// SPDX-License-Identifier: GPL-2.0-or-later/* * Copyright (c) 2016 Mellanox Technologies. All rights reserved. * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com> */ #include <net/genetlink.h>#include <net/sock.h> #include "devl_internal.h" static const struct genl_multicast_group devlink_nl_mcgrps[] = {	[DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME },}; static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {	[DEVLINK_ATTR_UNSPEC] = { .strict_start_type =		DEVLINK_ATTR_TRAP_POLICER_ID },	[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },	[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },	[DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },	[DEVLINK_ATTR_PORT_TYPE] = NLA_POLICY_RANGE(NLA_U16, DEVLINK_PORT_TYPE_AUTO,						    DEVLINK_PORT_TYPE_IB),	[DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },	[DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },	[DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },	[DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },	[DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },	[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },	[DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },	[DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },	[DEVLINK_ATTR_ESWITCH_MODE] = NLA_POLICY_RANGE(NLA_U16, DEVLINK_ESWITCH_MODE_LEGACY,						       DEVLINK_ESWITCH_MODE_SWITCHDEV),	[DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },	[DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },	[DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },	[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },	[DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},	[DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},	[DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },	[DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },	[DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },	[DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },	[DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },	[DEVLINK_ATTR_REGION_CHUNK_ADDR] = { .type = NLA_U64 },	[DEVLINK_ATTR_REGION_CHUNK_LEN] = { .type = NLA_U64 },	[DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING },	[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 },	[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },	[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },	[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },	[DEVLINK_ATTR_FLASH_UPDATE_OVERWRITE_MASK] =		NLA_POLICY_BITFIELD32(DEVLINK_SUPPORTED_FLASH_OVERWRITE_SECTIONS),	[DEVLINK_ATTR_TRAP_NAME] = { .type = NLA_NUL_STRING },	[DEVLINK_ATTR_TRAP_ACTION] = { .type = NLA_U8 },	[DEVLINK_ATTR_TRAP_GROUP_NAME] = { .type = NLA_NUL_STRING },	[DEVLINK_ATTR_NETNS_PID] = { .type = NLA_U32 },	[DEVLINK_ATTR_NETNS_FD] = { .type = NLA_U32 },	[DEVLINK_ATTR_NETNS_ID] = { .type = NLA_U32 },	[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP] = { .type = NLA_U8 },	[DEVLINK_ATTR_TRAP_POLICER_ID] = { .type = NLA_U32 },	[DEVLINK_ATTR_TRAP_POLICER_RATE] = { .type = NLA_U64 },	[DEVLINK_ATTR_TRAP_POLICER_BURST] = { .type = NLA_U64 },	[DEVLINK_ATTR_PORT_FUNCTION] = { .type = NLA_NESTED },	[DEVLINK_ATTR_RELOAD_ACTION] = NLA_POLICY_RANGE(NLA_U8, DEVLINK_RELOAD_ACTION_DRIVER_REINIT,							DEVLINK_RELOAD_ACTION_MAX),	[DEVLINK_ATTR_RELOAD_LIMITS] = NLA_POLICY_BITFIELD32(DEVLINK_RELOAD_LIMITS_VALID_MASK),	[DEVLINK_ATTR_PORT_FLAVOUR] = { .type = NLA_U16 },	[DEVLINK_ATTR_PORT_PCI_PF_NUMBER] = { .type = NLA_U16 },	[DEVLINK_ATTR_PORT_PCI_SF_NUMBER] = { .type = NLA_U32 },	[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER] = { .type = NLA_U32 },	[DEVLINK_ATTR_RATE_TYPE] = { .type = NLA_U16 },	[DEVLINK_ATTR_RATE_TX_SHARE] = { .type = NLA_U64 },	[DEVLINK_ATTR_RATE_TX_MAX] = { .type = NLA_U64 },	[DEVLINK_ATTR_RATE_NODE_NAME] = { .type = NLA_NUL_STRING },	[DEVLINK_ATTR_RATE_PARENT_NODE_NAME] = { .type = NLA_NUL_STRING },	[DEVLINK_ATTR_LINECARD_INDEX] = { .type = NLA_U32 },	[DEVLINK_ATTR_LINECARD_TYPE] = { .type = NLA_NUL_STRING },	[DEVLINK_ATTR_SELFTESTS] = { .type = NLA_NESTED },	[DEVLINK_ATTR_RATE_TX_PRIORITY] = { .type = NLA_U32 },	[DEVLINK_ATTR_RATE_TX_WEIGHT] = { .type = NLA_U32 },	[DEVLINK_ATTR_REGION_DIRECT] = { .type = NLA_FLAG },}; int devlink_nl_msg_reply_and_new(struct sk_buff **msg, struct genl_info *info){	int err; 	if (*msg) {		err = genlmsg_reply(*msg, info);		if (err)			return err;	}	*msg = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);	if (!