From: Douglas Gilbert <dgilbert@xxxxxxxxxxxx>
Add support for the 5 ZBC commands and enough functionality to emulate
a host-managed device with one conventional zone and a set of sequential
write required zones up to the disk capacity.
Signed-off-by: Douglas Gilbert <dgilbert@xxxxxxxxxxxx>
Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxx>
---
drivers/scsi/scsi_debug.c | 819 +++++++++++++++++++++++++++++++++++++-
1 file changed, 804 insertions(+), 15 deletions(-)
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 4aa4d9e58978..10214017d478 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -94,6 +94,11 @@ static const char *sdebug_version_date = "20200421";
#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
#define WRITE_ERROR_ASC 0xc
+#define UNALIGNED_WRITE_ASCQ 0x4
+#define WRITE_BOUNDARY_ASCQ 0x5
+#define READ_INVDATA_ASCQ 0x6
+#define READ_BOUNDARY_ASCQ 0x7
+#define INSUFF_ZONE_ASCQ 0xe
/* Additional Sense Code Qualifier (ASCQ) */
#define ACK_NAK_TO 0x3
@@ -147,6 +152,10 @@ static const char *sdebug_version_date = "20200421";
#define DEF_UUID_CTL 0
#define JDELAY_OVERRIDDEN -9999
+/* Default parameters for ZBC drives */
+#define DEF_ZBC_ZONE_SIZE_MB 128
+#define DEF_ZBC_MAX_OPEN_ZONES 8
+
#define SDEBUG_LUN_0_VAL 0
/* bit mask values for sdebug_opts */
@@ -250,6 +259,24 @@ static const char *sdebug_version_date = "20200421";
#define SDEB_XA_NOT_IN_USE XA_MARK_1
+/* enumeration names taken from table 26, zbcr05 */
+enum sdebug_z_cond {
+ ZBC_NOT_WRITE_POINTER = 0x0,
+ ZC1_EMPTY = 0x1,
+ ZC2_IMPLICIT_OPEN = 0x2,
+ ZC3_EXPLICIT_OPEN = 0x3,
+ ZC4_CLOSED = 0x4,
+ ZC6_READ_ONLY = 0xd,
+ ZC5_FULL = 0xe,
+ ZC7_OFFLINE = 0xf,
+};
+
+struct sdeb_zone_state { /* ZBC: per zone state */
+ enum sdebug_z_cond z_cond;
+ unsigned int z_size;
+ sector_t z_start;
+ sector_t z_wp;
+};
struct sdebug_dev_info {
struct list_head dev_list;
@@ -262,6 +289,16 @@ struct sdebug_dev_info {
atomic_t num_in_q;
atomic_t stopped;
bool used;
+
+ /* For ZBC devices */
+ unsigned int zsize;
+ unsigned int zsize_shift;
+ unsigned int nr_zones;
+ unsigned int nr_imp_open;
+ unsigned int nr_exp_open;
+ unsigned int nr_closed;
+ unsigned int max_open;
+ struct sdeb_zone_state *zstate;
};
struct sdebug_host_info {
@@ -369,7 +406,9 @@ enum sdeb_opcode_index {
SDEB_I_SYNC_CACHE = 27, /* 10, 16 */
SDEB_I_COMP_WRITE = 28,
SDEB_I_PRE_FETCH = 29, /* 10, 16 */
- SDEB_I_LAST_ELEM_P1 = 30, /* keep this last (previous + 1) */
+ SDEB_I_ZONE_OUT = 30, /* 0x94+SA; includes no data xfer */
+ SDEB_I_ZONE_IN = 31, /* 0x95+SA; all have data-in */
+ SDEB_I_LAST_ELEM_P1 = 32, /* keep this last (previous + 1) */
};
@@ -401,7 +440,8 @@ static const unsigned char opcode_ind_arr[256] = {
0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0,
0, 0, 0, SDEB_I_VERIFY,
- SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
+ SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME,
+ SDEB_I_ZONE_OUT, SDEB_I_ZONE_IN, 0, 0,
0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16,
/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
@@ -449,6 +489,11 @@ static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_pre_fetch(struct scsi_cmnd *, struct sdebug_dev_info *);
