| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Sean Hefty | 7546 | 81.38% | 25 | 28.09% |
| Yishai Hadas | 451 | 4.86% | 1 | 1.12% |
| Steve Wise | 190 | 2.05% | 3 | 3.37% |
| Roland Dreier | 172 | 1.86% | 9 | 10.11% |
| Eli Cohen | 160 | 1.73% | 2 | 2.25% |
| Jason Gunthorpe | 156 | 1.68% | 5 | 5.62% |
| Leon Romanovsky | 118 | 1.27% | 7 | 7.87% |
| Dasaratharaman Chandramouli | 109 | 1.18% | 3 | 3.37% |
| Alex Vesker | 52 | 0.56% | 1 | 1.12% |
| Américo Wang | 38 | 0.41% | 2 | 2.25% |
| Michael Wang | 34 | 0.37% | 2 | 2.25% |
| Tejun Heo | 31 | 0.33% | 2 | 2.25% |
| Jann Horn | 27 | 0.29% | 1 | 1.12% |
| Parav Pandit | 27 | 0.29% | 4 | 4.49% |
| Sasha Levin | 26 | 0.28% | 1 | 1.12% |
| Moni Shoua | 20 | 0.22% | 1 | 1.12% |
| Gustavo A. R. Silva | 19 | 0.20% | 1 | 1.12% |
| shamir rabinovitch | 15 | 0.16% | 1 | 1.12% |
| Al Viro | 14 | 0.15% | 2 | 2.25% |
| Ilya Nelkenbaum | 13 | 0.14% | 1 | 1.12% |
| Tatyana Nikolova | 10 | 0.11% | 1 | 1.12% |
| Guy Shapiro | 9 | 0.10% | 2 | 2.25% |
| Haggai Eran | 6 | 0.06% | 1 | 1.12% |
| Johannes Thumshirn | 6 | 0.06% | 1 | 1.12% |
| Eric W. Biedermann | 6 | 0.06% | 2 | 2.25% |
| Alexey Dobriyan | 3 | 0.03% | 1 | 1.12% |
| Bhaktipriya Shridhar | 3 | 0.03% | 1 | 1.12% |
| Julien Brunel | 3 | 0.03% | 1 | 1.12% |
| Paul Gortmaker | 3 | 0.03% | 1 | 1.12% |
| Linus Torvalds | 2 | 0.02% | 1 | 1.12% |
| Ira Weiny | 1 | 0.01% | 1 | 1.12% |
| Joe Perches | 1 | 0.01% | 1 | 1.12% |
| Arjan van de Ven | 1 | 0.01% | 1 | 1.12% |
| Total | 9272 | 89 |
/* * Copyright (c) 2005-2006 Intel Corporation. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include <linux/completion.h> #include <linux/file.h> #include <linux/mutex.h> #include <linux/poll.h> #include <linux/sched.h> #include <linux/idr.h> #include <linux/in.h> #include <linux/in6.h> #include <linux/miscdevice.h> #include <linux/slab.h> #include <linux/sysctl.h> #include <linux/module.h> #include <linux/nsproxy.h> #include <linux/nospec.h> #include <rdma/rdma_user_cm.h> #include <rdma/ib_marshall.h> #include <rdma/rdma_cm.h> #include <rdma/rdma_cm_ib.h> #include <rdma/ib_addr.h> #include <rdma/ib.h> MODULE_AUTHOR("Sean Hefty"); MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access"); MODULE_LICENSE("Dual BSD/GPL"); static unsigned int max_backlog = 1024; static struct ctl_table_header *ucma_ctl_table_hdr; static struct ctl_table ucma_ctl_table[] = { { .procname = "max_backlog", .data = &max_backlog, .maxlen = sizeof max_backlog, .mode = 0644, .proc_handler = proc_dointvec, }, { } }; struct ucma_file { struct mutex mut; struct file *filp; struct list_head ctx_list; struct list_head event_list; wait_queue_head_t poll_wait; struct workqueue_struct *close_wq; }; struct ucma_context { int id; struct completion comp; atomic_t ref; int events_reported; int backlog; struct ucma_file *file; struct rdma_cm_id *cm_id; u64 uid; struct list_head list; struct list_head mc_list; /* mark that device is in process of destroying the internal HW * resources, protected by the global mut */ int closing; /* sync between removal event and id destroy, protected by file mut */ int destroying; struct work_struct close_work; }; struct ucma_multicast { struct ucma_context *ctx; int id; int events_reported; u64 uid; u8 join_state; struct list_head list; struct sockaddr_storage addr; }; struct ucma_event { struct ucma_context *ctx; struct ucma_multicast *mc; struct list_head list; struct rdma_cm_id *cm_id; struct rdma_ucm_event_resp resp; struct work_struct close_work; }; static DEFINE_MUTEX(mut); static DEFINE_IDR(ctx_idr); static DEFINE_IDR(multicast_idr); static const struct file_operations ucma_fops; static inline struct ucma_context *_ucma_find_context(int id, struct ucma_file *file) { struct ucma_context *ctx; ctx = idr_find(&ctx_idr, id); if (!ctx) ctx = ERR_PTR(-ENOENT); else if (ctx->file != file || !ctx->cm_id) ctx = ERR_PTR(-EINVAL); return ctx; } static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) { struct ucma_context *ctx; mutex_lock(&mut); ctx = _ucma_find_context(id, file); if (!IS_ERR(ctx)) { if (ctx->closing) ctx = ERR_PTR(-EIO); else atomic_inc(&ctx->ref); } mutex_unlock(&mut); return ctx; } static void ucma_put_ctx(struct ucma_context *ctx) { if (atomic_dec_and_test(&ctx->ref)) complete(&ctx->comp); } /* * Same as ucm_get_ctx but requires that ->cm_id->device is valid, eg that the * CM_ID is bound. */ static struct ucma_context *ucma_get_ctx_dev(struct ucma_file *file, int id) { struct ucma_context *ctx = ucma_get_ctx(file, id); if (IS_ERR(ctx)) return ctx; if (!ctx->cm_id->device) { ucma_put_ctx(ctx); return ERR_PTR(-EINVAL); } return ctx; } static void ucma_close_event_id(struct work_struct *work) { struct ucma_event *uevent_close = container_of(work, struct ucma_event, close_work); rdma_destroy_id(uevent_close->cm_id); kfree(uevent_close); } static void ucma_close_id(struct work_struct *work) { struct ucma_context *ctx = container_of(work, struct ucma_context, close_work); /* once all inflight tasks are finished, we close all underlying * resources. The context is still alive till its explicit destryoing * by its