forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1885 lines
47 KiB
1885 lines
47 KiB
/* |
|
* Copyright (c) 2005-2006 Intel Corporation. All rights reserved. |
|
* |
|
* This software is available to you under a choice of one of two |
|
* licenses. You may choose to be licensed under the terms of the GNU |
|
* General Public License (GPL) Version 2, available from the file |
|
* COPYING in the main directory of this source tree, or the |
|
* OpenIB.org BSD license below: |
|
* |
|
* Redistribution and use in source and binary forms, with or |
|
* without modification, are permitted provided that the following |
|
* conditions are met: |
|
* |
|
* - Redistributions of source code must retain the above |
|
* copyright notice, this list of conditions and the following |
|
* disclaimer. |
|
* |
|
* - Redistributions in binary form must reproduce the above |
|
* copyright notice, this list of conditions and the following |
|
* disclaimer in the documentation and/or other materials |
|
* provided with the distribution. |
|
* |
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
|
* SOFTWARE. |
|
*/ |
|
|
|
#include <linux/completion.h> |
|
#include <linux/file.h> |
|
#include <linux/mutex.h> |
|
#include <linux/poll.h> |
|
#include <linux/sched.h> |
|
#include <linux/idr.h> |
|
#include <linux/in.h> |
|
#include <linux/in6.h> |
|
#include <linux/miscdevice.h> |
|
#include <linux/slab.h> |
|
#include <linux/sysctl.h> |
|
#include <linux/module.h> |
|
#include <linux/nsproxy.h> |
|
|
|
#include <linux/nospec.h> |
|
|
|
#include <rdma/rdma_user_cm.h> |
|
#include <rdma/ib_marshall.h> |
|
#include <rdma/rdma_cm.h> |
|
#include <rdma/rdma_cm_ib.h> |
|
#include <rdma/ib_addr.h> |
|
#include <rdma/ib.h> |
|
#include <rdma/ib_cm.h> |
|
#include <rdma/rdma_netlink.h> |
|
#include "core_priv.h" |
|
|
|
MODULE_AUTHOR("Sean Hefty"); |
|
MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access"); |
|
MODULE_LICENSE("Dual BSD/GPL"); |
|
|
|
static unsigned int max_backlog = 1024; |
|
|
|
static struct ctl_table_header *ucma_ctl_table_hdr; |
|
static struct ctl_table ucma_ctl_table[] = { |
|
{ |
|
.procname = "max_backlog", |
|
.data = &max_backlog, |
|
.maxlen = sizeof max_backlog, |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ } |
|
}; |
|
|
|
struct ucma_file { |
|
struct mutex mut; |
|
struct file *filp; |
|
struct list_head ctx_list; |
|
struct list_head event_list; |
|
wait_queue_head_t poll_wait; |
|
}; |
|
|
|
struct ucma_context { |
|
u32 id; |
|
struct completion comp; |
|
refcount_t ref; |
|
int events_reported; |
|
atomic_t backlog; |
|
|
|
struct ucma_file *file; |
|
struct rdma_cm_id *cm_id; |
|
struct mutex mutex; |
|
u64 uid; |
|
|
|
struct list_head list; |
|
struct work_struct close_work; |
|
}; |
|
|
|
struct ucma_multicast { |
|
struct ucma_context *ctx; |
|
u32 id; |
|
int events_reported; |
|
|
|
u64 uid; |
|
u8 join_state; |
|
struct sockaddr_storage addr; |
|
}; |
|
|
|
struct ucma_event { |
|
struct ucma_context *ctx; |
|
struct ucma_context *conn_req_ctx; |
|
struct ucma_multicast *mc; |
|
struct list_head list; |
|
struct rdma_ucm_event_resp resp; |
|
}; |
|
|
|
static DEFINE_XARRAY_ALLOC(ctx_table); |
|
static DEFINE_XARRAY_ALLOC(multicast_table); |
|
|
|
static const struct file_operations ucma_fops; |
|
static int ucma_destroy_private_ctx(struct ucma_context *ctx); |
|
|
|
static inline struct ucma_context *_ucma_find_context(int id, |
|
struct ucma_file *file) |
|
{ |
|
struct ucma_context *ctx; |
|
|
|
ctx = xa_load(&ctx_table, id); |
|
if (!ctx) |
|
ctx = ERR_PTR(-ENOENT); |
|
else if (ctx->file != file) |
|
ctx = ERR_PTR(-EINVAL); |
|
return ctx; |
|
} |
|
|
|
static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) |
|
{ |
|
struct ucma_context *ctx; |
|
|
|
xa_lock(&ctx_table); |
|
ctx = _ucma_find_context(id, file); |
|
if (!IS_ERR(ctx)) |
|
if (!refcount_inc_not_zero(&ctx->ref)) |
|
ctx = ERR_PTR(-ENXIO); |
|
xa_unlock(&ctx_table); |
|
return ctx; |
|
} |
|
|
|
static void ucma_put_ctx(struct ucma_context *ctx) |
|
{ |
|
if (refcount_dec_and_test(&ctx->ref)) |
|
complete(&ctx->comp); |
|
} |
|
|
|
/* |
|
* Same as ucm_get_ctx but requires that ->cm_id->device is valid, eg that the |
|
* CM_ID is bound. |
|
*/ |
|
static struct ucma_context *ucma_get_ctx_dev(struct ucma_file *file, int id) |
|
{ |
|
struct ucma_context *ctx = ucma_get_ctx(file, id); |
|
|
|
if (IS_ERR(ctx)) |
|
return ctx; |
|
if (!ctx->cm_id->device) { |
|
ucma_put_ctx(ctx); |
|
return ERR_PTR(-EINVAL); |
|
} |
|
return ctx; |
|
} |
|
|
|
static void ucma_close_id(struct work_struct *work) |
|
{ |
|
struct ucma_context *ctx = container_of(work, struct ucma_context, close_work); |
|
|
|
/* once all inflight tasks are finished, we close all underlying |
|
* resources. The context is still alive till its explicit destryoing |
|
* by its creator. This puts back the xarray's reference. |
|
*/ |
|
ucma_put_ctx(ctx); |
|
wait_for_completion(&ctx->comp); |
|
/* No new events will be generated after destroying the id. */ |
|
rdma_destroy_id(ctx->cm_id); |
|
|
|
/* Reading the cm_id without holding a positive ref is not allowed */ |
|
ctx->cm_id = NULL; |
|
} |
|
|
|
static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) |
|
{ |
|
struct ucma_context *ctx; |
|
|
|
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); |
|
if (!ctx) |
|
return NULL; |
|
|
|
INIT_WORK(&ctx->close_work, ucma_close_id); |
|
init_completion(&ctx->comp); |
|
/* So list_del() will work if we don't do ucma_finish_ctx() */ |
|
INIT_LIST_HEAD(&ctx->list); |
|
ctx->file = file; |
|
mutex_init(&ctx->mutex); |
|
|
|
if (xa_alloc(&ctx_table, &ctx->id, NULL, xa_limit_32b, GFP_KERNEL)) { |
|
kfree(ctx); |
|
return NULL; |
|
} |
|
return ctx; |
|
} |
|
|
|
static void ucma_set_ctx_cm_id(struct ucma_context *ctx, |
|
struct rdma_cm_id *cm_id) |
|
{ |
|
refcount_set(&ctx->ref, 1); |
|
ctx->cm_id = cm_id; |
|
} |
|
|
|
static void ucma_finish_ctx(struct ucma_context *ctx) |
|
{ |
|
lockdep_assert_held(&ctx->file->mut); |
|
list_add_tail(&ctx->list, &ctx->file->ctx_list); |
|
xa_store(&ctx_table, ctx->id, ctx, GFP_KERNEL); |
|
} |
|
|
|
static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, |
|
struct rdma_conn_param *src) |
|
{ |
|
if (src->private_data_len) |
