This makes it possible to test the error path in blk_mq_realloc_hw_ctxs() and also several error paths in null_blk. Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx> Cc: Ming Lei <ming.lei@xxxxxxxxxx> Cc: Hannes Reinecke <hare@xxxxxxxx> Cc: Johannes Thumshirn <jth@xxxxxxxxxx> Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx> --- drivers/block/null_blk_main.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c index d21c82c8863f..89bb16a99007 100644 --- a/drivers/block/null_blk_main.c +++ b/drivers/block/null_blk_main.c @@ -23,6 +23,7 @@ #ifdef CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION static DECLARE_FAULT_ATTR(null_timeout_attr); static DECLARE_FAULT_ATTR(null_requeue_attr); +static DECLARE_FAULT_ATTR(null_init_hctx_attr); #endif static inline u64 mb_per_tick(int mbps) @@ -101,6 +102,9 @@ module_param_string(timeout, g_timeout_str, sizeof(g_timeout_str), 0444); static char g_requeue_str[80]; module_param_string(requeue, g_requeue_str, sizeof(g_requeue_str), 0444); + +static char g_init_hctx_str[80]; +module_param_string(init_hctx, g_init_hctx_str, sizeof(g_init_hctx_str), 0444); #endif static int g_queue_mode = NULL_Q_MQ; @@ -1451,6 +1455,11 @@ static int null_init_hctx(struct blk_mq_hw_ctx *hctx, void *driver_data, struct nullb *nullb = hctx->queue->queuedata; struct nullb_queue *nq; +#ifdef CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION + if (g_init_hctx_str[0] && should_fail(&null_init_hctx_attr, 1)) + return -EFAULT; +#endif + nq = &nullb->queues[hctx_idx]; hctx->driver_data = nq; null_init_queue(nullb, nq); @@ -1683,6 +1692,8 @@ static bool null_setup_fault(void) return false; if (!__null_setup_fault(&null_requeue_attr, g_requeue_str)) return false; + if (!__null_setup_fault(&null_init_hctx_attr, g_init_hctx_str)) + return false; #endif return true; }
