1 /* 2 * Copyright (c) 2016-2022 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29 #ifndef _SKYWALK_OS_PACKET_H_ 30 #define _SKYWALK_OS_PACKET_H_ 31 32 #ifdef PRIVATE 33 34 #include <stdint.h> 35 #include <sys/types.h> 36 #include <sys/cdefs.h> 37 #include <uuid/uuid.h> 38 #include <mach/boolean.h> 39 #include <mach/vm_types.h> 40 #include <skywalk/os_nexus.h> 41 42 /* 43 * @enum packet_svc_class_t 44 * @abstract Service class of a packet 45 * @discussion Property that represents the category of service 46 * of a packet. This information may be used by the driver 47 * and at the link level. 48 * @constant PKT_SC_BK_SYS "Background System-Initiated", high delay 49 * tolerant, high loss tolerant, elastic flow, variable size & 50 * long-lived. 51 * @constant PKT_SC_BK "Background", user-initiated, high delay tolerant, 52 * high loss tolerant, elastic flow, variable size. This level 53 * corresponds to WMM access class "BG". 54 * @constant PKT_SC_BE "Best Effort", unclassified/standard. This is 55 * the default service class; pretty much a mix of everything. 56 * This level corresponds to WMM access class "BE". 57 * @constant PKT_SC_RD 58 * "Responsive Data", a notch higher than "Best Effort", medium 59 * delay tolerant, medium loss tolerant, elastic flow, bursty, 60 * long-lived. 61 * @constant PKT_SC_OAM "Operations, Administration, and Management", 62 * medium delay tolerant, low-medium loss tolerant, elastic & 63 * inelastic flows, variable size. 64 * @constant PKT_SC_AV "Multimedia Audio/Video Streaming", medium delay 65 * tolerant, low-medium loss tolerant, elastic flow, constant 66 * packet interval, variable rate & size. 67 * @constant PKT_SC_RV "Responsive Multimedia Audio/Video", low delay 68 * tolerant, low-medium loss tolerant, elastic flow, variable 69 * packet interval, rate and size. 70 * @constant PKT_SC_VI "Interactive Video", low delay tolerant, low- 71 * medium loss tolerant, elastic flow, constant packet interval, 72 * variable rate & size. This level corresponds to WMM access 73 * class "VI". 74 * @constant PKT_SC_SIG "Signaling", low delay tolerant, low loss 75 * tolerant, inelastic flow, jitter tolerant, rate is bursty but 76 * short, variable size. e.g. SIP. This level corresponds to WMM 77 * access class "VI". 78 * @constant PKT_SC_VO "Interactive Voice", low delay tolerant, low loss 79 * tolerant, inelastic flow, constant packet rate, somewhat fixed 80 * size. This level corresponds to WMM access class "VO" or 81 * PKT_TC_VO. 82 * @constant PKT_SC_CTL "Network Control", low delay tolerant, low loss 83 * tolerant, inelastic flow, rate is short & burst, variable size. 84 */ 85 typedef enum { 86 PKT_SC_BK_SYS = 0x00080090, /* lowest class */ 87 PKT_SC_BK = 0x00100080, 88 89 PKT_SC_BE = 0x00000000, 90 PKT_SC_RD = 0x00180010, 91 PKT_SC_OAM = 0x00200020, 92 93 PKT_SC_AV = 0x00280120, 94 PKT_SC_RV = 0x00300110, 95 PKT_SC_VI = 0x00380100, 96 PKT_SC_SIG = 0x00380130, 97 98 PKT_SC_VO = 0x00400180, 99 PKT_SC_CTL = 0x00480190, /* highest class */ 100 } packet_svc_class_t; 101 102 /* CSTYLED */ 103 /*! 104 * @enum packet_traffic_class_t 105 * @abstract Traffic class of a packet 106 * @discussion Property that represent the category of traffic of a packet. 107 * This information may be used by the driver and at the link level. 108 * @constant PKT_TC_BE Best effort, normal class. 109 * @constant PKT_TC_BK Background, low priority or bulk traffic. 110 * @constant PKT_TC_VI Interactive video, constant bit rate, low latency. 111 * @constant PKT_TC_VO Interactive voice, constant bit rate, lowest latency. 112 */ 113 typedef enum { 114 PKT_TC_BE = 0, 115 PKT_TC_BK = 1, 116 PKT_TC_VI = 2, 117 PKT_TC_VO = 3, 118 } packet_traffic_class_t; 119 120 /* 121 * These conversion macros rely on the corresponding PKT_SC and 122 * PKT_TC values in order to establish the following mapping: 123 * 124 * PKT_SC_BK_SYS ] ==> PKT_TC_BK 125 * PKT_SC_BK ] 126 * 127 * PKT_SC_BE ] ==> PKT_TC_BE 128 * PKT_SC_RD ] 129 * PKT_SC_OAM ] 130 * 131 * PKT_SC_AV ] ==> PKT_TC_VI 132 * PKT_SC_RV ] 133 * PKT_SC_VI ] 134 * PKT_SC_SIG ] 135 * 136 * PKT_SC_VO ] ==> PKT_TC_VO 137 * PKT_SC_CTL ] 138 * 139 * The values assigned to each service class allows for a fast mapping to 140 * the corresponding PKT_TC traffic class values, as well as to retrieve the 141 * assigned index; therefore care must be taken when comparing against these 142 * values. Use the corresponding class and index macros to retrieve the 143 * corresponding portion, and never assume that a higher class corresponds 144 * to a higher index. 145 */ 146 #define PKT_SCVAL(x) ((x) & 0xffff) 147 #define PKT_SC2TC(_sc) (PKT_SCVAL(_sc) >> 7) 148 #define PKT_TC2SCVAL(_tc) ((_tc) << 7) 149 150 #define PKT_SCVAL_BK_SYS PKT_SCVAL(PKT_SC_BK_SYS) 151 #define PKT_SCVAL_BK PKT_SCVAL(PKT_SC_BK) 152 #define PKT_SCVAL_BE PKT_SCVAL(PKT_SC_BE) 153 #define PKT_SCVAL_RD PKT_SCVAL(PKT_SC_RD) 154 #define PKT_SCVAL_OAM PKT_SCVAL(PKT_SC_OAM) 155 #define PKT_SCVAL_AV PKT_SCVAL(PKT_SC_AV) 156 #define PKT_SCVAL_RV PKT_SCVAL(PKT_SC_RV) 157 #define PKT_SCVAL_VI PKT_SCVAL(PKT_SC_VI) 158 #define PKT_SCVAL_SIG PKT_SCVAL(PKT_SC_SIG) 159 #define PKT_SCVAL_VO PKT_SCVAL(PKT_SC_VO) 160 #define PKT_SCVAL_CTL PKT_SCVAL(PKT_SC_CTL) 161 162 /* 163 * Packet checksum offload flags. 