diff options
| author | Lukas Herbolt <lherbolt@redhat.com> | 2017-01-26 10:00:37 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-01-31 22:08:44 -0500 |
| commit | 86e6828a8aed250be7d30f678e331b0b4180a892 (patch) | |
| tree | a32ac459bb58e7f7fe05d9a927fafa2b9f86c388 /drivers/scsi/scsi_debug.c | |
| parent | 7cfa76963f1872461adff2e84edfbaa8e17d189b (diff) | |
scsi: scsi_debug: Add OPTIMAL TRANSFER LENGTH GRANULARITY option.
[mkp: whitespace fixes]
Signed-off-by: Lukas Herbolt <lherbolt@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/scsi_debug.c')
| -rw-r--r-- | drivers/scsi/scsi_debug.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 03051e12a072..17249c3650fe 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -125,6 +125,7 @@ static const char *sdebug_version_date = "20160430"; #define DEF_OPTS 0 #define DEF_OPT_BLKS 1024 #define DEF_PHYSBLK_EXP 0 +#define DEF_OPT_XFERLEN_EXP 0 #define DEF_PTYPE TYPE_DISK #define DEF_REMOVABLE false #define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */ @@ -590,6 +591,7 @@ static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */ static int sdebug_opt_blks = DEF_OPT_BLKS; static int sdebug_opts = DEF_OPTS; static int sdebug_physblk_exp = DEF_PHYSBLK_EXP; +static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP; static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */ static int sdebug_scsi_level = DEF_SCSI_LEVEL; static int sdebug_sector_size = DEF_SECTOR_SIZE; @@ -1205,7 +1207,11 @@ static int inquiry_vpd_b0(unsigned char *arr) memcpy(arr, vpdb0_data, sizeof(vpdb0_data)); /* Optimal transfer length granularity */ - gran = 1 << sdebug_physblk_exp; + if (sdebug_opt_xferlen_exp != 0 && + sdebug_physblk_exp < sdebug_opt_xferlen_exp) + gran = 1 << sdebug_opt_xferlen_exp; + else + gran = 1 << sdebug_physblk_exp; put_unaligned_be16(gran, arr + 2); /* Maximum Transfer Length */ @@ -4161,6 +4167,7 @@ module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR); module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO); module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR); module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO); +module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO); module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR); module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR); module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO); @@ -4212,6 +4219,7 @@ 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)"); MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)"); MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)"); +MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)"); MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); MODULE_PARM_DESC(removable, "claim to have removable media (def=0)"); MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])"); |