diff options
| -rw-r--r-- | drivers/scsi/scsi_debug.c | 326 |
1 files changed, 307 insertions, 19 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 2181427a1ea5..aa4b6b80aade 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -307,7 +307,6 @@ static const unsigned char opcode_ind_arr[256] = { #define FF_SA (F_SA_HIGH | F_SA_LOW) struct sdebug_dev_info; -static int scsi_debug_queuecommand(struct scsi_cmnd *scp); static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *); @@ -322,9 +321,12 @@ 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_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 *); +static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_xdwriteread_10(struct scsi_cmnd *, struct sdebug_dev_info *); +static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *); struct opcode_info_t { u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff @@ -383,10 +385,10 @@ static const struct opcode_info_t vl_iarr[1] = { /* VARIABLE LENGTH */ }; static const struct opcode_info_t maint_in_iarr[2] = { - {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, NULL, NULL, + {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL, {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0, 0} }, - {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, NULL, NULL, + {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL, {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0, 0} }, }; @@ -487,7 +489,7 @@ static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = { {0, 0x35, 0, F_DELAY_OVERR | FF_DIRECT_IO, NULL, NULL, /* SYNC_CACHE */ {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, - {0, 0x89, 0, F_D_OUT | FF_DIRECT_IO, NULL, NULL, + {0, 0x89, 0, F_D_OUT | FF_DIRECT_IO, resp_comp_write, NULL, {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0x1f, 0xc7} }, /* COMPARE AND WRITE */ @@ -1603,6 +1605,184 @@ static int resp_report_tgtpgs(struct scsi_cmnd * scp, return ret; } +static int +resp_rsup_opcodes(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) +{ + bool rctd; + u8 reporting_opts, req_opcode, sdeb_i, supp; + u16 req_sa, u; + u32 alloc_len, a_len; + int k, offset, len, errsts, count, bump, na; + const struct opcode_info_t *oip; + const struct opcode_info_t *r_oip; + u8 *arr; + u8 *cmd = scp->cmnd; + + rctd = !!(cmd[2] & 0x80); + reporting_opts = cmd[2] & 0x7; + req_opcode = cmd[3]; + req_sa = get_unaligned_be16(cmd + 4); + alloc_len = get_unaligned_be32(cmd + 6); + if (alloc_len < 4 && alloc_len > 0xffff) { + mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); + return check_condition_result; + } + if (alloc_len > 8192) + a_len = 8192; + else + a_len = alloc_len; + arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_KERNEL); + if (NULL == arr) { + mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, + INSUFF_RES_ASCQ); + return check_condition_result; + } + switch (reporting_opts) { + case 0: /* all commands */ + /* count number of commands */ + for (count = 0, oip = opcode_info_arr; + oip->num_attached != 0xff; ++oip) { + if (F_INV_OP & oip->flags) + continue; + count += (oip->num_attached + 1); + } + bump = rctd ? 20 : 8; + put_unaligned_be32(count * bump, arr); + for (offset = 4, oip = opcode_info_arr; + oip->num_attached != 0xff && offset < a_len; ++oip) { + if (F_INV_OP & oip->flags) + continue; + na = oip->num_attached; + arr[offset] = oip->opcode; + put_unaligned_be16(oip->sa, arr + offset + 2); + if (rctd) + arr[offset + 5] |= 0x2; + if (FF_SA & oip->flags) + arr[offset + 5] |= 0x1; + put_unaligned_be16(oip->len_mask[0], arr + offset + 6); + if (rctd) + put_unaligned_be16(0xa, arr + offset + 8); + r_oip = oip; + for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) { + if (F_INV_OP & oip->flags) + continue; + offset += bump; + arr[offset] = oip->opcode; + put_unaligned_be16(oip->sa, arr + offset + 2); + if (rctd) + arr[offset + 5] |= 0x2; + if (FF_SA & oip->flags) + arr[offset + 5] |= 0x1; + put_unaligned_be16(oip->len_mask[0], + arr + offset + 6); + if (rctd) + put_unaligned_be16(0xa, + arr + offset + 8); + } + oip = r_oip; + offset += bump; + } + break; + case 1: /* one command: opcode only */ + case 2: /* one command: opcode plus service action */ + case 3: /* one command: if sa==0 then opcode only else opcode+sa */ + sdeb_i = opcode_ind_arr[req_opcode]; + oip = &opcode_info_arr[sdeb_i]; + if (F_INV_OP & oip->flags) { + supp = 1; + offset = 4; + } else { + if (1 == reporting_opts) { + if (FF_SA & oip->flags) { + mk_sense_invalid_fld(scp, SDEB_IN_CDB, + 2, 2); + kfree(arr); + return check_condition_result; + } + req_sa = 0; + } else if (2 == reporting_opts && + 0 == (FF_SA & oip->flags)) { + mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1); + kfree(arr); /* point at requested sa */ + return check_condition_result; + } + if (0 == (FF_SA & oip->flags) && + req_opcode == oip->opcode) + supp = 3; + else if (0 == (FF_SA & oip->flags)) { + na = oip->num_attached; + for (k = 0, oip = oip->arrp; k < na; + ++k, ++oip) { + if (req_opcode == oip->opcode) + break; + } + supp = (k >= na) ? 1 : 3; + } else if (req_sa != oip->sa) { + na = oip->num_attached; + for (k = 0, oip = oip->arrp; k < na; + ++k, ++oip) { + if (req_sa == oip->sa) + break; + } + supp = (k >= na) ? 1 : 3; + } else + supp = 3; + if (3 == supp) { + u = oip->len_mask[0]; + put_unaligned_be16(u, arr + 2); + arr[4] = oip->opcode; + for (k = 1; k < u; ++k) + arr[4 + k] = (k < 16) ? + oip->len_mask[k] : 0xff; + offset = 4 + u; + } else + offset = 4; + } + arr[1] = (rctd ? 