164 */ 165 typedef uint32_t packet_csum_flags_t; 166 typedef uint32_t packet_trace_id_t; 167 typedef uint32_t packet_flowid_t; 168 typedef uint16_t packet_trace_tag_t; 169 170 /* 171 * PACKET_CSUM_PARTIAL indicates the following: 172 * 173 * On transmit, the start and stuff offsets are significant, and that the 174 * module setting this information is requesting that the layer below it 175 * compute 16-bit 1's complement sum from the location marked by the start 176 * offset to the end of the packet, and store the resulted sum at the 177 * location marked by the stuff offset. If PACKET_CSUM_ZERO_INVERT is set, 178 * and if the resulted sum is 0, it will be converted to -0 (0xffff). 179 * 180 * On receive, the start offset and checksum value are significant, and 181 * that the module computing the 16-bit 1's complement and setting this 182 * information is requesting that the layer above it perform any necessary 183 * adjustments to exclude/include data span that's not applicable, as well 184 * as to validate the checksum value. 185 */ 186 #define PACKET_CSUM_PARTIAL 0x01 /* partial one's complement */ 187 #define PACKET_CSUM_ZERO_INVERT 0x02 /* invert resulted 0 to 0xffff */ 188 189 #define PACKET_CSUM_IP 0x0004 190 #define PACKET_CSUM_TCP 0x0008 191 #define PACKET_CSUM_UDP 0x0010 192 #define PACKET_CSUM_TCPIPV6 0x0020 193 #define PACKET_CSUM_UDPIPV6 0x0040 194 195 /* 196 * Below flags are for RX. 197 */ 198 #define PACKET_CSUM_IP_CHECKED 0x0100 /* did IP checksum */ 199 #define PACKET_CSUM_IP_VALID 0x0200 /* and the IP checksum is valid */ 200 #define PACKET_CSUM_DATA_VALID 0x0400 /* csum_rx_val is valid */ 201 #define PACKET_CSUM_PSEUDO_HDR 0x0800 /* csum_rx_val includes pseudo hdr */ 202 203 typedef enum : uint32_t { 204 PACKET_TSO_IPV4 = 0x00100000, 205 PACKET_TSO_IPV6 = 0x00200000, 206 } packet_tso_flags_t; 207 208 #define PACKET_CSUM_TSO_IPV4 0x00100000 209 #define PACKET_CSUM_TSO_IPV6 0x00200000 210 211 #define PACKET_HAS_VALID_IP_CSUM(_p) \ 212 (((_p)->pkt_csum_flags & (PACKET_CSUM_IP_CHECKED | PACKET_CSUM_IP_VALID)) \ 213 == (PACKET_CSUM_IP_CHECKED | PACKET_CSUM_IP_VALID)) 214 215 #define PACKET_HAS_PARTIAL_CHECKSUM(_p) \ 216 ((_p)->pkt_csum_flags & (PACKET_CSUM_PARTIAL)) 217 218 #define PACKET_CSUM_RX_FULL_FLAGS \ 219 (PACKET_CSUM_IP_CHECKED | PACKET_CSUM_IP_VALID | \ 220 PACKET_CSUM_DATA_VALID | PACKET_CSUM_PSEUDO_HDR) 221 222 #define PACKET_CSUM_RX_FLAGS \ 223 (PACKET_CSUM_RX_FULL_FLAGS | PACKET_CSUM_PARTIAL) 224 225 #define PACKET_CSUM_TSO_FLAGS \ 226 (PACKET_CSUM_TSO_IPV4 | PACKET_CSUM_TSO_IPV6) 227 228 #define PACKET_HAS_FULL_CHECKSUM_FLAGS(_p) \ 229 (((_p)->pkt_csum_flags & PACKET_CSUM_RX_FULL_FLAGS) == PACKET_CSUM_RX_FULL_FLAGS) 230 231 #define PACKET_TX_CSUM_OFFLOAD_FLAGS \ 232 (PACKET_CSUM_IP | PACKET_CSUM_TCP | PACKET_CSUM_UDP | \ 233 PACKET_CSUM_TCPIPV6 | PACKET_CSUM_UDPIPV6 | PACKET_CSUM_ZERO_INVERT) 234 235 #define PACKET_CSUM_FLAGS \ 236 (PACKET_TX_CSUM_OFFLOAD_FLAGS | PACKET_CSUM_RX_FLAGS | PACKET_CSUM_TSO_FLAGS) 237 /* 238 * TODO: [email protected] -- these are temporary and should be removed later. 239 */ 240 #define OS_PACKET_HAS_CHECKSUM_API 1 241 #define OS_PACKET_HAS_SEGMENT_COUNT 1 242 #define OS_PACKET_HAS_TRACING_API 1 243 #define OS_PACKET_HAS_SEGMENT_SIZE 1 244 245 /* 246 * Valid values for pkt_aggr_type. 247 */ 248 #define PKT_AGGR_NONE 0x00 /* no aggregation */ 249 #define PKT_AGGR_IP_CHAIN 0x01 /* buflet chain of discrete IP packets containing contiguous L4 frames */ 250 #define PKT_AGGR_SINGLE_IP 0x02 /* buflet chain representing single IP packet */ 251 #define PKT_AGGR_SINGLE_IP_PACKED 0x03 /* buflet chain representing single IP packet in packed format */ 252 253 /* 254 * packet_id is a per packet metadata which can be set on a packet by the 255 * application. It can be used to identify either an individual or a group 256 * of packets within the networking stack and driver. 257 */ 258 typedef struct packet_id { 259 /* 260 * version of this structure. 261 */ 262 uint8_t pktid_version; 263 #define OS_PACKET_PKTID_VERSION_1 1 264 #define OS_PACKET_PKTID_VERSION_CURRENT OS_PACKET_PKTID_VERSION_1 265 /* 266 * payload type of the packet, opaque to the network stack. 267 */ 268 uint8_t pktid_payload_type; 269 /* 270 * packet sequence number, monotonically increasing. 271 */ 272 uint16_t pktid_sequence_number; 273 /* 274 * packet timestamp, monotonically increasing and opaque to the 275 * network stack. Sample rate of the timestamp clock is determined 276 * by the application. 277 */ 278 uint32_t pktid_timestamp; 279 /* 280 * Identifier for streams defined by the application. 