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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-12-23 20:38:30 +0000 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2014-01-18 09:58:09 +0000 |
| commit | def2b339b422070ecb99298a80e4b15033adc0ce (patch) | |
| tree | 820c7c3d2e4395ba9567e500111eb53975fe74a9 /drivers/target | |
| parent | 2ed22c9cbca61f0f696a0a1cbbb777da281bd79d (diff) | |
| download | linux-def2b339b422070ecb99298a80e4b15033adc0ce.tar.gz linux-def2b339b422070ecb99298a80e4b15033adc0ce.tar.bz2 linux-def2b339b422070ecb99298a80e4b15033adc0ce.zip | |
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>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/loopback/tcm_loop.c | 2 | ||||
| -rw-r--r-- | drivers/target/target_core_transport.c | 16 |
2 files changed, 15 insertions, 3 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); |