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Vector Packet Processing
fa_node.h
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1 #ifndef _FA_NODE_H_
2 #define _FA_NODE_H_
3 
4 #include <stddef.h>
5 #include <vppinfra/bihash_16_8.h>
6 #include <vppinfra/bihash_40_8.h>
7 
9 
10 // #define FA_NODE_VERBOSE_DEBUG 3
11 
12 #define TCP_FLAG_FIN 0x01
13 #define TCP_FLAG_SYN 0x02
14 #define TCP_FLAG_RST 0x04
15 #define TCP_FLAG_PUSH 0x08
16 #define TCP_FLAG_ACK 0x10
17 #define TCP_FLAG_URG 0x20
18 #define TCP_FLAG_ECE 0x40
19 #define TCP_FLAG_CWR 0x80
20 #define TCP_FLAGS_RSTFINACKSYN (TCP_FLAG_RST + TCP_FLAG_FIN + TCP_FLAG_SYN + TCP_FLAG_ACK)
21 #define TCP_FLAGS_ACKSYN (TCP_FLAG_SYN + TCP_FLAG_ACK)
22 
23 #define ACL_FA_CONN_TABLE_DEFAULT_HASH_NUM_BUCKETS (64 * 1024)
24 #define ACL_FA_CONN_TABLE_DEFAULT_HASH_MEMORY_SIZE (1ULL<<30)
25 #define ACL_FA_CONN_TABLE_DEFAULT_MAX_ENTRIES 500000
26 
27 typedef union {
29  struct {
33  u8 tcp_flags_valid:1;
34  u8 l4_valid:1;
35  u8 is_nonfirst_fragment:1;
36  u8 is_ip6:1;
37  u8 flags_reserved:4;
38  };
40 
41 typedef union {
43  struct {
44  u16 port[2];
45  union {
46  struct {
48  u8 is_input: 1;
49  u8 is_slowpath: 1;
50  u8 reserved0: 6;
52  };
54  };
55  };
57 
58 typedef union {
59  struct {
60  union {
61  struct {
62  /* we put the IPv4 addresses
63  after padding so we can still
64  use them as (shorter) key together with
65  L4 info */
66  u32 l3_zero_pad[6];
67  ip4_address_t ip4_addr[2];
68  };
69  ip6_address_t ip6_addr[2];
70  };
72  /* This field should align with u64 value in bihash_40_8 and bihash_16_8 keyvalue struct */
74  };
76  struct {
77  u64 padding_for_kv_16_8[3];
79  };
80 } fa_5tuple_t;
81 
82 typedef struct {
83  fa_5tuple_t info; /* (5+1)*8 = 48 bytes */
84  u64 last_active_time; /* +8 bytes = 56 */
85  u32 sw_if_index; /* +4 bytes = 60 */
86  union {
87  u8 as_u8[2];
89  } tcp_flags_seen; ; /* +2 bytes = 62 */
90  u16 thread_index; /* +2 bytes = 64 */
91  u64 link_enqueue_time; /* 8 byte = 8 */
92  u32 link_prev_idx; /* +4 bytes = 12 */
93  u32 link_next_idx; /* +4 bytes = 16 */
94  u8 link_list_id; /* +1 bytes = 17 */
95  u8 deleted; /* +1 bytes = 18 */
96  u8 is_ip6; /* +1 bytes = 19 */
97  u8 reserved1[5]; /* +5 bytes = 24 */
98  u64 reserved2[5]; /* +5*8 bytes = 64 */
99 } fa_session_t;
100 
101 #define FA_POLICY_EPOCH_MASK 0x7fff
102 /* input policy epochs have the MSB set */
103 #define FA_POLICY_EPOCH_IS_INPUT 0x8000
104 
105 
106 /* This structure is used to fill in the u64 value
107  in the per-sw-if-index hash table */
108 typedef struct {
109  union {
111  struct {
115  };
116  };
118 
119 /*
120  * A few compile-time constraints on the size and the layout of the union, to ensure
121  * it makes sense both for bihash and for us.
