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Diffstat (limited to 'drivers/scsi/scsi_debug.c')
-rw-r--r--drivers/scsi/scsi_debug.c293
1 files changed, 225 insertions, 68 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 914d9c12e741..acf0592d63da 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -43,6 +43,7 @@
#include <linux/prefetch.h>
#include <linux/debugfs.h>
#include <linux/async.h>
+#include <linux/cleanup.h>
#include <net/checksum.h>
@@ -532,6 +533,8 @@ static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
+static int resp_get_stream_status(struct scsi_cmnd *scp,
+ struct sdebug_dev_info *devip);
static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
@@ -606,6 +609,9 @@ static const struct opcode_info_t sa_in_16_iarr[] = {
{0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
{16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */
+ {0, 0x9e, 0x16, F_SA_LOW | F_D_IN, resp_get_stream_status, NULL,
+ {16, 0x16, 0, 0, 0xff, 0xff, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff,
+ 0, 0} }, /* GET STREAM STATUS */
};
static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */
@@ -896,6 +902,8 @@ static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES;
static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
static int poll_queues; /* iouring iopoll interface.*/
+static atomic_long_t writes_by_group_number[64];
+
static char sdebug_proc_name[] = MY_NAME;
static const char *my_name = MY_NAME;
@@ -1867,6 +1875,19 @@ static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr)
return 0x3c;
}
+#define SDEBUG_BLE_LEN_AFTER_B4 28 /* thus vpage 32 bytes long */
+
+enum { MAXIMUM_NUMBER_OF_STREAMS = 6, PERMANENT_STREAM_COUNT = 5 };
+
+/* Block limits extension VPD page (SBC-4) */
+static int inquiry_vpd_b7(unsigned char *arrb4)
+{
+ memset(arrb4, 0, SDEBUG_BLE_LEN_AFTER_B4);
+ arrb4[1] = 1; /* Reduced stream control support (RSCS) */
+ put_unaligned_be16(MAXIMUM_NUMBER_OF_STREAMS, &arrb4[2]);
+ return SDEBUG_BLE_LEN_AFTER_B4;
+}
+
#define SDEBUG_LONG_INQ_SZ 96
#define SDEBUG_MAX_INQ_ARR_SZ 584
@@ -1903,7 +1924,8 @@ static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
u32 len;
char lu_id_str[6];
int host_no = devip->sdbg_host->shost->host_no;
-
+
+ arr[1] = cmd[2];
port_group_id = (((host_no + 1) & 0x7f) << 8) +
(devip->channel & 0x7f);
if (sdebug_vpd_use_hostno == 0)
@@ -1914,7 +1936,6 @@ static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
(devip->target * 1000) - 3;
len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
if (0 == cmd[2]) { /* supported vital product data pages */
- arr[1] = cmd[2]; /*sanity */
n = 4;
arr[n++] = 0x0; /* this page */
arr[n++] = 0x80; /* unit serial number */
@@ -1932,26 +1953,22 @@ static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
arr[n++] = 0xb2; /* LB Provisioning */
if (is_zbc)
arr[n++] = 0xb6; /* ZB dev. char. */
+ arr[n++] = 0xb7; /* Block limits extension */
}
arr[3] = n - 4; /* number of supported VPD pages */
} else if (0x80 == cmd[2]) { /* unit serial number */
- arr[1] = cmd[2]; /*sanity */
arr[3] = len;
memcpy(&arr[4], lu_id_str, len);
} else if (0x83 == cmd[2]) { /* device identification */
- arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
target_dev_id, lu_id_num,
lu_id_str, len,
&devip->lu_name);
} else if (0x84 == cmd[2]) { /* Software interface ident. */
- arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_vpd_84(&arr[4]);
} else if (0x85 == cmd[2]) { /* Management network addresses */
- arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_vpd_85(&arr[4]);
} else if (0x86 == cmd[2]) { /* extended inquiry */
- arr[1] = cmd[2]; /*sanity */
arr[3] = 0x3c; /* number of following entries */
if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
arr[4] = 0x4; /* SPT: GRD_CHK:1 */
@@ -1959,33 +1976,32 @@ static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
else
arr[4] = 0x0; /* no protection stuff */
- arr[5] = 0x7; /* head of q, ordered + simple q's */
+ /*
+ * GROUP_SUP=1; HEADSUP=1 (HEAD OF QUEUE); ORDSUP=1
+ * (ORDERED queuing); SIMPSUP=1 (SIMPLE queuing).
