/* * Copyright (c) 2005 Topspin Communications. All rights reserved. * Copyright (c) 2005 Cisco Systems. All rights reserved. * Copyright (c) 2005 PathScale, Inc. 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. * * $Id: uverbs_cmd.c 2708 2005-06-24 17:27:21Z roland $ */ #include #include #include #include "uverbs.h" #define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \ do { \ (udata)->inbuf = (void __user *) (ibuf); \ (udata)->outbuf = (void __user *) (obuf); \ (udata)->inlen = (ilen); \ (udata)->outlen = (olen); \ } while (0) ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_get_context cmd; struct ib_uverbs_get_context_resp resp; struct ib_udata udata; struct ib_device *ibdev = file->device->ib_dev; struct ib_ucontext *ucontext; struct file *filp; int ret; if (out_len < sizeof resp) return -ENOSPC; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; down(&file->mutex); if (file->ucontext) { ret = -EINVAL; goto err; } INIT_UDATA(&udata, buf + sizeof cmd, (unsigned long) cmd.response + sizeof resp, in_len - sizeof cmd, out_len - sizeof resp); ucontext = ibdev->alloc_ucontext(ibdev, &udata); if (IS_ERR(ucontext)) return PTR_ERR(file->ucontext); ucontext->device = ibdev; INIT_LIST_HEAD(&ucontext->pd_list); INIT_LIST_HEAD(&ucontext->mr_list); INIT_LIST_HEAD(&ucontext->mw_list); INIT_LIST_HEAD(&ucontext->cq_list); INIT_LIST_HEAD(&ucontext->qp_list); INIT_LIST_HEAD(&ucontext->srq_list); INIT_LIST_HEAD(&ucontext->ah_list); resp.num_comp_vectors = file->device->num_comp_vectors; filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd); if (IS_ERR(filp)) { ret = PTR_ERR(filp); goto err_free; } if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) { ret = -EFAULT; goto err_file; } file->async_file = filp->private_data; INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev, ib_uverbs_event_handler); ret = ib_register_event_handler(&file->event_handler); if (ret) goto err_file; kref_get(&file->async_file->ref); kref_get(&file->ref); file->ucontext = ucontext; fd_install(resp.async_fd, filp); up(&file->mutex); return in_len; err_file: put_unused_fd(resp.async_fd); fput(filp); err_free: ibdev->dealloc_ucontext(ucontext); err: up(&file->mutex); return ret; } ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_query_device cmd; struct ib_uverbs_query_device_resp resp; struct ib_device_attr attr; int ret; if (out_len < sizeof resp) return -ENOSPC; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; ret = ib_query_device(file->device->ib_dev, &attr); if (ret) return ret; memset(&resp, 0, sizeof resp); resp.fw_ver = attr.fw_ver; resp.node_guid = attr.node_guid; resp.sys_image_guid = attr.sys_image_guid; resp.max_mr_size = attr.max_mr_size; resp.page_size_cap = attr.page_size_cap; resp.vendor_id = attr.vendor_id; resp.vendor_part_id = attr.vendor_part_id; resp.hw_ver = attr.hw_ver; resp.max_qp = attr.max_qp; resp.max_qp_wr = attr.max_qp_wr; resp.device_cap_flags = attr.device_cap_flags; resp.max_sge = attr.max_sge; resp.max_sge_rd = attr.max_sge_rd; resp.max_cq = attr.max_cq; resp.max_cqe = attr.max_cqe; resp.max_mr = attr.max_mr; resp.max_pd = attr.max_pd; resp.max_qp_rd_atom = attr.max_qp_rd_atom; resp.max_ee_rd_atom = attr.max_ee_rd_atom; resp.max_res_rd_atom = attr.max_res_rd_atom; resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom; resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom; resp.atomic_cap = attr.atomic_cap; resp.max_ee = attr.max_ee; resp.max_rdd = attr.max_rdd; resp.max_mw = attr.max_mw; resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp; resp.max_raw_ethy_qp = attr.max_raw_ethy_qp; resp.max_mcast_grp = attr.max_mcast_grp; resp.max_mcast_qp_attach = attr.max_mcast_qp_attach; resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach; resp.max_ah = attr.max_ah; resp.max_fmr = attr.max_fmr; resp.max_map_per_fmr = attr.max_map_per_fmr; resp.max_srq = attr.max_srq; resp.max_srq_wr = attr.max_srq_wr; resp.max_srq_sge = attr.max_srq_sge; resp.max_pkeys = attr.max_pkeys; resp.local_ca_ack_delay = attr.local_ca_ack_delay; resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt; if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) return -EFAULT; return in_len; } ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_query_port cmd; struct ib_uverbs_query_port_resp resp; struct ib_port_attr attr; int ret; if (out_len < sizeof resp) return -ENOSPC; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr); if (ret) return ret; memset(&resp, 