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16ae53d80c
Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct dp_meter. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Pravin B Shelar <pshelar@ovn.org> Cc: dev@openvswitch.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Link: https://lore.kernel.org/r/20230922172858.3822653-12-keescook@chromium.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2017 Nicira, Inc.
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*/
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#ifndef METER_H
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#define METER_H 1
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/netlink.h>
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#include <linux/openvswitch.h>
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#include <linux/genetlink.h>
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#include <linux/skbuff.h>
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#include <linux/bits.h>
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#include "flow.h"
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struct datapath;
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#define DP_MAX_BANDS 1
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#define DP_METER_ARRAY_SIZE_MIN BIT_ULL(10)
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#define DP_METER_NUM_MAX (200000UL)
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struct dp_meter_band {
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u32 type;
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u32 rate;
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u32 burst_size;
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u64 bucket; /* 1/1000 packets, or in bits */
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struct ovs_flow_stats stats;
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};
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struct dp_meter {
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spinlock_t lock; /* Per meter lock */
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struct rcu_head rcu;
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u32 id;
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u16 kbps:1, keep_stats:1;
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u16 n_bands;
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u32 max_delta_t;
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u64 used;
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struct ovs_flow_stats stats;
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struct dp_meter_band bands[] __counted_by(n_bands);
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};
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struct dp_meter_instance {
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struct rcu_head rcu;
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u32 n_meters;
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struct dp_meter __rcu *dp_meters[] __counted_by(n_meters);
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};
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struct dp_meter_table {
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struct dp_meter_instance __rcu *ti;
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u32 count;
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u32 max_meters_allowed;
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};
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extern struct genl_family dp_meter_genl_family;
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int ovs_meters_init(struct datapath *dp);
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void ovs_meters_exit(struct datapath *dp);
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bool ovs_meter_execute(struct datapath *dp, struct sk_buff *skb,
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struct sw_flow_key *key, u32 meter_id);
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#endif /* meter.h */
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