[PATCH] md: Remove working_disks from raid1 state data

It is equivalent to conf->raid_disks - conf->mddev->degraded.

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/raid1.c b/drivers/md/raid1.c
index 13b59e6..3fc9ec2 100644 (file)
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -271,7 +271,7 @@ static int raid1_end_read_request(struct bio *bio, unsigned int bytes_done, int
         */
        update_head_pos(mirror, r1_bio);
 
-       if (uptodate || conf->working_disks <= 1) {
+       if (uptodate || (conf->raid_disks - conf->mddev->degraded) <= 1) {
                /*
                 * Set R1BIO_Uptodate in our master bio, so that
                 * we will return a good error code for to the higher
@@ -929,7 +929,7 @@ static void status(struct seq_file *seq, mddev_t *mddev)
        int i;
 
        seq_printf(seq, " [%d/%d] [", conf->raid_disks,
-                                               conf->working_disks);
+                  conf->raid_disks - mddev->degraded);
        rcu_read_lock();
        for (i = 0; i < conf->raid_disks; i++) {
                mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
@@ -953,7 +953,7 @@ static void error(mddev_t *mddev, mdk_rdev_t *rdev)
         * else mark the drive as failed
         */
        if (test_bit(In_sync, &rdev->flags)
-           && conf->working_disks == 1)
+           && (conf->raid_disks - mddev->degraded) == 1)
                /*
                 * Don't fail the drive, act as though we were just a
                 * normal single drive
@@ -961,7 +961,6 @@ static void error(mddev_t *mddev, mdk_rdev_t *rdev)
                return;
        if (test_bit(In_sync, &rdev->flags)) {
                mddev->degraded++;
-               conf->working_disks--;
                /*
                 * if recovery is running, make sure it aborts.
                 */
@@ -972,7 +971,7 @@ static void error(mddev_t *mddev, mdk_rdev_t *rdev)
        set_bit(MD_CHANGE_DEVS, &mddev->flags);
        printk(KERN_ALERT "raid1: Disk failure on %s, disabling device. \n"
                "       Operation continuing on %d devices\n",
-               bdevname(rdev->bdev,b), conf->working_disks);
+               bdevname(rdev->bdev,b), conf->raid_disks - mddev->degraded);
 }
 
 static void print_conf(conf_t *conf)
@@ -984,7 +983,7 @@ static void print_conf(conf_t *conf)
                printk("(!conf)\n");
                return;
        }
-       printk(" --- wd:%d rd:%d\n", conf->working_disks,
+       printk(" --- wd:%d rd:%d\n", conf->raid_disks - conf->mddev->degraded,
                conf->raid_disks);
 
        rcu_read_lock();
@@ -1024,7 +1023,6 @@ static int raid1_spare_active(mddev_t *mddev)
                if (rdev
                    && !test_bit(Faulty, &rdev->flags)
                    && !test_bit(In_sync, &rdev->flags)) {
-                       conf->working_disks++;
                        mddev->degraded--;
                        set_bit(In_sync, &rdev->flags);
                }
@@ -1901,15 +1899,11 @@ static int run(mddev_t *mddev)
                        blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);
 
                disk->head_position = 0;
-               if (!test_bit(Faulty, &rdev->flags) && test_bit(In_sync, &rdev->flags))
-                       conf->working_disks++;
        }
        conf->raid_disks = mddev->raid_disks;
        conf->mddev = mddev;
        spin_lock_init(&conf->device_lock);
        INIT_LIST_HEAD(&conf->retry_list);
-       if (conf->working_disks == 1)
-               mddev->recovery_cp = MaxSector;
 
        spin_lock_init(&conf->resync_lock);
        init_waitqueue_head(&conf->wait_barrier);
@@ -1917,11 +1911,6 @@ static int run(mddev_t *mddev)
        bio_list_init(&conf->pending_bio_list);
        bio_list_init(&conf->flushing_bio_list);
 
-       if (!conf->working_disks) {
-               printk(KERN_ERR "raid1: no operational mirrors for %s\n",
-                       mdname(mddev));
-               goto out_free_conf;
-       }
 
        mddev->degraded = 0;
        for (i = 0; i < conf->raid_disks; i++) {
@@ -1934,6 +1923,13 @@ static int run(mddev_t *mddev)
                        mddev->degraded++;
                }
        }
+       if (mddev->degraded == conf->raid_disks) {
+               printk(KERN_ERR "raid1: no operational mirrors for %s\n",
+                       mdname(mddev));
+               goto out_free_conf;
+       }
+       if (conf->raid_disks - mddev->degraded == 1)
+               mddev->recovery_cp = MaxSector;
 
        /*
         * find the first working one and use it as a starting point

diff --git a/include/linux/raid/raid1.h b/include/linux/raid/raid1.h
index 3009c81..0a9ba7c 100644 (file)
--- a/include/linux/raid/raid1.h
+++ b/include/linux/raid/raid1.h
@@ -30,7 +30,6 @@ struct r1_private_data_s {
        mddev_t                 *mddev;
        mirror_info_t           *mirrors;
        int                     raid_disks;
-       int                     working_disks;
        int                     last_used;
        sector_t                next_seq_sect;
        spinlock_t              device_lock;