blob: 025933752e1da5235638c6080f1548c1894376c1 [file] [log] [blame]
/*
* 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->res.type = RDMA_RESTRACK_CTX;
ucontext->device = ib_dev;
ucontext->ufile = ufile;
xa_init_flags(&ucontext->mmap_xa, XA_FLAGS_ALLOC);
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_uadd(&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);
err_ucontext:
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_fmr = attr->max_fmr;
resp->max_map_per_fmr = attr->max_map_per_fmr;
resp->max_srq = attr->max_srq;
resp->max_srq_wr = attr->max_srq_wr;
resp->max_srq_sge = attr->max_srq_sge;
resp->max_pkeys = attr->max_pkeys;
resp->local_ca_ack_delay = attr->local_ca_ack_delay;
resp->phys_port_cnt = ib_dev->phys_port_cnt;
}
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 cmd;
struct ib_uverbs_alloc_pd_resp resp;
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;
pd->__internal_mr = NULL;
atomic_set(&pd->usecnt, 0);
pd->res.type = RDMA_RESTRACK_PD;
ret = ib_dev->ops.alloc_pd(pd, &attrs->driver_udata);
if (ret)
goto err_alloc;
uobj->object = pd;
memset(&resp, 0, sizeof resp);
resp.pd_handle = uobj->id;
rdma_restrack_uadd(&pd->res);
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret)
goto err_copy;
rdma_alloc_commit_uobject(uobj, attrs);
return 0;
err_copy:
ib_dealloc_pd_user(pd, uverbs_get_cleared_udata(attrs));
pd = NULL;
err_alloc:
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 cmd;
struct ib_uverbs_open_xrcd_resp resp;
struct ib_uxrcd_object *obj;
struct ib_xrcd *xrcd = NULL;
struct fd f = {NULL, 0};
struct inode *inode = NULL;
int ret = 0;
int new_xrcd = 0;
struct ib_device *ib_dev;
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_dev->ops.alloc_xrcd(ib_dev, &attrs->driver_udata);
if (IS_ERR(xrcd)) {
ret = PTR_ERR(xrcd);
goto err;
}
xrcd->inode = inode;
xrcd->device = ib_dev;
atomic_set(&xrcd->usecnt, 0);
mutex_init(&xrcd->tgt_qp_mutex);
INIT_LIST_HEAD(&xrcd->tgt_qp_list);
new_xrcd = 1;
}
atomic_set(&obj->refcnt, 0);
obj->uobject.object = xrcd;
memset(&resp, 0, sizeof resp);
resp.xrcd_handle = obj->uobject.id;
if (inode) {
if (new_xrcd) {
/* create new inode/xrcd table entry */
ret = xrcd_table_insert(ibudev, inode, xrcd);
if (ret)
goto err_dealloc_xrcd;
}
atomic_inc(&xrcd->usecnt);
}
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret)
goto err_copy;
if (f.file)
fdput(f);
mutex_unlock(&ibudev->xrcd_tree_mutex);
rdma_alloc_commit_uobject(&obj->uobject, attrs);
return 0;
err_copy:
if (inode) {
if (new_xrcd)
xrcd_table_delete(ibudev, inode);
atomic_dec(&xrcd->usecnt);
}
err_dealloc_xrcd:
ib_dealloc_xrcd(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(xrcd, &attrs->driver_udata);
if (ib_is_destroy_retryable(ret, why, uobject)) {
atomic_inc(&xrcd->usecnt);
return ret;
}
if (inode)
xrcd_table_delete(dev, inode);
return ret;
}
static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs)
{
struct ib_uverbs_reg_mr cmd;
struct ib_uverbs_reg_mr_resp resp;
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;
ret = ib_check_mr_access(cmd.access_flags);
if (ret)
return ret;
uobj = uobj_alloc(UVERBS_OBJECT_MR, 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.access_flags & IB_ACCESS_ON_DEMAND) {
if (!(pd->device->attrs.device_cap_flags &
IB_DEVICE_ON_DEMAND_PAGING)) {
pr_debug("ODP support not available\n");
ret = -EINVAL;
goto err_put;
}
}
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->res.type = RDMA_RESTRACK_MR;
rdma_restrack_uadd(&mr->res);
uobj->object = mr;
memset(&resp, 0, sizeof resp);
resp.lkey = mr->lkey;
