diff options
Diffstat (limited to 'drivers/scsi/scsi_debug.c')
| -rw-r--r-- | drivers/scsi/scsi_debug.c | 1483 |
1 files changed, 1057 insertions, 426 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 1328a2621070..d19c0e3c7f48 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -42,6 +42,10 @@ #include <linux/scatterlist.h> #include <linux/blkdev.h> #include <linux/crc-t10dif.h> +#include <linux/spinlock.h> +#include <linux/interrupt.h> +#include <linux/atomic.h> +#include <linux/hrtimer.h> #include <net/checksum.h> @@ -53,13 +57,16 @@ #include <scsi/scsi_host.h> #include <scsi/scsicam.h> #include <scsi/scsi_eh.h> +#include <scsi/scsi_tcq.h> #include <scsi/scsi_dbg.h> #include "sd.h" #include "scsi_logging.h" -#define SCSI_DEBUG_VERSION "1.82" -static const char * scsi_debug_version_date = "20100324"; +#define SCSI_DEBUG_VERSION "1.84" +static const char *scsi_debug_version_date = "20140706"; + +#define MY_NAME "scsi_debug" /* Additional Sense Code (ASC) */ #define NO_ADDITIONAL_SENSE 0x0 @@ -72,7 +79,11 @@ static const char * scsi_debug_version_date = "20100324"; #define INVALID_COMMAND_OPCODE 0x20 #define INVALID_FIELD_IN_CDB 0x24 #define INVALID_FIELD_IN_PARAM_LIST 0x26 -#define POWERON_RESET 0x29 +#define UA_RESET_ASC 0x29 +#define UA_CHANGED_ASC 0x2a +#define POWER_ON_RESET_ASCQ 0x0 +#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */ +#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */ #define SAVING_PARAMS_UNSUP 0x39 #define TRANSPORT_PROBLEM 0x4b #define THRESHOLD_EXCEEDED 0x5d @@ -81,7 +92,6 @@ static const char * scsi_debug_version_date = "20100324"; /* Additional Sense Code Qualifier (ASCQ) */ #define ACK_NAK_TO 0x3 -#define SDEBUG_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */ /* Default values for driver parameters */ #define DEF_NUM_HOST 1 @@ -91,7 +101,7 @@ static const char * scsi_debug_version_date = "20100324"; * (id 0) containing 1 logical unit (lun 0). That is 1 device. */ #define DEF_ATO 1 -#define DEF_DELAY 1 +#define DEF_DELAY 1 /* if > 0 unit is a jiffy */ #define DEF_DEV_SIZE_MB 8 #define DEF_DIF 0 #define DEF_DIX 0 @@ -99,11 +109,13 @@ static const char * scsi_debug_version_date = "20100324"; #define DEF_EVERY_NTH 0 #define DEF_FAKE_RW 0 #define DEF_GUARD 0 +#define DEF_HOST_LOCK 0 #define DEF_LBPU 0 #define DEF_LBPWS 0 #define DEF_LBPWS10 0 #define DEF_LBPRZ 1 #define DEF_LOWEST_ALIGNED 0 +#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */ #define DEF_NO_LUN_0 0 #define DEF_NUM_PARTS 0 #define DEF_OPTS 0 @@ -113,6 +125,7 @@ static const char * scsi_debug_version_date = "20100324"; #define DEF_REMOVABLE false #define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */ #define DEF_SECTOR_SIZE 512 +#define DEF_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */ #define DEF_UNMAP_ALIGNMENT 0 #define DEF_UNMAP_GRANULARITY 1 #define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF @@ -120,6 +133,7 @@ static const char * scsi_debug_version_date = "20100324"; #define DEF_VIRTUAL_GB 0 #define DEF_VPD_USE_HOSTNO 1 #define DEF_WRITESAME_LENGTH 0xFFFF +#define DELAY_OVERRIDDEN -9999 /* bit mask values for scsi_debug_opts */ #define SCSI_DEBUG_OPT_NOISE 1 @@ -130,7 +144,14 @@ static const char * scsi_debug_version_date = "20100324"; #define SCSI_DEBUG_OPT_DIF_ERR 32 #define SCSI_DEBUG_OPT_DIX_ERR 64 #define SCSI_DEBUG_OPT_MAC_TIMEOUT 128 -#define SCSI_DEBUG_OPT_SHORT_TRANSFER 256 +#define SCSI_DEBUG_OPT_SHORT_TRANSFER 0x100 +#define SCSI_DEBUG_OPT_Q_NOISE 0x200 +#define SCSI_DEBUG_OPT_ALL_TSF 0x400 +#define SCSI_DEBUG_OPT_RARE_TSF 0x800 +#define SCSI_DEBUG_OPT_N_WCE 0x1000 +#define SCSI_DEBUG_OPT_RESET_NOISE 0x2000 +#define SCSI_DEBUG_OPT_NO_CDB_NOISE 0x4000 +#define SCSI_DEBUG_OPT_ALL_NOISE (0x1 | 0x200 | 0x2000) /* When "every_nth" > 0 then modulo "every_nth" commands: * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set * - a RECOVERED_ERROR is simulated on successful read and write @@ -148,6 +169,19 @@ static const char * scsi_debug_version_date = "20100324"; * writing a new value (other than -1 or 1) to every_nth via sysfs). */ +/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs)are returned in + * priority order. In the subset implemented here lower numbers have higher + * priority. The UA numbers should be a sequence starting from 0 with + * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */ +#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */ +#define SDEBUG_UA_BUS_RESET 1 +#define SDEBUG_UA_MODE_CHANGED 2 +#define SDEBUG_NUM_UAS 3 + +/* for check_readiness() */ +#define UAS_ONLY 1 +#define UAS_TUR 0 + /* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this * sector on read commands: */ #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */ @@ -158,9 +192,19 @@ static const char * scsi_debug_version_date = "20100324"; #define SAM2_LUN_ADDRESS_METHOD 0 #define SAM2_WLUN_REPORT_LUNS 0xc101 -/* Can queue up to this number of commands. Typically commands that - * that have a non-zero delay are queued. */ -#define SCSI_DEBUG_CANQUEUE 255 +/* SCSI_DEBUG_CANQUEUE is the maximum number of commands that can be queued + * (for response) at one time. Can be reduced by max_queue option. Command + * responses are not queued when delay=0 and ndelay=0. The per-device + * DEF_CMD_PER_LUN can be changed via sysfs: + * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth but cannot exceed + * SCSI_DEBUG_CANQUEUE. */ +#define SCSI_DEBUG_CANQUEUE_WORDS 9 /* a WORD is bits in a long */ +#define SCSI_DEBUG_CANQUEUE (SCSI_DEBUG_CANQUEUE_WORDS * BITS_PER_LONG) +#define DEF_CMD_PER_LUN 255 + +#if DEF_CMD_PER_LUN > SCSI_DEBUG_CANQUEUE +#warning "Expect DEF_CMD_PER_LUN <= SCSI_DEBUG_CANQUEUE" +#endif static int scsi_debug_add_host = DEF_NUM_HOST; static int scsi_debug_ato = DEF_ATO; @@ -175,6 +219,8 @@ static unsigned int scsi_debug_guard = DEF_GUARD; static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED; static int scsi_debug_max_luns = DEF_MAX_LUNS; static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE; +static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */ +static int scsi_debug_ndelay = DEF_NDELAY; static int scsi_debug_no_lun_0 = DEF_NO_LUN_0; static int scsi_debug_no_uld = 0; static int scsi_debug_num_parts = DEF_NUM_PARTS; @@ -198,8 +244,11 @@ static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC; static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH; static bool scsi_debug_removable = DEF_REMOVABLE; static bool scsi_debug_clustering; +static bool scsi_debug_host_lock = DEF_HOST_LOCK; -static int scsi_debug_cmnd_count = 0; +static atomic_t sdebug_cmnd_count; +static atomic_t sdebug_completions; +static atomic_t sdebug_a_tsf; /* counter of 'almost' TSFs */ #define DEV_READONLY(TGT) (0) @@ -214,24 +263,23 @@ static int sdebug_sectors_per; /* sectors per cylinder */ #define SDEBUG_MAX_PARTS 4 -#define SDEBUG_SENSE_LEN 32 - #define SCSI_DEBUG_MAX_CMD_LEN 32 static unsigned int scsi_debug_lbp(void) { - return scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10; + return ((0 == scsi_debug_fake_rw) && + (scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10)); } struct sdebug_dev_info { struct list_head dev_list; - unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */ unsigned int channel; unsigned int target; - unsigned int lun; + u64 lun; struct sdebug_host_info *sdbg_host; - unsigned int wlun; - char reset; + u64 wlun; + unsigned long uas_bm[1]; + atomic_t num_in_q; char stopped; char used; }; @@ -249,26 +297,33 @@ struct sdebug_host_info { static LIST_HEAD(sdebug_host_list); static DEFINE_SPINLOCK(sdebug_host_list_lock); -typedef void (* done_funct_t) (struct scsi_cmnd *); + +struct sdebug_hrtimer { /* ... is derived from hrtimer */ + struct hrtimer hrt; /* must be first element */ + int qa_indx; +}; struct sdebug_queued_cmd { - int in_use; - struct timer_list cmnd_timer; - done_funct_t done_funct; + /* in_use flagged by a bit in queued_in_use_bm[] */ + struct timer_list *cmnd_timerp; + struct tasklet_struct *tletp; + struct sdebug_hrtimer *sd_hrtp; struct scsi_cmnd * a_cmnd; - int scsi_result; }; static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE]; +static unsigned long queued_in_use_bm[SCSI_DEBUG_CANQUEUE_WORDS]; + static unsigned char * fake_storep; /* ramdisk storage */ static struct sd_dif_tuple *dif_storep; /* protection info */ static void *map_storep; /* provisioning map */ static unsigned long map_size; -static int num_aborts = 0; -static int num_dev_resets = 0; -static int num_bus_resets = 0; -static int num_host_resets = 0; +static int num_aborts; +static int num_dev_resets; +static int num_target_resets; +static int num_bus_resets; +static int num_host_resets; static int dix_writes; static int dix_reads; static int dif_errors; @@ -276,7 +331,8 @@ static int dif_errors; static DEFINE_SPINLOCK(queued_arr_lock); static DEFINE_RWLOCK(atomic_rw); -static char sdebug_proc_name[] = "scsi_debug"; +static char sdebug_proc_name[] = MY_NAME; +static const char *my_name = MY_NAME; static struct bus_type pseudo_lld_bus; @@ -291,6 +347,12 @@ static const int check_condition_result = static const int illegal_condition_result = (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION; +static const int device_qfull_result = + (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL; + +static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, + 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, + 0, 0, 0, 0}; static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 0, 0, 0x2, 0x4b}; static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, @@ -332,19 +394,24 @@ static void sdebug_max_tgts_luns(void) spin_unlock(&sdebug_host_list_lock); } -static void mk_sense_buffer(struct sdebug_dev_info *devip, int key, - int asc, int asq) +static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq) { unsigned char *sbuff; - sbuff = devip->sense_buff; - memset(sbuff, 0, SDEBUG_SENSE_LEN); + sbuff = scp->sense_buffer; + if (!sbuff) { + sdev_printk(KERN_ERR, scp->device, + "%s: sense_buffer is NULL\n", __func__); + return; + } + memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE); scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq); if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) - printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: " - "[0x%x,0x%x,0x%x]\n", key, asc, asq); + sdev_printk(KERN_INFO, scp->device, + "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n", + my_name, key, asc, asq); } static