This is xnu-11215.1.10. See this file in:
/*
* Copyright (c) 2017-2024 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#ifndef _SKYWALK_OS_SYSCTLS_H_
#define _SKYWALK_OS_SYSCTLS_H_
#if defined(PRIVATE) || defined(BSD_KERNEL_PRIVATE)
#include <stdint.h>
/*
* X (type, field, default_value)
*
* Note: When defining X, be sure to use '...' such that adding fields will
* not break building your project. See the use of SKMEM_SYSCTL_TCP_LIST
* to define struct skmem_sysctl below for an example.
*/
#define SKMEM_SYSCTL_TCP_LIST \
X(int32_t, bg_target_qdelay, 40) \
X(int32_t, bg_allowed_increase, 8) \
X(int32_t, bg_tether_shift, 1) \
X(uint32_t, bg_ss_fltsz, 2) \
X(int32_t, use_newreno, 0) \
X(int32_t, cubic_tcp_friendliness, 0) \
X(int32_t, cubic_fast_convergence, 0) \
X(int32_t, cubic_use_minrtt, 0) \
X(int32_t, delayed_ack, 3) \
X(int32_t, recvbg, 0) \
X(int32_t, drop_synfin, 1) \
X(int32_t, slowlink_wsize, 8192) \
X(int32_t, maxseg_unacked, 8) \
X(int32_t, rfc3465, 1) \
X(int32_t, rfc3465_lim2, 1) \
X(int32_t, recv_allowed_iaj, 5) \
X(uint32_t, doautorcvbuf, 1) \
X(uint32_t, autorcvbufmax, 2 * 1024 * 1024) \
X(int32_t, rcvsspktcnt, 512) \
X(int32_t, path_mtu_discovery, 1) \
X(int32_t, local_slowstart_flightsize, 8) \
X(uint32_t, ecn_setup_percentage, 50) \
X(int32_t, ecn_initiate_out, 0) \
X(int32_t, ecn_negotiate_in, 0) \
X(int32_t, packetchain, 50) \
X(int32_t, socket_unlocked_on_output, 1) \
X(int32_t, min_iaj_win, 16) \
X(int32_t, acc_iaj_react_limit, 200) \
X(uint32_t, autosndbufinc, 8 * 1024) \
X(uint32_t, autosndbufmax, 2 * 1024 * 1024) \
X(uint32_t, rtt_recvbg, 1) \
X(uint32_t, recv_throttle_minwin, 16 * 1024) \
X(int32_t, enable_tlp, 1) \
X(int32_t, sack, 1) \
X(int32_t, sack_maxholes, 128) \
X(int32_t, sack_globalmaxholes, 65536) \
X(int32_t, mssdflt, 512) \
X(int32_t, v6mssdflt, 1024) \
X(int32_t, fastopen_backlog, 10) \
X(int32_t, fastopen, 0x3) \
X(int32_t, minmss, 216) \
X(int32_t, icmp_may_rst, 1) \
X(int32_t, rtt_min, 100) \
X(int32_t, rexmt_slop, 200) \
X(int32_t, randomize_ports, 0) \
X(int32_t, win_scale_factor, 3) \
X(int32_t, keepinit, 75 * 1000) \
X(int32_t, keepidle, 120 * 60 * 1000) \
X(int32_t, keepintvl, 75 * 1000) \
X(int32_t, keepcnt, 8) \
X(int32_t, msl, 15 * 1000) \
X(uint32_t, max_persist_timeout, 0) \
X(int32_t, always_keepalive, 0) \
X(uint32_t, timer_fastmode_idlemax, 10) \
X(int32_t, broken_peer_syn_rexmit_thres, 10) \
X(int32_t, pmtud_blackhole_detection, 1) \
X(uint32_t, pmtud_blackhole_mss, 1200) \
X(int32_t, sendspace, 1448*256) \
X(int32_t, recvspace, 1448*384) \
X(uint32_t, microuptime_init, 0) \
X(uint32_t, now_init, 0) \
X(uint32_t, challengeack_limit, 10) \
X(int32_t, do_rfc5961, 1) \
X(int32_t, init_rtt_from_cache, 1) \
X(uint32_t, autotunereorder, 1) \
X(uint32_t, do_ack_compression, 1) \
X(uint32_t, ack_compression_rate, 5) \
X(int32_t, do_better_lr, 1) \
X(int32_t, cubic_minor_fixes, 1) \
X(int32_t, cubic_rfc_compliant, 1) \
X(int32_t, aggressive_rcvwnd_inc, 1) \
X(int32_t, ack_strategy, 1) \
X(int32_t, flow_control_response, 1) \
X(int32_t, randomize_timestamps, 1) \
X(uint32_t, ledbat_plus_plus, 1) \
X(uint32_t, use_ledbat, 0) \
X(uint32_t, rledbat, 1) \
X(uint32_t, use_min_curr_rtt, 1) \
X(uint32_t, fin_timeout, 30) \
X(uint32_t, accurate_ecn, 0) \
X(int32_t, tso, 1) \
X(int32_t, awdl_rtobase, 100) \
X(int32_t, rack, 1) \
X(int32_t, l4s, 0)
#define SKMEM_SYSCTL_KERN_IPC_LIST \
X(uint32_t, throttle_best_effort, 0)
