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RDMA/uverbs: Use uverbs_attr_bundle to pass ucore for write/write_ex 

This creates a consistent way to access the two core buffers across write
and write_ex handlers.

Remove the open coded ucore conversion in the write/ex compatibility
handlers.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Jason Gunthorpe 2018-11-25 20:58:35 +02:00 committed by Doug Ledford
parent bbb28ad903
commit c2a939fda4
3 changed files with 31 additions and 46 deletions
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53
drivers/infiniband/core/uverbs_cmd.c
View File

@ -891,13 +891,11 @@ static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs,
}
static struct ib_ucq_object *create_cq(struct uverbs_attr_bundle *attrs,
struct ib_udata *ucore,
struct ib_uverbs_ex_create_cq *cmd,
size_t cmd_sz,
int (*cb)(struct uverbs_attr_bundle *attrs,
struct ib_ucq_object *obj,
struct ib_uverbs_ex_create_cq_resp *resp,
struct ib_udata *ucore,
void *context),
void *context)
{
@ -962,7 +960,7 @@ static struct ib_ucq_object *create_cq(struct uverbs_attr_bundle *attrs,
cq->res.type = RDMA_RESTRACK_CQ;
rdma_restrack_add(&cq->res);
ret = cb(attrs, obj, &resp, ucore, context);
ret = cb(attrs, obj, &resp, context);
if (ret)
goto err_cb;
@ -987,9 +985,9 @@ err:
static int ib_uverbs_create_cq_cb(struct uverbs_attr_bundle *attrs,
struct ib_ucq_object *obj,
struct ib_uverbs_ex_create_cq_resp *resp,
struct ib_udata *ucore, void *context)
void *context)
{
if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
if (ib_copy_to_udata(&attrs->ucore, &resp->base, sizeof(resp->base)))
return -EFAULT;
return 0;
@ -1000,23 +998,18 @@ 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_uverbs_create_cq_resp resp;
struct ib_udata ucore;
struct ib_ucq_object *obj;
if (copy_from_user(&cmd, buf, sizeof(cmd)))
return -EFAULT;
ib_uverbs_init_udata(&ucore, buf, u64_to_user_ptr(cmd.response),
sizeof(cmd), sizeof(resp));
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, &ucore, &cmd_ex,
obj = create_cq(attrs, &cmd_ex,
offsetof(typeof(cmd_ex), comp_channel) +
sizeof(cmd.comp_channel),
ib_uverbs_create_cq_cb, NULL);
@ -1026,9 +1019,9 @@ static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs,
static int ib_uverbs_ex_create_cq_cb(struct uverbs_attr_bundle *attrs,
struct ib_ucq_object *obj,
struct ib_uverbs_ex_create_cq_resp *resp,
struct ib_udata *ucore, void *context)
void *context)
{
if (ib_copy_to_udata(ucore, resp, resp->response_length))
if (ib_copy_to_udata(&attrs->ucore, resp, resp->response_length))
return -EFAULT;
return 0;
@ -1059,7 +1052,7 @@ static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs,
sizeof(resp.response_length)))
return -ENOSPC;
obj = create_cq(attrs, ucore, &cmd, min(ucore->inlen, sizeof(cmd)),
obj = create_cq(attrs, &cmd, min(ucore->inlen, sizeof(cmd)),
ib_uverbs_ex_create_cq_cb, NULL);
return PTR_ERR_OR_ZERO(obj);
@ -1144,7 +1137,7 @@ static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs,
return -EINVAL;
/* we copy a struct ib_uverbs_poll_cq_resp to user space */
header_ptr = u64_to_user_ptr(cmd.response);
header_ptr = attrs->ucore.outbuf;
data_ptr = header_ptr + sizeof resp;
memset(&resp, 0, sizeof resp);
@ -1226,12 +1219,9 @@ static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs,
}
static int create_qp(struct uverbs_attr_bundle *attrs,
struct ib_udata *ucore,
struct ib_uverbs_ex_create_qp *cmd,
size_t cmd_sz,
struct ib_uverbs_ex_create_qp *cmd, size_t cmd_sz,
int (*cb)(struct uverbs_attr_bundle *attrs,
struct ib_uverbs_ex_create_qp_resp *resp,
struct ib_udata *udata),
struct ib_uverbs_ex_create_qp_resp *resp),
void *context)
{
struct ib_uqp_object *obj;
@ -1276,7 +1266,7 @@ static int create_qp(struct uverbs_attr_bundle *attrs,
}
if (cmd_sz > sizeof(*cmd) &&
!ib_is_udata_cleared(ucore, sizeof(*cmd),
!ib_is_udata_cleared(&attrs->ucore, sizeof(*cmd),
cmd_sz - sizeof(*cmd))) {
ret = -EOPNOTSUPP;
goto err_put;
@ -1456,7 +1446,7 @@ static int create_qp(struct uverbs_attr_bundle *attrs,
resp.response_length = offsetof(typeof(resp), response_length) +
sizeof(resp.response_length);
ret = cb(attrs, &resp, ucore);
ret = cb(attrs, &resp);
if (ret)
goto err_cb;
@ -1501,10 +1491,9 @@ err_put:
}
static int ib_uverbs_create_qp_cb(struct uverbs_attr_bundle *attrs,
struct ib_uverbs_ex_create_qp_resp *resp,
struct ib_udata *ucore)
struct ib_uverbs_ex_create_qp_resp *resp)
{
if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
if (ib_copy_to_udata(&attrs->ucore, &resp->base, sizeof(resp->base)))
return -EFAULT;
return 0;
@ -1515,16 +1504,11 @@ 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;
struct ib_udata ucore;
ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp);
int err;
if (copy_from_user(&cmd, buf, sizeof(cmd)))
return -EFAULT;
ib_uverbs_init_udata(&ucore, buf, u64_to_user_ptr(cmd.response),
sizeof(cmd), resp_size);
memset(&cmd_ex, 0, sizeof(cmd_ex));
cmd_ex.user_handle = cmd.user_handle;
cmd_ex.pd_handle = cmd.pd_handle;
@ -1540,7 +1524,7 @@ static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs,
cmd_ex.qp_type = cmd.qp_type;
cmd_ex.is_srq = cmd.is_srq;
err = create_qp(attrs, &ucore, &cmd_ex,
err = create_qp(attrs, &cmd_ex,
offsetof(typeof(cmd_ex), is_srq) + sizeof(cmd.is_srq),
ib_uverbs_create_qp_cb, NULL);
@ -1551,10 +1535,9 @@ static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs,
}
static int ib_uverbs_ex_create_qp_cb(struct uverbs_attr_bundle *attrs,
struct ib_uverbs_ex_create_qp_resp *resp,
struct ib_udata *ucore)
struct ib_uverbs_ex_create_qp_resp *resp)
{
if (ib_copy_to_udata(ucore, resp, resp->response_length))
if (ib_copy_to_udata(&attrs->ucore, resp, resp->response_length))
return -EFAULT;
return 0;
@ -1585,7 +1568,7 @@ static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs,
sizeof(resp.response_length)))
return -ENOSPC;
err = create_qp(attrs, ucore, &cmd,
err = create_qp(attrs, &cmd,
min(ucore->inlen, sizeof(cmd)),
ib_uverbs_ex_create_qp_cb, NULL);

