bci: some more code for testing

[pandora-kernel.git] / drivers / md / md.c

diff --git a/drivers/md/md.c b/drivers/md/md.c
index c7aae66..deeac4b 100644 (file)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2393,6 +2393,8 @@ static void analyze_sbs(mddev_t * mddev)
 
 }
 
+static void md_safemode_timeout(unsigned long data);
+
 static ssize_t
 safe_delay_show(mddev_t *mddev, char *page)
 {
@@ -2432,9 +2434,12 @@ safe_delay_store(mddev_t *mddev, const char *cbuf, size_t len)
        if (msec == 0)
                mddev->safemode_delay = 0;
        else {
+               unsigned long old_delay = mddev->safemode_delay;
                mddev->safemode_delay = (msec*HZ)/1000;
                if (mddev->safemode_delay == 0)
                        mddev->safemode_delay = 1;
+               if (mddev->safemode_delay < old_delay)
+                       md_safemode_timeout((unsigned long)mddev);
        }
        return len;
 }
@@ -3836,8 +3841,6 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
 
                del_timer_sync(&mddev->safemode_timer);
 
-               invalidate_partition(disk, 0);
-
                switch(mode) {
                case 1: /* readonly */
                        err  = -ENXIO;
@@ -4634,6 +4637,11 @@ static int update_size(mddev_t *mddev, sector_t num_sectors)
         */
        if (mddev->sync_thread)
                return -EBUSY;
+       if (mddev->bitmap)
+               /* Sorry, cannot grow a bitmap yet, just remove it,
+                * grow, and re-add.
+                */
+               return -EBUSY;
        rdev_for_each(rdev, tmp, mddev) {
                sector_t avail;
                avail = rdev->size * 2;
@@ -5753,7 +5761,11 @@ void md_do_sync(mddev_t *mddev)
                                         * time 'round when curr_resync == 2
                                         */
                                        continue;
-                               prepare_to_wait(&resync_wait, &wq, TASK_UNINTERRUPTIBLE);
+                               /* We need to wait 'interruptible' so as not to
+                                * contribute to the load average, and not to
+                                * be caught by 'softlockup'
+                                */
+                               prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE);
                                if (!kthread_should_stop() &&
                                    mddev2->curr_resync >= mddev->curr_resync) {
                                        printk(KERN_INFO "md: delaying %s of %s"
@@ -5761,6 +5773,8 @@ void md_do_sync(mddev_t *mddev)
                                               " share one or more physical units)\n",
                                               desc, mdname(mddev), mdname(mddev2));
                                        mddev_put(mddev2);
+                                       if (signal_pending(current))
+                                               flush_signals(current);
                                        schedule();
                                        finish_wait(&resync_wait, &wq);
                                        goto try_again;
@@ -5993,7 +6007,7 @@ static int remove_and_add_spares(mddev_t *mddev)
                        }
                }
 
-       if (mddev->degraded) {
+       if (mddev->degraded && ! mddev->ro) {
                rdev_for_each(rdev, rtmp, mddev) {
                        if (rdev->raid_disk >= 0 &&
                            !test_bit(In_sync, &rdev->flags) &&
@@ -6067,6 +6081,8 @@ void md_check_recovery(mddev_t *mddev)
                flush_signals(current);
        }
 
+       if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery))
+               return;
        if ( ! (
                (mddev->flags && !mddev->external) ||
                test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) ||
@@ -6080,6 +6096,15 @@ void md_check_recovery(mddev_t *mddev)
        if (mddev_trylock(mddev)) {
                int spares = 0;
 
+               if (mddev->ro) {
+                       /* Only thing we do on a ro array is remove
+                        * failed devices.
+                        */
+                       remove_and_add_spares(mddev);
+                       clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+                       goto unlock;
+               }
+
                if (!mddev->external) {
                        int did_change = 0;
                        spin_lock_irq(&mddev->write_lock);
@@ -6117,7 +6142,8 @@ void md_check_recovery(mddev_t *mddev)
                        /* resync has finished, collect result */
                        md_unregister_thread(mddev->sync_thread);
                        mddev->sync_thread = NULL;
-                       if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) {
+                       if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) &&
+                           !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) {
                                /* success...*/
                                /* activate any spares */
                                if (mddev->pers->spare_active(mddev))
@@ -6169,6 +6195,7 @@ void md_check_recovery(mddev_t *mddev)
                } else if ((spares = remove_and_add_spares(mddev))) {
                        clear_bit(MD_RECOVERY_SYNC, &mddev->recovery);
                        clear_bit(MD_RECOVERY_CHECK, &mddev->recovery);
+                       clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery);
                        set_bit(MD_RECOVERY_RECOVER, &mddev->recovery);
                } else if (mddev->recovery_cp < MaxSector) {
                        set_bit(MD_RECOVERY_SYNC, &mddev->recovery);
@@ -6232,7 +6259,11 @@ static int md_notify_reboot(struct notifier_block *this,
 
                for_each_mddev(mddev, tmp)
                        if (mddev_trylock(mddev)) {
-                               do_md_stop (mddev, 1, 0);
+                               /* Force a switch to readonly even array
+                                * appears to still be in use.  Hence
+                                * the '100'.
+                                */
+                               do_md_stop (mddev, 1, 100);
                                mddev_unlock(mddev);
                        }
                /*