/* * Copyright (c) 2005 Topspin Communications. All rights reserved. * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved. * Copyright (c) 2005 PathScale, Inc. All rights reserved. * Copyright (c) 2006 Mellanox Technologies. 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 #include #include #include #include #include "uverbs.h" #include "core_priv.h" struct uverbs_lock_class { struct lock_class_key key; char name[16]; }; static struct uverbs_lock_class pd_lock_class = { .name = "PD-uobj" }; static struct uverbs_lock_class mr_lock_class = { .name = "MR-uobj" }; static struct uverbs_lock_class mw_lock_class = { .name = "MW-uobj" }; static struct uverbs_lock_class cq_lock_class = { .name = "CQ-uobj" }; static struct uverbs_lock_class qp_lock_class = { .name = "QP-uobj" }; static struct uverbs_lock_class ah_lock_class = { .name = "AH-uobj" }; static struct uverbs_lock_class srq_lock_class = { .name = "SRQ-uobj" }; static struct uverbs_lock_class xrcd_lock_class = { .name = "XRCD-uobj" }; static struct uverbs_lock_class rule_lock_class = { .name = "RULE-uobj" }; /* * The ib_uobject locking scheme is as follows: * * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it * needs to be held during all idr operations. When an object is * looked up, a reference must be taken on the object's kref before * dropping this lock. * * - Each object also has an rwsem. This rwsem must be held for * reading while an operation that uses the object is performed. * For example, while registering an MR, the associated PD's * uobject.mutex must be held for reading. The rwsem must be held * for writing while initializing or destroying an object. * * - In addition, each object has a "live" flag. If this flag is not * set, then lookups of the object will fail even if it is found in * the idr. This handles a reader that blocks and does not acquire * the rwsem until after the object is destroyed. The destroy * operation will set the live flag to 0 and then drop the rwsem; * this will allow the reader to acquire the rwsem, see that the * live flag is 0, and then drop the rwsem and its reference to * object. The underlying storage will not be freed until the last * reference to the object is dropped. */ static void init_uobj(struct ib_uobject *uobj, u64 user_handle, struct ib_ucontext *context, struct uverbs_lock_class *c) { uobj->user_handle = user_handle; uobj->context = context; kref_init(&uobj->ref); init_rwsem(&uobj->mutex); lockdep_set_class_and_name(&uobj->mutex, &c->key, c->name); uobj->live = 0; } static void release_uobj(struct kref *kref) { kfree(container_of(kref, struct ib_uobject, ref)); } static void put_uobj(struct ib_uobject *uobj) { kref_put(&uobj->ref, release_uobj); } static void put_uobj_read(struct ib_uobject *uobj) { up_read(&uobj->mutex); put_uobj(uobj); } static void put_uobj_write(struct ib_uobject *uobj) { up_write(&uobj->mutex); put_uobj(uobj); } static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj) { int ret; idr_preload(GFP_KERNEL); spin_lock(&ib_uverbs_idr_lock); ret = idr_alloc(idr, uobj, 0, 0, GFP_NOWAIT); if (ret >= 0) uobj->id = ret; spin_unlock(&ib_uverbs_idr_lock); idr_preload_end(); return ret < 0 ? ret : 0; } void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj) { spin_lock(&ib_uverbs_idr_lock); idr_remove(idr, uobj->id); spin_unlock(&ib_uverbs_idr_lock); } static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id, struct ib_ucontext *context) { struct ib_uobject *uobj; spin_lock(&ib_uverbs_idr_lock); uobj = idr_find(idr, id); if (uobj) { if (uobj->context == context) kref_get(&uobj->ref); else uobj = NULL; } spin_unlock(&ib_uverbs_idr_lock); return uobj; } static struct ib_uobject *idr_read_uobj(struct idr *idr, int id, struct ib_ucontext *context, int nested) { struct ib_uobject *uobj; uobj = __idr_get_uobj(idr, id, context); if (!uobj) return NULL; if (nested) down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING); else down_read(&uobj->mutex); if (!uobj->live) { put_uobj_read(uobj); return NULL; } return uobj; } static struct ib_uobject *idr_write_uobj(struct idr *idr, int id, struct ib_ucontext *context) { struct ib_uobject *uobj; uobj = __idr_get_uobj(idr, id, context); if (!uobj) return NULL; down_write(&uobj->mutex); if (!uobj->live) { put_uobj_write(uobj); return NULL; } return uobj; } static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context, int nested) { struct ib_uobject *uobj; uobj = idr_read_uobj(idr, id, context, nested); return uobj ? uobj->object : NULL; } static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context) { return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0); } static void put_pd_read(struct ib_pd *pd) { put_uobj_read(pd->uobject); } static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested) { return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested); } static void put_cq_read(struct ib_cq *cq) { put_uobj_read(cq->uobject); } static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context) { return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0); } static void put_ah_read(struct ib_ah *ah) { put_uobj_read(ah->uobject); } static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context) { return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0); } static struct ib_qp *idr_write_qp(int qp_handle, struct ib_ucontext *context) { struct ib_uobject *uobj; uobj = idr_write_uobj(&ib_uverbs_qp_idr, qp_handle, context); return uobj ? uobj->object : NULL; } static void put_qp_read(struct ib_qp *qp) { put_uobj_read(qp->uobject); } static void put_qp_write(struct ib_qp *qp) { put_uobj_write(qp->uobject); } static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context) { return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0); } static void put_srq_read(struct ib_srq *srq) { put_uobj_read(srq->uobject); } static struct ib_xrcd *idr_read_xrcd(int xrcd_handle, struct ib_ucontext *context, struct ib_uobject **uobj) { *uobj = idr_read_uobj(&ib_uverbs_xrcd_idr, xrcd_handle, context, 0); return *uobj ? (*uobj)->object : NULL; } static void put_xrcd_read(struct ib_uobject *uobj) { put_uobj_read(uobj); } 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; #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING struct ib_device_attr dev_attr; #endif 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; mutex_lock(&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)) { ret = PTR_ERR(ucontext); goto err; } 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); INIT_LIST_HEAD(&ucontext->xrcd_list); INIT_LIST_HEAD(&ucontext->rule_list); rcu_read_lock(); ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID); rcu_read_unlock(); ucontext->closing = 0; #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING ucontext->umem_tree = RB_ROOT; init_rwsem(&ucontext->umem_rwsem); ucontext->odp_mrs_count = 0; INIT_LIST_HEAD(&ucontext->no_private_counters); ret = ib_query_device(ibdev, &dev_attr); if (ret) goto err_free; if (!