|
memcpy(dst->private_data, src->private_data, |
|
src->private_data_len); |
|
dst->private_data_len = src->private_data_len; |
|
dst->responder_resources =src->responder_resources; |
|
dst->initiator_depth = src->initiator_depth; |
|
dst->flow_control = src->flow_control; |
|
dst->retry_count = src->retry_count; |
|
dst->rnr_retry_count = src->rnr_retry_count; |
|
dst->srq = src->srq; |
|
dst->qp_num = src->qp_num; |
|
} |
|
|
|
static void ucma_copy_ud_event(struct ib_device *device, |
|
struct rdma_ucm_ud_param *dst, |
|
struct rdma_ud_param *src) |
|
{ |
|
if (src->private_data_len) |
|
memcpy(dst->private_data, src->private_data, |
|
src->private_data_len); |
|
dst->private_data_len = src->private_data_len; |
|
ib_copy_ah_attr_to_user(device, &dst->ah_attr, &src->ah_attr); |
|
dst->qp_num = src->qp_num; |
|
dst->qkey = src->qkey; |
|
} |
|
|
|
static struct ucma_event *ucma_create_uevent(struct ucma_context *ctx, |
|
struct rdma_cm_event *event) |
|
{ |
|
struct ucma_event *uevent; |
|
|
|
uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); |
|
if (!uevent) |
|
return NULL; |
|
|
|
uevent->ctx = ctx; |
|
switch (event->event) { |
|
case RDMA_CM_EVENT_MULTICAST_JOIN: |
|
case RDMA_CM_EVENT_MULTICAST_ERROR: |
|
uevent->mc = (struct ucma_multicast *) |
|
event->param.ud.private_data; |
|
uevent->resp.uid = uevent->mc->uid; |
|
uevent->resp.id = uevent->mc->id; |
|
break; |
|
default: |
|
uevent->resp.uid = ctx->uid; |
|
uevent->resp.id = ctx->id; |
|
break; |
|
} |
|
uevent->resp.event = event->event; |
|
uevent->resp.status = event->status; |
|
if (ctx->cm_id->qp_type == IB_QPT_UD) |
|
ucma_copy_ud_event(ctx->cm_id->device, &uevent->resp.param.ud, |
|
&event->param.ud); |
|
else |
|
ucma_copy_conn_event(&uevent->resp.param.conn, |
|
&event->param.conn); |
|
|
|
uevent->resp.ece.vendor_id = event->ece.vendor_id; |
|
uevent->resp.ece.attr_mod = event->ece.attr_mod; |
|
return uevent; |
|
} |
|
|
|
static int ucma_connect_event_handler(struct rdma_cm_id *cm_id, |
|
struct rdma_cm_event *event) |
|
{ |
|
struct ucma_context *listen_ctx = cm_id->context; |
|
struct ucma_context *ctx; |
|
struct ucma_event *uevent; |
|
|
|
if (!atomic_add_unless(&listen_ctx->backlog, -1, 0)) |
|
return -ENOMEM; |
|
ctx = ucma_alloc_ctx(listen_ctx->file); |
|
if (!ctx) |
|
goto err_backlog; |
|
ucma_set_ctx_cm_id(ctx, cm_id); |
|
|
|
uevent = ucma_create_uevent(listen_ctx, event); |
|
if (!uevent) |
|
goto err_alloc; |
|
uevent->conn_req_ctx = ctx; |
|
uevent->resp.id = ctx->id; |
|
|
|
ctx->cm_id->context = ctx; |
|
|
|
mutex_lock(&ctx->file->mut); |
|
ucma_finish_ctx(ctx); |
|
list_add_tail(&uevent->list, &ctx->file->event_list); |
|
mutex_unlock(&ctx->file->mut); |
|
wake_up_interruptible(&ctx->file->poll_wait); |
|
return 0; |
|
|
|
err_alloc: |
|
ucma_destroy_private_ctx(ctx); |
|
err_backlog: |
|
atomic_inc(&listen_ctx->backlog); |
|
/* Returning error causes the new ID to be destroyed */ |
|
return -ENOMEM; |
|
} |
|
|
|
static int ucma_event_handler(struct rdma_cm_id *cm_id, |
|
struct rdma_cm_event *event) |
|
{ |
|
struct ucma_event *uevent; |
|
struct ucma_context *ctx = cm_id->context; |
|
|
|
if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) |
|
return ucma_connect_event_handler(cm_id, event); |
|
|
|
/* |
|
* We ignore events for new connections until userspace has set their |
|
* context. This can only happen if an error occurs on a new connection |
|
* before the user accepts it. This is okay, since the accept will just |
|
* fail later. However, we do need to release the underlying HW |
|
* resources in case of a device removal event. |
|
*/ |
|
if (ctx->uid) { |
|
uevent = ucma_create_uevent(ctx, event); |
|
if (!uevent) |
|
return 0; |
|
|
|
mutex_lock(&ctx->file->mut); |
|
list_add_tail(&uevent->list, &ctx->file->event_list); |
|
mutex_unlock(&ctx->file->mut); |
|
wake_up_interruptible(&ctx->file->poll_wait); |
|
} |
|
|
|
if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) { |
|
xa_lock(&ctx_table); |
|
if (xa_load(&ctx_table, ctx->id) == ctx) |
|
queue_work(system_unbound_wq, &ctx->close_work); |
|
xa_unlock(&ctx_table); |
|
} |
|
return 0; |
|
} |
|
|
|
static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_get_event cmd; |
|
struct ucma_event *uevent; |
|
|
|
/* |
|
* Old 32 bit user space does not send the 4 byte padding in the |
|
* reserved field. We don't care, allow it to keep working. |
|
*/ |
|
if (out_len < sizeof(uevent->resp) - sizeof(uevent->resp.reserved) - |
|
sizeof(uevent->resp.ece)) |
|
return -ENOSPC; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
mutex_lock(&file->mut); |
|
while (list_empty(&file->event_list)) { |
|
mutex_unlock(&file->mut); |
|
|
|
if (file->filp->f_flags & O_NONBLOCK) |
|
return -EAGAIN; |
|
|
|
if (wait_event_interruptible(file->poll_wait, |
|
!list_empty(&file->event_list))) |
|
return -ERESTARTSYS; |
|
|
|
mutex_lock(&file->mut); |
|
} |
|
|
|
uevent = list_first_entry(&file->event_list, struct ucma_event, list); |
|
|
|
if (copy_to_user(u64_to_user_ptr(cmd.response), |
|
&uevent->resp, |
|
min_t(size_t, out_len, sizeof(uevent->resp)))) { |
|
mutex_unlock(&file->mut); |
|
return -EFAULT; |
|
} |
|
|
|
list_del(&uevent->list); |
|
uevent->ctx->events_reported++; |
|
if (uevent->mc) |
|
uevent->mc->events_reported++; |
|
if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) |
|
atomic_inc(&uevent->ctx->backlog); |
|
mutex_unlock(&file->mut); |
|
|
|
kfree(uevent); |
|
return 0; |
|
} |
|
|
|
static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type) |
|
{ |
|
switch (cmd->ps) { |
|
case RDMA_PS_TCP: |
|
*qp_type = IB_QPT_RC; |
|
return 0; |
|
case RDMA_PS_UDP: |
|
case RDMA_PS_IPOIB: |
|
*qp_type = IB_QPT_UD; |
|
return 0; |
|
case RDMA_PS_IB: |
|
*qp_type = cmd->qp_type; |
|
return 0; |
|
default: |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_create_id cmd; |
|
struct rdma_ucm_create_id_resp resp; |
|
struct ucma_context *ctx; |
|
struct rdma_cm_id *cm_id; |
|
enum ib_qp_type qp_type; |
|
int ret; |
|
|
|
if (out_len < sizeof(resp)) |
|
return -ENOSPC; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
ret = ucma_get_qp_type(&cmd, &qp_type); |
|
if (ret) |
|
return ret; |
|
|
|
ctx = ucma_alloc_ctx(file); |
|
if (!ctx) |
|
