增加fs统计说明文档
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docs/fs统计说明.md
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docs/fs统计说明.md
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### fs统计说明
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* intcp_stm
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* 已经拦截发送给tfe的流
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* byp_stm
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* bypass的流,包括以下两种
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* byp_policy
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* 因为策略bypass的流
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* byp_stm_err
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* 因为以下各种异常bypass的流
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* e_asym_route
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* 单向流
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* e_no_syn
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* 没有syn
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* e_no_s/a
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* 没有syn/ack
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* e_no_data
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* 没有数据包
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* e_unspt_pro
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* 协议不支持
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* e_ip_hdr
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* ip头错误
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* e_exc_mtu
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* 超过mtu
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* e_invaid_act
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* 策略动作不合法
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* 对应通联 e_internal_1
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* e_tfe_tx
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* 发送给tfe失败
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* 对应通联 e_internal_2
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* e_tup2stm_add
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* 添加hash表失败
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* 对应通联 e_internal_3
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* e_no_tfe
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* 没有可用的tfe
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* 对应通联 e_internal_4
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* e_pme_init
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* 初始化pme失败
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* 对应通联 e_internal_5
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* e_dup_tfc
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* 因为有重复流量,处置动作bypass
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* 对应通联 e_internal_6
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* e_cmsg_add
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* 添加cmsg头失败
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* 对应通联 e_internal_7
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* intcp_stm
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* 发送给tfe的流,有以下几个统计维度
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* ipv4_stm + ipv6_stm
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* http_stm + ssl_stm
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* dup_tfc_stm + 非dup
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* intcp_rdy_stm
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* 可拦截流,能走到maat扫描的流
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* intcp_rdy_B
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* 可拦截字节数
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* pme_new / pme_free
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* 申请/释放了多少个流上下文
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* bloom_hit
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* hit表示识别出了重复包
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* 统计之间关系
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* intcp_stm = ipv4_stm + ipv6_stm = ssl_stm + http_stm
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* byp_stm = byp_policy + byp_stm_err
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* byp_stm_err = e_asym_route + e_no_syn + .... +e_cmsg_add
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* pme_new = byp_stm + intcp_stm
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* pme_new - pme_free = 当前未释放的流
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* ip2pme_add_S - id2pme_del_S = id2pme表当前的元素
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* tuple2stm_add_S - tuple2stm_del_S = tuple2stm表当前的元素
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