X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=drivers%2Fmd%2Fraid1.c;h=51d9645ed09c5e8ff79aa9e7a6604e94dc274a54;hb=a238b563502a7f458624b9c6404742e441b2f9e8;hp=3f5234fe359330237e6998d1a0d49faaf99c7db3;hpb=41158c7eb22312cfaa256744e1553bb4042ff085;p=~andy%2Flinux

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 3f5234fe359..51d9645ed09 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -561,8 +561,8 @@ static int make_request(request_queue_t *q, struct bio * bio)
 	 * thread has put up a bar for new requests.
 	 * Continue immediately if no resync is active currently.
 	 */
-	if (md_write_start(mddev, bio)==0)
-		return 0;
+	md_write_start(mddev, bio); /* wait on superblock update early */
+
 	spin_lock_irq(&conf->resync_lock);
 	wait_event_lock_irq(conf->wait_resume, !conf->barrier, conf->resync_lock, );
 	conf->nr_pending++;
@@ -893,7 +893,6 @@ static int end_sync_read(struct bio *bio, unsigned int bytes_done, int error)
 	if (!uptodate) {
 		md_error(r1_bio->mddev,
 			 conf->mirrors[r1_bio->read_disk].rdev);
-		set_bit(R1BIO_Degraded, &r1_bio->state);
 	} else
 		set_bit(R1BIO_Uptodate, &r1_bio->state);
 	rdev_dec_pending(conf->mirrors[r1_bio->read_disk].rdev, conf->mddev);
@@ -918,10 +917,9 @@ static int end_sync_write(struct bio *bio, unsigned int bytes_done, int error)
 			mirror = i;
 			break;
 		}
-	if (!uptodate) {
+	if (!uptodate)
 		md_error(mddev, conf->mirrors[mirror].rdev);
-		set_bit(R1BIO_Degraded, &r1_bio->state);
-	}
+
 	update_head_pos(mirror, r1_bio);
 
 	if (atomic_dec_and_test(&r1_bio->remaining)) {
@@ -1109,6 +1107,7 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
 	int i;
 	int write_targets = 0;
 	int sync_blocks;
+	int still_degraded = 0;
 
 	if (!conf->r1buf_pool)
 	{
@@ -1126,21 +1125,22 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
 		 * only be one in raid1 resync.
 		 * We can find the current addess in mddev->curr_resync
 		 */
-		if (!conf->fullsync) {
-			if (mddev->curr_resync < max_sector)
-				bitmap_end_sync(mddev->bitmap,
-						mddev->curr_resync,
+		if (mddev->curr_resync < max_sector) /* aborted */
+			bitmap_end_sync(mddev->bitmap, mddev->curr_resync,
 						&sync_blocks, 1);
-			bitmap_close_sync(mddev->bitmap);
-		}
-		if (mddev->curr_resync >= max_sector)
+		else /* completed sync */
 			conf->fullsync = 0;
+
+		bitmap_close_sync(mddev->bitmap);
 		close_sync(conf);
 		return 0;
 	}
 
-	if (!conf->fullsync &&
-	    !bitmap_start_sync(mddev->bitmap, sector_nr, &sync_blocks)) {
+	/* before building a request, check if we can skip these blocks..
+	 * This call the bitmap_start_sync doesn't actually record anything
+	 */
+	if (!bitmap_start_sync(mddev->bitmap, sector_nr, &sync_blocks, 1) &&
+	    !conf->fullsync) {
 		/* We can skip this block, and probably several more */
 		*skipped = 1;
 		return sync_blocks;
@@ -1205,24 +1205,23 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
 		if (i == disk) {
 			bio->bi_rw = READ;
 			bio->bi_end_io = end_sync_read;
-		} else if (conf->mirrors[i].rdev &&
-			   !conf->mirrors[i].rdev->faulty &&
-			   (!conf->mirrors[i].rdev->in_sync ||
-			    sector_nr + RESYNC_SECTORS > mddev->recovery_cp)) {
+		} else if (conf->mirrors[i].rdev == NULL ||
+			   conf->mirrors[i].rdev->faulty) {
+			still_degraded = 1;
+			continue;
+		} else if (!conf->mirrors[i].rdev->in_sync ||
+			   sector_nr + RESYNC_SECTORS > mddev->recovery_cp) {
 			bio->bi_rw = WRITE;
 			bio->bi_end_io = end_sync_write;
 			write_targets ++;
 		} else
+			/* no need to read or write here */
 			continue;
 		bio->bi_sector = sector_nr + conf->mirrors[i].rdev->data_offset;
 		bio->bi_bdev = conf->mirrors[i].rdev->bdev;
 		bio->bi_private = r1_bio;
 	}
 
-	if (write_targets + 1 < conf->raid_disks)
-		/* array degraded, can't clear bitmap */
-		set_bit(R1BIO_Degraded, &r1_bio->state);
-
 	if (write_targets == 0) {
 		/* There is nowhere to write, so all non-sync
 		 * drives must be failed - so we are finished
@@ -1243,15 +1242,15 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
 			len = (max_sector - sector_nr) << 9;
 		if (len == 0)
 			break;
-		if (!conf->fullsync) {
-			if (sync_blocks == 0) {
-				if (!bitmap_start_sync(mddev->bitmap,
-						       sector_nr, &sync_blocks))
-					break;
-				if (sync_blocks < (PAGE_SIZE>>9))
-					BUG();
-				if (len > (sync_blocks<<9)) len = sync_blocks<<9;
-			}
+		if (sync_blocks == 0) {
+			if (!bitmap_start_sync(mddev->bitmap, sector_nr,
+					&sync_blocks, still_degraded) &&
+					!conf->fullsync)
+				break;
+			if (sync_blocks < (PAGE_SIZE>>9))
+				BUG();
+			if (len > (sync_blocks<<9))
+				len = sync_blocks<<9;
 		}
 
 		for (i=0 ; i < conf->raid_disks; i++) {
@@ -1264,7 +1263,8 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
 					while (i > 0) {
 						i--;
 						bio = r1_bio->bios[i];
-						if (bio->bi_end_io==NULL) continue;
+						if (bio->bi_end_io==NULL)
+							continue;
 						/* remove last page from this bio */
 						bio->bi_vcnt--;
 						bio->bi_size -= len;
@@ -1427,10 +1427,8 @@ out_free_conf:
 	if (conf) {
 		if (conf->r1bio_pool)
 			mempool_destroy(conf->r1bio_pool);
-		if (conf->mirrors)
-			kfree(conf->mirrors);
-		if (conf->poolinfo)
-			kfree(conf->poolinfo);
+		kfree(conf->mirrors);
+		kfree(conf->poolinfo);
 		kfree(conf);
 		mddev->private = NULL;
 	}
@@ -1447,10 +1445,8 @@ static int stop(mddev_t *mddev)
 	blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/
 	if (conf->r1bio_pool)
 		mempool_destroy(conf->r1bio_pool);
-	if (conf->mirrors)
-		kfree(conf->mirrors);
-	if (conf->poolinfo)
-		kfree(conf->poolinfo);
+	kfree(conf->mirrors);
+	kfree(conf->poolinfo);
 	kfree(conf);
 	mddev->private = NULL;
 	return 0;
@@ -1473,6 +1469,7 @@ static int raid1_resize(mddev_t *mddev, sector_t sectors)
 		set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
 	}
 	mddev->size = mddev->array_size;
+	mddev->resync_max_sectors = sectors;
 	return 0;
 }