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c803536e | 1 | /* |
7b383a56 | 2 | * Copyright (c) 2014, 2016 VMware, Inc. |
c803536e SS |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | #include "precomp.h" | |
18 | ||
ee25964a | 19 | #include "Actions.h" |
792d377d | 20 | #include "Conntrack.h" |
7b383a56 | 21 | #include "Debug.h" |
fa1324c9 | 22 | #include "Event.h" |
fa1324c9 | 23 | #include "Flow.h" |
85571a3d | 24 | #include "Gre.h" |
245eedef | 25 | #include "Jhash.h" |
5874d571 | 26 | #include "Mpls.h" |
85571a3d | 27 | #include "NetProto.h" |
7b383a56 | 28 | #include "Offload.h" |
fa1324c9 | 29 | #include "PacketIO.h" |
ee25964a | 30 | #include "Recirc.h" |
85571a3d AS |
31 | #include "Stt.h" |
32 | #include "Switch.h" | |
33 | #include "User.h" | |
34 | #include "Vport.h" | |
35 | #include "Vxlan.h" | |
47c3123d | 36 | #include "Geneve.h" |
c803536e | 37 | |
c803536e SS |
38 | #ifdef OVS_DBG_MOD |
39 | #undef OVS_DBG_MOD | |
40 | #endif | |
41 | #define OVS_DBG_MOD OVS_DBG_ACTION | |
c803536e | 42 | |
ee25964a SV |
43 | #define OVS_DEST_PORTS_ARRAY_MIN_SIZE 2 |
44 | ||
c803536e | 45 | typedef struct _OVS_ACTION_STATS { |
85571a3d AS |
46 | UINT64 rxGre; |
47 | UINT64 txGre; | |
c803536e SS |
48 | UINT64 rxVxlan; |
49 | UINT64 txVxlan; | |
022c2040 EE |
50 | UINT64 rxStt; |
51 | UINT64 txStt; | |
47c3123d YL |
52 | UINT64 rxGeneve; |
53 | UINT64 txGeneve; | |
c803536e SS |
54 | UINT64 flowMiss; |
55 | UINT64 flowUserspace; | |
56 | UINT64 txTcp; | |
57 | UINT32 failedFlowMiss; | |
58 | UINT32 noVport; | |
59 | UINT32 failedFlowExtract; | |
60 | UINT32 noResource; | |
61 | UINT32 noCopiedNbl; | |
62 | UINT32 failedEncap; | |
63 | UINT32 failedDecap; | |
64 | UINT32 cannotGrowDest; | |
65 | UINT32 zeroActionLen; | |
66 | UINT32 failedChecksum; | |
ee25964a SV |
67 | UINT32 deferredActionsQueueFull; |
68 | UINT32 deferredActionsExecLimit; | |
c803536e SS |
69 | } OVS_ACTION_STATS, *POVS_ACTION_STATS; |
70 | ||
71 | OVS_ACTION_STATS ovsActionStats; | |
72 | ||
73 | /* | |
74 | * There a lot of data that needs to be maintained while executing the pipeline | |
75 | * as dictated by the actions of a flow, across different functions at different | |
76 | * levels. Such data is put together in a 'context' structure. Care should be | |
77 | * exercised while adding new members to the structure - only add ones that get | |
78 | * used across multiple stages in the pipeline/get used in multiple functions. | |
79 | */ | |
c803536e SS |
80 | typedef struct OvsForwardingContext { |
81 | POVS_SWITCH_CONTEXT switchContext; | |
82 | /* The NBL currently used in the pipeline. */ | |
83 | PNET_BUFFER_LIST curNbl; | |
84 | /* NDIS forwarding detail for 'curNbl'. */ | |
85 | PNDIS_SWITCH_FORWARDING_DETAIL_NET_BUFFER_LIST_INFO fwdDetail; | |
86 | /* Array of destination ports for 'curNbl'. */ | |
87 | PNDIS_SWITCH_FORWARDING_DESTINATION_ARRAY destinationPorts; | |
88 | /* send flags while sending 'curNbl' into NDIS. */ | |
89 | ULONG sendFlags; | |
90 | /* Total number of output ports, used + unused, in 'curNbl'. */ | |
91 | UINT32 destPortsSizeIn; | |
92 | /* Total number of used output ports in 'curNbl'. */ | |
93 | UINT32 destPortsSizeOut; | |
94 | /* | |
95 | * If 'curNbl' is not owned by OVS, they need to be tracked, if they need to | |
96 | * be freed/completed. | |
97 | */ | |
98 | OvsCompletionList *completionList; | |
99 | /* | |
100 | * vport number of 'curNbl' when it is passed from the PIF bridge to the INT | |
101 | * bridge. ie. during tunneling on the Rx side. | |
102 | */ | |
103 | UINT32 srcVportNo; | |
104 | ||
105 | /* | |
106 | * Tunnel key: | |
107 | * - specified in actions during tunneling Tx | |
108 | * - extracted from an NBL during tunneling Rx | |
109 | */ | |
110 | OvsIPv4TunnelKey tunKey; | |
111 | ||
ee25964a | 112 | /* |
c803536e SS |
113 | * Tunneling - Tx: |
114 | * To store the output port, when it is a tunneled port. We don't foresee | |
115 | * multiple tunneled ports as outport for any given NBL. | |
116 | */ | |
117 | POVS_VPORT_ENTRY tunnelTxNic; | |
118 | ||
119 | /* | |
120 | * Tunneling - Rx: | |
121 | * Points to the Internal port on the PIF Bridge, if the packet needs to be | |
122 | * de-tunneled. | |
123 | */ | |
124 | POVS_VPORT_ENTRY tunnelRxNic; | |
125 | ||
126 | /* header information */ | |
127 | OVS_PACKET_HDR_INFO layers; | |
128 | } OvsForwardingContext; | |
129 | ||
c803536e SS |
130 | /* |
131 | * -------------------------------------------------------------------------- | |
132 | * OvsInitForwardingCtx -- | |
133 | * Function to init/re-init the 'ovsFwdCtx' context as the actions pipeline | |
134 | * is being executed. | |
135 | * | |
136 | * Result: | |
137 | * NDIS_STATUS_SUCCESS on success | |
138 | * Other NDIS_STATUS upon failure. Upon failure, it is safe to call | |
139 | * OvsCompleteNBLForwardingCtx(), since 'ovsFwdCtx' has been initialized | |
140 | * enough for OvsCompleteNBLForwardingCtx() to do its work. | |
141 | * -------------------------------------------------------------------------- | |
142 | */ | |
143 | static __inline NDIS_STATUS | |
144 | OvsInitForwardingCtx(OvsForwardingContext *ovsFwdCtx, | |
145 | POVS_SWITCH_CONTEXT switchContext, | |
146 | PNET_BUFFER_LIST curNbl, | |
147 | UINT32 srcVportNo, | |
148 | ULONG sendFlags, | |
149 | PNDIS_SWITCH_FORWARDING_DETAIL_NET_BUFFER_LIST_INFO fwdDetail, | |
150 | OvsCompletionList *completionList, | |
151 | OVS_PACKET_HDR_INFO *layers, | |
152 | BOOLEAN resetTunnelInfo) | |
153 | { | |
154 | ASSERT(ovsFwdCtx); | |
155 | ASSERT(switchContext); | |
156 | ASSERT(curNbl); | |
157 | ASSERT(fwdDetail); | |
158 | ||
159 | /* | |
160 | * Set values for curNbl and switchContext so upon failures, we have enough | |
161 | * information to do cleanup. | |
162 | */ | |
163 | ovsFwdCtx->curNbl = curNbl; | |
164 | ovsFwdCtx->switchContext = switchContext; | |
165 | ovsFwdCtx->completionList = completionList; | |
166 | ovsFwdCtx->fwdDetail = fwdDetail; | |
167 | ||
168 | if (fwdDetail->NumAvailableDestinations > 0) { | |
169 | /* | |
170 | * XXX: even though MSDN says GetNetBufferListDestinations() returns | |
171 | * NDIS_STATUS, the header files say otherwise. | |
172 | */ | |
173 | switchContext->NdisSwitchHandlers.GetNetBufferListDestinations( | |
174 | switchContext->NdisSwitchContext, curNbl, | |
175 | &ovsFwdCtx->destinationPorts); | |
176 | ||
177 | ASSERT(ovsFwdCtx->destinationPorts); | |
178 | /* Ensure that none of the elements are consumed yet. */ | |
179 | ASSERT(ovsFwdCtx->destinationPorts->NumElements == | |
180 | fwdDetail->NumAvailableDestinations); | |
181 | } else { | |
182 | ovsFwdCtx->destinationPorts = NULL; | |
183 | } | |
184 | ovsFwdCtx->destPortsSizeIn = fwdDetail->NumAvailableDestinations; | |
185 | ovsFwdCtx->destPortsSizeOut = 0; | |
186 | ovsFwdCtx->srcVportNo = srcVportNo; | |
187 | ovsFwdCtx->sendFlags = sendFlags; | |
188 | if (layers) { | |
189 | ovsFwdCtx->layers = *layers; | |
190 | } else { | |
191 | RtlZeroMemory(&ovsFwdCtx->layers, sizeof ovsFwdCtx->layers); | |
192 | } | |
193 | if (resetTunnelInfo) { | |
194 | ovsFwdCtx->tunnelTxNic = NULL; | |
195 | ovsFwdCtx->tunnelRxNic = NULL; | |
196 | RtlZeroMemory(&ovsFwdCtx->tunKey, sizeof ovsFwdCtx->tunKey); | |
197 | } | |
198 | ||
199 | return NDIS_STATUS_SUCCESS; | |
200 | } | |
201 | ||
202 | /* | |
203 | * -------------------------------------------------------------------------- | |
204 | * OvsDetectTunnelRxPkt -- | |
205 | * Utility function for an RX packet to detect its tunnel type. | |
206 | * | |
207 | * Result: | |
208 | * True - if the tunnel type was detected. | |
209 | * False - if not a tunnel packet or tunnel type not supported. | |
210 | * -------------------------------------------------------------------------- | |
211 | */ | |
212 | static __inline BOOLEAN | |
213 | OvsDetectTunnelRxPkt(OvsForwardingContext *ovsFwdCtx, | |
214 | const OvsFlowKey *flowKey) | |
215 | { | |
216 | POVS_VPORT_ENTRY tunnelVport = NULL; | |
217 | ||
218 | /* XXX: we should also check for the length of the UDP payload to pick | |
219 | * packets only if they are at least VXLAN header size. | |
220 | */ | |
885b8265 NR |
221 | |
222 | /* | |
223 | * For some of the tunnel types such as GRE, the dstPort is not applicable | |
224 | * since GRE does not have a L4 port. We use '0' for convenience. | |
225 | */ | |
85571a3d | 226 | if (!flowKey->ipKey.nwFrag) { |
022c2040 | 227 | UINT16 dstPort = htons(flowKey->ipKey.l4.tpDst); |
885b8265 NR |
228 | |
229 | ASSERT(flowKey->ipKey.nwProto != IPPROTO_GRE || dstPort == 0); | |
230 | ||
231 | tunnelVport = | |
232 | OvsFindTunnelVportByDstPortAndNWProto(ovsFwdCtx->switchContext, | |
233 | dstPort, | |
234 | flowKey->ipKey.nwProto); | |
235 | if (tunnelVport) { | |
236 | switch(tunnelVport->ovsType) { | |
237 | case OVS_VPORT_TYPE_STT: | |
85571a3d | 238 | ovsActionStats.rxStt++; |
885b8265 NR |
239 | break; |
240 | case OVS_VPORT_TYPE_VXLAN: | |
85571a3d | 241 | ovsActionStats.rxVxlan++; |
885b8265 | 242 | break; |
47c3123d YL |
243 | case OVS_VPORT_TYPE_GENEVE: |
244 | ovsActionStats.rxGeneve++; | |
245 | break; | |
885b8265 NR |
246 | case OVS_VPORT_TYPE_GRE: |
247 | ovsActionStats.rxGre++; | |
248 | break; | |
85571a3d | 249 | } |
022c2040 | 250 | } |
c803536e SS |
251 | } |
252 | ||
253 | // We might get tunnel packets even before the tunnel gets initialized. | |
254 | if (tunnelVport) { | |
255 | ASSERT(ovsFwdCtx->tunnelRxNic == NULL); | |
256 | ovsFwdCtx->tunnelRxNic = tunnelVport; | |
257 | return TRUE; | |
258 | } | |
259 | ||
260 | return FALSE; | |
261 | } | |
262 | ||
263 | /* | |
264 | * -------------------------------------------------------------------------- | |
265 | * OvsDetectTunnelPkt -- | |
b2d9d3e8 NR |
266 | * Utility function to detect if a packet is to be subjected to |
267 | * tunneling (Tx) or de-tunneling (Rx). Various factors such as source | |
268 | * port, destination port, packet contents, and previously setup tunnel | |
269 | * context are used. | |
c803536e SS |
270 | * |
271 | * Result: | |
b2d9d3e8 NR |
272 | * True - If the packet is to be subjected to tunneling. |
273 | * In case of invalid tunnel context, the tunneling functionality is | |
274 | * a no-op and is completed within this function itself by consuming | |
275 | * all of the tunneling context. | |
276 | * False - If not a tunnel packet or tunnel type not supported. Caller should | |
277 | * process the packet as a non-tunnel packet. | |
c803536e SS |
278 | * -------------------------------------------------------------------------- |
279 | */ | |
280 | static __inline BOOLEAN | |
281 | OvsDetectTunnelPkt(OvsForwardingContext *ovsFwdCtx, | |
282 | const POVS_VPORT_ENTRY dstVport, | |
283 | const OvsFlowKey *flowKey) | |
284 | { | |
c803536e | 285 | if (OvsIsInternalVportType(dstVport->ovsType)) { |
b2d9d3e8 NR |
286 | /* |
287 | * Rx: | |
288 | * The source of NBL during tunneling Rx could be the external | |
289 | * port or if it is being executed from userspace, the source port is | |
290 | * default port. | |
291 | */ | |
7434992b NR |
292 | BOOLEAN validSrcPort = |
293 | (ovsFwdCtx->fwdDetail->SourcePortId == | |
294 | ovsFwdCtx->switchContext->virtualExternalPortId) || | |
295 | (ovsFwdCtx->fwdDetail->SourcePortId == | |
296 | NDIS_SWITCH_DEFAULT_PORT_ID); | |
c803536e SS |
297 | |
298 | if (validSrcPort && OvsDetectTunnelRxPkt(ovsFwdCtx, flowKey)) { | |
299 | ASSERT(ovsFwdCtx->tunnelTxNic == NULL); | |
