Add resp_write_scat() function to support decoding WRITE SCATTERED
(16 and 32). Also weave resp_write_scat() into the cdb decoding
logic. Split SDEB_I_SERV_ACT_IN into 12 and 16 byte variants
(similarly for SERV_ACT_OUT). As yet the driver doesn't need
either of the 12 byte variants.
Signed-off-by: Douglas Gilbert <dgilbert@xxxxxxxxxxxx>
---
drivers/scsi/scsi_debug.c | 207 ++++++++++++++++++++++++++++++++++++++++++----
1 file changed, 192 insertions(+), 15 deletions(-)
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 707c24155fd0..a0f61e7df4b4 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -93,6 +93,7 @@ static const char *sdebug_version_date = "20171202";
#define MISCOMPARE_VERIFY_ASC 0x1d
#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
+#define WRITE_ERROR_ASC 0xc
/* Additional Sense Code Qualifier (ASCQ) */
#define ACK_NAK_TO 0x3
@@ -323,12 +324,12 @@ enum sdeb_opcode_index {
SDEB_I_READ = 9, /* 6, 10, 12, 16 */
SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
SDEB_I_START_STOP = 11,
- SDEB_I_SERV_ACT_IN = 12, /* 12, 16 */
- SDEB_I_SERV_ACT_OUT = 13, /* 12, 16 */
+ SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */
+ SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */
SDEB_I_MAINT_IN = 14,
SDEB_I_MAINT_OUT = 15,
SDEB_I_VERIFY = 16, /* 10 only */
- SDEB_I_VARIABLE_LEN = 17,
+ SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */
SDEB_I_RESERVE = 18, /* 6, 10 */
SDEB_I_RELEASE = 19, /* 6, 10 */
SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
@@ -373,12 +374,12 @@ 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, 0,
0, 0, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN, SDEB_I_SERV_ACT_OUT,
+ 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,
SDEB_I_MAINT_OUT, 0, 0, 0,
- SDEB_I_READ, SDEB_I_SERV_ACT_OUT, SDEB_I_WRITE, SDEB_I_SERV_ACT_IN,
- 0, 0, 0, 0,
+ SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE,
+ 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
/* 0xc0; 0xc0->0xff: vendor specific */
@@ -397,6 +398,7 @@ static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
+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 *);
@@ -448,10 +450,13 @@ static const struct opcode_info_t sa_in_iarr[1] = {
0xff, 0xff, 0xff, 0, 0xc7} },
};
-static const struct opcode_info_t vl_iarr[1] = { /* VARIABLE LENGTH */
+static const struct opcode_info_t vl_iarr[2] = { /* VARIABLE LENGTH */
{0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_DIRECT_IO, resp_write_dt0,
- NULL, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0xb, 0xfa,
- 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
+ NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa,
+ 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
+ {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_DIRECT_IO, resp_write_scat,
+ NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8,
+ 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */
};
static const struct opcode_info_t maint_in_iarr[2] = {
@@ -518,9 +523,10 @@ static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
{6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{1, 0x9e, 0x10, F_SA_LOW | F_D_IN, resp_readcap16, sa_in_iarr,
{16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0x1, 0xc7} }, /* READ CAPACITY(16) */
- {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* SA OUT */
- {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
+ 0xff, 0xff, 0xff, 0x1, 0xc7} },/* SA_IN(16), READ CAPACITY(16) */
+ {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT, resp_write_scat, NULL,
+ {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCATTERED(16) */
{2, 0xa3, 0xa, F_SA_LOW | F_D_IN, resp_report_tgtpgs, maint_in_iarr,
{12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0,
0} },
@@ -529,9 +535,9 @@ static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
{0, 0x2f, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, NULL, NULL, /* VERIFY(10) */
{10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7,
0, 0, 0, 0, 0, 0} },
- {1, 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_DIRECT_IO, resp_read_dt0,
- vl_iarr, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0x9, 0xfe, 0,
- 0xff, 0xff, 0xff, 0xff} },/* VARIABLE LENGTH, READ(32) */
+ {2, 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_DIRECT_IO, resp_read_dt0,
+ vl_iarr, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0,
+ 0xff, 0xff, 0xff, 0xff} }, /* VARIABLE LENGTH, READ(32) */
{1, 0x56, 0, F_D_OUT, NULL, reserve_iarr, /* RESERVE(10) */
{10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
0} },
@@ -3030,6 +3036,177 @@ static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
return 0;
}
+/*
+ * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32).
+ * No READ GATHERED yet (requires bidi or long cdb holding gather list).
