target: move ref_cmd from the generic se_tmr_req into iscsi code

Also remove the unused ref_task_lun field in struct se_tmr_req.

(nab: Add missing TASK_REASSIGN ref_lun vs. ref_cmd orig_fe_lun checks
      in iscsit_tmr_task_reassign)

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

2 files changed, 21 insertions, 23 deletions

diff --git a/drivers/target/iscsi/iscsi_target_core.h b/drivers/target/iscsi/iscsi_target_core.h
index 1c70144cdaf1..63a8ed26f119 100644
--- a/drivers/target/iscsi/iscsi_target_core.h
+++ b/drivers/target/iscsi/iscsi_target_core.h
@@ -481,6 +481,7 @@ struct iscsi_tmr_req {
         bool                    task_reassign:1;
         u32                     ref_cmd_sn;
         u32                     exp_data_sn;
+        struct iscsi_cmd        *ref_cmd;
         struct iscsi_conn_recovery *conn_recovery;
         struct se_tmr_req       *se_tmr_req;
 };
diff --git a/drivers/target/iscsi/iscsi_target_tmr.c b/drivers/target/iscsi/iscsi_target_tmr.c
index f4e640b51fd1..1f7552986168 100644
--- a/drivers/target/iscsi/iscsi_target_tmr.c
+++ b/drivers/target/iscsi/iscsi_target_tmr.c
@@ -19,6 +19,7 @@
  ******************************************************************************/
 
 #include <asm/unaligned.h>
+#include <scsi/scsi_device.h>
 #include <scsi/iscsi_proto.h>
 #include <target/target_core_base.h>
 #include <target/target_core_fabric.h>
@@ -61,7 +62,7 @@ u8 iscsit_tmr_abort_task(
         }
 
         se_tmr->ref_task_tag            = hdr->rtt;
-        se_tmr->ref_cmd                 = &ref_cmd->se_cmd;
+        tmr_req->ref_cmd                = ref_cmd;
         tmr_req->ref_cmd_sn             = hdr->refcmdsn;
         tmr_req->exp_data_sn            = hdr->exp_datasn;
 
@@ -121,7 +122,7 @@ u8 iscsit_tmr_task_reassign(
         struct iscsi_tmr_req *tmr_req = cmd->tmr_req;
         struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req;
         struct iscsi_tm *hdr = (struct iscsi_tm *) buf;
-        int ret;
+        int ret, ref_lun;
 
         pr_debug("Got TASK_REASSIGN TMR ITT: 0x%08x,"
                 " RefTaskTag: 0x%08x, ExpDataSN: 0x%08x, CID: %hu\n",
@@ -155,9 +156,16 @@ u8 iscsit_tmr_task_reassign(
                 return ISCSI_TMF_RSP_REJECTED;
         }
 
+        ref_lun = scsilun_to_int(&hdr->lun);
+        if (ref_lun != ref_cmd->se_cmd.orig_fe_lun) {
+                pr_err("Unable to perform connection recovery for"
+                        " differing ref_lun: %d ref_cmd orig_fe_lun: %u\n",
+                        ref_lun, ref_cmd->se_cmd.orig_fe_lun);
+                return ISCSI_TMF_RSP_REJECTED;
+        }
+
         se_tmr->ref_task_tag            = hdr->rtt;
-        se_tmr->ref_cmd                 = &ref_cmd->se_cmd;
-        se_tmr->ref_task_lun            = get_unaligned_le64(&hdr->lun);
+        tmr_req->ref_cmd                = ref_cmd;
         tmr_req->ref_cmd_sn             = hdr->refcmdsn;
         tmr_req->exp_data_sn            = hdr->exp_datasn;
         tmr_req->conn_recovery          = cr;
@@ -191,9 +199,7 @@ static int iscsit_task_reassign_complete_nop_out(
         struct iscsi_tmr_req *tmr_req,
         struct iscsi_conn *conn)
 {
-        struct se_tmr_req *se_tmr = tmr_req->se_tmr_req;
-        struct se_cmd *se_cmd = se_tmr->ref_cmd;
-        struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+        struct iscsi_cmd *cmd = tmr_req->ref_cmd;
         struct iscsi_conn_recovery *cr;
 
         if (!cmd->cr) {
@@ -360,9 +366,7 @@ static int iscsit_task_reassign_complete_scsi_cmnd(
         struct iscsi_tmr_req *tmr_req,
         struct iscsi_conn *conn)
 {
-        struct se_tmr_req *se_tmr = tmr_req->se_tmr_req;
-        struct se_cmd *se_cmd = se_tmr->ref_cmd;
-        struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+        struct iscsi_cmd *cmd = tmr_req->ref_cmd;
         struct iscsi_conn_recovery *cr;
 
         if (!cmd->cr) {
@@ -385,7 +389,7 @@ static int iscsit_task_reassign_complete_scsi_cmnd(
         list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list);
         spin_unlock_bh(&conn->cmd_lock);
 
-        if (se_cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) {
+        if (cmd->se_cmd.se_cmd_flags & SCF_SENT_CHECK_CONDITION) {
                 cmd->i_state = ISTATE_SEND_STATUS;
                 iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
                 return 0;
@@ -411,17 +415,14 @@ static int iscsit_task_reassign_complete(
         struct iscsi_tmr_req *tmr_req,
         struct iscsi_conn *conn)
 {
-        struct se_tmr_req *se_tmr = tmr_req->se_tmr_req;
-        struct se_cmd *se_cmd;
         struct iscsi_cmd *cmd;
         int ret = 0;
 
-        if (!se_tmr->ref_cmd) {
+        if (!tmr_req->ref_cmd) {
                 pr_err("TMR Request is missing a RefCmd struct iscsi_cmd.\n");
                 return -1;
         }
-        se_cmd = se_tmr->ref_cmd;
-        cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+        cmd = tmr_req->ref_cmd;
 
         cmd->conn = conn;
 
@@ -547,9 +548,7 @@ int iscsit_task_reassign_prepare_write(
         struct iscsi_tmr_req *tmr_req,
         struct iscsi_conn *conn)
 {
-        struct se_tmr_req *se_tmr = tmr_req->se_tmr_req;
-        struct se_cmd *se_cmd = se_tmr->ref_cmd;
-        struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+        struct iscsi_cmd *cmd = tmr_req->ref_cmd;
         struct iscsi_pdu *pdu = NULL;
         struct iscsi_r2t *r2t = NULL, *r2t_tmp;
         int first_incomplete_r2t = 1, i = 0;
@@ -782,14 +781,12 @@ int iscsit_check_task_reassign_expdatasn(
         struct iscsi_tmr_req *tmr_req,
         struct iscsi_conn *conn)
 {
-        struct se_tmr_req *se_tmr = tmr_req->se_tmr_req;
-        struct se_cmd *se_cmd = se_tmr->ref_cmd;
-        struct iscsi_cmd *ref_cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+        struct iscsi_cmd *ref_cmd = tmr_req->ref_cmd;
 
         if (ref_cmd->iscsi_opcode != ISCSI_OP_SCSI_CMD)
                 return 0;
 
-        if (se_cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION)
+        if (ref_cmd->se_cmd.se_cmd_flags & SCF_SENT_CHECK_CONDITION)
                 return 0;
 
         if (ref_cmd->data_direction == DMA_NONE)