diff options
Diffstat (limited to 'drivers/infiniband/core/uverbs_std_types_flow_action.c')
| -rw-r--r-- | drivers/infiniband/core/uverbs_std_types_flow_action.c | 389 |
1 files changed, 3 insertions, 386 deletions
diff --git a/drivers/infiniband/core/uverbs_std_types_flow_action.c b/drivers/infiniband/core/uverbs_std_types_flow_action.c index 459cf165b231..0ddcf6da66c4 100644 --- a/drivers/infiniband/core/uverbs_std_types_flow_action.c +++ b/drivers/infiniband/core/uverbs_std_types_flow_action.c @@ -39,394 +39,13 @@ static int uverbs_free_flow_action(struct ib_uobject *uobject, struct uverbs_attr_bundle *attrs) { struct ib_flow_action *action = uobject->object; - int ret; - ret = ib_destroy_usecnt(&action->usecnt, why, uobject); - if (ret) - return ret; + if (atomic_read(&action->usecnt)) + return -EBUSY; return action->device->ops.destroy_flow_action(action); } -static u64 esp_flags_uverbs_to_verbs(struct uverbs_attr_bundle *attrs, - u32 flags, bool is_modify) -{ - u64 verbs_flags = flags; - - if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_FLOW_ACTION_ESP_ESN)) - verbs_flags |= IB_FLOW_ACTION_ESP_FLAGS_ESN_TRIGGERED; - - if (is_modify && uverbs_attr_is_valid(attrs, - UVERBS_ATTR_FLOW_ACTION_ESP_ATTRS)) - verbs_flags |= IB_FLOW_ACTION_ESP_FLAGS_MOD_ESP_ATTRS; - - return verbs_flags; -}; - -static int validate_flow_action_esp_keymat_aes_gcm(struct ib_flow_action_attrs_esp_keymats *keymat) -{ - struct ib_uverbs_flow_action_esp_keymat_aes_gcm *aes_gcm = - &keymat->keymat.aes_gcm; - - if (aes_gcm->iv_algo > IB_UVERBS_FLOW_ACTION_IV_ALGO_SEQ) - return -EOPNOTSUPP; - - if (aes_gcm->key_len != 32 && - aes_gcm->key_len != 24 && - aes_gcm->key_len != 16) - return -EINVAL; - - if (aes_gcm->icv_len != 16 && - aes_gcm->icv_len != 8 && - aes_gcm->icv_len != 12) - return -EINVAL; - - return 0; -} - -static int (* const flow_action_esp_keymat_validate[])(struct ib_flow_action_attrs_esp_keymats *keymat) = { - [IB_UVERBS_FLOW_ACTION_ESP_KEYMAT_AES_GCM] = validate_flow_action_esp_keymat_aes_gcm, -}; - -static int flow_action_esp_replay_none(struct ib_flow_action_attrs_esp_replays *replay, - bool is_modify) -{ - /* This is used in order to modify an esp flow action with an enabled - * replay protection to a disabled one. This is only supported via - * modify, as in create verb we can simply drop the REPLAY attribute and - * achieve the same thing. - */ - return is_modify ? 0 : -EINVAL; -} - -static int flow_action_esp_replay_def_ok(struct ib_flow_action_attrs_esp_replays *replay, - bool is_modify) -{ - /* Some replay protections could always be enabled without validating - * anything. - */ - return 0; -} - -static int (* const flow_action_esp_replay_validate[])(struct ib_flow_action_attrs_esp_replays *replay, - bool is_modify) = { - [IB_UVERBS_FLOW_ACTION_ESP_REPLAY_NONE] = flow_action_esp_replay_none, - [IB_UVERBS_FLOW_ACTION_ESP_REPLAY_BMP] = flow_action_esp_replay_def_ok, -}; - -static int parse_esp_ip(enum ib_flow_spec_type proto, - const void __user *val_ptr, - size_t len, union ib_flow_spec *out) -{ - int ret; - const struct ib_uverbs_flow_ipv4_filter ipv4 = { - .src_ip = cpu_to_be32(0xffffffffUL), - .dst_ip = cpu_to_be32(0xffffffffUL), - .proto = 0xff, - .tos = 0xff, - .ttl = 0xff, - .flags = 0xff, - }; - const struct ib_uverbs_flow_ipv6_filter ipv6 = { - .src_ip = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, - .dst_ip = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, - .flow_label = cpu_to_be32(0xffffffffUL), - .next_hdr = 0xff, - .traffic_class = 0xff, - .hop_limit = 0xff, - }; - union { - struct ib_uverbs_flow_ipv4_filter ipv4; - struct ib_uverbs_flow_ipv6_filter ipv6; - } user_val = {}; - const void *user_pmask; - size_t val_len; - - /* If the flow IPv4/IPv6 flow specifications are extended, the mask - * should be changed as well. - */ - BUILD_BUG_ON(offsetof(struct ib_uverbs_flow_ipv4_filter, flags) + - sizeof(ipv4.flags) != sizeof(ipv4)); - BUILD_BUG_ON(offsetof(struct ib_uverbs_flow_ipv6_filter, reserved) + - sizeof(ipv6.reserved) != sizeof(ipv6)); - - switch (proto) { - case IB_FLOW_SPEC_IPV4: - if (len > sizeof(user_val.ipv4) && - !ib_is_buffer_cleared(val_ptr + sizeof(user_val.ipv4), - len - sizeof(user_val.ipv4))) - return -EOPNOTSUPP; - - val_len = min_t(size_t, len, sizeof(user_val.ipv4)); - ret = copy_from_user(&user_val.ipv4, val_ptr, - val_len); - if (ret) - return -EFAULT; - - user_pmask = &ipv4; - break; - case IB_FLOW_SPEC_IPV6: - if (len > sizeof(user_val.ipv6) && - !ib_is_buffer_cleared(val_ptr + sizeof(user_val.ipv6), - len - sizeof(user_val.ipv6))) - return -EOPNOTSUPP; - - val_len = min_t(size_t, len, sizeof(user_val.ipv6)); - ret = copy_from_user(&user_val.ipv6, val_ptr, - val_len); - if (ret) - return -EFAULT; - - user_pmask = &ipv6; - break; - default: - return -EOPNOTSUPP; - } - - return ib_uverbs_kern_spec_to_ib_spec_filter(proto, user_pmask, - &user_val, - val_len, out); -} - -static int flow_action_esp_get_encap(struct ib_flow_spec_list *out, - struct uverbs_attr_bundle *attrs) -{ - struct ib_uverbs_flow_action_esp_encap uverbs_encap; - int ret; - - ret = uverbs_copy_from(&uverbs_encap, attrs, - UVERBS_ATTR_FLOW_ACTION_ESP_ENCAP); - if (ret) - return ret; - - /* We currently support only one encap */ - if (uverbs_encap.next_ptr) - return -EOPNOTSUPP; - - if (uverbs_encap.type != IB_FLOW_SPEC_IPV4 && - uverbs_encap.type != IB_FLOW_SPEC_IPV6) - return -EOPNOTSUPP; - - return parse_esp_ip(uverbs_encap.type, - u64_to_user_ptr(uverbs_encap.val_ptr), - uverbs_encap.len, - &out->spec); -} - -struct ib_flow_action_esp_attr { - struct ib_flow_action_attrs_esp hdr; - struct ib_flow_action_attrs_esp_keymats keymat; - struct ib_flow_action_attrs_esp_replays replay; - /* We currently support only one spec */ - struct ib_flow_spec_list encap; -}; - -#define ESP_LAST_SUPPORTED_FLAG IB_UVERBS_FLOW_ACTION_ESP_FLAGS_ESN_NEW_WINDOW -static int parse_flow_action_esp(struct ib_device *ib_dev, - struct uverbs_attr_bundle *attrs, - struct ib_flow_action_esp_attr *esp_attr, - bool is_modify) -{ - struct ib_uverbs_flow_action_esp uverbs_esp = {}; - int ret; - - /* Optional param, if it doesn't exist, we get -ENOENT and skip it */ - ret = uverbs_copy_from(&esp_attr->hdr.esn, attrs, - UVERBS_ATTR_FLOW_ACTION_ESP_ESN); - if (IS_UVERBS_COPY_ERR(ret)) - return ret; - - /* This can be called from FLOW_ACTION_ESP_MODIFY where - * UVERBS_ATTR_FLOW_ACTION_ESP_ATTRS is optional - */ - if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_FLOW_ACTION_ESP_ATTRS)) { - ret = uverbs_copy_from_or_zero(&uverbs_esp, attrs, - UVERBS_ATTR_FLOW_ACTION_ESP_ATTRS); - if (ret) - return ret; - - if (uverbs_esp.flags & ~((ESP_LAST_SUPPORTED_FLAG << 1) - 1)) - return -EOPNOTSUPP; - - esp_attr->hdr.spi = uverbs_esp.spi; - esp_attr->hdr.seq = uverbs_esp.seq; - esp_attr->hdr.tfc_pad = uverbs_esp.tfc_pad; - esp_attr->hdr.hard_limit_pkts = uverbs_esp.hard_limit_pkts; - } - esp_attr->hdr.flags = esp_flags_uverbs_to_verbs(attrs, uverbs_esp.flags, - is_modify); - - if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_FLOW_ACTION_ESP_KEYMAT)) { - esp_attr->keymat.protocol = - uverbs_attr_get_enum_id(attrs, - UVERBS_ATTR_FLOW_ACTION_ESP_KEYMAT); - ret = uverbs_copy_from_or_zero(&esp_attr->keymat.keymat, - attrs, - UVERBS_ATTR_FLOW_ACTION_ESP_KEYMAT); - if (ret) - return ret; - - ret = flow_action_esp_keymat_validate[esp_attr->keymat.protocol](&esp_attr->keymat); - if (ret) - return ret; - - esp_attr->hdr.keymat = &esp_attr->keymat; - } - - if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_FLOW_ACTION_ESP_REPLAY)) { - esp_attr->replay.protocol = - uverbs_attr_get_enum_id(attrs, - UVERBS_ATTR_FLOW_ACTION_ESP_REPLAY); - - ret = uverbs_copy_from_or_zero(&esp_attr->replay.replay, - attrs, - UVERBS_ATTR_FLOW_ACTION_ESP_REPLAY); - if (ret) - return ret; - - ret = flow_action_esp_replay_validate[esp_attr->replay.protocol](&esp_attr->replay, - is_modify); - if (ret) - return ret; - - esp_attr->hdr.replay = &esp_attr->replay; - } - - if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_FLOW_ACTION_ESP_ENCAP)) { - ret = flow_action_esp_get_encap(&esp_attr->encap, attrs); - if (ret) - return ret; - - esp_attr->hdr.encap = &esp_attr->encap; - } - - return 0; -} - -static int UVERBS_HANDLER(UVERBS_METHOD_FLOW_ACTION_ESP_CREATE)( - struct uverbs_attr_bundle *attrs) -{ - struct ib_uobject *uobj = uverbs_attr_get_uobject( - attrs, UVERBS_ATTR_CREATE_FLOW_ACTION_ESP_HANDLE); - struct ib_device *ib_dev = attrs->context->device; - int ret; - struct ib_flow_action *action; - struct ib_flow_action_esp_attr esp_attr = {}; - - if (!ib_dev->ops.create_flow_action_esp) - return -EOPNOTSUPP; - - ret = parse_flow_action_esp(ib_dev, attrs, &esp_attr, false); - if (ret) - return ret; - - /* No need to check as this attribute is marked as MANDATORY */ - action = ib_dev->ops.create_flow_action_esp(ib_dev, &esp_attr.hdr, - attrs); - if (IS_ERR(action)) - return PTR_ERR(action); - - uverbs_flow_action_fill_action(action, uobj, ib_dev, - IB_FLOW_ACTION_ESP); - - return 0; -} - -static int UVERBS_HANDLER(UVERBS_METHOD_FLOW_ACTION_ESP_MODIFY)( - struct uverbs_attr_bundle *attrs) -{ - struct ib_uobject *uobj = uverbs_attr_get_uobject( - attrs, UVERBS_ATTR_MODIFY_FLOW_ACTION_ESP_HANDLE); - struct ib_flow_action *action = uobj->object; - int ret; - struct ib_flow_action_esp_attr esp_attr = {}; - - if (!action->device->ops.modify_flow_action_esp) - return -EOPNOTSUPP; - - ret = parse_flow_action_esp(action->device, attrs, &esp_attr, true); - if (ret) - return ret; - - if (action->type != IB_FLOW_ACTION_ESP) - return -EINVAL; - - return action->device->ops.modify_flow_action_esp(action, - &esp_attr.hdr, - attrs); -} - -static const struct uverbs_attr_spec uverbs_flow_action_esp_keymat[] = { - [IB_UVERBS_FLOW_ACTION_ESP_KEYMAT_AES_GCM] = { - .type = UVERBS_ATTR_TYPE_PTR_IN, - UVERBS_ATTR_STRUCT( - struct ib_uverbs_flow_action_esp_keymat_aes_gcm, - aes_key), - }, -}; - -static const struct uverbs_attr_spec uverbs_flow_action_esp_replay[] = { - [IB_UVERBS_FLOW_ACTION_ESP_REPLAY_NONE] = { - .type = UVERBS_ATTR_TYPE_PTR_IN, - UVERBS_ATTR_NO_DATA(), - }, - [IB_UVERBS_FLOW_ACTION_ESP_REPLAY_BMP] = { - .type = UVERBS_ATTR_TYPE_PTR_IN, - UVERBS_ATTR_STRUCT(struct ib_uverbs_flow_action_esp_replay_bmp, - size), - }, -}; - -DECLARE_UVERBS_NAMED_METHOD( - UVERBS_METHOD_FLOW_ACTION_ESP_CREATE, - UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_FLOW_ACTION_ESP_HANDLE, - UVERBS_OBJECT_FLOW_ACTION, - UVERBS_ACCESS_NEW, - UA_MANDATORY), - UVERBS_ATTR_PTR_IN(UVERBS_ATTR_FLOW_ACTION_ESP_ATTRS, - UVERBS_ATTR_STRUCT(struct ib_uverbs_flow_action_esp, - hard_limit_pkts), - UA_MANDATORY), - UVERBS_ATTR_PTR_IN(UVERBS_ATTR_FLOW_ACTION_ESP_ESN, - UVERBS_ATTR_TYPE(__u32), - UA_OPTIONAL), - UVERBS_ATTR_ENUM_IN(UVERBS_ATTR_FLOW_ACTION_ESP_KEYMAT, - uverbs_flow_action_esp_keymat, - UA_MANDATORY), - UVERBS_ATTR_ENUM_IN(UVERBS_ATTR_FLOW_ACTION_ESP_REPLAY, - uverbs_flow_action_esp_replay, - UA_OPTIONAL), - UVERBS_ATTR_PTR_IN( - UVERBS_ATTR_FLOW_ACTION_ESP_ENCAP, - UVERBS_ATTR_TYPE(struct ib_uverbs_flow_action_esp_encap), - UA_OPTIONAL)); - -DECLARE_UVERBS_NAMED_METHOD( - UVERBS_METHOD_FLOW_ACTION_ESP_MODIFY, - UVERBS_ATTR_IDR(UVERBS_ATTR_MODIFY_FLOW_ACTION_ESP_HANDLE, - UVERBS_OBJECT_FLOW_ACTION, - UVERBS_ACCESS_WRITE, - UA_MANDATORY), - UVERBS_ATTR_PTR_IN(UVERBS_ATTR_FLOW_ACTION_ESP_ATTRS, - UVERBS_ATTR_STRUCT(struct ib_uverbs_flow_action_esp, - hard_limit_pkts), - UA_OPTIONAL), - UVERBS_ATTR_PTR_IN(UVERBS_ATTR_FLOW_ACTION_ESP_ESN, - UVERBS_ATTR_TYPE(__u32), - UA_OPTIONAL), - UVERBS_ATTR_ENUM_IN(UVERBS_ATTR_FLOW_ACTION_ESP_KEYMAT, - uverbs_flow_action_esp_keymat, - UA_OPTIONAL), - UVERBS_ATTR_ENUM_IN(UVERBS_ATTR_FLOW_ACTION_ESP_REPLAY, - uverbs_flow_action_esp_replay, - UA_OPTIONAL), - UVERBS_ATTR_PTR_IN( - UVERBS_ATTR_FLOW_ACTION_ESP_ENCAP, - UVERBS_ATTR_TYPE(struct ib_uverbs_flow_action_esp_encap), - UA_OPTIONAL)); - DECLARE_UVERBS_NAMED_METHOD_DESTROY( UVERBS_METHOD_FLOW_ACTION_DESTROY, UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_FLOW_ACTION_HANDLE, @@ -437,9 +56,7 @@ DECLARE_UVERBS_NAMED_METHOD_DESTROY( DECLARE_UVERBS_NAMED_OBJECT( UVERBS_OBJECT_FLOW_ACTION, UVERBS_TYPE_ALLOC_IDR(uverbs_free_flow_action), - &UVERBS_METHOD(UVERBS_METHOD_FLOW_ACTION_ESP_CREATE), - &UVERBS_METHOD(UVERBS_METHOD_FLOW_ACTION_DESTROY), - &UVERBS_METHOD(UVERBS_METHOD_FLOW_ACTION_ESP_MODIFY)); + &UVERBS_METHOD(UVERBS_METHOD_FLOW_ACTION_DESTROY)); const struct uapi_definition uverbs_def_obj_flow_action[] = { UAPI_DEF_CHAIN_OBJ_TREE_NAMED( |