Line data Source code
1 : /* The xdp tile translates between AF_XDP and fd_tango
2 : traffic. It is responsible for setting up the XDP and
3 : XSK socket configuration. */
4 :
5 : #include <errno.h>
6 : #include <fcntl.h>
7 : #include <net/if.h>
8 : #include <netinet/in.h>
9 : #include <sys/socket.h> /* MSG_DONTWAIT needed before importing the net seccomp filter */
10 : #include <linux/if_xdp.h>
11 :
12 : #include "../fd_net_common.h"
13 : #include "../../metrics/fd_metrics.h"
14 : #include "../../netlink/fd_netlink_tile.h" /* neigh4_solicit */
15 : #include "../../topo/fd_topo.h"
16 :
17 : #include "../../../waltz/ip/fd_fib4.h"
18 : #include "../../../waltz/neigh/fd_neigh4_map.h"
19 : #include "../../../waltz/mib/fd_netdev_tbl.h"
20 : #include "../../../waltz/mib/fd_dbl_buf.h"
21 : #include "../../../waltz/xdp/fd_xdp_redirect_user.h" /* fd_xsk_activate */
22 : #include "../../../waltz/xdp/fd_xsk.h"
23 : #include "../../../util/log/fd_dtrace.h"
24 : #include "../../../util/net/fd_eth.h"
25 : #include "../../../util/net/fd_ip4.h"
26 : #include "../../../util/net/fd_gre.h"
27 :
28 : #include <unistd.h>
29 : #include <linux/if.h> /* struct ifreq */
30 : #include <sys/ioctl.h>
31 : #include <linux/unistd.h>
32 : #include <linux/if_arp.h>
33 :
34 : #include "generated/fd_xdp_tile_seccomp.h"
35 :
36 : /* MAX_NET_INS controls the max number of TX links that a net tile can
37 : serve. */
38 :
39 : #define MAX_NET_INS (32UL)
40 :
41 : /* FD_XDP_STATS_INTERVAL_NS controls the XDP stats refresh interval.
42 : This should be lower than the interval at which the metrics tile
43 : collects metrics. */
44 :
45 0 : #define FD_XDP_STATS_INTERVAL_NS (11e6) /* 11ms */
46 :
47 : /* XSK_IDX_{MAIN,LO} are the hardcoded XSK indices in ctx->xsk[ ... ].
48 : Only net tile 0 has XSK_IDX_LO, all net tiles have XSK_IDX_MAIN. */
49 :
50 30 : #define XSK_IDX_MAIN 0
51 18 : #define XSK_IDX_LO 1
52 :
53 : /* fd_net_in_ctx_t contains consumer information for an incoming tango
54 : link. It is used as part of the TX path. */
55 :
56 : typedef struct {
57 : fd_wksp_t * mem;
58 : ulong chunk0;
59 : ulong wmark;
60 : } fd_net_in_ctx_t;
61 :
62 : /* fd_net_out_ctx_t contains publisher information for a link to a
63 : downstream app tile. It is used as part of the RX path. */
64 :
65 : typedef struct {
66 : fd_frag_meta_t * mcache;
67 : ulong * sync;
68 : ulong depth;
69 : ulong seq;
70 : } fd_net_out_ctx_t;
71 :
72 : /* fd_net_flusher_t controls the pacing of XDP sendto calls for flushing
73 : TX batches. In the 'wakeup' XDP mode, no TX occurs unless the net
74 : tile wakes up the kernel periodically using the sendto() syscall.
75 : If sendto() is called too frequently, time is wasted on context
76 : switches. If sendto() is called not often enough, packets are
77 : delayed or dropped. sendto() calls make almost no guarantees how
78 : much packets are sent out, nor do they indicate when the kernel
79 : finishes a wakeup call (asynchronously dispatched). The net tile
80 : thus uses a myraid of flush triggers that were tested for best
81 : performance. */
82 :
83 : struct fd_net_flusher {
84 :
85 : /* Packets that were enqueued after the last sendto() wakeup are
86 : considered "pending". If there are more than pending_wmark packets
87 : pending, a wakeup is dispatched. Thus, this dispatch trigger is
88 : proportional to packet rate, but does not trigger if I/O is seldom. */
89 : ulong pending_cnt;
90 : ulong pending_wmark;
91 :
92 : /* Sometimes, packets are not flushed out even after a sendto()
93 : wakeup. This can result in the tail of a burst getting delayed or
94 : overrun. If more than tail_flush_backoff ticks pass since the last
95 : sendto() wakeup and there are still unacknowledged packets in the
96 : TX ring, issues another wakeup. */
97 : long next_tail_flush_ticks;
98 : long tail_flush_backoff;
99 :
100 : };
101 :
102 : typedef struct fd_net_flusher fd_net_flusher_t;
103 :
104 : FD_PROTOTYPES_BEGIN
105 :
106 : /* fd_net_flusher_inc marks a new packet as enqueued. */
107 :
108 : static inline void
109 : fd_net_flusher_inc( fd_net_flusher_t * flusher,
110 18 : long now ) {
111 18 : flusher->pending_cnt++;
112 18 : long next_flush = now + flusher->tail_flush_backoff;
113 18 : flusher->next_tail_flush_ticks = fd_long_min( flusher->next_tail_flush_ticks, next_flush );
114 18 : }
115 :
116 : /* fd_net_flusher_check returns 1 if a sendto() wakeup should be issued
117 : immediately. now is a recent fd_tickcount() value.
118 : If tx_ring_empty==0 then the kernel is caught up with the net tile
119 : on the XDP TX ring. (Otherwise, the kernel is behind the net tile) */
120 :
121 : static inline int
122 : fd_net_flusher_check( fd_net_flusher_t * flusher,
123 : long now,
124 18 : int tx_ring_empty ) {
125 18 : int flush_level = flusher->pending_cnt >= flusher->pending_wmark;
126 18 : int flush_timeout = now >= flusher->next_tail_flush_ticks;
127 18 : int flush = flush_level || flush_timeout;
128 18 : if( !flush ) return 0;
129 18 : if( FD_UNLIKELY( tx_ring_empty ) ) {
130 : /* Flush requested but caught up */
131 3 : flusher->pending_cnt = 0UL;
132 3 : flusher->next_tail_flush_ticks = LONG_MAX;
133 3 : return 0;
134 3 : }
135 15 : return 1;
136 18 : }
137 :
138 : /* fd_net_flusher_wakeup signals a sendto() wakeup was done. now is a
139 : recent fd_tickcount() value. */
140 :
141 : static inline void
142 : fd_net_flusher_wakeup( fd_net_flusher_t * flusher,
143 15 : long now ) {
144 15 : flusher->pending_cnt = 0UL;
145 15 : flusher->next_tail_flush_ticks = now + flusher->tail_flush_backoff;
146 15 : }
147 :
148 : FD_PROTOTYPES_END
149 :
150 : /* fd_net_free_ring is a FIFO queue that stores pointers to free XDP TX
151 : frames. */
152 :
153 : struct fd_net_free_ring {
154 : ulong prod;
155 : ulong cons;
156 : ulong depth;
157 : ulong * queue;
158 : };
159 : typedef struct fd_net_free_ring fd_net_free_ring_t;
160 :
161 : typedef struct {
162 : /* An "XSK" is an AF_XDP socket */
163 : uint xsk_cnt;
164 : fd_xsk_t xsk[ 2 ];
165 : int prog_link_fds[ 2 ];
166 :
167 : /* UMEM frame region within dcache */
168 : void * umem_frame0; /* First UMEM frame */
169 : ulong umem_sz; /* Usable UMEM size starting at frame0 */
170 :
171 : /* UMEM chunk region within workspace */
172 : uint umem_chunk0; /* Lowest allowed chunk number */
173 : uint umem_wmark; /* Highest allowed chunk number */
174 :
175 : /* All net tiles are subscribed to the same TX links. (These are
176 : incoming links from app tiles asking the net tile to send out packets)
177 : The net tiles "take turns" doing TX jobs based on the L3+L4 dst hash.
178 : net_tile_id is the index of the current interface, net_tile_cnt is the
179 : total amount of interfaces. */
180 : uint net_tile_id;
181 : uint net_tile_cnt;
182 :
183 : /* Details pertaining to an inflight send op */
184 : struct {
185 : uint xsk_idx;
186 : void * frame;
187 : uchar mac_addrs[12]; /* First 12 bytes of Ethernet header */
188 : uint src_ip; /* src_ip in net order */
189 :
190 : uint use_gre; /* The tx packet will be GRE-encapsulated */
191 : uint gre_outer_src_ip; /* For GRE: Outer iphdr's src_ip in net order */
192 : uint gre_outer_dst_ip; /* For GRE: Outer iphdr's dst_ip in net order */
193 : } tx_op;
194 :
195 : /* Round-robin cycle serivce operations */
196 : uint rr_idx;
197 :
198 : /* Ring tracking free packet buffers */
199 : fd_net_free_ring_t free_tx;
200 :
201 : uchar src_mac_addr[6];
202 :
203 : uint default_address;
204 : uint bind_address;
205 : ushort shred_listen_port;
206 : ushort quic_transaction_listen_port;
207 : ushort legacy_transaction_listen_port;
208 : ushort gossip_listen_port;
209 : ushort repair_intake_listen_port;
210 : ushort repair_serve_listen_port;
211 : ushort send_src_port;
212 :
213 : ulong in_cnt;
214 : fd_net_in_ctx_t in[ MAX_NET_INS ];
215 :
216 : fd_net_out_ctx_t quic_out[1];
217 : fd_net_out_ctx_t shred_out[1];