return -ENOMEM; |
|
|
|
ctx->uid = cmd.uid; |
|
cm_id = rdma_create_user_id(ucma_event_handler, ctx, cmd.ps, qp_type); |
|
if (IS_ERR(cm_id)) { |
|
ret = PTR_ERR(cm_id); |
|
goto err1; |
|
} |
|
ucma_set_ctx_cm_id(ctx, cm_id); |
|
|
|
resp.id = ctx->id; |
|
if (copy_to_user(u64_to_user_ptr(cmd.response), |
|
&resp, sizeof(resp))) { |
|
ucma_destroy_private_ctx(ctx); |
|
return -EFAULT; |
|
} |
|
|
|
mutex_lock(&file->mut); |
|
ucma_finish_ctx(ctx); |
|
mutex_unlock(&file->mut); |
|
return 0; |
|
|
|
err1: |
|
ucma_destroy_private_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static void ucma_cleanup_multicast(struct ucma_context *ctx) |
|
{ |
|
struct ucma_multicast *mc; |
|
unsigned long index; |
|
|
|
xa_for_each(&multicast_table, index, mc) { |
|
if (mc->ctx != ctx) |
|
continue; |
|
/* |
|
* At this point mc->ctx->ref is 0 so the mc cannot leave the |
|
* lock on the reader and this is enough serialization |
|
*/ |
|
xa_erase(&multicast_table, index); |
|
kfree(mc); |
|
} |
|
} |
|
|
|
static void ucma_cleanup_mc_events(struct ucma_multicast *mc) |
|
{ |
|
struct ucma_event *uevent, *tmp; |
|
|
|
rdma_lock_handler(mc->ctx->cm_id); |
|
mutex_lock(&mc->ctx->file->mut); |
|
list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { |
|
if (uevent->mc != mc) |
|
continue; |
|
|
|
list_del(&uevent->list); |
|
kfree(uevent); |
|
} |
|
mutex_unlock(&mc->ctx->file->mut); |
|
rdma_unlock_handler(mc->ctx->cm_id); |
|
} |
|
|
|
static int ucma_cleanup_ctx_events(struct ucma_context *ctx) |
|
{ |
|
int events_reported; |
|
struct ucma_event *uevent, *tmp; |
|
LIST_HEAD(list); |
|
|
|
/* Cleanup events not yet reported to the user.*/ |
|
mutex_lock(&ctx->file->mut); |
|
list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) { |
|
if (uevent->ctx != ctx) |
|
continue; |
|
|
|
if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST && |
|
xa_cmpxchg(&ctx_table, uevent->conn_req_ctx->id, |
|
uevent->conn_req_ctx, XA_ZERO_ENTRY, |
|
GFP_KERNEL) == uevent->conn_req_ctx) { |
|
list_move_tail(&uevent->list, &list); |
|
continue; |
|
} |
|
list_del(&uevent->list); |
|
kfree(uevent); |
|
} |
|
list_del(&ctx->list); |
|
events_reported = ctx->events_reported; |
|
mutex_unlock(&ctx->file->mut); |
|
|
|
/* |
|
* If this was a listening ID then any connections spawned from it that |
|
* have not been delivered to userspace are cleaned up too. Must be done |
|
* outside any locks. |
|
*/ |
|
list_for_each_entry_safe(uevent, tmp, &list, list) { |
|
ucma_destroy_private_ctx(uevent->conn_req_ctx); |
|
kfree(uevent); |
|
} |
|
return events_reported; |
|
} |
|
|
|
/* |
|
* When this is called the xarray must have a XA_ZERO_ENTRY in the ctx->id (ie |
|
* the ctx is not public to the user). This either because: |
|
* - ucma_finish_ctx() hasn't been called |
|
* - xa_cmpxchg() succeed to remove the entry (only one thread can succeed) |
|
*/ |
|
static int ucma_destroy_private_ctx(struct ucma_context *ctx) |
|
{ |
|
int events_reported; |
|
|
|
/* |
|
* Destroy the underlying cm_id. New work queuing is prevented now by |
|
* the removal from the xarray. Once the work is cancled ref will either |
|
* be 0 because the work ran to completion and consumed the ref from the |
|
* xarray, or it will be positive because we still have the ref from the |
|
* xarray. This can also be 0 in cases where cm_id was never set |
|
*/ |
|
cancel_work_sync(&ctx->close_work); |
|
if (refcount_read(&ctx->ref)) |
|
ucma_close_id(&ctx->close_work); |
|
|
|
events_reported = ucma_cleanup_ctx_events(ctx); |
|
ucma_cleanup_multicast(ctx); |
|
|
|
WARN_ON(xa_cmpxchg(&ctx_table, ctx->id, XA_ZERO_ENTRY, NULL, |
|
GFP_KERNEL) != NULL); |
|
mutex_destroy(&ctx->mutex); |
|
kfree(ctx); |
|
return events_reported; |
|
} |
|
|
|
static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_destroy_id cmd; |
|
struct rdma_ucm_destroy_id_resp resp; |
|
struct ucma_context *ctx; |
|
int ret = 0; |
|
|
|
if (out_len < sizeof(resp)) |
|
return -ENOSPC; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
xa_lock(&ctx_table); |
|
ctx = _ucma_find_context(cmd.id, file); |
|
if (!IS_ERR(ctx)) { |
|
if (__xa_cmpxchg(&ctx_table, ctx->id, ctx, XA_ZERO_ENTRY, |
|
GFP_KERNEL) != ctx) |
|
ctx = ERR_PTR(-ENOENT); |
|
} |
|
xa_unlock(&ctx_table); |
|
|
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
resp.events_reported = ucma_destroy_private_ctx(ctx); |
|
if (copy_to_user(u64_to_user_ptr(cmd.response), |
|
&resp, sizeof(resp))) |
|
ret = -EFAULT; |
|
|
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_bind_ip(struct ucma_file *file, const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_bind_ip cmd; |
|
struct ucma_context *ctx; |
|
int ret; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
if (!rdma_addr_size_in6(&cmd.addr)) |
|
return -EINVAL; |
|
|
|
ctx = ucma_get_ctx(file, cmd.id); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
mutex_lock(&ctx->mutex); |
|
ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); |
|
mutex_unlock(&ctx->mutex); |
|
|
|
ucma_put_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_bind(struct ucma_file *file, const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_bind cmd; |
|
struct ucma_context *ctx; |
|
int ret; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
if (cmd.reserved || !cmd.addr_size || |
|
cmd.addr_size != rdma_addr_size_kss(&cmd.addr)) |
|
return -EINVAL; |
|
|
|
ctx = ucma_get_ctx(file, cmd.id); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
mutex_lock(&ctx->mutex); |
|
ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); |
|
mutex_unlock(&ctx->mutex); |
|
ucma_put_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_resolve_ip(struct ucma_file *file, |
|
const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_resolve_ip cmd; |
|
struct ucma_context *ctx; |
|
int ret; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
if ((cmd.src_addr.sin6_family && !rdma_addr_size_in6(&cmd.src_addr)) || |
|
!rdma_addr_size_in6(&cmd.dst_addr)) |
|
return -EINVAL; |
|
|
|
ctx = ucma_get_ctx(file, cmd.id); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
mutex_lock(&ctx->mutex); |
|
ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, |
|
(struct sockaddr *) &cmd.dst_addr, cmd.timeout_ms); |
|
mutex_unlock(&ctx->mutex); |
