X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fmd%2Fraid5.c;h=0b66afef2d82009be4f54c34880df588a8a22b61;hb=b91cba52e9b7b3f1c0037908a192d93a869ca9e5;hp=c6e0e2b26f60368c6cd22cf50c0af87fa361db95;hpb=f0a50d3754c7f1b7f05f45b1c0b35d20445316b5;p=linux-2.6

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index c6e0e2b26f..0b66afef2d 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1516,130 +1516,6 @@ static void copy_data(int frombio, struct bio *bio,
 			   }						  \
 			} while(0)
 
-
-static void compute_block(struct stripe_head *sh, int dd_idx)
-{
-	int i, count, disks = sh->disks;
-	void *ptr[MAX_XOR_BLOCKS], *dest, *p;
-
-	pr_debug("compute_block, stripe %llu, idx %d\n",
-		(unsigned long long)sh->sector, dd_idx);
-
-	dest = page_address(sh->dev[dd_idx].page);
-	memset(dest, 0, STRIPE_SIZE);
-	count = 0;
-	for (i = disks ; i--; ) {
-		if (i == dd_idx)
-			continue;
-		p = page_address(sh->dev[i].page);
-		if (test_bit(R5_UPTODATE, &sh->dev[i].flags))
-			ptr[count++] = p;
-		else
-			printk(KERN_ERR "compute_block() %d, stripe %llu, %d"
-				" not present\n", dd_idx,
-				(unsigned long long)sh->sector, i);
-
-		check_xor();
-	}
-	if (count)
-		xor_blocks(count, STRIPE_SIZE, dest, ptr);
-	set_bit(R5_UPTODATE, &sh->dev[dd_idx].flags);
-}
-
-static void compute_parity5(struct stripe_head *sh, int method)
-{
-	raid5_conf_t *conf = sh->raid_conf;
-	int i, pd_idx = sh->pd_idx, disks = sh->disks, count;
-	void *ptr[MAX_XOR_BLOCKS], *dest;
-	struct bio *chosen;
-
-	pr_debug("compute_parity5, stripe %llu, method %d\n",
-		(unsigned long long)sh->sector, method);
-
-	count = 0;
-	dest = page_address(sh->dev[pd_idx].page);
-	switch(method) {
-	case READ_MODIFY_WRITE:
-		BUG_ON(!test_bit(R5_UPTODATE, &sh->dev[pd_idx].flags));
-		for (i=disks ; i-- ;) {
-			if (i==pd_idx)
-				continue;
-			if (sh->dev[i].towrite &&
-			    test_bit(R5_UPTODATE, &sh->dev[i].flags)) {
-				ptr[count++] = page_address(sh->dev[i].page);
-				chosen = sh->dev[i].towrite;
-				sh->dev[i].towrite = NULL;
-
-				if (test_and_clear_bit(R5_Overlap, &sh->dev[i].flags))
-					wake_up(&conf->wait_for_overlap);
-
-				BUG_ON(sh->dev[i].written);
-				sh->dev[i].written = chosen;
-				check_xor();
-			}
-		}
-		break;
-	case RECONSTRUCT_WRITE:
-		memset(dest, 0, STRIPE_SIZE);
-		for (i= disks; i-- ;)
-			if (i!=pd_idx && sh->dev[i].towrite) {
-				chosen = sh->dev[i].towrite;
-				sh->dev[i].towrite = NULL;
-
-				if (test_and_clear_bit(R5_Overlap, &sh->dev[i].flags))
-					wake_up(&conf->wait_for_overlap);
-
-				BUG_ON(sh->dev[i].written);
-				sh->dev[i].written = chosen;
-			}
-		break;
-	case CHECK_PARITY:
-		break;
-	}
-	if (count) {
-		xor_blocks(count, STRIPE_SIZE, dest, ptr);
-		count = 0;
-	}
-	
-	for (i = disks; i--;)
-		if (sh->dev[i].written) {
-			sector_t sector = sh->dev[i].sector;
-			struct bio *wbi = sh->dev[i].written;
-			while (wbi && wbi->bi_sector < sector + STRIPE_SECTORS) {
-				copy_data(1, wbi, sh->dev[i].page, sector);
-				wbi = r5_next_bio(wbi, sector);
-			}
-
-			set_bit(R5_LOCKED, &sh->dev[i].flags);
-			set_bit(R5_UPTODATE, &sh->dev[i].flags);
-		}
-
-	switch(method) {
-	case RECONSTRUCT_WRITE:
-	case CHECK_PARITY:
-		for (i=disks; i--;)
-			if (i != pd_idx) {
-				ptr[count++] = page_address(sh->dev[i].page);
-				check_xor();
-			}
-		break;
-	case READ_MODIFY_WRITE:
-		for (i = disks; i--;)
-			if (sh->dev[i].written) {
-				ptr[count++] = page_address(sh->dev[i].page);
-				check_xor();
-			}
-	}
-	if (count)
-		xor_blocks(count, STRIPE_SIZE, dest, ptr);
-
-	if (method != CHECK_PARITY) {
-		set_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);
-		set_bit(R5_LOCKED,   &sh->dev[pd_idx].flags);
-	} else
-		clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);
-}
-
 static void compute_parity6(struct stripe_head *sh, int method)
 {
 	raid6_conf_t *conf = sh->raid_conf;
@@ -2326,6 +2202,9 @@ static void handle_issuing_new_write_requests5(raid5_conf_t *conf,
 						"%d for r-m-w\n", i);
 					set_bit(R5_LOCKED, &dev->flags);
 					set_bit(R5_Wantread, &dev->flags);
+					if (!test_and_set_bit(
+						STRIPE_OP_IO, &sh->ops.pending))
+						sh->ops.count++;
 					s->locked++;
 				} else {
 					set_bit(STRIPE_DELAYED, &sh->state);
@@ -2349,6 +2228,9 @@ static void handle_issuing_new_write_requests5(raid5_conf_t *conf,
 						"%d for Reconstruct\n", i);
 					set_bit(R5_LOCKED, &dev->flags);
 					set_bit(R5_Wantread, &dev->flags);
+					if (!test_and_set_bit(
+						STRIPE_OP_IO, &sh->ops.pending))
+						sh->ops.count++;
 					s->locked++;
 				} else {
 					set_bit(STRIPE_DELAYED, &sh->state);
@@ -2545,6 +2427,9 @@ static void handle_parity_checks5(raid5_conf_t *conf, struct stripe_head *sh,
 