+static int resp_report_zones(struct scsi_cmnd *, struct sdebug_dev_info *);
+static int resp_open_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
+static int resp_close_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
+static int resp_finish_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
+static int resp_rwp_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
static int sdebug_do_add_host(bool mk_new_store);
static int sdebug_add_host_helper(int per_host_idx);
@@ -553,6 +598,24 @@ static const struct opcode_info_t pre_fetch_iarr[] = {
0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* PRE-FETCH (16) */
};
+static const struct opcode_info_t zone_out_iarr[] = { /* ZONE OUT(16) */
+ {0, 0x94, 0x1, F_SA_LOW, resp_close_zone, NULL,
+ {16, 0x1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* CLOSE ZONE */
+ {0, 0x94, 0x2, F_SA_LOW, resp_finish_zone, NULL,
+ {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* FINISH ZONE */
+ {0, 0x94, 0x4, F_SA_LOW, resp_rwp_zone, NULL,
+ {16, 0x4, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* RESET WRITE POINTER */
+};
+
+static const struct opcode_info_t zone_in_iarr[] = { /* ZONE IN(16) */
+ {0, 0x95, 0x6, F_SA_LOW | F_D_IN, NULL, NULL,
+ {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* REPORT ZONES */
+};
+
/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
* plus the terminating elements for logic that scans this table such as
@@ -655,6 +718,15 @@ static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEM_P1 + 1] = {
0, 0, 0, 0} }, /* PRE-FETCH (10) */
/* 30 */
+ {ARRAY_SIZE(zone_out_iarr), 0x94, 0x3, F_SA_LOW,
+ resp_open_zone, zone_out_iarr, /* ZONE_OUT(16), OPEN ZONE) */
+ {16, 0x3 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x1, 0xc7} },
+ {ARRAY_SIZE(zone_in_iarr), 0x95, 0x0, F_SA_LOW | F_D_IN,
+ resp_report_zones, zone_in_iarr, /* ZONE_IN(16), REPORT ZONES) */
+ {16, 0x0 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7} },
+/* sentinel */
{0xff, 0, 0, 0, NULL, NULL, /* terminating element */
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
};
@@ -742,6 +814,11 @@ static int dix_writes;
static int dix_reads;
static int dif_errors;
+/* ZBC global data */
+static bool sdeb_zbc_in_use; /* true when ptype=TYPE_ZBC [0x14] */
+static const int zbc_zone_size_mb;
+static const int zbc_max_open_zones = DEF_ZBC_MAX_OPEN_ZONES;
+
static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */
@@ -1446,20 +1523,22 @@ static int inquiry_vpd_b2(unsigned char *arr)
}
/* Zoned block device characteristics VPD page (ZBC mandatory) */
-static int inquiry_vpd_b6(unsigned char *arr)
+static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr)
{
memset(arr, 0, 0x3c);
arr[0] = 0x1; /* set URSWRZ (unrestricted read in seq. wr req zone) */
/*
* Set Optimal number of open sequential write preferred zones and
* Optimal number of non-sequentially written sequential write
- * preferred zones and Maximum number of open sequential write
- * required zones fields to 'not reported' (0xffffffff). Leave other
- * fields set to zero.
+ * preferred zones fields to 'not reported' (0xffffffff). Leave other
+ * fields set to zero, apart from Max. number of open swrz_s field.