|
ucma_put_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_resolve_addr(struct ucma_file *file, |
|
const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_resolve_addr cmd; |
|
struct ucma_context *ctx; |
|
int ret; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
if (cmd.reserved || |
|
(cmd.src_size && (cmd.src_size != rdma_addr_size_kss(&cmd.src_addr))) || |
|
!cmd.dst_size || (cmd.dst_size != rdma_addr_size_kss(&cmd.dst_addr))) |
|
return -EINVAL; |
|
|
|
ctx = ucma_get_ctx(file, cmd.id); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
mutex_lock(&ctx->mutex); |
|
ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, |
|
(struct sockaddr *) &cmd.dst_addr, cmd.timeout_ms); |
|
mutex_unlock(&ctx->mutex); |
|
ucma_put_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_resolve_route(struct ucma_file *file, |
|
const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_resolve_route cmd; |
|
struct ucma_context *ctx; |
|
int ret; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
ctx = ucma_get_ctx_dev(file, cmd.id); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
mutex_lock(&ctx->mutex); |
|
ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms); |
|
mutex_unlock(&ctx->mutex); |
|
ucma_put_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, |
|
struct rdma_route *route) |
|
{ |
|
struct rdma_dev_addr *dev_addr; |
|
|
|
resp->num_paths = route->num_paths; |
|
switch (route->num_paths) { |
|
case 0: |
|
dev_addr = &route->addr.dev_addr; |
|
rdma_addr_get_dgid(dev_addr, |
|
(union ib_gid *) &resp->ib_route[0].dgid); |
|
rdma_addr_get_sgid(dev_addr, |
|
(union ib_gid *) &resp->ib_route[0].sgid); |
|
resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
|
break; |
|
case 2: |
|
ib_copy_path_rec_to_user(&resp->ib_route[1], |
|
&route->path_rec[1]); |
|
fallthrough; |
|
case 1: |
|
ib_copy_path_rec_to_user(&resp->ib_route[0], |
|
&route->path_rec[0]); |
|
break; |
|
default: |
|
break; |
|
} |
|
} |
|
|
|
static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp, |
|
struct rdma_route *route) |
|
{ |
|
|
|
resp->num_paths = route->num_paths; |
|
switch (route->num_paths) { |
|
case 0: |
|
rdma_ip2gid((struct sockaddr *)&route->addr.dst_addr, |
|
(union ib_gid *)&resp->ib_route[0].dgid); |
|
rdma_ip2gid((struct sockaddr *)&route->addr.src_addr, |
|
(union ib_gid *)&resp->ib_route[0].sgid); |
|
resp->ib_route[0].pkey = cpu_to_be16(0xffff); |
|
break; |
|
case 2: |
|
ib_copy_path_rec_to_user(&resp->ib_route[1], |
|
&route->path_rec[1]); |
|
fallthrough; |
|
case 1: |
|
ib_copy_path_rec_to_user(&resp->ib_route[0], |
|
&route->path_rec[0]); |
|
break; |
|
default: |
|
break; |
|
} |
|
} |
|
|
|
static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp, |
|
struct rdma_route *route) |
|
{ |
|
struct rdma_dev_addr *dev_addr; |
|
|
|
dev_addr = &route->addr.dev_addr; |
|
rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid); |
|
rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid); |
|
} |
|
|
|
static ssize_t ucma_query_route(struct ucma_file *file, |
|
const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_query cmd; |
|
struct rdma_ucm_query_route_resp resp; |
|
struct ucma_context *ctx; |
|
struct sockaddr *addr; |
|
int ret = 0; |
|
|
|
if (out_len < offsetof(struct rdma_ucm_query_route_resp, ibdev_index)) |
|
return -ENOSPC; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
ctx = ucma_get_ctx(file, cmd.id); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
mutex_lock(&ctx->mutex); |
|
memset(&resp, 0, sizeof resp); |
|
addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
|
memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? |
|
sizeof(struct sockaddr_in) : |
|
sizeof(struct sockaddr_in6)); |
|
addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
|
memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? |
|
sizeof(struct sockaddr_in) : |
|
sizeof(struct sockaddr_in6)); |
|
if (!ctx->cm_id->device) |
|
goto out; |
|
|
|
resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; |
|
resp.ibdev_index = ctx->cm_id->device->index; |
|
resp.port_num = ctx->cm_id->port_num; |
|
|
|
if (rdma_cap_ib_sa(ctx->cm_id->device, ctx->cm_id->port_num)) |
|
ucma_copy_ib_route(&resp, &ctx->cm_id->route); |
|
else if (rdma_protocol_roce(ctx->cm_id->device, ctx->cm_id->port_num)) |
|
ucma_copy_iboe_route(&resp, &ctx->cm_id->route); |
|
else if (rdma_protocol_iwarp(ctx->cm_id->device, ctx->cm_id->port_num)) |
|
ucma_copy_iw_route(&resp, &ctx->cm_id->route); |
|
|
|
out: |
|
mutex_unlock(&ctx->mutex); |
|
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, |
|
min_t(size_t, out_len, sizeof(resp)))) |
|
ret = -EFAULT; |
|
|
|
ucma_put_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static void ucma_query_device_addr(struct rdma_cm_id *cm_id, |
|
struct rdma_ucm_query_addr_resp *resp) |
|
{ |
|
if (!cm_id->device) |
|
return; |
|
|
|
resp->node_guid = (__force __u64) cm_id->device->node_guid; |
|
resp->ibdev_index = cm_id->device->index; |
|
resp->port_num = cm_id->port_num; |
|
resp->pkey = (__force __u16) cpu_to_be16( |
|
ib_addr_get_pkey(&cm_id->route.addr.dev_addr)); |
|
} |
|
|
|
static ssize_t ucma_query_addr(struct ucma_context *ctx, |
|
void __user *response, int out_len) |
|
{ |
|
struct rdma_ucm_query_addr_resp resp; |
|
struct sockaddr *addr; |
|
int ret = 0; |
|
|
|
if (out_len < offsetof(struct rdma_ucm_query_addr_resp, ibdev_index)) |
|
return -ENOSPC; |
|
|
|
memset(&resp, 0, sizeof resp); |
|
|
|
addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
|
resp.src_size = rdma_addr_size(addr); |
|
memcpy(&resp.src_addr, addr, resp.src_size); |
|
|
|
addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
|
resp.dst_size = rdma_addr_size(addr); |
|
memcpy(&resp.dst_addr, addr, resp.dst_size); |
|
|
|
ucma_query_device_addr(ctx->cm_id, &resp); |
|
|
|
if (copy_to_user(response, &resp, min_t(size_t, out_len, sizeof(resp)))) |
|
ret = -EFAULT; |
|
|
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_query_path(struct ucma_context *ctx, |
|
void __user *response, int out_len) |
|
{ |
|
struct rdma_ucm_query_path_resp *resp; |
|
int i, ret = 0; |
|
|
|
if (out_len < sizeof(*resp)) |
|
return -ENOSPC; |
|
|
|
resp = kzalloc(out_len, GFP_KERNEL); |
|
