+++ /dev/null
-/*
- * 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/xarray.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>
-
-#include "core_priv.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 = RDMA_MAX_PORTS,
- IB_UCM_NUM_FIXED_MINOR = 32,
- IB_UCM_NUM_DYNAMIC_MINOR = IB_UCM_MAX_DEVICES - IB_UCM_NUM_FIXED_MINOR,
-};
-
-#define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR)
-static dev_t dynamic_ucm_dev;
-
-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_XARRAY_ALLOC(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;
-
- xa_lock(&ctx_id_table);
- ctx = xa_load(&ctx_id_table, id);
- if (!ctx)
- ctx = ERR_PTR(-ENOENT);
- else if (ctx->file != file)
- ctx = ERR_PTR(-EINVAL);
- else
- atomic_inc(&ctx->ref);
- xa_unlock(&ctx_id_table);
-
- 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);
-
- if (xa_alloc(&ctx_id_table, &ctx->id, ctx, xa_limit_32b, GFP_KERNEL))
- 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,
- const 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,
- const 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,
- const 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(const 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,
- const 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(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);
OSDN Git Service
