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alistair23-linux
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jbd2: cleanup write flags handling from jbd2_write_superblock() 

Currently jbd2_write_superblock() silently adds REQ_SYNC to flags with
which journal superblock is written. Make this explicit by making flags
passed down to jbd2_write_superblock() contain REQ_SYNC.

CC: linux-ext4@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
hifive-unleashed-5.1
Jan Kara 2017-05-04 11:01:31 -04:00 committed by Theodore Ts'o
parent 00473374b7
commit 17f423b516
1 changed files with 8 additions and 7 deletions
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15
fs/jbd2/journal.c
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@ -926,7 +926,8 @@ int __jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block)
* space and if we lose sb update during power failure we'd replay
* old transaction with possibly newly overwritten data.
*/
ret = jbd2_journal_update_sb_log_tail(journal, tid, block, REQ_FUA);
ret = jbd2_journal_update_sb_log_tail(journal, tid, block,
REQ_SYNC | REQ_FUA);
if (ret)
goto out;
@ -1327,7 +1328,7 @@ static int journal_reset(journal_t *journal)
jbd2_journal_update_sb_log_tail(journal,
journal->j_tail_sequence,
journal->j_tail,
REQ_FUA);
REQ_SYNC | REQ_FUA);
mutex_unlock(&journal->j_checkpoint_mutex);
}
return jbd2_journal_start_thread(journal);
@ -1361,7 +1362,7 @@ static int jbd2_write_superblock(journal_t *journal, int write_flags)
jbd2_superblock_csum_set(journal, sb);
get_bh(bh);
bh->b_end_io = end_buffer_write_sync;
ret = submit_bh(REQ_OP_WRITE, write_flags | REQ_SYNC, bh);
ret = submit_bh(REQ_OP_WRITE, write_flags, bh);
wait_on_buffer(bh);
if (buffer_write_io_error(bh)) {
clear_buffer_write_io_error(bh);
@ -1467,7 +1468,7 @@ void jbd2_journal_update_sb_errno(journal_t *journal)
sb->s_errno = cpu_to_be32(journal->j_errno);
read_unlock(&journal->j_state_lock);
jbd2_write_superblock(journal, REQ_FUA);
jbd2_write_superblock(journal, REQ_SYNC | REQ_FUA);
}
EXPORT_SYMBOL(jbd2_journal_update_sb_errno);
@ -1734,7 +1735,7 @@ int jbd2_journal_destroy(journal_t *journal)
write_unlock(&journal->j_state_lock);
jbd2_mark_journal_empty(journal,
REQ_PREFLUSH | REQ_FUA);
REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
mutex_unlock(&journal->j_checkpoint_mutex);
} else
err = -EIO;
@ -1993,7 +1994,7 @@ int jbd2_journal_flush(journal_t *journal)
* the magic code for a fully-recovered superblock. Any future
* commits of data to the journal will restore the current
* s_start value. */
jbd2_mark_journal_empty(journal, REQ_FUA);
jbd2_mark_journal_empty(journal, REQ_SYNC | REQ_FUA);
mutex_unlock(&journal->j_checkpoint_mutex);
write_lock(&journal->j_state_lock);
J_ASSERT(!journal->j_running_transaction);
@ -2039,7 +2040,7 @@ int jbd2_journal_wipe(journal_t *journal, int write)
if (write) {
/* Lock to make assertions happy... */
mutex_lock(&journal->j_checkpoint_mutex);
jbd2_mark_journal_empty(journal, REQ_FUA);
jbd2_mark_journal_empty(journal, REQ_SYNC | REQ_FUA);
mutex_unlock(&journal->j_checkpoint_mutex);
}