1351 lines
33 KiB
C
1351 lines
33 KiB
C
/*
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* Copyright (c) 2005 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Intel Corporation. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/completion.h>
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/poll.h>
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#include <linux/sched.h>
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#include <linux/file.h>
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#include <linux/mount.h>
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#include <linux/cdev.h>
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#include <linux/xarray.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/nospec.h>
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#include <linux/uaccess.h>
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#include <rdma/ib.h>
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#include <rdma/ib_cm.h>
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#include <rdma/ib_user_cm.h>
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#include <rdma/ib_marshall.h>
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#include "core_priv.h"
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MODULE_AUTHOR("Libor Michalek");
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MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access");
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MODULE_LICENSE("Dual BSD/GPL");
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struct ib_ucm_device {
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int devnum;
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struct cdev cdev;
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struct device dev;
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struct ib_device *ib_dev;
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};
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struct ib_ucm_file {
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struct mutex file_mutex;
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struct file *filp;
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struct ib_ucm_device *device;
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struct list_head ctxs;
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struct list_head events;
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wait_queue_head_t poll_wait;
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};
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struct ib_ucm_context {
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int id;
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struct completion comp;
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atomic_t ref;
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int events_reported;
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struct ib_ucm_file *file;
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struct ib_cm_id *cm_id;
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__u64 uid;
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struct list_head events; /* list of pending events. */
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struct list_head file_list; /* member in file ctx list */
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};
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struct ib_ucm_event {
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struct ib_ucm_context *ctx;
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struct list_head file_list; /* member in file event list */
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struct list_head ctx_list; /* member in ctx event list */
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struct ib_cm_id *cm_id;
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struct ib_ucm_event_resp resp;
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void *data;
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void *info;
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int data_len;
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int info_len;
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};
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enum {
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IB_UCM_MAJOR = 231,
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IB_UCM_BASE_MINOR = 224,
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IB_UCM_MAX_DEVICES = RDMA_MAX_PORTS,
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IB_UCM_NUM_FIXED_MINOR = 32,
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IB_UCM_NUM_DYNAMIC_MINOR = IB_UCM_MAX_DEVICES - IB_UCM_NUM_FIXED_MINOR,
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};
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#define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR)
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static dev_t dynamic_ucm_dev;
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static void ib_ucm_add_one(struct ib_device *device);
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static void ib_ucm_remove_one(struct ib_device *device, void *client_data);
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static struct ib_client ucm_client = {
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.name = "ucm",
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.add = ib_ucm_add_one,
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.remove = ib_ucm_remove_one
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};
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static DEFINE_XARRAY_ALLOC(ctx_id_table);
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static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES);
