The backend modules don't know about ports and I_T nexuses and the pr_ops
callouts the modules will use don't support the old RESERVE/RELEASE
commands. This patch has us report we don't support those types of
commands and fail them.
Signed-off-by: Mike Christie <michael.christie@xxxxxxxxxx>
---
drivers/target/target_core_pr.c | 17 ++++++++
drivers/target/target_core_spc.c | 75 +++++++++++++++++++++++---------
2 files changed, 72 insertions(+), 20 deletions(-)
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c
index e16ef7d676af..7a3f07979a02 100644
--- a/drivers/target/target_core_pr.c
+++ b/drivers/target/target_core_pr.c
@@ -3554,6 +3554,18 @@ target_try_pr_out_pt(struct se_cmd *cmd, u8 sa, u64 res_key, u64 sa_res_key,
return TCM_UNSUPPORTED_SCSI_OPCODE;
}
+ switch (sa) {
+ case PRO_REGISTER_AND_MOVE:
+ case PRO_REPLACE_LOST_RESERVATION:
+ pr_err("SPC-3 PR: PRO_REGISTER_AND_MOVE and PRO_REPLACE_LOST_RESERVATION are not supported by PR passthrough.\n");
+ return TCM_UNSUPPORTED_SCSI_OPCODE;
+ }
+
+ if (spec_i_pt || all_tg_pt) {
+ pr_err("SPC-3 PR: SPEC_I_PT and ALL_TG_PT are not supported by PR passthrough.\n");
+ return TCM_UNSUPPORTED_SCSI_OPCODE;
+ }
+
return ops->execute_pr_out(cmd, sa, res_key, sa_res_key, type, aptpl);
}
@@ -4082,6 +4094,11 @@ static sense_reason_t target_try_pr_in_pt(struct se_cmd *cmd, u8 sa)
return TCM_UNSUPPORTED_SCSI_OPCODE;
}
+ if (sa == PRI_READ_FULL_STATUS) {
+ pr_err("SPC-3 PR: PRI_READ_FULL_STATUS is not supported by PR passthrough.\n");
+ return TCM_UNSUPPORTED_SCSI_OPCODE;
+ }
+
buf = transport_kmap_data_sg(cmd);
if (!buf)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index caf8d1325007..053bd2eea0e6 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -1672,7 +1672,41 @@ static bool tcm_is_pr_enabled(struct target_opcode_descriptor *descr,
{
struct se_device *dev = cmd->se_dev;
- return dev->dev_attrib.emulate_pr;
+ if (!dev->dev_attrib.emulate_pr)
+ return false;
+
+ if (!(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
+ return true;
+
+ switch (descr->opcode) {
+ case RESERVE:
+ case RESERVE_10:
+ case RELEASE:
+ case RELEASE_10:
+ /*
+ * The pr_ops which are used by the backend modules don't
+ * support these commands.
+ */
+ return false;
+ case PERSISTENT_RESERVE_OUT:
+ switch (descr->service_action) {
+ case PRO_REGISTER_AND_MOVE:
+ case PRO_REPLACE_LOST_RESERVATION:
+ /*
+ * The backend modules don't have access to ports and
+ * I_T nexuses so they can't handle these type of
+ * requests.
+ */
+ return false;
+ }
+ break;
+ case PERSISTENT_RESERVE_IN:
+ if (descr->service_action == PRI_READ_FULL_STATUS)
+ return false;
+ break;
+ }
+
+ return true;
}
static struct target_opcode_descriptor tcm_opcode_pri_read_caps = {
@@ -1797,22 +1831,13 @@ static struct target_opcode_descriptor tcm_opcode_pro_register_move = {
.enabled = tcm_is_pr_enabled,
};
-static bool
-tcm_is_scsi2_reservations_enabled(struct target_opcode_descriptor *descr,
- struct se_cmd *cmd)
-{
- struct se_device *dev = cmd->se_dev;
-
- return dev->dev_attrib.emulate_pr;
-}
-
static struct target_opcode_descriptor tcm_opcode_release = {
.support = SCSI_SUPPORT_FULL,
.opcode = RELEASE,
.cdb_size = 6,
.usage_bits = {RELEASE, 0x00, 0x00, 0x00,
0x00, SCSI_CONTROL_MASK},
- .enabled = tcm_is_scsi2_reservations_enabled,
+ .enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_release10 = {
@@ -1822,7 +1847,7 @@ static struct target_opcode_descriptor tcm_opcode_release10 = {
.usage_bits = {RELEASE_10, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0xff,
0xff, SCSI_CONTROL_MASK},
- .enabled = tcm_is_scsi2_reservations_enabled,
+ .enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_reserve = {
@@ -1831,7 +1856,7 @@ static struct target_opcode_descriptor tcm_opcode_reserve = {
.cdb_size = 6,
.usage_bits = {RESERVE, 0x00, 0x00, 0x00,
0x00, SCSI_CONTROL_MASK},
- .enabled = tcm_is_scsi2_reservations_enabled,
+ .enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_reserve10 = {
@@ -1841,7 +1866,7 @@ static struct target_opcode_descriptor tcm_opcode_reserve10 = {
.usage_bits = {RESERVE_10, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0xff,
0xff, SCSI_CONTROL_MASK},
- .enabled = tcm_is_scsi2_reservations_enabled,
+ .enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_request_sense = {
@@ -2246,12 +2271,22 @@ spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
struct se_device *dev = cmd->se_dev;
unsigned char *cdb = cmd->t_task_cdb;
- if (!dev->dev_attrib.emulate_pr &&
- ((cdb[0] == PERSISTENT_RESERVE_IN) ||
- (cdb[0] == PERSISTENT_RESERVE_OUT) ||
- (cdb[0] == RELEASE || cdb[0] == RELEASE_10) ||
- (cdb[0] == RESERVE || cdb[0] == RESERVE_10))) {
- return TCM_UNSUPPORTED_SCSI_OPCODE;
+ switch (cdb[0]) {
+ case RESERVE:
+ case RESERVE_10:
+ case RELEASE:
+ case RELEASE_10:
+ if (!dev->dev_attrib.emulate_pr)
+ return TCM_UNSUPPORTED_SCSI_OPCODE;
+
+ if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
+ return TCM_UNSUPPORTED_SCSI_OPCODE;
+ break;
+ case PERSISTENT_RESERVE_IN:
+ case PERSISTENT_RESERVE_OUT:
+ if (!dev->dev_attrib.emulate_pr)
+ return TCM_UNSUPPORTED_SCSI_OPCODE;
+ break;
}
switch (cdb[0]) {
--
2.25.1
--
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