From 0fa50a8b1244e7fc7363712e2c14a27db740cdcb Mon Sep 17 00:00:00 2001 From: Mike Christie Date: Sat, 27 Feb 2021 10:59:55 -0600 Subject: [PATCH] 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 Reviewed-by: Bodo Stroesser Signed-off-by: Mike Christie Signed-off-by: Martin K. Petersen --- drivers/target/target_core_transport.c | 78 ++++++-------------------- include/target/target_core_fabric.h | 6 +- 2 files changed, 19 insertions(+), 65 deletions(-) diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 000819112bc7..560daf9bb039 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -1753,58 +1753,6 @@ 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. - * - * @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 - * @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. - */ -int target_submit_cmd_map_sgls(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) -{ - 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; - - if (target_submit_prep(se_cmd, cdb, sgl, sgl_count, sgl_bidi, - sgl_bidi_count, sgl_prot, sgl_prot_count)) - return 0; - - target_submit(se_cmd); - return 0; -} -EXPORT_SYMBOL(target_submit_cmd_map_sgls); - /** * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd * @@ -1820,22 +1768,32 @@ EXPORT_SYMBOL(target_submit_cmd_map_sgls); * * 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(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) { - 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); + int 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, NULL, 0, NULL, 0, NULL, 0)) + return; + + target_submit(se_cmd); } EXPORT_SYMBOL(target_submit_cmd); diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h index 4b5f6687393a..86b0d4a7df92 100644 --- 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,