(dev_attr.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING)) ucontext->invalidate_range = NULL; #endif resp.num_comp_vectors = file->device->num_comp_vectors; ret = get_unused_fd_flags(O_CLOEXEC); if (ret < 0) goto err_free; resp.async_fd = ret; filp = ib_uverbs_alloc_event_file(file, 1); if (IS_ERR(filp)) { ret = PTR_ERR(filp); goto err_fd; } 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); mutex_unlock(&file->mutex); return in_len; err_file: fput(filp); err_fd: put_unused_fd(resp.async_fd); err_free: put_pid(ucontext->tgid); ibdev->dealloc_ucontext(ucontext); err: mutex_unlock(&file->mutex); return ret; } static void copy_query_dev_fields(struct ib_uverbs_file *file, struct ib_uverbs_query_device_resp *resp, struct ib_device_attr *attr) { resp->fw_ver = attr->fw_ver; resp->node_guid = file->device->ib_dev->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; } 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); copy_query_dev_fields(file, &resp, &attr); 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; resp.link_layer = rdma_port_get_link_layer(file->device->ib_dev, cmd.port_num); 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; init_uobj(uobj, 0, file->ucontext, &pd_lock_class); down_write(&uobj->mutex); 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); uobj->object = pd; ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj); if (ret) goto err_idr; 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_copy; } mutex_lock(&file->mutex); list_add_tail(&uobj->list, &file->ucontext->pd_list); mutex_unlock(&file->mutex); uobj->live = 1; up_write(&uobj->mutex); return in_len; err_copy: idr_remove_uobj(&ib_uverbs_pd_idr, uobj); err_idr: ib_dealloc_pd(pd); err: put_uobj_write(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_uobject *uobj; int ret; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext); if (!uobj) return -EINVAL; ret = ib_dealloc_pd(uobj->object); if (!ret) uobj->live = 0; put_uobj_write(uobj); if (ret) return ret; idr_remove_uobj(&ib_uverbs_pd_idr, uobj); mutex_lock(&file->mutex); list_del(&uobj->list); mutex_unlock(&file->mutex); put_uobj(uobj); return in_len; } struct xrcd_table_entry { struct rb_node node; struct ib_xrcd *xrcd; struct inode *inode; }; static int xrcd_table_insert(struct ib_uverbs_device *dev, struct inode *inode, struct ib_xrcd *xrcd) { struct xrcd_table_entry *entry, *scan; struct rb_node **p = &dev->xrcd_tree.rb_node; struct rb_node *parent = NULL; entry = kmalloc(sizeof *entry, GFP_KERNEL); if (!entry) return -ENOMEM; entry->xrcd = xrcd; entry->inode = inode; while (*p) { parent = *p; scan = rb_entry(parent, struct xrcd_table_entry, node); if (inode < scan->inode) { p = &(*p)->rb_left; } else if (inode > scan->inode) { p = &(*p)->rb_right; } else { kfree(entry); return -EEXIST; } } rb_link_node(&entry->node, parent, p); rb_insert_color(&entry->node, &dev->xrcd_tree); igrab(inode); return 0; } static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev, struct inode *inode) { struct xrcd_table_entry *entry; struct rb_node *p = dev->xrcd_tree.rb_node; while (p) { entry = rb_entry(p, struct xrcd_table_entry, node); if (inode < entry->inode) p = p->rb_left; else if (inode > entry->inode) p = p->rb_right; else return entry; } return NULL; } static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode) { struct xrcd_table_entry *entry; entry = xrcd_table_search(dev, inode); if (!entry) return NULL; return entry->xrcd; } static void xrcd_table_delete(struct ib_uverbs_device *dev, struct inode *inode) { struct xrcd_table_entry *entry; entry = xrcd_table_search(dev, inode); if (entry) { iput(inode); rb_erase(&entry->node, &dev->xrcd_tree); kfree(entry); } } ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_open_xrcd cmd; struct ib_uverbs_open_xrcd_resp resp; struct ib_udata udata; struct ib_uxrcd_object *obj; struct ib_xrcd *xrcd = NULL; struct fd f = {NULL, 0}; struct inode *inode = NULL; int ret = 0; int new_xrcd = 0; 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); mutex_lock(&file->device->xrcd_tree_mutex); if (cmd.fd != -1) { /* search for file descriptor */ f = fdget(cmd.fd); if (!f.file) { ret = -EBADF; goto err_tree_mutex_unlock; } inode = file_inode(f.file); xrcd = find_xrcd(file->device, inode); if (!xrcd && !(cmd.oflags & O_CREAT)) { /* no file descriptor. Need CREATE flag */ ret = -EAGAIN; goto err_tree_mutex_unlock; } if (xrcd && cmd.oflags & O_EXCL) { ret = -EINVAL; goto err_tree_mutex_unlock; } } obj = kmalloc(sizeof *obj, GFP_KERNEL); if (!obj) { ret = -ENOMEM; goto err_tree_mutex_unlock; } init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class); down_write(&obj->uobject.mutex); if (!xrcd) { xrcd = file->device->ib_dev->alloc_xrcd(file->device->ib_dev, file->ucontext, &udata); if (IS_ERR(xrcd)) { ret = PTR_ERR(xrcd); goto err; } xrcd->inode = inode; xrcd->device = file->device->ib_dev; atomic_set(&xrcd->usecnt, 0); mutex_init(&xrcd->tgt_qp_mutex); INIT_LIST_HEAD(&xrcd->tgt_qp_list); new_xrcd = 1; } atomic_set(&obj->refcnt, 0); obj->uobject.object = xrcd; ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject); if (ret) goto err_idr; memset(&resp, 0, sizeof resp); resp.xrcd_handle = obj->uobject.id; if (inode) { if (new_xrcd) { /* create new inode/xrcd table entry */ ret = xrcd_table_insert(file->device, inode, xrcd); if (ret) goto err_insert_xrcd; } atomic_inc(&xrcd->usecnt); } if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) { ret = -EFAULT; goto err_copy; } if (f.file) fdput(f); mutex_lock(&file->mutex); list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list); mutex_unlock(&file->mutex); obj->uobject.live = 1; up_write(&obj->uobject.mutex); mutex_unlock(&file->device->xrcd_tree_mutex); return in_len; err_copy: if (inode) { if (new_xrcd) xrcd_table_delete(file->device, inode); atomic_dec(&xrcd->usecnt); } err_insert_xrcd: idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject); err_idr: ib_dealloc_xrcd(xrcd); err: put_uobj_write(&obj->uobject); err_tree_mutex_unlock: if (f.file) fdput(f); mutex_unlock(&file->device->xrcd_tree_mutex); return ret; } ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_close_xrcd