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gems-kernel/source/THIRDPARTY/xnu/bsd/netinet/in_tclass.c
Sam Sneed f5727805f2 add darwin/xnu functionality
2024-06-03 11:29:39 -05:00

2288 lines
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/*
* Copyright (c) 2009-2021 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@
*/
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/types.h>
#include <sys/filedesc.h>
#include <sys/file_internal.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/errno.h>
#include <sys/protosw.h>
#include <sys/domain.h>
#include <sys/mbuf.h>
#include <sys/queue.h>
#include <sys/sysctl.h>
#include <sys/sysproto.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/in_pcb.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_var.h>
#include <netinet/tcp_cc.h>
#include <netinet/in_tclass.h>
#include <os/log.h>
static_assert(_SO_TC_MAX == SO_TC_STATS_MAX);
struct net_qos_dscp_map {
uint8_t sotc_to_dscp[SO_TC_MAX];
uint8_t netsvctype_to_dscp[_NET_SERVICE_TYPE_COUNT];
};
struct dcsp_msc_map {
uint8_t dscp;
mbuf_svc_class_t msc;
};
static inline int so_throttle_best_effort(struct socket *, struct ifnet *);
static void set_dscp_to_wifi_ac_map(const struct dcsp_msc_map *, int);
static errno_t dscp_msc_map_from_netsvctype_dscp_map(struct netsvctype_dscp_map *, size_t,
struct dcsp_msc_map *);
static LCK_GRP_DECLARE(tclass_lck_grp, "tclass");
static LCK_MTX_DECLARE(tclass_lock, &tclass_lck_grp);
SYSCTL_NODE(_net, OID_AUTO, qos,
CTLFLAG_RW | CTLFLAG_LOCKED, 0, "QoS");
static int sysctl_default_netsvctype_to_dscp_map SYSCTL_HANDLER_ARGS;
SYSCTL_PROC(_net_qos, OID_AUTO, default_netsvctype_to_dscp_map,
CTLTYPE_STRUCT | CTLFLAG_RW | CTLFLAG_LOCKED,
0, 0, sysctl_default_netsvctype_to_dscp_map, "S", "");
static int sysctl_dscp_to_wifi_ac_map SYSCTL_HANDLER_ARGS;
SYSCTL_PROC(_net_qos, OID_AUTO, dscp_to_wifi_ac_map,
CTLTYPE_STRUCT | CTLFLAG_RW | CTLFLAG_LOCKED,
0, 0, sysctl_dscp_to_wifi_ac_map, "S", "");
static int sysctl_reset_dscp_to_wifi_ac_map SYSCTL_HANDLER_ARGS;
SYSCTL_PROC(_net_qos, OID_AUTO, reset_dscp_to_wifi_ac_map,
CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_LOCKED,
0, 0, sysctl_reset_dscp_to_wifi_ac_map, "I", "");
int net_qos_verbose = 0;
SYSCTL_INT(_net_qos, OID_AUTO, verbose,
CTLFLAG_RW | CTLFLAG_LOCKED, &net_qos_verbose, 0, "");
/*
* Fastlane QoS policy:
* By Default allow all apps to get traffic class to DSCP mapping
*/
SYSCTL_NODE(_net_qos, OID_AUTO, policy,
CTLFLAG_RW | CTLFLAG_LOCKED, 0, "");
int net_qos_policy_restricted = 0;
SYSCTL_INT(_net_qos_policy, OID_AUTO, restricted,
CTLFLAG_RW | CTLFLAG_LOCKED, &net_qos_policy_restricted, 0, "");
int net_qos_policy_restrict_avapps = 0;
SYSCTL_INT(_net_qos_policy, OID_AUTO, restrict_avapps,
CTLFLAG_RW | CTLFLAG_LOCKED, &net_qos_policy_restrict_avapps, 0, "");
int net_qos_policy_wifi_enabled = 0;
SYSCTL_INT(_net_qos_policy, OID_AUTO, wifi_enabled,
CTLFLAG_RW | CTLFLAG_LOCKED, &net_qos_policy_wifi_enabled, 0, "");
int net_qos_policy_capable_enabled = 0;
SYSCTL_INT(_net_qos_policy, OID_AUTO, capable_enabled,
CTLFLAG_RW | CTLFLAG_LOCKED, &net_qos_policy_capable_enabled, 0, "");
/*
* Socket traffic class from network service type
*/
const int sotc_by_netservicetype[_NET_SERVICE_TYPE_COUNT] = {
SO_TC_BE, /* NET_SERVICE_TYPE_BE */
SO_TC_BK, /* NET_SERVICE_TYPE_BK */
SO_TC_VI, /* NET_SERVICE_TYPE_SIG */
SO_TC_VI, /* NET_SERVICE_TYPE_VI */
SO_TC_VO, /* NET_SERVICE_TYPE_VO */
SO_TC_RV, /* NET_SERVICE_TYPE_RV */
SO_TC_AV, /* NET_SERVICE_TYPE_AV */
SO_TC_OAM, /* NET_SERVICE_TYPE_OAM */
SO_TC_RD /* NET_SERVICE_TYPE_RD */
};
/*
* DSCP mappings for QoS Fastlane as based on network service types
*/
static const
struct netsvctype_dscp_map fastlane_netsvctype_dscp_map[_NET_SERVICE_TYPE_COUNT] = {
{ .netsvctype = NET_SERVICE_TYPE_BE, .dscp = _DSCP_DF },
{ .netsvctype = NET_SERVICE_TYPE_BK, .dscp = _DSCP_AF11 },
{ .netsvctype = NET_SERVICE_TYPE_SIG, .dscp = _DSCP_CS3 },
{ .netsvctype = NET_SERVICE_TYPE_VI, .dscp = _DSCP_AF41 },
{ .netsvctype = NET_SERVICE_TYPE_VO, .dscp = _DSCP_EF },
{ .netsvctype = NET_SERVICE_TYPE_RV, .dscp = _DSCP_CS4 },
{ .netsvctype = NET_SERVICE_TYPE_AV, .dscp = _DSCP_AF31 },
{ .netsvctype = NET_SERVICE_TYPE_OAM, .dscp = _DSCP_CS2 },
{ .netsvctype = NET_SERVICE_TYPE_RD, .dscp = _DSCP_AF21 },
};
/*
* DSCP mappings for QoS RFC4594 as based on network service types
*/
static const
struct netsvctype_dscp_map rfc4594_netsvctype_dscp_map[_NET_SERVICE_TYPE_COUNT] = {
{ .netsvctype = NET_SERVICE_TYPE_BE, .dscp = _DSCP_DF },
{ .netsvctype = NET_SERVICE_TYPE_BK, .dscp = _DSCP_CS1 },
{ .netsvctype = NET_SERVICE_TYPE_SIG, .dscp = _DSCP_CS5 },
{ .netsvctype = NET_SERVICE_TYPE_VI, .dscp = _DSCP_AF41 },
{ .netsvctype = NET_SERVICE_TYPE_VO, .dscp = _DSCP_EF },
{ .netsvctype = NET_SERVICE_TYPE_RV, .dscp = _DSCP_CS4 },
{ .netsvctype = NET_SERVICE_TYPE_AV, .dscp = _DSCP_AF31 },
{ .netsvctype = NET_SERVICE_TYPE_OAM, .dscp = _DSCP_CS2 },
{ .netsvctype = NET_SERVICE_TYPE_RD, .dscp = _DSCP_AF21 },
};
static struct net_qos_dscp_map fastlane_net_qos_dscp_map;
static struct net_qos_dscp_map rfc4594_net_qos_dscp_map;
#if (DEBUG || DEVELOPMENT)
static struct net_qos_dscp_map custom_net_qos_dscp_map;
#endif /* (DEBUG || DEVELOPMENT) */
/*
* The size is one more than the max because DSCP start at zero
*/
#define DSCP_ARRAY_SIZE (_MAX_DSCP + 1)
/*
* The DSCP to UP mapping (via mbuf service class) for WiFi follows is the mapping
* that implemented at the 802.11 driver level when the mbuf service class is
* MBUF_SC_BE.
*
* This clashes with the recommended mapping documented by the IETF document
* draft-szigeti-tsvwg-ieee-802-11e-01.txt but we keep the mapping to maintain
* binary compatibility. Applications should use the network service type socket
* option instead to select L2 QoS marking instead of IP_TOS or IPV6_TCLASS.