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static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id)
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{
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struct ib_ucm_context *ctx;
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xa_lock(&ctx_id_table);
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ctx = xa_load(&ctx_id_table, id);
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if (!ctx)
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ctx = ERR_PTR(-ENOENT);
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else if (ctx->file != file)
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ctx = ERR_PTR(-EINVAL);
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else
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atomic_inc(&ctx->ref);
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xa_unlock(&ctx_id_table);
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return ctx;
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}
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static void ib_ucm_ctx_put(struct ib_ucm_context *ctx)
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{
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if (atomic_dec_and_test(&ctx->ref))
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complete(&ctx->comp);
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}
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static inline int ib_ucm_new_cm_id(int event)
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{
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return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED;
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}
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static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx)
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{
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struct ib_ucm_event *uevent;
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mutex_lock(&ctx->file->file_mutex);
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list_del(&ctx->file_list);
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while (!list_empty(&ctx->events)) {
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uevent = list_entry(ctx->events.next,
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struct ib_ucm_event, ctx_list);
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list_del(&uevent->file_list);
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list_del(&uevent->ctx_list);
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mutex_unlock(&ctx->file->file_mutex);
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/* clear incoming connections. */
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if (ib_ucm_new_cm_id(uevent->resp.event))
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ib_destroy_cm_id(uevent->cm_id);
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kfree(uevent);
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mutex_lock(&ctx->file->file_mutex);
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}
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mutex_unlock(&ctx->file->file_mutex);
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}
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static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file)
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{
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struct ib_ucm_context *ctx;
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ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
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if (!ctx)
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return NULL;
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atomic_set(&ctx->ref, 1);
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init_completion(&ctx->comp);
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ctx->file = file;
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INIT_LIST_HEAD(&ctx->events);
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if (xa_alloc(&ctx_id_table, &ctx->id, ctx, xa_limit_32b, GFP_KERNEL))
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goto error;
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list_add_tail(&ctx->file_list, &file->ctxs);
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return ctx;
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error:
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kfree(ctx);
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return NULL;
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}
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static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq,
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const struct ib_cm_req_event_param *kreq)
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{
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ureq->remote_ca_guid = kreq->remote_ca_guid;
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ureq->remote_qkey = kreq->remote_qkey;
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ureq->remote_qpn = kreq->remote_qpn;
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ureq->qp_type = kreq->qp_type;
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ureq->starting_psn = kreq->starting_psn;
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ureq->responder_resources = kreq->responder_resources;
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ureq->initiator_depth = kreq->initiator_depth;
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ureq->local_cm_response_timeout = kreq->local_cm_response_timeout;
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ureq->flow_control = kreq->flow_control;