281 */ 282 uint32_t pktid_stream_identifier; 283 /* 284 * reserved for future use. 285 */ 286 uint32_t _reserved; 287 } packet_id_t; 288 289 /* 290 * Packet Trace code 291 * Used with os_packet_trace_* functions. 292 * Total of 12bit (0xABC) code space available, current sub-code allocation is: 293 * 0x00C code space for FSW Rx path. 294 * 0x01C code space for FSW Tx path. 295 * 296 * More sub-code can be added for other packet data path, e.g. uPipe, BSD, etc. 297 * 298 * Note: 299 * 1. Needs to include <sys/kdebug.h> to use the values. 300 * 2. When making changes to sub-code/value, update static assertions in 301 * pp_init and probe list ariadne-plists/skywalk-tracepoints.plist. 302 * 303 */ 304 /* Rx Group */ 305 #define PKT_TRACE_RX_DRV_START (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x001) | DBG_FUNC_START) 306 #define PKT_TRACE_RX_DRV_END (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x001) | DBG_FUNC_END) 307 308 #define PKT_TRACE_RX_FSW_START (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x002) | DBG_FUNC_START) 309 #define PKT_TRACE_RX_FSW_END (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x002) | DBG_FUNC_END) 310 311 #define PKT_TRACE_RX_CHN_START (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x003) | DBG_FUNC_START) 312 #define PKT_TRACE_RX_CHN_END (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x003) | DBG_FUNC_END) 313 314 315 /* Tx Group */ 316 #define PKT_TRACE_TX_FSW_START (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x010) | DBG_FUNC_START) 317 #define PKT_TRACE_TX_FSW_END (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x010) | DBG_FUNC_END) 318 319 #define PKT_TRACE_TX_AQM_START (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x011) | DBG_FUNC_START) 320 #define PKT_TRACE_TX_AQM_END (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x011) | DBG_FUNC_END) 321 322 #define PKT_TRACE_TX_DRV_START (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x012) | DBG_FUNC_START) 323 #define PKT_TRACE_TX_DRV_END (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x012) | DBG_FUNC_END) 324 325 /* 326 * @enum packet_expiry_action_t 327 * @abstract The desired action(s) to take upon the expiration of the packet 328 * @discussion Bitfield property to express the desired actions to take when the packet expires. 329 * At the moment the actions are only taken for the TX packets. 330 * 331 * @constant PACKET_EXPIRY_ACTION_DROP - drop the packet 332 * @constant PACKET_EXPIRY_ACTION_NOTIFY - notify the upper layers 333 */ 334 typedef enum { 335 PACKET_EXPIRY_ACTION_NONE = 0x0, 336 PACKET_EXPIRY_ACTION_DROP = 0x1, 337 PACKET_EXPIRY_ACTION_NOTIFY = 0x2, 338 } packet_expiry_action_t; 339 340 /* 341 * @enum packet_app_metadata_type_t 342 * @abstract Application specific metadata which can be used by the Network 343 * Stack or Network Interface Driver/firmware. 344 * @discussion Supported Application types are: 345 * @constant PACKET_APP_METADATA_TYPE_VOICE - voice application 346 */ 347 typedef enum : uint8_t { 348 #if defined(LIBSYSCALL_INTERFACE) || defined(BSD_KERNEL_PRIVATE) 349 PACKET_APP_METADATA_TYPE_UNSPECIFIED = 0, 350 #endif /* LIBSYSCALL_INTERFACE || BSD_KERNEL_PRIVATE */ 351 PACKET_APP_METADATA_TYPE_VOICE = 1, 352 #if defined(LIBSYSCALL_INTERFACE) || defined(BSD_KERNEL_PRIVATE) 353 PACKET_APP_METADATA_TYPE_MIN = PACKET_APP_METADATA_TYPE_VOICE, 354 PACKET_APP_METADATA_TYPE_MAX = PACKET_APP_METADATA_TYPE_VOICE, 355 #endif /* LIBSYSCALL_INTERFACE || BSD_KERNEL_PRIVATE */ 356 } packet_app_metadata_type_t; 357 358 /* 359 * @enum packet_voice_app_metadata_t 360 * @abstract Voice application specific metadata. 361 * @discussion Supported Voice application metadata values are: 362 * @constant PACKET_VOICE_APP_METADATA_UNSPECIFIED - metadata not specified. 363 * @constant PACKET_VOICE_APP_METADATA_SPEECH - speech frame. 364 * @constant PACKET_VOICE_APP_METADATA_SILENCE - silence frame. 365 * @constant PACKET_VOICE_APP_METADATA_OTHER - RTCP XR, RTCP, or DTMF. 366 */ 367 typedef enum : uint8_t { 368 PACKET_VOICE_APP_METADATA_UNSPECIFIED = 0x0, 369 PACKET_VOICE_APP_METADATA_SPEECH = 0x1, 370 PACKET_VOICE_APP_METADATA_SILENCE = 0x2, 371 PACKET_VOICE_APP_METADATA_OTHER = 0x3, 372 } packet_voice_app_metadata_t; 373 374 #ifndef KERNEL 375 /* 376 * User APIs. 377 */ 378 379 /* 380 * Opaque handles. 381 */ 382 struct __user_buflet; 383 typedef uint64_t packet_t; 384 typedef struct __user_buflet *buflet_t; 385 386 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 387 __BEGIN_DECLS 388 /* 389 * Packets specific. 