 		set_bit(R5_LOCKED, &dev->flags);
 		set_bit(R5_Wantwrite, &dev->flags);
+		if (!test_and_set_bit(STRIPE_OP_IO, &sh->ops.pending))
+			sh->ops.count++;
+
 		clear_bit(STRIPE_DEGRADED, &sh->state);
 		s->locked++;
 		set_bit(STRIPE_INSYNC, &sh->state);
@@ -2930,12 +2815,16 @@ static void handle_stripe5(struct stripe_head *sh)
 		dev = &sh->dev[s.failed_num];
 		if (!test_bit(R5_ReWrite, &dev->flags)) {
 			set_bit(R5_Wantwrite, &dev->flags);
+			if (!test_and_set_bit(STRIPE_OP_IO, &sh->ops.pending))
+				sh->ops.count++;
 			set_bit(R5_ReWrite, &dev->flags);
 			set_bit(R5_LOCKED, &dev->flags);
 			s.locked++;
 		} else {
 			/* let's read it back */
 			set_bit(R5_Wantread, &dev->flags);
+			if (!test_and_set_bit(STRIPE_OP_IO, &sh->ops.pending))
+				sh->ops.count++;
 			set_bit(R5_LOCKED, &dev->flags);
 			s.locked++;
 		}
@@ -2988,64 +2877,6 @@ static void handle_stripe5(struct stripe_head *sh)
 
 	return_io(return_bi);
 
-	for (i=disks; i-- ;) {
-		int rw;
-		struct bio *bi;
-		mdk_rdev_t *rdev;
-		if (test_and_clear_bit(R5_Wantwrite, &sh->dev[i].flags))
-			rw = WRITE;
-		else if (test_and_clear_bit(R5_Wantread, &sh->dev[i].flags))
-			rw = READ;
-		else
-			continue;
- 
-		bi = &sh->dev[i].req;
- 
-		bi->bi_rw = rw;
-		if (rw == WRITE)
-			bi->bi_end_io = raid5_end_write_request;
-		else
-			bi->bi_end_io = raid5_end_read_request;
- 
-		rcu_read_lock();
-		rdev = rcu_dereference(conf->disks[i].rdev);
-		if (rdev && test_bit(Faulty, &rdev->flags))
-			rdev = NULL;
-		if (rdev)
-			atomic_inc(&rdev->nr_pending);
-		rcu_read_unlock();
- 
-		if (rdev) {
-			if (s.syncing || s.expanding || s.expanded)
-				md_sync_acct(rdev->bdev, STRIPE_SECTORS);
-
-			bi->bi_bdev = rdev->bdev;
-			pr_debug("for %llu schedule op %ld on disc %d\n",
-				(unsigned long long)sh->sector, bi->bi_rw, i);
-			atomic_inc(&sh->count);
-			bi->bi_sector = sh->sector + rdev->data_offset;
-			bi->bi_flags = 1 << BIO_UPTODATE;
-			bi->bi_vcnt = 1;	
-			bi->bi_max_vecs = 1;
-			bi->bi_idx = 0;
-			bi->bi_io_vec = &sh->dev[i].vec;
-			bi->bi_io_vec[0].bv_len = STRIPE_SIZE;
-			bi->bi_io_vec[0].bv_offset = 0;
-			bi->bi_size = STRIPE_SIZE;
-			bi->bi_next = NULL;
-			if (rw == WRITE &&
-			    test_bit(R5_ReWrite, &sh->dev[i].flags))
-				atomic_add(STRIPE_SECTORS, &rdev->corrected_errors);
-			generic_make_request(bi);
-		} else {
-			if (rw == WRITE)
-				set_bit(STRIPE_DEGRADED, &sh->state);
-			pr_debug("skip op %ld on disc %d for sector %llu\n",
-				bi->bi_rw, i, (unsigned long long)sh->sector);
-			clear_bit(R5_LOCKED, &sh->dev[i].flags);
-			set_bit(STRIPE_HANDLE, &sh->state);
-		}
-	}
 }
 
 static void handle_stripe6(struct stripe_head *sh, struct page *tmp_page)