+ */
+ arr[5] = 0x17;
} else if (0x87 == cmd[2]) { /* mode page policy */
- arr[1] = cmd[2]; /*sanity */
arr[3] = 0x8; /* number of following entries */
arr[4] = 0x2; /* disconnect-reconnect mp */
arr[6] = 0x80; /* mlus, shared */
arr[8] = 0x18; /* protocol specific lu */
arr[10] = 0x82; /* mlus, per initiator port */
} else if (0x88 == cmd[2]) { /* SCSI Ports */
- arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
} else if (is_disk_zbc && 0x89 == cmd[2]) { /* ATA info */
- arr[1] = cmd[2]; /*sanity */
n = inquiry_vpd_89(&arr[4]);
put_unaligned_be16(n, arr + 2);
} else if (is_disk_zbc && 0xb0 == cmd[2]) { /* Block limits */
- arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_vpd_b0(&arr[4]);
} else if (is_disk_zbc && 0xb1 == cmd[2]) { /* Block char. */
- arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_vpd_b1(devip, &arr[4]);
} else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
- arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_vpd_b2(&arr[4]);
} else if (is_zbc && cmd[2] == 0xb6) { /* ZB dev. charact. */
- arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_vpd_b6(devip, &arr[4]);
+ } else if (cmd[2] == 0xb7) { /* block limits extension page */
+ arr[3] = inquiry_vpd_b7(&arr[4]);
} else {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
kfree(arr);
@@ -2554,6 +2570,40 @@ static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target)
return sizeof(ctrl_m_pg);
}
+/* IO Advice Hints Grouping mode page */
+static int resp_grouping_m_pg(unsigned char *p, int pcontrol, int target)
+{
+ /* IO Advice Hints Grouping mode page */
+ struct grouping_m_pg {
+ u8 page_code; /* OR 0x40 when subpage_code > 0 */
+ u8 subpage_code;
+ __be16 page_length;
+ u8 reserved[12];
+ struct scsi_io_group_descriptor descr[MAXIMUM_NUMBER_OF_STREAMS];
+ };
+ static const struct grouping_m_pg gr_m_pg = {
+ .page_code = 0xa | 0x40,
+ .subpage_code = 5,
+ .page_length = cpu_to_be16(sizeof(gr_m_pg) - 4),
+ .descr = {
+ { .st_enble = 1 },
+ { .st_enble = 1 },
+ { .st_enble = 1 },
+ { .st_enble = 1 },
+ { .st_enble = 1 },
+ { .st_enble = 0 },
+ }
+ };
+
+ BUILD_BUG_ON(sizeof(struct grouping_m_pg) !=
+ 16 + MAXIMUM_NUMBER_OF_STREAMS * 16);
+ memcpy(p, &gr_m_pg, sizeof(gr_m_pg));
+ if (1 == pcontrol) {
+ /* There are no changeable values so clear from byte 4 on. */
+ memset(p + 4, 0, sizeof(gr_m_pg) - 4);
+ }
+ return sizeof(gr_m_pg);
+}
static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target)
{ /* Informational Exceptions control mode page for mode_sense */
@@ -2627,7 +2677,8 @@ static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol)
return sizeof(sas_sha_m_pg);
}
-#define SDEBUG_MAX_MSENSE_SZ 256
+/* PAGE_SIZE is more than necessary but provides room for future expansion. */
+#define SDEBUG_MAX_MSENSE_SZ PAGE_SIZE
static int resp_mode_sense(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
@@ -2638,10 +2689,13 @@ static int resp_mode_sense(struct scsi_cmnd *scp,
int target_dev_id;
int target = scp->device->id;
unsigned char *ap;
- unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
+ unsigned char *arr __free(kfree);
unsigned char *cmd = scp->cmnd;
- bool dbd, llbaa, msense_6, is_disk, is_zbc, bad_pcode;
+ bool dbd, llbaa, msense_6, is_disk, is_zbc;
+ arr = kzalloc(SDEBUG_MAX_MSENSE_SZ, GFP_ATOMIC);
+ if (!arr)
+ return -ENOMEM;
dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
pcontrol = (cmd[2] & 0xc0) >> 6;
pcode = cmd[2] & 0x3f;
@@ -2699,45 +2753,63 @@ static int resp_mode_sense(struct scsi_cmnd *scp,
ap = arr + offset;
}