resp.rkey = mr->rkey;
resp.mr_handle = uobj->id;
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret)
goto err_copy;
uobj_put_obj_read(pd);
rdma_alloc_commit_uobject(uobj, attrs);
return 0;
err_copy:
ib_dereg_mr_user(mr, uverbs_get_cleared_udata(attrs));
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_pd *pd = NULL;
struct ib_mr *mr;
struct ib_pd *old_pd;
int ret;
struct ib_uobject *uobj;
ret = uverbs_request(attrs, &cmd, sizeof(cmd));
if (ret)
return ret;
if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
return -EINVAL;
if ((cmd.flags & IB_MR_REREG_TRANS) &&
(!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
(cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
return -EINVAL;
uobj = 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(cmd.access_flags);
if (ret)
goto put_uobjs;
}
if (cmd.flags & IB_MR_REREG_PD) {
pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle,
attrs);
if (!pd) {
ret = -EINVAL;
goto put_uobjs;
}
}
old_pd = mr->pd;
ret = mr->device->ops.rereg_user_mr(mr, cmd.flags, cmd.start,
cmd.length, cmd.hca_va,
cmd.access_flags, pd,
&attrs->driver_udata);
if (ret)
goto put_uobj_pd;
if (cmd.flags & IB_MR_REREG_PD) {
atomic_inc(&pd->usecnt);
mr->pd = pd;
atomic_dec(&old_pd->usecnt);
}
memset(&resp, 0, sizeof(resp));
resp.lkey = mr->lkey;
resp.rkey = mr->rkey;
ret = uverbs_response(attrs, &resp, sizeof(resp));
put_uobj_pd:
if (cmd.flags & IB_MR_REREG_PD)
uobj_put_obj_read(pd);
put_uobjs:
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 = pd->device->ops.alloc_mw(pd, cmd.mw_type, &attrs->driver_udata);
if (IS_ERR(mw)) {
ret = PTR_ERR(mw);
goto err_put;
}
mw->device = pd->device;
mw->pd = pd;
mw->uobject = uobj;
atomic_inc(&pd->usecnt);
uobj->object = mw;
memset(&resp, 0, sizeof(resp));
resp.rkey = mw->rkey;
resp.mw_handle = uobj->id;
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret)
goto err_copy;
uobj_put_obj_read(pd);
rdma_alloc_commit_uobject(uobj, attrs);
return 0;
err_copy:
uverbs_dealloc_mw(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);
resp.fd = uobj->id;
ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
uobj);
ib_uverbs_init_event_queue(&ev_file->ev_queue);
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret) {
uobj_alloc_abort(uobj, attrs);
return ret;
}
rdma_alloc_commit_uobject(uobj, attrs);
return 0;
}
static struct ib_ucq_object *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 ERR_PTR(-EINVAL);
obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs,
&ib_dev);
if (IS_ERR(obj))
return 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);
ret = ib_dev->ops.create_cq(cq, &attr, &attrs->driver_udata);
if (ret)
goto err_free;
obj->uevent.uobject.object = cq;
memset(&resp, 0, sizeof resp);
resp.base.cq_handle = obj->uevent.uobject.id;
resp.base.cqe = cq->cqe;
resp.response_length = uverbs_response_length(attrs, sizeof(resp));
cq->res.type = RDMA_RESTRACK_CQ;
rdma_restrack_uadd(&cq->res);
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret)
goto err_cb;
rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs);
return obj;
err_cb:
ib_destroy_cq_user(cq, uverbs_get_cleared_udata(attrs));
cq = NULL;
err_free:
kfree(cq);
err_file:
if (ev_file)
ib_uverbs_release_ucq(ev_file, obj);
err:
uobj_alloc_abort(&obj->uevent.uobject, attrs);
return ERR_PTR(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;
struct ib_ucq_object *obj;
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;
obj = create_cq(attrs, &cmd_ex);
return PTR_ERR_OR_ZERO(obj);
}
static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs)
{
