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isert-scst: Introduce the function isert_setup_id()

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Introduce the function isert_setup_id(). This function creates and sets up
an RDMA CM ID. Move the isert_portal_listen() call into isert_portal_create().

Signed-off-by: Chesnokov Gleb <Chesnokov.G@raidix.com>
[ bvanassche: edited patch description and dropped support for older kernel
  versions in the PRINT_INFO() statement ]


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@9481 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2021-07-12 03:06:25 +00:00
parent 6cfbb697fd
commit 5d808c5432
2 changed files with 71 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
iscsi-scst/kernel/isert-scst/iser.h
View File

@@ -289,7 +289,7 @@ extern struct kmem_cache *isert_cmnd_cache;
extern struct kmem_cache *isert_conn_cache;
/* iser portal */
struct isert_portal *isert_portal_create(void);
struct isert_portal *isert_portal_create(struct sockaddr *sa, size_t addr_len);
int isert_portal_listen(struct isert_portal *portal,
struct sockaddr *sa,
size_t addr_len);

101
iscsi-scst/kernel/isert-scst/iser_rdma.c
View File

@@ -54,6 +54,8 @@
static DEFINE_MUTEX(dev_list_mutex);
static void isert_portal_free(struct isert_portal *portal);
static struct rdma_cm_id *
isert_setup_id(struct isert_portal *portal);
static int isert_num_recv_posted_on_err(struct ib_recv_wr *first_ib_wr,
BAD_WR_MODIFIER struct ib_recv_wr *bad_wr)
@@ -1781,10 +1783,69 @@ out:
return err;
}
static struct rdma_cm_id *
isert_setup_id(struct isert_portal *portal)
{
struct rdma_cm_id *id;
struct sockaddr *sa;
int ret;
sa = (struct sockaddr *)&portal->addr;
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 0, 0) && \
(!defined(RHEL_MAJOR) || RHEL_MAJOR -0 <= 5)
id = rdma_create_id(isert_cm_evt_handler, portal, RDMA_PS_TCP);
#elif !RDMA_CREATE_ID_TAKES_NET_ARG
id = rdma_create_id(isert_cm_evt_handler, portal, RDMA_PS_TCP,
IB_QPT_RC);
#else
id = rdma_create_id(iscsi_net_ns, isert_cm_evt_handler, portal,
RDMA_PS_TCP, IB_QPT_RC);
#endif
if (IS_ERR(id)) {
ret = PTR_ERR(id);
PRINT_ERROR("Failed to create rdma id, err:%d", ret);
goto out;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0)
/*
* Allow both IPv4 and IPv6 sockets to bind a single port
* at the same time.
*/
ret = rdma_set_afonly(id, 1);
if (ret) {
PRINT_ERROR("Failed to set afonly, err:%d", ret);
goto out_id;
}
#endif
ret = rdma_bind_addr(id, sa);
if (ret) {
PRINT_ERROR("Failed to bind rdma addr, err:%d", ret);
goto out_id;
}
ret = rdma_listen(id, ISER_LISTEN_BACKLOG);
if (ret) {
PRINT_ERROR("Failed rdma listen, err:%d", ret);
goto out_id;
}
PRINT_INFO("iser portal with cm_id %p listens on %pISpc", id, &sa);
return id;
out_id:
rdma_destroy_id(id);
out:
return ERR_PTR(ret);
}
/* create a portal, after listening starts all events
* are received in isert_cm_evt_handler()
*/
struct isert_portal *isert_portal_create(void)
struct isert_portal *isert_portal_create(struct sockaddr *sa, size_t addr_len)
{
struct isert_portal *portal;
struct rdma_cm_id *cm_id;
@@ -1803,30 +1864,20 @@ struct isert_portal *isert_portal_create(void)
goto err_alloc;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 0, 0) && \
(!defined(RHEL_MAJOR) || RHEL_MAJOR -0 <= 5)
cm_id = rdma_create_id(isert_cm_evt_handler, portal, RDMA_PS_TCP);
#elif !RDMA_CREATE_ID_TAKES_NET_ARG
cm_id = rdma_create_id(isert_cm_evt_handler, portal, RDMA_PS_TCP,
IB_QPT_RC);
#else
cm_id = rdma_create_id(iscsi_net_ns, isert_cm_evt_handler, portal,
RDMA_PS_TCP, IB_QPT_RC);
#endif
INIT_LIST_HEAD(&portal->conn_list);
isert_portal_list_add(portal);
memcpy(&portal->addr, sa, addr_len);
cm_id = isert_setup_id(portal);
if (IS_ERR(cm_id)) {
err = PTR_ERR(cm_id);
PRINT_ERROR("Failed to create rdma id, err:%d", err);
goto create_id_err;
}
portal->cm_id = cm_id;
INIT_LIST_HEAD(&portal->conn_list);
isert_portal_list_add(portal);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0)
rdma_set_afonly(cm_id, 1);
#endif
PRINT_INFO("Created iser portal cm_id:%p", cm_id);
out:
return portal;
@@ -1938,17 +1989,5 @@ void isert_portal_release(struct isert_portal *portal)
struct isert_portal *isert_portal_start(struct sockaddr *sa, size_t addr_len)
{
struct isert_portal *portal;
int err;
portal = isert_portal_create();
if (IS_ERR(portal))
return portal;
err = isert_portal_listen(portal, sa, addr_len);
if (err) {
isert_portal_release(portal);
portal = ERR_PTR(err);
}
return portal;
return isert_portal_create(sa, addr_len);
}