/*
- * Copyright (c) 1999-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1999-2017 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @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 OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * 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/sys_domain.h>
#include <sys/kern_event.h>
#include <sys/kern_control.h>
+#include <sys/kauth.h>
+#include <sys/sysctl.h>
+#include <sys/proc_info.h>
#include <net/if_var.h>
#include <mach/vm_types.h>
-#include <mach/kmod.h>
#include <kern/thread.h>
+struct kctl {
+ TAILQ_ENTRY(kctl) next; /* controller chain */
+ kern_ctl_ref kctlref;
+
+ /* controller information provided when registering */
+ char name[MAX_KCTL_NAME]; /* unique identifier */
+ u_int32_t id;
+ u_int32_t reg_unit;
+
+ /* misc communication information */
+ u_int32_t flags; /* support flags */
+ u_int32_t recvbufsize; /* request more than the default buffer size */
+ u_int32_t sendbufsize; /* request more than the default buffer size */
+
+ /* Dispatch functions */
+ ctl_bind_func bind; /* Prepare contact */
+ ctl_connect_func connect; /* Make contact */
+ ctl_disconnect_func disconnect; /* Break contact */
+ ctl_send_func send; /* Send data to nke */
+ ctl_send_list_func send_list; /* Send list of packets */
+ ctl_setopt_func setopt; /* set kctl configuration */
+ ctl_getopt_func getopt; /* get kctl configuration */
+ ctl_rcvd_func rcvd; /* Notify nke when client reads data */
+
+ TAILQ_HEAD(, ctl_cb) kcb_head;
+ u_int32_t lastunit;
+};
+
+#if DEVELOPMENT || DEBUG
+enum ctl_status {
+ KCTL_DISCONNECTED = 0,
+ KCTL_CONNECTING = 1,
+ KCTL_CONNECTED = 2
+};
+#endif /* DEVELOPMENT || DEBUG */
+
+struct ctl_cb {
+ TAILQ_ENTRY(ctl_cb) next; /* controller chain */
+ lck_mtx_t *mtx;
+ struct socket *so; /* controlling socket */
+ struct kctl *kctl; /* back pointer to controller */
+ void *userdata;
+ struct sockaddr_ctl sac;
+ u_int32_t usecount;
+ u_int32_t kcb_usecount;
+#if DEVELOPMENT || DEBUG
+ enum ctl_status status;
+#endif /* DEVELOPMENT || DEBUG */
+};
+
+#ifndef ROUNDUP64
+#define ROUNDUP64(x) P2ROUNDUP((x), sizeof (u_int64_t))
+#endif
+
+#ifndef ADVANCE64
+#define ADVANCE64(p, n) (void*)((char *)(p) + ROUNDUP64(n))
+#endif
+
/*
* Definitions and vars for we support
*/
-#define CTL_SENDSIZE (2 * 1024) /* default buffer size */
-#define CTL_RECVSIZE (8 * 1024) /* default buffer size */
+#define CTL_SENDSIZE (2 * 1024) /* default buffer size */
+#define CTL_RECVSIZE (8 * 1024) /* default buffer size */
/*
* Definitions and vars for we support
*/
-static u_int32_t ctl_last_id = 0;
-static u_int32_t ctl_max = 256;
-static u_int32_t ctl_maxunit = 65536;
-static lck_grp_attr_t *ctl_lck_grp_attr = 0;
-static lck_attr_t *ctl_lck_attr = 0;
-static lck_grp_t *ctl_lck_grp = 0;
-static lck_mtx_t *ctl_mtx;
-
+static u_int32_t ctl_maxunit = 65536;
+static lck_grp_attr_t *ctl_lck_grp_attr = 0;
+static lck_attr_t *ctl_lck_attr = 0;
+static lck_grp_t *ctl_lck_grp = 0;
+static lck_mtx_t *ctl_mtx;
/* all the controllers are chained */
-TAILQ_HEAD(, kctl) ctl_head;
+TAILQ_HEAD(kctl_list, kctl) ctl_head;
static int ctl_attach(struct socket *, int, struct proc *);
static int ctl_detach(struct socket *);
static int ctl_sofreelastref(struct socket *so);
+static int ctl_bind(struct socket *, struct sockaddr *, struct proc *);
static int ctl_connect(struct socket *, struct sockaddr *, struct proc *);
static int ctl_disconnect(struct socket *);
static int ctl_ioctl(struct socket *so, u_long cmd, caddr_t data,
- struct ifnet *ifp, struct proc *p);
+ struct ifnet *ifp, struct proc *p);
