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block-5.13-2021-05-22

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Merge tag 'block-5.13-2021-05-22' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - Fix BLKRRPART and deletion race (Gulam, Christoph)

 - NVMe pull request (Christoph):
      - nvme-tcp corruption and timeout fixes (Sagi Grimberg, Keith
        Busch)
      - nvme-fc teardown fix (James Smart)
      - nvmet/nvme-loop memory leak fixes (Wu Bo)"

* tag 'block-5.13-2021-05-22' of git://git.kernel.dk/linux-block:
  block: fix a race between del_gendisk and BLKRRPART
  block: prevent block device lookups at the beginning of del_gendisk
  nvme-fc: clear q_live at beginning of association teardown
  nvme-tcp: rerun io_work if req_list is not empty
  nvme-tcp: fix possible use-after-completion
  nvme-loop: fix memory leak in nvme_loop_create_ctrl()
  nvmet: fix memory leak in nvmet_alloc_ctrl()
This commit is contained in:
Linus Torvalds 2021-05-22 07:40:34 -10:00
commit 4ff2473bdb
7 changed files with 28 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
block/genhd.c
View File

@ -29,8 +29,6 @@
static struct kobject *block_depr;
DECLARE_RWSEM(bdev_lookup_sem);
/* for extended dynamic devt allocation, currently only one major is used */
#define NR_EXT_DEVT (1 << MINORBITS)
static DEFINE_IDA(ext_devt_ida);
@ -609,13 +607,8 @@ void del_gendisk(struct gendisk *disk)
blk_integrity_del(disk);
disk_del_events(disk);
/*
* Block lookups of the disk until all bdevs are unhashed and the
* disk is marked as dead (GENHD_FL_UP cleared).
*/
down_write(&bdev_lookup_sem);
mutex_lock(&disk->part0->bd_mutex);
disk->flags &= ~GENHD_FL_UP;
blk_drop_partitions(disk);
mutex_unlock(&disk->part0->bd_mutex);
@ -629,8 +622,6 @@ void del_gendisk(struct gendisk *disk)
remove_inode_hash(disk->part0->bd_inode);
set_capacity(disk, 0);
disk->flags &= ~GENHD_FL_UP;
up_write(&bdev_lookup_sem);
if (!(disk->flags & GENHD_FL_HIDDEN)) {
sysfs_remove_link(&disk_to_dev(disk)->kobj, "bdi");

12
drivers/nvme/host/fc.c
View File

@ -2461,6 +2461,18 @@ nvme_fc_terminate_exchange(struct request *req, void *data, bool reserved)
static void
__nvme_fc_abort_outstanding_ios(struct nvme_fc_ctrl *ctrl, bool start_queues)
{
int q;
/*
* if aborting io, the queues are no longer good, mark them
* all as not live.
*/
if (ctrl->ctrl.queue_count > 1) {
for (q = 1; q < ctrl->ctrl.queue_count; q++)
clear_bit(NVME_FC_Q_LIVE, &ctrl->queues[q].flags);
}
clear_bit(NVME_FC_Q_LIVE, &ctrl->queues[0].flags);
/*
* If io queues are present, stop them and terminate all outstanding
* ios on them. As FC allocates FC exchange for each io, the

5
drivers/nvme/host/tcp.c
View File

@ -943,7 +943,6 @@ static int nvme_tcp_try_send_data(struct nvme_tcp_request *req)
if (ret <= 0)
return ret;
nvme_tcp_advance_req(req, ret);
if (queue->data_digest)
nvme_tcp_ddgst_update(queue->snd_hash, page,
offset, ret);
@ -960,6 +959,7 @@ static int nvme_tcp_try_send_data(struct nvme_tcp_request *req)
}
return 1;
}
nvme_tcp_advance_req(req, ret);
}
return -EAGAIN;
}
@ -1140,7 +1140,8 @@ static void nvme_tcp_io_work(struct work_struct *w)
pending = true;
else if (unlikely(result < 0))
break;
}
} else
pending = !llist_empty(&queue->req_list);
result = nvme_tcp_try_recv(queue);
if (result > 0)

2
drivers/nvme/target/core.c
View File

@ -1372,7 +1372,7 @@ u16 nvmet_alloc_ctrl(const char *subsysnqn, const char *hostnqn,
goto out_free_changed_ns_list;
if (subsys->cntlid_min > subsys->cntlid_max)
goto out_free_changed_ns_list;
goto out_free_sqs;
ret = ida_simple_get(&cntlid_ida,
subsys->cntlid_min, subsys->cntlid_max,

4
drivers/nvme/target/loop.c
View File

@ -590,8 +590,10 @@ static struct nvme_ctrl *nvme_loop_create_ctrl(struct device *dev,
ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_loop_ctrl_ops,
0 /* no quirks, we're perfect! */);
if (ret)
if (ret) {
kfree(ctrl);
goto out;
}
if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING))
WARN_ON_ONCE(1);

18
fs/block_dev.c
View File

@ -1244,6 +1244,9 @@ int bdev_disk_changed(struct block_device *bdev, bool invalidate)
lockdep_assert_held(&bdev->bd_mutex);
if (!(disk->flags & GENHD_FL_UP))
return -ENXIO;
rescan:
if (bdev->bd_part_count)
return -EBUSY;
@ -1298,6 +1301,9 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode)
struct gendisk *disk = bdev->bd_disk;
int ret = 0;
if (!(disk->flags & GENHD_FL_UP))
return -ENXIO;
if (!bdev->bd_openers) {
if (!bdev_is_partition(bdev)) {
ret = 0;
@ -1332,8 +1338,7 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode)
whole->bd_part_count++;
mutex_unlock(&whole->bd_mutex);
if (!(disk->flags & GENHD_FL_UP) ||
!bdev_nr_sectors(bdev)) {
if (!bdev_nr_sectors(bdev)) {
__blkdev_put(whole, mode, 1);
bdput(whole);
return -ENXIO;
@ -1364,16 +1369,12 @@ struct block_device *blkdev_get_no_open(dev_t dev)
struct block_device *bdev;
struct gendisk *disk;
down_read(&bdev_lookup_sem);
bdev = bdget(dev);
if (!bdev) {
up_read(&bdev_lookup_sem);
blk_request_module(dev);
down_read(&bdev_lookup_sem);
bdev = bdget(dev);
if (!bdev)
goto unlock;
return NULL;
}
disk = bdev->bd_disk;
@ -1383,14 +1384,11 @@ struct block_device *blkdev_get_no_open(dev_t dev)
goto put_disk;
if (!try_module_get(bdev->bd_disk->fops->owner))
goto put_disk;
up_read(&bdev_lookup_sem);
return bdev;
put_disk:
put_disk(disk);
bdput:
bdput(bdev);
unlock:
up_read(&bdev_lookup_sem);
return NULL;
}

2
include/linux/genhd.h
View File

@ -306,8 +306,6 @@ static inline void bd_unlink_disk_holder(struct block_device *bdev,
}
#endif /* CONFIG_SYSFS */
extern struct rw_semaphore bdev_lookup_sem;
dev_t blk_lookup_devt(const char *name, int partno);
void blk_request_module(dev_t devt);
#ifdef CONFIG_BLOCK