300 | ASSERT(ovsFwdCtx->tunnelRxNic != NULL); | |
301 | return TRUE; | |
302 | } | |
303 | } else if (OvsIsTunnelVportType(dstVport->ovsType)) { | |
c803536e | 304 | ASSERT(ovsFwdCtx->tunnelRxNic == NULL); |
b2d9d3e8 NR |
305 | |
306 | /* | |
307 | * Tx: | |
308 | * The destination port is a tunnel port. Encapsulation must be | |
30bc8153 NR |
309 | * performed only on packets that originate from: |
310 | * - a VIF port | |
311 | * - a bridge-internal port (packets generated from userspace) | |
312 | * - no port. | |
4ed803da | 313 | * - tunnel port |
b2d9d3e8 NR |
314 | * If the packet will not be encapsulated, consume the tunnel context |
315 | * by clearing it. | |
316 | */ | |
12e888ba | 317 | if (ovsFwdCtx->srcVportNo != OVS_DPPORT_NUMBER_INVALID) { |
429d4556 AS |
318 | |
319 | POVS_VPORT_ENTRY vport = OvsFindVportByPortNo( | |
320 | ovsFwdCtx->switchContext, ovsFwdCtx->srcVportNo); | |
321 | ||
30bc8153 NR |
322 | if (!vport || |
323 | (vport->ovsType != OVS_VPORT_TYPE_NETDEV && | |
cd30b346 | 324 | vport->ovsType != OVS_VPORT_TYPE_INTERNAL && |
4ed803da | 325 | !OvsIsTunnelVportType(vport->ovsType))) { |
429d4556 AS |
326 | ovsFwdCtx->tunKey.dst = 0; |
327 | } | |
b2d9d3e8 NR |
328 | } |
329 | ||
330 | /* Tunnel the packet only if tunnel context is set. */ | |
331 | if (ovsFwdCtx->tunKey.dst != 0) { | |
022c2040 | 332 | switch(dstVport->ovsType) { |
85571a3d AS |
333 | case OVS_VPORT_TYPE_GRE: |
334 | ovsActionStats.txGre++; | |
335 | break; | |
022c2040 EE |
336 | case OVS_VPORT_TYPE_VXLAN: |
337 | ovsActionStats.txVxlan++; | |
338 | break; | |
339 | case OVS_VPORT_TYPE_STT: | |
340 | ovsActionStats.txStt++; | |
341 | break; | |
47c3123d YL |
342 | case OVS_VPORT_TYPE_GENEVE: |
343 | ovsActionStats.txGeneve++; | |
344 | break; | |
022c2040 | 345 | } |
b2d9d3e8 NR |
346 | ovsFwdCtx->tunnelTxNic = dstVport; |
347 | } | |
348 | ||
c803536e SS |
349 | return TRUE; |
350 | } | |
351 | ||
352 | return FALSE; | |
353 | } | |
354 | ||
355 | ||
356 | /* | |
357 | * -------------------------------------------------------------------------- | |
358 | * OvsAddPorts -- | |
359 | * Add the specified destination vport into the forwarding context. If the | |
360 | * vport is a VIF/external port, it is added directly to the NBL. If it is | |
361 | * a tunneling port, it is NOT added to the NBL. | |
362 | * | |
363 | * Result: | |
364 | * NDIS_STATUS_SUCCESS on success | |
365 | * Other NDIS_STATUS upon failure. | |
366 | * -------------------------------------------------------------------------- | |
367 | */ | |
368 | static __inline NDIS_STATUS | |
369 | OvsAddPorts(OvsForwardingContext *ovsFwdCtx, | |
370 | OvsFlowKey *flowKey, | |
371 | NDIS_SWITCH_PORT_ID dstPortId, | |
372 | BOOLEAN preserveVLAN, | |
373 | BOOLEAN preservePriority) | |
374 | { | |
375 | POVS_VPORT_ENTRY vport; | |
376 | PNDIS_SWITCH_PORT_DESTINATION fwdPort; | |
377 | NDIS_STATUS status; | |
378 | POVS_SWITCH_CONTEXT switchContext = ovsFwdCtx->switchContext; | |
379 | ||
380 | /* | |
381 | * We hold the dispatch lock that protects the list of vports, so vports | |
382 | * validated here can be added as destinations safely before we call into | |
383 | * NDIS. | |
384 | * | |
385 | * Some of the vports can be tunnelled ports as well in which case | |
386 | * they should be added to a separate list of tunnelled destination ports | |
387 | * instead of the VIF ports. The context for the tunnel is settable | |
388 | * in OvsForwardingContext. | |
389 | */ | |
390 | vport = OvsFindVportByPortNo(ovsFwdCtx->switchContext, dstPortId); | |
391 | if (vport == NULL || vport->ovsState != OVS_STATE_CONNECTED) { | |
392 | /* | |
393 | * There may be some latency between a port disappearing, and userspace | |
394 | * updating the recalculated flows. In the meantime, handle invalid | |
395 | * ports gracefully. | |
396 | */ | |
397 | ovsActionStats.noVport++; | |
398 | return NDIS_STATUS_SUCCESS; | |
399 | } | |
400 | ASSERT(vport->nicState == NdisSwitchNicStateConnected); | |
401 | vport->stats.txPackets++; | |
402 | vport->stats.txBytes += | |
403 | NET_BUFFER_DATA_LENGTH(NET_BUFFER_LIST_FIRST_NB(ovsFwdCtx->curNbl)); | |
404 | ||
405 | if (OvsDetectTunnelPkt(ovsFwdCtx, vport, flowKey)) { | |
c803536e SS |
406 | return NDIS_STATUS_SUCCESS; |
407 | } | |
408 | ||
409 | if (ovsFwdCtx->destPortsSizeOut == ovsFwdCtx->destPortsSizeIn) { | |
410 | if (ovsFwdCtx->destPortsSizeIn == 0) { | |
411 | ASSERT(ovsFwdCtx->destinationPorts == NULL); | |
412 | ASSERT(ovsFwdCtx->fwdDetail->NumAvailableDestinations == 0); | |
413 | status = | |
414 | switchContext->NdisSwitchHandlers.GrowNetBufferListDestinations( | |
415 | switchContext->NdisSwitchContext, ovsFwdCtx->curNbl, | |
416 | OVS_DEST_PORTS_ARRAY_MIN_SIZE, | |
417 | &ovsFwdCtx->destinationPorts); | |
418 | if (status != NDIS_STATUS_SUCCESS) { | |
419 | ovsActionStats.cannotGrowDest++; | |
420 | return status; | |
421 | } | |
422 | ovsFwdCtx->destPortsSizeIn = | |
423 | ovsFwdCtx->fwdDetail->NumAvailableDestinations; | |
424 | ASSERT(ovsFwdCtx->destinationPorts); | |
425 | } else { | |
426 | ASSERT(ovsFwdCtx->destinationPorts != NULL); | |
427 | /* | |
428 | * NumElements: | |
429 | * A ULONG value that specifies the total number of | |
430 | * NDIS_SWITCH_PORT_DESTINATION elements in the | |
431 | * NDIS_SWITCH_FORWARDING_DESTINATION_ARRAY structure. | |
432 | * | |
433 | * NumDestinations: | |
434 | * A ULONG value that specifies the number of | |
435 | * NDIS_SWITCH_PORT_DESTINATION elements in the | |
436 | * NDIS_SWITCH_FORWARDING_DESTINATION_ARRAY structure that | |
437 | * specify port destinations. | |
438 | * | |
439 | * NumAvailableDestinations: | |
440 | * A value that specifies the number of unused extensible switch | |
441 | * destination ports elements within an NET_BUFFER_LIST structure. | |
442 | */ | |
443 | ASSERT(ovsFwdCtx->destinationPorts->NumElements == | |
444 | ovsFwdCtx->destPortsSizeIn); | |
445 | ASSERT(ovsFwdCtx->destinationPorts->NumDestinations == | |
446 | ovsFwdCtx->destPortsSizeOut - | |
447 | ovsFwdCtx->fwdDetail->NumAvailableDestinations); | |
448 | ASSERT(ovsFwdCtx->fwdDetail->NumAvailableDestinations > 0); | |
449 | /* | |
450 | * Before we grow the array of destination ports, the current set | |
451 | * of ports needs to be committed. Only the ports added since the | |
452 | * last commit need to be part of the new update. | |
453 | */ | |
454 | status = switchContext->NdisSwitchHandlers.UpdateNetBufferListDestinations( | |
455 | switchContext->NdisSwitchContext, ovsFwdCtx->curNbl, | |
456 | ovsFwdCtx->fwdDetail->NumAvailableDestinations, | |
457 | ovsFwdCtx->destinationPorts); | |
458 | if (status != NDIS_STATUS_SUCCESS) { | |
459 | ovsActionStats.cannotGrowDest++; | |
460 | return status; | |
461 | } | |
462 | ASSERT(ovsFwdCtx->destinationPorts->NumElements == | |
463 | ovsFwdCtx->destPortsSizeIn); | |
464 | ASSERT(ovsFwdCtx->destinationPorts->NumDestinations == | |
465 | ovsFwdCtx->destPortsSizeOut); | |
466 | ASSERT(ovsFwdCtx->fwdDetail->NumAvailableDestinations == 0); | |
467 | ||
468 | status = switchContext->NdisSwitchHandlers.GrowNetBufferListDestinations( | |
469 | switchContext->NdisSwitchContext, ovsFwdCtx->curNbl, | |
470 | ovsFwdCtx->destPortsSizeIn, &ovsFwdCtx->destinationPorts); | |
471 | if (status != NDIS_STATUS_SUCCESS) { | |
472 | ovsActionStats.cannotGrowDest++; | |
473 | return status; | |
474 | } | |
475 | ASSERT(ovsFwdCtx->destinationPorts != NULL); | |
476 | ovsFwdCtx->destPortsSizeIn <<= 1; | |
477 | } | |
478 | } | |
479 | ||
480 | ASSERT(ovsFwdCtx->destPortsSizeOut < ovsFwdCtx->destPortsSizeIn); | |
481 | fwdPort = | |
482 | NDIS_SWITCH_PORT_DESTINATION_AT_ARRAY_INDEX(ovsFwdCtx->destinationPorts, | |
483 | ovsFwdCtx->destPortsSizeOut); | |
484 | ||
485 | fwdPort->PortId = vport->portId; | |
486 | fwdPort->NicIndex = vport->nicIndex; | |
487 | fwdPort->IsExcluded = 0; | |
488 | fwdPort->PreserveVLAN = preserveVLAN; | |
489 | fwdPort->PreservePriority = preservePriority; | |
490 | ovsFwdCtx->destPortsSizeOut += 1; | |
491 | ||
492 | return NDIS_STATUS_SUCCESS; | |
493 | } | |
494 | ||
495 | ||
496 | /* | |
497 | * -------------------------------------------------------------------------- | |
498 | * OvsClearTunTxCtx -- | |
499 | * Utility function to clear tx tunneling context. | |
500 | * -------------------------------------------------------------------------- | |
501 | */ | |
502 | static __inline VOID | |
503 | OvsClearTunTxCtx(OvsForwardingContext *ovsFwdCtx) | |
504 | { | |
505 | ovsFwdCtx->tunnelTxNic = NULL; | |
506 | ovsFwdCtx->tunKey.dst = 0; | |
507 | } | |
508 | ||
509 | ||
510 | /* | |
511 | * -------------------------------------------------------------------------- | |
512 | * OvsClearTunRxCtx -- | |
513 | * Utility function to clear rx tunneling context. | |
514 | * -------------------------------------------------------------------------- | |
515 | */ | |
516 | static __inline VOID | |
517 | OvsClearTunRxCtx(OvsForwardingContext *ovsFwdCtx) | |
518 | { | |
519 | ovsFwdCtx->tunnelRxNic = NULL; | |
520 | ovsFwdCtx->tunKey.dst = 0; | |
521 | } | |
522 | ||
523 | ||
524 | /* | |
525 | * -------------------------------------------------------------------------- | |
526 | * OvsCompleteNBLForwardingCtx -- | |
527 | * This utility function is responsible for freeing/completing an NBL - either | |
528 | * by adding it to a completion list or by freeing it. | |
529 | * | |
530 | * Side effects: | |
531 | * It also resets the necessary fields in 'ovsFwdCtx'. | |
532 | * -------------------------------------------------------------------------- | |
533 | */ | |
534 | static __inline VOID | |
535 | OvsCompleteNBLForwardingCtx(OvsForwardingContext *ovsFwdCtx, | |
536 | PCWSTR dropReason) | |
537 | { | |
538 | NDIS_STRING filterReason; | |
539 | ||
540 | RtlInitUnicodeString(&filterReason, dropReason); | |
541 | if (ovsFwdCtx->completionList) { | |
542 | OvsAddPktCompletionList(ovsFwdCtx->completionList, TRUE, | |
543 | ovsFwdCtx->fwdDetail->SourcePortId, ovsFwdCtx->curNbl, 1, | |
544 | &filterReason); | |
545 | ovsFwdCtx->curNbl = NULL; | |
546 | } else { | |
547 | /* If there is no completionList, we assume this is ovs created NBL */ | |
548 | ovsFwdCtx->curNbl = OvsCompleteNBL(ovsFwdCtx->switchContext, | |
549 | ovsFwdCtx->curNbl, TRUE); | |
550 | ASSERT(ovsFwdCtx->curNbl == NULL); | |
551 | } | |
552 | /* XXX: these can be made debug only to save cycles. Ideally the pipeline | |
553 | * using these fields should reset the values at the end of the pipeline. */ | |
554 | ovsFwdCtx->destPortsSizeOut = 0; | |
555 | ovsFwdCtx->tunnelTxNic = NULL; | |
556 | ovsFwdCtx->tunnelRxNic = NULL; | |
557 | } | |
558 | ||
559 | /* | |
560 | * -------------------------------------------------------------------------- | |
561 | * OvsDoFlowLookupOutput -- | |
562 | * Function to be used for the second stage of a tunneling workflow, ie.: | |
563 | * - On the encapsulated packet on Tx path, to do a flow extract, flow | |
564 | * lookup and excuting the actions. | |
565 | * - On the decapsulated packet on Rx path, to do a flow extract, flow | |
566 | * lookup and excuting the actions. | |
567 | * | |
568 | * XXX: It is assumed that the NBL in 'ovsFwdCtx' is owned by OVS. This is | |
569 | * until the new buffer management framework is adopted. | |
570 | * | |
571 | * Side effects: | |
572 | * The NBL in 'ovsFwdCtx' is consumed. | |