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ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout;
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ureq->retry_count = kreq->retry_count;
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ureq->rnr_retry_count = kreq->rnr_retry_count;
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ureq->srq = kreq->srq;
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ureq->port = kreq->port;
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ib_copy_path_rec_to_user(&ureq->primary_path, kreq->primary_path);
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if (kreq->alternate_path)
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ib_copy_path_rec_to_user(&ureq->alternate_path,
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kreq->alternate_path);
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}
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static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep,
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const struct ib_cm_rep_event_param *krep)
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{
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urep->remote_ca_guid = krep->remote_ca_guid;
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urep->remote_qkey = krep->remote_qkey;
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urep->remote_qpn = krep->remote_qpn;
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urep->starting_psn = krep->starting_psn;
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urep->responder_resources = krep->responder_resources;
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urep->initiator_depth = krep->initiator_depth;
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urep->target_ack_delay = krep->target_ack_delay;
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urep->failover_accepted = krep->failover_accepted;
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urep->flow_control = krep->flow_control;
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urep->rnr_retry_count = krep->rnr_retry_count;
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urep->srq = krep->srq;
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}
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static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep,
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const struct ib_cm_sidr_rep_event_param *krep)
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{
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urep->status = krep->status;
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urep->qkey = krep->qkey;
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urep->qpn = krep->qpn;
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};
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static int ib_ucm_event_process(const struct ib_cm_event *evt,
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struct ib_ucm_event *uvt)
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{
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void *info = NULL;
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switch (evt->event) {
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case IB_CM_REQ_RECEIVED:
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ib_ucm_event_req_get(&uvt->resp.u.req_resp,
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&evt->param.req_rcvd);
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uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE;
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uvt->resp.present = IB_UCM_PRES_PRIMARY;
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uvt->resp.present |= (evt->param.req_rcvd.alternate_path ?
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IB_UCM_PRES_ALTERNATE : 0);
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break;
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case IB_CM_REP_RECEIVED:
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ib_ucm_event_rep_get(&uvt->resp.u.rep_resp,
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&evt->param.rep_rcvd);
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uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
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break;
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case IB_CM_RTU_RECEIVED:
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uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE;
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uvt->resp.u.send_status = evt->param.send_status;
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break;
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case IB_CM_DREQ_RECEIVED:
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uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE;
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uvt->resp.u.send_status = evt->param.send_status;
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break;
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case IB_CM_DREP_RECEIVED:
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uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE;
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uvt->resp.u.send_status = evt->param.send_status;
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break;
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case IB_CM_MRA_RECEIVED:
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uvt->resp.u.mra_resp.timeout =
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evt->param.mra_rcvd.service_timeout;
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uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE;
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break;