218 : fd_net_out_ctx_t gossip_out[1];
219 : fd_net_out_ctx_t repair_out[1];
220 : fd_net_out_ctx_t send_out[1];
221 :
222 : /* XDP stats refresh timer */
223 : long xdp_stats_interval_ticks;
224 : long next_xdp_stats_refresh;
225 :
226 : /* TX flush timers */
227 : fd_net_flusher_t tx_flusher[2]; /* one per XSK */
228 :
229 : /* Route and neighbor tables */
230 : fd_fib4_t const * fib_local;
231 : fd_fib4_t const * fib_main;
232 : fd_neigh4_hmap_t neigh4[1];
233 : fd_netlink_neigh4_solicit_link_t neigh4_solicit[1];
234 :
235 : /* Netdev table */
236 : fd_dbl_buf_t * netdev_dbl_buf; /* remote copy of device table */
237 : uchar * netdev_buf; /* local copy of device table */
238 : ulong netdev_buf_sz;
239 : fd_netdev_tbl_join_t netdev_tbl; /* join to local copy of device table */
240 : int has_gre_interface; /* enable GRE support? */
241 :
242 : struct {
243 : ulong rx_pkt_cnt;
244 : ulong rx_bytes_total;
245 : ulong rx_undersz_cnt;
246 : ulong rx_fill_blocked_cnt;
247 : ulong rx_backp_cnt;
248 : long rx_busy_cnt;
249 : long rx_idle_cnt;
250 :
251 : ulong tx_submit_cnt;
252 : ulong tx_complete_cnt;
253 : ulong tx_bytes_total;
254 : ulong tx_route_fail_cnt;
255 : ulong tx_no_xdp_cnt;
256 : ulong tx_neigh_fail_cnt;
257 : ulong tx_full_fail_cnt;
258 : long tx_busy_cnt;
259 : long tx_idle_cnt;
260 :
261 : ulong xsk_tx_wakeup_cnt;
262 : ulong xsk_rx_wakeup_cnt;
263 :
264 : ulong rx_gre_cnt;
265 : ulong rx_gre_ignored_cnt;
266 : ulong rx_gre_inv_pkt_cnt;
267 : ulong tx_gre_cnt;
268 : ulong tx_gre_route_fail_cnt;
269 : } metrics;
270 : } fd_net_ctx_t;
271 :
272 : FD_FN_CONST static inline ulong
273 9 : scratch_align( void ) {
274 9 : return 4096UL;
275 9 : }
276 :
277 : FD_FN_PURE static inline ulong
278 3 : scratch_footprint( fd_topo_tile_t const * tile ) {
279 3 : ulong l = FD_LAYOUT_INIT;
280 3 : l = FD_LAYOUT_APPEND( l, alignof(fd_net_ctx_t), sizeof(fd_net_ctx_t) );
281 3 : l = FD_LAYOUT_APPEND( l, alignof(ulong), tile->xdp.free_ring_depth * sizeof(ulong) );
282 3 : l = FD_LAYOUT_APPEND( l, fd_netdev_tbl_align(), fd_netdev_tbl_footprint( NETDEV_MAX, BOND_MASTER_MAX ) );
283 3 : return FD_LAYOUT_FINI( l, scratch_align() );
284 3 : }
285 :
286 : static void
287 0 : metrics_write( fd_net_ctx_t * ctx ) {
288 0 : FD_MCNT_SET( NET, RX_PKT_CNT, ctx->metrics.rx_pkt_cnt );
289 0 : FD_MCNT_SET( NET, RX_BYTES_TOTAL, ctx->metrics.rx_bytes_total );
290 0 : FD_MCNT_SET( NET, RX_UNDERSZ_CNT, ctx->metrics.rx_undersz_cnt );
291 0 : FD_MCNT_SET( NET, RX_FILL_BLOCKED_CNT, ctx->metrics.rx_fill_blocked_cnt );
292 0 : FD_MCNT_SET( NET, RX_BACKPRESSURE_CNT, ctx->metrics.rx_backp_cnt );
293 0 : FD_MGAUGE_SET( NET, RX_BUSY_CNT, (ulong)fd_long_max( ctx->metrics.rx_busy_cnt, 0L ) );
294 0 : FD_MGAUGE_SET( NET, RX_IDLE_CNT, (ulong)fd_long_max( ctx->metrics.rx_idle_cnt, 0L ) );
295 0 : FD_MGAUGE_SET( NET, TX_BUSY_CNT, (ulong)fd_long_max( ctx->metrics.tx_busy_cnt, 0L ) );
296 0 : FD_MGAUGE_SET( NET, TX_IDLE_CNT, (ulong)fd_long_max( ctx->metrics.tx_idle_cnt, 0L ) );
297 :
298 0 : FD_MCNT_SET( NET, TX_SUBMIT_CNT, ctx->metrics.tx_submit_cnt );
299 0 : FD_MCNT_SET( NET, TX_COMPLETE_CNT, ctx->metrics.tx_complete_cnt );
300 0 : FD_MCNT_SET( NET, TX_BYTES_TOTAL, ctx->metrics.tx_bytes_total );
301 0 : FD_MCNT_SET( NET, TX_ROUTE_FAIL_CNT, ctx->metrics.tx_route_fail_cnt );
302 0 : FD_MCNT_SET( NET, TX_NEIGHBOR_FAIL_CNT, ctx->metrics.tx_neigh_fail_cnt );
303 0 : FD_MCNT_SET( NET, TX_FULL_FAIL_CNT, ctx->metrics.tx_full_fail_cnt );
304 :
305 0 : FD_MCNT_SET( NET, XSK_TX_WAKEUP_CNT, ctx->metrics.xsk_tx_wakeup_cnt );
306 0 : FD_MCNT_SET( NET, XSK_RX_WAKEUP_CNT, ctx->metrics.xsk_rx_wakeup_cnt );
307 :
308 0 : FD_MCNT_SET( NET, RX_GRE_CNT, ctx->metrics.rx_gre_cnt );
309 0 : FD_MCNT_SET( NET, RX_GRE_INVALID_CNT, ctx->metrics.rx_gre_inv_pkt_cnt );
310 0 : FD_MCNT_SET( NET, RX_GRE_IGNORED_CNT, ctx->metrics.rx_gre_ignored_cnt );
311 0 : FD_MCNT_SET( NET, TX_GRE_CNT, ctx->metrics.tx_gre_cnt );
312 0 : FD_MCNT_SET( NET, TX_GRE_ROUTE_FAIL_CNT, ctx->metrics.tx_gre_route_fail_cnt );
313 0 : }
314 :
315 : struct xdp_statistics_v0 {
316 : __u64 rx_dropped; /* Dropped for other reasons */
317 : __u64 rx_invalid_descs; /* Dropped due to invalid descriptor */
318 : __u64 tx_invalid_descs; /* Dropped due to invalid descriptor */
319 : };
320 :
321 : struct xdp_statistics_v1 {
322 : __u64 rx_dropped; /* Dropped for other reasons */
323 : __u64 rx_invalid_descs; /* Dropped due to invalid descriptor */
324 : __u64 tx_invalid_descs; /* Dropped due to invalid descriptor */
325 : __u64 rx_ring_full; /* Dropped due to rx ring being full */
326 : __u64 rx_fill_ring_empty_descs; /* Failed to retrieve item from fill ring */
327 : __u64 tx_ring_empty_descs; /* Failed to retrieve item from tx ring */
328 : };
329 :
330 : static void
331 0 : poll_xdp_statistics( fd_net_ctx_t * ctx ) {
332 0 : struct xdp_statistics_v1 stats = {0};
333 0 : ulong xsk_cnt = ctx->xsk_cnt;
334 0 : for( ulong j=0UL; j<xsk_cnt; j++ ) {
335 0 : struct xdp_statistics_v1 sub_stats;
336 0 : uint optlen = (uint)sizeof(struct xdp_statistics_v1);
337 0 : if( FD_UNLIKELY( -1==getsockopt( ctx->xsk[ j ].xsk_fd, SOL_XDP, XDP_STATISTICS, &sub_stats, &optlen ) ) )
338 0 : FD_LOG_ERR(( "getsockopt(SOL_XDP, XDP_STATISTICS) failed: %s", strerror( errno ) ));
339 0 : if( FD_UNLIKELY( optlen!=sizeof(struct xdp_statistics_v0) &&
340 0 : optlen!=sizeof(struct xdp_statistics_v1) ) ) {
341 0 : FD_LOG_ERR(( "getsockopt(SOL_XDP, XDP_STATISTICS) returned unexpected size %u", optlen ));
342 0 : }
343 0 : stats.rx_dropped += sub_stats.rx_dropped;
344 0 : stats.rx_invalid_descs += sub_stats.rx_invalid_descs;
345 0 : stats.tx_invalid_descs += sub_stats.tx_invalid_descs;
346 0 : stats.rx_ring_full += sub_stats.rx_ring_full;
347 0 : stats.rx_fill_ring_empty_descs += sub_stats.rx_fill_ring_empty_descs;
348 0 : stats.tx_ring_empty_descs += sub_stats.tx_ring_empty_descs;
349 0 : }
350 :
351 0 : FD_MCNT_SET( NET, XDP_RX_DROPPED_OTHER, stats.rx_dropped );
352 0 : FD_MCNT_SET( NET, XDP_RX_INVALID_DESCS, stats.rx_invalid_descs );
353 0 : FD_MCNT_SET( NET, XDP_TX_INVALID_DESCS, stats.tx_invalid_descs );
354 0 : FD_MCNT_SET( NET, XDP_RX_RING_FULL, stats.rx_ring_full );
355 0 : FD_MCNT_SET( NET, XDP_RX_FILL_RING_EMPTY_DESCS, stats.rx_fill_ring_empty_descs );
356 0 : FD_MCNT_SET( NET, XDP_TX_RING_EMPTY_DESCS, stats.tx_ring_empty_descs );
357 0 : }
358 :
359 : /* net_is_fatal_xdp_error returns 1 if the given errno returned by an
360 : XDP API indicates a non-recoverable error code. The net tile should
361 : crash if it sees such an error so the problem does not go undetected.
362 : Otherwise, returns 0. */
363 :
364 : static int
365 0 : net_is_fatal_xdp_error( int err ) {
366 0 : return err==ESOCKTNOSUPPORT || err==EOPNOTSUPP || err==EINVAL ||
367 0 : err==EPERM;
368 0 : }
369 :
370 : /* Load the netdev table to ctx->netdev_buf. Create a join in ctx->netdev_tbl_handle */
371 :
372 : static void
373 0 : net_load_netdev_tbl( fd_net_ctx_t * ctx ) {
374 : /* Copy netdev table from netlink tile. This could fail briefly
375 : during startup if the netlink tile is late to start up. */
376 0 : if( FD_UNLIKELY( !fd_dbl_buf_read( ctx->netdev_dbl_buf, ctx->netdev_buf_sz, ctx->netdev_buf, NULL ) ) ) return;
377 :
378 : /* Join local copy */
379 0 : if( FD_UNLIKELY( !fd_netdev_tbl_join( &ctx->netdev_dbl_buf, ctx->netdev_buf ) ) ) FD_LOG_ERR(("netdev table join failed"));
380 0 : }
381 :
382 : /* Query the netdev table. Return a fd_netdev_t pointer to the net device of the
383 : interface specified by if_idx. Null if the if_idx is invalid */
384 :
385 : static fd_netdev_t *
386 : net_query_netdev_tbl( fd_net_ctx_t * ctx,
387 33 : uint if_idx ) {
388 : /* dev_tbl is one-indexed */
389 33 : if( if_idx>ctx->netdev_tbl.hdr->dev_cnt ) return NULL;
390 30 : return &ctx->netdev_tbl.dev_tbl[ if_idx ];
391 33 : }
392 :
393 : /* Iterates the netdev table and returns 1 if a GRE interface exists, 0 otherwise.