573 | * -------------------------------------------------------------------------- | |
574 | */ | |
575 | static __inline NDIS_STATUS | |
576 | OvsDoFlowLookupOutput(OvsForwardingContext *ovsFwdCtx) | |
577 | { | |
ee25964a SV |
578 | OvsFlowKey key = { 0 }; |
579 | OvsFlow *flow = NULL; | |
580 | UINT64 hash = 0; | |
581 | NDIS_STATUS status = NDIS_STATUS_SUCCESS; | |
c803536e SS |
582 | POVS_VPORT_ENTRY vport = |
583 | OvsFindVportByPortNo(ovsFwdCtx->switchContext, ovsFwdCtx->srcVportNo); | |
584 | if (vport == NULL || vport->ovsState != OVS_STATE_CONNECTED) { | |
c803536e SS |
585 | OvsCompleteNBLForwardingCtx(ovsFwdCtx, |
586 | L"OVS-Dropped due to internal/tunnel port removal"); | |
587 | ovsActionStats.noVport++; | |
588 | return NDIS_STATUS_SUCCESS; | |
589 | } | |
590 | ASSERT(vport->nicState == NdisSwitchNicStateConnected); | |
591 | ||
592 | /* Assert that in the Rx direction, key is always setup. */ | |
593 | ASSERT(ovsFwdCtx->tunnelRxNic == NULL || ovsFwdCtx->tunKey.dst != 0); | |
4c470e88 SV |
594 | status = |
595 | OvsExtractFlow(ovsFwdCtx->curNbl, ovsFwdCtx->srcVportNo, | |
596 | &key, &ovsFwdCtx->layers, | |
597 | ovsFwdCtx->tunKey.dst != 0 ? &ovsFwdCtx->tunKey : NULL); | |
c803536e SS |
598 | if (status != NDIS_STATUS_SUCCESS) { |
599 | OvsCompleteNBLForwardingCtx(ovsFwdCtx, | |
600 | L"OVS-Flow extract failed"); | |
601 | ovsActionStats.failedFlowExtract++; | |
602 | return status; | |
603 | } | |
604 | ||
605 | flow = OvsLookupFlow(&ovsFwdCtx->switchContext->datapath, &key, &hash, FALSE); | |
606 | if (flow) { | |
607 | OvsFlowUsed(flow, ovsFwdCtx->curNbl, &ovsFwdCtx->layers); | |
608 | ovsFwdCtx->switchContext->datapath.hits++; | |
ee25964a SV |
609 | status = OvsDoExecuteActions(ovsFwdCtx->switchContext, |
610 | ovsFwdCtx->completionList, | |
611 | ovsFwdCtx->curNbl, | |
612 | ovsFwdCtx->srcVportNo, | |
613 | ovsFwdCtx->sendFlags, | |
614 | &key, &hash, &ovsFwdCtx->layers, | |
615 | flow->actions, flow->actionsLen); | |
c803536e SS |
616 | ovsFwdCtx->curNbl = NULL; |
617 | } else { | |
618 | LIST_ENTRY missedPackets; | |
619 | UINT32 num = 0; | |
620 | ovsFwdCtx->switchContext->datapath.misses++; | |
621 | InitializeListHead(&missedPackets); | |
4c470e88 | 622 | status = OvsCreateAndAddPackets(NULL, 0, OVS_PACKET_CMD_MISS, vport, |
640ebde7 | 623 | &key,ovsFwdCtx->curNbl, |
a422ea1d | 624 | FALSE, &ovsFwdCtx->layers, |
640ebde7 | 625 | ovsFwdCtx->switchContext, &missedPackets, &num); |
c803536e | 626 | if (num) { |
4a3c9b70 | 627 | OvsQueuePackets(&missedPackets, num); |
c803536e SS |
628 | } |
629 | if (status == NDIS_STATUS_SUCCESS) { | |
630 | /* Complete the packet since it was copied to user buffer. */ | |
631 | OvsCompleteNBLForwardingCtx(ovsFwdCtx, | |
632 | L"OVS-Dropped since packet was copied to userspace"); | |
633 | ovsActionStats.flowMiss++; | |
634 | status = NDIS_STATUS_SUCCESS; | |
635 | } else { | |
636 | OvsCompleteNBLForwardingCtx(ovsFwdCtx, | |
637 | L"OVS-Dropped due to failure to queue to userspace"); | |
638 | status = NDIS_STATUS_FAILURE; | |
639 | ovsActionStats.failedFlowMiss++; | |
640 | } | |
641 | } | |
642 | ||
643 | return status; | |
644 | } | |
645 | ||
646 | /* | |
647 | * -------------------------------------------------------------------------- | |
648 | * OvsTunnelPortTx -- | |
649 | * The start function for Tx tunneling - encapsulates the packet, and | |
650 | * outputs the packet on the PIF bridge. | |
651 | * | |
652 | * Side effects: | |
653 | * The NBL in 'ovsFwdCtx' is consumed. | |
654 | * -------------------------------------------------------------------------- | |
655 | */ | |
656 | static __inline NDIS_STATUS | |
657 | OvsTunnelPortTx(OvsForwardingContext *ovsFwdCtx) | |
658 | { | |
659 | NDIS_STATUS status = NDIS_STATUS_FAILURE; | |
660 | PNET_BUFFER_LIST newNbl = NULL; | |
ba7283e9 SR |
661 | UINT32 srcVportNo; |
662 | NDIS_SWITCH_NIC_INDEX srcNicIndex; | |
663 | NDIS_SWITCH_PORT_ID srcPortId; | |
c803536e SS |
664 | |
665 | /* | |
666 | * Setup the source port to be the internal port to as to facilitate the | |
667 | * second OvsLookupFlow. | |
668 | */ | |
cd30b346 | 669 | if (ovsFwdCtx->switchContext->countInternalVports <= 0 || |
022c2040 | 670 | ovsFwdCtx->switchContext->virtualExternalVport == NULL) { |
ad0d70d2 EE |
671 | OvsClearTunTxCtx(ovsFwdCtx); |
672 | OvsCompleteNBLForwardingCtx(ovsFwdCtx, | |
022c2040 | 673 | L"OVS-Dropped since either internal or external port is absent"); |
ad0d70d2 EE |
674 | return NDIS_STATUS_FAILURE; |
675 | } | |
c803536e | 676 | |
cd30b346 AS |
677 | OVS_FWD_INFO switchFwdInfo = { 0 }; |
678 | /* Apply the encapsulation. The encapsulation will not consume the NBL. */ | |
c803536e | 679 | switch(ovsFwdCtx->tunnelTxNic->ovsType) { |
85571a3d AS |
680 | case OVS_VPORT_TYPE_GRE: |
681 | status = OvsEncapGre(ovsFwdCtx->tunnelTxNic, ovsFwdCtx->curNbl, | |
682 | &ovsFwdCtx->tunKey, ovsFwdCtx->switchContext, | |
cd30b346 | 683 | &ovsFwdCtx->layers, &newNbl, &switchFwdInfo); |
85571a3d | 684 | break; |
e00afcf6 | 685 | case OVS_VPORT_TYPE_VXLAN: |
0b623ad5 NR |
686 | status = OvsEncapVxlan(ovsFwdCtx->tunnelTxNic, ovsFwdCtx->curNbl, |
687 | &ovsFwdCtx->tunKey, ovsFwdCtx->switchContext, | |
cd30b346 | 688 | &ovsFwdCtx->layers, &newNbl, &switchFwdInfo); |
c803536e | 689 | break; |
022c2040 EE |
690 | case OVS_VPORT_TYPE_STT: |
691 | status = OvsEncapStt(ovsFwdCtx->tunnelTxNic, ovsFwdCtx->curNbl, | |
0b623ad5 | 692 | &ovsFwdCtx->tunKey, ovsFwdCtx->switchContext, |
cd30b346 | 693 | &ovsFwdCtx->layers, &newNbl, &switchFwdInfo); |
022c2040 | 694 | break; |
47c3123d YL |
695 | case OVS_VPORT_TYPE_GENEVE: |
696 | status = OvsEncapGeneve(ovsFwdCtx->tunnelTxNic, ovsFwdCtx->curNbl, | |
697 | &ovsFwdCtx->tunKey, ovsFwdCtx->switchContext, | |
cd30b346 | 698 | &ovsFwdCtx->layers, &newNbl, &switchFwdInfo); |
47c3123d | 699 | break; |
c803536e SS |
700 | default: |
701 | ASSERT(! "Tx: Unhandled tunnel type"); | |
702 | } | |
703 | ||
704 | /* Reset the tunnel context so that it doesn't get used after this point. */ | |
705 | OvsClearTunTxCtx(ovsFwdCtx); | |
706 | ||
cd30b346 | 707 | if (status == NDIS_STATUS_SUCCESS && switchFwdInfo.vport != NULL) { |
c803536e | 708 | ASSERT(newNbl); |
cd30b346 AS |
709 | /* |
710 | * Save the 'srcVportNo', 'srcPortId', 'srcNicIndex' so that | |
711 | * this can be applied to the new NBL later on. | |
712 | */ | |
713 | srcVportNo = switchFwdInfo.vport->portNo; | |
714 | srcPortId = switchFwdInfo.vport->portId; | |
715 | srcNicIndex = switchFwdInfo.vport->nicIndex; | |
716 | ||
c803536e SS |
717 | OvsCompleteNBLForwardingCtx(ovsFwdCtx, |
718 | L"Complete after cloning NBL for encapsulation"); | |
ba7283e9 SR |
719 | status = OvsInitForwardingCtx(ovsFwdCtx, ovsFwdCtx->switchContext, |
720 | newNbl, srcVportNo, 0, | |
721 | NET_BUFFER_LIST_SWITCH_FORWARDING_DETAIL(newNbl), | |
722 | ovsFwdCtx->completionList, | |
723 | &ovsFwdCtx->layers, FALSE); | |
c803536e | 724 | ovsFwdCtx->curNbl = newNbl; |
ba7283e9 SR |
725 | /* Update the forwarding detail for the new NBL */ |
726 | ovsFwdCtx->fwdDetail->SourcePortId = srcPortId; | |
727 | ovsFwdCtx->fwdDetail->SourceNicIndex = srcNicIndex; | |
c803536e SS |
728 | status = OvsDoFlowLookupOutput(ovsFwdCtx); |
729 | ASSERT(ovsFwdCtx->curNbl == NULL); | |
730 | } else { | |
731 | /* | |
ba7283e9 | 732 | * XXX: Temporary freeing of the packet until we register a |
c803536e SS |
733 | * callback to IP helper. |
734 | */ | |
735 | OvsCompleteNBLForwardingCtx(ovsFwdCtx, | |
736 | L"OVS-Dropped due to encap failure"); | |
737 | ovsActionStats.failedEncap++; | |
738 | status = NDIS_STATUS_SUCCESS; | |
739 | } | |
740 | ||
741 | return status; | |
742 | } | |
743 | ||
744 | /* | |
745 | * -------------------------------------------------------------------------- | |
746 | * OvsTunnelPortRx -- | |
747 | * Decapsulate the incoming NBL based on the tunnel type and goes through | |
748 | * the flow lookup for the inner packet. | |
749 | * | |
750 | * Note: IP checksum is validate here, but L4 checksum validation needs | |
751 | * to be done by the corresponding tunnel types. | |
752 | * | |
753 | * Side effects: | |
754 | * The NBL in 'ovsFwdCtx' is consumed. | |
755 | * -------------------------------------------------------------------------- | |
756 | */ | |
757 | static __inline NDIS_STATUS | |
758 | OvsTunnelPortRx(OvsForwardingContext *ovsFwdCtx) | |
759 | { | |
760 | NDIS_STATUS status = NDIS_STATUS_SUCCESS; | |
761 | PNET_BUFFER_LIST newNbl = NULL; | |
762 | POVS_VPORT_ENTRY tunnelRxVport = ovsFwdCtx->tunnelRxNic; | |
a422ea1d | 763 | PCWSTR dropReason = L"OVS-dropped due to new decap packet"; |
c803536e SS |
764 | |
765 | if (OvsValidateIPChecksum(ovsFwdCtx->curNbl, &ovsFwdCtx->layers) | |
766 | != NDIS_STATUS_SUCCESS) { | |
767 | ovsActionStats.failedChecksum++; | |
768 | OVS_LOG_INFO("Packet dropped due to IP checksum failure."); | |
769 | goto dropNbl; | |
770 | } | |
771 | ||
022c2040 EE |
772 | /* |
773 | * Decap port functions should return a new NBL if it was copied, and | |
774 | * this new NBL should be setup as the ovsFwdCtx->curNbl. | |
775 | */ | |
776 | ||
c803536e | 777 | switch(tunnelRxVport->ovsType) { |
85571a3d AS |
778 | case OVS_VPORT_TYPE_GRE: |
779 | status = OvsDecapGre(ovsFwdCtx->switchContext, ovsFwdCtx->curNbl, | |
780 | &ovsFwdCtx->tunKey, &newNbl); | |
781 | break; | |
e00afcf6 | 782 | case OVS_VPORT_TYPE_VXLAN: |
022c2040 EE |
783 | status = OvsDecapVxlan(ovsFwdCtx->switchContext, ovsFwdCtx->curNbl, |
784 | &ovsFwdCtx->tunKey, &newNbl); | |
785 | break; | |
786 | case OVS_VPORT_TYPE_STT: | |
787 | status = OvsDecapStt(ovsFwdCtx->switchContext, ovsFwdCtx->curNbl, | |
788 | &ovsFwdCtx->tunKey, &newNbl); | |
a422ea1d SV |
789 | if (status == NDIS_STATUS_SUCCESS && newNbl == NULL) { |
790 | /* This was an STT-LSO Fragment */ | |
791 | dropReason = L"OVS-STT segment is cached"; | |
792 | } | |
c803536e | 793 | break; |
47c3123d YL |
794 | case OVS_VPORT_TYPE_GENEVE: |
795 | status = OvsDecapGeneve(ovsFwdCtx->switchContext, ovsFwdCtx->curNbl, | |
796 | &ovsFwdCtx->tunKey, &newNbl); | |
797 | break; | |
c803536e SS |
798 | default: |
799 | OVS_LOG_ERROR("Rx: Unhandled tunnel type: %d\n", | |
800 | tunnelRxVport->ovsType); | |
801 | ASSERT(! "Rx: Unhandled tunnel type"); | |
802 | status = NDIS_STATUS_NOT_SUPPORTED; | |
803 | } | |
804 | ||
805 | if (status != NDIS_STATUS_SUCCESS) { | |
806 | ovsActionStats.failedDecap++; | |
807 | goto dropNbl; | |
808 | } | |
809 | ||
810 | /* | |
811 | * tunnelRxNic and other fields will be cleared, re-init the context | |
812 | * before usage. | |
813 | */ | |
a422ea1d | 814 | OvsCompleteNBLForwardingCtx(ovsFwdCtx, dropReason); |
c803536e | 815 | |
a422ea1d SV |
816 | if (newNbl) { |
817 | /* Decapsulated packet is in a new NBL */ | |
818 | ovsFwdCtx->tunnelRxNic = tunnelRxVport; | |
819 | OvsInitForwardingCtx(ovsFwdCtx, ovsFwdCtx->switchContext, | |
820 | newNbl, tunnelRxVport->portNo, 0, | |
821 | NET_BUFFER_LIST_SWITCH_FORWARDING_DETAIL(newNbl), | |
822 | ovsFwdCtx->completionList, | |
823 | &ovsFwdCtx->layers, FALSE); | |
c803536e | 824 | |
a422ea1d SV |
825 | /* |
826 | * Set the NBL's SourcePortId and SourceNicIndex to default values to | |
827 | * keep NDIS happy when we forward the packet. | |
828 | */ | |
829 | ovsFwdCtx->fwdDetail->SourcePortId = NDIS_SWITCH_DEFAULT_PORT_ID; | |
830 | ovsFwdCtx->fwdDetail->SourceNicIndex = 0; | |
c803536e | 831 | |
a422ea1d SV |
832 | status = OvsDoFlowLookupOutput(ovsFwdCtx); |