*/
static const struct dcsp_msc_map default_dscp_to_wifi_ac_map[] = {
{ .dscp = _DSCP_DF, .msc = MBUF_SC_BE }, /* RFC 2474 Standard */
{ .dscp = 1, .msc = MBUF_SC_BE }, /* */
{ .dscp = 2, .msc = MBUF_SC_BE }, /* */
{ .dscp = 3, .msc = MBUF_SC_BE }, /* */
{ .dscp = 4, .msc = MBUF_SC_BE }, /* */
{ .dscp = 5, .msc = MBUF_SC_BE }, /* */
{ .dscp = 6, .msc = MBUF_SC_BE }, /* */
{ .dscp = 7, .msc = MBUF_SC_BE }, /* */
{ .dscp = _DSCP_CS1, .msc = MBUF_SC_BK }, /* RFC 3662 Low-Priority Data */
{ .dscp = 9, .msc = MBUF_SC_BK }, /* */
{ .dscp = _DSCP_AF11, .msc = MBUF_SC_BK }, /* RFC 2597 High-Throughput Data */
{ .dscp = 11, .msc = MBUF_SC_BK }, /* */
{ .dscp = _DSCP_AF12, .msc = MBUF_SC_BK }, /* RFC 2597 High-Throughput Data */
{ .dscp = 13, .msc = MBUF_SC_BK }, /* */
{ .dscp = _DSCP_AF13, .msc = MBUF_SC_BK }, /* RFC 2597 High-Throughput Data */
{ .dscp = 15, .msc = MBUF_SC_BK }, /* */
{ .dscp = _DSCP_CS2, .msc = MBUF_SC_BK }, /* RFC 4594 OAM */
{ .dscp = 17, .msc = MBUF_SC_BK }, /* */
{ .dscp = _DSCP_AF21, .msc = MBUF_SC_BK }, /* RFC 2597 Low-Latency Data */
{ .dscp = 19, .msc = MBUF_SC_BK }, /* */
{ .dscp = _DSCP_AF22, .msc = MBUF_SC_BK }, /* RFC 2597 Low-Latency Data */
{ .dscp = 21, .msc = MBUF_SC_BK }, /* */
{ .dscp = _DSCP_AF23, .msc = MBUF_SC_BK }, /* RFC 2597 Low-Latency Data */
{ .dscp = 23, .msc = MBUF_SC_BK }, /* */
{ .dscp = _DSCP_CS3, .msc = MBUF_SC_BE }, /* RFC 2474 Broadcast Video */
{ .dscp = 25, .msc = MBUF_SC_BE }, /* */
{ .dscp = _DSCP_AF31, .msc = MBUF_SC_BE }, /* RFC 2597 Multimedia Streaming */
{ .dscp = 27, .msc = MBUF_SC_BE }, /* */
{ .dscp = _DSCP_AF32, .msc = MBUF_SC_BE }, /* RFC 2597 Multimedia Streaming */
{ .dscp = 29, .msc = MBUF_SC_BE }, /* */
{ .dscp = _DSCP_AF33, .msc = MBUF_SC_BE }, /* RFC 2597 Multimedia Streaming */
{ .dscp = 31, .msc = MBUF_SC_BE }, /* */
{ .dscp = _DSCP_CS4, .msc = MBUF_SC_VI }, /* RFC 2474 Real-Time Interactive */
{ .dscp = 33, .msc = MBUF_SC_VI }, /* */
{ .dscp = _DSCP_AF41, .msc = MBUF_SC_VI }, /* RFC 2597 Multimedia Conferencing */
{ .dscp = 35, .msc = MBUF_SC_VI }, /* */
{ .dscp = _DSCP_AF42, .msc = MBUF_SC_VI }, /* RFC 2597 Multimedia Conferencing */
{ .dscp = 37, .msc = MBUF_SC_VI }, /* */
{ .dscp = _DSCP_AF43, .msc = MBUF_SC_VI }, /* RFC 2597 Multimedia Conferencing */
{ .dscp = 39, .msc = MBUF_SC_VI }, /* */
{ .dscp = _DSCP_CS5, .msc = MBUF_SC_VI }, /* RFC 2474 Signaling */
{ .dscp = 41, .msc = MBUF_SC_VI }, /* */
{ .dscp = 42, .msc = MBUF_SC_VI }, /* */
{ .dscp = 43, .msc = MBUF_SC_VI }, /* */
{ .dscp = _DSCP_VA, .msc = MBUF_SC_VI }, /* RFC 5865 VOICE-ADMIT */
{ .dscp = 45, .msc = MBUF_SC_VI }, /* */
{ .dscp = _DSCP_EF, .msc = MBUF_SC_VI }, /* RFC 3246 Telephony */
{ .dscp = 47, .msc = MBUF_SC_VI }, /* */
{ .dscp = _DSCP_CS6, .msc = MBUF_SC_VO }, /* Wi-Fi WMM Certification: Chariot */
{ .dscp = 49, .msc = MBUF_SC_VO }, /* */
{ .dscp = 50, .msc = MBUF_SC_VO }, /* */
{ .dscp = 51, .msc = MBUF_SC_VO }, /* */
{ .dscp = 52, .msc = MBUF_SC_VO }, /* Wi-Fi WMM Certification: Sigma */
{ .dscp = 53, .msc = MBUF_SC_VO }, /* */
{ .dscp = 54, .msc = MBUF_SC_VO }, /* */
{ .dscp = 55, .msc = MBUF_SC_VO }, /* */
{ .dscp = _DSCP_CS7, .msc = MBUF_SC_VO }, /* Wi-Fi WMM Certification: Chariot */
{ .dscp = 57, .msc = MBUF_SC_VO }, /* */
{ .dscp = 58, .msc = MBUF_SC_VO }, /* */
{ .dscp = 59, .msc = MBUF_SC_VO }, /* */
{ .dscp = 60, .msc = MBUF_SC_VO }, /* */
{ .dscp = 61, .msc = MBUF_SC_VO }, /* */
{ .dscp = 62, .msc = MBUF_SC_VO }, /* */
{ .dscp = 63, .msc = MBUF_SC_VO }, /* */
{ .dscp = 255, .msc = MBUF_SC_UNSPEC } /* invalid DSCP to mark last entry */
};
mbuf_svc_class_t wifi_dscp_to_msc_array[DSCP_ARRAY_SIZE];
/*
* If there is no foreground activity on the interface for bg_switch_time
* seconds, the background connections can switch to foreground TCP
* congestion control.
*/
#define TCP_BG_SWITCH_TIME 2 /* seconds */
#if (DEVELOPMENT || DEBUG)
static int tfp_count = 0;
static TAILQ_HEAD(, tclass_for_proc) tfp_head =
TAILQ_HEAD_INITIALIZER(tfp_head);
struct tclass_for_proc {
TAILQ_ENTRY(tclass_for_proc) tfp_link;
int tfp_class;
pid_t tfp_pid;
char tfp_pname[(2 * MAXCOMLEN) + 1];
uint32_t tfp_qos_mode;
};
static int get_pid_tclass(struct so_tcdbg *);
static int get_pname_tclass(struct so_tcdbg *);
static int set_pid_tclass(struct so_tcdbg *);
static int set_pname_tclass(struct so_tcdbg *);
static int flush_pid_tclass(struct so_tcdbg *);
static int purge_tclass_for_proc(void);
static int flush_tclass_for_proc(void);
static void set_tclass_for_curr_proc(struct socket *);
/*
* Must be called with tclass_lock held
*/
static struct tclass_for_proc *
find_tfp_by_pid(pid_t pid)
{
struct tclass_for_proc *tfp;
TAILQ_FOREACH(tfp, &tfp_head, tfp_link) {
if (tfp->tfp_pid == pid) {
break;
}
}
return tfp;
}
/*
* Must be called with tclass_lock held
*/
static struct tclass_for_proc *
find_tfp_by_pname(const char *pname)
{
struct tclass_for_proc *tfp;
TAILQ_FOREACH(tfp, &tfp_head, tfp_link) {
if (strncmp(pname, tfp->tfp_pname,
sizeof(tfp->tfp_pname)) == 0) {
break;
}
}
return tfp;
}
__private_extern__ void
set_tclass_for_curr_proc(struct socket *so)
{
struct tclass_for_proc *tfp = NULL;
proc_t p = current_proc(); /* Not ref counted */
pid_t pid = proc_pid(p);
char *pname = proc_best_name(p);
lck_mtx_lock(&tclass_lock);
TAILQ_FOREACH(tfp, &tfp_head, tfp_link) {
if ((tfp->tfp_pid == pid) || (tfp->tfp_pid == -1 &&
strncmp(pname, tfp->tfp_pname,
sizeof(tfp->tfp_pname)) == 0)) {
if (tfp->tfp_class != SO_TC_UNSPEC) {
so->so_traffic_class = (uint16_t)tfp->tfp_class;
}
if (tfp->tfp_qos_mode == QOS_MODE_MARKING_POLICY_ENABLE) {
so->so_flags1 |= SOF1_QOSMARKING_ALLOWED;
} else if (tfp->tfp_qos_mode == QOS_MODE_MARKING_POLICY_DISABLE) {
so->so_flags1 &= ~SOF1_QOSMARKING_ALLOWED;
}
break;
}
}
lck_mtx_unlock(&tclass_lock);
}
/*
* Purge entries with PIDs of exited processes
*/
int
purge_tclass_for_proc(void)
{
int error = 0;
struct tclass_for_proc *tfp, *tvar;
lck_mtx_lock(&tclass_lock);
TAILQ_FOREACH_SAFE(tfp, &tfp_head, tfp_link, tvar) {
proc_t p;
if (tfp->tfp_pid == -1) {
continue;
}
if ((p = proc_find(tfp->tfp_pid)) == NULL) {
tfp_count--;
TAILQ_REMOVE(&tfp_head, tfp, tfp_link);
kfree_type(struct tclass_for_proc, tfp);
} else {
proc_rele(p);
}
}
lck_mtx_unlock(&tclass_lock);
return error;
}
/*
* Remove one entry
* Must be called with tclass_lock held
*/
static void
free_tclass_for_proc(struct tclass_for_proc *tfp)
{
if (tfp == NULL) {
return;
}
tfp_count--;
TAILQ_REMOVE(&tfp_head, tfp, tfp_link);
kfree_type(struct tclass_for_proc, tfp);
}
/*
* Remove all entries
*/
int
flush_tclass_for_proc(void)
{
int error = 0;
struct tclass_for_proc *tfp, *tvar;
lck_mtx_lock(&tclass_lock);
TAILQ_FOREACH_SAFE(tfp, &tfp_head, tfp_link, tvar) {
free_tclass_for_proc(tfp);
}
lck_mtx_unlock(&tclass_lock);
return error;
}
/*
* Must be called with tclass_lock held
*/
static struct tclass_for_proc *
alloc_tclass_for_proc(pid_t pid, const char *pname)
{
struct tclass_for_proc *tfp;
if (pid == -1 && pname == NULL) {
return NULL;
}
tfp = kalloc_type(struct tclass_for_proc, Z_NOWAIT | Z_ZERO);
if (tfp == NULL) {
return NULL;
}
tfp->tfp_pid = pid;
/*
* Add per pid entries before per proc name so we can find
* a specific instance of a process before the general name base entry.
