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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-10 19:52:19 +0900
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-10 19:52:19 +0900
commita188e7e93a36627fb3f0013f41857ab54f076d04 (patch)
tree7686a0e870decdab3971db709fb0edf04241c07e /drivers/vhost
parente1b28147f684af67bfac989756c27c19859d3d4e (diff)
parentcf0eb28d3ba60098865bf7dbcbfdd6b1cc483e3b (diff)
downloadlwn-a188e7e93a36627fb3f0013f41857ab54f076d04.tar.gz
lwn-a188e7e93a36627fb3f0013f41857ab54f076d04.zip
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Pull scsi target updates from Nicholas Bellinger: "Things have been calm for the most part with no new fabric drivers in flight for v3.7 (we're up to eight now !), so this update is primarily focused on addressing a few long-standing items within target-core and iscsi-target fabric code. The highlights include: - target: Simplify fabric sense data length handling (roland) - qla2xxx: Fix endianness of task management response code (roland) - target: fix truncation of mode data, support zero allocation length (paolo) - target: Properly support zero-length commands in normal processing path (paolo) - iscsi-target: Correctly set 0xffffffff field within ISCSI_OP_REJECT PDU (ronnie + nab) - iscsi-target: Add explicit set of cache_dynamic_acls=1 for TPG demo-mode (ronnie + nab) - target/file: Re-enable optional fd_buffered_io=1 operation (nab + hch) - iscsi-target: Add MaxXmitDataSegmenthLength forr target -> initiator MDRSL declaration (nab) - target: Add target_submit_cmd_map_sgls for SGL fabric memory passthrough (nab + hch) - tcm_loop: Convert I/O path to use target_submit_cmd_map_sgls (hch + nab) - tcm_vhost: Convert I/O path to use target_submit_cmd_map_sgls (nab + hch) The last series for adding a new target_submit_cmd_map_sgls() fabric caller (as requested by hch) that accepts pre-allocated SGL memory (using existing logic), along with converting tcm_loop + tcm_vhost has only been in -next for the last days, but has gotten enough review +testing and is clear enough a mechanical change that I think it's reasonable to merge for -rc1 code. Thanks again to everyone who contributed this round! Extra special thanks to Roland (PureStorage) for tracking down the qla2xxx target TMR response code endian issue, and to Paolo (Redhat) for resolving the long standing zero-length CDB issues within target-core between virtual and pSCSI backends." * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (44 commits) iscsi-target: Bump defaults for nopin_timeout + nopin_response_timeout values iscsit: proper endianess conversions iscsit: use the itt_t abstract type iscsit: add missing endianess conversion in iscsit_check_inaddr_any iscsit: remove incorrect unlock in iscsit_build_sendtargets_resp iscsit: mark various functions static target/iscsi: precedence bug in iscsit_set_dataout_sequence_values() target/usb-gadget: strlen() doesn't count the terminator target/usb-gadget: remove duplicate initialization tcm_vhost: Convert I/O path to use target_submit_cmd_map_sgls target: Add control CDB READ payload zero work-around tcm_loop: Convert I/O path to use target_submit_cmd_map_sgls target: Add target_submit_cmd_map_sgls for SGL fabric memory passthrough iscsi-target: Add explicit set of cache_dynamic_acls=1 for TPG demo-mode iscsi-target: Change iscsi_target_seq_pdu_list.c to honor MaxXmitDataSegmentLength iscsi-target: Add MaxXmitDataSegmentLength connection recovery check iscsi-target: Convert incoming PDU payload checks to MaxXmitDataSegmentLength iscsi-target: Enable MaxXmitDataSegmentLength operation in login path iscsi-target: Add base MaxXmitDataSegmentLength code target/file: Re-enable optional fd_buffered_io=1 operation ...