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case IB_CM_REJ_RECEIVED:
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uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason;
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uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
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uvt->info_len = evt->param.rej_rcvd.ari_length;
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info = evt->param.rej_rcvd.ari;
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break;
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case IB_CM_LAP_RECEIVED:
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ib_copy_path_rec_to_user(&uvt->resp.u.lap_resp.path,
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evt->param.lap_rcvd.alternate_path);
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uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE;
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uvt->resp.present = IB_UCM_PRES_ALTERNATE;
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break;
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case IB_CM_APR_RECEIVED:
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uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status;
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uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE;
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uvt->info_len = evt->param.apr_rcvd.info_len;
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info = evt->param.apr_rcvd.apr_info;
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break;
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case IB_CM_SIDR_REQ_RECEIVED:
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uvt->resp.u.sidr_req_resp.pkey =
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evt->param.sidr_req_rcvd.pkey;
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uvt->resp.u.sidr_req_resp.port =
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evt->param.sidr_req_rcvd.port;
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uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE;
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break;
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case IB_CM_SIDR_REP_RECEIVED:
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ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp,
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&evt->param.sidr_rep_rcvd);
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uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
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uvt->info_len = evt->param.sidr_rep_rcvd.info_len;
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info = evt->param.sidr_rep_rcvd.info;
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break;
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default:
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uvt->resp.u.send_status = evt->param.send_status;
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break;
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}
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if (uvt->data_len) {
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uvt->data = kmemdup(evt->private_data, uvt->data_len, GFP_KERNEL);
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if (!uvt->data)
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goto err1;
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uvt->resp.present |= IB_UCM_PRES_DATA;
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}
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|
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if (uvt->info_len) {
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uvt->info = kmemdup(info, uvt->info_len, GFP_KERNEL);
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if (!uvt->info)
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goto err2;
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uvt->resp.present |= IB_UCM_PRES_INFO;
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}
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return 0;
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err2:
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kfree(uvt->data);
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err1:
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return -ENOMEM;
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}
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static int ib_ucm_event_handler(struct ib_cm_id *cm_id,
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const struct ib_cm_event *event)
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{
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struct ib_ucm_event *uevent;
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struct ib_ucm_context *ctx;
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int result = 0;
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ctx = cm_id->context;
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uevent = kzalloc(sizeof *uevent, GFP_KERNEL);
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if (!uevent)
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goto err1;
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uevent->ctx = ctx;
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uevent->cm_id = cm_id;
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uevent->resp.uid = ctx->uid;
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uevent->resp.id = ctx->id;
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uevent->resp.event = event->event;
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result = ib_ucm_event_process(event, uevent);
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if (result)
