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block-6.1-2022-10-20

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Merge tag 'block-6.1-2022-10-20' of git://git.kernel.dk/linux

Pull block fixes from Jens Axboe:

 - NVMe pull request via Christoph:
      - fix nvme-hwmon for DMA non-cohehrent architectures (Serge Semin)
      - add a nvme-hwmong maintainer (Christoph Hellwig)
      - fix error pointer dereference in error handling (Dan Carpenter)
      - fix invalid memory reference in nvmet_subsys_attr_qid_max_show
        (Daniel Wagner)
      - don't limit the DMA segment size in nvme-apple (Russell King)
      - fix workqueue MEM_RECLAIM flushing dependency (Sagi Grimberg)
      - disable write zeroes on various Kingston SSDs (Xander Li)

 - fix a memory leak with block device tracing (Ye)

 - flexible-array fix for ublk (Yushan)

 - document the ublk recovery feature from this merge window
   (ZiyangZhang)

 - remove dead bfq variable in struct (Yuwei)

 - error handling rq clearing fix (Yu)

 - add an IRQ safety check for the cached bio freeing (Pavel)

 - drbd bio cloning fix (Christoph)

* tag 'block-6.1-2022-10-20' of git://git.kernel.dk/linux:
  blktrace: remove unnessary stop block trace in 'blk_trace_shutdown'
  blktrace: fix possible memleak in '__blk_trace_remove'
  blktrace: introduce 'blk_trace_{start,stop}' helper
  bio: safeguard REQ_ALLOC_CACHE bio put
  block, bfq: remove unused variable for bfq_queue
  drbd: only clone bio if we have a backing device
  ublk_drv: use flexible-array member instead of zero-length array
  nvmet: fix invalid memory reference in nvmet_subsys_attr_qid_max_show
  nvmet: fix workqueue MEM_RECLAIM flushing dependency
  nvme-hwmon: kmalloc the NVME SMART log buffer
  nvme-hwmon: consistently ignore errors from nvme_hwmon_init
  nvme: add Guenther as nvme-hwmon maintainer
  nvme-apple: don't limit DMA segement size
  nvme-pci: disable write zeroes on various Kingston SSD
  nvme: fix error pointer dereference in error handling
  Documentation: document ublk user recovery feature
  blk-mq: fix null pointer dereference in blk_mq_clear_rq_mapping()
This commit is contained in:
Linus Torvalds 2022-10-21 15:14:14 -07:00
commit d4b7332eef
14 changed files with 135 additions and 76 deletions
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82
kernel/trace/blktrace.c
View file

@ -346,8 +346,40 @@ static void put_probe_ref(void)
mutex_unlock(&blk_probe_mutex);
}
static int blk_trace_start(struct blk_trace *bt)
{
if (bt->trace_state != Blktrace_setup &&
bt->trace_state != Blktrace_stopped)
return -EINVAL;
blktrace_seq++;
smp_mb();
bt->trace_state = Blktrace_running;
raw_spin_lock_irq(&running_trace_lock);
list_add(&bt->running_list, &running_trace_list);
raw_spin_unlock_irq(&running_trace_lock);
trace_note_time(bt);
return 0;
}
static int blk_trace_stop(struct blk_trace *bt)
{
if (bt->trace_state != Blktrace_running)
return -EINVAL;
bt->trace_state = Blktrace_stopped;
raw_spin_lock_irq(&running_trace_lock);
list_del_init(&bt->running_list);
raw_spin_unlock_irq(&running_trace_lock);
relay_flush(bt->rchan);
return 0;
}
static void blk_trace_cleanup(struct request_queue *q, struct blk_trace *bt)
{
blk_trace_stop(bt);
synchronize_rcu();
blk_trace_free(q, bt);
put_probe_ref();
@ -362,8 +394,7 @@ static int __blk_trace_remove(struct request_queue *q)
if (!bt)
return -EINVAL;
if (bt->trace_state != Blktrace_running)
blk_trace_cleanup(q, bt);
blk_trace_cleanup(q, bt);
return 0;
}
@ -658,7 +689,6 @@ static int compat_blk_trace_setup(struct request_queue *q, char *name,
static int __blk_trace_startstop(struct request_queue *q, int start)
{
int ret;
struct blk_trace *bt;
bt = rcu_dereference_protected(q->blk_trace,
@ -666,36 +696,10 @@ static int __blk_trace_startstop(struct request_queue *q, int start)
if (bt == NULL)
return -EINVAL;
/*
* For starting a trace, we can transition from a setup or stopped
* trace. For stopping a trace, the state must be running
*/
ret = -EINVAL;
if (start) {
if (bt->trace_state == Blktrace_setup ||
bt->trace_state == Blktrace_stopped) {
blktrace_seq++;
smp_mb();
bt->trace_state = Blktrace_running;
raw_spin_lock_irq(&running_trace_lock);
list_add(&bt->running_list, &running_trace_list);
raw_spin_unlock_irq(&running_trace_lock);
trace_note_time(bt);
ret = 0;
}
} else {
if (bt->trace_state == Blktrace_running) {
bt->trace_state = Blktrace_stopped;
raw_spin_lock_irq(&running_trace_lock);
list_del_init(&bt->running_list);
raw_spin_unlock_irq(&running_trace_lock);
relay_flush(bt->rchan);
ret = 0;
}
}
return ret;
if (start)
return blk_trace_start(bt);
else
return blk_trace_stop(bt);
}
int blk_trace_startstop(struct request_queue *q, int start)
@ -772,10 +776,8 @@ int blk_trace_ioctl(struct block_device *bdev, unsigned cmd, char __user *arg)
void blk_trace_shutdown(struct request_queue *q)
{
if (rcu_dereference_protected(q->blk_trace,
lockdep_is_held(&q->debugfs_mutex))) {
__blk_trace_startstop(q, 0);
lockdep_is_held(&q->debugfs_mutex)))
__blk_trace_remove(q);
}
}
#ifdef CONFIG_BLK_CGROUP
@ -1614,13 +1616,7 @@ static int blk_trace_remove_queue(struct request_queue *q)
if (bt == NULL)
return -EINVAL;
if (bt->trace_state == Blktrace_running) {
bt->trace_state = Blktrace_stopped;
raw_spin_lock_irq(&running_trace_lock);
list_del_init(&bt->running_list);
raw_spin_unlock_irq(&running_trace_lock);
relay_flush(bt->rchan);
}
blk_trace_stop(bt);
put_probe_ref();
synchronize_rcu();