summaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2014-12-19 18:02:22 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-12-19 18:02:22 -0800
commited55635e2e4df3169f21ae4047004b7235de956e (patch)
tree59483776aa04d2b87023059f8a84c5c08d15373f /drivers
parent5be95b7e24bde4d93ff1bff5911b303043753168 (diff)
parentae450e246e8540300699480a3780a420a028b73f (diff)
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Pull SCSI target fixes from Nicholas Bellinger: "The highlights this merge window include: - Allow target fabric drivers to function as built-in. (Roland) - Fix tcm_loop multi-TPG endpoint nexus bug. (Hannes) - Move per device config_item_type into se_subsystem_api, allowing configfs attributes to be defined at module_init time. (Jerome + nab) - Convert existing IBLOCK/FILEIO/RAMDISK/PSCSI/TCMU drivers to use external configfs attributes. (nab) - A number of iser-target fixes related to active session + network portal shutdown stability during extended stress testing. (Sagi + Slava) - Dynamic allocation of T10-PI contexts for iser-target, fixing a potentially bogus iscsi_np->tpg_np pointer reference in >= v3.14 code. (Sagi) - iser-target performance + scalability improvements. (Sagi) - Fixes for SPC-4 Persistent Reservation AllRegistrants spec compliance. (Ilias + James + nab) - Avoid potential short kern_sendmsg() in iscsi-target for now until Al's conversion to use msghdr iteration is merged post -rc1. (Viro) Also, Sagi has requested a number of iser-target patches (9) that address stability issues he's encountered during extended stress testing be considered for v3.10.y + v3.14.y code. Given the amount of LOC involved, it will certainly require extra backporting effort. Apologies in advance to Greg-KH & Co on this. Sagi and I will be working post-merge to ensure they each get applied correctly" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (53 commits) target: Allow AllRegistrants to re-RESERVE existing reservation uapi/linux/target_core_user.h: fix headers_install.sh badness iscsi-target: Fail connection on short sendmsg writes iscsi-target: nullify session in failed login sequence target: Avoid dropping AllRegistrants reservation during unregister target: Fix R_HOLDER bit usage for AllRegistrants iscsi-target: Drop left-over bogus iscsi_np->tpg_np iser-target: Fix wc->wr_id cast warning iser-target: Remove code duplication iser-target: Adjust log levels and prettify some prints iser-target: Use debug_level parameter to control logging level iser-target: Fix logout sequence iser-target: Don't wait for session commands from completion context iser-target: Reduce CQ lock contention by batch polling iser-target: Introduce isert_poll_budget iser-target: Remove an atomic operation from the IO path iser-target: Remove redundant call to isert_conn_terminate iser-target: Use single CQ for TX and RX iser-target: Centralize completion elements to a context iser-target: Cast wr_id with uintptr_t instead of unsinged long ...
Diffstat (limited to 'drivers')
-rw-r--r--drivers/infiniband/ulp/isert/ib_isert.c1599
-rw-r--r--drivers/infiniband/ulp/isert/ib_isert.h80
-rw-r--r--drivers/target/iscsi/iscsi_target.c1
-rw-r--r--drivers/target/iscsi/iscsi_target_core.h1
-rw-r--r--drivers/target/iscsi/iscsi_target_login.c11
-rw-r--r--drivers/target/iscsi/iscsi_target_tpg.c1
-rw-r--r--drivers/target/iscsi/iscsi_target_transport.c3
-rw-r--r--drivers/target/iscsi/iscsi_target_util.c26
-rw-r--r--drivers/target/loopback/tcm_loop.c66
-rw-r--r--drivers/target/loopback/tcm_loop.h7
-rw-r--r--drivers/target/target_core_configfs.c344
-rw-r--r--drivers/target/target_core_device.c90
-rw-r--r--drivers/target/target_core_file.c42
-rw-r--r--drivers/target/target_core_hba.c7
-rw-r--r--drivers/target/target_core_iblock.c42
-rw-r--r--drivers/target/target_core_internal.h28
-rw-r--r--drivers/target/target_core_pr.c125
-rw-r--r--drivers/target/target_core_pscsi.c26
-rw-r--r--drivers/target/target_core_rd.c41
-rw-r--r--drivers/target/target_core_user.c42
20 files changed, 1348 insertions, 1234 deletions
diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c
index 10641b7816f4..dafb3c531f96 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -22,7 +22,6 @@
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/in6.h>
-#include <linux/llist.h>
#include <rdma/ib_verbs.h>
#include <rdma/rdma_cm.h>
#include <target/target_core_base.h>
@@ -36,11 +35,17 @@
#define ISERT_MAX_CONN 8
#define ISER_MAX_RX_CQ_LEN (ISERT_QP_MAX_RECV_DTOS * ISERT_MAX_CONN)
#define ISER_MAX_TX_CQ_LEN (ISERT_QP_MAX_REQ_DTOS * ISERT_MAX_CONN)
+#define ISER_MAX_CQ_LEN (ISER_MAX_RX_CQ_LEN + ISER_MAX_TX_CQ_LEN + \
+ ISERT_MAX_CONN)
+
+int isert_debug_level = 0;
+module_param_named(debug_level, isert_debug_level, int, 0644);
+MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:0)");
static DEFINE_MUTEX(device_list_mutex);
static LIST_HEAD(device_list);
-static struct workqueue_struct *isert_rx_wq;
static struct workqueue_struct *isert_comp_wq;
+static struct workqueue_struct *isert_release_wq;
static void
isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn);
@@ -54,19 +59,32 @@ isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
struct isert_rdma_wr *wr);
static int
isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd);
+static int
+isert_rdma_post_recvl(struct isert_conn *isert_conn);
+static int
+isert_rdma_accept(struct isert_conn *isert_conn);
+struct rdma_cm_id *isert_setup_id(struct isert_np *isert_np);
+
+static inline bool
+isert_prot_cmd(struct isert_conn *conn, struct se_cmd *cmd)
+{
+ return (conn->pi_support &&
+ cmd->prot_op != TARGET_PROT_NORMAL);
+}
+
static void
isert_qp_event_callback(struct ib_event *e, void *context)
{
struct isert_conn *isert_conn = (struct isert_conn *)context;
- pr_err("isert_qp_event_callback event: %d\n", e->event);
+ isert_err("conn %p event: %d\n", isert_conn, e->event);
switch (e->event) {
case IB_EVENT_COMM_EST:
rdma_notify(isert_conn->conn_cm_id, IB_EVENT_COMM_EST);
break;
case IB_EVENT_QP_LAST_WQE_REACHED:
- pr_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED:\n");
+ isert_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED\n");
break;
default:
break;
@@ -80,39 +98,41 @@ isert_query_device(struct ib_device *ib_dev, struct ib_device_attr *devattr)
ret = ib_query_device(ib_dev, devattr);
if (ret) {
- pr_err("ib_query_device() failed: %d\n", ret);
+ isert_err("ib_query_device() failed: %d\n", ret);
return ret;
}
- pr_debug("devattr->max_sge: %d\n", devattr->max_sge);
- pr_debug("devattr->max_sge_rd: %d\n", devattr->max_sge_rd);
+ isert_dbg("devattr->max_sge: %d\n", devattr->max_sge);
+ isert_dbg("devattr->max_sge_rd: %d\n", devattr->max_sge_rd);
return 0;
}
static int
-isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id,
- u8 protection)
+isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id)
{
struct isert_device *device = isert_conn->conn_device;
struct ib_qp_init_attr attr;
- int ret, index, min_index = 0;
+ struct isert_comp *comp;
+ int ret, i, min = 0;
mutex_lock(&device_list_mutex);
- for (index = 0; index < device->cqs_used; index++)
- if (device->cq_active_qps[index] <
- device->cq_active_qps[min_index])
- min_index = index;
- device->cq_active_qps[min_index]++;
- pr_debug("isert_conn_setup_qp: Using min_index: %d\n", min_index);
+ for (i = 0; i < device->comps_used; i++)
+ if (device->comps[i].active_qps <
+ device->comps[min].active_qps)
+ min = i;
+ comp = &device->comps[min];
+ comp->active_qps++;
+ isert_info("conn %p, using comp %p min_index: %d\n",
+ isert_conn, comp, min);
mutex_unlock(&device_list_mutex);
memset(&attr, 0, sizeof(struct ib_qp_init_attr));
attr.event_handler = isert_qp_event_callback;
attr.qp_context = isert_conn;
- attr.send_cq = device->dev_tx_cq[min_index];
- attr.recv_cq = device->dev_rx_cq[min_index];
+ attr.send_cq = comp->cq;
+ attr.recv_cq = comp->cq;
attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS;
- attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS;
+ attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS + 1;
/*
* FIXME: Use devattr.max_sge - 2 for max_send_sge as
* work-around for RDMA_READs with ConnectX-2.
@@ -126,29 +146,29 @@ isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id,
attr.cap.max_recv_sge = 1;
attr.sq_sig_type = IB_SIGNAL_REQ_WR;
attr.qp_type = IB_QPT_RC;
- if (protection)
+ if (device->pi_capable)
attr.create_flags |= IB_QP_CREATE_SIGNATURE_EN;
- pr_debug("isert_conn_setup_qp cma_id->device: %p\n",
- cma_id->device);
- pr_debug("isert_conn_setup_qp conn_pd->device: %p\n",
- isert_conn->conn_pd->device);
-
ret = rdma_create_qp(cma_id, isert_conn->conn_pd, &attr);
if (ret) {
- pr_err("rdma_create_qp failed for cma_id %d\n", ret);
- return ret;
+ isert_err("rdma_create_qp failed for cma_id %d\n", ret);
+ goto err;
}
isert_conn->conn_qp = cma_id->qp;
- pr_debug("rdma_create_qp() returned success >>>>>>>>>>>>>>>>>>>>>>>>>.\n");
return 0;
+err:
+ mutex_lock(&device_list_mutex);
+ comp->active_qps--;
+ mutex_unlock(&device_list_mutex);
+
+ return ret;
}
static void
isert_cq_event_callback(struct ib_event *e, void *context)
{
- pr_debug("isert_cq_event_callback event: %d\n", e->event);
+ isert_dbg("event: %d\n", e->event);
}
static int
@@ -182,6 +202,7 @@ isert_alloc_rx_descriptors(struct isert_conn *isert_conn)
}
isert_conn->conn_rx_desc_head = 0;
+
return 0;
dma_map_fail:
@@ -193,6 +214,8 @@ dma_map_fail:
kfree(isert_conn->conn_rx_descs);
isert_conn->conn_rx_descs = NULL;
fail:
+ isert_err("conn %p failed to allocate rx descriptors\n", isert_conn);
+
return -ENOMEM;
}
@@ -216,27 +239,23 @@ isert_free_rx_descriptors(struct isert_conn *isert_conn)
isert_conn->conn_rx_descs = NULL;
}
-static void isert_cq_tx_work(struct work_struct *);
-static void isert_cq_tx_callback(struct ib_cq *, void *);
-static void isert_cq_rx_work(struct work_struct *);
-static void isert_cq_rx_callback(struct ib_cq *, void *);
+static void isert_cq_work(struct work_struct *);
+static void isert_cq_callback(struct ib_cq *, void *);
static int
isert_create_device_ib_res(struct isert_device *device)
{
struct ib_device *ib_dev = device->ib_device;
- struct isert_cq_desc *cq_desc;
struct ib_device_attr *dev_attr;
- int ret = 0, i, j;
- int max_rx_cqe, max_tx_cqe;
+ int ret = 0, i;
+ int max_cqe;
dev_attr = &device->dev_attr;
ret = isert_query_device(ib_dev, dev_attr);
if (ret)
return ret;
- max_rx_cqe = min(ISER_MAX_RX_CQ_LEN, dev_attr->max_cqe);
- max_tx_cqe = min(ISER_MAX_TX_CQ_LEN, dev_attr->max_cqe);
+ max_cqe = min(ISER_MAX_CQ_LEN, dev_attr->max_cqe);
/* asign function handlers */
if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS &&
@@ -254,55 +273,38 @@ isert_create_device_ib_res(struct isert_device *device)
device->pi_capable = dev_attr->device_cap_flags &
IB_DEVICE_SIGNATURE_HANDOVER ? true : false;
- device->cqs_used = min_t(int, num_online_cpus(),
- device->ib_device->num_comp_vectors);
- device->cqs_used = min(ISERT_MAX_CQ, device->cqs_used);
- pr_debug("Using %d CQs, device %s supports %d vectors support "
- "Fast registration %d pi_capable %d\n",
- device->cqs_used, device->ib_device->name,
- device->ib_device->num_comp_vectors, device->use_fastreg,
- device->pi_capable);
- device->cq_desc = kzalloc(sizeof(struct isert_cq_desc) *
- device->cqs_used, GFP_KERNEL);
- if (!device->cq_desc) {
- pr_err("Unable to allocate device->cq_desc\n");
+ device->comps_used = min(ISERT_MAX_CQ, min_t(int, num_online_cpus(),
+ device->ib_device->num_comp_vectors));
+ isert_info("Using %d CQs, %s supports %d vectors support "
+ "Fast registration %d pi_capable %d\n",
+ device->comps_used, device->ib_device->name,
+ device->ib_device->num_comp_vectors, device->use_fastreg,
+ device->pi_capable);
+
+ device->comps = kcalloc(device->comps_used, sizeof(struct isert_comp),
+ GFP_KERNEL);
+ if (!device->comps) {
+ isert_err("Unable to allocate completion contexts\n");
return -ENOMEM;
}
- cq_desc = device->cq_desc;
-
- for (i = 0; i < device->cqs_used; i++) {
- cq_desc[i].device = device;
- cq_desc[i].cq_index = i;
-
- INIT_WORK(&cq_desc[i].cq_rx_work, isert_cq_rx_work);
- device->dev_rx_cq[i] = ib_create_cq(device->ib_device,
- isert_cq_rx_callback,
- isert_cq_event_callback,
- (void *)&cq_desc[i],
- max_rx_cqe, i);
- if (IS_ERR(device->dev_rx_cq[i])) {
- ret = PTR_ERR(device->dev_rx_cq[i]);
- device->dev_rx_cq[i] = NULL;
- goto out_cq;
- }
- INIT_WORK(&cq_desc[i].cq_tx_work, isert_cq_tx_work);
- device->dev_tx_cq[i] = ib_create_cq(device->ib_device,
- isert_cq_tx_callback,
- isert_cq_event_callback,
- (void *)&cq_desc[i],
- max_tx_cqe, i);
- if (IS_ERR(device->dev_tx_cq[i])) {
- ret = PTR_ERR(device->dev_tx_cq[i]);
- device->dev_tx_cq[i] = NULL;
- goto out_cq;
- }
+ for (i = 0; i < device->comps_used; i++) {
+ struct isert_comp *comp = &device->comps[i];
- ret = ib_req_notify_cq(device->dev_rx_cq[i], IB_CQ_NEXT_COMP);
- if (ret)
+ comp->device = device;
+ INIT_WORK(&comp->work, isert_cq_work);
+ comp->cq = ib_create_cq(device->ib_device,
+ isert_cq_callback,
+ isert_cq_event_callback,
+ (void *)comp,
+ max_cqe, i);
+ if (IS_ERR(comp->cq)) {
+ ret = PTR_ERR(comp->cq);
+ comp->cq = NULL;
goto out_cq;
+ }
- ret = ib_req_notify_cq(device->dev_tx_cq[i], IB_CQ_NEXT_COMP);
+ ret = ib_req_notify_cq(comp->cq, IB_CQ_NEXT_COMP);
if (ret)
goto out_cq;
}
@@ -310,19 +312,15 @@ isert_create_device_ib_res(struct isert_device *device)
return 0;
out_cq:
- for (j = 0; j < i; j++) {
- cq_desc = &device->cq_desc[j];
+ for (i = 0; i < device->comps_used; i++) {
+ struct isert_comp *comp = &device->comps[i];
- if (device->dev_rx_cq[j]) {
- cancel_work_sync(&cq_desc->cq_rx_work);
- ib_destroy_cq(device->dev_rx_cq[j]);
- }
- if (device->dev_tx_cq[j]) {
- cancel_work_sync(&cq_desc->cq_tx_work);
- ib_destroy_cq(device->dev_tx_cq[j]);
+ if (comp->cq) {
+ cancel_work_sync(&comp->work);
+ ib_destroy_cq(comp->cq);
}
}
- kfree(device->cq_desc);
+ kfree(device->comps);
return ret;
}
@@ -330,21 +328,18 @@ out_cq:
static void
isert_free_device_ib_res(struct isert_device *device)
{
- struct isert_cq_desc *cq_desc;
int i;
- for (i = 0; i < device->cqs_used; i++) {
- cq_desc = &device->cq_desc[i];
+ isert_info("device %p\n", device);
- cancel_work_sync(&cq_desc->cq_rx_work);
- cancel_work_sync(&cq_desc->cq_tx_work);
- ib_destroy_cq(device->dev_rx_cq[i]);
- ib_destroy_cq(device->dev_tx_cq[i]);
- device->dev_rx_cq[i] = NULL;
- device->dev_tx_cq[i] = NULL;
- }
+ for (i = 0; i < device->comps_used; i++) {
+ struct isert_comp *comp = &device->comps[i];
- kfree(device->cq_desc);
+ cancel_work_sync(&comp->work);
+ ib_destroy_cq(comp->cq);
+ comp->cq = NULL;
+ }
+ kfree(device->comps);
}
static void
@@ -352,6 +347,7 @@ isert_device_try_release(struct isert_device *device)
{
mutex_lock(&device_list_mutex);
device->refcount--;
+ isert_info("device %p refcount %d\n", device, device->refcount);
if (!device->refcount) {
isert_free_device_ib_res(device);
list_del(&device->dev_node);
@@ -370,6 +366,8 @@ isert_device_find_by_ib_dev(struct rdma_cm_id *cma_id)
list_for_each_entry(device, &device_list, dev_node) {
if (device->ib_device->node_guid == cma_id->device->node_guid) {
device->refcount++;
+ isert_info("Found iser device %p refcount %d\n",
+ device, device->refcount);
mutex_unlock(&device_list_mutex);
return device;
}
@@ -393,6 +391,8 @@ isert_device_find_by_ib_dev(struct rdma_cm_id *cma_id)
device->refcount++;
list_add_tail(&device->dev_node, &device_list);
+ isert_info("Created a new iser device %p refcount %d\n",
+ device, device->refcount);
mutex_unlock(&device_list_mutex);
return device;
@@ -407,7 +407,7 @@ isert_conn_free_fastreg_pool(struct isert_conn *isert_conn)
if (list_empty(&isert_conn->conn_fr_pool))
return;
- pr_debug("Freeing conn %p fastreg pool", isert_conn);
+ isert_info("Freeing conn %p fastreg pool", isert_conn);
list_for_each_entry_safe(fr_desc, tmp,
&isert_conn->conn_fr_pool, list) {
@@ -425,87 +425,97 @@ isert_conn_free_fastreg_pool(struct isert_conn *isert_conn)
}
if (i < isert_conn->conn_fr_pool_size)
- pr_warn("Pool still has %d regions registered\n",
+ isert_warn("Pool still has %d regions registered\n",
isert_conn->conn_fr_pool_size - i);
}
static int
+isert_create_pi_ctx(struct fast_reg_descriptor *desc,
+ struct ib_device *device,
+ struct ib_pd *pd)
+{
+ struct ib_mr_init_attr mr_init_attr;
+ struct pi_context *pi_ctx;
+ int ret;
+
+ pi_ctx = kzalloc(sizeof(*desc->pi_ctx), GFP_KERNEL);
+ if (!pi_ctx) {
+ isert_err("Failed to allocate pi context\n");
+ return -ENOMEM;
+ }
+
+ pi_ctx->prot_frpl = ib_alloc_fast_reg_page_list(device,
+ ISCSI_ISER_SG_TABLESIZE);
+ if (IS_ERR(pi_ctx->prot_frpl)) {
+ isert_err("Failed to allocate prot frpl err=%ld\n",
+ PTR_ERR(pi_ctx->prot_frpl));
+ ret = PTR_ERR(pi_ctx->prot_frpl);
+ goto err_pi_ctx;
+ }
+
+ pi_ctx->prot_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE);
+ if (IS_ERR(pi_ctx->prot_mr)) {
+ isert_err("Failed to allocate prot frmr err=%ld\n",
+ PTR_ERR(pi_ctx->prot_mr));
+ ret = PTR_ERR(pi_ctx->prot_mr);
+ goto err_prot_frpl;
+ }
+ desc->ind |= ISERT_PROT_KEY_VALID;
+
+ memset(&mr_init_attr, 0, sizeof(mr_init_attr));
+ mr_init_attr.max_reg_descriptors = 2;
+ mr_init_attr.flags |= IB_MR_SIGNATURE_EN;
+ pi_ctx->sig_mr = ib_create_mr(pd, &mr_init_attr);
+ if (IS_ERR(pi_ctx->sig_mr)) {
+ isert_err("Failed to allocate signature enabled mr err=%ld\n",
+ PTR_ERR(pi_ctx->sig_mr));
+ ret = PTR_ERR(pi_ctx->sig_mr);
+ goto err_prot_mr;
+ }
+
+ desc->pi_ctx = pi_ctx;
+ desc->ind |= ISERT_SIG_KEY_VALID;
+ desc->ind &= ~ISERT_PROTECTED;
+
+ return 0;
+
+err_prot_mr:
+ ib_dereg_mr(desc->pi_ctx->prot_mr);
+err_prot_frpl:
+ ib_free_fast_reg_page_list(desc->pi_ctx->prot_frpl);
+err_pi_ctx:
+ kfree(desc->pi_ctx);
+
+ return ret;
+}
+
+static int
isert_create_fr_desc(struct ib_device *ib_device, struct ib_pd *pd,
- struct fast_reg_descriptor *fr_desc, u8 protection)
+ struct fast_reg_descriptor *fr_desc)
{
int ret;
fr_desc->data_frpl = ib_alloc_fast_reg_page_list(ib_device,
ISCSI_ISER_SG_TABLESIZE);
if (IS_ERR(fr_desc->data_frpl)) {
- pr_err("Failed to allocate data frpl err=%ld\n",
- PTR_ERR(fr_desc->data_frpl));
+ isert_err("Failed to allocate data frpl err=%ld\n",
+ PTR_ERR(fr_desc->data_frpl));
return PTR_ERR(fr_desc->data_frpl);
}
fr_desc->data_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE);
if (IS_ERR(fr_desc->data_mr)) {
- pr_err("Failed to allocate data frmr err=%ld\n",
- PTR_ERR(fr_desc->data_mr));
+ isert_err("Failed to allocate data frmr err=%ld\n",
