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-rw-r--r--drivers/md/md.c76
-rw-r--r--drivers/md/multipath.c3
-rw-r--r--drivers/md/raid1.c2
-rw-r--r--drivers/md/raid10.c2
-rw-r--r--drivers/md/raid5.c8
-rw-r--r--include/linux/raid/md.h1
-rw-r--r--include/linux/raid/md_k.h6
7 files changed, 52 insertions, 46 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 3af6f1f06020..8b08043f07ef 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1587,7 +1587,7 @@ static void sync_sbs(mddev_t * mddev, int nospares)
}
}
-void md_update_sb(mddev_t * mddev)
+static void md_update_sb(mddev_t * mddev, int force_change)
{
int err;
struct list_head *tmp;
@@ -1598,7 +1598,18 @@ void md_update_sb(mddev_t * mddev)
repeat:
spin_lock_irq(&mddev->write_lock);
- if (mddev->degraded && mddev->sb_dirty == 3)
+ set_bit(MD_CHANGE_PENDING, &mddev->flags);
+ if (test_and_clear_bit(MD_CHANGE_DEVS, &mddev->flags))
+ force_change = 1;
+ if (test_and_clear_bit(MD_CHANGE_CLEAN, &mddev->flags))
+ /* just a clean<-> dirty transition, possibly leave spares alone,
+ * though if events isn't the right even/odd, we will have to do
+ * spares after all
+ */
+ nospares = 1;
+ if (force_change)
+ nospares = 0;
+ if (mddev->degraded)
/* If the array is degraded, then skipping spares is both
* dangerous and fairly pointless.
* Dangerous because a device that was removed from the array
@@ -1608,20 +1619,14 @@ repeat:
* then a recovery will happen and soon that array won't
* be degraded any more and the spare can go back to sleep then.
*/
- mddev->sb_dirty = 1;
+ nospares = 0;
sync_req = mddev->in_sync;
mddev->utime = get_seconds();
- if (mddev->sb_dirty == 3)
- /* just a clean<-> dirty transition, possibly leave spares alone,
- * though if events isn't the right even/odd, we will have to do
- * spares after all
- */
- nospares = 1;
/* If this is just a dirty<->clean transition, and the array is clean
* and 'events' is odd, we can roll back to the previous clean state */
- if (mddev->sb_dirty == 3
+ if (nospares
&& (mddev->in_sync && mddev->recovery_cp == MaxSector)
&& (mddev->events & 1))
mddev->events--;
@@ -1652,7 +1657,6 @@ repeat:
MD_BUG();
mddev->events --;
}
- mddev->sb_dirty = 2;
sync_sbs(mddev, nospares);
/*
@@ -1660,7 +1664,7 @@ repeat:
* nonpersistent superblocks
*/
if (!mddev->persistent) {
- mddev->sb_dirty = 0;
+ clear_bit(MD_CHANGE_PENDING, &mddev->flags);
spin_unlock_irq(&mddev->write_lock);
wake_up(&mddev->sb_wait);
return;
@@ -1697,20 +1701,20 @@ repeat:
break;
}
md_super_wait(mddev);
- /* if there was a failure, sb_dirty was set to 1, and we re-write super */
+ /* if there was a failure, MD_CHANGE_DEVS was set, and we re-write super */
spin_lock_irq(&mddev->write_lock);
- if (mddev->in_sync != sync_req|| mddev->sb_dirty == 1) {
+ if (mddev->in_sync != sync_req ||
+ test_bit(MD_CHANGE_DEVS, &mddev->flags)) {
/* have to write it out again */
spin_unlock_irq(&mddev->write_lock);
goto repeat;
}
- mddev->sb_dirty = 0;
+ clear_bit(MD_CHANGE_PENDING, &mddev->flags);
spin_unlock_irq(&mddev->write_lock);
wake_up(&mddev->sb_wait);
}
-EXPORT_SYMBOL_GPL(md_update_sb);
/* words written to sysfs files may, or my not, be \n terminated.
* We want to accept with case. For this we use cmd_match.
