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Diffstat (limited to 'drivers/md/md.c')
-rw-r--r--drivers/md/md.c81
1 files changed, 62 insertions, 19 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 83eb78b0013..7cf512a34cc 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -74,6 +74,8 @@ static DEFINE_SPINLOCK(pers_lock);
static void md_print_devices(void);
+static DECLARE_WAIT_QUEUE_HEAD(resync_wait);
+
#define MD_BUG(x...) { printk("md: bug in file %s, line %d\n", __FILE__, __LINE__); md_print_devices(); }
/*
@@ -274,6 +276,7 @@ static mddev_t * mddev_find(dev_t unit)
atomic_set(&new->active, 1);
spin_lock_init(&new->write_lock);
init_waitqueue_head(&new->sb_wait);
+ init_waitqueue_head(&new->recovery_wait);
new->reshape_position = MaxSector;
new->resync_max = MaxSector;
new->level = LEVEL_NONE;
@@ -3013,6 +3016,36 @@ degraded_show(mddev_t *mddev, char *page)
static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded);
static ssize_t
+sync_force_parallel_show(mddev_t *mddev, char *page)
+{
+ return sprintf(page, "%d\n", mddev->parallel_resync);
+}
+
+static ssize_t
+sync_force_parallel_store(mddev_t *mddev, const char *buf, size_t len)
+{
+ long n;
+
+ if (strict_strtol(buf, 10, &n))
+ return -EINVAL;
+
+ if (n != 0 && n != 1)
+ return -EINVAL;
+
+ mddev->parallel_resync = n;
+
+ if (mddev->sync_thread)
+ wake_up(&resync_wait);
+
+ return len;
+}
+
+/* force parallel resync, even with shared block devices */
+static struct md_sysfs_entry md_sync_force_parallel =
+__ATTR(sync_force_parallel, S_IRUGO|S_IWUSR,
+ sync_force_parallel_show, sync_force_parallel_store);
+
+static ssize_t
sync_speed_show(mddev_t *mddev, char *page)
{
unsigned long resync, dt, db;
@@ -3187,6 +3220,7 @@ static struct attribute *md_redundancy_attrs[] = {
&md_sync_min.attr,
&md_sync_max.attr,
&md_sync_speed.attr,
+ &md_sync_force_parallel.attr,
&md_sync_completed.attr,
&md_max_sync.attr,
&md_suspend_lo.attr,
@@ -3691,6 +3725,8 @@ static int do_md_stop(mddev_t * mddev, int mode)
module_put(mddev->pers->owner);
mddev->pers = NULL;
+ /* tell userspace to handle 'inactive' */
+ sysfs_notify(&mddev->kobj, NULL, "array_state");
set_capacity(disk, 0);
mddev->changed = 1;
@@ -3987,8 +4023,8 @@ static int get_bitmap_file(mddev_t * mddev, void __user * arg)
if (!buf)
goto out;
- ptr = file_path(mddev->bitmap->file, buf, sizeof(file->pathname));
- if (!ptr)
+ ptr = d_path(&mddev->bitmap->file->f_path, buf, sizeof(file->pathname));
+ if (IS_ERR(ptr))
goto out;
strcpy(file->pathname, ptr);
@@ -5399,7 +5435,7 @@ void md_done_sync(mddev_t *mddev, int blocks, int ok)
atomic_sub(blocks, &mddev->recovery_active);
wake_up(&mddev->recovery_wait);
if (!ok) {
- set_bit(MD_RECOVERY_ERR, &mddev->recovery);
+ set_bit(MD_RECOVERY_INTR, &mddev->recovery);
md_wakeup_thread(mddev->thread);
// stop recovery, signal do_sync ....