122  */
123 
124 #define CT_ASSERT_EQUAL(name, x,y) typedef int assert_ ## name ## _compile_time_assertion_failed[((x) == (y))-1]
125 CT_ASSERT_EQUAL(fa_l3_key_size_is_40, offsetof(fa_5tuple_t, pkt), offsetof(clib_bihash_kv_40_8_t, value));
126 CT_ASSERT_EQUAL(fa_ip6_kv_val_at_pkt, offsetof(fa_5tuple_t, pkt), offsetof(fa_5tuple_t, kv_40_8.value));
127 CT_ASSERT_EQUAL(fa_ip4_kv_val_at_pkt, offsetof(fa_5tuple_t, pkt), offsetof(fa_5tuple_t, kv_16_8.value));
128 CT_ASSERT_EQUAL(fa_l4_key_t_is_8, sizeof(fa_session_l4_key_t), sizeof(u64));
129 CT_ASSERT_EQUAL(fa_packet_info_t_is_8, sizeof(fa_packet_info_t), sizeof(u64));
130 CT_ASSERT_EQUAL(fa_l3_kv_size_is_48, sizeof(fa_5tuple_t), sizeof(clib_bihash_kv_40_8_t));
131 CT_ASSERT_EQUAL(fa_ip4_starts_at_kv16_key, offsetof(fa_5tuple_t, ip4_addr), offsetof(fa_5tuple_t, kv_16_8));
132 CT_ASSERT_EQUAL(fa_ip4_and_ip6_kv_value_match, offsetof(fa_5tuple_t, kv_16_8.value), offsetof(fa_5tuple_t, kv_40_8.value));
133 
134 /* Let's try to fit within two cachelines */
135 CT_ASSERT_EQUAL(fa_session_t_size_is_128, sizeof(fa_session_t), 128);
136 
137 /* Session ID MUST be the same as u64 */
138 CT_ASSERT_EQUAL(fa_full_session_id_size_is_64, sizeof(fa_full_session_id_t), sizeof(u64));
139 
140 CT_ASSERT_EQUAL(fa_5tuple_opaque_t_must_match_5tuple, sizeof(fa_5tuple_opaque_t), sizeof(fa_5tuple_t));
141 #undef CT_ASSERT_EQUAL
142 
143 #define FA_SESSION_BOGUS_INDEX ~0
144 
145 typedef struct {
146  /* The pool of sessions managed by this worker */
148  /* per-worker ACL_N_TIMEOUTS of conn lists */
151  /* expiry time set whenever an element is enqueued */
153  /* adds and deletes per-worker-per-interface */
156  /* sessions deleted due to epoch change */
158  /* Vector of expired connections retrieved from lists */
160  /* the earliest next expiry time */
162  /* if not zero, look at all the elements until their enqueue timestamp is after below one */
164  /* Current time between the checks */
166  /* Counter of how many sessions we did delete */
168  /* Counter of already deleted sessions being deleted - should not increment unless a bug */
170  /* Number of times we requeued a session to a head of the list */
172  /* swipe up to this enqueue time, rather than following the timeouts */
174  /* bitmap of sw_if_index serviced by this worker */
176  /* bitmap of sw_if_indices to clear. set by main thread, cleared by worker */
178  /* atomic, indicates that the swipe-deletion of connections is in progress */
180  /* Interrupt is pending from main thread */
182  /*
183  * Interrupt node on the worker thread sets this if it knows there is
184  * more work to do, but it has to finish to avoid hogging the
185  * core for too long.
186  */
188  /*
189  * Set to indicate that the interrupt node wants to get less interrupts
190  * because there is not enough work for the current rate.
191  */
193  /*
194  * Set to copy of a "generation" counter in main thread so we can sync the interrupts.