394 : Only called in privileged_init and during_housekeeping */
395 :
396 : static int
397 3 : net_check_gre_interface_exists( fd_net_ctx_t * ctx ) {
398 3 : fd_netdev_t * dev_tbl = ctx->netdev_tbl.dev_tbl;
399 3 : ushort dev_cnt = ctx->netdev_tbl.hdr->dev_cnt;
400 :
401 3 : for( ushort if_idx = 0; if_idx<dev_cnt; if_idx++ ) {
402 0 : if( dev_tbl[if_idx].dev_type==ARPHRD_IPGRE ) return 1;
403 0 : }
404 3 : return 0;
405 3 : }
406 :
407 :
408 : /* net_tx_ready returns 1 if the current XSK is ready to submit a TX send
409 : job. If the XSK is blocked for sends, returns 0. Reasons for block
410 : include:
411 : - No XSK TX buffer is available
412 : - XSK TX ring is full */
413 :
414 : static int
415 : net_tx_ready( fd_net_ctx_t * ctx,
416 18 : uint xsk_idx ) {
417 18 : fd_xsk_t * xsk = &ctx->xsk[ xsk_idx ];
418 18 : fd_xdp_ring_t * tx_ring = &xsk->ring_tx;
419 18 : fd_net_free_ring_t * free = &ctx->free_tx;
420 18 : if( free->prod == free->cons ) return 0; /* drop */
421 18 : if( tx_ring->prod - tx_ring->cons >= tx_ring->depth ) return 0; /* drop */
422 18 : return 1;
423 18 : }
424 :
425 : /* net_rx_wakeup triggers xsk_recvmsg to run in the kernel. Needs to be
426 : called periodically in order to receive packets. */
427 :
428 : static void
429 : net_rx_wakeup( fd_net_ctx_t * ctx,
430 : fd_xsk_t * xsk,
431 0 : int * charge_busy ) {
432 0 : if( !fd_xsk_rx_need_wakeup( xsk ) ) return;
433 0 : *charge_busy = 1;
434 0 : struct msghdr _ignored[ 1 ] = { 0 };
435 0 : if( FD_UNLIKELY( -1==recvmsg( xsk->xsk_fd, _ignored, MSG_DONTWAIT ) ) ) {
436 0 : if( FD_UNLIKELY( net_is_fatal_xdp_error( errno ) ) ) {
437 0 : FD_LOG_ERR(( "xsk recvmsg failed xsk_fd=%d (%i-%s)", xsk->xsk_fd, errno, fd_io_strerror( errno ) ));
438 0 : }
439 0 : if( FD_UNLIKELY( errno!=EAGAIN ) ) {
440 0 : long ts = fd_log_wallclock();
441 0 : if( ts > xsk->log_suppress_until_ns ) {
442 0 : FD_LOG_WARNING(( "xsk recvmsg failed xsk_fd=%d (%i-%s)", xsk->xsk_fd, errno, fd_io_strerror( errno ) ));
443 0 : xsk->log_suppress_until_ns = ts + (long)1e9;
444 0 : }
445 0 : }
446 0 : }
447 0 : ctx->metrics.xsk_rx_wakeup_cnt++;
448 0 : }
449 :
450 : /* net_tx_wakeup triggers xsk_sendmsg to run in the kernel. Needs to be
451 : called periodically in order to transmit packets. */
452 :
453 : static void
454 : net_tx_wakeup( fd_net_ctx_t * ctx,
455 : fd_xsk_t * xsk,
456 15 : int * charge_busy ) {
457 15 : if( !fd_xsk_tx_need_wakeup( xsk ) ) return;
458 0 : if( FD_VOLATILE_CONST( *xsk->ring_tx.prod )==FD_VOLATILE_CONST( *xsk->ring_tx.cons ) ) return;
459 0 : *charge_busy = 1;
460 0 : if( FD_UNLIKELY( -1==sendto( xsk->xsk_fd, NULL, 0, MSG_DONTWAIT, NULL, 0 ) ) ) {
461 0 : if( FD_UNLIKELY( net_is_fatal_xdp_error( errno ) ) ) {
462 0 : FD_LOG_ERR(( "xsk sendto failed xsk_fd=%d (%i-%s)", xsk->xsk_fd, errno, fd_io_strerror( errno ) ));
463 0 : }
464 0 : if( FD_UNLIKELY( errno!=EAGAIN ) ) {
465 0 : long ts = fd_log_wallclock();
466 0 : if( ts > xsk->log_suppress_until_ns ) {
467 0 : FD_LOG_WARNING(( "xsk sendto failed xsk_fd=%d (%i-%s)", xsk->xsk_fd, errno, fd_io_strerror( errno ) ));
468 0 : xsk->log_suppress_until_ns = ts + (long)1e9;
469 0 : }
470 0 : }
471 0 : }
472 0 : ctx->metrics.xsk_tx_wakeup_cnt++;
473 0 : }
474 :
475 : /* net_tx_periodic_wakeup does a timer based xsk_sendmsg wakeup. */
476 :
477 : static inline int
478 : net_tx_periodic_wakeup( fd_net_ctx_t * ctx,
479 : uint xsk_idx,
480 : long now,
481 18 : int * charge_busy ) {
482 18 : uint tx_prod = FD_VOLATILE_CONST( *ctx->xsk[ xsk_idx ].ring_tx.prod );
483 18 : uint tx_cons = FD_VOLATILE_CONST( *ctx->xsk[ xsk_idx ].ring_tx.cons );
484 18 : int tx_ring_empty = tx_prod==tx_cons;
485 18 : if( fd_net_flusher_check( ctx->tx_flusher+xsk_idx, now, tx_ring_empty ) ) {
486 15 : net_tx_wakeup( ctx, &ctx->xsk[ xsk_idx ], charge_busy );
487 15 : fd_net_flusher_wakeup( ctx->tx_flusher+xsk_idx, now );
488 15 : }
489 18 : return 0;
490 18 : }
491 :
492 : static void
493 0 : during_housekeeping( fd_net_ctx_t * ctx ) {
494 0 : long now = fd_tickcount();
495 0 : net_load_netdev_tbl( ctx );
496 0 : ctx->has_gre_interface = net_check_gre_interface_exists( ctx );
497 :
498 0 : ctx->metrics.rx_busy_cnt = 0UL;
499 0 : ctx->metrics.rx_idle_cnt = 0UL;
500 0 : ctx->metrics.tx_busy_cnt = 0UL;
501 0 : ctx->metrics.tx_idle_cnt = fd_seq_diff( ctx->free_tx.prod, ctx->free_tx.cons );
502 0 : for( uint j=0U; j<ctx->xsk_cnt; j++ ) {
503 0 : fd_xsk_t * xsk = &ctx->xsk[ j ];
504 : /* Refresh all sequence numbers (consumer first, then producer) */
505 0 : FD_COMPILER_MFENCE();
506 0 : xsk->ring_fr.cached_cons = FD_VOLATILE_CONST( *xsk->ring_fr.cons );
507 0 : xsk->ring_fr.cached_prod = FD_VOLATILE_CONST( *xsk->ring_fr.prod );
508 0 : xsk->ring_rx.cached_cons = FD_VOLATILE_CONST( *xsk->ring_rx.cons );
509 0 : xsk->ring_rx.cached_prod = FD_VOLATILE_CONST( *xsk->ring_rx.prod );
510 0 : xsk->ring_tx.cached_cons = FD_VOLATILE_CONST( *xsk->ring_tx.cons );
511 0 : xsk->ring_tx.cached_prod = FD_VOLATILE_CONST( *xsk->ring_tx.prod );
512 0 : xsk->ring_cr.cached_cons = FD_VOLATILE_CONST( *xsk->ring_cr.cons );
513 0 : xsk->ring_cr.cached_prod = FD_VOLATILE_CONST( *xsk->ring_cr.prod );
514 0 : FD_COMPILER_MFENCE();
515 0 : ctx->metrics.rx_busy_cnt += (long)(int)( xsk->ring_rx.cached_prod - xsk->ring_rx.cached_cons );
516 0 : ctx->metrics.rx_idle_cnt += (long)(int)( xsk->ring_fr.cached_prod - xsk->ring_fr.cached_cons );
517 0 : ctx->metrics.tx_busy_cnt += (long)(int)( xsk->ring_tx.cached_prod - xsk->ring_tx.cached_cons );
518 0 : ctx->metrics.tx_busy_cnt += (long)(int)( xsk->ring_cr.cached_prod - xsk->ring_cr.cached_cons );
519 0 : }
520 :
521 0 : if( now > ctx->next_xdp_stats_refresh ) {
522 0 : ctx->next_xdp_stats_refresh = now + ctx->xdp_stats_interval_ticks;
523 0 : poll_xdp_statistics( ctx );
524 0 : }
525 0 : }
526 :
527 :
528 : /* net_tx_route resolves the xsk index, src ip address, src MAC address, and
529 : dst MAC address. Returns 1 on success, 0 on failure.
530 : On success, tx_op->{xsk_idx,src_ip,mac_addrs} is set, and if the dst_ip
531 : belongs to a GRE interface, is_gre_inf will set to 1 and
532 : tx_op->{gre_outer_src_ip, gre_outer_dst_ip} will be loaded from the netdev
533 : table. is_gre_inf is set to 0 if dst_ip doesn't belong to a GRE interface. */
534 :
535 : static int
536 : net_tx_route( fd_net_ctx_t * ctx,
537 : uint dst_ip,
538 33 : uint * is_gre_inf ) {
539 :
540 : /* Route lookup */
541 :
542 33 : fd_fib4_hop_t hop[2] = {0};
543 33 : fd_fib4_lookup( ctx->fib_local, hop+0, dst_ip, 0UL );
544 33 : fd_fib4_lookup( ctx->fib_main, hop+1, dst_ip, 0UL );
545 33 : fd_fib4_hop_t const * next_hop = fd_fib4_hop_or( hop+0, hop+1 );
546 :
547 33 : uint rtype = next_hop->rtype;
548 33 : uint if_idx = next_hop->if_idx;
549 33 : uint ip4_src = next_hop->ip4_src;
550 :
551 33 : if( FD_UNLIKELY( rtype==FD_FIB4_RTYPE_LOCAL ) ) {
552 0 : rtype = FD_FIB4_RTYPE_UNICAST;
553 0 : if_idx = 1;
554 0 : }
555 :
556 33 : if( FD_UNLIKELY( rtype!=FD_FIB4_RTYPE_UNICAST ) ) {
557 0 : ctx->metrics.tx_route_fail_cnt++;
558 0 : return 0;
559 0 : }
560 :
561 33 : fd_netdev_t * netdev = net_query_netdev_tbl( ctx, if_idx );
562 33 : if( !netdev ) {
563 3 : ctx->metrics.tx_route_fail_cnt++;
564 3 : return 0;
565 3 : }
566 :
567 30 : ip4_src = fd_uint_if( !!ctx->bind_address, ctx->bind_address, ip4_src );
568 30 : ctx->tx_op.src_ip = ip4_src;
569 30 : ctx->tx_op.xsk_idx = UINT_MAX;
570 :
571 30 : FD_TEST( is_gre_inf );
572 30 : *is_gre_inf = 0;
573 30 : if( netdev->dev_type==ARPHRD_LOOPBACK ) {
574 : /* Set Ethernet src and dst address to 00:00:00:00:00:00 */
575 0 : memset( ctx->tx_op.mac_addrs, 0, 12UL );
576 0 : ctx->tx_op.xsk_idx = XSK_IDX_LO;
577 : /* Set preferred src address to 127.0.0.1 if no bind address is set */
578 0 : if( !ctx->tx_op.src_ip ) ctx->tx_op.src_ip = FD_IP4_ADDR( 127,0,0,1 );
579 0 : return 1;
580 30 : } else if( netdev->dev_type==ARPHRD_IPGRE ) {
581 : /* skip MAC addrs lookup for GRE inner dst ip */
582 12 : if( netdev->gre_src_ip ) ctx->tx_op.gre_outer_src_ip = netdev->gre_src_ip;
583 12 : ctx->tx_op.gre_outer_dst_ip = netdev->gre_dst_ip;
584 12 : *is_gre_inf = 1;
585 12 : return 1;
586 12 : }
587 :
588 18 : if( FD_UNLIKELY( netdev->dev_type!=ARPHRD_ETHER ) ) return 0; // drop
589 :
590 18 : if( FD_UNLIKELY( if_idx!=ctx->xsk[ XSK_IDX_MAIN ].if_idx ) ) {
591 0 : ctx->metrics.tx_no_xdp_cnt++;
592 0 : return 0;
593 0 : }
594 18 : ctx->tx_op.xsk_idx = XSK_IDX_MAIN;
595 :
596 : /* Neighbor resolve */
597 18 : uint neigh_ip = next_hop->ip4_gw;
598 18 : if( !neigh_ip ) neigh_ip = dst_ip;
599 :
600 18 : fd_neigh4_hmap_query_t neigh_query[1];
601 18 : int neigh_res = fd_neigh4_hmap_query_try( ctx->neigh4, &neigh_ip, NULL, neigh_query, 0 );
602 18 : if( FD_UNLIKELY( neigh_res!=FD_MAP_SUCCESS ) ) {
603 : /* Neighbor not found */
604 0 : fd_netlink_neigh4_solicit( ctx->neigh4_solicit, neigh_ip, if_idx, fd_frag_meta_ts_comp( fd_tickcount() ) );
605 0 : ctx->metrics.tx_neigh_fail_cnt++;
606 0 : return 0;
607 0 : }
608 18 : fd_neigh4_entry_t const * neigh = fd_neigh4_hmap_query_ele_const( neigh_query );
609 18 : if( FD_UNLIKELY( neigh->state != FD_NEIGH4_STATE_ACTIVE ) ) {
610 0 : ctx->metrics.tx_neigh_fail_cnt++;
611 0 : return 0;
612 0 : }
613 18 : ip4_src = fd_uint_if( !ip4_src, ctx->default_address, ip4_src );
614 18 : ctx->tx_op.src_ip = ip4_src;
615 18 : memcpy( ctx->tx_op.mac_addrs+0, neigh->mac_addr, 6 );
616 18 : memcpy( ctx->tx_op.mac_addrs+6, netdev->mac_addr, 6 );
617 :
618 18 : if( FD_UNLIKELY( fd_neigh4_hmap_query_test( neigh_query ) ) ) {
619 0 : ctx->metrics.tx_neigh_fail_cnt++;
620 0 : return 0;
621 0 : }
622 :
623 18 : return 1;
624 18 : }
625 :
626 : /* before_frag is called when a new metadata descriptor for a TX job is
627 : found. This callback determines whether this net tile is responsible