void get_data_transfer_info(unsigned char *cmd, @@ -409,29 +476,71 @@ static void get_data_transfer_info(unsigned char *cmd, static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg) { if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { - printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd); + if (0x1261 == cmd) + sdev_printk(KERN_INFO, dev, + "%s: BLKFLSBUF [0x1261]\n", __func__); + else if (0x5331 == cmd) + sdev_printk(KERN_INFO, dev, + "%s: CDROM_GET_CAPABILITY [0x5331]\n", + __func__); + else + sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n", + __func__, cmd); } return -EINVAL; /* return -ENOTTY; // correct return but upsets fdisk */ } -static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only, +static int check_readiness(struct scsi_cmnd *SCpnt, int uas_only, struct sdebug_dev_info * devip) { - if (devip->reset) { - if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) - printk(KERN_INFO "scsi_debug: Reporting Unit " - "attention: power on reset\n"); - devip->reset = 0; - mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0); + int k; + bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts); + + k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS); + if (k != SDEBUG_NUM_UAS) { + const char *cp = NULL; + + switch (k) { + case SDEBUG_UA_POR: + mk_sense_buffer(SCpnt, UNIT_ATTENTION, + UA_RESET_ASC, POWER_ON_RESET_ASCQ); + if (debug) + cp = "power on reset"; + break; + case SDEBUG_UA_BUS_RESET: + mk_sense_buffer(SCpnt, UNIT_ATTENTION, + UA_RESET_ASC, BUS_RESET_ASCQ); + if (debug) + cp = "bus reset"; + break; + case SDEBUG_UA_MODE_CHANGED: + mk_sense_buffer(SCpnt, UNIT_ATTENTION, + UA_CHANGED_ASC, MODE_CHANGED_ASCQ); + if (debug) + cp = "mode parameters changed"; + break; + default: + pr_warn("%s: unexpected unit attention code=%d\n", + __func__, k); + if (debug) + cp = "unknown"; + break; + } + clear_bit(k, devip->uas_bm); + if (debug) + sdev_printk(KERN_INFO, SCpnt->device, + "%s reports: Unit attention: %s\n", + my_name, cp); return check_condition_result; } - if ((0 == reset_only) && devip->stopped) { - if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) - printk(KERN_INFO "scsi_debug: Reporting Not " - "ready: initializing command required\n"); - mk_sense_buffer(devip, NOT_READY, LOGICAL_UNIT_NOT_READY, + if ((UAS_TUR == uas_only) && devip->stopped) { + mk_sense_buffer(SCpnt, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2); + if (debug) + sdev_printk(KERN_INFO, SCpnt->device, + "%s reports: Not ready: %s\n", my_name, + "initializing command required"); return check_condition_result; } return 0; @@ -471,8 +580,9 @@ static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, static const char * inq_vendor_id = "Linux "; static const char * inq_product_id = "scsi_debug "; -static const char * inq_product_rev = "0004"; +static const char *inq_product_rev = "0184"; /* version less '.' */ +/* Device identification VPD page. Returns number of bytes placed in arr */ static int inquiry_evpd_83(unsigned char * arr, int port_group_id, int target_dev_id, int dev_id_num, const char * dev_id_str, @@ -573,12 +683,14 @@ static unsigned char vpd84_data[] = { 0x22,0x22,0x22,0x0,0xbb,0x2, }; +/* Software interface identification VPD page */ static int inquiry_evpd_84(unsigned char * arr) { memcpy(arr, vpd84_data, sizeof(vpd84_data)); return sizeof(vpd84_data); } +/* Management network addresses VPD page */ static int inquiry_evpd_85(unsigned char * arr) { int num = 0; @@ -713,6 +825,7 @@ static unsigned char vpd89_data[] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51, }; +/* ATA Information VPD page */ static int inquiry_evpd_89(unsigned char * arr) { memcpy(arr, vpd89_data, sizeof(vpd89_data)); @@ -720,7 +833,6 @@ static int inquiry_evpd_89(unsigned char * arr) } -/* Block limits VPD page (SBC-3) */ static unsigned char vpdb0_data[] = { /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, @@ -728,6 +840,7 @@ static unsigned char vpdb0_data[] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, }; +/* Block limits VPD page (SBC-3) */ static int inquiry_evpd_b0(unsigned char * arr) { unsigned int gran; @@ -811,7 +924,7 @@ static int inquiry_evpd_b2(unsigned char *arr) #define SDEBUG_LONG_INQ_SZ 96 #define SDEBUG_MAX_INQ_ARR_SZ 584 -static int resp_inquiry(struct scsi_cmnd * scp, int target, +static int resp_inquiry(struct scsi_cmnd *scp, int target, struct sdebug_dev_info * devip) { unsigned char pq_pdt; @@ -831,7 +944,7 @@ static int resp_inquiry(struct scsi_cmnd * scp, int target, pq_pdt = (scsi_debug_ptype & 0x1f); arr[0] = pq_pdt; if (0x2 & cmd[1]) { /* CMDDT bit set */ - mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); kfree(arr); return check_condition_result; @@ -917,7 +1030,7 @@ static int resp_inquiry(struct scsi_cmnd * scp, int target, arr[3] = inquiry_evpd_b2(&arr[4]); } else { /* Illegal request, invalid field in cdb */ - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); kfree(arr); return check_condition_result; @@ -963,15 +1076,13 @@ static int resp_requests(struct scsi_cmnd * scp, { unsigned char * sbuff; unsigned char *cmd = (unsigned char *)scp->cmnd; - unsigned char arr[SDEBUG_SENSE_LEN]; + unsigned char arr[SCSI_SENSE_BUFFERSIZE]; int want_dsense; int len = 18; memset(arr, 0, sizeof(arr)); - if (devip->reset == 1) - mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0); want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense; - sbuff = devip->sense_buff; + sbuff = scp->sense_buffer; if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) { if (want_dsense) { arr[0] = 0x72; @@ -986,7 +1097,7 @@ static int resp_requests(struct scsi_cmnd * scp, arr[13] = 0xff; /* TEST set and MRIE==6 */ } } else { - memcpy(arr, sbuff, SDEBUG_SENSE_LEN); + memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE); if ((cmd[1] & 1) && (! scsi_debug_dsense)) { /* DESC bit set and sense_buff in fixed format */ memset(arr, 0, sizeof(arr)); @@ -997,7 +1108,7 @@ static int resp_requests(struct scsi_cmnd * scp, len = 8; } } - mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0); + mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0); return fill_from_dev_buffer(scp, arr, len); } @@ -1007,11 +1118,12 @@ static int resp_start_stop(struct scsi_cmnd * scp, unsigned char *cmd = (unsigned char *)scp->cmnd; int power_cond, errsts, start; - if ((errsts = check_readiness(scp, 1, devip))) + errsts = check_readiness(scp, UAS_ONLY, devip); + if (errsts) return errsts; power_cond = (cmd[4] & 0xf0) >> 4; if (power_cond) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } @@ -1038,7 +1150,8 @@ static int resp_readcap(struct scsi_cmnd * scp, unsigned int capac; int errsts; - if ((errsts = check_readiness(scp, 1, devip))) + errsts = check_readiness(scp, UAS_ONLY, devip); + if (errsts) return errsts; /* following just in case virtual_gb changed */ sdebug_capacity = get_sdebug_capacity(); @@ -1069,7 +1182,8 @@ static int resp_readcap16(struct scsi_cmnd * scp, unsigned long long capac; int errsts, k, alloc_len; - if ((errsts = check_readiness(scp, 1, devip))) + errsts = check_readiness(scp, UAS_ONLY, devip); + if (errsts) return errsts; alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8) + cmd[13]); @@ -1230,12 +1344,18 @@ static int resp_format_pg(unsigned char * p, int pcontrol, int target) static int resp_caching_pg(unsigned char * p, int pcontrol, int target) { /* Caching page for mode_sense */ - unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, + unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; + if (SCSI_DEBUG_OPT_N_WCE & scsi_debug_opts) + caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */ memcpy(p, caching_pg, sizeof(caching_pg)); if (1 == pcontrol) - memset(p + 2, 0, sizeof(caching_pg) - 2); + memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg)); + else if (2 == pcontrol) + memcpy(p, d_caching_pg, sizeof(d_caching_pg)); return sizeof(caching_pg); } @@ -1350,7 +1470,8 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target, unsigned char arr[SDEBUG_MAX_MSENSE_SZ]; unsigned char *cmd = (unsigned char *)scp->cmnd; - if ((errsts = check_readiness(scp, 1, devip))) + errsts = check_readiness(scp, UAS_ONLY, devip); + if (errsts) return errsts; dbd = !!(cmd[1] & 0x8); pcontrol = (cmd[2] & 0xc0) >> 6; @@ -1365,8 +1486,7 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target, alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]); memset(arr, 0, SDEBUG_MAX_MSENSE_SZ); if (0x3 == pcontrol) { /* Saving values not supported */ - mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, - 0); + mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0); return check_condition_result; } target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) + @@ -1422,7 +1542,7 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target, if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) { /* TODO: Control Extension page */ - mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } @@ -1449,7 +1569,7 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target, break; case 0x19: /* if spc==1 then sas phy, control+discover */ if ((subpcode > 0x2) && (subpcode < 0xff)) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } @@ -1482,14 +1602,14 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target, } len += resp_iec_m_pg(ap + len, pcontrol, target); } else { - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } offset += len; break; default: - mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } @@ -1512,14 +1632,15 @@ static int resp_mode_select(struct scsi_cmnd * scp, int mselect6, unsigned char arr[SDEBUG_MAX_MSELECT_SZ]; unsigned char *cmd = (unsigned char *)scp->cmnd; - if ((errsts = check_readiness(scp, 1, devip))) + errsts = check_readiness(scp, UAS_ONLY, devip); + if (errsts) return errsts; memset(arr, 0, sizeof(arr)); pf = cmd[1] & 0x10; sp = cmd[1] & 0x1; param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]); if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } @@ -1528,12 +1649,13 @@ static int resp_mode_select(struct scsi_cmnd * scp, int mselect6, return (DID_ERROR << 16); else if ((res < param_len) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) - printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, " - " IO sent=%d bytes\n", param_len, res); + sdev_printk(KERN_INFO, scp->device, + "%s: cdb indicated=%d, IO sent=%d bytes\n", + __func__, param_len, res); md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2); bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]); if (md_len > 2) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_PARAM_LIST, 0); return check_condition_result; } @@ -1541,7 +1663,7 @@ static int resp_mode_select(struct scsi_cmnd * scp, int mselect6, mpage = arr[off] & 0x3f; ps = !!