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Commit 9a073857 authored by Jason Gunthorpe's avatar Jason Gunthorpe Committed by Doug Ledford
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RDMA/uverbs: Use uverbs_response() for remaining response copying 

This function properly truncates and zero-fills the response which is the
standard used by the ioctl uAPI when working with user data.
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 931373a1
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Showing with 52 additions and 81 deletions
drivers/infiniband/core/uverbs_cmd.c
View file @ 9a073857
......@@ -162,10 +162,9 @@ static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs,
goto err_fd;
}
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
ret = -EFAULT;
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret)
goto err_file;
}
fd_install(resp.async_fd, filp);
......@@ -263,10 +262,7 @@ static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs,
memset(&resp, 0, sizeof resp);
copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs);
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
return -EFAULT;
return 0;
return uverbs_response(attrs, &resp, sizeof(resp));
}
/*
......@@ -345,10 +341,7 @@ static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs,
resp.link_layer = rdma_port_get_link_layer(ib_dev,
cmd.port_num);
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
return -EFAULT;
return 0;
return uverbs_response(attrs, &resp, sizeof(resp));
}
static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs,
......@@ -385,10 +378,9 @@ static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs,
pd->res.type = RDMA_RESTRACK_PD;
rdma_restrack_add(&pd->res);
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
ret = -EFAULT;
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret)
goto err_copy;
}
return uobj_alloc_commit(uobj);
......@@ -575,10 +567,9 @@ static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs,
atomic_inc(&xrcd->usecnt);
}
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
ret = -EFAULT;
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret)
goto err_copy;
}
if (f.file)
fdput(f);
......@@ -707,10 +698,9 @@ static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs,
resp.rkey = mr->rkey;
resp.mr_handle = uobj->id;
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
ret = -EFAULT;
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret)
goto err_copy;
}
uobj_put_obj_read(pd);
......@@ -793,10 +783,7 @@ static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs,
resp.lkey = mr->lkey;
resp.rkey = mr->rkey;
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp)))
ret = -EFAULT;
else
ret = 0;
ret = uverbs_response(attrs, &resp, sizeof(resp));
put_uobj_pd:
if (cmd.flags & IB_MR_REREG_PD)
......@@ -860,10 +847,9 @@ static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs,
resp.rkey = mw->rkey;
resp.mw_handle = uobj->id;
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp))) {
ret = -EFAULT;
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret)
goto err_copy;
}
uobj_put_obj_read(pd);
return uobj_alloc_commit(uobj);
......@@ -897,6 +883,7 @@ static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs,
struct ib_uobject *uobj;
struct ib_uverbs_completion_event_file *ev_file;
struct ib_device *ib_dev;
int ret;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
......@@ -911,9 +898,10 @@ static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs,
uobj);
ib_uverbs_init_event_queue(&ev_file->ev_queue);
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret) {
uobj_alloc_abort(uobj);
return -EFAULT;
return ret;
}
return uobj_alloc_commit(uobj);
......@@ -1076,9 +1064,7 @@ static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs,
resp.cqe = cq->cqe;
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp.cqe))
ret = -EFAULT;
ret = uverbs_response(attrs, &resp, sizeof(resp));
out:
uobj_put_obj_read(cq);
......@@ -1209,10 +1195,7 @@ static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs,
uobj_put_destroy(uobj);
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
return -EFAULT;
return 0;
return uverbs_response(attrs, &resp, sizeof(resp));
}
static int create_qp(struct uverbs_attr_bundle *attrs,
......@@ -1593,10 +1576,9 @@ static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs,
resp.qpn = qp->qp_num;
resp.qp_handle = obj->uevent.uobject.id;
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
ret = -EFAULT;
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);
......@@ -1703,8 +1685,7 @@ static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs,
resp.max_inline_data = init_attr->cap.max_inline_data;
resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
ret = -EFAULT;
ret = uverbs_response(attrs, &resp, sizeof(resp));
out:
kfree(attr);
......@@ -1979,10 +1960,7 @@ static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs,
uobj_put_destroy(uobj);
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
return -EFAULT;
return 0;
return uverbs_response(attrs, &resp, sizeof(resp));
}
static void *alloc_wr(size_t wr_size, __u32 num_sge)
