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 <martin.petersen@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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@ -217,7 +217,7 @@ static void tcm_loop_submission_work(struct work_struct *work)
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scsi_bufflen(sc), tcm_loop_sam_attr(sc),
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sc->sc_data_direction, 0,
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scsi_sglist(sc), scsi_sg_count(sc),
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sgl_bidi, sgl_bidi_count);
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sgl_bidi, sgl_bidi_count, NULL, 0);
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if (rc < 0) {
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set_host_byte(sc, DID_NO_CONNECT);
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goto out_done;
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@ -1310,6 +1310,8 @@ transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *sgl,
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* @sgl_count: scatterlist count for unidirectional mapping
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* @sgl_bidi: struct scatterlist memory for bidirectional READ mapping
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* @sgl_bidi_count: scatterlist count for bidirectional READ mapping
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* @sgl_prot: struct scatterlist memory protection information
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* @sgl_prot_count: scatterlist count for protection information
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*
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* Returns non zero to signal active I/O shutdown failure. All other
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* setup exceptions will be returned as a SCSI CHECK_CONDITION response,
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@ -1322,7 +1324,8 @@ int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess
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unsigned char *cdb, unsigned char *sense, u32 unpacked_lun,
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u32 data_length, int task_attr, int data_dir, int flags,
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struct scatterlist *sgl, u32 sgl_count,
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struct scatterlist *sgl_bidi, u32 sgl_bidi_count)
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struct scatterlist *sgl_bidi, u32 sgl_bidi_count,
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struct scatterlist *sgl_prot, u32 sgl_prot_count)
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{
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struct se_portal_group *se_tpg;
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sense_reason_t rc;
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@ -1364,6 +1367,14 @@ int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess
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target_put_sess_cmd(se_sess, se_cmd);
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return 0;
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}
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/*
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* Save pointers for SGLs containing protection information,
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* if present.
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*/
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if (sgl_prot_count) {
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se_cmd->t_prot_sg = sgl_prot;
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se_cmd->t_prot_nents = sgl_prot_count;
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}
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rc = target_setup_cmd_from_cdb(se_cmd, cdb);
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if (rc != 0) {
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@ -1406,6 +1417,7 @@ int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess
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return 0;
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}
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}
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/*
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* Check if we need to delay processing because of ALUA
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* Active/NonOptimized primary access state..
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@ -1445,7 +1457,7 @@ int target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess,
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{
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return target_submit_cmd_map_sgls(se_cmd, se_sess, cdb, sense,
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unpacked_lun, data_length, task_attr, data_dir,
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flags, NULL, 0, NULL, 0);
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flags, NULL, 0, NULL, 0, NULL, 0);
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}
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EXPORT_SYMBOL(target_submit_cmd);
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@ -889,7 +889,7 @@ static void tcm_vhost_submission_work(struct work_struct *work)
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cmd->tvc_lun, cmd->tvc_exp_data_len,
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cmd->tvc_task_attr, cmd->tvc_data_direction,
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TARGET_SCF_ACK_KREF, sg_ptr, cmd->tvc_sgl_count,
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sg_bidi_ptr, sg_no_bidi);
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sg_bidi_ptr, sg_no_bidi, NULL, 0);
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if (rc < 0) {
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transport_send_check_condition_and_sense(se_cmd,
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TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
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@ -105,7 +105,8 @@ sense_reason_t transport_lookup_cmd_lun(struct se_cmd *, u32);
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sense_reason_t target_setup_cmd_from_cdb(struct se_cmd *, unsigned char *);
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int target_submit_cmd_map_sgls(struct se_cmd *, struct se_session *,
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unsigned char *, unsigned char *, u32, u32, int, int, int,
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struct scatterlist *, u32, struct scatterlist *, u32);
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struct scatterlist *, u32, struct scatterlist *, u32,
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struct scatterlist *, u32);
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int target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *,
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unsigned char *, u32, u32, int, int, int);
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int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
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