0, sizeof resp); resp.state = attr.state; resp.max_mtu = attr.max_mtu; resp.active_mtu = attr.active_mtu; resp.gid_tbl_len = attr.gid_tbl_len; resp.port_cap_flags = attr.port_cap_flags; resp.max_msg_sz = attr.max_msg_sz; resp.bad_pkey_cntr = attr.bad_pkey_cntr; resp.qkey_viol_cntr = attr.qkey_viol_cntr; resp.pkey_tbl_len = attr.pkey_tbl_len; resp.lid = attr.lid; resp.sm_lid = attr.sm_lid; resp.lmc = attr.lmc; resp.max_vl_num = attr.max_vl_num; resp.sm_sl = attr.sm_sl; resp.subnet_timeout = attr.subnet_timeout; resp.init_type_reply = attr.init_type_reply; resp.active_width = attr.active_width; resp.active_speed = attr.active_speed; resp.phys_state = attr.phys_state; if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) return -EFAULT; return in_len; } ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_alloc_pd cmd; struct ib_uverbs_alloc_pd_resp resp; struct ib_udata udata; struct ib_uobject *uobj; struct ib_pd *pd; int ret; if (out_len < sizeof resp) return -ENOSPC; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; INIT_UDATA(&udata, buf + sizeof cmd, (unsigned long) cmd.response + sizeof resp, in_len - sizeof cmd, out_len - sizeof resp); uobj = kmalloc(sizeof *uobj, GFP_KERNEL); if (!uobj) return -ENOMEM; uobj->context = file->ucontext; pd = file->device->ib_dev->alloc_pd(file->device->ib_dev, file->ucontext, &udata); if (IS_ERR(pd)) { ret = PTR_ERR(pd); goto err; } pd->device = file->device->ib_dev; pd->uobject = uobj; atomic_set(&pd->usecnt, 0); down(&ib_uverbs_idr_mutex); retry: if (!idr_pre_get(&ib_uverbs_pd_idr, GFP_KERNEL)) { ret = -ENOMEM; goto err_up; } ret = idr_get_new(&ib_uverbs_pd_idr, pd, &uobj->id); if (ret == -EAGAIN) goto retry; if (ret) goto err_up; memset(&resp, 0, sizeof resp); resp.pd_handle = uobj->id; if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) { ret = -EFAULT; goto err_idr; } down(&file->mutex); list_add_tail(&uobj->list, &file->ucontext->pd_list); up(&file->mutex); up(&ib_uverbs_idr_mutex); return in_len; err_idr: idr_remove(&ib_uverbs_pd_idr, uobj->id); err_up: up(&ib_uverbs_idr_mutex); ib_dealloc_pd(pd); err: kfree(uobj); return ret; } ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_dealloc_pd cmd; struct ib_pd *pd; struct ib_uobject *uobj; int ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; down(&ib_uverbs_idr_mutex); pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle); if (!pd || pd->uobject->context != file->ucontext) goto out; uobj = pd->uobject; ret = ib_dealloc_pd(pd); if (ret) goto out; idr_remove(&ib_uverbs_pd_idr, cmd.pd_handle); down(&file->mutex); list_del(&uobj->list); up(&file->mutex); kfree(uobj); out: up(&ib_uverbs_idr_mutex); return ret ? ret : in_len; } ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_reg_mr cmd; struct ib_uverbs_reg_mr_resp resp; struct ib_udata udata; struct ib_umem_object *obj; struct ib_pd *pd; struct ib_mr *mr; int ret; if (out_len < sizeof resp) return -ENOSPC; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; INIT_UDATA(&udata, buf + sizeof cmd, (unsigned long) cmd.response + sizeof resp, in_len - sizeof cmd, out_len - sizeof resp); if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) return -EINVAL; /* * Local write permission is required if remote write or * remote atomic permission is also requested. */ if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) && !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE)) return -EINVAL; obj = kmalloc(sizeof *obj, GFP_KERNEL); if (!obj) return -ENOMEM; obj->uobject.context = file->ucontext; /* * We ask for writable memory if any access flags other than * "remote read" are set. "Local write" and "remote write" * obviously require write access. "Remote atomic" can do * things like fetch and add, which will modify memory, and * "MW bind" can change permissions by binding a window. */ ret = ib_umem_get(file->device->ib_dev, &obj->umem, (void *) (unsigned long) cmd.start, cmd.length, !!