[PATCH v8 6/9] scsi: scsi_debug: Support disabling zone write locking
From: Bart Van Assche <bvanassche@acm.org>
Date: 2023-08-11 21:36:29
Also in:
linux-scsi
Subsystem:
scsi subsystem, the rest · Maintainers:
"James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds
Make it easier to test not using zone write locking by supporting disabling zone write locking in the scsi_debug driver. Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Douglas Gilbert <dgilbert@interlog.com> Cc: Damien Le Moal <dlemoal@kernel.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Ming Lei <redacted> Signed-off-by: Bart Van Assche <bvanassche@acm.org> --- drivers/scsi/scsi_debug.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 9c0af50501f9..c44c523bde2c 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c@@ -832,6 +832,7 @@ static int dix_reads; static int dif_errors; /* ZBC global data */ +static bool sdeb_no_zwrl; static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */ static int sdeb_zbc_zone_cap_mb; static int sdeb_zbc_zone_size_mb;
@@ -5138,9 +5139,13 @@ static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev) static int scsi_debug_slave_alloc(struct scsi_device *sdp) { + struct request_queue *q = sdp->request_queue; + if (sdebug_verbose) pr_info("slave_alloc <%u %u %u %llu>\n", sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); + if (sdeb_no_zwrl) + q->limits.driver_preserves_write_order = true; return 0; }
@@ -5738,6 +5743,7 @@ module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR); module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR); module_param_named(no_rwlock, sdebug_no_rwlock, bool, S_IRUGO | S_IWUSR); module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO); +module_param_named(no_zone_write_lock, sdeb_no_zwrl, bool, S_IRUGO); module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO); module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR); module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
@@ -5812,6 +5818,8 @@ MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)"); MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)"); MODULE_PARM_DESC(no_rwlock, "don't protect user data reads+writes (def=0)"); MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))"); +MODULE_PARM_DESC(no_zone_write_lock, + "Disable serialization of zoned writes (def=0)"); MODULE_PARM_DESC(num_parts, "number of partitions(def=0)"); MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)"); MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");