jbd2: use SWRITE_SYNC_PLUG when writing synchronous revoke records

The revoke records must be written using the same way as the rest of
the blocks during the commit process; that is, either marked as
synchronous writes or as asynchornous writes.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

fs/jbd2/commit.c

@@ -506,7 +506,8 @@ void jbd2_journal_commit_transaction(journal_t *journal)
 	if (err)
 		jbd2_journal_abort(journal, err);
 
-	jbd2_journal_write_revoke_records(journal, commit_transaction);
+	jbd2_journal_write_revoke_records(journal, commit_transaction,
+					  write_op);
 
 	jbd_debug(3, "JBD: commit phase 2\n");
 

fs/jbd2/revoke.c

@@ -86,6 +86,7 @@
 #include <linux/slab.h>
 #include <linux/list.h>
 #include <linux/init.h>
+#include <linux/bio.h>
 #endif
 #include <linux/log2.h>
 
@@ -118,8 +119,8 @@ struct jbd2_revoke_table_s
 #ifdef __KERNEL__
 static void write_one_revoke_record(journal_t *, transaction_t *,
 				    struct journal_head **, int *,
-				    struct jbd2_revoke_record_s *);
-static void flush_descriptor(journal_t *, struct journal_head *, int);
+				    struct jbd2_revoke_record_s *, int);
+static void flush_descriptor(journal_t *, struct journal_head *, int, int);
 #endif
 
 /* Utility functions to maintain the revoke table */
@@ -499,7 +500,8 @@ void jbd2_journal_switch_revoke_table(journal_t *journal)
  * revoke hash, deleting the entries as we go.
  */
 void jbd2_journal_write_revoke_records(journal_t *journal,
-				  transaction_t *transaction)
+				       transaction_t *transaction,
+				       int write_op)
 {
 	struct journal_head *descriptor;
 	struct jbd2_revoke_record_s *record;
@@ -523,14 +525,14 @@ void jbd2_journal_write_revoke_records(journal_t *journal,
 				hash_list->next;
 			write_one_revoke_record(journal, transaction,
 						&descriptor, &offset,
-						record);
+						record, write_op);
 			count++;
 			list_del(&record->hash);
 			kmem_cache_free(jbd2_revoke_record_cache, record);
 		}
 	}
 	if (descriptor)
-		flush_descriptor(journal, descriptor, offset);
+		flush_descriptor(journal, descriptor, offset, write_op);
 	jbd_debug(1, "Wrote %d revoke records\n", count);
 }
 
@@ -543,7 +545,8 @@ static void write_one_revoke_record(journal_t *journal,
 				    transaction_t *transaction,
 				    struct journal_head **descriptorp,
 				    int *offsetp,
-				    struct jbd2_revoke_record_s *record)
+				    struct jbd2_revoke_record_s *record,
+				    int write_op)
 {
 	struct journal_head *descriptor;
 	int offset;
@@ -562,7 +565,7 @@ static void write_one_revoke_record(journal_t *journal,
 	/* Make sure we have a descriptor with space left for the record */
 	if (descriptor) {
 		if (offset == journal->j_blocksize) {
-			flush_descriptor(journal, descriptor, offset);
+			flush_descriptor(journal, descriptor, offset, write_op);
 			descriptor = NULL;
 		}
 	}
@@ -607,7 +610,7 @@ static void write_one_revoke_record(journal_t *journal,
 
 static void flush_descriptor(journal_t *journal,
 			     struct journal_head *descriptor,
-			     int offset)
+			     int offset, int write_op)
 {
 	jbd2_journal_revoke_header_t *header;
 	struct buffer_head *bh = jh2bh(descriptor);
@@ -622,7 +625,7 @@ static void flush_descriptor(journal_t *journal,
 	set_buffer_jwrite(bh);
 	BUFFER_TRACE(bh, "write");
 	set_buffer_dirty(bh);
-	ll_rw_block(SWRITE, 1, &bh);
+	ll_rw_block((write_op == WRITE) ? SWRITE : SWRITE_SYNC_PLUG, 1, &bh);
 }
 #endif
 

include/linux/jbd2.h

@@ -1193,7 +1193,8 @@ extern int	   jbd2_journal_init_revoke_caches(void);
 extern void	   jbd2_journal_destroy_revoke(journal_t *);
 extern int	   jbd2_journal_revoke (handle_t *, unsigned long long, struct buffer_head *);
 extern int	   jbd2_journal_cancel_revoke(handle_t *, struct journal_head *);
-extern void	   jbd2_journal_write_revoke_records(journal_t *, transaction_t *);
+extern void	   jbd2_journal_write_revoke_records(journal_t *,
+						     transaction_t *, int);
 
 /* Recovery revoke support */
 extern int	jbd2_journal_set_revoke(journal_t *, unsigned long long, tid_t);