(cmd.access_flags & ~IB_ACCESS_REMOTE_READ)); if (ret) goto err_free; obj->umem.virt_base = cmd.hca_va; down(&ib_uverbs_idr_mutex); pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle); if (!pd || pd->uobject->context != file->ucontext) { ret = -EINVAL; goto err_up; } if (!pd->device->reg_user_mr) { ret = -ENOSYS; goto err_up; } mr = pd->device->reg_user_mr(pd, &obj->umem, cmd.access_flags, &udata); if (IS_ERR(mr)) { ret = PTR_ERR(mr); goto err_up; } mr->device = pd->device; mr->pd = pd; mr->uobject = &obj->uobject; atomic_inc(&pd->usecnt); atomic_set(&mr->usecnt, 0); memset(&resp, 0, sizeof resp); resp.lkey = mr->lkey; resp.rkey = mr->rkey; retry: if (!idr_pre_get(&ib_uverbs_mr_idr, GFP_KERNEL)) { ret = -ENOMEM; goto err_unreg; } ret = idr_get_new(&ib_uverbs_mr_idr, mr, &obj->uobject.id); if (ret == -EAGAIN) goto retry; if (ret) goto err_unreg; resp.mr_handle = obj->uobject.id; if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) { ret = -EFAULT; goto err_idr; } down(&file->mutex); list_add_tail(&obj->uobject.list, &file->ucontext->mr_list); up(&file->mutex); up(&ib_uverbs_idr_mutex); return in_len; err_idr: idr_remove(&ib_uverbs_mr_idr, obj->uobject.id); err_unreg: ib_dereg_mr(mr); atomic_dec(&pd->usecnt); err_up: up(&ib_uverbs_idr_mutex); ib_umem_release(file->device->ib_dev, &obj->umem); err_free: kfree(obj); return ret; } ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_dereg_mr cmd; struct ib_mr *mr; struct ib_umem_object *memobj; int ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; down(&ib_uverbs_idr_mutex); mr = idr_find(&ib_uverbs_mr_idr, cmd.mr_handle); if (!mr || mr->uobject->context != file->ucontext) goto out; memobj = container_of(mr->uobject, struct ib_umem_object, uobject); ret = ib_dereg_mr(mr); if (ret) goto out; idr_remove(&ib_uverbs_mr_idr, cmd.mr_handle); down(&file->mutex); list_del(&memobj->uobject.list); up(&file->mutex); ib_umem_release(file->device->ib_dev, &memobj->umem); kfree(memobj); out: up(&ib_uverbs_idr_mutex); return ret ? ret : in_len; } ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_create_comp_channel cmd; struct ib_uverbs_create_comp_channel_resp resp; struct file *filp; if (out_len < sizeof resp) return -ENOSPC; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd); if (IS_ERR(filp)) return PTR_ERR(filp); if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) { put_unused_fd(resp.fd); fput(filp); return -EFAULT; } fd_install(resp.fd, filp); return in_len; } ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_create_cq cmd; struct ib_uverbs_create_cq_resp resp; struct ib_udata udata; struct ib_ucq_object *uobj; struct ib_uverbs_event_file *ev_file = NULL; struct ib_cq *cq; int ret; if (out_len < sizeof resp) return -ENOSPC; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; INIT_UDATA(&udata, buf + sizeof cmd, (unsigned long) cmd.response + sizeof resp, in_len - sizeof cmd, out_len - sizeof resp); if (cmd.comp_vector >= file->device->num_comp_vectors) return -EINVAL; if (cmd.comp_channel >= 0) ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel); uobj = kmalloc(sizeof *uobj, GFP_KERNEL); if (!uobj) return -ENOMEM; uobj->uobject.user_handle = cmd.user_handle; uobj->uobject.context = file->ucontext; uobj->uverbs_file = file; uobj->comp_events_reported = 0; uobj->async_events_reported = 0; INIT_LIST_HEAD(&uobj->comp_list); INIT_LIST_HEAD(&uobj->async_list); cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe, file->ucontext, &udata); if (IS_ERR(cq)) { ret = PTR_ERR(cq); goto err; } cq->device = file->device->ib_dev; cq->uobject = &uobj->uobject; cq->comp_handler = ib_uverbs_comp_handler; cq->event_handler = ib_uverbs_cq_event_handler; cq->cq_context = ev_file; atomic_set(&cq->usecnt, 0); down(&ib_uverbs_idr_mutex); retry: if (!idr_pre_get(&ib_uverbs_cq_idr, GFP_KERNEL)) { ret = -ENOMEM; goto err_up; } ret = idr_get_new(&ib_uverbs_cq_idr, cq, &uobj->uobject.id); if (ret == -EAGAIN) goto retry; if (ret) goto err_up; memset(&resp, 0, sizeof resp); resp.cq_handle = uobj->uobject.id; resp.cqe = cq->cqe; if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) { ret = -EFAULT; goto err_idr; } down(&file->mutex); list_add_tail(&uobj->uobject.list, &file->ucontext->cq_list); up(&file->mutex); up(&ib_uverbs_idr_mutex); return in_len; err_idr: idr_remove(&ib_uverbs_cq_idr, uobj->uobject.id); err_up: up(&ib_uverbs_idr_mutex); ib_destroy_cq(cq); err: kfree(uobj); return ret; } ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_poll_cq cmd; struct ib_uverbs_poll_cq_resp *resp; struct ib_cq *cq; struct ib_wc *wc; int ret = 0; int i; int rsize; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL); if (!wc) return -ENOMEM; rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc); resp = kmalloc(rsize, GFP_KERNEL); if (!resp) { ret = -ENOMEM; goto out_wc; } down(&ib_uverbs_idr_mutex); cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle); if (!cq || cq->uobject->context != file->ucontext) { ret = -EINVAL; goto out; } resp->count = ib_poll_cq(cq, cmd.ne, wc); for (i = 0; i < resp->count; i++) { resp->wc[i].wr_id = wc[i].wr_id; resp->wc[i].status = wc[i].status; resp->wc[i].opcode = wc[i].opcode; resp->wc[i].vendor_err = wc[i].vendor_err; resp->wc[i].byte_len = wc[i].byte_len; resp->wc[i].imm_data = (__u32 __force) wc[i].imm_data; resp->wc[i].qp_num = wc[i].qp_num; resp->wc[i].src_qp = wc[i].src_qp; resp->wc[i].wc_flags = wc[i].wc_flags; resp->wc[i].pkey_index = wc[i].pkey_index; resp->wc[i].slid = wc[i].slid; resp->wc[i].sl = wc[i].sl; resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits; resp->wc[i].port_num = wc[i].port_num; } if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize)) ret = -EFAULT; out: up(&ib_uverbs_idr_mutex); kfree(resp); out_wc: kfree(wc); return ret ? ret : in_len; } ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_req_notify_cq cmd; struct ib_cq *cq; int ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; down(&ib_uverbs_idr_mutex); cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle); if (cq && cq->uobject->context == file->ucontext) { ib_req_notify_cq(cq, cmd.solicited_only ? IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); ret = in_len; } up(&ib_uverbs_idr_mutex); return ret; } ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_destroy_cq cmd; struct ib_uverbs_destroy_cq_resp resp; struct ib_cq *cq; struct ib_ucq_object *uobj; struct ib_uverbs_event_file *ev_file; u64 user_handle; int ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; memset(&resp, 0, sizeof resp); down(&ib_uverbs_idr_mutex); cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle); if (!cq || cq->uobject->context != file->ucontext) goto out; user_handle = cq->uobject->user_handle; uobj = container_of(cq->uobject, struct ib_ucq_object, uobject); ev_file = cq->cq_context; ret = ib_destroy_cq(cq); if (ret) goto out; idr_remove(&ib_uverbs_cq_idr, cmd.cq_handle); down(&file->mutex); list_del(&uobj->uobject.list); up(&file->mutex); ib_uverbs_release_ucq(file, ev_file, uobj); resp.comp_events_reported = uobj->comp_events_reported; resp.async_events_reported = uobj->async_events_reported; kfree(uobj); if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) ret = -EFAULT; out: up(&ib_uverbs_idr_mutex); return ret ? ret : in_len; } ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_create_qp cmd; struct ib_uverbs_create_qp_resp resp; struct ib_udata udata; struct ib_uqp_object *uobj; struct ib_pd *pd; struct ib_cq *scq, *rcq; struct ib_srq *srq; struct ib_qp *qp; struct ib_qp_init_attr attr; int ret; if (out_len < sizeof resp) return -ENOSPC; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; INIT_UDATA(&udata, buf + sizeof cmd, (unsigned long) cmd.response + sizeof resp, in_len - sizeof cmd, out_len - sizeof resp); uobj = kmalloc(sizeof *uobj, GFP_KERNEL); if (!uobj) return -ENOMEM; down(&ib_uverbs_idr_mutex); pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle); scq = idr_find(&ib_uverbs_cq_idr, cmd.send_cq_handle); rcq = idr_find(&ib_uverbs_cq_idr, cmd.recv_cq_handle); srq = cmd.is_srq ? idr_find(&ib_uverbs_srq_idr, cmd.srq_handle) : NULL; if (!pd || pd->uobject->context != file->ucontext || !scq || scq->uobject->context != file->ucontext || !rcq || rcq->uobject->context != file->ucontext || (cmd.is_srq && (!srq || srq->uobject->context != file->ucontext))) { ret = -EINVAL; goto err_up; } attr.event_handler = ib_uverbs_qp_event_handler; attr.qp_context = file; attr.send_cq = scq; attr.recv_cq = rcq; attr.srq = srq; attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR; attr.qp_type = cmd.qp_type; attr.cap.max_send_wr = cmd.max_send_wr; attr.cap.max_recv_wr = cmd.max_recv_wr; attr.cap.max_send_sge = cmd.max_send_sge; attr.cap.max_recv_sge = cmd.max_recv_sge; attr.cap.max_inline_data = cmd.max_inline_data; uobj->uevent.uobject.user_handle = cmd.user_handle; uobj->uevent.uobject.context = file->ucontext; uobj->uevent.events_reported = 0; INIT_LIST_HEAD(&uobj->uevent.event_list); INIT_LIST_HEAD(&uobj->mcast_list); qp = pd->device->create_qp(pd, &attr, &udata); if (IS_ERR(qp)) { ret = PTR_ERR(qp); goto err_up; } qp->device = pd->device; qp->pd = pd; qp->send_cq = attr.send_cq; qp->recv_cq = attr.recv_cq; qp->srq = attr.srq; qp->uobject = &uobj->uevent.uobject; qp->event_handler = attr.event_handler; qp->qp_context = attr.qp_context; qp->qp_type = attr.qp_type; atomic_inc(&pd->usecnt); atomic_inc(&attr.send_cq->usecnt); atomic_inc(&attr.recv_cq->usecnt); if (attr.srq) atomic_inc(&attr.srq->usecnt); memset(&resp, 