*msg)		return -ENOMEM;	return 0;} struct devlink *devlink_get_from_attrs_lock(struct net *net, struct nlattr **attrs){	struct devlink *devlink;	unsigned long index;	char *busname;	char *devname; 	if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME])		return ERR_PTR(-EINVAL); 	busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);	devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]); 	devlinks_xa_for_each_registered_get(net, index, devlink) {		devl_lock(devlink);		if (devl_is_registered(devlink) &&		    strcmp(devlink->dev->bus->name, busname) == 0 &&		    strcmp(dev_name(devlink->dev), devname) == 0)			return devlink;		devl_unlock(devlink);		devlink_put(devlink);	} 	return ERR_PTR(-ENODEV);} static int __devlink_nl_pre_doit(struct sk_buff *skb, struct genl_info *info,				 u8 flags){	struct devlink_port *devlink_port;	struct devlink *devlink;	int err; 	devlink = devlink_get_from_attrs_lock(genl_info_net(info), info->attrs);	if (IS_ERR(devlink))		return PTR_ERR(devlink); 	info->user_ptr[0] = devlink;	if (flags & DEVLINK_NL_FLAG_NEED_PORT) {		devlink_port = devlink_port_get_from_info(devlink, info);		if (IS_ERR(devlink_port)) {			err = PTR_ERR(devlink_port);			goto unlock;		}		info->user_ptr[1] = devlink_port;	} else if (flags & DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT) {		devlink_port = devlink_port_get_from_info(devlink, info);		if (!IS_ERR(devlink_port))			info->user_ptr[1] = devlink_port;	}	return 0; unlock:	devl_unlock(devlink);	devlink_put(devlink);	return err;} int devlink_nl_pre_doit(const struct genl_split_ops *ops,			struct sk_buff *skb, struct genl_info *info){	return __devlink_nl_pre_doit(skb, info, ops->internal_flags);} int devlink_nl_pre_doit_port(const struct genl_split_ops *ops,			     struct sk_buff *skb, struct genl_info *info){	return __devlink_nl_pre_doit(skb, info, DEVLINK_NL_FLAG_NEED_PORT);} int devlink_nl_pre_doit_port_optional(const struct genl_split_ops *ops,				      struct sk_buff *skb,				      struct genl_info *info){	return __devlink_nl_pre_doit(skb, info, DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT);} void devlink_nl_post_doit(const struct genl_split_ops *ops,			  struct sk_buff *skb, struct genl_info *info){	struct devlink *devlink; 	devlink = info->user_ptr[0];	devl_unlock(devlink);	devlink_put(devlink);} static int devlink_nl_inst_single_dumpit(struct sk_buff *msg,					 struct netlink_callback *cb, int flags,					 devlink_nl_dump_one_func_t *dump_one,					 struct nlattr **attrs){	struct devlink *devlink;	int err; 	devlink = devlink_get_from_attrs_lock(sock_net(msg->sk), attrs);	if (IS_ERR(devlink))		return PTR_ERR(devlink);	err = dump_one(msg, devlink, cb, flags | NLM_F_DUMP_FILTERED); 	devl_unlock(devlink);	devlink_put(devlink); 	if (err != -EMSGSIZE)		return err;	return msg->len;} static int devlink_nl_inst_iter_dumpit(struct sk_buff *msg,				       struct netlink_callback *cb, int flags,				       devlink_nl_dump_one_func_t *dump_one){	struct devlink_nl_dump_state *state = devlink_dump_state(cb);	struct devlink *devlink;	int err = 0; 	while ((devlink = devlinks_xa_find_get(sock_net(msg->sk),					       &state->instance))) {		devl_lock(devlink); 		if (devl_is_registered(devlink))			err = dump_one(msg, devlink, cb, flags);		else			err = 0; 		devl_unlock(devlink);		devlink_put(devlink); 		if (err)			break; 		state->instance++; 		/* restart sub-object walk for the next instance */		state->idx = 0;	} 	if (err != -EMSGSIZE)		return err;	return msg->len;} int devlink_nl_dumpit(struct sk_buff *msg, struct netlink_callback *cb,		      devlink_nl_dump_one_func_t *dump_one){	const struct genl_info *info = genl_info_dump(cb);	struct nlattr **attrs = info->attrs;	int flags = NLM_F_MULTI; 	if (attrs &&	    (attrs[DEVLINK_ATTR_BUS_NAME] || attrs[DEVLINK_ATTR_DEV_NAME]))		return devlink_nl_inst_single_dumpit(msg, cb, flags, dump_one,						     attrs);	else		return devlink_nl_inst_iter_dumpit(msg, cb, flags, dump_one);} static const struct genl_small_ops devlink_nl_small_ops[40] = {	{		.cmd = DEVLINK_CMD_PORT_SET,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_port_set_doit,		.flags = GENL_ADMIN_PERM,		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,	},	{		.cmd = DEVLINK_CMD_RATE_SET,		.doit = devlink_nl_cmd_rate_set_doit,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_RATE_NEW,		.doit = devlink_nl_cmd_rate_new_doit,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_RATE_DEL,		.doit = devlink_nl_cmd_rate_del_doit,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_PORT_SPLIT,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_port_split_doit,		.flags = GENL_ADMIN_PERM,		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,	},	{		.cmd = DEVLINK_CMD_PORT_UNSPLIT,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_port_unsplit_doit,		.flags = GENL_ADMIN_PERM,		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,	},	{		.cmd = DEVLINK_CMD_PORT_NEW,		.doit = devlink_nl_cmd_port_new_doit,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_PORT_DEL,		