(arr[off] & 0x80); if (ps) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_PARAM_LIST, 0); return check_condition_result; } @@ -1549,32 +1671,42 @@ static int resp_mode_select(struct scsi_cmnd * scp, int mselect6, pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) : (arr[off + 1] + 2); if ((pg_len + off) > param_len) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(scp, ILLEGAL_REQUEST, PARAMETER_LIST_LENGTH_ERR, 0); return check_condition_result; } switch (mpage) { + case 0x8: /* Caching Mode page */ + if (caching_pg[1] == arr[off + 1]) { + memcpy(caching_pg + 2, arr + off + 2, + sizeof(caching_pg) - 2); + goto set_mode_changed_ua; + } + break; case 0xa: /* Control Mode page */ if (ctrl_m_pg[1] == arr[off + 1]) { memcpy(ctrl_m_pg + 2, arr + off + 2, sizeof(ctrl_m_pg) - 2); scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4); - return 0; + goto set_mode_changed_ua; } break; case 0x1c: /* Informational Exceptions Mode page */ if (iec_m_pg[1] == arr[off + 1]) { memcpy(iec_m_pg + 2, arr + off + 2, sizeof(iec_m_pg) - 2); - return 0; + goto set_mode_changed_ua; } break; default: break; } - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_PARAM_LIST, 0); return check_condition_result; +set_mode_changed_ua: + set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm); + return 0; } static int resp_temp_l_pg(unsigned char * arr) @@ -1609,13 +1741,14 @@ static int resp_log_sense(struct scsi_cmnd * scp, unsigned char arr[SDEBUG_MAX_LSENSE_SZ]; unsigned char *cmd = (unsigned char *)scp->cmnd; - if ((errsts = check_readiness(scp, 1, devip))) + errsts = check_readiness(scp, UAS_ONLY, devip); + if (errsts) return errsts; memset(arr, 0, sizeof(arr)); ppc = cmd[1] & 0x2; sp = cmd[1] & 0x1; if (ppc || sp) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } @@ -1640,7 +1773,7 @@ static int resp_log_sense(struct scsi_cmnd * scp, arr[3] = resp_ie_l_pg(arr + 4); break; default: - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } @@ -1673,12 +1806,12 @@ static int resp_log_sense(struct scsi_cmnd * scp, arr[3] = n - 4; break; default: - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } } else { - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } @@ -1687,16 +1820,16 @@ static int resp_log_sense(struct scsi_cmnd * scp, min(len, SDEBUG_MAX_INQ_ARR_SZ)); } -static int check_device_access_params(struct sdebug_dev_info *devi, +static int check_device_access_params(struct scsi_cmnd *scp, unsigned long long lba, unsigned int num) { if (lba + num > sdebug_capacity) { - mk_sense_buffer(devi, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0); + mk_sense_buffer(scp, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0); return check_condition_result; } /* transfer length excessive (tie in to block limits VPD page) */ if (num > sdebug_store_sectors) { - mk_sense_buffer(devi, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } return 0; @@ -1704,7 +1837,6 @@ static int check_device_access_params(struct sdebug_dev_info *devi, /* Returns number of bytes copied or -1 if error. */ static int do_device_access(struct scsi_cmnd *scmd, - struct sdebug_dev_info *devi, unsigned long long lba, unsigned int num, int write) { int ret; @@ -1861,13 +1993,12 @@ static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec, } static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba, - unsigned int num, struct sdebug_dev_info *devip, - u32 ei_lba) + unsigned int num, u32 ei_lba) { unsigned long iflags; int ret; - ret = check_device_access_params(devip, lba, num); + ret = check_device_access_params(SCpnt, lba, num); if (ret) return ret; @@ -1875,16 +2006,16 @@ static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba, (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) && ((lba + num) > OPT_MEDIUM_ERR_ADDR)) { /* claim unrecoverable read error */ - mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0); + mk_sense_buffer(SCpnt, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0); /* set info field and valid bit for fixed descriptor */ - if (0x70 == (devip->sense_buff[0] & 0x7f)) { - devip->sense_buff[0] |= 0x80; /* Valid bit */ + if (0x70 == (SCpnt->sense_buffer[0] & 0x7f)) { + SCpnt->sense_buffer[0] |= 0x80; /* Valid bit */ ret = (lba < OPT_MEDIUM_ERR_ADDR) ? OPT_MEDIUM_ERR_ADDR : (int)lba; - devip->sense_buff[3] = (ret >> 24) & 0xff; - devip->sense_buff[4] = (ret >> 16) & 0xff; - devip->sense_buff[5] = (ret >> 8) & 0xff; - devip->sense_buff[6] = ret & 0xff; + SCpnt->sense_buffer[3] = (ret >> 24) & 0xff; + SCpnt->sense_buffer[4] = (ret >> 16) & 0xff; + SCpnt->sense_buffer[5] = (ret >> 8) & 0xff; + SCpnt->sense_buffer[6] = ret & 0xff; } scsi_set_resid(SCpnt, scsi_bufflen(SCpnt)); return check_condition_result; @@ -1898,12 +2029,12 @@ static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba, if (prot_ret) { read_unlock_irqrestore(&atomic_rw, iflags); - mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret); + mk_sense_buffer(SCpnt, ABORTED_COMMAND, 0x10, prot_ret); return illegal_condition_result; } } - ret = do_device_access(SCpnt, devip, lba, num, 0); + ret = do_device_access(SCpnt, lba, num, 0); read_unlock_irqrestore(&atomic_rw, iflags); if (ret == -1) return DID_ERROR << 16; @@ -1915,22 +2046,23 @@ static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba, void dump_sector(unsigned char *buf, int len) { - int i, j; - - printk(KERN_ERR ">>> Sector Dump <<<\n"); + int i, j, n; + pr_err(">>> Sector Dump <<<\n"); for (i = 0 ; i < len ; i += 16) { - printk(KERN_ERR "%04d: ", i); + char b[128]; - for (j = 0 ; j < 16 ; j++) { + for (j = 0, n = 0; j < 16; j++) { unsigned char c = buf[i+j]; + if (c >= 0x20 && c < 0x7e) - printk(" %c ", buf[i+j]); + n += scnprintf(b + n, sizeof(b) - n, + " %c ", buf[i+j]); else - printk("%02x ", buf[i+j]); + n += scnprintf(b + n, sizeof(b) - n, + "%02x ", buf[i+j]); } - - printk("\n"); + pr_err("%04d: %s\n", i, b); } } @@ -2092,13 +2224,12 @@ static void unmap_region(sector_t lba, unsigned int len) } static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba, - unsigned int num, struct sdebug_dev_info *devip, - u32 ei_lba) + unsigned int num, u32 ei_lba) { unsigned long iflags; int ret; - ret = check_device_access_params(devip, lba, num); + ret = check_device_access_params(SCpnt, lba, num); if (ret) return ret; @@ -2110,12 +2241,13 @@ static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba, if (prot_ret) { write_unlock_irqrestore(&atomic_rw, iflags); - mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret); + mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, 0x10, + prot_ret); return illegal_condition_result; } } - ret = do_device_access(SCpnt, devip, lba, num, 1); + ret = do_device_access(SCpnt, lba, num, 1); if (scsi_debug_lbp()) map_region(lba, num); write_unlock_irqrestore(&atomic_rw, iflags); @@ -2123,26 +2255,26 @@ static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba, return (DID_ERROR << 16); else if ((ret < (num * scsi_debug_sector_size)) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) - printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, " - " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret); + sdev_printk(KERN_INFO, SCpnt->device, + "%s: write: cdb indicated=%u, IO sent=%d bytes\n", + my_name, num * scsi_debug_sector_size, ret); return 0; } static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba, - unsigned int num, struct sdebug_dev_info *devip, - u32 ei_lba, unsigned int unmap) + unsigned int num, u32 ei_lba, unsigned int unmap) { unsigned long iflags; unsigned long long i; int ret; - ret = check_device_access_params(devip, lba, num); + ret = check_device_access_params(scmd, lba, num); if (ret) return ret; if (num > scsi_debug_write_same_length) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, + mk_sense_buffer(scmd, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } @@ -2164,8 +2296,10 @@ static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba, return (DID_ERROR << 16); } else if ((ret < (num * scsi_debug_sector_size)) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) - printk(KERN_INFO "scsi_debug: write same: cdb indicated=%u, " - " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret); + sdev_printk(KERN_INFO, scmd->device, + "%s: %s: cdb indicated=%u, IO sent=%d bytes\n", + my_name, "write same", + num * scsi_debug_sector_size, ret); /* Copy first sector to remaining blocks */ for (i = 1 ; i < num ; i++) @@ -2195,7 +2329,7 @@ static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip) int ret; unsigned long iflags; - ret = check_readiness(scmd, 1, devip); + ret = check_readiness(scmd, UAS_ONLY, devip); if (ret) return ret; @@ -2221,7 +2355,7 @@ static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip) unsigned long long lba = get_unaligned_be64(&desc[i].lba); unsigned int num = get_unaligned_be32(&desc[i].blocks); - ret = check_device_access_params(devip, lba, num); + ret = check_device_access_params(scmd, lba, num); if (ret) goto out; @@ -2247,7 +2381,7 @@ static int resp_get_lba_status(struct scsi_cmnd * scmd, unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN]; int ret; - ret = check_readiness(scmd, 1, devip); + ret = check_readiness(scmd, UAS_ONLY, devip); if (ret) return ret; @@ -2257,7 +2391,7 @@ static int resp_get_lba_status(struct scsi_cmnd * scmd, if (alloc_len < 24) return 0; - ret = check_device_access_params(devip, lba, 1); + ret = check_device_access_params(scmd, lba, 1); if (ret) return ret; @@ -2278,7 +2412,8 @@ static int resp_report_luns(struct scsi_cmnd * scp, struct sdebug_dev_info * devip) { unsigned int alloc_len; - int lun_cnt, i, upper, num, n, wlun, lun; + int lun_cnt, i, upper, num, n; + u64 wlun, lun; unsigned char *cmd = (unsigned char *)scp->cmnd; int select_report = (int)cmd[2]; struct scsi_lun *one_lun; @@ -2287,7 +2422,7 @@ static int resp_report_luns(struct scsi_cmnd * scp, alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24); if ((alloc_len < 4) || (select_report > 2)) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } @@ -2341,7 +2476,7 @@ static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba, /* better not to