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-rw-r--r--drivers/md/md-cluster.c2
-rw-r--r--drivers/md/md.c12
-rw-r--r--drivers/md/md.h4
-rw-r--r--drivers/md/raid5.c76
4 files changed, 52 insertions, 42 deletions
diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c
index 8e36a0feec09..139fe2019c1d 100644
--- a/drivers/md/md-cluster.c
+++ b/drivers/md/md-cluster.c
@@ -1570,7 +1570,7 @@ out:
return err;
}
-static struct md_cluster_operations cluster_ops = {
+static const struct md_cluster_operations cluster_ops = {
.join = join,
.leave = leave,
.slot_number = slot_number,
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 0ff26a547f1a..64693913ed18 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -85,7 +85,7 @@ static DEFINE_SPINLOCK(pers_lock);
static const struct kobj_type md_ktype;
-struct md_cluster_operations *md_cluster_ops;
+const struct md_cluster_operations *md_cluster_ops;
EXPORT_SYMBOL(md_cluster_ops);
static struct module *md_cluster_mod;
@@ -627,7 +627,7 @@ static void md_submit_flush_data(struct work_struct *ws)
* always is 0, make_request() will not be called here.
*/
if (WARN_ON_ONCE(!mddev->pers->make_request(mddev, bio)))
- bio_io_error(bio);;
+ bio_io_error(bio);
}
/* The pair is percpu_ref_get() from md_flush_request() */
@@ -7765,12 +7765,6 @@ static int md_ioctl(struct block_device *bdev, blk_mode_t mode,
return get_bitmap_file(mddev, argp);
}
- if (cmd == HOT_REMOVE_DISK)
- /* need to ensure recovery thread has run */
- wait_event_interruptible_timeout(mddev->sb_wait,
- !test_bit(MD_RECOVERY_NEEDED,
- &mddev->recovery),
- msecs_to_jiffies(5000));
if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) {
/* Need to flush page cache, and ensure no-one else opens
* and writes
@@ -8543,7 +8537,7 @@ int unregister_md_personality(struct md_personality *p)
}
EXPORT_SYMBOL(unregister_md_personality);
-int register_md_cluster_operations(struct md_cluster_operations *ops,
+int register_md_cluster_operations(const struct md_cluster_operations *ops,
struct module *module)
{
int ret = 0;
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 28cb4b0b6c17..a0d6827dced9 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -849,7 +849,7 @@ static inline void safe_put_page(struct page *p)
extern int register_md_personality(struct md_personality *p);
extern int unregister_md_personality(struct md_personality *p);
-extern int register_md_cluster_operations(struct md_cluster_operations *ops,
+extern int register_md_cluster_operations(const struct md_cluster_operations *ops,
struct module *module);
extern int unregister_md_cluster_operations(void);
extern int md_setup_cluster(struct mddev *mddev, int nodes);
@@ -932,7 +932,7 @@ static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev)
}
}
-extern struct md_cluster_operations *md_cluster_ops;
+extern const struct md_cluster_operations *md_cluster_ops;
static inline int mddev_is_clustered(struct mddev *mddev)
{
return mddev->cluster_info && mddev->bitmap_info.nodes > 1;
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 10219205160b..c14cf2410365 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -155,7 +155,7 @@ static int raid6_idx_to_slot(int idx, struct stripe_head *sh,
return slot;
}
-static void print_raid5_conf (struct r5conf *conf);
+static void print_raid5_conf(struct r5conf *conf);
static int stripe_operations_active(struct stripe_head *sh)
{
@@ -5899,6 +5899,39 @@ out:
return ret;
}
+enum reshape_loc {
+ LOC_NO_RESHAPE,
+ LOC_AHEAD_OF_RESHAPE,
+ LOC_INSIDE_RESHAPE,
+ LOC_BEHIND_RESHAPE,
+};
+
+static enum reshape_loc get_reshape_loc(struct mddev *mddev,
+ struct r5conf *conf, sector_t logical_sector)
+{
+ sector_t reshape_progress, reshape_safe;
+ /*
+ * Spinlock is needed as reshape_progress may be
+ * 64bit on a 32bit platform, and so it might be
+ * possible to see a half-updated value
+ * Of course reshape_progress could change after
+ * the lock is dropped, so once we get a reference
+ * to the stripe that we think it is, we will have
+ * to check again.