*/
put_unaligned_be32(0xffffffff, &arr[4]);
put_unaligned_be32(0xffffffff, &arr[8]);
- put_unaligned_be32(0xffffffff, &arr[12]);
+ if (devip->max_open)
+ put_unaligned_be32(devip->max_open, &arr[12]);
+ else
+ put_unaligned_be32(0xffffffff, &arr[12]);
return 0x3c;
}
@@ -1579,7 +1658,7 @@ static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
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(&arr[4]);
+ arr[3] = inquiry_vpd_b6(devip, &arr[4]);
} else {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
kfree(arr);
@@ -2550,9 +2629,185 @@ static int resp_log_sense(struct scsi_cmnd *scp,
min_t(int, len, SDEBUG_MAX_INQ_ARR_SZ));
}
-static inline int check_device_access_params(struct scsi_cmnd *scp,
- unsigned long long lba, unsigned int num, bool write)
+static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip)
+{
+ return devip->nr_zones != 0;
+}
+
+static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip,
+ unsigned long long lba)
+{
+ unsigned int zno;
+
+ if (devip->zsize_shift)
+ zno = lba >> devip->zsize_shift;
+ else
+ zno = lba / devip->zsize;
+ return &devip->zstate[zno];
+}
+
+static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp)
+{
+ return zsp->z_cond == ZBC_NOT_WRITE_POINTER;
+}
+
+static void zbc_close_zone(struct sdebug_dev_info *devip,
+ struct sdeb_zone_state *zsp)
+{
+ enum sdebug_z_cond zc;
+
+ if (zbc_zone_is_conv(zsp))
+ return;
+
+ zc = zsp->z_cond;
+ if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN))
+ return;
+
+ if (zc == ZC2_IMPLICIT_OPEN)
+ devip->nr_imp_open--;
+ else
+ devip->nr_exp_open--;
+
+ if (zsp->z_wp == zsp->z_start) {
+ zsp->z_cond = ZC1_EMPTY;
+ } else {
+ zsp->z_cond = ZC4_CLOSED;
+ devip->nr_closed++;
+ }
+}
+
+static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip)
+{
+ struct sdeb_zone_state *zsp = &devip->zstate[0];
+ unsigned int i;
+
+ for (i = 0; i < devip->nr_zones; i++, zsp++) {
+ if (zsp->z_cond == ZC2_IMPLICIT_OPEN) {
+ zbc_close_zone(devip, zsp);
+ return;
+ }
+ }
+}
+
+static void zbc_open_zone(struct sdebug_dev_info *devip,
+ struct sdeb_zone_state *zsp, bool explicit)
+{
+ enum sdebug_z_cond zc;
+
+ if (zbc_zone_is_conv(zsp))
+ return;
+
+ zc = zsp->z_cond;
+ if ((explicit && zc == ZC3_EXPLICIT_OPEN) ||
+ (!explicit && zc == ZC2_IMPLICIT_OPEN))
+ return;
+
+ /* Close an implicit open zone if necessary */
+ if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN)
+ zbc_close_zone(devip, zsp);
+ else if (devip->max_open &&
+ devip->nr_imp_open + devip->nr_exp_open >= devip->max_open)
+ zbc_close_imp_open_zone(devip);
+
+ if (zsp->z_cond == ZC4_CLOSED)
+ devip->nr_closed--;
+ if (explicit) {
+ zsp->z_cond = ZC3_EXPLICIT_OPEN;
+ devip->nr_exp_open++;
+ } else {
+ zsp->z_cond = ZC2_IMPLICIT_OPEN;
+ devip->nr_imp_open++;
+ }
+}
+
+static void zbc_inc_wp(struct sdebug_dev_info *devip,
+ unsigned long long lba, unsigned int num)
+{
+ struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
+
+ if (zbc_zone_is_conv(zsp))
+ return;
+
+ zsp->z_wp += num;
+ if (zsp->z_wp >= zsp->z_start + zsp->z_size)
+ zsp->z_cond = ZC5_FULL;
+}
+
+static int check_zbc_access_params(struct scsi_cmnd *scp,
+ unsigned long long lba, unsigned int num, bool write)
+{
+ struct scsi_device *sdp = scp->device;
+ struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
+ struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
+ struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1);
+
+ if (!write) {
+ /* Reads cannot cross zone types boundaries */
+ if (zsp_end != zsp &&
+ zbc_zone_is_conv(zsp) &&
+ !zbc_zone_is_conv(zsp_end)) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST,
