target: split core_scsi3_emulate_pr
Split core_scsi2_emulate_crh into one routine each for the
PERSISTENT_RESERVE_IN and PERSISTENT_RESERVE_OUT side.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c
index 830953a..34403e80 100644
--- a/drivers/target/target_core_pr.c
+++ b/drivers/target/target_core_pr.c
@@ -3734,12 +3734,30 @@
/*
* See spc4r17 section 6.14 Table 170
*/
-static int core_scsi3_emulate_pr_out(struct se_cmd *cmd, unsigned char *cdb)
+int target_scsi3_emulate_pr_out(struct se_cmd *cmd)
{
+ unsigned char *cdb = &cmd->t_task_cdb[0];
unsigned char *buf;
u64 res_key, sa_res_key;
int sa, scope, type, aptpl;
int spec_i_pt = 0, all_tg_pt = 0, unreg = 0;
+
+ /*
+ * Following spc2r20 5.5.1 Reservations overview:
+ *
+ * If a logical unit has been reserved by any RESERVE command and is
+ * still reserved by any initiator, all PERSISTENT RESERVE IN and all
+ * PERSISTENT RESERVE OUT commands shall conflict regardless of
+ * initiator or service action and shall terminate with a RESERVATION
+ * CONFLICT status.
+ */
+ if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) {
+ pr_err("Received PERSISTENT_RESERVE CDB while legacy"
+ " SPC-2 reservation is held, returning"
+ " RESERVATION_CONFLICT\n");
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+
/*
* FIXME: A NULL struct se_session pointer means an this is not coming from
* a $FABRIC_MOD's nexus, but from internal passthrough ops.
@@ -4185,9 +4203,25 @@
return 0;
}
-static int core_scsi3_emulate_pr_in(struct se_cmd *cmd, unsigned char *cdb)
+int target_scsi3_emulate_pr_in(struct se_cmd *cmd)
{
- switch (cdb[1] & 0x1f) {
+ /*
+ * Following spc2r20 5.5.1 Reservations overview:
+ *
+ * If a logical unit has been reserved by any RESERVE command and is
+ * still reserved by any initiator, all PERSISTENT RESERVE IN and all
+ * PERSISTENT RESERVE OUT commands shall conflict regardless of
+ * initiator or service action and shall terminate with a RESERVATION
+ * CONFLICT status.
+ */
+ if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) {
+ pr_err("Received PERSISTENT_RESERVE CDB while legacy"
+ " SPC-2 reservation is held, returning"
+ " RESERVATION_CONFLICT\n");
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+
+ switch (cmd->t_task_cdb[1] & 0x1f) {
case PRI_READ_KEYS:
return core_scsi3_pri_read_keys(cmd);
case PRI_READ_RESERVATION:
@@ -4198,35 +4232,9 @@
return core_scsi3_pri_read_full_status(cmd);
default:
pr_err("Unknown PERSISTENT_RESERVE_IN service"
- " action: 0x%02x\n", cdb[1] & 0x1f);
+ " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f);
return PYX_TRANSPORT_INVALID_CDB_FIELD;
}
-
-}
-
-int core_scsi3_emulate_pr(struct se_cmd *cmd)
-{
- unsigned char *cdb = &cmd->t_task_cdb[0];
- struct se_device *dev = cmd->se_dev;
- /*
- * Following spc2r20 5.5.1 Reservations overview:
- *
- * If a logical unit has been reserved by any RESERVE command and is
- * still reserved by any initiator, all PERSISTENT RESERVE IN and all
- * PERSISTENT RESERVE OUT commands shall conflict regardless of
- * initiator or service action and shall terminate with a RESERVATION
- * CONFLICT status.
- */
- if (dev->dev_flags & DF_SPC2_RESERVATIONS) {
- pr_err("Received PERSISTENT_RESERVE CDB while legacy"
- " SPC-2 reservation is held, returning"
- " RESERVATION_CONFLICT\n");
- return PYX_TRANSPORT_RESERVATION_CONFLICT;
- }
-
- return (cdb[0] == PERSISTENT_RESERVE_OUT) ?
- core_scsi3_emulate_pr_out(cmd, cdb) :
- core_scsi3_emulate_pr_in(cmd, cdb);
}
static int core_pt_reservation_check(struct se_cmd *cmd, u32 *pr_res_type)
diff --git a/drivers/target/target_core_pr.h b/drivers/target/target_core_pr.h
index 4e94a42..c9acb11 100644
--- a/drivers/target/target_core_pr.h
+++ b/drivers/target/target_core_pr.h
@@ -62,7 +62,9 @@
extern unsigned char *core_scsi3_pr_dump_type(int);
extern int core_scsi3_check_cdb_abort_and_preempt(struct list_head *,
struct se_cmd *);
-extern int core_scsi3_emulate_pr(struct se_cmd *);
+
+extern int target_scsi3_emulate_pr_in(struct se_cmd *cmd);
+extern int target_scsi3_emulate_pr_out(struct se_cmd *cmd);
extern int core_setup_reservations(struct se_device *, int);
#endif /* TARGET_CORE_PR_H */
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index f423293..717f84a 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -2842,11 +2842,14 @@
cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
break;
case PERSISTENT_RESERVE_IN:
+ if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS)
+ cmd->transport_emulate_cdb = target_scsi3_emulate_pr_in;
+ size = (cdb[7] << 8) + cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
case PERSISTENT_RESERVE_OUT:
- cmd->transport_emulate_cdb =
- (su_dev->t10_pr.res_type ==
- SPC3_PERSISTENT_RESERVATIONS) ?
- core_scsi3_emulate_pr : NULL;
+ if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS)
+ cmd->transport_emulate_cdb = target_scsi3_emulate_pr_out;
size = (cdb[7] << 8) + cdb[8];
cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
break;