+ */
+ spin_lock_irq(&conf->device_lock);
+ reshape_progress = conf->reshape_progress;
+ reshape_safe = conf->reshape_safe;
+ spin_unlock_irq(&conf->device_lock);
+ if (reshape_progress == MaxSector)
+ return LOC_NO_RESHAPE;
+ if (ahead_of_reshape(mddev, logical_sector, reshape_progress))
+ return LOC_AHEAD_OF_RESHAPE;
+ if (ahead_of_reshape(mddev, logical_sector, reshape_safe))
+ return LOC_INSIDE_RESHAPE;
+ return LOC_BEHIND_RESHAPE;
+}
+
static enum stripe_result make_stripe_request(struct mddev *mddev,
struct r5conf *conf, struct stripe_request_ctx *ctx,
sector_t logical_sector, struct bio *bi)
@@ -5913,28 +5946,14 @@ static enum stripe_result make_stripe_request(struct mddev *mddev,
seq = read_seqcount_begin(&conf->gen_lock);
if (unlikely(conf->reshape_progress != MaxSector)) {
- /*
- * Spinlock is needed as reshape_progress may be
- * 64bit on a 32bit platform, and so it might be
- * possible to see a half-updated value
- * Of course reshape_progress could change after
- * the lock is dropped, so once we get a reference
- * to the stripe that we think it is, we will have
- * to check again.
- */
- spin_lock_irq(&conf->device_lock);
- if (ahead_of_reshape(mddev, logical_sector,
- conf->reshape_progress)) {
- previous = 1;
- } else {
- if (ahead_of_reshape(mddev, logical_sector,
- conf->reshape_safe)) {
- spin_unlock_irq(&conf->device_lock);
- ret = STRIPE_SCHEDULE_AND_RETRY;
- goto out;
- }
+ enum reshape_loc loc = get_reshape_loc(mddev, conf,
+ logical_sector);
+ if (loc == LOC_INSIDE_RESHAPE) {
+ ret = STRIPE_SCHEDULE_AND_RETRY;
+ goto out;
}
- spin_unlock_irq(&conf->device_lock);
+ if (loc == LOC_AHEAD_OF_RESHAPE)
+ previous = 1;
}
new_sector = raid5_compute_sector(conf, logical_sector, previous,
@@ -6112,8 +6131,7 @@ static bool raid5_make_request(struct mddev *mddev, struct bio * bi)
/* Bail out if conflicts with reshape and REQ_NOWAIT is set */
if ((bi->bi_opf & REQ_NOWAIT) &&
(conf->reshape_progress != MaxSector) &&
- !ahead_of_reshape(mddev, logical_sector, conf->reshape_progress) &&
- ahead_of_reshape(mddev, logical_sector, conf->reshape_safe)) {
+ get_reshape_loc(mddev, conf, logical_sector) == LOC_INSIDE_RESHAPE) {
bio_wouldblock_error(bi);
if (rw == WRITE)
md_write_end(mddev);
@@ -7568,11 +7586,11 @@ static struct r5conf *setup_conf(struct mddev *mddev)
if (test_bit(Replacement, &rdev->flags)) {
if (disk->replacement)
goto abort;
- RCU_INIT_POINTER(disk->replacement, rdev);
+ disk->replacement = rdev;
} else {
if (disk->rdev)
goto abort;
- RCU_INIT_POINTER(disk->rdev, rdev);
+ disk->rdev = rdev;
}
if (test_bit(In_sync, &rdev->flags)) {
@@ -8054,7 +8072,7 @@ static void raid5_status(struct seq_file *seq, struct mddev *mddev)
seq_printf (seq, "]");
}
-static void print_raid5_conf (struct r5conf *conf)
+static void print_raid5_conf(struct r5conf *conf)
{
struct md_rdev *rdev;
int i;
@@ -8068,15 +8086,13 @@ static void print_raid5_conf (struct r5conf *conf)
conf->raid_disks,
conf->raid_disks - conf->mddev->degraded);
- rcu_read_lock();
for (i = 0; i < conf->raid_disks; i++) {
- rdev = rcu_dereference(conf->disks[i].rdev);
+ rdev = conf->disks[i].rdev;
if (rdev)
pr_debug(" disk %d, o:%d, dev:%pg\n",
i, !test_bit(Faulty, &rdev->flags),
rdev->bdev);
}
- rcu_read_unlock();
}
static int raid5_spare_active(struct mddev *mddev)
generated by cgit v1.2.3 (git 2.46.0) at 2025-08-01 01:37:58 +0000