628 : for the TX job. If so, it prepares the TX op for the during_frag and
629 : after_frag callbacks. */
630 :
631 : static inline int
632 : before_frag( fd_net_ctx_t * ctx,
633 : ulong in_idx,
634 : ulong seq,
635 18 : ulong sig ) {
636 18 : (void)in_idx; (void)seq;
637 :
638 : /* Find interface index of next packet */
639 18 : ulong proto = fd_disco_netmux_sig_proto( sig );
640 18 : if( FD_UNLIKELY( proto!=DST_PROTO_OUTGOING ) ) return 1;
641 :
642 : /* Load balance TX */
643 18 : uint net_tile_cnt = ctx->net_tile_cnt;
644 18 : uint hash = (uint)fd_disco_netmux_sig_hash( sig );
645 18 : uint target_idx = hash % net_tile_cnt;
646 18 : uint net_tile_id = ctx->net_tile_id;
647 18 : uint dst_ip = fd_disco_netmux_sig_dst_ip( sig );
648 :
649 18 : ctx->tx_op.use_gre = 0;
650 18 : ctx->tx_op.gre_outer_dst_ip = 0;
651 18 : ctx->tx_op.gre_outer_src_ip = 0;
652 18 : uint is_gre_inf = 0;
653 :
654 18 : if( FD_UNLIKELY( !net_tx_route( ctx, dst_ip, &is_gre_inf ) ) ) {
655 0 : return 1; /* metrics incremented by net_tx_route */
656 0 : }
657 :
658 18 : uint xsk_idx = ctx->tx_op.xsk_idx;
659 :
660 18 : if( is_gre_inf ) {
661 12 : uint inner_src_ip = ctx->tx_op.src_ip;
662 12 : if( FD_UNLIKELY( !inner_src_ip ) ) {
663 0 : ctx->metrics.tx_gre_route_fail_cnt++;
664 0 : return 1;
665 0 : }
666 : /* Find the MAC addrs for the eth hdr, and src ip for outer ip4 hdr if not found in netdev tbl */
667 12 : ctx->tx_op.src_ip = 0;
668 12 : is_gre_inf = 0;
669 12 : if( FD_UNLIKELY( !net_tx_route( ctx, ctx->tx_op.gre_outer_dst_ip, &is_gre_inf ) ) ) {
670 0 : ctx->metrics.tx_gre_route_fail_cnt++;
671 0 : return 1;
672 0 : }
673 12 : if( is_gre_inf ) {
674 : /* Only one layer of tunnelling supported */
675 0 : ctx->metrics.tx_gre_route_fail_cnt++;
676 0 : return 1;
677 0 : }
678 12 : if( !ctx->tx_op.gre_outer_src_ip ) {
679 6 : ctx->tx_op.gre_outer_src_ip = ctx->tx_op.src_ip;
680 6 : }
681 12 : ctx->tx_op.use_gre = 1; /* indicate to during_frag to use GRE header */
682 12 : ctx->tx_op.src_ip = inner_src_ip;
683 12 : xsk_idx = XSK_IDX_MAIN;
684 12 : }
685 :
686 18 : if( FD_UNLIKELY( xsk_idx>=ctx->xsk_cnt ) ) {
687 : /* Packet does not route to an XDP interface */
688 0 : ctx->metrics.tx_no_xdp_cnt++;
689 0 : return 1;
690 0 : }
691 :
692 18 : if( xsk_idx==XSK_IDX_LO ) target_idx = 0; /* loopback always targets tile 0 */
693 :
694 : /* Skip if another net tile is responsible for this packet */
695 :
696 18 : if( net_tile_id!=target_idx ) return 1; /* ignore */
697 :
698 : /* Skip if TX is blocked */
699 :
700 18 : if( FD_UNLIKELY( !net_tx_ready( ctx, xsk_idx ) ) ) {
701 0 : ctx->metrics.tx_full_fail_cnt++;
702 0 : return 1;
703 0 : }
704 :
705 : /* Allocate buffer for receive */
706 :
707 18 : fd_net_free_ring_t * free = &ctx->free_tx;
708 18 : ulong alloc_seq = free->cons;
709 18 : void * frame = (void *)free->queue[ alloc_seq % free->depth ];
710 18 : free->cons = fd_seq_inc( alloc_seq, 1UL );
711 :
712 18 : ctx->tx_op.frame = frame;
713 :
714 18 : return 0; /* continue */
715 18 : }
716 :
717 : /* during_frag is called when before_frag has committed to transmit an
718 : outgoing packet. */
719 :
720 : static inline void
721 : during_frag( fd_net_ctx_t * ctx,
722 : ulong in_idx,
723 : ulong seq FD_PARAM_UNUSED,
724 : ulong sig FD_PARAM_UNUSED,
725 : ulong chunk,
726 : ulong sz,
727 18 : ulong ctl FD_PARAM_UNUSED ) {
728 18 : if( FD_UNLIKELY( chunk<ctx->in[ in_idx ].chunk0 || chunk>ctx->in[ in_idx ].wmark || sz>FD_NET_MTU ) )
729 0 : FD_LOG_ERR(( "chunk %lu %lu corrupt, not in range [%lu,%lu]", chunk, sz, ctx->in[ in_idx ].chunk0, ctx->in[ in_idx ].wmark ));
730 :
731 18 : if( FD_UNLIKELY( sz<( sizeof(fd_eth_hdr_t)+sizeof(fd_ip4_hdr_t) ) ) )
732 0 : FD_LOG_ERR(( "packet too small %lu (in_idx=%lu)", sz, in_idx ));
733 :
734 18 : if( FD_UNLIKELY( sz>FD_ETH_PAYLOAD_MAX ) )
735 0 : FD_LOG_ERR(( "packet too big %lu (in_idx=%lu)", sz, in_idx ));
736 :
737 18 : void * frame = ctx->tx_op.frame;
738 18 : if( FD_UNLIKELY( (ulong)frame < (ulong)ctx->umem_frame0 ) )
739 0 : FD_LOG_ERR(( "frame %p out of bounds (below %p)", frame, (void *)ctx->umem_frame0 ));
740 18 : ulong umem_off = (ulong)frame - (ulong)ctx->umem_frame0;
741 18 : if( FD_UNLIKELY( (ulong)umem_off > (ulong)ctx->umem_sz ) )
742 0 : FD_LOG_ERR(( "frame %p out of bounds (beyond %p)", frame, (void *)ctx->umem_sz ));
743 :
744 : /* Speculatively copy frame into XDP buffer */
745 18 : uchar const * src = fd_chunk_to_laddr_const( ctx->in[ in_idx ].mem, chunk );
746 :
747 18 : if( ctx->tx_op.use_gre ) {
748 : /* Discard the ethernet hdr from src. Copy the rest to where the inner ip4_hdr is.
749 : Safe from overflow: FD_ETH_PAYLOAD_MAX + header overhead < frame size (2048UL) */
750 12 : ulong overhead = sizeof(fd_eth_hdr_t) + sizeof(fd_ip4_hdr_t) + sizeof(fd_gre_hdr_t);
751 12 : fd_memcpy( (void *)( (ulong)ctx->tx_op.frame + overhead ), src + sizeof(fd_eth_hdr_t), sz - sizeof(fd_eth_hdr_t) );
752 12 : } else {
753 6 : fd_memcpy( ctx->tx_op.frame, src, sz );
754 6 : }
755 18 : }
756 :
757 : /* after_frag is called when the during_frag memcpy was _not_ overrun. */
758 :
759 : static void
760 : after_frag( fd_net_ctx_t * ctx,
761 : ulong in_idx,
762 : ulong seq,
763 : ulong sig,
764 : ulong sz,
765 : ulong tsorig,
766 : ulong tspub,
767 18 : fd_stem_context_t * stem ) {
768 18 : (void)in_idx; (void)seq; (void)sig; (void)tsorig; (void)tspub; (void)stem;
769 :
770 : /* Current send operation */
771 :
772 18 : uchar * frame = ctx->tx_op.frame;
773 18 : uint xsk_idx = ctx->tx_op.xsk_idx;
774 :
775 : /* Select Ethernet addresses */
776 18 : memcpy( frame, ctx->tx_op.mac_addrs, 12 );
777 :
778 18 : uchar * iphdr = frame + sizeof(fd_eth_hdr_t);
779 :
780 18 : if( ctx->tx_op.use_gre ) {
781 :
782 : /* For GRE packets, the ethertype will always be FD_ETH_HDR_TYPE_IP. outer source ip can't be 0 */
783 12 : if( FD_UNLIKELY( ctx->tx_op.gre_outer_src_ip==0 ) ) {
784 0 : ctx->metrics.tx_gre_route_fail_cnt++;
785 0 : return;
786 0 : }
787 :
788 : /* Write the last two bytes for eth_hdr */
789 12 : FD_STORE( ushort, frame+12, fd_ushort_bswap( FD_ETH_HDR_TYPE_IP ) );
790 :
791 12 : uchar * outer_iphdr = frame + sizeof(fd_eth_hdr_t);
792 12 : uchar * gre_hdr = outer_iphdr + sizeof(fd_ip4_hdr_t);
793 12 : uchar * inner_iphdr = gre_hdr + sizeof(fd_gre_hdr_t);
794 :
795 : /* outer hdr + gre hdr + inner net_tot_len */
796 12 : ushort outer_net_tot_len = (ushort)( sizeof(fd_ip4_hdr_t) + sizeof(fd_gre_hdr_t) + fd_ushort_bswap( ( (fd_ip4_hdr_t *)inner_iphdr )->net_tot_len ) );
797 :
798 : /* Construct outer ip header */
799 12 : fd_ip4_hdr_t ip4_outer = (fd_ip4_hdr_t) {
800 12 : .verihl = FD_IP4_VERIHL( 4,5 ),
801 12 : .tos = 0,
802 12 : .net_tot_len = fd_ushort_bswap( outer_net_tot_len ),
803 12 : .net_id = 0,
804 12 : .net_frag_off = fd_ushort_bswap( FD_IP4_HDR_FRAG_OFF_DF ),
805 12 : .ttl = 64,
806 12 : .protocol = FD_IP4_HDR_PROTOCOL_GRE,
807 12 : .check = 0,
808 12 : .saddr = ctx->tx_op.gre_outer_src_ip,
809 12 : .daddr = ctx->tx_op.gre_outer_dst_ip,
810 12 : };
811 12 : ip4_outer.check = fd_ip4_hdr_check_fast( &ip4_outer );
812 12 : FD_STORE( fd_ip4_hdr_t, outer_iphdr, ip4_outer );
813 :
814 : /* Construct gre header */
815 12 : fd_gre_hdr_t gre_hdr_ = {
816 12 : .flags_version = FD_GRE_HDR_FLG_VER_BASIC,
817 12 : .protocol = fd_ushort_bswap( FD_ETH_HDR_TYPE_IP )
818 12 : };
819 12 : FD_STORE( fd_gre_hdr_t, gre_hdr, gre_hdr_ );
820 :
821 12 : iphdr = inner_iphdr;
822 12 : sz = sizeof(fd_eth_hdr_t) + outer_net_tot_len;
823 12 : xsk_idx = 0;
824 12 : }
825 :
826 : /* Construct (inner) ip header */
827 18 : uint ihl = FD_IP4_GET_LEN( *(fd_ip4_hdr_t *)iphdr );
828 18 : uint ver = FD_IP4_GET_VERSION( *(fd_ip4_hdr_t *)iphdr );
829 18 : uint ip4_saddr = FD_LOAD( uint, iphdr+12 );
830 18 : ushort ethertype = FD_LOAD( ushort, frame+12 );
831 18 : if( ethertype==fd_ushort_bswap( FD_ETH_HDR_TYPE_IP ) && ver!=0x4 ) {
832 0 : ctx->metrics.tx_route_fail_cnt++; // Not an IPv4 packet. drop
833 0 : return;
834 0 : }
835 :
836 18 : if( ethertype==fd_ushort_bswap( FD_ETH_HDR_TYPE_IP ) && ip4_saddr==0 ) {
837 18 : if( FD_UNLIKELY( ctx->tx_op.src_ip==0 ||
838 18 : ihl<sizeof(fd_ip4_hdr_t) ||
839 18 : (sizeof(fd_eth_hdr_t)+ihl)>sz ) ) {
840 : /* Outgoing IPv4 packet with unknown src IP or invalid IHL */
841 : /* FIXME should select first IPv4 address of device table here */
842 0 : ctx->metrics.tx_route_fail_cnt++;
843 0 : return;
844 0 : }
845 : /* Recompute checksum after changing header */
846 18 : FD_STORE( uint, iphdr+12, ctx->tx_op.src_ip );
847 18 : FD_STORE( ushort, iphdr+10, 0 );
848 18 : FD_STORE( ushort, iphdr+10, fd_ip4_hdr_check( iphdr ) );
849 18 : }
850 :
851 : /* Submit packet TX job
852 :
853 : Invariant for ring_tx: prod-cons<length
854 : (This invariant breaks if any other packet is sent over this ring
855 : between before_frag and this point, e.g. send_arp_probe.) */
856 :
857 :
858 18 : fd_xsk_t * xsk = &ctx->xsk[ xsk_idx ];
859 18 : fd_xdp_ring_t * tx_ring = &xsk->ring_tx;
860 18 : uint tx_seq = FD_VOLATILE_CONST( *tx_ring->prod );
861 18 : uint tx_mask = tx_ring->depth - 1U;
862 18 : xsk->ring_tx.packet_ring[ tx_seq&tx_mask ] = (struct xdp_desc) {
863 18 : .addr = (ulong)frame - (ulong)ctx->umem_frame0,
864 18 : .len = (uint)sz,
865 18 : .options = 0
866 18 : };
867 :
868 : /* Frame is now owned by kernel. Clear tx_op. */
869 18 : ctx->tx_op.frame = NULL;
870 :
871 : /* Register newly enqueued packet */
872 18 : FD_VOLATILE( *xsk->ring_tx.prod ) = tx_ring->cached_prod = tx_seq+1U;
873 18 : ctx->metrics.tx_submit_cnt++;
874 18 : ctx->metrics.tx_bytes_total += sz;
875 18 : if( ctx->tx_op.use_gre ) ctx->metrics.tx_gre_cnt++;
876 18 : fd_net_flusher_inc( ctx->tx_flusher+xsk_idx, fd_tickcount() );
877 :
878 18 : }
879 :
880 : /* net_rx_packet is called when a new Ethernet frame is available.
