}
static int
-target_emulate_inquiry_std(struct se_cmd *cmd)
+target_emulate_inquiry_std(struct se_cmd *cmd, char *buf)
{
struct se_lun *lun = cmd->se_lun;
struct se_device *dev = cmd->se_dev;
struct se_portal_group *tpg = lun->lun_sep->sep_tpg;
- unsigned char *buf;
-
- /*
- * Make sure we at least have 6 bytes of INQUIRY response
- * payload going back for EVPD=0
- */
- if (cmd->data_length < 6) {
- pr_err("SCSI Inquiry payload length: %u"
- " too small for EVPD=0\n", cmd->data_length);
- return -EINVAL;
- }
-
- buf = transport_kmap_data_sg(cmd);
if (dev == tpg->tpg_virt_lun0.lun_se_dev) {
buf[0] = 0x3f; /* Not connected */
if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED)
target_fill_alua_data(lun->lun_sep, buf);
- if (cmd->data_length < 8) {
- buf[4] = 1; /* Set additional length to 1 */
- goto out;
- }
-
buf[7] = 0x32; /* Sync=1 and CmdQue=1 */
- /*
- * Do not include vendor, product, reversion info in INQUIRY
- * response payload for cdbs with a small allocation length.
- */
- if (cmd->data_length < 36) {
- buf[4] = 3; /* Set additional length to 3 */
- goto out;
- }
-
snprintf(&buf[8], 8, "LIO-ORG");
snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model);
snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision);
buf[4] = 31; /* Set additional length to 31 */
-out:
- transport_kunmap_data_sg(cmd);
return 0;
}
unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial);
unit_serial_len++; /* For NULL Terminator */
- if (((len + 4) + unit_serial_len) > cmd->data_length) {
- len += unit_serial_len;
- buf[2] = ((len >> 8) & 0xff);
- buf[3] = (len & 0xff);
- return 0;
- }
len += sprintf(&buf[4], "%s",
dev->se_sub_dev->t10_wwn.unit_serial);
len++; /* Extra Byte for NULL Terminator */
if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL))
goto check_t10_vend_desc;
- if (off + 20 > cmd->data_length)
- goto check_t10_vend_desc;
-
/* CODE SET == Binary */
buf[off++] = 0x1;
strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]);
unit_serial_len++; /* For NULL Terminator */
- if ((len + (id_len + 4) +
- (prod_len + unit_serial_len)) >
- cmd->data_length) {
- len += (prod_len + unit_serial_len);
- goto check_port;
- }
id_len += sprintf(&buf[off+12], "%s:%s", prod,
&dev->se_sub_dev->t10_wwn.unit_serial[0]);
}
/*
* struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
*/
-check_port:
port = lun->lun_sep;
if (port) {
struct t10_alua_lu_gp *lu_gp;
* Get the PROTOCOL IDENTIFIER as defined by spc4r17
* section 7.5.1 Table 362
*/
- if (((len + 4) + 8) > cmd->data_length) {
- len += 8;
- goto check_tpgi;
- }
buf[off] =
(tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
buf[off++] |= 0x1; /* CODE SET == Binary */
* Get the PROTOCOL IDENTIFIER as defined by spc4r17
* section 7.5.1 Table 362
*/
-check_tpgi:
if (dev->se_sub_dev->t10_alua.alua_type !=
SPC3_ALUA_EMULATED)
goto check_scsi_name;
- if (((len + 4) + 8) > cmd->data_length) {
- len += 8;
- goto check_lu_gp;
- }
tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
if (!tg_pt_gp_mem)
goto check_lu_gp;
* section 7.7.3.8
*/
check_lu_gp:
- if (((len + 4) + 8) > cmd->data_length) {
- len += 8;
- goto check_scsi_name;
- }
lu_gp_mem = dev->dev_alua_lu_gp_mem;
if (!lu_gp_mem)
goto check_scsi_name;
/* Header size + Designation descriptor */
scsi_name_len += 4;
- if (((len + 4) + scsi_name_len) > cmd->data_length) {
- len += scsi_name_len;
- goto set_len;
- }
buf[off] =
(tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
buf[off++] |= 0x3; /* CODE SET == UTF-8 */
/* Header size + Designation descriptor */
len += (scsi_name_len + 4);
}
-set_len:
buf[2] = ((len >> 8) & 0xff);
buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
return 0;
static int
target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
{
- if (cmd->data_length < 60)
- return 0;
-
buf[3] = 0x3c;
/* Set HEADSUP, ORDSUP, SIMPSUP */
buf[5] = 0x07;
if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
have_tp = 1;
- if (cmd->data_length < (0x10 + 4)) {
- pr_debug("Received data_length: %u"
- " too small for EVPD 0xb0\n",
- cmd->data_length);
- return -EINVAL;
- }
-
- if (have_tp && cmd->data_length < (0x3c + 4)) {
- pr_debug("Received data_length: %u"
- " too small for TPE=1 EVPD 0xb0\n",
- cmd->data_length);
- have_tp = 0;
- }
-
buf[0] = dev->transport->get_device_type(dev);
buf[3] = have_tp ? 0x3c : 0x10;
put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]);
/*
- * Exit now if we don't support TP or the initiator sent a too
- * short buffer.
