diff options
Diffstat (limited to '')
-rw-r--r-- | drivers/infiniband/core/uverbs_cmd.c | 4052 |
1 files changed, 4052 insertions, 0 deletions
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c new file mode 100644 index 000000000..e836c9c47 --- /dev/null +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -0,0 +1,4052 @@ +/* + * 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 <linux/file.h> +#include <linux/fs.h> +#include <linux/slab.h> +#include <linux/sched.h> + +#include <linux/uaccess.h> + +#include <rdma/uverbs_types.h> +#include <rdma/uverbs_std_types.h> +#include "rdma_core.h" + +#include "uverbs.h" +#include "core_priv.h" + +/* + * Copy a response to userspace. If the provided 'resp' is larger than the + * user buffer it is silently truncated. If the user provided a larger buffer + * then the trailing portion is zero filled. + * + * These semantics are intended to support future extension of the output + * structures. + */ +static int uverbs_response(struct uverbs_attr_bundle *attrs, const void *resp, + size_t resp_len) +{ + int ret; + + if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) + return uverbs_copy_to_struct_or_zero( + attrs, UVERBS_ATTR_CORE_OUT, resp, resp_len); + + if (copy_to_user(attrs->ucore.outbuf, resp, + min(attrs->ucore.outlen, resp_len))) + return -EFAULT; + + if (resp_len < attrs->ucore.outlen) { + /* + * Zero fill any extra memory that user + * space might have provided. + */ + ret = clear_user(attrs->ucore.outbuf + resp_len, + attrs->ucore.outlen - resp_len); + if (ret) + return -EFAULT; + } + + return 0; +} + +/* + * Copy a request from userspace. If the provided 'req' is larger than the + * user buffer then the user buffer is zero extended into the 'req'. If 'req' + * is smaller than the user buffer then the uncopied bytes in the user buffer + * must be zero. + */ +static int uverbs_request(struct uverbs_attr_bundle *attrs, void *req, + size_t req_len) +{ + if (copy_from_user(req, attrs->ucore.inbuf, + min(attrs->ucore.inlen, req_len))) + return -EFAULT; + + if (attrs->ucore.inlen < req_len) { + memset(req + attrs->ucore.inlen, 0, + req_len - attrs->ucore.inlen); + } else if (attrs->ucore.inlen > req_len) { + if (!ib_is_buffer_cleared(attrs->ucore.inbuf + req_len, + attrs->ucore.inlen - req_len)) + return -EOPNOTSUPP; + } + return 0; +} + +/* + * Generate the value for the 'response_length' protocol used by write_ex. + * This is the number of bytes the kernel actually wrote. Userspace can use + * this to detect what structure members in the response the kernel + * understood. + */ +static u32 uverbs_response_length(struct uverbs_attr_bundle *attrs, + size_t resp_len) +{ + return min_t(size_t, attrs->ucore.outlen, resp_len); +} + +/* + * The iterator version of the request interface is for handlers that need to + * step over a flex array at the end of a command header. + */ +struct uverbs_req_iter { + const void __user *cur; + const void __user *end; +}; + +static int uverbs_request_start(struct uverbs_attr_bundle *attrs, + struct uverbs_req_iter *iter, + void *req, + size_t req_len) +{ + if (attrs->ucore.inlen < req_len) + return -ENOSPC; + + if (copy_from_user(req, attrs->ucore.inbuf, req_len)) + return -EFAULT; + + iter->cur = attrs->ucore.inbuf + req_len; + iter->end = attrs->ucore.inbuf + attrs->ucore.inlen; + return 0; +} + +static int uverbs_request_next(struct uverbs_req_iter *iter, void *val, + size_t len) +{ + if (iter->cur + len > iter->end) + return -ENOSPC; + + if (copy_from_user(val, iter->cur, len)) + return -EFAULT; + + iter->cur += len; + return 0; +} + +static const void __user *uverbs_request_next_ptr(struct uverbs_req_iter *iter, + size_t len) +{ + const void __user *res = iter->cur; + + if (iter->cur + len > iter->end) + return (void __force __user *)ERR_PTR(-ENOSPC); + iter->cur += len; + return res; +} + +static int uverbs_request_finish(struct uverbs_req_iter *iter) +{ + if (!ib_is_buffer_cleared(iter->cur, iter->end - iter->cur)) + return -EOPNOTSUPP; + return 0; +} + +/* + * When calling a destroy function during an error unwind we need to pass in + * the udata that is sanitized of all user arguments. Ie from the driver + * perspective it looks like no udata was passed. + */ +struct ib_udata *uverbs_get_cleared_udata(struct uverbs_attr_bundle *attrs) +{ + attrs->driver_udata = (struct ib_udata){}; + return &attrs->driver_udata; +} + +static struct ib_uverbs_completion_event_file * +_ib_uverbs_lookup_comp_file(s32 fd, struct uverbs_attr_bundle *attrs) +{ + struct ib_uobject *uobj = ufd_get_read(UVERBS_OBJECT_COMP_CHANNEL, + fd, attrs); + + if (IS_ERR(uobj)) + return (void *)uobj; + + uverbs_uobject_get(uobj); + uobj_put_read(uobj); + + return container_of(uobj, struct ib_uverbs_completion_event_file, + uobj); +} +#define ib_uverbs_lookup_comp_file(_fd, _ufile) \ + _ib_uverbs_lookup_comp_file((_fd)*typecheck(s32, _fd), _ufile) + +int ib_alloc_ucontext(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_file *ufile = attrs->ufile; + struct ib_ucontext *ucontext; + struct ib_device *ib_dev; + + ib_dev = srcu_dereference(ufile->device->ib_dev, + &ufile->device->disassociate_srcu); + if (!ib_dev) + return -EIO; + + ucontext = rdma_zalloc_drv_obj(ib_dev, ib_ucontext); + if (!ucontext) + return -ENOMEM; + + ucontext->device = ib_dev; + ucontext->ufile = ufile; + xa_init_flags(&ucontext->mmap_xa, XA_FLAGS_ALLOC); + + rdma_restrack_new(&ucontext->res, RDMA_RESTRACK_CTX); + rdma_restrack_set_name(&ucontext->res, NULL); + attrs->context = ucontext; + return 0; +} + +int ib_init_ucontext(struct uverbs_attr_bundle *attrs) +{ + struct ib_ucontext *ucontext = attrs->context; + struct ib_uverbs_file *file = attrs->ufile; + int ret; + + if (!down_read_trylock(&file->hw_destroy_rwsem)) + return -EIO; + mutex_lock(&file->ucontext_lock); + if (file->ucontext) { + ret = -EINVAL; + goto err; + } + + ret = ib_rdmacg_try_charge(&ucontext->cg_obj, ucontext->device, + RDMACG_RESOURCE_HCA_HANDLE); + if (ret) + goto err; + + ret = ucontext->device->ops.alloc_ucontext(ucontext, + &attrs->driver_udata); + if (ret) + goto err_uncharge; + + rdma_restrack_add(&ucontext->res); + + /* + * Make sure that ib_uverbs_get_ucontext() sees the pointer update + * only after all writes to setup the ucontext have completed + */ + smp_store_release(&file->ucontext, ucontext); + + mutex_unlock(&file->ucontext_lock); + up_read(&file->hw_destroy_rwsem); + return 0; + +err_uncharge: + ib_rdmacg_uncharge(&ucontext->cg_obj, ucontext->device, + RDMACG_RESOURCE_HCA_HANDLE); +err: + mutex_unlock(&file->ucontext_lock); + up_read(&file->hw_destroy_rwsem); + return ret; +} + +static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_get_context_resp resp; + struct ib_uverbs_get_context cmd; + struct ib_device *ib_dev; + struct ib_uobject *uobj; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + ret = ib_alloc_ucontext(attrs); + if (ret) + return ret; + + uobj = uobj_alloc(UVERBS_OBJECT_ASYNC_EVENT, attrs, &ib_dev); + if (IS_ERR(uobj)) { + ret = PTR_ERR(uobj); + goto err_ucontext; + } + + resp = (struct ib_uverbs_get_context_resp){ + .num_comp_vectors = attrs->ufile->device->num_comp_vectors, + .async_fd = uobj->id, + }; + ret = uverbs_response(attrs, &resp, sizeof(resp)); + if (ret) + goto err_uobj; + + ret = ib_init_ucontext(attrs); + if (ret) + goto err_uobj; + + ib_uverbs_init_async_event_file( + container_of(uobj, struct ib_uverbs_async_event_file, uobj)); + rdma_alloc_commit_uobject(uobj, attrs); + return 0; + +err_uobj: + rdma_alloc_abort_uobject(uobj, attrs, false); +err_ucontext: + rdma_restrack_put(&attrs->context->res); + kfree(attrs->context); + attrs->context = NULL; + return ret; +} + +static void copy_query_dev_fields(struct ib_ucontext *ucontext, + struct ib_uverbs_query_device_resp *resp, + struct ib_device_attr *attr) +{ + struct ib_device *ib_dev = ucontext->device; + + resp->fw_ver = attr->fw_ver; + resp->node_guid = 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 = lower_32_bits(attr->device_cap_flags); + resp->max_sge = min(attr->max_send_sge, attr->max_recv_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_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 = min_t(u32, ib_dev->phys_port_cnt, U8_MAX); +} + +static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_query_device cmd; + struct ib_uverbs_query_device_resp resp; + struct ib_ucontext *ucontext; + int ret; + + ucontext = ib_uverbs_get_ucontext(attrs); + if (IS_ERR(ucontext)) + return PTR_ERR(ucontext); + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + memset(&resp, 0, sizeof resp); + copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs); + + return uverbs_response(attrs, &resp, sizeof(resp)); +} + +static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_query_port cmd; + struct ib_uverbs_query_port_resp resp; + struct ib_port_attr attr; + int ret; + struct ib_ucontext *ucontext; + struct ib_device *ib_dev; + + ucontext = ib_uverbs_get_ucontext(attrs); + if (IS_ERR(ucontext)) + return PTR_ERR(ucontext); + ib_dev = ucontext->device; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + ret = ib_query_port(ib_dev, cmd.port_num, &attr); + if (ret) + return ret; + + memset(&resp, 0, sizeof resp); + copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num); + + return uverbs_response(attrs, &resp, sizeof(resp)); +} + +static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_alloc_pd_resp resp = {}; + struct ib_uverbs_alloc_pd cmd; + struct ib_uobject *uobj; + struct ib_pd *pd; + int ret; + struct ib_device *ib_dev; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); + + pd = rdma_zalloc_drv_obj(ib_dev, ib_pd); + if (!pd) { + ret = -ENOMEM; + goto err; + } + + pd->device = ib_dev; + pd->uobject = uobj; + atomic_set(&pd->usecnt, 0); + + rdma_restrack_new(&pd->res, RDMA_RESTRACK_PD); + rdma_restrack_set_name(&pd->res, NULL); + + ret = ib_dev->ops.alloc_pd(pd, &attrs->driver_udata); + if (ret) + goto err_alloc; + rdma_restrack_add(&pd->res); + + uobj->object = pd; + uobj_finalize_uobj_create(uobj, attrs); + + resp.pd_handle = uobj->id; + return uverbs_response(attrs, &resp, sizeof(resp)); + +err_alloc: + rdma_restrack_put(&pd->res); + kfree(pd); +err: + uobj_alloc_abort(uobj, attrs); + return ret; +} + +static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_dealloc_pd cmd; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs); +} + +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); + } +} + +static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_device *ibudev = attrs->ufile->device; + struct ib_uverbs_open_xrcd_resp resp = {}; + struct ib_uverbs_open_xrcd cmd; + struct ib_uxrcd_object *obj; + struct ib_xrcd *xrcd = NULL; + struct inode *inode = NULL; + int new_xrcd = 0; + struct ib_device *ib_dev; + struct fd f = {}; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + mutex_lock(&ibudev->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(ibudev, 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 = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs, + &ib_dev); + if (IS_ERR(obj)) { + ret = PTR_ERR(obj); + goto err_tree_mutex_unlock; + } + + if (!xrcd) { + xrcd = ib_alloc_xrcd_user(ib_dev, inode, &attrs->driver_udata); + if (IS_ERR(xrcd)) { + ret = PTR_ERR(xrcd); + goto err; + } + new_xrcd = 1; + } + + atomic_set(&obj->refcnt, 0); + obj->uobject.object = xrcd; + + if (inode) { + if (new_xrcd) { + /* create new inode/xrcd table entry */ + ret = xrcd_table_insert(ibudev, inode, xrcd); + if (ret) + goto err_dealloc_xrcd; + } + atomic_inc(&xrcd->usecnt); + } + + if (f.file) + fdput(f); + + mutex_unlock(&ibudev->xrcd_tree_mutex); + uobj_finalize_uobj_create(&obj->uobject, attrs); + + resp.xrcd_handle = obj->uobject.id; + return uverbs_response(attrs, &resp, sizeof(resp)); + +err_dealloc_xrcd: + ib_dealloc_xrcd_user(xrcd, uverbs_get_cleared_udata(attrs)); + +err: + uobj_alloc_abort(&obj->uobject, attrs); + +err_tree_mutex_unlock: + if (f.file) + fdput(f); + + mutex_unlock(&ibudev->xrcd_tree_mutex); + + return ret; +} + +static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_close_xrcd cmd; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs); +} + +int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd, + enum rdma_remove_reason why, + struct uverbs_attr_bundle *attrs) +{ + struct inode *inode; + int ret; + struct ib_uverbs_device *dev = attrs->ufile->device; + + inode = xrcd->inode; + if (inode && !atomic_dec_and_test(&xrcd->usecnt)) + return 0; + + ret = ib_dealloc_xrcd_user(xrcd, &attrs->driver_udata); + if (ret) { + atomic_inc(&xrcd->usecnt); + return ret; + } + + if (inode) + xrcd_table_delete(dev, inode); + + return 0; +} + +static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_reg_mr_resp resp = {}; + struct ib_uverbs_reg_mr cmd; + struct ib_uobject *uobj; + struct ib_pd *pd; + struct ib_mr *mr; + int ret; + struct ib_device *ib_dev; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) + return -EINVAL; + + uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); + + ret = ib_check_mr_access(ib_dev, cmd.access_flags); + if (ret) + goto err_free; + + pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); + if (!pd) { + ret = -EINVAL; + goto err_free; + } + + mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va, + cmd.access_flags, + &attrs->driver_udata); + if (IS_ERR(mr)) { + ret = PTR_ERR(mr); + goto err_put; + } + + mr->device = pd->device; + mr->pd = pd; + mr->type = IB_MR_TYPE_USER; + mr->dm = NULL; + mr->sig_attrs = NULL; + mr->uobject = uobj; + atomic_inc(&pd->usecnt); + mr->iova = cmd.hca_va; + mr->length = cmd.length; + + rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR); + rdma_restrack_set_name(&mr->res, NULL); + rdma_restrack_add(&mr->res); + + uobj->object = mr; + uobj_put_obj_read(pd); + uobj_finalize_uobj_create(uobj, attrs); + + resp.lkey = mr->lkey; + resp.rkey = mr->rkey; + resp.mr_handle = uobj->id; + return uverbs_response(attrs, &resp, sizeof(resp)); + +err_put: + uobj_put_obj_read(pd); +err_free: + uobj_alloc_abort(uobj, attrs); + return ret; +} + +static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_rereg_mr cmd; + struct ib_uverbs_rereg_mr_resp resp; + struct ib_mr *mr; + int ret; + struct ib_uobject *uobj; + struct ib_uobject *new_uobj; + struct ib_device *ib_dev; + struct ib_pd *orig_pd; + struct ib_pd *new_pd; + struct ib_mr *new_mr; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + if (!cmd.flags) + return -EINVAL; + + if (cmd.flags & ~IB_MR_REREG_SUPPORTED) + return -EOPNOTSUPP; + + if ((cmd.flags & IB_MR_REREG_TRANS) && + (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) + return -EINVAL; + + uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); + + mr = uobj->object; + + if (mr->dm) { + ret = -EINVAL; + goto put_uobjs; + } + + if (cmd.flags & IB_MR_REREG_ACCESS) { + ret = ib_check_mr_access(mr->device, cmd.access_flags); + if (ret) + goto put_uobjs; + } + + orig_pd = mr->pd; + if (cmd.flags & IB_MR_REREG_PD) { + new_pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, + attrs); + if (!new_pd) { + ret = -EINVAL; + goto put_uobjs; + } + } else { + new_pd = mr->pd; + } + + /* + * The driver might create a new HW object as part of the rereg, we need + * to have a uobject ready to hold it. + */ + new_uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev); + if (IS_ERR(new_uobj)) { + ret = PTR_ERR(new_uobj); + goto put_uobj_pd; + } + + new_mr = ib_dev->ops.rereg_user_mr(mr, cmd.flags, cmd.start, cmd.length, + cmd.hca_va, cmd.access_flags, new_pd, + &attrs->driver_udata); + if (IS_ERR(new_mr)) { + ret = PTR_ERR(new_mr); + goto put_new_uobj; + } + if (new_mr) { + new_mr->device = new_pd->device; + new_mr->pd = new_pd; + new_mr->type = IB_MR_TYPE_USER; + new_mr->uobject = uobj; + atomic_inc(&new_pd->usecnt); + new_uobj->object = new_mr; + + rdma_restrack_new(&new_mr->res, RDMA_RESTRACK_MR); + rdma_restrack_set_name(&new_mr->res, NULL); + rdma_restrack_add(&new_mr->res); + + /* + * The new uobj for the new HW object is put into the same spot + * in the IDR and the old uobj & HW object is deleted. + */ + rdma_assign_uobject(uobj, new_uobj, attrs); + rdma_alloc_commit_uobject(new_uobj, attrs); + uobj_put_destroy(uobj); + new_uobj = NULL; + uobj = NULL; + mr = new_mr; + } else { + if (cmd.flags & IB_MR_REREG_PD) { + atomic_dec(&orig_pd->usecnt); + mr->pd = new_pd; + atomic_inc(&new_pd->usecnt); + } + if (cmd.flags & IB_MR_REREG_TRANS) { + mr->iova = cmd.hca_va; + mr->length = cmd.length; + } + } + + memset(&resp, 0, sizeof(resp)); + resp.lkey = mr->lkey; + resp.rkey = mr->rkey; + + ret = uverbs_response(attrs, &resp, sizeof(resp)); + +put_new_uobj: + if (new_uobj) + uobj_alloc_abort(new_uobj, attrs); +put_uobj_pd: + if (cmd.flags & IB_MR_REREG_PD) + uobj_put_obj_read(new_pd); + +put_uobjs: + if (uobj) + uobj_put_write(uobj); + + return ret; +} + +static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_dereg_mr cmd; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs); +} + +static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs) +{ + 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; + struct ib_device *ib_dev; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); + + pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); + if (!pd) { + ret = -EINVAL; + goto err_free; + } + + if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) { + ret = -EINVAL; + goto err_put; + } + + mw = rdma_zalloc_drv_obj(ib_dev, ib_mw); + if (!mw) { + ret = -ENOMEM; + goto err_put; + } + + mw->device = ib_dev; + mw->pd = pd; + mw->uobject = uobj; + mw->type = cmd.mw_type; + + ret = pd->device->ops.alloc_mw(mw, &attrs->driver_udata); + if (ret) + goto err_alloc; + + atomic_inc(&pd->usecnt); + + uobj->object = mw; + uobj_put_obj_read(pd); + uobj_finalize_uobj_create(uobj, attrs); + + resp.rkey = mw->rkey; + resp.mw_handle = uobj->id; + return uverbs_response(attrs, &resp, sizeof(resp)); + +err_alloc: + kfree(mw); +err_put: + uobj_put_obj_read(pd); +err_free: + uobj_alloc_abort(uobj, attrs); + return ret; +} + +static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_dealloc_mw cmd; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs); +} + +static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_create_comp_channel cmd; + struct ib_uverbs_create_comp_channel_resp resp; + struct ib_uobject *uobj; + struct ib_uverbs_completion_event_file *ev_file; + struct ib_device *ib_dev; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); + + ev_file = container_of(uobj, struct ib_uverbs_completion_event_file, + uobj); + ib_uverbs_init_event_queue(&ev_file->ev_queue); + uobj_finalize_uobj_create(uobj, attrs); + + resp.fd = uobj->id; + return uverbs_response(attrs, &resp, sizeof(resp)); +} + +static int create_cq(struct uverbs_attr_bundle *attrs, + struct ib_uverbs_ex_create_cq *cmd) +{ + struct ib_ucq_object *obj; + struct ib_uverbs_completion_event_file *ev_file = NULL; + struct ib_cq *cq; + int ret; + struct ib_uverbs_ex_create_cq_resp resp = {}; + struct ib_cq_init_attr attr = {}; + struct ib_device *ib_dev; + + if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors) + return -EINVAL; + + obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs, + &ib_dev); + if (IS_ERR(obj)) + return PTR_ERR(obj); + + if (cmd->comp_channel >= 0) { + ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs); + if (IS_ERR(ev_file)) { + ret = PTR_ERR(ev_file); + goto err; + } + } + + obj->uevent.uobject.user_handle = cmd->user_handle; + INIT_LIST_HEAD(&obj->comp_list); + INIT_LIST_HEAD(&obj->uevent.event_list); + + attr.cqe = cmd->cqe; + attr.comp_vector = cmd->comp_vector; + attr.flags = cmd->flags; + + cq = rdma_zalloc_drv_obj(ib_dev, ib_cq); + if (!cq) { + ret = -ENOMEM; + goto err_file; + } + cq->device = ib_dev; + cq->uobject = obj; + cq->comp_handler = ib_uverbs_comp_handler; + cq->event_handler = ib_uverbs_cq_event_handler; + cq->cq_context = ev_file ? &ev_file->ev_queue : NULL; + atomic_set(&cq->usecnt, 0); + + rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ); + rdma_restrack_set_name(&cq->res, NULL); + + ret = ib_dev->ops.create_cq(cq, &attr, &attrs->driver_udata); + if (ret) + goto err_free; + rdma_restrack_add(&cq->res); + + obj->uevent.uobject.object = cq; + obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); + if (obj->uevent.event_file) + uverbs_uobject_get(&obj->uevent.event_file->uobj); + uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); + + resp.base.cq_handle = obj->uevent.uobject.id; + resp.base.cqe = cq->cqe; + resp.response_length = uverbs_response_length(attrs, sizeof(resp)); + return uverbs_response(attrs, &resp, sizeof(resp)); + +err_free: + rdma_restrack_put(&cq->res); + kfree(cq); +err_file: + if (ev_file) + ib_uverbs_release_ucq(ev_file, obj); +err: + uobj_alloc_abort(&obj->uevent.uobject, attrs); + return ret; +} + +static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_create_cq cmd; + struct ib_uverbs_ex_create_cq cmd_ex; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + memset(&cmd_ex, 0, sizeof(cmd_ex)); + cmd_ex.user_handle = cmd.user_handle; + cmd_ex.cqe = cmd.cqe; + cmd_ex.comp_vector = cmd.comp_vector; + cmd_ex.comp_channel = cmd.comp_channel; + + return create_cq(attrs, &cmd_ex); +} + +static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_ex_create_cq cmd; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + if (cmd.comp_mask) + return -EINVAL; + + if (cmd.reserved) + return -EINVAL; + + return create_cq(attrs, &cmd); +} + +static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_resize_cq cmd; + struct ib_uverbs_resize_cq_resp resp = {}; + struct ib_cq *cq; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); + if (!cq) + return -EINVAL; + + ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata); + if (ret) + goto out; + + resp.cqe = cq->cqe; + + ret = uverbs_response(attrs, &resp, sizeof(resp)); +out: + rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + + return ret; +} + +static int copy_wc_to_user(struct ib_device *ib_dev, 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 = 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; + if (rdma_cap_opa_ah(ib_dev, wc->port_num)) + tmp.slid = OPA_TO_IB_UCAST_LID(wc->slid); + else + tmp.slid = ib_lid_cpu16(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; +} + +static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs) +{ + 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; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); + if (!cq) + return -EINVAL; + + /* we copy a struct ib_uverbs_poll_cq_resp to user space */ + header_ptr = attrs->ucore.outbuf; + 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(cq->device, 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 = 0; + + if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT)) + ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT); + +out_put: + rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + return ret; +} + +static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_req_notify_cq cmd; + struct ib_cq *cq; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); + if (!cq) + return -EINVAL; + + ib_req_notify_cq(cq, cmd.solicited_only ? + IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); + + rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + return 0; +} + +static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_destroy_cq cmd; + struct ib_uverbs_destroy_cq_resp resp; + struct ib_uobject *uobj; + struct ib_ucq_object *obj; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); + + obj = container_of(uobj, struct ib_ucq_object, uevent.uobject); + memset(&resp, 0, sizeof(resp)); + resp.comp_events_reported = obj->comp_events_reported; + resp.async_events_reported = obj->uevent.events_reported; + + uobj_put_destroy(uobj); + + return uverbs_response(attrs, &resp, sizeof(resp)); +} + +static int create_qp(struct uverbs_attr_bundle *attrs, + struct ib_uverbs_ex_create_qp *cmd) +{ + struct ib_uqp_object *obj; + struct ib_device *device; + struct ib_pd *pd = NULL; + struct ib_xrcd *xrcd = NULL; + struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT); + struct ib_cq *scq = NULL, *rcq = NULL; + struct ib_srq *srq = NULL; + struct ib_qp *qp; + struct ib_qp_init_attr attr = {}; + struct ib_uverbs_ex_create_qp_resp resp = {}; + int ret; + struct ib_rwq_ind_table *ind_tbl = NULL; + bool has_sq = true; + struct ib_device *ib_dev; + + switch (cmd->qp_type) { + case IB_QPT_RAW_PACKET: + if (!capable(CAP_NET_RAW)) + return -EPERM; + break; + case IB_QPT_RC: + case IB_QPT_UC: + case IB_QPT_UD: + case IB_QPT_XRC_INI: + case IB_QPT_XRC_TGT: + case IB_QPT_DRIVER: + break; + default: + return -EINVAL; + } + + obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, + &ib_dev); + if (IS_ERR(obj)) + return PTR_ERR(obj); + obj->uxrcd = NULL; + obj->uevent.uobject.user_handle = cmd->user_handle; + mutex_init(&obj->mcast_lock); + + if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) { + ind_tbl = uobj_get_obj_read(rwq_ind_table, + UVERBS_OBJECT_RWQ_IND_TBL, + cmd->rwq_ind_tbl_handle, attrs); + if (!ind_tbl) { + ret = -EINVAL; + goto err_put; + } + + attr.rwq_ind_tbl = ind_tbl; + } + + if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) { + ret = -EINVAL; + goto err_put; + } + + if (ind_tbl && !cmd->max_send_wr) + has_sq = false; + + if (cmd->qp_type == IB_QPT_XRC_TGT) { + xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle, + attrs); + + if (IS_ERR(xrcd_uobj)) { + ret = -EINVAL; + goto err_put; + } + + xrcd = (struct ib_xrcd *)xrcd_uobj->object; + if (!xrcd) { + ret = -EINVAL; + goto err_put; + } + device = xrcd->device; + } else { + if (cmd->qp_type == IB_QPT_XRC_INI) { + cmd->max_recv_wr = 0; + cmd->max_recv_sge = 0; + } else { + if (cmd->is_srq) { + srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, + cmd->srq_handle, attrs); + if (!srq || srq->srq_type == IB_SRQT_XRC) { + ret = -EINVAL; + goto err_put; + } + } + + if (!ind_tbl) { + if (cmd->recv_cq_handle != cmd->send_cq_handle) { + rcq = uobj_get_obj_read( + cq, UVERBS_OBJECT_CQ, + cmd->recv_cq_handle, attrs); + if (!rcq) { + ret = -EINVAL; + goto err_put; + } + } + } + } + + if (has_sq) + scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, + cmd->send_cq_handle, attrs); + if (!ind_tbl && cmd->qp_type != IB_QPT_XRC_INI) + rcq = rcq ?: scq; + pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, + attrs); + if (!pd || (!scq && has_sq)) { + ret = -EINVAL; + goto err_put; + } + + device = pd->device; + } + + attr.event_handler = ib_uverbs_qp_event_handler; + 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.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; + + INIT_LIST_HEAD(&obj->uevent.event_list); + INIT_LIST_HEAD(&obj->mcast_list); + + attr.create_flags = cmd->create_flags; + if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK | + IB_QP_CREATE_CROSS_CHANNEL | + IB_QP_CREATE_MANAGED_SEND | + IB_QP_CREATE_MANAGED_RECV | + IB_QP_CREATE_SCATTER_FCS | + IB_QP_CREATE_CVLAN_STRIPPING | + IB_QP_CREATE_SOURCE_QPN | + IB_QP_CREATE_PCI_WRITE_END_PADDING)) { + ret = -EINVAL; + goto err_put; + } + + if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) { + if (!capable(CAP_NET_RAW)) { + ret = -EPERM; + goto err_put; + } + + attr.source_qpn = cmd->source_qpn; + } + + qp = ib_create_qp_user(device, pd, &attr, &attrs->driver_udata, obj, + KBUILD_MODNAME); + if (IS_ERR(qp)) { + ret = PTR_ERR(qp); + goto err_put; + } + ib_qp_usecnt_inc(qp); + + obj->uevent.uobject.object = qp; + obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); + if (obj->uevent.event_file) + uverbs_uobject_get(&obj->uevent.event_file->uobj); + + if (xrcd) { + obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, + uobject); + atomic_inc(&obj->uxrcd->refcnt); + uobj_put_read(xrcd_uobj); + } + + if (pd) + uobj_put_obj_read(pd); + if (scq) + rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + if (rcq && rcq != scq) + rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + if (srq) + rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + if (ind_tbl) + uobj_put_obj_read(ind_tbl); + uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); + + resp.base.qpn = qp->qp_num; + resp.base.qp_handle = obj->uevent.uobject.id; + resp.base.max_recv_sge = attr.cap.max_recv_sge; + resp.base.max_send_sge = attr.cap.max_send_sge; + resp.base.max_recv_wr = attr.cap.max_recv_wr; + resp.base.max_send_wr = attr.cap.max_send_wr; + resp.base.max_inline_data = attr.cap.max_inline_data; + resp.response_length = uverbs_response_length(attrs, sizeof(resp)); + return uverbs_response(attrs, &resp, sizeof(resp)); + +err_put: + if (!IS_ERR(xrcd_uobj)) + uobj_put_read(xrcd_uobj); + if (pd) + uobj_put_obj_read(pd); + if (scq) + rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + if (rcq && rcq != scq) + rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + if (srq) + rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + if (ind_tbl) + uobj_put_obj_read(ind_tbl); + + uobj_alloc_abort(&obj->uevent.uobject, attrs); + return ret; +} + +static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_create_qp cmd; + struct ib_uverbs_ex_create_qp cmd_ex; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + memset(&cmd_ex, 0, sizeof(cmd_ex)); + cmd_ex.user_handle = cmd.user_handle; + cmd_ex.pd_handle = cmd.pd_handle; + cmd_ex.send_cq_handle = cmd.send_cq_handle; + cmd_ex.recv_cq_handle = cmd.recv_cq_handle; + cmd_ex.srq_handle = cmd.srq_handle; + cmd_ex.max_send_wr = cmd.max_send_wr; + cmd_ex.max_recv_wr = cmd.max_recv_wr; + cmd_ex.max_send_sge = cmd.max_send_sge; + cmd_ex.max_recv_sge = cmd.max_recv_sge; + cmd_ex.max_inline_data = cmd.max_inline_data; + cmd_ex.sq_sig_all = cmd.sq_sig_all; + cmd_ex.qp_type = cmd.qp_type; + cmd_ex.is_srq = cmd.is_srq; + + return create_qp(attrs, &cmd_ex); +} + +static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_ex_create_qp cmd; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK) + return -EINVAL; + + if (cmd.reserved) + return -EINVAL; + + return create_qp(attrs, &cmd); +} + +static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_create_qp_resp resp = {}; + struct ib_uverbs_open_qp cmd; + struct ib_uqp_object *obj; + struct ib_xrcd *xrcd; + struct ib_qp *qp; + struct ib_qp_open_attr attr = {}; + int ret; + struct ib_uobject *xrcd_uobj; + struct ib_device *ib_dev; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs, + &ib_dev); + if (IS_ERR(obj)) + return PTR_ERR(obj); + + xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs); + if (IS_ERR(xrcd_uobj)) { + ret = -EINVAL; + goto err_put; + } + + xrcd = (struct ib_xrcd *)xrcd_uobj->object; + if (!xrcd) { + ret = -EINVAL; + goto err_xrcd; + } + + attr.event_handler = ib_uverbs_qp_event_handler; + attr.qp_num = cmd.qpn; + attr.qp_type = cmd.qp_type; + + 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_xrcd; + } + + obj->uevent.uobject.object = qp; + obj->uevent.uobject.user_handle = cmd.user_handle; + + obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); + atomic_inc(&obj->uxrcd->refcnt); + qp->uobject = obj; + uobj_put_read(xrcd_uobj); + uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); + + resp.qpn = qp->qp_num; + resp.qp_handle = obj->uevent.uobject.id; + return uverbs_response(attrs, &resp, sizeof(resp)); + +err_xrcd: + uobj_put_read(xrcd_uobj); +err_put: + uobj_alloc_abort(&obj->uevent.uobject, attrs); + return ret; +} + +static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr, + struct rdma_ah_attr *rdma_attr) +{ + const struct ib_global_route *grh; + + uverb_attr->dlid = rdma_ah_get_dlid(rdma_attr); + uverb_attr->sl = rdma_ah_get_sl(rdma_attr); + uverb_attr->src_path_bits = rdma_ah_get_path_bits(rdma_attr); + uverb_attr->static_rate = rdma_ah_get_static_rate(rdma_attr); + uverb_attr->is_global = !!(rdma_ah_get_ah_flags(rdma_attr) & + IB_AH_GRH); + if (uverb_attr->is_global) { + grh = rdma_ah_read_grh(rdma_attr); + memcpy(uverb_attr->dgid, grh->dgid.raw, 16); + uverb_attr->flow_label = grh->flow_label; + uverb_attr->sgid_index = grh->sgid_index; + uverb_attr->hop_limit = grh->hop_limit; + uverb_attr->traffic_class = grh->traffic_class; + } + uverb_attr->port_num = rdma_ah_get_port_num(rdma_attr); +} + +static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs) +{ + 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; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + attr = kmalloc(sizeof *attr, GFP_KERNEL); + init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL); + if (!attr || !init_attr) { + ret = -ENOMEM; + goto out; + } + + qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); + if (!qp) { + ret = -EINVAL; + goto out; + } + + ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); + + rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + + 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; + + copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr); + copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr); + + 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; + + ret = uverbs_response(attrs, &resp, sizeof(resp)); + +out: + kfree(attr); + kfree(init_attr); + + return ret; +} + +/* 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; + } +} + +static void copy_ah_attr_from_uverbs(struct ib_device *dev, + struct rdma_ah_attr *rdma_attr, + struct ib_uverbs_qp_dest *uverb_attr) +{ + rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num); + if (uverb_attr->is_global) { + rdma_ah_set_grh(rdma_attr, NULL, + uverb_attr->flow_label, + uverb_attr->sgid_index, + uverb_attr->hop_limit, + uverb_attr->traffic_class); + rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid); + } else { + rdma_ah_set_ah_flags(rdma_attr, 0); + } + rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid); + rdma_ah_set_sl(rdma_attr, uverb_attr->sl); + rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits); + rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate); + rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num); + rdma_ah_set_make_grd(rdma_attr, false); +} + +static