0, sizeof resp); resp.qpn = qp->qp_num; retry: if (!idr_pre_get(&ib_uverbs_qp_idr, GFP_KERNEL)) { ret = -ENOMEM; goto err_destroy; } ret = idr_get_new(&ib_uverbs_qp_idr, qp, &uobj->uevent.uobject.id); if (ret == -EAGAIN) goto retry; if (ret) goto err_destroy; resp.qp_handle = uobj->uevent.uobject.id; resp.max_recv_sge = attr.cap.max_recv_sge; resp.max_send_sge = attr.cap.max_send_sge; resp.max_recv_wr = attr.cap.max_recv_wr; resp.max_send_wr = attr.cap.max_send_wr; resp.max_inline_data = attr.cap.max_inline_data; if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) { ret = -EFAULT; goto err_idr; } down(&file->mutex); list_add_tail(&uobj->uevent.uobject.list, &file->ucontext->qp_list); up(&file->mutex); up(&ib_uverbs_idr_mutex); return in_len; err_idr: idr_remove(&ib_uverbs_qp_idr, uobj->uevent.uobject.id); err_destroy: ib_destroy_qp(qp); atomic_dec(&pd->usecnt); atomic_dec(&attr.send_cq->usecnt); atomic_dec(&attr.recv_cq->usecnt); if (attr.srq) atomic_dec(&attr.srq->usecnt); err_up: up(&ib_uverbs_idr_mutex); kfree(uobj); return ret; } ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_modify_qp cmd; struct ib_qp *qp; struct ib_qp_attr *attr; int ret; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; attr = kmalloc(sizeof *attr, GFP_KERNEL); if (!attr) return -ENOMEM; down(&ib_uverbs_idr_mutex); qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle); if (!qp || qp->uobject->context != file->ucontext) { ret = -EINVAL; goto out; } attr->qp_state = cmd.qp_state; attr->cur_qp_state = cmd.cur_qp_state; attr->path_mtu = cmd.path_mtu; attr->path_mig_state = cmd.path_mig_state; attr->qkey = cmd.qkey; attr->rq_psn = cmd.rq_psn; attr->sq_psn = cmd.sq_psn; attr->dest_qp_num = cmd.dest_qp_num; attr->qp_access_flags = cmd.qp_access_flags; attr->pkey_index = cmd.pkey_index; attr->alt_pkey_index = cmd.pkey_index; attr->en_sqd_async_notify = cmd.en_sqd_async_notify; attr->max_rd_atomic = cmd.max_rd_atomic; attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic; attr->min_rnr_timer = cmd.min_rnr_timer; attr->port_num = cmd.port_num; attr->timeout = cmd.timeout; attr->retry_cnt = cmd.retry_cnt; attr->rnr_retry = cmd.rnr_retry; attr->alt_port_num = cmd.alt_port_num; attr->alt_timeout = cmd.alt_timeout; memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16); attr->ah_attr.grh.flow_label = cmd.dest.flow_label; attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index; attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit; attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class; attr->ah_attr.dlid = cmd.dest.dlid; attr->ah_attr.sl = cmd.dest.sl; attr->ah_attr.src_path_bits = cmd.dest.src_path_bits; attr->ah_attr.static_rate = cmd.dest.static_rate; attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0; attr->ah_attr.port_num = cmd.dest.port_num; memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16); attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label; attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index; attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit; attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class; attr->alt_ah_attr.dlid = cmd.alt_dest.dlid; attr->alt_ah_attr.sl = cmd.alt_dest.sl; attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits; attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate; attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0; attr->alt_ah_attr.port_num = cmd.alt_dest.port_num; ret = ib_modify_qp(qp, attr, cmd.attr_mask); if (ret) goto out; ret = in_len; out: up(&ib_uverbs_idr_mutex); kfree(attr); return ret; } ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_destroy_qp cmd; struct ib_uverbs_destroy_qp_resp resp; struct ib_qp *qp; struct ib_uqp_object *uobj; int ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; memset(&resp, 0, sizeof resp); down(&ib_uverbs_idr_mutex); qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle); if (!qp || qp->uobject->context != file->ucontext) goto out; uobj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); if (!list_empty(&uobj->mcast_list)) { ret = -EBUSY; goto out; } ret = ib_destroy_qp(qp); if (ret) goto out; idr_remove(&ib_uverbs_qp_idr, cmd.qp_handle); down(&file->mutex); list_del(&uobj->uevent.uobject.list); up(&file->mutex); ib_uverbs_release_uevent(file, &uobj->uevent); resp.events_reported = uobj->uevent.events_reported; kfree(uobj); if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) ret = -EFAULT; out: up(&ib_uverbs_idr_mutex); return