881 : Attempts to copy out the frame to a downstream tile. */
882 :
883 : static void
884 : net_rx_packet( fd_net_ctx_t * ctx,
885 : ulong umem_off,
886 : ulong sz,
887 18 : uint * freed_chunk ) {
888 :
889 18 : if( FD_UNLIKELY( sz<sizeof(fd_eth_hdr_t)+sizeof(fd_ip4_hdr_t)+sizeof(fd_udp_hdr_t) ) ) {
890 0 : FD_DTRACE_PROBE( net_tile_err_rx_undersz );
891 0 : ctx->metrics.rx_undersz_cnt++;
892 0 : return;
893 0 : }
894 :
895 18 : uchar * packet = (uchar *)ctx->umem_frame0 + umem_off;
896 18 : uchar const * packet_end = packet + sz;
897 18 : fd_ip4_hdr_t * iphdr = (fd_ip4_hdr_t *)(packet + sizeof(fd_eth_hdr_t));
898 :
899 18 : if( FD_UNLIKELY( ((fd_eth_hdr_t *)packet)->net_type!=fd_ushort_bswap( FD_ETH_HDR_TYPE_IP ) ) ) return;
900 :
901 18 : int is_packet_gre = 0;
902 : /* Discard the GRE overhead (outer iphdr and gre hdr) */
903 18 : if( iphdr->protocol == FD_IP4_HDR_PROTOCOL_GRE ) {
904 12 : if( FD_UNLIKELY( ctx->has_gre_interface==0 ) ) {
905 0 : ctx->metrics.rx_gre_ignored_cnt++; // drop. No gre interface in netdev table
906 0 : return;
907 0 : }
908 12 : if( FD_UNLIKELY( FD_IP4_GET_VERSION( *iphdr )!=0x4 ) ) {
909 0 : ctx->metrics.rx_gre_inv_pkt_cnt++; // drop. IP version!=IPv4
910 0 : return;
911 0 : }
912 :
913 12 : ulong overhead = FD_IP4_GET_LEN( *iphdr ) + sizeof(fd_gre_hdr_t);
914 :
915 12 : if( FD_UNLIKELY( (uchar *)iphdr+overhead+sizeof(fd_ip4_hdr_t)>packet_end ) ) {
916 0 : FD_DTRACE_PROBE( net_tile_err_rx_undersz );
917 0 : ctx->metrics.rx_undersz_cnt++; // inner ip4 header invalid
918 0 : return;
919 0 : }
920 :
921 : /* The new iphdr is where the inner iphdr was. Copy over the eth_hdr */
922 12 : iphdr = (fd_ip4_hdr_t *)((uchar *)iphdr + overhead);
923 12 : uchar * new_packet = (uchar *)iphdr - sizeof(fd_eth_hdr_t);
924 12 : fd_memcpy( new_packet, packet, sizeof(fd_eth_hdr_t) );
925 12 : sz -= overhead;
926 12 : packet = new_packet;
927 12 : umem_off = (ulong)( packet - (uchar *)ctx->umem_frame0 );
928 12 : is_packet_gre = 1;
929 12 : }
930 :
931 : /* Translate packet to UMEM frame index */
932 18 : ulong chunk = ctx->umem_chunk0 + (umem_off>>FD_CHUNK_LG_SZ);
933 18 : ulong ctl = umem_off & 0x3fUL;
934 :
935 : /* Filter for UDP/IPv4 packets. */
936 18 : if( FD_UNLIKELY( ( FD_IP4_GET_VERSION( *iphdr )!=0x4 ) ||
937 18 : ( iphdr->protocol!=FD_IP4_HDR_PROTOCOL_UDP ) ) ) return;
938 :
939 : /* IPv4 is variable-length, so lookup IHL to find start of UDP */
940 18 : uint iplen = FD_IP4_GET_LEN( *iphdr );
941 18 : uchar const * udp = (uchar *)iphdr + iplen;
942 :
943 18 : if( FD_UNLIKELY( udp+sizeof(fd_udp_hdr_t) > packet_end ) ) {
944 0 : FD_DTRACE_PROBE( net_tile_err_rx_undersz );
945 0 : ctx->metrics.rx_undersz_cnt++;
946 0 : return;
947 0 : }
948 :
949 : /* Extract IP dest addr and UDP src/dest port */
950 18 : fd_udp_hdr_t * udp_hdr = (fd_udp_hdr_t *)udp;
951 18 : uint ip_srcaddr = iphdr->saddr;
952 18 : ushort udp_srcport = fd_ushort_bswap( udp_hdr->net_sport );
953 18 : ushort udp_dstport = fd_ushort_bswap( udp_hdr->net_dport );
954 :
955 18 : FD_DTRACE_PROBE_4( net_tile_pkt_rx, ip_srcaddr, udp_srcport, udp_dstport, sz );
956 :
957 : /* Route packet to downstream tile */
958 18 : ushort proto;
959 18 : fd_net_out_ctx_t * out;
960 18 : if( FD_UNLIKELY( udp_dstport==ctx->shred_listen_port ) ) {
961 18 : proto = DST_PROTO_SHRED;
962 18 : out = ctx->shred_out;
963 18 : } else if( FD_UNLIKELY( udp_dstport==ctx->quic_transaction_listen_port ) ) {
964 0 : proto = DST_PROTO_TPU_QUIC;
965 0 : out = ctx->quic_out;
966 0 : } else if( FD_UNLIKELY( udp_dstport==ctx->legacy_transaction_listen_port ) ) {
967 0 : proto = DST_PROTO_TPU_UDP;
968 0 : out = ctx->quic_out;
969 0 : } else if( FD_UNLIKELY( udp_dstport==ctx->gossip_listen_port ) ) {
970 0 : proto = DST_PROTO_GOSSIP;
971 0 : out = ctx->gossip_out;
972 0 : } else if( FD_UNLIKELY( udp_dstport==ctx->repair_intake_listen_port ) ) {
973 0 : proto = DST_PROTO_REPAIR;
974 0 : if( FD_UNLIKELY( sz == REPAIR_PING_SZ ) ) out = ctx->repair_out; /* ping-pong */
975 0 : else out = ctx->shred_out;
976 0 : } else if( FD_UNLIKELY( udp_dstport==ctx->repair_serve_listen_port ) ) {
977 0 : proto = DST_PROTO_REPAIR;
978 0 : out = ctx->repair_out;
979 0 : } else if( FD_UNLIKELY( udp_dstport==ctx->send_src_port ) ) {
980 0 : proto = DST_PROTO_SEND;
981 0 : out = ctx->send_out;
982 0 : } else {
983 :
984 0 : FD_LOG_ERR(( "Firedancer received a UDP packet on port %hu which was not expected. "
985 0 : "Only the following ports should be configured to forward packets: "
986 0 : "%hu, %hu, %hu, %hu, %hu, %hu (excluding any 0 ports, which can be ignored)."
987 0 : "Please report this error to Firedancer maintainers.",
988 0 : udp_dstport,
989 0 : ctx->shred_listen_port,
990 0 : ctx->quic_transaction_listen_port,
991 0 : ctx->legacy_transaction_listen_port,
992 0 : ctx->gossip_listen_port,
993 0 : ctx->repair_intake_listen_port,
994 0 : ctx->repair_serve_listen_port ));
995 0 : }
996 :
997 : /* tile can decide how to partition based on src ip addr and src port */
998 18 : ulong sig = fd_disco_netmux_sig( ip_srcaddr, udp_srcport, 0U, proto, 14UL+8UL+iplen );
999 :
1000 : /* Peek the mline for an old frame */
1001 18 : fd_frag_meta_t * mline = out->mcache + fd_mcache_line_idx( out->seq, out->depth );
1002 18 : *freed_chunk = mline->chunk;
1003 :
1004 : /* Overwrite the mline with the new frame */
1005 18 : ulong tspub = (ulong)fd_frag_meta_ts_comp( fd_tickcount() );
1006 18 : fd_mcache_publish( out->mcache, out->depth, out->seq, sig, chunk, sz, ctl, 0, tspub );
1007 :
1008 : /* Wind up for the next iteration */
1009 18 : out->seq = fd_seq_inc( out->seq, 1UL );
1010 :
1011 18 : if( is_packet_gre ) ctx->metrics.rx_gre_cnt++;
1012 18 : ctx->metrics.rx_pkt_cnt++;
1013 18 : ctx->metrics.rx_bytes_total += sz;
1014 18 : }
1015 :
1016 : /* net_comp_event is called when an XDP TX frame is free again. */
1017 :
1018 : static void
1019 : net_comp_event( fd_net_ctx_t * ctx,
1020 : fd_xsk_t * xsk,
1021 0 : uint comp_seq ) {
1022 :
1023 : /* Locate the incoming frame */
1024 :
1025 0 : fd_xdp_ring_t * comp_ring = &xsk->ring_cr;
1026 0 : uint comp_mask = comp_ring->depth - 1U;
1027 0 : ulong frame = FD_VOLATILE_CONST( comp_ring->frame_ring[ comp_seq&comp_mask ] );
1028 0 : ulong const frame_mask = FD_NET_MTU - 1UL;
1029 0 : if( FD_UNLIKELY( frame+FD_NET_MTU > ctx->umem_sz ) ) {
1030 0 : FD_LOG_ERR(( "Bounds check failed: frame=0x%lx umem_sz=0x%lx",
1031 0 : frame, (ulong)ctx->umem_sz ));
1032 0 : }
1033 :
1034 : /* Check if we have space to return the freed frame */
1035 :
1036 0 : fd_net_free_ring_t * free = &ctx->free_tx;
1037 0 : ulong free_prod = free->prod;
1038 0 : ulong free_mask = free->depth - 1UL;
1039 0 : long free_cnt = fd_seq_diff( free_prod, free->cons );
1040 0 : if( FD_UNLIKELY( free_cnt>=(long)free->depth ) ) return; /* blocked */
1041 :
1042 0 : free->queue[ free_prod&free_mask ] = (ulong)ctx->umem_frame0 + (frame & (~frame_mask));
1043 0 : free->prod = fd_seq_inc( free_prod, 1UL );
1044 :
1045 : /* Wind up for next iteration */
1046 :
1047 0 : FD_VOLATILE( *comp_ring->cons ) = comp_ring->cached_cons = comp_seq+1U;
1048 :
1049 0 : ctx->metrics.tx_complete_cnt++;
1050 :
1051 0 : }
1052 :
1053 : /* net_rx_event is called when a new XDP RX frame is available. Calls
1054 : net_rx_packet, then returns the packet back to the kernel via the fill
1055 : ring. */
1056 :
1057 : static void
1058 : net_rx_event( fd_net_ctx_t * ctx,
1059 : fd_xsk_t * xsk,
1060 18 : uint rx_seq ) {
1061 : /* Locate the incoming frame */
1062 :
1063 18 : fd_xdp_ring_t * rx_ring = &xsk->ring_rx;
1064 18 : uint rx_mask = rx_ring->depth - 1U;
1065 18 : struct xdp_desc frame = FD_VOLATILE_CONST( rx_ring->packet_ring[ rx_seq&rx_mask ] );
1066 :
1067 18 : if( FD_UNLIKELY( frame.len>FD_NET_MTU ) )
1068 0 : FD_LOG_ERR(( "received a UDP packet with a too large payload (%u)", frame.len ));
1069 :
1070 : /* Check if we have space in the fill ring to free the frame */
1071 :
1072 18 : fd_xdp_ring_t * fill_ring = &xsk->ring_fr;
1073 18 : uint fill_depth = fill_ring->depth;
1074 18 : uint fill_mask = fill_depth-1U;
1075 18 : ulong frame_mask = FD_NET_MTU - 1UL;
1076 18 : uint fill_prod = FD_VOLATILE_CONST( *fill_ring->prod );
1077 18 : uint fill_cons = FD_VOLATILE_CONST( *fill_ring->cons );
1078 :
1079 18 : if( FD_UNLIKELY( (int)(fill_prod-fill_cons) >= (int)fill_depth ) ) {