+ PTR_ERR(fr_desc->data_mr));
ret = PTR_ERR(fr_desc->data_mr);
goto err_data_frpl;
}
- pr_debug("Create fr_desc %p page_list %p\n",
- fr_desc, fr_desc->data_frpl->page_list);
fr_desc->ind |= ISERT_DATA_KEY_VALID;
- if (protection) {
- struct ib_mr_init_attr mr_init_attr = {0};
- struct pi_context *pi_ctx;
-
- fr_desc->pi_ctx = kzalloc(sizeof(*fr_desc->pi_ctx), GFP_KERNEL);
- if (!fr_desc->pi_ctx) {
- pr_err("Failed to allocate pi context\n");
- ret = -ENOMEM;
- goto err_data_mr;
- }
- pi_ctx = fr_desc->pi_ctx;
-
- pi_ctx->prot_frpl = ib_alloc_fast_reg_page_list(ib_device,
- ISCSI_ISER_SG_TABLESIZE);
- if (IS_ERR(pi_ctx->prot_frpl)) {
- pr_err("Failed to allocate prot frpl err=%ld\n",
- PTR_ERR(pi_ctx->prot_frpl));
- ret = PTR_ERR(pi_ctx->prot_frpl);
- goto err_pi_ctx;
- }
-
- pi_ctx->prot_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE);
- if (IS_ERR(pi_ctx->prot_mr)) {
- pr_err("Failed to allocate prot frmr err=%ld\n",
- PTR_ERR(pi_ctx->prot_mr));
- ret = PTR_ERR(pi_ctx->prot_mr);
- goto err_prot_frpl;
- }
- fr_desc->ind |= ISERT_PROT_KEY_VALID;
-
- mr_init_attr.max_reg_descriptors = 2;
- mr_init_attr.flags |= IB_MR_SIGNATURE_EN;
- pi_ctx->sig_mr = ib_create_mr(pd, &mr_init_attr);
- if (IS_ERR(pi_ctx->sig_mr)) {
- pr_err("Failed to allocate signature enabled mr err=%ld\n",
- PTR_ERR(pi_ctx->sig_mr));
- ret = PTR_ERR(pi_ctx->sig_mr);
- goto err_prot_mr;
- }
- fr_desc->ind |= ISERT_SIG_KEY_VALID;
- }
- fr_desc->ind &= ~ISERT_PROTECTED;
+ isert_dbg("Created fr_desc %p\n", fr_desc);
return 0;
-err_prot_mr:
- ib_dereg_mr(fr_desc->pi_ctx->prot_mr);
-err_prot_frpl:
- ib_free_fast_reg_page_list(fr_desc->pi_ctx->prot_frpl);
-err_pi_ctx:
- kfree(fr_desc->pi_ctx);
-err_data_mr:
- ib_dereg_mr(fr_desc->data_mr);
+
err_data_frpl:
ib_free_fast_reg_page_list(fr_desc->data_frpl);
@@ -513,7 +523,7 @@ err_data_frpl:
}
static int
-isert_conn_create_fastreg_pool(struct isert_conn *isert_conn, u8 pi_support)
+isert_conn_create_fastreg_pool(struct isert_conn *isert_conn)
{
struct fast_reg_descriptor *fr_desc;
struct isert_device *device = isert_conn->conn_device;
@@ -531,16 +541,15 @@ isert_conn_create_fastreg_pool(struct isert_conn *isert_conn, u8 pi_support)
for (i = 0; i < tag_num; i++) {
fr_desc = kzalloc(sizeof(*fr_desc), GFP_KERNEL);
if (!fr_desc) {
- pr_err("Failed to allocate fast_reg descriptor\n");
+ isert_err("Failed to allocate fast_reg descriptor\n");
ret = -ENOMEM;
goto err;
}
ret = isert_create_fr_desc(device->ib_device,
- isert_conn->conn_pd, fr_desc,
- pi_support);
+ isert_conn->conn_pd, fr_desc);
if (ret) {
- pr_err("Failed to create fastreg descriptor err=%d\n",
+ isert_err("Failed to create fastreg descriptor err=%d\n",
ret);
kfree(fr_desc);
goto err;
@@ -550,7 +559,7 @@ isert_conn_create_fastreg_pool(struct isert_conn *isert_conn, u8 pi_support)
isert_conn->conn_fr_pool_size++;
}
- pr_debug("Creating conn %p fastreg pool size=%d",
+ isert_dbg("Creating conn %p fastreg pool size=%d",
isert_conn, isert_conn->conn_fr_pool_size);
return 0;
@@ -563,47 +572,45 @@ err:
static int
isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
{
- struct iscsi_np *np = cma_id->context;
- struct isert_np *isert_np = np->np_context;
+ struct isert_np *isert_np = cma_id->context;
+ struct iscsi_np *np = isert_np->np;
struct isert_conn *isert_conn;
struct isert_device *device;
struct ib_device *ib_dev = cma_id->device;
int ret = 0;
- u8 pi_support;
spin_lock_bh(&np->np_thread_lock);
if (!np->enabled) {
spin_unlock_bh(&np->np_thread_lock);
- pr_debug("iscsi_np is not enabled, reject connect request\n");
+ isert_dbg("iscsi_np is not enabled, reject connect request\n");
return rdma_reject(cma_id, NULL, 0);
}
spin_unlock_bh(&np->np_thread_lock);
- pr_debug("Entering isert_connect_request cma_id: %p, context: %p\n",
+ isert_dbg("cma_id: %p, portal: %p\n",
cma_id, cma_id->context);
isert_conn = kzalloc(sizeof(struct isert_conn), GFP_KERNEL);
if (!isert_conn) {
- pr_err("Unable to allocate isert_conn\n");
+ isert_err("Unable to allocate isert_conn\n");
return -ENOMEM;
}
isert_conn->state = ISER_CONN_INIT;
INIT_LIST_HEAD(&isert_conn->conn_accept_node);
init_completion(&isert_conn->conn_login_comp);
+ init_completion(&isert_conn->login_req_comp);
init_completion(&isert_conn->conn_wait);
- init_completion(&isert_conn->conn_wait_comp_err);
kref_init(&isert_conn->conn_kref);
mutex_init(&isert_conn->conn_mutex);
spin_lock_init(&isert_conn->conn_lock);
INIT_LIST_HEAD(&isert_conn->conn_fr_pool);
- cma_id->context = isert_conn;
isert_conn->conn_cm_id = cma_id;
isert_conn->login_buf = kzalloc(ISCSI_DEF_MAX_RECV_SEG_LEN +
ISER_RX_LOGIN_SIZE, GFP_KERNEL);
if (!isert_conn->login_buf) {
- pr_err("Unable to allocate isert_conn->login_buf\n");
+ isert_err("Unable to allocate isert_conn->login_buf\n");
ret = -ENOMEM;
goto out;
}
@@ -611,7 +618,7 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
isert_conn->login_req_buf = isert_conn->login_buf;
isert_conn->login_rsp_buf = isert_conn->login_buf +
ISCSI_DEF_MAX_RECV_SEG_LEN;
- pr_debug("Set login_buf: %p login_req_buf: %p login_rsp_buf: %p\n",
+ isert_dbg("Set login_buf: %p login_req_buf: %p login_rsp_buf: %p\n",
isert_conn->login_buf, isert_conn->login_req_buf,
isert_conn->login_rsp_buf);
@@ -621,7 +628,7 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma);
if (ret) {
- pr_err("ib_dma_mapping_error failed for login_req_dma: %d\n",
+ isert_err("ib_dma_mapping_error failed for login_req_dma: %d\n",
ret);
isert_conn->login_req_dma = 0;
goto out_login_buf;
@@ -633,7 +640,7 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma);
if (ret) {
- pr_err("ib_dma_mapping_error failed for login_rsp_dma: %d\n",
+ isert_err("ib_dma_mapping_error failed for login_rsp_dma: %d\n",
ret);
isert_conn->login_rsp_dma = 0;
goto out_req_dma_map;
@@ -649,13 +656,13 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
isert_conn->initiator_depth = min_t(u8,
event->param.conn.initiator_depth,
device->dev_attr.max_qp_init_rd_atom);
- pr_debug("Using initiator_depth: %u\n", isert_conn->initiator_depth);
+ isert_dbg("Using initiator_depth: %u\n", isert_conn->initiator_depth);
isert_conn->conn_device = device;
isert_conn->conn_pd = ib_alloc_pd(isert_conn->conn_device->ib_device);
if (IS_ERR(isert_conn->conn_pd)) {
ret = PTR_ERR(isert_conn->conn_pd);
- pr_err("ib_alloc_pd failed for conn %p: ret=%d\n",
+ isert_err("ib_alloc_pd failed for conn %p: ret=%d\n",
isert_conn, ret);
goto out_pd;
}
@@ -664,20 +671,20 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
IB_ACCESS_LOCAL_WRITE);
if (IS_ERR(isert_conn->conn_mr)) {
ret = PTR_ERR(isert_conn->conn_mr);
- pr_err("ib_get_dma_mr failed for conn %p: ret=%d\n",
+ isert_err("ib_get_dma_mr failed for conn %p: ret=%d\n",
isert_conn, ret);
goto out_mr;
}
- pi_support = np->tpg_np->tpg->tpg_attrib.t10_pi;
- if (pi_support && !device->pi_capable) {
- pr_err("Protection information requested but not supported, "
- "rejecting connect request\n");
- ret = rdma_reject(cma_id, NULL, 0);
- goto out_mr;
- }
+ ret = isert_conn_setup_qp(isert_conn, cma_id);
+ if (ret)
+ goto out_conn_dev;
- ret = isert_conn_setup_qp(isert_conn, cma_id, pi_support);
+ ret = isert_rdma_post_recvl(isert_conn);
+ if (ret)
+ goto out_conn_dev;
+
+ ret = isert_rdma_accept(isert_conn);
if (ret)
goto out_conn_dev;
@@ -685,7 +692,7 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
list_add_tail(&isert_conn->conn_accept_node, &isert_np->np_accept_list);
mutex_unlock(&isert_np->np_accept_mutex);
- pr_debug("isert_connect_request() up np_sem np: %p\n", np);
+ isert_info("np %p: Allow accept_np to continue\n", np);
up(&isert_np->np_sem);
return 0;
@@ -705,6 +712,7 @@ out_login_buf:
kfree(isert_conn->login_buf);
out:
kfree(isert_conn);
+ rdma_reject(cma_id, NULL, 0);
return ret;
}
@@ -713,24 +721,25 @@ isert_connect_release(struct isert_conn *isert_conn)
{
struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
struct isert_device *device = isert_conn->conn_device;
- int cq_index;
- pr_debug("Entering isert_connect_release(): >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
+ isert_dbg("conn %p\n", isert_conn);
if (device && device->use_fastreg)
isert_conn_free_fastreg_pool(isert_conn);
+ isert_free_rx_descriptors(isert_conn);
+ rdma_destroy_id(isert_conn->conn_cm_id);
+
if (isert_conn->conn_qp) {
- cq_index = ((struct isert_cq_desc *)
- isert_conn->conn_qp->recv_cq->cq_context)->cq_index;
- pr_debug("isert_connect_release: cq_index: %d\n", cq_index);
- isert_conn->conn_device->cq_active_qps[cq_index]--;
+ struct isert_comp *comp = isert_conn->conn_qp->recv_cq->cq_context;
- rdma_destroy_qp(isert_conn->conn_cm_id);
- }
+ isert_dbg("dec completion context %p active_qps\n", comp);
+ mutex_lock(&device_list_mutex);
+ comp->active_qps--;
+ mutex_unlock(&device_list_mutex);
- isert_free_rx_descriptors(isert_conn);
- rdma_destroy_id(isert_conn->conn_cm_id);
+ ib_destroy_qp(isert_conn->conn_qp);
+ }
ib_dereg_mr(isert_conn->conn_mr);
ib_dealloc_pd(isert_conn->conn_pd);
@@ -747,16 +756,24 @@ isert_connect_release(struct isert_conn *isert_conn)
if (device)
isert_device_try_release(device);
-
- pr_debug("Leaving isert_connect_release >>>>>>>>>>>>\n");
}
static void
isert_connected_handler(struct rdma_cm_id *cma_id)
{
- struct isert_conn *isert_conn = cma_id->context;
+ struct isert_conn *isert_conn = cma_id->qp->qp_context;
- kref_get(&isert_conn->conn_kref);
+ isert_info("conn %p\n", isert_conn);
+
+ if (!kref_get_unless_zero(&isert_conn->conn_kref)) {
+ isert_warn("conn %p connect_release is running\n", isert_conn);
+ return;
+ }
+
+ mutex_lock(&isert_conn->conn_mutex);
+ if (isert_conn->state != ISER_CONN_FULL_FEATURE)
+ isert_conn->state = ISER_CONN_UP;
+ mutex_unlock(&isert_conn->conn_mutex);
}
static void
@@ -765,8 +782,8 @@ isert_release_conn_kref(struct kref *kref)
struct isert_conn *isert_conn = container_of(kref,
struct isert_conn, conn_kref);
- pr_debug("Calling isert_connect_release for final kref %s/%d\n",
- current->comm, current->pid);
+ isert_info("conn %p final kref %s/%d\n", isert_conn, current->comm,
+ current->pid);
isert_connect_release(isert_conn);
}
@@ -777,75 +794,111 @@ isert_put_conn(struct isert_conn *isert_conn)
kref_put(&isert_conn->conn_kref, isert_release_conn_kref);
}
+/**
+ * isert_conn_terminate() - Initiate connection termination
+ * @isert_conn: isert connection struct
+ *
+ * Notes:
+ * In case the connection state is FULL_FEATURE, move state
+ * to TEMINATING and start teardown sequence (rdma_disconnect).
+ * In case the connection state is UP, complete flush as well.
+ *
+ * This routine must be called with conn_mutex held. Thus it is
+ * safe to call multiple times.
+ */
static void
-isert_disconnect_work(struct work_struct *work)
+isert_conn_terminate(struct isert_conn *isert_conn)
{
- struct isert_conn *isert_conn = container_of(work,
- struct isert_conn, conn_logout_work);
+ int err;
- pr_debug("isert_disconnect_work(): >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
- mutex_lock(&isert_conn->conn_mutex);
- if (isert_conn->state == ISER_CONN_UP)
+ switch (isert_conn->state) {
+ case ISER_CONN_TERMINATING:
+ break;
+ case ISER_CONN_UP:
+ case ISER_CONN_FULL_FEATURE: /* FALLTHRU */
+ isert_info("Terminating conn %p state %d\n",
+ isert_conn, isert_conn->state);
isert_conn->state = ISER_CONN_TERMINATING;
-
- if (isert_conn->post_recv_buf_count == 0 &&
- atomic_read(&isert_conn->post_send_buf_count) == 0) {
- mutex_unlock(&isert_conn->conn_mutex);
- goto wake_up;
- }
- if (!isert_conn->conn_cm_id) {
- mutex_unlock(&isert_conn->conn_mutex);
- isert_put_conn(isert_conn);
- return;
+ err = rdma_disconnect(isert_conn->conn_cm_id);
+ if (err)
+ isert_warn("Failed rdma_disconnect isert_conn %p\n",
+ isert_conn);
+ break;
+ default:
+ isert_warn("conn %p teminating in state %d\n",
+ isert_conn, isert_conn->state);
}
+}
- if (isert_conn->disconnect) {
- /* Send DREQ/DREP towards our initiator */
- rdma_disconnect(isert_conn->conn_cm_id);
- }
+static int
+isert_np_cma_handler(struct isert_np *isert_np,
+ enum rdma_cm_event_type event)
+{
+ isert_dbg("isert np %p, handling event %d\n", isert_np, event);
- mutex_unlock(&isert_conn->conn_mutex);
+ switch (event) {
+ case RDMA_CM_EVENT_DEVICE_REMOVAL:
+ isert_np->np_cm_id = NULL;
+ break;
+ case RDMA_CM_EVENT_ADDR_CHANGE:
+ isert_np->np_cm_id = isert_setup_id(isert_np);
+ if (IS_ERR(isert_np->np_cm_id)) {
+ isert_err("isert np %p setup id failed: %ld\n",
+ isert_np, PTR_ERR(isert_np->np_cm_id));
+ isert_np->np_cm_id = NULL;
+ }
+ break;
+ default:
+ isert_err("isert np %p Unexpected event %d\n",
+ isert_np, event);
+ }
-wake_up:
- complete(&isert_conn->conn_wait);
+ return -1;
}
static int
-isert_disconnected_handler(struct rdma_cm_id *cma_id, bool disconnect)
+isert_disconnected_handler(struct rdma_cm_id *cma_id,
+ enum rdma_cm_event_type event)
{
+ struct isert_np *isert_np = cma_id->context;
struct isert_conn *isert_conn;
- if (!cma_id->qp) {
- struct isert_np *isert_np = cma_id->context;
+ if (isert_np->np_cm_id == cma_id)
+ return isert_np_cma_handler(cma_id->context, event);
- isert_np->np_cm_id = NULL;
- return -1;
- }
+ isert_conn = cma_id->qp->qp_context;
- isert_conn = (struct isert_conn *)cma_id->context;
+ mutex_lock(&isert_conn->conn_mutex);
+ isert_conn_terminate(isert_conn);
+ mutex_unlock(&isert_conn->conn_mutex);
- isert_conn->disconnect = disconnect;
- INIT_WORK(&isert_conn->conn_logout_work, isert_disconnect_work);
- schedule_work(&isert_conn->conn_logout_work);
+ isert_info("conn %p completing conn_wait\n", isert_conn);
+ complete(&isert_conn->conn_wait);
return 0;
}
+static void
+isert_connect_error(struct rdma_cm_id *cma_id)
+{
+ struct isert_conn *isert_conn = cma_id->qp->qp_context;
+
+ isert_put_conn(isert_conn);
+}
+
static int
isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
{
int ret = 0;
- bool disconnect = false;
- pr_debug("isert_cma_handler: event %d status %d conn %p id %p\n",
- event->event, event->status, cma_id->context, cma_id);
+ isert_info("event %d status %d id %p np %p\n", event->event,
+ event->status, cma_id, cma_id->context);
switch (event->event) {
case RDMA_CM_EVENT_CONNECT_REQUEST:
ret = isert_connect_request(cma_id, event);
if (ret)
- pr_err("isert_cma_handler failed RDMA_CM_EVENT: 0x%08x %d\n",
- event->event, ret);
+ isert_err("failed handle connect request %d\n", ret);
break;
case RDMA_CM_EVENT_ESTABLISHED:
isert_connected_handler(cma_id);
@@ -853,13 +906,16 @@ isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
case RDMA_CM_EVENT_ADDR_CHANGE: /* FALLTHRU */
case RDMA_CM_EVENT_DISCONNECTED: /* FALLTHRU */
case RDMA_CM_EVENT_DEVICE_REMOVAL: /* FALLTHRU */
- disconnect = true;
case RDMA_CM_EVENT_TIMEWAIT_EXIT: /* FALLTHRU */
- ret = isert_disconnected_handler(cma_id, disconnect);
+ ret = isert_disconnected_handler(cma_id, event->event);
break;
+ case RDMA_CM_EVENT_REJECTED: /* FALLTHRU */
+ case RDMA_CM_EVENT_UNREACHABLE: /* FALLTHRU */
case RDMA_CM_EVENT_CONNECT_ERROR:
+ isert_connect_error(cma_id);
+ break;
default:
- pr_err("Unhandled RDMA CMA event: %d\n", event->event);
+ isert_err("Unhandled RDMA CMA event: %d\n", event->event);
break;
}
@@ -876,7 +932,7 @@ isert_post_recv(struct isert_conn *isert_conn, u32 count)
for (rx_wr = isert_conn->conn_rx_wr, i = 0; i < count; i++, rx_wr++) {
rx_desc = &isert_conn->conn_rx_descs[rx_head];
- rx_wr->wr_id = (unsigned long)rx_desc;
+ rx_wr->wr_id = (uintptr_t)rx_desc;
rx_wr->sg_list = &rx_desc->rx_sg;
rx_wr->num_sge = 1;
rx_wr->next = rx_wr + 1;
@@ -890,10 +946,10 @@ isert_post_recv(struct isert_conn *isert_conn, u32 count)
ret = ib_post_recv(isert_conn->conn_qp, isert_conn->conn_rx_wr,
&rx_wr_failed);
if (ret) {
- pr_err("ib_post_recv() failed with ret: %d\n", ret);
+ isert_err("ib_post_recv() failed with ret: %d\n", ret);
isert_conn->post_recv_buf_count -= count;
} else {
- pr_debug("isert_post_recv(): Posted %d RX buffers\n", count);
+ isert_dbg("isert_post_recv(): Posted %d RX buffers\n", count);
isert_conn->conn_rx_desc_head = rx_head;
}
return ret;
@@ -910,19 +966,15 @@ isert_post_send(struct isert_conn *isert_conn, struct iser_tx_desc *tx_desc)
ISER_HEADERS_LEN, DMA_TO_DEVICE);
send_wr.next = NULL;
- send_wr.wr_id = (unsigned long)tx_desc;
+ send_wr.wr_id = (uintptr_t)tx_desc;
send_wr.sg_list = tx_desc->tx_sg;
send_wr.num_sge = tx_desc->num_sge;
send_wr.opcode = IB_WR_SEND;
send_wr.send_flags = IB_SEND_SIGNALED;
- atomic_inc(&isert_conn->post_send_buf_count);
-
ret = ib_post_send(isert_conn->conn_qp, &send_wr, &send_wr_failed);
- if (ret) {
- pr_err("ib_post_send() failed, ret: %d\n", ret);
- atomic_dec(&isert_conn->post_send_buf_count);
- }
+ if (ret)
+ isert_err("ib_post_send() failed, ret: %d\n", ret);
return ret;
}
@@ -945,7 +997,7 @@ isert_create_send_desc(struct isert_conn *isert_conn,
if (tx_desc->tx_sg[0].lkey != isert_conn->conn_mr->lkey) {
tx_desc->tx_sg[0].lkey = isert_conn->conn_mr->lkey;
- pr_debug("tx_desc %p lkey mismatch, fixing\n", tx_desc);
+ isert_dbg("tx_desc %p lkey mismatch, fixing\n", tx_desc);
}
}
@@ -959,7 +1011,7 @@ isert_init_tx_hdrs(struct isert_conn *isert_conn,
dma_addr = ib_dma_map_single(ib_dev, (void *)tx_desc,
ISER_HEADERS_LEN, DMA_TO_DEVICE);
if (ib_dma_mapping_error(ib_dev, dma_addr)) {
- pr_err("ib_dma_mapping_error() failed\n");
+ isert_err("ib_dma_mapping_error() failed\n");
return -ENOMEM;
}
@@ -968,40 +1020,24 @@ isert_init_tx_hdrs(struct isert_conn *isert_conn,
tx_desc->tx_sg[0].length = ISER_HEADERS_LEN;
tx_desc->tx_sg[0].lkey = isert_conn->conn_mr->lkey;
- pr_debug("isert_init_tx_hdrs: Setup tx_sg[0].addr: 0x%llx length: %u"
- " lkey: 0x%08x\n", tx_desc->tx_sg[0].addr,
- tx_desc->tx_sg[0].length, tx_desc->tx_sg[0].lkey);
+ isert_dbg("Setup tx_sg[0].addr: 0x%llx length: %u lkey: 0x%x\n",
+ tx_desc->tx_sg[0].addr, tx_desc->tx_sg[0].length,
+ tx_desc->tx_sg[0].lkey);
return 0;
}
static void
isert_init_send_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
- struct ib_send_wr *send_wr, bool coalesce)
+ struct ib_send_wr *send_wr)
{
struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc;
isert_cmd->rdma_wr.iser_ib_op = ISER_IB_SEND;
- send_wr->wr_id = (unsigned long)&isert_cmd->tx_desc;
+ send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc;
send_wr->opcode = IB_WR_SEND;
send_wr->sg_list = &tx_desc->tx_sg[0];
send_wr->num_sge = isert_cmd->tx_desc.num_sge;
- /*
- * Coalesce send completion interrupts by only setting IB_SEND_SIGNALED
- * bit for every ISERT_COMP_BATCH_COUNT number of ib_post_send() calls.