833 | } | |
c803536e SS |
834 | ASSERT(ovsFwdCtx->curNbl == NULL); |
835 | OvsClearTunRxCtx(ovsFwdCtx); | |
836 | ||
837 | return status; | |
838 | ||
839 | dropNbl: | |
840 | OvsCompleteNBLForwardingCtx(ovsFwdCtx, | |
841 | L"OVS-dropped due to decap failure"); | |
842 | OvsClearTunRxCtx(ovsFwdCtx); | |
843 | return status; | |
844 | } | |
845 | ||
846 | ||
847 | /* | |
848 | * -------------------------------------------------------------------------- | |
849 | * OvsOutputForwardingCtx -- | |
850 | * This function outputs an NBL to NDIS or to a tunneling pipeline based on | |
851 | * the ports added so far into 'ovsFwdCtx'. | |
852 | * | |
853 | * Side effects: | |
854 | * This function consumes the NBL - either by forwarding it successfully to | |
855 | * NDIS, or adding it to the completion list in 'ovsFwdCtx', or freeing it. | |
856 | * | |
857 | * Also makes sure that the list of destination ports - tunnel or otherwise is | |
858 | * drained. | |
859 | * -------------------------------------------------------------------------- | |
860 | */ | |
861 | static __inline NDIS_STATUS | |
862 | OvsOutputForwardingCtx(OvsForwardingContext *ovsFwdCtx) | |
863 | { | |
864 | NDIS_STATUS status = STATUS_SUCCESS; | |
865 | POVS_SWITCH_CONTEXT switchContext = ovsFwdCtx->switchContext; | |
eda457f1 | 866 | PCWSTR dropReason; |
c803536e SS |
867 | |
868 | /* | |
869 | * Handle the case where the some of the destination ports are tunneled | |
870 | * ports - the non-tunneled ports get a unmodified copy of the NBL, and the | |
871 | * tunneling pipeline starts when we output the packet to tunneled port. | |
872 | */ | |
873 | if (ovsFwdCtx->destPortsSizeOut > 0) { | |
874 | PNET_BUFFER_LIST newNbl = NULL; | |
875 | PNET_BUFFER nb; | |
876 | UINT32 portsToUpdate = | |
877 | ovsFwdCtx->fwdDetail->NumAvailableDestinations - | |
878 | (ovsFwdCtx->destPortsSizeIn - ovsFwdCtx->destPortsSizeOut); | |
879 | ||
880 | ASSERT(ovsFwdCtx->destinationPorts != NULL); | |
881 | ||
882 | /* | |
883 | * Create a copy of the packet in order to do encap on it later. Also, | |
884 | * don't copy the offload context since the encap'd packet has a | |
885 | * different set of headers. This will change when we implement offloads | |
886 | * before doing encapsulation. | |
887 | */ | |
888 | if (ovsFwdCtx->tunnelTxNic != NULL || ovsFwdCtx->tunnelRxNic != NULL) { | |
889 | nb = NET_BUFFER_LIST_FIRST_NB(ovsFwdCtx->curNbl); | |
890 | newNbl = OvsPartialCopyNBL(ovsFwdCtx->switchContext, ovsFwdCtx->curNbl, | |
891 | 0, 0, TRUE /*copy NBL info*/); | |
892 | if (newNbl == NULL) { | |
893 | status = NDIS_STATUS_RESOURCES; | |
894 | ovsActionStats.noCopiedNbl++; | |
eda457f1 | 895 | dropReason = L"Dropped due to failure to create NBL copy."; |
c803536e SS |
896 | goto dropit; |
897 | } | |
898 | } | |
899 | ||
900 | /* It does not seem like we'll get here unless 'portsToUpdate' > 0. */ | |
901 | ASSERT(portsToUpdate > 0); | |
902 | status = switchContext->NdisSwitchHandlers.UpdateNetBufferListDestinations( | |
903 | switchContext->NdisSwitchContext, ovsFwdCtx->curNbl, | |
904 | portsToUpdate, ovsFwdCtx->destinationPorts); | |
905 | if (status != NDIS_STATUS_SUCCESS) { | |
906 | OvsCompleteNBL(ovsFwdCtx->switchContext, newNbl, TRUE); | |
907 | ovsActionStats.cannotGrowDest++; | |
eda457f1 | 908 | dropReason = L"Dropped due to failure to update destinations."; |
c803536e SS |
909 | goto dropit; |
910 | } | |
911 | ||
912 | OvsSendNBLIngress(ovsFwdCtx->switchContext, ovsFwdCtx->curNbl, | |
913 | ovsFwdCtx->sendFlags); | |
914 | /* End this pipeline by resetting the corresponding context. */ | |
915 | ovsFwdCtx->destPortsSizeOut = 0; | |
916 | ovsFwdCtx->curNbl = NULL; | |
917 | if (newNbl) { | |
918 | status = OvsInitForwardingCtx(ovsFwdCtx, ovsFwdCtx->switchContext, | |
919 | newNbl, ovsFwdCtx->srcVportNo, 0, | |
920 | NET_BUFFER_LIST_SWITCH_FORWARDING_DETAIL(newNbl), | |
921 | ovsFwdCtx->completionList, | |
922 | &ovsFwdCtx->layers, FALSE); | |
923 | if (status != NDIS_STATUS_SUCCESS) { | |
eda457f1 | 924 | dropReason = L"Dropped due to resouces."; |
c803536e SS |
925 | goto dropit; |
926 | } | |
927 | } | |
928 | } | |
929 | ||
930 | if (ovsFwdCtx->tunnelTxNic != NULL) { | |
931 | status = OvsTunnelPortTx(ovsFwdCtx); | |
932 | ASSERT(ovsFwdCtx->tunnelTxNic == NULL); | |
933 | ASSERT(ovsFwdCtx->tunKey.dst == 0); | |
934 | } else if (ovsFwdCtx->tunnelRxNic != NULL) { | |
935 | status = OvsTunnelPortRx(ovsFwdCtx); | |
936 | ASSERT(ovsFwdCtx->tunnelRxNic == NULL); | |
937 | ASSERT(ovsFwdCtx->tunKey.dst == 0); | |
938 | } | |
939 | ASSERT(ovsFwdCtx->curNbl == NULL); | |
940 | ||
941 | return status; | |
942 | ||
943 | dropit: | |
944 | if (status != NDIS_STATUS_SUCCESS) { | |
eda457f1 | 945 | OvsCompleteNBLForwardingCtx(ovsFwdCtx, dropReason); |
c803536e SS |
946 | } |
947 | ||
948 | return status; | |
949 | } | |
950 | ||
951 | ||
952 | /* | |
953 | * -------------------------------------------------------------------------- | |
954 | * OvsLookupFlowOutput -- | |
955 | * Utility function for external callers to do flow extract, lookup, | |
956 | * actions execute on a given NBL. | |
957 | * | |
958 | * Note: If this is being used from a callback function, make sure that the | |
959 | * arguments specified are still valid in the asynchronous context. | |
960 | * | |
961 | * Side effects: | |
962 | * This function consumes the NBL. | |
963 | * -------------------------------------------------------------------------- | |
964 | */ | |
965 | VOID | |
966 | OvsLookupFlowOutput(POVS_SWITCH_CONTEXT switchContext, | |
967 | VOID *compList, | |
cd30b346 AS |
968 | PNET_BUFFER_LIST curNbl, |
969 | POVS_VPORT_ENTRY internalVport) | |
c803536e SS |
970 | { |
971 | NDIS_STATUS status; | |
972 | OvsForwardingContext ovsFwdCtx; | |
c803536e SS |
973 | |
974 | /* XXX: make sure comp list was not a stack variable previously. */ | |
975 | OvsCompletionList *completionList = (OvsCompletionList *)compList; | |
976 | ||
977 | /* | |
978 | * XXX: can internal port disappear while we are busy doing ARP resolution? | |
979 | * It could, but will we get this callback from IP helper in that case. Need | |
980 | * to check. | |
981 | */ | |
cd30b346 | 982 | ASSERT(switchContext->countInternalVports > 0); |
c803536e SS |
983 | status = OvsInitForwardingCtx(&ovsFwdCtx, switchContext, curNbl, |
984 | internalVport->portNo, 0, | |
985 | NET_BUFFER_LIST_SWITCH_FORWARDING_DETAIL(curNbl), | |
986 | completionList, NULL, TRUE); | |
987 | if (status != NDIS_STATUS_SUCCESS) { | |
988 | OvsCompleteNBLForwardingCtx(&ovsFwdCtx, | |
989 | L"OVS-Dropped due to resources"); | |
990 | return; | |
991 | } | |
992 | ||
993 | ASSERT(FALSE); | |
994 | /* | |
995 | * XXX: We need to acquire the dispatch lock and the datapath lock. | |
996 | */ | |
997 | ||
998 | OvsDoFlowLookupOutput(&ovsFwdCtx); | |
999 | } | |
1000 | ||
1001 | ||
1002 | /* | |
1003 | * -------------------------------------------------------------------------- | |
1004 | * OvsOutputBeforeSetAction -- | |
1005 | * Function to be called to complete one set of actions on an NBL, before | |
1006 | * we start the next one. | |
1007 | * -------------------------------------------------------------------------- | |
1008 | */ | |
1009 | static __inline NDIS_STATUS | |
1010 | OvsOutputBeforeSetAction(OvsForwardingContext *ovsFwdCtx) | |
1011 | { | |
1012 | PNET_BUFFER_LIST newNbl; | |
5278f698 | 1013 | NDIS_STATUS status; |
c803536e SS |
1014 | |
1015 | /* | |
1016 | * Create a copy and work on the copy after this point. The original NBL is | |
1017 | * forwarded. One reason to not use the copy for forwarding is that | |
1018 | * ports have already been added to the original NBL, and it might be | |
1019 | * inefficient/impossible to remove/re-add them to the copy. There's no | |
1020 | * notion of removing the ports, the ports need to be marked as | |
1021 | * "isExcluded". There's seems no real advantage to retaining the original | |
1022 | * and sending out the copy instead. | |
1023 | * | |
1024 | * XXX: We are copying the offload context here. This is to handle actions | |
1025 | * such as: | |
1026 | * outport, pop_vlan(), outport, push_vlan(), outport | |
1027 | * | |
1028 | * copy size needs to include inner ether + IP + TCP, need to revisit | |
1029 | * if we support IP options. | |
1030 | * XXX Head room needs to include the additional encap. | |
1031 | * XXX copySize check is not considering multiple NBs. | |
1032 | */ | |
c803536e SS |
1033 | newNbl = OvsPartialCopyNBL(ovsFwdCtx->switchContext, ovsFwdCtx->curNbl, |
1034 | 0, 0, TRUE /*copy NBL info*/); | |
1035 | ||
1036 | ASSERT(ovsFwdCtx->destPortsSizeOut > 0 || | |
1037 | ovsFwdCtx->tunnelTxNic != NULL || ovsFwdCtx->tunnelRxNic != NULL); | |
1038 | ||
ba472491 AS |
1039 | /* Send the original packet out and save the original source port number */ |
1040 | UINT32 tempVportNo = ovsFwdCtx->srcVportNo; | |
c803536e SS |
1041 | status = OvsOutputForwardingCtx(ovsFwdCtx); |
1042 | ASSERT(ovsFwdCtx->curNbl == NULL); | |
1043 | ASSERT(ovsFwdCtx->destPortsSizeOut == 0); | |
1044 | ASSERT(ovsFwdCtx->tunnelRxNic == NULL); | |
1045 | ASSERT(ovsFwdCtx->tunnelTxNic == NULL); | |
1046 | ||
1047 | /* If we didn't make a copy, can't continue. */ | |
1048 | if (newNbl == NULL) { | |
1049 | ovsActionStats.noCopiedNbl++; | |
1050 | return NDIS_STATUS_RESOURCES; | |
1051 | } | |
1052 | ||
1053 | /* Finish the remaining actions with the new NBL */ | |
1054 | if (status != NDIS_STATUS_SUCCESS) { | |
1055 | OvsCompleteNBL(ovsFwdCtx->switchContext, newNbl, TRUE); | |
1056 | } else { | |
1057 | status = OvsInitForwardingCtx(ovsFwdCtx, ovsFwdCtx->switchContext, | |
ba472491 | 1058 | newNbl, tempVportNo, 0, |
c803536e SS |
1059 | NET_BUFFER_LIST_SWITCH_FORWARDING_DETAIL(newNbl), |
1060 | ovsFwdCtx->completionList, | |
1061 | &ovsFwdCtx->layers, FALSE); | |
1062 | } | |
1063 | ||
1064 | return status; | |
1065 | } | |
1066 | ||
1067 | ||
1068 | /* | |
1069 | * -------------------------------------------------------------------------- | |
5874d571 SV |
1070 | * OvsPopFieldInPacketBuf -- |
1071 | * Function to pop a specified field of length 'shiftLength' located at | |
cd30b346 | 1072 | * 'shiftOffset' from the Ethernet header. The data on the left of the |
5874d571 SV |
1073 | * 'shiftOffset' is right shifted. |
1074 | * | |
1075 | * Returns a pointer to the new start in 'bufferData'. | |
c803536e SS |
1076 | * -------------------------------------------------------------------------- |
1077 | */ | |
1078 | static __inline NDIS_STATUS | |
5874d571 SV |
1079 | OvsPopFieldInPacketBuf(OvsForwardingContext *ovsFwdCtx, |
1080 | UINT32 shiftOffset, | |
1081 | UINT32 shiftLength, | |
1082 | PUINT8 *bufferData) | |
c803536e SS |
1083 | { |
1084 | PNET_BUFFER curNb; | |
1085 | PMDL curMdl; | |
1086 | PUINT8 bufferStart; | |
c803536e SS |
1087 | UINT32 packetLen, mdlLen; |
1088 | PNET_BUFFER_LIST newNbl; | |
1089 | NDIS_STATUS status; | |
c803536e SS |
1090 | |
1091 | newNbl = OvsPartialCopyNBL(ovsFwdCtx->switchContext, ovsFwdCtx->curNbl, | |
1092 | 0, 0, TRUE /* copy NBL info */); | |
1093 | if (!newNbl) { | |
1094 | ovsActionStats.noCopiedNbl++; | |
1095 | return NDIS_STATUS_RESOURCES; | |
1096 | } | |
1097 | ||
1098 | /* Complete the original NBL and create a copy to modify. */ | |
1099 | OvsCompleteNBLForwardingCtx(ovsFwdCtx, L"OVS-Dropped due to copy"); | |
1100 | ||
5874d571 SV |