@@ -1783,7 +1787,7 @@ state_store(mdk_rdev_t *rdev, const char *buf, size_t len)
else {
mddev_t *mddev = rdev->mddev;
kick_rdev_from_array(rdev);
- md_update_sb(mddev);
+ md_update_sb(mddev, 1);
md_new_event(mddev);
err = 0;
}
@@ -2426,7 +2430,7 @@ array_state_store(mddev_t *mddev, const char *buf, size_t len)
spin_lock_irq(&mddev->write_lock);
if (atomic_read(&mddev->writes_pending) == 0) {
mddev->in_sync = 1;
- mddev->sb_dirty = 1;
+ set_bit(MD_CHANGE_CLEAN, &mddev->flags);
}
spin_unlock_irq(&mddev->write_lock);
} else {
@@ -2438,7 +2442,7 @@ array_state_store(mddev_t *mddev, const char *buf, size_t len)
case active:
if (mddev->pers) {
restart_array(mddev);
- mddev->sb_dirty = 0;
+ clear_bit(MD_CHANGE_CLEAN, &mddev->flags);
wake_up(&mddev->sb_wait);
err = 0;
} else {
@@ -2543,7 +2547,7 @@ size_store(mddev_t *mddev, const char *buf, size_t len)
if (mddev->pers) {
err = update_size(mddev, size);
- md_update_sb(mddev);
+ md_update_sb(mddev, 1);
} else {
if (mddev->size == 0 ||
mddev->size > size)
@@ -3111,8 +3115,8 @@ static int do_md_run(mddev_t * mddev)
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
- if (mddev->sb_dirty)
- md_update_sb(mddev);
+ if (mddev->flags)
+ md_update_sb(mddev, 0);
set_capacity(disk, mddev->array_size<<1);
@@ -3275,10 +3279,10 @@ static int do_md_stop(mddev_t * mddev, int mode)
if (mddev->ro)
mddev->ro = 0;
}
- if (!mddev->in_sync || mddev->sb_dirty) {
+ if (!mddev->in_sync || mddev->flags) {
/* mark array as shutdown cleanly */
mddev->in_sync = 1;
- md_update_sb(mddev);
+ md_update_sb(mddev, 1);
}
if (mode == 1)
set_disk_ro(disk, 1);
@@ -3747,7 +3751,7 @@ static int hot_remove_disk(mddev_t * mddev, dev_t dev)
goto busy;
kick_rdev_from_array(rdev);
- md_update_sb(mddev);
+ md_update_sb(mddev, 1);
md_new_event(mddev);
return 0;
@@ -3824,7 +3828,7 @@ static int hot_add_disk(mddev_t * mddev, dev_t dev)
rdev->raid_disk = -1;
- md_update_sb(mddev);
+ md_update_sb(mddev, 1);
/*
* Kick recovery, maybe this spare has to be added to the
@@ -3955,7 +3959,8 @@ static int set_array_info(mddev_t * mddev, mdu_array_info_t *info)
mddev->max_disks = MD_SB_DISKS;
- mddev->sb_dirty = 1;
+ mddev->flags = 0;
+ set_bit(MD_CHANGE_DEVS, &mddev->flags);
mddev->default_bitmap_offset = MD_SB_BYTES >> 9;
mddev->bitmap_offset = 0;
@@ -4124,7 +4129,7 @@ static int update_array_info(mddev_t *mddev, mdu_array_info_t *info)
mddev->bitmap_offset = 0;
}
}
- md_update_sb(mddev);
+ md_update_sb(mddev, 1);
return rv;
}
@@ -4960,12 +4965,12 @@ void md_write_start(mddev_t *mddev, struct bio *bi)
spin_lock_irq(&mddev->write_lock);
if (mddev->in_sync) {
mddev->in_sync = 0;
- mddev->sb_dirty = 3;
+ set_bit(MD_CHANGE_CLEAN, &mddev->flags);
md_wakeup_thread(mddev->thread);
}
spin_unlock_irq(&mddev->write_lock);
}
- wait_event(mddev->sb_wait, mddev->sb_dirty==0);
+ wait_event(mddev->sb_wait, mddev->flags==0);
}
void md_write_end(mddev_t *mddev)
@@ -5235,7 +5240,6 @@ void md_do_sync(mddev_t *mddev)
!test_bit(In_sync, &rdev->flags) &&
rdev->recovery_offset < mddev->curr_resync)
rdev->recovery_offset = mddev->curr_resync;
- mddev->sb_dirty = 1;
}
}
@@ -5292,7 +5296,7 @@ void md_check_recovery(mddev_t *mddev)
}
if ( ! (
- mddev->sb_dirty ||
+ mddev->flags ||
test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) ||
test_bit(MD_RECOVERY_DONE, &mddev->recovery) ||
(mddev->safemode == 1) ||
@@ -5308,14 +5312,14 @@ void md_check_recovery(mddev_t *mddev)
if (mddev->safemode && !atomic_read(&mddev->writes_pending) &&
!mddev->in_sync && mddev->recovery_cp == MaxSector) {
mddev->in_sync = 1;
- mddev->sb_dirty = 3;
+ set_bit(MD_CHANGE_CLEAN, &mddev->flags);
}
if (mddev->safemode == 1)
mddev->safemode = 0;
spin_unlock_irq(&mddev->write_lock);
- if (mddev->sb_dirty)
- md_update_sb(mddev);
+ if (mddev->flags)
+ md_update_sb(mddev, 0);
if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) &&
@@ -5334,7 +5338,7 @@ void md_check_recovery(mddev_t *mddev)
/* activate any spares */
mddev->pers->spare_active(mddev);
}
