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authorLinus Torvalds <torvalds@linux-foundation.org>2020-09-04 22:04:51 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2020-09-04 22:04:51 +0200
commit8075fc3b113dee1531106aaec3dfa19c8158374d (patch)
treec168243d0785bade241bcb223ddfd07418164cfb /block
parentMerge tag 'io_uring-5.9-2020-09-04' of git://git.kernel.dk/linux-block (diff)
parentblock: allow for_each_bvec to support zero len bvec (diff)
downloadlinux-8075fc3b113dee1531106aaec3dfa19c8158374d.tar.xz
linux-8075fc3b113dee1531106aaec3dfa19c8158374d.zip
Merge tag 'block-5.9-2020-09-04' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe: "A bit larger than usual this week, mostly due to the NVMe fixes arriving late for -rc3 and hence didn't make last weeks pull request. - NVMe: - instance leak and io boundary fixes from Keith - fc locking fix from Christophe - various tcp/rdma reset during traffic fixes from Sagi - pci use-after-free fix from Tong - tcp target null deref fix from Ziye - Locking fix for partition removal (Christoph) - Ensure bdi->io_pages is always set (me) - Fixup for hd struct reference (Ming) - Fix for zero length bvecs (Ming) - Two small blk-iocost fixes (Tejun)" * tag 'block-5.9-2020-09-04' of git://git.kernel.dk/linux-block: block: allow for_each_bvec to support zero len bvec blk-stat: make q->stats->lock irqsafe blk-iocost: ioc_pd_free() shouldn't assume irq disabled block: fix locking in bdev_del_partition block: release disk reference in hd_struct_free_work block: ensure bdi->io_pages is always initialized nvme-pci: cancel nvme device request before disabling nvme: only use power of two io boundaries nvme: fix controller instance leak nvmet-fc: Fix a missed _irqsave version of spin_lock in 'nvmet_fc_fod_op_done()' nvme: Fix NULL dereference for pci nvme controllers nvme-rdma: fix reset hang if controller died in the middle of a reset nvme-rdma: fix timeout handler nvme-rdma: serialize controller teardown sequences nvme-tcp: fix reset hang if controller died in the middle of a reset nvme-tcp: fix timeout handler nvme-tcp: serialize controller teardown sequences nvme: have nvme_wait_freeze_timeout return if it timed out nvme-fabrics: don't check state NVME_CTRL_NEW for request acceptance nvmet-tcp: Fix NULL dereference when a connect data comes in h2cdata pdu
Diffstat (limited to 'block')
-rw-r--r--block/blk-core.c1
-rw-r--r--block/blk-iocost.c5
-rw-r--r--block/blk-stat.c17
-rw-r--r--block/partitions/core.c37
4 files changed, 37 insertions, 23 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index d9d632639bd1..10c08ac50697 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -539,6 +539,7 @@ struct request_queue *blk_alloc_queue(int node_id)
goto fail_stats;
q->backing_dev_info->ra_pages = VM_READAHEAD_PAGES;
+ q->backing_dev_info->io_pages = VM_READAHEAD_PAGES;
q->backing_dev_info->capabilities = BDI_CAP_CGROUP_WRITEBACK;
q->node = node_id;
diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 413e0b5c8e6b..d37b55db2409 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -2092,14 +2092,15 @@ static void ioc_pd_free(struct blkg_policy_data *pd)
{
struct ioc_gq *iocg = pd_to_iocg(pd);
struct ioc *ioc = iocg->ioc;
+ unsigned long flags;
if (ioc) {
- spin_lock(&ioc->lock);
+ spin_lock_irqsave(&ioc->lock, flags);
if (!list_empty(&iocg->active_list)) {
propagate_active_weight(iocg, 0, 0);
list_del_init(&iocg->active_list);
}
- spin_unlock(&ioc->lock);
+ spin_unlock_irqrestore(&ioc->lock, flags);
hrtimer_cancel(&iocg->waitq_timer);
hrtimer_cancel(&iocg->delay_timer);
diff --git a/block/blk-stat.c b/block/blk-stat.c
