From: Matan Barak <matanb@xxxxxxxxxxxx>
Downstream patches extend uverbs_attr_spec with new fields.
In order to save space, we move the type and flags fields to
the various attribute flavors contained in the union.
Reviewed-by: Yishai Hadas <yishaih@xxxxxxxxxxxx>
Signed-off-by: Matan Barak <matanb@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
---
drivers/infiniband/core/uverbs_ioctl.c | 4 ++--
include/rdma/uverbs_ioctl.h | 34 ++++++++++++++++++++++------------
2 files changed, 24 insertions(+), 14 deletions(-)
diff --git a/drivers/infiniband/core/uverbs_ioctl.c b/drivers/infiniband/core/uverbs_ioctl.c
index 7016e729f139..82a1775ba657 100644
--- a/drivers/infiniband/core/uverbs_ioctl.c
+++ b/drivers/infiniband/core/uverbs_ioctl.c
@@ -69,9 +69,9 @@ static int uverbs_process_attr(struct ib_device *ibdev,
switch (spec->type) {
case UVERBS_ATTR_TYPE_PTR_IN:
case UVERBS_ATTR_TYPE_PTR_OUT:
- if (uattr->len < spec->len ||
+ if (uattr->len < spec->ptr.len ||
(!(spec->flags & UVERBS_ATTR_SPEC_F_MIN_SZ) &&
- uattr->len > spec->len))
+ uattr->len > spec->ptr.len))
return -EINVAL;
e->ptr_attr.data = uattr->data;
diff --git a/include/rdma/uverbs_ioctl.h b/include/rdma/uverbs_ioctl.h
index c0be2b5f6a1e..cd7c3e40c6cc 100644
--- a/include/rdma/uverbs_ioctl.h
+++ b/include/rdma/uverbs_ioctl.h
@@ -66,11 +66,25 @@ enum {
UVERBS_ATTR_SPEC_F_MIN_SZ = 1U << 1,
};
+/* Specification of a single attribute inside the ioctl message */
struct uverbs_attr_spec {
- enum uverbs_attr_type type;
union {
- u16 len;
+ /* Header shared by all following union members - to reduce space. */
struct {
+ enum uverbs_attr_type type;
+ /* Combination of bits from enum UVERBS_ATTR_SPEC_F_XXXX */
+ u8 flags;
+ };
+ struct {
+ enum uverbs_attr_type type;
+ /* Combination of bits from enum UVERBS_ATTR_SPEC_F_XXXX */
+ u8 flags;
+ u16 len;
+ } ptr;
+ struct {
+ enum uverbs_attr_type type;
+ /* Combination of bits from enum UVERBS_ATTR_SPEC_F_XXXX */
+ u8 flags;
/*
* higher bits mean the namespace and lower bits mean
* the type id within the namespace.
@@ -79,8 +93,6 @@ struct uverbs_attr_spec {
u8 access;
} obj;
};
- /* Combination of bits from enum UVERBS_ATTR_SPEC_F_XXXX */
- u8 flags;
};
struct uverbs_attr_spec_hash {
@@ -167,10 +179,10 @@ struct uverbs_object_tree_def {
#define UA_FLAGS(_flags) .flags = _flags
#define __UVERBS_ATTR0(_id, _len, _type, ...) \
((const struct uverbs_attr_def) \
- {.id = _id, .attr = {.type = _type, {.len = _len}, .flags = 0, } })
+ {.id = _id, .attr = {{.ptr = {.type = _type, .len = _len, .flags = 0, } }, } })
#define __UVERBS_ATTR1(_id, _len, _type, _flags) \
((const struct uverbs_attr_def) \
- {.id = _id, .attr = {.type = _type, {.len = _len}, _flags, } })
+ {.id = _id, .attr = {{.ptr = {.type = _type, .len = _len, _flags } },} })
#define __UVERBS_ATTR(_id, _len, _type, _flags, _n, ...) \
__UVERBS_ATTR##_n(_id, _len, _type, _flags)
/*
@@ -203,15 +215,13 @@ struct uverbs_object_tree_def {
#define ___UVERBS_ATTR_OBJ0(_id, _obj_class, _obj_type, _access, ...)\
((const struct uverbs_attr_def) \
{.id = _id, \
- .attr = {.type = _obj_class, \
- {.obj = {.obj_type = _obj_type, .access = _access } },\
- .flags = 0} })
+ .attr = { {.obj = {.type = _obj_class, .obj_type = _obj_type, \
+ .access = _access, .flags = 0 } }, } })
#define ___UVERBS_ATTR_OBJ1(_id, _obj_class, _obj_type, _access, _flags)\
((const struct uverbs_attr_def) \
{.id = _id, \
- .attr = {.type = _obj_class, \
- {.obj = {.obj_type = _obj_type, .access = _access} }, \
- _flags} })
+ .attr = { {.obj = {.type = _obj_class, .obj_type = _obj_type, \
+ .access = _access, _flags} }, } })
#define ___UVERBS_ATTR_OBJ(_id, _obj_class, _obj_type, _access, _flags, \
_n, ...) \
___UVERBS_ATTR_OBJ##_n(_id, _obj_class, _obj_type, _access, _flags)
--
2.16.2
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