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goto err2;
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mutex_lock(&ctx->file->file_mutex);
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list_add_tail(&uevent->file_list, &ctx->file->events);
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list_add_tail(&uevent->ctx_list, &ctx->events);
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wake_up_interruptible(&ctx->file->poll_wait);
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mutex_unlock(&ctx->file->file_mutex);
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return 0;
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|
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err2:
|
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kfree(uevent);
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err1:
|
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/* Destroy new cm_id's */
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return ib_ucm_new_cm_id(event->event);
|
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}
|
|
|
|
static ssize_t ib_ucm_event(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
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struct ib_ucm_context *ctx;
|
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struct ib_ucm_event_get cmd;
|
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struct ib_ucm_event *uevent;
|
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int result = 0;
|
|
|
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if (out_len < sizeof(struct ib_ucm_event_resp))
|
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return -ENOSPC;
|
|
|
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if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
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return -EFAULT;
|
|
|
|
mutex_lock(&file->file_mutex);
|
|
while (list_empty(&file->events)) {
|
|
mutex_unlock(&file->file_mutex);
|
|
|
|
if (file->filp->f_flags & O_NONBLOCK)
|
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return -EAGAIN;
|
|
|
|
if (wait_event_interruptible(file->poll_wait,
|
|
!list_empty(&file->events)))
|
|
return -ERESTARTSYS;
|
|
|
|
mutex_lock(&file->file_mutex);
|
|
}
|
|
|
|
uevent = list_entry(file->events.next, struct ib_ucm_event, file_list);
|
|
|
|
if (ib_ucm_new_cm_id(uevent->resp.event)) {
|
|
ctx = ib_ucm_ctx_alloc(file);
|
|
if (!ctx) {
|
|
result = -ENOMEM;
|
|
goto done;
|
|
}
|
|
|
|
ctx->cm_id = uevent->cm_id;
|
|
ctx->cm_id->context = ctx;
|
|
uevent->resp.id = ctx->id;
|
|
}
|
|
|
|
if (copy_to_user(u64_to_user_ptr(cmd.response),
|
|
&uevent->resp, sizeof(uevent->resp))) {
|
|
result = -EFAULT;
|
|
goto done;
|
|
}
|
|
|
|
if (uevent->data) {
|
|
if (cmd.data_len < uevent->data_len) {
|
|
result = -ENOMEM;
|
|
goto done;
|
|
}
|
|
if (copy_to_user(u64_to_user_ptr(cmd.data),
|
|
uevent->data, uevent->data_len)) {
|
|
result = -EFAULT;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
if (uevent->info) {
|
|
if (cmd.info_len < uevent->info_len) {
|
|
result = -ENOMEM;
|
|
goto done;
|
|
}
|
|
if (copy_to_user(u64_to_user_ptr(cmd.info),
|
|
uevent->info, uevent->info_len)) {
|
|
result = -EFAULT;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
list_del(&uevent->file_list);
|
|
list_del(&uevent->ctx_list);
|
|
uevent->ctx->events_reported++;
|
|
|
|
kfree(uevent->data);
|
|
kfree(uevent->info);
|
|
kfree(uevent);
|
|
done:
|
|
mutex_unlock(&file->file_mutex);
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_create_id(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_ucm_create_id cmd;
|
|
struct ib_ucm_create_id_resp resp;
|
|
struct ib_ucm_context *ctx;
|
|
int result;
|
|
|
|
if (out_len < sizeof(resp))
|
|
return -ENOSPC;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
mutex_lock(&file->file_mutex);
|
|
ctx = ib_ucm_ctx_alloc(file);
|
|
mutex_unlock(&file->file_mutex);
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
|
|
ctx->uid = cmd.uid;
|
|
ctx->cm_id = ib_create_cm_id(file->device->ib_dev,
|
|
ib_ucm_event_handler, ctx);
|
|
if (IS_ERR(ctx->cm_id)) {
|
|
result = PTR_ERR(ctx->cm_id);
|
|
goto err1;
|
|
}
|
|
|
|
resp.id = ctx->id;
|
|
if (copy_to_user(u64_to_user_ptr(cmd.response),
|
|
&resp, sizeof(resp))) {
|
|
result = -EFAULT;
|
|
goto err2;
|
|
}
|
|
return 0;
|
|
|
|
err2:
|
|
ib_destroy_cm_id(ctx->cm_id);
|
|
err1:
|
|
xa_erase(&ctx_id_table, ctx->id);
|
|
kfree(ctx);
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_ucm_destroy_id cmd;
|
|
struct ib_ucm_destroy_id_resp resp;
|
|
struct ib_ucm_context *ctx;
|
|
int result = 0;
|
|
|
|
if (out_len < sizeof(resp))
|
|
return -ENOSPC;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
xa_lock(&ctx_id_table);
|
|
ctx = xa_load(&ctx_id_table, cmd.id);
|
|
if (!ctx)
|
|
ctx = ERR_PTR(-ENOENT);
|
|
else if (ctx->file != file)
|
|
ctx = ERR_PTR(-EINVAL);
|
|
else
|
|
__xa_erase(&ctx_id_table, ctx->id);
|
|
xa_unlock(&ctx_id_table);
|
|
|
|
if (IS_ERR(ctx))
|
|
return PTR_ERR(ctx);
|
|
|
|
ib_ucm_ctx_put(ctx);
|
|
wait_for_completion(&ctx->comp);
|
|
|
|
/* No new events will be generated after destroying the cm_id. */
|
|
ib_destroy_cm_id(ctx->cm_id);
|
|
/* Cleanup events not yet reported to the user. */
|
|
ib_ucm_cleanup_events(ctx);
|
|
|
|
resp.events_reported = ctx->events_reported;
|
|
if (copy_to_user(u64_to_user_ptr(cmd.response),
|
|
&resp, sizeof(resp)))
|
|
result = -EFAULT;
|
|
|
|
kfree(ctx);
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_ucm_attr_id_resp resp;
|
|
struct ib_ucm_attr_id cmd;
|
|
struct ib_ucm_context *ctx;
|
|
int result = 0;
|
|
|
|
if (out_len < sizeof(resp))
|
|
return -ENOSPC;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
ctx = ib_ucm_ctx_get(file, cmd.id);
|
|
if (IS_ERR(ctx))
|
|
return PTR_ERR(ctx);
|
|
|
|
resp.service_id = ctx->cm_id->service_id;
