mirror of https://gitee.com/openkylin/linux.git
scsi: scsi_debug: add cmd abort option to every_nth
This patch is motivated by a response in the thread: Re: [PATCH 0/5]stop normal completion path entering a timeout req by Jianchao Wang . It generalizes the error injection of blk_abort_request() to use scsi_debug's "every_nth" mechanism. Ref with original patch to scsi_debug: https://lore.kernel.org/lkml/a68ad043-26a1-d3d8-2009-504ba4230e0f@oracle.com/ Also convert two vmalloc/memset(0) to vzalloc() calls. Signed-off-by: Douglas Gilbert <dgilbert@interlog.com> Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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@ -164,29 +164,29 @@ static const char *sdebug_version_date = "20180128";
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#define SDEBUG_OPT_RESET_NOISE 0x2000
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#define SDEBUG_OPT_NO_CDB_NOISE 0x4000
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#define SDEBUG_OPT_HOST_BUSY 0x8000
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#define SDEBUG_OPT_CMD_ABORT 0x10000
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#define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
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SDEBUG_OPT_RESET_NOISE)
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#define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
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SDEBUG_OPT_TRANSPORT_ERR | \
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SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
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SDEBUG_OPT_SHORT_TRANSFER | \
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SDEBUG_OPT_HOST_BUSY)
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SDEBUG_OPT_HOST_BUSY | \
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SDEBUG_OPT_CMD_ABORT)
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/* When "every_nth" > 0 then modulo "every_nth" commands:
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* - a missing response is simulated if SDEBUG_OPT_TIMEOUT is set
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* - a RECOVERED_ERROR is simulated on successful read and write
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* commands if SDEBUG_OPT_RECOVERED_ERR is set.
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* - a TRANSPORT_ERROR is simulated on successful read and write
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* commands if SDEBUG_OPT_TRANSPORT_ERR is set.
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* - similarly for DIF_ERR, DIX_ERR, SHORT_TRANSFER, HOST_BUSY and
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* CMD_ABORT
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*
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* When "every_nth" < 0 then after "- every_nth" commands:
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* - a missing response is simulated if SDEBUG_OPT_TIMEOUT is set
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* - a RECOVERED_ERROR is simulated on successful read and write
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* commands if SDEBUG_OPT_RECOVERED_ERR is set.
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* - a TRANSPORT_ERROR is simulated on successful read and write
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* commands if _DEBUG_OPT_TRANSPORT_ERR is set.
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* This will continue on every subsequent command until some other action
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* occurs (e.g. the user * writing a new value (other than -1 or 1) to
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* every_nth via sysfs).
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* When "every_nth" < 0 then after "- every_nth" commands the selected
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* error will be injected. The error will be injected on every subsequent
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* command until some other action occurs; for example, the user writing
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* a new value (other than -1 or 1) to every_nth:
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* echo 0 > /sys/bus/pseudo/drivers/scsi_debug/every_nth
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*/
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/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
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@ -281,6 +281,7 @@ struct sdebug_defer {
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int issuing_cpu;
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bool init_hrt;
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bool init_wq;
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bool aborted; /* true when blk_abort_request() already called */
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enum sdeb_defer_type defer_t;
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};
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@ -296,6 +297,7 @@ struct sdebug_queued_cmd {
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unsigned int inj_dix:1;
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unsigned int inj_short:1;
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unsigned int inj_host_busy:1;
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unsigned int inj_cmd_abort:1;
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};
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struct sdebug_queue {
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@ -3792,6 +3794,7 @@ static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd)
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/* Queued (deferred) command completions converge here. */
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static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
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{
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bool aborted = sd_dp->aborted;
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int qc_idx;
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int retiring = 0;
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unsigned long iflags;
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@ -3801,6 +3804,8 @@ static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
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struct sdebug_dev_info *devip;
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sd_dp->defer_t = SDEB_DEFER_NONE;
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if (unlikely(aborted))
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sd_dp->aborted = false;
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qc_idx = sd_dp->qc_idx;
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sqp = sdebug_q_arr + sd_dp->sqa_idx;
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if (sdebug_statistics) {
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@ -3852,6 +3857,11 @@ static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
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atomic_set(&retired_max_queue, k + 1);
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}
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spin_unlock_irqrestore(&sqp->qc_lock, iflags);
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if (unlikely(aborted)) {
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if (sdebug_verbose)
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pr_info("bypassing scsi_done() due to aborted cmd\n");
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return;
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}
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scp->scsi_done(scp); /* callback to mid level */
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}
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@ -4312,7 +4322,8 @@ static void setup_inject(struct sdebug_queue *sqp,
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if (sdebug_every_nth > 0)
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sqcp->inj_recovered = sqcp->inj_transport
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= sqcp->inj_dif
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= sqcp->inj_dix = sqcp->inj_short = 0;
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= sqcp->inj_dix = sqcp->inj_short
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= sqcp->inj_host_busy = sqcp->inj_cmd_abort = 0;
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return;
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}
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sqcp->inj_recovered = !!(SDEBUG_OPT_RECOVERED_ERR & sdebug_opts);
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@ -4321,6 +4332,7 @@ static void setup_inject(struct sdebug_queue *sqp,
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sqcp->inj_dix = !!(SDEBUG_OPT_DIX_ERR & sdebug_opts);
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sqcp->inj_short = !!(SDEBUG_OPT_SHORT_TRANSFER & sdebug_opts);
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sqcp->inj_host_busy = !!(SDEBUG_OPT_HOST_BUSY & sdebug_opts);
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sqcp->inj_cmd_abort = !!(SDEBUG_OPT_CMD_ABORT & sdebug_opts);
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}
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/* Complete the processing of the thread that queued a SCSI command to this
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@ -4458,7 +4470,14 @@ static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
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if (sdebug_statistics)
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sd_dp->issuing_cpu = raw_smp_processor_id();
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sd_dp->defer_t = SDEB_DEFER_WQ;
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if (unlikely(sqcp->inj_cmd_abort))
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sd_dp->aborted = true;
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schedule_work(&sd_dp->ew.work);
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if (unlikely(sqcp->inj_cmd_abort)) {
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sdev_printk(KERN_INFO, sdp, "abort request tag %d\n",
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cmnd->request->tag);
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blk_abort_request(cmnd->request);
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}
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}
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if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) &&
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(scsi_result == device_qfull_result)))
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@ -4844,12 +4863,11 @@ static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
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(unsigned long)sdebug_dev_size_mb *
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1048576;
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fake_storep = vmalloc(sz);
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fake_storep = vzalloc(sz);
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if (NULL == fake_storep) {
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pr_err("out of memory, 9\n");
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return -ENOMEM;
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}
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memset(fake_storep, 0, sz);
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}
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sdebug_fake_rw = n;
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}
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@ -5391,13 +5409,12 @@ static int __init scsi_debug_init(void)
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}
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if (sdebug_fake_rw == 0) {
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fake_storep = vmalloc(sz);
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fake_storep = vzalloc(sz);
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if (NULL == fake_storep) {
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pr_err("out of memory, 1\n");
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ret = -ENOMEM;
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goto free_q_arr;
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}
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memset(fake_storep, 0, sz);
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if (sdebug_num_parts > 0)
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sdebug_build_parts(fake_storep, sz);
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}
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