1101 | status = OvsInitForwardingCtx(ovsFwdCtx, ovsFwdCtx->switchContext, newNbl, |
1102 | ovsFwdCtx->srcVportNo, 0, | |
c803536e SS |
1103 | NET_BUFFER_LIST_SWITCH_FORWARDING_DETAIL(newNbl), |
1104 | NULL, &ovsFwdCtx->layers, FALSE); | |
1105 | if (status != NDIS_STATUS_SUCCESS) { | |
1106 | OvsCompleteNBLForwardingCtx(ovsFwdCtx, | |
1107 | L"Dropped due to resouces"); | |
1108 | return NDIS_STATUS_RESOURCES; | |
1109 | } | |
1110 | ||
1111 | curNb = NET_BUFFER_LIST_FIRST_NB(ovsFwdCtx->curNbl); | |
1112 | packetLen = NET_BUFFER_DATA_LENGTH(curNb); | |
1113 | ASSERT(curNb->Next == NULL); | |
1114 | curMdl = NET_BUFFER_CURRENT_MDL(curNb); | |
1115 | NdisQueryMdl(curMdl, &bufferStart, &mdlLen, LowPagePriority); | |
1116 | if (!bufferStart) { | |
1117 | return NDIS_STATUS_RESOURCES; | |
1118 | } | |
1119 | mdlLen -= NET_BUFFER_CURRENT_MDL_OFFSET(curNb); | |
5874d571 SV |
1120 | /* Bail out if L2 + shiftLength is not contiguous in the first buffer. */ |
1121 | if (MIN(packetLen, mdlLen) < sizeof(EthHdr) + shiftLength) { | |
c803536e SS |
1122 | ASSERT(FALSE); |
1123 | return NDIS_STATUS_FAILURE; | |
1124 | } | |
1125 | bufferStart += NET_BUFFER_CURRENT_MDL_OFFSET(curNb); | |
fb7c468b AS |
1126 | /* XXX At the momemnt !bufferData means it should be treated as VLAN. We |
1127 | * should split the function and refactor. */ | |
1128 | if (!bufferData) { | |
1129 | EthHdr *ethHdr = (EthHdr *)bufferStart; | |
1130 | /* If the frame is not VLAN make it a no op */ | |
1131 | if (ethHdr->Type != ETH_TYPE_802_1PQ_NBO) { | |
1132 | return NDIS_STATUS_SUCCESS; | |
1133 | } | |
1134 | } | |
1135 | RtlMoveMemory(bufferStart + shiftLength, bufferStart, shiftOffset); | |
c803536e SS |
1136 | NdisAdvanceNetBufferDataStart(curNb, shiftLength, FALSE, NULL); |
1137 | ||
5874d571 SV |
1138 | if (bufferData) { |
1139 | *bufferData = bufferStart + shiftLength; | |
1140 | } | |
1141 | ||
1142 | return NDIS_STATUS_SUCCESS; | |
1143 | } | |
1144 | ||
1145 | ||
1146 | /* | |
1147 | * -------------------------------------------------------------------------- | |
1148 | * OvsPopVlanInPktBuf -- | |
1149 | * Function to pop a VLAN tag when the tag is in the packet buffer. | |
1150 | * -------------------------------------------------------------------------- | |
1151 | */ | |
1152 | static __inline NDIS_STATUS | |
1153 | OvsPopVlanInPktBuf(OvsForwardingContext *ovsFwdCtx) | |
1154 | { | |
1155 | /* | |
1156 | * Declare a dummy vlanTag structure since we need to compute the size | |
1157 | * of shiftLength. The NDIS one is a unionized structure. | |
1158 | */ | |
1159 | NDIS_PACKET_8021Q_INFO vlanTag = {0}; | |
1160 | UINT32 shiftLength = sizeof(vlanTag.TagHeader); | |
1161 | UINT32 shiftOffset = sizeof(DL_EUI48) + sizeof(DL_EUI48); | |
1162 | ||
1163 | return OvsPopFieldInPacketBuf(ovsFwdCtx, shiftOffset, shiftLength, NULL); | |
1164 | } | |
1165 | ||
1166 | ||
1167 | /* | |
1168 | * -------------------------------------------------------------------------- | |
1169 | * OvsActionMplsPop -- | |
1170 | * Function to pop the first MPLS label from the current packet. | |
1171 | * -------------------------------------------------------------------------- | |
1172 | */ | |
1173 | static __inline NDIS_STATUS | |
1174 | OvsActionMplsPop(OvsForwardingContext *ovsFwdCtx, | |
1175 | ovs_be16 ethertype) | |
1176 | { | |
5278f698 | 1177 | NDIS_STATUS status; |
5874d571 SV |
1178 | OVS_PACKET_HDR_INFO *layers = &ovsFwdCtx->layers; |
1179 | EthHdr *ethHdr = NULL; | |
1180 | ||
1181 | status = OvsPopFieldInPacketBuf(ovsFwdCtx, sizeof(*ethHdr), | |
1182 | MPLS_HLEN, (PUINT8*)ðHdr); | |
1183 | if (status == NDIS_STATUS_SUCCESS) { | |
1184 | if (ethHdr && OvsEthertypeIsMpls(ethHdr->Type)) { | |
1185 | ethHdr->Type = ethertype; | |
1186 | } | |
1187 | ||
1188 | layers->l3Offset -= MPLS_HLEN; | |
1189 | layers->l4Offset -= MPLS_HLEN; | |
1190 | } | |
1191 | ||
1192 | return status; | |
1193 | } | |
1194 | ||
1195 | ||
1196 | /* | |
1197 | * -------------------------------------------------------------------------- | |
1198 | * OvsActionMplsPush -- | |
1199 | * Function to push the MPLS label into the current packet. | |
1200 | * -------------------------------------------------------------------------- | |
1201 | */ | |
1202 | static __inline NDIS_STATUS | |
1203 | OvsActionMplsPush(OvsForwardingContext *ovsFwdCtx, | |
1204 | const struct ovs_action_push_mpls *mpls) | |
1205 | { | |
1206 | NDIS_STATUS status; | |
1207 | PNET_BUFFER curNb = NULL; | |
1208 | PMDL curMdl = NULL; | |
1209 | PUINT8 bufferStart = NULL; | |
1210 | OVS_PACKET_HDR_INFO *layers = &ovsFwdCtx->layers; | |
1211 | EthHdr *ethHdr = NULL; | |
1212 | MPLSHdr *mplsHdr = NULL; | |
1213 | UINT32 mdlLen = 0, curMdlOffset = 0; | |
1214 | PNET_BUFFER_LIST newNbl; | |
1215 | ||
1216 | newNbl = OvsPartialCopyNBL(ovsFwdCtx->switchContext, ovsFwdCtx->curNbl, | |
1217 | layers->l3Offset, MPLS_HLEN, TRUE); | |
1218 | if (!newNbl) { | |
1219 | ovsActionStats.noCopiedNbl++; | |
1220 | return NDIS_STATUS_RESOURCES; | |
1221 | } | |
1222 | OvsCompleteNBLForwardingCtx(ovsFwdCtx, | |
1223 | L"Complete after partial copy."); | |
1224 | ||
1225 | status = OvsInitForwardingCtx(ovsFwdCtx, ovsFwdCtx->switchContext, | |
1226 | newNbl, ovsFwdCtx->srcVportNo, 0, | |
1227 | NET_BUFFER_LIST_SWITCH_FORWARDING_DETAIL(newNbl), | |
1228 | NULL, &ovsFwdCtx->layers, FALSE); | |
1229 | if (status != NDIS_STATUS_SUCCESS) { | |
1230 | OvsCompleteNBLForwardingCtx(ovsFwdCtx, | |
1231 | L"OVS-Dropped due to resources"); | |
1232 | return NDIS_STATUS_RESOURCES; | |
1233 | } | |
1234 | ||
1235 | curNb = NET_BUFFER_LIST_FIRST_NB(ovsFwdCtx->curNbl); | |
1236 | ASSERT(curNb->Next == NULL); | |
1237 | ||
1238 | status = NdisRetreatNetBufferDataStart(curNb, MPLS_HLEN, 0, NULL); | |
1239 | if (status != NDIS_STATUS_SUCCESS) { | |
1240 | return status; | |
1241 | } | |
1242 | ||
1243 | curMdl = NET_BUFFER_CURRENT_MDL(curNb); | |
1244 | NdisQueryMdl(curMdl, &bufferStart, &mdlLen, LowPagePriority); | |
1245 | if (!curMdl) { | |
1246 | ovsActionStats.noResource++; | |
1247 | return NDIS_STATUS_RESOURCES; | |
1248 | } | |
1249 | ||
1250 | curMdlOffset = NET_BUFFER_CURRENT_MDL_OFFSET(curNb); | |
1251 | mdlLen -= curMdlOffset; | |
1252 | ASSERT(mdlLen >= MPLS_HLEN); | |
1253 | ||
1254 | ethHdr = (EthHdr *)(bufferStart + curMdlOffset); | |
1255 | RtlMoveMemory(ethHdr, (UINT8*)ethHdr + MPLS_HLEN, sizeof(*ethHdr)); | |
1256 | ethHdr->Type = mpls->mpls_ethertype; | |
1257 | ||
1258 | mplsHdr = (MPLSHdr *)(ethHdr + 1); | |
1259 | mplsHdr->lse = mpls->mpls_lse; | |
1260 | ||
1261 | layers->l3Offset += MPLS_HLEN; | |
1262 | layers->l4Offset += MPLS_HLEN; | |
1263 | ||
c803536e SS |
1264 | return NDIS_STATUS_SUCCESS; |
1265 | } | |
1266 | ||
c803536e SS |
1267 | /* |
1268 | *---------------------------------------------------------------------------- | |
1269 | * OvsUpdateEthHeader -- | |
1270 | * Updates the ethernet header in ovsFwdCtx.curNbl inline based on the | |
1271 | * specified key. | |
1272 | *---------------------------------------------------------------------------- | |
1273 | */ | |
1274 | static __inline NDIS_STATUS | |
1275 | OvsUpdateEthHeader(OvsForwardingContext *ovsFwdCtx, | |
1276 | const struct ovs_key_ethernet *ethAttr) | |
1277 | { | |
1278 | PNET_BUFFER curNb; | |
1279 | PMDL curMdl; | |
1280 | PUINT8 bufferStart; | |
1281 | EthHdr *ethHdr; | |
1282 | UINT32 packetLen, mdlLen; | |
1283 | ||
1284 | curNb = NET_BUFFER_LIST_FIRST_NB(ovsFwdCtx->curNbl); | |
1285 | ASSERT(curNb->Next == NULL); | |
1286 | packetLen = NET_BUFFER_DATA_LENGTH(curNb); | |
1287 | curMdl = NET_BUFFER_CURRENT_MDL(curNb); | |
1288 | NdisQueryMdl(curMdl, &bufferStart, &mdlLen, LowPagePriority); | |
1289 | if (!bufferStart) { | |
1290 | ovsActionStats.noResource++; | |
1291 | return NDIS_STATUS_RESOURCES; | |
1292 | } | |
1293 | mdlLen -= NET_BUFFER_CURRENT_MDL_OFFSET(curNb); | |
1294 | ASSERT(mdlLen > 0); | |
1295 | /* Bail out if the L2 header is not in a contiguous buffer. */ | |
1296 | if (MIN(packetLen, mdlLen) < sizeof *ethHdr) { | |
1297 | ASSERT(FALSE); | |
1298 | return NDIS_STATUS_FAILURE; | |
1299 | } | |
1300 | ethHdr = (EthHdr *)(bufferStart + NET_BUFFER_CURRENT_MDL_OFFSET(curNb)); | |
1301 | ||
1302 | RtlCopyMemory(ethHdr->Destination, ethAttr->eth_dst, | |
1303 | sizeof ethHdr->Destination); | |
1304 | RtlCopyMemory(ethHdr->Source, ethAttr->eth_src, sizeof ethHdr->Source); | |
1305 | ||
1306 | return NDIS_STATUS_SUCCESS; | |
1307 | } | |
1308 | ||
1309 | /* | |
1310 | *---------------------------------------------------------------------------- | |
1a2bea5d AS |
1311 | * OvsGetHeaderBySize -- |
1312 | * Tries to retrieve a continuous buffer from 'ovsFwdCtx->curnbl' of size | |
1313 | * 'size'. | |
1314 | * If the original buffer is insufficient it will, try to clone the net | |
1315 | * buffer list and force the size. | |
1316 | * Returns 'NULL' on failure or a pointer to the first byte of the data | |
1317 | * in the first net buffer of the net buffer list 'nbl'. | |
c803536e SS |
1318 | *---------------------------------------------------------------------------- |
1319 | */ | |
1a2bea5d AS |
1320 | PUINT8 OvsGetHeaderBySize(OvsForwardingContext *ovsFwdCtx, |
1321 | UINT32 size) | |
c803536e SS |
1322 | { |
1323 | PNET_BUFFER curNb; | |
1a2bea5d | 1324 | UINT32 mdlLen, packetLen; |
c803536e SS |
1325 | PMDL curMdl; |
1326 | ULONG curMdlOffset; | |
1a2bea5d | 1327 | PUINT8 start; |
c803536e | 1328 | |
c803536e SS |
1329 | curNb = NET_BUFFER_LIST_FIRST_NB(ovsFwdCtx->curNbl); |
1330 | ASSERT(curNb->Next == NULL); | |
1331 | packetLen = NET_BUFFER_DATA_LENGTH(curNb); | |
1332 | curMdl = NET_BUFFER_CURRENT_MDL(curNb); | |
1a2bea5d AS |
1333 | NdisQueryMdl(curMdl, &start, &mdlLen, LowPagePriority); |
1334 | if (!start) { | |
c803536e | 1335 | ovsActionStats.noResource++; |
1a2bea5d | 1336 | return NULL; |
c803536e | 1337 | } |
1a2bea5d | 1338 | |
c803536e SS |
1339 | curMdlOffset = NET_BUFFER_CURRENT_MDL_OFFSET(curNb); |
1340 | mdlLen -= curMdlOffset; | |
1341 | ASSERT((INT)mdlLen >= 0); | |
1342 | ||
c803536e SS |
1343 | /* Count of number of bytes of valid data there are in the first MDL. */ |
1344 | mdlLen = MIN(packetLen, mdlLen); | |
1a2bea5d | 1345 | if (mdlLen < size) { |
c803536e | 1346 | PNET_BUFFER_LIST newNbl; |
1a2bea5d | 1347 | NDIS_STATUS status; |
c803536e | 1348 | newNbl = OvsPartialCopyNBL(ovsFwdCtx->switchContext, ovsFwdCtx->curNbl, |
1a2bea5d | 1349 | size, 0, TRUE /*copy NBL info*/); |
c803536e SS |
1350 | if (!newNbl) { |
1351 | ovsActionStats.noCopiedNbl++; | |
1a2bea5d | 1352 | return NULL; |
c803536e SS |
1353 | } |
1354 | OvsCompleteNBLForwardingCtx(ovsFwdCtx, | |
1355 | L"Complete after partial copy."); | |
1356 | ||
1357 | status = OvsInitForwardingCtx(ovsFwdCtx, ovsFwdCtx->switchContext, | |
1358 | newNbl, ovsFwdCtx->srcVportNo, 0, | |
1359 | NET_BUFFER_LIST_SWITCH_FORWARDING_DETAIL(newNbl), | |
1360 | NULL, &ovsFwdCtx->layers, FALSE); | |
1a2bea5d | 1361 | |
c803536e SS |
1362 | if (status != NDIS_STATUS_SUCCESS) { |
1363 | OvsCompleteNBLForwardingCtx(ovsFwdCtx, | |
1364 | L"OVS-Dropped due to resources"); | |
1a2bea5d | 1365 | return NULL; |
c803536e SS |
1366 | } |
1367 | ||
1368 | curNb = NET_BUFFER_LIST_FIRST_NB(ovsFwdCtx->curNbl); | |
1369 | ASSERT(curNb->Next == NULL); | |
1370 | curMdl = NET_BUFFER_CURRENT_MDL(curNb); | |
1a2bea5d | 1371 | NdisQueryMdl(curMdl, &start, &mdlLen, LowPagePriority); |
c803536e SS |
