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iser-target: Split some logic in isert_connect_request to routines

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Move login buffer alloc/free code to dedicated
routines and introduce isert_conn_init which
initializes the connection lists and locks.

Simplifies and cleans up the code a little bit.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Sagi Grimberg 2015-03-29 15:52:15 +03:00 committed by Nicholas Bellinger
parent cf8ae95823
commit ae9ea9ed38
1 changed files with 88 additions and 66 deletions
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154
drivers/infiniband/ulp/isert/ib_isert.c
View file

@ -636,6 +636,86 @@ err:
return ret;
}
static void
isert_init_conn(struct isert_conn *isert_conn)
{
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);
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);
}
static void
isert_free_login_buf(struct isert_conn *isert_conn)
{
struct ib_device *ib_dev = isert_conn->conn_device->ib_device;
ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma,
ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE);
ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma,
ISCSI_DEF_MAX_RECV_SEG_LEN,
DMA_FROM_DEVICE);
kfree(isert_conn->login_buf);
}
static int
isert_alloc_login_buf(struct isert_conn *isert_conn,
struct ib_device *ib_dev)
{
int ret;
isert_conn->login_buf = kzalloc(ISCSI_DEF_MAX_RECV_SEG_LEN +
ISER_RX_LOGIN_SIZE, GFP_KERNEL);
if (!isert_conn->login_buf) {
isert_err("Unable to allocate isert_conn->login_buf\n");
return -ENOMEM;
}
isert_conn->login_req_buf = isert_conn->login_buf;
isert_conn->login_rsp_buf = isert_conn->login_buf +
ISCSI_DEF_MAX_RECV_SEG_LEN;
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);
isert_conn->login_req_dma = ib_dma_map_single(ib_dev,
(void *)isert_conn->login_req_buf,
ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE);
ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma);
if (ret) {
isert_err("login_req_dma mapping error: %d\n", ret);
isert_conn->login_req_dma = 0;
goto out_login_buf;
}
isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev,
(void *)isert_conn->login_rsp_buf,
ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE);
ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma);
if (ret) {
isert_err("login_rsp_dma mapping error: %d\n", ret);
isert_conn->login_rsp_dma = 0;
goto out_req_dma_map;
}
return 0;
out_req_dma_map:
ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma,
ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE);
out_login_buf:
kfree(isert_conn->login_buf);
return ret;
}
static int
isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
{
@ -643,7 +723,6 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
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;
spin_lock_bh(&np->np_thread_lock);
@ -658,60 +737,15 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
cma_id, cma_id->context);
isert_conn = kzalloc(sizeof(struct isert_conn), GFP_KERNEL);
if (!isert_conn) {
isert_err("Unable to allocate isert_conn\n");
if (!isert_conn)
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);
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);
isert_init_conn(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) {
isert_err("Unable to allocate isert_conn->login_buf\n");
ret = -ENOMEM;
ret = isert_alloc_login_buf(isert_conn, cma_id->device);
if (ret)
goto out;
}
isert_conn->login_req_buf = isert_conn->login_buf;
isert_conn->login_rsp_buf = isert_conn->login_buf +
ISCSI_DEF_MAX_RECV_SEG_LEN;
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);
isert_conn->login_req_dma = ib_dma_map_single(ib_dev,
(void *)isert_conn->login_req_buf,
ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE);
ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma);
if (ret) {
isert_err("ib_dma_mapping_error failed for login_req_dma: %d\n",
ret);
isert_conn->login_req_dma = 0;
goto out_login_buf;
}
isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev,
(void *)isert_conn->login_rsp_buf,
ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE);
ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma);
if (ret) {
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;
}
device = isert_device_get(cma_id);
if (IS_ERR(device)) {
@ -749,13 +783,7 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
out_conn_dev:
isert_device_put(device);
out_rsp_dma_map:
ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma,
ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE);
out_req_dma_map:
ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma,
ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE);
out_login_buf:
kfree(isert_conn->login_buf);
isert_free_login_buf(isert_conn);
out:
kfree(isert_conn);
rdma_reject(cma_id, NULL, 0);
@ -766,7 +794,6 @@ static void
isert_connect_release(struct isert_conn *isert_conn)
{
struct isert_device *device = isert_conn->conn_device;
struct ib_device *ib_dev = device->ib_device;
isert_dbg("conn %p\n", isert_conn);
@ -784,14 +811,9 @@ isert_connect_release(struct isert_conn *isert_conn)
ib_destroy_qp(isert_conn->conn_qp);
}
if (isert_conn->login_buf) {
ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma,
ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE);
ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma,
ISCSI_DEF_MAX_RECV_SEG_LEN,
DMA_FROM_DEVICE);
kfree(isert_conn->login_buf);
}
if (isert_conn->login_buf)
isert_free_login_buf(isert_conn);
kfree(isert_conn);
if (device)