ret ? ret : in_len; } ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_post_send cmd; struct ib_uverbs_post_send_resp resp; struct ib_uverbs_send_wr *user_wr; struct ib_send_wr *wr = NULL, *last, *next, *bad_wr; struct ib_qp *qp; int i, sg_ind; ssize_t ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count + cmd.sge_count * sizeof (struct ib_uverbs_sge)) return -EINVAL; if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr)) return -EINVAL; user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL); if (!user_wr) return -ENOMEM; down(&ib_uverbs_idr_mutex); qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle); if (!qp || qp->uobject->context != file->ucontext) goto out; sg_ind = 0; last = NULL; for (i = 0; i < cmd.wr_count; ++i) { if (copy_from_user(user_wr, buf + sizeof cmd + i * cmd.wqe_size, cmd.wqe_size)) { ret = -EFAULT; goto out; } if (user_wr->num_sge + sg_ind > cmd.sge_count) { ret = -EINVAL; goto out; } next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) + user_wr->num_sge * sizeof (struct ib_sge), GFP_KERNEL); if (!next) { ret = -ENOMEM; goto out; } if (!last) wr = next; else last->next = next; last = next; next->next = NULL; next->wr_id = user_wr->wr_id; next->num_sge = user_wr->num_sge; next->opcode = user_wr->opcode; next->send_flags = user_wr->send_flags; next->imm_data = (__be32 __force) user_wr->imm_data; if (qp->qp_type == IB_QPT_UD) { next->wr.ud.ah = idr_find(&ib_uverbs_ah_idr, user_wr->wr.ud.ah); if (!next->wr.ud.ah) { ret = -EINVAL; goto out; } next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn; next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey; } else { switch (next->opcode) { case IB_WR_RDMA_WRITE: case IB_WR_RDMA_WRITE_WITH_IMM: case IB_WR_RDMA_READ: next->wr.rdma.remote_addr = user_wr->wr.rdma.remote_addr; next->wr.rdma.rkey = user_wr->wr.rdma.rkey; break; case IB_WR_ATOMIC_CMP_AND_SWP: case IB_WR_ATOMIC_FETCH_AND_ADD: next->wr.atomic.remote_addr = user_wr->wr.atomic.remote_addr; next->wr.atomic.compare_add = user_wr->wr.atomic.compare_add; next->wr.atomic.swap = user_wr->wr.atomic.swap; next->wr.atomic.rkey = user_wr->wr.atomic.rkey; break; default: break; } } if (next->num_sge) { next->sg_list = (void *) next + ALIGN(sizeof *next, sizeof (struct ib_sge)); if (copy_from_user(next->sg_list, buf + sizeof cmd + cmd.wr_count * cmd.wqe_size + sg_ind * sizeof (struct ib_sge), next->num_sge * sizeof (struct ib_sge))) { ret = -EFAULT; goto out; } sg_ind += next->num_sge; } else next->sg_list = NULL; } resp.bad_wr = 0; ret = qp->device->post_send(qp, wr, &bad_wr); if (ret) for (next = wr; next; next = next->next) { ++resp.bad_wr; if (next == bad_wr) break; } if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) ret = -EFAULT; out: up(&ib_uverbs_idr_mutex); while (wr) { next = wr->next; kfree(wr); wr = next; } kfree(user_wr); return ret ? ret : in_len; } static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf, int in_len, u32 wr_count, u32 sge_count, u32 wqe_size) { struct ib_uverbs_recv_wr *user_wr; struct ib_recv_wr *wr = NULL, *last, *next; int sg_ind; int i; int ret; if (in_len < wqe_size * wr_count + sge_count * sizeof (struct ib_uverbs_sge)) return ERR_PTR(-EINVAL); if (wqe_size < sizeof (struct ib_uverbs_recv_wr)) return ERR_PTR(-EINVAL); user_wr = kmalloc(wqe_size, GFP_KERNEL); if (!user_wr) return ERR_PTR(-ENOMEM); sg_ind = 0; last = NULL; for (i = 0; i < wr_count; ++i) { if (copy_from_user(user_wr, buf + i * wqe_size, wqe_size)) { ret = -EFAULT; goto err; } if (user_wr->num_sge + sg_ind > sge_count) { ret = -EINVAL; goto err; } next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) + user_wr->num_sge * sizeof (struct ib_sge), GFP_KERNEL); if (!next) { ret = -ENOMEM; goto err; } if (!last) wr = next; else last->next = next; last = next; next->next = NULL; next->wr_id = user_wr->wr_id; next->num_sge = user_wr->num_sge; if (next->num_sge) { next->sg_list = (void *) next + ALIGN(sizeof *next, sizeof (struct ib_sge)); if (copy_from_user(next->sg_list, buf + wr_count * wqe_size + sg_ind * sizeof (struct ib_sge), next->num_sge * sizeof (struct ib_sge))) { ret = -EFAULT; goto err; } sg_ind += next->num_sge; } else next->sg_list = NULL; } kfree(user_wr); return wr; err: kfree(user_wr); while (wr) { next = wr->next; kfree(wr); wr = next; } return ERR_PTR(ret); } ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_post_recv cmd; struct ib_uverbs_post_recv_resp resp; struct ib_recv_wr *wr, *next, *bad_wr; struct