*/
if (pid != -1) {
TAILQ_INSERT_HEAD(&tfp_head, tfp, tfp_link);
} else {
strlcpy(tfp->tfp_pname, pname, sizeof(tfp->tfp_pname));
TAILQ_INSERT_TAIL(&tfp_head, tfp, tfp_link);
}
tfp_count++;
return tfp;
}
/*
* SO_TC_UNSPEC for tclass means to remove the entry
*/
int
set_pid_tclass(struct so_tcdbg *so_tcdbg)
{
int error = EINVAL;
proc_t p = NULL;
struct tclass_for_proc *tfp;
pid_t pid = so_tcdbg->so_tcdbg_pid;
int tclass = so_tcdbg->so_tcdbg_tclass;
int netsvctype = so_tcdbg->so_tcdbg_netsvctype;
uint8_t ecn_val = so_tcdbg->so_tcdbg_ecn_val;
p = proc_find(pid);
if (p == NULL) {
printf("%s proc_find(%d) failed\n", __func__, pid);
goto done;
}
/* Need a tfp */
lck_mtx_lock(&tclass_lock);
tfp = find_tfp_by_pid(pid);
if (tfp == NULL) {
tfp = alloc_tclass_for_proc(pid, NULL);
if (tfp == NULL) {
lck_mtx_unlock(&tclass_lock);
error = ENOBUFS;
goto done;
}
}
tfp->tfp_class = tclass;
tfp->tfp_qos_mode = so_tcdbg->so_tcbbg_qos_mode;
lck_mtx_unlock(&tclass_lock);
if (tfp != NULL) {
struct fileproc *fp;
proc_fdlock(p);
fdt_foreach(fp, p) {
struct socket *so;
if (FILEGLOB_DTYPE(fp->fp_glob) != DTYPE_SOCKET) {
continue;
}
so = (struct socket *)fp_get_data(fp);
if (SOCK_DOM(so) != PF_INET && SOCK_DOM(so) != PF_INET6) {
continue;
}
socket_lock(so, 1);
if (tfp->tfp_qos_mode == QOS_MODE_MARKING_POLICY_ENABLE) {
so->so_flags1 |= SOF1_QOSMARKING_ALLOWED;
} else if (tfp->tfp_qos_mode == QOS_MODE_MARKING_POLICY_DISABLE) {
so->so_flags1 &= ~SOF1_QOSMARKING_ALLOWED;
}
struct inpcb *inp = so ? sotoinpcb(so) : NULL;
struct tcpcb *tp = inp ? intotcpcb(inp) : NULL;
if (tp != NULL) {
if (ecn_val == IPTOS_ECN_ECT1 || ecn_val == IPTOS_ECN_ECT0) {
tp->ecn_flags |= (ecn_val == IPTOS_ECN_ECT1) ?
TE_FORCE_ECT1 : TE_FORCE_ECT0;
} else {
tp->ecn_flags &= ~(TE_FORCE_ECT1 | TE_FORCE_ECT0);
}
}
socket_unlock(so, 1);
if (netsvctype != _NET_SERVICE_TYPE_UNSPEC) {
error = sock_setsockopt(so, SOL_SOCKET,
SO_NET_SERVICE_TYPE, &netsvctype, sizeof(int));
}
if (tclass != SO_TC_UNSPEC) {
error = sock_setsockopt(so, SOL_SOCKET,
SO_TRAFFIC_CLASS, &tclass, sizeof(int));
}
}
proc_fdunlock(p);
}
error = 0;
done:
if (p != NULL) {
proc_rele(p);
}
return error;
}
int
set_pname_tclass(struct so_tcdbg *so_tcdbg)
{
int error = EINVAL;
struct tclass_for_proc *tfp;
lck_mtx_lock(&tclass_lock);
tfp = find_tfp_by_pname(so_tcdbg->so_tcdbg_pname);
if (tfp == NULL) {
tfp = alloc_tclass_for_proc(-1, so_tcdbg->so_tcdbg_pname);
if (tfp == NULL) {
lck_mtx_unlock(&tclass_lock);
error = ENOBUFS;
goto done;
}
}
tfp->tfp_class = so_tcdbg->so_tcdbg_tclass;
tfp->tfp_qos_mode = so_tcdbg->so_tcbbg_qos_mode;
lck_mtx_unlock(&tclass_lock);
error = 0;
done:
return error;
}
static int
flush_pid_tclass(struct so_tcdbg *so_tcdbg)
{
pid_t pid = so_tcdbg->so_tcdbg_pid;
int tclass = so_tcdbg->so_tcdbg_tclass;
struct fileproc *fp;
proc_t p;
int error;
p = proc_find(pid);
if (p == PROC_NULL) {
printf("%s proc_find(%d) failed\n", __func__, pid);
return EINVAL;
}
proc_fdlock(p);
fdt_foreach(fp, p) {
struct socket *so;
if (FILEGLOB_DTYPE(fp->fp_glob) != DTYPE_SOCKET) {
continue;
}
so = (struct socket *)fp_get_data(fp);
error = sock_setsockopt(so, SOL_SOCKET, SO_FLUSH, &tclass,
sizeof(tclass));
if (error != 0) {
printf("%s: setsockopt(SO_FLUSH) (so=0x%llx, fd=%d, "
"tclass=%d) failed %d\n", __func__,
(uint64_t)VM_KERNEL_ADDRPERM(so), fdt_foreach_fd(), tclass,
error);
}
}
proc_fdunlock(p);
proc_rele(p);
return 0;
}
int
get_pid_tclass(struct so_tcdbg *so_tcdbg)
{
int error = EINVAL;
proc_t p = NULL;
struct tclass_for_proc *tfp;
pid_t pid = so_tcdbg->so_tcdbg_pid;
so_tcdbg->so_tcdbg_tclass = SO_TC_UNSPEC; /* Means not set */
p = proc_find(pid);
if (p == NULL) {
printf("%s proc_find(%d) failed\n", __func__, pid);
goto done;
}
/* Need a tfp */
lck_mtx_lock(&tclass_lock);
tfp = find_tfp_by_pid(pid);
if (tfp != NULL) {
so_tcdbg->so_tcdbg_tclass = tfp->tfp_class;
so_tcdbg->so_tcbbg_qos_mode = tfp->tfp_qos_mode;
error = 0;
}
lck_mtx_unlock(&tclass_lock);
done:
if (p != NULL) {
proc_rele(p);
}
return error;
}
int
get_pname_tclass(struct so_tcdbg *so_tcdbg)
{
int error = EINVAL;
struct tclass_for_proc *tfp;
so_tcdbg->so_tcdbg_tclass = SO_TC_UNSPEC; /* Means not set */
/* Need a tfp */
lck_mtx_lock(&tclass_lock);
tfp = find_tfp_by_pname(so_tcdbg->so_tcdbg_pname);
if (tfp != NULL) {
so_tcdbg->so_tcdbg_tclass = tfp->tfp_class;
so_tcdbg->so_tcbbg_qos_mode = tfp->tfp_qos_mode;
error = 0;
}
lck_mtx_unlock(&tclass_lock);
return error;
}
static int
delete_tclass_for_pid_pname(struct so_tcdbg *so_tcdbg)
{
int error = EINVAL;
pid_t pid = so_tcdbg->so_tcdbg_pid;
struct tclass_for_proc *tfp = NULL;
lck_mtx_lock(&tclass_lock);
if (pid != -1) {
tfp = find_tfp_by_pid(pid);
} else {
tfp = find_tfp_by_pname(so_tcdbg->so_tcdbg_pname);
}
if (tfp != NULL) {
free_tclass_for_proc(tfp);
error = 0;
}
lck_mtx_unlock(&tclass_lock);
return error;
}
/*
* Setting options requires privileges
*/
__private_extern__ int
so_set_tcdbg(struct socket *so, struct so_tcdbg *so_tcdbg)
{
int error = 0;
if ((so->so_state & SS_PRIV) == 0) {
return EPERM;
}
socket_unlock(so, 0);
switch (so_tcdbg->so_tcdbg_cmd) {
case SO_TCDBG_PID:
error = set_pid_tclass(so_tcdbg);
break;
case SO_TCDBG_PNAME:
error = set_pname_tclass(so_tcdbg);
break;
case SO_TCDBG_PURGE:
error = purge_tclass_for_proc();
break;
case SO_TCDBG_FLUSH:
error = flush_tclass_for_proc();
break;
case SO_TCDBG_DELETE:
error = delete_tclass_for_pid_pname(so_tcdbg);
break;
case SO_TCDBG_TCFLUSH_PID:
error = flush_pid_tclass(so_tcdbg);
break;
default:
error = EINVAL;
break;
}
socket_lock(so, 0);
return error;
}
/*
* Not required to be privileged to get
*/
__private_extern__ int
sogetopt_tcdbg(struct socket *so, struct sockopt *sopt)
{
int error = 0;
struct so_tcdbg so_tcdbg;
void *buf = NULL;
size_t len = sopt->sopt_valsize;
error = sooptcopyin(sopt, &so_tcdbg, sizeof(struct so_tcdbg),
sizeof(struct so_tcdbg));
if (error != 0) {
return error;
}
sopt->sopt_valsize = len;
socket_unlock(so, 0);
switch (so_tcdbg.so_tcdbg_cmd) {
case SO_TCDBG_PID:
error = get_pid_tclass(&so_tcdbg);
break;
case SO_TCDBG_PNAME:
error = get_pname_tclass(&so_tcdbg);
break;
case SO_TCDBG_COUNT:
lck_mtx_lock(&tclass_lock);
so_tcdbg.so_tcdbg_count = tfp_count;
lck_mtx_unlock(&tclass_lock);
break;
case SO_TCDBG_LIST: {
struct tclass_for_proc *tfp;
int n, alloc_count;
struct so_tcdbg *ptr;
lck_mtx_lock(&tclass_lock);
if ((alloc_count = tfp_count) == 0) {
lck_mtx_unlock(&tclass_lock);
error = EINVAL;
break;
}
len = alloc_count * sizeof(struct so_tcdbg);
lck_mtx_unlock(&tclass_lock);
buf = kalloc_data(len, Z_WAITOK | Z_ZERO);
if (buf == NULL) {
error = ENOBUFS;
break;
}
lck_mtx_lock(&tclass_lock);
n = 0;
ptr = (struct so_tcdbg *)buf;
TAILQ_FOREACH(tfp, &tfp_head, tfp_link) {
if (++n > alloc_count) {