1080 0 : ctx->metrics.rx_fill_blocked_cnt++;
1081 0 : return; /* blocked */
1082 0 : }
1083 :
1084 : /* Pass it to the receive handler */
1085 :
1086 18 : uint freed_chunk = UINT_MAX;
1087 18 : net_rx_packet( ctx, frame.addr, frame.len, &freed_chunk );
1088 :
1089 18 : FD_COMPILER_MFENCE();
1090 18 : FD_VOLATILE( *rx_ring->cons ) = rx_ring->cached_cons = rx_seq+1U;
1091 :
1092 : /* If this mcache publish shadowed a previous publish, mark the old
1093 : frame as free. */
1094 :
1095 18 : if( FD_LIKELY( freed_chunk!=UINT_MAX ) ) {
1096 18 : if( FD_UNLIKELY( ( freed_chunk < ctx->umem_chunk0 ) |
1097 18 : ( freed_chunk > ctx->umem_wmark ) ) ) {
1098 0 : FD_LOG_CRIT(( "mcache corruption detected: chunk=%u chunk0=%u wmark=%u",
1099 0 : freed_chunk, ctx->umem_chunk0, ctx->umem_wmark ));
1100 0 : }
1101 18 : ulong freed_off = (freed_chunk - ctx->umem_chunk0)<<FD_CHUNK_LG_SZ;
1102 18 : fill_ring->frame_ring[ fill_prod&fill_mask ] = freed_off & (~frame_mask);
1103 18 : FD_VOLATILE( *fill_ring->prod ) = fill_ring->cached_prod = fill_prod+1U;
1104 18 : }
1105 :
1106 18 : }
1107 :
1108 : /* before_credit is called every loop iteration. */
1109 :
1110 : static void
1111 : before_credit( fd_net_ctx_t * ctx,
1112 : fd_stem_context_t * stem,
1113 18 : int * charge_busy ) {
1114 18 : (void)stem;
1115 : /* A previous send attempt was overrun. A corrupt copy of the packet was
1116 : placed into an XDP frame, but the frame was not yet submitted to the
1117 : TX ring. Return the tx buffer to the free list. */
1118 :
1119 18 : if( ctx->tx_op.frame ) {
1120 0 : *charge_busy = 1;
1121 0 : fd_net_free_ring_t * free = &ctx->free_tx;
1122 0 : ulong alloc_seq = free->prod;
1123 0 : free->queue[ alloc_seq % free->depth ] = (ulong)ctx->tx_op.frame;
1124 0 : free->prod = fd_seq_inc( alloc_seq, 1UL );
1125 0 : ctx->tx_op.frame = NULL;
1126 0 : }
1127 :
1128 : /* Check if new packets are available or if TX frames are free again
1129 : (Round-robin through sockets) */
1130 :
1131 18 : uint rr_idx = ctx->rr_idx;
1132 18 : fd_xsk_t * rr_xsk = &ctx->xsk[ rr_idx ];
1133 :
1134 18 : net_tx_periodic_wakeup( ctx, rr_idx, fd_tickcount(), charge_busy );
1135 :
1136 18 : uint rx_cons = rr_xsk->ring_rx.cached_cons;
1137 18 : uint rx_prod = FD_VOLATILE_CONST( *rr_xsk->ring_rx.prod );
1138 18 : if( rx_cons!=rx_prod ) {
1139 18 : *charge_busy = 1;
1140 18 : rr_xsk->ring_rx.cached_prod = rx_prod;
1141 18 : net_rx_event( ctx, rr_xsk, rx_cons );
1142 18 : } else {
1143 0 : net_rx_wakeup( ctx, rr_xsk, charge_busy );
1144 0 : ctx->rr_idx++;
1145 0 : ctx->rr_idx = fd_uint_if( ctx->rr_idx>=ctx->xsk_cnt, 0, ctx->rr_idx );
1146 0 : }
1147 :
1148 18 : uint comp_cons = FD_VOLATILE_CONST( *rr_xsk->ring_cr.cons );
1149 18 : uint comp_prod = FD_VOLATILE_CONST( *rr_xsk->ring_cr.prod );
1150 18 : if( comp_cons!=comp_prod ) {
1151 0 : *charge_busy = 1;
1152 0 : rr_xsk->ring_cr.cached_prod = comp_prod;
1153 0 : net_comp_event( ctx, rr_xsk, comp_cons );
1154 0 : }
1155 :
1156 18 : }
1157 :
1158 : /* net_xsk_bootstrap assigns UMEM frames to the FILL ring. */
1159 :
1160 : static ulong
1161 : net_xsk_bootstrap( fd_net_ctx_t * ctx,
1162 : uint xsk_idx,
1163 0 : ulong frame_off ) {
1164 0 : fd_xsk_t * xsk = &ctx->xsk[ xsk_idx ];
1165 :
1166 0 : ulong const frame_sz = FD_NET_MTU;
1167 0 : ulong const fr_depth = ctx->xsk[ xsk_idx ].ring_fr.depth/2UL;
1168 :
1169 0 : fd_xdp_ring_t * fill = &xsk->ring_fr;
1170 0 : uint fill_prod = fill->cached_prod;
1171 0 : for( ulong j=0UL; j<fr_depth; j++ ) {
1172 0 : fill->frame_ring[ j ] = frame_off;
1173 0 : frame_off += frame_sz;
1174 0 : }
1175 0 : FD_VOLATILE( *fill->prod ) = fill->cached_prod = fill_prod + (uint)fr_depth;
1176 :
1177 0 : return frame_off;
1178 0 : }
1179 :
1180 : /* FIXME source MAC address from netlnk tile instead */
1181 :
1182 : static void
1183 : interface_addrs( const char * interface,
1184 : uchar * mac,
1185 0 : uint * ip4_addr ) {
1186 0 : int fd = socket( AF_INET, SOCK_DGRAM, 0 );
1187 0 : struct ifreq ifr;
1188 0 : ifr.ifr_addr.sa_family = AF_INET;
1189 :
1190 0 : strncpy( ifr.ifr_name, interface, IFNAMSIZ );
1191 0 : if( FD_UNLIKELY( ioctl( fd, SIOCGIFHWADDR, &ifr ) ) )
1192 0 : FD_LOG_ERR(( "could not get MAC address of interface `%s`: (%i-%s)", interface, errno, fd_io_strerror( errno ) ));
1193 0 : fd_memcpy( mac, ifr.ifr_hwaddr.sa_data, 6 );
1194 :
1195 0 : if( FD_UNLIKELY( ioctl( fd, SIOCGIFADDR, &ifr ) ) )
1196 0 : FD_LOG_ERR(( "could not get IP address of interface `%s`: (%i-%s)", interface, errno, fd_io_strerror( errno ) ));
1197 0 : *ip4_addr = ((struct sockaddr_in *)fd_type_pun( &ifr.ifr_addr ))->sin_addr.s_addr;
1198 :
1199 0 : if( FD_UNLIKELY( close(fd) ) )
1200 0 : FD_LOG_ERR(( "could not close socket (%i-%s)", errno, fd_io_strerror( errno ) ));
1201 0 : }
1202 :
1203 : /* privileged_init does the following initialization steps:
1204 :
1205 : - Create an AF_XDP socket
1206 : - Map XDP metadata rings
1207 : - Register UMEM data region with socket
1208 : - Insert AF_XDP socket into xsk_map
1209 :
1210 : Net tile 0 also runs fd_xdp_install and repeats the above step for
1211 : the loopback device. (Unless the main interface is already loopback)
1212 :
1213 : Kernel object references:
1214 :
1215 : BPF_LINK file descriptor
1216 : |
1217 : +-> XDP program installation on NIC
1218 : | |
1219 : | +-> XDP program <-- BPF_PROG file descriptor (prog_fd)
1220 : |
1221 : +-> XSKMAP object <-- BPF_MAP file descriptor (xsk_map) */
1222 :
1223 : FD_FN_UNUSED static void
1224 : privileged_init( fd_topo_t * topo,
1225 0 : fd_topo_tile_t * tile ) {
1226 0 : void * scratch = fd_topo_obj_laddr( topo, tile->tile_obj_id );
1227 :
1228 0 : FD_SCRATCH_ALLOC_INIT( l, scratch );
1229 0 : fd_net_ctx_t * ctx = FD_SCRATCH_ALLOC_APPEND( l, alignof(fd_net_ctx_t), sizeof(fd_net_ctx_t) );
1230 0 : ulong * free_tx = FD_SCRATCH_ALLOC_APPEND( l, alignof(ulong), tile->xdp.free_ring_depth * sizeof(ulong) );;
1231 :
1232 0 : fd_memset( ctx, 0, sizeof(fd_net_ctx_t) );
1233 :
1234 0 : uint if_idx = if_nametoindex( tile->xdp.interface );
1235 0 : if( FD_UNLIKELY( !if_idx ) ) FD_LOG_ERR(( "if_nametoindex(%s) failed", tile->xdp.interface ));
1236 :
1237 0 : interface_addrs( tile->xdp.interface, ctx->src_mac_addr, &ctx->default_address );
1238 :
1239 : /* Load up dcache containing UMEM */
1240 :
1241 0 : void * const dcache_mem = fd_topo_obj_laddr( topo, tile->net.umem_dcache_obj_id );
1242 0 : void * const umem_dcache = fd_dcache_join( dcache_mem );
1243 0 : ulong const umem_dcache_data_sz = fd_dcache_data_sz( umem_dcache );
1244 0 : ulong const umem_frame_sz = 2048UL;
1245 :
1246 : /* Left shrink UMEM region to be 4096 byte aligned */
1247 :
1248 0 : void * const umem_frame0 = (void *)fd_ulong_align_up( (ulong)umem_dcache, 4096UL );
1249 0 : ulong umem_sz = umem_dcache_data_sz - ((ulong)umem_frame0 - (ulong)umem_dcache);
1250 0 : umem_sz = fd_ulong_align_dn( umem_sz, umem_frame_sz );
1251 :
1252 : /* Derive chunk bounds */
1253 :
1254 0 : void * const umem_base = fd_wksp_containing( dcache_mem );
1255 0 : ulong const umem_chunk0 = ( (ulong)umem_frame0 - (ulong)umem_base )>>FD_CHUNK_LG_SZ;
1256 0 : ulong const umem_wmark = umem_chunk0 + ( ( umem_sz-umem_frame_sz )>>FD_CHUNK_LG_SZ );
1257 :
1258 0 : if( FD_UNLIKELY( umem_chunk0>UINT_MAX || umem_wmark>UINT_MAX || umem_chunk0>umem_wmark ) ) {
1259 0 : FD_LOG_ERR(( "Calculated invalid UMEM bounds [%lu,%lu]", umem_chunk0, umem_wmark ));
1260 0 : }
1261 :
1262 0 : if( FD_UNLIKELY( !umem_base ) ) FD_LOG_ERR(( "UMEM dcache is not in a workspace" ));
1263 0 : if( FD_UNLIKELY( !umem_dcache ) ) FD_LOG_ERR(( "Failed to join UMEM dcache" ));
1264 :
1265 0 : ctx->umem_frame0 = umem_frame0;
1266 0 : ctx->umem_sz = umem_sz;
1267 0 : ctx->umem_chunk0 = (uint)umem_chunk0;
1268 0 : ctx->umem_wmark = (uint)umem_wmark;
1269 :
1270 0 : ctx->free_tx.queue = free_tx;
1271 0 : ctx->free_tx.depth = tile->xdp.xdp_tx_queue_size;
1272 :
1273 : /* Create and install XSKs */
1274 :
1275 0 : fd_xsk_params_t params0 = {
1276 0 : .if_idx = if_idx,
1277 0 : .if_queue_id = (uint)tile->kind_id,
1278 :
1279 : /* Some kernels produce EOPNOTSUP errors on sendto calls when
1280 : starting up without either XDP_ZEROCOPY or XDP_COPY
1281 : (e.g. 5.14.0-503.23.1.el9_5 with i40e) */