390 */ 391 extern int os_packet_set_headroom(const packet_t, const uint8_t); 392 extern uint8_t os_packet_get_headroom(const packet_t); 393 extern int os_packet_set_link_header_length(const packet_t, const uint8_t); 394 extern uint8_t os_packet_get_link_header_length(const packet_t); 395 extern int os_packet_set_link_broadcast(const packet_t); 396 extern boolean_t os_packet_get_link_broadcast(const packet_t); 397 extern int os_packet_set_link_multicast(const packet_t); 398 extern boolean_t os_packet_get_link_multicast(const packet_t); 399 extern int os_packet_set_link_ethfcs(const packet_t); 400 extern boolean_t os_packet_get_link_ethfcs(const packet_t); 401 extern int os_packet_set_transport_traffic_background(const packet_t); 402 extern boolean_t os_packet_get_transport_traffic_background(const packet_t); 403 extern int os_packet_set_transport_traffic_realtime(const packet_t); 404 extern boolean_t os_packet_get_transport_traffic_realtime(const packet_t); 405 extern int os_packet_set_transport_retransmit(const packet_t); 406 extern boolean_t os_packet_get_transport_retransmit(const packet_t); 407 extern int os_packet_set_transport_last_packet(const packet_t); 408 extern int os_packet_set_service_class(const packet_t, 409 const packet_svc_class_t); 410 extern packet_svc_class_t os_packet_get_service_class(const packet_t); 411 extern int os_packet_set_compression_generation_count(const packet_t, const uint32_t); 412 extern int os_packet_get_compression_generation_count(const packet_t, uint32_t *); 413 extern int os_packet_set_traffic_class(const packet_t, packet_traffic_class_t); 414 extern packet_traffic_class_t os_packet_get_traffic_class(const packet_t); 415 extern int os_packet_set_inet_checksum(const packet_t, 416 const packet_csum_flags_t, const uint16_t, const uint16_t); 417 #define HAS_OS_PACKET_ADD_CSUMF 1 418 extern void os_packet_add_inet_csum_flags(const packet_t, const packet_csum_flags_t); 419 extern packet_csum_flags_t os_packet_get_inet_checksum(const packet_t, 420 uint16_t *, uint16_t *); 421 extern void os_packet_set_group_start(const packet_t); 422 extern boolean_t os_packet_get_group_start(const packet_t); 423 extern void os_packet_set_group_end(const packet_t); 424 extern boolean_t os_packet_get_group_end(const packet_t); 425 extern int os_packet_set_expire_time(const packet_t, const uint64_t); 426 extern int os_packet_get_expire_time(const packet_t, uint64_t *); 427 #define HAS_OS_PACKET_EXPIRY_ACTION 1 428 extern int os_packet_set_expiry_action(const packet_t, const packet_expiry_action_t); 429 extern int os_packet_get_expiry_action(const packet_t, packet_expiry_action_t *); 430 extern int os_packet_set_token(const packet_t, const void *, const uint16_t); 431 extern int os_packet_get_packetid(const packet_t, packet_id_t *); 432 extern int os_packet_set_packetid(const packet_t, packet_id_t *); 433 extern int os_packet_set_vlan_tag(const packet_t, const uint16_t, 434 const boolean_t); 435 extern int os_packet_get_vlan_tag(const packet_t, uint16_t *, boolean_t *); 436 extern uint16_t os_packet_get_vlan_id(const uint16_t); 437 extern uint8_t os_packet_get_vlan_priority(const uint16_t); 438 #define HAS_OS_PACKET_GET_WAKE_FLAG 1 439 extern boolean_t os_packet_get_wake_flag(const packet_t); 440 #define HAS_OS_PACKET_KEEP_ALIVE 1 441 extern boolean_t os_packet_get_keep_alive(const packet_t); 442 extern void os_packet_set_keep_alive(const packet_t, const boolean_t); 443 extern boolean_t os_packet_get_truncated(const packet_t); 444 extern uint8_t os_packet_get_aggregation_type(const packet_t); 445 extern int os_packet_set_app_metadata(const packet_t, 446 const packet_app_metadata_type_t, const uint8_t); 447 extern int os_packet_set_protocol_segment_size(const packet_t, const uint16_t); 448 extern void os_packet_set_tso_flags(const packet_t, packet_tso_flags_t); 449 #define AQM_SUPPORTS_L4S 1 450 extern void os_packet_set_l4s_flag(const packet_t); 451 #define AQM_SUPPORTS_PACING 1 452 extern void os_packet_set_tx_timestamp(const packet_t ph, const uint64_t ts); 453 /* 454 * Quantum & Packets. 455 */ 456 extern void os_packet_set_flow_uuid(const packet_t, const uuid_t flow_uuid); 457 extern void os_packet_get_flow_uuid(const packet_t, uuid_t *flow_uuid); 458 extern void os_packet_clear_flow_uuid(const packet_t); 459 extern uint32_t os_packet_get_data_length(const packet_t); 460 extern uint32_t os_packet_get_buflet_count(const packet_t); 461 extern buflet_t os_packet_get_next_buflet(const packet_t, const buflet_t); 462 extern uint32_t os_packet_get_segment_count(const packet_t ph); 463 extern int os_packet_finalize(const packet_t); 464 extern int os_packet_add_buflet(const packet_t ph, const buflet_t bprev, 465 const buflet_t bnew); 466 /* increment use count on packet */ 467 extern int os_packet_increment_use_count(const packet_t ph); 468 /* decrement use count on packet and retrieve new value */ 469 extern int os_packet_decrement_use_count(const packet_t ph, uint16_t *use_cnt); 470 471 extern packet_trace_id_t os_packet_get_trace_id(const packet_t ph); 472 extern void os_packet_set_trace_id(const packet_t ph, packet_trace_id_t); 473 extern void os_packet_trace_event(const packet_t ph, uint32_t); 474 475 /* 476 * Misc. 477 */ 478 extern uint32_t os_inet_checksum(const void *, uint32_t, uint32_t); 479 extern uint32_t os_copy_and_inet_checksum(const void *, void *, 480 uint32_t, uint32_t); 481 482 /* 483 * Buflets. 