diff options
| -rw-r--r-- | drivers/infiniband/core/uverbs_ioctl.c | 25 | ||||
| -rw-r--r-- | include/rdma/uverbs_ioctl.h | 36 |
2 files changed, 59 insertions, 2 deletions
diff --git a/drivers/infiniband/core/uverbs_ioctl.c b/drivers/infiniband/core/uverbs_ioctl.c index 6759d59a4421..5ac2950978d2 100644 --- a/drivers/infiniband/core/uverbs_ioctl.c +++ b/drivers/infiniband/core/uverbs_ioctl.c @@ -114,9 +114,27 @@ static int uverbs_process_attr(struct ib_device *ibdev, uattr->attr_data.reserved) return -EINVAL; - e->ptr_attr.data = uattr->data; e->ptr_attr.len = uattr->len; e->ptr_attr.flags = uattr->flags; + + if (val_spec->flags & UVERBS_ATTR_SPEC_F_ALLOC_AND_COPY && + !uverbs_attr_ptr_is_inline(e)) { + void *p; + + p = kvmalloc(uattr->len, GFP_KERNEL); + if (!p) + return -ENOMEM; + + e->ptr_attr.ptr = p; + + if (copy_from_user(p, u64_to_user_ptr(uattr->data), + uattr->len)) { + kvfree(p); + return -EFAULT; + } + } else { + e->ptr_attr.data = uattr->data; + } break; case UVERBS_ATTR_TYPE_IDR: @@ -200,6 +218,11 @@ static int uverbs_finalize_attrs(struct uverbs_attr_bundle *attrs_bundle, spec->obj.access, commit); if (!ret) ret = current_ret; + } else if (spec->type == UVERBS_ATTR_TYPE_PTR_IN && + spec->flags & + UVERBS_ATTR_SPEC_F_ALLOC_AND_COPY && + !uverbs_attr_ptr_is_inline(attr)) { + kvfree(attr->ptr_attr.ptr); } } } diff --git a/include/rdma/uverbs_ioctl.h b/include/rdma/uverbs_ioctl.h index bd6bba3a6e04..11cc40ef1cb6 100644 --- a/include/rdma/uverbs_ioctl.h +++ b/include/rdma/uverbs_ioctl.h @@ -65,6 +65,10 @@ enum { UVERBS_ATTR_SPEC_F_MANDATORY = 1U << 0, /* Support extending attributes by length, validate all unknown size == zero */ UVERBS_ATTR_SPEC_F_MIN_SZ_OR_ZERO = 1U << 1, + /* + * Valid only for PTR_IN. Allocate and copy the data inside the parser + */ + UVERBS_ATTR_SPEC_F_ALLOC_AND_COPY = 1U << 2, }; /* Specification of a single attribute inside the ioctl message */ @@ -323,7 +327,14 @@ struct uverbs_object_tree_def { */ struct uverbs_ptr_attr { - u64 data; + /* + * If UVERBS_ATTR_SPEC_F_ALLOC_AND_COPY is set then the 'ptr' is + * used. + */ + union { + void *ptr; + u64 data; + }; u16 len; /* Combination of bits from enum UVERBS_ATTR_F_XXXX */ u16 flags; @@ -431,6 +442,17 @@ static inline struct ib_uobject *uverbs_attr_get_uobject(const struct uverbs_att return attr->obj_attr.uobject; } +static inline int +uverbs_attr_get_len(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.len; +} + static inline int uverbs_copy_to(const struct uverbs_attr_bundle *attrs_bundle, size_t idx, const void *from, size_t size) { @@ -457,6 +479,18 @@ static inline bool uverbs_attr_ptr_is_inline(const struct uverbs_attr *attr) return attr->ptr_attr.len <= sizeof(attr->ptr_attr.data); } +static inline void *uverbs_attr_get_alloced_ptr( + 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 (void *)attr; + + return uverbs_attr_ptr_is_inline(attr) ? (void *)&attr->ptr_attr.data : + attr->ptr_attr.ptr; +} + static inline int _uverbs_copy_from(void *to, const struct uverbs_attr_bundle *attrs_bundle, size_t idx, |