+ LBA_OUT_OF_RANGE,
+ READ_INVDATA_ASCQ);
+ return check_condition_result;
+ }
+ return 0;
+ }
+
+ /* No restrictions for writes within conventional zones */
+ if (zbc_zone_is_conv(zsp)) {
+ if (!zbc_zone_is_conv(zsp_end)) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST,
+ LBA_OUT_OF_RANGE,
+ WRITE_BOUNDARY_ASCQ);
+ return check_condition_result;
+ }
+ return 0;
+ }
+
+ /* Writes cannot cross sequential zone boundaries */
+ if (zsp_end != zsp) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST,
+ LBA_OUT_OF_RANGE,
+ WRITE_BOUNDARY_ASCQ);
+ return check_condition_result;
+ }
+ /* Cannot write full zones */
+ if (zsp->z_cond == ZC5_FULL) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST,
+ INVALID_FIELD_IN_CDB, 0);
+ return check_condition_result;
+ }
+ /* Writes must be aligned to the zone WP */
+ if (lba != zsp->z_wp) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST,
+ LBA_OUT_OF_RANGE,
+ UNALIGNED_WRITE_ASCQ);
+ return check_condition_result;
+ }
+
+ /* Handle implicit open of closed and empty zones */
+ if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) {
+ if (devip->max_open &&
+ devip->nr_exp_open >= devip->max_open) {
+ mk_sense_buffer(scp, DATA_PROTECT,
+ INSUFF_RES_ASC,
+ INSUFF_ZONE_ASCQ);
+ return check_condition_result;
+ }
+ zbc_open_zone(devip, zsp, false);
+ }
+
+ return 0;
+}
+
+static inline int check_device_access_params
+ (struct scsi_cmnd *scp, unsigned long long lba,
+ unsigned int num, bool write)
{
+ struct scsi_device *sdp = scp->device;
+ struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
+
if (lba + num > sdebug_capacity) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
return check_condition_result;
@@ -2567,6 +2822,9 @@ static inline int check_device_access_params(struct scsi_cmnd *scp,
mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2);
return check_condition_result;
}
+ if (sdebug_dev_is_zoned(devip))
+ return check_zbc_access_params(scp, lba, num, write);
+
return 0;
}
@@ -3153,10 +3411,13 @@ static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
"to DIF device\n");
}
+
+ write_lock(macc_lckp);
ret = check_device_access_params(scp, lba, num, true);
- if (ret)
+ if (ret) {
+ write_unlock(macc_lckp);
return ret;
- write_lock(macc_lckp);
+ }
/* DIX + T10 DIF */
if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
@@ -3172,6 +3433,9 @@ static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
ret = do_device_access(sip, scp, 0, lba, num, true);
if (unlikely(scsi_debug_lbp()))
map_region(sip, lba, num);
+ /* If ZBC zone then bump its write pointer */
+ if (sdebug_dev_is_zoned(devip))
+ zbc_inc_wp(devip, lba, num);
write_unlock(macc_lckp);
if (unlikely(-1 == ret))
return DID_ERROR << 16;
@@ -3326,6 +3590,9 @@ static int resp_write_scat(struct scsi_cmnd *scp,
}
ret = do_device_access(sip, scp, sg_off, lba, num, true);
+ /* If ZBC zone then bump its write pointer */
+ if (sdebug_dev_is_zoned(devip))
+ zbc_inc_wp(devip, lba, num);
if (unlikely(scsi_debug_lbp()))
map_region(sip, lba, num);
if (unlikely(-1 == ret)) {
@@ -3374,6 +3641,8 @@ static int resp_write_scat(struct scsi_cmnd *scp,
static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
u32 ei_lba, bool unmap, bool ndob)
{
+ struct scsi_device *sdp = scp->device;
+ struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
unsigned long long i;
u64 block, lbaa;
u32 lb_size = sdebug_sector_size;
@@ -3384,11 +3653,13 @@ static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
u8 *fs1p;
u8 *fsp;
+ write_lock(macc_lckp);
+
ret = check_device_access_params(scp, lba, num, true);
- if (ret)
+ if (ret) {
+ write_unlock(macc_lckp);