- if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
- /* TODO: Control Extension page */
- mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
- return check_condition_result;
- }
- bad_pcode = false;
-
+ /*
+ * N.B. If len>0 before resp_*_pg() call, then form of that call should be:
+ * len += resp_*_pg(ap + len, pcontrol, target);
+ */
switch (pcode) {
case 0x1: /* Read-Write error recovery page, direct access */
+ if (subpcode > 0x0 && subpcode < 0xff)
+ goto bad_subpcode;
len = resp_err_recov_pg(ap, pcontrol, target);
offset += len;
break;
case 0x2: /* Disconnect-Reconnect page, all devices */
+ if (subpcode > 0x0 && subpcode < 0xff)
+ goto bad_subpcode;
len = resp_disconnect_pg(ap, pcontrol, target);
offset += len;
break;
case 0x3: /* Format device page, direct access */
+ if (subpcode > 0x0 && subpcode < 0xff)
+ goto bad_subpcode;
if (is_disk) {
len = resp_format_pg(ap, pcontrol, target);
offset += len;
- } else
- bad_pcode = true;
+ } else {
+ goto bad_pcode;
+ }
break;
case 0x8: /* Caching page, direct access */
+ if (subpcode > 0x0 && subpcode < 0xff)
+ goto bad_subpcode;
if (is_disk || is_zbc) {
len = resp_caching_pg(ap, pcontrol, target);
offset += len;
- } else
- bad_pcode = true;
+ } else {
+ goto bad_pcode;
+ }
break;
case 0xa: /* Control Mode page, all devices */
- len = resp_ctrl_m_pg(ap, pcontrol, target);
+ switch (subpcode) {
+ case 0:
+ len = resp_ctrl_m_pg(ap, pcontrol, target);
+ break;
+ case 0x05:
+ len = resp_grouping_m_pg(ap, pcontrol, target);
+ break;
+ case 0xff:
+ len = resp_ctrl_m_pg(ap, pcontrol, target);
+ len += resp_grouping_m_pg(ap + len, pcontrol, target);
+ break;
+ default:
+ goto bad_subpcode;
+ }
offset += len;
break;
case 0x19: /* if spc==1 then sas phy, control+discover */
- if ((subpcode > 0x2) && (subpcode < 0xff)) {
- mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
- return check_condition_result;
- }
+ if (subpcode > 0x2 && subpcode < 0xff)
+ goto bad_subpcode;
len = 0;
if ((0x0 == subpcode) || (0xff == subpcode))
len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
@@ -2749,49 +2821,50 @@ static int resp_mode_sense(struct scsi_cmnd *scp,
offset += len;
break;
case 0x1c: /* Informational Exceptions Mode page, all devices */
+ if (subpcode > 0x0 && subpcode < 0xff)
+ goto bad_subpcode;
len = resp_iec_m_pg(ap, pcontrol, target);
offset += len;
break;
case 0x3f: /* Read all Mode pages */
- if ((0 == subpcode) || (0xff == subpcode)) {
- len = resp_err_recov_pg(ap, pcontrol, target);
- len += resp_disconnect_pg(ap + len, pcontrol, target);
- if (is_disk) {
- len += resp_format_pg(ap + len, pcontrol,
- target);
- len += resp_caching_pg(ap + len, pcontrol,
- target);
- } else if (is_zbc) {
- len += resp_caching_pg(ap + len, pcontrol,
- target);
- }
- len += resp_ctrl_m_pg(ap + len, pcontrol, target);
- len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
- if (0xff == subpcode) {
- len += resp_sas_pcd_m_spg(ap + len, pcontrol,
- target, target_dev_id);
- len += resp_sas_sha_m_spg(ap + len, pcontrol);
- }
- len += resp_iec_m_pg(ap + len, pcontrol, target);
- offset += len;
- } else {
- mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
- return check_condition_result;
+ if (subpcode > 0x0 && subpcode < 0xff)
+ goto bad_subpcode;
+ len = resp_err_recov_pg(ap, pcontrol, target);
+ len += resp_disconnect_pg(ap + len, pcontrol, target);
+ if (is_disk) {
+ len += resp_format_pg(ap + len, pcontrol, target);
+ len += resp_caching_pg(ap + len, pcontrol, target);
+ } else if (is_zbc) {
+ len += resp_caching_pg(ap + len, pcontrol, target);
}