1372 | if (!curMdl) { |
1373 | ovsActionStats.noResource++; | |
1a2bea5d | 1374 | return NULL; |
c803536e SS |
1375 | } |
1376 | curMdlOffset = NET_BUFFER_CURRENT_MDL_OFFSET(curNb); | |
1377 | mdlLen -= curMdlOffset; | |
1a2bea5d | 1378 | ASSERT(mdlLen >= size); |
c803536e | 1379 | } |
1a2bea5d AS |
1380 | |
1381 | return start + curMdlOffset; | |
1382 | } | |
1383 | ||
dd71a1dd AS |
1384 | /* |
1385 | *---------------------------------------------------------------------------- | |
1386 | * OvsUpdateUdpPorts -- | |
1387 | * Updates the UDP source or destination port in ovsFwdCtx.curNbl inline | |
1388 | * based on the specified key. | |
1389 | *---------------------------------------------------------------------------- | |
1390 | */ | |
1391 | static __inline NDIS_STATUS | |
1392 | OvsUpdateUdpPorts(OvsForwardingContext *ovsFwdCtx, | |
1393 | const struct ovs_key_udp *udpAttr) | |
1394 | { | |
1395 | PUINT8 bufferStart; | |
1396 | OVS_PACKET_HDR_INFO *layers = &ovsFwdCtx->layers; | |
1397 | UDPHdr *udpHdr = NULL; | |
1398 | ||
1399 | ASSERT(layers->value != 0); | |
1400 | ||
1401 | if (!layers->isUdp) { | |
1402 | ovsActionStats.noCopiedNbl++; | |
1403 | return NDIS_STATUS_FAILURE; | |
1404 | } | |
1405 | ||
1406 | bufferStart = OvsGetHeaderBySize(ovsFwdCtx, layers->l7Offset); | |
1407 | if (!bufferStart) { | |
1408 | return NDIS_STATUS_RESOURCES; | |
1409 | } | |
1410 | ||
1411 | udpHdr = (UDPHdr *)(bufferStart + layers->l4Offset); | |
1412 | if (udpHdr->check) { | |
1413 | if (udpHdr->source != udpAttr->udp_src) { | |
1414 | udpHdr->check = ChecksumUpdate16(udpHdr->check, udpHdr->source, | |
1415 | udpAttr->udp_src); | |
1416 | udpHdr->source = udpAttr->udp_src; | |
1417 | } | |
1418 | if (udpHdr->dest != udpAttr->udp_dst) { | |
1419 | udpHdr->check = ChecksumUpdate16(udpHdr->check, udpHdr->dest, | |
1420 | udpAttr->udp_dst); | |
1421 | udpHdr->dest = udpAttr->udp_dst; | |
1422 | } | |
1423 | } else { | |
1424 | udpHdr->source = udpAttr->udp_src; | |
1425 | udpHdr->dest = udpAttr->udp_dst; | |
1426 | } | |
1427 | ||
1428 | return NDIS_STATUS_SUCCESS; | |
1429 | } | |
1a2bea5d | 1430 | |
a9fee2f8 AS |
1431 | /* |
1432 | *---------------------------------------------------------------------------- | |
1433 | * OvsUpdateTcpPorts -- | |
1434 | * Updates the TCP source or destination port in ovsFwdCtx.curNbl inline | |
1435 | * based on the specified key. | |
1436 | *---------------------------------------------------------------------------- | |
1437 | */ | |
1438 | static __inline NDIS_STATUS | |
1439 | OvsUpdateTcpPorts(OvsForwardingContext *ovsFwdCtx, | |
1440 | const struct ovs_key_tcp *tcpAttr) | |
1441 | { | |
1442 | PUINT8 bufferStart; | |
1443 | OVS_PACKET_HDR_INFO *layers = &ovsFwdCtx->layers; | |
1444 | TCPHdr *tcpHdr = NULL; | |
1445 | ||
1446 | ASSERT(layers->value != 0); | |
1447 | ||
1448 | if (!layers->isTcp) { | |
1449 | ovsActionStats.noCopiedNbl++; | |
1450 | return NDIS_STATUS_FAILURE; | |
1451 | } | |
1452 | ||
1453 | bufferStart = OvsGetHeaderBySize(ovsFwdCtx, layers->l7Offset); | |
1454 | if (!bufferStart) { | |
1455 | return NDIS_STATUS_RESOURCES; | |
1456 | } | |
1457 | ||
1458 | tcpHdr = (TCPHdr *)(bufferStart + layers->l4Offset); | |
1459 | ||
1460 | if (tcpHdr->source != tcpAttr->tcp_src) { | |
1461 | tcpHdr->check = ChecksumUpdate16(tcpHdr->check, tcpHdr->source, | |
1462 | tcpAttr->tcp_src); | |
1463 | tcpHdr->source = tcpAttr->tcp_src; | |
1464 | } | |
1465 | if (tcpHdr->dest != tcpAttr->tcp_dst) { | |
1466 | tcpHdr->check = ChecksumUpdate16(tcpHdr->check, tcpHdr->dest, | |
1467 | tcpAttr->tcp_dst); | |
1468 | tcpHdr->dest = tcpAttr->tcp_dst; | |
1469 | } | |
1470 | ||
1471 | return NDIS_STATUS_SUCCESS; | |
1472 | } | |
1473 | ||
1a2bea5d AS |
1474 | /* |
1475 | *---------------------------------------------------------------------------- | |
1476 | * OvsUpdateIPv4Header -- | |
1477 | * Updates the IPv4 header in ovsFwdCtx.curNbl inline based on the | |
1478 | * specified key. | |
1479 | *---------------------------------------------------------------------------- | |
1480 | */ | |
1481 | static __inline NDIS_STATUS | |
1482 | OvsUpdateIPv4Header(OvsForwardingContext *ovsFwdCtx, | |
1483 | const struct ovs_key_ipv4 *ipAttr) | |
1484 | { | |
1485 | PUINT8 bufferStart; | |
1486 | UINT32 hdrSize; | |
1487 | OVS_PACKET_HDR_INFO *layers = &ovsFwdCtx->layers; | |
1488 | IPHdr *ipHdr; | |
1489 | TCPHdr *tcpHdr = NULL; | |
1490 | UDPHdr *udpHdr = NULL; | |
1491 | ||
1492 | ASSERT(layers->value != 0); | |
1493 | ||
1494 | if (layers->isTcp || layers->isUdp) { | |
1495 | hdrSize = layers->l4Offset + | |
1496 | layers->isTcp ? sizeof (*tcpHdr) : sizeof (*udpHdr); | |
1497 | } else { | |
1498 | hdrSize = layers->l3Offset + sizeof (*ipHdr); | |
1499 | } | |
1500 | ||
1501 | bufferStart = OvsGetHeaderBySize(ovsFwdCtx, hdrSize); | |
1502 | if (!bufferStart) { | |
1503 | return NDIS_STATUS_RESOURCES; | |
1504 | } | |
1505 | ||
e5c6c7f5 | 1506 | ipHdr = (IPHdr *)(bufferStart + layers->l3Offset); |
c803536e SS |
1507 | |
1508 | if (layers->isTcp) { | |
e5c6c7f5 | 1509 | tcpHdr = (TCPHdr *)(bufferStart + layers->l4Offset); |
c803536e | 1510 | } else if (layers->isUdp) { |
e5c6c7f5 | 1511 | udpHdr = (UDPHdr *)(bufferStart + layers->l4Offset); |
c803536e SS |
1512 | } |
1513 | ||
1514 | /* | |
790e2d4b | 1515 | * Adjust the IP header inline as dictated by the action, and also update |
c803536e SS |
1516 | * the IP and the TCP checksum for the data modified. |
1517 | * | |
1518 | * In the future, this could be optimized to make one call to | |
1519 | * ChecksumUpdate32(). Ignoring this for now, since for the most common | |
1520 | * case, we only update the TTL. | |
1521 | */ | |
1522 | if (ipHdr->saddr != ipAttr->ipv4_src) { | |
1523 | if (tcpHdr) { | |
1524 | tcpHdr->check = ChecksumUpdate32(tcpHdr->check, ipHdr->saddr, | |
1525 | ipAttr->ipv4_src); | |
1526 | } else if (udpHdr && udpHdr->check) { | |
1527 | udpHdr->check = ChecksumUpdate32(udpHdr->check, ipHdr->saddr, | |
1528 | ipAttr->ipv4_src); | |
1529 | } | |
1530 | ||
1531 | if (ipHdr->check != 0) { | |
1532 | ipHdr->check = ChecksumUpdate32(ipHdr->check, ipHdr->saddr, | |
1533 | ipAttr->ipv4_src); | |
1534 | } | |
1535 | ipHdr->saddr = ipAttr->ipv4_src; | |
1536 | } | |
1537 | if (ipHdr->daddr != ipAttr->ipv4_dst) { | |
1538 | if (tcpHdr) { | |
1539 | tcpHdr->check = ChecksumUpdate32(tcpHdr->check, ipHdr->daddr, | |
1540 | ipAttr->ipv4_dst); | |
1541 | } else if (udpHdr && udpHdr->check) { | |
1542 | udpHdr->check = ChecksumUpdate32(udpHdr->check, ipHdr->daddr, | |
1543 | ipAttr->ipv4_dst); | |
1544 | } | |
1545 | ||
1546 | if (ipHdr->check != 0) { | |
1547 | ipHdr->check = ChecksumUpdate32(ipHdr->check, ipHdr->daddr, | |
1548 | ipAttr->ipv4_dst); | |
1549 | } | |
1550 | ipHdr->daddr = ipAttr->ipv4_dst; | |
1551 | } | |
1552 | if (ipHdr->protocol != ipAttr->ipv4_proto) { | |
1553 | UINT16 oldProto = (ipHdr->protocol << 16) & 0xff00; | |
1554 | UINT16 newProto = (ipAttr->ipv4_proto << 16) & 0xff00; | |
1555 | if (tcpHdr) { | |
1556 | tcpHdr->check = ChecksumUpdate16(tcpHdr->check, oldProto, newProto); | |
1557 | } else if (udpHdr && udpHdr->check) { | |
1558 | udpHdr->check = ChecksumUpdate16(udpHdr->check, oldProto, newProto); | |
1559 | } | |
1560 | ||
1561 | if (ipHdr->check != 0) { | |
1562 | ipHdr->check = ChecksumUpdate16(ipHdr->check, oldProto, newProto); | |
1563 | } | |
1564 | ipHdr->protocol = ipAttr->ipv4_proto; | |
1565 | } | |
1566 | if (ipHdr->ttl != ipAttr->ipv4_ttl) { | |
1567 | UINT16 oldTtl = (ipHdr->ttl) & 0xff; | |
1568 | UINT16 newTtl = (ipAttr->ipv4_ttl) & 0xff; | |
1569 | if (ipHdr->check != 0) { | |
1570 | ipHdr->check = ChecksumUpdate16(ipHdr->check, oldTtl, newTtl); | |
1571 | } | |
1572 | ipHdr->ttl = ipAttr->ipv4_ttl; | |
1573 | } | |
1574 | ||
1575 | return NDIS_STATUS_SUCCESS; | |
1576 | } | |
1577 | ||
1578 | /* | |
1579 | * -------------------------------------------------------------------------- | |
1580 | * OvsExecuteSetAction -- | |
1581 | * Executes a set() action, but storing the actions into 'ovsFwdCtx' | |
1582 | * -------------------------------------------------------------------------- | |
1583 | */ | |
1584 | static __inline NDIS_STATUS | |
1585 | OvsExecuteSetAction(OvsForwardingContext *ovsFwdCtx, | |
1586 | OvsFlowKey *key, | |
1587 | UINT64 *hash, | |
d838e577 | 1588 | const PNL_ATTR a) |
c803536e | 1589 | { |
d838e577 | 1590 | enum ovs_key_attr type = NlAttrType(a); |
c803536e SS |
1591 | NDIS_STATUS status = NDIS_STATUS_SUCCESS; |
1592 | ||
1593 | switch (type) { | |
1594 | case OVS_KEY_ATTR_ETHERNET: | |
1595 | status = OvsUpdateEthHeader(ovsFwdCtx, | |
d838e577 | 1596 | NlAttrGetUnspec(a, sizeof(struct ovs_key_ethernet))); |
c803536e SS |
1597 | break; |
1598 | ||
1599 | case OVS_KEY_ATTR_IPV4: | |
1600 | status = OvsUpdateIPv4Header(ovsFwdCtx, | |
d838e577 | 1601 | NlAttrGetUnspec(a, sizeof(struct ovs_key_ipv4))); |
c803536e SS |
1602 | break; |
1603 | ||
1604 | case OVS_KEY_ATTR_TUNNEL: | |
1605 | { | |
1606 | OvsIPv4TunnelKey tunKey; | |
47c3123d YL |
1607 | NTSTATUS convertStatus = OvsTunnelAttrToIPv4TunnelKey((PNL_ATTR)a, &tunKey); |
1608 | status = SUCCEEDED(convertStatus) ? NDIS_STATUS_SUCCESS : NDIS_STATUS_FAILURE; | |
c803536e SS |
1609 | ASSERT(status == NDIS_STATUS_SUCCESS); |
1610 | tunKey.flow_hash = (uint16)(hash ? *hash : OvsHashFlow(key)); | |
ffde5f8f | 1611 | tunKey.dst_port = key->ipKey.l4.tpDst; |
c803536e | 1612 | RtlCopyMemory(&ovsFwdCtx->tunKey, &tunKey, sizeof ovsFwdCtx->tunKey); |
c803536e SS |
1613 | break; |
1614 | } | |
4ac06450 | 1615 | |
dd71a1dd AS |
1616 | case OVS_KEY_ATTR_UDP: |
1617 | status = OvsUpdateUdpPorts(ovsFwdCtx, | |
1618 | NlAttrGetUnspec(a, sizeof(struct ovs_key_udp))); | |
1619 | break; | |
1620 | ||
a9fee2f8 AS |
1621 | case OVS_KEY_ATTR_TCP: |
1622 | status = OvsUpdateTcpPorts(ovsFwdCtx, | |
1623 | NlAttrGetUnspec(a, sizeof(struct ovs_key_tcp))); | |
1624 | break; | |
1625 | ||
c803536e | 1626 | default: |
4ac06450 | 1627 | OVS_LOG_INFO("Unhandled attribute %#x", type); |
3819692e | 1628 | break; |
c803536e SS |
1629 | } |
1630 | return status; | |
1631 | } | |
1632 | ||
1633 | /* | |
1634 | * -------------------------------------------------------------------------- | |
ee25964a SV |
1635 | * OvsExecuteRecirc -- |
1636 | * The function adds a deferred action to allow the current packet, nbl, | |
1637 | * to re-enter datapath packet processing. | |
1638 | * -------------------------------------------------------------------------- | |
1639 | */ | |
1640 | NDIS_STATUS | |
1641 | OvsExecuteRecirc(OvsForwardingContext *ovsFwdCtx, | |
1642 | OvsFlowKey *key, | |
1643 | const PNL_ATTR actions, | |
1644 | int rem) | |
1645 | { | |
1646 | POVS_DEFERRED_ACTION deferredAction = NULL; | |
1647 | PNET_BUFFER_LIST newNbl = NULL; | |
1648 | ||
1649 | if (!NlAttrIsLast(actions, rem)) { | |
1650 | /* | |
1651 | * Recirc action is the not the last action of the action list, so we | |
1652 | * need to clone the packet. | |
1653 | */ | |
1654 | newNbl = OvsPartialCopyNBL(ovsFwdCtx->switchContext, ovsFwdCtx->curNbl, | |
1655 | 0, 0, TRUE /*copy NBL info*/); | |
1656 | /* | |
1657 | * Skip the recirc action when out of memory, but continue on with the | |
1658 | * rest of the action list. | |
1659 | */ | |
1660 | if (newNbl == NULL) { | |
1661 | ovsActionStats.noCopiedNbl++; | |
1662 | return NDIS_STATUS_SUCCESS; | |
1663 | } | |
ee25964a SV |
1664 | } |
1665 | ||