return ret;
-
- write_lock(macc_lckp);
+ }
if (unmap && scsi_debug_lbp()) {
unmap_region(sip, lba, num);
@@ -3421,6 +3692,9 @@ static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
}
if (scsi_debug_lbp())
map_region(sip, lba, num);
+ /* If ZBC zone then bump its write pointer */
+ if (sdebug_dev_is_zoned(devip))
+ zbc_inc_wp(devip, lba, num);
out:
write_unlock(macc_lckp);
@@ -3948,6 +4222,426 @@ static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
return ret;
}
+#define RZONES_DESC_HD 64
+
+/* Report zones depending on start LBA nad reporting options */
+static int resp_report_zones(struct scsi_cmnd *scp,
+ struct sdebug_dev_info *devip)
+{
+ unsigned int i, max_zones, rep_max_zones, nrz = 0;
+ int ret = 0;
+ u32 alloc_len, rep_opts, rep_len;
+ bool partial;
+ u64 lba, zs_lba;
+ u8 *arr = NULL, *desc;
+ u8 *cmd = scp->cmnd;
+ struct sdeb_zone_state *zsp;
+ struct sdeb_store_info *sip = devip2sip(devip);
+ rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
+
+ if (!sdebug_dev_is_zoned(devip)) {
+ mk_sense_invalid_opcode(scp);
+ return check_condition_result;
+ }
+ zs_lba = get_unaligned_be64(cmd + 2);
+ alloc_len = get_unaligned_be32(cmd + 10);
+ rep_opts = cmd[14] & 0x3f;
+ partial = cmd[14] & 0x80;
+
+ if (zs_lba >= sdebug_capacity) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
+ return check_condition_result;
+ }
+
+ max_zones = devip->nr_zones - zs_lba / devip->zsize;
+ rep_max_zones = min((alloc_len - 64) >> ilog2(RZONES_DESC_HD),
+ max_zones);
+
+ arr = kcalloc(RZONES_DESC_HD, alloc_len, GFP_ATOMIC);
+ if (!arr) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
+ INSUFF_RES_ASCQ);
+ return check_condition_result;
+ }
+
+ read_lock(macc_lckp);
+
+ desc = arr + 64;
+ for (i = 0; i < max_zones; i++) {
+ lba = zs_lba + devip->zsize * i;
+ if (lba > sdebug_capacity)
+ break;
+ zsp = zbc_zone(devip, lba);
+ switch (rep_opts) {
+ case 0x00:
+ /* All zones */
+ break;
+ case 0x01:
+ /* Empty zones */
+ if (zsp->z_cond != ZC1_EMPTY)
+ continue;
+ break;
+ case 0x02:
+ /* Implicit open zones */
+ if (zsp->z_cond != ZC2_IMPLICIT_OPEN)
+ continue;
+ break;
+ case 0x03:
+ /* Explicit open zones */
+ if (zsp->z_cond != ZC3_EXPLICIT_OPEN)
+ continue;
+ break;
+ case 0x04:
+ /* Closed zones */
+ if (zsp->z_cond != ZC4_CLOSED)
+ continue;
+ break;
+ case 0x05:
+ /* Full zones */
+ if (zsp->z_cond != ZC5_FULL)
+ continue;
+ break;
+ case 0x06:
+ case 0x07:
+ case 0x10:
+ case 0x11:
+ /*
+ * Read-only, offline, reset WP recommended and
+ * non-seq-resource-used are not emulated: no zones
+ * to report;
+ */
+ continue;
+ case 0x3f:
+ /* Not write pointer (conventional) zones */
+ if (!zbc_zone_is_conv(zsp))
+ continue;
+ break;
+ default:
+ mk_sense_buffer(scp, ILLEGAL_REQUEST,
+ INVALID_FIELD_IN_CDB, 0);
+ ret = check_condition_result;
+ goto fini;
+ }
+
+ if (nrz < rep_max_zones) {
+ /* Fill zone descriptor */
+ if (zbc_zone_is_conv(zsp))
+ desc[0] = 0x1;
+ else
+ desc[0] = 0x2;
+ desc[1] = zsp->z_cond << 4;
+ put_unaligned_be64((u64)zsp->z_size, desc + 8);
+ put_unaligned_be64((u64)zsp->z_start, desc + 16);
+ put_unaligned_be64((u64)zsp->z_wp, desc + 24);
+ desc += 64;
+ }
+
+ if (partial && nrz >= rep_max_zones)
+ break;
+
+ nrz++;
+ }
+
+ /* Report header */
+ put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0);
+ put_unaligned_be64(sdebug_capacity - 1, arr + 8);
+
+ rep_len = (unsigned long)desc - (unsigned long)arr;
+ ret = fill_from_dev_buffer(scp, arr, min_t(int, alloc_len, rep_len));
+
+fini:
+ read_unlock(macc_lckp);
+ kfree(arr);
+ return ret;
+}
+
+/* Logic transplanted from tcmu-runner, file_zbc.c */