- */
- mutex_lock(&isert_conn->conn_mutex);
- if (coalesce && isert_conn->state == ISER_CONN_UP &&
- ++isert_conn->conn_comp_batch < ISERT_COMP_BATCH_COUNT) {
- tx_desc->llnode_active = true;
- llist_add(&tx_desc->comp_llnode, &isert_conn->conn_comp_llist);
- mutex_unlock(&isert_conn->conn_mutex);
- return;
- }
- isert_conn->conn_comp_batch = 0;
- tx_desc->comp_llnode_batch = llist_del_all(&isert_conn->conn_comp_llist);
- mutex_unlock(&isert_conn->conn_mutex);
-
send_wr->send_flags = IB_SEND_SIGNALED;
}
@@ -1017,22 +1053,21 @@ isert_rdma_post_recvl(struct isert_conn *isert_conn)
sge.length = ISER_RX_LOGIN_SIZE;
sge.lkey = isert_conn->conn_mr->lkey;
- pr_debug("Setup sge: addr: %llx length: %d 0x%08x\n",
+ isert_dbg("Setup sge: addr: %llx length: %d 0x%08x\n",
sge.addr, sge.length, sge.lkey);
memset(&rx_wr, 0, sizeof(struct ib_recv_wr));
- rx_wr.wr_id = (unsigned long)isert_conn->login_req_buf;
+ rx_wr.wr_id = (uintptr_t)isert_conn->login_req_buf;
rx_wr.sg_list = &sge;
rx_wr.num_sge = 1;
isert_conn->post_recv_buf_count++;
ret = ib_post_recv(isert_conn->conn_qp, &rx_wr, &rx_wr_fail);
if (ret) {
- pr_err("ib_post_recv() failed: %d\n", ret);
+ isert_err("ib_post_recv() failed: %d\n", ret);
isert_conn->post_recv_buf_count--;
}
- pr_debug("ib_post_recv(): returned success >>>>>>>>>>>>>>>>>>>>>>>>\n");
return ret;
}
@@ -1072,13 +1107,9 @@ isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login,
if (login->login_complete) {
if (!conn->sess->sess_ops->SessionType &&
isert_conn->conn_device->use_fastreg) {
- /* Normal Session and fastreg is used */
- u8 pi_support = login->np->tpg_np->tpg->tpg_attrib.t10_pi;
-
- ret = isert_conn_create_fastreg_pool(isert_conn,
- pi_support);
+ ret = isert_conn_create_fastreg_pool(isert_conn);
if (ret) {
- pr_err("Conn: %p failed to create"
+ isert_err("Conn: %p failed to create"
" fastreg pool\n", isert_conn);
return ret;
}
@@ -1092,7 +1123,10 @@ isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login,
if (ret)
return ret;
- isert_conn->state = ISER_CONN_UP;
+ /* Now we are in FULL_FEATURE phase */
+ mutex_lock(&isert_conn->conn_mutex);
+ isert_conn->state = ISER_CONN_FULL_FEATURE;
+ mutex_unlock(&isert_conn->conn_mutex);
goto post_send;
}
@@ -1109,18 +1143,17 @@ post_send:
}
static void
-isert_rx_login_req(struct iser_rx_desc *rx_desc, int rx_buflen,
- struct isert_conn *isert_conn)
+isert_rx_login_req(struct isert_conn *isert_conn)
{
+ struct iser_rx_desc *rx_desc = (void *)isert_conn->login_req_buf;
+ int rx_buflen = isert_conn->login_req_len;
struct iscsi_conn *conn = isert_conn->conn;
struct iscsi_login *login = conn->conn_login;
int size;
- if (!login) {
- pr_err("conn->conn_login is NULL\n");
- dump_stack();
- return;
- }
+ isert_info("conn %p\n", isert_conn);
+
+ WARN_ON_ONCE(!login);
if (login->first_request) {
struct iscsi_login_req *login_req =
@@ -1146,8 +1179,9 @@ isert_rx_login_req(struct iser_rx_desc *rx_desc, int rx_buflen,
memcpy(&login->req[0], (void *)&rx_desc->iscsi_header, ISCSI_HDR_LEN);
size = min(rx_buflen, MAX_KEY_VALUE_PAIRS);
- pr_debug("Using login payload size: %d, rx_buflen: %d MAX_KEY_VALUE_PAIRS: %d\n",
- size, rx_buflen, MAX_KEY_VALUE_PAIRS);
+ isert_dbg("Using login payload size: %d, rx_buflen: %d "
+ "MAX_KEY_VALUE_PAIRS: %d\n", size, rx_buflen,
+ MAX_KEY_VALUE_PAIRS);
memcpy(login->req_buf, &rx_desc->data[0], size);
if (login->first_request) {
@@ -1166,7 +1200,7 @@ static struct iscsi_cmd
cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
if (!cmd) {
- pr_err("Unable to allocate iscsi_cmd + isert_cmd\n");
+ isert_err("Unable to allocate iscsi_cmd + isert_cmd\n");
return NULL;
}
isert_cmd = iscsit_priv_cmd(cmd);
@@ -1209,8 +1243,8 @@ isert_handle_scsi_cmd(struct isert_conn *isert_conn,
sg = &cmd->se_cmd.t_data_sg[0];
sg_nents = max(1UL, DIV_ROUND_UP(imm_data_len, PAGE_SIZE));
- pr_debug("Copying Immediate SG: %p sg_nents: %u from %p imm_data_len: %d\n",
- sg, sg_nents, &rx_desc->data[0], imm_data_len);
+ isert_dbg("Copying Immediate SG: %p sg_nents: %u from %p imm_data_len: %d\n",
+ sg, sg_nents, &rx_desc->data[0], imm_data_len);
sg_copy_from_buffer(sg, sg_nents, &rx_desc->data[0], imm_data_len);
@@ -1254,13 +1288,15 @@ isert_handle_iscsi_dataout(struct isert_conn *isert_conn,
* FIXME: Unexpected unsolicited_data out
*/
if (!cmd->unsolicited_data) {
- pr_err("Received unexpected solicited data payload\n");
+ isert_err("Received unexpected solicited data payload\n");
dump_stack();
return -1;
}
- pr_debug("Unsolicited DataOut unsol_data_len: %u, write_data_done: %u, data_length: %u\n",
- unsol_data_len, cmd->write_data_done, cmd->se_cmd.data_length);
+ isert_dbg("Unsolicited DataOut unsol_data_len: %u, "
+ "write_data_done: %u, data_length: %u\n",
+ unsol_data_len, cmd->write_data_done,
+ cmd->se_cmd.data_length);
sg_off = cmd->write_data_done / PAGE_SIZE;
sg_start = &cmd->se_cmd.t_data_sg[sg_off];
@@ -1270,12 +1306,13 @@ isert_handle_iscsi_dataout(struct isert_conn *isert_conn,
* FIXME: Non page-aligned unsolicited_data out
*/
if (page_off) {
- pr_err("Received unexpected non-page aligned data payload\n");
+ isert_err("unexpected non-page aligned data payload\n");
dump_stack();
return -1;
}
- pr_debug("Copying DataOut: sg_start: %p, sg_off: %u sg_nents: %u from %p %u\n",
- sg_start, sg_off, sg_nents, &rx_desc->data[0], unsol_data_len);
+ isert_dbg("Copying DataOut: sg_start: %p, sg_off: %u "
+ "sg_nents: %u from %p %u\n", sg_start, sg_off,
+ sg_nents, &rx_desc->data[0], unsol_data_len);
sg_copy_from_buffer(sg_start, sg_nents, &rx_desc->data[0],
unsol_data_len);
@@ -1322,8 +1359,8 @@ isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd
text_in = kzalloc(payload_length, GFP_KERNEL);
if (!text_in) {
- pr_err("Unable to allocate text_in of payload_length: %u\n",
- payload_length);
+ isert_err("Unable to allocate text_in of payload_length: %u\n",
+ payload_length);
return -ENOMEM;
}
cmd->text_in_ptr = text_in;
@@ -1348,8 +1385,8 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
if (sess->sess_ops->SessionType &&
(!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) {
- pr_err("Got illegal opcode: 0x%02x in SessionType=Discovery,"
- " ignoring\n", opcode);
+ isert_err("Got illegal opcode: 0x%02x in SessionType=Discovery,"
+ " ignoring\n", opcode);
return 0;
}
@@ -1395,10 +1432,6 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
break;
ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr);
- if (ret > 0)
- wait_for_completion_timeout(&conn->conn_logout_comp,
- SECONDS_FOR_LOGOUT_COMP *
- HZ);
break;
case ISCSI_OP_TEXT:
cmd = isert_allocate_cmd(conn);
@@ -1410,7 +1443,7 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
rx_desc, (struct iscsi_text *)hdr);
break;
default:
- pr_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode);
+ isert_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode);
dump_stack();
break;
}
@@ -1431,23 +1464,23 @@ isert_rx_do_work(struct iser_rx_desc *rx_desc, struct isert_conn *isert_conn)
if (iser_hdr->flags & ISER_RSV) {
read_stag = be32_to_cpu(iser_hdr->read_stag);
read_va = be64_to_cpu(iser_hdr->read_va);
- pr_debug("ISER_RSV: read_stag: 0x%08x read_va: 0x%16llx\n",
- read_stag, (unsigned long long)read_va);
+ isert_dbg("ISER_RSV: read_stag: 0x%x read_va: 0x%llx\n",
+ read_stag, (unsigned long long)read_va);
}
if (iser_hdr->flags & ISER_WSV) {
write_stag = be32_to_cpu(iser_hdr->write_stag);
write_va = be64_to_cpu(iser_hdr->write_va);
- pr_debug("ISER_WSV: write__stag: 0x%08x write_va: 0x%16llx\n",
- write_stag, (unsigned long long)write_va);
+ isert_dbg("ISER_WSV: write_stag: 0x%x write_va: 0x%llx\n",
+ write_stag, (unsigned long long)write_va);
}
- pr_debug("ISER ISCSI_CTRL PDU\n");
+ isert_dbg("ISER ISCSI_CTRL PDU\n");
break;
case ISER_HELLO:
- pr_err("iSER Hello message\n");
+ isert_err("iSER Hello message\n");
break;
default:
- pr_warn("Unknown iSER hdr flags: 0x%02x\n", iser_hdr->flags);
+ isert_warn("Unknown iSER hdr flags: 0x%02x\n", iser_hdr->flags);
break;
}
@@ -1457,7 +1490,7 @@ isert_rx_do_work(struct iser_rx_desc *rx_desc, struct isert_conn *isert_conn)
static void
isert_rx_completion(struct iser_rx_desc *desc, struct isert_conn *isert_conn,
- unsigned long xfer_len)
+ u32 xfer_len)
{
struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
struct iscsi_hdr *hdr;
@@ -1467,34 +1500,43 @@ isert_rx_completion(struct iser_rx_desc *desc, struct isert_conn *isert_conn,
if ((char *)desc == isert_conn->login_req_buf) {
rx_dma = isert_conn->login_req_dma;
rx_buflen = ISER_RX_LOGIN_SIZE;
- pr_debug("ISER login_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n",
+ isert_dbg("login_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n",
rx_dma, rx_buflen);
} else {
rx_dma = desc->dma_addr;
rx_buflen = ISER_RX_PAYLOAD_SIZE;
- pr_debug("ISER req_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n",
+ isert_dbg("req_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n",
rx_dma, rx_buflen);
}
ib_dma_sync_single_for_cpu(ib_dev, rx_dma, rx_buflen, DMA_FROM_DEVICE);
hdr = &desc->iscsi_header;
- pr_debug("iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n",
+ isert_dbg("iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n",
hdr->opcode, hdr->itt, hdr->flags,
(int)(xfer_len - ISER_HEADERS_LEN));
- if ((char *)desc == isert_conn->login_req_buf)
- isert_rx_login_req(desc, xfer_len - ISER_HEADERS_LEN,
- isert_conn);
- else
+ if ((char *)desc == isert_conn->login_req_buf) {
+ isert_conn->login_req_len = xfer_len - ISER_HEADERS_LEN;
+ if (isert_conn->conn) {
+ struct iscsi_login *login = isert_conn->conn->conn_login;
+
+ if (login && !login->first_request)
+ isert_rx_login_req(isert_conn);
+ }
+ mutex_lock(&isert_conn->conn_mutex);
+ complete(&isert_conn->login_req_comp);
+ mutex_unlock(&isert_conn->conn_mutex);
+ } else {
isert_rx_do_work(desc, isert_conn);
+ }
ib_dma_sync_single_for_device(ib_dev, rx_dma, rx_buflen,
DMA_FROM_DEVICE);
isert_conn->post_recv_buf_count--;
- pr_debug("iSERT: Decremented post_recv_buf_count: %d\n",
- isert_conn->post_recv_buf_count);
+ isert_dbg("Decremented post_recv_buf_count: %d\n",
+ isert_conn->post_recv_buf_count);
if ((char *)desc == isert_conn->login_req_buf)
return;
@@ -1505,7 +1547,7 @@ isert_rx_completion(struct iser_rx_desc *desc, struct isert_conn *isert_conn,
ISERT_MIN_POSTED_RX);
err = isert_post_recv(isert_conn, count);
if (err) {
- pr_err("isert_post_recv() count: %d failed, %d\n",
+ isert_err("isert_post_recv() count: %d failed, %d\n",
count, err);
}
}
@@ -1534,12 +1576,12 @@ isert_map_data_buf(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
data->dma_nents = ib_dma_map_sg(ib_dev, data->sg, data->nents,
data->dma_dir);
if (unlikely(!data->dma_nents)) {
- pr_err("Cmd: unable to dma map SGs %p\n", sg);
+ isert_err("Cmd: unable to dma map SGs %p\n", sg);
return -EINVAL;
}
- pr_debug("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n",
- isert_cmd, data->dma_nents, data->sg, data->nents, data->len);
+ isert_dbg("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n",
+ isert_cmd, data->dma_nents, data->sg, data->nents, data->len);
return 0;
}
@@ -1560,21 +1602,21 @@ isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn)
{
struct isert_rdma_wr *wr = &isert_cmd->rdma_wr;
- pr_debug("isert_unmap_cmd: %p\n", isert_cmd);
+ isert_dbg("Cmd %p\n", isert_cmd);
if (wr->data.sg) {
- pr_debug("isert_unmap_cmd: %p unmap_sg op\n", isert_cmd);
+ isert_dbg("Cmd %p unmap_sg op\n", isert_cmd);
isert_unmap_data_buf(isert_conn, &wr->data);
}
if (wr->send_wr) {
- pr_debug("isert_unmap_cmd: %p free send_wr\n", isert_cmd);
+ isert_dbg("Cmd %p free send_wr\n", isert_cmd);
kfree(wr->send_wr);
wr->send_wr = NULL;
}
if (wr->ib_sge) {
- pr_debug("isert_unmap_cmd: %p free ib_sge\n", isert_cmd);
+ isert_dbg("Cmd %p free ib_sge\n", isert_cmd);
kfree(wr->ib_sge);
wr->ib_sge = NULL;
}
@@ -1586,11 +1628,10 @@ isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn)
struct isert_rdma_wr *wr = &isert_cmd->rdma_wr;
LIST_HEAD(unmap_list);
- pr_debug("unreg_fastreg_cmd: %p\n", isert_cmd);
+ isert_dbg("Cmd %p\n", isert_cmd);
if (wr->fr_desc) {
- pr_debug("unreg_fastreg_cmd: %p free fr_desc %p\n",
- isert_cmd, wr->fr_desc);
+ isert_dbg("Cmd %p free fr_desc %p\n", isert_cmd, wr->fr_desc);
if (wr->fr_desc->ind & ISERT_PROTECTED) {
isert_unmap_data_buf(isert_conn, &wr->prot);
wr->fr_desc->ind &= ~ISERT_PROTECTED;
@@ -1602,7 +1643,7 @@ isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn)
}
if (wr->data.sg) {
- pr_debug("unreg_fastreg_cmd: %p unmap_sg op\n", isert_cmd);
+ isert_dbg("Cmd %p unmap_sg op\n", isert_cmd);
isert_unmap_data_buf(isert_conn, &wr->data);
}
@@ -1618,7 +1659,7 @@ isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err)
struct iscsi_conn *conn = isert_conn->conn;
struct isert_device *device = isert_conn->conn_device;
- pr_debug("Entering isert_put_cmd: %p\n", isert_cmd);
+ isert_dbg("Cmd %p\n", isert_cmd);
switch (cmd->iscsi_opcode) {
case ISCSI_OP_SCSI_CMD:
@@ -1668,7 +1709,7 @@ isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err)
* associated cmd->se_cmd needs to be released.
*/
if (cmd->se_cmd.se_tfo != NULL) {
- pr_debug("Calling transport_generic_free_cmd from"
+ isert_dbg("Calling transport_generic_free_cmd from"
" isert_put_cmd for 0x%02x\n",
cmd->iscsi_opcode);
transport_generic_free_cmd(&cmd->se_cmd, 0);
@@ -1687,7 +1728,7 @@ static void
isert_unmap_tx_desc(struct iser_tx_desc *tx_desc, struct ib_device *ib_dev)
{
if (tx_desc->dma_addr != 0) {
- pr_debug("Calling ib_dma_unmap_single for tx_desc->dma_addr\n");
+ isert_dbg("unmap single for tx_desc->dma_addr\n");
ib_dma_unmap_single(ib_dev, tx_desc->dma_addr,
ISER_HEADERS_LEN, DMA_TO_DEVICE);
tx_desc->dma_addr = 0;
@@ -1699,7 +1740,7 @@ isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd,
struct ib_device *ib_dev, bool comp_err)
{
if (isert_cmd->pdu_buf_dma != 0) {
- pr_debug("Calling ib_dma_unmap_single for isert_cmd->pdu_buf_dma\n");
+ isert_dbg("unmap single for isert_cmd->pdu_buf_dma\n");
ib_dma_unmap_single(ib_dev, isert_cmd->pdu_buf_dma,
isert_cmd->pdu_buf_len, DMA_TO_DEVICE);
isert_cmd->pdu_buf_dma = 0;
@@ -1717,7 +1758,7 @@ isert_check_pi_status(struct se_cmd *se_cmd, struct ib_mr *sig_mr)
ret = ib_check_mr_status(sig_mr, IB_MR_CHECK_SIG_STATUS, &mr_status);
if (ret) {
- pr_err("ib_check_mr_status failed, ret %d\n", ret);
+ isert_err("ib_check_mr_status failed, ret %d\n", ret);
goto fail_mr_status;
}
@@ -1740,12 +1781,12 @@ isert_check_pi_status(struct se_cmd *se_cmd, struct ib_mr *sig_mr)
do_div(sec_offset_err, block_size);
se_cmd->bad_sector = sec_offset_err + se_cmd->t_task_lba;
- pr_err("isert: PI error found type %d at sector 0x%llx "
- "expected 0x%x vs actual 0x%x\n",
- mr_status.sig_err.err_type,
- (unsigned long long)se_cmd->bad_sector,
- mr_status.sig_err.expected,
- mr_status.sig_err.actual);
+ isert_err("PI error found type %d at sector 0x%llx "
+ "expected 0x%x vs actual 0x%x\n",
+ mr_status.sig_err.err_type,
+ (unsigned long long)se_cmd->bad_sector,
+ mr_status.sig_err.expected,
+ mr_status.sig_err.actual);
ret = 1;
}
@@ -1801,7 +1842,7 @@ isert_completion_rdma_read(struct iser_tx_desc *tx_desc,
cmd->write_data_done = wr->data.len;
wr->send_wr_num = 0;
- pr_debug("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd);
+ isert_dbg("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd);
spin_lock_bh(&cmd->istate_lock);
cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT;
cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT;
@@ -1823,36 +1864,22 @@ isert_do_control_comp(struct work_struct *work)
struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
+ isert_dbg("Cmd %p i_state %d\n", isert_cmd, cmd->i_state);
+
switch (cmd->i_state) {
case ISTATE_SEND_TASKMGTRSP:
- pr_debug("Calling iscsit_tmr_post_handler >>>>>>>>>>>>>>>>>\n");
-
- atomic_dec(&isert_conn->post_send_buf_count);
iscsit_tmr_post_handler(cmd, cmd->conn);
-
- cmd->i_state = ISTATE_SENT_STATUS;
- isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev, false);
- break;
- case ISTATE_SEND_REJECT:
- pr_debug("Got isert_do_control_comp ISTATE_SEND_REJECT: >>>\n");
- atomic_dec(&isert_conn->post_send_buf_count);
-
+ case ISTATE_SEND_REJECT: /* FALLTHRU */
+ case ISTATE_SEND_TEXTRSP: /* FALLTHRU */
cmd->i_state = ISTATE_SENT_STATUS;
- isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev, false);
+ isert_completion_put(&isert_cmd->tx_desc, isert_cmd,
+ ib_dev, false);
break;
case ISTATE_SEND_LOGOUTRSP:
- pr_debug("Calling iscsit_logout_post_handler >>>>>>>>>>>>>>\n");
-
- atomic_dec(&isert_conn->post_send_buf_count);
iscsit_logout_post_handler(cmd, cmd->conn);
break;
- case ISTATE_SEND_TEXTRSP:
- atomic_dec(&isert_conn->post_send_buf_count);
- cmd->i_state = ISTATE_SENT_STATUS;
- isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev, false);
- break;
default:
- pr_err("Unknown do_control_comp i_state %d\n", cmd->i_state);
+ isert_err("Unknown i_state %d\n", cmd->i_state);
dump_stack();
break;
}
@@ -1865,7 +1892,6 @@ isert_response_completion(struct iser_tx_desc *tx_desc,
struct ib_device *ib_dev)
{
struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
- struct isert_rdma_wr *wr = &isert_cmd->rdma_wr;
if (cmd->i_state == ISTATE_SEND_TASKMGTRSP ||
cmd->i_state == ISTATE_SEND_LOGOUTRSP ||
@@ -1878,267 +1904,151 @@ isert_response_completion(struct iser_tx_desc *tx_desc,
return;
}
- /**
- * If send_wr_num is 0 this means that we got
- * RDMA completion and we cleared it and we should
- * simply decrement the response post. else the
- * response is incorporated in send_wr_num, just
- * sub it.
- **/
- if (wr->send_wr_num)
- atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count);
- else
- atomic_dec(&isert_conn->post_send_buf_count);
-
cmd->i_state = ISTATE_SENT_STATUS;
isert_completion_put(tx_desc, isert_cmd, ib_dev, false);
}
static void
-__isert_send_completion(struct iser_tx_desc *tx_desc,
- struct isert_conn *isert_conn)
+isert_send_completion(struct iser_tx_desc *tx_desc,
+ struct isert_conn *isert_conn)
{
struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
struct isert_cmd *isert_cmd = tx_desc->isert_cmd;
struct isert_rdma_wr *wr;
if (!isert_cmd) {
- atomic_dec(&isert_conn->post_send_buf_count);
isert_unmap_tx_desc(tx_desc, ib_dev);
return;
}
wr = &isert_cmd->rdma_wr;
+ isert_dbg("Cmd %p iser_ib_op %d\n", isert_cmd, wr->iser_ib_op);
+
switch (wr->iser_ib_op) {
case ISER_IB_RECV:
- pr_err("isert_send_completion: Got ISER_IB_RECV\n");
+ isert_err("Got ISER_IB_RECV\n");
dump_stack();
break;
case ISER_IB_SEND:
- pr_debug("isert_send_completion: Got ISER_IB_SEND\n");
isert_response_completion(tx_desc, isert_cmd,
isert_conn, ib_dev);
break;
case ISER_IB_RDMA_WRITE:
- pr_debug("isert_send_completion: Got ISER_IB_RDMA_WRITE\n");
- atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count);
isert_completion_rdma_write(tx_desc, isert_cmd);
break;
case ISER_IB_RDMA_READ:
- pr_debug("isert_send_completion: Got ISER_IB_RDMA_READ:\n");
-
- atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count);
isert_completion_rdma_read(tx_desc, isert_cmd);
break;
default:
- pr_err("Unknown wr->iser_ib_op: 0x%02x\n", wr->iser_ib_op);
+ isert_err("Unknown wr->iser_ib_op: 0x%x\n", wr->iser_ib_op);
dump_stack();
break;
}
}
-static void
-isert_send_completion(struct iser_tx_desc *tx_desc,
- struct isert_conn *isert_conn)
-{
- struct llist_node *llnode = tx_desc->comp_llnode_batch;
- struct iser_tx_desc *t;
- /*
- * Drain coalesced completion llist starting from comp_llnode_batch
- * setup in isert_init_send_wr(), and then complete trailing tx_desc.
- */
- while (llnode) {
- t = llist_entry(llnode, struct iser_tx_desc, comp_llnode);
- llnode = llist_next(llnode);
- __isert_send_completion(t, isert_conn);
- }
- __isert_send_completion(tx_desc, isert_conn);
-}
-
-static void
-isert_cq_drain_comp_llist(struct isert_conn *isert_conn, struct ib_device *ib_dev)
+/**
+ * is_isert_tx_desc() - Indicate if the completion wr_id
+ * is a TX descriptor or not.
+ * @isert_conn: iser connection
+ * @wr_id: completion WR identifier
+ *
+ * Since we cannot rely on wc opcode in FLUSH errors
+ * we must work around it by checking if the wr_id address
+ * falls in the iser connection rx_descs buffer. If so
+ * it is an RX descriptor, otherwize it is a TX.
+ */
+static inline bool
+is_isert_tx_desc(struct isert_conn *isert_conn, void *wr_id)
{
- struct llist_node *llnode;
- struct isert_rdma_wr *wr;
- struct iser_tx_desc *t;
+ void *start = isert_conn->conn_rx_descs;
+ int len = ISERT_QP_MAX_RECV_DTOS * sizeof(*isert_conn->conn_rx_descs);
- mutex_lock(&isert_conn->conn_mutex);
- llnode = llist_del_all(&isert_conn->conn_comp_llist);
- isert_conn->conn_comp_batch = 0;
- mutex_unlock(&isert_conn->conn_mutex);
-
- while (llnode) {
- t = llist_entry(llnode, struct iser_tx_desc, comp_llnode);
- llnode = llist_next(llnode);
- wr = &t->isert_cmd->rdma_wr;
-
- /**
- * If send_wr_num is 0 this means that we got
- * RDMA completion and we cleared it and we should
- * simply decrement the response post. else the
- * response is incorporated in send_wr_num, just
- * sub it.
- **/
- if (wr->send_wr_num)
- atomic_sub(wr->send_wr_num,
- &isert_conn->post_send_buf_count);
- else
- atomic_dec(&isert_conn->post_send_buf_count);
+ if (wr_id >= start && wr_id < start + len)
+ return false;
- isert_completion_put(t, t->isert_cmd, ib_dev, true);
- }
+ return true;
}
static void
-isert_cq_tx_comp_err(struct iser_tx_desc *tx_desc, struct isert_conn *isert_conn)
+isert_cq_comp_err(struct isert_conn *isert_conn, struct ib_wc *wc)
{
- struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
- struct isert_cmd *isert_cmd = tx_desc->isert_cmd;
- struct llist_node *llnode = tx_desc->comp_llnode_batch;
- struct isert_rdma_wr *wr;
- struct iser_tx_desc *t;
-
- while (llnode) {
- t = llist_entry(llnode, struct iser_tx_desc, comp_llnode);
- llnode = llist_next(llnode);
- wr = &t->isert_cmd->rdma_wr;
+ if (wc->wr_id == ISER_BEACON_WRID) {
+ isert_info("conn %p completing conn_wait_comp_err\n",
+ isert_conn);
+ complete(&isert_conn->conn_wait_comp_err);
+ } else if (is_isert_tx_desc(isert_conn, (void *)(uintptr_t)wc->wr_id)) {
+ struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
+ struct isert_cmd *isert_cmd;
+ struct iser_tx_desc *desc;
- /**
- * If send_wr_num is 0 this means that we got
- * RDMA completion and we cleared it and we should
- * simply decrement the response post. else the
- * response is incorporated in send_wr_num, just
- * sub it.