use temporary buffer. */ buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC); if (!buf) { - mk_sense_buffer(devip, NOT_READY, + mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); return check_condition_result; } @@ -2365,34 +2500,125 @@ static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba, return 0; } -/* When timer goes off this function is called. */ -static void timer_intr_handler(unsigned long indx) +/* When timer or tasklet goes off this function is called. */ +static void sdebug_q_cmd_complete(unsigned long indx) { - struct sdebug_queued_cmd * sqcp; + int qa_indx; + int retiring = 0; unsigned long iflags; + struct sdebug_queued_cmd *sqcp; + struct scsi_cmnd *scp; + struct sdebug_dev_info *devip; - if (indx >= scsi_debug_max_queue) { - printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too " - "large\n"); + atomic_inc(&sdebug_completions); + qa_indx = indx; + if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) { + pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx); return; } spin_lock_irqsave(&queued_arr_lock, iflags); - sqcp = &queued_arr[(int)indx]; - if (! sqcp->in_use) { - printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected " - "interrupt\n"); + sqcp = &queued_arr[qa_indx]; + scp = sqcp->a_cmnd; + if (NULL == scp) { + spin_unlock_irqrestore(&queued_arr_lock, iflags); + pr_err("%s: scp is NULL\n", __func__); + return; + } + devip = (struct sdebug_dev_info *)scp->device->hostdata; + if (devip) + atomic_dec(&devip->num_in_q); + else + pr_err("%s: devip=NULL\n", __func__); + if (atomic_read(&retired_max_queue) > 0) + retiring = 1; + + sqcp->a_cmnd = NULL; + if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) { spin_unlock_irqrestore(&queued_arr_lock, iflags); + pr_err("%s: Unexpected completion\n", __func__); return; } - sqcp->in_use = 0; - if (sqcp->done_funct) { - sqcp->a_cmnd->result = sqcp->scsi_result; - sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */ + + if (unlikely(retiring)) { /* user has reduced max_queue */ + int k, retval; + + retval = atomic_read(&retired_max_queue); + if (qa_indx >= retval) { + spin_unlock_irqrestore(&queued_arr_lock, iflags); + pr_err("%s: index %d too large\n", __func__, retval); + return; + } + k = find_last_bit(queued_in_use_bm, retval); + if ((k < scsi_debug_max_queue) || (k == retval)) + atomic_set(&retired_max_queue, 0); + else + atomic_set(&retired_max_queue, k + 1); } - sqcp->done_funct = NULL; spin_unlock_irqrestore(&queued_arr_lock, iflags); + scp->scsi_done(scp); /* callback to mid level */ } +/* When high resolution timer goes off this function is called. */ +static enum hrtimer_restart +sdebug_q_cmd_hrt_complete(struct hrtimer *timer) +{ + int qa_indx; + int retiring = 0; + unsigned long iflags; + struct sdebug_hrtimer *sd_hrtp = (struct sdebug_hrtimer *)timer; + struct sdebug_queued_cmd *sqcp; + struct scsi_cmnd *scp; + struct sdebug_dev_info *devip; + + atomic_inc(&sdebug_completions); + qa_indx = sd_hrtp->qa_indx; + if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) { + pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx); + goto the_end; + } + spin_lock_irqsave(&queued_arr_lock, iflags); + sqcp = &queued_arr[qa_indx]; + scp = sqcp->a_cmnd; + if (NULL == scp) { + spin_unlock_irqrestore(&queued_arr_lock, iflags); + pr_err("%s: scp is NULL\n", __func__); + goto the_end; + } + devip = (struct sdebug_dev_info *)scp->device->hostdata; + if (devip) + atomic_dec(&devip->num_in_q); + else + pr_err("%s: devip=NULL\n", __func__); + if (atomic_read(&retired_max_queue) > 0) + retiring = 1; + + sqcp->a_cmnd = NULL; + if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) { + spin_unlock_irqrestore(&queued_arr_lock, iflags); + pr_err("%s: Unexpected completion\n", __func__); + goto the_end; + } + + if (unlikely(retiring)) { /* user has reduced max_queue */ + int k, retval; + + retval = atomic_read(&retired_max_queue); + if (qa_indx >= retval) { + spin_unlock_irqrestore(&queued_arr_lock, iflags); + pr_err("%s: index %d too large\n", __func__, retval); + goto the_end; + } + k = find_last_bit(queued_in_use_bm, retval); + if ((k < scsi_debug_max_queue) || (k == retval)) + atomic_set(&retired_max_queue, 0); + else + atomic_set(&retired_max_queue, k + 1); + } + spin_unlock_irqrestore(&queued_arr_lock, iflags); + scp->scsi_done(scp); /* callback to mid level */ +the_end: + return HRTIMER_NORESTART; +} static struct sdebug_dev_info * sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags) @@ -2418,7 +2644,7 @@ static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev) return devip; sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host); if (!sdbg_host) { - printk(KERN_ERR "Host info NULL\n"); + pr_err("%s: Host info NULL\n", __func__); return NULL; } list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { @@ -2444,15 +2670,9 @@ static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev) open_devip->target = sdev->id; open_devip->lun = sdev->lun; open_devip->sdbg_host = sdbg_host; - open_devip->reset = 1; + atomic_set(&open_devip->num_in_q, 0); + set_bit(SDEBUG_UA_POR, open_devip->uas_bm); open_devip->used = 1; - memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN); - if (scsi_debug_dsense) - open_devip->sense_buff[0] = 0x72; - else { - open_devip->sense_buff[0] = 0x70; - open_devip->sense_buff[7] = 0xa; - } if (sdev->lun == SAM2_WLUN_REPORT_LUNS) open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff; @@ -2462,7 +2682,7 @@ static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev) static int scsi_debug_slave_alloc(struct scsi_device *sdp) { if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) - printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n", + printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %llu>\n", sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue); return 0; @@ -2473,7 +2693,7 @@ static int scsi_debug_slave_configure(struct scsi_device *sdp) struct sdebug_dev_info *devip; if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) - printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n", + printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %llu>\n", sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN) sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN; @@ -2481,10 +2701,11 @@ static int scsi_debug_slave_configure(struct scsi_device *sdp) if (NULL == devip) return 1; /* no resources, will be marked offline */ sdp->hostdata = devip; + sdp->tagged_supported = 1; if (sdp->host->cmd_per_lun) - scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING, - sdp->host->cmd_per_lun); - blk_queue_max_segment_size(sdp->request_queue, 256 * 1024); + scsi_adjust_queue_depth(sdp, DEF_TAGGED_QUEUING, + DEF_CMD_PER_LUN); + blk_queue_max_segment_size(sdp->request_queue, -1U); if (scsi_debug_no_uld) sdp->no_uld_attach = 1; return 0; @@ -2496,7 +2717,7 @@ static void scsi_debug_slave_destroy(struct scsi_device *sdp) (struct sdebug_dev_info *)sdp->hostdata; if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) - printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n", + printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %llu>\n", sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); if (devip) { /* make this slot available for re-use */ @@ -2505,150 +2726,230 @@ static void scsi_debug_slave_destroy(struct scsi_device *sdp) } } -/* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */ +/* Returns 1 if cmnd found (deletes its timer or tasklet), else returns 0 */ static int stop_queued_cmnd(struct scsi_cmnd *cmnd) { unsigned long iflags; - int k; + int k, qmax, r_qmax; struct sdebug_queued_cmd *sqcp; + struct sdebug_dev_info *devip; spin_lock_irqsave(&queued_arr_lock, iflags); - for (k = 0; k < scsi_debug_max_queue; ++k) { - sqcp = &queued_arr[k]; - if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) { - del_timer_sync(&sqcp->cmnd_timer); - sqcp->in_use = 0; - sqcp->a_cmnd = NULL; - break; + qmax = scsi_debug_max_queue; + r_qmax = atomic_read(&retired_max_queue); + if (r_qmax > qmax) + qmax = r_qmax; + for (k = 0; k < qmax; ++k) { + if (test_bit(k, queued_in_use_bm)) { + sqcp = &queued_arr[k]; + if (cmnd == sqcp->a_cmnd) { + if (scsi_debug_ndelay > 0) { + if (sqcp->sd_hrtp) + hrtimer_cancel( + &sqcp->sd_hrtp->hrt); + } else if (scsi_debug_delay > 0) { + if (sqcp->cmnd_timerp) + del_timer_sync( + sqcp->cmnd_timerp); + } else if (scsi_debug_delay < 0) { + if (sqcp->tletp) + tasklet_kill(sqcp->tletp); + } + __clear_bit(k, queued_in_use_bm); + devip = (struct sdebug_dev_info *) + cmnd->device->hostdata; + if (devip) + atomic_dec(&devip->num_in_q); + sqcp->a_cmnd = NULL; + break; + } } } spin_unlock_irqrestore(&queued_arr_lock, iflags); - return (k < scsi_debug_max_queue) ? 1 : 0; + return (k < qmax) ? 1 : 0; } -/* Deletes (stops) timers of all queued commands */ +/* Deletes (stops) timers or tasklets of all queued commands */ static void stop_all_queued(void) { unsigned long iflags; int k; struct sdebug_queued_cmd *sqcp; + struct sdebug_dev_info *devip; spin_lock_irqsave(&queued_arr_lock, iflags); - for (k = 0; k < scsi_debug_max_queue; ++k) { - sqcp = &queued_arr[k]; - if (sqcp->in_use && sqcp->a_cmnd) { - del_timer_sync(&sqcp->cmnd_timer); - sqcp->in_use = 0; - sqcp->a_cmnd = NULL; + for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { + if (test_bit(k, queued_in_use_bm)) { + sqcp = &queued_arr[k]; + if (sqcp->a_cmnd) { + if (scsi_debug_ndelay > 0) { + if (sqcp->sd_hrtp) + hrtimer_cancel( + &sqcp->sd_hrtp->hrt); + } else if (scsi_debug_delay > 0) { + if (sqcp->cmnd_timerp) + del_timer_sync( + sqcp->cmnd_timerp); + } else if (scsi_debug_delay < 0) { + if (sqcp->tletp) + tasklet_kill(sqcp->tletp); + } + __clear_bit(k, queued_in_use_bm); + devip = (struct sdebug_dev_info *) + sqcp->a_cmnd->device->hostdata; + if (devip) + atomic_dec(&devip->num_in_q); + sqcp->a_cmnd = NULL; + } } } spin_unlock_irqrestore(&queued_arr_lock, iflags); } -static int scsi_debug_abort(struct scsi_cmnd * SCpnt) +/* Free queued command memory on heap */ +static void free_all_queued(void) { - if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) - printk(KERN_INFO "scsi_debug: abort\n"); - ++num_aborts; - stop_queued_cmnd(SCpnt); - return SUCCESS; + unsigned long iflags; + int k; + struct sdebug_queued_cmd *sqcp; + + spin_lock_irqsave(&queued_arr_lock, iflags); + for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { + sqcp = &queued_arr[k]; + kfree(sqcp->cmnd_timerp); + sqcp->cmnd_timerp = NULL; + kfree(sqcp->tletp); + sqcp->tletp = NULL; + kfree(sqcp->sd_hrtp); + sqcp->sd_hrtp = NULL; + } + spin_unlock_irqrestore(&queued_arr_lock, iflags); } -static int scsi_debug_biosparam(struct scsi_device *sdev, - struct block_device * bdev, sector_t capacity, int *info) +static int scsi_debug_abort(struct scsi_cmnd *SCpnt) { - int res; - unsigned char *buf; - - if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) - printk(KERN_INFO "scsi_debug: biosparam\n"); - buf = scsi_bios_ptable(bdev); - if (buf) { - res = scsi_partsize(buf, capacity, - &info[2], &info[0], &info[1]); - kfree(buf); - if (! res) - return res; - } - info[0] = sdebug_heads; - info[1] = sdebug_sectors_per; - info[2] = sdebug_cylinders_per; - return 0; + ++num_aborts; + if (SCpnt) { + if (SCpnt->device && + (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)) + sdev_printk(KERN_INFO, SCpnt->device, "%s\n", + __func__); + stop_queued_cmnd(SCpnt); + } + return SUCCESS; } static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt) { struct sdebug_dev_info * devip; - if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) - printk(KERN_INFO "scsi_debug: device_reset\n"); ++num_dev_resets; - if (SCpnt) { - devip = devInfoReg(SCpnt->device); + if (SCpnt && SCpnt->device) { + struct scsi_device *sdp = SCpnt->device; + + if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts) + sdev_printk(KERN_INFO, sdp, "%s\n", __func__); + devip = devInfoReg(sdp); if (devip) - devip->reset = 1; + set_bit(SDEBUG_UA_POR, devip->uas_bm); + } + return SUCCESS; +} + +static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt) +{ + struct sdebug_host_info *sdbg_host; + struct sdebug_dev_info *devip; + struct scsi_device *sdp; + struct Scsi_Host *hp; + int k = 0; + + ++num_target_resets; + if (!SCpnt) + goto lie; + sdp = SCpnt->device; + if (!sdp) + goto lie; + if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts) + sdev_printk(KERN_INFO, sdp, "%s\n", __func__); + hp = sdp->host; + if (!hp) + goto lie; + sdbg_host = *(struct sdebug_host_info **)shost_priv(hp); + if (sdbg_host) { + list_for_each_entry(devip, + &sdbg_host->dev_info_list, + dev_list) + if (devip->target == sdp->id) { + set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); + ++k; + } } + if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts) + sdev_printk(KERN_INFO, sdp, + "%s: %d device(s) found in target\n", __func__, k); +lie: return SUCCESS; } static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt) { struct sdebug_host_info *sdbg_host; - struct sdebug_dev_info * dev_info; + struct sdebug_dev_info *devip; struct scsi_device * sdp; struct Scsi_Host * hp; + int k = 0; - if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) - printk(KERN_INFO "scsi_debug: bus_reset\n"); ++num_bus_resets; - if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) { + if (!(SCpnt && SCpnt->device)) + goto lie; + sdp = SCpnt->device; + if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts) + sdev_printk(KERN_INFO, sdp, "%s\n", __func__); + hp = sdp->host; + if (hp) { sdbg_host = *(struct sdebug_host_info **)shost_priv(hp); if (sdbg_host) { - list_for_each_entry(dev_info, + list_for_each_entry(devip, &sdbg_host->dev_info_list, - dev_list) - dev_info->reset = 1; + dev_list) { + set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); + ++k; + } } } + if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts) + sdev_printk(KERN_INFO, sdp, + "%s: %d device(s) found in host\n", __func__, k); +lie: return SUCCESS; } static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt) { struct sdebug_host_info * sdbg_host; - struct sdebug_dev_info * dev_info; + struct sdebug_dev_info *devip; + int k = 0; - if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) - printk(KERN_INFO "scsi_debug: host_reset\n"); ++num_host_resets; + if ((SCpnt->device) && (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)) + sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__); spin_lock(&sdebug_host_list_lock); list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { - list_for_each_entry(dev_info, &sdbg_host->dev_info_list, - dev_list) - dev_info->reset = 1; + list_for_each_entry(devip, &sdbg_host->dev_info_list, + dev_list) { + set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); + ++k; + } } spin_unlock(&sdebug_host_list_lock); stop_all_queued(); + if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts) + sdev_printk(KERN_INFO, SCpnt->device, + "%s: %d device(s) found\n", __func__, k); return SUCCESS; } -/* Initializes timers in queued array */ -static void __init init_all_queued(void) -{ - unsigned long iflags; - int k; - struct sdebug_queued_cmd * sqcp; - - spin_lock_irqsave(&queued_arr_lock, iflags); - for (k = 0; k < scsi_debug_max_queue; ++k) { - sqcp = &queued_arr[k]; - init_timer(&sqcp->cmnd_timer); - sqcp->in_use = 0; - sqcp->a_cmnd = NULL; - } - spin_unlock_irqrestore(&queued_arr_lock, iflags); -} - static void __init sdebug_build_parts(unsigned char *ramp, unsigned long store_size) { @@ -2662,8 +2963,8 @@ static void __init sdebug_build_parts(unsigned char *ramp, return; if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) { scsi_debug_num_parts = SDEBUG_MAX_PARTS; - printk(KERN_WARNING "scsi_debug:build_parts: reducing " - "partitions to %d\n", SDEBUG_MAX_PARTS); + pr_warn("%s: reducing partitions to %d\n", __func__, + SDEBUG_MAX_PARTS); } num_sectors = (int)sdebug_store_sectors; sectors_per_part = (num_sectors - sdebug_sectors_per) @@ -2700,62 +3001,130 @@ static void __init sdebug_build_parts(unsigned char *ramp, } } -static int schedule_resp(struct scsi_cmnd * cmnd, - struct sdebug_dev_info * devip, - done_funct_t done, int scsi_result, int delta_jiff) +static int +schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip, + int scsi_result, int delta_jiff) { - if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) { - if (scsi_result) { - struct scsi_device * sdp = cmnd->device; + unsigned long iflags; + int k, num_in_q, tsf, qdepth, inject; + struct sdebug_queued_cmd *sqcp = NULL; + struct scsi_device *sdp = cmnd->device; + + if (NULL == cmnd || NULL == devip) { + pr_warn("%s: called with NULL cmnd or devip pointer\n", + __func__); + /* no particularly good error to report back */ + return SCSI_MLQUEUE_HOST_BUSY; + } + if ((scsi_result) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) + sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n", + __func__, scsi_result); + if (delta_jiff == 0) { + /* using same thread to call back mid-layer */ + cmnd->result = scsi_result; + cmnd->scsi_done(cmnd); + return 0; + } - printk(KERN_INFO "scsi_debug: <%u %u %u %u> " - "non-zero result=0x%x\n", sdp->host->host_no, - sdp->channel, sdp->id, sdp->lun, scsi_result); + /* deferred response cases */ + spin_lock_irqsave(&queued_arr_lock, iflags); + num_in_q = atomic_read(&devip->num_in_q); + qdepth = cmnd->device->queue_depth; + k = find_first_zero_bit(queued_in_use_bm, scsi_debug_max_queue); + tsf = 0; + inject = 0; + if ((qdepth > 0) && (num_in_q >= qdepth)) + tsf = 1; + else if ((scsi_debug_every_nth != 0) && + (SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts)) { + if ((num_in_q == (qdepth - 1)) && + (atomic_inc_return(&sdebug_a_tsf) >= + abs(scsi_debug_every_nth))) { + atomic_set(&sdebug_a_tsf, 0); + inject = 1; + tsf = 1; } } - if (cmnd && devip) { - /* simulate autosense by this driver */ - if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff)) - memcpy(cmnd->sense_buffer, devip->sense_buff, - (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ? - SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE); - } - if (delta_jiff <= 0) { - if (cmnd) - cmnd->result = scsi_result; - if (done) - done(cmnd); - return 0; - } else { - unsigned long iflags; - int k; - struct sdebug_queued_cmd * sqcp = NULL; - spin_lock_irqsave(&queued_arr_lock, iflags); - for (k = 0; k < scsi_debug_max_queue; ++k) { - sqcp = &queued_arr[k]; - if (! sqcp->in_use) - break; + /* if (tsf) simulate device reporting SCSI status of TASK SET FULL. + * Might override existing CHECK CONDITION. */ + if (tsf) + scsi_result = device_qfull_result; + if (k >= scsi_debug_max_queue) { + if (SCSI_DEBUG_OPT_ALL_TSF & scsi_debug_opts) + tsf = 1; + spin_unlock_irqrestore(&queued_arr_lock, iflags); + if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) + sdev_printk(KERN_INFO, sdp, + "%s: num_in_q=%d, bypass q, %s%s\n", + __func__, num_in_q, + (inject ? "<inject> " : ""), + (tsf ? "status: TASK SET FULL" : + "report: host busy")); + if (tsf) { + /* queued_arr full so respond in same thread */ + cmnd->result = scsi_result; + cmnd->scsi_done(cmnd); + /* As scsi_done() is called "inline" must return 0 */ + return 0; + } else + return SCSI_MLQUEUE_HOST_BUSY; + } + __set_bit(k, queued_in_use_bm); + atomic_inc(&devip->num_in_q); + sqcp = &queued_arr[k]; + sqcp->a_cmnd = cmnd; + cmnd->result = scsi_result; + spin_unlock_irqrestore(&queued_arr_lock, iflags); + if (delta_jiff > 0) { + if (NULL == sqcp->cmnd_timerp) { + sqcp->cmnd_timerp = kmalloc(sizeof(struct timer_list), + GFP_ATOMIC); + if (NULL == sqcp->cmnd_timerp) + return SCSI_MLQUEUE_HOST_BUSY; + init_timer(sqcp->cmnd_timerp); } - if (k >= scsi_debug_max_queue) { - spin_unlock_irqrestore(&queued_arr_lock, iflags); - printk(KERN_WARNING "scsi_debug: can_queue exceeded\n"); - return 1; /* report busy to mid level */ + sqcp->cmnd_timerp->function = sdebug_q_cmd_complete; + sqcp->cmnd_timerp->data = k; + sqcp->cmnd_timerp->expires = get_jiffies_64() + delta_jiff; + add_timer(sqcp->cmnd_timerp); + } else if (scsi_debug_ndelay > 0) { + ktime_t kt = ktime_set(0, scsi_debug_ndelay); + struct sdebug_hrtimer *sd_hp = sqcp->sd_hrtp; + + if (NULL == sd_hp) { + sd_hp = kmalloc(sizeof(*sd_hp), GFP_ATOMIC); + if (NULL == sd_hp) + return SCSI_MLQUEUE_HOST_BUSY; + sqcp->sd_hrtp = sd_hp; + hrtimer_init(&sd_hp->hrt, CLOCK_MONOTONIC, + HRTIMER_MODE_REL); + sd_hp->hrt.function = sdebug_q_cmd_hrt_complete; + sd_hp->qa_indx = k; } - sqcp->in_use = 1; - sqcp->a_cmnd = cmnd; - sqcp->scsi_result = scsi_result; - sqcp->done_funct = done; - sqcp->cmnd_timer.function = timer_intr_handler; - sqcp->cmnd_timer.data = k; - sqcp->cmnd_timer.expires = jiffies + delta_jiff; - add_timer(&sqcp->cmnd_timer); - spin_unlock_irqrestore(&queued_arr_lock, iflags); - if (cmnd) - cmnd->result = 0; - return 0; + hrtimer_start(&sd_hp->hrt, kt, HRTIMER_MODE_REL); + } else { /* delay < 0 */ + if (NULL == sqcp->tletp) { + sqcp->tletp = kmalloc(sizeof(*sqcp->tletp), + GFP_ATOMIC); + if (NULL == sqcp->tletp) + return SCSI_MLQUEUE_HOST_BUSY; + tasklet_init(sqcp->tletp, + sdebug_q_cmd_complete, k); + } + if (-1 == delta_jiff) + tasklet_hi_schedule(sqcp->tletp); + else + tasklet_schedule(sqcp->tletp); } + if (tsf && (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts)) + sdev_printk(KERN_INFO, sdp, + "%s: num_in_q=%d +1, %s%s\n", __func__, + num_in_q, (inject ? "<inject> " : ""), + "status: TASK SET FULL"); + return 0; } + /* Note: The following macros create attribute files in the /sys/module/scsi_debug/parameters directory. Unfortunately this driver is unaware of a change and cannot trigger auxiliary actions @@ -2773,6 +3142,7 @@ module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR); module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR); module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR); module_param_named(guard, scsi_debug_guard, uint, S_IRUGO); +module_param_named(host_lock, scsi_debug_host_lock, bool, S_IRUGO | S_IWUSR); module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO); module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO); module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO); @@ -2780,6 +3150,7 @@ module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO); module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO); module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR); module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR); +module_param_named(ndelay, scsi_debug_ndelay, int, S_IRUGO | S_IWUSR); module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR); module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO); module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO); @@ -2809,7 +3180,7 @@ MODULE_VERSION(SCSI_DEBUG_VERSION); MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)"); MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)"); MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)"); -MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)"); +MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny"); MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)"); MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)"); MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)"); @@ -2817,13 +3188,15 @@ MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)"); MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)"); MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)"); MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)"); +MODULE_PARM_DESC(host_lock, "use host_lock around all commands (def=0)"); MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)"); MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)"); MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)"); MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)"); MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)"); MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)"); -MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to 255(def))"); +MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))"); +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_uld, "stop ULD (e.g. sd driver) attaching (def=0))"); MODULE_PARM_DESC(num_parts, "number of partitions(def=0)"); @@ -2854,9 +3227,7 @@ static const char * scsi_debug_info(struct Scsi_Host * shp) return sdebug_info; } -/* scsi_debug_proc_info - * Used if the driver currently has no own support for /proc/scsi - */ +/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */ static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length) { char arr[16]; @@ -2871,27 +3242,49 @@ static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int lengt return -EINVAL; scsi_debug_opts = opts; if (scsi_debug_every_nth != 0) - scsi_debug_cmnd_count = 0; + atomic_set(&sdebug_cmnd_count, 0); return length; } +/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the + * same for each scsi_debug host (if more than one). Some of the counters + * output are not atomics so might be inaccurate in a busy system. */ static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host) { - seq_printf(m, "scsi_debug adapter driver, version " - "%s [%s]\n" - "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, " - "every_nth=%d(curr:%d)\n" - "delay=%d, max_luns=%d, scsi_level=%d\n" - "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n" - "number of aborts=%d, device_reset=%d, bus_resets=%d, " - "host_resets=%d\ndix_reads=%d dix_writes=%d dif_errors=%d\n", - SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts, - scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth, - scsi_debug_cmnd_count, scsi_debug_delay, - scsi_debug_max_luns, scsi_debug_scsi_level, - scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads, - sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets, - num_host_resets, dix_reads, dix_writes, dif_errors); + int f, l; + char b[32]; + + if (scsi_debug_every_nth > 0) + snprintf(b, sizeof(b), " (curr:%d)", + ((SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) ? + atomic_read(&sdebug_a_tsf) : + atomic_read(&sdebug_cmnd_count))); + else + b[0] = '\0'; + + seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n" + "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, " + "every_nth=%d%s\n" + "delay=%d, ndelay=%d, max_luns=%d, q_completions=%d\n" + "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n" + "command aborts=%d; RESETs: device=%d, target=%d, bus=%d, " + "host=%d\ndix_reads=%d dix_writes=%d dif_errors=%d " + "usec_in_jiffy=%lu\n", + SCSI_DEBUG_VERSION, scsi_debug_version_date, + scsi_debug_num_tgts, scsi_debug_dev_size_mb, scsi_debug_opts, + scsi_debug_every_nth, b, scsi_debug_delay, scsi_debug_ndelay, + scsi_debug_max_luns, atomic_read(&sdebug_completions), + scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads, + sdebug_sectors_per, num_aborts, num_dev_resets, + num_target_resets, num_bus_resets, num_host_resets, + dix_reads, dix_writes, dif_errors, TICK_NSEC / 1000); + + f = find_first_bit(queued_in_use_bm, scsi_debug_max_queue); + if (f != scsi_debug_max_queue) { + l = find_last_bit(queued_in_use_bm, scsi_debug_max_queue); + seq_printf(m, " %s BUSY: first,last bits set: %d,%d\n", + "queued_in_use_bm", f, l); + } return 0; } @@ -2899,23 +3292,69 @@ static ssize_t delay_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay); } - +/* Returns -EBUSY if delay is being changed and commands are queued */ static ssize_t delay_store(struct device_driver *ddp, const char *buf, size_t count) { - int delay; - char work[20]; - - if (1 == sscanf(buf, "%10s", work)) { - if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) { - scsi_debug_delay = delay; - return count; + int delay, res; + + if ((count > 0) && (1 == sscanf(buf, "%d", &delay))) { + res = count; + if (scsi_debug_delay != delay) { + unsigned long iflags; + int k; + + spin_lock_irqsave(&queued_arr_lock, iflags); + k = find_first_bit(queued_in_use_bm, + scsi_debug_max_queue); + if (k != scsi_debug_max_queue) + res = -EBUSY; /* have queued commands */ + else { + scsi_debug_delay = delay; + scsi_debug_ndelay = 0; + } + spin_unlock_irqrestore(&queued_arr_lock, iflags); } + return res; } return -EINVAL; } static DRIVER_ATTR_RW(delay); +static ssize_t ndelay_show(struct device_driver *ddp, char *buf) +{ + return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ndelay); +} +/* Returns -EBUSY if ndelay is being changed and commands are queued */ +/* If > 0 and accepted then scsi_debug_delay is set to DELAY_OVERRIDDEN */ +static ssize_t ndelay_store(struct device_driver *ddp, const char *buf, + size_t count) +{ + unsigned long iflags; + int ndelay, res, k; + + if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) && + (ndelay >= 0) && (ndelay < 1000000000)) { + res = count; + if (scsi_debug_ndelay != ndelay) { + spin_lock_irqsave(&queued_arr_lock, iflags); + k = find_first_bit(queued_in_use_bm, + scsi_debug_max_queue); + if (k != scsi_debug_max_queue) + res = -EBUSY; /* have queued commands */ + else { + scsi_debug_ndelay = ndelay; + scsi_debug_delay = ndelay ? DELAY_OVERRIDDEN + : DEF_DELAY; + } + spin_unlock_irqrestore(&queued_arr_lock, iflags); + } + return res; + } + return -EINVAL; +} +static DRIVER_ATTR_RW(ndelay); + static ssize_t opts_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts); @@ -2939,7 +3378,8 @@ static ssize_t opts_store(struct device_driver *ddp, const char *buf, return -EINVAL; opts_done: scsi_debug_opts = opts; - scsi_debug_cmnd_count = 0; + atomic_set(&sdebug_cmnd_count, 0); + atomic_set(&sdebug_a_tsf, 0); return count; } static DRIVER_ATTR_RW(opts); @@ -2988,7 +3428,24 @@ static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf, int n; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { - scsi_debug_fake_rw = n; + n = (n > 0); + scsi_debug_fake_rw = (scsi_debug_fake_rw > 0); + if (scsi_debug_fake_rw != n) { + if ((0 == n) && (NULL == fake_storep)) { + unsigned long sz = + (unsigned long)scsi_debug_dev_size_mb * + 1048576; + + fake_storep = vmalloc(sz); + if (NULL == fake_storep) { + pr_err("%s: out of memory, 9\n", + __func__); + return -ENOMEM; + } + memset(fake_storep, 0, sz); + } + scsi_debug_fake_rw = n; + } return count; } return -EINVAL; @@ -3053,7 +3510,7 @@ static ssize_t every_nth_store(struct device_driver *ddp, const char *buf, if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) { scsi_debug_every_nth = nth; - scsi_debug_cmnd_count = 0; + atomic_set(&sdebug_cmnd_count, 0); return count; } return -EINVAL; @@ -3082,14 +3539,26 @@ static ssize_t max_queue_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue); } +/* N.B. max_queue can be changed while there are queued commands. In flight + * commands beyond the new max_queue will be completed. */ static ssize_t max_queue_store(struct device_driver *ddp, const char *buf, size_t count) { - int n; + unsigned long iflags; + int n, k; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) && (n <= SCSI_DEBUG_CANQUEUE)) { + spin_lock_irqsave(&queued_arr_lock, iflags); + k = find_last_bit(queued_in_use_bm, SCSI_DEBUG_CANQUEUE); scsi_debug_max_queue = n; + if (SCSI_DEBUG_CANQUEUE == k) + atomic_set(&retired_max_queue, 0); + else if (k >= n) + atomic_set(&retired_max_queue, k + 1); + else + atomic_set(&retired_max_queue, 0); + spin_unlock_irqrestore(&queued_arr_lock, iflags); return count; } return -EINVAL; @@ -3234,6 +3703,40 @@ static ssize_t removable_store(struct device_driver *ddp, const char *buf, } static DRIVER_ATTR_RW(removable); +static ssize_t host_lock_show(struct device_driver *ddp, char *buf) +{ + return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_host_lock); +} +/* Returns -EBUSY if host_lock is being changed and commands are queued */ +static ssize_t host_lock_store(struct device_driver *ddp, const char *buf, + size_t count) +{ + int n, res; + + if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { + bool new_host_lock = (n > 0); + + res = count; + if (new_host_lock != scsi_debug_host_lock) { + unsigned long iflags; + int k; + + spin_lock_irqsave(&queued_arr_lock, iflags); + k = find_first_bit(queued_in_use_bm, + scsi_debug_max_queue); + if (k != scsi_debug_max_queue) + res = -EBUSY; /* have queued commands */ + else + scsi_debug_host_lock = new_host_lock; + spin_unlock_irqrestore(&queued_arr_lock, iflags); + } + return res; + } + return -EINVAL; +} +static DRIVER_ATTR_RW(host_lock); + + /* Note: The following array creates attribute files in the /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these files (over those found in the /sys/module/scsi_debug/parameters @@ -3266,6 +3769,8 @@ static struct attribute *sdebug_drv_attrs[] = { &driver_attr_ato.attr, &driver_attr_map.attr, &driver_attr_removable.attr, + &driver_attr_host_lock.attr, + &driver_attr_ndelay.attr, NULL, }; ATTRIBUTE_GROUPS(sdebug_drv); @@ -3279,6 +3784,17 @@ static int __init scsi_debug_init(void) int k; int ret; + atomic_set(&sdebug_cmnd_count, 0); + atomic_set(&sdebug_completions, 0); + atomic_set(&retired_max_queue, 0); + + if (scsi_debug_ndelay >= 1000000000) { + pr_warn("%s: ndelay must be less than 1 second, ignored\n", + __func__); + scsi_debug_ndelay = 0; + } else if (scsi_debug_ndelay > 0) + scsi_debug_delay = DELAY_OVERRIDDEN; + switch (scsi_debug_sector_size) { case 512: case 1024: @@ -3286,7 +3802,7 @@ static int __init scsi_debug_init(void) case 4096: break; default: - printk(KERN_ERR "scsi_debug_init: invalid sector_size %d\n", + pr_err("%s: invalid sector_size %d\n", __func__, scsi_debug_sector_size); return -EINVAL; } @@ -3300,28 +3816,28 @@ static int __init scsi_debug_init(void) break; default: - printk(KERN_ERR "scsi_debug_init: dif must be 0, 1, 2 or 3\n"); + pr_err("%s: dif must be 0, 1, 2 or 3\n", __func__); return -EINVAL; } if (scsi_debug_guard > 1) { - printk(KERN_ERR "scsi_debug_init: guard must be 0 or 1\n"); + pr_err("%s: guard must be 0 or 1\n", __func__); return -EINVAL; } if (scsi_debug_ato > 1) { - printk(KERN_ERR "scsi_debug_init: ato must be 0 or 1\n"); + pr_err("%s: ato must be 0 or 1\n", __func__); return -EINVAL; } if (scsi_debug_physblk_exp > 15) { - printk(KERN_ERR "scsi_debug_init: invalid physblk_exp %u\n", + pr_err("%s: invalid physblk_exp %u\n", __func__, scsi_debug_physblk_exp); return -EINVAL; } if (scsi_debug_lowest_aligned > 0x3fff) { - printk(KERN_ERR "scsi_debug_init: lowest_aligned too big: %u\n", + pr_err("%s: lowest_aligned too big: %u\n", __func__, scsi_debug_lowest_aligned); return -EINVAL; } @@ -3349,14 +3865,16 @@ static int __init scsi_debug_init(void) (sdebug_sectors_per * sdebug_heads); } - fake_storep = vmalloc(sz); - if (NULL == fake_storep) { - printk(KERN_ERR "scsi_debug_init: out of memory, 1\n"); - return -ENOMEM; + if (0 == scsi_debug_fake_rw) { + fake_storep = vmalloc(sz); + if (NULL == fake_storep) { + pr_err("%s: out of memory, 1\n", __func__); + return -ENOMEM; + } + memset(fake_storep, 0, sz); + if (scsi_debug_num_parts > 0) + sdebug_build_parts(fake_storep, sz); } - memset(fake_storep, 0, sz); - if (scsi_debug_num_parts > 0) - sdebug_build_parts(fake_storep, sz); if (scsi_debug_dix) { int dif_size; @@ -3364,11 +3882,11 @@ static int __init scsi_debug_init(void) dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple); dif_storep = vmalloc(dif_size); - printk(KERN_ERR "scsi_debug_init: dif_storep %u bytes @ %p\n", - dif_size, dif_storep); + pr_err("%s: dif_storep %u bytes @ %p\n", __func__, dif_size, + dif_storep); if (dif_storep == NULL) { - printk(KERN_ERR "scsi_debug_init: out of mem. (DIX)\n"); + pr_err("%s: out of mem. (DIX)\n", __func__); ret = -ENOMEM; goto free_vm; } @@ -3390,8 +3908,7 @@ static int __init scsi_debug_init(void) if (scsi_debug_unmap_alignment && scsi_debug_unmap_granularity <= scsi_debug_unmap_alignment) { - printk(KERN_ERR - "%s: ERR: unmap_granularity <= unmap_alignment\n", + pr_err("%s: ERR: unmap_granularity <= unmap_alignment\n", __func__); return -EINVAL; } @@ -3399,11 +3916,10 @@ static int __init scsi_debug_init(void) map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1; map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long)); - printk(KERN_INFO "scsi_debug_init: %lu provisioning blocks\n", - map_size); + pr_info("%s: %lu provisioning blocks\n", __func__, map_size); if (map_storep == NULL) { - printk(KERN_ERR "scsi_debug_init: out of mem. (MAP)\n"); + pr_err("%s: out of mem. (MAP)\n", __func__); ret = -ENOMEM; goto free_vm; } @@ -3417,39 +3933,35 @@ static int __init scsi_debug_init(void) pseudo_primary = root_device_register("pseudo_0"); if (IS_ERR(pseudo_primary)) { - printk(KERN_WARNING "scsi_debug: root_device_register() error\n"); + pr_warn("%s: root_device_register() error\n", __func__); ret = PTR_ERR(pseudo_primary); goto free_vm; } ret = bus_register(&pseudo_lld_bus); if (ret < 0) { - printk(KERN_WARNING "scsi_debug: bus_register error: %d\n", - ret); + pr_warn("%s: bus_register error: %d\n", __func__, ret); goto dev_unreg; } ret = driver_register(&sdebug_driverfs_driver); if (ret < 0) { - printk(KERN_WARNING "scsi_debug: driver_register error: %d\n", - ret); + pr_warn("%s: driver_register error: %d\n", __func__, ret); goto bus_unreg; } - init_all_queued(); - host_to_add = scsi_debug_add_host; scsi_debug_add_host = 0; for (k = 0; k < host_to_add; k++) { if (sdebug_add_adapter()) { - printk(KERN_ERR "scsi_debug_init: " - "sdebug_add_adapter failed k=%d\n", k); + pr_err("%s: sdebug_add_adapter failed k=%d\n", + __func__, k); break; } } if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { - printk(KERN_INFO "scsi_debug_init: built %d host(s)\n", - scsi_debug_add_host); + pr_info("%s: built %d host(s)\n", __func__, + scsi_debug_add_host); } return 0; @@ -3472,6 +3984,7 @@ static void __exit scsi_debug_exit(void) int k = scsi_debug_add_host; stop_all_queued(); + free_all_queued(); for (; k; k--) sdebug_remove_adapter(); driver_unregister(&sdebug_driverfs_driver); @@ -3569,8 +4082,8 @@ static void sdebug_remove_adapter(void) --scsi_debug_add_host; } -static -int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done) +static int +scsi_debug_queuecommand(struct scsi_cmnd *SCpnt) { unsigned char *cmd = (unsigned char *) SCpnt->cmnd; int len, k; @@ -3589,32 +4102,34 @@ int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done) int unmap = 0; scsi_set_resid(SCpnt, 0); - if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) { - printk(KERN_INFO "scsi_debug: cmd "); - for (k = 0, len = SCpnt->cmd_len; k < len; ++k) - printk("%02x ", (int)cmd[k]); - printk("\n"); - } - - if (target == SCpnt->device->host->hostt->this_id) { - printk(KERN_INFO "scsi_debug: initiator's id used as " - "target!\n"); - return schedule_resp(SCpnt, NULL, done, - DID_NO_CONNECT << 16, 0); + if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && + !(SCSI_DEBUG_OPT_NO_CDB_NOISE & scsi_debug_opts) && cmd) { + char b[120]; + int n; + + len = SCpnt->cmd_len; + if (len > 32) + strcpy(b, "too long, over 32 bytes"); + else { + for (k = 0, n = 0; k < len; ++k) + n += scnprintf(b + n, sizeof(b) - n, "%02x ", + (unsigned int)cmd[k]); + } + sdev_printk(KERN_INFO, SCpnt->device, "%s: cmd %s\n", my_name, + b); } if ((SCpnt->device->lun >= scsi_debug_max_luns) && (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS)) - return schedule_resp(SCpnt, NULL, done, - DID_NO_CONNECT << 16, 0); + return schedule_resp(SCpnt, NULL, DID_NO_CONNECT << 16, 0); devip = devInfoReg(SCpnt->device); if (NULL == devip) - return schedule_resp(SCpnt, NULL, done, - DID_NO_CONNECT << 16, 0); + return schedule_resp(SCpnt, NULL, DID_NO_CONNECT << 16, 0); if ((scsi_debug_every_nth != 0) && - (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) { - scsi_debug_cmnd_count = 0; + (atomic_inc_return(&sdebug_cmnd_count) >= + abs(scsi_debug_every_nth))) { + atomic_set(&sdebug_cmnd_count, 0); if (scsi_debug_every_nth < -1) scsi_debug_every_nth = -1; if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts) @@ -3645,11 +4160,10 @@ int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done) if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: Opcode: 0x%x " "not supported for wlun\n", *cmd); - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_OPCODE, 0); errsts = check_condition_result; - return schedule_resp(SCpnt, devip, done, errsts, - 0); + return schedule_resp(SCpnt, devip, errsts, 0); } } @@ -3667,7 +4181,7 @@ int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done) errsts = resp_start_stop(SCpnt, devip); break; case ALLOW_MEDIUM_REMOVAL: - errsts = check_readiness(SCpnt, 1, devip); + errsts = check_readiness(SCpnt, UAS_ONLY, devip); if (errsts) break; if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) @@ -3675,23 +4189,23 @@ int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done) cmd[4] ? "inhibited" : "enabled"); break; case SEND_DIAGNOSTIC: /* mandatory */ - errsts = check_readiness(SCpnt, 1, devip); + errsts = check_readiness(SCpnt, UAS_ONLY, devip); break; case TEST_UNIT_READY: /* mandatory */ - delay_override = 1; - errsts = check_readiness(SCpnt, 0, devip); + /* delay_override = 1; */ + errsts = check_readiness(SCpnt, UAS_TUR, devip); break; case RESERVE: - errsts = check_readiness(SCpnt, 1, devip); + errsts = check_readiness(SCpnt, UAS_ONLY, devip); break; case RESERVE_10: - errsts = check_readiness(SCpnt, 1, devip); + errsts = check_readiness(SCpnt, UAS_ONLY, devip); break; case RELEASE: - errsts = check_readiness(SCpnt, 1, devip); + errsts = check_readiness(SCpnt, UAS_ONLY, devip); break; case RELEASE_10: - errsts = check_readiness(SCpnt, 1, devip); + errsts = check_readiness(SCpnt, UAS_ONLY, devip); break; case READ_CAPACITY: errsts = resp_readcap(SCpnt, devip); @@ -3702,20 +4216,20 @@ int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done) else if (cmd[1] == SAI_GET_LBA_STATUS) { if (scsi_debug_lbp() == 0) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_COMMAND_OPCODE, 