......@@ -2006,7 +1984,7 @@ static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs,
struct ib_qp *qp;
int i, sg_ind;
int is_ud;
ssize_t ret = -EINVAL;
int ret, ret2;
size_t next_size;
if (copy_from_user(&cmd, buf, sizeof cmd))
......@@ -2162,8 +2140,9 @@ static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs,
break;
}
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
ret = -EFAULT;
ret2 = uverbs_response(attrs, &resp, sizeof(resp));
if (ret2)
ret = ret2;
out_put:
uobj_put_obj_read(qp);
......@@ -2282,7 +2261,7 @@ static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs,
struct ib_recv_wr *wr, *next;
const struct ib_recv_wr *bad_wr;
struct ib_qp *qp;
ssize_t ret = -EINVAL;
int ret, ret2;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
......@@ -2294,8 +2273,10 @@ static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs,
return PTR_ERR(wr);
qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
if (!qp)
if (!qp) {
ret = -EINVAL;
goto out;
}
resp.bad_wr = 0;
ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
......@@ -2309,9 +2290,9 @@ static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs,
}
}
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
ret = -EFAULT;
ret2 = uverbs_response(attrs, &resp, sizeof(resp));
if (ret2)
ret = ret2;
out:
while (wr) {
next = wr->next;
......@@ -2331,7 +2312,7 @@ static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs,
struct ib_recv_wr *wr, *next;
const struct ib_recv_wr *bad_wr;
struct ib_srq *srq;
ssize_t ret = -EINVAL;
int ret, ret2;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
......@@ -2343,8 +2324,10 @@ static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs,
return PTR_ERR(wr);
srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
if (!srq)
if (!srq) {
ret = -EINVAL;
goto out;
}
resp.bad_wr = 0;
ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
......@@ -2358,8 +2341,9 @@ static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs,
break;
}
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
ret = -EFAULT;
ret2 = uverbs_response(attrs, &resp, sizeof(resp));
if (ret2)
ret = ret2;
out:
while (wr) {
......@@ -2431,10 +2415,9 @@ static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs,
resp.ah_handle = uobj->id;
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
ret = -EFAULT;
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret)
goto err_copy;
}
uobj_put_obj_read(pd);
return uobj_alloc_commit(uobj);
......@@ -2962,8 +2945,7 @@ static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs,
resp.max_wr = wq_init_attr.max_wr;
resp.wqn = wq->wq_num;
resp.response_length = required_resp_len;
err = ib_copy_to_udata(ucore,
&resp, resp.response_length);
err = uverbs_response(attrs, &resp, sizeof(resp));
if (err)
goto err_copy;
......@@ -3025,7 +3007,7 @@ static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs,
uobj_put_destroy(uobj);
return ib_copy_to_udata(ucore, &resp, resp.response_length);
return uverbs_response(attrs, &resp, sizeof(resp));
}
static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs,
......@@ -3186,8 +3168,7 @@ static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs,
resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
resp.response_length = required_resp_len;
err = ib_copy_to_udata(ucore,
&resp, resp.response_length);
err = uverbs_response(attrs, &resp, sizeof(resp));
if (err)
goto err_copy;
......@@ -3384,8 +3365,7 @@ static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs,
memset(&resp, 0, sizeof(resp));
resp.flow_handle = uobj->id;
err = ib_copy_to_udata(ucore,
&resp, sizeof(resp));
err = uverbs_response(attrs, &resp, sizeof(resp));
if (err)
goto err_copy;
......@@ -3530,11 +3510,9 @@ static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs,
if (cmd->srq_type == IB_SRQT_XRC)
resp.srqn = srq->ext.xrc.srq_num;
if (copy_to_user(u64_to_user_ptr(cmd->response),
&resp, sizeof resp)) {
ret = -EFAULT;
ret = uverbs_response(attrs, &resp, sizeof(resp));
if (ret)
goto err_copy;
}
if (cmd->srq_type == IB_SRQT_XRC)
uobj_put_read(xrcd_uobj);
......@@ -3654,10 +3632,7 @@ static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs,
resp.max_sge = attr.max_sge;
resp.srq_limit = attr.srq_limit;
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
return -EFAULT;
return 0;
return uverbs_response(attrs, &resp, sizeof(resp));
}
static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs,
......@@ -3682,10 +3657,7 @@ static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs,
uobj_put_destroy(uobj);
if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp)))
return -EFAULT;
return 0;
return uverbs_response(attrs, &resp, sizeof(resp));
}
static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs,
......@@ -3807,8 +3779,7 @@ static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs,
resp.max_dm_size = attr.max_dm_size;
resp.response_length += sizeof(resp.max_dm_size);
end:
err = ib_copy_to_udata(ucore, &resp, resp.response_length);
return err;
return uverbs_response(attrs, &resp, sizeof(resp));
}
static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs,
......
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