+static void zbc_open_all(struct sdebug_dev_info *devip)
+{
+ struct sdeb_zone_state *zsp = &devip->zstate[0];
+ unsigned int i;
+
+ for (i = 0; i < devip->nr_zones; i++, zsp++) {
+ if (zsp->z_cond == ZC4_CLOSED)
+ zbc_open_zone(devip, &devip->zstate[i], true);
+ }
+}
+
+static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
+{
+ int res = 0;
+ u64 z_id;
+ enum sdebug_z_cond zc;
+ u8 *cmd = scp->cmnd;
+ struct sdeb_zone_state *zsp;
+ bool all = cmd[14] & 0x01;
+ struct sdeb_store_info *sip = devip2sip(devip);
+ rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
+
+ if (!sdebug_dev_is_zoned(devip)) {
+ mk_sense_invalid_opcode(scp);
+ return check_condition_result;
+ }
+
+ write_lock(macc_lckp);
+
+ if (all) {
+ /* Check if all closed zones can be open */
+ if (devip->max_open &&
+ devip->nr_exp_open + devip->nr_closed > devip->max_open) {
+ mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
+ INSUFF_ZONE_ASCQ);
+ res = check_condition_result;
+ goto fini;
+ }
+ /* Open all closed zones */
+ zbc_open_all(devip);
+ goto fini;
+ }
+
+ /* Open the specified zone */
+ z_id = get_unaligned_be64(cmd + 2);
+ if (z_id >= sdebug_capacity) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
+ res = check_condition_result;
+ goto fini;
+ }
+
+ zsp = zbc_zone(devip, z_id);
+ if (z_id != zsp->z_start) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
+ res = check_condition_result;
+ goto fini;
+ }
+ if (zbc_zone_is_conv(zsp)) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
+ res = check_condition_result;
+ goto fini;
+ }
+
+ zc = zsp->z_cond;
+ if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL)
+ goto fini;
+
+ if (devip->max_open && devip->nr_exp_open >= devip->max_open) {
+ mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
+ INSUFF_ZONE_ASCQ);
+ res = check_condition_result;
+ goto fini;
+ }
+
+ if (zc == ZC2_IMPLICIT_OPEN)
+ zbc_close_zone(devip, zsp);
+ zbc_open_zone(devip, zsp, true);
+fini:
+ write_unlock(macc_lckp);
+ return res;
+}
+
+static void zbc_close_all(struct sdebug_dev_info *devip)
+{
+ unsigned int i;
+
+ for (i = 0; i < devip->nr_zones; i++)
+ zbc_close_zone(devip, &devip->zstate[i]);
+}
+
+static int resp_close_zone(struct scsi_cmnd *scp,
+ struct sdebug_dev_info *devip)
+{
+ int res = 0;
+ u64 z_id;
+ u8 *cmd = scp->cmnd;
+ struct sdeb_zone_state *zsp;
+ bool all = cmd[14] & 0x01;
+ struct sdeb_store_info *sip = devip2sip(devip);
+ rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
+
+ if (!sdebug_dev_is_zoned(devip)) {
+ mk_sense_invalid_opcode(scp);
+ return check_condition_result;
+ }
+
+ write_lock(macc_lckp);
+
+ if (all) {
+ zbc_close_all(devip);
+ goto fini;
+ }
+
+ /* Close specified zone */
+ z_id = get_unaligned_be64(cmd + 2);
+ if (z_id >= sdebug_capacity) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
+ res = check_condition_result;
+ goto fini;
+ }
+
+ zsp = zbc_zone(devip, z_id);
+ if (z_id != zsp->z_start) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
+ res = check_condition_result;
+ goto fini;
+ }
+ if (zbc_zone_is_conv(zsp)) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
+ res = check_condition_result;
+ goto fini;
+ }
+
+ zbc_close_zone(devip, zsp);
+fini:
+ write_unlock(macc_lckp);
+ return res;
+}
+
+static void zbc_finish_zone(struct sdebug_dev_info *devip,
+ struct sdeb_zone_state *zsp, bool empty)
+{
+ enum sdebug_z_cond zc = zsp->z_cond;
+
+ if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN ||
+ zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) {
+ if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
+ zbc_close_zone(devip, zsp);
+ if (zsp->z_cond == ZC4_CLOSED)
