--- /dev/null
+/*
+ * Copyright (c) 2018, Mellanox Technologies inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "uverbs.h"
+#include <rdma/uverbs_std_types.h>
+
+static int uverbs_free_flow_action(struct ib_uobject *uobject,
+ enum rdma_remove_reason why)
+{
+ struct ib_flow_action *action = uobject->object;
+
+ if (why == RDMA_REMOVE_DESTROY &&
+ atomic_read(&action->usecnt))
+ return -EBUSY;
+
+ return action->device->destroy_flow_action(action);
+}
+
+static u64 esp_flags_uverbs_to_verbs(struct uverbs_attr_bundle *attrs,
+ u32 flags)
+{
+ 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;
+
+ 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 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 ib_uverbs_file *file,
+ struct uverbs_attr_bundle *attrs,
+ struct ib_flow_action_esp_attr *esp_attr)
+{
+ 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);
+
+ 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;
+
+ 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 ib_device *ib_dev,
+ struct ib_uverbs_file *file,
+ struct uverbs_attr_bundle *attrs)
+{
+ int ret;
+ struct ib_uobject *uobj;
+ struct ib_flow_action *action;
+ struct ib_flow_action_esp_attr esp_attr = {};
+
+ if (!ib_dev->create_flow_action_esp)
+ return -EOPNOTSUPP;
+
+ ret = parse_flow_action_esp(ib_dev, file, attrs, &esp_attr);
+ if (ret)
+ return ret;
+
+ /* No need to check as this attribute is marked as MANDATORY */
+ uobj = uverbs_attr_get(attrs, UVERBS_ATTR_FLOW_ACTION_ESP_HANDLE)->obj_attr.uobject;
+ action = ib_dev->create_flow_action_esp(ib_dev, &esp_attr.hdr, attrs);
+ if (IS_ERR(action))
+ return PTR_ERR(action);
+
+ atomic_set(&action->usecnt, 0);
+ action->device = ib_dev;
+ action->type = IB_FLOW_ACTION_ESP;
+ action->uobject = uobj;
+ uobj->object = action;
+
+ return 0;
+}
+
+static const struct uverbs_attr_spec uverbs_flow_action_esp_keymat[] = {
+ [IB_UVERBS_FLOW_ACTION_ESP_KEYMAT_AES_GCM] = {
+ .ptr = {
+ .type = UVERBS_ATTR_TYPE_PTR_IN,
+ UVERBS_ATTR_TYPE(struct ib_uverbs_flow_action_esp_keymat_aes_gcm),
+ .flags = UVERBS_ATTR_SPEC_F_MIN_SZ_OR_ZERO,
+ },
+ },
+};
+
+static const struct uverbs_attr_spec uverbs_flow_action_esp_replay[] = {
+ [IB_UVERBS_FLOW_ACTION_ESP_REPLAY_BMP] = {
+ .ptr = {
+ .type = UVERBS_ATTR_TYPE_PTR_IN,
+ UVERBS_ATTR_STRUCT(struct ib_uverbs_flow_action_esp_replay_bmp, size),
+ .flags = UVERBS_ATTR_SPEC_F_MIN_SZ_OR_ZERO,
+ }
+ },
+};
+
+static DECLARE_UVERBS_NAMED_METHOD(UVERBS_METHOD_FLOW_ACTION_ESP_CREATE,
+ &UVERBS_ATTR_IDR(UVERBS_ATTR_FLOW_ACTION_ESP_HANDLE, UVERBS_OBJECT_FLOW_ACTION,
+ UVERBS_ACCESS_NEW,
+ UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)),
+ &UVERBS_ATTR_PTR_IN(UVERBS_ATTR_FLOW_ACTION_ESP_ATTRS,
+ UVERBS_ATTR_STRUCT(struct ib_uverbs_flow_action_esp, hard_limit_pkts),
+ UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY |
+ UVERBS_ATTR_SPEC_F_MIN_SZ_OR_ZERO)),
+ &UVERBS_ATTR_PTR_IN(UVERBS_ATTR_FLOW_ACTION_ESP_ESN, UVERBS_ATTR_TYPE(__u32)),
+ &UVERBS_ATTR_ENUM_IN(UVERBS_ATTR_FLOW_ACTION_ESP_KEYMAT,
+ uverbs_flow_action_esp_keymat,
+ UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)),
+ &UVERBS_ATTR_ENUM_IN(UVERBS_ATTR_FLOW_ACTION_ESP_REPLAY,
+ uverbs_flow_action_esp_replay),
+ &UVERBS_ATTR_PTR_IN(UVERBS_ATTR_FLOW_ACTION_ESP_ENCAP,
+ UVERBS_ATTR_STRUCT(struct ib_uverbs_flow_action_esp_encap, type)));
+
+static DECLARE_UVERBS_NAMED_METHOD_WITH_HANDLER(UVERBS_METHOD_FLOW_ACTION_DESTROY,
+ uverbs_destroy_def_handler,
+ &UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_FLOW_ACTION_HANDLE,
+ UVERBS_OBJECT_FLOW_ACTION,
+ UVERBS_ACCESS_DESTROY,
+ UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)));
+
+DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_FLOW_ACTION,
+ &UVERBS_TYPE_ALLOC_IDR(0, uverbs_free_flow_action),
+ &UVERBS_METHOD(UVERBS_METHOD_FLOW_ACTION_ESP_CREATE),
+ &UVERBS_METHOD(UVERBS_METHOD_FLOW_ACTION_DESTROY));
+
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