FD.io VPP  v19.04-6-g6f05f72
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 enum {
45 
46 typedef union {
48  struct {
49  u16 port[2];
50  union {
51  struct {
55  };
57  };
58  };
60 
61 
64  fa_session_l4_key_t k = { .as_u64 = l4key };
65  return (k.l4_flags & FA_SK_L4_FLAG_IS_SLOWPATH) ? 1 : 0;
66 }
67 
68 typedef union {
69  struct {
70  union {
71  struct {
72  /* we put the IPv4 addresses
73  after padding so we can still
74  use them as (shorter) key together with
75  L4 info */
76  u32 l3_zero_pad[6];
77  ip4_address_t ip4_addr[2];
78  };
79  ip6_address_t ip6_addr[2];
80  };
82  /* This field should align with u64 value in bihash_40_8 and bihash_16_8 keyvalue struct */
84  };
86  struct {
87  u64 padding_for_kv_16_8[3];
89  };
90 } fa_5tuple_t;
91 
93 format_fa_session_l4_key(u8 * s, va_list * args)
94 {
95  fa_session_l4_key_t *l4 = va_arg (*args, fa_session_l4_key_t *);
96  int is_input = (l4->l4_flags & FA_SK_L4_FLAG_IS_INPUT) ? 1 : 0;
97  int is_slowpath = (l4->l4_flags & FA_SK_L4_FLAG_IS_SLOWPATH) ? 1 : 0;
98 
99  return (format (s, "l4 lsb_of_sw_if_index %d proto %d l4_is_input %d l4_slow_path %d l4_flags 0x%02x port %d -> %d",
100  l4->lsb_of_sw_if_index,
101  l4->proto, is_input, is_slowpath,
102  l4->l4_flags, l4->port[0], l4->port[1]));
103 }
104 
105 typedef struct {
106  fa_5tuple_t info; /* (5+1)*8 = 48 bytes */
107  u64 last_active_time; /* +8 bytes = 56 */
108  u32 sw_if_index; /* +4 bytes = 60 */
109  union {
110  u8 as_u8[2];
112  } tcp_flags_seen; ; /* +2 bytes = 62 */
113  u16 thread_index; /* +2 bytes = 64 */
114  u64 link_enqueue_time; /* 8 byte = 8 */
115  u32 link_prev_idx; /* +4 bytes = 12 */
116  u32 link_next_idx; /* +4 bytes = 16 */
117  u8 link_list_id; /* +1 bytes = 17 */
118  u8 deleted; /* +1 bytes = 18 */
119  u8 is_ip6; /* +1 bytes = 19 */
120  u8 reserved1[5]; /* +5 bytes = 24 */
121  u64 reserved2[5]; /* +5*8 bytes = 64 */
122 } fa_session_t;
123 
124 #define FA_POLICY_EPOCH_MASK 0x7fff
125 /* input policy epochs have the MSB set */
126 #define FA_POLICY_EPOCH_IS_INPUT 0x8000
127 
128 
129 /* This structure is used to fill in the u64 value
130  in the per-sw-if-index hash table */
131 typedef struct {
132  union {
134  struct {
138  };
139  };
141 
142 /*
143  * A few compile-time constraints on the size and the layout of the union, to ensure
144  * it makes sense both for bihash and for us.
