[PATCH] md: small cleanups for raid5
Resync code:
A test that isn't needed,
a 'compute_block' that makes more sense
elsewhere (And then doesn't need a test),
a couple of BUG_ONs to confirm the change makes sense.
Printks:
A few were missing KERN_*
Also fix a typo in a comment..
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index fafc4bc..334ff7a 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -417,7 +417,7 @@
set_bit(R5_UPTODATE, &sh->dev[i].flags);
#endif
if (test_bit(R5_ReadError, &sh->dev[i].flags)) {
- printk("R5: read error corrected!!\n");
+ printk(KERN_INFO "raid5: read error corrected!!\n");
clear_bit(R5_ReadError, &sh->dev[i].flags);
clear_bit(R5_ReWrite, &sh->dev[i].flags);
}
@@ -428,13 +428,14 @@
clear_bit(R5_UPTODATE, &sh->dev[i].flags);
atomic_inc(&conf->disks[i].rdev->read_errors);
if (conf->mddev->degraded)
- printk("R5: read error not correctable.\n");
+ printk(KERN_WARNING "raid5: read error not correctable.\n");
else if (test_bit(R5_ReWrite, &sh->dev[i].flags))
/* Oh, no!!! */
- printk("R5: read error NOT corrected!!\n");
+ printk(KERN_WARNING "raid5: read error NOT corrected!!\n");
else if (atomic_read(&conf->disks[i].rdev->read_errors)
> conf->max_nr_stripes)
- printk("raid5: Too many read errors, failing device.\n");
+ printk(KERN_WARNING
+ "raid5: Too many read errors, failing device.\n");
else
retry = 1;
if (retry)
@@ -604,7 +605,7 @@
*dd_idx = (*pd_idx + 1 + *dd_idx) % raid_disks;
break;
default:
- printk("raid5: unsupported algorithm %d\n",
+ printk(KERN_ERR "raid5: unsupported algorithm %d\n",
conf->algorithm);
}
@@ -645,7 +646,7 @@
i -= (sh->pd_idx + 1);
break;
default:
- printk("raid5: unsupported algorithm %d\n",
+ printk(KERN_ERR "raid5: unsupported algorithm %d\n",
conf->algorithm);
}
@@ -654,7 +655,7 @@
check = raid5_compute_sector (r_sector, raid_disks, data_disks, &dummy1, &dummy2, conf);
if (check != sh->sector || dummy1 != dd_idx || dummy2 != sh->pd_idx) {
- printk("compute_blocknr: map not correct\n");
+ printk(KERN_ERR "compute_blocknr: map not correct\n");
return 0;
}
return r_sector;
@@ -737,7 +738,7 @@
if (test_bit(R5_UPTODATE, &sh->dev[i].flags))
ptr[count++] = p;
else
- printk("compute_block() %d, stripe %llu, %d"
+ printk(KERN_ERR "compute_block() %d, stripe %llu, %d"
" not present\n", dd_idx,
(unsigned long long)sh->sector, i);
@@ -1005,7 +1006,7 @@
if (dev->written) written++;
rdev = conf->disks[i].rdev; /* FIXME, should I be looking rdev */
if (!rdev || !test_bit(In_sync, &rdev->flags)) {
- /* The ReadError flag wil just be confusing now */
+ /* The ReadError flag will just be confusing now */
clear_bit(R5_ReadError, &dev->flags);
clear_bit(R5_ReWrite, &dev->flags);
}
@@ -1288,7 +1289,7 @@
* is available
*/
if (syncing && locked == 0 &&
- !test_bit(STRIPE_INSYNC, &sh->state) && failed <= 1) {
+ !test_bit(STRIPE_INSYNC, &sh->state)) {
set_bit(STRIPE_HANDLE, &sh->state);
if (failed == 0) {
char *pagea;
@@ -1306,21 +1307,20 @@
if (test_bit(MD_RECOVERY_CHECK, &conf->mddev->recovery))
/* don't try to repair!! */
set_bit(STRIPE_INSYNC, &sh->state);
+ else {
+ compute_block(sh, sh->pd_idx);
+ uptodate++;
+ }
}
}
if (!test_bit(STRIPE_INSYNC, &sh->state)) {
+ /* either failed parity check, or recovery is happening */
if (failed==0)
failed_num = sh->pd_idx;
- /* should be able to compute the missing block and write it to spare */
- if (!test_bit(R5_UPTODATE, &sh->dev[failed_num].flags)) {
- if (uptodate+1 != disks)
- BUG();
- compute_block(sh, failed_num);
- uptodate++;
- }
- if (uptodate != disks)
- BUG();
dev = &sh->dev[failed_num];
+ BUG_ON(!test_bit(R5_UPTODATE, &dev->flags));
+ BUG_ON(uptodate != disks);
+
set_bit(R5_LOCKED, &dev->flags);
set_bit(R5_Wantwrite, &dev->flags);
clear_bit(STRIPE_DEGRADED, &sh->state);
@@ -1822,7 +1822,8 @@
struct list_head *tmp;
if (mddev->level != 5 && mddev->level != 4) {
- printk("raid5: %s: raid level not set to 4/5 (%d)\n", mdname(mddev), mddev->level);
+ printk(KERN_ERR "raid5: %s: raid level not set to 4/5 (%d)\n",
+ mdname(mddev), mddev->level);
return -EIO;
}