{
struct se_device *dev = cmd->se_dev;
struct se_session *sess = cmd->se_sess;
+ int pi_prot_type = dev->dev_attrib.pi_prot_type;
+
unsigned char *rbuf;
unsigned char buf[32];
unsigned long long blocks = dev->transport->get_blocks(dev);
* Set P_TYPE and PROT_EN bits for DIF support
*/
if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) {
- if (dev->dev_attrib.pi_prot_type)
- buf[12] = (dev->dev_attrib.pi_prot_type - 1) << 1 | 0x1;
+ /*
+ * Only override a device's pi_prot_type if no T10-PI is
+ * available, and sess_prot_type has been explicitly enabled.
+ */
+ if (!pi_prot_type)
+ pi_prot_type = sess->sess_prot_type;
+
+ if (pi_prot_type)
+ buf[12] = (pi_prot_type - 1) << 1 | 0x1;
}
if (dev->transport->get_lbppbe)
return 0;
}
-static sense_reason_t xdreadwrite_callback(struct se_cmd *cmd)
+static sense_reason_t xdreadwrite_callback(struct se_cmd *cmd, bool success)
{
unsigned char *buf, *addr;
struct scatterlist *sg;
cmd->data_direction);
}
-static sense_reason_t compare_and_write_post(struct se_cmd *cmd)
+static sense_reason_t compare_and_write_post(struct se_cmd *cmd, bool success)
{
struct se_device *dev = cmd->se_dev;
return TCM_NO_SENSE;
}
-static sense_reason_t compare_and_write_callback(struct se_cmd *cmd)
+static sense_reason_t compare_and_write_callback(struct se_cmd *cmd, bool success)
{
struct se_device *dev = cmd->se_dev;
struct scatterlist *write_sg = NULL, *sg;
/*
* Handle early failure in transport_generic_request_failure(),
- * which will not have taken ->caw_mutex yet..
+ * which will not have taken ->caw_sem yet..
*/
- if (!cmd->t_data_sg || !cmd->t_bidi_data_sg)
+ if (!success && (!cmd->t_data_sg || !cmd->t_bidi_data_sg))
return TCM_NO_SENSE;
+ /*
+ * Handle special case for zero-length COMPARE_AND_WRITE
+ */
+ if (!cmd->data_length)
+ goto out;
/*
* Immediately exit + release dev->caw_sem if command has already
* been failed with a non-zero SCSI status.
* comparision using SGLs at cmd->t_bidi_data_sg..
*/
rc = down_interruptible(&dev->caw_sem);
- if ((rc != 0) || signal_pending(current)) {
+ if (rc != 0) {
cmd->transport_complete_callback = NULL;
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
}
}
static int
-sbc_set_prot_op_checks(u8 protect, enum target_prot_type prot_type,
+sbc_set_prot_op_checks(u8 protect, bool fabric_prot, enum target_prot_type prot_type,
bool is_write, struct se_cmd *cmd)
{
if (is_write) {
- cmd->prot_op = protect ? TARGET_PROT_DOUT_PASS :
- TARGET_PROT_DOUT_INSERT;
+ cmd->prot_op = fabric_prot ? TARGET_PROT_DOUT_STRIP :
+ protect ? TARGET_PROT_DOUT_PASS :
+ TARGET_PROT_DOUT_INSERT;
switch (protect) {
case 0x0:
case 0x3:
return -EINVAL;
}
} else {
- cmd->prot_op = protect ? TARGET_PROT_DIN_PASS :
- TARGET_PROT_DIN_STRIP;
+ cmd->prot_op = fabric_prot ? TARGET_PROT_DIN_INSERT :
+ protect ? TARGET_PROT_DIN_PASS :
+ TARGET_PROT_DIN_STRIP;
switch (protect) {
case 0x0:
case 0x1:
u32 sectors, bool is_write)
{
u8 protect = cdb[1] >> 5;
+ int sp_ops = cmd->se_sess->sup_prot_ops;
+ int pi_prot_type = dev->dev_attrib.pi_prot_type;
+ bool fabric_prot = false;
if (!cmd->t_prot_sg || !cmd->t_prot_nents) {
- if (protect && !dev->dev_attrib.pi_prot_type) {
- pr_err("CDB contains protect bit, but device does not"
- " advertise PROTECT=1 feature bit\n");
+ if (unlikely(protect &&
+ !dev->dev_attrib.pi_prot_type && !cmd->se_sess->sess_prot_type)) {
+ pr_err("CDB contains protect bit, but device + fabric does"
+ " not advertise PROTECT=1 feature bit\n");
return TCM_INVALID_CDB_FIELD;
}
if (cmd->prot_pto)
cmd->reftag_seed = cmd->t_task_lba;
break;
case TARGET_DIF_TYPE0_PROT:
+ /*
+ * See if the fabric supports T10-PI, and the session has been
+ * configured to allow export PROTECT=1 feature bit with backend
+ * devices that don't support T10-PI.