- **/
- if (wr->send_wr_num)
- atomic_sub(wr->send_wr_num,
- &isert_conn->post_send_buf_count);
+ desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id;
+ isert_cmd = desc->isert_cmd;
+ if (!isert_cmd)
+ isert_unmap_tx_desc(desc, ib_dev);
else
- atomic_dec(&isert_conn->post_send_buf_count);
-
- isert_completion_put(t, t->isert_cmd, ib_dev, true);
- }
- tx_desc->comp_llnode_batch = NULL;
-
- if (!isert_cmd)
- isert_unmap_tx_desc(tx_desc, ib_dev);
- else
- isert_completion_put(tx_desc, isert_cmd, ib_dev, true);
-}
-
-static void
-isert_cq_rx_comp_err(struct isert_conn *isert_conn)
-{
- struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
- struct iscsi_conn *conn = isert_conn->conn;
-
- if (isert_conn->post_recv_buf_count)
- return;
-
- isert_cq_drain_comp_llist(isert_conn, ib_dev);
-
- if (conn->sess) {
- target_sess_cmd_list_set_waiting(conn->sess->se_sess);
- target_wait_for_sess_cmds(conn->sess->se_sess);
+ isert_completion_put(desc, isert_cmd, ib_dev, true);
+ } else {
+ isert_conn->post_recv_buf_count--;
+ if (!isert_conn->post_recv_buf_count)
+ iscsit_cause_connection_reinstatement(isert_conn->conn, 0);
}
-
- while (atomic_read(&isert_conn->post_send_buf_count))
- msleep(3000);
-
- mutex_lock(&isert_conn->conn_mutex);
- isert_conn->state = ISER_CONN_DOWN;
- mutex_unlock(&isert_conn->conn_mutex);
-
- iscsit_cause_connection_reinstatement(isert_conn->conn, 0);
-
- complete(&isert_conn->conn_wait_comp_err);
}
static void
-isert_cq_tx_work(struct work_struct *work)
+isert_handle_wc(struct ib_wc *wc)
{
- struct isert_cq_desc *cq_desc = container_of(work,
- struct isert_cq_desc, cq_tx_work);
- struct isert_device *device = cq_desc->device;
- int cq_index = cq_desc->cq_index;
- struct ib_cq *tx_cq = device->dev_tx_cq[cq_index];
struct isert_conn *isert_conn;
struct iser_tx_desc *tx_desc;
- struct ib_wc wc;
-
- while (ib_poll_cq(tx_cq, 1, &wc) == 1) {
- tx_desc = (struct iser_tx_desc *)(unsigned long)wc.wr_id;
- isert_conn = wc.qp->qp_context;
+ struct iser_rx_desc *rx_desc;
- if (wc.status == IB_WC_SUCCESS) {
- isert_send_completion(tx_desc, isert_conn);
+ isert_conn = wc->qp->qp_context;
+ if (likely(wc->status == IB_WC_SUCCESS)) {
+ if (wc->opcode == IB_WC_RECV) {
+ rx_desc = (struct iser_rx_desc *)(uintptr_t)wc->wr_id;
+ isert_rx_completion(rx_desc, isert_conn, wc->byte_len);
} else {
- pr_debug("TX wc.status != IB_WC_SUCCESS >>>>>>>>>>>>>>\n");
- pr_debug("TX wc.status: 0x%08x\n", wc.status);
- pr_debug("TX wc.vendor_err: 0x%08x\n", wc.vendor_err);
-
- if (wc.wr_id != ISER_FASTREG_LI_WRID) {
- if (tx_desc->llnode_active)
- continue;
-
- atomic_dec(&isert_conn->post_send_buf_count);
- isert_cq_tx_comp_err(tx_desc, isert_conn);
- }
+ tx_desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id;
+ isert_send_completion(tx_desc, isert_conn);
}
- }
-
- ib_req_notify_cq(tx_cq, IB_CQ_NEXT_COMP);
-}
-
-static void
-isert_cq_tx_callback(struct ib_cq *cq, void *context)
-{
- struct isert_cq_desc *cq_desc = (struct isert_cq_desc *)context;
+ } else {
+ if (wc->status != IB_WC_WR_FLUSH_ERR)
+ isert_err("wr id %llx status %d vend_err %x\n",
+ wc->wr_id, wc->status, wc->vendor_err);
+ else
+ isert_dbg("flush error: wr id %llx\n", wc->wr_id);
- queue_work(isert_comp_wq, &cq_desc->cq_tx_work);
+ if (wc->wr_id != ISER_FASTREG_LI_WRID)
+ isert_cq_comp_err(isert_conn, wc);
+ }
}
static void
-isert_cq_rx_work(struct work_struct *work)
+isert_cq_work(struct work_struct *work)
{
- struct isert_cq_desc *cq_desc = container_of(work,
- struct isert_cq_desc, cq_rx_work);
- struct isert_device *device = cq_desc->device;
- int cq_index = cq_desc->cq_index;
- struct ib_cq *rx_cq = device->dev_rx_cq[cq_index];
- struct isert_conn *isert_conn;
- struct iser_rx_desc *rx_desc;
- struct ib_wc wc;
- unsigned long xfer_len;
+ enum { isert_poll_budget = 65536 };
+ struct isert_comp *comp = container_of(work, struct isert_comp,
+ work);
+ struct ib_wc *const wcs = comp->wcs;
+ int i, n, completed = 0;
- while (ib_poll_cq(rx_cq, 1, &wc) == 1) {
- rx_desc = (struct iser_rx_desc *)(unsigned long)wc.wr_id;
- isert_conn = wc.qp->qp_context;
+ while ((n = ib_poll_cq(comp->cq, ARRAY_SIZE(comp->wcs), wcs)) > 0) {
+ for (i = 0; i < n; i++)
+ isert_handle_wc(&wcs[i]);
- if (wc.status == IB_WC_SUCCESS) {
- xfer_len = (unsigned long)wc.byte_len;
- isert_rx_completion(rx_desc, isert_conn, xfer_len);
- } else {
- pr_debug("RX wc.status != IB_WC_SUCCESS >>>>>>>>>>>>>>\n");
- if (wc.status != IB_WC_WR_FLUSH_ERR) {
- pr_debug("RX wc.status: 0x%08x\n", wc.status);
- pr_debug("RX wc.vendor_err: 0x%08x\n",
- wc.vendor_err);
- }
- isert_conn->post_recv_buf_count--;
- isert_cq_rx_comp_err(isert_conn);
- }
+ completed += n;
+ if (completed >= isert_poll_budget)
+ break;
}
- ib_req_notify_cq(rx_cq, IB_CQ_NEXT_COMP);
+ ib_req_notify_cq(comp->cq, IB_CQ_NEXT_COMP);
}
static void
-isert_cq_rx_callback(struct ib_cq *cq, void *context)
+isert_cq_callback(struct ib_cq *cq, void *context)
{
- struct isert_cq_desc *cq_desc = (struct isert_cq_desc *)context;
+ struct isert_comp *comp = context;
- queue_work(isert_rx_wq, &cq_desc->cq_rx_work);
+ queue_work(isert_comp_wq, &comp->work);
}
static int
@@ -2147,13 +2057,10 @@ isert_post_response(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd)
struct ib_send_wr *wr_failed;
int ret;
- atomic_inc(&isert_conn->post_send_buf_count);
-
ret = ib_post_send(isert_conn->conn_qp, &isert_cmd->tx_desc.send_wr,
&wr_failed);
if (ret) {
- pr_err("ib_post_send failed with %d\n", ret);
- atomic_dec(&isert_conn->post_send_buf_count);
+ isert_err("ib_post_send failed with %d\n", ret);
return ret;
}
return ret;
@@ -2200,9 +2107,9 @@ isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
isert_cmd->tx_desc.num_sge = 2;
}
- isert_init_send_wr(isert_conn, isert_cmd, send_wr, false);
+ isert_init_send_wr(isert_conn, isert_cmd, send_wr);
- pr_debug("Posting SCSI Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
+ isert_dbg("Posting SCSI Response\n");
return isert_post_response(isert_conn, isert_cmd);
}
@@ -2231,8 +2138,16 @@ isert_get_sup_prot_ops(struct iscsi_conn *conn)
struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
struct isert_device *device = isert_conn->conn_device;
- if (device->pi_capable)
- return TARGET_PROT_ALL;
+ if (conn->tpg->tpg_attrib.t10_pi) {
+ if (device->pi_capable) {
+ isert_info("conn %p PI offload enabled\n", isert_conn);
+ isert_conn->pi_support = true;
+ return TARGET_PROT_ALL;
+ }
+ }
+
+ isert_info("conn %p PI offload disabled\n", isert_conn);
+ isert_conn->pi_support = false;
return TARGET_PROT_NORMAL;
}
@@ -2250,9 +2165,9 @@ isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
&isert_cmd->tx_desc.iscsi_header,
nopout_response);
isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
- isert_init_send_wr(isert_conn, isert_cmd, send_wr, false);
+ isert_init_send_wr(isert_conn, isert_cmd, send_wr);
- pr_debug("Posting NOPIN Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
+ isert_dbg("conn %p Posting NOPIN Response\n", isert_conn);
return isert_post_response(isert_conn, isert_cmd);
}
@@ -2268,9 +2183,9 @@ isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
iscsit_build_logout_rsp(cmd, conn, (struct iscsi_logout_rsp *)
&isert_cmd->tx_desc.iscsi_header);
isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
- isert_init_send_wr(isert_conn, isert_cmd, send_wr, false);
+ isert_init_send_wr(isert_conn, isert_cmd, send_wr);
- pr_debug("Posting Logout Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
+ isert_dbg("conn %p Posting Logout Response\n", isert_conn);
return isert_post_response(isert_conn, isert_cmd);
}
@@ -2286,9 +2201,9 @@ isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
iscsit_build_task_mgt_rsp(cmd, conn, (struct iscsi_tm_rsp *)
&isert_cmd->tx_desc.iscsi_header);
isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
- isert_init_send_wr(isert_conn, isert_cmd, send_wr, false);
+ isert_init_send_wr(isert_conn, isert_cmd, send_wr);
- pr_debug("Posting Task Management Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
+ isert_dbg("conn %p Posting Task Management Response\n", isert_conn);
return isert_post_response(isert_conn, isert_cmd);
}
@@ -2318,9 +2233,9 @@ isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
tx_dsg->lkey = isert_conn->conn_mr->lkey;
isert_cmd->tx_desc.num_sge = 2;
- isert_init_send_wr(isert_conn, isert_cmd, send_wr, false);
+ isert_init_send_wr(isert_conn, isert_cmd, send_wr);
- pr_debug("Posting Reject IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
+ isert_dbg("conn %p Posting Reject\n", isert_conn);
return isert_post_response(isert_conn, isert_cmd);
}
@@ -2358,9 +2273,9 @@ isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
tx_dsg->lkey = isert_conn->conn_mr->lkey;
isert_cmd->tx_desc.num_sge = 2;
}
- isert_init_send_wr(isert_conn, isert_cmd, send_wr, false);
+ isert_init_send_wr(isert_conn, isert_cmd, send_wr);
- pr_debug("Posting Text Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
+ isert_dbg("conn %p Text Reject\n", isert_conn);
return isert_post_response(isert_conn, isert_cmd);
}
@@ -2383,30 +2298,31 @@ isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
send_wr->sg_list = ib_sge;
send_wr->num_sge = sg_nents;
- send_wr->wr_id = (unsigned long)&isert_cmd->tx_desc;
+ send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc;
/*
* Perform mapping of TCM scatterlist memory ib_sge dma_addr.
*/
for_each_sg(sg_start, tmp_sg, sg_nents, i) {
- pr_debug("ISER RDMA from SGL dma_addr: 0x%16llx dma_len: %u, page_off: %u\n",
- (unsigned long long)tmp_sg->dma_address,
- tmp_sg->length, page_off);
+ isert_dbg("RDMA from SGL dma_addr: 0x%llx dma_len: %u, "
+ "page_off: %u\n",
+ (unsigned long long)tmp_sg->dma_address,
+ tmp_sg->length, page_off);
ib_sge->addr = ib_sg_dma_address(ib_dev, tmp_sg) + page_off;
ib_sge->length = min_t(u32, data_left,
ib_sg_dma_len(ib_dev, tmp_sg) - page_off);
ib_sge->lkey = isert_conn->conn_mr->lkey;
- pr_debug("RDMA ib_sge: addr: 0x%16llx length: %u lkey: %08x\n",
- ib_sge->addr, ib_sge->length, ib_sge->lkey);
+ isert_dbg("RDMA ib_sge: addr: 0x%llx length: %u lkey: %x\n",
+ ib_sge->addr, ib_sge->length, ib_sge->lkey);
page_off = 0;
data_left -= ib_sge->length;
ib_sge++;
- pr_debug("Incrementing ib_sge pointer to %p\n", ib_sge);
+ isert_dbg("Incrementing ib_sge pointer to %p\n", ib_sge);
}
- pr_debug("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n",
- send_wr->sg_list, send_wr->num_sge);
+ isert_dbg("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n",
+ send_wr->sg_list, send_wr->num_sge);
return sg_nents;
}
@@ -2438,7 +2354,7 @@ isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
ib_sge = kzalloc(sizeof(struct ib_sge) * data->nents, GFP_KERNEL);
if (!ib_sge) {
- pr_warn("Unable to allocate ib_sge\n");
+ isert_warn("Unable to allocate ib_sge\n");
ret = -ENOMEM;
goto unmap_cmd;
}
@@ -2448,7 +2364,7 @@ isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
wr->send_wr = kzalloc(sizeof(struct ib_send_wr) * wr->send_wr_num,
GFP_KERNEL);
if (!wr->send_wr) {
- pr_debug("Unable to allocate wr->send_wr\n");
+ isert_dbg("Unable to allocate wr->send_wr\n");
ret = -ENOMEM;
goto unmap_cmd;
}
@@ -2512,9 +2428,9 @@ isert_map_fr_pagelist(struct ib_device *ib_dev,
chunk_start = start_addr;
end_addr = start_addr + ib_sg_dma_len(ib_dev, tmp_sg);
- pr_debug("SGL[%d] dma_addr: 0x%16llx len: %u\n",
- i, (unsigned long long)tmp_sg->dma_address,
- tmp_sg->length);
+ isert_dbg("SGL[%d] dma_addr: 0x%llx len: %u\n",
+ i, (unsigned long long)tmp_sg->dma_address,
+ tmp_sg->length);
if ((end_addr & ~PAGE_MASK) && i < last_ent) {
new_chunk = 0;
@@ -2525,8 +2441,8 @@ isert_map_fr_pagelist(struct ib_device *ib_dev,
page = chunk_start & PAGE_MASK;
do {
fr_pl[n_pages++] = page;
- pr_debug("Mapped page_list[%d] page_addr: 0x%16llx\n",
- n_pages - 1, page);
+ isert_dbg("Mapped page_list[%d] page_addr: 0x%llx\n",
+ n_pages - 1, page);
page += PAGE_SIZE;
} while (page < end_addr);
}
@@ -2534,6 +2450,21 @@ isert_map_fr_pagelist(struct ib_device *ib_dev,
return n_pages;
}
+static inline void
+isert_inv_rkey(struct ib_send_wr *inv_wr, struct ib_mr *mr)
+{
+ u32 rkey;
+
+ memset(inv_wr, 0, sizeof(*inv_wr));
+ inv_wr->wr_id = ISER_FASTREG_LI_WRID;
+ inv_wr->opcode = IB_WR_LOCAL_INV;
+ inv_wr->ex.invalidate_rkey = mr->rkey;
+
+ /* Bump the key */
+ rkey = ib_inc_rkey(mr->rkey);
+ ib_update_fast_reg_key(mr, rkey);
+}
+
static int
isert_fast_reg_mr(struct isert_conn *isert_conn,
struct fast_reg_descriptor *fr_desc,
@@ -2548,15 +2479,13 @@ isert_fast_reg_mr(struct isert_conn *isert_conn,
struct ib_send_wr *bad_wr, *wr = NULL;
int ret, pagelist_len;
u32 page_off;
- u8 key;
if (mem->dma_nents == 1) {
sge->lkey = isert_conn->conn_mr->lkey;
sge->addr = ib_sg_dma_address(ib_dev, &mem->sg[0]);
sge->length = ib_sg_dma_len(ib_dev, &mem->sg[0]);
- pr_debug("%s:%d sge: addr: 0x%llx length: %u lkey: %x\n",
- __func__, __LINE__, sge->addr, sge->length,
- sge->lkey);
+ isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n",
+ sge->addr, sge->length, sge->lkey);
return 0;
}
@@ -2572,21 +2501,15 @@ isert_fast_reg_mr(struct isert_conn *isert_conn,
page_off = mem->offset % PAGE_SIZE;
- pr_debug("Use fr_desc %p sg_nents %d offset %u\n",
- fr_desc, mem->nents, mem->offset);
+ isert_dbg("Use fr_desc %p sg_nents %d offset %u\n",
+ fr_desc, mem->nents, mem->offset);
pagelist_len = isert_map_fr_pagelist(ib_dev, mem->sg, mem->nents,
&frpl->page_list[0]);
- if (!(fr_desc->ind & ISERT_DATA_KEY_VALID)) {
- memset(&inv_wr, 0, sizeof(inv_wr));
- inv_wr.wr_id = ISER_FASTREG_LI_WRID;
- inv_wr.opcode = IB_WR_LOCAL_INV;
- inv_wr.ex.invalidate_rkey = mr->rkey;
+ if (!(fr_desc->ind & ind)) {
+ isert_inv_rkey(&inv_wr, mr);
wr = &inv_wr;
- /* Bump the key */
- key = (u8)(mr->rkey & 0x000000FF);
- ib_update_fast_reg_key(mr, ++key);
}
/* Prepare FASTREG WR */
@@ -2608,7 +2531,7 @@ isert_fast_reg_mr(struct isert_conn *isert_conn,
ret = ib_post_send(isert_conn->conn_qp, wr, &bad_wr);
if (ret) {
- pr_err("fast registration failed, ret:%d\n", ret);
+ isert_err("fast registration failed, ret:%d\n", ret);
return ret;
}
fr_desc->ind &= ~ind;
@@ -2617,9 +2540,8 @@ isert_fast_reg_mr(struct isert_conn *isert_conn,
sge->addr = frpl->page_list[0] + page_off;
sge->length = mem->len;
- pr_debug("%s:%d sge: addr: 0x%llx length: %u lkey: %x\n",
- __func__, __LINE__, sge->addr, sge->length,
- sge->lkey);
+ isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n",
+ sge->addr, sge->length, sge->lkey);
return ret;
}
@@ -2665,7 +2587,7 @@ isert_set_sig_attrs(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs)
isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem);
break;
default:
- pr_err("Unsupported PI operation %d\n", se_cmd->prot_op);
+ isert_err("Unsupported PI operation %d\n", se_cmd->prot_op);
return -EINVAL;
}
@@ -2681,17 +2603,16 @@ isert_set_prot_checks(u8 prot_checks)
}
static int
-isert_reg_sig_mr(struct isert_conn *isert_conn, struct se_cmd *se_cmd,
- struct fast_reg_descriptor *fr_desc,
- struct ib_sge *data_sge, struct ib_sge *prot_sge,
- struct ib_sge *sig_sge)
+isert_reg_sig_mr(struct isert_conn *isert_conn,
+ struct se_cmd *se_cmd,
+ struct isert_rdma_wr *rdma_wr,
+ struct fast_reg_descriptor *fr_desc)
{
struct ib_send_wr sig_wr, inv_wr;
struct ib_send_wr *bad_wr, *wr = NULL;
struct pi_context *pi_ctx = fr_desc->pi_ctx;
struct ib_sig_attrs sig_attrs;
int ret;
- u32 key;
memset(&sig_attrs, 0, sizeof(sig_attrs));
ret = isert_set_sig_attrs(se_cmd, &sig_attrs);
@@ -2701,26 +2622,20 @@ isert_reg_sig_mr(struct isert_conn *isert_conn, struct se_cmd *se_cmd,
sig_attrs.check_mask = isert_set_prot_checks(se_cmd->prot_checks);
if (!(fr_desc->ind & ISERT_SIG_KEY_VALID)) {
- memset(&inv_wr, 0, sizeof(inv_wr));
- inv_wr.opcode = IB_WR_LOCAL_INV;
- inv_wr.wr_id = ISER_FASTREG_LI_WRID;
- inv_wr.ex.invalidate_rkey = pi_ctx->sig_mr->rkey;
+ isert_inv_rkey(&inv_wr, pi_ctx->sig_mr);
wr = &inv_wr;
- /* Bump the key */
- key = (u8)(pi_ctx->sig_mr->rkey & 0x000000FF);
- ib_update_fast_reg_key(pi_ctx->sig_mr, ++key);
}
memset(&sig_wr, 0, sizeof(sig_wr));
sig_wr.opcode = IB_WR_REG_SIG_MR;
sig_wr.wr_id = ISER_FASTREG_LI_WRID;
- sig_wr.sg_list = data_sge;
+ sig_wr.sg_list = &rdma_wr->ib_sg[DATA];
sig_wr.num_sge = 1;
sig_wr.wr.sig_handover.access_flags = IB_ACCESS_LOCAL_WRITE;
sig_wr.wr.sig_handover.sig_attrs = &sig_attrs;
sig_wr.wr.sig_handover.sig_mr = pi_ctx->sig_mr;
if (se_cmd->t_prot_sg)
- sig_wr.wr.sig_handover.prot = prot_sge;
+ sig_wr.wr.sig_handover.prot = &rdma_wr->ib_sg[PROT];
if (!wr)
wr = &sig_wr;
@@ -2729,39 +2644,98 @@ isert_reg_sig_mr(struct isert_conn *isert_conn, struct se_cmd *se_cmd,
ret = ib_post_send(isert_conn->conn_qp, wr, &bad_wr);
if (ret) {
- pr_err("fast registration failed, ret:%d\n", ret);
+ isert_err("fast registration failed, ret:%d\n", ret);
goto err;
}
fr_desc->ind &= ~ISERT_SIG_KEY_VALID;
- sig_sge->lkey = pi_ctx->sig_mr->lkey;
- sig_sge->addr = 0;
- sig_sge->length = se_cmd->data_length;
+ rdma_wr->ib_sg[SIG].lkey = pi_ctx->sig_mr->lkey;
+ rdma_wr->ib_sg[SIG].addr = 0;
+ rdma_wr->ib_sg[SIG].length = se_cmd->data_length;
if (se_cmd->prot_op != TARGET_PROT_DIN_STRIP &&
se_cmd->prot_op != TARGET_PROT_DOUT_INSERT)
/*
* We have protection guards on the wire
* so we need to set a larget transfer
*/
- sig_sge->length += se_cmd->prot_length;
+ rdma_wr->ib_sg[SIG].length += se_cmd->prot_length;
- pr_debug("sig_sge: addr: 0x%llx length: %u lkey: %x\n",
- sig_sge->addr, sig_sge->length,
- sig_sge->lkey);
+ isert_dbg("sig_sge: addr: 0x%llx length: %u lkey: %x\n",
+ rdma_wr->ib_sg[SIG].addr, rdma_wr->ib_sg[SIG].length,
+ rdma_wr->ib_sg[SIG].lkey);
err:
return ret;
}
static int
+isert_handle_prot_cmd(struct isert_conn *isert_conn,
+ struct isert_cmd *isert_cmd,
+ struct isert_rdma_wr *wr)
+{
+ struct isert_device *device = isert_conn->conn_device;
+ struct se_cmd *se_cmd = &isert_cmd->iscsi_cmd->se_cmd;
+ int ret;
+
+ if (!wr->fr_desc->pi_ctx) {
+ ret = isert_create_pi_ctx(wr->fr_desc,
+ device->ib_device,
+ isert_conn->conn_pd);
+ if (ret) {
+ isert_err("conn %p failed to allocate pi_ctx\n",
+ isert_conn);
+ return ret;
+ }
+ }
+
+ if (se_cmd->t_prot_sg) {
+ ret = isert_map_data_buf(isert_conn, isert_cmd,
+ se_cmd->t_prot_sg,
+ se_cmd->t_prot_nents,
+ se_cmd->prot_length,
+ 0, wr->iser_ib_op, &wr->prot);
+ if (ret) {
+ isert_err("conn %p failed to map protection buffer\n",
+ isert_conn);
+ return ret;
+ }
+
+ memset(&wr->ib_sg[PROT], 0, sizeof(wr->ib_sg[PROT]));
+ ret = isert_fast_reg_mr(isert_conn, wr->fr_desc, &wr->prot,
+ ISERT_PROT_KEY_VALID, &wr->ib_sg[PROT]);
+ if (ret) {
+ isert_err("conn %p failed to fast reg mr\n",
+ isert_conn);
+ goto unmap_prot_cmd;
+ }
+ }
+
+ ret = isert_reg_sig_mr(isert_conn, se_cmd, wr, wr->fr_desc);
+ if (ret) {
+ isert_err("conn %p failed to fast reg mr\n",
+ isert_conn);
+ goto unmap_prot_cmd;
+ }
+ wr->fr_desc->ind |= ISERT_PROTECTED;
+
+ return 0;
+
+unmap_prot_cmd:
+ if (se_cmd->t_prot_sg)
+ isert_unmap_data_buf(isert_conn, &wr->prot);
+
+ return ret;
+}
+
+static int
isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
struct isert_rdma_wr *wr)
{
struct se_cmd *se_cmd = &cmd->se_cmd;
struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
struct isert_conn *isert_conn = conn->context;
- struct ib_sge data_sge;
- struct ib_send_wr *send_wr;
struct fast_reg_descriptor *fr_desc = NULL;
+ struct ib_send_wr *send_wr;
+ struct ib_sge *ib_sg;
u32 offset;
int ret = 0;
unsigned long flags;
@@ -2775,8 +2749,7 @@ isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
if (ret)
return ret;
- if (wr->data.dma_nents != 1 ||
- se_cmd->prot_op != TARGET_PROT_NORMAL) {
+ if (wr->data.dma_nents != 1 || isert_prot_cmd(isert_conn, se_cmd)) {
spin_lock_irqsave(&isert_conn->conn_lock, flags);
fr_desc = list_first_entry(&isert_conn->conn_fr_pool,
struct fast_reg_descriptor, list);
@@ -2786,38 +2759,21 @@ isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
}
ret = isert_fast_reg_mr(isert_conn, fr_desc, &wr->data,
- ISERT_DATA_KEY_VALID, &data_sge);
+ ISERT_DATA_KEY_VALID, &wr->ib_sg[DATA]);
if (ret)
goto unmap_cmd;
- if (se_cmd->prot_op != TARGET_PROT_NORMAL) {
- struct ib_sge prot_sge, sig_sge;
-
- if (se_cmd->t_prot_sg) {
- ret = isert_map_data_buf(isert_conn, isert_cmd,
- se_cmd->t_prot_sg,
- se_cmd->t_prot_nents,
- se_cmd->prot_length,
- 0, wr->iser_ib_op, &wr->prot);
- if (ret)
- goto unmap_cmd;
-
- ret = isert_fast_reg_mr(isert_conn, fr_desc, &wr->prot,
- ISERT_PROT_KEY_VALID, &prot_sge);
- if (ret)
- goto unmap_prot_cmd;
- }
-
- ret = isert_reg_sig_mr(isert_conn, se_cmd, fr_desc,
- &data_sge, &prot_sge, &sig_sge);
+ if (isert_prot_cmd(isert_conn, se_cmd)) {
+ ret = isert_handle_prot_cmd(isert_conn, isert_cmd, wr);
if (ret)
- goto unmap_prot_cmd;
+ goto unmap_cmd;
- fr_desc->ind |= ISERT_PROTECTED;
- memcpy(&wr->s_ib_sge, &sig_sge, sizeof(sig_sge));
- } else
- memcpy(&wr->s_ib_sge, &data_sge, sizeof(data_sge));
+ ib_sg = &wr->ib_sg[SIG];
+ } else {
+ ib_sg = &wr->ib_sg[DATA];
+ }
+ memcpy(&wr->s_ib_sge, ib_sg, sizeof(*ib_sg));
wr->ib_sge = &wr->s_ib_sge;
wr->send_wr_num = 1;
memset(&wr->s_send_wr, 0, sizeof(*send_wr));
@@ -2827,12 +2783,12 @@ isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
send_wr = &isert_cmd->rdma_wr.s_send_wr;
send_wr->sg_list = &wr->s_ib_sge;
send_wr->num_sge = 1;
- send_wr->wr_id = (unsigned long)&isert_cmd->tx_desc;
+ send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc;
if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) {
send_wr->opcode = IB_WR_RDMA_WRITE;
send_wr->wr.rdma.remote_addr = isert_cmd->read_va;
send_wr->wr.rdma.rkey = isert_cmd->read_stag;
- send_wr->send_flags = se_cmd->prot_op == TARGET_PROT_NORMAL ?