+ devip->nr_closed--;
+ zsp->z_wp = zsp->z_start + zsp->z_size;
+ zsp->z_cond = ZC5_FULL;
+ }
+}
+
+static void zbc_finish_all(struct sdebug_dev_info *devip)
+{
+ unsigned int i;
+
+ for (i = 0; i < devip->nr_zones; i++)
+ zbc_finish_zone(devip, &devip->zstate[i], false);
+}
+
+static int resp_finish_zone(struct scsi_cmnd *scp,
+ struct sdebug_dev_info *devip)
+{
+ struct sdeb_zone_state *zsp;
+ int res = 0;
+ u64 z_id;
+ u8 *cmd = scp->cmnd;
+ bool all = cmd[14] & 0x01;
+ struct sdeb_store_info *sip = devip2sip(devip);
+ rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
+
+ if (!sdebug_dev_is_zoned(devip)) {
+ mk_sense_invalid_opcode(scp);
+ return check_condition_result;
+ }
+
+ write_lock(macc_lckp);
+
+ if (all) {
+ zbc_finish_all(devip);
+ goto fini;
+ }
+
+ /* Finish the specified zone */
+ z_id = get_unaligned_be64(cmd + 2);
+ if (z_id >= sdebug_capacity) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
+ res = check_condition_result;
+ goto fini;
+ }
+
+ zsp = zbc_zone(devip, z_id);
+ if (z_id != zsp->z_start) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
+ res = check_condition_result;
+ goto fini;
+ }
+ if (zbc_zone_is_conv(zsp)) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
+ res = check_condition_result;
+ goto fini;
+ }
+
+ zbc_finish_zone(devip, zsp, true);
+fini:
+ write_unlock(macc_lckp);
+ return res;
+}
+
+static void zbc_rwp_zone(struct sdebug_dev_info *devip,
+ struct sdeb_zone_state *zsp)
+{
+ enum sdebug_z_cond zc;
+
+ if (zbc_zone_is_conv(zsp))
+ return;
+
+ zc = zsp->z_cond;
+ if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
+ zbc_close_zone(devip, zsp);
+
+ if (zsp->z_cond == ZC4_CLOSED)
+ devip->nr_closed--;
+
+ zsp->z_wp = zsp->z_start;
+ zsp->z_cond = ZC1_EMPTY;
+}
+
+static void zbc_rwp_all(struct sdebug_dev_info *devip)
+{
+ unsigned int i;
+
+ for (i = 0; i < devip->nr_zones; i++)
+ zbc_rwp_zone(devip, &devip->zstate[i]);
+}
+
+static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
+{
+ struct sdeb_zone_state *zsp;
+ int res = 0;
+ u64 z_id;
+ u8 *cmd = scp->cmnd;
+ bool all = cmd[14] & 0x01;
+ struct sdeb_store_info *sip = devip2sip(devip);
+ rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
+
+ if (!sdebug_dev_is_zoned(devip)) {
+ mk_sense_invalid_opcode(scp);
+ return check_condition_result;
+ }
+
+ write_lock(macc_lckp);
+
+ if (all) {
+ zbc_rwp_all(devip);
+ goto fini;
+ }
+
+ z_id = get_unaligned_be64(cmd + 2);
+ if (z_id >= sdebug_capacity) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
+ res = check_condition_result;
+ goto fini;
+ }
+
+ zsp = zbc_zone(devip, z_id);
+ if (z_id != zsp->z_start) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
+ res = check_condition_result;
+ goto fini;
+ }
+ if (zbc_zone_is_conv(zsp)) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
+ res = check_condition_result;
+ goto fini;
+ }
+
+ zbc_rwp_zone(devip, zsp);
+fini:
+ write_unlock(macc_lckp);
+ return res;
+}
+
static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd)
{
u32 tag = blk_mq_unique_tag(cmnd->request);
@@ -4053,6 +4747,76 @@ static void sdebug_q_cmd_wq_complete(struct work_struct *work)
static bool got_shared_uuid;
static uuid_t shared_uuid;
+static int sdebug_device_create_zones(struct sdebug_dev_info *devip)
+{
+ struct sdeb_zone_state *zsp;
+ sector_t capacity = get_sdebug_capacity();
+ sector_t zstart = 0;
+ unsigned int i;
+
+ /*
+ * Set the zone size: if zbc_zone_size_mb is not set, figure out a
+ * zone size allowing for at least 4 zones on the device. Otherwise,
+ * use the specified zone size checking that at least 2 zones can be
+ * created for the device.
