| /* |
| * Copyright (c) 2005 Topspin Communications. All rights reserved. |
| * Copyright (c) 2005 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/init.h> |
| #include <linux/fs.h> |
| #include <linux/module.h> |
| #include <linux/device.h> |
| #include <linux/err.h> |
| #include <linux/poll.h> |
| #include <linux/sched.h> |
| #include <linux/file.h> |
| #include <linux/mount.h> |
| #include <linux/cdev.h> |
| #include <linux/idr.h> |
| #include <linux/mutex.h> |
| #include <linux/slab.h> |
| |
| #include <linux/nospec.h> |
| |
| #include <linux/uaccess.h> |
| |
| #include <rdma/ib.h> |
| #include <rdma/ib_cm.h> |
| #include <rdma/ib_user_cm.h> |
| #include <rdma/ib_marshall.h> |
| |
| MODULE_AUTHOR("Libor Michalek"); |
| MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access"); |
| MODULE_LICENSE("Dual BSD/GPL"); |
| |
| struct ib_ucm_device { |
| int devnum; |
| struct cdev cdev; |
| struct device dev; |
| struct ib_device *ib_dev; |
| }; |
| |
| struct ib_ucm_file { |
| struct mutex file_mutex; |
| struct file *filp; |
| struct ib_ucm_device *device; |
| |
| struct list_head ctxs; |
| struct list_head events; |
| wait_queue_head_t poll_wait; |
| }; |
| |
| struct ib_ucm_context { |
| int id; |
| struct completion comp; |
| atomic_t ref; |
| int events_reported; |
| |
| struct ib_ucm_file *file; |
| struct ib_cm_id *cm_id; |
| __u64 uid; |
| |
| struct list_head events; /* list of pending events. */ |
| struct list_head file_list; /* member in file ctx list */ |
| }; |
| |
| struct ib_ucm_event { |
| struct ib_ucm_context *ctx; |
| struct list_head file_list; /* member in file event list */ |
| struct list_head ctx_list; /* member in ctx event list */ |
| |
| struct ib_cm_id *cm_id; |
| struct ib_ucm_event_resp resp; |
| void *data; |
| void *info; |
| int data_len; |
| int info_len; |
| }; |
| |
| enum { |
| IB_UCM_MAJOR = 231, |
| IB_UCM_BASE_MINOR = 224, |
| IB_UCM_MAX_DEVICES = 32 |
| }; |
| |
| #define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR) |
| |
| static void ib_ucm_add_one(struct ib_device *device); |
| static void ib_ucm_remove_one(struct ib_device *device, void *client_data); |
| |
| static struct ib_client ucm_client = { |
| .name = "ucm", |
| .add = ib_ucm_add_one, |
| .remove = ib_ucm_remove_one |
| }; |
| |
| static DEFINE_MUTEX(ctx_id_mutex); |
| static DEFINE_IDR(ctx_id_table); |
| static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES); |
| |
| static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id) |
| { |
| struct ib_ucm_context *ctx; |
| |
| mutex_lock(&ctx_id_mutex); |
| ctx = idr_find(&ctx_id_table, id); |
| if (!ctx) |
| ctx = ERR_PTR(-ENOENT); |
| else if (ctx->file != file) |
| ctx = ERR_PTR(-EINVAL); |
| else |
| atomic_inc(&ctx->ref); |
| mutex_unlock(&ctx_id_mutex); |
| |
| return ctx; |
| } |
| |
| static void ib_ucm_ctx_put(struct ib_ucm_context *ctx) |
| { |
| if (atomic_dec_and_test(&ctx->ref)) |
| complete(&ctx->comp); |
| } |
| |
| static inline int ib_ucm_new_cm_id(int event) |
| { |
| return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED; |
| } |
| |
| static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx) |
| { |
| struct ib_ucm_event *uevent; |
| |
| mutex_lock(&ctx->file->file_mutex); |
| list_del(&ctx->file_list); |
| while (!list_empty(&ctx->events)) { |
| |
| uevent = list_entry(ctx->events.next, |
| struct ib_ucm_event, ctx_list); |
| list_del(&uevent->file_list); |
| list_del(&uevent->ctx_list); |
| mutex_unlock(&ctx->file->file_mutex); |
| |
| /* clear incoming connections. */ |
| if (ib_ucm_new_cm_id(uevent->resp.event)) |
| ib_destroy_cm_id(uevent->cm_id); |
| |
| kfree(uevent); |
| mutex_lock(&ctx->file->file_mutex); |
| } |