145  */
146 
147 #define CT_ASSERT_EQUAL(name, x,y) typedef int assert_ ## name ## _compile_time_assertion_failed[((x) == (y))-1]
148 CT_ASSERT_EQUAL(fa_l3_key_size_is_40, offsetof(fa_5tuple_t, pkt), offsetof(clib_bihash_kv_40_8_t, value));
149 CT_ASSERT_EQUAL(fa_ip6_kv_val_at_pkt, offsetof(fa_5tuple_t, pkt), offsetof(fa_5tuple_t, kv_40_8.value));
150 CT_ASSERT_EQUAL(fa_ip4_kv_val_at_pkt, offsetof(fa_5tuple_t, pkt), offsetof(fa_5tuple_t, kv_16_8.value));
151 CT_ASSERT_EQUAL(fa_l4_key_t_is_8, sizeof(fa_session_l4_key_t), sizeof(u64));
152 CT_ASSERT_EQUAL(fa_packet_info_t_is_8, sizeof(fa_packet_info_t), sizeof(u64));
153 CT_ASSERT_EQUAL(fa_l3_kv_size_is_48, sizeof(fa_5tuple_t), sizeof(clib_bihash_kv_40_8_t));
154 CT_ASSERT_EQUAL(fa_ip4_starts_at_kv16_key, offsetof(fa_5tuple_t, ip4_addr), offsetof(fa_5tuple_t, kv_16_8));
155 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));
156 
157 /* Let's try to fit within two cachelines */
158 CT_ASSERT_EQUAL(fa_session_t_size_is_128, sizeof(fa_session_t), 128);
159 
160 /* Session ID MUST be the same as u64 */
161 CT_ASSERT_EQUAL(fa_full_session_id_size_is_64, sizeof(fa_full_session_id_t), sizeof(u64));
162 
163 CT_ASSERT_EQUAL(fa_5tuple_opaque_t_must_match_5tuple, sizeof(fa_5tuple_opaque_t), sizeof(fa_5tuple_t));
164 #undef CT_ASSERT_EQUAL
165 
166 #define FA_SESSION_BOGUS_INDEX ~0
167 
168 typedef struct {
169  /* The pool of sessions managed by this worker */
171  /* incoming session change requests from other workers */
177  /* per-worker ACL_N_TIMEOUTS of conn lists */
180  /* expiry time set whenever an element is enqueued */
182  /* adds and deletes per-worker-per-interface */
185  /* sessions deleted due to epoch change */
187  /* Vector of expired connections retrieved from lists */
189  /* the earliest next expiry time */
191  /* if not zero, look at all the elements until their enqueue timestamp is after below one */
193  /* Current time between the checks */
195  /* Counter of how many sessions we did delete */
197  /* Counter of already deleted sessions being deleted - should not increment unless a bug */
199  /* Number of times we requeued a session to a head of the list */
201  /* swipe up to this enqueue time, rather than following the timeouts */
203  /* bitmap of sw_if_index serviced by this worker */
205  /* bitmap of sw_if_indices to clear. set by main thread, cleared by worker */
207  /* atomic, indicates that the swipe-deletion of connections is in progress */
209  /* Interrupt is pending from main thread */
211  /*
212  * Interrupt node on the worker thread sets this if it knows there is
213  * more work to do, but it has to finish to avoid hogging the
214  * core for too long.
215  */
217  /*
218  * Set to indicate that the interrupt node wants to get less interrupts
219  * because there is not enough work for the current rate.
220  */
222  /*
223  * Set to copy of a "generation" counter in main thread so we can sync the interrupts.
