#include <linux/uaccess.h>
#include <rdma/rdma_user_ioctl.h>
#include <rdma/ib_user_ioctl_verbs.h>
+#include <rdma/ib_user_ioctl_cmds.h>
/*
* =======================================
UVERBS_ATTR_TYPE_PTR_OUT,
UVERBS_ATTR_TYPE_IDR,
UVERBS_ATTR_TYPE_FD,
+ UVERBS_ATTR_TYPE_ENUM_IN,
};
enum uverbs_obj_access {
enum {
UVERBS_ATTR_SPEC_F_MANDATORY = 1U << 0,
- /* Support extending attributes by length */
- UVERBS_ATTR_SPEC_F_MIN_SZ = 1U << 1,
+ /* Support extending attributes by length, validate all unknown size == zero */
+ UVERBS_ATTR_SPEC_F_MIN_SZ_OR_ZERO = 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;
+ /* Current known size to kernel */
+ u16 len;
+ /* User isn't allowed to provide something < min_len */
+ u16 min_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.
u16 obj_type;
u8 access;
} obj;
+ struct {
+ enum uverbs_attr_type type;
+ /* Combination of bits from enum UVERBS_ATTR_SPEC_F_XXXX */
+ u8 flags;
+ u8 num_elems;
+ /*
+ * The enum attribute can select one of the attributes
+ * contained in the ids array. Currently only PTR_IN
+ * attributes are supported in the ids array.
+ */
+ const struct uverbs_attr_spec *ids;
+ } enum_def;
};
- /* Combination of bits from enum UVERBS_ATTR_SPEC_F_XXXX */
- u8 flags;
};
struct uverbs_attr_spec_hash {
};
#define UA_FLAGS(_flags) .flags = _flags
-#define __UVERBS_ATTR0(_id, _len, _type, ...) \
+#define __UVERBS_ATTR0(_id, _type, _fld, _attr, ...) \
((const struct uverbs_attr_def) \
- {.id = _id, .attr = {.type = _type, {.len = _len}, .flags = 0, } })
-#define __UVERBS_ATTR1(_id, _len, _type, _flags) \
+ {.id = _id, .attr = {{._fld = {.type = _type, _attr, .flags = 0, } }, } })
+#define __UVERBS_ATTR1(_id, _type, _fld, _attr, _extra1, ...) \
((const struct uverbs_attr_def) \
- {.id = _id, .attr = {.type = _type, {.len = _len}, _flags, } })
-#define __UVERBS_ATTR(_id, _len, _type, _flags, _n, ...) \
- __UVERBS_ATTR##_n(_id, _len, _type, _flags)
+ {.id = _id, .attr = {{._fld = {.type = _type, _attr, _extra1 } },} })
+#define __UVERBS_ATTR2(_id, _type, _fld, _attr, _extra1, _extra2) \
+ ((const struct uverbs_attr_def) \
+ {.id = _id, .attr = {{._fld = {.type = _type, _attr, _extra1, _extra2 } },} })
+#define __UVERBS_ATTR(_id, _type, _fld, _attr, _extra1, _extra2, _n, ...) \
+ __UVERBS_ATTR##_n(_id, _type, _fld, _attr, _extra1, _extra2)
+
+#define UVERBS_ATTR_TYPE(_type) \
+ .min_len = sizeof(_type), .len = sizeof(_type)
+#define UVERBS_ATTR_STRUCT(_type, _last) \
+ .min_len = ((uintptr_t)(&((_type *)0)->_last + 1)), .len = sizeof(_type)
+#define UVERBS_ATTR_SIZE(_min_len, _len) \
+ .min_len = _min_len, .len = _len
+
/*
* In new compiler, UVERBS_ATTR could be simplified by declaring it as
* [_id] = {.type = _type, .len = _len, ##__VA_ARGS__}
* But since we support older compilers too, we need the more complex code.