cmd; struct ib_uobject *uobj; struct ib_xrcd *xrcd = NULL; struct inode *inode = NULL; struct ib_uxrcd_object *obj; int live; int ret = 0; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; mutex_lock(&file->device->xrcd_tree_mutex); uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext); if (!uobj) { ret = -EINVAL; goto out; } xrcd = uobj->object; inode = xrcd->inode; obj = container_of(uobj, struct ib_uxrcd_object, uobject); if (atomic_read(&obj->refcnt)) { put_uobj_write(uobj); ret = -EBUSY; goto out; } if (!inode || atomic_dec_and_test(&xrcd->usecnt)) { ret = ib_dealloc_xrcd(uobj->object); if (!ret) uobj->live = 0; } live = uobj->live; if (inode && ret) atomic_inc(&xrcd->usecnt); put_uobj_write(uobj); if (ret) goto out; if (inode && !live) xrcd_table_delete(file->device, inode); idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj); mutex_lock(&file->mutex); list_del(&uobj->list); mutex_unlock(&file->mutex); put_uobj(uobj); ret = in_len; out: mutex_unlock(&file->device->xrcd_tree_mutex); return ret; } void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev, struct ib_xrcd *xrcd) { struct inode *inode; inode = xrcd->inode; if (inode && !atomic_dec_and_test(&xrcd->usecnt)) return; ib_dealloc_xrcd(xrcd); if (inode) xrcd_table_delete(dev, inode); } 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_uobject *uobj; 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; ret = ib_check_mr_access(cmd.access_flags); if (ret) return ret; uobj = kmalloc(sizeof *uobj, GFP_KERNEL); if (!uobj) return -ENOMEM; init_uobj(uobj, 0, file->ucontext, &mr_lock_class); down_write(&uobj->mutex); pd = idr_read_pd(cmd.pd_handle, file->ucontext); if (!pd) { ret = -EINVAL; goto err_free; } if (cmd.access_flags & IB_ACCESS_ON_DEMAND) { struct ib_device_attr attr; ret = ib_query_device(pd->device, &attr); if (ret || !(attr.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING)) { pr_debug("ODP support not available\n"); ret = -EINVAL; goto err_put; } } mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va, cmd.access_flags, &udata); if (IS_ERR(mr)) { ret = PTR_ERR(mr); goto err_put; } mr->device = pd->device; mr->pd = pd; mr->uobject = uobj; atomic_inc(&pd->usecnt); atomic_set(&mr->usecnt, 0); uobj->object = mr; ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj); if (ret) goto err_unreg; memset(&resp, 0, sizeof resp); resp.lkey = mr->lkey; resp.rkey = mr->rkey; resp.mr_handle = uobj->id; if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) { ret = -EFAULT; goto err_copy; } put_pd_read(pd); mutex_lock(&file->mutex); list_add_tail(&uobj->list, &file->ucontext->mr_list); mutex_unlock(&file->mutex); uobj->live = 1; up_write(&uobj->mutex); return in_len; err_copy: idr_remove_uobj(&ib_uverbs_mr_idr, uobj); err_unreg: ib_dereg_mr(mr); err_put: put_pd_read(pd); err_free: put_uobj_write(uobj); return ret; } ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_rereg_mr cmd; struct ib_uverbs_rereg_mr_resp resp; struct ib_udata udata; struct ib_pd *pd = NULL; struct ib_mr *mr; struct ib_pd *old_pd; int ret; struct ib_uobject *uobj; 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.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags) return -EINVAL; if ((cmd.flags & IB_MR_REREG_TRANS) && (!cmd.start || !cmd.hca_va || 0 >= cmd.length || (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))) return -EINVAL; uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext); if (!uobj) return -EINVAL; mr = uobj->object; if (cmd.flags & IB_MR_REREG_ACCESS) { ret = ib_check_mr_access(cmd.access_flags); if (ret) goto put_uobjs; } if (cmd.flags & IB_MR_REREG_PD) { pd = idr_read_pd(cmd.pd_handle, file->ucontext); if (!pd) { ret = -EINVAL; goto put_uobjs; } } if (atomic_read(&mr->usecnt)) { ret = -EBUSY; goto put_uobj_pd; } old_pd = mr->pd; ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start, cmd.length, cmd.hca_va, cmd.access_flags, pd, &udata); if (!ret) { if (cmd.flags & IB_MR_REREG_PD) { atomic_inc(&pd->usecnt); mr->pd = pd; atomic_dec(&old_pd->usecnt); } } else { goto put_uobj_pd; } memset(&resp, 0, sizeof(resp)); resp.lkey = mr->lkey; resp.rkey = mr->rkey; if (copy_to_user((void __user *)(unsigned long)cmd.response, &resp, sizeof(resp))) ret = -EFAULT; else ret = in_len; put_uobj_pd: if (cmd.flags & IB_MR_REREG_PD) put_pd_read(pd); put_uobjs: put_uobj_write(mr->uobject); 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_uobject *uobj; int ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext); if (!uobj) return -EINVAL; mr = uobj->object; ret = ib_dereg_mr(mr); if (!ret) uobj->live = 0; put_uobj_write(uobj); if (ret) return ret; idr_remove_uobj(&ib_uverbs_mr_idr, uobj); mutex_lock(&file->mutex); list_del(&uobj->list); mutex_unlock(&file->mutex); put_uobj(uobj); return in_len; } ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_alloc_mw cmd; struct ib_uverbs_alloc_mw_resp resp; struct ib_uobject *uobj; struct ib_pd *pd; struct ib_mw *mw; 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; init_uobj(uobj, 0, file->ucontext, &mw_lock_class); down_write(&uobj->mutex); pd = idr_read_pd(cmd.pd_handle, file->ucontext); if (!pd) { ret = -EINVAL; goto err_free; } mw = pd->device->alloc_mw(pd, cmd.mw_type); if (IS_ERR(mw)) { ret = PTR_ERR(mw); goto err_put; } mw->device = pd->device; mw->pd = pd; mw->uobject = uobj; atomic_inc(&pd->usecnt); uobj->object = mw; ret = idr_add_uobj(&ib_uverbs_mw_idr, uobj); if (ret) goto err_unalloc; memset(&resp, 0, sizeof(resp)); resp.rkey = mw->rkey; resp.mw_handle = uobj->id; if (copy_to_user((void __user *)(unsigned long)cmd.response, &resp, sizeof(resp))) { ret = -EFAULT; goto err_copy; } put_pd_read(pd); mutex_lock(&file->mutex); list_add_tail(&uobj->list, &file->ucontext->mw_list); mutex_unlock(&file->mutex); uobj->live = 1; up_write(&uobj->mutex); return in_len; err_copy: idr_remove_uobj(&ib_uverbs_mw_idr, uobj); err_unalloc: ib_dealloc_mw(mw); err_put: put_pd_read(pd); err_free: put_uobj_write(uobj); return ret; } ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_dealloc_mw cmd; struct ib_mw *mw; struct ib_uobject *uobj; int ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof(cmd))) return -EFAULT; uobj = idr_write_uobj(&ib_uverbs_mw_idr, cmd.mw_handle, file->ucontext); if (!uobj) return -EINVAL; mw = uobj->object; ret = ib_dealloc_mw(mw); if (!ret) uobj->live = 0; put_uobj_write(uobj); if (ret) return ret; idr_remove_uobj(&ib_uverbs_mw_idr, uobj); mutex_lock(&file->mutex); list_del(&uobj->list); mutex_unlock(&file->mutex); put_uobj(uobj); return 