+ */
+static int resp_write_scat(struct scsi_cmnd *scp,
+ struct sdebug_dev_info *devip)
+{
+ u8 *cmd = scp->cmnd;
+ u8 *lrdp = NULL;
+ u8 *up;
+ u8 wrprotect;
+ u16 lbdof, num_lrd, k;
+ u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb;
+ u32 lb_size = sdebug_sector_size;
+ u32 ei_lba;
+ u64 lba;
+ unsigned long iflags;
+ int ret, res;
+ bool check_prot, is_16;
+ static const u32 lrd_size = 32; /* + parameter list header size */
+
+ if (cmd[0] == VARIABLE_LENGTH_CMD) {
+ is_16 = false;
+ wrprotect = (cmd[10] >> 5) & 0x7;
+ lbdof = get_unaligned_be16(cmd + 12);
+ num_lrd = get_unaligned_be16(cmd + 16);
+ bt_len = get_unaligned_be32(cmd + 28);
+ check_prot = false;
+ } else { /* that leaves WRITE SCATTERED(16) */
+ is_16 = true;
+ wrprotect = (cmd[2] >> 5) & 0x7;
+ lbdof = get_unaligned_be16(cmd + 4);
+ num_lrd = get_unaligned_be16(cmd + 8);
+ bt_len = get_unaligned_be32(cmd + 10);
+ check_prot = true;
+ }
+ if (unlikely(have_dif_prot && check_prot)) {
+ if (sdebug_dif == T10_PI_TYPE2_PROTECTION && wrprotect) {
+ mk_sense_invalid_opcode(scp);
+ return illegal_condition_result;
+ }
+ if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
+ sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
+ wrprotect == 0)
+ sdev_printk(KERN_ERR, scp->device,
+ "Unprotected WR to DIF device\n");
+ }
+ if ((num_lrd == 0) || (bt_len == 0))
+ return 0; /* T10 says these do-nothings are not errors */
+ if ((lbdof == 0) || (lbdof >= bt_len)) {
+ if (sdebug_verbose)
+ sdev_printk(KERN_INFO, scp->device,
+ "%s: %s: LB Data Offset field bad\n",
+ my_name, __func__);
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
+ return illegal_condition_result;
+ }
+ lbdof_blen = lbdof * lb_size;
+ if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) {
+ if (sdebug_verbose)
+ sdev_printk(KERN_INFO, scp->device,
+ "%s: %s: LBA range descriptors don't fit\n",
+ my_name, __func__);
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
+ return illegal_condition_result;
+ }
+ lrdp = kzalloc(lbdof_blen, GFP_ATOMIC);
+ if (lrdp == NULL) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
+ INSUFF_RES_ASCQ);
+ return illegal_condition_result;
+ }
+ if (sdebug_verbose)
+ sdev_printk(KERN_INFO, scp->device,
+ "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n",
+ my_name, __func__, lbdof_blen);
+ res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen);
+ if (res == -1) {
+ ret = DID_ERROR << 16;
+ goto err_out;
+ }
+
+ write_lock_irqsave(&atomic_rw, iflags);
+ sg_off = lbdof_blen;
+ /* Spec says Buffer xfer Length field in number of LBs in dout */
+ cum_lb = 0;
+ for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) {
+ lba = get_unaligned_be64(up + 0);
+ num = get_unaligned_be32(up + 8);
+ if (sdebug_verbose)
+ sdev_printk(KERN_INFO, scp->device,
+ "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n",
+ my_name, __func__, k, lba, num, sg_off);
+ if (num == 0)
+ continue;
+ ret = check_device_access_params(scp, lba, num);
+ if (ret)
+ goto err_out_unlock;
+ num_by = num * lb_size;
+ ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12);
+
+ if ((cum_lb + num) > bt_len) {
+ if (sdebug_verbose)
+ sdev_printk(KERN_INFO, scp->device,
+ "%s: %s: sum of blocks > data provided\n",
+ my_name, __func__);
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC,
+ 0);
+ ret = illegal_condition_result;
+ goto err_out_unlock;
+ }
+
+ /* DIX + T10 DIF */
+ if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
+ int prot_ret = prot_verify_write(scp, lba, num,
+ ei_lba);
+
+ if (prot_ret) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10,
+ prot_ret);
+ ret = illegal_condition_result;
+ goto err_out_unlock;
+ }
+ }
+
+ ret = do_device_access(scp, sg_off, lba, num, true);
+ if (unlikely(scsi_debug_lbp()))
+ map_region(lba, num);
+ if (unlikely(-1 == ret)) {
+ ret = DID_ERROR << 16;
+ goto err_out_unlock;
+ } else if (unlikely(sdebug_verbose && (ret < num_by)))
+ sdev_printk(KERN_INFO, scp->device,
+ "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
+ my_name, num_by, ret);
+
+ if (unlikely(sdebug_any_injecting_opt)) {
+ struct sdebug_queued_cmd *sqcp =
+ (struct sdebug_queued_cmd *)scp->host_scribble;
+
+ if (sqcp) {
+ if (sqcp->inj_recovered) {
+ mk_sense_buffer(scp, RECOVERED_ERROR,
+ THRESHOLD_EXCEEDED, 0);
+ ret = illegal_condition_result;
+ goto err_out_unlock;
+ } else if (sqcp->inj_dif) {
+ /* Logical block guard check failed */
+ mk_sense_buffer(scp, ABORTED_COMMAND,
+ 0x10, 1);
+ ret = illegal_condition_result;
+ goto err_out_unlock;
+ } else if (sqcp->inj_dix) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST,
+ 0x10, 1);
+ ret = illegal_condition_result;
+ goto err_out_unlock;
+ }
+ }
+ }
+ sg_off += num_by;
+ cum_lb += num;
+ }
+ ret = 0;
+err_out_unlock:
+ write_unlock_irqrestore(&atomic_rw, iflags);
+err_out:
+ kfree(lrdp);
+ return ret;
+}
+
static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
u32 ei_lba, bool unmap, bool ndob)
{
--
2.14.1