| mutex_unlock(&ctx->file->file_mutex); |
| } |
| |
| static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file) |
| { |
| struct ib_ucm_context *ctx; |
| |
| ctx = kzalloc(sizeof *ctx, GFP_KERNEL); |
| if (!ctx) |
| return NULL; |
| |
| atomic_set(&ctx->ref, 1); |
| init_completion(&ctx->comp); |
| ctx->file = file; |
| INIT_LIST_HEAD(&ctx->events); |
| |
| mutex_lock(&ctx_id_mutex); |
| ctx->id = idr_alloc(&ctx_id_table, ctx, 0, 0, GFP_KERNEL); |
| mutex_unlock(&ctx_id_mutex); |
| if (ctx->id < 0) |
| goto error; |
| |
| list_add_tail(&ctx->file_list, &file->ctxs); |
| return ctx; |
| |
| error: |
| kfree(ctx); |
| return NULL; |
| } |
| |
| static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq, |
| struct ib_cm_req_event_param *kreq) |
| { |
| ureq->remote_ca_guid = kreq->remote_ca_guid; |
| ureq->remote_qkey = kreq->remote_qkey; |
| ureq->remote_qpn = kreq->remote_qpn; |
| ureq->qp_type = kreq->qp_type; |
| ureq->starting_psn = kreq->starting_psn; |
| ureq->responder_resources = kreq->responder_resources; |
| ureq->initiator_depth = kreq->initiator_depth; |
| ureq->local_cm_response_timeout = kreq->local_cm_response_timeout; |
| ureq->flow_control = kreq->flow_control; |
| ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout; |
| ureq->retry_count = kreq->retry_count; |
| ureq->rnr_retry_count = kreq->rnr_retry_count; |
| ureq->srq = kreq->srq; |
| ureq->port = kreq->port; |
| |
| ib_copy_path_rec_to_user(&ureq->primary_path, kreq->primary_path); |
| if (kreq->alternate_path) |
| ib_copy_path_rec_to_user(&ureq->alternate_path, |
| kreq->alternate_path); |
| } |
| |
| static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep, |
| struct ib_cm_rep_event_param *krep) |
| { |
| urep->remote_ca_guid = krep->remote_ca_guid; |
| urep->remote_qkey = krep->remote_qkey; |
| urep->remote_qpn = krep->remote_qpn; |
| urep->starting_psn = krep->starting_psn; |
| urep->responder_resources = krep->responder_resources; |
| urep->initiator_depth = krep->initiator_depth; |
| urep->target_ack_delay = krep->target_ack_delay; |
| urep->failover_accepted = krep->failover_accepted; |
| urep->flow_control = krep->flow_control; |
| urep->rnr_retry_count = krep->rnr_retry_count; |
| urep->srq = krep->srq; |
| } |
| |
| static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep, |
| struct ib_cm_sidr_rep_event_param *krep) |
| { |
| urep->status = krep->status; |
| urep->qkey = krep->qkey; |
| urep->qpn = krep->qpn; |
| }; |
| |
| static int ib_ucm_event_process(struct ib_cm_event *evt, |
| struct ib_ucm_event *uvt) |
| { |
| void *info = NULL; |
| |
| switch (evt->event) { |
| case IB_CM_REQ_RECEIVED: |
| ib_ucm_event_req_get(&uvt->resp.u.req_resp, |
| &evt->param.req_rcvd); |
| uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE; |
| uvt->resp.present = IB_UCM_PRES_PRIMARY; |
| uvt->resp.present |= (evt->param.req_rcvd.alternate_path ? |
| IB_UCM_PRES_ALTERNATE : 0); |
| break; |
| case IB_CM_REP_RECEIVED: |
| ib_ucm_event_rep_get(&uvt->resp.u.rep_resp, |
| &evt->param.rep_rcvd); |
| uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE; |
| break; |
| case IB_CM_RTU_RECEIVED: |
| uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE; |
| uvt->resp.u.send_status = evt->param.send_status; |
| break; |
| case IB_CM_DREQ_RECEIVED: |
| uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE; |
| uvt->resp.u.send_status = evt->param.send_status; |
| break; |
| case IB_CM_DREP_RECEIVED: |
| uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE; |
| uvt->resp.u.send_status = evt->param.send_status; |
| break; |
| case IB_CM_MRA_RECEIVED: |
| uvt->resp.u.mra_resp.timeout = |
| evt->param.mra_rcvd.service_timeout; |
| uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE; |
| break; |
| case IB_CM_REJ_RECEIVED: |
| uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason; |
| uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; |
| uvt->info_len = evt->param.rej_rcvd.ari_length; |
| info = evt->param.rej_rcvd.ari; |
| break; |
| case IB_CM_LAP_RECEIVED: |
| ib_copy_path_rec_to_user(&uvt->resp.u.lap_resp.path, |
| evt->param.lap_rcvd.alternate_path); |
| uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE; |
| uvt->resp.present = IB_UCM_PRES_ALTERNATE; |
| break; |
| case IB_CM_APR_RECEIVED: |
| uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status; |
| uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE; |
| uvt->info_len = evt->param.apr_rcvd.info_len; |
| info = evt->param.apr_rcvd.apr_info; |
| break; |
| case IB_CM_SIDR_REQ_RECEIVED: |
| uvt->resp.u.sidr_req_resp.pkey = |
| evt->param.sidr_req_rcvd.pkey; |
| uvt->resp.u.sidr_req_resp.port = |
| evt->param.sidr_req_rcvd.port; |
| uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE; |
| break; |
| case IB_CM_SIDR_REP_RECEIVED: |
| ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp, |
| &evt->param.sidr_rep_rcvd); |
| uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; |
| uvt->info_len = evt->param.sidr_rep_rcvd.info_len; |
| info = evt->param.sidr_rep_rcvd.info; |
| break; |
| default: |
| uvt->resp.u.send_status = evt->param.send_status; |
| break; |
| } |
| |
| if (uvt->data_len) { |
| uvt->data = kmemdup(evt->private_data, uvt->data_len, GFP_KERNEL); |
| if (!uvt->data) |
| goto err1; |
| |
| uvt->resp.present |= IB_UCM_PRES_DATA; |
| } |
| |
| if (uvt->info_len) { |
| uvt->info = kmemdup(info, uvt->info_len, GFP_KERNEL); |
| if (!uvt->info) |
| goto err2; |
| |
| uvt->resp.present |= IB_UCM_PRES_INFO; |
| } |
| return 0; |
| |
| err2: |
| kfree(uvt->data); |
| err1: |
| return -ENOMEM; |
| } |
| |
| static int ib_ucm_event_handler(struct ib_cm_id *cm_id, |
| struct ib_cm_event *event) |
| { |
| struct ib_ucm_event *uevent; |
| struct ib_ucm_context *ctx; |
| int result = 0; |
| |
| ctx = cm_id->context; |
| |
| uevent = kzalloc(sizeof *uevent, GFP_KERNEL); |
| if (!uevent) |
| goto err1; |
| |
| uevent->ctx = ctx; |
| uevent->cm_id = cm_id; |
| uevent->resp.uid = ctx->uid; |
| uevent->resp.id = ctx->id; |
| uevent->resp.event = event->event; |
| |
| result = ib_ucm_event_process(event, uevent); |
| if (result) |
| goto err2; |
| |
| mutex_lock(&ctx->file->file_mutex); |
| list_add_tail(&uevent->file_list, &ctx->file->events); |
| list_add_tail(&uevent->ctx_list, &ctx->events); |
| wake_up_interruptible(&ctx->file->poll_wait); |
| mutex_unlock(&ctx->file->file_mutex); |
| return 0; |
| |
| err2: |
| kfree(uevent); |
| err1: |
| /* Destroy new cm_id's */ |
| return ib_ucm_new_cm_id(event->event); |
| } |
| |
| static ssize_t ib_ucm_event(struct ib_ucm_file *file, |
| const char __user *inbuf, |
| int in_len, int out_len) |
| { |
| struct ib_ucm_context *ctx; |
| struct ib_ucm_event_get cmd; |
| struct ib_ucm_event *uevent; |
| int result = 0; |
| |
| if (out_len < sizeof(struct ib_ucm_event_resp)) |
| return -ENOSPC; |
| |
| if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| return -EFAULT; |
| |
| mutex_lock(&file->file_mutex); |
| while (list_empty(&file->events)) { |
| mutex_unlock(&file->file_mutex); |
| |
| if (file->filp->f_flags & O_NONBLOCK) |
| 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((void __user *)(unsigned long)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((void __user *)(unsigned long)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((void __user *)(unsigned long)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((void __user *)(unsigned long)cmd.response, |