break;
}
if (tfp->tfp_pid != -1) {
ptr->so_tcdbg_cmd = SO_TCDBG_PID;
ptr->so_tcdbg_pid = tfp->tfp_pid;
} else {
ptr->so_tcdbg_cmd = SO_TCDBG_PNAME;
ptr->so_tcdbg_pid = -1;
strlcpy(ptr->so_tcdbg_pname,
tfp->tfp_pname,
sizeof(ptr->so_tcdbg_pname));
}
ptr->so_tcdbg_tclass = tfp->tfp_class;
ptr->so_tcbbg_qos_mode = tfp->tfp_qos_mode;
ptr++;
}
lck_mtx_unlock(&tclass_lock);
}
break;
default:
error = EINVAL;
break;
}
socket_lock(so, 0);
if (error == 0) {
if (buf == NULL) {
error = sooptcopyout(sopt, &so_tcdbg,
sizeof(struct so_tcdbg));
} else {
error = sooptcopyout(sopt, buf, len);
kfree_data(buf, len);
}
}
return error;
}
#endif /* (DEVELOPMENT || DEBUG) */
int
so_get_netsvc_marking_level(struct socket *so)
{
int marking_level = NETSVC_MRKNG_UNKNOWN;
struct ifnet *ifp = NULL;
switch (SOCK_DOM(so)) {
case PF_INET: {
struct inpcb *inp = sotoinpcb(so);
if (inp != NULL) {
ifp = inp->inp_last_outifp;
}
break;
}
case PF_INET6: {
struct in6pcb *in6p = sotoin6pcb(so);
if (in6p != NULL) {
ifp = in6p->in6p_last_outifp;
}
break;
}
default:
break;
}
if (ifp != NULL) {
if ((ifp->if_eflags & IFEF_QOSMARKING_ENABLED) != 0) {
if ((so->so_flags1 & SOF1_QOSMARKING_ALLOWED)) {
marking_level = NETSVC_MRKNG_LVL_L3L2_ALL;
} else {
marking_level = NETSVC_MRKNG_LVL_L3L2_BK;
}
} else {
marking_level = NETSVC_MRKNG_LVL_L2;
}
}
return marking_level;
}
__private_extern__ int
so_set_traffic_class(struct socket *so, int optval)
{
int error = 0;
if (optval < SO_TC_BE || optval > SO_TC_CTL) {
error = EINVAL;
} else {
switch (optval) {
case _SO_TC_BK:
optval = SO_TC_BK;
break;
case _SO_TC_VI:
optval = SO_TC_VI;
break;
case _SO_TC_VO:
optval = SO_TC_VO;
break;
default:
if (!SO_VALID_TC(optval)) {
error = EINVAL;
}
break;
}
if (error == 0) {
int oldval = so->so_traffic_class;
VERIFY(SO_VALID_TC(optval));
so->so_traffic_class = (uint16_t)optval;
if ((SOCK_DOM(so) == PF_INET ||
SOCK_DOM(so) == PF_INET6) &&
SOCK_TYPE(so) == SOCK_STREAM) {
set_tcp_stream_priority(so);
}
if ((SOCK_DOM(so) == PF_INET ||
SOCK_DOM(so) == PF_INET6) &&
optval != oldval && (optval == SO_TC_BK_SYS ||
oldval == SO_TC_BK_SYS)) {
/*
* If the app switches from BK_SYS to something
* else, resume the socket if it was suspended.
*/
if (oldval == SO_TC_BK_SYS) {
inp_reset_fc_state(so->so_pcb);
}
SOTHROTTLELOG("throttle[%d]: so 0x%llx "
"[%d,%d] opportunistic %s\n", so->last_pid,
(uint64_t)VM_KERNEL_ADDRPERM(so),
SOCK_DOM(so), SOCK_TYPE(so),
(optval == SO_TC_BK_SYS) ? "ON" : "OFF");
}
}
}
return error;
}
__private_extern__ int
so_set_net_service_type(struct socket *so, int netsvctype)
{
int sotc;
int error;
if (!IS_VALID_NET_SERVICE_TYPE(netsvctype)) {
return EINVAL;
}
sotc = sotc_by_netservicetype[netsvctype];
error = so_set_traffic_class(so, sotc);
if (error != 0) {
return error;
}
so->so_netsvctype = (int8_t)netsvctype;
so->so_flags1 |= SOF1_TC_NET_SERV_TYPE;
return 0;
}
__private_extern__ void
so_set_default_traffic_class(struct socket *so)
{
so->so_traffic_class = SO_TC_BE;
if ((SOCK_DOM(so) == PF_INET || SOCK_DOM(so) == PF_INET6)) {
if (net_qos_policy_restricted == 0) {
so->so_flags1 |= SOF1_QOSMARKING_ALLOWED;
}
#if (DEVELOPMENT || DEBUG)
if (tfp_count > 0) {
set_tclass_for_curr_proc(so);
}
#endif /* (DEVELOPMENT || DEBUG) */
}
}
__private_extern__ int
so_set_opportunistic(struct socket *so, int optval)
{
return so_set_traffic_class(so, (optval == 0) ?
SO_TC_BE : SO_TC_BK_SYS);
}
__private_extern__ int
so_get_opportunistic(struct socket *so)
{
return so->so_traffic_class == SO_TC_BK_SYS;
}
__private_extern__ int
so_tc_from_control(struct mbuf *control, int *out_netsvctype)
{
struct cmsghdr *cm;
int sotc = SO_TC_UNSPEC;
*out_netsvctype = _NET_SERVICE_TYPE_UNSPEC;
for (cm = M_FIRST_CMSGHDR(control);
is_cmsg_valid(control, cm);
cm = M_NXT_CMSGHDR(control, cm)) {
int val;
if (cm->cmsg_level != SOL_SOCKET ||
cm->cmsg_len != CMSG_LEN(sizeof(int))) {
continue;
}
val = *(int *)(void *)CMSG_DATA(cm);
/*
* The first valid option wins
*/
switch (cm->cmsg_type) {
case SO_TRAFFIC_CLASS:
if (SO_VALID_TC(val)) {
sotc = val;
return sotc;
/* NOT REACHED */
} else if (val < SO_TC_NET_SERVICE_OFFSET) {
break;
}
/*
* Handle the case SO_NET_SERVICE_TYPE values are
* passed using SO_TRAFFIC_CLASS
*/
val = val - SO_TC_NET_SERVICE_OFFSET;
OS_FALLTHROUGH;
case SO_NET_SERVICE_TYPE:
if (!IS_VALID_NET_SERVICE_TYPE(val)) {
break;
}
*out_netsvctype = val;
sotc = sotc_by_netservicetype[val];
return sotc;
/* NOT REACHED */
default:
break;
}
}
return sotc;
}
__private_extern__ int
so_tos_from_control(struct mbuf *control)
{
struct cmsghdr *cm;
int tos = IPTOS_UNSPEC;
for (cm = M_FIRST_CMSGHDR(control);
is_cmsg_valid(control, cm);
cm = M_NXT_CMSGHDR(control, cm)) {
if (cm->cmsg_len != CMSG_LEN(sizeof(int))) {
continue;
}
if ((cm->cmsg_level == IPPROTO_IP &&
cm->cmsg_type == IP_TOS) ||
(cm->cmsg_level == IPPROTO_IPV6 &&
cm->cmsg_type == IPV6_TCLASS)) {
tos = *(int *)(void *)CMSG_DATA(cm) & IPTOS_MASK;
/* The first valid option wins */
break;
}
}
return tos;
}
__private_extern__ void
so_recv_data_stat(struct socket *so, struct mbuf *m, size_t off)
{
uint32_t mtc = m_get_traffic_class(m);
if (mtc >= SO_TC_STATS_MAX) {
mtc = MBUF_TC_BE;
}
so->so_tc_stats[mtc].rxpackets += 1;
so->so_tc_stats[mtc].rxbytes +=
((m->m_flags & M_PKTHDR) ? m->m_pkthdr.len : 0) + off;
}
__private_extern__ void
so_inc_recv_data_stat(struct socket *so, size_t pkts, size_t bytes,
uint32_t mtc)
{
if (mtc >= SO_TC_STATS_MAX) {
mtc = MBUF_TC_BE;
}
so->so_tc_stats[mtc].rxpackets += pkts;
so->so_tc_stats[mtc].rxbytes += bytes;
}
static inline int
so_throttle_best_effort(struct socket *so, struct ifnet *ifp)
{
uint32_t uptime = (uint32_t)net_uptime();
return soissrcbesteffort(so) &&
net_io_policy_throttle_best_effort == 1 &&
ifp->if_rt_sendts > 0 &&
(int)(uptime - ifp->if_rt_sendts) <= TCP_BG_SWITCH_TIME;
}
__private_extern__ void
set_tcp_stream_priority(struct socket *so)
{
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp = intotcpcb(inp);
struct ifnet *outifp;
u_char old_cc = tp->tcp_cc_index;
int recvbg = IS_TCP_RECV_BG(so);
bool is_local = false, fg_active = false;
uint32_t uptime;
VERIFY((SOCK_CHECK_DOM(so, PF_INET) ||
SOCK_CHECK_DOM(so, PF_INET6)) &&
SOCK_CHECK_TYPE(so, SOCK_STREAM) &&
SOCK_CHECK_PROTO(so, IPPROTO_TCP));
/* Return if the socket is in a terminal state */
if (inp->inp_state == INPCB_STATE_DEAD) {
return;
}
outifp = inp->inp_last_outifp;
uptime = (uint32_t)net_uptime();
/*
* If the socket was marked as a background socket or if the
* traffic class is set to background with traffic class socket
* option then make both send and recv side of the stream to be
* background. The variable sotcdb which can be set with sysctl
* is used to disable these settings for testing.