|
|
resp.service_mask = ctx->cm_id->service_mask;
|
|
resp.local_id = ctx->cm_id->local_id;
|
|
resp.remote_id = ctx->cm_id->remote_id;
|
|
|
|
if (copy_to_user(u64_to_user_ptr(cmd.response),
|
|
&resp, sizeof(resp)))
|
|
result = -EFAULT;
|
|
|
|
ib_ucm_ctx_put(ctx);
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_uverbs_qp_attr resp;
|
|
struct ib_ucm_init_qp_attr cmd;
|
|
struct ib_ucm_context *ctx;
|
|
struct ib_qp_attr qp_attr;
|
|
int result = 0;
|
|
|
|
if (out_len < sizeof(resp))
|
|
return -ENOSPC;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
ctx = ib_ucm_ctx_get(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;
|
|
result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask);
|
|
if (result)
|
|
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)))
|
|
result = -EFAULT;
|
|
|
|
out:
|
|
ib_ucm_ctx_put(ctx);
|
|
return result;
|
|
}
|
|
|
|
static int ucm_validate_listen(__be64 service_id, __be64 service_mask)
|
|
{
|
|
service_id &= service_mask;
|
|
|
|
if (((service_id & IB_CMA_SERVICE_ID_MASK) == IB_CMA_SERVICE_ID) ||
|
|
((service_id & IB_SDP_SERVICE_ID_MASK) == IB_SDP_SERVICE_ID))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t ib_ucm_listen(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_ucm_listen cmd;
|
|
struct ib_ucm_context *ctx;
|
|
int result;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
ctx = ib_ucm_ctx_get(file, cmd.id);
|
|
if (IS_ERR(ctx))
|
|
return PTR_ERR(ctx);
|
|
|
|
result = ucm_validate_listen(cmd.service_id, cmd.service_mask);
|
|
if (result)
|
|
goto out;
|
|
|
|
result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask);
|
|
out:
|
|
ib_ucm_ctx_put(ctx);
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_notify(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_ucm_notify cmd;
|
|
struct ib_ucm_context *ctx;
|
|
int result;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
ctx = ib_ucm_ctx_get(file, cmd.id);
|
|
if (IS_ERR(ctx))
|
|
return PTR_ERR(ctx);
|
|
|
|
result = ib_cm_notify(ctx->cm_id, (enum ib_event_type) cmd.event);
|
|
ib_ucm_ctx_put(ctx);
|
|
return result;
|
|
}
|
|
|
|
static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len)
|
|
{
|
|
void *data;
|
|
|
|
*dest = NULL;
|
|
|
|
if (!len)
|
|
return 0;
|
|
|
|
data = memdup_user(u64_to_user_ptr(src), len);
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
*dest = data;
|
|
return 0;
|
|
}
|
|
|
|
static int ib_ucm_path_get(struct sa_path_rec **path, u64 src)
|
|
{
|
|
struct ib_user_path_rec upath;
|
|
struct sa_path_rec *sa_path;
|
|
|
|
*path = NULL;
|
|
|
|
if (!src)
|
|
return 0;
|
|
|
|
sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL);
|
|
if (!sa_path)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(&upath, u64_to_user_ptr(src),
|
|
sizeof(upath))) {
|
|
|
|
kfree(sa_path);
|
|
return -EFAULT;
|
|
}
|
|
|
|
ib_copy_path_rec_from_user(sa_path, &upath);
|
|
*path = sa_path;
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_req(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_cm_req_param param;
|
|
struct ib_ucm_context *ctx;
|
|
struct ib_ucm_req cmd;
|
|
int result;
|
|
|
|
param.private_data = NULL;
|
|
param.primary_path = NULL;
|
|
param.alternate_path = NULL;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len);
|
|
if (result)
|
|
goto done;
|
|
|
|
result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path);
|
|
if (result)
|
|
goto done;
|
|
|
|
result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path);
|
|
if (result)
|
|
goto done;
|
|
|
|
param.private_data_len = cmd.len;
|
|
param.service_id = cmd.sid;
|
|
param.qp_num = cmd.qpn;
|
|
param.qp_type = cmd.qp_type;
|
|
param.starting_psn = cmd.psn;
|
|
param.peer_to_peer = cmd.peer_to_peer;
|
|
param.responder_resources = cmd.responder_resources;
|
|
param.initiator_depth = cmd.initiator_depth;
|
|
param.remote_cm_response_timeout = cmd.remote_cm_response_timeout;
|
|
param.flow_control = cmd.flow_control;
|
|
param.local_cm_response_timeout = cmd.local_cm_response_timeout;
|
|
param.retry_count = cmd.retry_count;
|
|
param.rnr_retry_count = cmd.rnr_retry_count;
|
|
param.max_cm_retries = cmd.max_cm_retries;
|
|
param.srq = cmd.srq;
|
|
|
|
ctx = ib_ucm_ctx_get(file, cmd.id);
|
|
if (!IS_ERR(ctx)) {
|
|
result = ib_send_cm_req(ctx->cm_id, ¶m);
|
|
ib_ucm_ctx_put(ctx);
|
|
} else
|
|
result = PTR_ERR(ctx);
|
|
|
|
done:
|
|
kfree(param.private_data);
|
|
kfree(param.primary_path);
|
|
kfree(param.alternate_path);
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_cm_rep_param param;
|
|
struct ib_ucm_context *ctx;
|
|
struct ib_ucm_rep cmd;
|
|
int result;
|
|
|
|
param.private_data = NULL;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len);
|
|
if (result)
|
|
return result;
|
|
|
|
param.qp_num = cmd.qpn;
|
|
param.starting_psn = cmd.psn;
|
|
param.private_data_len = cmd.len;
|
|
param.responder_resources = cmd.responder_resources;
|
|
param.initiator_depth = cmd.initiator_depth;
|
|
param.failover_accepted = cmd.failover_accepted;
|
|
param.flow_control = cmd.flow_control;
|
|
param.rnr_retry_count = cmd.rnr_retry_count;
|
|
param.srq = cmd.srq;
|
|
|
|
ctx = ib_ucm_ctx_get(file, cmd.id);
|
|
if (!IS_ERR(ctx)) {
|
|
ctx->uid = cmd.uid;
|
|
result = ib_send_cm_rep(ctx->cm_id, ¶m);
|
|
ib_ucm_ctx_put(ctx);
|
|
} else
|
|
result = PTR_ERR(ctx);
|
|
|
|
kfree(param.private_data);
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file,
|
|
const char __user *inbuf, int in_len,
|
|
int (*func)(struct ib_cm_id *cm_id,
|
|
const void *private_data,
|
|
u8 private_data_len))
|
|
{
|
|
struct ib_ucm_private_data cmd;
|
|
struct ib_ucm_context *ctx;
|
|
const void *private_data = NULL;
|
|
int result;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len);
|
|
if (result)
|
|
return result;
|
|
|
|
ctx = ib_ucm_ctx_get(file, cmd.id);
|
|
if (!IS_ERR(ctx)) {
|
|