0x80 : 0) | supp; + if (rctd) { + put_unaligned_be16(0xa, arr + offset); + offset += 12; + } + break; + default: + mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2); + kfree(arr); + return check_condition_result; + } + offset = (offset < a_len) ? offset : a_len; + len = (offset < alloc_len) ? offset : alloc_len; + errsts = fill_from_dev_buffer(scp, arr, len); + kfree(arr); + return errsts; +} + +static int +resp_rsup_tmfs(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) +{ + bool repd; + u32 alloc_len, len; + u8 arr[16]; + u8 *cmd = scp->cmnd; + + memset(arr, 0, sizeof(arr)); + repd = !!(cmd[2] & 0x80); + alloc_len = get_unaligned_be32(cmd + 6); + if (alloc_len < 4) { + mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); + return check_condition_result; + } + arr[0] = 0xc8; /* ATS | ATSS | LURS */ + arr[1] = 0x1; /* ITNRS */ + if (repd) { + arr[3] = 0xc; + len = 16; + } else + len = 4; + + len = (len < alloc_len) ? len : alloc_len; + return fill_from_dev_buffer(scp, arr, len); +} + /* <<Following mode page info copied from ST318451LW>> */ static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target) @@ -2165,6 +2345,38 @@ do_device_access(struct scsi_cmnd *scmd, u64 lba, u32 num, bool do_write) return ret; } +/* If fake_store(lba,num) compares equal to arr(num), then copy top half of + * arr into fake_store(lba,num) and return true. If comparison fails then + * return false. */ +static bool +comp_write_worker(u64 lba, u32 num, const u8 *arr) +{ + bool res; + u64 block, rest = 0; + u32 store_blks = sdebug_store_sectors; + u32 lb_size = scsi_debug_sector_size; + + block = do_div(lba, store_blks); + if (block + num > store_blks) + rest = block + num - store_blks; + + res = !memcmp(fake_storep + (block * lb_size), arr, + (num - rest) * lb_size); + if (!res) + return res; + if (rest) + res = memcmp(fake_storep, arr + ((num - rest) * lb_size), + rest * lb_size); + if (!res) + return res; + arr += num * lb_size; + memcpy(fake_storep + (block * lb_size), arr, (num - rest) * lb_size); + if (rest) + memcpy(fake_storep, arr + ((num - rest) * lb_size), + rest * lb_size); + return res; +} + static __be16 dif_compute_csum(const void *buf, int len) { __be16 csum; @@ -2821,6 +3033,82 @@ resp_write_same_16(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) return resp_write_same(scp, lba, num, ei_lba, unmap, ndob); } +static int +resp_comp_write(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) +{ + u8 *cmd = scp->cmnd; + u8 *arr; + u8 *fake_storep_hold; + u64 lba; + u32 dnum; + u32 lb_size = scsi_debug_sector_size; + u8 num; + unsigned long iflags; + int ret; + + lba = get_unaligned_be32(cmd + 2); + num = cmd[13]; /* 1 to a maximum of 255 logical blocks */ + if (0 == num) + return 0; /* degenerate case, not an error */ + dnum = 2 * num; + arr = kzalloc(dnum * lb_size, GFP_ATOMIC); + if (NULL == arr) { + mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, + INSUFF_RES_ASCQ); + return check_condition_result; + } + if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && + (cmd[1] & 0xe0)) { + mk_sense_invalid_opcode(scp); + return check_condition_result; + } + if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION || + scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) && + (cmd[1] & 0xe0) == 0) + sdev_printk(KERN_ERR, scp->device, "Unprotected WR " + "to DIF device\n"); + + /* inline check_device_access_params() */ + if (lba + num > sdebug_capacity) { + mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); + return check_condition_result; + } + /* transfer length excessive (tie in to block limits VPD page) */ + if (num > sdebug_store_sectors) { + /* needs work to find which cdb byte 'num' comes from */ + mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); + return check_condition_result; + } + + write_lock_irqsave(&atomic_rw, iflags); + + /* trick do_device_access() to fetch both compare and write buffers + * from data-in into arr. Safe (atomic) since write_lock held. */ + fake_storep_hold = fake_storep; + fake_storep = arr; + ret = do_device_access(scp, 0, dnum, true); + fake_storep = fake_storep_hold; + if (ret == -1) { + write_unlock_irqrestore(&atomic_rw, iflags); + kfree(arr); + return DID_ERROR << 16; + } else if ((ret < (dnum * lb_size)) && + (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) + sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb " + "indicated=%u, IO sent=%d bytes\n", my_name, + dnum * lb_size, ret); + if (!comp_write_worker(lba, num, arr)) { + write_unlock_irqrestore(&atomic_rw, iflags); + kfree(arr); + mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0); + return check_condition_result; + } + if (scsi_debug_lbp()) + map_region(lba, num); + write_unlock_irqrestore(&atomic_rw, iflags); + return 0; +} + struct unmap_block_desc { __be64 lba; __be32 blocks; @@ -4669,21 +4957,6 @@ static void sdebug_remove_adapter(void) } 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 num_in_q = 0; @@ -4912,6 +5185,21 @@ check_cond: return schedule_resp(scp, devip, check_condition_result, 0); } +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 struct scsi_host_template sdebug_driver_template = { .show_info = scsi_debug_show_info, .write_info = scsi_debug_write_info, |