*/
if (outifp == NULL || (outifp->if_flags & IFF_LOOPBACK)) {
is_local = true;
}
/* Check if there has been recent foreground activity */
if (outifp != NULL) {
/*
* If the traffic source is background, check if
* there is recent foreground activity which should
* continue to keep the traffic source as background.
* Otherwise, we can switch the traffic source to
* foreground.
*/
if (soissrcbackground(so) && outifp->if_fg_sendts > 0 &&
(int)(uptime - outifp->if_fg_sendts) <= TCP_BG_SWITCH_TIME) {
fg_active = true;
}
/*
* The traffic source is best-effort -- check if
* the policy to throttle best effort is enabled
* and there was realtime activity on this
* interface recently. If this is true, enable
* algorithms that respond to increased latency
* on best-effort traffic.
*/
if (so_throttle_best_effort(so, outifp)) {
fg_active = true;
}
}
/*
* System initiated background traffic like cloud uploads should
* always use background delay sensitive algorithms. This will
* make the stream more responsive to other streams on the user's
* network and it will minimize latency induced.
*/
if (fg_active || IS_SO_TC_BACKGROUNDSYSTEM(so->so_traffic_class)) {
/*
* If the interface that the connection is using is
* loopback, do not use background congestion
* control algorithm.
*
* If there has been recent foreground activity or if there
* was an indication that a real time foreground application
* is going to use networking (net_io_policy_throttled),
* switch the background and best effort streams to use background
* congestion control algorithm.
*/
if ((sotcdb & SOTCDB_NO_SENDTCPBG) != 0 || is_local) {
if (old_cc == TCP_CC_ALGO_BACKGROUND_INDEX) {
tcp_set_foreground_cc(so);
}
} else {
if (old_cc != TCP_CC_ALGO_BACKGROUND_INDEX) {
tcp_set_background_cc(so);
}
}
/* Set receive side background flags */
if ((sotcdb & SOTCDB_NO_RECVTCPBG) != 0 || is_local) {
tcp_clear_recv_bg(so);
} else {
tcp_set_recv_bg(so);
}
} else {
/*
* If there is no recent foreground activity, even the
* background flows can use foreground congestion controller.
*/
tcp_clear_recv_bg(so);
if (old_cc == TCP_CC_ALGO_BACKGROUND_INDEX) {
tcp_set_foreground_cc(so);
}
}
if (old_cc != tp->tcp_cc_index || recvbg != IS_TCP_RECV_BG(so)) {
SOTHROTTLELOG("throttle[%d]: so 0x%llx [%d,%d] TCP %s send; "
"%s recv\n", so->last_pid,
(uint64_t)VM_KERNEL_ADDRPERM(so),
SOCK_DOM(so), SOCK_TYPE(so),
(tp->tcp_cc_index == TCP_CC_ALGO_BACKGROUND_INDEX) ?
"background" : "foreground",
IS_TCP_RECV_BG(so) ? "background" : "foreground");
}
}
/*
* Set traffic class to an IPv4 or IPv6 packet
* - mark the mbuf
* - set the DSCP code following the WMM mapping
*/
__private_extern__ void
set_packet_service_class(struct mbuf *m, struct socket *so,
int sotc, uint32_t flags)
{
mbuf_svc_class_t msc = MBUF_SC_BE; /* Best effort by default */
struct inpcb *inp = sotoinpcb(so); /* in6pcb and inpcb are the same */
if (!(m->m_flags & M_PKTHDR)) {
return;
}
/*
* Here is the precedence:
* 1) TRAFFIC_MGT_SO_BACKGROUND trumps all
* 2) Traffic class passed via ancillary data to sendmsdg(2)
* 3) Traffic class socket option last
*/
if (sotc != SO_TC_UNSPEC) {
VERIFY(SO_VALID_TC(sotc));
msc = so_tc2msc(sotc);
/* Assert because tc must have been valid */
VERIFY(MBUF_VALID_SC(msc));
}
/*
* If TRAFFIC_MGT_SO_BACKGROUND is set or policy to throttle
* best effort is set, depress the priority.
*/
if (!IS_MBUF_SC_BACKGROUND(msc) && soisthrottled(so)) {
msc = MBUF_SC_BK;
}
if (IS_MBUF_SC_BESTEFFORT(msc) && inp->inp_last_outifp != NULL &&
so_throttle_best_effort(so, inp->inp_last_outifp)) {
msc = MBUF_SC_BK;
}
if (soissrcbackground(so)) {
m->m_pkthdr.pkt_flags |= PKTF_SO_BACKGROUND;
}
if (soissrcrealtime(so) || IS_MBUF_SC_REALTIME(msc)) {
m->m_pkthdr.pkt_flags |= PKTF_SO_REALTIME;
}
/*
* Set the traffic class in the mbuf packet header svc field
*/
if (sotcdb & SOTCDB_NO_MTC) {
goto no_mbtc;
}
/*
* Elevate service class if the packet is a pure TCP ACK.
* We can do this only when the flow is not a background
* flow and the outgoing interface supports
* transmit-start model.
*/
if (!IS_MBUF_SC_BACKGROUND(msc) &&
(flags & (PKT_SCF_TCP_ACK | PKT_SCF_TCP_SYN)) != 0) {
msc = MBUF_SC_CTL;
}
(void) m_set_service_class(m, msc);
/*
* Set the privileged traffic auxiliary flag if applicable,
* or clear it.
*/
if (!(sotcdb & SOTCDB_NO_PRIVILEGED) && soisprivilegedtraffic(so) &&
msc != MBUF_SC_UNSPEC) {
m->m_pkthdr.pkt_flags |= PKTF_PRIO_PRIVILEGED;
} else {
m->m_pkthdr.pkt_flags &= ~PKTF_PRIO_PRIVILEGED;
}
no_mbtc:
/*
* For TCP with background traffic class switch CC algo based on sysctl
*/
if (so->so_type == SOCK_STREAM) {
set_tcp_stream_priority(so);
}
so_tc_update_stats(m, so, msc);
}
__private_extern__ void
so_tc_update_stats(struct mbuf *m, struct socket *so, mbuf_svc_class_t msc)
{
mbuf_traffic_class_t mtc;
/*
* Assume socket and mbuf traffic class values are the same
* Also assume the socket lock is held. Note that the stats
* at the socket layer are reduced down to the legacy traffic
* classes; we could/should potentially expand so_tc_stats[].