23
drivers/infiniband/core/uverbs_main.c
View File

@ -695,6 +695,7 @@ static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
if (!method_elm->is_ex) {
size_t in_len = hdr.in_words * 4 - sizeof(hdr);
size_t out_len = hdr.out_words * 4;
u64 response = 0;
if (method_elm->has_udata) {
bundle.driver_udata.inlen =
@ -710,8 +711,6 @@ static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
}
if (method_elm->has_resp) {
u64 response;
/*
* The macros check that if has_resp is set
* then the command request structure starts
@ -737,23 +736,25 @@ static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
bundle.driver_udata.outbuf = NULL;
}
ib_uverbs_init_udata_buf_or_null(
&bundle.ucore, buf, u64_to_user_ptr(response),
in_len, out_len);
ret = method_elm->handler(&bundle, buf, in_len, out_len);
} else {
struct ib_udata ucore;
buf += sizeof(ex_hdr);
ib_uverbs_init_udata_buf_or_null(&ucore, buf,
ib_uverbs_init_udata_buf_or_null(&bundle.ucore, buf,
u64_to_user_ptr(ex_hdr.response),
hdr.in_words * 8, hdr.out_words * 8);
ib_uverbs_init_udata_buf_or_null(&bundle.driver_udata,
buf + ucore.inlen,
u64_to_user_ptr(ex_hdr.response) + ucore.outlen,
ex_hdr.provider_in_words * 8,
ex_hdr.provider_out_words * 8);
ib_uverbs_init_udata_buf_or_null(
&bundle.driver_udata, buf + bundle.ucore.inlen,
u64_to_user_ptr(ex_hdr.response) + bundle.ucore.outlen,
ex_hdr.provider_in_words * 8,
ex_hdr.provider_out_words * 8);
ret = method_elm->handler_ex(&bundle, &ucore);
ret = method_elm->handler_ex(&bundle, &bundle.ucore);
}
out_unlock:

1
include/rdma/uverbs_ioctl.h
View File

@ -647,6 +647,7 @@ struct uverbs_attr {
struct uverbs_attr_bundle {
struct ib_udata driver_udata;
struct ib_udata ucore;
struct ib_uverbs_file *ufile;
DECLARE_BITMAP(attr_present, UVERBS_API_ATTR_BKEY_LEN);
struct uverbs_attr attrs[];