index 7da302ff88d0..ae3dd1fb8e61 100644
--- a/block/blk-stat.c
+++ b/block/blk-stat.c
@@ -137,6 +137,7 @@ void blk_stat_add_callback(struct request_queue *q,
struct blk_stat_callback *cb)
{
unsigned int bucket;
+ unsigned long flags;
int cpu;
for_each_possible_cpu(cpu) {
@@ -147,20 +148,22 @@ void blk_stat_add_callback(struct request_queue *q,
blk_rq_stat_init(&cpu_stat[bucket]);
}
- spin_lock(&q->stats->lock);
+ spin_lock_irqsave(&q->stats->lock, flags);
list_add_tail_rcu(&cb->list, &q->stats->callbacks);
blk_queue_flag_set(QUEUE_FLAG_STATS, q);
- spin_unlock(&q->stats->lock);
+ spin_unlock_irqrestore(&q->stats->lock, flags);
}
void blk_stat_remove_callback(struct request_queue *q,
struct blk_stat_callback *cb)
{
- spin_lock(&q->stats->lock);
+ unsigned long flags;
+
+ spin_lock_irqsave(&q->stats->lock, flags);
list_del_rcu(&cb->list);
if (list_empty(&q->stats->callbacks) && !q->stats->enable_accounting)
blk_queue_flag_clear(QUEUE_FLAG_STATS, q);
- spin_unlock(&q->stats->lock);
+ spin_unlock_irqrestore(&q->stats->lock, flags);
del_timer_sync(&cb->timer);
}
@@ -183,10 +186,12 @@ void blk_stat_free_callback(struct blk_stat_callback *cb)
void blk_stat_enable_accounting(struct request_queue *q)
{
- spin_lock(&q->stats->lock);
+ unsigned long flags;
+
+ spin_lock_irqsave(&q->stats->lock, flags);
q->stats->enable_accounting = true;
blk_queue_flag_set(QUEUE_FLAG_STATS, q);
- spin_unlock(&q->stats->lock);
+ spin_unlock_irqrestore(&q->stats->lock, flags);
}
EXPORT_SYMBOL_GPL(blk_stat_enable_accounting);
diff --git a/block/partitions/core.c b/block/partitions/core.c
index e62a98a8eeb7..5b4869c08fb3 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -278,6 +278,15 @@ static void hd_struct_free_work(struct work_struct *work)
{
struct hd_struct *part =
container_of(to_rcu_work(work), struct hd_struct, rcu_work);
+ struct gendisk *disk = part_to_disk(part);
+
+ /*
+ * Release the disk reference acquired in delete_partition here.
+ * We can't release it in hd_struct_free because the final put_device
+ * needs process context and thus can't be run directly from a
+ * percpu_ref ->release handler.
+ */
+ put_device(disk_to_dev(disk));
part->start_sect = 0;
part->nr_sects = 0;
@@ -293,7 +302,6 @@ static void hd_struct_free(struct percpu_ref *ref)
rcu_dereference_protected(disk->part_tbl, 1);
rcu_assign_pointer(ptbl->last_lookup, NULL);
- put_device(disk_to_dev(disk));
INIT_RCU_WORK(&part->rcu_work, hd_struct_free_work);
queue_rcu_work(system_wq, &part->rcu_work);
@@ -524,19 +532,20 @@ int bdev_add_partition(struct block_device *bdev, int partno,
int bdev_del_partition(struct block_device *bdev, int partno)
{
struct block_device *bdevp;
- struct hd_struct *part;
- int ret = 0;
+ struct hd_struct *part = NULL;
+ int ret;
- part = disk_get_part(bdev->bd_disk, partno);
- if (!part)
- return -ENXIO;
-
- ret = -ENOMEM;
- bdevp = bdget(part_devt(part));
+ bdevp = bdget_disk(bdev->bd_disk, partno);
if (!bdevp)
- goto out_put_part;
+ return -ENOMEM;
mutex_lock(&bdevp->bd_mutex);
+ mutex_lock_nested(&bdev->bd_mutex, 1);
+
+ ret = -ENXIO;
+ part = disk_get_part(bdev->bd_disk, partno);
+ if (!part)
+ goto out_unlock;
ret = -EBUSY;
if (bdevp->bd_openers)
@@ -545,16 +554,14 @@ int bdev_del_partition(struct block_device *bdev, int partno)
sync_blockdev(bdevp);
invalidate_bdev(bdevp);
- mutex_lock_nested(&bdev->bd_mutex, 1);
delete_partition(bdev->bd_disk, part);
- mutex_unlock(&bdev->bd_mutex);
-
ret = 0;
out_unlock:
+ mutex_unlock(&bdev->bd_mutex);
mutex_unlock(&bdevp->bd_mutex);
bdput(bdevp);
-out_put_part:
- disk_put_part(part);
+ if (part)
+ disk_put_part(part);
return ret;
}