224  */
226  /*
227  * work in progress data for the pipelined node operation
228  */
230  u32 sw_if_indices[VLIB_FRAME_SIZE];
234 
236 
237 
238 typedef enum {
241 } acl_fa_next_t;
242 
243 
244 typedef enum
245 {
249 
250 void acl_fa_enable_disable(u32 sw_if_index, int is_input, int enable_disable);
251 
252 void show_fa_sessions_hash(vlib_main_t * vm, u32 verbose);
253 
254 u8 *format_acl_plugin_5tuple (u8 * s, va_list * args);
255 
256 /* use like: elog_acl_maybe_trace_X1(am, "foobar: %d", "i4", int32_value); */
257 
258 #define elog_acl_maybe_trace_X1(am, acl_elog_trace_format_label, acl_elog_trace_format_args, acl_elog_val1) \
259 do { \
260  if (am->trace_sessions) { \
261  CLIB_UNUSED(struct { u8 available_space[18 - sizeof(acl_elog_val1)]; } *static_check); \
262  u16 thread_index = os_get_thread_index (); \
263  vlib_worker_thread_t * w = vlib_worker_threads + thread_index; \
264  ELOG_TYPE_DECLARE (e) = \
265  { \
266  .format = "(%02d) " acl_elog_trace_format_label, \
267  .format_args = "i2" acl_elog_trace_format_args, \
268  }; \
269  CLIB_PACKED(struct \
270  { \
271  u16 thread; \
272  typeof(acl_elog_val1) val1; \
273  }) *ed; \
274  ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e, w->elog_track); \
275  ed->thread = thread_index; \
276  ed->val1 = acl_elog_val1; \
277  } \
278 } while (0)
279 
280 
281 /* use like: elog_acl_maybe_trace_X2(am, "foobar: %d some u64: %lu", "i4i8", int32_value, int64_value); */
282 
283 #define elog_acl_maybe_trace_X2(am, acl_elog_trace_format_label, acl_elog_trace_format_args, \
284  acl_elog_val1, acl_elog_val2) \
285 do { \
286  if (am->trace_sessions) { \
287  CLIB_UNUSED(struct { u8 available_space[18 - sizeof(acl_elog_val1) - sizeof(acl_elog_val2)]; } *static_check); \
288  u16 thread_index = os_get_thread_index (); \
289  vlib_worker_thread_t * w = vlib_worker_threads + thread_index; \
290  ELOG_TYPE_DECLARE (e) = \
291  { \
292  .format = "(%02d) " acl_elog_trace_format_label, \
293  .format_args = "i2" acl_elog_trace_format_args, \
294  }; \
295  CLIB_PACKED(struct \
296  { \
297  u16 thread; \
298  typeof(acl_elog_val1) val1; \
299  typeof(acl_elog_val2) val2; \
300  }) *ed; \
301  ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e, w->elog_track); \
302  ed->thread = thread_index; \
303  ed->val1 = acl_elog_val1; \
304  ed->val2 = acl_elog_val2; \
305  } \
306 } while (0)
307 
308 
309 /* use like: elog_acl_maybe_trace_X3(am, "foobar: %d some u64 %lu baz: %d", "i4i8i4", int32_value, u64_value, int_value); */
310 
311 #define elog_acl_maybe_trace_X3(am, acl_elog_trace_format_label, acl_elog_trace_format_args, acl_elog_val1, \
312  acl_elog_val2, acl_elog_val3) \
313 do { \
314  if (am->trace_sessions) { \
315  CLIB_UNUSED(struct { u8 available_space[18 - sizeof(acl_elog_val1) - sizeof(acl_elog_val2) \
316  - sizeof(acl_elog_val3)]; } *static_check); \
317  u16 thread_index = os_get_thread_index (); \
318  vlib_worker_thread_t * w = vlib_worker_threads + thread_index; \
319  ELOG_TYPE_DECLARE (e) = \
320  { \
321  .format = "(%02d) " acl_elog_trace_format_label, \
322  .format_args = "i2" acl_elog_trace_format_args, \
323  }; \
324  CLIB_PACKED(struct \
325  { \
326  u16 thread; \
327  typeof(acl_elog_val1) val1; \
328  typeof(acl_elog_val2) val2; \
329  typeof(acl_elog_val3) val3; \
330  }) *ed; \
331  ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e, w->elog_track); \
332  ed->thread = thread_index; \
333  ed->val1 = acl_elog_val1; \
334  ed->val2 = acl_elog_val2; \
335  ed->val3 = acl_elog_val3; \
336  } \
337 } while (0)
338 
339 
340 /* 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); */