+ * Exit now if we don't support TP.
*/
- if (!have_tp || cmd->data_length < (0x3c + 4))
+ if (!have_tp)
return 0;
/*
buf[0] = dev->transport->get_device_type(dev);
buf[3] = 0x3c;
-
- if (cmd->data_length >= 5 &&
- dev->se_sub_dev->se_dev_attrib.is_nonrot)
- buf[5] = 1;
+ buf[5] = dev->se_sub_dev->se_dev_attrib.is_nonrot ? 1 : 0;
return 0;
}
{
int p;
- if (cmd->data_length < 8)
- return 0;
/*
* Only report the INQUIRY EVPD=1 pages after a valid NAA
* Registered Extended LUN WWN has been set via ConfigFS
if (cmd->se_dev->se_sub_dev->su_dev_flags &
SDF_EMULATED_VPD_UNIT_SERIAL) {
buf[3] = ARRAY_SIZE(evpd_handlers);
- for (p = 0; p < min_t(int, ARRAY_SIZE(evpd_handlers),
- cmd->data_length - 4); ++p)
+ for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p)
buf[p + 4] = evpd_handlers[p].page;
}
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = cmd->se_dev;
- unsigned char *buf;
+ unsigned char *buf, *map_buf;
unsigned char *cdb = cmd->t_task_cdb;
int p, ret;
+ map_buf = transport_kmap_data_sg(cmd);
+ /*
+ * If SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is not set, then we
+ * know we actually allocated a full page. Otherwise, if the
+ * data buffer is too small, allocate a temporary buffer so we
+ * don't have to worry about overruns in all our INQUIRY
+ * emulation handling.
+ */
+ if (cmd->data_length < SE_INQUIRY_BUF &&
+ (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) {
+ buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL);
+ if (!buf) {
+ transport_kunmap_data_sg(cmd);
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return -ENOMEM;
+ }
+ } else {
+ buf = map_buf;
+ }
+
if (!(cdb[1] & 0x1)) {
if (cdb[2]) {
pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n",
cdb[2]);
cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
- ret = target_emulate_inquiry_std(cmd);
+ ret = target_emulate_inquiry_std(cmd, buf);
goto out;
}
- /*
- * Make sure we at least have 4 bytes of INQUIRY response
- * payload for 0x00 going back for EVPD=1. Note that 0x80
- * and 0x83 will check for enough payload data length and
- * jump to set_len: label when there is not enough inquiry EVPD
- * payload length left for the next outgoing EVPD metadata
- */
- if (cmd->data_length < 4) {
- pr_err("SCSI Inquiry payload length: %u"
- " too small for EVPD=1\n", cmd->data_length);
- cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
- return -EINVAL;
- }
-
- buf = transport_kmap_data_sg(cmd);
-
buf[0] = dev->transport->get_device_type(dev);
for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) {
if (cdb[2] == evpd_handlers[p].page) {
buf[1] = cdb[2];
ret = evpd_handlers[p].emulate(cmd, buf);
- goto out_unmap;
+ goto out;
}
}
cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
ret = -EINVAL;
-out_unmap:
- transport_kunmap_data_sg(cmd);
out:
+ if (buf != map_buf) {
+ memcpy(map_buf, buf, cmd->data_length);
+ kfree(buf);
+ }
+ transport_kunmap_data_sg(cmd);
+
if (!ret) {
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
projects / deliverable / linux.git / commitdiff
