From def2b339b422070ecb99298a80e4b15033adc0ce Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Mon, 23 Dec 2013 20:38:30 +0000 Subject: [PATCH] target: Add protection SGLs to target_submit_cmd_map_sgls This patch adds support to target_submit_cmd_map_sgls() for accepting 'sgl_prot' + 'sgl_prot_count' parameters for DIF protection information. Note the passed parameters are stored at se_cmd->t_prot_sg and se_cmd->t_prot_nents respectively. Also, update tcm_loop and vhost-scsi fabrics usage of target_submit_cmd_map_sgls() to take into account the new parameters. Cc: Martin K. Petersen Cc: Christoph Hellwig Cc: Hannes Reinecke Cc: Sagi Grimberg Cc: Or Gerlitz Signed-off-by: Nicholas Bellinger --- drivers/target/loopback/tcm_loop.c | 2 +- drivers/target/target_core_transport.c | 16 ++++++++++++++-- drivers/vhost/scsi.c | 2 +- include/target/target_core_fabric.h | 3 ++- 4 files changed, 18 insertions(+), 5 deletions(-) diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c index 763ee450f71b..112b795a7b80 100644 --- a/drivers/target/loopback/tcm_loop.c +++ b/drivers/target/loopback/tcm_loop.c @@ -217,7 +217,7 @@ static void tcm_loop_submission_work(struct work_struct *work) scsi_bufflen(sc), tcm_loop_sam_attr(sc), sc->sc_data_direction, 0, scsi_sglist(sc), scsi_sg_count(sc), - sgl_bidi, sgl_bidi_count); + sgl_bidi, sgl_bidi_count, NULL, 0); if (rc < 0) { set_host_byte(sc, DID_NO_CONNECT); goto out_done; diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index fa4fc0429452..aebe0bb3f23b 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -1310,6 +1310,8 @@ transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *sgl, * @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 * * Returns non zero to signal active I/O shutdown failure. All other * setup exceptions will be returned as a SCSI CHECK_CONDITION response, @@ -1322,7 +1324,8 @@ int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess unsigned char *cdb, unsigned char *sense, u32 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_bidi, u32 sgl_bidi_count, + struct scatterlist *sgl_prot, u32 sgl_prot_count) { struct se_portal_group *se_tpg; sense_reason_t rc; @@ -1364,6 +1367,14 @@ int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess target_put_sess_cmd(se_sess, se_cmd); return 0; } + /* + * Save pointers for SGLs containing protection information, + * if present. + */ + if (sgl_prot_count) { + se_cmd->t_prot_sg = sgl_prot; + se_cmd->t_prot_nents = sgl_prot_count; + } rc = target_setup_cmd_from_cdb(se_cmd, cdb); if (rc != 0) { @@ -1406,6 +1417,7 @@ int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess return 0; } } + /* * Check if we need to delay processing because of ALUA * Active/NonOptimized primary access state.. @@ -1445,7 +1457,7 @@ int target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess, { 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); + flags, NULL, 0, NULL, 0, NULL, 0); } EXPORT_SYMBOL(target_submit_cmd); diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c index f175629513ed..84488a890b69 100644 --- a/drivers/vhost/scsi.c +++ b/drivers/vhost/scsi.c @@ -889,7 +889,7 @@ static void tcm_vhost_submission_work(struct work_struct *work) cmd->tvc_lun, cmd->tvc_exp_data_len, cmd->tvc_task_attr, cmd->tvc_data_direction, TARGET_SCF_ACK_KREF, sg_ptr, cmd->tvc_sgl_count, - sg_bidi_ptr, sg_no_bidi); + sg_bidi_ptr, sg_no_bidi, NULL, 0); if (rc < 0) { transport_send_check_condition_and_sense(se_cmd, TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h index 4cf4fda404a3..0218d689b3d7 100644 --- a/include/target/target_core_fabric.h +++ b/include/target/target_core_fabric.h @@ -105,7 +105,8 @@ sense_reason_t transport_lookup_cmd_lun(struct se_cmd *, u32); sense_reason_t target_setup_cmd_from_cdb(struct se_cmd *, unsigned char *); int target_submit_cmd_map_sgls(struct se_cmd *, struct se_session *, unsigned char *, unsigned char *, u32, u32, int, int, int, - struct scatterlist *, u32, struct scatterlist *, u32); + struct scatterlist *, u32, struct scatterlist *, u32, + struct scatterlist *, u32); int target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *, unsigned char *, u32, u32, int, int, int); int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,