#define SKMEM_SYSCTL_TCP_HAS_DEFAULT_VALUES 1
#define SKMEM_SYSCTL_TCP_HAS_INIT_TIME 1
#define SKMEM_SYSCTL_TCP_HAS_LEDBAT_PLUS_PLUS 1
#define SKMEM_SYSCTL_TCP_HAS_RLEDBAT 1
#define SKMEM_SYSCTL_TCP_HAS_FIN_TIMEOUT 1
#define SKMEM_SYSCTL_TCP_HAS_ACC_ECN 1
#define SKMEM_SYSCTL_TCP_HAS_ACC_ECN_OPTION 1
#define SKMEM_SYSCTL_TCP_HAS_AWDL_RTOBASE 1
#define SKMEM_SYSCTL_TCP_HAS_RACK 1
#define SKMEM_SYSCTL_TCP_HAS_L4S 1
/*
* When adding a new type above, be sure to add a corresponding
* printf format below. Clients use NW_SYSCTL_PRI_##type
*/
#define NW_SYSCTL_PRI_int32_t PRIi32
#define NW_SYSCTL_PRI_uint32_t PRIu32
#define SKMEM_SYSCTL_VERSION 3
typedef struct skmem_sysctl {
uint32_t version;
struct {
#define X(type, field, ...) type field;
SKMEM_SYSCTL_TCP_LIST
#undef X
} tcp;
struct {
struct {
#define X(type, field, ...) type field;
SKMEM_SYSCTL_KERN_IPC_LIST
#undef X
} ipc;
} kern;
} skmem_sysctl;
/*
* Skywalk logical link information
* Output: Array of struct nx_llink_info entry (per logical link).
*/
#define SK_LLINK_LIST_SYSCTL "kern.skywalk.llink_list"
#ifdef KERNEL
/*
* SYSCTL_SKMEM is infrastructure for keeping a shared memory region
* in sync with a subset of syctl values in the networking stack.
*/
__BEGIN_DECLS
extern uint32_t sk_sys_objsize;
extern void skmem_sysctl_init(void);
extern void *__sized_by(sk_sys_objsize) skmem_get_sysctls_obj(size_t *);
extern int skmem_sysctl_handle_int(struct sysctl_oid *oidp, void *arg1,
int arg2, struct sysctl_req *req);
__END_DECLS
#define SYSCTL_SKMEM_UPDATE_FIELD(field, value) do { \
skmem_sysctl *__single swptr = skmem_get_sysctls_obj(NULL); \
if (swptr) { \
swptr->field = value; \
} \
} while (0)
/*
* Danger - the void* cast below eliminates an alignment warning.
* In this case it should be safe because offset should be an offset in to
* the structure, so it should already be aligned. Nonetheless, there's
* still a check above to ensure offset is aligned properly.
*/
#define SYSCTL_SKMEM_UPDATE_AT_OFFSET(offset, value) do { \
if (offset >= 0 && \
offset + sizeof (typeof(value)) <= sizeof (skmem_sysctl)) { \
skmem_sysctl *__single swptr = skmem_get_sysctls_obj(NULL); \
void *offp = (u_int8_t *__bidi_indexable) \
(skmem_sysctl *__bidi_indexable)swptr + offset; \
if (swptr && \
((uintptr_t)offp) % _Alignof(typeof(value)) == 0) { \
*(typeof(value)*)offp = (value); \
} \
} \
} while (0)
#define SYSCTL_SKMEM_INT(parent, oid, sysctl_name, access, ptr, offset, descr) \
SYSCTL_OID(parent, oid, sysctl_name, CTLTYPE_INT|access, \
ptr, offset, skmem_sysctl_handle_int, "I", descr); \
_Static_assert((__builtin_constant_p(ptr) || \
sizeof (*(ptr)) == sizeof (int)), "invalid ptr"); \
_Static_assert(offset % _Alignof(int) == 0, "invalid offset")
#define SYSCTL_SKMEM_TCP_INT(oid, sysctl_name, access, variable_type, \
variable_name, initial_value, descr) \
variable_type variable_name = initial_value; \
SYSCTL_SKMEM_INT(_net_inet_tcp, oid, sysctl_name, access, \
&variable_name, offsetof(skmem_sysctl, tcp.sysctl_name), descr)
#define SYSCTL_SKMEM_KERN_IPC_INT(oid, sysctl_name, access, variable_type, \
variable_name, initial_value, descr) \
variable_type variable_name = initial_value; \
SYSCTL_SKMEM_INT(_kern_ipc, oid, sysctl_name, access, \
&variable_name, offsetof(skmem_sysctl, kern.ipc.sysctl_name), descr)
#endif /* KERNEL */
#endif /* PRIVATE || BSD_KERNEL_PRIVATE */
#endif /* _SKYWALK_OS_SYSCTLS_H_ */