*/
mtc = MBUF_SC2TC(msc);
VERIFY(mtc < SO_TC_STATS_MAX);
so->so_tc_stats[mtc].txpackets += 1;
so->so_tc_stats[mtc].txbytes += m->m_pkthdr.len;
}
__private_extern__ mbuf_svc_class_t
so_tc2msc(int tc)
{
mbuf_svc_class_t msc;
switch (tc) {
case SO_TC_BK_SYS:
msc = MBUF_SC_BK_SYS;
break;
case SO_TC_BK:
case _SO_TC_BK:
msc = MBUF_SC_BK;
break;
case SO_TC_BE:
msc = MBUF_SC_BE;
break;
case SO_TC_RD:
msc = MBUF_SC_RD;
break;
case SO_TC_OAM:
msc = MBUF_SC_OAM;
break;
case SO_TC_AV:
msc = MBUF_SC_AV;
break;
case SO_TC_RV:
msc = MBUF_SC_RV;
break;
case SO_TC_VI:
case _SO_TC_VI:
msc = MBUF_SC_VI;
break;
case SO_TC_NETSVC_SIG:
msc = MBUF_SC_SIG;
break;
case SO_TC_VO:
case _SO_TC_VO:
msc = MBUF_SC_VO;
break;
case SO_TC_CTL:
msc = MBUF_SC_CTL;
break;
case SO_TC_ALL:
default:
msc = MBUF_SC_UNSPEC;
break;
}
return msc;
}
__private_extern__ int
so_svc2tc(mbuf_svc_class_t svc)
{
switch (svc) {
case MBUF_SC_BK_SYS:
return SO_TC_BK_SYS;
case MBUF_SC_BK:
return SO_TC_BK;
case MBUF_SC_BE:
return SO_TC_BE;
case MBUF_SC_RD:
return SO_TC_RD;
case MBUF_SC_OAM:
return SO_TC_OAM;
case MBUF_SC_AV:
return SO_TC_AV;
case MBUF_SC_RV:
return SO_TC_RV;
case MBUF_SC_VI:
return SO_TC_VI;
case MBUF_SC_SIG:
return SO_TC_NETSVC_SIG;
case MBUF_SC_VO:
return SO_TC_VO;
case MBUF_SC_CTL:
return SO_TC_CTL;
case MBUF_SC_UNSPEC:
default:
return SO_TC_BE;
}
}
static size_t
sotc_index(int sotc)
{
switch (sotc) {
case SO_TC_BK_SYS:
return SOTCIX_BK_SYS;
case _SO_TC_BK:
case SO_TC_BK:
return SOTCIX_BK;
case SO_TC_BE:
return SOTCIX_BE;
case SO_TC_RD:
return SOTCIX_RD;
case SO_TC_OAM:
return SOTCIX_OAM;
case SO_TC_AV:
return SOTCIX_AV;
case SO_TC_RV:
return SOTCIX_RV;
case _SO_TC_VI:
case SO_TC_VI:
return SOTCIX_VI;
case _SO_TC_VO:
case SO_TC_VO:
return SOTCIX_VO;
case SO_TC_CTL:
return SOTCIX_CTL;
default:
break;
}
/*
* Unknown traffic class value
*/
return SIZE_T_MAX;
}
uint8_t
fastlane_sc_to_dscp(uint32_t svc_class)
{
uint8_t dscp = _DSCP_DF;
switch (svc_class) {
case MBUF_SC_BK_SYS:
case MBUF_SC_BK:
dscp = _DSCP_AF11;
break;
case MBUF_SC_BE:
dscp = _DSCP_DF;
break;
case MBUF_SC_RD:
dscp = _DSCP_AF21;
break;
case MBUF_SC_OAM:
dscp = _DSCP_CS2;
break;
case MBUF_SC_AV:
dscp = _DSCP_AF31;
break;
case MBUF_SC_RV:
dscp = _DSCP_CS4;
break;
case MBUF_SC_VI:
dscp = _DSCP_AF41;
break;
case MBUF_SC_SIG:
dscp = _DSCP_CS3;
break;
case MBUF_SC_VO:
dscp = _DSCP_EF;
break;
case MBUF_SC_CTL:
dscp = _DSCP_DF;
break;
default:
dscp = _DSCP_DF;
break;
}
return dscp;
}
uint8_t
rfc4594_sc_to_dscp(uint32_t svc_class)
{
uint8_t dscp = _DSCP_DF;
switch (svc_class) {
case MBUF_SC_BK_SYS: /* Low-Priority Data */
case MBUF_SC_BK:
dscp = _DSCP_CS1;
break;
case MBUF_SC_BE: /* Standard */
dscp = _DSCP_DF;
break;
case MBUF_SC_RD: /* Low-Latency Data */
dscp = _DSCP_AF21;
break;
/* SVC_CLASS Not Defined: High-Throughput Data */
case MBUF_SC_OAM: /* OAM */
dscp = _DSCP_CS2;
break;
/* SVC_CLASS Not Defined: Broadcast Video */
case MBUF_SC_AV: /* Multimedia Streaming */
dscp = _DSCP_AF31;
break;
case MBUF_SC_RV: /* Real-Time Interactive */
dscp = _DSCP_CS4;
break;
case MBUF_SC_VI: /* Multimedia Conferencing */
dscp = _DSCP_AF41;
break;
case MBUF_SC_SIG: /* Signaling */
dscp = _DSCP_CS5;
break;
case MBUF_SC_VO: /* Telephony */
dscp = _DSCP_EF;
break;
case MBUF_SC_CTL: /* Network Control*/
dscp = _DSCP_CS6;
break;
default:
dscp = _DSCP_DF;
break;
}
return dscp;
}
mbuf_traffic_class_t
rfc4594_dscp_to_tc(uint8_t dscp)
{
mbuf_traffic_class_t tc = MBUF_TC_BE;
switch (dscp) {
case _DSCP_CS1:
tc = MBUF_TC_BK;
break;
case _DSCP_DF:
case _DSCP_AF21:
case _DSCP_CS2:
tc = MBUF_TC_BE;
break;
case _DSCP_AF31:
case _DSCP_CS4:
case _DSCP_AF41:
case _DSCP_CS5:
tc = MBUF_TC_VI;
break;
case _DSCP_EF:
case _DSCP_CS6:
tc = MBUF_TC_VO;
break;
default:
tc = MBUF_TC_BE;
break;
}
return tc;
}
/*
* Pass NULL ifp for default map
*/
static errno_t
set_netsvctype_dscp_map(struct net_qos_dscp_map *net_qos_dscp_map,
const struct netsvctype_dscp_map *netsvctype_dscp_map)
{
size_t i;
int netsvctype;
/*
* Do not accept more that max number of distinct DSCPs
*/
if (net_qos_dscp_map == NULL || netsvctype_dscp_map == NULL) {
return EINVAL;
}
/*
* Validate input parameters
*/
for (i = 0; i < _NET_SERVICE_TYPE_COUNT; i++) {
if (!IS_VALID_NET_SERVICE_TYPE(netsvctype_dscp_map[i].netsvctype)) {
return EINVAL;
}
if (netsvctype_dscp_map[i].dscp > _MAX_DSCP) {
return EINVAL;
}
}
for (i = 0; i < _NET_SERVICE_TYPE_COUNT; i++) {
netsvctype = netsvctype_dscp_map[i].netsvctype;
net_qos_dscp_map->netsvctype_to_dscp[netsvctype] =
netsvctype_dscp_map[i].dscp;
}
for (netsvctype = 0; netsvctype < _NET_SERVICE_TYPE_COUNT; netsvctype++) {
switch (netsvctype) {
case NET_SERVICE_TYPE_BE:
case NET_SERVICE_TYPE_BK:
case NET_SERVICE_TYPE_VI:
case NET_SERVICE_TYPE_VO:
case NET_SERVICE_TYPE_RV:
case NET_SERVICE_TYPE_AV:
case NET_SERVICE_TYPE_OAM:
case NET_SERVICE_TYPE_RD: {
size_t sotcix;
sotcix = sotc_index(sotc_by_netservicetype[netsvctype]);
if (sotcix != SIZE_T_MAX) {
net_qos_dscp_map->sotc_to_dscp[sotcix] =
netsvctype_dscp_map[netsvctype].dscp;
}
break;
}
case NET_SERVICE_TYPE_SIG:
/* Signaling does not have its own traffic class */
break;
default:
/* We should not be here */
ASSERT(0);
}
}
if (net_qos_dscp_map == &fastlane_net_qos_dscp_map) {
/* Network control socket traffic class is always best effort for fastlane*/
net_qos_dscp_map->sotc_to_dscp[SOTCIX_CTL] = _DSCP_DF;
} else {
net_qos_dscp_map->sotc_to_dscp[SOTCIX_CTL] = _DSCP_CS6;
}
/* Background system socket traffic class DSCP same as background */
net_qos_dscp_map->sotc_to_dscp[SOTCIX_BK_SYS] =
net_qos_dscp_map->sotc_to_dscp[SOTCIX_BK];
return 0;
}
static size_t
get_netsvctype_dscp_map(struct netsvctype_dscp_map *netsvctype_dscp_map)
{
struct net_qos_dscp_map *net_qos_dscp_map;
int i;
net_qos_dscp_map = &fastlane_net_qos_dscp_map;
for (i = 0; i < _NET_SERVICE_TYPE_COUNT; i++) {
netsvctype_dscp_map[i].netsvctype = i;
netsvctype_dscp_map[i].dscp = net_qos_dscp_map->netsvctype_to_dscp[i];
}
return i * sizeof(struct netsvctype_dscp_map);
}
void
net_qos_map_init()
{
errno_t error;
error = set_netsvctype_dscp_map(&fastlane_net_qos_dscp_map,
fastlane_netsvctype_dscp_map);
ASSERT(error == 0);
error = set_netsvctype_dscp_map(&rfc4594_net_qos_dscp_map,
rfc4594_netsvctype_dscp_map);
ASSERT(error == 0);
#if (DEBUG || DEVELOPMENT)
error = set_netsvctype_dscp_map(&custom_net_qos_dscp_map,
rfc4594_netsvctype_dscp_map);
ASSERT(error == 0);
#endif /* (DEBUG || DEVELOPMENT) */
set_dscp_to_wifi_ac_map(default_dscp_to_wifi_ac_map, 1);
}
int
sysctl_default_netsvctype_to_dscp_map SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg1, arg2)
int error = 0;
if (req->oldptr == USER_ADDR_NULL) {
req->oldidx =
_NET_SERVICE_TYPE_COUNT * sizeof(struct netsvctype_dscp_map);
} else if (req->oldlen > 0) {
struct netsvctype_dscp_map netsvctype_dscp_map[_NET_SERVICE_TYPE_COUNT] = {};
size_t len;
len = get_netsvctype_dscp_map(netsvctype_dscp_map);
error = SYSCTL_OUT(req, netsvctype_dscp_map,
MIN(len, req->oldlen));
if (error != 0) {
goto done;
}
}
if (req->newptr != USER_ADDR_NULL) {
error = EPERM;
}
done:
return error;
}
__private_extern__ errno_t
set_packet_qos(struct mbuf *m, struct ifnet *ifp, boolean_t qos_allowed,
int sotc, int netsvctype, uint8_t *dscp_inout)
{
if (ifp == NULL || dscp_inout == NULL) {
return EINVAL;
}
if ((ifp->if_eflags & IFEF_QOSMARKING_ENABLED) != 0 &&
ifp->if_qosmarking_mode != IFRTYPE_QOSMARKING_MODE_NONE) {
uint8_t dscp;
const struct net_qos_dscp_map *net_qos_dscp_map = NULL;
switch (ifp->if_qosmarking_mode) {
case IFRTYPE_QOSMARKING_FASTLANE:
net_qos_dscp_map = &fastlane_net_qos_dscp_map;
break;
case IFRTYPE_QOSMARKING_RFC4594:
net_qos_dscp_map = &rfc4594_net_qos_dscp_map;
break;
#if (DEBUG || DEVELOPMENT)
case IFRTYPE_QOSMARKING_CUSTOM:
net_qos_dscp_map = &custom_net_qos_dscp_map;
break;
#endif /* (DEBUG || DEVELOPMENT) */
default:
panic("invalid QoS marking type");
/* NOTREACHED */
}
/*
* When on a Fastlane network, IP_TOS/IPV6_TCLASS are no-ops
*/
dscp = _DSCP_DF;
/*
* For DSCP use the network service type is specified, otherwise
* use the socket traffic class
*
* When not whitelisted by the policy, set DSCP only for best
* effort and background, and set the mbuf service class to
* best effort as well so the packet will be queued and
* scheduled at a lower priority.