341 
342 #define elog_acl_maybe_trace_X4(am, acl_elog_trace_format_label, acl_elog_trace_format_args, acl_elog_val1, \
343  acl_elog_val2, acl_elog_val3, acl_elog_val4) \
344 do { \
345  if (am->trace_sessions) { \
346  CLIB_UNUSED(struct { u8 available_space[18 - sizeof(acl_elog_val1) - sizeof(acl_elog_val2) \
347  - sizeof(acl_elog_val3) -sizeof(acl_elog_val4)]; } *static_check); \
348  u16 thread_index = os_get_thread_index (); \
349  vlib_worker_thread_t * w = vlib_worker_threads + thread_index; \
350  ELOG_TYPE_DECLARE (e) = \
351  { \
352  .format = "(%02d) " acl_elog_trace_format_label, \
353  .format_args = "i2" acl_elog_trace_format_args, \
354  }; \
355  CLIB_PACKED(struct \
356  { \
357  u16 thread; \
358  typeof(acl_elog_val1) val1; \
359  typeof(acl_elog_val2) val2; \
360  typeof(acl_elog_val3) val3; \
361  typeof(acl_elog_val4) val4; \
362  }) *ed; \
363  ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e, w->elog_track); \
364  ed->thread = thread_index; \
365  ed->val1 = acl_elog_val1; \
366  ed->val2 = acl_elog_val2; \
367  ed->val3 = acl_elog_val3; \
368  ed->val4 = acl_elog_val4; \
369  } \
370 } while (0)
371 
372 
373 #endif
u32 sw_if_index
Definition: ipsec_gre.api:37
uword * pending_clear_sw_if_index_bitmap
Definition: fa_node.h:206
fa_session_l4_key_t l4
Definition: fa_node.h:81
fa_packet_info_t pkt
Definition: fa_node.h:83
unsigned long u64
Definition: types.h:89
u64 * wip_session_change_requests
Definition: fa_node.h:174
fa_5tuple_t info
Definition: fa_node.h:106
#define CT_ASSERT_EQUAL(name, x, y)
Definition: fa_node.h:147
fa_session_t * fa_sessions_pool
Definition: fa_node.h:170
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
u8 link_list_id
Definition: fa_node.h:117
unsigned char u8
Definition: types.h:56
u16 lsb_of_sw_if_index
Definition: fa_node.h:54
#define static_always_inline
Definition: clib.h:99
u32 link_prev_idx
Definition: fa_node.h:115
unsigned int u32
Definition: types.h:88
#define VLIB_FRAME_SIZE
Definition: node.h:376
unsigned short u16
Definition: types.h:57
u64 * fa_session_epoch_change_by_sw_if_index
Definition: fa_node.h:186
fa_session_l4_key_l4_flags_t
Definition: fa_node.h:41
static_always_inline int is_session_l4_key_u64_slowpath(u64 l4key)
Definition: fa_node.h:63
u64 last_active_time
Definition: fa_node.h:107
u64 * fa_conn_list_head_expiry_time
Definition: fa_node.h:181
u64 * fa_session_adds_by_sw_if_index
Definition: fa_node.h:184
u64 * fa_session_dels_by_sw_if_index
Definition: fa_node.h:183
vlib_main_t * vm
Definition: buffer.c:312
clib_bihash_kv_40_8_t kv_40_8
Definition: fa_node.h:85
void acl_fa_enable_disable(u32 sw_if_index, int is_input, int enable_disable)
acl_fa_next_t
Definition: fa_node.h:238
u32 sw_if_index
Definition: fa_node.h:108
static_always_inline u8 * format_fa_session_l4_key(u8 *s, va_list *args)
Definition: fa_node.h:93
clib_bihash_kv_16_8_t kv_16_8
Definition: fa_node.h:88
uword * serviced_sw_if_index_bitmap
Definition: fa_node.h:204
u32 link_next_idx
Definition: fa_node.h:116
u16 as_u16
Definition: fa_node.h:111
VLIB buffer representation.
Definition: buffer.h:102
u64 uword
Definition: types.h:112
u8 * format_acl_plugin_5tuple(u8 *s, va_list *args)
u16 thread_index
Definition: fa_node.h:112
clib_spinlock_t pending_session_change_request_lock
Definition: fa_node.h:172
void show_fa_sessions_hash(vlib_main_t *vm, u32 verbose)
u16 mask_type_index_lsb
Definition: fa_node.h:31
u64 * pending_session_change_requests
Definition: fa_node.h:173
acl_fa_cleaner_process_event_e
Definition: fa_node.h:244
u64 link_enqueue_time
Definition: fa_node.h:114