static int ctl_send(struct socket *, int, struct mbuf *,
- struct sockaddr *, struct mbuf *, struct proc *);
+ struct sockaddr *, struct mbuf *, struct proc *);
+static int ctl_send_list(struct socket *, int, struct mbuf *,
+ struct sockaddr *, struct mbuf *, struct proc *);
static int ctl_ctloutput(struct socket *, struct sockopt *);
static int ctl_peeraddr(struct socket *so, struct sockaddr **nam);
+static int ctl_usr_rcvd(struct socket *so, int flags);
-static struct kctl *ctl_find_by_id(u_int32_t);
static struct kctl *ctl_find_by_name(const char *);
static struct kctl *ctl_find_by_id_unit(u_int32_t id, u_int32_t unit);
+static struct socket *kcb_find_socket(kern_ctl_ref kctlref, u_int32_t unit,
+ u_int32_t *);
static struct ctl_cb *kcb_find(struct kctl *, u_int32_t unit);
-static void ctl_post_msg(u_long event_code, u_int32_t id);
+static void ctl_post_msg(u_int32_t event_code, u_int32_t id);
-static int ctl_lock(struct socket *, int, int);
-static int ctl_unlock(struct socket *, int, int);
+static int ctl_lock(struct socket *, int, void *);
+static int ctl_unlock(struct socket *, int, void *);
static lck_mtx_t * ctl_getlock(struct socket *, int);
-static struct pr_usrreqs ctl_usrreqs =
-{
- pru_abort_notsupp, pru_accept_notsupp, ctl_attach, pru_bind_notsupp,
- ctl_connect, pru_connect2_notsupp, ctl_ioctl, ctl_detach,
- ctl_disconnect, pru_listen_notsupp, ctl_peeraddr,
- pru_rcvd_notsupp, pru_rcvoob_notsupp, ctl_send,
- pru_sense_null, pru_shutdown_notsupp, pru_sockaddr_notsupp,
- sosend, soreceive, pru_sopoll_notsupp
+static struct pr_usrreqs ctl_usrreqs = {
+ .pru_attach = ctl_attach,
+ .pru_bind = ctl_bind,
+ .pru_connect = ctl_connect,
+ .pru_control = ctl_ioctl,
+ .pru_detach = ctl_detach,
+ .pru_disconnect = ctl_disconnect,
+ .pru_peeraddr = ctl_peeraddr,
+ .pru_rcvd = ctl_usr_rcvd,
+ .pru_send = ctl_send,
+ .pru_send_list = ctl_send_list,
+ .pru_sosend = sosend,
+ .pru_sosend_list = sosend_list,
+ .pru_soreceive = soreceive,
+ .pru_soreceive_list = soreceive_list,
};
-static struct protosw kctlswk_dgram =
-{
- SOCK_DGRAM, &systemdomain, SYSPROTO_CONTROL,
- PR_ATOMIC|PR_CONNREQUIRED|PR_PCBLOCK,
- NULL, NULL, NULL, ctl_ctloutput,
- NULL, NULL,
- NULL, NULL, NULL, NULL, &ctl_usrreqs,
- ctl_lock, ctl_unlock, ctl_getlock, { 0, 0 } , 0, { 0 }
+static struct protosw kctlsw[] = {
+ {
+ .pr_type = SOCK_DGRAM,
+ .pr_protocol = SYSPROTO_CONTROL,
+ .pr_flags = PR_ATOMIC | PR_CONNREQUIRED | PR_PCBLOCK | PR_WANTRCVD,
+ .pr_ctloutput = ctl_ctloutput,
+ .pr_usrreqs = &ctl_usrreqs,
+ .pr_lock = ctl_lock,
+ .pr_unlock = ctl_unlock,
+ .pr_getlock = ctl_getlock,
+ },
+ {
+ .pr_type = SOCK_STREAM,
+ .pr_protocol = SYSPROTO_CONTROL,
+ .pr_flags = PR_CONNREQUIRED | PR_PCBLOCK | PR_WANTRCVD,
+ .pr_ctloutput = ctl_ctloutput,
+ .pr_usrreqs = &ctl_usrreqs,
+ .pr_lock = ctl_lock,
+ .pr_unlock = ctl_unlock,
+ .pr_getlock = ctl_getlock,
+ }
};
-static struct protosw kctlswk_stream =
-{
- SOCK_STREAM, &systemdomain, SYSPROTO_CONTROL,
- PR_CONNREQUIRED|PR_PCBLOCK,
- NULL, NULL, NULL, ctl_ctloutput,
- NULL, NULL,
- NULL, NULL, NULL, NULL, &ctl_usrreqs,
- ctl_lock, ctl_unlock, ctl_getlock, { 0, 0 } , 0, { 0 }
-};
+__private_extern__ int kctl_reg_list SYSCTL_HANDLER_ARGS;
+__private_extern__ int kctl_pcblist SYSCTL_HANDLER_ARGS;
+__private_extern__ int kctl_getstat SYSCTL_HANDLER_ARGS;
+
+
+SYSCTL_NODE(_net_systm, OID_AUTO, kctl,
+ CTLFLAG_RW | CTLFLAG_LOCKED, 0, "Kernel control family");
+
+struct kctlstat kctlstat;
+SYSCTL_PROC(_net_systm_kctl, OID_AUTO, stats,
+ CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0,
+ kctl_getstat, "S,kctlstat", "");
+