- md_update_sb(mddev);
+ md_update_sb(mddev, 1);
/* if array is no-longer degraded, then any saved_raid_disk
* information must be scrapped
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 1cc9de44ce86..e4f168d063db 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -253,7 +253,7 @@ static void multipath_error (mddev_t *mddev, mdk_rdev_t *rdev)
char b[BDEVNAME_SIZE];
clear_bit(In_sync, &rdev->flags);
set_bit(Faulty, &rdev->flags);
- mddev->sb_dirty = 1;
+ set_bit(MD_CHANGE_DEVS, &mddev->flags);
conf->working_disks--;
printk(KERN_ALERT "multipath: IO failure on %s,"
" disabling IO path. \n Operation continuing"
@@ -470,7 +470,6 @@ static int multipath_run (mddev_t *mddev)
}
conf->raid_disks = mddev->raid_disks;
- mddev->sb_dirty = 1;
conf->mddev = mddev;
spin_lock_init(&conf->device_lock);
INIT_LIST_HEAD(&conf->retry_list);
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 3b4d69c05623..2817c477302d 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -969,7 +969,7 @@ static void error(mddev_t *mddev, mdk_rdev_t *rdev)
}
clear_bit(In_sync, &rdev->flags);
set_bit(Faulty, &rdev->flags);
- mddev->sb_dirty = 1;
+ 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);
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 7bf5ce281c4d..85e3df2d268a 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -960,7 +960,7 @@ static void error(mddev_t *mddev, mdk_rdev_t *rdev)
}
clear_bit(In_sync, &rdev->flags);
set_bit(Faulty, &rdev->flags);
- mddev->sb_dirty = 1;
+ set_bit(MD_CHANGE_DEVS, &mddev->flags);
printk(KERN_ALERT "raid10: Disk failure on %s, disabling device. \n"
" Operation continuing on %d devices\n",
bdevname(rdev->bdev,b), conf->working_disks);
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 450066007160..d5a06b258427 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -696,7 +696,7 @@ static void error(mddev_t *mddev, mdk_rdev_t *rdev)
PRINTK("raid5: error called\n");
if (!test_bit(Faulty, &rdev->flags)) {
- mddev->sb_dirty = 1;
+ set_bit(MD_CHANGE_DEVS, &mddev->flags);
if (test_bit(In_sync, &rdev->flags)) {
conf->working_disks--;
mddev->degraded++;
@@ -2781,9 +2781,9 @@ static sector_t reshape_request(mddev_t *mddev, sector_t sector_nr, int *skipped
wait_event(conf->wait_for_overlap,
atomic_read(&conf->reshape_stripes)==0);
mddev->reshape_position = conf->expand_progress;
- mddev->sb_dirty = 1;
+ set_bit(MD_CHANGE_DEVS, &mddev->flags);
md_wakeup_thread(mddev->thread);
- wait_event(mddev->sb_wait, mddev->sb_dirty == 0 ||
+ wait_event(mddev->sb_wait, mddev->flags == 0 ||
kthread_should_stop());
spin_lock_irq(&conf->device_lock);
conf->expand_lo = mddev->reshape_position;
@@ -3605,7 +3605,7 @@ static int raid5_start_reshape(mddev_t *mddev)
mddev->degraded = (conf->raid_disks - conf->previous_raid_disks) - added_devices;
mddev->raid_disks = conf->raid_disks;
mddev->reshape_position = 0;
- mddev->sb_dirty = 1;
+ set_bit(MD_CHANGE_DEVS, &mddev->flags);
clear_bit(MD_RECOVERY_SYNC, &mddev->recovery);
clear_bit(MD_RECOVERY_CHECK, &mddev->recovery);
diff --git a/include/linux/raid/md.h b/include/linux/raid/md.h
index c588709acbbc..866a1e2b0ce0 100644
--- a/include/linux/raid/md.h
+++ b/include/linux/raid/md.h
@@ -95,7 +95,6 @@ extern int sync_page_io(struct block_device *bdev, sector_t sector, int size,
extern void md_do_sync(mddev_t *mddev);
extern void md_new_event(mddev_t *mddev);
-extern void md_update_sb(mddev_t * mddev);
#endif /* CONFIG_MD */
#endif
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index 920b94fe31fa..e423dad1a7fd 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -116,7 +116,11 @@ struct mddev_s
dev_t unit;
int md_minor;
struct list_head disks;
- int sb_dirty;
+ unsigned long flags;
+#define MD_CHANGE_DEVS 0 /* Some device status has changed */
+#define MD_CHANGE_CLEAN 1 /* transition to or from 'clean' */
+#define MD_CHANGE_PENDING 2 /* superblock update in progress */
+
int ro;
struct gendisk *gendisk;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.