484 */ 485 #define SUPPORT_LARGE_BUFFER 1 486 extern int os_buflet_set_data_offset(const buflet_t, const uint32_t); 487 extern uint32_t os_buflet_get_data_offset(const buflet_t); 488 extern int os_buflet_set_data_length(const buflet_t, const uint32_t); 489 extern uint32_t os_buflet_get_data_length(const buflet_t); 490 extern void *os_buflet_get_object_address(const buflet_t); 491 extern uint32_t os_buflet_get_object_limit(const buflet_t); 492 extern void *os_buflet_get_data_address(const buflet_t); 493 extern uint32_t os_buflet_get_data_limit(const buflet_t); 494 __END_DECLS 495 #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */ 496 #else /* KERNEL */ 497 /* 498 * Kernel APIs. 499 */ 500 501 /* 502 * Opaque handles. 503 */ 504 struct __kern_buflet; 505 struct kern_pbufpool; 506 struct sksegment; 507 508 typedef struct kern_pbufpool *kern_pbufpool_t; 509 typedef uint64_t kern_packet_t; 510 typedef uint32_t kern_packet_idx_t; 511 typedef struct __kern_buflet *kern_buflet_t; 512 typedef uint32_t kern_obj_idx_seg_t; 513 typedef struct sksegment *kern_segment_t; 514 typedef uint32_t kern_segment_idx_t; 515 516 /* 517 * @typedef pbuf_seg_ctor_fn_t 518 * @abstract Buffer segment constructor callback. 519 * @param buf_seg Buffer segment handle. 520 * @param buf_desc IOSKMemoryDescriptor handle for buffer segment. 521 * @discussion This callback is invoked when a segment has been activated. 522 * If applicable, the owner should wire/prepare the memory and insert 523 * it into the memory mapper (IOMMU/DART) prior to returning. 524 */ 525 typedef void (*pbuf_seg_ctor_fn_t)(const kern_pbufpool_t, 526 const kern_segment_t buf_seg, const IOSKMemoryDescriptor buf_desc); 527 528 /* 529 * @typedef pbuf_seg_dtor_fn_t 530 * @abstract Buffer segment destructor callback. 531 * @param buf_seg Buffer segment handle. 532 * @param buf_desc IOSKMemoryDescriptor handle for buffer segment. 533 * @discussion This callback is invoked when a segment is about to be 534 * freed. The owner should reverse what had been done earlier 535 * at pbuf_seg_ctor_fn_t() constructor time. If applicable, 536 * it should remove the memory from mapper (IOMMU/DART), and 537 * unwire/complete it prior to returning. 538 */ 539 typedef void (*pbuf_seg_dtor_fn_t)(const kern_pbufpool_t, 540 const kern_segment_t buf_seg, const IOSKMemoryDescriptor buf_desc); 541 542 typedef void (*pbuf_ctx_retain_fn_t)(void *const ctx); 543 typedef void (*pbuf_ctx_release_fn_t)(void *const ctx); 544 545 typedef uint8_t pbufpool_name_t[64]; 546 547 /* 548 * Kernel packet buffer pool init. 549 */ 550 struct kern_pbufpool_init { 551 uint32_t kbi_version; /* current version */ 552 pbufpool_name_t kbi_name; /* optional */ 553 uint32_t kbi_flags; /* see KBI_* */ 554 uint32_t kbi_packets; /* required */ 555 uint32_t kbi_max_frags; /* max buflets per packet */ 556 uint32_t kbi_buflets; /* >= packets (optional) */ 557 uint32_t kbi_bufsize; /* required */ 558 uint32_t kbi_buf_seg_size; /* optional */ 559 pbuf_seg_ctor_fn_t kbi_buf_seg_ctor; /* optional */ 560 pbuf_seg_dtor_fn_t kbi_buf_seg_dtor; /* optional */ 561 void * kbi_ctx; /* optional */ 562 pbuf_ctx_retain_fn_t kbi_ctx_retain; /* optional */ 563 pbuf_ctx_release_fn_t kbi_ctx_release; /* optional */ 564 }; 565 566 #define KBIF_QUANTUM 0x1 /* simple packet (non-networking) */ 567 #define KBIF_PERSISTENT 0x2 /* persistent memory (wired) */ 568 #define KBIF_MONOLITHIC 0x4 /* single segment mode */ 569 #define KBIF_BUFFER_ON_DEMAND 0x8 /* attach/detach buffers on demand */ 570 #define KBIF_INHIBIT_CACHE 0x10 /* caching-inhibited */ 571 #define KBIF_USER_ACCESS 0x20 /* allow userspace access */ 572 #define KBIF_VIRTUAL_DEVICE 0x40 /* device is virtual (no DMA) */ 573 #define KBIF_PHYS_CONTIGUOUS 0x80 /* physically-contiguous segment(s) */ 574 #define KBIF_IODIR_IN 0x100 /* io direction in (device to host) */ 575 #define KBIF_IODIR_OUT 0x200 /* io direction out (host to device) */ 576 #define KBIF_KERNEL_READONLY 0x400 /* kernel read-only */ 577 #define KBIF_NO_MAGAZINES 0x800 /* disable per-CPU magazines layer */ 578 #define KBIF_THREADSAFE 0x2000 /* thread safe memory descriptor */ 579 580 #define KERN_PBUFPOOL_VERSION_1 1 581 #define KERN_PBUFPOOL_VERSION_2 2 /* added ctx retain/release */ 582 #define KERN_PBUFPOOL_CURRENT_VERSION KERN_PBUFPOOL_VERSION_2 583 584 /* 585 * Kernel packet buffer pool memory info. 586 */ 587 struct kern_pbufpool_memory_info { 588 uint32_t kpm_flags; /* see KPMF_* */ 589 uint32_t kpm_packets; /* number of packets */ 590 uint32_t kpm_max_frags; /* max buflets per packet */ 591 uint32_t kpm_buflets; /* number of buflets */ 592 uint32_t kpm_bufsize; /* size of each buffer */ 593 uint32_t kpm_bufsegs; /* number of buffer segments */ 594 uint32_t kpm_buf_seg_size; /* size of a buffer segment */ 595 uint32_t kpm_buf_obj_size; /* size of the shared buffer object */ 596 } __attribute__((aligned(64))); 597 598 #define KPMF_EXTERNAL 0x1 /* externally configured */ 599 600 /* 601 * Kernel packet representation of packet_svc_class_t. 602 * 603 * We have a separate enum to separate the namespace just in case we need it. 604 */ 605 typedef enum { 606 #ifdef BSD_KERNEL_PRIVATE 607 KPKT_SC_UNSPEC = -1, /* Internal: not specified */ 608 #endif /* BSD_KERNEL_PRIVATE */ 609 KPKT_SC_BK_SYS = PKT_SC_BK_SYS, /* lowest class */ 610 KPKT_SC_BK = PKT_SC_BK, 611 612 KPKT_SC_BE = PKT_SC_BE, 613 KPKT_SC_RD = PKT_SC_RD, 614 KPKT_SC_OAM = PKT_SC_OAM, 615 616 KPKT_SC_AV = PKT_SC_AV, 617 KPKT_SC_RV = PKT_SC_RV, 618 KPKT_SC_VI = PKT_SC_VI, 619 KPKT_SC_SIG = PKT_SC_SIG, 620 621 KPKT_SC_VO = PKT_SC_VO, 622 KPKT_SC_CTL = PKT_SC_CTL, /* highest class */ 623 } kern_packet_svc_class_t; 624 625 /* Maximum number of KPKT_SC values (excluding KPKT_SC_UNSPEC) */ 626 #define KPKT_SC_MAX_CLASSES 10 627 628 #define KPKT_VALID_SVC(c) \ 629 (c == KPKT_SC_BK_SYS || c == KPKT_SC_BK || c == KPKT_SC_BE || \ 630 c == KPKT_SC_RD || c == KPKT_SC_OAM || c == KPKT_SC_AV || \ 631 c == KPKT_SC_RV || c == KPKT_SC_VI || c == KPKT_SC_SIG || \ 632 c == KPKT_SC_VO || c == KPKT_SC_CTL) 633 634 #define KPKT_SVCIDX(c) ((((c) >> 16) & 0xff) >> 3) 635 636 /* 637 * Kernel packet representation of packet_traffic_class_t. 638 * 639 * We have a separate enum to separate the namespace just in case we need it. 640 */ 641 typedef enum { 642 #ifdef BSD_KERNEL_PRIVATE 643 KPKT_TC_UNSPEC = -1, /* Internal: not specified */ 644 #endif /* BSD_KERNEL_PRIVATE */ 645 KPKT_TC_BE = PKT_TC_BE, 646 KPKT_TC_BK = PKT_TC_BK, 647 KPKT_TC_VI = PKT_TC_VI, 648 KPKT_TC_VO = PKT_TC_VO, 649 #ifdef BSD_KERNEL_PRIVATE 650 KPKT_TC_MAX = 4, /* Internal: traffic class count */ 651 #endif /* BSD_KERNEL_PRIVATE */ 652 } kern_packet_traffic_class_t; 653 654 /* 655 * Modes for cloning a kernel packet. 656 * 657 * The "heavy" mode copies most of the metadata (except those pertaining 658 * to linkages to other objects), allocates new buffer(s) for the 659 * cloned packet, and copies old buffer(s) to new one(s). 660 * 661 * The "light" mode is to be used on a packet that's recently allocated, 662 * as the cloning process involves copying minimal metadata information, 663 * as well as adding reference(s) to the buffer(s) rather than copying. 664 */ 665 typedef enum { 666 KPKT_COPY_HEAVY = 0, /* copy everything including buffers */ 667 KPKT_COPY_LIGHT /* minimal copy, adding refs to buffers */ 668 } kern_packet_copy_mode_t; 669 670 671 __BEGIN_DECLS 672 /* 673 * Packets specific. 674 */ 675 extern errno_t kern_packet_set_headroom(const kern_packet_t, const uint8_t); 676 extern uint8_t kern_packet_get_headroom(const kern_packet_t); 677 /* deprecated -- use kern_packet_set_headroom instead */ 678 extern errno_t kern_packet_set_link_header_offset(const kern_packet_t, 679 const uint8_t); 680 /* deprecated -- use kern_packet_get_headroom instead */ 681 extern uint16_t kern_packet_get_link_header_offset(const kern_packet_t); 682 extern errno_t kern_packet_set_link_header_length(const kern_packet_t, 683 const uint8_t); 684 extern uint8_t kern_packet_get_link_header_length(const kern_packet_t); 685 extern errno_t kern_packet_set_link_broadcast(const kern_packet_t); 686 extern boolean_t kern_packet_get_link_broadcast(const kern_packet_t); 687 extern errno_t kern_packet_set_link_multicast(const kern_packet_t); 688 extern boolean_t kern_packet_get_link_multicast(const kern_packet_t); 689 extern errno_t kern_packet_set_link_ethfcs(const kern_packet_t); 690 extern boolean_t kern_packet_get_link_ethfcs(const kern_packet_t); 691 /* deprecated -- use kern_packet_set_link_header_length instead */ 692 extern errno_t kern_packet_set_network_header_offset(const kern_packet_t, 693 const uint16_t); 694 /* deprecated -- use kern_packet_get_link_header_length instead */ 695 extern uint16_t kern_packet_get_network_header_offset(const kern_packet_t); 696 extern errno_t kern_packet_set_transport_traffic_background( 697 const kern_packet_t); 698 extern boolean_t kern_packet_get_transport_traffic_background( 699 const kern_packet_t); 700 extern errno_t kern_packet_set_transport_traffic_realtime(const kern_packet_t); 701 extern boolean_t kern_packet_get_transport_traffic_realtime( 702 const kern_packet_t); 703 /* deprecated */ 704 extern errno_t kern_packet_set_transport_header_offset(const kern_packet_t, 705 const uint16_t); 706 /* deprecated */ 707 extern uint16_t kern_packet_get_transport_header_offset(const kern_packet_t); 708 extern errno_t kern_packet_set_transport_retransmit(const kern_packet_t); 709 extern boolean_t kern_packet_get_transport_retransmit(const kern_packet_t); 710 extern boolean_t kern_packet_get_transport_new_flow(const kern_packet_t); 711 extern boolean_t kern_packet_get_transport_last_packet(const kern_packet_t); 712 extern errno_t kern_packet_set_service_class(const kern_packet_t, 713 const kern_packet_svc_class_t); 714 extern