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; int ret; if (out_len < sizeof resp) return -ENOSPC; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; ret = get_unused_fd_flags(O_CLOEXEC); if (ret < 0) return ret; resp.fd = ret; filp = ib_uverbs_alloc_event_file(file, 0); if (IS_ERR(filp)) { put_unused_fd(resp.fd); 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 *obj; 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; obj = kmalloc(sizeof *obj, GFP_KERNEL); if (!obj) return -ENOMEM; init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_class); down_write(&obj->uobject.mutex); if (cmd.comp_channel >= 0) { ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel); if (!ev_file) { ret = -EINVAL; goto err; } } obj->uverbs_file = file; obj->comp_events_reported = 0; obj->async_events_reported = 0; INIT_LIST_HEAD(&obj->comp_list); INIT_LIST_HEAD(&obj->async_list); cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe, cmd.comp_vector, file->ucontext, &udata); if (IS_ERR(cq)) { ret = PTR_ERR(cq); goto err_file; } cq->device = file->device->ib_dev; cq->uobject = &obj->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); obj->uobject.object = cq; ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject); if (ret) goto err_free; memset(&resp, 0, sizeof resp); resp.cq_handle = obj->uobject.id; resp.cqe = cq->cqe; if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) { ret = -EFAULT; goto err_copy; } mutex_lock(&file->mutex); list_add_tail(&obj->uobject.list, &file->ucontext->cq_list); mutex_unlock(&file->mutex); obj->uobject.live = 1; up_write(&obj->uobject.mutex); return in_len; err_copy: idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject); err_free: ib_destroy_cq(cq); err_file: if (ev_file) ib_uverbs_release_ucq(file, ev_file, obj); err: put_uobj_write(&obj->uobject); return ret; } ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_resize_cq cmd; struct ib_uverbs_resize_cq_resp resp; struct ib_udata udata; struct ib_cq *cq; int ret = -EINVAL; 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); cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); if (!cq) return -EINVAL; ret = cq->device->resize_cq(cq, cmd.cqe, &udata); if (ret) goto out; resp.cqe = cq->cqe; if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp.cqe)) ret = -EFAULT; out: put_cq_read(cq); return ret ? ret : in_len; } static int copy_wc_to_user(void __user *dest, struct ib_wc *wc) { struct ib_uverbs_wc tmp; tmp.wr_id = wc->wr_id; tmp.status = wc->status; tmp.opcode = wc->opcode; tmp.vendor_err = wc->vendor_err; tmp.byte_len = wc->byte_len; tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data; tmp.qp_num = wc->qp->qp_num; tmp.src_qp = wc->src_qp; tmp.wc_flags = wc->wc_flags; tmp.pkey_index = wc->pkey_index; tmp.slid = wc->slid; tmp.sl = wc->sl; tmp.dlid_path_bits = wc->dlid_path_bits; tmp.port_num = wc->port_num; tmp.reserved = 0; if (copy_to_user(dest, &tmp, sizeof tmp)) return -EFAULT; return 0; } 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; u8 __user *header_ptr; u8 __user *data_ptr; struct ib_cq *cq; struct ib_wc wc; int ret; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); if (!cq) return -EINVAL; /* we copy a struct ib_uverbs_poll_cq_resp to user space */ header_ptr = (void __user *)(unsigned long) cmd.response; data_ptr = header_ptr + sizeof resp; memset(&resp, 0, sizeof resp); while (resp.count < cmd.ne) { ret = ib_poll_cq(cq, 1, &wc); if (ret < 0) goto out_put; if (!ret) break; ret = copy_wc_to_user(data_ptr, &wc); if (ret) goto out_put; data_ptr += sizeof(struct ib_uverbs_wc); ++resp.count; } if (copy_to_user(header_ptr, &resp, sizeof resp)) { ret = -EFAULT; goto out_put; } ret = in_len; out_put: put_cq_read(cq); return ret; } 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; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); if (!cq) return -EINVAL; ib_req_notify_cq(cq, cmd.solicited_only ? IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); put_cq_read(cq); return in_len; } 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_uobject *uobj; struct ib_cq *cq; struct ib_ucq_object *obj; struct ib_uverbs_event_file *ev_file; int ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext); if (!uobj) return -EINVAL; cq = uobj->object; ev_file = cq->cq_context; obj = container_of(cq->uobject, struct ib_ucq_object, uobject); ret = ib_destroy_cq(cq); if (!ret) uobj->live = 0; put_uobj_write(uobj); if (ret) return ret; idr_remove_uobj(&ib_uverbs_cq_idr, uobj); mutex_lock(&file->mutex); list_del(&uobj->list); mutex_unlock(&file->mutex); ib_uverbs_release_ucq(file, ev_file, obj); memset(&resp, 0, sizeof resp); resp.comp_events_reported = obj->comp_events_reported; resp.async_events_reported = obj->async_events_reported; put_uobj(uobj); if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) return -EFAULT; return 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 *obj; struct ib_device *device; struct ib_pd *pd = NULL; struct ib_xrcd *xrcd = NULL; struct ib_uobject *uninitialized_var(xrcd_uobj); struct ib_cq *scq = NULL, *rcq = NULL; struct ib_srq *srq = NULL; 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; if (cmd.qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW)) return -EPERM; INIT_UDATA(&udata, buf + sizeof cmd, (unsigned long) cmd.response + sizeof resp, in_len - sizeof cmd, out_len - sizeof resp); obj = kzalloc(sizeof *obj, GFP_KERNEL); if (!obj) return -ENOMEM; init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class); down_write(&obj->uevent.uobject.mutex); if (cmd.qp_type == IB_QPT_XRC_TGT) { xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj); if (!xrcd) { ret = -EINVAL; goto err_put; } device = xrcd->device; } else { if (cmd.qp_type == IB_QPT_XRC_INI) { cmd.max_recv_wr = cmd.max_recv_sge = 0; } else { if (cmd.is_srq) { srq = idr_read_srq(cmd.srq_handle, file->ucontext); if (!srq || srq->srq_type != IB_SRQT_BASIC) { ret = -EINVAL; goto err_put; } } if (cmd.recv_cq_handle != cmd.send_cq_handle) { rcq = idr_read_cq(cmd.recv_cq_handle, file->ucontext, 0); if (!rcq) { ret = -EINVAL; goto err_put; } } } scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, !!rcq); rcq = rcq ?: scq; pd = idr_read_pd(cmd.pd_handle, file->ucontext); if (!pd || !scq) { ret = -EINVAL; goto err_put; } device = pd->device; } attr.event_handler = ib_uverbs_qp_event_handler; attr.qp_context = file; attr.send_cq = scq; attr.recv_cq = rcq; attr.srq = srq; attr.xrcd = xrcd; attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR; attr.qp_type = cmd.qp_type; attr.create_flags = 0; 