+ send_wr->send_flags = !isert_prot_cmd(isert_conn, se_cmd) ?
0 : IB_SEND_SIGNALED;
} else {
send_wr->opcode = IB_WR_RDMA_READ;
@@ -2842,9 +2798,7 @@ isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
}
return 0;
-unmap_prot_cmd:
- if (se_cmd->t_prot_sg)
- isert_unmap_data_buf(isert_conn, &wr->prot);
+
unmap_cmd:
if (fr_desc) {
spin_lock_irqsave(&isert_conn->conn_lock, flags);
@@ -2867,16 +2821,17 @@ isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
struct ib_send_wr *wr_failed;
int rc;
- pr_debug("Cmd: %p RDMA_WRITE data_length: %u\n",
+ isert_dbg("Cmd: %p RDMA_WRITE data_length: %u\n",
isert_cmd, se_cmd->data_length);
+
wr->iser_ib_op = ISER_IB_RDMA_WRITE;
rc = device->reg_rdma_mem(conn, cmd, wr);
if (rc) {
- pr_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd);
+ isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd);
return rc;
}
- if (se_cmd->prot_op == TARGET_PROT_NORMAL) {
+ if (!isert_prot_cmd(isert_conn, se_cmd)) {
/*
* Build isert_conn->tx_desc for iSCSI response PDU and attach
*/
@@ -2886,24 +2841,20 @@ isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
&isert_cmd->tx_desc.iscsi_header);
isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
isert_init_send_wr(isert_conn, isert_cmd,
- &isert_cmd->tx_desc.send_wr, false);
+ &isert_cmd->tx_desc.send_wr);
isert_cmd->rdma_wr.s_send_wr.next = &isert_cmd->tx_desc.send_wr;
wr->send_wr_num += 1;
}
- atomic_add(wr->send_wr_num, &isert_conn->post_send_buf_count);
-
rc = ib_post_send(isert_conn->conn_qp, wr->send_wr, &wr_failed);
- if (rc) {
- pr_warn("ib_post_send() failed for IB_WR_RDMA_WRITE\n");
- atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count);
- }
+ if (rc)
+ isert_warn("ib_post_send() failed for IB_WR_RDMA_WRITE\n");
- if (se_cmd->prot_op == TARGET_PROT_NORMAL)
- pr_debug("Cmd: %p posted RDMA_WRITE + Response for iSER Data "
+ if (!isert_prot_cmd(isert_conn, se_cmd))
+ isert_dbg("Cmd: %p posted RDMA_WRITE + Response for iSER Data "
"READ\n", isert_cmd);
else
- pr_debug("Cmd: %p posted RDMA_WRITE for iSER Data READ\n",
+ isert_dbg("Cmd: %p posted RDMA_WRITE for iSER Data READ\n",
isert_cmd);
return 1;
@@ -2920,23 +2871,20 @@ isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery)
struct ib_send_wr *wr_failed;
int rc;
- pr_debug("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n",
+ isert_dbg("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n",
isert_cmd, se_cmd->data_length, cmd->write_data_done);
wr->iser_ib_op = ISER_IB_RDMA_READ;
rc = device->reg_rdma_mem(conn, cmd, wr);
if (rc) {
- pr_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd);
+ isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd);
return rc;
}
- atomic_add(wr->send_wr_num, &isert_conn->post_send_buf_count);
-
rc = ib_post_send(isert_conn->conn_qp, wr->send_wr, &wr_failed);
- if (rc) {
- pr_warn("ib_post_send() failed for IB_WR_RDMA_READ\n");
- atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count);
- }
- pr_debug("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n",
+ if (rc)
+ isert_warn("ib_post_send() failed for IB_WR_RDMA_READ\n");
+
+ isert_dbg("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n",
isert_cmd);
return 0;
@@ -2952,7 +2900,7 @@ isert_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state)
ret = isert_put_nopin(cmd, conn, false);
break;
default:
- pr_err("Unknown immediate state: 0x%02x\n", state);
+ isert_err("Unknown immediate state: 0x%02x\n", state);
ret = -EINVAL;
break;
}
@@ -2963,15 +2911,14 @@ isert_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state)
static int
isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state)
{
+ struct isert_conn *isert_conn = conn->context;
int ret;
switch (state) {
case ISTATE_SEND_LOGOUTRSP:
ret = isert_put_logout_rsp(cmd, conn);
- if (!ret) {
- pr_debug("Returning iSER Logout -EAGAIN\n");
- ret = -EAGAIN;
- }
+ if (!ret)
+ isert_conn->logout_posted = true;
break;
case ISTATE_SEND_NOPIN:
ret = isert_put_nopin(cmd, conn, true);
@@ -2993,7 +2940,7 @@ isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state)
ret = isert_put_response(conn, cmd);
break;
default:
- pr_err("Unknown response state: 0x%02x\n", state);
+ isert_err("Unknown response state: 0x%02x\n", state);
ret = -EINVAL;
break;
}
@@ -3001,27 +2948,64 @@ isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state)
return ret;
}
+struct rdma_cm_id *
+isert_setup_id(struct isert_np *isert_np)
+{
+ struct iscsi_np *np = isert_np->np;
+ struct rdma_cm_id *id;
+ struct sockaddr *sa;
+ int ret;
+
+ sa = (struct sockaddr *)&np->np_sockaddr;
+ isert_dbg("ksockaddr: %p, sa: %p\n", &np->np_sockaddr, sa);
+
+ id = rdma_create_id(isert_cma_handler, isert_np,
+ RDMA_PS_TCP, IB_QPT_RC);
+ if (IS_ERR(id)) {
+ isert_err("rdma_create_id() failed: %ld\n", PTR_ERR(id));
+ ret = PTR_ERR(id);
+ goto out;
+ }
+ isert_dbg("id %p context %p\n", id, id->context);
+
+ ret = rdma_bind_addr(id, sa);
+ if (ret) {
+ isert_err("rdma_bind_addr() failed: %d\n", ret);
+ goto out_id;
+ }
+
+ ret = rdma_listen(id, ISERT_RDMA_LISTEN_BACKLOG);
+ if (ret) {
+ isert_err("rdma_listen() failed: %d\n", ret);
+ goto out_id;
+ }
+
+ return id;
+out_id:
+ rdma_destroy_id(id);
+out:
+ return ERR_PTR(ret);
+}
+
static int
isert_setup_np(struct iscsi_np *np,
struct __kernel_sockaddr_storage *ksockaddr)
{
struct isert_np *isert_np;
struct rdma_cm_id *isert_lid;
- struct sockaddr *sa;
int ret;
isert_np = kzalloc(sizeof(struct isert_np), GFP_KERNEL);
if (!isert_np) {
- pr_err("Unable to allocate struct isert_np\n");
+ isert_err("Unable to allocate struct isert_np\n");
return -ENOMEM;
}
sema_init(&isert_np->np_sem, 0);
mutex_init(&isert_np->np_accept_mutex);
INIT_LIST_HEAD(&isert_np->np_accept_list);
init_completion(&isert_np->np_login_comp);
+ isert_np->np = np;
- sa = (struct sockaddr *)ksockaddr;
- pr_debug("ksockaddr: %p, sa: %p\n", ksockaddr, sa);
/*
* Setup the np->np_sockaddr from the passed sockaddr setup
* in iscsi_target_configfs.c code..
@@ -3029,37 +3013,20 @@ isert_setup_np(struct iscsi_np *np,
memcpy(&np->np_sockaddr, ksockaddr,
sizeof(struct __kernel_sockaddr_storage));
- isert_lid = rdma_create_id(isert_cma_handler, np, RDMA_PS_TCP,
- IB_QPT_RC);
+ isert_lid = isert_setup_id(isert_np);
if (IS_ERR(isert_lid)) {
- pr_err("rdma_create_id() for isert_listen_handler failed: %ld\n",
- PTR_ERR(isert_lid));
ret = PTR_ERR(isert_lid);
goto out;
}
- ret = rdma_bind_addr(isert_lid, sa);
- if (ret) {
- pr_err("rdma_bind_addr() for isert_lid failed: %d\n", ret);
- goto out_lid;
- }
-
- ret = rdma_listen(isert_lid, ISERT_RDMA_LISTEN_BACKLOG);
- if (ret) {
- pr_err("rdma_listen() for isert_lid failed: %d\n", ret);
- goto out_lid;
- }
-
isert_np->np_cm_id = isert_lid;
np->np_context = isert_np;
- pr_debug("Setup isert_lid->context: %p\n", isert_lid->context);
return 0;
-out_lid:
- rdma_destroy_id(isert_lid);
out:
kfree(isert_np);
+
return ret;
}
@@ -3075,16 +3042,12 @@ isert_rdma_accept(struct isert_conn *isert_conn)
cp.retry_count = 7;
cp.rnr_retry_count = 7;
- pr_debug("Before rdma_accept >>>>>>>>>>>>>>>>>>>>.\n");
-
ret = rdma_accept(cm_id, &cp);
if (ret) {
- pr_err("rdma_accept() failed with: %d\n", ret);
+ isert_err("rdma_accept() failed with: %d\n", ret);
return ret;
}
- pr_debug("After rdma_accept >>>>>>>>>>>>>>>>>>>>>.\n");
-
return 0;
}
@@ -3094,7 +3057,15 @@ isert_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login)
struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
int ret;
- pr_debug("isert_get_login_rx before conn_login_comp conn: %p\n", conn);
+ isert_info("before login_req comp conn: %p\n", isert_conn);
+ ret = wait_for_completion_interruptible(&isert_conn->login_req_comp);
+ if (ret) {
+ isert_err("isert_conn %p interrupted before got login req\n",
+ isert_conn);
+ return ret;
+ }
+ reinit_completion(&isert_conn->login_req_comp);
+
/*
* For login requests after the first PDU, isert_rx_login_req() will
* kick schedule_delayed_work(&conn->login_work) as the packet is
@@ -3104,11 +3075,15 @@ isert_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login)
if (!login->first_request)
return 0;
+ isert_rx_login_req(isert_conn);
+
+ isert_info("before conn_login_comp conn: %p\n", conn);
ret = wait_for_completion_interruptible(&isert_conn->conn_login_comp);
if (ret)
return ret;
- pr_debug("isert_get_login_rx processing login->req: %p\n", login->req);
+ isert_info("processing login->req: %p\n", login->req);
+
return 0;
}
@@ -3161,7 +3136,7 @@ accept_wait:
spin_lock_bh(&np->np_thread_lock);
if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) {
spin_unlock_bh(&np->np_thread_lock);
- pr_debug("np_thread_state %d for isert_accept_np\n",
+ isert_dbg("np_thread_state %d for isert_accept_np\n",
np->np_thread_state);
/**
* No point in stalling here when np_thread
@@ -3186,17 +3161,10 @@ accept_wait:
isert_conn->conn = conn;
max_accept = 0;
- ret = isert_rdma_post_recvl(isert_conn);
- if (ret)
- return ret;
-
- ret = isert_rdma_accept(isert_conn);
- if (ret)
- return ret;
-
isert_set_conn_info(np, conn, isert_conn);
- pr_debug("Processing isert_accept_np: isert_conn: %p\n", isert_conn);
+ isert_dbg("Processing isert_conn: %p\n", isert_conn);
+
return 0;
}
@@ -3204,25 +3172,103 @@ static void
isert_free_np(struct iscsi_np *np)
{
struct isert_np *isert_np = (struct isert_np *)np->np_context;
+ struct isert_conn *isert_conn, *n;
if (isert_np->np_cm_id)
rdma_destroy_id(isert_np->np_cm_id);
+ /*
+ * FIXME: At this point we don't have a good way to insure
+ * that at this point we don't have hanging connections that
+ * completed RDMA establishment but didn't start iscsi login
+ * process. So work-around this by cleaning up what ever piled
+ * up in np_accept_list.
+ */
+ mutex_lock(&isert_np->np_accept_mutex);
+ if (!list_empty(&isert_np->np_accept_list)) {
+ isert_info("Still have isert connections, cleaning up...\n");
+ list_for_each_entry_safe(isert_conn, n,
+ &isert_np->np_accept_list,
+ conn_accept_node) {
+ isert_info("cleaning isert_conn %p state (%d)\n",
+ isert_conn, isert_conn->state);
+ isert_connect_release(isert_conn);
+ }
+ }
+ mutex_unlock(&isert_np->np_accept_mutex);
+
np->np_context = NULL;
kfree(isert_np);
}
+static void isert_release_work(struct work_struct *work)
+{
+ struct isert_conn *isert_conn = container_of(work,
+ struct isert_conn,
+ release_work);
+
+ isert_info("Starting release conn %p\n", isert_conn);
+
+ wait_for_completion(&isert_conn->conn_wait);
+
+ mutex_lock(&isert_conn->conn_mutex);
+ isert_conn->state = ISER_CONN_DOWN;
+ mutex_unlock(&isert_conn->conn_mutex);
+
+ isert_info("Destroying conn %p\n", isert_conn);
+ isert_put_conn(isert_conn);
+}
+
+static void
+isert_wait4logout(struct isert_conn *isert_conn)
+{
+ struct iscsi_conn *conn = isert_conn->conn;
+
+ isert_info("conn %p\n", isert_conn);
+
+ if (isert_conn->logout_posted) {
+ isert_info("conn %p wait for conn_logout_comp\n", isert_conn);
+ wait_for_completion_timeout(&conn->conn_logout_comp,
+ SECONDS_FOR_LOGOUT_COMP * HZ);
+ }
+}
+
+static void
+isert_wait4cmds(struct iscsi_conn *conn)
+{
+ isert_info("iscsi_conn %p\n", conn);
+
+ if (conn->sess) {
+ target_sess_cmd_list_set_waiting(conn->sess->se_sess);
+ target_wait_for_sess_cmds(conn->sess->se_sess);
+ }
+}
+
+static void
+isert_wait4flush(struct isert_conn *isert_conn)
+{
+ struct ib_recv_wr *bad_wr;
+
+ isert_info("conn %p\n", isert_conn);
+
+ init_completion(&isert_conn->conn_wait_comp_err);
+ isert_conn->beacon.wr_id = ISER_BEACON_WRID;
+ /* post an indication that all flush errors were consumed */
+ if (ib_post_recv(isert_conn->conn_qp, &isert_conn->beacon, &bad_wr)) {
+ isert_err("conn %p failed to post beacon", isert_conn);
+ return;
+ }
+
+ wait_for_completion(&isert_conn->conn_wait_comp_err);
+}
+
static void isert_wait_conn(struct iscsi_conn *conn)
{
struct isert_conn *isert_conn = conn->context;
- pr_debug("isert_wait_conn: Starting \n");
+ isert_info("Starting conn %p\n", isert_conn);
mutex_lock(&isert_conn->conn_mutex);
- if (isert_conn->conn_cm_id && !isert_conn->disconnect) {
- pr_debug("Calling rdma_disconnect from isert_wait_conn\n");
- rdma_disconnect(isert_conn->conn_cm_id);
- }
/*
* Only wait for conn_wait_comp_err if the isert_conn made it
* into full feature phase..
