diff options
Diffstat (limited to 'include/linux/blk-mq.h')
| -rw-r--r-- | include/linux/blk-mq.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 2a5a828f19a0..b25d12545f46 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -507,6 +507,8 @@ enum hctx_type { * request_queue.tag_set_list. * @srcu: Use as lock when type of the request queue is blocking * (BLK_MQ_F_BLOCKING). + * @tags_srcu: SRCU used to defer freeing of tags page_list to prevent + * use-after-free when iterating tags. * @update_nr_hwq_lock: * Synchronize updating nr_hw_queues with add/del disk & * switching elevator. @@ -531,6 +533,7 @@ struct blk_mq_tag_set { struct mutex tag_list_lock; struct list_head tag_list; struct srcu_struct *srcu; + struct srcu_struct tags_srcu; struct rw_semaphore update_nr_hwq_lock; }; @@ -767,6 +770,7 @@ struct blk_mq_tags { * request pool */ spinlock_t lock; + struct rcu_head rcu_head; }; static inline struct request *blk_mq_tag_to_rq(struct blk_mq_tags *tags, |