ac933282 SV |
1666 | if (newNbl) { |
1667 | deferredAction = OvsAddDeferredActions(newNbl, key, NULL); | |
1668 | } else { | |
1669 | deferredAction = OvsAddDeferredActions(ovsFwdCtx->curNbl, key, NULL); | |
1670 | } | |
1671 | ||
ee25964a SV |
1672 | if (deferredAction) { |
1673 | deferredAction->key.recircId = NlAttrGetU32(actions); | |
1674 | } else { | |
1675 | if (newNbl) { | |
1676 | ovsActionStats.deferredActionsQueueFull++; | |
1677 | OvsCompleteNBL(ovsFwdCtx->switchContext, newNbl, TRUE); | |
1678 | } | |
1679 | } | |
1680 | ||
1681 | return NDIS_STATUS_SUCCESS; | |
1682 | } | |
1683 | ||
245eedef SV |
1684 | /* |
1685 | * -------------------------------------------------------------------------- | |
1686 | * OvsExecuteHash -- | |
1687 | * The function updates datapath hash read from userspace. | |
1688 | * -------------------------------------------------------------------------- | |
1689 | */ | |
1690 | VOID | |
1691 | OvsExecuteHash(OvsFlowKey *key, | |
1692 | const PNL_ATTR attr) | |
1693 | { | |
1694 | struct ovs_action_hash *hash_act = NlAttrData(attr); | |
1695 | UINT32 hash = 0; | |
1696 | ||
1697 | hash = (UINT32)OvsHashFlow(key); | |
1698 | hash = OvsJhashWords(&hash, 1, hash_act->hash_basis); | |
1699 | if (!hash) | |
1700 | hash = 1; | |
1701 | ||
1702 | key->dpHash = hash; | |
1703 | } | |
1704 | ||
9d36ca82 SV |
1705 | /* |
1706 | * -------------------------------------------------------------------------- | |
1707 | * OvsOutputUserspaceAction -- | |
1708 | * This function sends the packet to userspace according to nested | |
1709 | * %OVS_USERSPACE_ATTR_* attributes. | |
1710 | * -------------------------------------------------------------------------- | |
1711 | */ | |
1712 | static __inline NDIS_STATUS | |
1713 | OvsOutputUserspaceAction(OvsForwardingContext *ovsFwdCtx, | |
1714 | OvsFlowKey *key, | |
1715 | const PNL_ATTR attr) | |
1716 | { | |
1717 | NTSTATUS status = NDIS_STATUS_SUCCESS; | |
1718 | PNL_ATTR userdataAttr; | |
1719 | PNL_ATTR queueAttr; | |
1720 | POVS_PACKET_QUEUE_ELEM elem; | |
1721 | POVS_PACKET_HDR_INFO layers = &ovsFwdCtx->layers; | |
1722 | BOOLEAN isRecv = FALSE; | |
1723 | ||
1724 | POVS_VPORT_ENTRY vport = OvsFindVportByPortNo(ovsFwdCtx->switchContext, | |
1725 | ovsFwdCtx->srcVportNo); | |
1726 | ||
1727 | if (vport) { | |
1728 | if (vport->isExternal || | |
1729 | OvsIsTunnelVportType(vport->ovsType)) { | |
1730 | isRecv = TRUE; | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | queueAttr = NlAttrFindNested(attr, OVS_USERSPACE_ATTR_PID); | |
1735 | userdataAttr = NlAttrFindNested(attr, OVS_USERSPACE_ATTR_USERDATA); | |
1736 | ||
1737 | elem = OvsCreateQueueNlPacket(NlAttrData(userdataAttr), | |
1738 | NlAttrGetSize(userdataAttr), | |
1739 | OVS_PACKET_CMD_ACTION, | |
1740 | vport, key, ovsFwdCtx->curNbl, | |
1741 | NET_BUFFER_LIST_FIRST_NB(ovsFwdCtx->curNbl), | |
1742 | isRecv, | |
1743 | layers); | |
1744 | if (elem) { | |
1745 | LIST_ENTRY missedPackets; | |
1746 | InitializeListHead(&missedPackets); | |
1747 | InsertTailList(&missedPackets, &elem->link); | |
1748 | OvsQueuePackets(&missedPackets, 1); | |
1749 | } else { | |
1750 | status = NDIS_STATUS_FAILURE; | |
1751 | } | |
1752 | ||
1753 | return status; | |
1754 | } | |
1755 | ||
1756 | /* | |
1757 | * -------------------------------------------------------------------------- | |
1758 | * OvsExecuteSampleAction -- | |
1759 | * Executes actions based on probability, as specified in the nested | |
1760 | * %OVS_SAMPLE_ATTR_* attributes. | |
1761 | * -------------------------------------------------------------------------- | |
1762 | */ | |
1763 | static __inline NDIS_STATUS | |
1764 | OvsExecuteSampleAction(OvsForwardingContext *ovsFwdCtx, | |
1765 | OvsFlowKey *key, | |
1766 | const PNL_ATTR attr) | |
1767 | { | |
1768 | PNET_BUFFER_LIST newNbl = NULL; | |
1769 | PNL_ATTR actionsList = NULL; | |
1770 | PNL_ATTR a = NULL; | |
1771 | INT rem = 0; | |
1772 | ||
1773 | SRand(); | |
1774 | NL_ATTR_FOR_EACH_UNSAFE(a, rem, NlAttrData(attr), NlAttrGetSize(attr)) { | |
1775 | switch (NlAttrType(a)) { | |
1776 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
1777 | { | |
1778 | UINT32 probability = NlAttrGetU32(a); | |
1779 | ||
1780 | if (!probability || Rand() > probability) { | |
1781 | return 0; | |
1782 | } | |
1783 | break; | |
1784 | } | |
1785 | case OVS_SAMPLE_ATTR_ACTIONS: | |
1786 | actionsList = a; | |
1787 | break; | |
1788 | } | |
1789 | } | |
1790 | ||
1791 | if (actionsList) { | |
1792 | rem = NlAttrGetSize(actionsList); | |
1793 | a = (PNL_ATTR)NlAttrData(actionsList); | |
1794 | } | |
1795 | ||
1796 | if (!rem) { | |
1797 | /* Actions list is empty, do nothing */ | |
1798 | return STATUS_SUCCESS; | |
1799 | } | |
1800 | ||
1801 | /* | |
1802 | * The only known usage of sample action is having a single user-space | |
1803 | * action. Treat this usage as a special case. | |
1804 | */ | |
1805 | if (NlAttrType(a) == OVS_ACTION_ATTR_USERSPACE && | |
1806 | NlAttrIsLast(a, rem)) { | |
1807 | return OvsOutputUserspaceAction(ovsFwdCtx, key, a); | |
1808 | } | |
1809 | ||
1810 | newNbl = OvsPartialCopyNBL(ovsFwdCtx->switchContext, ovsFwdCtx->curNbl, | |
1811 | 0, 0, TRUE /*copy NBL info*/); | |
1812 | if (newNbl == NULL) { | |
1813 | /* | |
1814 | * Skip the sample action when out of memory, but continue on with the | |
1815 | * rest of the action list. | |
1816 | */ | |
1817 | ovsActionStats.noCopiedNbl++; | |
1818 | return STATUS_SUCCESS; | |
1819 | } | |
1820 | ||
1821 | if (!OvsAddDeferredActions(newNbl, key, a)) { | |
1822 | OVS_LOG_INFO( | |
1823 | "Deferred actions limit reached, dropping sample action."); | |
1824 | OvsCompleteNBL(ovsFwdCtx->switchContext, newNbl, TRUE); | |
1825 | } | |
1826 | ||
1827 | return STATUS_SUCCESS; | |
1828 | } | |
1829 | ||
ee25964a SV |
1830 | /* |
1831 | * -------------------------------------------------------------------------- | |
1832 | * OvsDoExecuteActions -- | |
1833 | * Interpret and execute the specified 'actions' on the specified packet | |
c803536e SS |
1834 | * 'curNbl'. The expectation is that if the packet needs to be dropped |
1835 | * (completed) for some reason, it is added to 'completionList' so that the | |
1836 | * caller can complete the packet. If 'completionList' is NULL, the NBL is | |
1837 | * assumed to be generated by OVS and freed up. Otherwise, the function | |
1838 | * consumes the NBL by generating a NDIS send indication for the packet. | |
1839 | * | |
1840 | * There are one or more of "clone" NBLs that may get generated while | |
1841 | * executing the actions. Upon any failures, the "cloned" NBLs are freed up, | |
1842 | * and the caller does not have to worry about them. | |
1843 | * | |
1844 | * Success or failure is returned based on whether the specified actions | |
1845 | * were executed successfully on the packet or not. | |
1846 | * -------------------------------------------------------------------------- | |
1847 | */ | |
1848 | NDIS_STATUS | |
ee25964a SV |
1849 | OvsDoExecuteActions(POVS_SWITCH_CONTEXT switchContext, |
1850 | OvsCompletionList *completionList, | |
1851 | PNET_BUFFER_LIST curNbl, | |
1852 | UINT32 portNo, | |
1853 | ULONG sendFlags, | |
1854 | OvsFlowKey *key, | |
1855 | UINT64 *hash, | |
1856 | OVS_PACKET_HDR_INFO *layers, | |
1857 | const PNL_ATTR actions, | |
1858 | INT actionsLen) | |
c803536e | 1859 | { |
d838e577 | 1860 | PNL_ATTR a; |
c803536e SS |
1861 | INT rem; |
1862 | UINT32 dstPortID; | |
1863 | OvsForwardingContext ovsFwdCtx; | |
1864 | PCWSTR dropReason = L""; | |
1865 | NDIS_STATUS status; | |
1866 | PNDIS_SWITCH_FORWARDING_DETAIL_NET_BUFFER_LIST_INFO fwdDetail = | |
1867 | NET_BUFFER_LIST_SWITCH_FORWARDING_DETAIL(curNbl); | |
1868 | ||
1869 | /* XXX: ASSERT that the flow table lock is held. */ | |
1870 | status = OvsInitForwardingCtx(&ovsFwdCtx, switchContext, curNbl, portNo, | |
1871 | sendFlags, fwdDetail, completionList, | |
1872 | layers, TRUE); | |
1873 | if (status != NDIS_STATUS_SUCCESS) { | |
1874 | dropReason = L"OVS-initing destination port list failed"; | |
1875 | goto dropit; | |
1876 | } | |
1877 | ||
1878 | if (actionsLen == 0) { | |
1879 | dropReason = L"OVS-Dropped due to Flow action"; | |
1880 | ovsActionStats.zeroActionLen++; | |
1881 | goto dropit; | |
1882 | } | |
1883 | ||
1884 | NL_ATTR_FOR_EACH_UNSAFE (a, rem, actions, actionsLen) { | |
d838e577 | 1885 | switch(NlAttrType(a)) { |
c803536e | 1886 | case OVS_ACTION_ATTR_OUTPUT: |
d838e577 | 1887 | dstPortID = NlAttrGetU32(a); |
c803536e SS |
1888 | status = OvsAddPorts(&ovsFwdCtx, key, dstPortID, |
1889 | TRUE, TRUE); | |
1890 | if (status != NDIS_STATUS_SUCCESS) { | |
1891 | dropReason = L"OVS-adding destination port failed"; | |
1892 | goto dropit; | |
1893 | } | |
1894 | break; | |
1895 | ||
1896 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
1897 | { | |
1898 | struct ovs_action_push_vlan *vlan; | |
1899 | PVOID vlanTagValue; | |
1900 | PNDIS_NET_BUFFER_LIST_8021Q_INFO vlanTag; | |
1901 | ||
1902 | if (ovsFwdCtx.destPortsSizeOut > 0 || ovsFwdCtx.tunnelTxNic != NULL | |
1903 | || ovsFwdCtx.tunnelRxNic != NULL) { | |
1904 | status = OvsOutputBeforeSetAction(&ovsFwdCtx); | |
1905 | if (status != NDIS_STATUS_SUCCESS) { | |
1906 | dropReason = L"OVS-adding destination failed"; | |
1907 | goto dropit; | |
1908 | } | |
1909 | } | |
1910 | ||
1911 | vlanTagValue = NET_BUFFER_LIST_INFO(ovsFwdCtx.curNbl, | |
1912 | Ieee8021QNetBufferListInfo); | |
1913 | if (vlanTagValue != NULL) { | |
1914 | /* | |
1915 | * XXX: We don't support double VLAN tag offload. In such cases, | |
1916 | * we need to insert the existing one into the packet buffer, | |
1917 | * and add the new one as offload. This will take care of | |
1918 | * guest tag-in-tag case as well as OVS rules that specify | |
1919 | * tag-in-tag. | |
1920 | */ | |
1921 | } else { | |
1922 | vlanTagValue = 0; | |
1923 | vlanTag = (PNDIS_NET_BUFFER_LIST_8021Q_INFO)(PVOID *)&vlanTagValue; | |
d838e577 | 1924 | vlan = (struct ovs_action_push_vlan *)NlAttrGet((const PNL_ATTR)a); |
c803536e SS |
1925 | vlanTag->TagHeader.VlanId = ntohs(vlan->vlan_tci) & 0xfff; |
1926 | vlanTag->TagHeader.UserPriority = ntohs(vlan->vlan_tci) >> 13; | |
1927 | ||
1928 | NET_BUFFER_LIST_INFO(ovsFwdCtx.curNbl, | |
1929 | Ieee8021QNetBufferListInfo) = vlanTagValue; | |
1930 | } | |
1931 | break; | |
1932 | } | |
1933 | ||
1934 | case OVS_ACTION_ATTR_POP_VLAN: | |
1935 | { | |
1936 | if (ovsFwdCtx.destPortsSizeOut > 0 || ovsFwdCtx.tunnelTxNic != NULL | |
1937 | || ovsFwdCtx.tunnelRxNic != NULL) { | |
1938 | status = OvsOutputBeforeSetAction(&ovsFwdCtx); | |
1939 | if (status != NDIS_STATUS_SUCCESS) { | |
1940 | dropReason = L"OVS-adding destination failed"; | |
1941 | goto dropit; | |
1942 | } | |
1943 | } | |
1944 | ||
1945 | if (NET_BUFFER_LIST_INFO(ovsFwdCtx.curNbl, | |
1946 | Ieee8021QNetBufferListInfo) != 0) { | |
1947 | NET_BUFFER_LIST_INFO(ovsFwdCtx.curNbl, | |
1948 | Ieee8021QNetBufferListInfo) = 0; | |
1949 | } else { | |
1950 | /* | |
1951 | * The VLAN tag is inserted into the packet buffer. Pop the tag | |
1952 | * by packet buffer modification. | |
1953 | */ | |
1954 | status = OvsPopVlanInPktBuf(&ovsFwdCtx); | |
1955 | if (status != NDIS_STATUS_SUCCESS) { | |
1956 | dropReason = L"OVS-pop vlan action failed"; | |
1957 | goto dropit; | |
1958 | } | |
1959 | } | |
1960 | break; | |
1961 | } | |
1962 | ||
5874d571 SV |
1963 | case OVS_ACTION_ATTR_PUSH_MPLS: |
