forked from mirrors/linux
6f670d06e4
Clang doesn't have 'stringop-truncation' group like GCC does, and
complains about it when building samples which use xdp_sample_user
infra:
samples/bpf/xdp_sample_user.h:48:32: warning: unknown warning group '-Wstringop-truncation', ignored [-Wunknown-warning-option]
#pragma GCC diagnostic ignored "-Wstringop-truncation"
^
[ repeat ]
Those are harmless, but avoidable when guarding it with ifdef.
I could guard push/pop as well, but this would require one more
ifdef cruft around a single line which I don't think is reasonable.
Fixes: 156f886cf6 ("samples: bpf: Add basic infrastructure for XDP samples")
Signed-off-by: Alexander Lobakin <alexandr.lobakin@intel.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/bpf/20211203195004.5803-3-alexandr.lobakin@intel.com
110 lines
4.4 KiB
C
110 lines
4.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#ifndef XDP_SAMPLE_USER_H
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#define XDP_SAMPLE_USER_H
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#include <bpf/libbpf.h>
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#include <linux/compiler.h>
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#include "xdp_sample_shared.h"
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enum stats_mask {
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_SAMPLE_REDIRECT_MAP = 1U << 0,
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SAMPLE_RX_CNT = 1U << 1,
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SAMPLE_REDIRECT_ERR_CNT = 1U << 2,
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SAMPLE_CPUMAP_ENQUEUE_CNT = 1U << 3,
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SAMPLE_CPUMAP_KTHREAD_CNT = 1U << 4,
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SAMPLE_EXCEPTION_CNT = 1U << 5,
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SAMPLE_DEVMAP_XMIT_CNT = 1U << 6,
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SAMPLE_REDIRECT_CNT = 1U << 7,
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SAMPLE_REDIRECT_MAP_CNT = SAMPLE_REDIRECT_CNT | _SAMPLE_REDIRECT_MAP,
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SAMPLE_REDIRECT_ERR_MAP_CNT = SAMPLE_REDIRECT_ERR_CNT | _SAMPLE_REDIRECT_MAP,
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SAMPLE_DEVMAP_XMIT_CNT_MULTI = 1U << 8,
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SAMPLE_SKIP_HEADING = 1U << 9,
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};
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/* Exit return codes */
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#define EXIT_OK 0
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#define EXIT_FAIL 1
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#define EXIT_FAIL_OPTION 2
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#define EXIT_FAIL_XDP 3
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#define EXIT_FAIL_BPF 4
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#define EXIT_FAIL_MEM 5
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int sample_setup_maps(struct bpf_map **maps);
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int __sample_init(int mask);
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void sample_exit(int status);
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int sample_run(int interval, void (*post_cb)(void *), void *ctx);
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void sample_switch_mode(void);
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int sample_install_xdp(struct bpf_program *xdp_prog, int ifindex, bool generic,
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bool force);
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void sample_usage(char *argv[], const struct option *long_options,
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const char *doc, int mask, bool error);
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const char *get_driver_name(int ifindex);
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int get_mac_addr(int ifindex, void *mac_addr);
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#pragma GCC diagnostic push
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#ifndef __clang__
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#pragma GCC diagnostic ignored "-Wstringop-truncation"
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#endif
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__attribute__((unused))
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static inline char *safe_strncpy(char *dst, const char *src, size_t size)
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{
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if (!size)
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return dst;
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strncpy(dst, src, size - 1);
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dst[size - 1] = '\0';
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return dst;
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}
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#pragma GCC diagnostic pop
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#define __attach_tp(name) \
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({ \
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if (!bpf_program__is_tracing(skel->progs.name)) \
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return -EINVAL; \
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skel->links.name = bpf_program__attach(skel->progs.name); \
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if (!skel->links.name) \
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return -errno; \
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})
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#define sample_init_pre_load(skel) \
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({ \
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skel->rodata->nr_cpus = libbpf_num_possible_cpus(); \
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sample_setup_maps((struct bpf_map *[]){ \
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skel->maps.rx_cnt, skel->maps.redir_err_cnt, \
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skel->maps.cpumap_enqueue_cnt, \
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skel->maps.cpumap_kthread_cnt, \
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skel->maps.exception_cnt, skel->maps.devmap_xmit_cnt, \
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skel->maps.devmap_xmit_cnt_multi }); \
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})
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#define DEFINE_SAMPLE_INIT(name) \
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static int sample_init(struct name *skel, int mask) \
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{ \
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int ret; \
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ret = __sample_init(mask); \
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if (ret < 0) \
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return ret; \
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if (mask & SAMPLE_REDIRECT_MAP_CNT) \
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__attach_tp(tp_xdp_redirect_map); \
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if (mask & SAMPLE_REDIRECT_CNT) \
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__attach_tp(tp_xdp_redirect); \
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if (mask & SAMPLE_REDIRECT_ERR_MAP_CNT) \
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__attach_tp(tp_xdp_redirect_map_err); \
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if (mask & SAMPLE_REDIRECT_ERR_CNT) \
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__attach_tp(tp_xdp_redirect_err); \
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if (mask & SAMPLE_CPUMAP_ENQUEUE_CNT) \
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__attach_tp(tp_xdp_cpumap_enqueue); \
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if (mask & SAMPLE_CPUMAP_KTHREAD_CNT) \
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__attach_tp(tp_xdp_cpumap_kthread); \
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if (mask & SAMPLE_EXCEPTION_CNT) \
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__attach_tp(tp_xdp_exception); \
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if (mask & SAMPLE_DEVMAP_XMIT_CNT) \
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__attach_tp(tp_xdp_devmap_xmit); \
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if (mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI) \
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__attach_tp(tp_xdp_devmap_xmit_multi); \
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return 0; \
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}
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#endif
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