int modify_qp(struct uverbs_attr_bundle *attrs, + struct ib_uverbs_ex_modify_qp *cmd) +{ + struct ib_qp_attr *attr; + struct ib_qp *qp; + int ret; + + attr = kzalloc(sizeof(*attr), GFP_KERNEL); + if (!attr) + return -ENOMEM; + + qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle, + attrs); + if (!qp) { + ret = -EINVAL; + goto out; + } + + if ((cmd->base.attr_mask & IB_QP_PORT) && + !rdma_is_port_valid(qp->device, cmd->base.port_num)) { + ret = -EINVAL; + goto release_qp; + } + + if ((cmd->base.attr_mask & IB_QP_AV)) { + if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) { + ret = -EINVAL; + goto release_qp; + } + + if (cmd->base.attr_mask & IB_QP_STATE && + cmd->base.qp_state == IB_QPS_RTR) { + /* We are in INIT->RTR TRANSITION (if we are not, + * this transition will be rejected in subsequent checks). + * In the INIT->RTR transition, we cannot have IB_QP_PORT set, + * but the IB_QP_STATE flag is required. + * + * Since kernel 3.14 (commit dbf727de7440), the uverbs driver, + * when IB_QP_AV is set, has required inclusion of a valid + * port number in the primary AV. (AVs are created and handled + * differently for infiniband and ethernet (RoCE) ports). + * + * Check the port number included in the primary AV against + * the port number in the qp struct, which was set (and saved) + * in the RST->INIT transition. + */ + if (cmd->base.dest.port_num != qp->real_qp->port) { + ret = -EINVAL; + goto release_qp; + } + } else { + /* We are in SQD->SQD. (If we are not, this transition will + * be rejected later in the verbs layer checks). + * Check for both IB_QP_PORT and IB_QP_AV, these can be set + * together in the SQD->SQD transition. + * + * If only IP_QP_AV was set, add in IB_QP_PORT as well (the + * verbs layer driver does not track primary port changes + * resulting from path migration. Thus, in SQD, if the primary + * AV is modified, the primary port should also be modified). + * + * Note that in this transition, the IB_QP_STATE flag + * is not allowed. + */ + if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) + == (IB_QP_AV | IB_QP_PORT)) && + cmd->base.port_num != cmd->base.dest.port_num) { + ret = -EINVAL; + goto release_qp; + } + if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT)) + == IB_QP_AV) { + cmd->base.attr_mask |= IB_QP_PORT; + cmd->base.port_num = cmd->base.dest.port_num; + } + } + } + + if ((cmd->base.attr_mask & IB_QP_ALT_PATH) && + (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) || + !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) || + cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) { + ret = -EINVAL; + goto release_qp; + } + + if ((cmd->base.attr_mask & IB_QP_CUR_STATE && + cmd->base.cur_qp_state > IB_QPS_ERR) || + (cmd->base.attr_mask & IB_QP_STATE && + cmd->base.qp_state > IB_QPS_ERR)) { + ret = -EINVAL; + goto release_qp; + } + + if (cmd->base.attr_mask & IB_QP_STATE) + attr->qp_state = cmd->base.qp_state; + if (cmd->base.attr_mask & IB_QP_CUR_STATE) + attr->cur_qp_state = cmd->base.cur_qp_state; + if (cmd->base.attr_mask & IB_QP_PATH_MTU) + attr->path_mtu = cmd->base.path_mtu; + if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE) + attr->path_mig_state = cmd->base.path_mig_state; + if (cmd->base.attr_mask & IB_QP_QKEY) { + if (cmd->base.qkey & IB_QP_SET_QKEY && !capable(CAP_NET_RAW)) { + ret = -EPERM; + goto release_qp; + } + attr->qkey = cmd->base.qkey; + } + if (cmd->base.attr_mask & IB_QP_RQ_PSN) + attr->rq_psn = cmd->base.rq_psn; + if (cmd->base.attr_mask & IB_QP_SQ_PSN) + attr->sq_psn = cmd->base.sq_psn; + if (cmd->base.attr_mask & IB_QP_DEST_QPN) + attr->dest_qp_num = cmd->base.dest_qp_num; + if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS) + attr->qp_access_flags = cmd->base.qp_access_flags; + if (cmd->base.attr_mask & IB_QP_PKEY_INDEX) + attr->pkey_index = cmd->base.pkey_index; + if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) + attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify; + if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC) + attr->max_rd_atomic = cmd->base.max_rd_atomic; + if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) + attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic; + if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER) + attr->min_rnr_timer = cmd->base.min_rnr_timer; + if (cmd->base.attr_mask & IB_QP_PORT) + attr->port_num = cmd->base.port_num; + if (cmd->base.attr_mask & IB_QP_TIMEOUT) + attr->timeout = cmd->base.timeout; + if (cmd->base.attr_mask & IB_QP_RETRY_CNT) + attr->retry_cnt = cmd->base.retry_cnt; + if (cmd->base.attr_mask & IB_QP_RNR_RETRY) + attr->rnr_retry = cmd->base.rnr_retry; + if (cmd->base.attr_mask & IB_QP_ALT_PATH) { + attr->alt_port_num = cmd->base.alt_port_num; + attr->alt_timeout = cmd->base.alt_timeout; + attr->alt_pkey_index = cmd->base.alt_pkey_index; + } + if (cmd->base.attr_mask & IB_QP_RATE_LIMIT) + attr->rate_limit = cmd->rate_limit; + + if (cmd->base.attr_mask & IB_QP_AV) + copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr, + &cmd->base.dest); + + if (cmd->base.attr_mask & IB_QP_ALT_PATH) + copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr, + &cmd->base.alt_dest); + + ret = ib_modify_qp_with_udata(qp, attr, + modify_qp_mask(qp->qp_type, + cmd->base.attr_mask), + &attrs->driver_udata); + +release_qp: + rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); +out: + kfree(attr); + + return ret; +} + +static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_ex_modify_qp cmd; + int ret; + + ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base)); + if (ret) + return ret; + + if (cmd.base.attr_mask & ~IB_QP_ATTR_STANDARD_BITS) + return -EOPNOTSUPP; + + return modify_qp(attrs, &cmd); +} + +static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_ex_modify_qp cmd; + struct ib_uverbs_ex_modify_qp_resp resp = { + .response_length = uverbs_response_length(attrs, sizeof(resp)) + }; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + /* + * Last bit is reserved for extending the attr_mask by + * using another field. + */ + if (cmd.base.attr_mask & ~(IB_QP_ATTR_STANDARD_BITS | IB_QP_RATE_LIMIT)) + return -EOPNOTSUPP; + + ret = modify_qp(attrs, &cmd); + if (ret) + return ret; + + return uverbs_response(attrs, &resp, sizeof(resp)); +} + +static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_destroy_qp cmd; + struct ib_uverbs_destroy_qp_resp resp; + struct ib_uobject *uobj; + struct ib_uqp_object *obj; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); + + obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); + memset(&resp, 0, sizeof(resp)); + resp.events_reported = obj->uevent.events_reported; + + uobj_put_destroy(uobj); + + return uverbs_response(attrs, &resp, sizeof(resp)); +} + +static void *alloc_wr(size_t wr_size, __u32 num_sge) +{ + if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof(struct ib_sge))) / + sizeof(struct ib_sge)) + return NULL; + + return kmalloc(ALIGN(wr_size, sizeof(struct ib_sge)) + + num_sge * sizeof(struct ib_sge), + GFP_KERNEL); +} + +static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs) +{ + 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; + const struct ib_send_wr *bad_wr; + struct ib_qp *qp; + int i, sg_ind; + int is_ud; + int ret, ret2; + size_t next_size; + const struct ib_sge __user *sgls; + const void __user *wqes; + struct uverbs_req_iter iter; + + ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); + if (ret) + return ret; + wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count); + if (IS_ERR(wqes)) + return PTR_ERR(wqes); + sgls = uverbs_request_next_ptr( + &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge)); + if (IS_ERR(sgls)) + return PTR_ERR(sgls); + ret = uverbs_request_finish(&iter); + if (ret) + return ret; + + user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL); + if (!user_wr) + return -ENOMEM; + + qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); + if (!qp) { + ret = -EINVAL; + 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, wqes + 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; + } + + if (is_ud) { + struct ib_ud_wr *ud; + + if (user_wr->opcode != IB_WR_SEND && + user_wr->opcode != IB_WR_SEND_WITH_IMM) { + ret = -EINVAL; + goto out_put; + } + + next_size = sizeof(*ud); + ud = alloc_wr(next_size, user_wr->num_sge); + if (!ud) { + ret = -ENOMEM; + goto out_put; + } + + ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH, + user_wr->wr.ud.ah, attrs); + if (!ud->ah) { + kfree(ud); + ret = -EINVAL; + goto out_put; + } + ud->remote_qpn = user_wr->wr.ud.remote_qpn; + ud->remote_qkey = user_wr->wr.ud.remote_qkey; + + next = &ud->wr; + } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM || + user_wr->opcode == IB_WR_RDMA_WRITE || + user_wr->opcode == IB_WR_RDMA_READ) { + struct ib_rdma_wr *rdma; + + next_size = sizeof(*rdma); + rdma = alloc_wr(next_size, user_wr->num_sge); + if (!rdma) { + ret = -ENOMEM; + goto out_put; + } + + rdma->remote_addr = user_wr->wr.rdma.remote_addr; + rdma->rkey = user_wr->wr.rdma.rkey; + + next = &rdma->wr; + } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP || + user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) { + struct ib_atomic_wr *atomic; + + next_size = sizeof(*atomic); + atomic = alloc_wr(next_size, user_wr->num_sge); + if (!atomic) { + ret = -ENOMEM; + goto out_put; + } + + atomic->remote_addr = user_wr->wr.atomic.remote_addr; + atomic->compare_add = user_wr->wr.atomic.compare_add; + atomic->swap = user_wr->wr.atomic.swap; + atomic->rkey = user_wr->wr.atomic.rkey; + + next = &atomic->wr; + } else if (user_wr->opcode == IB_WR_SEND || + user_wr->opcode == IB_WR_SEND_WITH_IMM || + user_wr->opcode == IB_WR_SEND_WITH_INV) { + next_size = sizeof(*next); + next = alloc_wr(next_size, user_wr->num_sge); + if (!next) { + ret = -ENOMEM; + goto out_put; + } + } else { + ret = -EINVAL; + goto out_put; + } + + if (user_wr->opcode == IB_WR_SEND_WITH_IMM || + user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) { + next->ex.imm_data = + (__be32 __force) user_wr->ex.imm_data; + } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) { + next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey; + } + + 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 (next->num_sge) { + next->sg_list = (void *) next + + ALIGN(next_size, sizeof(struct ib_sge)); + if (copy_from_user(next->sg_list, sgls + sg_ind, + 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->ops.