@@ -3231,14 +3277,15 @@ static void isert_wait_conn(struct iscsi_conn *conn)
mutex_unlock(&isert_conn->conn_mutex);
return;
}
- if (isert_conn->state == ISER_CONN_UP)
- isert_conn->state = ISER_CONN_TERMINATING;
+ isert_conn_terminate(isert_conn);
mutex_unlock(&isert_conn->conn_mutex);
- wait_for_completion(&isert_conn->conn_wait_comp_err);
+ isert_wait4cmds(conn);
+ isert_wait4flush(isert_conn);
+ isert_wait4logout(isert_conn);
- wait_for_completion(&isert_conn->conn_wait);
- isert_put_conn(isert_conn);
+ INIT_WORK(&isert_conn->release_work, isert_release_work);
+ queue_work(isert_release_wq, &isert_conn->release_work);
}
static void isert_free_conn(struct iscsi_conn *conn)
@@ -3273,35 +3320,39 @@ static int __init isert_init(void)
{
int ret;
- isert_rx_wq = alloc_workqueue("isert_rx_wq", 0, 0);
- if (!isert_rx_wq) {
- pr_err("Unable to allocate isert_rx_wq\n");
+ isert_comp_wq = alloc_workqueue("isert_comp_wq", 0, 0);
+ if (!isert_comp_wq) {
+ isert_err("Unable to allocate isert_comp_wq\n");
+ ret = -ENOMEM;
return -ENOMEM;
}
- isert_comp_wq = alloc_workqueue("isert_comp_wq", 0, 0);
- if (!isert_comp_wq) {
- pr_err("Unable to allocate isert_comp_wq\n");
+ isert_release_wq = alloc_workqueue("isert_release_wq", WQ_UNBOUND,
+ WQ_UNBOUND_MAX_ACTIVE);
+ if (!isert_release_wq) {
+ isert_err("Unable to allocate isert_release_wq\n");
ret = -ENOMEM;
- goto destroy_rx_wq;
+ goto destroy_comp_wq;
}
iscsit_register_transport(&iser_target_transport);
- pr_debug("iSER_TARGET[0] - Loaded iser_target_transport\n");
+ isert_info("iSER_TARGET[0] - Loaded iser_target_transport\n");
+
return 0;
-destroy_rx_wq:
- destroy_workqueue(isert_rx_wq);
+destroy_comp_wq:
+ destroy_workqueue(isert_comp_wq);
+
return ret;
}
static void __exit isert_exit(void)
{
flush_scheduled_work();
+ destroy_workqueue(isert_release_wq);
destroy_workqueue(isert_comp_wq);
- destroy_workqueue(isert_rx_wq);
iscsit_unregister_transport(&iser_target_transport);
- pr_debug("iSER_TARGET[0] - Released iser_target_transport\n");
+ isert_info("iSER_TARGET[0] - Released iser_target_transport\n");
}
MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure");
diff --git a/drivers/infiniband/ulp/isert/ib_isert.h b/drivers/infiniband/ulp/isert/ib_isert.h
index 04f51f7bf614..8dc8415d152d 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.h
+++ b/drivers/infiniband/ulp/isert/ib_isert.h
@@ -4,9 +4,37 @@
#include <rdma/ib_verbs.h>
#include <rdma/rdma_cm.h>
+#define DRV_NAME "isert"
+#define PFX DRV_NAME ": "
+
+#define isert_dbg(fmt, arg...) \
+ do { \
+ if (unlikely(isert_debug_level > 2)) \
+ printk(KERN_DEBUG PFX "%s: " fmt,\
+ __func__ , ## arg); \
+ } while (0)
+
+#define isert_warn(fmt, arg...) \
+ do { \
+ if (unlikely(isert_debug_level > 0)) \
+ pr_warn(PFX "%s: " fmt, \
+ __func__ , ## arg); \
+ } while (0)
+
+#define isert_info(fmt, arg...) \
+ do { \
+ if (unlikely(isert_debug_level > 1)) \
+ pr_info(PFX "%s: " fmt, \
+ __func__ , ## arg); \
+ } while (0)
+
+#define isert_err(fmt, arg...) \
+ pr_err(PFX "%s: " fmt, __func__ , ## arg)
+
#define ISERT_RDMA_LISTEN_BACKLOG 10
#define ISCSI_ISER_SG_TABLESIZE 256
#define ISER_FASTREG_LI_WRID 0xffffffffffffffffULL
+#define ISER_BEACON_WRID 0xfffffffffffffffeULL
enum isert_desc_type {
ISCSI_TX_CONTROL,
@@ -23,6 +51,7 @@ enum iser_ib_op_code {
enum iser_conn_state {
ISER_CONN_INIT,
ISER_CONN_UP,
+ ISER_CONN_FULL_FEATURE,
ISER_CONN_TERMINATING,
ISER_CONN_DOWN,
};
@@ -44,9 +73,6 @@ struct iser_tx_desc {
struct ib_sge tx_sg[2];
int num_sge;
struct isert_cmd *isert_cmd;
- struct llist_node *comp_llnode_batch;
- struct llist_node comp_llnode;
- bool llnode_active;
struct ib_send_wr send_wr;
} __packed;
@@ -81,6 +107,12 @@ struct isert_data_buf {
enum dma_data_direction dma_dir;
};
+enum {
+ DATA = 0,
+ PROT = 1,
+ SIG = 2,
+};
+
struct isert_rdma_wr {
struct list_head wr_list;
struct isert_cmd *isert_cmd;
@@ -90,6 +122,7 @@ struct isert_rdma_wr {
int send_wr_num;
struct ib_send_wr *send_wr;
struct ib_send_wr s_send_wr;
+ struct ib_sge ib_sg[3];
struct isert_data_buf data;
struct isert_data_buf prot;
struct fast_reg_descriptor *fr_desc;
@@ -117,14 +150,15 @@ struct isert_device;
struct isert_conn {
enum iser_conn_state state;
int post_recv_buf_count;
- atomic_t post_send_buf_count;
u32 responder_resources;
u32 initiator_depth;
+ bool pi_support;
u32 max_sge;
char *login_buf;
char *login_req_buf;
char *login_rsp_buf;
u64 login_req_dma;
+ int login_req_len;
u64 login_rsp_dma;
unsigned int conn_rx_desc_head;
struct iser_rx_desc *conn_rx_descs;
@@ -132,13 +166,13 @@ struct isert_conn {
struct iscsi_conn *conn;
struct list_head conn_accept_node;
struct completion conn_login_comp;
+ struct completion login_req_comp;
struct iser_tx_desc conn_login_tx_desc;
struct rdma_cm_id *conn_cm_id;
struct ib_pd *conn_pd;
struct ib_mr *conn_mr;
struct ib_qp *conn_qp;
struct isert_device *conn_device;
- struct work_struct conn_logout_work;
struct mutex conn_mutex;
struct completion conn_wait;
struct completion conn_wait_comp_err;
@@ -147,31 +181,38 @@ struct isert_conn {
int conn_fr_pool_size;
/* lock to protect fastreg pool */
spinlock_t conn_lock;
-#define ISERT_COMP_BATCH_COUNT 8
- int conn_comp_batch;
- struct llist_head conn_comp_llist;
- bool disconnect;
+ struct work_struct release_work;
+ struct ib_recv_wr beacon;
+ bool logout_posted;
};
#define ISERT_MAX_CQ 64
-struct isert_cq_desc {
- struct isert_device *device;
- int cq_index;
- struct work_struct cq_rx_work;
- struct work_struct cq_tx_work;
+/**
+ * struct isert_comp - iSER completion context
+ *
+ * @device: pointer to device handle
+ * @cq: completion queue
+ * @wcs: work completion array
+ * @active_qps: Number of active QPs attached
+ * to completion context
+ * @work: completion work handle
+ */
+struct isert_comp {
+ struct isert_device *device;
+ struct ib_cq *cq;
+ struct ib_wc wcs[16];
+ int active_qps;
+ struct work_struct work;
};
struct isert_device {
int use_fastreg;
bool pi_capable;
- int cqs_used;
int refcount;
- int cq_active_qps[ISERT_MAX_CQ];
struct ib_device *ib_device;
- struct ib_cq *dev_rx_cq[ISERT_MAX_CQ];
- struct ib_cq *dev_tx_cq[ISERT_MAX_CQ];
- struct isert_cq_desc *cq_desc;
+ struct isert_comp *comps;
+ int comps_used;
struct list_head dev_node;
struct ib_device_attr dev_attr;
int (*reg_rdma_mem)(struct iscsi_conn *conn,
@@ -182,6 +223,7 @@ struct isert_device {
};
struct isert_np {
+ struct iscsi_np *np;
struct semaphore np_sem;
struct rdma_cm_id *np_cm_id;
struct mutex np_accept_mutex;
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 73e58d22e325..f8ec32298906 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -609,6 +609,7 @@ static int __init iscsi_target_init_module(void)
return ret;
r2t_out:
+ iscsit_unregister_transport(&iscsi_target_transport);
kmem_cache_destroy(lio_r2t_cache);
ooo_out:
kmem_cache_destroy(lio_ooo_cache);
diff --git a/drivers/target/iscsi/iscsi_target_core.h b/drivers/target/iscsi/iscsi_target_core.h
index 302eb3b78715..09a522bae222 100644
--- a/drivers/target/iscsi/iscsi_target_core.h
+++ b/drivers/target/iscsi/iscsi_target_core.h
@@ -790,7 +790,6 @@ struct iscsi_np {
void *np_context;
struct iscsit_transport *np_transport;
struct list_head np_list;
- struct iscsi_tpg_np *tpg_np;
} ____cacheline_aligned;
struct iscsi_tpg_np {
diff --git a/drivers/target/iscsi/iscsi_target_login.c b/drivers/target/iscsi/iscsi_target_login.c
index 480f2e0ecc11..713c0c1877ab 100644
--- a/drivers/target/iscsi/iscsi_target_login.c
+++ b/drivers/target/iscsi/iscsi_target_login.c
@@ -281,7 +281,6 @@ static int iscsi_login_zero_tsih_s1(
{
struct iscsi_session *sess = NULL;
struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
- enum target_prot_op sup_pro_ops;
int ret;
sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL);
@@ -343,9 +342,8 @@ static int iscsi_login_zero_tsih_s1(
kfree(sess);
return -ENOMEM;
}
- sup_pro_ops = conn->conn_transport->iscsit_get_sup_prot_ops(conn);
- sess->se_sess = transport_init_session(sup_pro_ops);
+ sess->se_sess = transport_init_session(TARGET_PROT_NORMAL);
if (IS_ERR(sess->se_sess)) {
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
ISCSI_LOGIN_STATUS_NO_RESOURCES);
@@ -1161,6 +1159,7 @@ void iscsi_target_login_sess_out(struct iscsi_conn *conn,
}
kfree(conn->sess->sess_ops);
kfree(conn->sess);
+ conn->sess = NULL;
old_sess_out:
iscsi_stop_login_thread_timer(np);
@@ -1204,6 +1203,9 @@ old_sess_out:
conn->sock = NULL;
}
+ if (conn->conn_transport->iscsit_wait_conn)
+ conn->conn_transport->iscsit_wait_conn(conn);
+
if (conn->conn_transport->iscsit_free_conn)
conn->conn_transport->iscsit_free_conn(conn);
@@ -1364,6 +1366,9 @@ static int __iscsi_target_login_thread(struct iscsi_np *np)
}
login->zero_tsih = zero_tsih;
+ conn->sess->se_sess->sup_prot_ops =
+ conn->conn_transport->iscsit_get_sup_prot_ops(conn);
+
tpg = conn->tpg;
if (!tpg) {
pr_err("Unable to locate struct iscsi_conn->tpg\n");
diff --git a/drivers/target/iscsi/iscsi_target_tpg.c b/drivers/target/iscsi/iscsi_target_tpg.c
index c3cb5c15efda..9053a3c0c6e5 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.c
+++ b/drivers/target/iscsi/iscsi_target_tpg.c
@@ -501,7 +501,6 @@ struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
init_completion(&tpg_np->tpg_np_comp);
kref_init(&tpg_np->tpg_np_kref);
tpg_np->tpg_np = np;
- np->tpg_np = tpg_np;
tpg_np->tpg = tpg;
spin_lock(&tpg->tpg_np_lock);
diff --git a/drivers/target/iscsi/iscsi_target_transport.c b/drivers/target/iscsi/iscsi_target_transport.c
index 882728fac30c..08217d62fb0d 100644
--- a/drivers/target/iscsi/iscsi_target_transport.c
+++ b/drivers/target/iscsi/iscsi_target_transport.c
@@ -26,8 +26,7 @@ struct iscsit_transport *iscsit_get_transport(int type)
void iscsit_put_transport(struct iscsit_transport *t)
{
- if (t->owner)
- module_put(t->owner);
+ module_put(t->owner);
}
int iscsit_register_transport(struct iscsit_transport *t)
diff --git a/drivers/target/iscsi/iscsi_target_util.c b/drivers/target/iscsi/iscsi_target_util.c
index 7c6a95bcb35e..bcd88ec99793 100644
--- a/drivers/target/iscsi/iscsi_target_util.c
+++ b/drivers/target/iscsi/iscsi_target_util.c
@@ -1356,15 +1356,15 @@ static int iscsit_do_tx_data(
struct iscsi_conn *conn,
struct iscsi_data_count *count)
{
- int data = count->data_length, total_tx = 0, tx_loop = 0, iov_len;
+ int ret, iov_len;
struct kvec *iov_p;
struct msghdr msg;
if (!conn || !conn->sock || !conn->conn_ops)
return -1;
- if (data <= 0) {
- pr_err("Data length is: %d\n", data);
+ if (count->data_length <= 0) {
+ pr_err("Data length is: %d\n", count->data_length);
return -1;
}
@@ -1373,20 +1373,16 @@ static int iscsit_do_tx_data(
iov_p = count->iov;
iov_len = count->iov_count;
- while (total_tx < data) {
- tx_loop = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len,
- (data - total_tx));
- if (tx_loop <= 0) {
- pr_debug("tx_loop: %d total_tx %d\n",
- tx_loop, total_tx);
- return tx_loop;
- }
- total_tx += tx_loop;
- pr_debug("tx_loop: %d, total_tx: %d, data: %d\n",
- tx_loop, total_tx, data);
+ ret = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len,
+ count->data_length);
+ if (ret != count->data_length) {
+ pr_err("Unexpected ret: %d send data %d\n",
+ ret, count->data_length);
+ return -EPIPE;
}
+ pr_debug("ret: %d, sent data: %d\n", ret, count->data_length);
- return total_tx;
+ return ret;
}
int rx_data(
diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c
index 4d1b7224a7f2..7172a71f9f0b 100644
--- a/drivers/target/loopback/tcm_loop.c
+++ b/drivers/target/loopback/tcm_loop.c
@@ -138,7 +138,7 @@ static void tcm_loop_submission_work(struct work_struct *work)
set_host_byte(sc, DID_TRANSPORT_DISRUPTED);
goto out_done;
}
- tl_nexus = tl_hba->tl_nexus;
+ tl_nexus = tl_tpg->tl_nexus;
if (!tl_nexus) {
scmd_printk(KERN_ERR, sc, "TCM_Loop I_T Nexus"
" does not exist\n");
@@ -218,16 +218,26 @@ static int tcm_loop_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *sc)
* to struct scsi_device
*/
static int tcm_loop_issue_tmr(struct tcm_loop_tpg *tl_tpg,
- struct tcm_loop_nexus *tl_nexus,
int lun, int task, enum tcm_tmreq_table tmr)
{
struct se_cmd *se_cmd = NULL;
struct se_session *se_sess;
struct se_portal_group *se_tpg;
+ struct tcm_loop_nexus *tl_nexus;
struct tcm_loop_cmd *tl_cmd = NULL;
struct tcm_loop_tmr *tl_tmr = NULL;
int ret = TMR_FUNCTION_FAILED, rc;
+ /*
+ * Locate the tl_nexus and se_sess pointers
+ */
+ tl_nexus = tl_tpg->tl_nexus;
+ if (!tl_nexus) {
+ pr_err("Unable to perform device reset without"
+ " active I_T Nexus\n");
+ return ret;
+ }
+
tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_KERNEL);
if (!tl_cmd) {
pr_err("Unable to allocate memory for tl_cmd\n");
@@ -243,7 +253,7 @@ static int tcm_loop_issue_tmr(struct tcm_loop_tpg *tl_tpg,
se_cmd = &tl_cmd->tl_se_cmd;
se_tpg = &tl_tpg->tl_se_tpg;
- se_sess = tl_nexus->se_sess;
+ se_sess = tl_tpg->tl_nexus->se_sess;
/*
* Initialize struct se_cmd descriptor from target_core_mod infrastructure
*/
@@ -288,7 +298,6 @@ release:
static int tcm_loop_abort_task(struct scsi_cmnd *sc)
{
struct tcm_loop_hba *tl_hba;
- struct tcm_loop_nexus *tl_nexus;
struct tcm_loop_tpg *tl_tpg;
int ret = FAILED;
@@ -296,21 +305,8 @@ static int tcm_loop_abort_task(struct scsi_cmnd *sc)
* Locate the tcm_loop_hba_t pointer
*/
tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host);
- /*
- * Locate the tl_nexus and se_sess pointers
- */
- tl_nexus = tl_hba->tl_nexus;
- if (!tl_nexus) {
- pr_err("Unable to perform device reset without"
- " active I_T Nexus\n");
- return FAILED;
- }
-
- /*
- * Locate the tl_tpg pointer from TargetID in sc->device->id
- */
tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id];
- ret = tcm_loop_issue_tmr(tl_tpg, tl_nexus, sc->device->lun,
+ ret = tcm_loop_issue_tmr(tl_tpg, sc->device->lun,
sc->request->tag, TMR_ABORT_TASK);
return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED;
}
@@ -322,7 +318,6 @@ static int tcm_loop_abort_task(struct scsi_cmnd *sc)
static int tcm_loop_device_reset(struct scsi_cmnd *sc)
{
struct tcm_loop_hba *tl_hba;
- struct tcm_loop_nexus *tl_nexus;
struct tcm_loop_tpg *tl_tpg;
int ret = FAILED;
@@ -330,20 +325,9 @@ static int tcm_loop_device_reset(struct scsi_cmnd *sc)
* Locate the tcm_loop_hba_t pointer
*/
tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host);
- /*
- * Locate the tl_nexus and se_sess pointers
- */
- tl_nexus = tl_hba->tl_nexus;
- if (!tl_nexus) {
- pr_err("Unable to perform device reset without"
- " active I_T Nexus\n");
- return FAILED;
- }
- /*
- * Locate the tl_tpg pointer from TargetID in sc->device->id
- */
tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id];
- ret = tcm_loop_issue_tmr(tl_tpg, tl_nexus, sc->device->lun,
+
+ ret = tcm_loop_issue_tmr(tl_tpg, sc->device->lun,
0, TMR_LUN_RESET);
return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED;
}
@@ -940,8 +924,8 @@ static int tcm_loop_make_nexus(
struct tcm_loop_nexus *tl_nexus;
int ret = -ENOMEM;
- if (tl_tpg->tl_hba->tl_nexus) {
- pr_debug("tl_tpg->tl_hba->tl_nexus already exists\n");
+ if (tl_tpg->tl_nexus) {
+ pr_debug("tl_tpg->tl_nexus already exists\n");
return -EEXIST;
}
se_tpg = &tl_tpg->tl_se_tpg;
@@ -976,7 +960,7 @@ static int tcm_loop_make_nexus(
*/
__transport_register_session(se_tpg, tl_nexus->se_sess->se_node_acl,
tl_nexus->se_sess, tl_nexus);
- tl_tpg->tl_hba->tl_nexus = tl_nexus;
+ tl_tpg->tl_nexus = tl_nexus;
pr_debug("TCM_Loop_ConfigFS: Established I_T Nexus to emulated"
" %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba),
name);
@@ -992,12 +976,8 @@ static int tcm_loop_drop_nexus(
{
struct se_session *se_sess;
struct tcm_loop_nexus *tl_nexus;
- struct tcm_loop_hba *tl_hba = tpg->tl_hba;
- if (!tl_hba)
- return -ENODEV;
-
- tl_nexus = tl_hba->tl_nexus;
+ tl_nexus = tpg->tl_nexus;
if (!tl_nexus)
return -ENODEV;
@@ -1013,13 +993,13 @@ static int tcm_loop_drop_nexus(
}
pr_debug("TCM_Loop_ConfigFS: Removing I_T Nexus to emulated"
- " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba),
+ " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tpg->tl_hba),
tl_nexus->se_sess->se_node_acl->initiatorname);
/*
* Release the SCSI I_T Nexus to the emulated SAS Target Port
*/
transport_deregister_session(tl_nexus->se_sess);
- tpg->tl_hba->tl_nexus = NULL;
+ tpg->tl_nexus = NULL;
kfree(tl_nexus);
return 0;
}
@@ -1035,7 +1015,7 @@ static ssize_t tcm_loop_tpg_show_nexus(
struct tcm_loop_nexus *tl_nexus;
ssize_t ret;
- tl_nexus = tl_tpg->tl_hba->tl_nexus;
+ tl_nexus = tl_tpg->tl_nexus;
if (!tl_nexus)
return -ENODEV;
diff --git a/drivers/target/loopback/tcm_loop.h b/drivers/target/loopback/tcm_loop.h
index 54c59d0b6608..6ae49f272ba6 100644
--- a/drivers/target/loopback/tcm_loop.h
+++ b/drivers/target/loopback/tcm_loop.h
@@ -27,11 +27,6 @@ struct tcm_loop_tmr {
};
struct tcm_loop_nexus {
- int it_nexus_active;
- /*
- * Pointer to Linux/SCSI HBA from linux/include/scsi_host.h
- */
- struct scsi_host *sh;
/*
* Pointer to TCM session for I_T Nexus
*/
@@ -51,6 +46,7 @@ struct tcm_loop_tpg {
atomic_t tl_tpg_port_count;
struct se_portal_group tl_se_tpg;
struct tcm_loop_hba *tl_hba;
+ struct tcm_loop_nexus *tl_nexus;
};
struct tcm_loop_hba {
@@ -59,7 +55,6 @@ struct tcm_loop_hba {
struct se_hba_s *se_hba;
struct se_lun *tl_hba_lun;
struct se_port *tl_hba_lun_sep;
- struct tcm_loop_nexus *tl_nexus;
struct device dev;
struct Scsi_Host *sh;
struct tcm_loop_tpg tl_hba_tpgs[TL_TPGS_PER_HBA];
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index 79f9296a08ae..75d89adfccc0 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -50,6 +50,19 @@
#include "target_core_rd.h"
#include "target_core_xcopy.h"
+#define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
+static void target_core_setup_##_name##_cit(struct se_subsystem_api *sa) \
+{ \
+ struct target_backend_cits *tbc = &sa->tb_cits; \
+ struct config_item_type *cit = &tbc->tb_##_name##_cit; \
+ \
+ cit->ct_item_ops = _item_ops; \
+ cit->ct_group_ops = _group_ops; \
+ cit->ct_attrs = _attrs; \
+ cit->ct_owner = sa->owner; \
+ pr_debug("Setup generic %s\n", __stringify(_name)); \
+}
+
extern struct t10_alua_lu_gp *default_lu_gp;
static LIST_HEAD(g_tf_list);
@@ -126,48 +139,57 @@ static struct config_group *target_core_register_fabric(
pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
" %s\n", group, name);
- /*
- * Below are some hardcoded request_module() calls to automatically
- * local fabric modules when the following is called:
- *
- * mkdir -p /sys/kernel/config/target/$MODULE_NAME
- *
- * Note that this does not limit which TCM fabric module can be
- * registered, but simply provids auto loading logic for modules with
- * mkdir(2) system calls with known TCM fabric modules.
- */
- if (!strncmp(name, "iscsi", 5)) {
+
+ tf = target_core_get_fabric(name);
+ if (!tf) {
+ pr_err("target_core_register_fabric() trying autoload for %s\n",
+ name);
+
/*
- * Automatically load the LIO Target fabric module when the
- * following is called:
+ * Below are some hardcoded request_module() calls to automatically
+ * local fabric modules when the following is called:
*
- * mkdir -p $CONFIGFS/target/iscsi
- */
- ret = request_module("iscsi_target_mod");
- if (ret < 0) {
- pr_err("request_module() failed for"
- " iscsi_target_mod.ko: %d\n", ret);
- return ERR_PTR(-EINVAL);
- }
- } else if (!strncmp(name, "loopback", 8)) {
- /*
- * Automatically load the tcm_loop fabric module when the
- * following is called:
+ * mkdir -p /sys/kernel/config/target/$MODULE_NAME
*
- * mkdir -p $CONFIGFS/target/loopback
+ * Note that this does not limit which TCM fabric module can be
+ * registered, but simply provids auto loading logic for modules with
+ * mkdir(2) system calls with known TCM fabric modules.