if (!resp) |
|
return -ENOMEM; |
|
|
|
resp->num_paths = ctx->cm_id->route.num_paths; |
|
for (i = 0, out_len -= sizeof(*resp); |
|
i < resp->num_paths && out_len > sizeof(struct ib_path_rec_data); |
|
i++, out_len -= sizeof(struct ib_path_rec_data)) { |
|
struct sa_path_rec *rec = &ctx->cm_id->route.path_rec[i]; |
|
|
|
resp->path_data[i].flags = IB_PATH_GMP | IB_PATH_PRIMARY | |
|
IB_PATH_BIDIRECTIONAL; |
|
if (rec->rec_type == SA_PATH_REC_TYPE_OPA) { |
|
struct sa_path_rec ib; |
|
|
|
sa_convert_path_opa_to_ib(&ib, rec); |
|
ib_sa_pack_path(&ib, &resp->path_data[i].path_rec); |
|
|
|
} else { |
|
ib_sa_pack_path(rec, &resp->path_data[i].path_rec); |
|
} |
|
} |
|
|
|
if (copy_to_user(response, resp, struct_size(resp, path_data, i))) |
|
ret = -EFAULT; |
|
|
|
kfree(resp); |
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_query_gid(struct ucma_context *ctx, |
|
void __user *response, int out_len) |
|
{ |
|
struct rdma_ucm_query_addr_resp resp; |
|
struct sockaddr_ib *addr; |
|
int ret = 0; |
|
|
|
if (out_len < offsetof(struct rdma_ucm_query_addr_resp, ibdev_index)) |
|
return -ENOSPC; |
|
|
|
memset(&resp, 0, sizeof resp); |
|
|
|
ucma_query_device_addr(ctx->cm_id, &resp); |
|
|
|
addr = (struct sockaddr_ib *) &resp.src_addr; |
|
resp.src_size = sizeof(*addr); |
|
if (ctx->cm_id->route.addr.src_addr.ss_family == AF_IB) { |
|
memcpy(addr, &ctx->cm_id->route.addr.src_addr, resp.src_size); |
|
} else { |
|
addr->sib_family = AF_IB; |
|
addr->sib_pkey = (__force __be16) resp.pkey; |
|
rdma_read_gids(ctx->cm_id, (union ib_gid *)&addr->sib_addr, |
|
NULL); |
|
addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) |
|
&ctx->cm_id->route.addr.src_addr); |
|
} |
|
|
|
addr = (struct sockaddr_ib *) &resp.dst_addr; |
|
resp.dst_size = sizeof(*addr); |
|
if (ctx->cm_id->route.addr.dst_addr.ss_family == AF_IB) { |
|
memcpy(addr, &ctx->cm_id->route.addr.dst_addr, resp.dst_size); |
|
} else { |
|
addr->sib_family = AF_IB; |
|
addr->sib_pkey = (__force __be16) resp.pkey; |
|
rdma_read_gids(ctx->cm_id, NULL, |
|
(union ib_gid *)&addr->sib_addr); |
|
addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) |
|
&ctx->cm_id->route.addr.dst_addr); |
|
} |
|
|
|
if (copy_to_user(response, &resp, min_t(size_t, out_len, sizeof(resp)))) |
|
ret = -EFAULT; |
|
|
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_query(struct ucma_file *file, |
|
const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_query cmd; |
|
struct ucma_context *ctx; |
|
void __user *response; |
|
int ret; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
response = u64_to_user_ptr(cmd.response); |
|
ctx = ucma_get_ctx(file, cmd.id); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
mutex_lock(&ctx->mutex); |
|
switch (cmd.option) { |
|
case RDMA_USER_CM_QUERY_ADDR: |
|
ret = ucma_query_addr(ctx, response, out_len); |
|
break; |
|
case RDMA_USER_CM_QUERY_PATH: |
|
ret = ucma_query_path(ctx, response, out_len); |
|
break; |
|
case RDMA_USER_CM_QUERY_GID: |
|
ret = ucma_query_gid(ctx, response, out_len); |
|
break; |
|
default: |
|
ret = -ENOSYS; |
|
break; |
|
} |
|
mutex_unlock(&ctx->mutex); |
|
|
|
ucma_put_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static void ucma_copy_conn_param(struct rdma_cm_id *id, |
|
struct rdma_conn_param *dst, |
|
struct rdma_ucm_conn_param *src) |
|
{ |
|
dst->private_data = src->private_data; |
|
dst->private_data_len = src->private_data_len; |
|
dst->responder_resources =src->responder_resources; |
|
dst->initiator_depth = src->initiator_depth; |
|
dst->flow_control = src->flow_control; |
|
dst->retry_count = src->retry_count; |
|
dst->rnr_retry_count = src->rnr_retry_count; |
|
dst->srq = src->srq; |
|
dst->qp_num = src->qp_num & 0xFFFFFF; |
|
dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0; |
|
} |
|
|
|
static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_conn_param conn_param; |
|
struct rdma_ucm_ece ece = {}; |
|
struct rdma_ucm_connect cmd; |
|
struct ucma_context *ctx; |
|
size_t in_size; |
|
int ret; |
|
|
|
if (in_len < offsetofend(typeof(cmd), reserved)) |
|
return -EINVAL; |
|
in_size = min_t(size_t, in_len, sizeof(cmd)); |
|
if (copy_from_user(&cmd, inbuf, in_size)) |
|
return -EFAULT; |
|
|
|
if (!cmd.conn_param.valid) |
|
return -EINVAL; |
|
|
|
ctx = ucma_get_ctx_dev(file, cmd.id); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
|
if (offsetofend(typeof(cmd), ece) <= in_size) { |
|
ece.vendor_id = cmd.ece.vendor_id; |
|
ece.attr_mod = cmd.ece.attr_mod; |
|
} |
|
|
|
mutex_lock(&ctx->mutex); |
|
ret = rdma_connect_ece(ctx->cm_id, &conn_param, &ece); |
|
mutex_unlock(&ctx->mutex); |
|
ucma_put_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_listen cmd; |
|
struct ucma_context *ctx; |
|
int ret; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
ctx = ucma_get_ctx(file, cmd.id); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
if (cmd.backlog <= 0 || cmd.backlog > max_backlog) |
|
cmd.backlog = max_backlog; |
|
atomic_set(&ctx->backlog, cmd.backlog); |
|
|
|
mutex_lock(&ctx->mutex); |
|
ret = rdma_listen(ctx->cm_id, cmd.backlog); |
|
mutex_unlock(&ctx->mutex); |
|
ucma_put_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_accept cmd; |
|
struct rdma_conn_param conn_param; |
|
struct rdma_ucm_ece ece = {}; |
|
struct ucma_context *ctx; |
|
size_t in_size; |
|
int ret; |
|
|
|
if (in_len < offsetofend(typeof(cmd), reserved)) |
|
return -EINVAL; |
|
in_size = min_t(size_t, in_len, sizeof(cmd)); |
|
if (copy_from_user(&cmd, inbuf, in_size)) |
|
return -EFAULT; |
|
|
|
ctx = ucma_get_ctx_dev(file, cmd.id); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
if (offsetofend(typeof(cmd), ece) <= in_size) { |
|
ece.vendor_id = cmd.ece.vendor_id; |
|
ece.attr_mod = cmd.ece.attr_mod; |
|
} |
|
|
|
if (cmd.conn_param.valid) { |
|
ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
|
mutex_lock(&ctx->mutex); |
|
rdma_lock_handler(ctx->cm_id); |
|
ret = rdma_accept_ece(ctx->cm_id, &conn_param, &ece); |
|
if (!ret) { |
|
/* The uid must be set atomically with the handler */ |
|
ctx->uid = cmd.uid; |
|
} |
|
rdma_unlock_handler(ctx->cm_id); |
|
mutex_unlock(&ctx->mutex); |
|
} else { |
|
mutex_lock(&ctx->mutex); |
|
rdma_lock_handler(ctx->cm_id); |
|
ret = rdma_accept_ece(ctx->cm_id, NULL, &ece); |