1964 | { | |
1965 | if (ovsFwdCtx.destPortsSizeOut > 0 || ovsFwdCtx.tunnelTxNic != NULL | |
1966 | || ovsFwdCtx.tunnelRxNic != NULL) { | |
1967 | status = OvsOutputBeforeSetAction(&ovsFwdCtx); | |
1968 | if (status != NDIS_STATUS_SUCCESS) { | |
1969 | dropReason = L"OVS-adding destination failed"; | |
1970 | goto dropit; | |
1971 | } | |
1972 | } | |
1973 | ||
1974 | status = OvsActionMplsPush(&ovsFwdCtx, | |
1975 | (struct ovs_action_push_mpls *)NlAttrGet | |
1976 | ((const PNL_ATTR)a)); | |
1977 | if (status != NDIS_STATUS_SUCCESS) { | |
1978 | dropReason = L"OVS-push MPLS action failed"; | |
1979 | goto dropit; | |
1980 | } | |
1981 | layers->l3Offset += MPLS_HLEN; | |
1982 | layers->l4Offset += MPLS_HLEN; | |
1983 | break; | |
1984 | } | |
1985 | ||
1986 | case OVS_ACTION_ATTR_POP_MPLS: | |
1987 | { | |
1988 | if (ovsFwdCtx.destPortsSizeOut > 0 || ovsFwdCtx.tunnelTxNic != NULL | |
1989 | || ovsFwdCtx.tunnelRxNic != NULL) { | |
1990 | status = OvsOutputBeforeSetAction(&ovsFwdCtx); | |
1991 | if (status != NDIS_STATUS_SUCCESS) { | |
1992 | dropReason = L"OVS-adding destination failed"; | |
1993 | goto dropit; | |
1994 | } | |
1995 | } | |
1996 | ||
1997 | status = OvsActionMplsPop(&ovsFwdCtx, NlAttrGetBe16(a)); | |
1998 | if (status != NDIS_STATUS_SUCCESS) { | |
1999 | dropReason = L"OVS-pop MPLS action failed"; | |
2000 | goto dropit; | |
2001 | } | |
2002 | layers->l3Offset -= MPLS_HLEN; | |
2003 | layers->l4Offset -= MPLS_HLEN; | |
2004 | break; | |
2005 | } | |
2006 | ||
245eedef SV |
2007 | case OVS_ACTION_ATTR_HASH: |
2008 | { | |
2009 | if (ovsFwdCtx.destPortsSizeOut > 0 || ovsFwdCtx.tunnelTxNic != NULL | |
2010 | || ovsFwdCtx.tunnelRxNic != NULL) { | |
2011 | status = OvsOutputBeforeSetAction(&ovsFwdCtx); | |
2012 | if (status != NDIS_STATUS_SUCCESS) { | |
2013 | dropReason = L"OVS-adding destination failed"; | |
2014 | goto dropit; | |
2015 | } | |
2016 | } | |
2017 | ||
2018 | OvsExecuteHash(key, (const PNL_ATTR)a); | |
2019 | ||
2020 | break; | |
2021 | } | |
2022 | ||
792d377d SV |
2023 | case OVS_ACTION_ATTR_CT: |
2024 | { | |
2025 | if (ovsFwdCtx.destPortsSizeOut > 0 | |
2026 | || ovsFwdCtx.tunnelTxNic != NULL | |
2027 | || ovsFwdCtx.tunnelRxNic != NULL) { | |
2028 | status = OvsOutputBeforeSetAction(&ovsFwdCtx); | |
2029 | if (status != NDIS_STATUS_SUCCESS) { | |
2030 | dropReason = L"OVS-adding destination failed"; | |
2031 | goto dropit; | |
2032 | } | |
2033 | } | |
2034 | ||
2035 | status = OvsExecuteConntrackAction(ovsFwdCtx.curNbl, layers, | |
2036 | key, (const PNL_ATTR)a); | |
2037 | if (status != NDIS_STATUS_SUCCESS) { | |
2038 | OVS_LOG_ERROR("CT Action failed"); | |
2039 | dropReason = L"OVS-conntrack action failed"; | |
2040 | goto dropit; | |
2041 | } | |
2042 | break; | |
2043 | } | |
2044 | ||
ee25964a SV |
2045 | case OVS_ACTION_ATTR_RECIRC: |
2046 | { | |
2047 | if (ovsFwdCtx.destPortsSizeOut > 0 || ovsFwdCtx.tunnelTxNic != NULL | |
2048 | || ovsFwdCtx.tunnelRxNic != NULL) { | |
2049 | status = OvsOutputBeforeSetAction(&ovsFwdCtx); | |
2050 | if (status != NDIS_STATUS_SUCCESS) { | |
2051 | dropReason = L"OVS-adding destination failed"; | |
2052 | goto dropit; | |
2053 | } | |
2054 | } | |
2055 | ||
2056 | status = OvsExecuteRecirc(&ovsFwdCtx, key, (const PNL_ATTR)a, rem); | |
2057 | if (status != NDIS_STATUS_SUCCESS) { | |
2058 | dropReason = L"OVS-recirculation action failed"; | |
2059 | goto dropit; | |
2060 | } | |
2061 | ||
2062 | if (NlAttrIsLast(a, rem)) { | |
2063 | goto exit; | |
2064 | } | |
2065 | break; | |
2066 | } | |
2067 | ||
c803536e SS |
2068 | case OVS_ACTION_ATTR_USERSPACE: |
2069 | { | |
9d36ca82 SV |
2070 | status = OvsOutputUserspaceAction(&ovsFwdCtx, key, |
2071 | (const PNL_ATTR)a); | |
2072 | if (status != NDIS_STATUS_SUCCESS) { | |
c803536e SS |
2073 | dropReason = L"OVS-Dropped due to failure to queue to " |
2074 | L"userspace"; | |
2075 | goto dropit; | |
2076 | } | |
9d36ca82 SV |
2077 | dropReason = L"OVS-Completed since packet was copied to " |
2078 | L"userspace"; | |
c803536e SS |
2079 | break; |
2080 | } | |
2081 | case OVS_ACTION_ATTR_SET: | |
2082 | { | |
2083 | if (ovsFwdCtx.destPortsSizeOut > 0 || ovsFwdCtx.tunnelTxNic != NULL | |
2084 | || ovsFwdCtx.tunnelRxNic != NULL) { | |
2085 | status = OvsOutputBeforeSetAction(&ovsFwdCtx); | |
2086 | if (status != NDIS_STATUS_SUCCESS) { | |
2087 | dropReason = L"OVS-adding destination failed"; | |
2088 | goto dropit; | |
2089 | } | |
2090 | } | |
2091 | ||
2092 | status = OvsExecuteSetAction(&ovsFwdCtx, key, hash, | |
d838e577 AS |
2093 | (const PNL_ATTR)NlAttrGet |
2094 | ((const PNL_ATTR)a)); | |
c803536e SS |
2095 | if (status != NDIS_STATUS_SUCCESS) { |
2096 | dropReason = L"OVS-set action failed"; | |
2097 | goto dropit; | |
2098 | } | |
2099 | break; | |
2100 | } | |
2101 | case OVS_ACTION_ATTR_SAMPLE: | |
9d36ca82 SV |
2102 | { |
2103 | if (ovsFwdCtx.destPortsSizeOut > 0 || ovsFwdCtx.tunnelTxNic != NULL | |
2104 | || ovsFwdCtx.tunnelRxNic != NULL) { | |
2105 | status = OvsOutputBeforeSetAction(&ovsFwdCtx); | |
2106 | if (status != NDIS_STATUS_SUCCESS) { | |
2107 | dropReason = L"OVS-adding destination failed"; | |
2108 | goto dropit; | |
2109 | } | |
2110 | } | |
2111 | ||
2112 | status = OvsExecuteSampleAction(&ovsFwdCtx, key, | |
2113 | (const PNL_ATTR)a); | |
2114 | if (status != NDIS_STATUS_SUCCESS) { | |
2115 | dropReason = L"OVS-sample action failed"; | |
2116 | goto dropit; | |
2117 | } | |
2118 | break; | |
2119 | } | |
c803536e | 2120 | default: |
7c5d9f17 | 2121 | status = NDIS_STATUS_NOT_SUPPORTED; |
c803536e SS |
2122 | break; |
2123 | } | |
2124 | } | |
2125 | ||
2126 | if (ovsFwdCtx.destPortsSizeOut > 0 || ovsFwdCtx.tunnelTxNic != NULL | |
2127 | || ovsFwdCtx.tunnelRxNic != NULL) { | |
2128 | status = OvsOutputForwardingCtx(&ovsFwdCtx); | |
2129 | ASSERT(ovsFwdCtx.curNbl == NULL); | |
2130 | } | |
2131 | ||
2132 | ASSERT(ovsFwdCtx.destPortsSizeOut == 0); | |
2133 | ASSERT(ovsFwdCtx.tunnelRxNic == NULL); | |
2134 | ASSERT(ovsFwdCtx.tunnelTxNic == NULL); | |
2135 | ||
2136 | dropit: | |
2137 | /* | |
2138 | * If curNbl != NULL, it implies the NBL has not been not freed up so far. | |
2139 | */ | |
2140 | if (ovsFwdCtx.curNbl) { | |
2141 | OvsCompleteNBLForwardingCtx(&ovsFwdCtx, dropReason); | |
2142 | } | |
2143 | ||
ee25964a SV |
2144 | exit: |
2145 | return status; | |
2146 | } | |
2147 | ||
2148 | /* | |
2149 | * -------------------------------------------------------------------------- | |
2150 | * OvsActionsExecute -- | |
2151 | * The function interprets and executes the specified 'actions' on the | |
2152 | * specified packet 'curNbl'. See 'OvsDoExecuteActions' description for | |
2153 | * more details. | |
2154 | * | |
2155 | * Also executes deferred actions added by recirculation or sample | |
2156 | * actions. | |
2157 | * -------------------------------------------------------------------------- | |
2158 | */ | |
2159 | NDIS_STATUS | |
2160 | OvsActionsExecute(POVS_SWITCH_CONTEXT switchContext, | |
2161 | OvsCompletionList *completionList, | |
2162 | PNET_BUFFER_LIST curNbl, | |
2163 | UINT32 portNo, | |
2164 | ULONG sendFlags, | |
2165 | OvsFlowKey *key, | |
2166 | UINT64 *hash, | |
2167 | OVS_PACKET_HDR_INFO *layers, | |
2168 | const PNL_ATTR actions, | |
2169 | INT actionsLen) | |
2170 | { | |
5278f698 | 2171 | NDIS_STATUS status; |
ee25964a SV |
2172 | |
2173 | status = OvsDoExecuteActions(switchContext, completionList, curNbl, | |
2174 | portNo, sendFlags, key, hash, layers, | |
2175 | actions, actionsLen); | |
2176 | ||
2177 | if (status == STATUS_SUCCESS) { | |
2178 | status = OvsProcessDeferredActions(switchContext, completionList, | |
2179 | portNo, sendFlags, layers); | |
2180 | } | |
2181 | ||
2182 | return status; | |
2183 | } | |
2184 | ||
2185 | /* | |
2186 | * -------------------------------------------------------------------------- | |
2187 | * OvsDoRecirc -- | |
2188 | * The function processes the packet 'curNbl' that re-entered datapath | |
2189 | * packet processing after a recirculation action. | |
2190 | * -------------------------------------------------------------------------- | |
2191 | */ | |
2192 | NDIS_STATUS | |
2193 | OvsDoRecirc(POVS_SWITCH_CONTEXT switchContext, | |
2194 | OvsCompletionList *completionList, | |
2195 | PNET_BUFFER_LIST curNbl, | |
2196 | OvsFlowKey *key, | |
2197 | UINT32 srcPortNo, | |
2198 | OVS_PACKET_HDR_INFO *layers) | |
2199 | { | |
5278f698 PB |
2200 | NDIS_STATUS status; |
2201 | OvsFlow *flow; | |
ee25964a SV |
2202 | OvsForwardingContext ovsFwdCtx = { 0 }; |
2203 | UINT64 hash = 0; | |
2204 | ASSERT(layers); | |
2205 | ||
2206 | OvsInitForwardingCtx(&ovsFwdCtx, switchContext, curNbl, | |
2207 | srcPortNo, 0, | |
2208 | NET_BUFFER_LIST_SWITCH_FORWARDING_DETAIL(curNbl), | |
2209 | completionList, layers, TRUE); | |
2210 | ||
ee25964a SV |
2211 | flow = OvsLookupFlow(&ovsFwdCtx.switchContext->datapath, key, &hash, FALSE); |
2212 | if (flow) { | |
2213 | UINT32 level = OvsDeferredActionsLevelGet(); | |
2214 | ||
2215 | if (level > DEFERRED_ACTION_EXEC_LEVEL) { | |
2216 | OvsCompleteNBLForwardingCtx(&ovsFwdCtx, | |
2217 | L"OVS-Dropped due to deferred actions execution level limit \ | |
2218 | reached"); | |
2219 | ovsActionStats.deferredActionsExecLimit++; | |
2220 | ovsFwdCtx.curNbl = NULL; | |
2221 | return NDIS_STATUS_FAILURE; | |
2222 | } | |
2223 | ||
2224 | OvsFlowUsed(flow, ovsFwdCtx.curNbl, &ovsFwdCtx.layers); | |
2225 | ovsFwdCtx.switchContext->datapath.hits++; | |
2226 | ||
2227 | OvsDeferredActionsLevelInc(); | |
2228 | ||
2229 | status = OvsDoExecuteActions(ovsFwdCtx.switchContext, | |
2230 | ovsFwdCtx.completionList, | |
2231 | ovsFwdCtx.curNbl, | |
2232 | ovsFwdCtx.srcVportNo, | |
2233 | ovsFwdCtx.sendFlags, | |
2234 | key, &hash, &ovsFwdCtx.layers, | |
2235 | flow->actions, flow->actionsLen); | |
2236 | ovsFwdCtx.curNbl = NULL; | |
2237 | ||
2238 | OvsDeferredActionsLevelDec(); | |
2239 | } else { | |
2240 | POVS_VPORT_ENTRY vport = NULL; | |
2241 | LIST_ENTRY missedPackets; | |
2242 | UINT32 num = 0; | |
2243 | ||
2244 | ovsFwdCtx.switchContext->datapath.misses++; | |
2245 | InitializeListHead(&missedPackets); | |
2246 | vport = OvsFindVportByPortNo(switchContext, srcPortNo); | |
2247 | if (vport == NULL || vport->ovsState != OVS_STATE_CONNECTED) { | |
2248 | OvsCompleteNBLForwardingCtx(&ovsFwdCtx, | |
2249 | L"OVS-Dropped due to port removal"); | |
2250 | ovsActionStats.noVport++; | |
2251 | return NDIS_STATUS_SUCCESS; | |
2252 | } | |
2253 | status = OvsCreateAndAddPackets(NULL, 0, OVS_PACKET_CMD_MISS, | |
2254 | vport, key, ovsFwdCtx.curNbl, | |
e97d67f4 | 2255 | vport->portId == |
ee25964a SV |
2256 | switchContext->virtualExternalPortId, |
2257 | &ovsFwdCtx.layers, | |
2258 | ovsFwdCtx.switchContext, | |
2259 | &missedPackets, &num); | |
2260 | if (num) { | |
2261 | OvsQueuePackets(&missedPackets, num); | |
2262 | } | |
2263 | if (status == NDIS_STATUS_SUCCESS) { | |
2264 | /* Complete the packet since it was copied to user buffer. */ | |
2265 | OvsCompleteNBLForwardingCtx(&ovsFwdCtx, | |
2266 | L"OVS-Dropped since packet was copied to userspace"); | |
2267 | ovsActionStats.flowMiss++; | |
2268 | } else { | |
2269 | OvsCompleteNBLForwardingCtx(&ovsFwdCtx, | |
2270 | L"OVS-Dropped due to failure to queue to userspace"); | |
2271 | ovsActionStats.failedFlowMiss++; | |
2272 | status = NDIS_STATUS_FAILURE; | |
2273 | } | |
2274 | } | |
2275 | ||
c803536e SS |
2276 | return status; |
2277 | } |