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>

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index f1906fa..1ce1347 100644 (file)
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -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);
        }