| &resp, sizeof(resp))) { |
| result = -EFAULT; |
| goto err2; |
| } |
| return 0; |
| |
| err2: |
| ib_destroy_cm_id(ctx->cm_id); |
| err1: |
| mutex_lock(&ctx_id_mutex); |
| idr_remove(&ctx_id_table, ctx->id); |
| mutex_unlock(&ctx_id_mutex); |
| 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; |
| |
| mutex_lock(&ctx_id_mutex); |
| ctx = idr_find(&ctx_id_table, cmd.id); |
| if (!ctx) |
| ctx = ERR_PTR(-ENOENT); |
| else if (ctx->file != file) |
| ctx = ERR_PTR(-EINVAL); |
| else |
| idr_remove(&ctx_id_table, ctx->id); |
| mutex_unlock(&ctx_id_mutex); |
| |
| 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((void __user *)(unsigned long)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((void __user *)(unsigned long)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((void __user *)(unsigned long)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((void __user *)(unsigned long)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, (void __user *)(unsigned long)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; |
| |
| param.private_data = NULL; |
| param.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.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 unsigned int ib_ucm_poll(struct file *filp, |
| struct poll_table_struct *wait) |
| { |
| struct ib_ucm_file *file = filp->private_data; |
| unsigned int mask = 0; |
| |
| poll_wait(filp, &file->poll_wait, wait); |
| |
| if (!list_empty(&file->events)) |
| mask = POLLIN | POLLRDNORM; |
| |
| 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 nonseekable_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); |
| |
| mutex_lock(&ctx_id_mutex); |
| idr_remove(&ctx_id_table, ctx->id); |
| mutex_unlock(&ctx_id_mutex); |
| |
| 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 DECLARE_BITMAP(overflow_map, IB_UCM_MAX_DEVICES); |
| 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) |
| { |
| if (ucm_dev->devnum < IB_UCM_MAX_DEVICES) |
| clear_bit(ucm_dev->devnum, dev_map); |
| else |
| clear_bit(ucm_dev->devnum - IB_UCM_MAX_DEVICES, overflow_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 dev_t overflow_maj; |
| static int find_overflow_devnum(void) |
| { |
| int ret; |
| |
| if (!overflow_maj) { |
| ret = alloc_chrdev_region(&overflow_maj, 0, IB_UCM_MAX_DEVICES, |
| "infiniband_cm"); |
| if (ret) { |
| pr_err("ucm: couldn't register dynamic device number\n"); |
| return ret; |
| } |
| } |
| |
| ret = find_first_zero_bit(overflow_map, IB_UCM_MAX_DEVICES); |
| if (ret >= IB_UCM_MAX_DEVICES) |
| return -1; |
| |
| return ret; |
| } |
| |
| static void ib_ucm_add_one(struct ib_device *device) |
| { |
| int devnum; |
| dev_t base; |
| struct ib_ucm_device *ucm_dev; |
| |
| if (!device->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) { |
| devnum = find_overflow_devnum(); |
| if (devnum < 0) |
| goto err; |
| |
| ucm_dev->devnum = devnum + IB_UCM_MAX_DEVICES; |
| base = devnum + overflow_maj; |
| set_bit(devnum, overflow_map); |
| } else { |
| ucm_dev->devnum = devnum; |
| base = devnum + IB_UCM_BASE_DEV; |
| set_bit(devnum, dev_map); |
| } |
| |
| 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_MAX_DEVICES, |
| "infiniband_cm"); |
| if (ret) { |
| pr_err("ucm: couldn't register device number\n"); |
| goto error1; |
| } |
| |
| 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(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); |
| 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_MAX_DEVICES); |
| if (overflow_maj) |
| unregister_chrdev_region(overflow_maj, IB_UCM_MAX_DEVICES); |
| idr_destroy(&ctx_id_table); |
| } |
| |
| module_init(ib_ucm_init); |
| module_exit(ib_ucm_cleanup); |