|
rdma_unlock_handler(ctx->cm_id); |
|
mutex_unlock(&ctx->mutex); |
|
} |
|
ucma_put_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_reject cmd; |
|
struct ucma_context *ctx; |
|
int ret; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
if (!cmd.reason) |
|
cmd.reason = IB_CM_REJ_CONSUMER_DEFINED; |
|
|
|
switch (cmd.reason) { |
|
case IB_CM_REJ_CONSUMER_DEFINED: |
|
case IB_CM_REJ_VENDOR_OPTION_NOT_SUPPORTED: |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
ctx = ucma_get_ctx_dev(file, cmd.id); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
mutex_lock(&ctx->mutex); |
|
ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len, |
|
cmd.reason); |
|
mutex_unlock(&ctx->mutex); |
|
ucma_put_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_disconnect cmd; |
|
struct ucma_context *ctx; |
|
int ret; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
ctx = ucma_get_ctx_dev(file, cmd.id); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
mutex_lock(&ctx->mutex); |
|
ret = rdma_disconnect(ctx->cm_id); |
|
mutex_unlock(&ctx->mutex); |
|
ucma_put_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_init_qp_attr(struct ucma_file *file, |
|
const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_init_qp_attr cmd; |
|
struct ib_uverbs_qp_attr resp; |
|
struct ucma_context *ctx; |
|
struct ib_qp_attr qp_attr; |
|
int ret; |
|
|
|
if (out_len < sizeof(resp)) |
|
return -ENOSPC; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
if (cmd.qp_state > IB_QPS_ERR) |
|
return -EINVAL; |
|
|
|
ctx = ucma_get_ctx_dev(file, cmd.id); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
resp.qp_attr_mask = 0; |
|
memset(&qp_attr, 0, sizeof qp_attr); |
|
qp_attr.qp_state = cmd.qp_state; |
|
mutex_lock(&ctx->mutex); |
|
ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); |
|
mutex_unlock(&ctx->mutex); |
|
if (ret) |
|
goto out; |
|
|
|
ib_copy_qp_attr_to_user(ctx->cm_id->device, &resp, &qp_attr); |
|
if (copy_to_user(u64_to_user_ptr(cmd.response), |
|
&resp, sizeof(resp))) |
|
ret = -EFAULT; |
|
|
|
out: |
|
ucma_put_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static int ucma_set_option_id(struct ucma_context *ctx, int optname, |
|
void *optval, size_t optlen) |
|
{ |
|
int ret = 0; |
|
|
|
switch (optname) { |
|
case RDMA_OPTION_ID_TOS: |
|
if (optlen != sizeof(u8)) { |
|
ret = -EINVAL; |
|
break; |
|
} |
|
rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); |
|
break; |
|
case RDMA_OPTION_ID_REUSEADDR: |
|
if (optlen != sizeof(int)) { |
|
ret = -EINVAL; |
|
break; |
|
} |
|
ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0); |
|
break; |
|
case RDMA_OPTION_ID_AFONLY: |
|
if (optlen != sizeof(int)) { |
|
ret = -EINVAL; |
|
break; |
|
} |
|
ret = rdma_set_afonly(ctx->cm_id, *((int *) optval) ? 1 : 0); |
|
break; |
|
case RDMA_OPTION_ID_ACK_TIMEOUT: |
|
if (optlen != sizeof(u8)) { |
|
ret = -EINVAL; |
|
break; |
|
} |
|
ret = rdma_set_ack_timeout(ctx->cm_id, *((u8 *)optval)); |
|
break; |
|
default: |
|
ret = -ENOSYS; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int ucma_set_ib_path(struct ucma_context *ctx, |
|
struct ib_path_rec_data *path_data, size_t optlen) |
|
{ |
|
struct sa_path_rec sa_path; |
|
struct rdma_cm_event event; |
|
int ret; |
|
|
|
if (optlen % sizeof(*path_data)) |
|
return -EINVAL; |
|
|
|
for (; optlen; optlen -= sizeof(*path_data), path_data++) { |
|
if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | |
|
IB_PATH_BIDIRECTIONAL)) |
|
break; |
|
} |
|
|
|
if (!optlen) |
|
return -EINVAL; |
|
|
|
if (!ctx->cm_id->device) |
|
return -EINVAL; |
|
|
|
memset(&sa_path, 0, sizeof(sa_path)); |
|
|
|
sa_path.rec_type = SA_PATH_REC_TYPE_IB; |
|
ib_sa_unpack_path(path_data->path_rec, &sa_path); |
|
|
|
if (rdma_cap_opa_ah(ctx->cm_id->device, ctx->cm_id->port_num)) { |
|
struct sa_path_rec opa; |
|
|
|
sa_convert_path_ib_to_opa(&opa, &sa_path); |
|
mutex_lock(&ctx->mutex); |
|
ret = rdma_set_ib_path(ctx->cm_id, &opa); |
|
mutex_unlock(&ctx->mutex); |
|
} else { |
|
mutex_lock(&ctx->mutex); |
|
ret = rdma_set_ib_path(ctx->cm_id, &sa_path); |
|
mutex_unlock(&ctx->mutex); |
|
} |
|
if (ret) |
|
return ret; |
|
|
|
memset(&event, 0, sizeof event); |
|
event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; |
|
return ucma_event_handler(ctx->cm_id, &event); |
|
} |
|
|
|
static int ucma_set_option_ib(struct ucma_context *ctx, int optname, |
|
void *optval, size_t optlen) |
|
{ |
|
int ret; |
|
|
|
switch (optname) { |
|
case RDMA_OPTION_IB_PATH: |
|
ret = ucma_set_ib_path(ctx, optval, optlen); |
|
break; |
|
default: |
|
ret = -ENOSYS; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int ucma_set_option_level(struct ucma_context *ctx, int level, |
|
int optname, void *optval, size_t optlen) |
|
{ |
|
int ret; |
|
|
|
switch (level) { |
|
case RDMA_OPTION_ID: |
|
mutex_lock(&ctx->mutex); |
|
ret = ucma_set_option_id(ctx, optname, optval, optlen); |
|
mutex_unlock(&ctx->mutex); |
|
break; |
|
case RDMA_OPTION_IB: |
|
ret = ucma_set_option_ib(ctx, optname, optval, optlen); |
|
break; |
|
default: |
|
ret = -ENOSYS; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_set_option cmd; |
|
struct ucma_context *ctx; |
|
void *optval; |
|
int ret; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
if (unlikely(cmd.optlen > KMALLOC_MAX_SIZE)) |
|
return -EINVAL; |
|
|
|
ctx = ucma_get_ctx(file, cmd.id); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
optval = memdup_user(u64_to_user_ptr(cmd.optval), |
|
cmd.optlen); |
|
if (IS_ERR(optval)) { |
|
ret = PTR_ERR(optval); |
|
goto out; |
|
} |
|
|
|
ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, |
|
cmd.optlen); |
|
kfree(optval); |
|
|
|
out: |
|
ucma_put_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_notify cmd; |
|
struct ucma_context *ctx; |
|
int ret = -EINVAL; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
ctx = ucma_get_ctx(file, cmd.id); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
mutex_lock(&ctx->mutex); |
|
if (ctx->cm_id->device) |
|
ret = rdma_notify(ctx->cm_id, (enum ib_event_type)cmd.event); |
|
mutex_unlock(&ctx->mutex); |
|
|
|
ucma_put_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_process_join(struct ucma_file *file, |
|
struct rdma_ucm_join_mcast *cmd, int out_len) |