*/
- ret = request_module("tcm_loop");
- if (ret < 0) {
- pr_err("request_module() failed for"
- " tcm_loop.ko: %d\n", ret);
- return ERR_PTR(-EINVAL);
+
+ if (!strncmp(name, "iscsi", 5)) {
+ /*
+ * Automatically load the LIO Target fabric module when the
+ * following is called:
+ *
+ * mkdir -p $CONFIGFS/target/iscsi
+ */
+ ret = request_module("iscsi_target_mod");
+ if (ret < 0) {
+ pr_err("request_module() failed for"
+ " iscsi_target_mod.ko: %d\n", ret);
+ return ERR_PTR(-EINVAL);
+ }
+ } else if (!strncmp(name, "loopback", 8)) {
+ /*
+ * Automatically load the tcm_loop fabric module when the
+ * following is called:
+ *
+ * mkdir -p $CONFIGFS/target/loopback
+ */
+ ret = request_module("tcm_loop");
+ if (ret < 0) {
+ pr_err("request_module() failed for"
+ " tcm_loop.ko: %d\n", ret);
+ return ERR_PTR(-EINVAL);
+ }
}
+
+ tf = target_core_get_fabric(name);
}
- tf = target_core_get_fabric(name);
if (!tf) {
pr_err("target_core_get_fabric() failed for %s\n",
- name);
+ name);
return ERR_PTR(-EINVAL);
}
pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
@@ -562,198 +584,21 @@ EXPORT_SYMBOL(target_fabric_configfs_deregister);
// Stop functions called by external Target Fabrics Modules
//############################################################################*/
-/* Start functions for struct config_item_type target_core_dev_attrib_cit */
-
-#define DEF_DEV_ATTRIB_SHOW(_name) \
-static ssize_t target_core_dev_show_attr_##_name( \
- struct se_dev_attrib *da, \
- char *page) \
-{ \
- return snprintf(page, PAGE_SIZE, "%u\n", \
- (u32)da->da_dev->dev_attrib._name); \
-}
-
-#define DEF_DEV_ATTRIB_STORE(_name) \
-static ssize_t target_core_dev_store_attr_##_name( \
- struct se_dev_attrib *da, \
- const char *page, \
- size_t count) \
-{ \
- unsigned long val; \
- int ret; \
- \
- ret = kstrtoul(page, 0, &val); \
- if (ret < 0) { \
- pr_err("kstrtoul() failed with" \
- " ret: %d\n", ret); \
- return -EINVAL; \
- } \
- ret = se_dev_set_##_name(da->da_dev, (u32)val); \
- \
- return (!ret) ? count : -EINVAL; \
-}
-
-#define DEF_DEV_ATTRIB(_name) \
-DEF_DEV_ATTRIB_SHOW(_name); \
-DEF_DEV_ATTRIB_STORE(_name);
-
-#define DEF_DEV_ATTRIB_RO(_name) \
-DEF_DEV_ATTRIB_SHOW(_name);
+/* Start functions for struct config_item_type tb_dev_attrib_cit */
CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
-#define SE_DEV_ATTR(_name, _mode) \
-static struct target_core_dev_attrib_attribute \
- target_core_dev_attrib_##_name = \
- __CONFIGFS_EATTR(_name, _mode, \
- target_core_dev_show_attr_##_name, \
- target_core_dev_store_attr_##_name);
-
-#define SE_DEV_ATTR_RO(_name); \
-static struct target_core_dev_attrib_attribute \
- target_core_dev_attrib_##_name = \
- __CONFIGFS_EATTR_RO(_name, \
- target_core_dev_show_attr_##_name);
-
-DEF_DEV_ATTRIB(emulate_model_alias);
-SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(emulate_dpo);
-SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(emulate_fua_write);
-SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(emulate_fua_read);
-SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(emulate_write_cache);
-SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
-SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(emulate_tas);
-SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(emulate_tpu);
-SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(emulate_tpws);
-SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(emulate_caw);
-SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(emulate_3pc);
-SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(pi_prot_type);
-SE_DEV_ATTR(pi_prot_type, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB_RO(hw_pi_prot_type);
-SE_DEV_ATTR_RO(hw_pi_prot_type);
-
-DEF_DEV_ATTRIB(pi_prot_format);
-SE_DEV_ATTR(pi_prot_format, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(enforce_pr_isids);
-SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(is_nonrot);
-SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(emulate_rest_reord);
-SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(force_pr_aptpl);
-SE_DEV_ATTR(force_pr_aptpl, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB_RO(hw_block_size);
-SE_DEV_ATTR_RO(hw_block_size);
-
-DEF_DEV_ATTRIB(block_size);
-SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB_RO(hw_max_sectors);
-SE_DEV_ATTR_RO(hw_max_sectors);
-
-DEF_DEV_ATTRIB(fabric_max_sectors);
-SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(optimal_sectors);
-SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB_RO(hw_queue_depth);
-SE_DEV_ATTR_RO(hw_queue_depth);
-
-DEF_DEV_ATTRIB(queue_depth);
-SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(max_unmap_lba_count);
-SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(max_unmap_block_desc_count);
-SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(unmap_granularity);
-SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(unmap_granularity_alignment);
-SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
-
-DEF_DEV_ATTRIB(max_write_same_len);
-SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
-
CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
-static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
- &target_core_dev_attrib_emulate_model_alias.attr,
- &target_core_dev_attrib_emulate_dpo.attr,
- &target_core_dev_attrib_emulate_fua_write.attr,
- &target_core_dev_attrib_emulate_fua_read.attr,
- &target_core_dev_attrib_emulate_write_cache.attr,
- &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
- &target_core_dev_attrib_emulate_tas.attr,
- &target_core_dev_attrib_emulate_tpu.attr,
- &target_core_dev_attrib_emulate_tpws.attr,
- &target_core_dev_attrib_emulate_caw.attr,
- &target_core_dev_attrib_emulate_3pc.attr,
- &target_core_dev_attrib_pi_prot_type.attr,
- &target_core_dev_attrib_hw_pi_prot_type.attr,
- &target_core_dev_attrib_pi_prot_format.attr,
- &target_core_dev_attrib_enforce_pr_isids.attr,
- &target_core_dev_attrib_force_pr_aptpl.attr,
- &target_core_dev_attrib_is_nonrot.attr,
- &target_core_dev_attrib_emulate_rest_reord.attr,
- &target_core_dev_attrib_hw_block_size.attr,
- &target_core_dev_attrib_block_size.attr,
- &target_core_dev_attrib_hw_max_sectors.attr,
- &target_core_dev_attrib_fabric_max_sectors.attr,
- &target_core_dev_attrib_optimal_sectors.attr,
- &target_core_dev_attrib_hw_queue_depth.attr,
- &target_core_dev_attrib_queue_depth.attr,
- &target_core_dev_attrib_max_unmap_lba_count.attr,
- &target_core_dev_attrib_max_unmap_block_desc_count.attr,
- &target_core_dev_attrib_unmap_granularity.attr,
- &target_core_dev_attrib_unmap_granularity_alignment.attr,
- &target_core_dev_attrib_max_write_same_len.attr,
- NULL,
-};
-
static struct configfs_item_operations target_core_dev_attrib_ops = {
.show_attribute = target_core_dev_attrib_attr_show,
.store_attribute = target_core_dev_attrib_attr_store,
};
-static struct config_item_type target_core_dev_attrib_cit = {
- .ct_item_ops = &target_core_dev_attrib_ops,
- .ct_attrs = target_core_dev_attrib_attrs,
- .ct_owner = THIS_MODULE,
-};
+TB_CIT_SETUP(dev_attrib, &target_core_dev_attrib_ops, NULL, NULL);
-/* End functions for struct config_item_type target_core_dev_attrib_cit */
+/* End functions for struct config_item_type tb_dev_attrib_cit */
-/* Start functions for struct config_item_type target_core_dev_wwn_cit */
+/* Start functions for struct config_item_type tb_dev_wwn_cit */
CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
#define SE_DEV_WWN_ATTR(_name, _mode) \
@@ -984,15 +829,11 @@ static struct configfs_item_operations target_core_dev_wwn_ops = {
.store_attribute = target_core_dev_wwn_attr_store,
};
-static struct config_item_type target_core_dev_wwn_cit = {
- .ct_item_ops = &target_core_dev_wwn_ops,
- .ct_attrs = target_core_dev_wwn_attrs,
- .ct_owner = THIS_MODULE,
-};
+TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs);
-/* End functions for struct config_item_type target_core_dev_wwn_cit */
+/* End functions for struct config_item_type tb_dev_wwn_cit */
-/* Start functions for struct config_item_type target_core_dev_pr_cit */
+/* Start functions for struct config_item_type tb_dev_pr_cit */
CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
#define SE_DEV_PR_ATTR(_name, _mode) \
@@ -1453,15 +1294,11 @@ static struct configfs_item_operations target_core_dev_pr_ops = {
.store_attribute = target_core_dev_pr_attr_store,
};
-static struct config_item_type target_core_dev_pr_cit = {
- .ct_item_ops = &target_core_dev_pr_ops,
- .ct_attrs = target_core_dev_pr_attrs,
- .ct_owner = THIS_MODULE,
-};
+TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs);
-/* End functions for struct config_item_type target_core_dev_pr_cit */
+/* End functions for struct config_item_type tb_dev_pr_cit */
-/* Start functions for struct config_item_type target_core_dev_cit */
+/* Start functions for struct config_item_type tb_dev_cit */
static ssize_t target_core_show_dev_info(void *p, char *page)
{
@@ -1925,7 +1762,7 @@ static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
.store = target_core_store_dev_lba_map,
};
-static struct configfs_attribute *lio_core_dev_attrs[] = {
+static struct configfs_attribute *target_core_dev_attrs[] = {
&target_core_attr_dev_info.attr,
&target_core_attr_dev_control.attr,
&target_core_attr_dev_alias.attr,
@@ -1984,13 +1821,9 @@ static struct configfs_item_operations target_core_dev_item_ops = {
.store_attribute = target_core_dev_store,
};
-static struct config_item_type target_core_dev_cit = {
- .ct_item_ops = &target_core_dev_item_ops,
- .ct_attrs = lio_core_dev_attrs,
- .ct_owner = THIS_MODULE,
-};
+TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
-/* End functions for struct config_item_type target_core_dev_cit */
+/* End functions for struct config_item_type tb_dev_cit */
/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
@@ -2670,7 +2503,7 @@ static struct config_item_type target_core_alua_tg_pt_gp_cit = {
/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
-/* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
+/* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
static struct config_group *target_core_alua_create_tg_pt_gp(
struct config_group *group,
@@ -2721,12 +2554,9 @@ static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
.drop_item = &target_core_alua_drop_tg_pt_gp,
};
-static struct config_item_type target_core_alua_tg_pt_gps_cit = {
- .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
- .ct_owner = THIS_MODULE,
-};
+TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
-/* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
+/* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
/* Start functions for struct config_item_type target_core_alua_cit */
@@ -2744,7 +2574,7 @@ static struct config_item_type target_core_alua_cit = {
/* End functions for struct config_item_type target_core_alua_cit */
-/* Start functions for struct config_item_type target_core_stat_cit */
+/* Start functions for struct config_item_type tb_dev_stat_cit */
static struct config_group *target_core_stat_mkdir(
struct config_group *group,
@@ -2765,12 +2595,9 @@ static struct configfs_group_operations target_core_stat_group_ops = {
.drop_item = &target_core_stat_rmdir,
};
-static struct config_item_type target_core_stat_cit = {
- .ct_group_ops = &target_core_stat_group_ops,
- .ct_owner = THIS_MODULE,
-};
+TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
-/* End functions for struct config_item_type target_core_stat_cit */
+/* End functions for struct config_item_type tb_dev_stat_cit */
/* Start functions for struct config_item_type target_core_hba_cit */
@@ -2806,17 +2633,17 @@ static struct config_group *target_core_make_subdev(
if (!dev_cg->default_groups)
goto out_free_device;
- config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
+ config_group_init_type_name(dev_cg, name, &t->tb_cits.tb_dev_cit);
config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
- &target_core_dev_attrib_cit);
+ &t->tb_cits.tb_dev_attrib_cit);
config_group_init_type_name(&dev->dev_pr_group, "pr",
- &target_core_dev_pr_cit);
+ &t->tb_cits.tb_dev_pr_cit);
config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
- &target_core_dev_wwn_cit);
+ &t->tb_cits.tb_dev_wwn_cit);
config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
- "alua", &target_core_alua_tg_pt_gps_cit);
+ "alua", &t->tb_cits.tb_dev_alua_tg_pt_gps_cit);
config_group_init_type_name(&dev->dev_stat_grps.stat_group,
- "statistics", &target_core_stat_cit);
+ "statistics", &t->tb_cits.tb_dev_stat_cit);
dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
dev_cg->default_groups[1] = &dev->dev_pr_group;
@@ -3110,6 +2937,17 @@ static struct config_item_type target_core_cit = {
/* Stop functions for struct config_item_type target_core_hba_cit */
+void target_core_setup_sub_cits(struct se_subsystem_api *sa)
+{
+ target_core_setup_dev_cit(sa);
+ target_core_setup_dev_attrib_cit(sa);
+ target_core_setup_dev_pr_cit(sa);
+ target_core_setup_dev_wwn_cit(sa);
+ target_core_setup_dev_alua_tg_pt_gps_cit(sa);
+ target_core_setup_dev_stat_cit(sa);
+}
+EXPORT_SYMBOL(target_core_setup_sub_cits);
+
static int __init target_core_init_configfs(void)
{
struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
index c45f9e907e44..7653cfb027a2 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -659,6 +659,7 @@ int se_dev_set_max_unmap_lba_count(
dev, dev->dev_attrib.max_unmap_lba_count);
return 0;
}
+EXPORT_SYMBOL(se_dev_set_max_unmap_lba_count);
int se_dev_set_max_unmap_block_desc_count(
struct se_device *dev,
@@ -670,6 +671,7 @@ int se_dev_set_max_unmap_block_desc_count(
dev, dev->dev_attrib.max_unmap_block_desc_count);
return 0;
}
+EXPORT_SYMBOL(se_dev_set_max_unmap_block_desc_count);
int se_dev_set_unmap_granularity(
struct se_device *dev,
@@ -680,6 +682,7 @@ int se_dev_set_unmap_granularity(
dev, dev->dev_attrib.unmap_granularity);
return 0;
}
+EXPORT_SYMBOL(se_dev_set_unmap_granularity);
int se_dev_set_unmap_granularity_alignment(
struct se_device *dev,
@@ -690,6 +693,7 @@ int se_dev_set_unmap_granularity_alignment(
dev, dev->dev_attrib.unmap_granularity_alignment);
return 0;
}
+EXPORT_SYMBOL(se_dev_set_unmap_granularity_alignment);
int se_dev_set_max_write_same_len(
struct se_device *dev,
@@ -700,6 +704,7 @@ int se_dev_set_max_write_same_len(
dev, dev->dev_attrib.max_write_same_len);
return 0;
}
+EXPORT_SYMBOL(se_dev_set_max_write_same_len);
static void dev_set_t10_wwn_model_alias(struct se_device *dev)
{
@@ -738,6 +743,7 @@ int se_dev_set_emulate_model_alias(struct se_device *dev, int flag)
return 0;
}
+EXPORT_SYMBOL(se_dev_set_emulate_model_alias);
int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
{
@@ -753,6 +759,7 @@ int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
return 0;
}
+EXPORT_SYMBOL(se_dev_set_emulate_dpo);
int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
{
@@ -760,17 +767,12 @@ int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
pr_err("Illegal value %d\n", flag);
return -EINVAL;
}
-
- if (flag &&
- dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
- pr_err("emulate_fua_write not supported for pSCSI\n");
- return -EINVAL;
- }
dev->dev_attrib.emulate_fua_write = flag;
pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
dev, dev->dev_attrib.emulate_fua_write);
return 0;
}
+EXPORT_SYMBOL(se_dev_set_emulate_fua_write);
int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
{
@@ -786,6 +788,7 @@ int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
return 0;
}
+EXPORT_SYMBOL(se_dev_set_emulate_fua_read);
int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
{
@@ -794,11 +797,6 @@ int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
return -EINVAL;
}
if (flag &&
- dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
- pr_err("emulate_write_cache not supported for pSCSI\n");
- return -EINVAL;
- }
- if (flag &&
dev->transport->get_write_cache) {
pr_err("emulate_write_cache not supported for this device\n");
return -EINVAL;
@@ -809,6 +807,7 @@ int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
dev, dev->dev_attrib.emulate_write_cache);
return 0;
}
+EXPORT_SYMBOL(se_dev_set_emulate_write_cache);
int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
{
@@ -829,6 +828,7 @@ int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
return 0;
}
+EXPORT_SYMBOL(se_dev_set_emulate_ua_intlck_ctrl);
int se_dev_set_emulate_tas(struct se_device *dev, int flag)
{
@@ -849,6 +849,7 @@ int se_dev_set_emulate_tas(struct se_device *dev, int flag)
return 0;
}
+EXPORT_SYMBOL(se_dev_set_emulate_tas);
int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
{
@@ -870,6 +871,7 @@ int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
dev, flag);
return 0;
}
+EXPORT_SYMBOL(se_dev_set_emulate_tpu);
int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
{
@@ -891,6 +893,7 @@ int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
dev, flag);
return 0;
}
+EXPORT_SYMBOL(se_dev_set_emulate_tpws);
int se_dev_set_emulate_caw(struct se_device *dev, int flag)
{
@@ -904,6 +907,7 @@ int se_dev_set_emulate_caw(struct se_device *dev, int flag)
return 0;
}
+EXPORT_SYMBOL(se_dev_set_emulate_caw);
int se_dev_set_emulate_3pc(struct se_device *dev, int flag)
{
@@ -917,6 +921,7 @@ int se_dev_set_emulate_3pc(struct se_device *dev, int flag)
return 0;
}
+EXPORT_SYMBOL(se_dev_set_emulate_3pc);
int se_dev_set_pi_prot_type(struct se_device *dev, int flag)
{
@@ -970,6 +975,7 @@ int se_dev_set_pi_prot_type(struct se_device *dev, int flag)
return 0;
}
+EXPORT_SYMBOL(se_dev_set_pi_prot_type);
int se_dev_set_pi_prot_format(struct se_device *dev, int flag)
{
@@ -1005,6 +1011,7 @@ int se_dev_set_pi_prot_format(struct se_device *dev, int flag)
return 0;
}
+EXPORT_SYMBOL(se_dev_set_pi_prot_format);
int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
{
@@ -1017,6 +1024,7 @@ int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
(dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
return 0;
}
+EXPORT_SYMBOL(se_dev_set_enforce_pr_isids);
int se_dev_set_force_pr_aptpl(struct se_device *dev, int flag)
{
@@ -1034,6 +1042,7 @@ int se_dev_set_force_pr_aptpl(struct se_device *dev, int flag)
pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", dev, flag);
return 0;
}
+EXPORT_SYMBOL(se_dev_set_force_pr_aptpl);
int se_dev_set_is_nonrot(struct se_device *dev, int flag)
{
@@ -1046,6 +1055,7 @@ int se_dev_set_is_nonrot(struct se_device *dev, int flag)
dev, flag);
return 0;
}
+EXPORT_SYMBOL(se_dev_set_is_nonrot);
int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
{
@@ -1058,6 +1068,7 @@ int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
return 0;
}
+EXPORT_SYMBOL(se_dev_set_emulate_rest_reord);
/*
* Note, this can only be called on unexported SE Device Object.
@@ -1076,31 +1087,21 @@ int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
return -EINVAL;
}
- if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+ if (queue_depth > dev->dev_attrib.queue_depth) {
if (queue_depth > dev->dev_attrib.hw_queue_depth) {
- pr_err("dev[%p]: Passed queue_depth: %u"
- " exceeds TCM/SE_Device TCQ: %u\n",
- dev, queue_depth,
+ pr_err("dev[%p]: Passed queue_depth:"
+ " %u exceeds TCM/SE_Device MAX"
+ " TCQ: %u\n", dev, queue_depth,
dev->dev_attrib.hw_queue_depth);
return -EINVAL;
}
- } else {
- if (queue_depth > dev->dev_attrib.queue_depth) {
- if (queue_depth > dev->dev_attrib.hw_queue_depth) {
- pr_err("dev[%p]: Passed queue_depth:"
- " %u exceeds TCM/SE_Device MAX"
- " TCQ: %u\n", dev, queue_depth,
- dev->dev_attrib.hw_queue_depth);
- return -EINVAL;
- }
- }
}
-
dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth;
pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
dev, queue_depth);
return 0;
}
+EXPORT_SYMBOL(se_dev_set_queue_depth);
int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
{
@@ -1123,22 +1124,12 @@ int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
DA_STATUS_MAX_SECTORS_MIN);
return -EINVAL;
}
- if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
- if (fabric_max_sectors > dev->dev_attrib.hw_max_sectors) {
- pr_err("dev[%p]: Passed fabric_max_sectors: %u"
- " greater than TCM/SE_Device max_sectors:"
- " %u\n", dev, fabric_max_sectors,
- dev->dev_attrib.hw_max_sectors);
- return -EINVAL;
- }
- } else {
- if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
- pr_err("dev[%p]: Passed fabric_max_sectors: %u"
- " greater than DA_STATUS_MAX_SECTORS_MAX:"
- " %u\n", dev, fabric_max_sectors,
- DA_STATUS_MAX_SECTORS_MAX);
- return -EINVAL;
- }
+ if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
+ pr_err("dev[%p]: Passed fabric_max_sectors: %u"
+ " greater than DA_STATUS_MAX_SECTORS_MAX:"
+ " %u\n", dev, fabric_max_sectors,
+ DA_STATUS_MAX_SECTORS_MAX);
+ return -EINVAL;
}
/*
* Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
@@ -1155,6 +1146,7 @@ int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
dev, fabric_max_sectors);
return 0;
}
+EXPORT_SYMBOL(se_dev_set_fabric_max_sectors);
int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
{
@@ -1164,11 +1156,6 @@ int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
dev, dev->export_count);
return -EINVAL;
}
- if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
- pr_err("dev[%p]: Passed optimal_sectors cannot be"
- " changed for TCM/pSCSI\n", dev);
- return -EINVAL;
- }
if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) {
pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
" greater than fabric_max_sectors: %u\n", dev,
@@ -1181,6 +1168,7 @@ int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
dev, optimal_sectors);
return 0;
}
+EXPORT_SYMBOL(se_dev_set_optimal_sectors);
int se_dev_set_block_size(struct se_device *dev, u32 block_size)
{
@@ -1201,13 +1189,6 @@ int se_dev_set_block_size(struct se_device *dev, u32 block_size)
return -EINVAL;
}
- if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
- pr_err("dev[%p]: Not allowed to change block_size for"
- " Physical Device, use for Linux/SCSI to change"
- " block_size for underlying hardware\n", dev);
- return -EINVAL;
- }
-
dev->dev_attrib.block_size = block_size;
pr_debug("dev[%p]: SE Device block_size changed to %u\n",
dev, block_size);
@@ -1218,6 +1199,7 @@ int se_dev_set_block_size(struct se_device *dev, u32 block_size)
return 0;
}
+EXPORT_SYMBOL(se_dev_set_block_size);
struct se_lun *core_dev_add_lun(
struct se_portal_group *tpg,
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index 72c83d98662b..c2aea099ea4a 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -37,6 +37,7 @@
#include <target/target_core_base.h>
#include <target/target_core_backend.h>
+#include <target/target_core_backend_configfs.h>
#include "target_core_file.h"
@@ -934,6 +935,42 @@ fd_parse_cdb(struct se_cmd *cmd)
return sbc_parse_cdb(cmd, &fd_sbc_ops);
}
+DEF_TB_DEFAULT_ATTRIBS(fileio);
+
+static struct configfs_attribute *fileio_backend_dev_attrs[] = {
+ &fileio_dev_attrib_emulate_model_alias.attr,
+ &fileio_dev_attrib_emulate_dpo.attr,
+ &fileio_dev_attrib_emulate_fua_write.attr,
+ &fileio_dev_attrib_emulate_fua_read.attr,
+ &fileio_dev_attrib_emulate_write_cache.attr,
+ &fileio_dev_attrib_emulate_ua_intlck_ctrl.attr,
+ &fileio_dev_attrib_emulate_tas.attr,
+ &fileio_dev_attrib_emulate_tpu.attr,
+ &fileio_dev_attrib_emulate_tpws.attr,
+ &fileio_dev_attrib_emulate_caw.attr,
+ &fileio_dev_attrib_emulate_3pc.attr,
+ &fileio_dev_attrib_pi_prot_type.attr,
+ &fileio_dev_attrib_hw_pi_prot_type.attr,
+ &fileio_dev_attrib_pi_prot_format.attr,
+ &fileio_dev_attrib_enforce_pr_isids.attr,
+ &fileio_dev_attrib_is_nonrot.attr,
+ &fileio_dev_attrib_emulate_rest_reord.attr,
+ &fileio_dev_attrib_force_pr_aptpl.attr,
+ &fileio_dev_attrib_hw_block_size.attr,
+ &fileio_dev_attrib_block_size.attr,
+ &fileio_dev_attrib_hw_max_sectors.attr,
+ &fileio_dev_attrib_fabric_max_sectors.attr,
+ &fileio_dev_attrib_optimal_sectors.attr,
+ &fileio_dev_attrib_hw_queue_depth.attr,
+ &fileio_dev_attrib_queue_depth.attr,
+ &fileio_dev_attrib_max_unmap_lba_count.attr,
+ &fileio_dev_attrib_max_unmap_block_desc_count.attr,
+ &fileio_dev_attrib_unmap_granularity.attr,
+ &fileio_dev_attrib_unmap_granularity_alignment.attr,
+ &fileio_dev_attrib_max_write_same_len.attr,
+ NULL,
+};
+
static struct se_subsystem_api fileio_template = {
.name = "fileio",
.inquiry_prod = "FILEIO",
@@ -957,6 +994,11 @@ static struct se_subsystem_api fileio_template = {
static int __init fileio_module_init(void)
{
+ struct target_backend_cits *tbc = &fileio_template.tb_cits;
+
+ target_core_setup_sub_cits(&fileio_template);
+ tbc->tb_dev_attrib_cit.ct_attrs = fileio_backend_dev_attrs;
+
return transport_subsystem_register(&fileio_template);
}
diff --git a/drivers/target/target_core_hba.c b/drivers/target/target_core_hba.c
index a25051a37dd7..ff95f95dcd13 100644
--- a/drivers/target/target_core_hba.c
+++ b/drivers/target/target_core_hba.c
@@ -36,6 +36,7 @@
#include <target/target_core_base.h>
#include <target/target_core_backend.h>
#include <target/target_core_fabric.h>
+#include <target/target_core_configfs.h>
#include "target_core_internal.h"
@@ -137,8 +138,7 @@ core_alloc_hba(const char *plugin_name, u32 plugin_dep_id, u32 hba_flags)
return hba;
out_module_put:
- if (hba->transport->owner)
- module_put(hba->transport->owner);
+ module_put(hba->transport->owner);
hba->transport = NULL;
out_free_hba:
kfree(hba);
@@ -159,8 +159,7 @@ core_delete_hba(struct se_hba *hba)
pr_debug("CORE_HBA[%d] - Detached HBA from Generic Target"
" Core\n", hba->hba_id);
- if (hba->transport->owner)
- module_put(hba->transport->owner);
+ module_put(hba->transport->owner);
hba->transport = NULL;
kfree(hba);
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index 7e6b857c6b3f..3efff94fbd97 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -41,6 +41,7 @@
#include <target/target_core_base.h>
#include <target/target_core_backend.h>
+#include <target/target_core_backend_configfs.h>
#include "target_core_iblock.h"
@@ -858,6 +859,42 @@ static bool iblock_get_write_cache(struct se_device *dev)
return q->flush_flags & REQ_FLUSH;
}
+DEF_TB_DEFAULT_ATTRIBS(iblock);
+
+static struct configfs_attribute *iblock_backend_dev_attrs[] = {
+ &iblock_dev_attrib_emulate_model_alias.attr,
+ &iblock_dev_attrib_emulate_dpo.attr,
+ &iblock_dev_attrib_emulate_fua_write.attr,
+ &iblock_dev_attrib_emulate_fua_read.attr,
+ &iblock_dev_attrib_emulate_write_cache.attr,
+ &iblock_dev_attrib_emulate_ua_intlck_ctrl.attr,
+ &iblock_dev_attrib_emulate_tas.attr,
+ &iblock_dev_attrib_emulate_tpu.attr,
+ &iblock_dev_attrib_emulate_tpws.attr,
+ &iblock_dev_attrib_emulate_caw.attr,
+ &iblock_dev_attrib_emulate_3pc.attr,
+ &iblock_dev_attrib_pi_prot_type.attr,
+ &iblock_dev_attrib_hw_pi_prot_type.attr,
+ &iblock_dev_attrib_pi_prot_format.attr,
+ &iblock_dev_attrib_enforce_pr_isids.attr,
+ &iblock_dev_attrib_is_nonrot.attr,
+ &iblock_dev_attrib_emulate_rest_reord.attr,
+ &iblock_dev_attrib_force_pr_aptpl.attr,
+ &iblock_dev_attrib_hw_block_size.attr,
+ &iblock_dev_attrib_block_size.attr,
+ &iblock_dev_attrib_hw_max_sectors.attr,
+ &iblock_dev_attrib_fabric_max_sectors.attr,
+ &iblock_dev_attrib_optimal_sectors.attr,
+ &iblock_dev_attrib_hw_queue_depth.attr,
+ &iblock_dev_attrib_queue_depth.attr,
+ &iblock_dev_attrib_max_unmap_lba_count.attr,
+ &iblock_dev_attrib_max_unmap_block_desc_count.attr,
+ &iblock_dev_attrib_unmap_granularity.attr,
+ &iblock_dev_attrib_unmap_granularity_alignment.attr,
+ &iblock_dev_attrib_max_write_same_len.attr,
+ NULL,
+};
+
static struct se_subsystem_api iblock_template = {
.name = "iblock",
.inquiry_prod = "IBLOCK",
@@ -883,6 +920,11 @@ static struct se_subsystem_api iblock_template = {
static int __init iblock_module_init(void)
{
+ struct target_backend_cits *tbc = &iblock_template.tb_cits;
+
+ target_core_setup_sub_cits(&iblock_template);
+ tbc->tb_dev_attrib_cit.ct_attrs = iblock_backend_dev_attrs;
+
return transport_subsystem_register(&iblock_template);
}
diff --git a/drivers/target/target_core_internal.h b/drivers/target/target_core_internal.h
index e31f42f369ff..60381db90026 100644
--- a/drivers/target/target_core_internal.h
+++ b/drivers/target/target_core_internal.h
@@ -18,34 +18,6 @@ int core_dev_export(struct se_device *, struct se_portal_group *,
struct se_lun *);
void core_dev_unexport(struct se_device *, struct se_portal_group *,
struct se_lun *);
-int se_dev_set_task_timeout(struct se_device *, u32);
-int se_dev_set_max_unmap_lba_count(struct se_device *, u32);
-int se_dev_set_max_unmap_block_desc_count(struct se_device *, u32);
-int se_dev_set_unmap_granularity(struct se_device *, u32);
-int se_dev_set_unmap_granularity_alignment(struct se_device *, u32);
-int se_dev_set_max_write_same_len(struct se_device *, u32);
-int se_dev_set_emulate_model_alias(struct se_device *, int);
-int se_dev_set_emulate_dpo(struct se_device *, int);
-int se_dev_set_emulate_fua_write(struct se_device *, int);
-int se_dev_set_emulate_fua_read(struct se_device *, int);
-int se_dev_set_emulate_write_cache(struct se_device *, int);
-int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *, int);
-int se_dev_set_emulate_tas(struct se_device *, int);
-int se_dev_set_emulate_tpu(struct se_device *, int);
-int se_dev_set_emulate_tpws(struct se_device *, int);
-int se_dev_set_emulate_caw(struct se_device *, int);
-int se_dev_set_emulate_3pc(struct se_device *, int);
-int se_dev_set_pi_prot_type(struct se_device *, int);
-int se_dev_set_pi_prot_format(struct se_device *, int);
-int se_dev_set_enforce_pr_isids(struct se_device *, int);
-int se_dev_set_force_pr_aptpl(struct se_device *, int);
-int se_dev_set_is_nonrot(struct se_device *, int);
-int se_dev_set_emulate_rest_reord(struct se_device *dev, int);
-int se_dev_set_queue_depth(struct se_device *, u32);
-int se_dev_set_max_sectors(struct se_device *, u32);
-int se_dev_set_fabric_max_sectors(struct se_device *, u32);
-int se_dev_set_optimal_sectors(struct se_device *, u32);
-int se_dev_set_block_size(struct se_device *, u32);
struct se_lun *core_dev_add_lun(struct se_portal_group *, struct se_device *, u32);
void core_dev_del_lun(struct se_portal_group *, struct se_lun *);
struct se_lun *core_get_lun_from_tpg(struct se_portal_group *, u32);
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c
index 4c261c33cf55..d56f2aaba9af 100644
--- a/drivers/target/target_core_pr.c
+++ b/drivers/target/target_core_pr.c
@@ -76,7 +76,7 @@ enum preempt_type {
};
static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *,
- struct t10_pr_registration *, int);
+ struct t10_pr_registration *, int, int);
static sense_reason_t
target_scsi2_reservation_check(struct se_cmd *cmd)
@@ -1177,7 +1177,7 @@ static int core_scsi3_check_implicit_release(
* service action with the SERVICE ACTION RESERVATION KEY
* field set to zero (see 5.7.11.3).