+ */
+ if (!zbc_zone_size_mb) {
+ devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M)
+ >> ilog2(sdebug_sector_size);
+ while (capacity < devip->zsize << 2 && devip->zsize >= 2)
+ devip->zsize >>= 1;
+ if (devip->zsize < 2) {
+ pr_err("Device capacity too small\n");
+ return -EINVAL;
+ }
+ } else {
+ devip->zsize = (zbc_zone_size_mb * SZ_1M)
+ >> ilog2(sdebug_sector_size);
+ if (devip->zsize >= capacity) {
+ pr_err("Zone size too large for device capacity\n");
+ return -EINVAL;
+ }
+ }
+
+ if (is_power_of_2(devip->zsize))
+ devip->zsize_shift = ilog2(devip->zsize);
+ devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift;
+
+ /* zbc_max_open_zones can be 0, meaning "not reported" (no limit) */
+ if (zbc_max_open_zones >= devip->nr_zones - 1)
+ devip->max_open = (devip->nr_zones - 1) / 2;
+ else
+ devip->max_open = zbc_max_open_zones;
+
+ devip->zstate = kcalloc(devip->nr_zones,
+ sizeof(struct sdeb_zone_state), GFP_KERNEL);
+ if (!devip->zstate)
+ return -ENOMEM;
+
+ for (i = 0; i < devip->nr_zones; i++) {
+ zsp = &devip->zstate[i];
+
+ zsp->z_start = zstart;
+
+ if (i == 0) {
+ zsp->z_cond = ZBC_NOT_WRITE_POINTER;
+ zsp->z_wp = (sector_t)-1;
+ } else {
+ zsp->z_cond = ZC1_EMPTY;
+ zsp->z_wp = zsp->z_start;
+ }
+
+ if (zsp->z_start + devip->zsize < capacity)
+ zsp->z_size = devip->zsize;
+ else
+ zsp->z_size = capacity - zsp->z_start;
+
+ zstart += zsp->z_size;
+ }
+
+ return 0;
+}
+
static struct sdebug_dev_info *sdebug_device_create(
struct sdebug_host_info *sdbg_host, gfp_t flags)
{
@@ -4072,6 +4836,13 @@ static struct sdebug_dev_info *sdebug_device_create(
}
}
devip->sdbg_host = sdbg_host;
+ if (sdeb_zbc_in_use) {
+ if (sdebug_device_create_zones(devip)) {
+ kfree(devip);
+ return NULL;
+ }
+ }
+ devip->sdbg_host = sdbg_host;
list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
}
return devip;
@@ -5059,7 +5830,13 @@ static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
{
int n;
+ /* Cannot change from or to TYPE_ZBC with sysfs */
+ if (sdebug_ptype == TYPE_ZBC)
+ return -EINVAL;
+
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
+ if (n == TYPE_ZBC)
+ return -EINVAL;
sdebug_ptype = n;
return count;
}
@@ -5318,6 +6095,10 @@ static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
int n;
bool changed;
+ /* Ignore capacity change for ZBC drives for now */
+ if (sdeb_zbc_in_use)
+ return -ENOTSUPP;
+
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
changed = (sdebug_virtual_gb != n);
sdebug_virtual_gb = n;
@@ -5708,6 +6489,12 @@ static int __init scsi_debug_init(void)
for (k = 0; k < submit_queues; ++k)
spin_lock_init(&sdebug_q_arr[k].qc_lock);
+ /*
+ * check for host managed zoned block device specified with ptype=0x14.
+ */
+ if (sdebug_ptype == TYPE_ZBC)
+ sdeb_zbc_in_use = true;
+
if (sdebug_dev_size_mb < 1)
sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
sz = (unsigned long)sdebug_dev_size_mb * 1048576;
@@ -5999,6 +6786,7 @@ static int sdebug_add_host_helper(int per_host_idx)
list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
dev_list) {
list_del(&sdbg_devinfo->dev_list);
+ kfree(sdbg_devinfo->zstate);
kfree(sdbg_devinfo);
}
kfree(sdbg_host);
@@ -6410,6 +7198,7 @@ static int sdebug_driver_remove(struct device *dev)
list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
dev_list) {
list_del(&sdbg_devinfo->dev_list);
+ kfree(sdbg_devinfo->zstate);
kfree(sdbg_devinfo);
}
--
2.25.3
