#ifndef _FA_NODE_H_ #define _FA_NODE_H_ #include <stddef.h> #include <vppinfra/bihash_40_8.h> #define TCP_FLAG_FIN 0x01 #define TCP_FLAG_SYN 0x02 #define TCP_FLAG_RST 0x04 #define TCP_FLAG_PUSH 0x08 #define TCP_FLAG_ACK 0x10 #define TCP_FLAG_URG 0x20 #define TCP_FLAG_ECE 0x40 #define TCP_FLAG_CWR 0x80 #define TCP_FLAGS_RSTFINACKSYN (TCP_FLAG_RST + TCP_FLAG_FIN + TCP_FLAG_SYN + TCP_FLAG_ACK) #define TCP_FLAGS_ACKSYN (TCP_FLAG_SYN + TCP_FLAG_ACK) #define ACL_FA_CONN_TABLE_DEFAULT_HASH_NUM_BUCKETS (64 * 1024) #define ACL_FA_CONN_TABLE_DEFAULT_HASH_MEMORY_SIZE (1<<30) #define ACL_FA_CONN_TABLE_DEFAULT_MAX_ENTRIES 1000000 typedef union { u64 as_u64; struct { u32 sw_if_index; u16 mask_type_index_lsb; u8 tcp_flags; u8 tcp_flags_valid:1; u8 is_input:1; u8 l4_valid:1; u8 is_nonfirst_fragment:1; u8 is_ip6:1; u8 flags_reserved:3; }; } fa_packet_info_t; typedef union { u64 as_u64; struct { u16 port[2]; u16 proto; u16 lsb_of_sw_if_index; }; } fa_session_l4_key_t; typedef union { struct { ip46_address_t addr[2]; fa_session_l4_key_t l4; /* This field should align with u64 value in bihash_40_8 keyvalue struct */ fa_packet_info_t pkt; }; clib_bihash_kv_40_8_t kv; } fa_5tuple_t; typedef struct { fa_5tuple_t info; /* (5+1)*8 = 48 bytes */ u64 last_active_time; /* +8 bytes = 56 */ u32 sw_if_index; /* +4 bytes = 60 */ union { u8 as_u8[2]; u16 as_u16; } tcp_flags_seen; ; /* +2 bytes = 62 */ u16 thread_index; /* +2 bytes = 64 */ u64 link_enqueue_time; /* 8 byte = 8 */ u32 link_prev_idx; /* +4 bytes = 12 */ u32 link_next_idx; /* +4 bytes = 16 */ u8 link_list_id; /* +1 bytes = 17 */ u8 reserved1[7]; /* +7 bytes = 24 */ u64 reserved2[5]; /* +5*8 bytes = 64 */ } fa_session_t; /* This structure is used to fill in the u64 value in the per-sw-if-index hash table */ typedef struct { union { u64 as_u64; struct { u32 session_index; u16 thread_index; u16 reserved0; }; }; } fa_full_session_id_t; /* * A few compile-time constraints on the size and the layout of the union, to ensure * it makes sense both for bihash and for us. */ #define CT_ASSERT_EQUAL(name, x,y) typedef int assert_ ## name ## _compile_time_assertion_failed[((x) == (y))-1] CT_ASSERT_EQUAL(fa_l3_key_size_is_40, offsetof(fa_5tuple_t, pkt), offsetof(clib_bihash_kv_40_8_t, value)); CT_ASSERT_EQUAL(fa_l4_key_t_is_8, sizeof(fa_session_l4_key_t), sizeof(u64)); CT_ASSERT_EQUAL(fa_packet_info_t_is_8, sizeof(fa_packet_info_t), sizeof(u64)); CT_ASSERT_EQUAL(fa_l3_kv_size_is_48, sizeof(fa_5tuple_t), sizeof(clib_bihash_kv_40_8_t)); /* Let's try to fit within two cachelines */ CT_ASSERT_EQUAL(fa_session_t_size_is_128, sizeof(fa_session_t), 128); /* Session ID MUST be the same as u64 */ CT_ASSERT_EQUAL(fa_full_session_id_size_is_64, sizeof(fa_full_session_id_t), sizeof(u64)); #undef CT_ASSERT_EQUAL typedef struct { /* The pool of sessions managed by this worker */ fa_session_t *fa_sessions_pool; /* per-worker ACL_N_TIMEOUTS of conn lists */ u32 *fa_conn_list_head; u32 *fa_conn_list_tail; /* adds and deletes per-worker-per-interface */ u64 *fa_session_dels_by_sw_if_index; u64 *fa_session_adds_by_sw_if_index; /* Vector of expired connections retrieved from lists */ u32 *expired; /* the earliest next expiry time */ u64 next_expiry_time; /* if not zero, look at all the elements until their enqueue timestamp is after below one */ u64 requeue_until_time; /* Current time between the checks */ u64 current_time_wait_interval; /* Counter of how many sessions we did delete */ u64 cnt_deleted_sessions; /* Counter of already deleted sessions being deleted - should not increment unless a bug */ u64 cnt_already_deleted_sessions; /* Number of times we requeued a session to a head of the list */ u64 cnt_session_timer_restarted; /* swipe up to this enqueue time, rather than following the timeouts */ u64 swipe_end_time; /* bitmap of sw_if_index serviced by this worker */ uword *serviced_sw_if_index_bitmap; /* bitmap of sw_if_indices to clear. set by main thread, cleared by worker */ uword *pending_clear_sw_if_index_bitmap; /* atomic, indicates that the swipe-deletion of connections is in progress */ u32 clear_in_process; /* Interrupt is pending from main thread */ int interrupt_is_pending; /* * Interrupt node on the worker thread sets this if it knows there is * more work to do, but it has to finish to avoid hogging the * core for too long. */ int interrupt_is_needed; /* * Set to indicate that the interrupt node wants to get less interrupts * because there is not enough work for the current rate. */ int interrupt_is_unwanted; /* * Set to copy of a "generation" counter in main thread so we can sync the interrupts. */ int interrupt_generation; } acl_fa_per_worker_data_t; typedef enum { ACL_FA_ERROR_DROP, ACL_FA_N_NEXT, } acl_fa_next_t; enum { ACL_FA_CLEANER_RESCHEDULE = 1, ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX, } acl_fa_cleaner_process_event_e; void acl_fa_enable_disable(u32 sw_if_index, int is_input, int enable_disable); void show_fa_sessions_hash(vlib_main_t * vm, u32 verbose); #endif