0); errsts = check_condition_result; } else errsts = resp_get_lba_status(SCpnt, devip); } else { - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_OPCODE, 0); errsts = check_condition_result; } break; case MAINTENANCE_IN: if (MI_REPORT_TARGET_PGS != cmd[1]) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_OPCODE, 0); errsts = check_condition_result; break; @@ -3728,7 +4242,7 @@ int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done) /* READ{10,12,16} and DIF Type 2 are natural enemies */ if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && cmd[1] & 0xe0) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_COMMAND_OPCODE, 0); errsts = check_condition_result; break; @@ -3742,7 +4256,7 @@ int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done) /* fall through */ case READ_6: read: - errsts = check_readiness(SCpnt, 0, devip); + errsts = check_readiness(SCpnt, UAS_TUR, devip); if (errsts) break; if (scsi_debug_fake_rw) @@ -3752,20 +4266,21 @@ read: if (inj_short) num /= 2; - errsts = resp_read(SCpnt, lba, num, devip, ei_lba); + errsts = resp_read(SCpnt, lba, num, ei_lba); if (inj_recovered && (0 == errsts)) { - mk_sense_buffer(devip, RECOVERED_ERROR, + mk_sense_buffer(SCpnt, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); errsts = check_condition_result; } else if (inj_transport && (0 == errsts)) { - mk_sense_buffer(devip, ABORTED_COMMAND, + mk_sense_buffer(SCpnt, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO); errsts = check_condition_result; } else if (inj_dif && (0 == errsts)) { - mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1); + /* Logical block guard check failed */ + mk_sense_buffer(SCpnt, ABORTED_COMMAND, 0x10, 1); errsts = illegal_condition_result; } else if (inj_dix && (0 == errsts)) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1); + mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, 0x10, 1); errsts = illegal_condition_result; } break; @@ -3774,7 +4289,7 @@ read: errsts = resp_report_luns(SCpnt, devip); break; case VERIFY: /* 10 byte SBC-2 command */ - errsts = check_readiness(SCpnt, 0, devip); + errsts = check_readiness(SCpnt, UAS_TUR, devip); break; case WRITE_16: case WRITE_12: @@ -3782,7 +4297,7 @@ read: /* WRITE{10,12,16} and DIF Type 2 are natural enemies */ if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && cmd[1] & 0xe0) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_COMMAND_OPCODE, 0); errsts = check_condition_result; break; @@ -3796,22 +4311,22 @@ read: /* fall through */ case WRITE_6: write: - errsts = check_readiness(SCpnt, 0, devip); + errsts = check_readiness(SCpnt, UAS_TUR, devip); if (errsts) break; if (scsi_debug_fake_rw) break; get_data_transfer_info(cmd, &lba, &num, &ei_lba); - errsts = resp_write(SCpnt, lba, num, devip, ei_lba); + errsts = resp_write(SCpnt, lba, num, ei_lba); if (inj_recovered && (0 == errsts)) { - mk_sense_buffer(devip, RECOVERED_ERROR, + mk_sense_buffer(SCpnt, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); errsts = check_condition_result; } else if (inj_dif && (0 == errsts)) { - mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1); + mk_sense_buffer(SCpnt, ABORTED_COMMAND, 0x10, 1); errsts = illegal_condition_result; } else if (inj_dix && (0 == errsts)) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1); + mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, 0x10, 1); errsts = illegal_condition_result; } break; @@ -3820,7 +4335,7 @@ write: if (cmd[1] & 0x8) { if ((*cmd == WRITE_SAME_16 && scsi_debug_lbpws == 0) || (*cmd == WRITE_SAME && scsi_debug_lbpws10 == 0)) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); errsts = check_condition_result; } else @@ -3828,19 +4343,23 @@ write: } if (errsts) break; - errsts = check_readiness(SCpnt, 0, devip); + errsts = check_readiness(SCpnt, UAS_TUR, devip); if (errsts) break; + if (scsi_debug_fake_rw) + break; get_data_transfer_info(cmd, &lba, &num, &ei_lba); - errsts = resp_write_same(SCpnt, lba, num, devip, ei_lba, unmap); + errsts = resp_write_same(SCpnt, lba, num, ei_lba, unmap); break; case UNMAP: - errsts = check_readiness(SCpnt, 0, devip); + errsts = check_readiness(SCpnt, UAS_TUR, devip); if (errsts) break; + if (scsi_debug_fake_rw) + break; if (scsi_debug_unmap_max_desc == 0 || scsi_debug_lbpu == 0) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_COMMAND_OPCODE, 0); errsts = check_condition_result; } else @@ -3861,29 +4380,29 @@ write: break; case SYNCHRONIZE_CACHE: delay_override = 1; - errsts = check_readiness(SCpnt, 0, devip); + errsts = check_readiness(SCpnt, UAS_TUR, devip); break; case WRITE_BUFFER: - errsts = check_readiness(SCpnt, 1, devip); + errsts = check_readiness(SCpnt, UAS_ONLY, devip); break; case XDWRITEREAD_10: if (!scsi_bidi_cmnd(SCpnt)) { - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); errsts = check_condition_result; break; } - errsts = check_readiness(SCpnt, 0, devip); + errsts = check_readiness(SCpnt, UAS_TUR, devip); if (errsts) break; if (scsi_debug_fake_rw) break; get_data_transfer_info(cmd, &lba, &num, &ei_lba); - errsts = resp_read(SCpnt, lba, num, devip, ei_lba); + errsts = resp_read(SCpnt, lba, num, ei_lba); if (errsts) break; - errsts = resp_write(SCpnt, lba, num, devip, ei_lba); + errsts = resp_write(SCpnt, lba, num, ei_lba); if (errsts) break; errsts = resp_xdwriteread(SCpnt, lba, num, devip); @@ -3906,27 +4425,138 @@ write: } } - mk_sense_buffer(devip, ILLEGAL_REQUEST, + mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); errsts = check_condition_result; break; - + case 0x85: + if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) + sdev_printk(KERN_INFO, SCpnt->device, + "%s: ATA PASS-THROUGH(16) not supported\n", my_name); + mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, + INVALID_OPCODE, 0); + errsts = check_condition_result; + break; default: if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) - printk(KERN_INFO "scsi_debug: Opcode: 0x%x not " - "supported\n", *cmd); - errsts = check_readiness(SCpnt, 1, devip); + sdev_printk(KERN_INFO, SCpnt->device, + "%s: Opcode: 0x%x not supported\n", + my_name, *cmd); + errsts = check_readiness(SCpnt, UAS_ONLY, devip); if (errsts) break; /* Unit attention takes precedence */ - mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0); + mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_OPCODE, 0); errsts = check_condition_result; break; } - return schedule_resp(SCpnt, devip, done, errsts, + return schedule_resp(SCpnt, devip, errsts, (delay_override ? 0 : scsi_debug_delay)); } -static DEF_SCSI_QCMD(scsi_debug_queuecommand) +static int +sdebug_queuecommand_lock_or_not(struct Scsi_Host *shost, struct scsi_cmnd *cmd) +{ + if (scsi_debug_host_lock) { + unsigned long iflags; + int rc; + + spin_lock_irqsave(shost->host_lock, iflags); + rc = scsi_debug_queuecommand(cmd); + spin_unlock_irqrestore(shost->host_lock, iflags); + return rc; + } else + return scsi_debug_queuecommand(cmd); +} + +static int +sdebug_change_qdepth(struct scsi_device *sdev, int qdepth, int reason) +{ + int num_in_q = 0; + int bad = 0; + unsigned long iflags; + struct sdebug_dev_info *devip; + + spin_lock_irqsave(&queued_arr_lock, iflags); + devip = (struct sdebug_dev_info *)sdev->hostdata; + if (NULL == devip) { + spin_unlock_irqrestore(&queued_arr_lock, iflags); + return -ENODEV; + } + num_in_q = atomic_read(&devip->num_in_q); + spin_unlock_irqrestore(&queued_arr_lock, iflags); + if (reason == SCSI_QDEPTH_DEFAULT || reason == SCSI_QDEPTH_RAMP_UP) { + if (qdepth < 1) + qdepth = 1; + /* allow to exceed max host queued_arr elements for testing */ + if (qdepth > SCSI_DEBUG_CANQUEUE + 10) + qdepth = SCSI_DEBUG_CANQUEUE + 10; + scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth); + } else if (reason == SCSI_QDEPTH_QFULL) + scsi_track_queue_full(sdev, qdepth); + else + bad = 1; + if (bad) + sdev_printk(KERN_WARNING, sdev, + "%s: unknown reason=0x%x\n", __func__, reason); + if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) { + if (SCSI_QDEPTH_QFULL == reason) + sdev_printk(KERN_INFO, sdev, + "%s: -> %d, num_in_q=%d, reason: queue full\n", + __func__, qdepth, num_in_q); + else { + const char *cp; + + switch (reason) { + case SCSI_QDEPTH_DEFAULT: + cp = "default (sysfs ?)"; + break; + case SCSI_QDEPTH_RAMP_UP: + cp = "ramp up"; + break; + default: + cp = "unknown"; + break; + } + sdev_printk(KERN_INFO, sdev, + "%s: qdepth=%d, num_in_q=%d, reason: %s\n", + __func__, qdepth, num_in_q, cp); + } + } + return sdev->queue_depth; +} + +static int +sdebug_change_qtype(struct scsi_device *sdev, int qtype) +{ + if (sdev->tagged_supported) { + scsi_set_tag_type(sdev, qtype); + if (qtype) + scsi_activate_tcq(sdev, sdev->queue_depth); + else + scsi_deactivate_tcq(sdev, sdev->queue_depth); + } else + qtype = 0; + if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) { + const char *cp; + + switch (qtype) { + case 0: + cp = "untagged"; + break; + case MSG_SIMPLE_TAG: + cp = "simple tags"; + break; + case MSG_ORDERED_TAG: + cp = "ordered tags"; + break; + default: + cp = "unknown"; + break; + } + sdev_printk(KERN_INFO, sdev, "%s: to %s\n", __func__, cp); + } + return qtype; +} static struct scsi_host_template sdebug_driver_template = { .show_info = scsi_debug_show_info, @@ -3938,17 +4568,19 @@ static struct scsi_host_template sdebug_driver_template = { .slave_configure = scsi_debug_slave_configure, .slave_destroy = scsi_debug_slave_destroy, .ioctl = scsi_debug_ioctl, - .queuecommand = scsi_debug_queuecommand, + .queuecommand = sdebug_queuecommand_lock_or_not, + .change_queue_depth = sdebug_change_qdepth, + .change_queue_type = sdebug_change_qtype, .eh_abort_handler = scsi_debug_abort, - .eh_bus_reset_handler = scsi_debug_bus_reset, .eh_device_reset_handler = scsi_debug_device_reset, + .eh_target_reset_handler = scsi_debug_target_reset, + .eh_bus_reset_handler = scsi_debug_bus_reset, .eh_host_reset_handler = scsi_debug_host_reset, - .bios_param = scsi_debug_biosparam, .can_queue = SCSI_DEBUG_CANQUEUE, .this_id = 7, - .sg_tablesize = 256, - .cmd_per_lun = 16, - .max_sectors = 0xffff, + .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS, + .cmd_per_lun = DEF_CMD_PER_LUN, + .max_sectors = -1U, .use_clustering = DISABLE_CLUSTERING, .module = THIS_MODULE, }; @@ -4032,8 +4664,7 @@ static int sdebug_driver_probe(struct device * dev) } else scsi_scan_host(hpnt); - - return error; + return error; } static int sdebug_driver_remove(struct device * dev) |