*/
- __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0);
+ __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0, 1);
ret = 1;
/*
* For 'All Registrants' reservation types, all existing
@@ -1219,7 +1219,8 @@ static void __core_scsi3_free_registration(
pr_reg->pr_reg_deve->def_pr_registered = 0;
pr_reg->pr_reg_deve->pr_res_key = 0;
- list_del(&pr_reg->pr_reg_list);
+ if (!list_empty(&pr_reg->pr_reg_list))
+ list_del(&pr_reg->pr_reg_list);
/*
* Caller accessing *pr_reg using core_scsi3_locate_pr_reg(),
* so call core_scsi3_put_pr_reg() to decrement our reference.
@@ -1271,6 +1272,7 @@ void core_scsi3_free_pr_reg_from_nacl(
{
struct t10_reservation *pr_tmpl = &dev->t10_pr;
struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder;
+ bool free_reg = false;
/*
* If the passed se_node_acl matches the reservation holder,
* release the reservation.
@@ -1278,13 +1280,18 @@ void core_scsi3_free_pr_reg_from_nacl(
spin_lock(&dev->dev_reservation_lock);
pr_res_holder = dev->dev_pr_res_holder;
if ((pr_res_holder != NULL) &&
- (pr_res_holder->pr_reg_nacl == nacl))
- __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0);
+ (pr_res_holder->pr_reg_nacl == nacl)) {
+ __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0, 1);
+ free_reg = true;
+ }
spin_unlock(&dev->dev_reservation_lock);
/*
* Release any registration associated with the struct se_node_acl.
*/
spin_lock(&pr_tmpl->registration_lock);
+ if (pr_res_holder && free_reg)
+ __core_scsi3_free_registration(dev, pr_res_holder, NULL, 0);
+
list_for_each_entry_safe(pr_reg, pr_reg_tmp,
&pr_tmpl->registration_list, pr_reg_list) {
@@ -1307,7 +1314,7 @@ void core_scsi3_free_all_registrations(
if (pr_res_holder != NULL) {
struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
__core_scsi3_complete_pro_release(dev, pr_res_nacl,
- pr_res_holder, 0);
+ pr_res_holder, 0, 0);
}
spin_unlock(&dev->dev_reservation_lock);
@@ -1429,14 +1436,12 @@ core_scsi3_decode_spec_i_port(
struct target_core_fabric_ops *tmp_tf_ops;
unsigned char *buf;
unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident;
- char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN];
+ char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN];
sense_reason_t ret;
u32 tpdl, tid_len = 0;
int dest_local_nexus;
u32 dest_rtpi = 0;
- memset(dest_iport, 0, 64);
-
local_se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
/*
* Allocate a struct pr_transport_id_holder and setup the
@@ -2105,13 +2110,13 @@ core_scsi3_emulate_pro_register(struct se_cmd *cmd, u64 res_key, u64 sa_res_key,
/*
* sa_res_key=0 Unregister Reservation Key for registered I_T Nexus.
*/
- pr_holder = core_scsi3_check_implicit_release(
- cmd->se_dev, pr_reg);
+ type = pr_reg->pr_res_type;
+ pr_holder = core_scsi3_check_implicit_release(cmd->se_dev,
+ pr_reg);
if (pr_holder < 0) {
ret = TCM_RESERVATION_CONFLICT;
goto out;
}
- type = pr_reg->pr_res_type;
spin_lock(&pr_tmpl->registration_lock);
/*
@@ -2269,6 +2274,7 @@ core_scsi3_pro_reserve(struct se_cmd *cmd, int type, int scope, u64 res_key)
spin_lock(&dev->dev_reservation_lock);
pr_res_holder = dev->dev_pr_res_holder;
if (pr_res_holder) {
+ int pr_res_type = pr_res_holder->pr_res_type;
/*
* From spc4r17 Section 5.7.9: Reserving:
*
@@ -2279,7 +2285,9 @@ core_scsi3_pro_reserve(struct se_cmd *cmd, int type, int scope, u64 res_key)
* the logical unit, then the command shall be completed with
* RESERVATION CONFLICT status.
*/
- if (pr_res_holder != pr_reg) {
+ if ((pr_res_holder != pr_reg) &&
+ (pr_res_type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) &&
+ (pr_res_type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) {
struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
pr_err("SPC-3 PR: Attempted RESERVE from"
" [%s]: %s while reservation already held by"
@@ -2385,23 +2393,59 @@ static void __core_scsi3_complete_pro_release(
struct se_device *dev,
struct se_node_acl *se_nacl,
struct t10_pr_registration *pr_reg,
- int explicit)
+ int explicit,
+ int unreg)
{
struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo;
char i_buf[PR_REG_ISID_ID_LEN];
+ int pr_res_type = 0, pr_res_scope = 0;
memset(i_buf, 0, PR_REG_ISID_ID_LEN);
core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
/*
* Go ahead and release the current PR reservation holder.
+ * If an All Registrants reservation is currently active and
+ * a unregister operation is requested, replace the current
+ * dev_pr_res_holder with another active registration.
*/
- dev->dev_pr_res_holder = NULL;
+ if (dev->dev_pr_res_holder) {
+ pr_res_type = dev->dev_pr_res_holder->pr_res_type;
+ pr_res_scope = dev->dev_pr_res_holder->pr_res_scope;
+ dev->dev_pr_res_holder->pr_res_type = 0;
+ dev->dev_pr_res_holder->pr_res_scope = 0;
+ dev->dev_pr_res_holder->pr_res_holder = 0;
+ dev->dev_pr_res_holder = NULL;
+ }
+ if (!unreg)
+ goto out;
- pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared"
- " reservation holder TYPE: %s ALL_TG_PT: %d\n",
- tfo->get_fabric_name(), (explicit) ? "explicit" : "implicit",
- core_scsi3_pr_dump_type(pr_reg->pr_res_type),
- (pr_reg->pr_reg_all_tg_pt) ? 1 : 0);
+ spin_lock(&dev->t10_pr.registration_lock);
+ list_del_init(&pr_reg->pr_reg_list);
+ /*
+ * If the I_T nexus is a reservation holder, the persistent reservation
+ * is of an all registrants type, and the I_T nexus is the last remaining
+ * registered I_T nexus, then the device server shall also release the
+ * persistent reservation.
+ */
+ if (!list_empty(&dev->t10_pr.registration_list) &&
+ ((pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
+ (pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) {
+ dev->dev_pr_res_holder =
+ list_entry(dev->t10_pr.registration_list.next,
+ struct t10_pr_registration, pr_reg_list);
+ dev->dev_pr_res_holder->pr_res_type = pr_res_type;
+ dev->dev_pr_res_holder->pr_res_scope = pr_res_scope;
+ dev->dev_pr_res_holder->pr_res_holder = 1;
+ }
+ spin_unlock(&dev->t10_pr.registration_lock);
+out:
+ if (!dev->dev_pr_res_holder) {
+ pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared"
+ " reservation holder TYPE: %s ALL_TG_PT: %d\n",
+ tfo->get_fabric_name(), (explicit) ? "explicit" :
+ "implicit", core_scsi3_pr_dump_type(pr_res_type),
+ (pr_reg->pr_reg_all_tg_pt) ? 1 : 0);
+ }
pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n",
tfo->get_fabric_name(), se_nacl->initiatorname,
i_buf);
@@ -2532,7 +2576,7 @@ core_scsi3_emulate_pro_release(struct se_cmd *cmd, int type, int scope,
* server shall not establish a unit attention condition.
*/
__core_scsi3_complete_pro_release(dev, se_sess->se_node_acl,
- pr_reg, 1);
+ pr_reg, 1, 0);
spin_unlock(&dev->dev_reservation_lock);
@@ -2620,7 +2664,7 @@ core_scsi3_emulate_pro_clear(struct se_cmd *cmd, u64 res_key)
if (pr_res_holder) {
struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
__core_scsi3_complete_pro_release(dev, pr_res_nacl,
- pr_res_holder, 0);
+ pr_res_holder, 0, 0);
}
spin_unlock(&dev->dev_reservation_lock);
/*
@@ -2679,7 +2723,7 @@ static void __core_scsi3_complete_pro_preempt(
*/
if (dev->dev_pr_res_holder)
__core_scsi3_complete_pro_release(dev, nacl,
- dev->dev_pr_res_holder, 0);
+ dev->dev_pr_res_holder, 0, 0);
dev->dev_pr_res_holder = pr_reg;
pr_reg->pr_res_holder = 1;
@@ -2924,8 +2968,8 @@ core_scsi3_pro_preempt(struct se_cmd *cmd, int type, int scope, u64 res_key,
*/
if (pr_reg_n != pr_res_holder)
__core_scsi3_complete_pro_release(dev,
- pr_res_holder->pr_reg_nacl,
- dev->dev_pr_res_holder, 0);
+ pr_res_holder->pr_reg_nacl,
+ dev->dev_pr_res_holder, 0, 0);
/*
* b) Remove the registrations for all I_T nexuses identified
* by the SERVICE ACTION RESERVATION KEY field, except the
@@ -3059,7 +3103,7 @@ core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key,
struct t10_reservation *pr_tmpl = &dev->t10_pr;
unsigned char *buf;
unsigned char *initiator_str;
- char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN];
+ char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN];
u32 tid_len, tmp_tid_len;
int new_reg = 0, type, scope, matching_iname;
sense_reason_t ret;
@@ -3071,7 +3115,6 @@ core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key,
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
}
- memset(dest_iport, 0, 64);
memset(i_buf, 0, PR_REG_ISID_ID_LEN);
se_tpg = se_sess->se_tpg;
tf_ops = se_tpg->se_tpg_tfo;
@@ -3389,7 +3432,7 @@ after_iport_check:
* holder (i.e., the I_T nexus on which the
*/
__core_scsi3_complete_pro_release(dev, pr_res_nacl,
- dev->dev_pr_res_holder, 0);
+ dev->dev_pr_res_holder, 0, 0);
/*
* g) Move the persistent reservation to the specified I_T nexus using
* the same scope and type as the persistent reservation released in
@@ -3837,7 +3880,8 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd)
unsigned char *buf;
u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len;
u32 off = 8; /* off into first Full Status descriptor */
- int format_code = 0;
+ int format_code = 0, pr_res_type = 0, pr_res_scope = 0;
+ bool all_reg = false;
if (cmd->data_length < 8) {
pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u"
@@ -3854,6 +3898,19 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd)
buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff);
buf[3] = (dev->t10_pr.pr_generation & 0xff);
+ spin_lock(&dev->dev_reservation_lock);
+ if (dev->dev_pr_res_holder) {
+ struct t10_pr_registration *pr_holder = dev->dev_pr_res_holder;
+
+ if (pr_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG ||
+ pr_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG) {
+ all_reg = true;
+ pr_res_type = pr_holder->pr_res_type;
+ pr_res_scope = pr_holder->pr_res_scope;
+ }
+ }
+ spin_unlock(&dev->dev_reservation_lock);
+
spin_lock(&pr_tmpl->registration_lock);
list_for_each_entry_safe(pr_reg, pr_reg_tmp,
&pr_tmpl->registration_list, pr_reg_list) {
@@ -3901,14 +3958,20 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd)
* reservation holder for PR_HOLDER bit.
*
* Also, if this registration is the reservation
- * holder, fill in SCOPE and TYPE in the next byte.
+ * holder or there is an All Registrants reservation
+ * active, fill in SCOPE and TYPE in the next byte.
*/
if (pr_reg->pr_res_holder) {
buf[off++] |= 0x01;
buf[off++] = (pr_reg->pr_res_scope & 0xf0) |
(pr_reg->pr_res_type & 0x0f);
- } else
+ } else if (all_reg) {
+ buf[off++] |= 0x01;
+ buf[off++] = (pr_res_scope & 0xf0) |
+ (pr_res_type & 0x0f);
+ } else {
off += 2;
+ }
off += 4; /* Skip over reserved area */
/*
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index 7c8291f0bbbc..74873e42cf7e 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -44,6 +44,7 @@
#include <target/target_core_base.h>
#include <target/target_core_backend.h>
+#include <target/target_core_backend_configfs.h>
#include "target_core_alua.h"
#include "target_core_pscsi.h"
@@ -1165,6 +1166,26 @@ static void pscsi_req_done(struct request *req, int uptodate)
kfree(pt);
}
+DEF_TB_DEV_ATTRIB_RO(pscsi, hw_pi_prot_type);
+TB_DEV_ATTR_RO(pscsi, hw_pi_prot_type);
+
+DEF_TB_DEV_ATTRIB_RO(pscsi, hw_block_size);
+TB_DEV_ATTR_RO(pscsi, hw_block_size);
+
+DEF_TB_DEV_ATTRIB_RO(pscsi, hw_max_sectors);
+TB_DEV_ATTR_RO(pscsi, hw_max_sectors);
+
+DEF_TB_DEV_ATTRIB_RO(pscsi, hw_queue_depth);
+TB_DEV_ATTR_RO(pscsi, hw_queue_depth);
+
+static struct configfs_attribute *pscsi_backend_dev_attrs[] = {
+ &pscsi_dev_attrib_hw_pi_prot_type.attr,
+ &pscsi_dev_attrib_hw_block_size.attr,
+ &pscsi_dev_attrib_hw_max_sectors.attr,
+ &pscsi_dev_attrib_hw_queue_depth.attr,
+ NULL,
+};
+
static struct se_subsystem_api pscsi_template = {
.name = "pscsi",
.owner = THIS_MODULE,
@@ -1185,6 +1206,11 @@ static struct se_subsystem_api pscsi_template = {
static int __init pscsi_module_init(void)
{
+ struct target_backend_cits *tbc = &pscsi_template.tb_cits;
+
+ target_core_setup_sub_cits(&pscsi_template);
+ tbc->tb_dev_attrib_cit.ct_attrs = pscsi_backend_dev_attrs;
+
return transport_subsystem_register(&pscsi_template);
}
diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c
index b920db3388cd..60ebd170a561 100644
--- a/drivers/target/target_core_rd.c
+++ b/drivers/target/target_core_rd.c
@@ -34,6 +34,7 @@
#include <target/target_core_base.h>
#include <target/target_core_backend.h>
+#include <target/target_core_backend_configfs.h>
#include "target_core_rd.h"
@@ -632,6 +633,42 @@ rd_parse_cdb(struct se_cmd *cmd)
return sbc_parse_cdb(cmd, &rd_sbc_ops);
}
+DEF_TB_DEFAULT_ATTRIBS(rd_mcp);
+
+static struct configfs_attribute *rd_mcp_backend_dev_attrs[] = {
+ &rd_mcp_dev_attrib_emulate_model_alias.attr,
+ &rd_mcp_dev_attrib_emulate_dpo.attr,
+ &rd_mcp_dev_attrib_emulate_fua_write.attr,
+ &rd_mcp_dev_attrib_emulate_fua_read.attr,
+ &rd_mcp_dev_attrib_emulate_write_cache.attr,
+ &rd_mcp_dev_attrib_emulate_ua_intlck_ctrl.attr,
+ &rd_mcp_dev_attrib_emulate_tas.attr,
+ &rd_mcp_dev_attrib_emulate_tpu.attr,
+ &rd_mcp_dev_attrib_emulate_tpws.attr,
+ &rd_mcp_dev_attrib_emulate_caw.attr,
+ &rd_mcp_dev_attrib_emulate_3pc.attr,
+ &rd_mcp_dev_attrib_pi_prot_type.attr,
+ &rd_mcp_dev_attrib_hw_pi_prot_type.attr,
+ &rd_mcp_dev_attrib_pi_prot_format.attr,
+ &rd_mcp_dev_attrib_enforce_pr_isids.attr,
+ &rd_mcp_dev_attrib_is_nonrot.attr,
+ &rd_mcp_dev_attrib_emulate_rest_reord.attr,
+ &rd_mcp_dev_attrib_force_pr_aptpl.attr,
+ &rd_mcp_dev_attrib_hw_block_size.attr,
+ &rd_mcp_dev_attrib_block_size.attr,
+ &rd_mcp_dev_attrib_hw_max_sectors.attr,
+ &rd_mcp_dev_attrib_fabric_max_sectors.attr,
+ &rd_mcp_dev_attrib_optimal_sectors.attr,
+ &rd_mcp_dev_attrib_hw_queue_depth.attr,
+ &rd_mcp_dev_attrib_queue_depth.attr,
+ &rd_mcp_dev_attrib_max_unmap_lba_count.attr,
+ &rd_mcp_dev_attrib_max_unmap_block_desc_count.attr,
+ &rd_mcp_dev_attrib_unmap_granularity.attr,
+ &rd_mcp_dev_attrib_unmap_granularity_alignment.attr,
+ &rd_mcp_dev_attrib_max_write_same_len.attr,
+ NULL,
+};
+
static struct se_subsystem_api rd_mcp_template = {
.name = "rd_mcp",
.inquiry_prod = "RAMDISK-MCP",
@@ -653,8 +690,12 @@ static struct se_subsystem_api rd_mcp_template = {
int __init rd_module_init(void)
{
+ struct target_backend_cits *tbc = &rd_mcp_template.tb_cits;
int ret;
+ target_core_setup_sub_cits(&rd_mcp_template);
+ tbc->tb_dev_attrib_cit.ct_attrs = rd_mcp_backend_dev_attrs;
+
ret = transport_subsystem_register(&rd_mcp_template);
if (ret < 0) {
return ret;
diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c
index 9a1b314f6482..8bfa61c9693d 100644
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -28,6 +28,8 @@
#include <target/target_core_base.h>
#include <target/target_core_fabric.h>
#include <target/target_core_backend.h>
+#include <target/target_core_backend_configfs.h>
+
#include <linux/target_core_user.h>
/*
@@ -1092,6 +1094,42 @@ tcmu_parse_cdb(struct se_cmd *cmd)
return ret;
}
+DEF_TB_DEFAULT_ATTRIBS(tcmu);
+
+static struct configfs_attribute *tcmu_backend_dev_attrs[] = {
+ &tcmu_dev_attrib_emulate_model_alias.attr,
+ &tcmu_dev_attrib_emulate_dpo.attr,
+ &tcmu_dev_attrib_emulate_fua_write.attr,
+ &tcmu_dev_attrib_emulate_fua_read.attr,
+ &tcmu_dev_attrib_emulate_write_cache.attr,
+ &tcmu_dev_attrib_emulate_ua_intlck_ctrl.attr,
+ &tcmu_dev_attrib_emulate_tas.attr,
+ &tcmu_dev_attrib_emulate_tpu.attr,
+ &tcmu_dev_attrib_emulate_tpws.attr,
+ &tcmu_dev_attrib_emulate_caw.attr,
+ &tcmu_dev_attrib_emulate_3pc.attr,
+ &tcmu_dev_attrib_pi_prot_type.attr,
+ &tcmu_dev_attrib_hw_pi_prot_type.attr,
+ &tcmu_dev_attrib_pi_prot_format.attr,
+ &tcmu_dev_attrib_enforce_pr_isids.attr,
+ &tcmu_dev_attrib_is_nonrot.attr,
+ &tcmu_dev_attrib_emulate_rest_reord.attr,
+ &tcmu_dev_attrib_force_pr_aptpl.attr,
+ &tcmu_dev_attrib_hw_block_size.attr,
+ &tcmu_dev_attrib_block_size.attr,
+ &tcmu_dev_attrib_hw_max_sectors.attr,
+ &tcmu_dev_attrib_fabric_max_sectors.attr,
+ &tcmu_dev_attrib_optimal_sectors.attr,
+ &tcmu_dev_attrib_hw_queue_depth.attr,
+ &tcmu_dev_attrib_queue_depth.attr,
+ &tcmu_dev_attrib_max_unmap_lba_count.attr,
+ &tcmu_dev_attrib_max_unmap_block_desc_count.attr,
+ &tcmu_dev_attrib_unmap_granularity.attr,
+ &tcmu_dev_attrib_unmap_granularity_alignment.attr,
+ &tcmu_dev_attrib_max_write_same_len.attr,
+ NULL,
+};
+
static struct se_subsystem_api tcmu_template = {
.name = "user",
.inquiry_prod = "USER",
@@ -1112,6 +1150,7 @@ static struct se_subsystem_api tcmu_template = {
static int __init tcmu_module_init(void)
{
+ struct target_backend_cits *tbc = &tcmu_template.tb_cits;
int ret;
BUILD_BUG_ON((sizeof(struct tcmu_cmd_entry) % TCMU_OP_ALIGN_SIZE) != 0);
@@ -1134,6 +1173,9 @@ static int __init tcmu_module_init(void)
goto out_unreg_device;
}
+ target_core_setup_sub_cits(&tcmu_template);
+ tbc->tb_dev_attrib_cit.ct_attrs = tcmu_backend_dev_attrs;
+
ret = transport_subsystem_register(&tcmu_template);
if (ret)
goto out_unreg_genl;