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| author |   Bart Van Assche <bvanassche@acm.org> | 2020-03-09 21:26:23 -0700 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2020-03-10 07:09:59 -0600 |
| commit | 596444e7570587867924c3ab025183b1a8726897 (patch) | |
| tree | ef51b84af05c982be1f4b8349f4a87a18ef9086d /drivers/block/null_blk_main.c | |
| parent | null_blk: Handle null_add_dev() failures properly (diff) | |
| download | linux-dev-596444e7570587867924c3ab025183b1a8726897.tar.xz linux-dev-596444e7570587867924c3ab025183b1a8726897.zip | |
null_blk: Add support for init_hctx() fault injection
This makes it possible to test the error path in blk_mq_realloc_hw_ctxs()
and also several error paths in null_blk.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Johannes Thumshirn <jth@kernel.org>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/null_blk_main.c')
| -rw-r--r-- | drivers/block/null_blk_main.c | 11 |
1 files changed, 11 insertions, 0 deletions
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; } |