result = func(ctx->cm_id, private_data, cmd.len);
|
|
ib_ucm_ctx_put(ctx);
|
|
} else
|
|
result = PTR_ERR(ctx);
|
|
|
|
kfree(private_data);
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu);
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq);
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep);
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_info(struct ib_ucm_file *file,
|
|
const char __user *inbuf, int in_len,
|
|
int (*func)(struct ib_cm_id *cm_id,
|
|
int status,
|
|
const void *info,
|
|
u8 info_len,
|
|
const void *data,
|
|
u8 data_len))
|
|
{
|
|
struct ib_ucm_context *ctx;
|
|
struct ib_ucm_info cmd;
|
|
const void *data = NULL;
|
|
const void *info = NULL;
|
|
int result;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len);
|
|
if (result)
|
|
goto done;
|
|
|
|
result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len);
|
|
if (result)
|
|
goto done;
|
|
|
|
ctx = ib_ucm_ctx_get(file, cmd.id);
|
|
if (!IS_ERR(ctx)) {
|
|
result = func(ctx->cm_id, cmd.status, info, cmd.info_len,
|
|
data, cmd.data_len);
|
|
ib_ucm_ctx_put(ctx);
|
|
} else
|
|
result = PTR_ERR(ctx);
|
|
|
|
done:
|
|
kfree(data);
|
|
kfree(info);
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej);
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr);
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_ucm_context *ctx;
|
|
struct ib_ucm_mra cmd;
|
|
const void *data = NULL;
|
|
int result;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
result = ib_ucm_alloc_data(&data, cmd.data, cmd.len);
|
|
if (result)
|
|
return result;
|
|
|
|
ctx = ib_ucm_ctx_get(file, cmd.id);
|
|
if (!IS_ERR(ctx)) {
|
|
result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len);
|
|
ib_ucm_ctx_put(ctx);
|
|
} else
|
|
result = PTR_ERR(ctx);
|
|
|
|
kfree(data);
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_ucm_context *ctx;
|
|
struct sa_path_rec *path = NULL;
|
|
struct ib_ucm_lap cmd;
|
|
const void *data = NULL;
|
|
int result;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
result = ib_ucm_alloc_data(&data, cmd.data, cmd.len);
|
|
if (result)
|
|
goto done;
|
|
|
|
result = ib_ucm_path_get(&path, cmd.path);
|
|
if (result)
|
|
goto done;
|
|
|
|
ctx = ib_ucm_ctx_get(file, cmd.id);
|
|
if (!IS_ERR(ctx)) {
|
|
result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len);
|
|
ib_ucm_ctx_put(ctx);
|
|
} else
|
|
result = PTR_ERR(ctx);
|
|
|
|
done:
|
|
kfree(data);
|
|
kfree(path);
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_cm_sidr_req_param param = {};
|
|
struct ib_ucm_context *ctx;
|
|
struct ib_ucm_sidr_req cmd;
|
|
int result;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len);
|
|
if (result)
|
|
goto done;
|
|
|
|
result = ib_ucm_path_get(¶m.path, cmd.path);
|
|
if (result)
|
|
goto done;
|
|
|
|
param.private_data_len = cmd.len;
|
|
param.service_id = cmd.sid;
|
|
param.timeout_ms = cmd.timeout;
|
|
param.max_cm_retries = cmd.max_cm_retries;
|
|
|
|
ctx = ib_ucm_ctx_get(file, cmd.id);
|
|
if (!IS_ERR(ctx)) {
|
|
result = ib_send_cm_sidr_req(ctx->cm_id, ¶m);
|
|
ib_ucm_ctx_put(ctx);
|
|
} else
|
|
result = PTR_ERR(ctx);
|
|
|
|
done:
|
|
kfree(param.private_data);
|
|
kfree(param.path);
|
|
return result;
|
|
}
|
|
|
|
static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len)
|
|
{
|
|
struct ib_cm_sidr_rep_param param;
|
|
struct ib_ucm_sidr_rep cmd;
|
|
struct ib_ucm_context *ctx;
|
|
int result;
|
|
|
|
param.info = NULL;
|
|
|
|
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
result = ib_ucm_alloc_data(¶m.private_data,
|
|
cmd.data, cmd.data_len);
|
|
if (result)
|
|
goto done;
|
|
|
|
result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len);
|
|
if (result)
|
|
goto done;
|
|
|
|
param.qp_num = cmd.qpn;
|
|
param.qkey = cmd.qkey;
|
|
param.status = cmd.status;
|
|
param.info_length = cmd.info_len;
|
|
param.private_data_len = cmd.data_len;
|
|
|
|
ctx = ib_ucm_ctx_get(file, cmd.id);
|
|
if (!IS_ERR(ctx)) {
|
|
result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m);
|
|
ib_ucm_ctx_put(ctx);
|
|
} else
|
|
result = PTR_ERR(ctx);
|
|
|
|
done:
|
|
kfree(param.private_data);
|
|
kfree(param.info);
|
|
return result;
|
|
}
|
|
|
|
static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file,
|
|
const char __user *inbuf,
|
|
int in_len, int out_len) = {
|
|
[IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id,
|
|
[IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id,
|
|
[IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id,
|
|
[IB_USER_CM_CMD_LISTEN] = ib_ucm_listen,
|
|
[IB_USER_CM_CMD_NOTIFY] = ib_ucm_notify,
|
|
[IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req,
|
|
[IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep,
|
|
[IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu,
|
|
[IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq,
|
|
[IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep,
|
|
[IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej,
|
|
[IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra,
|
|
[IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap,
|
|
[IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr,
|
|
[IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req,
|
|
[IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep,
|
|
[IB_USER_CM_CMD_EVENT] = ib_ucm_event,
|
|
[IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr,
|
|
};
|
|
|
|
static ssize_t ib_ucm_write(struct file *filp, const char __user *buf,
|
|
size_t len, loff_t *pos)
|
|
{
|
|
struct ib_ucm_file *file = filp->private_data;
|
|
struct ib_ucm_cmd_hdr hdr;
|
|
ssize_t result;
|
|
|
|
if (!ib_safe_file_access(filp)) {
|
|
pr_err_once("ucm_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(ucm_cmd_table))
|
|
return -EINVAL;
|
|
hdr.cmd = array_index_nospec(hdr.cmd, ARRAY_SIZE(ucm_cmd_table));
|
|
|
|
if (hdr.in + sizeof(hdr) > len)