creator. */ ucma_put_ctx(ctx); wait_for_completion(&ctx->comp); /* No new events will be generated after destroying the id. */ rdma_destroy_id(ctx->cm_id); } static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) { struct ucma_context *ctx; ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); if (!ctx) return NULL; INIT_WORK(&ctx->close_work, ucma_close_id); atomic_set(&ctx->ref, 1); init_completion(&ctx->comp); INIT_LIST_HEAD(&ctx->mc_list); ctx->file = file; mutex_lock(&mut); ctx->id = idr_alloc(&ctx_idr, ctx, 0, 0, GFP_KERNEL); mutex_unlock(&mut); if (ctx->id < 0) goto error; list_add_tail(&ctx->list, &file->ctx_list); return ctx; error: kfree(ctx); return NULL; } static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx) { struct ucma_multicast *mc; mc = kzalloc(sizeof(*mc), GFP_KERNEL); if (!mc) return NULL; mutex_lock(&mut); mc->id = idr_alloc(&multicast_idr, NULL, 0, 0, GFP_KERNEL); mutex_unlock(&mut); if (mc->id < 0) goto error; mc->ctx = ctx; list_add_tail(&mc->list, &ctx->mc_list); return mc; error: kfree(mc); return NULL; } static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, struct rdma_conn_param *src) { if (src->private_data_len) memcpy(dst->private_data, src->private_data, src->private_data_len); dst->private_data_len = src->private_data_len; dst->responder_resources =src->responder_resources; dst->initiator_depth = src->initiator_depth; dst->flow_control = src->flow_control; dst->retry_count = src->retry_count; dst->rnr_retry_count = src->rnr_retry_count; dst->srq = src->srq; dst->qp_num = src->qp_num; } static void ucma_copy_ud_event(struct ib_device *device, struct rdma_ucm_ud_param *dst, struct rdma_ud_param *src) { if (src->private_data_len) memcpy(dst->private_data, src->private_data, src->private_data_len); dst->private_data_len = src->private_data_len; ib_copy_ah_attr_to_user(device, &dst->ah_attr, &src->ah_attr); dst->qp_num = src->qp_num; dst->qkey = src->qkey; } static void ucma_set_event_context(struct ucma_context *ctx, struct rdma_cm_event *event, struct ucma_event *uevent) { uevent->ctx = ctx; switch (event->event) { case RDMA_CM_EVENT_MULTICAST_JOIN: case RDMA_CM_EVENT_MULTICAST_ERROR: uevent->mc = (struct ucma_multicast *) event->param.ud.private_data; uevent->resp.uid = uevent->mc->uid; uevent->resp.id = uevent->mc->id; break; default: uevent->resp.uid = ctx->uid; uevent->resp.id = ctx->id; break; } } /* Called with file->mut locked for the relevant context. */ static void ucma_removal_event_handler(struct rdma_cm_id *cm_id) { struct ucma_context *ctx = cm_id->context; struct ucma_event *con_req_eve; int event_found = 0; if (ctx->destroying) return; /* only if context is pointing to cm_id that it owns it and can be * queued to be closed, otherwise that cm_id is an inflight one that * is part of that context event list pending to be detached and * reattached to its new context as part of ucma_get_event, * handled separately below. */ if (ctx->cm_id == cm_id) { mutex_lock(&mut); ctx->closing = 1; mutex_unlock(&mut); queue_work(ctx->file->close_wq, &ctx->close_work); return; } list_for_each_entry(con_req_eve, &ctx->file->event_list, list) { if (con_req_eve->cm_id == cm_id && con_req_eve->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { list_del(&con_req_eve->list); INIT_WORK(&con_req_eve->close_work, ucma_close_event_id); queue_work(ctx->file->close_wq, &con_req_eve->close_work); event_found = 1; break; } } if (!event_found) pr_err("ucma_removal_event_handler: warning: connect request event wasn't found\n"); } static int ucma_event_handler(struct rdma_cm_id *cm_id, struct rdma_cm_event *event) { struct ucma_event *uevent; struct ucma_context *ctx = cm_id->context; int ret = 0; uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); if (!uevent) return event->event == RDMA_CM_EVENT_CONNECT_REQUEST; mutex_lock(&ctx->file->mut); uevent->cm_id = cm_id; ucma_set_event_context(ctx, event, uevent); uevent->resp.event = event->event; uevent->resp.status = event->status; if (cm_id->qp_type == IB_QPT_UD) ucma_copy_ud_event(cm_id->device, &uevent->resp.param.ud, &event->param.ud); else ucma_copy_conn_event(&uevent->resp.param.conn, &event->param.conn); if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) { if (!ctx->backlog) { ret = -ENOMEM; kfree(uevent); goto out; } ctx->backlog--; } else if (!ctx->uid || ctx->cm_id != cm_id) { /* * We ignore events for new connections until userspace has set * their context. This can only happen if an error occurs on a * new connection before the user accepts it. This is okay, * since the accept will just fail later. However, we do need * to release the underlying HW resources in case of a device * removal event. */ if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) ucma_removal_event_handler(cm_id); kfree(uevent); goto out; } list_add_tail(&uevent->list, &ctx->file->event_list); wake_up_interruptible(&ctx->file->poll_wait); if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) ucma_removal_event_handler(cm_id); out: mutex_unlock(&ctx->file->mut); return ret; } static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct ucma_context *ctx; struct rdma_ucm_get_event cmd; struct ucma_event *uevent; int ret = 0; /* * Old 32 bit user space does not send the 4 byte padding in the * reserved field. We don't care, allow it to keep working. */ if (out_len < sizeof(uevent->resp) - sizeof(uevent->resp.reserved)) return -ENOSPC; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; mutex_lock(&file->mut); while (list_empty(&file->event_list)) { mutex_unlock(&file->mut); if (file->filp->f_flags & O_NONBLOCK) return -EAGAIN; if (wait_event_interruptible(file->poll_wait, !list_empty(&file->event_list))) return -ERESTARTSYS; mutex_lock(&file->mut); } uevent = list_entry(file->event_list.next, struct ucma_event, list); if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { ctx = ucma_alloc_ctx(file); if (!ctx) { ret = -ENOMEM; goto done; } uevent->ctx->backlog++; 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, min_t(size_t, out_len, sizeof(uevent->resp)))) { ret = -EFAULT; goto done; } list_del(&uevent->list); uevent->ctx->events_reported++; if (uevent->mc) uevent->mc->events_reported++; kfree(uevent); done: mutex_unlock(&file->mut); return ret; } static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type) { switch (cmd->ps) { case RDMA_PS_TCP: *qp_type = IB_QPT_RC; return 0; case RDMA_PS_UDP: case RDMA_PS_IPOIB: *qp_type = IB_QPT_UD; return 0; case RDMA_PS_IB: *qp_type = cmd->qp_type; return 0; default: return -EINVAL; } } static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_create_id cmd; struct rdma_ucm_create_id_resp resp; struct ucma_context *ctx; struct rdma_cm_id *cm_id; enum ib_qp_type qp_type; int ret; if (out_len < sizeof(resp)) return -ENOSPC; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; ret = ucma_get_qp_type(&cmd, &qp_type); if (ret) return ret; mutex_lock(&file->mut); ctx = ucma_alloc_ctx(file); mutex_unlock(&file->mut); if (!ctx) return -ENOMEM; ctx->uid = cmd.uid; cm_id = __rdma_create_id(current->nsproxy->net_ns, ucma_event_handler, ctx, cmd.ps, qp_type, NULL); if (IS_ERR(cm_id)) { ret = PTR_ERR(cm_id); goto err1; } resp.id = ctx->id; if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp))) { ret = -EFAULT; goto err2; } ctx->cm_id = cm_id; return 0; err2: rdma_destroy_id(cm_id); err1: mutex_lock(&mut); idr_remove(&ctx_idr, ctx->id); mutex_unlock(&mut); mutex_lock(&file->mut); list_del(&ctx->list); mutex_unlock(&file->mut); kfree(ctx); return ret; } static void ucma_cleanup_multicast(struct ucma_context *ctx) { struct ucma_multicast *mc, *tmp; mutex_lock(&mut); list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) { list_del(&mc->list); idr_remove(&multicast_idr, mc->id); kfree(mc); } mutex_unlock(&mut); } static void ucma_cleanup_mc_events(struct ucma_multicast *mc) { struct ucma_event *uevent, *tmp; list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { if (uevent->mc != mc) continue; list_del(&uevent->list); kfree(uevent); } } /* * ucma_free_ctx is called after the underlying rdma CM-ID is destroyed. At * this point, no new events will be reported from the hardware. However, we * still need to cleanup the UCMA context for this ID. Specifically, there * might be events that have not yet been consumed by the user space software. * These might include pending connect requests which we have not completed * processing. We cannot call rdma_destroy_id while holding the lock of the * context (file->mut), as it might cause a deadlock. We therefore extract all * relevant events from the context pending events list while holding the * mutex. After that we release them as needed. */ static int ucma_free_ctx(struct ucma_context *ctx) { int events_reported; struct ucma_event *uevent, *tmp; LIST_HEAD(list); ucma_cleanup_multicast(ctx); /* Cleanup events not yet reported to the user. */ mutex_lock(&ctx->file->mut); list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) { if (uevent->ctx == ctx) list_move_tail(&uevent->list, &list); } list_del(&ctx->list); mutex_unlock(&ctx->file->mut); list_for_each_entry_safe(uevent, tmp, &list, list) { list_del(&uevent->list); if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) rdma_destroy_id(uevent->cm_id); kfree(uevent); } events_reported = ctx->events_reported; kfree(ctx); return events_reported; } static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_destroy_id cmd; struct rdma_ucm_destroy_id_resp resp; struct ucma_context *ctx; int ret = 0; if (out_len < sizeof(resp)) return -ENOSPC; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; mutex_lock(&mut); ctx = _ucma_find_context(cmd.id, file); if (!IS_ERR(ctx)) idr_remove(&ctx_idr, ctx->id); mutex_unlock(&mut); if (IS_ERR(ctx)) return PTR_ERR(ctx); mutex_lock(&ctx->file->mut); ctx->destroying = 1; mutex_unlock(&ctx->file->mut); flush_workqueue(ctx->file->close_wq); /* At this point it's guaranteed that there is no inflight * closing task */ mutex_lock(&mut); if (!ctx->closing) { mutex_unlock(&mut); ucma_put_ctx(ctx); wait_for_completion(&ctx->comp); rdma_destroy_id(ctx->cm_id); } else { mutex_unlock(&mut); } resp.events_reported = ucma_free_ctx(ctx); if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp))) ret = -EFAULT; return ret; } static ssize_t ucma_bind_ip(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_bind_ip cmd; struct ucma_context *ctx; int ret; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; if (!rdma_addr_size_in6(&cmd.addr)) return -EINVAL; ctx = ucma_get_ctx(file, cmd.id); if (IS_ERR(ctx)) return PTR_ERR(ctx); ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); ucma_put_ctx(ctx); return ret; } static ssize_t ucma_bind(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_bind cmd; struct ucma_context *ctx; int ret; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; if (cmd.reserved || !cmd.addr_size || cmd.addr_size != rdma_addr_size_kss(&cmd.addr)) return -EINVAL; ctx = ucma_get_ctx(file, cmd.id); if (IS_ERR(ctx)) return PTR_ERR(ctx); ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); ucma_put_ctx(ctx); return ret; } static ssize_t ucma_resolve_ip(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_resolve_ip cmd; struct ucma_context *ctx; int ret; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; if ((cmd.src_addr.sin6_family && !rdma_addr_size_in6(&cmd.src_addr)) || !rdma_addr_size_in6(&cmd.dst_addr)) return -EINVAL; ctx = ucma_get_ctx(file, cmd.id); if (IS_ERR(ctx)) return PTR_ERR(ctx); ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, (struct sockaddr *) &cmd.dst_addr, cmd.timeout_ms); ucma_put_ctx(ctx); return ret; } static ssize_t ucma_resolve_addr(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_resolve_addr cmd; struct ucma_context *ctx; int ret; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; if (cmd.reserved || (cmd.src_size && (cmd.src_size != rdma_addr_size_kss(&cmd.src_addr))) || !cmd.dst_size || (cmd.dst_size != rdma_addr_size_kss(&cmd.dst_addr))) return -EINVAL; ctx = ucma_get_ctx(file, cmd.id); if (IS_ERR(ctx)) return PTR_ERR(ctx); ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, (struct sockaddr *) &cmd.dst_addr, cmd.timeout_ms); ucma_put_ctx(ctx); return ret; } static ssize_t ucma_resolve_route(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_resolve_route cmd; struct ucma_context *ctx; int ret; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; ctx = ucma_get_ctx_dev(file, cmd.id); if (IS_ERR(ctx)) return PTR_ERR(ctx); ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms); ucma_put_ctx(ctx); return ret; } static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, struct rdma_route *route) { struct rdma_dev_addr *dev_addr; resp->num_paths = route->num_paths; switch (route->num_paths) { case 0: dev_addr = &route->addr.dev_addr; rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid); rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid); resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); break; case 2: ib_copy_path_rec_to_user(&resp->ib_route[1], &route->path_rec[1]); /* fall through */ case 1: ib_copy_path_rec_to_user(&resp->ib_route[0], &route->path_rec[0]); break; default: break; } } static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp, struct rdma_route *route) { resp->num_paths = route->num_paths; switch (route->num_paths) { case 0: rdma_ip2gid((struct sockaddr *)&route->addr.dst_addr, (union ib_gid *)&resp->ib_route[0].dgid); rdma_ip2gid((struct sockaddr *)&route->addr.src_addr, (union ib_gid *)&resp->ib_route[0].sgid); resp->ib_route[0].pkey = cpu_to_be16(0xffff); break; case 2: ib_copy_path_rec_to_user(&resp->ib_route[1], &route->path_rec[1]); /* fall through */ case 1: ib_copy_path_rec_to_user(&resp->ib_route[0], &route->path_rec[0]); break; default: break; } } static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp, struct rdma_route *route) { struct rdma_dev_addr *dev_addr; dev_addr = &route->addr.dev_addr; rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid); rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid); } static ssize_t ucma_query_route(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_query cmd; struct rdma_ucm_query_route_resp resp; struct ucma_context *ctx; struct sockaddr *addr; int ret = 0; if (out_len < sizeof(resp)) return -ENOSPC; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; ctx = ucma_get_ctx(file, cmd.id); if (IS_ERR(ctx)) return PTR_ERR(ctx); memset(&resp, 0, sizeof resp); addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6)); addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6)); if (!ctx->cm_id->device) goto out; resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; resp.port_num = ctx->cm_id->port_num; if (rdma_cap_ib_sa(ctx->cm_id->device, ctx->cm_id->port_num)) ucma_copy_ib_route(&resp, &ctx->cm_id->route); else if (rdma_protocol_roce(ctx->cm_id->device, ctx->cm_id->port_num)) ucma_copy_iboe_route(&resp, &ctx->cm_id->route); else if (rdma_protocol_iwarp(ctx->cm_id->device, ctx->cm_id->port_num)) ucma_copy_iw_route(&resp, &ctx->cm_id->route); out: if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp))) ret = -EFAULT; ucma_put_ctx(ctx); return ret; } static void ucma_query_device_addr(struct rdma_cm_id *cm_id, struct rdma_ucm_query_addr_resp *resp) { if (!cm_id->device) return; resp->node_guid = (__force __u64) cm_id->device->node_guid; resp->port_num = cm_id->port_num; resp->pkey = (__force __u16) cpu_to_be16( ib_addr_get_pkey(&cm_id->route.addr.dev_addr)); } static ssize_t ucma_query_addr(struct ucma_context *ctx, void __user *response, int out_len) { struct rdma_ucm_query_addr_resp resp; struct sockaddr *addr; int ret = 0; if (out_len < sizeof(resp)) return -ENOSPC; memset(&resp, 0, sizeof resp); addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; resp.src_size = rdma_addr_size(addr); memcpy(&resp.src_addr, addr, resp.src_size); addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; resp.dst_size = rdma_addr_size(addr); memcpy(&resp.dst_addr, addr, resp.dst_size); ucma_query_device_addr(ctx->cm_id, &resp); if (copy_to_user(response, &resp, sizeof(resp))) ret = -EFAULT; return ret; } static ssize_t ucma_query_path(struct ucma_context *ctx, void __user *response, int out_len) { struct rdma_ucm_query_path_resp *resp; int i, ret = 0; if (out_len < sizeof(*resp)) return -ENOSPC; resp = kzalloc(out_len, GFP_KERNEL); if (!resp) return -ENOMEM; resp->num_paths = ctx->cm_id->route.num_paths; for (i = 0, out_len -= sizeof(*resp); i < resp->num_paths && out_len > sizeof(struct ib_path_rec_data); i++, out_len -= sizeof(struct ib_path_rec_data)) { struct sa_path_rec *rec = &ctx->cm_id->route.path_rec[i]; resp->path_data[i].flags = IB_PATH_GMP | IB_PATH_PRIMARY | IB_PATH_BIDIRECTIONAL; if (rec->rec_type == SA_PATH_REC_TYPE_OPA) { struct sa_path_rec ib; sa_convert_path_opa_to_ib(&ib, rec); ib_sa_pack_path(&ib, &resp->path_data[i].path_rec); } else { ib_sa_pack_path(rec, &resp->path_data[i].path_rec); } } if (copy_to_user(response, resp, sizeof(*resp) + (i * sizeof(struct ib_path_rec_data)))) ret = -EFAULT; kfree(resp); return ret; } static ssize_t ucma_query_gid(struct ucma_context *ctx, void __user *response, int out_len) { struct rdma_ucm_query_addr_resp resp; struct sockaddr_ib *addr; int ret = 0; if (out_len < sizeof(resp)) return -ENOSPC; memset(&resp, 0, sizeof resp); ucma_query_device_addr(ctx->cm_id, &resp); addr = (struct sockaddr_ib *) &resp.src_addr; resp.src_size = sizeof(*addr); if (ctx->cm_id->route.addr.src_addr.ss_family == AF_IB) { memcpy(addr, &ctx->cm_id->route.addr.src_addr, resp.src_size); } else { addr->sib_family = AF_IB; addr->sib_pkey = (__force __be16) resp.pkey; rdma_read_gids(ctx->cm_id, (union ib_gid *)&addr->sib_addr, NULL); addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) &ctx->cm_id->route.addr.src_addr); } addr = (struct sockaddr_ib *) &resp.dst_addr; resp.dst_size = sizeof(*addr); if (ctx->cm_id->route.addr.dst_addr.ss_family == AF_IB) { memcpy(addr, &ctx->cm_id->route.addr.dst_addr, resp.dst_size); } else { addr->sib_family = AF_IB; addr->sib_pkey = (__force __be16) resp.pkey; rdma_read_gids(ctx->cm_id, NULL, (union ib_gid *)&addr->sib_addr); addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr); } if (copy_to_user(response, &resp, sizeof(resp))) ret = -EFAULT; return ret; } static ssize_t ucma_query(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_query cmd; struct ucma_context *ctx; void __user *response; int ret; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; response = u64_to_user_ptr(cmd.response); ctx = ucma_get_ctx(file, cmd.id); if (IS_ERR(ctx)) return PTR_ERR(ctx); switch (cmd.option) { case RDMA_USER_CM_QUERY_ADDR: ret = ucma_query_addr(ctx, response, out_len); break; case RDMA_USER_CM_QUERY_PATH: ret = ucma_query_path(ctx, response, out_len); break; case RDMA_USER_CM_QUERY_GID: ret = ucma_query_gid(ctx, response, out_len); break; default: ret = -ENOSYS; break; } ucma_put_ctx(ctx); return ret; } static void ucma_copy_conn_param(struct rdma_cm_id *id, struct rdma_conn_param *dst, struct rdma_ucm_conn_param *src) { dst->private_data = src->private_data; dst->private_data_len = src->private_data_len; dst->responder_resources =src->responder_resources; dst->initiator_depth = src->initiator_depth; dst->flow_control = src->flow_control; dst->retry_count = src->retry_count; dst->rnr_retry_count = src->rnr_retry_count; dst->srq = src->srq; dst->qp_num = src->qp_num; dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0; } static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_connect cmd; struct rdma_conn_param conn_param; struct ucma_context *ctx; int ret; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; if (!cmd.conn_param.valid) return -EINVAL; ctx = ucma_get_ctx_dev(file, cmd.id); if (IS_ERR(ctx)) return PTR_ERR(ctx); ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); ret = rdma_connect(ctx->cm_id, &conn_param); ucma_put_ctx(ctx); return ret; } static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_listen cmd; struct ucma_context *ctx; int ret; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; ctx = ucma_get_ctx(file, cmd.id); if (IS_ERR(ctx)) return PTR_ERR(ctx); ctx->backlog = cmd.backlog > 0 && cmd.backlog < max_backlog ? cmd.backlog : max_backlog; ret = rdma_listen(ctx->cm_id, ctx->backlog); ucma_put_ctx(ctx); return ret; } static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_accept