.doit = devlink_nl_cmd_port_del_doit,		.flags = GENL_ADMIN_PERM,		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,	}, 	{		.cmd = DEVLINK_CMD_LINECARD_SET,		.doit = devlink_nl_cmd_linecard_set_doit,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_SB_POOL_SET,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_sb_pool_set_doit,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_SB_PORT_POOL_SET,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_sb_port_pool_set_doit,		.flags = GENL_ADMIN_PERM,		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,	},	{		.cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,		.flags = GENL_ADMIN_PERM,		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,	},	{		.cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_sb_occ_snapshot_doit,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_sb_occ_max_clear_doit,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_ESWITCH_GET,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_eswitch_get_doit,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_ESWITCH_SET,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_eswitch_set_doit,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_DPIPE_TABLE_GET,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_dpipe_table_get,		/* can be retrieved by unprivileged users */	},	{		.cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_dpipe_entries_get,		/* can be retrieved by unprivileged users */	},	{		.cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_dpipe_headers_get,		/* can be retrieved by unprivileged users */	},	{		.cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_dpipe_table_counters_set,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_RESOURCE_SET,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_resource_set,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_RESOURCE_DUMP,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_resource_dump,		/* can be retrieved by unprivileged users */	},	{		.cmd = DEVLINK_CMD_RELOAD,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_reload,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_PARAM_SET,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_param_set_doit,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_PORT_PARAM_GET,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_port_param_get_doit,		.dumpit = devlink_nl_cmd_port_param_get_dumpit,		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,		/* can be retrieved by unprivileged users */	},	{		.cmd = DEVLINK_CMD_PORT_PARAM_SET,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_port_param_set_doit,		.flags = GENL_ADMIN_PERM,		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,	},	{		.cmd = DEVLINK_CMD_REGION_NEW,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_region_new,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_REGION_DEL,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_region_del,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_REGION_READ,		.validate = GENL_DONT_VALIDATE_STRICT |			    GENL_DONT_VALIDATE_DUMP_STRICT,		.dumpit = devlink_nl_cmd_region_read_dumpit,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_health_reporter_set_doit,		.flags = GENL_ADMIN_PERM,		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT,	},	{		.cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_health_reporter_recover_doit,		.flags = GENL_ADMIN_PERM,		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT,	},	{		.cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_health_reporter_diagnose_doit,		.flags = GENL_ADMIN_PERM,		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT,	},	{		.cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,		.validate = GENL_DONT_VALIDATE_STRICT |			    GENL_DONT_VALIDATE_DUMP_STRICT,		.dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_health_reporter_dump_clear_doit,		.flags = GENL_ADMIN_PERM,		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT,	},	{		.cmd = DEVLINK_CMD_HEALTH_REPORTER_TEST,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_health_reporter_test_doit,		.flags = GENL_ADMIN_PERM,		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT,	},	{		.cmd = DEVLINK_CMD_FLASH_UPDATE,		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,		.doit = devlink_nl_cmd_flash_update,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_TRAP_SET,		.doit = devlink_nl_cmd_trap_set_doit,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_TRAP_GROUP_SET,		.doit = devlink_nl_cmd_trap_group_set_doit,		.flags = GENL_ADMIN_PERM,	},	{		.cmd = DEVLINK_CMD_TRAP_POLICER_SET,		.doit = devlink_nl_cmd_trap_policer_set_doit,		.flags = GENL_ADMIN_PERM,	},

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