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; obj->uevent.events_reported = 0; INIT_LIST_HEAD(&obj->uevent.event_list); INIT_LIST_HEAD(&obj->mcast_list); if (cmd.qp_type == IB_QPT_XRC_TGT) qp = ib_create_qp(pd, &attr); else qp = device->create_qp(pd, &attr, &udata); if (IS_ERR(qp)) { ret = PTR_ERR(qp); goto err_put; } if (cmd.qp_type != IB_QPT_XRC_TGT) { qp->real_qp = qp; qp->device = device; qp->pd = pd; qp->send_cq = attr.send_cq; qp->recv_cq = attr.recv_cq; qp->srq = attr.srq; qp->event_handler = attr.event_handler; qp->qp_context = attr.qp_context; qp->qp_type = attr.qp_type; atomic_set(&qp->usecnt, 0); atomic_inc(&pd->usecnt); atomic_inc(&attr.send_cq->usecnt); if (attr.recv_cq) atomic_inc(&attr.recv_cq->usecnt); if (attr.srq) atomic_inc(&attr.srq->usecnt); } qp->uobject = &obj->uevent.uobject; obj->uevent.uobject.object = qp; ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); if (ret) goto err_destroy; memset(&resp, 0, sizeof resp); resp.qpn = qp->qp_num; resp.qp_handle = obj->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_copy; } if (xrcd) { obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); atomic_inc(&obj->uxrcd->refcnt); put_xrcd_read(xrcd_uobj); } if (pd) put_pd_read(pd); if (scq) put_cq_read(scq); if (rcq && rcq != scq) put_cq_read(rcq); if (srq) put_srq_read(srq); mutex_lock(&file->mutex); list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list); mutex_unlock(&file->mutex); obj->uevent.uobject.live = 1; up_write(&obj->uevent.uobject.mutex); return in_len; err_copy: idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); err_destroy: ib_destroy_qp(qp); err_put: if (xrcd) put_xrcd_read(xrcd_uobj); if (pd) put_pd_read(pd); if (scq) put_cq_read(scq); if (rcq && rcq != scq) put_cq_read(rcq); if (srq) put_srq_read(srq); put_uobj_write(&obj->uevent.uobject); return ret; } ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_open_qp cmd; struct ib_uverbs_create_qp_resp resp; struct ib_udata udata; struct ib_uqp_object *obj; struct ib_xrcd *xrcd; struct ib_uobject *uninitialized_var(xrcd_uobj); struct ib_qp *qp; struct ib_qp_open_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); obj = kmalloc(sizeof *obj, GFP_KERNEL); if (!obj) return -ENOMEM; init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class); down_write(&obj->uevent.uobject.mutex); xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj); if (!xrcd) { ret = -EINVAL; goto err_put; } attr.event_handler = ib_uverbs_qp_event_handler; attr.qp_context = file; attr.qp_num = cmd.qpn; attr.qp_type = cmd.qp_type; obj->uevent.events_reported = 0; INIT_LIST_HEAD(&obj->uevent.event_list); INIT_LIST_HEAD(&obj->mcast_list); qp = ib_open_qp(xrcd, &attr); if (IS_ERR(qp)) { ret = PTR_ERR(qp); goto err_put; } qp->uobject = &obj->uevent.uobject; obj->uevent.uobject.object = qp; ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); if (ret) goto err_destroy; memset(&resp, 0, sizeof resp); resp.qpn = qp->qp_num; resp.qp_handle = obj->uevent.uobject.id; if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) { ret = -EFAULT; goto err_remove; } obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); atomic_inc(&obj->uxrcd->refcnt); put_xrcd_read(xrcd_uobj); mutex_lock(&file->mutex); list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list); mutex_unlock(&file->mutex); obj->uevent.uobject.live = 1; up_write(&obj->uevent.uobject.mutex); return in_len; err_remove: idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject); err_destroy: ib_destroy_qp(qp); err_put: put_xrcd_read(xrcd_uobj); put_uobj_write(&obj->uevent.uobject); return ret; } ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_query_qp cmd; struct ib_uverbs_query_qp_resp resp; struct ib_qp *qp; struct ib_qp_attr *attr; struct ib_qp_init_attr *init_attr; int ret; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; attr = kmalloc(sizeof *attr, GFP_KERNEL); init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL); if (!attr || !init_attr) { ret = -ENOMEM; goto out; } qp = idr_read_qp(cmd.qp_handle, file->ucontext); if (!qp) { ret = -EINVAL; goto out; } ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); put_qp_read(qp); if (ret) goto out; memset(&resp, 0, sizeof resp); resp.qp_state = attr->qp_state; resp.cur_qp_state = attr->cur_qp_state; resp.path_mtu = attr->path_mtu; resp.path_mig_state = attr->path_mig_state; resp.qkey = attr->qkey; resp.rq_psn = attr->rq_psn; resp.sq_psn = attr->sq_psn; resp.dest_qp_num = attr->dest_qp_num; resp.qp_access_flags = attr->qp_access_flags; resp.pkey_index = attr->pkey_index; resp.alt_pkey_index = attr->alt_pkey_index; resp.sq_draining = attr->sq_draining; resp.max_rd_atomic = attr->max_rd_atomic; resp.max_dest_rd_atomic = attr->max_dest_rd_atomic; resp.min_rnr_timer = attr->min_rnr_timer; resp.port_num = attr->port_num; resp.timeout = attr->timeout; resp.retry_cnt = attr->retry_cnt; resp.rnr_retry = attr->rnr_retry; resp.alt_port_num = attr->alt_port_num; resp.alt_timeout = attr->alt_timeout; memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16); resp.dest.flow_label = attr->ah_attr.grh.flow_label; resp.dest.sgid_index = attr->ah_attr.grh.sgid_index; resp.dest.hop_limit = attr->ah_attr.grh.hop_limit; resp.dest.traffic_class = attr->ah_attr.grh.traffic_class; resp.dest.dlid = attr->ah_attr.dlid; resp.dest.sl = attr->ah_attr.sl; resp.dest.src_path_bits = attr->ah_attr.src_path_bits; resp.dest.static_rate = attr->ah_attr.static_rate; resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH); resp.dest.port_num = attr->ah_attr.port_num; memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16); resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label; resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index; resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit; resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class; resp.alt_dest.dlid = attr->alt_ah_attr.dlid; resp.alt_dest.sl = attr->alt_ah_attr.sl; resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits; resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate; resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH); resp.alt_dest.port_num = attr->alt_ah_attr.port_num; resp.max_send_wr = init_attr->cap.max_send_wr; resp.max_recv_wr = init_attr->cap.max_recv_wr; resp.max_send_sge = init_attr->cap.max_send_sge; resp.max_recv_sge = init_attr->cap.max_recv_sge; resp.max_inline_data = init_attr->cap.max_inline_data; resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR; if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) ret = -EFAULT; out: kfree(attr); kfree(init_attr); return ret ? ret : in_len; } /* Remove ignored fields set in the attribute mask */ static int modify_qp_mask(enum ib_qp_type qp_type, int mask) { switch (qp_type) { case IB_QPT_XRC_INI: return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER); case IB_QPT_XRC_TGT: return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT | IB_QP_RNR_RETRY); default: return mask; } } 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_udata udata; struct ib_qp *qp; struct ib_qp_attr *attr; int ret; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd, out_len); attr = kmalloc(sizeof *attr, GFP_KERNEL); if (!attr) return -ENOMEM; qp = idr_read_qp(cmd.qp_handle, file->ucontext); if (!qp) { 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.alt_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; if (qp->real_qp == qp) { ret = ib_resolve_eth_l2_attrs(qp, attr, &cmd.attr_mask); if (ret) goto release_qp; ret = qp->device->modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata); } else { ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask)); } if (ret) goto release_qp; ret = in_len; release_qp: put_qp_read(qp); out: 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_uobject *uobj; struct ib_qp *qp; struct ib_uqp_object *obj; int ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; memset(&resp, 0, sizeof resp); uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext); if (!uobj) return -EINVAL; qp = uobj->object; obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); if (!list_empty(&obj->mcast_list)) { put_uobj_write(uobj); return -EBUSY; } ret = ib_destroy_qp(qp); if (!ret) uobj->live = 0; put_uobj_write(uobj); if (ret) return ret; if (obj->uxrcd) atomic_dec(&obj->uxrcd->refcnt); idr_remove_uobj(&ib_uverbs_qp_idr, uobj); mutex_lock(&file->mutex); list_del(&uobj->list); mutex_unlock(&file->mutex); ib_uverbs_release_uevent(file, &obj->uevent); resp.events_reported = obj->uevent.events_reported; put_uobj(uobj); if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) return -EFAULT; return 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; int is_ud; 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; qp = idr_read_qp(cmd.qp_handle, file->ucontext); if (!qp) goto out; is_ud = qp->qp_type == IB_QPT_UD; 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_put; } if (user_wr->num_sge + sg_ind > cmd.sge_count) { ret = -EINVAL; goto out_put; } 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_put; } 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; if (is_ud) { next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah, file->ucontext); if (!next->wr.ud.ah) { ret = -EINVAL; goto out_put; } next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn; next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey; if (next->opcode == IB_WR_SEND_WITH_IMM) next->ex.imm_data = (__be32 __force) user_wr->ex.imm_data; } else { switch (next->opcode) { case IB_WR_RDMA_WRITE_WITH_IMM: next->ex.imm_data = (__be32 __force) user_wr->ex.imm_data; case IB_WR_RDMA_WRITE: 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_SEND_WITH_IMM: next->ex.imm_data = (__be32 __force) user_wr->ex.imm_data; break; case IB_WR_SEND_WITH_INV: next->ex.invalidate_rkey = user_wr->ex.invalidate_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_put; } sg_ind += next->num_sge; } else next->sg_list = NULL; } resp.bad_wr = 0; ret = qp->device->post_send(qp->real_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_put: put_qp_read(qp); while (wr) { if (is_ud && wr->wr.ud.ah) put_ah_read(wr->wr.ud.ah); next = wr->next; kfree(wr); wr = next; } out: 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); qp = idr_read_qp(cmd.qp_handle, file->ucontext); if (!qp) goto out; resp.bad_wr = 0; ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr); put_qp_read(qp); 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: 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); srq = idr_read_srq(cmd.srq_handle, file->ucontext); if (!srq) goto out; resp.bad_wr = 0; ret = srq->device->post_srq_recv(srq, wr, &bad_wr); put_srq_read(srq); 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: 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; init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class); down_write(&uobj->mutex); pd = idr_read_pd(cmd.pd_handle, file->ucontext); if (!pd) { ret = -EINVAL; goto err; } 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.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0; 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; attr.vlan_id = 0; memset(&attr.dmac, 0, sizeof(attr.dmac)); 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_put; } ah->uobject = uobj; uobj->object = ah; ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj); 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_copy; } put_pd_read(pd); mutex_lock(&file->mutex); list_add_tail(&uobj->list, &file->ucontext->ah_list); mutex_unlock(&file->mutex); uobj->live = 1; up_write(&uobj->mutex); return in_len; err_copy: idr_remove_uobj(&ib_uverbs_ah_idr, uobj); err_destroy: ib_destroy_ah(ah); err_put: put_pd_read(pd); err: put_uobj_write(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; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext); if (!uobj) return -EINVAL; ah = uobj->object; ret = ib_destroy_ah(ah); if (!ret) uobj->live = 0; put_uobj_write(uobj); if (ret) return ret; idr_remove_uobj(&ib_uverbs_ah_idr, uobj); mutex_lock(&file->mutex); list_del(&uobj->list); mutex_unlock(&file->mutex); put_uobj(uobj); return 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 *obj; struct ib_uverbs_mcast_entry *mcast; int ret; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; qp = idr_write_qp(cmd.qp_handle, file->ucontext); if (!qp) return -EINVAL; obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); list_for_each_entry(mcast, &obj->mcast_list, list) if (cmd.mlid == mcast->lid && !