md: pass in max_sectors for pers->sync_request()

For different sync_action, sync_thread will use different max_sectors,
see details in md_sync_max_sectors(), currently both md_do_sync() and
pers->sync_request() in eatch iteration have to get the same
max_sectors. Hence pass in max_sectors for pers->sync_request() to
prevent redundant code.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>

drivers/md/md.c

@@ -9186,7 +9186,8 @@ void md_do_sync(struct md_thread *thread)
 		if (test_bit(MD_RECOVERY_INTR, &mddev->recovery))
 			break;
 
-		sectors = mddev->pers->sync_request(mddev, j, &skipped);
+		sectors = mddev->pers->sync_request(mddev, j, max_sectors,
+						    &skipped);
 		if (sectors == 0) {
 			set_bit(MD_RECOVERY_INTR, &mddev->recovery);
 			break;
@@ -9276,7 +9277,7 @@ void md_do_sync(struct md_thread *thread)
 		mddev->curr_resync_completed = mddev->curr_resync;
 		sysfs_notify_dirent_safe(mddev->sysfs_completed);
 	}
-	mddev->pers->sync_request(mddev, max_sectors, &skipped);
+	mddev->pers->sync_request(mddev, max_sectors, max_sectors, &skipped);
 
 	if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) &&
 	    mddev->curr_resync > MD_RESYNC_ACTIVE) {

drivers/md/md.h

@@ -728,7 +728,8 @@ struct md_personality
 	int (*hot_add_disk) (struct mddev *mddev, struct md_rdev *rdev);
 	int (*hot_remove_disk) (struct mddev *mddev, struct md_rdev *rdev);
 	int (*spare_active) (struct mddev *mddev);
-	sector_t (*sync_request)(struct mddev *mddev, sector_t sector_nr, int *skipped);
+	sector_t (*sync_request)(struct mddev *mddev, sector_t sector_nr,
+				 sector_t max_sector, int *skipped);
 	int (*resize) (struct mddev *mddev, sector_t sectors);
 	sector_t (*size) (struct mddev *mddev, sector_t sectors, int raid_disks);
 	int (*check_reshape) (struct mddev *mddev);

drivers/md/raid1.c

@@ -2757,12 +2757,12 @@ static struct r1bio *raid1_alloc_init_r1buf(struct r1conf *conf)
  */
 
 static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
-				   int *skipped)
+				   sector_t max_sector, int *skipped)
 {
 	struct r1conf *conf = mddev->private;
 	struct r1bio *r1_bio;
 	struct bio *bio;
-	sector_t max_sector, nr_sectors;
+	sector_t nr_sectors;
 	int disk = -1;
 	int i;
 	int wonly = -1;
@@ -2778,7 +2778,6 @@ static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
 		if (init_resync(conf))
 			return 0;
 
-	max_sector = mddev->dev_sectors;
 	if (sector_nr >= max_sector) {
 		/* If we aborted, we need to abort the
 		 * sync on the 'current' bitmap chunk (there will

drivers/md/raid10.c

@@ -3140,12 +3140,12 @@ static void raid10_set_cluster_sync_high(struct r10conf *conf)
  */
 
 static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
-			     int *skipped)
+				    sector_t max_sector, int *skipped)
 {
 	struct r10conf *conf = mddev->private;
 	struct r10bio *r10_bio;
 	struct bio *biolist = NULL, *bio;
-	sector_t max_sector, nr_sectors;
+	sector_t nr_sectors;
 	int i;
 	int max_sync;
 	sector_t sync_blocks;
@@ -3175,10 +3175,6 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
 			return 0;
 
  skipped:
-	max_sector = mddev->dev_sectors;
-	if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ||
-	    test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery))
-		max_sector = mddev->resync_max_sectors;
 	if (sector_nr >= max_sector) {
 		conf->cluster_sync_low = 0;
 		conf->cluster_sync_high = 0;

drivers/md/raid5.c

@@ -6459,11 +6459,10 @@ static sector_t reshape_request(struct mddev *mddev, sector_t sector_nr, int *sk
 }
 
 static inline sector_t raid5_sync_request(struct mddev *mddev, sector_t sector_nr,
-					  int *skipped)
+					  sector_t max_sector, int *skipped)
 {
 	struct r5conf *conf = mddev->private;
 	struct stripe_head *sh;
-	sector_t max_sector = mddev->dev_sectors;
 	sector_t sync_blocks;
 	int still_degraded = 0;
 	int i;