From af2814149883e2c1851866ea2afcd8eadc040f79 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig <hch@lst.de> Date: Mon, 17 Jun 2024 08:04:38 +0200 Subject: block: freeze the queue in queue_attr_store queue_attr_store updates attributes used to control generating I/O, and can cause malformed bios if changed with I/O in flight. Freeze the queue in common code instead of adding it to almost every attribute. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Link: https://lore.kernel.org/r/20240617060532.127975-12-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk> --- block/blk-sysfs.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) (limited to 'block/blk-sysfs.c') diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index f0f9314ab65c..5c787965b7d0 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -189,12 +189,9 @@ static ssize_t queue_discard_max_store(struct request_queue *q, if ((max_discard_bytes >> SECTOR_SHIFT) > UINT_MAX) return -EINVAL; - blk_mq_freeze_queue(q); lim = queue_limits_start_update(q); lim.max_user_discard_sectors = max_discard_bytes >> SECTOR_SHIFT; err = queue_limits_commit_update(q, &lim); - blk_mq_unfreeze_queue(q); - if (err) return err; return ret; @@ -241,11 +238,9 @@ queue_max_sectors_store(struct request_queue *q, const char *page, size_t count) if (ret < 0) return ret; - blk_mq_freeze_queue(q); lim = queue_limits_start_update(q); lim.max_user_sectors = max_sectors_kb << 1; err = queue_limits_commit_update(q, &lim); - blk_mq_unfreeze_queue(q); if (err) return err; return ret; @@ -585,13 +580,11 @@ static ssize_t queue_wb_lat_store(struct request_queue *q, const char *page, * ends up either enabling or disabling wbt completely. We can't * have IO inflight if that happens. */ - blk_mq_freeze_queue(q); blk_mq_quiesce_queue(q); wbt_set_min_lat(q, val); blk_mq_unquiesce_queue(q); - blk_mq_unfreeze_queue(q); return count; } @@ -722,9 +715,11 @@ queue_attr_store(struct kobject *kobj, struct attribute *attr, if (!entry->store) return -EIO; + blk_mq_freeze_queue(q); mutex_lock(&q->sysfs_lock); res = entry->store(q, page, length); mutex_unlock(&q->sysfs_lock); + blk_mq_unfreeze_queue(q); return res; } -- cgit