1282 0 : .bind_flags = tile->xdp.zero_copy ? XDP_ZEROCOPY : XDP_COPY,
1283 :
1284 0 : .fr_depth = tile->xdp.xdp_rx_queue_size*2,
1285 0 : .rx_depth = tile->xdp.xdp_rx_queue_size,
1286 0 : .cr_depth = tile->xdp.xdp_tx_queue_size,
1287 0 : .tx_depth = tile->xdp.xdp_tx_queue_size,
1288 :
1289 0 : .umem_addr = umem_frame0,
1290 0 : .frame_sz = umem_frame_sz,
1291 0 : .umem_sz = umem_sz
1292 0 : };
1293 :
1294 0 : int xsk_map_fd = 123462;
1295 0 : ctx->prog_link_fds[ 0 ] = 123463;
1296 : /* Init XSK */
1297 0 : if( FD_UNLIKELY( !fd_xsk_init( &ctx->xsk[ 0 ], ¶ms0 ) ) ) FD_LOG_ERR(( "failed to bind xsk for net tile %lu", tile->kind_id ));
1298 0 : if( FD_UNLIKELY( !fd_xsk_activate( &ctx->xsk[ 0 ], xsk_map_fd ) ) ) FD_LOG_ERR(( "failed to activate xsk for net tile %lu", tile->kind_id ));
1299 0 : ctx->xsk_cnt = 1;
1300 :
1301 0 : if( FD_UNLIKELY( fd_sandbox_gettid()==fd_sandbox_getpid() ) ) {
1302 : /* Kind of gross.. in single threaded mode we don't want to close the xsk_map_fd
1303 : since it's shared with other net tiles. Just check for that by seeing if we
1304 : are the only thread in the process. */
1305 0 : if( FD_UNLIKELY( -1==close( xsk_map_fd ) ) ) FD_LOG_ERR(( "close(%d) failed (%d-%s)", xsk_map_fd, errno, fd_io_strerror( errno ) ));
1306 0 : }
1307 :
1308 : /* Networking tile at index 0 also binds to loopback (only queue 0 available on lo) */
1309 :
1310 0 : if( FD_UNLIKELY( strcmp( tile->xdp.interface, "lo" ) && !tile->kind_id ) ) {
1311 0 : ctx->xsk_cnt = 2;
1312 :
1313 0 : ushort udp_port_candidates[] = {
1314 0 : (ushort)tile->xdp.net.legacy_transaction_listen_port,
1315 0 : (ushort)tile->xdp.net.quic_transaction_listen_port,
1316 0 : (ushort)tile->xdp.net.shred_listen_port,
1317 0 : (ushort)tile->xdp.net.gossip_listen_port,
1318 0 : (ushort)tile->xdp.net.repair_intake_listen_port,
1319 0 : (ushort)tile->xdp.net.repair_serve_listen_port,
1320 0 : (ushort)tile->xdp.net.send_src_port
1321 0 : };
1322 :
1323 0 : uint lo_idx = if_nametoindex( "lo" );
1324 0 : if( FD_UNLIKELY( !lo_idx ) ) FD_LOG_ERR(( "if_nametoindex(lo) failed" ));
1325 :
1326 : /* FIXME move this to fd_topo_run */
1327 0 : fd_xdp_fds_t lo_fds = fd_xdp_install( lo_idx,
1328 0 : tile->net.bind_address,
1329 0 : sizeof(udp_port_candidates)/sizeof(udp_port_candidates[0]),
1330 0 : udp_port_candidates,
1331 0 : "skb" );
1332 :
1333 0 : ctx->prog_link_fds[ 1 ] = lo_fds.prog_link_fd;
1334 : /* init xsk 1 */
1335 0 : fd_xsk_params_t params1 = params0;
1336 0 : params1.if_idx = lo_idx; /* probably always 1 */
1337 0 : params1.if_queue_id = 0;
1338 0 : params1.bind_flags = 0;
1339 0 : if( FD_UNLIKELY( !fd_xsk_init( &ctx->xsk[ 1 ], ¶ms1 ) ) ) FD_LOG_ERR(( "failed to bind lo_xsk" ));
1340 0 : if( FD_UNLIKELY( !fd_xsk_activate( &ctx->xsk[ 1 ], lo_fds.xsk_map_fd ) ) ) FD_LOG_ERR(( "failed to activate lo_xsk" ));
1341 0 : if( FD_UNLIKELY( -1==close( lo_fds.xsk_map_fd ) ) ) FD_LOG_ERR(( "close(%d) failed (%d-%s)", xsk_map_fd, errno, fd_io_strerror( errno ) ));
1342 0 : }
1343 :
1344 0 : double tick_per_ns = fd_tempo_tick_per_ns( NULL );
1345 0 : ctx->xdp_stats_interval_ticks = (long)( FD_XDP_STATS_INTERVAL_NS * tick_per_ns );
1346 :
1347 0 : ulong scratch_top = FD_SCRATCH_ALLOC_FINI( l, 1UL );
1348 0 : if( FD_UNLIKELY( scratch_top > (ulong)scratch + scratch_footprint( tile ) ) )
1349 0 : FD_LOG_ERR(( "scratch overflow %lu %lu %lu", scratch_top - (ulong)scratch - scratch_footprint( tile ), scratch_top, (ulong)scratch + scratch_footprint( tile ) ));
1350 0 : }
1351 :
1352 : /* init_device_table joins the net tile to the netlink tile's device
1353 : table. The device table is very frequently read, and rarely updated.
1354 : Therefore, the net tile keeps a local copy of the device table in
1355 : scratch memory. This table is periodically copied over from the
1356 : netlink tile via a double buffer (netdev_dbl_buf).
1357 :
1358 : On startup, the netlink tile might not have produced its initial
1359 : device table. Therefore, initialize the local copy to an empty
1360 : table. */
1361 :
1362 : static void
1363 : init_device_table( fd_net_ctx_t * ctx,
1364 3 : void * netdev_dbl_buf ) {
1365 :
1366 : /* Join remote double buffer containing device table updates */
1367 3 : ctx->netdev_dbl_buf = fd_dbl_buf_join( netdev_dbl_buf );
1368 3 : if( FD_UNLIKELY( !ctx->netdev_dbl_buf ) ) FD_LOG_ERR(( "fd_dbl_buf_join failed" ));
1369 3 : ctx->netdev_buf_sz = fd_netdev_tbl_footprint( NETDEV_MAX, BOND_MASTER_MAX );
1370 :
1371 : /* Create temporary empty device table during startup */
1372 3 : FD_TEST( fd_netdev_tbl_join( &ctx->netdev_tbl, fd_netdev_tbl_new( ctx->netdev_buf, 1, 1 ) ) );
1373 :
1374 3 : }
1375 :
1376 : FD_FN_UNUSED static void
1377 : unprivileged_init( fd_topo_t * topo,
1378 0 : fd_topo_tile_t * tile ) {
1379 0 : void * scratch = fd_topo_obj_laddr( topo, tile->tile_obj_id );
1380 :
1381 0 : FD_SCRATCH_ALLOC_INIT( l, scratch );
1382 0 : fd_net_ctx_t * ctx = FD_SCRATCH_ALLOC_APPEND( l, alignof(fd_net_ctx_t), sizeof(fd_net_ctx_t) );
1383 0 : FD_TEST( ctx->xsk_cnt!=0 );
1384 0 : FD_TEST( ctx->free_tx.queue!=NULL );
1385 0 : (void)FD_SCRATCH_ALLOC_APPEND( l, alignof(ulong), tile->xdp.free_ring_depth * sizeof(ulong) );
1386 0 : ctx->netdev_buf = FD_SCRATCH_ALLOC_APPEND( l, fd_netdev_tbl_align(), ctx->netdev_buf_sz );
1387 :
1388 0 : ctx->net_tile_id = (uint)tile->kind_id;
1389 0 : ctx->net_tile_cnt = (uint)fd_topo_tile_name_cnt( topo, tile->name );
1390 :
1391 0 : ctx->bind_address = tile->net.bind_address;
1392 0 : ctx->shred_listen_port = tile->net.shred_listen_port;
1393 0 : ctx->quic_transaction_listen_port = tile->net.quic_transaction_listen_port;
1394 0 : ctx->legacy_transaction_listen_port = tile->net.legacy_transaction_listen_port;
1395 0 : ctx->gossip_listen_port = tile->net.gossip_listen_port;
1396 0 : ctx->repair_intake_listen_port = tile->net.repair_intake_listen_port;
1397 0 : ctx->repair_serve_listen_port = tile->net.repair_serve_listen_port;
1398 0 : ctx->send_src_port = tile->net.send_src_port;
1399 :
1400 : /* Put a bound on chunks we read from the input, to make sure they
1401 : are within in the data region of the workspace. */
1402 :
1403 0 : if( FD_UNLIKELY( !tile->in_cnt ) ) FD_LOG_ERR(( "net tile in link cnt is zero" ));
1404 0 : if( FD_UNLIKELY( tile->in_cnt>MAX_NET_INS ) ) FD_LOG_ERR(( "net tile in link cnt %lu exceeds MAX_NET_INS %lu", tile->in_cnt, MAX_NET_INS ));
1405 0 : FD_TEST( tile->in_cnt<=32 );
1406 0 : for( ulong i=0UL; i<tile->in_cnt; i++ ) {
1407 0 : fd_topo_link_t * link = &topo->links[ tile->in_link_id[ i ] ];
1408 0 : if( FD_UNLIKELY( link->mtu!=FD_NET_MTU ) ) FD_LOG_ERR(( "net tile in link %s does not have a normal MTU", link->name ));
1409 :
1410 0 : ctx->in[ i ].mem = topo->workspaces[ topo->objs[ link->dcache_obj_id ].wksp_id ].wksp;
1411 0 : ctx->in[ i ].chunk0 = fd_dcache_compact_chunk0( ctx->in[ i ].mem, link->dcache );
1412 0 : ctx->in[ i ].wmark = fd_dcache_compact_wmark( ctx->in[ i ].mem, link->dcache, link->mtu );
1413 0 : }
1414 :
1415 0 : for( ulong i = 0; i < tile->out_cnt; i++ ) {
1416 0 : fd_topo_link_t * out_link = &topo->links[ tile->out_link_id[ i ] ];
1417 0 : if( strcmp( out_link->name, "net_quic" ) == 0 ) {
1418 0 : fd_topo_link_t * quic_out = out_link;
1419 0 : ctx->quic_out->mcache = quic_out->mcache;
1420 0 : ctx->quic_out->sync = fd_mcache_seq_laddr( ctx->quic_out->mcache );
1421 0 : ctx->quic_out->depth = fd_mcache_depth( ctx->quic_out->mcache );
1422 0 : ctx->quic_out->seq = fd_mcache_seq_query( ctx->quic_out->sync );
1423 0 : } else if( strcmp( out_link->name, "net_shred" ) == 0 ) {
1424 0 : fd_topo_link_t * shred_out = out_link;
1425 0 : ctx->shred_out->mcache = shred_out->mcache;
1426 0 : ctx->shred_out->sync = fd_mcache_seq_laddr( ctx->shred_out->mcache );
1427 0 : ctx->shred_out->depth = fd_mcache_depth( ctx->shred_out->mcache );
1428 0 : ctx->shred_out->seq = fd_mcache_seq_query( ctx->shred_out->sync );
1429 0 : } else if( strcmp( out_link->name, "net_gossip" ) == 0 ) {
1430 0 : fd_topo_link_t * gossip_out = out_link;
1431 0 : ctx->gossip_out->mcache = gossip_out->mcache;
1432 0 : ctx->gossip_out->sync = fd_mcache_seq_laddr( ctx->gossip_out->mcache );
1433 0 : ctx->gossip_out->depth = fd_mcache_depth( ctx->gossip_out->mcache );
1434 0 : ctx->gossip_out->seq = fd_mcache_seq_query( ctx->gossip_out->sync );