ib_qp *qp; ssize_t ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd, in_len - sizeof cmd, cmd.wr_count, cmd.sge_count, cmd.wqe_size); if (IS_ERR(wr)) return PTR_ERR(wr); down(&ib_uverbs_idr_mutex); qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle); if (!qp || qp->uobject->context != file->ucontext) goto out; resp.bad_wr = 0; ret = qp->device->post_recv(qp, wr, &bad_wr); if (ret) for (next = wr; next; next = next->next) { ++resp.bad_wr; if (next == bad_wr) break; } if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) ret = -EFAULT; out: up(&ib_uverbs_idr_mutex); while (wr) { next = wr->next; kfree(wr); wr = next; } return ret ? ret : in_len; } ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_post_srq_recv cmd; struct ib_uverbs_post_srq_recv_resp resp; struct ib_recv_wr *wr, *next, *bad_wr; struct ib_srq *srq; ssize_t ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd, in_len - sizeof cmd, cmd.wr_count, cmd.sge_count, cmd.wqe_size); if (IS_ERR(wr)) return PTR_ERR(wr); down(&ib_uverbs_idr_mutex); srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle); if (!srq || srq->uobject->context != file->ucontext) goto out; resp.bad_wr = 0; ret = srq->device->post_srq_recv(srq, wr, &bad_wr); if (ret) for (next = wr; next; next = next->next) { ++resp.bad_wr; if (next == bad_wr) break; } if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) ret = -EFAULT; out: up(&ib_uverbs_idr_mutex); while (wr) { next = wr->next; kfree(wr); wr = next; } return ret ? ret : in_len; } ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_create_ah cmd; struct ib_uverbs_create_ah_resp resp; struct ib_uobject *uobj; struct ib_pd *pd; struct ib_ah *ah; struct ib_ah_attr attr; int ret; if (out_len < sizeof resp) return -ENOSPC; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; uobj = kmalloc(sizeof *uobj, GFP_KERNEL); if (!uobj) return -ENOMEM; down(&ib_uverbs_idr_mutex); pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle); if (!pd || pd->uobject->context != file->ucontext) { ret = -EINVAL; goto err_up; } uobj->user_handle = cmd.user_handle; uobj->context = file->ucontext; attr.dlid = cmd.attr.dlid; attr.sl = cmd.attr.sl; attr.src_path_bits = cmd.attr.src_path_bits; attr.static_rate = cmd.attr.static_rate; attr.port_num = cmd.attr.port_num; attr.grh.flow_label = cmd.attr.grh.flow_label; attr.grh.sgid_index = cmd.attr.grh.sgid_index; attr.grh.hop_limit = cmd.attr.grh.hop_limit; attr.grh.traffic_class = cmd.attr.grh.traffic_class; memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16); ah = ib_create_ah(pd, &attr); if (IS_ERR(ah)) { ret = PTR_ERR(ah); goto err_up; } ah->uobject = uobj; retry: if (!idr_pre_get(&ib_uverbs_ah_idr, GFP_KERNEL)) { ret = -ENOMEM; goto err_destroy; } ret = idr_get_new(&ib_uverbs_ah_idr, ah, &uobj->id); if (ret == -EAGAIN) goto retry; if (ret) goto err_destroy; resp.ah_handle = uobj->id; if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) { ret = -EFAULT; goto err_idr; } down(&file->mutex); list_add_tail(&uobj->list, &file->ucontext->ah_list); up(&file->mutex); up(&ib_uverbs_idr_mutex); return in_len; err_idr: idr_remove(&ib_uverbs_ah_idr, uobj->id); err_destroy: ib_destroy_ah(ah); err_up: up(&ib_uverbs_idr_mutex); kfree(uobj); return ret; } ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_destroy_ah cmd; struct ib_ah *ah; struct ib_uobject *uobj; int ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; down(&ib_uverbs_idr_mutex); ah = idr_find(&ib_uverbs_ah_idr, cmd.ah_handle); if (!ah || ah->uobject->context != file->ucontext) goto out; uobj = ah->uobject; ret = ib_destroy_ah(ah); if (ret) goto out; idr_remove(&ib_uverbs_ah_idr, cmd.ah_handle); down(&file->mutex); list_del(&uobj->list); up(&file->mutex); kfree(uobj); out: up(&ib_uverbs_idr_mutex); return ret ? ret : in_len; } ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_attach_mcast cmd; struct ib_qp *qp; struct ib_uqp_object *uobj; struct ib_uverbs_mcast_entry *mcast; int ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; down(&ib_uverbs_idr_mutex); qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle); if (!qp || qp->uobject->context != file->ucontext) goto out; uobj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); list_for_each_entry(mcast, &uobj->mcast_list, list) if (cmd.mlid == mcast->lid && !