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { ret = 0; goto out_put; } mcast = kmalloc(sizeof *mcast, GFP_KERNEL); if (!mcast) { ret = -ENOMEM; goto out_put; } 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) list_add_tail(&mcast->list, &obj->mcast_list); else kfree(mcast); out_put: put_qp_write(qp); 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 *obj; struct ib_qp *qp; struct ib_uverbs_mcast_entry *mcast; int ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; qp = idr_write_qp(cmd.qp_handle, file->ucontext); if (!qp) return -EINVAL; ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid); if (ret) goto out_put; obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); list_for_each_entry(mcast, &obj->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_put: put_qp_write(qp); return ret ? ret : in_len; } static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec, union ib_flow_spec *ib_spec) { if (kern_spec->reserved) return -EINVAL; ib_spec->type = kern_spec->type; switch (ib_spec->type) { case IB_FLOW_SPEC_ETH: ib_spec->eth.size = sizeof(struct ib_flow_spec_eth); if (ib_spec->eth.size != kern_spec->eth.size) return -EINVAL; memcpy(&ib_spec->eth.val, &kern_spec->eth.val, sizeof(struct ib_flow_eth_filter)); memcpy(&ib_spec->eth.mask, &kern_spec->eth.mask, sizeof(struct ib_flow_eth_filter)); break; case IB_FLOW_SPEC_IPV4: ib_spec->ipv4.size = sizeof(struct ib_flow_spec_ipv4); if (ib_spec->ipv4.size != kern_spec->ipv4.size) return -EINVAL; memcpy(&ib_spec->ipv4.val, &kern_spec->ipv4.val, sizeof(struct ib_flow_ipv4_filter)); memcpy(&ib_spec->ipv4.mask, &kern_spec->ipv4.mask, sizeof(struct ib_flow_ipv4_filter)); break; case IB_FLOW_SPEC_TCP: case IB_FLOW_SPEC_UDP: ib_spec->tcp_udp.size = sizeof(struct ib_flow_spec_tcp_udp); if (ib_spec->tcp_udp.size != kern_spec->tcp_udp.size) return -EINVAL; memcpy(&ib_spec->tcp_udp.val, &kern_spec->tcp_udp.val, sizeof(struct ib_flow_tcp_udp_filter)); memcpy(&ib_spec->tcp_udp.mask, &kern_spec->tcp_udp.mask, sizeof(struct ib_flow_tcp_udp_filter)); break; default: return -EINVAL; } return 0; } int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file, struct ib_udata *ucore, struct ib_udata *uhw) { struct ib_uverbs_create_flow cmd; struct ib_uverbs_create_flow_resp resp; struct ib_uobject *uobj; struct ib_flow *flow_id; struct ib_uverbs_flow_attr *kern_flow_attr; struct ib_flow_attr *flow_attr; struct ib_qp *qp; int err = 0; void *kern_spec; void *ib_spec; int i; if (ucore->inlen < sizeof(cmd)) return -EINVAL; if (ucore->outlen < sizeof(resp)) return -ENOSPC; err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd)); if (err) return err; ucore->inbuf += sizeof(cmd); ucore->inlen -= sizeof(cmd); if (cmd.comp_mask) return -EINVAL; if ((cmd.flow_attr.type == IB_FLOW_ATTR_SNIFFER && !capable(CAP_NET_ADMIN)) || !capable(CAP_NET_RAW)) return -EPERM; if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS) return -EINVAL; if (cmd.flow_attr.size > ucore->inlen || cmd.flow_attr.size > (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec))) return -EINVAL; if (cmd.flow_attr.reserved[0] || cmd.flow_attr.reserved[1]) return -EINVAL; if (cmd.flow_attr.num_of_specs) { kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size, GFP_KERNEL); if (!kern_flow_attr) return -ENOMEM; memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr)); err = ib_copy_from_udata(kern_flow_attr + 1, ucore, cmd.flow_attr.size); if (err) goto err_free_attr; } else { kern_flow_attr = &cmd.flow_attr; } uobj = kmalloc(sizeof(*uobj), GFP_KERNEL); if (!uobj) { err = -ENOMEM; goto err_free_attr; } init_uobj(uobj, 0, file->ucontext, &rule_lock_class); down_write(&uobj->mutex); qp = idr_read_qp(cmd.qp_handle, file->ucontext); if (!qp) { err = -EINVAL; goto err_uobj; } flow_attr = kmalloc(sizeof(*flow_attr) + cmd.flow_attr.size, GFP_KERNEL); if (!flow_attr) { err = -ENOMEM; goto err_put; } flow_attr->type = kern_flow_attr->type; flow_attr->priority = kern_flow_attr->priority; flow_attr->num_of_specs = kern_flow_attr->num_of_specs; flow_attr->port = kern_flow_attr->port; flow_attr->flags = kern_flow_attr->flags; flow_attr->size = sizeof(*flow_attr); kern_spec = kern_flow_attr + 1; ib_spec = flow_attr + 1; for (i = 0; i < flow_attr->num_of_specs && cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) && cmd.flow_attr.size >= ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) { err = kern_spec_to_ib_spec(kern_spec, ib_spec); if (err) goto err_free; flow_attr->size += ((union ib_flow_spec *) ib_spec)->size; cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size; kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size; ib_spec += ((union ib_flow_spec *) ib_spec)->size; } if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) { pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n", i, cmd.flow_attr.size); err = -EINVAL; goto err_free; } flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER); if (IS_ERR(flow_id)) { err = PTR_ERR(flow_id); goto err_free; } flow_id->qp = qp; flow_id->uobject = uobj; uobj->object = flow_id; err = idr_add_uobj(&ib_uverbs_rule_idr, uobj); if (err) goto destroy_flow; memset(&resp, 0, sizeof(resp)); resp.flow_handle = uobj->id; err = ib_copy_to_udata(ucore, &resp, sizeof(resp)); if (err) goto err_copy; put_qp_read(qp); mutex_lock(&file->mutex); list_add_tail(&uobj->list, &file->ucontext->rule_list); mutex_unlock(&file->mutex); uobj->live = 1; up_write(&uobj->mutex); kfree(flow_attr); if (cmd.flow_attr.num_of_specs) kfree(kern_flow_attr); return 0; err_copy: idr_remove_uobj(&ib_uverbs_rule_idr, uobj); destroy_flow: ib_destroy_flow(flow_id); err_free: kfree(flow_attr); err_put: put_qp_read(qp); err_uobj: put_uobj_write(uobj); err_free_attr: if (cmd.flow_attr.num_of_specs) kfree(kern_flow_attr); return err; } int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file, struct ib_udata *ucore, struct ib_udata *uhw) { struct ib_uverbs_destroy_flow cmd; struct ib_flow *flow_id; struct ib_uobject *uobj; int ret; if (ucore->inlen < sizeof(cmd)) return -EINVAL; ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd)); if (ret) return ret; if (cmd.comp_mask) return -EINVAL; uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle, file->ucontext); if (!uobj) return -EINVAL; flow_id = uobj->object; ret = ib_destroy_flow(flow_id); if (!ret) uobj->live = 0; put_uobj_write(uobj); idr_remove_uobj(&ib_uverbs_rule_idr, uobj); mutex_lock(&file->mutex); list_del(&uobj->list); mutex_unlock(&file->mutex); put_uobj(uobj); return ret; } static int __uverbs_create_xsrq(struct ib_uverbs_file *file, struct ib_uverbs_create_xsrq *cmd, struct ib_udata *udata) { struct ib_uverbs_create_srq_resp resp; struct ib_usrq_object *obj; struct ib_pd *pd; struct ib_srq *srq; struct ib_uobject *uninitialized_var(xrcd_uobj); struct ib_srq_init_attr attr; int ret; obj = kmalloc(sizeof *obj, GFP_KERNEL); if (!obj) return -ENOMEM; init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class); down_write(&obj->uevent.uobject.mutex); if (cmd->srq_type == IB_SRQT_XRC) { attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj); if (!attr.ext.xrc.xrcd) { ret = -EINVAL; goto err; } obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); atomic_inc(&obj->uxrcd->refcnt); attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0); if (!attr.ext.xrc.cq) { ret = -EINVAL; goto err_put_xrcd; } } pd = idr_read_pd(cmd->pd_handle, file->ucontext); if (!pd) { ret = -EINVAL; goto err_put_cq; } attr.event_handler = ib_uverbs_srq_event_handler; attr.srq_context = file; attr.srq_type = cmd->srq_type; attr.attr.max_wr = cmd->max_wr; attr.attr.max_sge = cmd->max_sge; attr.attr.srq_limit = cmd->srq_limit; obj->uevent.events_reported = 0; INIT_LIST_HEAD(&obj->uevent.event_list); srq = pd->device->create_srq(pd, &attr, udata); if (IS_ERR(srq)) { ret = PTR_ERR(srq); goto err_put; } srq->device = pd->device; srq->pd = pd; srq->srq_type = cmd->srq_type; srq->uobject = &obj->uevent.uobject; srq->event_handler = attr.event_handler; srq->srq_context = attr.srq_context; if (cmd->srq_type == IB_SRQT_XRC) { srq->ext.xrc.cq = attr.ext.xrc.cq; srq->ext.xrc.xrcd = attr.ext.xrc.xrcd; atomic_inc(&attr.ext.xrc.cq->usecnt); atomic_inc(&attr.ext.xrc.xrcd->usecnt); } atomic_inc(&pd->usecnt); atomic_set(&srq->usecnt, 0); obj->uevent.uobject.object = srq; ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject); if (ret) goto err_destroy; memset(&resp, 0, sizeof resp); resp.srq_handle = obj->uevent.uobject.id; resp.max_wr = attr.attr.max_wr; resp.max_sge = attr.attr.max_sge; if (cmd->srq_type == IB_SRQT_XRC) resp.srqn = srq->ext.xrc.srq_num; if (copy_to_user((void __user *) (unsigned long) cmd->response, &resp, sizeof resp)) { ret = -EFAULT; goto err_copy; } if (cmd->srq_type == IB_SRQT_XRC) { put_uobj_read(xrcd_uobj); put_cq_read(attr.ext.xrc.cq); } put_pd_read(pd); mutex_lock(&file->mutex); list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list); mutex_unlock(&file->mutex); obj->uevent.uobject.live = 1; up_write(&obj->uevent.uobject.mutex); return 0; err_copy: idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject); err_destroy: ib_destroy_srq(srq); err_put: put_pd_read(pd); err_put_cq: if (cmd->srq_type == IB_SRQT_XRC) put_cq_read(attr.ext.xrc.cq); err_put_xrcd: if (cmd->srq_type == IB_SRQT_XRC) { atomic_dec(&obj->uxrcd->refcnt); put_uobj_read(xrcd_uobj); } err: put_uobj_write(&obj->uevent.uobject); return ret; } 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_xsrq xcmd; struct ib_uverbs_create_srq_resp resp; struct ib_udata udata; int ret; if (out_len < sizeof resp) return -ENOSPC; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; xcmd.response = cmd.response; xcmd.user_handle = cmd.user_handle; xcmd.srq_type = IB_SRQT_BASIC; xcmd.pd_handle = cmd.pd_handle; xcmd.max_wr = cmd.max_wr; xcmd.max_sge = cmd.max_sge; xcmd.srq_limit = cmd.srq_limit; INIT_UDATA(&udata, buf + sizeof cmd, (unsigned long) cmd.response + sizeof resp, in_len - sizeof cmd, out_len - sizeof resp); ret = __uverbs_create_xsrq(file, &xcmd, &udata); if (ret) return ret; return in_len; } ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_create_xsrq cmd; struct ib_uverbs_create_srq_resp resp; struct ib_udata udata; 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); ret = __uverbs_create_xsrq(file, &cmd, &udata); if (ret) return ret; return in_len; } 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_udata udata; struct ib_srq *srq; struct ib_srq_attr attr; int ret; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd, out_len); srq = idr_read_srq(cmd.srq_handle, file->ucontext); if (!srq) return -EINVAL; attr.max_wr = cmd.max_wr; attr.srq_limit = cmd.srq_limit; ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata); put_srq_read(srq); return ret ? ret : in_len; } ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_query_srq cmd; struct ib_uverbs_query_srq_resp resp; struct ib_srq_attr attr; struct ib_srq *srq; int ret; if (out_len < sizeof resp) return -ENOSPC; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; srq = idr_read_srq(cmd.srq_handle, file->ucontext); if (!srq) return -EINVAL; ret = ib_query_srq(srq, &attr); put_srq_read(srq); if (ret) return ret; memset(&resp, 0, sizeof resp); resp.max_wr = attr.max_wr; resp.max_sge = attr.max_sge; resp.srq_limit = attr.srq_limit; if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) return -EFAULT; return 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_uobject *uobj; struct ib_srq *srq; struct ib_uevent_object *obj; int ret = -EINVAL; struct ib_usrq_object *us; enum ib_srq_type srq_type; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext); if (!uobj) return -EINVAL; srq = uobj->object; obj = container_of(uobj, struct ib_uevent_object, uobject); srq_type = srq->srq_type; ret = ib_destroy_srq(srq); if (!ret) uobj->live = 0; put_uobj_write(uobj); if (ret) return ret; if (srq_type == IB_SRQT_XRC) { us = container_of(obj, struct ib_usrq_object, uevent); atomic_dec(&us->uxrcd->refcnt); } idr_remove_uobj(&ib_uverbs_srq_idr, uobj); mutex_lock(&file->mutex); list_del(&uobj->list); mutex_unlock(&file->mutex); ib_uverbs_release_uevent(file, obj); memset(&resp, 0, sizeof resp); resp.events_reported = obj->events_reported; put_uobj(uobj); if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) ret = -EFAULT; return ret ? ret : in_len; } int ib_uverbs_ex_query_device(struct ib_uverbs_file *file, struct ib_udata *ucore, struct ib_udata *uhw) { struct ib_uverbs_ex_query_device_resp resp; struct ib_uverbs_ex_query_device cmd; struct ib_device_attr attr; struct ib_device *device; int err; device = file->device->ib_dev; if (ucore->inlen < sizeof(cmd)) return -EINVAL; err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd)); if (err) return err; if (cmd.comp_mask) return -EINVAL; if (cmd.reserved) return -EINVAL; resp.response_length = offsetof(typeof(resp), odp_caps); if (ucore->outlen < resp.response_length) return -ENOSPC; err = device->query_device(device, &attr); if (err) return err; copy_query_dev_fields(file, &resp.base, &attr); resp.comp_mask = 0; if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps)) goto end; #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING resp.odp_caps.general_caps = attr.odp_caps.general_caps; resp.odp_caps.per_transport_caps.rc_odp_caps = attr.odp_caps.per_transport_caps.rc_odp_caps; resp.odp_caps.per_transport_caps.uc_odp_caps = attr.odp_caps.per_transport_caps.uc_odp_caps; resp.odp_caps.per_transport_caps.ud_odp_caps = attr.odp_caps.per_transport_caps.ud_odp_caps; resp.odp_caps.reserved = 0; #else memset(&resp.odp_caps, 0, sizeof(resp.odp_caps)); #endif resp.response_length += sizeof(resp.odp_caps); end: err = ib_copy_to_udata(ucore, &resp, resp.response_length); if (err) return err; return 0; }