kern_packet_svc_class_t kern_packet_get_service_class( 715 const kern_packet_t); 716 extern errno_t kern_packet_get_service_class_index( 717 const kern_packet_svc_class_t, uint32_t *); 718 #define HAS_KERN_PACKET_COMPRESSION_GENERATION_COUNT 1 719 extern errno_t kern_packet_set_compression_generation_count(const kern_packet_t, 720 const uint32_t); 721 extern errno_t kern_packet_get_compression_generation_count(const kern_packet_t, uint32_t *); 722 extern boolean_t kern_packet_is_high_priority( 723 const kern_packet_t); 724 extern errno_t kern_packet_set_traffic_class(const kern_packet_t, 725 kern_packet_traffic_class_t); 726 extern kern_packet_traffic_class_t kern_packet_get_traffic_class( 727 const kern_packet_t); 728 extern errno_t kern_packet_set_inet_checksum(const kern_packet_t, 729 const packet_csum_flags_t, const uint16_t, const uint16_t, boolean_t); 730 extern packet_csum_flags_t kern_packet_get_inet_checksum(const kern_packet_t, 731 uint16_t *, uint16_t *, boolean_t); 732 extern errno_t kern_packet_get_timestamp(const kern_packet_t, uint64_t *, 733 boolean_t *); 734 extern errno_t kern_packet_set_timestamp(const kern_packet_t, uint64_t, 735 boolean_t); 736 extern errno_t kern_packet_get_timestamp_requested(const kern_packet_t, 737 boolean_t *); 738 extern errno_t kern_packet_get_tx_completion_status(const kern_packet_t, 739 kern_return_t *); 740 extern errno_t kern_packet_set_tx_completion_status(const kern_packet_t, 741 kern_return_t); 742 extern void kern_packet_tx_completion(const kern_packet_t, ifnet_t); 743 extern void kern_packet_set_group_start(const kern_packet_t); 744 extern boolean_t kern_packet_get_group_start(const kern_packet_t); 745 extern void kern_packet_set_group_end(const kern_packet_t); 746 extern boolean_t kern_packet_get_group_end(const kern_packet_t); 747 extern errno_t kern_packet_set_expire_time(const kern_packet_t, const uint64_t); 748 extern errno_t kern_packet_get_expire_time(const kern_packet_t, uint64_t *); 749 extern errno_t kern_packet_set_token(const kern_packet_t, const void *, 750 const uint16_t); 751 extern errno_t kern_packet_get_token(const kern_packet_t, void *, uint16_t *); 752 extern errno_t kern_packet_get_packetid(const kern_packet_t, packet_id_t *); 753 extern errno_t kern_packet_set_vlan_tag(const kern_packet_t, const uint16_t, 754 const boolean_t); 755 extern errno_t kern_packet_get_vlan_tag(const kern_packet_t, uint16_t *, 756 boolean_t *); 757 extern uint16_t kern_packet_get_vlan_id(const uint16_t); 758 extern uint8_t kern_packet_get_vlan_priority(const uint16_t); 759 extern void kern_packet_set_wake_flag(const kern_packet_t); 760 extern boolean_t kern_packet_get_wake_flag(const kern_packet_t); 761 extern errno_t kern_packet_get_flowid(const kern_packet_t, packet_flowid_t *); 762 extern void kern_packet_set_trace_tag(const kern_packet_t ph, packet_trace_tag_t tag); 763 extern packet_trace_tag_t kern_packet_get_trace_tag(const kern_packet_t ph); 764 extern errno_t kern_packet_get_tx_nexus_port_id(const kern_packet_t, 765 uint32_t *); 766 extern errno_t kern_packet_get_app_metadata(const kern_packet_t, 767 packet_app_metadata_type_t *, uint8_t *); 768 #define NEW_KERN_PACKET_GET_PROTOCOL_SEGMENT_SIZE 1 769 extern uint16_t kern_packet_get_protocol_segment_size(const kern_packet_t); 770 extern void * kern_packet_get_priv(const kern_packet_t); 771 extern void kern_packet_set_priv(const kern_packet_t, void *); 772 extern void kern_packet_get_tso_flags(const kern_packet_t, packet_tso_flags_t *); 773 void kern_packet_set_segment_count(const kern_packet_t, uint8_t); 774 775 /* 776 * Expiry notification 777 */ 778 extern errno_t kern_packet_set_expiry_action(const kern_packet_t, const packet_expiry_action_t); 779 extern errno_t kern_packet_get_expiry_action(const kern_packet_t, packet_expiry_action_t *); 780 extern errno_t kern_packet_check_for_expiry_and_notify(const kern_packet_t ph, ifnet_t ifp, 781 uint16_t origin, uint16_t status); 782 783 /* 784 * Quantum & Packets. 785 */ 786 extern void kern_packet_set_flow_uuid(const kern_packet_t, const uuid_t); 787 extern void kern_packet_get_flow_uuid(const kern_packet_t, uuid_t *); 788 extern void kern_packet_clear_flow_uuid(const kern_packet_t); 789 extern void kern_packet_get_euuid(const kern_packet_t, uuid_t); 790 extern void kern_packet_set_policy_id(const kern_packet_t, uint32_t); 791 extern uint32_t kern_packet_get_policy_id(const kern_packet_t); 792 extern void kern_packet_set_skip_policy_id(const kern_packet_t, uint32_t); 793 extern uint32_t kern_packet_get_skip_policy_id(const kern_packet_t); 794 extern kern_packet_idx_t kern_packet_get_object_index(const kern_packet_t); 795 extern uint32_t kern_packet_get_data_length(const kern_packet_t); 796 extern uint32_t kern_packet_get_buflet_count(const kern_packet_t); 797 extern errno_t kern_packet_set_buflet_count(const kern_packet_t, uint32_t); 798 extern kern_buflet_t kern_packet_get_next_buflet(const kern_packet_t, 