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { ret = 0; goto out; } mcast = kmalloc(sizeof *mcast, GFP_KERNEL); if (!mcast) { ret = -ENOMEM; goto out; } mcast->lid = cmd.mlid; memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw); ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid); if (!ret) { uobj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); list_add_tail(&mcast->list, &uobj->mcast_list); } else kfree(mcast); out: up(&ib_uverbs_idr_mutex); return ret ? ret : in_len; } ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_detach_mcast cmd; struct ib_uqp_object *uobj; struct ib_qp *qp; struct ib_uverbs_mcast_entry *mcast; int ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; down(&ib_uverbs_idr_mutex); qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle); if (!qp || qp->uobject->context != file->ucontext) goto out; ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid); if (ret) goto out; uobj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); list_for_each_entry(mcast, &uobj->mcast_list, list) if (cmd.mlid == mcast->lid && !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { list_del(&mcast->list); kfree(mcast); break; } out: up(&ib_uverbs_idr_mutex); return ret ? ret : in_len; } ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_create_srq cmd; struct ib_uverbs_create_srq_resp resp; struct ib_udata udata; struct ib_uevent_object *uobj; struct ib_pd *pd; struct ib_srq *srq; struct ib_srq_init_attr attr; int ret; if (out_len < sizeof resp) return -ENOSPC; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; INIT_UDATA(&udata, buf + sizeof cmd, (unsigned long) cmd.response + sizeof resp, in_len - sizeof cmd, out_len - sizeof resp); uobj = kmalloc(sizeof *uobj, GFP_KERNEL); if (!uobj) return -ENOMEM; down(&ib_uverbs_idr_mutex); pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle); if (!pd || pd->uobject->context != file->ucontext) { ret = -EINVAL; goto err_up; } attr.event_handler = ib_uverbs_srq_event_handler; attr.srq_context = file; attr.attr.max_wr = cmd.max_wr; attr.attr.max_sge = cmd.max_sge; attr.attr.srq_limit = cmd.srq_limit; uobj->uobject.user_handle = cmd.user_handle; uobj->uobject.context = file->ucontext; uobj->events_reported = 0; INIT_LIST_HEAD(&uobj->event_list); srq = pd->device->create_srq(pd, &attr, &udata); if (IS_ERR(srq)) { ret = PTR_ERR(srq); goto err_up; } srq->device = pd->device; srq->pd = pd; srq->uobject = &uobj->uobject; srq->event_handler = attr.event_handler; srq->srq_context = attr.srq_context; atomic_inc(&pd->usecnt); atomic_set(&srq->usecnt, 0); memset(&resp, 0, sizeof resp); retry: if (!idr_pre_get(&ib_uverbs_srq_idr, GFP_KERNEL)) { ret = -ENOMEM; goto err_destroy; } ret = idr_get_new(&ib_uverbs_srq_idr, srq, &uobj->uobject.id); if (ret == -EAGAIN) goto retry; if (ret) goto err_destroy; resp.srq_handle = uobj->uobject.id; if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) { ret = -EFAULT; goto err_idr; } down(&file->mutex); list_add_tail(&uobj->uobject.list, &file->ucontext->srq_list); up(&file->mutex); up(&ib_uverbs_idr_mutex); return in_len; err_idr: idr_remove(&ib_uverbs_srq_idr, uobj->uobject.id); err_destroy: ib_destroy_srq(srq); atomic_dec(&pd->usecnt); err_up: up(&ib_uverbs_idr_mutex); kfree(uobj); return ret; } ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_modify_srq cmd; struct ib_srq *srq; struct ib_srq_attr attr; int ret; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; down(&ib_uverbs_idr_mutex); srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle); if (!srq || srq->uobject->context != file->ucontext) { ret = -EINVAL; goto out; } attr.max_wr = cmd.max_wr; attr.srq_limit = cmd.srq_limit; ret = ib_modify_srq(srq, &attr, cmd.attr_mask); out: up(&ib_uverbs_idr_mutex); return ret ? ret : in_len; } ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_destroy_srq cmd; struct ib_uverbs_destroy_srq_resp resp; struct ib_srq *srq; struct ib_uevent_object *uobj; int ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; down(&ib_uverbs_idr_mutex); memset(&resp, 0, sizeof resp); srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle); if (!srq || srq->uobject->context != file->ucontext) goto out; uobj = container_of(srq->uobject, struct ib_uevent_object, uobject); ret = ib_destroy_srq(srq); if (ret) goto out; idr_remove(&ib_uverbs_srq_idr, cmd.srq_handle); down(&file->mutex); list_del(&uobj->uobject.list); up(&file->mutex); ib_uverbs_release_uevent(file, uobj); resp.events_reported = uobj->events_reported; kfree(uobj); if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) ret = -EFAULT; out: up(&ib_uverbs_idr_mutex); return ret ? ret : in_len; }