}
@@ -5435,8 +5471,11 @@ void md_write_start(mddev_t *mddev, struct bio *bi)
md_wakeup_thread(mddev->thread);
}
spin_unlock_irq(&mddev->write_lock);
+ sysfs_notify(&mddev->kobj, NULL, "array_state");
}
- wait_event(mddev->sb_wait, mddev->flags==0);
+ wait_event(mddev->sb_wait,
+ !test_bit(MD_CHANGE_CLEAN, &mddev->flags) &&
+ !test_bit(MD_CHANGE_PENDING, &mddev->flags));
}
void md_write_end(mddev_t *mddev)
@@ -5471,13 +5510,17 @@ void md_allow_write(mddev_t *mddev)
mddev->safemode = 1;
spin_unlock_irq(&mddev->write_lock);
md_update_sb(mddev, 0);
+
+ sysfs_notify(&mddev->kobj, NULL, "array_state");
+ /* wait for the dirty state to be recorded in the metadata */
+ wait_event(mddev->sb_wait,
+ !test_bit(MD_CHANGE_CLEAN, &mddev->flags) &&
+ !test_bit(MD_CHANGE_PENDING, &mddev->flags));
} else
spin_unlock_irq(&mddev->write_lock);
}
EXPORT_SYMBOL_GPL(md_allow_write);
-static DECLARE_WAIT_QUEUE_HEAD(resync_wait);
-
#define SYNC_MARKS 10
#define SYNC_MARK_STEP (3*HZ)
void md_do_sync(mddev_t *mddev)
@@ -5541,8 +5584,9 @@ void md_do_sync(mddev_t *mddev)
for_each_mddev(mddev2, tmp) {
if (mddev2 == mddev)
continue;
- if (mddev2->curr_resync &&
- match_mddev_units(mddev,mddev2)) {
+ if (!mddev->parallel_resync
+ && mddev2->curr_resync
+ && match_mddev_units(mddev, mddev2)) {
DEFINE_WAIT(wq);
if (mddev < mddev2 && mddev->curr_resync == 2) {
/* arbitrarily yield */
@@ -5622,7 +5666,6 @@ void md_do_sync(mddev_t *mddev)
window/2,(unsigned long long) max_sectors/2);
atomic_set(&mddev->recovery_active, 0);
- init_waitqueue_head(&mddev->recovery_wait);
last_check = 0;
if (j>2) {
@@ -5647,7 +5690,7 @@ void md_do_sync(mddev_t *mddev)
sectors = mddev->pers->sync_request(mddev, j, &skipped,
currspeed < speed_min(mddev));
if (sectors == 0) {
- set_bit(MD_RECOVERY_ERR, &mddev->recovery);
+ set_bit(MD_RECOVERY_INTR, &mddev->recovery);
goto out;
}
@@ -5670,8 +5713,7 @@ void md_do_sync(mddev_t *mddev)
last_check = io_sectors;
- if (test_bit(MD_RECOVERY_INTR, &mddev->recovery) ||
- test_bit(MD_RECOVERY_ERR, &mddev->recovery))
+ if (test_bit(MD_RECOVERY_INTR, &mddev->recovery))
break;
repeat:
@@ -5725,8 +5767,7 @@ void md_do_sync(mddev_t *mddev)
/* tell personality that we are finished */
mddev->pers->sync_request(mddev, max_sectors, &skipped, 1);
- if (!test_bit(MD_RECOVERY_ERR, &mddev->recovery) &&
- !test_bit(MD_RECOVERY_CHECK, &mddev->recovery) &&
+ if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) &&
mddev->curr_resync > 2) {
if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) {
if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) {
@@ -5795,7 +5836,10 @@ static int remove_and_add_spares(mddev_t *mddev)
}
if (mddev->degraded) {
- rdev_for_each(rdev, rtmp, mddev)
+ rdev_for_each(rdev, rtmp, mddev) {
+ if (rdev->raid_disk >= 0 &&
+ !test_bit(In_sync, &rdev->flags))
+ spares++;
if (rdev->raid_disk < 0
&& !test_bit(Faulty, &rdev->flags)) {
rdev->recovery_offset = 0;
@@ -5813,6 +5857,7 @@ static int remove_and_add_spares(mddev_t *mddev)
} else
break;
}
+ }
}
return spares;
}
@@ -5826,7 +5871,7 @@ static int remove_and_add_spares(mddev_t *mddev)
* to do that as needed.
* When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in
* "->recovery" and create a thread at ->sync_thread.
- * When the thread finishes it sets MD_RECOVERY_DONE (and might set MD_RECOVERY_ERR)
+ * When the thread finishes it sets MD_RECOVERY_DONE
* and wakeups up this thread which will reap the thread and finish up.
* This thread also removes any faulty devices (with nr_pending == 0).
*
@@ -5901,8 +5946,7 @@ 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_ERR, &mddev->recovery) &&
- !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) {
+ if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) {
/* success...*/
/* activate any spares */
mddev->pers->spare_active(mddev);
@@ -5926,7 +5970,6 @@ void md_check_recovery(mddev_t *mddev)
* might be left set
*/
clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
- clear_bit(MD_RECOVERY_ERR, &mddev->recovery);
clear_bit(MD_RECOVERY_INTR, &mddev->recovery);
clear_bit(MD_RECOVERY_DONE, &mddev->recovery);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 07:29:49 +0000