195  */
198 
199 
200 typedef enum {
203 } acl_fa_next_t;
204 
205 
206 enum
207 {
211 
212 void acl_fa_enable_disable(u32 sw_if_index, int is_input, int enable_disable);
213 
214 void show_fa_sessions_hash(vlib_main_t * vm, u32 verbose);
215 
216 u8 *format_acl_plugin_5tuple (u8 * s, va_list * args);
217 
218 /* use like: elog_acl_maybe_trace_X1(am, "foobar: %d", "i4", int32_value); */
219 
220 #define elog_acl_maybe_trace_X1(am, acl_elog_trace_format_label, acl_elog_trace_format_args, acl_elog_val1) \
221 do { \
222  if (am->trace_sessions) { \
223  CLIB_UNUSED(struct { u8 available_space[18 - sizeof(acl_elog_val1)]; } *static_check); \
224  u16 thread_index = os_get_thread_index (); \
225  vlib_worker_thread_t * w = vlib_worker_threads + thread_index; \
226  ELOG_TYPE_DECLARE (e) = \
227  { \
228  .format = "(%02d) " acl_elog_trace_format_label, \
229  .format_args = "i2" acl_elog_trace_format_args, \
230  }; \
231  CLIB_PACKED(struct \
232  { \
233  u16 thread; \
234  typeof(acl_elog_val1) val1; \
235  }) *ed; \
236  ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e, w->elog_track); \
237  ed->thread = thread_index; \
238  ed->val1 = acl_elog_val1; \
239  } \
240 } while (0)
241 
242 
243 /* use like: elog_acl_maybe_trace_X2(am, "foobar: %d some u64: %lu", "i4i8", int32_value, int64_value); */
244 
245 #define elog_acl_maybe_trace_X2(am, acl_elog_trace_format_label, acl_elog_trace_format_args, \
246  acl_elog_val1, acl_elog_val2) \
247 do { \
248  if (am->trace_sessions) { \
249  CLIB_UNUSED(struct { u8 available_space[18 - sizeof(acl_elog_val1) - sizeof(acl_elog_val2)]; } *static_check); \
250  u16 thread_index = os_get_thread_index (); \
251  vlib_worker_thread_t * w = vlib_worker_threads + thread_index; \
252  ELOG_TYPE_DECLARE (e) = \
253  { \
254  .format = "(%02d) " acl_elog_trace_format_label, \
255  .format_args = "i2" acl_elog_trace_format_args, \
256  }; \
257  CLIB_PACKED(struct \
258  { \
259  u16 thread; \
260  typeof(acl_elog_val1) val1; \
261  typeof(acl_elog_val2) val2; \
262  }) *ed; \
263  ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e, w->elog_track); \
264  ed->thread = thread_index; \
265  ed->val1 = acl_elog_val1; \
266  ed->val2 = acl_elog_val2; \
267  } \
268 } while (0)
269 
270 
271 /* use like: elog_acl_maybe_trace_X3(am, "foobar: %d some u64 %lu baz: %d", "i4i8i4", int32_value, u64_value, int_value); */
272 
273 #define elog_acl_maybe_trace_X3(am, acl_elog_trace_format_label, acl_elog_trace_format_args, acl_elog_val1, \
274  acl_elog_val2, acl_elog_val3) \
275 do { \
276  if (am->trace_sessions) { \
277  CLIB_UNUSED(struct { u8 available_space[18 - sizeof(acl_elog_val1) - sizeof(acl_elog_val2) \
278  - sizeof(acl_elog_val3)]; } *static_check); \
279  u16 thread_index = os_get_thread_index (); \
280  vlib_worker_thread_t * w = vlib_worker_threads + thread_index; \
281  ELOG_TYPE_DECLARE (e) = \
282  { \
283  .format = "(%02d) " acl_elog_trace_format_label, \
284  .format_args = "i2" acl_elog_trace_format_args, \
285  }; \
286  CLIB_PACKED(struct \
287  { \
288  u16 thread; \
289  typeof(acl_elog_val1) val1; \
290  typeof(acl_elog_val2) val2; \
291  typeof(acl_elog_val3) val3; \
292  }) *ed; \
293  ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e, w->elog_track); \