* We still want to prioritize control traffic on the interface
* so we do not change the mbuf service class for SO_TC_CTL
*/
if (IS_VALID_NET_SERVICE_TYPE(netsvctype) &&
netsvctype != NET_SERVICE_TYPE_BE) {
dscp = net_qos_dscp_map->netsvctype_to_dscp[netsvctype];
if (qos_allowed == FALSE &&
netsvctype != NET_SERVICE_TYPE_BE &&
netsvctype != NET_SERVICE_TYPE_BK) {
dscp = _DSCP_DF;
if (sotc != SO_TC_CTL) {
m_set_service_class(m, MBUF_SC_BE);
}
}
} else if (sotc != SO_TC_UNSPEC) {
size_t sotcix = sotc_index(sotc);
if (sotcix != SIZE_T_MAX) {
dscp = net_qos_dscp_map->sotc_to_dscp[sotcix];
if (qos_allowed == FALSE && sotc != SO_TC_BE &&
sotc != SO_TC_BK && sotc != SO_TC_BK_SYS &&
sotc != SO_TC_CTL) {
dscp = _DSCP_DF;
if (sotc != SO_TC_CTL) {
m_set_service_class(m, MBUF_SC_BE);
}
}
}
}
if (net_qos_verbose != 0) {
printf("%s qos_allowed %d sotc %u netsvctype %u dscp %u\n",
__func__, qos_allowed, sotc, netsvctype, dscp);
}
if (*dscp_inout != dscp) {
*dscp_inout = dscp;
}
} else if (*dscp_inout != _DSCP_DF && IFNET_IS_WIFI_INFRA(ifp)) {
mbuf_svc_class_t msc = m_get_service_class(m);
/*
* For WiFi infra, when the mbuf service class is best effort
* and the DSCP is not default, set the service class based
* on DSCP
*/
if (msc == MBUF_SC_BE) {
msc = wifi_dscp_to_msc_array[*dscp_inout];
if (msc != MBUF_SC_BE) {
m_set_service_class(m, msc);
if (net_qos_verbose != 0) {
printf("%s set msc %u for dscp %u\n",
__func__, msc, *dscp_inout);
}
}
}
}
return 0;
}
static void
set_dscp_to_wifi_ac_map(const struct dcsp_msc_map *map, int clear)
{
int i;
if (clear) {
bzero(wifi_dscp_to_msc_array, sizeof(wifi_dscp_to_msc_array));
}
for (i = 0; i < DSCP_ARRAY_SIZE; i++) {
const struct dcsp_msc_map *elem = map + i;
if (elem->dscp > _MAX_DSCP || elem->msc == MBUF_SC_UNSPEC) {
break;
}
switch (elem->msc) {
case MBUF_SC_BK_SYS:
case MBUF_SC_BK:
wifi_dscp_to_msc_array[elem->dscp] = MBUF_SC_BK;
break;
default:
case MBUF_SC_BE:
case MBUF_SC_RD:
case MBUF_SC_OAM:
wifi_dscp_to_msc_array[elem->dscp] = MBUF_SC_BE;
break;
case MBUF_SC_AV:
case MBUF_SC_RV:
case MBUF_SC_VI:
wifi_dscp_to_msc_array[elem->dscp] = MBUF_SC_VI;
break;
case MBUF_SC_VO:
case MBUF_SC_CTL:
wifi_dscp_to_msc_array[elem->dscp] = MBUF_SC_VO;
break;
}
}
}
static errno_t
dscp_msc_map_from_netsvctype_dscp_map(struct netsvctype_dscp_map *netsvctype_dscp_map,
size_t count, struct dcsp_msc_map *dcsp_msc_map)
{
errno_t error = 0;
uint32_t i;
/*
* Validate input parameters
*/
for (i = 0; i < count; i++) {
if (!SO_VALID_TC(netsvctype_dscp_map[i].netsvctype)) {
error = EINVAL;
goto done;
}
if (netsvctype_dscp_map[i].dscp > _MAX_DSCP) {
error = EINVAL;
goto done;
}
}
bzero(dcsp_msc_map, DSCP_ARRAY_SIZE * sizeof(struct dcsp_msc_map));
for (i = 0; i < count; i++) {
dcsp_msc_map[i].dscp = netsvctype_dscp_map[i].dscp;
dcsp_msc_map[i].msc = so_tc2msc(netsvctype_dscp_map[i].netsvctype);
}
done:
return error;
}
int
sysctl_dscp_to_wifi_ac_map SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg1, arg2)
int error = 0;
size_t len = DSCP_ARRAY_SIZE * sizeof(struct netsvctype_dscp_map);
struct netsvctype_dscp_map netsvctype_dscp_map[DSCP_ARRAY_SIZE] = {};
struct dcsp_msc_map dcsp_msc_map[DSCP_ARRAY_SIZE];
size_t count;
if (req->oldptr == USER_ADDR_NULL) {
req->oldidx = len;
} else if (req->oldlen > 0) {
uint8_t i;
for (i = 0; i < DSCP_ARRAY_SIZE; i++) {
netsvctype_dscp_map[i].dscp = i;
netsvctype_dscp_map[i].netsvctype =
so_svc2tc(wifi_dscp_to_msc_array[i]);
}
error = SYSCTL_OUT(req, netsvctype_dscp_map,
MIN(len, req->oldlen));
if (error != 0) {
goto done;
}
}
if (req->newptr == USER_ADDR_NULL) {
goto done;
}
error = proc_suser(current_proc());
if (error != 0) {
goto done;
}
/*
* Check input length
*/
if (req->newlen > len) {
error = EINVAL;
goto done;
}
/*
* Cap the number of entries to copy from input buffer
*/
if (len > req->newlen) {
len = req->newlen;
}
error = SYSCTL_IN(req, netsvctype_dscp_map, len);
if (error != 0) {
goto done;
}
count = len / sizeof(struct netsvctype_dscp_map);
bzero(dcsp_msc_map, sizeof(dcsp_msc_map));
error = dscp_msc_map_from_netsvctype_dscp_map(netsvctype_dscp_map, count,
dcsp_msc_map);
if (error != 0) {
goto done;
}
set_dscp_to_wifi_ac_map(dcsp_msc_map, 0);
done:
return error;
}
int
sysctl_reset_dscp_to_wifi_ac_map SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg1, arg2)
int error = 0;
int val = 0;
error = sysctl_handle_int(oidp, &val, 0, req);
if (error || !req->newptr) {
return error;
}
if (req->newptr == USER_ADDR_NULL) {
return 0;
}
error = proc_suser(current_proc());
if (error != 0) {
return error;
}
set_dscp_to_wifi_ac_map(default_dscp_to_wifi_ac_map, 1);
return 0;
}
/*
* Returns whether a large upload or download transfer should be marked as
* BK service type for network activity. This is a system level
* hint/suggestion to classify application traffic based on statistics
* collected from the current network attachment
*
* Returns 1 for BK and 0 for default
*/
int
net_qos_guideline(struct proc *p, struct net_qos_guideline_args *arg,
int *retval)
{
#pragma unused(p)
#define RETURN_USE_BK 1
#define RETURN_USE_DEFAULT 0
struct net_qos_param qos_arg;
struct ifnet *ipv4_primary, *ipv6_primary;
int err = 0;
if (arg->param == USER_ADDR_NULL || retval == NULL ||
arg->param_len != sizeof(qos_arg)) {
return EINVAL;
}
err = copyin(arg->param, (caddr_t) &qos_arg, sizeof(qos_arg));
if (err != 0) {
return err;
}
*retval = RETURN_USE_DEFAULT;
ipv4_primary = ifindex2ifnet[get_primary_ifscope(AF_INET)];
ipv6_primary = ifindex2ifnet[get_primary_ifscope(AF_INET6)];
/*
* If either of the interfaces is in Low Internet mode, enable
* background delay based algorithms on this transfer
*/
if (qos_arg.nq_uplink) {
if ((ipv4_primary != NULL &&
(ipv4_primary->if_xflags & IFXF_LOW_INTERNET_UL)) ||
(ipv6_primary != NULL &&
(ipv6_primary->if_xflags & IFXF_LOW_INTERNET_UL))) {
*retval = RETURN_USE_BK;
return 0;
}
} else {
if ((ipv4_primary != NULL &&
(ipv4_primary->if_xflags & IFXF_LOW_INTERNET_DL)) ||
(ipv6_primary != NULL &&
(ipv6_primary->if_xflags & IFXF_LOW_INTERNET_DL))) {
*retval = RETURN_USE_BK;
return 0;
}
}
/*
* Some times IPv4 and IPv6 primary interfaces can be different.