|
{ |
|
struct rdma_ucm_create_id_resp resp; |
|
struct ucma_context *ctx; |
|
struct ucma_multicast *mc; |
|
struct sockaddr *addr; |
|
int ret; |
|
u8 join_state; |
|
|
|
if (out_len < sizeof(resp)) |
|
return -ENOSPC; |
|
|
|
addr = (struct sockaddr *) &cmd->addr; |
|
if (cmd->addr_size != rdma_addr_size(addr)) |
|
return -EINVAL; |
|
|
|
if (cmd->join_flags == RDMA_MC_JOIN_FLAG_FULLMEMBER) |
|
join_state = BIT(FULLMEMBER_JOIN); |
|
else if (cmd->join_flags == RDMA_MC_JOIN_FLAG_SENDONLY_FULLMEMBER) |
|
join_state = BIT(SENDONLY_FULLMEMBER_JOIN); |
|
else |
|
return -EINVAL; |
|
|
|
ctx = ucma_get_ctx_dev(file, cmd->id); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
mc = kzalloc(sizeof(*mc), GFP_KERNEL); |
|
if (!mc) { |
|
ret = -ENOMEM; |
|
goto err_put_ctx; |
|
} |
|
|
|
mc->ctx = ctx; |
|
mc->join_state = join_state; |
|
mc->uid = cmd->uid; |
|
memcpy(&mc->addr, addr, cmd->addr_size); |
|
|
|
if (xa_alloc(&multicast_table, &mc->id, NULL, xa_limit_32b, |
|
GFP_KERNEL)) { |
|
ret = -ENOMEM; |
|
goto err_free_mc; |
|
} |
|
|
|
mutex_lock(&ctx->mutex); |
|
ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *)&mc->addr, |
|
join_state, mc); |
|
mutex_unlock(&ctx->mutex); |
|
if (ret) |
|
goto err_xa_erase; |
|
|
|
resp.id = mc->id; |
|
if (copy_to_user(u64_to_user_ptr(cmd->response), |
|
&resp, sizeof(resp))) { |
|
ret = -EFAULT; |
|
goto err_leave_multicast; |
|
} |
|
|
|
xa_store(&multicast_table, mc->id, mc, 0); |
|
|
|
ucma_put_ctx(ctx); |
|
return 0; |
|
|
|
err_leave_multicast: |
|
mutex_lock(&ctx->mutex); |
|
rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); |
|
mutex_unlock(&ctx->mutex); |
|
ucma_cleanup_mc_events(mc); |
|
err_xa_erase: |
|
xa_erase(&multicast_table, mc->id); |
|
err_free_mc: |
|
kfree(mc); |
|
err_put_ctx: |
|
ucma_put_ctx(ctx); |
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_join_ip_multicast(struct ucma_file *file, |
|
const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_join_ip_mcast cmd; |
|
struct rdma_ucm_join_mcast join_cmd; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
join_cmd.response = cmd.response; |
|
join_cmd.uid = cmd.uid; |
|
join_cmd.id = cmd.id; |
|
join_cmd.addr_size = rdma_addr_size_in6(&cmd.addr); |
|
if (!join_cmd.addr_size) |
|
return -EINVAL; |
|
|
|
join_cmd.join_flags = RDMA_MC_JOIN_FLAG_FULLMEMBER; |
|
memcpy(&join_cmd.addr, &cmd.addr, join_cmd.addr_size); |
|
|
|
return ucma_process_join(file, &join_cmd, out_len); |
|
} |
|
|
|
static ssize_t ucma_join_multicast(struct ucma_file *file, |
|
const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_join_mcast cmd; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
if (!rdma_addr_size_kss(&cmd.addr)) |
|
return -EINVAL; |
|
|
|
return ucma_process_join(file, &cmd, out_len); |
|
} |
|
|
|
static ssize_t ucma_leave_multicast(struct ucma_file *file, |
|
const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_destroy_id cmd; |
|
struct rdma_ucm_destroy_id_resp resp; |
|
struct ucma_multicast *mc; |
|
int ret = 0; |
|
|
|
if (out_len < sizeof(resp)) |
|
return -ENOSPC; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
xa_lock(&multicast_table); |
|
mc = xa_load(&multicast_table, cmd.id); |
|
if (!mc) |
|
mc = ERR_PTR(-ENOENT); |
|
else if (READ_ONCE(mc->ctx->file) != file) |
|
mc = ERR_PTR(-EINVAL); |
|
else if (!refcount_inc_not_zero(&mc->ctx->ref)) |
|
mc = ERR_PTR(-ENXIO); |
|
else |
|
__xa_erase(&multicast_table, mc->id); |
|
xa_unlock(&multicast_table); |
|
|
|
if (IS_ERR(mc)) { |
|
ret = PTR_ERR(mc); |
|
goto out; |
|
} |
|
|
|
mutex_lock(&mc->ctx->mutex); |
|
rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); |
|
mutex_unlock(&mc->ctx->mutex); |
|
|
|
ucma_cleanup_mc_events(mc); |
|
|
|
ucma_put_ctx(mc->ctx); |
|
resp.events_reported = mc->events_reported; |
|
kfree(mc); |
|
|
|
if (copy_to_user(u64_to_user_ptr(cmd.response), |
|
&resp, sizeof(resp))) |
|
ret = -EFAULT; |
|
out: |
|
return ret; |
|
} |
|
|
|
static ssize_t ucma_migrate_id(struct ucma_file *new_file, |
|
const char __user *inbuf, |
|
int in_len, int out_len) |
|
{ |
|
struct rdma_ucm_migrate_id cmd; |
|
struct rdma_ucm_migrate_resp resp; |
|
struct ucma_event *uevent, *tmp; |
|
struct ucma_context *ctx; |
|
LIST_HEAD(event_list); |
|
struct fd f; |
|
struct ucma_file *cur_file; |
|
int ret = 0; |
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
|
return -EFAULT; |
|
|
|
/* Get current fd to protect against it being closed */ |
|
f = fdget(cmd.fd); |
|
if (!f.file) |
|
return -ENOENT; |
|
if (f.file->f_op != &ucma_fops) { |
|
ret = -EINVAL; |
|
goto file_put; |
|
} |
|
cur_file = f.file->private_data; |
|
|
|
/* Validate current fd and prevent destruction of id. */ |
|
ctx = ucma_get_ctx(cur_file, cmd.id); |
|
if (IS_ERR(ctx)) { |
|
ret = PTR_ERR(ctx); |
|
goto file_put; |
|
} |
|
|
|
rdma_lock_handler(ctx->cm_id); |
|
/* |
|
* ctx->file can only be changed under the handler & xa_lock. xa_load() |
|
* must be checked again to ensure the ctx hasn't begun destruction |
|
* since the ucma_get_ctx(). |
|
*/ |
|
xa_lock(&ctx_table); |
|
if (_ucma_find_context(cmd.id, cur_file) != ctx) { |
|
xa_unlock(&ctx_table); |
|
ret = -ENOENT; |
|
goto err_unlock; |
|
} |
|
ctx->file = new_file; |
|
xa_unlock(&ctx_table); |
|
|
|
mutex_lock(&cur_file->mut); |
|
list_del(&ctx->list); |
|
/* |
|
* At this point lock_handler() prevents addition of new uevents for |
|
* this ctx. |
|
*/ |
|
list_for_each_entry_safe(uevent, tmp, &cur_file->event_list, list) |
|
if (uevent->ctx == ctx) |
|
list_move_tail(&uevent->list, &event_list); |
|
resp.events_reported = ctx->events_reported; |
|
mutex_unlock(&cur_file->mut); |
|
|
|
mutex_lock(&new_file->mut); |
|
list_add_tail(&ctx->list, &new_file->ctx_list); |
|
list_splice_tail(&event_list, &new_file->event_list); |
|
mutex_unlock(&new_file->mut); |
|
|
|
if (copy_to_user(u64_to_user_ptr(cmd.response), |
|
&resp, sizeof(resp))) |
|
ret = -EFAULT; |
|
|
|
err_unlock: |
|
rdma_unlock_handler(ctx->cm_id); |
|
ucma_put_ctx(ctx); |
|
file_put: |
|
fdput(f); |
|
return ret; |
|
} |
|
|
|
static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, |
|
const char __user *inbuf, |
|
int in_len, int out_len) = { |
|
[RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, |