Diffstat (limited to 'drivers/vhost')
-rw-r--r--drivers/vhost/tcm_vhost.c81
-rw-r--r--drivers/vhost/tcm_vhost.h8
2 files changed, 22 insertions, 67 deletions
diff --git a/drivers/vhost/tcm_vhost.c b/drivers/vhost/tcm_vhost.c
index ed8e2e6c8df2..aa31692064dd 100644
--- a/drivers/vhost/tcm_vhost.c
+++ b/drivers/vhost/tcm_vhost.c
@@ -330,17 +330,6 @@ static int tcm_vhost_queue_tm_rsp(struct se_cmd *se_cmd)
return 0;
}
-static u16 tcm_vhost_set_fabric_sense_len(struct se_cmd *se_cmd,
- u32 sense_length)
-{
- return 0;
-}
-
-static u16 tcm_vhost_get_fabric_sense_len(void)
-{
- return 0;
-}
-
static void vhost_scsi_free_cmd(struct tcm_vhost_cmd *tv_cmd)
{
struct se_cmd *se_cmd = &tv_cmd->tvc_se_cmd;
@@ -426,10 +415,7 @@ static struct tcm_vhost_cmd *vhost_scsi_allocate_cmd(
{
struct tcm_vhost_cmd *tv_cmd;
struct tcm_vhost_nexus *tv_nexus;
- struct se_portal_group *se_tpg = &tv_tpg->se_tpg;
struct se_session *se_sess;
- struct se_cmd *se_cmd;
- int sam_task_attr;
tv_nexus = tv_tpg->tpg_nexus;
if (!tv_nexus) {
@@ -445,23 +431,11 @@ static struct tcm_vhost_cmd *vhost_scsi_allocate_cmd(
}
INIT_LIST_HEAD(&tv_cmd->tvc_completion_list);
tv_cmd->tvc_tag = v_req->tag;
+ tv_cmd->tvc_task_attr = v_req->task_attr;
+ tv_cmd->tvc_exp_data_len = exp_data_len;
+ tv_cmd->tvc_data_direction = data_direction;
+ tv_cmd->tvc_nexus = tv_nexus;
- se_cmd = &tv_cmd->tvc_se_cmd;
- /*
- * Locate the SAM Task Attr from virtio_scsi_cmd_req
- */
- sam_task_attr = v_req->task_attr;
- /*
- * Initialize struct se_cmd descriptor from TCM infrastructure
- */
- transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, exp_data_len,
- data_direction, sam_task_attr,
- &tv_cmd->tvc_sense_buf[0]);
-
-#if 0 /* FIXME: vhost_scsi_allocate_cmd() BIDI operation */
- if (bidi)
- se_cmd->se_cmd_flags |= SCF_BIDI;
-#endif
return tv_cmd;
}
@@ -560,37 +534,10 @@ static void tcm_vhost_submission_work(struct work_struct *work)
{
struct tcm_vhost_cmd *tv_cmd =
container_of(work, struct tcm_vhost_cmd, work);
+ struct tcm_vhost_nexus *tv_nexus;
struct se_cmd *se_cmd = &tv_cmd->tvc_se_cmd;
struct scatterlist *sg_ptr, *sg_bidi_ptr = NULL;
int rc, sg_no_bidi = 0;
- /*
- * Locate the struct se_lun pointer based on v_req->lun, and
- * attach it to struct se_cmd
- */
- rc = transport_lookup_cmd_lun(&tv_cmd->tvc_se_cmd, tv_cmd->tvc_lun);
- if (rc < 0) {
- pr_err("Failed to look up lun: %d\n", tv_cmd->tvc_lun);
- transport_send_check_condition_and_sense(&tv_cmd->tvc_se_cmd,
- tv_cmd->tvc_se_cmd.scsi_sense_reason, 0);
- transport_generic_free_cmd(se_cmd, 0);
- return;
- }
-
- rc = target_setup_cmd_from_cdb(se_cmd, tv_cmd->tvc_cdb);
- if (rc == -ENOMEM) {
- transport_send_check_condition_and_sense(se_cmd,
- TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
- transport_generic_free_cmd(se_cmd, 0);
- return;
- } else if (rc < 0) {
- if (se_cmd->se_cmd_flags & SCF_SCSI_RESERVATION_CONFLICT)
- tcm_vhost_queue_status(se_cmd);
- else
- transport_send_check_condition_and_sense(se_cmd,
- se_cmd->scsi_sense_reason, 0);
- transport_generic_free_cmd(se_cmd, 0);
- return;
- }
if (tv_cmd->tvc_sgl_count) {
sg_ptr = tv_cmd->tvc_sgl;
@@ -608,17 +555,19 @@ static void tcm_vhost_submission_work(struct work_struct *work)
} else {
sg_ptr = NULL;
}
-
- rc = transport_generic_map_mem_to_cmd(se_cmd, sg_ptr,
- tv_cmd->tvc_sgl_count, sg_bidi_ptr,
- sg_no_bidi);
+ tv_nexus = tv_cmd->tvc_nexus;
+
+ rc = target_submit_cmd_map_sgls(se_cmd, tv_nexus->tvn_se_sess,
+ tv_cmd->tvc_cdb, &tv_cmd->tvc_sense_buf[0],
+ tv_cmd->tvc_lun, tv_cmd->tvc_exp_data_len,
+ tv_cmd->tvc_task_attr, tv_cmd->tvc_data_direction,
+ 0, sg_ptr, tv_cmd->tvc_sgl_count,
+ sg_bidi_ptr, sg_no_bidi);
if (rc < 0) {
transport_send_check_condition_and_sense(se_cmd,
- se_cmd->scsi_sense_reason, 0);
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
transport_generic_free_cmd(se_cmd, 0);
- return;
}
- transport_handle_cdb_direct(se_cmd);
}
static void vhost_scsi_handle_vq(struct vhost_scsi *vs)
@@ -1531,8 +1480,6 @@ static struct target_core_fabric_ops tcm_vhost_ops = {
.queue_data_in = tcm_vhost_queue_data_in,
.queue_status = tcm_vhost_queue_status,
.queue_tm_rsp = tcm_vhost_queue_tm_rsp,
- .get_fabric_sense_len = tcm_vhost_get_fabric_sense_len,
- .set_fabric_sense_len = tcm_vhost_set_fabric_sense_len,
/*
* Setup callers for generic logic in target_core_fabric_configfs.c
*/
diff --git a/drivers/vhost/tcm_vhost.h b/drivers/vhost/tcm_vhost.h
index d9e93557d669..7e87c63ecbcd 100644
--- a/drivers/vhost/tcm_vhost.h
+++ b/drivers/vhost/tcm_vhost.h
@@ -5,6 +5,12 @@
struct tcm_vhost_cmd {
/* Descriptor from vhost_get_vq_desc() for virt_queue segment */
int tvc_vq_desc;
+ /* virtio-scsi initiator task attribute */
+ int tvc_task_attr;
+ /* virtio-scsi initiator data direction */
+ enum dma_data_direction tvc_data_direction;
+ /* Expected data transfer length from virtio-scsi header */
+ u32 tvc_exp_data_len;
/* The Tag from include/linux/virtio_scsi.h:struct virtio_scsi_cmd_req */
u64 tvc_tag;
/* The number of scatterlists associated with this cmd */
@@ -17,6 +23,8 @@ struct tcm_vhost_cmd {
struct virtio_scsi_cmd_resp __user *tvc_resp;
/* Pointer to vhost_scsi for our device */
struct vhost_scsi *tvc_vhost;
+ /* Pointer to vhost nexus memory */
+ struct tcm_vhost_nexus *tvc_nexus;
/* The TCM I/O descriptor that is accessed via container_of() */
struct se_cmd tvc_se_cmd;
/* work item used for cmwq dispatch to tcm_vhost_submission_work() */