1435 0 : } else if( strcmp( out_link->name, "net_repair" ) == 0 ) {
1436 0 : fd_topo_link_t * repair_out = out_link;
1437 0 : ctx->repair_out->mcache = repair_out->mcache;
1438 0 : ctx->repair_out->sync = fd_mcache_seq_laddr( ctx->repair_out->mcache );
1439 0 : ctx->repair_out->depth = fd_mcache_depth( ctx->repair_out->mcache );
1440 0 : ctx->repair_out->seq = fd_mcache_seq_query( ctx->repair_out->sync );
1441 0 : } else if( strcmp( out_link->name, "net_netlnk" ) == 0 ) {
1442 0 : fd_topo_link_t * netlink_out = out_link;
1443 0 : ctx->neigh4_solicit->mcache = netlink_out->mcache;
1444 0 : ctx->neigh4_solicit->depth = fd_mcache_depth( ctx->neigh4_solicit->mcache );
1445 0 : ctx->neigh4_solicit->seq = fd_mcache_seq_query( fd_mcache_seq_laddr( ctx->neigh4_solicit->mcache ) );
1446 0 : } else if( strcmp( out_link->name, "net_send" ) == 0 ) {
1447 0 : fd_topo_link_t * send_out = out_link;
1448 0 : ctx->send_out->mcache = send_out->mcache;
1449 0 : ctx->send_out->sync = fd_mcache_seq_laddr( ctx->send_out->mcache );
1450 0 : ctx->send_out->depth = fd_mcache_depth( ctx->send_out->mcache );
1451 0 : ctx->send_out->seq = fd_mcache_seq_query( ctx->send_out->sync );
1452 0 : } else {
1453 0 : FD_LOG_ERR(( "unrecognized out link `%s`", out_link->name ));
1454 0 : }
1455 0 : }
1456 :
1457 : /* Check if any of the tiles we set a listen port for do not have an outlink. */
1458 0 : if( FD_UNLIKELY( ctx->shred_listen_port!=0 && ctx->shred_out->mcache==NULL ) ) {
1459 0 : FD_LOG_ERR(( "shred listen port set but no out link was found" ));
1460 0 : } else if( FD_UNLIKELY( ctx->quic_transaction_listen_port!=0 && ctx->quic_out->mcache==NULL ) ) {
1461 0 : FD_LOG_ERR(( "quic transaction listen port set but no out link was found" ));
1462 0 : } else if( FD_UNLIKELY( ctx->legacy_transaction_listen_port!=0 && ctx->quic_out->mcache==NULL ) ) {
1463 0 : FD_LOG_ERR(( "legacy transaction listen port set but no out link was found" ));
1464 0 : } else if( FD_UNLIKELY( ctx->gossip_listen_port!=0 && ctx->gossip_out->mcache==NULL ) ) {
1465 0 : FD_LOG_ERR(( "gossip listen port set but no out link was found" ));
1466 0 : } else if( FD_UNLIKELY( ctx->repair_intake_listen_port!=0 && ctx->repair_out->mcache==NULL ) ) {
1467 0 : FD_LOG_ERR(( "repair intake port set but no out link was found" ));
1468 0 : } else if( FD_UNLIKELY( ctx->repair_serve_listen_port!=0 && ctx->repair_out->mcache==NULL ) ) {
1469 0 : FD_LOG_ERR(( "repair serve listen port set but no out link was found" ));
1470 0 : } else if( FD_UNLIKELY( ctx->neigh4_solicit->mcache==NULL ) ) {
1471 0 : FD_LOG_ERR(( "netlink request link not found" ));
1472 0 : } else if( FD_UNLIKELY( ctx->send_src_port!=0 && ctx->send_out->mcache==NULL ) ) {
1473 0 : FD_LOG_ERR(( "send listen port set but no out link was found" ));
1474 0 : }
1475 :
1476 0 : for( uint j=0U; j<2U; j++ ) {
1477 0 : ctx->tx_flusher[ j ].pending_wmark = (ulong)( (double)tile->xdp.xdp_tx_queue_size * 0.7 );
1478 0 : ctx->tx_flusher[ j ].tail_flush_backoff = (long)( (double)tile->xdp.tx_flush_timeout_ns * fd_tempo_tick_per_ns( NULL ) );
1479 0 : ctx->tx_flusher[ j ].next_tail_flush_ticks = LONG_MAX;
1480 0 : }
1481 :
1482 : /* Join netbase objects */
1483 0 : ctx->fib_local = fd_fib4_join( fd_topo_obj_laddr( topo, tile->xdp.fib4_local_obj_id ) );
1484 0 : ctx->fib_main = fd_fib4_join( fd_topo_obj_laddr( topo, tile->xdp.fib4_main_obj_id ) );
1485 0 : if( FD_UNLIKELY( !ctx->fib_local || !ctx->fib_main ) ) FD_LOG_ERR(( "fd_fib4_join failed" ));
1486 0 : if( FD_UNLIKELY( !fd_neigh4_hmap_join(
1487 0 : ctx->neigh4,
1488 0 : fd_topo_obj_laddr( topo, tile->xdp.neigh4_obj_id ),
1489 0 : fd_topo_obj_laddr( topo, tile->xdp.neigh4_ele_obj_id ) ) ) ) {
1490 0 : FD_LOG_ERR(( "fd_neigh4_hmap_join failed" ));
1491 0 : }
1492 :
1493 0 : init_device_table( ctx, fd_topo_obj_laddr( topo, tile->xdp.netdev_dbl_buf_obj_id ) );
1494 :
1495 : /* Initialize TX free ring */
1496 :
1497 0 : ulong const frame_sz = 2048UL;
1498 0 : ulong frame_off = 0UL;
1499 0 : ulong const tx_depth = ctx->free_tx.depth;
1500 0 : for( ulong j=0; j<tx_depth; j++ ) {
1501 0 : ctx->free_tx.queue[ j ] = (ulong)ctx->umem_frame0 + frame_off;
1502 0 : frame_off += frame_sz;
1503 0 : }
1504 0 : ctx->free_tx.prod = tx_depth;
1505 :
1506 : /* Initialize RX mcache chunks */
1507 :
1508 0 : for( ulong i=0UL; i<(tile->out_cnt); i++ ) {
1509 0 : fd_topo_link_t * out_link = &topo->links[ tile->out_link_id[ i ] ];
1510 0 : fd_frag_meta_t * mcache = out_link->mcache;
1511 0 : for( ulong j=0UL; j<fd_mcache_depth( mcache ); j++ ) {
1512 0 : mcache[ j ].chunk = (uint)( ctx->umem_chunk0 + (frame_off>>FD_CHUNK_LG_SZ) );
1513 0 : frame_off += frame_sz;
1514 0 : }
1515 0 : }
1516 :
1517 : /* Initialize FILL ring */
1518 :
1519 0 : int _charge_busy = 0;
1520 0 : for( uint j=0U; j<ctx->xsk_cnt; j++ ) {
1521 0 : frame_off = net_xsk_bootstrap( ctx, j, frame_off );
1522 0 : net_rx_wakeup( ctx, &ctx->xsk[ j ], &_charge_busy );
1523 0 : net_tx_wakeup( ctx, &ctx->xsk[ j ], &_charge_busy );
1524 0 : }
1525 :
1526 0 : if( FD_UNLIKELY( frame_off > ctx->umem_sz ) ) {
1527 0 : FD_LOG_ERR(( "UMEM is too small" ));
1528 0 : }
1529 0 : }
1530 :
1531 : FD_FN_UNUSED static ulong
1532 : populate_allowed_seccomp( fd_topo_t const * topo,
1533 : fd_topo_tile_t const * tile,
1534 : ulong out_cnt,
1535 0 : struct sock_filter * out ) {
1536 0 : void * scratch = fd_topo_obj_laddr( topo, tile->tile_obj_id );
1537 0 : FD_SCRATCH_ALLOC_INIT( l, scratch );
1538 0 : fd_net_ctx_t * ctx = FD_SCRATCH_ALLOC_APPEND( l, alignof( fd_net_ctx_t ), sizeof( fd_net_ctx_t ) );
1539 :
1540 : /* A bit of a hack, if there is no loopback XSK for this tile, we still need to pass
1541 : two "allow" FD arguments to the net policy, so we just make them both the same. */
1542 0 : int allow_fd2 = ctx->xsk_cnt>1UL ? ctx->xsk[ 1 ].xsk_fd : ctx->xsk[ 0 ].xsk_fd;
1543 0 : FD_TEST( ctx->xsk[ 0 ].xsk_fd >= 0 && allow_fd2 >= 0 );
1544 :
1545 0 : populate_sock_filter_policy_fd_xdp_tile( out_cnt, out, (uint)fd_log_private_logfile_fd(), (uint)ctx->xsk[ 0 ].xsk_fd, (uint)allow_fd2 );
1546 0 : return sock_filter_policy_fd_xdp_tile_instr_cnt;
1547 0 : }
1548 :
1549 : FD_FN_UNUSED static ulong
1550 : populate_allowed_fds( fd_topo_t const * topo,
1551 : fd_topo_tile_t const * tile,
1552 : ulong out_fds_cnt,
1553 0 : int * out_fds ) {
1554 0 : void * scratch = fd_topo_obj_laddr( topo, tile->tile_obj_id );
1555 0 : FD_SCRATCH_ALLOC_INIT( l, scratch );
1556 0 : fd_net_ctx_t * ctx = FD_SCRATCH_ALLOC_APPEND( l, alignof( fd_net_ctx_t ), sizeof( fd_net_ctx_t ) );
1557 :
1558 0 : if( FD_UNLIKELY( out_fds_cnt<6UL ) ) FD_LOG_ERR(( "out_fds_cnt %lu", out_fds_cnt ));
1559 :
1560 0 : ulong out_cnt = 0UL;
1561 :
1562 0 : out_fds[ out_cnt++ ] = 2; /* stderr */
1563 0 : if( FD_LIKELY( -1!=fd_log_private_logfile_fd() ) )
1564 0 : out_fds[ out_cnt++ ] = fd_log_private_logfile_fd(); /* logfile */
1565 :
1566 0 : out_fds[ out_cnt++ ] = ctx->xsk[ 0 ].xsk_fd;
1567 0 : out_fds[ out_cnt++ ] = ctx->prog_link_fds[ 0 ];
1568 0 : if( FD_LIKELY( ctx->xsk_cnt>1UL ) ) out_fds[ out_cnt++ ] = ctx->xsk[ 1 ].xsk_fd;
1569 0 : if( FD_LIKELY( ctx->xsk_cnt>1UL ) ) out_fds[ out_cnt++ ] = ctx->prog_link_fds[ 1 ];
1570 0 : return out_cnt;
1571 0 : }
1572 :
1573 0 : #define STEM_BURST (1UL)
1574 0 : #define STEM_LAZY ((ulong)30e3) /* 30 us */
1575 :
1576 0 : #define STEM_CALLBACK_CONTEXT_TYPE fd_net_ctx_t
1577 0 : #define STEM_CALLBACK_CONTEXT_ALIGN alignof(fd_net_ctx_t)
1578 :
1579 0 : #define STEM_CALLBACK_METRICS_WRITE metrics_write
1580 0 : #define STEM_CALLBACK_DURING_HOUSEKEEPING during_housekeeping
1581 0 : #define STEM_CALLBACK_BEFORE_CREDIT before_credit
1582 0 : #define STEM_CALLBACK_BEFORE_FRAG before_frag
1583 0 : #define STEM_CALLBACK_DURING_FRAG during_frag
1584 0 : #define STEM_CALLBACK_AFTER_FRAG after_frag
1585 :
1586 : #include "../../stem/fd_stem.c"
1587 :
1588 : #ifndef FD_TILE_TEST
1589 : fd_topo_run_tile_t fd_tile_net = {
1590 : .name = "net",
1591 : .populate_allowed_seccomp = populate_allowed_seccomp,
1592 : .populate_allowed_fds = populate_allowed_fds,
1593 : .scratch_align = scratch_align,
1594 : .scratch_footprint = scratch_footprint,
1595 : .privileged_init = privileged_init,
1596 : .unprivileged_init = unprivileged_init,
1597 : .run = stem_run,
1598 : };
1599 : #endif
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