|
[RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, |
|
[RDMA_USER_CM_CMD_BIND_IP] = ucma_bind_ip, |
|
[RDMA_USER_CM_CMD_RESOLVE_IP] = ucma_resolve_ip, |
|
[RDMA_USER_CM_CMD_RESOLVE_ROUTE] = ucma_resolve_route, |
|
[RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, |
|
[RDMA_USER_CM_CMD_CONNECT] = ucma_connect, |
|
[RDMA_USER_CM_CMD_LISTEN] = ucma_listen, |
|
[RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, |
|
[RDMA_USER_CM_CMD_REJECT] = ucma_reject, |
|
[RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, |
|
[RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, |
|
[RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, |
|
[RDMA_USER_CM_CMD_GET_OPTION] = NULL, |
|
[RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, |
|
[RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, |
|
[RDMA_USER_CM_CMD_JOIN_IP_MCAST] = ucma_join_ip_multicast, |
|
[RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, |
|
[RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id, |
|
[RDMA_USER_CM_CMD_QUERY] = ucma_query, |
|
[RDMA_USER_CM_CMD_BIND] = ucma_bind, |
|
[RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, |
|
[RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast |
|
}; |
|
|
|
static ssize_t ucma_write(struct file *filp, const char __user *buf, |
|
size_t len, loff_t *pos) |
|
{ |
|
struct ucma_file *file = filp->private_data; |
|
struct rdma_ucm_cmd_hdr hdr; |
|
ssize_t ret; |
|
|
|
if (!ib_safe_file_access(filp)) { |
|
pr_err_once("ucma_write: process %d (%s) changed security contexts after opening file descriptor, this is not allowed.\n", |
|
task_tgid_vnr(current), current->comm); |
|
return -EACCES; |
|
} |
|
|
|
if (len < sizeof(hdr)) |
|
return -EINVAL; |
|
|
|
if (copy_from_user(&hdr, buf, sizeof(hdr))) |
|
return -EFAULT; |
|
|
|
if (hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) |
|
return -EINVAL; |
|
hdr.cmd = array_index_nospec(hdr.cmd, ARRAY_SIZE(ucma_cmd_table)); |
|
|
|
if (hdr.in + sizeof(hdr) > len) |
|
return -EINVAL; |
|
|
|
if (!ucma_cmd_table[hdr.cmd]) |
|
return -ENOSYS; |
|
|
|
ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); |
|
if (!ret) |
|
ret = len; |
|
|
|
return ret; |
|
} |
|
|
|
static __poll_t ucma_poll(struct file *filp, struct poll_table_struct *wait) |
|
{ |
|
struct ucma_file *file = filp->private_data; |
|
__poll_t mask = 0; |
|
|
|
poll_wait(filp, &file->poll_wait, wait); |
|
|
|
if (!list_empty(&file->event_list)) |
|
mask = EPOLLIN | EPOLLRDNORM; |
|
|
|
return mask; |
|
} |
|
|
|
/* |
|
* ucma_open() does not need the BKL: |
|
* |
|
* - no global state is referred to; |
|
* - there is no ioctl method to race against; |
|
* - no further module initialization is required for open to work |
|
* after the device is registered. |
|
*/ |
|
static int ucma_open(struct inode *inode, struct file *filp) |
|
{ |
|
struct ucma_file *file; |
|
|
|
file = kmalloc(sizeof *file, GFP_KERNEL); |
|
if (!file) |
|
return -ENOMEM; |
|
|
|
INIT_LIST_HEAD(&file->event_list); |
|
INIT_LIST_HEAD(&file->ctx_list); |
|
init_waitqueue_head(&file->poll_wait); |
|
mutex_init(&file->mut); |
|
|
|
filp->private_data = file; |
|
file->filp = filp; |
|
|
|
return stream_open(inode, filp); |
|
} |
|
|
|
static int ucma_close(struct inode *inode, struct file *filp) |
|
{ |
|
struct ucma_file *file = filp->private_data; |
|
|
|
/* |
|
* All paths that touch ctx_list or ctx_list starting from write() are |
|
* prevented by this being a FD release function. The list_add_tail() in |
|
* ucma_connect_event_handler() can run concurrently, however it only |
|
* adds to the list *after* a listening ID. By only reading the first of |
|
* the list, and relying on ucma_destroy_private_ctx() to block |
|
* ucma_connect_event_handler(), no additional locking is needed. |
|
*/ |
|
while (!list_empty(&file->ctx_list)) { |
|
struct ucma_context *ctx = list_first_entry( |
|
&file->ctx_list, struct ucma_context, list); |
|
|
|
WARN_ON(xa_cmpxchg(&ctx_table, ctx->id, ctx, XA_ZERO_ENTRY, |
|
GFP_KERNEL) != ctx); |
|
ucma_destroy_private_ctx(ctx); |
|
} |
|
kfree(file); |
|
return 0; |
|
} |
|
|
|
static const struct file_operations ucma_fops = { |
|
.owner = THIS_MODULE, |
|
.open = ucma_open, |
|
.release = ucma_close, |
|
.write = ucma_write, |
|
.poll = ucma_poll, |
|
.llseek = no_llseek, |
|
}; |
|
|
|
static struct miscdevice ucma_misc = { |
|
.minor = MISC_DYNAMIC_MINOR, |
|
.name = "rdma_cm", |
|
.nodename = "infiniband/rdma_cm", |
|
.mode = 0666, |
|
.fops = &ucma_fops, |
|
}; |
|
|
|
static int ucma_get_global_nl_info(struct ib_client_nl_info *res) |
|
{ |
|
res->abi = RDMA_USER_CM_ABI_VERSION; |
|
res->cdev = ucma_misc.this_device; |
|
return 0; |
|
} |
|
|
|
static struct ib_client rdma_cma_client = { |
|
.name = "rdma_cm", |
|
.get_global_nl_info = ucma_get_global_nl_info, |
|
}; |
|
MODULE_ALIAS_RDMA_CLIENT("rdma_cm"); |
|
|
|
static ssize_t show_abi_version(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
return sysfs_emit(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); |
|
} |
|
static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); |
|
|
|
static int __init ucma_init(void) |
|
{ |
|
int ret; |
|
|
|
ret = misc_register(&ucma_misc); |
|
if (ret) |
|
return ret; |
|
|
|
ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); |
|
if (ret) { |
|
pr_err("rdma_ucm: couldn't create abi_version attr\n"); |
|
goto err1; |
|
} |
|
|
|
ucma_ctl_table_hdr = register_net_sysctl(&init_net, "net/rdma_ucm", ucma_ctl_table); |
|
if (!ucma_ctl_table_hdr) { |
|
pr_err("rdma_ucm: couldn't register sysctl paths\n"); |
|
ret = -ENOMEM; |
|
goto err2; |
|
} |
|
|
|
ret = ib_register_client(&rdma_cma_client); |
|
if (ret) |
|
goto err3; |
|
|
|
return 0; |
|
err3: |
|
unregister_net_sysctl_table(ucma_ctl_table_hdr); |
|
err2: |
|
device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); |
|
err1: |
|
misc_deregister(&ucma_misc); |
|
return ret; |
|
} |
|
|
|
static void __exit ucma_cleanup(void) |
|
{ |
|
ib_unregister_client(&rdma_cma_client); |
|
unregister_net_sysctl_table(ucma_ctl_table_hdr); |
|
device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); |
|
misc_deregister(&ucma_misc); |
|
} |
|
|
|
module_init(ucma_init); |
|
module_exit(ucma_cleanup);
|
|
|