*/
-#define UVERBS_ATTR(_id, _len, _type, ...) \
- __UVERBS_ATTR(_id, _len, _type, ##__VA_ARGS__, 1, 0)
+#define UVERBS_ATTR(_id, _type, _fld, _attr, ...) \
+ __UVERBS_ATTR(_id, _type, _fld, _attr, ##__VA_ARGS__, 2, 1, 0)
#define UVERBS_ATTR_PTR_IN_SZ(_id, _len, ...) \
- UVERBS_ATTR(_id, _len, UVERBS_ATTR_TYPE_PTR_IN, ##__VA_ARGS__)
+ UVERBS_ATTR(_id, UVERBS_ATTR_TYPE_PTR_IN, ptr, _len, ##__VA_ARGS__)
/* If sizeof(_type) <= sizeof(u64), this will be inlined rather than a pointer */
#define UVERBS_ATTR_PTR_IN(_id, _type, ...) \
- UVERBS_ATTR_PTR_IN_SZ(_id, sizeof(_type), ##__VA_ARGS__)
+ UVERBS_ATTR_PTR_IN_SZ(_id, _type, ##__VA_ARGS__)
#define UVERBS_ATTR_PTR_OUT_SZ(_id, _len, ...) \
- UVERBS_ATTR(_id, _len, UVERBS_ATTR_TYPE_PTR_OUT, ##__VA_ARGS__)
+ UVERBS_ATTR(_id, UVERBS_ATTR_TYPE_PTR_OUT, ptr, _len, ##__VA_ARGS__)
#define UVERBS_ATTR_PTR_OUT(_id, _type, ...) \
- UVERBS_ATTR_PTR_OUT_SZ(_id, sizeof(_type), ##__VA_ARGS__)
+ UVERBS_ATTR_PTR_OUT_SZ(_id, _type, ##__VA_ARGS__)
+#define UVERBS_ATTR_ENUM_IN(_id, _enum_arr, ...) \
+ UVERBS_ATTR(_id, UVERBS_ATTR_TYPE_ENUM_IN, enum_def, \
+ .ids = (_enum_arr), \
+ .num_elems = ARRAY_SIZE(_enum_arr), ##__VA_ARGS__)
/*
* In new compiler, UVERBS_ATTR_IDR (and FD) could be simplified by declaring
#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)
#define DECLARE_UVERBS_ATTR_SPEC(_name, ...) \
const struct uverbs_attr_def _name = __VA_ARGS__
+#define DECLARE_UVERBS_ENUM(_name, ...) \
+ const struct uverbs_enum_spec _name = { \
+ .len = ARRAY_SIZE(((struct uverbs_attr_spec[]){__VA_ARGS__})),\
+ .ids = {__VA_ARGS__}, \
+ }
#define _UVERBS_METHOD_ATTRS_SZ(...) \
(sizeof((const struct uverbs_attr_def * const []){__VA_ARGS__}) /\
sizeof(const struct uverbs_attr_def *))
u16 len;
/* Combination of bits from enum UVERBS_ATTR_F_XXXX */
u16 flags;
+ u8 enum_id;
};
struct uverbs_obj_attr {
idx & ~UVERBS_ID_NS_MASK);
}
+#define IS_UVERBS_COPY_ERR(_ret) ((_ret) && (_ret) != -ENOENT)
+
static inline const struct uverbs_attr *uverbs_attr_get(const struct uverbs_attr_bundle *attrs_bundle,
u16 idx)
{
return &attrs_bundle->hash[idx_bucket].attrs[idx & ~UVERBS_ID_NS_MASK];
}
+static inline int uverbs_attr_get_enum_id(const struct uverbs_attr_bundle *attrs_bundle,
+ u16 idx)
+{
+ const struct uverbs_attr *attr = uverbs_attr_get(attrs_bundle, idx);
+
+ if (IS_ERR(attr))
+ return PTR_ERR(attr);
+
+ return attr->ptr_attr.enum_id;
+}
+
+static inline void *uverbs_attr_get_obj(const struct uverbs_attr_bundle *attrs_bundle,
+ u16 idx)
+{
+ struct ib_uobject *uobj =
+ uverbs_attr_get(attrs_bundle, idx)->obj_attr.uobject;
+
+ if (IS_ERR(uobj))
+ return uobj;
+
+ return uobj->object;
+}
+
static inline int uverbs_copy_to(const struct uverbs_attr_bundle *attrs_bundle,
size_t idx, const void *from, size_t size)
{
/*
* Validation ensures attr->ptr_attr.len >= size. If the caller is
- * using UVERBS_ATTR_SPEC_F_MIN_SZ then it must call copy_from with
- * the right size.
+ * using UVERBS_ATTR_SPEC_F_MIN_SZ_OR_ZERO then it must call
+ * uverbs_copy_from_or_zero.
*/
if (unlikely(size < attr->ptr_attr.len))
return -EINVAL;
return 0;
}
+static inline int _uverbs_copy_from_or_zero(void *to,
+ const struct uverbs_attr_bundle *attrs_bundle,
+ size_t idx,
+ size_t size)
+{
+ const struct uverbs_attr *attr = uverbs_attr_get(attrs_bundle, idx);
+ size_t min_size;
+
+ if (IS_ERR(attr))
+ return PTR_ERR(attr);
+
+ min_size = min_t(size_t, size, attr->ptr_attr.len);
+
+ if (uverbs_attr_ptr_is_inline(attr))
+ memcpy(to, &attr->ptr_attr.data, min_size);
+ else if (copy_from_user(to, u64_to_user_ptr(attr->ptr_attr.data),
+ min_size))
+ return -EFAULT;
+
+ if (size > min_size)
+ memset(to + min_size, 0, size - min_size);
+
+ return 0;
+}
+
#define uverbs_copy_from(to, attrs_bundle, idx) \
_uverbs_copy_from(to, attrs_bundle, idx, sizeof(*to))
+#define uverbs_copy_from_or_zero(to, attrs_bundle, idx) \
+ _uverbs_copy_from_or_zero(to, attrs_bundle, idx, sizeof(*to))
+
/* =================================================
* Definitions -> Specs infrastructure
* =================================================
projects / linux-2.6-block.git / blobdiff