+ */
+ fabric_prot = is_write ?
+ !!(sp_ops & (TARGET_PROT_DOUT_PASS | TARGET_PROT_DOUT_STRIP)) :
+ !!(sp_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DIN_INSERT));
+
+ if (fabric_prot && cmd->se_sess->sess_prot_type) {
+ pi_prot_type = cmd->se_sess->sess_prot_type;
+ break;
+ }
+ if (!protect)
+ return TCM_NO_SENSE;
+ /* Fallthrough */
default:
- return TCM_NO_SENSE;
+ pr_err("Unable to determine pi_prot_type for CDB: 0x%02x "
+ "PROTECT: 0x%02x\n", cdb[0], protect);
+ return TCM_INVALID_CDB_FIELD;
}
- if (sbc_set_prot_op_checks(protect, dev->dev_attrib.pi_prot_type,
- is_write, cmd))
+ if (sbc_set_prot_op_checks(protect, fabric_prot, pi_prot_type, is_write, cmd))
return TCM_INVALID_CDB_FIELD;
- cmd->prot_type = dev->dev_attrib.pi_prot_type;
+ cmd->prot_type = pi_prot_type;
cmd->prot_length = dev->prot_length * sectors;
/**
sdt = paddr + offset;
sdt->guard_tag = cpu_to_be16(crc_t10dif(daddr + j,
dev->dev_attrib.block_size));
- if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT)
+ if (cmd->prot_type == TARGET_DIF_TYPE1_PROT)
sdt->ref_tag = cpu_to_be32(sector & 0xffffffff);
sdt->app_tag = 0;
- pr_debug("DIF WRITE INSERT sector: %llu guard_tag: 0x%04x"
+ pr_debug("DIF %s INSERT sector: %llu guard_tag: 0x%04x"
" app_tag: 0x%04x ref_tag: %u\n",
- (unsigned long long)sector, sdt->guard_tag,
- sdt->app_tag, be32_to_cpu(sdt->ref_tag));
+ (cmd->data_direction == DMA_TO_DEVICE) ?
+ "WRITE" : "READ", (unsigned long long)sector,
+ sdt->guard_tag, sdt->app_tag,
+ be32_to_cpu(sdt->ref_tag));
sector++;
offset += sizeof(struct se_dif_v1_tuple);
}
static sense_reason_t
-sbc_dif_v1_verify(struct se_device *dev, struct se_dif_v1_tuple *sdt,
+sbc_dif_v1_verify(struct se_cmd *cmd, struct se_dif_v1_tuple *sdt,
const void *p, sector_t sector, unsigned int ei_lba)
{
+ struct se_device *dev = cmd->se_dev;
int block_size = dev->dev_attrib.block_size;
__be16 csum;
+ if (!(cmd->prot_checks & TARGET_DIF_CHECK_GUARD))
+ goto check_ref;
+
csum = cpu_to_be16(crc_t10dif(p, block_size));
if (sdt->guard_tag != csum) {
return TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
}
- if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT &&
+check_ref:
+ if (!(cmd->prot_checks & TARGET_DIF_CHECK_REFTAG))
+ return 0;
+
+ if (cmd->prot_type == TARGET_DIF_TYPE1_PROT &&
be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
pr_err("DIFv1 Type 1 reference failed on sector: %llu tag: 0x%08x"
" sector MSB: 0x%08x\n", (unsigned long long)sector,
return TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
}
- if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE2_PROT &&
+ if (cmd->prot_type == TARGET_DIF_TYPE2_PROT &&
be32_to_cpu(sdt->ref_tag) != ei_lba) {
pr_err("DIFv1 Type 2 reference failed on sector: %llu tag: 0x%08x"
" ei_lba: 0x%08x\n", (unsigned long long)sector,
unsigned int i, len, left;
unsigned int offset = sg_off;
+ if (!sg)
+ return;
+
left = sectors * dev->prot_length;
for_each_sg(cmd->t_prot_sg, psg, cmd->t_prot_nents, i) {
(unsigned long long)sector, sdt->guard_tag,
sdt->app_tag, be32_to_cpu(sdt->ref_tag));
- rc = sbc_dif_v1_verify(dev, sdt, daddr + j, sector,
+ rc = sbc_dif_v1_verify(cmd, sdt, daddr + j, sector,
ei_lba);
if (rc) {
kunmap_atomic(paddr);
kunmap_atomic(paddr);
kunmap_atomic(daddr);
}
+ if (!sg)
+ return 0;
+
sbc_dif_copy_prot(cmd, sectors, false, sg, sg_off);
return 0;
continue;
}
- rc = sbc_dif_v1_verify(dev, sdt, daddr + j, sector,
+ rc = sbc_dif_v1_verify(cmd, sdt, daddr + j, sector,
ei_lba);
if (rc) {
kunmap_atomic(paddr);
git.samba.org / sfrench / cifs-2.6.git / blobdiff