294  ed->thread = thread_index; \
295  ed->val1 = acl_elog_val1; \
296  ed->val2 = acl_elog_val2; \
297  ed->val3 = acl_elog_val3; \
298  } \
299 } while (0)
300 
301 
302 /* use like: elog_acl_maybe_trace_X4(am, "foobar: %d some int %d baz: %d bar: %d", "i4i4i4i4", int32_value, int32_value2, int_value, int_value); */
303 
304 #define elog_acl_maybe_trace_X4(am, acl_elog_trace_format_label, acl_elog_trace_format_args, acl_elog_val1, \
305  acl_elog_val2, acl_elog_val3, acl_elog_val4) \
306 do { \
307  if (am->trace_sessions) { \
308  CLIB_UNUSED(struct { u8 available_space[18 - sizeof(acl_elog_val1) - sizeof(acl_elog_val2) \
309  - sizeof(acl_elog_val3) -sizeof(acl_elog_val4)]; } *static_check); \
310  u16 thread_index = os_get_thread_index (); \
311  vlib_worker_thread_t * w = vlib_worker_threads + thread_index; \
312  ELOG_TYPE_DECLARE (e) = \
313  { \
314  .format = "(%02d) " acl_elog_trace_format_label, \
315  .format_args = "i2" acl_elog_trace_format_args, \
316  }; \
317  CLIB_PACKED(struct \
318  { \
319  u16 thread; \
320  typeof(acl_elog_val1) val1; \
321  typeof(acl_elog_val2) val2; \
322  typeof(acl_elog_val3) val3; \
323  typeof(acl_elog_val4) val4; \
324  }) *ed; \
325  ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e, w->elog_track); \
326  ed->thread = thread_index; \
327  ed->val1 = acl_elog_val1; \
328  ed->val2 = acl_elog_val2; \
329  ed->val3 = acl_elog_val3; \
330  ed->val4 = acl_elog_val4; \
331  } \
332 } while (0)
333 
334 
335 #endif
uword * pending_clear_sw_if_index_bitmap
Definition: fa_node.h:177
fa_session_l4_key_t l4
Definition: fa_node.h:71
fa_packet_info_t pkt
Definition: fa_node.h:73
unsigned long u64
Definition: types.h:89
fa_5tuple_t info
Definition: fa_node.h:83
#define CT_ASSERT_EQUAL(name, x, y)
Definition: fa_node.h:124
fa_session_t * fa_sessions_pool
Definition: fa_node.h:147
u8 link_list_id
Definition: fa_node.h:94
unsigned char u8
Definition: types.h:56
u16 lsb_of_sw_if_index
Definition: fa_node.h:51
u8 deleted
Definition: fa_node.h:95
u32 link_prev_idx
Definition: fa_node.h:92
enum @346 acl_fa_cleaner_process_event_e
unsigned int u32
Definition: types.h:88
unsigned short u16
Definition: types.h:57
u64 * fa_session_epoch_change_by_sw_if_index
Definition: fa_node.h:157
u64 last_active_time
Definition: fa_node.h:84
u64 * fa_conn_list_head_expiry_time
Definition: fa_node.h:152
u64 * fa_session_adds_by_sw_if_index
Definition: fa_node.h:155
u64 * fa_session_dels_by_sw_if_index
Definition: fa_node.h:154
vlib_main_t * vm
Definition: buffer.c:294
clib_bihash_kv_40_8_t kv_40_8
Definition: fa_node.h:75
void acl_fa_enable_disable(u32 sw_if_index, int is_input, int enable_disable)
acl_fa_next_t
Definition: fa_node.h:200
u32 sw_if_index
Definition: fa_node.h:85
clib_bihash_kv_16_8_t kv_16_8
Definition: fa_node.h:78
uword * serviced_sw_if_index_bitmap
Definition: fa_node.h:175
u32 link_next_idx
Definition: fa_node.h:93
u16 as_u16
Definition: fa_node.h:88
u64 uword
Definition: types.h:112
u8 * format_acl_plugin_5tuple(u8 *s, va_list *args)
u16 thread_index
Definition: fa_node.h:89
void show_fa_sessions_hash(vlib_main_t *vm, u32 verbose)
u16 mask_type_index_lsb
Definition: fa_node.h:31
u64 link_enqueue_time
Definition: fa_node.h:91