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The introduction of IPPROTO_SMC enables eBPF programs to determine whether to use SMC based on the context of socket creation, such as network namespaces, PID and comm name, etc. As a subsequent enhancement, to introduce a new generic hook that allows decisions on whether to use SMC or not at runtime, including but not limited to local/remote IP address or ports. User can write their own implememtion via bpf_struct_ops now to choose whether to use SMC or not before TCP 3rd handshake to be comleted. Signed-off-by: D. Wythe <alibuda@linux.alibaba.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Reviewed-by: Dust Li <dust.li@linux.alibaba.com> Link: https://patch.msgid.link/20251107035632.115950-3-alibuda@linux.alibaba.com
34 lines
907 B
C
34 lines
907 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __NETNS_SMC_H__
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#define __NETNS_SMC_H__
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#include <linux/mutex.h>
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#include <linux/percpu.h>
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struct smc_stats_rsn;
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struct smc_stats;
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struct netns_smc {
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/* per cpu counters for SMC */
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struct smc_stats __percpu *smc_stats;
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/* protect fback_rsn */
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struct mutex mutex_fback_rsn;
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struct smc_stats_rsn *fback_rsn;
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bool limit_smc_hs; /* constraint on handshake */
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#ifdef CONFIG_SYSCTL
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struct ctl_table_header *smc_hdr;
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#endif
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#if IS_ENABLED(CONFIG_SMC_HS_CTRL_BPF)
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struct smc_hs_ctrl __rcu *hs_ctrl;
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#endif /* CONFIG_SMC_HS_CTRL_BPF */
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unsigned int sysctl_autocorking_size;
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unsigned int sysctl_smcr_buf_type;
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int sysctl_smcr_testlink_time;
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int sysctl_wmem;
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int sysctl_rmem;
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int sysctl_max_links_per_lgr;
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int sysctl_max_conns_per_lgr;
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unsigned int sysctl_smcr_max_send_wr;
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unsigned int sysctl_smcr_max_recv_wr;
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};
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#endif
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