scsi: target: core: Remove target_submit_cmd_map_sgls()

Convert target_submit_cmd() to do its own calls and then remove
target_submit_cmd_map_sgls() since no one uses it.

Link: https://lore.kernel.org/r/20210227170006.5077-15-michael.christie@oracle.com
Tested-by: Laurence Oberman <loberman@redhat.com>
Reviewed-by: Bodo Stroesser <bostroesser@gmail.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 0008191..560daf9 100644 (file)
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -1754,8 +1754,7 @@ void target_submit(struct se_cmd *se_cmd)
 EXPORT_SYMBOL_GPL(target_submit);
 
 /**
- * target_submit_cmd_map_sgls - lookup unpacked lun and submit uninitialized
- *                                     se_cmd + use pre-allocated SGL memory.
+ * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd
  *
  * @se_cmd: command descriptor to submit
  * @se_sess: associated se_sess for endpoint
@@ -1766,76 +1765,35 @@ EXPORT_SYMBOL_GPL(target_submit);
  * @task_attr: SAM task attribute
  * @data_dir: DMA data direction
  * @flags: flags for command submission from target_sc_flags_tables
- * @sgl: struct scatterlist memory for unidirectional mapping
- * @sgl_count: scatterlist count for unidirectional mapping
- * @sgl_bidi: struct scatterlist memory for bidirectional READ mapping
- * @sgl_bidi_count: scatterlist count for bidirectional READ mapping
- * @sgl_prot: struct scatterlist memory protection information
- * @sgl_prot_count: scatterlist count for protection information
  *
  * Task tags are supported if the caller has set @se_cmd->tag.
  *
- * Returns non zero to signal active I/O shutdown failure.  All other
- * setup exceptions will be returned as a SCSI CHECK_CONDITION response,
- * but still return zero here.
- *
  * This may only be called from process context, and also currently
  * assumes internal allocation of fabric payload buffer by target-core.
+ *
+ * It also assumes interal target core SGL memory allocation.
+ *
+ * This function must only be used by drivers that do their own
+ * sync during shutdown and does not use target_stop_session. If there
+ * is a failure this function will call into the fabric driver's
+ * queue_status with a CHECK_CONDITION.
  */
-int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess,
+void target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess,
                unsigned char *cdb, unsigned char *sense, u64 unpacked_lun,
-               u32 data_length, int task_attr, int data_dir, int flags,
-               struct scatterlist *sgl, u32 sgl_count,
-               struct scatterlist *sgl_bidi, u32 sgl_bidi_count,
-               struct scatterlist *sgl_prot, u32 sgl_prot_count)
+               u32 data_length, int task_attr, int data_dir, int flags)
 {
        int rc;
 
-       rc = target_init_cmd(se_cmd, se_sess, sense, unpacked_lun,
-                            data_length, task_attr, data_dir, flags);
-       if (rc < 0)
-               return rc;
+       rc = target_init_cmd(se_cmd, se_sess, sense, unpacked_lun, data_length,
+                            task_attr, data_dir, flags);
+       WARN(rc, "Invalid target_submit_cmd use. Driver must not use target_stop_session or call target_init_cmd directly.\n");
+       if (rc)
+               return;
 
-       if (target_submit_prep(se_cmd, cdb, sgl, sgl_count, sgl_bidi,
-                              sgl_bidi_count, sgl_prot, sgl_prot_count))
-               return 0;
+       if (target_submit_prep(se_cmd, cdb, NULL, 0, NULL, 0, NULL, 0))
+               return;
 
        target_submit(se_cmd);
-       return 0;
-}
-EXPORT_SYMBOL(target_submit_cmd_map_sgls);
-
-/**
- * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd
- *
- * @se_cmd: command descriptor to submit
- * @se_sess: associated se_sess for endpoint
- * @cdb: pointer to SCSI CDB
- * @sense: pointer to SCSI sense buffer
- * @unpacked_lun: unpacked LUN to reference for struct se_lun
- * @data_length: fabric expected data transfer length
- * @task_attr: SAM task attribute
- * @data_dir: DMA data direction
- * @flags: flags for command submission from target_sc_flags_tables
- *
- * Task tags are supported if the caller has set @se_cmd->tag.
- *
- * Returns non zero to signal active I/O shutdown failure.  All other
- * setup exceptions will be returned as a SCSI CHECK_CONDITION response,
- * but still return zero here.
- *
- * This may only be called from process context, and also currently
- * assumes internal allocation of fabric payload buffer by target-core.
- *
- * It also assumes interal target core SGL memory allocation.
- */
-int target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess,
-               unsigned char *cdb, unsigned char *sense, u64 unpacked_lun,
-               u32 data_length, int task_attr, int data_dir, int flags)
-{
-       return target_submit_cmd_map_sgls(se_cmd, se_sess, cdb, sense,
-                       unpacked_lun, data_length, task_attr, data_dir,
-                       flags, NULL, 0, NULL, 0, NULL, 0);
 }
 EXPORT_SYMBOL(target_submit_cmd);
 

diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h
index 4b5f668..86b0d4a 100644 (file)
--- a/include/target/target_core_fabric.h
+++ b/include/target/target_core_fabric.h
@@ -162,11 +162,7 @@ void       target_submit(struct se_cmd *se_cmd);
 sense_reason_t transport_lookup_cmd_lun(struct se_cmd *);
 sense_reason_t target_cmd_init_cdb(struct se_cmd *, unsigned char *);
 sense_reason_t target_cmd_parse_cdb(struct se_cmd *);
-int    target_submit_cmd_map_sgls(struct se_cmd *, struct se_session *,
-               unsigned char *, unsigned char *, u64, u32, int, int, int,
-               struct scatterlist *, u32, struct scatterlist *, u32,
-               struct scatterlist *, u32);
-int    target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *,
+void   target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *,
                unsigned char *, u64, u32, int, int, int);
 int    target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
                unsigned char *sense, u64 unpacked_lun,