+ len += resp_ctrl_m_pg(ap + len, pcontrol, target);
+ if (0xff == subpcode)
+ len += resp_grouping_m_pg(ap + len, pcontrol, target);
+ len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
+ if (0xff == subpcode) {
+ len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
+ target_dev_id);
+ len += resp_sas_sha_m_spg(ap + len, pcontrol);
+ }
+ len += resp_iec_m_pg(ap + len, pcontrol, target);
+ offset += len;
break;
default:
- bad_pcode = true;
- break;
- }
- if (bad_pcode) {
- mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
- return check_condition_result;
+ goto bad_pcode;
}
if (msense_6)
arr[0] = offset - 1;
else
put_unaligned_be16((offset - 2), arr + 0);
return fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, offset));
+
+bad_pcode:
+ mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
+ return check_condition_result;
+
+bad_subpcode:
+ mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
+ return check_condition_result;
}
#define SDEBUG_MAX_MSELECT_SZ 512
@@ -3306,7 +3379,8 @@ static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip,
/* Returns number of bytes copied or -1 if error. */
static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp,
- u32 sg_skip, u64 lba, u32 num, bool do_write)
+ u32 sg_skip, u64 lba, u32 num, bool do_write,
+ u8 group_number)
{
int ret;
u64 block, rest = 0;
@@ -3325,6 +3399,10 @@ static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp,
return 0;
if (scp->sc_data_direction != dir)
return -1;
+
+ if (do_write && group_number < ARRAY_SIZE(writes_by_group_number))
+ atomic_long_inc(&writes_by_group_number[group_number]);
+
fsp = sip->storep;
block = do_div(lba, sdebug_store_sectors);
@@ -3698,7 +3776,7 @@ static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
}
}
- ret = do_device_access(sip, scp, 0, lba, num, false);
+ ret = do_device_access(sip, scp, 0, lba, num, false, 0);
sdeb_read_unlock(sip);
if (unlikely(ret == -1))
return DID_ERROR << 16;
@@ -3883,6 +3961,7 @@ static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
{
bool check_prot;
u32 num;
+ u8 group = 0;
u32 ei_lba;
int ret;
u64 lba;
@@ -3894,11 +3973,13 @@ static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
ei_lba = 0;
lba = get_unaligned_be64(cmd + 2);
num = get_unaligned_be32(cmd + 10);
+ group = cmd[14] & 0x3f;
check_prot = true;
break;
case WRITE_10:
ei_lba = 0;
lba = get_unaligned_be32(cmd + 2);
+ group = cmd[6] & 0x3f;
num = get_unaligned_be16(cmd + 7);
check_prot = true;
break;
@@ -3913,15 +3994,18 @@ static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
ei_lba = 0;
lba = get_unaligned_be32(cmd + 2);
num = get_unaligned_be32(cmd + 6);
+ group = cmd[6] & 0x3f;
check_prot = true;
break;
case 0x53: /* XDWRITEREAD(10) */
ei_lba = 0;
lba = get_unaligned_be32(cmd + 2);
+ group = cmd[6] & 0x1f;
num = get_unaligned_be16(cmd + 7);
check_prot = false;
break;
default: /* assume WRITE(32) */
+ group = cmd[6] & 0x3f;
lba = get_unaligned_be64(cmd + 12);
ei_lba = get_unaligned_be32(cmd + 20);
num = get_unaligned_be32(cmd + 28);
@@ -3976,7 +4060,7 @@ static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
}
}
- ret = do_device_access(sip, scp, 0, lba, num, true);
+ ret = do_device_access(sip, scp, 0, lba, num, true, group);
if (unlikely(scsi_debug_lbp()))
map_region(sip, lba, num);
/* If ZBC zone then bump its write pointer */
@@ -4028,12 +4112,14 @@ static int resp_write_scat(struct scsi_cmnd *scp,
u32 lb_size = sdebug_sector_size;
u32 ei_lba;
u64 lba;
+ u8 group;
int ret, res;
bool is_16;
static const u32 lrd_size = 32; /* + parameter list header size */