* In this case, if either of them is non-cellular, we should mark
* the transfer as BK as it can potentially get used based on
* the host name resolution
*/
if (ipv4_primary != NULL && IFNET_IS_EXPENSIVE(ipv4_primary) &&
ipv6_primary != NULL && IFNET_IS_EXPENSIVE(ipv6_primary)) {
if (qos_arg.nq_use_expensive) {
return 0;
} else {
*retval = RETURN_USE_BK;
return 0;
}
}
if (ipv4_primary != NULL && IFNET_IS_CONSTRAINED(ipv4_primary) &&
ipv6_primary != NULL && IFNET_IS_CONSTRAINED(ipv6_primary)) {
if (qos_arg.nq_use_constrained) {
return 0;
} else {
*retval = RETURN_USE_BK;
return 0;
}
}
if (qos_arg.nq_transfer_size >= 5 * 1024 * 1024) {
*retval = RETURN_USE_BK;
return 0;
}
#undef RETURN_USE_BK
#undef RETURN_USE_DEFAULT
return 0;
}
#if (DEBUG || DEVELOPMENT)
/*
* Customizable QoS mapping table
* By default it uses the mapping table for RFC 4594
*
* Notes:
* BK_SYS is the same as BK
* CTL cannot be changed and is always _DSCP_CS6
*/
SYSCTL_NODE(_net_qos, OID_AUTO, custom,
CTLFLAG_RW | CTLFLAG_LOCKED, 0, "");
SYSCTL_NODE(_net_qos_custom, OID_AUTO, netsvctype_to_dscp,
CTLFLAG_RW | CTLFLAG_LOCKED, 0, "");
static int sysctl_net_qos_custom_netsvctype_to_dscp SYSCTL_HANDLER_ARGS;
SYSCTL_PROC(_net_qos_custom_netsvctype_to_dscp, OID_AUTO, be,
CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_LOCKED,
0, NET_SERVICE_TYPE_BE, sysctl_net_qos_custom_netsvctype_to_dscp, "I", "");
SYSCTL_PROC(_net_qos_custom_netsvctype_to_dscp, OID_AUTO, bk,
CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_LOCKED,
0, NET_SERVICE_TYPE_BK, sysctl_net_qos_custom_netsvctype_to_dscp, "I", "");
SYSCTL_PROC(_net_qos_custom_netsvctype_to_dscp, OID_AUTO, sig,
CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_LOCKED,
0, NET_SERVICE_TYPE_SIG, sysctl_net_qos_custom_netsvctype_to_dscp, "I", "");
SYSCTL_PROC(_net_qos_custom_netsvctype_to_dscp, OID_AUTO, vi,
CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_LOCKED,
0, NET_SERVICE_TYPE_VI, sysctl_net_qos_custom_netsvctype_to_dscp, "I", "");
SYSCTL_PROC(_net_qos_custom_netsvctype_to_dscp, OID_AUTO, vo,
CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_LOCKED,
0, NET_SERVICE_TYPE_VO, sysctl_net_qos_custom_netsvctype_to_dscp, "I", "");
SYSCTL_PROC(_net_qos_custom_netsvctype_to_dscp, OID_AUTO, rv,
CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_LOCKED,
0, NET_SERVICE_TYPE_RV, sysctl_net_qos_custom_netsvctype_to_dscp, "I", "");
SYSCTL_PROC(_net_qos_custom_netsvctype_to_dscp, OID_AUTO, av,
CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_LOCKED,
0, NET_SERVICE_TYPE_AV, sysctl_net_qos_custom_netsvctype_to_dscp, "I", "");
SYSCTL_PROC(_net_qos_custom_netsvctype_to_dscp, OID_AUTO, oam,
CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_LOCKED,
0, NET_SERVICE_TYPE_OAM, sysctl_net_qos_custom_netsvctype_to_dscp, "I", "");
SYSCTL_PROC(_net_qos_custom_netsvctype_to_dscp, OID_AUTO, rd,
CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_LOCKED,
0, NET_SERVICE_TYPE_RD, sysctl_net_qos_custom_netsvctype_to_dscp, "I", "");
static int sysctl_net_qos_custom_reset SYSCTL_HANDLER_ARGS;
SYSCTL_PROC(_net_qos_custom, OID_AUTO, reset,
CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_LOCKED,
0, 0, sysctl_net_qos_custom_reset, "I", "");
int
sysctl_net_qos_custom_netsvctype_to_dscp SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1)
int error = 0;
switch (arg2) {
case NET_SERVICE_TYPE_BE:
case NET_SERVICE_TYPE_BK:
case NET_SERVICE_TYPE_SIG:
case NET_SERVICE_TYPE_VI:
case NET_SERVICE_TYPE_VO:
case NET_SERVICE_TYPE_RV:
case NET_SERVICE_TYPE_AV:
case NET_SERVICE_TYPE_OAM:
case NET_SERVICE_TYPE_RD:
break;
default:
os_log(OS_LOG_DEFAULT, "%s: unexpected netsvctype %d",
__func__, arg2);
return EINVAL;
}
int val = custom_net_qos_dscp_map.netsvctype_to_dscp[arg2];
error = sysctl_handle_int(oidp, &val, 0, req);
if (error != 0 || req->newptr == USER_ADDR_NULL) {
return error;
}
if (req->newptr == USER_ADDR_NULL) {
return 0;
}
error = proc_suser(current_proc());
if (error != 0) {
return error;
}
if (val < 0 || val > _MAX_DSCP) {
os_log(OS_LOG_DEFAULT, "%s: unexpected DSCP %d",
__func__, val);
return EINVAL;
}
struct netsvctype_dscp_map netsvctype_dscp_map[_NET_SERVICE_TYPE_COUNT] = {};
for (int i = 0; i < _NET_SERVICE_TYPE_COUNT; i++) {
netsvctype_dscp_map[i].netsvctype = i;
netsvctype_dscp_map[i].dscp = custom_net_qos_dscp_map.netsvctype_to_dscp[i];
}
netsvctype_dscp_map[arg2].dscp = (uint8_t) val;
error = set_netsvctype_dscp_map(&custom_net_qos_dscp_map,
netsvctype_dscp_map);
return 0;
}
int
sysctl_net_qos_custom_reset SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)
int error = 0;
int val = 0;
error = sysctl_handle_int(oidp, &val, 0, req);
if (error || !req->newptr) {
return error;
}
if (req->newptr == USER_ADDR_NULL) {
return 0;
}
error = proc_suser(current_proc());
if (error != 0) {
return error;
}
error = set_netsvctype_dscp_map(&custom_net_qos_dscp_map,
rfc4594_netsvctype_dscp_map);
return error;
}
uint8_t
custom_sc_to_dscp(uint32_t svc_class)
{
uint8_t dscp = _DSCP_DF;
switch (svc_class) {
case MBUF_SC_BK_SYS:
dscp = custom_net_qos_dscp_map.sotc_to_dscp[SOTCIX_BK_SYS];
break;
case MBUF_SC_BK:
dscp = custom_net_qos_dscp_map.sotc_to_dscp[SOTCIX_BK];
break;
case MBUF_SC_BE:
dscp = custom_net_qos_dscp_map.sotc_to_dscp[SOTCIX_BE];
break;
case MBUF_SC_RD:
dscp = custom_net_qos_dscp_map.sotc_to_dscp[SOTCIX_RD];
break;
case MBUF_SC_OAM:
dscp = custom_net_qos_dscp_map.sotc_to_dscp[SOTCIX_OAM];
break;
case MBUF_SC_AV:
dscp = custom_net_qos_dscp_map.sotc_to_dscp[SOTCIX_AV];
break;
case MBUF_SC_RV:
dscp = custom_net_qos_dscp_map.sotc_to_dscp[SOTCIX_RV];
break;
case MBUF_SC_VI:
dscp = custom_net_qos_dscp_map.sotc_to_dscp[SOTCIX_VI];
break;
case MBUF_SC_SIG:
dscp = custom_net_qos_dscp_map.netsvctype_to_dscp[NET_SERVICE_TYPE_SIG];
break;
case MBUF_SC_VO:
dscp = custom_net_qos_dscp_map.sotc_to_dscp[SOTCIX_VO];
break;
case MBUF_SC_CTL:
dscp = custom_net_qos_dscp_map.sotc_to_dscp[SOTCIX_CTL];
break;
default:
break;
}
return dscp;
}
#endif /* (DEBUG || DEVELOPMENT) */
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