799 const kern_buflet_t); 800 extern errno_t kern_packet_finalize(const kern_packet_t); 801 extern errno_t kern_packet_clone(const kern_packet_t, kern_packet_t *, 802 kern_packet_copy_mode_t); 803 extern errno_t kern_packet_clone_nosleep(const kern_packet_t, kern_packet_t *, 804 kern_packet_copy_mode_t); 805 extern errno_t kern_packet_add_buflet(const kern_packet_t ph, 806 const kern_buflet_t bprev, const kern_buflet_t bnew); 807 extern void kern_packet_append(const kern_packet_t, const kern_packet_t); 808 extern kern_packet_t kern_packet_get_next(const kern_packet_t); 809 extern void kern_packet_set_next(const kern_packet_t, const kern_packet_t); 810 extern void kern_packet_set_chain_counts(const kern_packet_t, uint32_t, 811 uint32_t); 812 extern void kern_packet_get_chain_counts(const kern_packet_t, uint32_t *, 813 uint32_t *); 814 815 /* 816 * Misc. 817 */ 818 extern uint32_t kern_inet_checksum(const void *, uint32_t, uint32_t); 819 extern uint32_t kern_copy_and_inet_checksum(const void *, void *, 820 uint32_t, uint32_t); 821 extern void kern_packet_set_trace_id(const kern_packet_t, packet_trace_id_t); 822 extern packet_trace_id_t kern_packet_get_trace_id(const kern_packet_t); 823 extern void kern_packet_trace_event(const kern_packet_t, uint32_t); 824 extern errno_t kern_packet_copy_bytes(const kern_packet_t, size_t, size_t, 825 void*); 826 827 /* 828 * Buflets. 829 */ 830 extern errno_t kern_buflet_set_data_address(const kern_buflet_t, const void *); 831 extern void *kern_buflet_get_data_address(const kern_buflet_t); 832 extern errno_t kern_buflet_set_data_offset(const kern_buflet_t, const uint32_t); 833 extern uint32_t kern_buflet_get_data_offset(const kern_buflet_t); 834 extern errno_t kern_buflet_set_data_length(const kern_buflet_t, const uint32_t); 835 extern uint32_t kern_buflet_get_data_length(const kern_buflet_t); 836 extern void *kern_buflet_get_object_address(const kern_buflet_t); 837 extern uint32_t kern_buflet_get_object_limit(const kern_buflet_t); 838 extern kern_segment_t kern_buflet_get_object_segment(const kern_buflet_t, 839 kern_obj_idx_seg_t *); 840 extern errno_t kern_buflet_set_data_limit(const kern_buflet_t, const uint32_t); 841 extern uint32_t kern_buflet_get_data_limit(const kern_buflet_t); 842 extern errno_t kern_buflet_set_buffer_offset(const kern_buflet_t, const uint32_t); 843 844 /* 845 * Packet buffer pool. 846 */ 847 typedef void (*alloc_cb_func_t)(kern_packet_t packet, uint32_t pkt_index, 848 const void *ctx); 849 extern errno_t kern_pbufpool_create(const struct kern_pbufpool_init *, 850 kern_pbufpool_t *, struct kern_pbufpool_memory_info *); 851 extern void *kern_pbufpool_get_context(const kern_pbufpool_t pbufpool); 852 extern errno_t kern_pbufpool_get_memory_info(const kern_pbufpool_t pbufpool, 853 struct kern_pbufpool_memory_info *pbufpool_mem_ref); 854 extern errno_t kern_pbufpool_alloc(const kern_pbufpool_t pbufpool, 855 const uint32_t bufcnt, kern_packet_t *packet); 856 extern errno_t kern_pbufpool_alloc_batch(const kern_pbufpool_t pbufpool, 857 const uint32_t bufcnt, kern_packet_t *array, uint32_t *size); 858 extern errno_t kern_pbufpool_alloc_batch_callback( 859 const kern_pbufpool_t pbufpool, const uint32_t bufcnt, kern_packet_t *array, 860 uint32_t *size, alloc_cb_func_t cb, const void *ctx); 861 extern errno_t kern_pbufpool_alloc_nosleep(const kern_pbufpool_t pbufpool, 862 const uint32_t bufcnt, kern_packet_t *packet); 863 extern errno_t kern_pbufpool_alloc_batch_nosleep(const kern_pbufpool_t pbufpool, 864 const uint32_t bufcnt, kern_packet_t *array, uint32_t *size); 865 extern errno_t kern_pbufpool_alloc_batch_nosleep_callback( 866 const kern_pbufpool_t pbufpool, const uint32_t bufcnt, 867 kern_packet_t *array, uint32_t *size, alloc_cb_func_t cb, const void *ctx); 868 extern void kern_pbufpool_free(const kern_pbufpool_t pbufpool, kern_packet_t); 869 extern void kern_pbufpool_free_batch(const kern_pbufpool_t pbufpool, 870 kern_packet_t *array, uint32_t size); 871 extern void kern_pbufpool_free_chain(const kern_pbufpool_t pbufpool, 872 kern_packet_t chain); 873 extern errno_t kern_pbufpool_alloc_buffer(const kern_pbufpool_t pbufpool, 874 mach_vm_address_t *buffer, kern_segment_t *sg, kern_obj_idx_seg_t *sg_idx); 875 extern errno_t kern_pbufpool_alloc_buffer_nosleep(const kern_pbufpool_t 876 pbufpool, mach_vm_address_t *buffer, kern_segment_t *sg, 877 kern_obj_idx_seg_t *sg_idx); 878 extern void kern_pbufpool_free_buffer(const kern_pbufpool_t pbufpool, 879 mach_vm_address_t baddr); 880 extern errno_t kern_pbufpool_alloc_buflet(const kern_pbufpool_t, 881 kern_buflet_t *); 882 extern errno_t kern_pbufpool_alloc_buflet_nosleep(const kern_pbufpool_t, 883 kern_buflet_t *); 884 extern void kern_pbufpool_destroy(kern_pbufpool_t); 885 extern kern_segment_idx_t kern_segment_get_index(const kern_segment_t); 886 __END_DECLS 887 #endif /* KERNEL */ 888 #endif /* PRIVATE */ 889 #endif /* !_SKYWALK_OS_PACKET_H_ */ 890