if (cmd[0] == VARIABLE_LENGTH_CMD) {
is_16 = false;
+ group = cmd[6] & 0x3f;
wrprotect = (cmd[10] >> 5) & 0x7;
lbdof = get_unaligned_be16(cmd + 12);
num_lrd = get_unaligned_be16(cmd + 16);
@@ -4044,6 +4130,7 @@ static int resp_write_scat(struct scsi_cmnd *scp,
lbdof = get_unaligned_be16(cmd + 4);
num_lrd = get_unaligned_be16(cmd + 8);
bt_len = get_unaligned_be32(cmd + 10);
+ group = cmd[14] & 0x3f;
if (unlikely(have_dif_prot)) {
if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
wrprotect) {
@@ -4132,7 +4219,7 @@ static int resp_write_scat(struct scsi_cmnd *scp,
}
}
- ret = do_device_access(sip, scp, sg_off, lba, num, true);
+ ret = do_device_access(sip, scp, sg_off, lba, num, true, group);
/* If ZBC zone then bump its write pointer */
if (sdebug_dev_is_zoned(devip))
zbc_inc_wp(devip, lba, num);
@@ -4507,6 +4594,51 @@ static int resp_get_lba_status(struct scsi_cmnd *scp,
return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
}
+static int resp_get_stream_status(struct scsi_cmnd *scp,
+ struct sdebug_dev_info *devip)
+{
+ u16 starting_stream_id, stream_id;
+ const u8 *cmd = scp->cmnd;
+ u32 alloc_len, offset;
+ u8 arr[256] = {};
+ struct scsi_stream_status_header *h = (void *)arr;
+
+ starting_stream_id = get_unaligned_be16(cmd + 4);
+ alloc_len = get_unaligned_be32(cmd + 10);
+
+ if (alloc_len < 8) {
+ mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
+ return check_condition_result;
+ }
+
+ if (starting_stream_id >= MAXIMUM_NUMBER_OF_STREAMS) {
+ mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
+ return check_condition_result;
+ }
+
+ /*
+ * The GET STREAM STATUS command only reports status information
+ * about open streams. Treat the non-permanent stream as open.
+ */
+ put_unaligned_be16(MAXIMUM_NUMBER_OF_STREAMS,
+ &h->number_of_open_streams);
+
+ for (offset = 8, stream_id = starting_stream_id;
+ offset + 8 <= min_t(u32, alloc_len, sizeof(arr)) &&
+ stream_id < MAXIMUM_NUMBER_OF_STREAMS;
+ offset += 8, stream_id++) {
+ struct scsi_stream_status *stream_status = (void *)arr + offset;
+
+ stream_status->perm = stream_id < PERMANENT_STREAM_COUNT;
+ put_unaligned_be16(stream_id,
+ &stream_status->stream_identifier);
+ stream_status->rel_lifetime = stream_id + 1;
+ }
+ put_unaligned_be32(offset - 8, &h->len); /* PARAMETER DATA LENGTH */
+
+ return fill_from_dev_buffer(scp, arr, min(offset, alloc_len));
+}
+
static int resp_sync_cache(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
@@ -7182,6 +7314,30 @@ static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf)
}
static DRIVER_ATTR_RO(tur_ms_to_ready);
+static ssize_t group_number_stats_show(struct device_driver *ddp, char *buf)
+{
+ char *p = buf, *end = buf + PAGE_SIZE;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(writes_by_group_number); i++)
+ p += scnprintf(p, end - p, "%d %ld\n", i,
+ atomic_long_read(&writes_by_group_number[i]));
+
+ return p - buf;
+}
+
+static ssize_t group_number_stats_store(struct device_driver *ddp,
+ const char *buf, size_t count)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(writes_by_group_number); i++)
+ atomic_long_set(&writes_by_group_number[i], 0);
+
+ return count;
+}
+static DRIVER_ATTR_RW(group_number_stats);
+
/* 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
@@ -7228,6 +7384,7 @@ static struct attribute *sdebug_drv_attrs[] = {
&driver_attr_cdb_len.attr,
&driver_attr_tur_ms_to_ready.attr,
&driver_attr_zbc.attr,
+ &driver_attr_group_number_stats.attr,
NULL,
};
ATTRIBUTE_GROUPS(sdebug_drv);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 01:36:46 +0100