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; + } + + ret2 = uverbs_response(attrs, &resp, sizeof(resp)); + if (ret2) + ret = ret2; + +out_put: + rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + + while (wr) { + if (is_ud && ud_wr(wr)->ah) + uobj_put_obj_read(ud_wr(wr)->ah); + next = wr->next; + kfree(wr); + wr = next; + } + +out: + kfree(user_wr); + + return ret; +} + +static struct ib_recv_wr * +ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count, + u32 wqe_size, u32 sge_count) +{ + struct ib_uverbs_recv_wr *user_wr; + struct ib_recv_wr *wr = NULL, *last, *next; + int sg_ind; + int i; + int ret; + const struct ib_sge __user *sgls; + const void __user *wqes; + + if (wqe_size < sizeof(struct ib_uverbs_recv_wr)) + return ERR_PTR(-EINVAL); + + wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count); + if (IS_ERR(wqes)) + return ERR_CAST(wqes); + sgls = uverbs_request_next_ptr( + iter, sge_count * sizeof(struct ib_uverbs_sge)); + if (IS_ERR(sgls)) + return ERR_CAST(sgls); + ret = uverbs_request_finish(iter); + if (ret) + return ERR_PTR(ret); + + 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, wqes + i * wqe_size, + wqe_size)) { + ret = -EFAULT; + goto err; + } + + if (user_wr->num_sge + sg_ind > sge_count) { + ret = -EINVAL; + goto err; + } + + if (user_wr->num_sge >= + (U32_MAX - ALIGN(sizeof(*next), sizeof(struct ib_sge))) / + sizeof(struct ib_sge)) { + 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, sgls + sg_ind, + 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); +} + +static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_post_recv cmd; + struct ib_uverbs_post_recv_resp resp; + struct ib_recv_wr *wr, *next; + const struct ib_recv_wr *bad_wr; + struct ib_qp *qp; + int ret, ret2; + struct uverbs_req_iter iter; + + ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); + if (ret) + return ret; + + wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, + cmd.sge_count); + if (IS_ERR(wr)) + return PTR_ERR(wr); + + qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); + if (!qp) { + ret = -EINVAL; + goto out; + } + + resp.bad_wr = 0; + ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr); + + rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + if (ret) { + for (next = wr; next; next = next->next) { + ++resp.bad_wr; + if (next == bad_wr) + break; + } + } + + ret2 = uverbs_response(attrs, &resp, sizeof(resp)); + if (ret2) + ret = ret2; +out: + while (wr) { + next = wr->next; + kfree(wr); + wr = next; + } + + return ret; +} + +static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_post_srq_recv cmd; + struct ib_uverbs_post_srq_recv_resp resp; + struct ib_recv_wr *wr, *next; + const struct ib_recv_wr *bad_wr; + struct ib_srq *srq; + int ret, ret2; + struct uverbs_req_iter iter; + + ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); + if (ret) + return ret; + + wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size, + cmd.sge_count); + if (IS_ERR(wr)) + return PTR_ERR(wr); + + srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); + if (!srq) { + ret = -EINVAL; + goto out; + } + + resp.bad_wr = 0; + ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr); + + rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + + if (ret) + for (next = wr; next; next = next->next) { + ++resp.bad_wr; + if (next == bad_wr) + break; + } + + ret2 = uverbs_response(attrs, &resp, sizeof(resp)); + if (ret2) + ret = ret2; + +out: + while (wr) { + next = wr->next; + kfree(wr); + wr = next; + } + + return ret; +} + +static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs) +{ + 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 rdma_ah_attr attr = {}; + int ret; + struct ib_device *ib_dev; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); + + if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) { + ret = -EINVAL; + goto err; + } + + pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); + if (!pd) { + ret = -EINVAL; + goto err; + } + + attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num); + rdma_ah_set_make_grd(&attr, false); + rdma_ah_set_dlid(&attr, cmd.attr.dlid); + rdma_ah_set_sl(&attr, cmd.attr.sl); + rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits); + rdma_ah_set_static_rate(&attr, cmd.attr.static_rate); + rdma_ah_set_port_num(&attr, cmd.attr.port_num); + + if (cmd.attr.is_global) { + rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label, + cmd.attr.grh.sgid_index, + cmd.attr.grh.hop_limit, + cmd.attr.grh.traffic_class); + rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid); + } else { + rdma_ah_set_ah_flags(&attr, 0); + } + + ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata); + if (IS_ERR(ah)) { + ret = PTR_ERR(ah); + goto err_put; + } + + ah->uobject = uobj; + uobj->user_handle = cmd.user_handle; + uobj->object = ah; + uobj_put_obj_read(pd); + uobj_finalize_uobj_create(uobj, attrs); + + resp.ah_handle = uobj->id; + return uverbs_response(attrs, &resp, sizeof(resp)); + +err_put: + uobj_put_obj_read(pd); +err: + uobj_alloc_abort(uobj, attrs); + return ret; +} + +static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_destroy_ah cmd; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs); +} + +static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_attach_mcast cmd; + struct ib_qp *qp; + struct ib_uqp_object *obj; + struct ib_uverbs_mcast_entry *mcast; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); + if (!qp) + return -EINVAL; + + obj = qp->uobject; + + mutex_lock(&obj->mcast_lock); + 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: + mutex_unlock(&obj->mcast_lock); + rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + + return ret; +} + +static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_detach_mcast cmd; + struct ib_uqp_object *obj; + struct ib_qp *qp; + struct ib_uverbs_mcast_entry *mcast; + int ret; + bool found = false; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); + if (!qp) + return -EINVAL; + + obj = qp->uobject; + mutex_lock(&obj->mcast_lock); + + 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); + found = true; + break; + } + + if (!found) { + ret = -EINVAL; + goto out_put; + } + + ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid); + +out_put: + mutex_unlock(&obj->mcast_lock); + rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + return ret; +} + +struct ib_uflow_resources *flow_resources_alloc(size_t num_specs) +{ + struct ib_uflow_resources *resources; + + resources = kzalloc(sizeof(*resources), GFP_KERNEL); + + if (!resources) + return NULL; + + if (!num_specs) + goto out; + + resources->counters = + kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL); + resources->collection = + kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL); + + if (!resources->counters || !resources->collection) + goto err; + +out: + resources->max = num_specs; + return resources; + +err: + kfree(resources->counters); + kfree(resources); + + return NULL; +} +EXPORT_SYMBOL(flow_resources_alloc); + +void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res) +{ + unsigned int i; + + if (!uflow_res) + return; + + for (i = 0; i < uflow_res->collection_num; i++) + atomic_dec(&uflow_res->collection[i]->usecnt); + + for (i = 0; i < uflow_res->counters_num; i++) + atomic_dec(&uflow_res->counters[i]->usecnt); + + kfree(uflow_res->collection); + kfree(uflow_res->counters); + kfree(uflow_res); +} +EXPORT_SYMBOL(ib_uverbs_flow_resources_free); + +void flow_resources_add(struct ib_uflow_resources *uflow_res, + enum ib_flow_spec_type type, + void *ibobj) +{ + WARN_ON(uflow_res->num >= uflow_res->max); + + switch (type) { + case IB_FLOW_SPEC_ACTION_HANDLE: + atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt); + uflow_res->collection[uflow_res->collection_num++] = + (struct ib_flow_action *)ibobj; + break; + case IB_FLOW_SPEC_ACTION_COUNT: + atomic_inc(&((struct ib_counters *)ibobj)->usecnt); + uflow_res->counters[uflow_res->counters_num++] = + (struct ib_counters *)ibobj; + break; + default: + WARN_ON(1); + } + + uflow_res->num++; +} +EXPORT_SYMBOL(flow_resources_add); + +static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs, + struct ib_uverbs_flow_spec *kern_spec, + union ib_flow_spec *ib_spec, + struct ib_uflow_resources *uflow_res) +{ + ib_spec->type = kern_spec->type; + switch (ib_spec->type) { + case IB_FLOW_SPEC_ACTION_TAG: + if (kern_spec->flow_tag.size != + sizeof(struct ib_uverbs_flow_spec_action_tag)) + return -EINVAL; + + ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag); + ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id; + break; + case IB_FLOW_SPEC_ACTION_DROP: + if (kern_spec->drop.size != + sizeof(struct ib_uverbs_flow_spec_action_drop)) + return -EINVAL; + + ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop); + break; + case IB_FLOW_SPEC_ACTION_HANDLE: + if (kern_spec->action.size != + sizeof(struct ib_uverbs_flow_spec_action_handle)) + return -EOPNOTSUPP; + ib_spec->action.act = uobj_get_obj_read(flow_action, + UVERBS_OBJECT_FLOW_ACTION, + kern_spec->action.handle, + attrs); + if (!ib_spec->action.act) + return -EINVAL; + ib_spec->action.size = + sizeof(struct ib_flow_spec_action_handle); + flow_resources_add(uflow_res, + IB_FLOW_SPEC_ACTION_HANDLE, + ib_spec->action.act); + uobj_put_obj_read(ib_spec->action.act); + break; + case IB_FLOW_SPEC_ACTION_COUNT: + if (kern_spec->flow_count.size != + sizeof(struct ib_uverbs_flow_spec_action_count)) + return -EINVAL; + ib_spec->flow_count.counters = + uobj_get_obj_read(counters, + UVERBS_OBJECT_COUNTERS, + kern_spec->flow_count.handle, + attrs); + if (!ib_spec->flow_count.counters) + return -EINVAL; + ib_spec->flow_count.size = + sizeof(struct ib_flow_spec_action_count); + flow_resources_add(uflow_res, + IB_FLOW_SPEC_ACTION_COUNT, + ib_spec->flow_count.counters); + uobj_put_obj_read(ib_spec->flow_count.counters); + break; + default: + return -EINVAL; + } + return 0; +} + +static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size, + u16 ib_real_filter_sz) +{ + /* + * User space filter structures must be 64 bit aligned, otherwise this + * may pass, but we won't handle additional new attributes. + */ + + if (kern_filter_size > ib_real_filter_sz) { + if (memchr_inv(kern_spec_filter + + ib_real_filter_sz, 0, + kern_filter_size - ib_real_filter_sz)) + return -EINVAL; + return ib_real_filter_sz; + } + return kern_filter_size; +} + +int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type, + const void *kern_spec_mask, + const void *kern_spec_val, + size_t kern_filter_sz, + union ib_flow_spec *ib_spec) +{ + ssize_t actual_filter_sz; + ssize_t ib_filter_sz; + + /* User flow spec size must be aligned to 4 bytes */ + if (kern_filter_sz != ALIGN(kern_filter_sz, 4)) + return -EINVAL; + + ib_spec->type = type; + + if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL)) + return -EINVAL; + + switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) { + case IB_FLOW_SPEC_ETH: + ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz); + actual_filter_sz = spec_filter_size(kern_spec_mask, + kern_filter_sz, + ib_filter_sz); + if (actual_filter_sz <= 0) + return -EINVAL; + ib_spec->size = sizeof(struct ib_flow_spec_eth); + memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz); + memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz); + break; + case IB_FLOW_SPEC_IPV4: + ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz); + actual_filter_sz = spec_filter_size(kern_spec_mask, + kern_filter_sz, + ib_filter_sz); + if (actual_filter_sz <= 0) + return -EINVAL; + ib_spec->size = sizeof(struct ib_flow_spec_ipv4); + memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz); + memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz); + break; + case IB_FLOW_SPEC_IPV6: + ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz); + actual_filter_sz = spec_filter_size(kern_spec_mask, + kern_filter_sz, + ib_filter_sz); + if (actual_filter_sz <= 0) + return -EINVAL; + ib_spec->size = sizeof(struct ib_flow_spec_ipv6); + memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz); + memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz); + + if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) || + (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20)) + return -EINVAL; + break; + case IB_FLOW_SPEC_TCP: + case IB_FLOW_SPEC_UDP: + ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz); + actual_filter_sz = spec_filter_size(kern_spec_mask, + kern_filter_sz, + ib_filter_sz); + if (actual_filter_sz <= 0) + return -EINVAL; + ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp); + memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz); + memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz); + break; + case IB_FLOW_SPEC_VXLAN_TUNNEL: + ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz); + actual_filter_sz = spec_filter_size(kern_spec_mask, + kern_filter_sz, + ib_filter_sz); + if (actual_filter_sz <= 0) + return -EINVAL; + ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel); + memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz); + memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz); + + if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) || + (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24)) + return -EINVAL; + break; + case IB_FLOW_SPEC_ESP: + ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz); + actual_filter_sz = spec_filter_size(kern_spec_mask, + kern_filter_sz, + ib_filter_sz); + if (actual_filter_sz <= 0) + return -EINVAL; + ib_spec->esp.size = sizeof(struct ib_flow_spec_esp); + memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz); + memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz); + break; + case IB_FLOW_SPEC_GRE: + ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz); + actual_filter_sz = spec_filter_size(kern_spec_mask, + kern_filter_sz, + ib_filter_sz); + if (actual_filter_sz <= 0) + return -EINVAL; + ib_spec->gre.size = sizeof(struct ib_flow_spec_gre); + memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz); + memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz); + break; + case IB_FLOW_SPEC_MPLS: + ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz); + actual_filter_sz = spec_filter_size(kern_spec_mask, + kern_filter_sz, + ib_filter_sz); + if (actual_filter_sz <= 0) + return -EINVAL; + ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls); + memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz); + memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz); + break; + default: + return -EINVAL; + } + return 0; +} + +static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec, + union ib_flow_spec *ib_spec) +{ + size_t kern_filter_sz; + void *kern_spec_mask; + void *kern_spec_val; + + if (check_sub_overflow((size_t)kern_spec->hdr.size, + sizeof(struct ib_uverbs_flow_spec_hdr), + &kern_filter_sz)) + return -EINVAL; + + kern_filter_sz /= 2; + + kern_spec_val = (void *)kern_spec + + sizeof(struct ib_uverbs_flow_spec_hdr); + kern_spec_mask = kern_spec_val + kern_filter_sz; + + return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type, + kern_spec_mask, + kern_spec_val, + kern_filter_sz, ib_spec); +} + +static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs, + struct ib_uverbs_flow_spec *kern_spec, + union ib_flow_spec *ib_spec, + struct ib_uflow_resources *uflow_res) +{ + if (kern_spec->reserved) + return -EINVAL; + + if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG) + return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec, + uflow_res); + else + return kern_spec_to_ib_spec_filter(kern_spec, ib_spec); +} + +static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_ex_create_wq cmd; + struct ib_uverbs_ex_create_wq_resp resp = {}; + struct ib_uwq_object *obj; + int err = 0; + struct ib_cq *cq; + struct ib_pd *pd; + struct ib_wq *wq; + struct ib_wq_init_attr wq_init_attr = {}; + struct ib_device *ib_dev; + + err = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (err) + return err; + + if (cmd.comp_mask) + return -EOPNOTSUPP; + + obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs, + &ib_dev); + if (IS_ERR(obj)) + return PTR_ERR(obj); + + pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); + if (!pd) { + err = -EINVAL; + goto err_uobj; + } + + cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); + if (!cq) { + err = -EINVAL; + goto err_put_pd; + } + + wq_init_attr.cq = cq; + wq_init_attr.max_sge = cmd.max_sge; + wq_init_attr.max_wr = cmd.max_wr; + wq_init_attr.wq_type = cmd.wq_type; + wq_init_attr.event_handler = ib_uverbs_wq_event_handler; + wq_init_attr.create_flags = cmd.create_flags; + INIT_LIST_HEAD(&obj->uevent.event_list); + obj->uevent.uobject.user_handle = cmd.user_handle; + + wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata); + if (IS_ERR(wq)) { + err = PTR_ERR(wq); + goto err_put_cq; + } + + wq->uobject = obj; + obj->uevent.uobject.object = wq; + wq->wq_type = wq_init_attr.wq_type; + wq->cq = cq; + wq->pd = pd; + wq->device = pd->device; + atomic_set(&wq->usecnt, 0); + atomic_inc(&pd->usecnt); + atomic_inc(&cq->usecnt); + obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); + if (obj->uevent.event_file) + uverbs_uobject_get(&obj->uevent.event_file->uobj); + + uobj_put_obj_read(pd); + rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); + + resp.wq_handle = obj->uevent.uobject.id; + resp.max_sge = wq_init_attr.max_sge; + resp.max_wr = wq_init_attr.max_wr; + resp.wqn = wq->wq_num; + resp.response_length = uverbs_response_length(attrs, sizeof(resp)); + return uverbs_response(attrs, &resp, sizeof(resp)); + +err_put_cq: + rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); +err_put_pd: + uobj_put_obj_read(pd); +err_uobj: + uobj_alloc_abort(&obj->uevent.uobject, attrs); + + return err; +} + +static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_ex_destroy_wq cmd; + struct ib_uverbs_ex_destroy_wq_resp resp = {}; + struct ib_uobject *uobj; + struct ib_uwq_object *obj; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + if (cmd.comp_mask) + return -EOPNOTSUPP; + + resp.response_length = uverbs_response_length(attrs, sizeof(resp)); + uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); + + obj = container_of(uobj, struct ib_uwq_object, uevent.uobject); + resp.events_reported = obj->uevent.events_reported; + + uobj_put_destroy(uobj); + + return uverbs_response(attrs, &resp, sizeof(resp)); +} + +static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_ex_modify_wq cmd; + struct ib_wq *wq; + struct ib_wq_attr wq_attr = {}; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + if (!cmd.attr_mask) + return -EINVAL; + + if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS)) + return -EINVAL; + + wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); + if (!wq) + return -EINVAL; + + if (cmd.attr_mask & IB_WQ_FLAGS) { + wq_attr.flags = cmd.flags; + wq_attr.flags_mask = cmd.flags_mask; + } + + if (cmd.attr_mask & IB_WQ_CUR_STATE) { + if (cmd.curr_wq_state > IB_WQS_ERR) + return -EINVAL; + + wq_attr.curr_wq_state = cmd.curr_wq_state; + } else { + wq_attr.curr_wq_state = wq->state; + } + + if (cmd.attr_mask & IB_WQ_STATE) { + if (cmd.wq_state > IB_WQS_ERR) + return -EINVAL; + + wq_attr.wq_state = cmd.wq_state; + } else { + wq_attr.wq_state = wq_attr.curr_wq_state; + } + + ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask, + &attrs->driver_udata); + rdma_lookup_put_uobject(&wq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + return ret; +} + +static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_ex_create_rwq_ind_table cmd; + struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {}; + struct ib_uobject *uobj; + int err; + struct ib_rwq_ind_table_init_attr init_attr = {}; + struct ib_rwq_ind_table *rwq_ind_tbl; + struct ib_wq **wqs = NULL; + u32 *wqs_handles = NULL; + struct ib_wq *wq = NULL; + int i, num_read_wqs; + u32 num_wq_handles; + struct uverbs_req_iter iter; + struct ib_device *ib_dev; + + err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); + if (err) + return err; + + if (cmd.comp_mask) + return -EOPNOTSUPP; + + if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE) + return -EINVAL; + + num_wq_handles = 1 << cmd.log_ind_tbl_size; + wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles), + GFP_KERNEL); + if (!wqs_handles) + return -ENOMEM; + + err = uverbs_request_next(&iter, wqs_handles, + num_wq_handles * sizeof(__u32)); + if (err) + goto err_free; + + err = uverbs_request_finish(&iter); + if (err) + goto err_free; + + wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL); + if (!wqs) { + err = -ENOMEM; + goto err_free; + } + + for (num_read_wqs = 0; num_read_wqs < num_wq_handles; + num_read_wqs++) { + wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, + wqs_handles[num_read_wqs], attrs); + if (!wq) { + err = -EINVAL; + goto put_wqs; + } + + wqs[num_read_wqs] = wq; + atomic_inc(&wqs[num_read_wqs]->usecnt); + } + + uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev); + if (IS_ERR(uobj)) { + err = PTR_ERR(uobj); + goto put_wqs; + } + + rwq_ind_tbl = rdma_zalloc_drv_obj(ib_dev, ib_rwq_ind_table); + if (!rwq_ind_tbl) { + err = -ENOMEM; + goto err_uobj; + } + + init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size; + init_attr.ind_tbl = wqs; + + rwq_ind_tbl->ind_tbl = wqs; + rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size; + rwq_ind_tbl->uobject = uobj; + uobj->object = rwq_ind_tbl; + rwq_ind_tbl->device = ib_dev; + atomic_set(&rwq_ind_tbl->usecnt, 0); + + err = ib_dev->ops.create_rwq_ind_table(rwq_ind_tbl, &init_attr, + &attrs->driver_udata); + if (err) + goto err_create; + + for (i = 0; i < num_wq_handles; i++) + rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + kfree(wqs_handles); + uobj_finalize_uobj_create(uobj, attrs); + + resp.ind_tbl_handle = uobj->id; + resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num; + resp.response_length = uverbs_response_length(attrs, sizeof(resp)); + return uverbs_response(attrs, &resp, sizeof(resp)); + +err_create: + kfree(rwq_ind_tbl); +err_uobj: + uobj_alloc_abort(uobj, attrs); +put_wqs: + for (i = 0; i < num_read_wqs; i++) { + rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + atomic_dec(&wqs[i]->usecnt); + } +err_free: + kfree(wqs_handles); + kfree(wqs); + return err; +} + +static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_ex_destroy_rwq_ind_table cmd; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + if (cmd.comp_mask) + return -EOPNOTSUPP; + + return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL, + cmd.ind_tbl_handle, attrs); +} + +static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs) +{ + 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; + struct ib_uflow_resources *uflow_res; + struct ib_uverbs_flow_spec_hdr *kern_spec; + struct uverbs_req_iter iter; + int err; + void *ib_spec; + int i; + struct ib_device *ib_dev; + + err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd)); + if (err) + return err; + + if (cmd.comp_mask) + return -EINVAL; + + if (!capable(CAP_NET_RAW)) + return -EPERM; + + if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED) + return -EINVAL; + + if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) && + ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) || + (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT))) + return -EINVAL; + + if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS) + return -EINVAL; + + if (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; + + *kern_flow_attr = cmd.flow_attr; + err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs, + cmd.flow_attr.size); + if (err) + goto err_free_attr; + } else { + kern_flow_attr = &cmd.flow_attr; + } + + err = uverbs_request_finish(&iter); + if (err) + goto err_free_attr; + + uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev); + if (IS_ERR(uobj)) { + err = PTR_ERR(uobj); + goto err_free_attr; + } + + if (!rdma_is_port_valid(uobj->context->device, cmd.flow_attr.port)) { + err = -EINVAL; + goto err_uobj; + } + + qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); + if (!qp) { + err = -EINVAL; + goto err_uobj; + } + + if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) { + err = -EINVAL; + goto err_put; + } + + flow_attr = kzalloc(struct_size(flow_attr, flows, + cmd.flow_attr.num_of_specs), GFP_KERNEL); + if (!flow_attr) { + err = -ENOMEM; + goto err_put; + } + uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs); + if (!uflow_res) { + err = -ENOMEM; + goto err_free_flow_attr; + } + + 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->flow_specs; + ib_spec = flow_attr + 1; + for (i = 0; i < flow_attr->num_of_specs && + cmd.flow_attr.size >= sizeof(*kern_spec) && + cmd.flow_attr.size >= kern_spec->size; + i++) { + err = kern_spec_to_ib_spec( + attrs, (struct ib_uverbs_flow_spec *)kern_spec, + ib_spec, uflow_res); + if (err) + goto err_free; + + flow_attr->size += + ((union ib_flow_spec *) ib_spec)->size; + cmd.flow_attr.size -= kern_spec->size; + kern_spec = ((void *)kern_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: %u bytes left from uverb cmd\n", + i, cmd.flow_attr.size); + err = -EINVAL; + goto err_free; + } + + flow_id = qp->device->ops.create_flow(qp, flow_attr, + &attrs->driver_udata); + + if (IS_ERR(flow_id)) { + err = PTR_ERR(flow_id); + goto err_free; + } + + ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res); + + rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + kfree(flow_attr); + + if (cmd.flow_attr.num_of_specs) + kfree(kern_flow_attr); + uobj_finalize_uobj_create(uobj, attrs); + + resp.flow_handle = uobj->id; + return uverbs_response(attrs, &resp, sizeof(resp)); + +err_free: + ib_uverbs_flow_resources_free(uflow_res); +err_free_flow_attr: + kfree(flow_attr); +err_put: + rdma_lookup_put_uobject(&qp->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); +err_uobj: + uobj_alloc_abort(uobj, attrs); +err_free_attr: + if (cmd.flow_attr.num_of_specs) + kfree(kern_flow_attr); + return err; +} + +static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_destroy_flow cmd; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + if (cmd.comp_mask) + return -EINVAL; + + return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs); +} + +static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs, + 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_srq_init_attr attr; + int ret; + struct ib_uobject *xrcd_uobj; + struct ib_device *ib_dev; + + obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs, + &ib_dev); + if (IS_ERR(obj)) + return PTR_ERR(obj); + + if (cmd->srq_type == IB_SRQT_TM) + attr.ext.tag_matching.max_num_tags = cmd->max_num_tags; + + if (cmd->srq_type == IB_SRQT_XRC) { + xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle, + attrs); + if (IS_ERR(xrcd_uobj)) { + ret = -EINVAL; + goto err; + } + + attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object; + if (!attr.ext.xrc.xrcd) { + ret = -EINVAL; + goto err_put_xrcd; + } + + obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); + atomic_inc(&obj->uxrcd->refcnt); + } + + if (ib_srq_has_cq(cmd->srq_type)) { + attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, + cmd->cq_handle, attrs); + if (!attr.ext.cq) { + ret = -EINVAL; + goto err_put_xrcd; + } + } + + pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs); + if (!pd) { + ret = -EINVAL; + goto err_put_cq; + } + + attr.event_handler = ib_uverbs_srq_event_handler; + 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; + + INIT_LIST_HEAD(&obj->uevent.event_list); + obj->uevent.uobject.user_handle = cmd->user_handle; + + srq = ib_create_srq_user(pd, &attr, obj, udata); + if (IS_ERR(srq)) { + ret = PTR_ERR(srq); + goto err_put_pd; + } + + obj->uevent.uobject.object = srq; + obj->uevent.uobject.user_handle = cmd->user_handle; + obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file); + if (obj->uevent.event_file) + uverbs_uobject_get(&obj->uevent.event_file->uobj); + + if (cmd->srq_type == IB_SRQT_XRC) + resp.srqn = srq->ext.xrc.srq_num; + + if (cmd->srq_type == IB_SRQT_XRC) + uobj_put_read(xrcd_uobj); + + if (ib_srq_has_cq(cmd->srq_type)) + rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + + uobj_put_obj_read(pd); + uobj_finalize_uobj_create(&obj->uevent.uobject, attrs); + + resp.srq_handle = obj->uevent.uobject.id; + resp.max_wr = attr.attr.max_wr; + resp.max_sge = attr.attr.max_sge; + return uverbs_response(attrs, &resp, sizeof(resp)); + +err_put_pd: + uobj_put_obj_read(pd); +err_put_cq: + if (ib_srq_has_cq(cmd->srq_type)) + rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + +err_put_xrcd: + if (cmd->srq_type == IB_SRQT_XRC) { + atomic_dec(&obj->uxrcd->refcnt); + uobj_put_read(xrcd_uobj); + } + +err: + uobj_alloc_abort(&obj->uevent.uobject, attrs); + return ret; +} + +static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_create_srq cmd; + struct ib_uverbs_create_xsrq xcmd; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + memset(&xcmd, 0, sizeof(xcmd)); + 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; + + return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata); +} + +static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_create_xsrq cmd; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata); +} + +static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_modify_srq cmd; + struct ib_srq *srq; + struct ib_srq_attr attr; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); + if (!srq) + return -EINVAL; + + attr.max_wr = cmd.max_wr; + attr.srq_limit = cmd.srq_limit; + + ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask, + &attrs->driver_udata); + + rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + + return ret; +} + +static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_query_srq cmd; + struct ib_uverbs_query_srq_resp resp; + struct ib_srq_attr attr; + struct ib_srq *srq; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); + if (!srq) + return -EINVAL; + + ret = ib_query_srq(srq, &attr); + + rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + + 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; + + return uverbs_response(attrs, &resp, sizeof(resp)); +} + +static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_destroy_srq cmd; + struct ib_uverbs_destroy_srq_resp resp; + struct ib_uobject *uobj; + struct ib_uevent_object *obj; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); + + obj = container_of(uobj, struct ib_uevent_object, uobject); + memset(&resp, 0, sizeof(resp)); + resp.events_reported = obj->events_reported; + + uobj_put_destroy(uobj); + + return uverbs_response(attrs, &resp, sizeof(resp)); +} + +static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_ex_query_device_resp resp = {}; + struct ib_uverbs_ex_query_device cmd; + struct ib_device_attr attr = {0}; + struct ib_ucontext *ucontext; + struct ib_device *ib_dev; + int err; + + ucontext = ib_uverbs_get_ucontext(attrs); + if (IS_ERR(ucontext)) + return PTR_ERR(ucontext); + ib_dev = ucontext->device; + + err = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (err) + return err; + + if (cmd.comp_mask) + return -EINVAL; + + if (cmd.reserved) + return -EINVAL; + + err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata); + if (err) + return err; + + copy_query_dev_fields(ucontext, &resp.base, &attr); + + 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.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps; + + resp.timestamp_mask = attr.timestamp_mask; + resp.hca_core_clock = attr.hca_core_clock; + resp.device_cap_flags_ex = attr.device_cap_flags; + resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts; + resp.rss_caps.max_rwq_indirection_tables = + attr.rss_caps.max_rwq_indirection_tables; + resp.rss_caps.max_rwq_indirection_table_size = + attr.rss_caps.max_rwq_indirection_table_size; + resp.max_wq_type_rq = attr.max_wq_type_rq; + resp.raw_packet_caps = attr.raw_packet_caps; + resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size; + resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags; + resp.tm_caps.max_ops = attr.tm_caps.max_ops; + resp.tm_caps.max_sge = attr.tm_caps.max_sge; + resp.tm_caps.flags = attr.tm_caps.flags; + resp.cq_moderation_caps.max_cq_moderation_count = + attr.cq_caps.max_cq_moderation_count; + resp.cq_moderation_caps.max_cq_moderation_period = + attr.cq_caps.max_cq_moderation_period; + resp.max_dm_size = attr.max_dm_size; + resp.response_length = uverbs_response_length(attrs, sizeof(resp)); + + return uverbs_response(attrs, &resp, sizeof(resp)); +} + +static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs) +{ + struct ib_uverbs_ex_modify_cq cmd; + struct ib_cq *cq; + int ret; + + ret = uverbs_request(attrs, &cmd, sizeof(cmd)); + if (ret) + return ret; + + if (!cmd.attr_mask || cmd.reserved) + return -EINVAL; + + if (cmd.attr_mask > IB_CQ_MODERATE) + return -EOPNOTSUPP; + + cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); + if (!cq) + return -EINVAL; + + ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period); + + rdma_lookup_put_uobject(&cq->uobject->uevent.uobject, + UVERBS_LOOKUP_READ); + return ret; +} + +/* + * Describe the input structs for write(). Some write methods have an input + * only struct, most have an input and output. If the struct has an output then + * the 'response' u64 must be the first field in the request structure. + * + * If udata is present then both the request and response structs have a + * trailing driver_data flex array. In this case the size of the base struct + * cannot be changed. + */ +#define UAPI_DEF_WRITE_IO(req, resp) \ + .write.has_resp = 1 + \ + BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) + \ + BUILD_BUG_ON_ZERO(sizeof_field(req, response) != \ + sizeof(u64)), \ + .write.req_size = sizeof(req), .write.resp_size = sizeof(resp) + +#define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req) + +#define UAPI_DEF_WRITE_UDATA_IO(req, resp) \ + UAPI_DEF_WRITE_IO(req, resp), \ + .write.has_udata = \ + 1 + \ + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ + sizeof(req)) + \ + BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) != \ + sizeof(resp)) + +#define UAPI_DEF_WRITE_UDATA_I(req) \ + UAPI_DEF_WRITE_I(req), \ + .write.has_udata = \ + 1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \ + sizeof(req)) + +/* + * The _EX versions are for use with WRITE_EX and allow the last struct member + * to be specified. Buffers that do not include that member will be rejected. + */ +#define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member) \ + .write.has_resp = 1, \ + .write.req_size = offsetofend(req, req_last_member), \ + .write.resp_size = offsetofend(resp, resp_last_member) + +#define UAPI_DEF_WRITE_I_EX(req, req_last_member) \ + .write.req_size = offsetofend(req, req_last_member) + +const struct uapi_definition uverbs_def_write_intf[] = { + DECLARE_UVERBS_OBJECT( + UVERBS_OBJECT_AH, + DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH, + ib_uverbs_create_ah, + UAPI_DEF_WRITE_UDATA_IO( + struct ib_uverbs_create_ah, + struct ib_uverbs_create_ah_resp)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_DESTROY_AH, + ib_uverbs_destroy_ah, + UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah)), + UAPI_DEF_OBJ_NEEDS_FN(create_user_ah), + UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)), + + DECLARE_UVERBS_OBJECT( + UVERBS_OBJECT_COMP_CHANNEL, + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL, + ib_uverbs_create_comp_channel, + UAPI_DEF_WRITE_IO( + struct ib_uverbs_create_comp_channel, + struct ib_uverbs_create_comp_channel_resp))), + + DECLARE_UVERBS_OBJECT( + UVERBS_OBJECT_CQ, + DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ, + ib_uverbs_create_cq, + UAPI_DEF_WRITE_UDATA_IO( + struct ib_uverbs_create_cq, + struct ib_uverbs_create_cq_resp), + UAPI_DEF_METHOD_NEEDS_FN(create_cq)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_DESTROY_CQ, + ib_uverbs_destroy_cq, + UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq, + struct ib_uverbs_destroy_cq_resp), + UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_POLL_CQ, + ib_uverbs_poll_cq, + UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq, + struct ib_uverbs_poll_cq_resp), + UAPI_DEF_METHOD_NEEDS_FN(poll_cq)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_REQ_NOTIFY_CQ, + ib_uverbs_req_notify_cq, + UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq), + UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)), + DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ, + ib_uverbs_resize_cq, + UAPI_DEF_WRITE_UDATA_IO( + struct ib_uverbs_resize_cq, + struct ib_uverbs_resize_cq_resp), + UAPI_DEF_METHOD_NEEDS_FN(resize_cq)), + DECLARE_UVERBS_WRITE_EX( + IB_USER_VERBS_EX_CMD_CREATE_CQ, + ib_uverbs_ex_create_cq, + UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq, + reserved, + struct ib_uverbs_ex_create_cq_resp, + response_length), + UAPI_DEF_METHOD_NEEDS_FN(create_cq)), + DECLARE_UVERBS_WRITE_EX( + IB_USER_VERBS_EX_CMD_MODIFY_CQ, + ib_uverbs_ex_modify_cq, + UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq), + UAPI_DEF_METHOD_NEEDS_FN(modify_cq))), + + DECLARE_UVERBS_OBJECT( + UVERBS_OBJECT_DEVICE, + DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT, + ib_uverbs_get_context, + UAPI_DEF_WRITE_UDATA_IO( + struct ib_uverbs_get_context, + struct ib_uverbs_get_context_resp)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_QUERY_DEVICE, + ib_uverbs_query_device, + UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device, + struct ib_uverbs_query_device_resp)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_QUERY_PORT, + ib_uverbs_query_port, + UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port, + struct ib_uverbs_query_port_resp), + UAPI_DEF_METHOD_NEEDS_FN(query_port)), + DECLARE_UVERBS_WRITE_EX( + IB_USER_VERBS_EX_CMD_QUERY_DEVICE, + ib_uverbs_ex_query_device, + UAPI_DEF_WRITE_IO_EX( + struct ib_uverbs_ex_query_device, + reserved, + struct ib_uverbs_ex_query_device_resp, + response_length), + UAPI_DEF_METHOD_NEEDS_FN(query_device)), + UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext), + UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)), + + DECLARE_UVERBS_OBJECT( + UVERBS_OBJECT_FLOW, + DECLARE_UVERBS_WRITE_EX( + IB_USER_VERBS_EX_CMD_CREATE_FLOW, + ib_uverbs_ex_create_flow, + UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow, + flow_attr, + struct ib_uverbs_create_flow_resp, + flow_handle), + UAPI_DEF_METHOD_NEEDS_FN(create_flow)), + DECLARE_UVERBS_WRITE_EX( + IB_USER_VERBS_EX_CMD_DESTROY_FLOW, + ib_uverbs_ex_destroy_flow, + UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow), + UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))), + + DECLARE_UVERBS_OBJECT( + UVERBS_OBJECT_MR, + DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR, + ib_uverbs_dereg_mr, + UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr), + UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_REG_MR, + ib_uverbs_reg_mr, + UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr, + struct ib_uverbs_reg_mr_resp), + UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_REREG_MR, + ib_uverbs_rereg_mr, + UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr, + struct ib_uverbs_rereg_mr_resp), + UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))), + + DECLARE_UVERBS_OBJECT( + UVERBS_OBJECT_MW, + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_ALLOC_MW, + ib_uverbs_alloc_mw, + UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw, + struct ib_uverbs_alloc_mw_resp), + UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_DEALLOC_MW, + ib_uverbs_dealloc_mw, + UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw), + UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))), + + DECLARE_UVERBS_OBJECT( + UVERBS_OBJECT_PD, + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_ALLOC_PD, + ib_uverbs_alloc_pd, + UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd, + struct ib_uverbs_alloc_pd_resp), + UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_DEALLOC_PD, + ib_uverbs_dealloc_pd, + UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd), + UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))), + + DECLARE_UVERBS_OBJECT( + UVERBS_OBJECT_QP, + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_ATTACH_MCAST, + ib_uverbs_attach_mcast, + UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast), + UAPI_DEF_METHOD_NEEDS_FN(attach_mcast), + UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), + DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP, + ib_uverbs_create_qp, + UAPI_DEF_WRITE_UDATA_IO( + struct ib_uverbs_create_qp, + struct ib_uverbs_create_qp_resp), + UAPI_DEF_METHOD_NEEDS_FN(create_qp)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_DESTROY_QP, + ib_uverbs_destroy_qp, + UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp, + struct ib_uverbs_destroy_qp_resp), + UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_DETACH_MCAST, + ib_uverbs_detach_mcast, + UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast), + UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_MODIFY_QP, + ib_uverbs_modify_qp, + UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp), + UAPI_DEF_METHOD_NEEDS_FN(modify_qp)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_POST_RECV, + ib_uverbs_post_recv, + UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv, + struct ib_uverbs_post_recv_resp), + UAPI_DEF_METHOD_NEEDS_FN(post_recv)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_POST_SEND, + ib_uverbs_post_send, + UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send, + struct ib_uverbs_post_send_resp), + UAPI_DEF_METHOD_NEEDS_FN(post_send)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_QUERY_QP, + ib_uverbs_query_qp, + UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp, + struct ib_uverbs_query_qp_resp), + UAPI_DEF_METHOD_NEEDS_FN(query_qp)), + DECLARE_UVERBS_WRITE_EX( + IB_USER_VERBS_EX_CMD_CREATE_QP, + ib_uverbs_ex_create_qp, + UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp, + comp_mask, + struct ib_uverbs_ex_create_qp_resp, + response_length), + UAPI_DEF_METHOD_NEEDS_FN(create_qp)), + DECLARE_UVERBS_WRITE_EX( + IB_USER_VERBS_EX_CMD_MODIFY_QP, + ib_uverbs_ex_modify_qp, + UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp, + base, + struct ib_uverbs_ex_modify_qp_resp, + response_length), + UAPI_DEF_METHOD_NEEDS_FN(modify_qp))), + + DECLARE_UVERBS_OBJECT( + UVERBS_OBJECT_RWQ_IND_TBL, + DECLARE_UVERBS_WRITE_EX( + IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL, + ib_uverbs_ex_create_rwq_ind_table, + UAPI_DEF_WRITE_IO_EX( + struct ib_uverbs_ex_create_rwq_ind_table, + log_ind_tbl_size, + struct ib_uverbs_ex_create_rwq_ind_table_resp, + ind_tbl_num), + UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)), + DECLARE_UVERBS_WRITE_EX( + IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL, + ib_uverbs_ex_destroy_rwq_ind_table, + UAPI_DEF_WRITE_I( + struct ib_uverbs_ex_destroy_rwq_ind_table), + UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))), + + DECLARE_UVERBS_OBJECT( + UVERBS_OBJECT_WQ, + DECLARE_UVERBS_WRITE_EX( + IB_USER_VERBS_EX_CMD_CREATE_WQ, + ib_uverbs_ex_create_wq, + UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq, + max_sge, + struct ib_uverbs_ex_create_wq_resp, + wqn), + UAPI_DEF_METHOD_NEEDS_FN(create_wq)), + DECLARE_UVERBS_WRITE_EX( + IB_USER_VERBS_EX_CMD_DESTROY_WQ, + ib_uverbs_ex_destroy_wq, + UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq, + wq_handle, + struct ib_uverbs_ex_destroy_wq_resp, + reserved), + UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)), + DECLARE_UVERBS_WRITE_EX( + IB_USER_VERBS_EX_CMD_MODIFY_WQ, + ib_uverbs_ex_modify_wq, + UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq, + curr_wq_state), + UAPI_DEF_METHOD_NEEDS_FN(modify_wq))), + + DECLARE_UVERBS_OBJECT( + UVERBS_OBJECT_SRQ, + DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ, + ib_uverbs_create_srq, + UAPI_DEF_WRITE_UDATA_IO( + struct ib_uverbs_create_srq, + struct ib_uverbs_create_srq_resp), + UAPI_DEF_METHOD_NEEDS_FN(create_srq)), + DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ, + ib_uverbs_create_xsrq, + UAPI_DEF_WRITE_UDATA_IO( + struct ib_uverbs_create_xsrq, + struct ib_uverbs_create_srq_resp), + UAPI_DEF_METHOD_NEEDS_FN(create_srq)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_DESTROY_SRQ, + ib_uverbs_destroy_srq, + UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq, + struct ib_uverbs_destroy_srq_resp), + UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_MODIFY_SRQ, + ib_uverbs_modify_srq, + UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq), + UAPI_DEF_METHOD_NEEDS_FN(modify_srq)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_POST_SRQ_RECV, + ib_uverbs_post_srq_recv, + UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv, + struct ib_uverbs_post_srq_recv_resp), + UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)), + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_QUERY_SRQ, + ib_uverbs_query_srq, + UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq, + struct ib_uverbs_query_srq_resp), + UAPI_DEF_METHOD_NEEDS_FN(query_srq))), + + DECLARE_UVERBS_OBJECT( + UVERBS_OBJECT_XRCD, + DECLARE_UVERBS_WRITE( + IB_USER_VERBS_CMD_CLOSE_XRCD, + ib_uverbs_close_xrcd, + UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd)), + DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP, + ib_uverbs_open_qp, + UAPI_DEF_WRITE_UDATA_IO( + struct ib_uverbs_open_qp, + struct ib_uverbs_create_qp_resp)), + DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD, + ib_uverbs_open_xrcd, + UAPI_DEF_WRITE_UDATA_IO( + struct ib_uverbs_open_xrcd, + struct ib_uverbs_open_xrcd_resp)), + UAPI_DEF_OBJ_NEEDS_FN(alloc_xrcd), + UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)), + + {}, +}; |