Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm
* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm:
dm: sysfs revert add empty release function to avoid debug warning
dm mpath: fix stall when requeueing io
dm raid1: fix null pointer dereference in suspend
dm raid1: fail writes if errors are not handled and log fails
dm log: userspace fix overhead_size calcuations
dm snapshot: persistent annotate work_queue as on stack
dm stripe: avoid divide by zero with invalid stripe count
diff --git a/drivers/md/dm-log-userspace-transfer.c b/drivers/md/dm-log-userspace-transfer.c
index 54abf9e..f1c8cae 100644
--- a/drivers/md/dm-log-userspace-transfer.c
+++ b/drivers/md/dm-log-userspace-transfer.c
@@ -172,11 +172,15 @@
{
int r = 0;
size_t dummy = 0;
- int overhead_size =
- sizeof(struct dm_ulog_request *) + sizeof(struct cn_msg);
+ int overhead_size = sizeof(struct dm_ulog_request) + sizeof(struct cn_msg);
struct dm_ulog_request *tfr = prealloced_ulog_tfr;
struct receiving_pkg pkg;
+ /*
+ * Given the space needed to hold the 'struct cn_msg' and
+ * 'struct dm_ulog_request' - do we have enough payload
+ * space remaining?
+ */
if (data_size > (DM_ULOG_PREALLOCED_SIZE - overhead_size)) {
DMINFO("Size of tfr exceeds preallocated size");
return -EINVAL;
@@ -191,7 +195,7 @@
*/
mutex_lock(&dm_ulog_lock);
- memset(tfr, 0, DM_ULOG_PREALLOCED_SIZE - overhead_size);
+ memset(tfr, 0, DM_ULOG_PREALLOCED_SIZE - sizeof(struct cn_msg));
memcpy(tfr->uuid, uuid, DM_UUID_LEN);
tfr->luid = luid;
tfr->seq = dm_ulog_seq++;
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index ad779bd..6c1046d 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -724,7 +724,7 @@
/*
* Dispatch io.
*/
- if (unlikely(ms->log_failure)) {
+ if (unlikely(ms->log_failure) && errors_handled(ms)) {
spin_lock_irq(&ms->lock);
bio_list_merge(&ms->failures, &sync);
spin_unlock_irq(&ms->lock);
diff --git a/drivers/md/dm-region-hash.c b/drivers/md/dm-region-hash.c
index 5f19ceb..168bd38 100644
--- a/drivers/md/dm-region-hash.c
+++ b/drivers/md/dm-region-hash.c
@@ -660,10 +660,9 @@
spin_lock_irq(&rh->region_lock);
if (success)
list_add(®->list, ®->rh->recovered_regions);
- else {
- reg->state = DM_RH_NOSYNC;
+ else
list_add(®->list, ®->rh->failed_recovered_regions);
- }
+
spin_unlock_irq(&rh->region_lock);
rh->wakeup_workers(rh->context);
diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c
index 7d08879..c097d8a 100644
--- a/drivers/md/dm-snap-persistent.c
+++ b/drivers/md/dm-snap-persistent.c
@@ -254,7 +254,7 @@
* Issue the synchronous I/O from a different thread
* to avoid generic_make_request recursion.
*/
- INIT_WORK(&req.work, do_metadata);
+ INIT_WORK_ON_STACK(&req.work, do_metadata);
queue_work(ps->metadata_wq, &req.work);
flush_workqueue(ps->metadata_wq);
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c
index e0efc1a..bd58703 100644
--- a/drivers/md/dm-stripe.c
+++ b/drivers/md/dm-stripe.c
@@ -110,7 +110,7 @@
}
stripes = simple_strtoul(argv[0], &end, 10);
- if (*end) {
+ if (!stripes || *end) {
ti->error = "Invalid stripe count";
return -EINVAL;
}
diff --git a/drivers/md/dm-sysfs.c b/drivers/md/dm-sysfs.c
index f53392d..f91b409 100644
--- a/drivers/md/dm-sysfs.c
+++ b/drivers/md/dm-sysfs.c
@@ -80,20 +80,12 @@
};
/*
- * The sysfs structure is embedded in md struct, nothing to do here
- */
-static void dm_sysfs_release(struct kobject *kobj)
-{
-}
-
-/*
* dm kobject is embedded in mapped_device structure
* no need to define release function here
*/
static struct kobj_type dm_ktype = {
.sysfs_ops = &dm_sysfs_ops,
.default_attrs = dm_attrs,
- .release = dm_sysfs_release
};
/*
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 3167480..aa4e2aa 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1595,10 +1595,15 @@
return BLKPREP_OK;
}
-static void map_request(struct dm_target *ti, struct request *clone,
- struct mapped_device *md)
+/*
+ * Returns:
+ * 0 : the request has been processed (not requeued)
+ * !0 : the request has been requeued
+ */
+static int map_request(struct dm_target *ti, struct request *clone,
+ struct mapped_device *md)
{
- int r;
+ int r, requeued = 0;
struct dm_rq_target_io *tio = clone->end_io_data;
/*
@@ -1625,6 +1630,7 @@
case DM_MAPIO_REQUEUE:
/* The target wants to requeue the I/O */
dm_requeue_unmapped_request(clone);
+ requeued = 1;
break;
default:
if (r > 0) {
@@ -1636,6 +1642,8 @@
dm_kill_unmapped_request(clone, r);
break;
}
+
+ return requeued;
}
/*
@@ -1677,12 +1685,17 @@
atomic_inc(&md->pending[rq_data_dir(clone)]);
spin_unlock(q->queue_lock);
- map_request(ti, clone, md);
+ if (map_request(ti, clone, md))
+ goto requeued;
+
spin_lock_irq(q->queue_lock);
}
goto out;
+requeued:
+ spin_lock_irq(q->queue_lock);
+
plug_and_out:
if (!elv_queue_empty(q))
/* Some requests still remain, retry later */