cmd; struct rdma_conn_param conn_param; struct ucma_context *ctx; int ret; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; ctx = ucma_get_ctx_dev(file, cmd.id); if (IS_ERR(ctx)) return PTR_ERR(ctx); if (cmd.conn_param.valid) { ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); mutex_lock(&file->mut); ret = __rdma_accept(ctx->cm_id, &conn_param, NULL); if (!ret) ctx->uid = cmd.uid; mutex_unlock(&file->mut); } else ret = __rdma_accept(ctx->cm_id, NULL, NULL); ucma_put_ctx(ctx); return ret; } static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_reject cmd; struct ucma_context *ctx; int ret; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; ctx = ucma_get_ctx_dev(file, cmd.id); if (IS_ERR(ctx)) return PTR_ERR(ctx); ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len); ucma_put_ctx(ctx); return ret; } static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_disconnect cmd; struct ucma_context *ctx; int ret; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; ctx = ucma_get_ctx_dev(file, cmd.id); if (IS_ERR(ctx)) return PTR_ERR(ctx); ret = rdma_disconnect(ctx->cm_id); ucma_put_ctx(ctx); return ret; } static ssize_t ucma_init_qp_attr(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_init_qp_attr cmd; struct ib_uverbs_qp_attr resp; struct ucma_context *ctx; struct ib_qp_attr qp_attr; int ret; if (out_len < sizeof(resp)) return -ENOSPC; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; if (cmd.qp_state > IB_QPS_ERR) return -EINVAL; ctx = ucma_get_ctx_dev(file, cmd.id); if (IS_ERR(ctx)) return PTR_ERR(ctx); resp.qp_attr_mask = 0; memset(&qp_attr, 0, sizeof qp_attr); qp_attr.qp_state = cmd.qp_state; ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); if (ret) goto out; ib_copy_qp_attr_to_user(ctx->cm_id->device, &resp, &qp_attr); if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp))) ret = -EFAULT; out: ucma_put_ctx(ctx); return ret; } static int ucma_set_option_id(struct ucma_context *ctx, int optname, void *optval, size_t optlen) { int ret = 0; switch (optname) { case RDMA_OPTION_ID_TOS: if (optlen != sizeof(u8)) { ret = -EINVAL; break; } rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); break; case RDMA_OPTION_ID_REUSEADDR: if (optlen != sizeof(int)) { ret = -EINVAL; break; } ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0); break; case RDMA_OPTION_ID_AFONLY: if (optlen != sizeof(int)) { ret = -EINVAL; break; } ret = rdma_set_afonly(ctx->cm_id, *((int *) optval) ? 1 : 0); break; default: ret = -ENOSYS; } return ret; } static int ucma_set_ib_path(struct ucma_context *ctx, struct ib_path_rec_data *path_data, size_t optlen) { struct sa_path_rec sa_path; struct rdma_cm_event event; int ret; if (optlen % sizeof(*path_data)) return -EINVAL; for (; optlen; optlen -= sizeof(*path_data), path_data++) { if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | IB_PATH_BIDIRECTIONAL)) break; } if (!optlen) return -EINVAL; if (!ctx->cm_id->device) return -EINVAL; memset(&sa_path, 0, sizeof(sa_path)); sa_path.rec_type = SA_PATH_REC_TYPE_IB; ib_sa_unpack_path(path_data->path_rec, &sa_path); if (rdma_cap_opa_ah(ctx->cm_id->device, ctx->cm_id->port_num)) { struct sa_path_rec opa; sa_convert_path_ib_to_opa(&opa, &sa_path); ret = rdma_set_ib_path(ctx->cm_id, &opa); } else { ret = rdma_set_ib_path(ctx->cm_id, &sa_path); } if (ret) return ret; memset(&event, 0, sizeof event); event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; return ucma_event_handler(ctx->cm_id, &event); } static int ucma_set_option_ib(struct ucma_context *ctx, int optname, void *optval, size_t optlen) { int ret; switch (optname) { case RDMA_OPTION_IB_PATH: ret = ucma_set_ib_path(ctx, optval, optlen); break; default: ret = -ENOSYS; } return ret; } static int ucma_set_option_level(struct ucma_context *ctx, int level, int optname, void *optval, size_t optlen) { int ret; switch (level) { case RDMA_OPTION_ID: ret = ucma_set_option_id(ctx, optname, optval, optlen); break; case RDMA_OPTION_IB: ret = ucma_set_option_ib(ctx, optname, optval, optlen); break; default: ret = -ENOSYS; } return ret; } static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_set_option cmd; struct ucma_context *ctx; void *optval; int ret; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; if (unlikely(cmd.optlen > KMALLOC_MAX_SIZE)) return -EINVAL; ctx = ucma_get_ctx(file, cmd.id); if (IS_ERR(ctx)) return PTR_ERR(ctx); optval = memdup_user(u64_to_user_ptr(cmd.optval), cmd.optlen); if (IS_ERR(optval)) { ret = PTR_ERR(optval); goto out; } ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, cmd.optlen); kfree(optval); out: ucma_put_ctx(ctx); return ret; } static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_notify cmd; struct ucma_context *ctx; int ret = -EINVAL; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; ctx = ucma_get_ctx(file, cmd.id); if (IS_ERR(ctx)) return PTR_ERR(ctx); if (ctx->cm_id->device) ret = rdma_notify(ctx->cm_id, (enum ib_event_type)cmd.event); ucma_put_ctx(ctx); return ret; } static ssize_t ucma_process_join(struct ucma_file *file, struct rdma_ucm_join_mcast *cmd, int out_len) { struct