struct ib_uverbs_ex_create_cq cmd;
struct ib_ucq_object *obj;
int ret;
ret = uverbs_request(attrs, &cmd, sizeof(cmd));
if (ret)
return ret;
if (cmd.comp_mask)
return -EINVAL;
if (cmd.reserved)
return -EINVAL;
obj = create_cq(attrs, &cmd);
return PTR_ERR_OR_ZERO(obj);
}
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 = -EINVAL;
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;
if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
return -EPERM;
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)
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.create_flags = 0;
attr.cap.max_send_wr = cmd->max_send_wr;
attr.cap.max_recv_wr = cmd->max_recv_wr;
attr.cap.max_send_sge = cmd->max_send_sge;
attr.cap.max_recv_sge = cmd->max_recv_sge;
attr.cap.max_inline_data = cmd->max_inline_data;
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;
}
if (cmd->qp_type == IB_QPT_XRC_TGT)
qp = ib_create_qp(pd, &attr);
else
qp = _ib_create_qp(device, pd, &attr, &attrs->driver_udata,
obj);
if (IS_ERR(qp)) {
ret = PTR_ERR(qp);
goto err_put;
}
if (cmd->qp_type != IB_QPT_XRC_TGT) {
ret = ib_create_qp_security(qp, device);
if (ret)
goto err_cb;
qp->pd = pd;
qp->send_cq = attr.send_cq;
qp->recv_cq = attr.recv_cq;
qp->srq = attr.srq;
qp->rwq_ind_tbl = ind_tbl;
qp->event_handler = attr.event_handler;
qp->qp_type = attr.qp_type;
atomic_set(&qp->usecnt, 0);
atomic_inc(&pd->usecnt);
qp->port = 0;
if (attr.send_cq)
atomic_inc(&attr.send_cq->usecnt);
if (attr.recv_cq)
atomic_inc(&attr.recv_cq->usecnt);
if (attr.srq)
atomic_inc(&attr.srq->usecnt);
if (ind_tbl)
atomic_inc(&ind_tbl->usecnt);
} else {
/* It is done in _ib_create_qp for other QP types */
qp->uobject = obj;
}
obj->uevent.uobject.object = qp;
memset(&resp, 0, sizeof resp);
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));
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret)
goto err_cb;
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);
rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs);
return 0;
err_cb:
ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs));
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_open_qp cmd;
struct ib_uverbs_create_qp_resp resp;
struct ib_uqp_object *obj;
struct ib_xrcd *xrcd;
struct ib_uobject *uninitialized_var(xrcd_uobj);
struct ib_qp *qp;
struct ib_qp_open_attr attr = {};
int ret;
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;
memset(&resp, 0, sizeof resp);
resp.qpn = qp->qp_num;
resp.qp_handle = obj->uevent.uobject.id;
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret)
goto err_destroy;
obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
atomic_inc(&obj->uxrcd->refcnt);
qp->uobject = obj;
uobj_put_read(xrcd_uobj);
rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs);
return 0;
err_destroy:
ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs));
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)
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_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
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.
*/
BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
if (cmd.base.attr_mask &
~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
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;
resp.ah_handle = uobj->id;
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret)
goto err_copy;
uobj_put_obj_read(pd);
rdma_alloc_commit_uobject(uobj, attrs);
return 0;
err_copy:
rdma_destroy_ah_user(ah, RDMA_DESTROY_AH_SLEEPABLE,
uverbs_get_cleared_udata(attrs));
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);