|
|
return -EINVAL;
|
|
|
|
result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr),
|
|
hdr.in, hdr.out);
|
|
if (!result)
|
|
result = len;
|
|
|
|
return result;
|
|
}
|
|
|
|
static __poll_t ib_ucm_poll(struct file *filp,
|
|
struct poll_table_struct *wait)
|
|
{
|
|
struct ib_ucm_file *file = filp->private_data;
|
|
__poll_t mask = 0;
|
|
|
|
poll_wait(filp, &file->poll_wait, wait);
|
|
|
|
if (!list_empty(&file->events))
|
|
mask = EPOLLIN | EPOLLRDNORM;
|
|
|
|
return mask;
|
|
}
|
|
|
|
/*
|
|
* ib_ucm_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 ib_ucm_open(struct inode *inode, struct file *filp)
|
|
{
|
|
struct ib_ucm_file *file;
|
|
|
|
file = kmalloc(sizeof(*file), GFP_KERNEL);
|
|
if (!file)
|
|
return -ENOMEM;
|
|
|
|
INIT_LIST_HEAD(&file->events);
|
|
INIT_LIST_HEAD(&file->ctxs);
|
|
init_waitqueue_head(&file->poll_wait);
|
|
|
|
mutex_init(&file->file_mutex);
|
|
|
|
filp->private_data = file;
|
|
file->filp = filp;
|
|
file->device = container_of(inode->i_cdev, struct ib_ucm_device, cdev);
|
|
|
|
return stream_open(inode, filp);
|
|
}
|
|
|
|
static int ib_ucm_close(struct inode *inode, struct file *filp)
|
|
{
|
|
struct ib_ucm_file *file = filp->private_data;
|
|
struct ib_ucm_context *ctx;
|
|
|
|
mutex_lock(&file->file_mutex);
|
|
while (!list_empty(&file->ctxs)) {
|
|
ctx = list_entry(file->ctxs.next,
|
|
struct ib_ucm_context, file_list);
|
|
mutex_unlock(&file->file_mutex);
|
|
|
|
xa_erase(&ctx_id_table, ctx->id);
|
|
ib_destroy_cm_id(ctx->cm_id);
|
|
ib_ucm_cleanup_events(ctx);
|
|
kfree(ctx);
|
|
|
|
mutex_lock(&file->file_mutex);
|
|
}
|
|
mutex_unlock(&file->file_mutex);
|
|
kfree(file);
|
|
return 0;
|
|
}
|
|
|
|
static void ib_ucm_release_dev(struct device *dev)
|
|
{
|
|
struct ib_ucm_device *ucm_dev;
|
|
|
|
ucm_dev = container_of(dev, struct ib_ucm_device, dev);
|
|
kfree(ucm_dev);
|
|
}
|
|
|
|
static void ib_ucm_free_dev(struct ib_ucm_device *ucm_dev)
|
|
{
|
|
clear_bit(ucm_dev->devnum, dev_map);
|
|
}
|
|
|
|
static const struct file_operations ucm_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = ib_ucm_open,
|
|
.release = ib_ucm_close,
|
|
.write = ib_ucm_write,
|
|
.poll = ib_ucm_poll,
|
|
.llseek = no_llseek,
|
|
};
|
|
|
|
static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct ib_ucm_device *ucm_dev;
|
|
|
|
ucm_dev = container_of(dev, struct ib_ucm_device, dev);
|
|
return sprintf(buf, "%s\n", ucm_dev->ib_dev->name);
|
|
}
|
|
static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
|
|
|
|
static void ib_ucm_add_one(struct ib_device *device)
|
|
{
|
|
int devnum;
|
|
dev_t base;
|
|
struct ib_ucm_device *ucm_dev;
|
|
|
|
if (!device->ops.alloc_ucontext || !rdma_cap_ib_cm(device, 1))
|
|
return;
|
|
|
|
ucm_dev = kzalloc(sizeof *ucm_dev, GFP_KERNEL);
|
|
if (!ucm_dev)
|
|
return;
|
|
|
|
device_initialize(&ucm_dev->dev);
|
|
ucm_dev->ib_dev = device;
|
|
ucm_dev->dev.release = ib_ucm_release_dev;
|
|
|
|
devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES);
|
|
if (devnum >= IB_UCM_MAX_DEVICES)
|
|
goto err;
|
|
ucm_dev->devnum = devnum;
|
|
set_bit(devnum, dev_map);
|
|
if (devnum >= IB_UCM_NUM_FIXED_MINOR)
|
|
base = dynamic_ucm_dev + devnum - IB_UCM_NUM_FIXED_MINOR;
|
|
else
|
|
base = IB_UCM_BASE_DEV + devnum;
|
|
|
|
cdev_init(&ucm_dev->cdev, &ucm_fops);
|
|
ucm_dev->cdev.owner = THIS_MODULE;
|
|
kobject_set_name(&ucm_dev->cdev.kobj, "ucm%d", ucm_dev->devnum);
|
|
|
|
ucm_dev->dev.class = &cm_class;
|
|
ucm_dev->dev.parent = device->dev.parent;
|
|
ucm_dev->dev.devt = base;
|
|
|
|
dev_set_name(&ucm_dev->dev, "ucm%d", ucm_dev->devnum);
|
|
if (cdev_device_add(&ucm_dev->cdev, &ucm_dev->dev))
|
|
goto err_devnum;
|
|
|
|
if (device_create_file(&ucm_dev->dev, &dev_attr_ibdev))
|
|
goto err_dev;
|
|
|
|
ib_set_client_data(device, &ucm_client, ucm_dev);
|
|
return;
|
|
|
|
err_dev:
|
|
cdev_device_del(&ucm_dev->cdev, &ucm_dev->dev);
|
|
err_devnum:
|
|
ib_ucm_free_dev(ucm_dev);
|
|
err:
|
|
put_device(&ucm_dev->dev);
|
|
return;
|
|
}
|
|
|
|
static void ib_ucm_remove_one(struct ib_device *device, void *client_data)
|
|
{
|
|
struct ib_ucm_device *ucm_dev = client_data;
|
|
|
|
if (!ucm_dev)
|
|
return;
|
|
|
|
cdev_device_del(&ucm_dev->cdev, &ucm_dev->dev);
|
|
ib_ucm_free_dev(ucm_dev);
|
|
put_device(&ucm_dev->dev);
|
|
}
|
|
|
|
static CLASS_ATTR_STRING(abi_version, S_IRUGO,
|
|
__stringify(IB_USER_CM_ABI_VERSION));
|
|
|
|
static int __init ib_ucm_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_NUM_FIXED_MINOR,
|
|
"infiniband_cm");
|
|
if (ret) {
|
|
pr_err("ucm: couldn't register device number\n");
|
|
goto error1;
|
|
}
|
|
|
|
ret = alloc_chrdev_region(&dynamic_ucm_dev, 0, IB_UCM_NUM_DYNAMIC_MINOR,
|
|
"infiniband_cm");
|
|
if (ret) {
|
|
pr_err("ucm: couldn't register dynamic device number\n");
|
|
goto err_alloc;
|
|
}
|
|
|
|
ret = class_create_file(&cm_class, &class_attr_abi_version.attr);
|
|
if (ret) {
|
|
pr_err("ucm: couldn't create abi_version attribute\n");
|
|
goto error2;
|
|
}
|
|
|
|
ret = ib_register_client(&ucm_client);
|
|
if (ret) {
|
|
pr_err("ucm: couldn't register client\n");
|
|
goto error3;
|
|
}
|
|
return 0;
|
|
|
|
error3:
|
|
class_remove_file(&cm_class, &class_attr_abi_version.attr);
|
|
error2:
|
|
unregister_chrdev_region(dynamic_ucm_dev, IB_UCM_NUM_DYNAMIC_MINOR);
|
|
err_alloc:
|
|
unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_NUM_FIXED_MINOR);
|
|
error1:
|
|
return ret;
|
|
}
|
|
|
|
static void __exit ib_ucm_cleanup(void)
|
|
{
|
|
ib_unregister_client(&ucm_client);
|
|
class_remove_file(&cm_class, &class_attr_abi_version.attr);
|
|
unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_NUM_FIXED_MINOR);
|
|
unregister_chrdev_region(dynamic_ucm_dev, IB_UCM_NUM_DYNAMIC_MINOR);
|
|
WARN_ON(!xa_empty(&ctx_id_table));
|
|
}
|
|
|
|
module_init(ib_ucm_init);
|
|
module_exit(ib_ucm_cleanup);
|