1 files changed, 435 insertions, 0 deletions

diff --git a/drivers/infiniband/core/uverbs_std_types_flow_action.c b/drivers/infiniband/core/uverbs_std_types_flow_action.c
new file mode 100644
index 000000000000..cbcec3da12f6
--- /dev/null
+++ b/drivers/infiniband/core/uverbs_std_types_flow_action.c
@@ -0,0 +1,435 @@
+/*
+ * 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, 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 ib_uverbs_file *file,
+				 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 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, false);
+	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 int UVERBS_HANDLER(UVERBS_METHOD_FLOW_ACTION_ESP_MODIFY)(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->modify_flow_action_esp)
+		return -EOPNOTSUPP;
+
+	ret = parse_flow_action_esp(ib_dev, file, attrs, &esp_attr, true);
+	if (ret)
+		return ret;
+
+	uobj = uverbs_attr_get(attrs, UVERBS_ATTR_FLOW_ACTION_ESP_HANDLE)->obj_attr.uobject;
+	action = uobj->object;
+
+	if (action->type != IB_FLOW_ACTION_ESP)
+		return -EINVAL;
+
+	return ib_dev->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] = {
+		.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_NONE] = {
+		.ptr = {
+			.type = UVERBS_ATTR_TYPE_PTR_IN,
+			/* No need to specify any data */
+			.len = 0,
+		}
+	},
+	[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(UVERBS_METHOD_FLOW_ACTION_ESP_MODIFY,
+	&UVERBS_ATTR_IDR(UVERBS_ATTR_FLOW_ACTION_ESP_HANDLE, UVERBS_OBJECT_FLOW_ACTION,
+			 UVERBS_ACCESS_WRITE,
+			 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_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),
+	&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),
+			    &UVERBS_METHOD(UVERBS_METHOD_FLOW_ACTION_ESP_MODIFY));
+