserved_credits, 0);
+ lockdep_init_map(&journal->j_trans_commit_map, "jbd2_handle",
+ &jbd2_trans_commit_key, 0);

/* The journal is marked for error until we succeed with recovery! */
journal->j_flags = JBD2_ABORT;
@@ -1567,18 +1580,10 @@ static journal_t *journal_init_common(struct block_device *bdev,
if (err)
goto err_cleanup;

- spin_lock_init(&journal->j_history_lock);
-
- lockdep_init_map(&journal->j_trans_commit_map, "jbd2_handle",
- &jbd2_trans_commit_key, 0);
-
- /* journal descriptor can store up to n blocks -bzzz */
- journal->j_blocksize = blocksize;
- journal->j_dev = bdev;
- journal->j_fs_dev = fs_dev;
- journal->j_blk_offset = start;
- journal->j_total_len = len;
- /* We need enough buffers to write out full descriptor block. */
+ /*
+ * journal descriptor can store up to n blocks, we need enough
+ * buffers to write out full descriptor block.
+ */
n = journal->j_blocksize / jbd2_min_tag_size();
journal->j_wbufsize = n;
journal->j_fc_wbuf = NULL;
@@ -1587,7 +1592,8 @@ static journal_t *journal_init_common(struct block_device *bdev,
if (!journal->j_wbuf)
goto err_cleanup;

- err = journal_load_superblock(journal);
+ err = percpu_counter_init(&journal->j_checkpoint_jh_count, 0,
+ GFP_KERNEL);
if (err)
goto err_cleanup;

@@ -1596,21 +1602,18 @@ static journal_t *journal_init_common(struct block_device *bdev,
journal->j_shrinker.count_objects = jbd2_journal_shrink_count;
journal->j_shrinker.seeks = DEFAULT_SEEKS;
journal->j_shrinker.batch = journal->j_max_transaction_buffers;
-
- if (percpu_counter_init(&journal->j_checkpoint_jh_count, 0, GFP_KERNEL))
+ err = register_shrinker(&journal->j_shrinker, "jbd2-journal:(%u:%u)",
+ MAJOR(bdev->bd_dev), MINOR(bdev->bd_dev));
+ if (err)
goto err_cleanup;

- if (register_shrinker(&journal->j_shrinker, "jbd2-journal:(%u:%u)",
- MAJOR(bdev->bd_dev), MINOR(bdev->bd_dev))) {
- percpu_counter_destroy(&journal->j_checkpoint_jh_count);
- goto err_cleanup;
- }
return journal;

err_cleanup:
- brelse(journal->j_sb_buffer);
+ percpu_counter_destroy(&journal->j_checkpoint_jh_count);
kfree(journal->j_wbuf);
jbd2_journal_destroy_revoke(journal);
+ journal_fail_superblock(journal);
kfree(journal);
return NULL;
}
--
2.39.2