rdma_ucm_create_id_resp resp; struct ucma_context *ctx; struct ucma_multicast *mc; struct sockaddr *addr; int ret; u8 join_state; if (out_len < sizeof(resp)) return -ENOSPC; addr = (struct sockaddr *) &cmd->addr; if (cmd->addr_size != rdma_addr_size(addr)) return -EINVAL; if (cmd->join_flags == RDMA_MC_JOIN_FLAG_FULLMEMBER) join_state = BIT(FULLMEMBER_JOIN); else if (cmd->join_flags == RDMA_MC_JOIN_FLAG_SENDONLY_FULLMEMBER) join_state = BIT(SENDONLY_FULLMEMBER_JOIN); else return -EINVAL; ctx = ucma_get_ctx_dev(file, cmd->id); if (IS_ERR(ctx)) return PTR_ERR(ctx); mutex_lock(&file->mut); mc = ucma_alloc_multicast(ctx); if (!mc) { ret = -ENOMEM; goto err1; } mc->join_state = join_state; mc->uid = cmd->uid; memcpy(&mc->addr, addr, cmd->addr_size); ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *)&mc->addr, join_state, mc); if (ret) goto err2; resp.id = mc->id; if (copy_to_user(u64_to_user_ptr(cmd->response), &resp, sizeof(resp))) { ret = -EFAULT; goto err3; } mutex_lock(&mut); idr_replace(&multicast_idr, mc, mc->id); mutex_unlock(&mut); mutex_unlock(&file->mut); ucma_put_ctx(ctx); return 0; err3: rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); ucma_cleanup_mc_events(mc); err2: mutex_lock(&mut); idr_remove(&multicast_idr, mc->id); mutex_unlock(&mut); list_del(&mc->list); kfree(mc); err1: mutex_unlock(&file->mut); ucma_put_ctx(ctx); return ret; } static ssize_t ucma_join_ip_multicast(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_join_ip_mcast cmd; struct rdma_ucm_join_mcast join_cmd; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; join_cmd.response = cmd.response; join_cmd.uid = cmd.uid; join_cmd.id = cmd.id; join_cmd.addr_size = rdma_addr_size_in6(&cmd.addr); if (!join_cmd.addr_size) return -EINVAL; join_cmd.join_flags = RDMA_MC_JOIN_FLAG_FULLMEMBER; memcpy(&join_cmd.addr, &cmd.addr, join_cmd.addr_size); return ucma_process_join(file, &join_cmd, out_len); } static ssize_t ucma_join_multicast(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_join_mcast cmd; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; if (!rdma_addr_size_kss(&cmd.addr)) return -EINVAL; return ucma_process_join(file, &cmd, out_len); } static ssize_t ucma_leave_multicast(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_destroy_id cmd; struct rdma_ucm_destroy_id_resp resp; struct ucma_multicast *mc; int ret = 0; if (out_len < sizeof(resp)) return -ENOSPC; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; mutex_lock(&mut); mc = idr_find(&multicast_idr, cmd.id); if (!mc) mc = ERR_PTR(-ENOENT); else if (mc->ctx->file != file) mc = ERR_PTR(-EINVAL); else if (!atomic_inc_not_zero(&mc->ctx->ref)) mc = ERR_PTR(-ENXIO); else idr_remove(&multicast_idr, mc->id); mutex_unlock(&mut); if (IS_ERR(mc)) { ret = PTR_ERR(mc); goto out; } rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); mutex_lock(&mc->ctx->file->mut); ucma_cleanup_mc_events(mc); list_del(&mc->list); mutex_unlock(&mc->ctx->file->mut); ucma_put_ctx(mc->ctx); resp.events_reported = mc->events_reported; kfree(mc); if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp))) ret = -EFAULT; out: return ret; } static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2) { /* Acquire mutex's based on pointer comparison to prevent deadlock. */ if (file1 < file2) { mutex_lock(&file1->mut); mutex_lock_nested(&file2->mut, SINGLE_DEPTH_NESTING); } else { mutex_lock(&file2->mut); mutex_lock_nested(&file1->mut, SINGLE_DEPTH_NESTING); } } static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2) { if (file1 < file2) { mutex_unlock(&file2->mut); mutex_unlock(&file1->mut); } else { mutex_unlock(&file1->mut); mutex_unlock(&file2->mut); } } static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file) { struct ucma_event *uevent, *tmp; list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) if (uevent->ctx == ctx) list_move_tail(&uevent->list, &file->event_list); } static ssize_t ucma_migrate_id(struct ucma_file *new_file, const char __user *inbuf, int in_len, int out_len) { struct rdma_ucm_migrate_id cmd; struct rdma_ucm_migrate_resp resp; struct ucma_context *ctx; struct fd f; struct ucma_file *cur_file; int ret = 0; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; /* Get current fd to protect against it being closed */ f = fdget(cmd.fd); if (!f.file) return -ENOENT; if (f.file->f_op != &ucma_fops) { ret = -EINVAL; goto file_put; } /* Validate current fd and prevent destruction of id. */ ctx = ucma_get_ctx(f.file->private_data, cmd.id); if (IS_ERR(ctx)) { ret = PTR_ERR(ctx); goto file_put; } cur_file = ctx->file; if (cur_file == new_file) { resp.events_reported = ctx->events_reported; goto response; } /* * Migrate events between fd's, maintaining order, and avoiding new * events being added before existing events. */ ucma_lock_files(cur_file, new_file); mutex_lock(&mut); list_move_tail(&ctx->list, &new_file->ctx_list); ucma_move_events(ctx, new_file); ctx->file = new_file; resp.events_reported = ctx->events_reported; mutex_unlock(&mut); ucma_unlock_files(cur_file, new_file); response: if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp))) ret = -EFAULT; ucma_put_ctx(ctx); file_put: fdput(f); return ret; } static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) = { [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, [RDMA_USER_CM_CMD_BIND_IP] = ucma_bind_ip, [RDMA_USER_CM_CMD_RESOLVE_IP] = ucma_resolve_ip, [RDMA_USER_CM_CMD_RESOLVE_ROUTE] = ucma_resolve_route, [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, [RDMA_USER_CM_CMD_CONNECT] = ucma_connect, [RDMA_USER_CM_CMD_LISTEN] = ucma_listen, [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, [RDMA_USER_CM_CMD_REJECT] = ucma_reject, [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, [RDMA_USER_CM_CMD_GET_OPTION] = NULL, [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, [RDMA_USER_CM_CMD_JOIN_IP_MCAST] = ucma_join_ip_multicast, [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id, [RDMA_USER_CM_CMD_QUERY] = ucma_query, [RDMA_USER_CM_CMD_BIND] = ucma_bind, [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast }; static ssize_t ucma_write(struct file *filp, const char __user *buf, size_t len, loff_t *pos) { struct ucma_file *file = filp->private_data; struct rdma_ucm_cmd_hdr hdr; ssize_t ret; if (!ib_safe_file_access(filp)) { pr_err_once("ucma_write: process %d (%s) changed security contexts after opening file descriptor, this is not allowed.\n", task_tgid_vnr(current), current->comm); return -EACCES; } if (len < sizeof(hdr)) return -EINVAL; if (copy_from_user(&hdr, buf, sizeof(hdr))) return -EFAULT; if (hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) return -EINVAL; hdr.cmd = array_index_nospec(hdr.cmd, ARRAY_SIZE(ucma_cmd_table)); if (hdr.in + sizeof(hdr) > len) return -EINVAL; if (!ucma_cmd_table[hdr.cmd]) return -ENOSYS; ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); if (!ret) ret = len; return ret; } static __poll_t ucma_poll(struct file *filp, struct poll_table_struct *wait) { struct ucma_file *file = filp->private_data; __poll_t mask = 0; poll_wait(filp, &file->poll_wait, wait); if (!list_empty(&file->event_list)) mask = EPOLLIN | EPOLLRDNORM; return mask; } /* * ucma_open() does not need the BKL: * * - no global state is referred to; * - there is no ioctl method to race against; * - no further module initialization is required for open to work * after the device is registered. */ static int ucma_open(struct inode *inode, struct file *filp) { struct ucma_file *file; file = kmalloc(sizeof *file, GFP_KERNEL); if (!file) return -ENOMEM; file->close_wq = alloc_ordered_workqueue("ucma_close_id", WQ_MEM_RECLAIM); if (!file->close_wq) { kfree(file); return -ENOMEM; } INIT_LIST_HEAD(&file->event_list); INIT_LIST_HEAD(&file->ctx_list); init_waitqueue_head(&file->poll_wait); mutex_init(&file->mut); filp->private_data = file; file->filp = filp; return nonseekable_open(inode, filp); } static int ucma_close(struct inode *inode, struct file *filp) { struct ucma_file *file = filp->private_data; struct ucma_context *ctx, *tmp; mutex_lock(&file->mut); list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) { ctx->destroying = 1; mutex_unlock(&file->mut); mutex_lock(&mut); idr_remove(&ctx_idr, ctx->id); mutex_unlock(&mut); flush_workqueue(file->close_wq); /* At that step once ctx was marked as destroying and workqueue * was flushed we are safe from any inflights handlers that * might put other closing task. */ mutex_lock(&mut); if (!ctx->closing) { mutex_unlock(&mut); ucma_put_ctx(ctx); wait_for_completion(&ctx->comp); /* rdma_destroy_id ensures that no event handlers are * inflight for that id before releasing it. */ rdma_destroy_id(ctx->cm_id); } else { mutex_unlock(&mut); } ucma_free_ctx(ctx); mutex_lock(&file->mut); } mutex_unlock(&file->mut); destroy_workqueue(file->close_wq); kfree(file); return 0; } static const struct file_operations ucma_fops = { .owner = THIS_MODULE, .open = ucma_open, .release = ucma_close, .write = ucma_write, .poll = ucma_poll, .llseek = no_llseek, }; static struct miscdevice ucma_misc = { .minor = MISC_DYNAMIC_MINOR, .name = "rdma_cm", .nodename = "infiniband/rdma_cm", .mode = 0666, .fops = &ucma_fops, }; static ssize_t show_abi_version(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); } static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); static int __init ucma_init(void) { int ret; ret = misc_register(&ucma_misc); if (ret) return ret; ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); if (ret) { pr_err("rdma_ucm: couldn't create abi_version attr\n"); goto err1; } ucma_ctl_table_hdr = register_net_sysctl(&init_net, "net/rdma_ucm", ucma_ctl_table); if (!ucma_ctl_table_hdr) { pr_err("rdma_ucm: couldn't register sysctl paths\n"); ret = -ENOMEM; goto err2; } return 0; err2: device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); err1: misc_deregister(&ucma_misc); return ret; } static void __exit ucma_cleanup(void) { unregister_net_sysctl_table(ucma_ctl_table_hdr); device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); misc_deregister(&ucma_misc); idr_destroy(&ctx_idr); idr_destroy(&multicast_idr); } module_init(ucma_init); module_exit(ucma_cleanup);
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