+SYSCTL_PROC(_net_systm_kctl, OID_AUTO, reg_list,
+ CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0,
+ kctl_reg_list, "S,xkctl_reg", "");
+
+SYSCTL_PROC(_net_systm_kctl, OID_AUTO, pcblist,
+ CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0,
+ kctl_pcblist, "S,xkctlpcb", "");
+u_int32_t ctl_autorcvbuf_max = 256 * 1024;
+SYSCTL_INT(_net_systm_kctl, OID_AUTO, autorcvbufmax,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &ctl_autorcvbuf_max, 0, "");
+
+u_int32_t ctl_autorcvbuf_high = 0;
+SYSCTL_INT(_net_systm_kctl, OID_AUTO, autorcvbufhigh,
+ CTLFLAG_RD | CTLFLAG_LOCKED, &ctl_autorcvbuf_high, 0, "");
+
+u_int32_t ctl_debug = 0;
+SYSCTL_INT(_net_systm_kctl, OID_AUTO, debug,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &ctl_debug, 0, "");
+
+#if DEVELOPMENT || DEBUG
+u_int32_t ctl_panic_debug = 0;
+SYSCTL_INT(_net_systm_kctl, OID_AUTO, panicdebug,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &ctl_panic_debug, 0, "");
+#endif /* DEVELOPMENT || DEBUG */
+
+#define KCTL_TBL_INC 16
+
+static uintptr_t kctl_tbl_size = 0;
+static u_int32_t kctl_tbl_growing = 0;
+static u_int32_t kctl_tbl_growing_waiting = 0;
+static uintptr_t kctl_tbl_count = 0;
+static struct kctl **kctl_table = NULL;
+static uintptr_t kctl_ref_gencnt = 0;
+
+static void kctl_tbl_grow(void);
+static kern_ctl_ref kctl_make_ref(struct kctl *kctl);
+static void kctl_delete_ref(kern_ctl_ref);
+static struct kctl *kctl_from_ref(kern_ctl_ref);
/*
* Install the protosw's for the Kernel Control manager.
*/
-__private_extern__ int
-kern_control_init(void)
+__private_extern__ void
+kern_control_init(struct domain *dp)
{
- int error = 0;
-
+ struct protosw *pr;
+ int i;
+ int kctl_proto_count = (sizeof(kctlsw) / sizeof(struct protosw));
+
+ VERIFY(!(dp->dom_flags & DOM_INITIALIZED));
+ VERIFY(dp == systemdomain);
+
ctl_lck_grp_attr = lck_grp_attr_alloc_init();
- if (ctl_lck_grp_attr == 0) {
- printf(": lck_grp_attr_alloc_init failed\n");
- error = ENOMEM;
- goto done;
- }
-
- ctl_lck_grp = lck_grp_alloc_init("Kernel Control Protocol", ctl_lck_grp_attr);
- if (ctl_lck_grp == 0) {
- printf("kern_control_init: lck_grp_alloc_init failed\n");
- error = ENOMEM;
- goto done;
- }
-
+ if (ctl_lck_grp_attr == NULL) {
+ panic("%s: lck_grp_attr_alloc_init failed\n", __func__);
+ /* NOTREACHED */
+ }
+
+ ctl_lck_grp = lck_grp_alloc_init("Kernel Control Protocol",
+ ctl_lck_grp_attr);
+ if (ctl_lck_grp == NULL) {
+ panic("%s: lck_grp_alloc_init failed\n", __func__);
+ /* NOTREACHED */
+ }
+
ctl_lck_attr = lck_attr_alloc_init();
- if (ctl_lck_attr == 0) {
- printf("kern_control_init: lck_attr_alloc_init failed\n");
- error = ENOMEM;
- goto done;
+ if (ctl_lck_attr == NULL) {
+ panic("%s: lck_attr_alloc_init failed\n", __func__);
+ /* NOTREACHED */
}
-
+
ctl_mtx = lck_mtx_alloc_init(ctl_lck_grp, ctl_lck_attr);
- if (ctl_mtx == 0) {
- printf("kern_control_init: lck_mtx_alloc_init failed\n");
- error = ENOMEM;
- goto done;
+ if (ctl_mtx == NULL) {
+ panic("%s: lck_mtx_alloc_init failed\n", __func__);
+ /* NOTREACHED */
}
TAILQ_INIT(&ctl_head);
-
- error = net_add_proto(&kctlswk_dgram, &systemdomain);
- if (error) {
- log(LOG_WARNING, "kern_control_init: net_add_proto dgram failed (%d)\n", error);
- }
- error = net_add_proto(&kctlswk_stream, &systemdomain);
- if (error) {
- log(LOG_WARNING, "kern_control_init: net_add_proto stream failed (%d)\n", error);
- }
-
- done:
- if (error != 0) {
- if (ctl_mtx) {
- lck_mtx_free(ctl_mtx, ctl_lck_grp);
- ctl_mtx = 0;
- }
- if (ctl_lck_grp) {
- lck_grp_free(ctl_lck_grp);
- ctl_lck_grp = 0;
- }
- if (ctl_lck_grp_attr) {
- lck_grp_attr_free(ctl_lck_grp_attr);
- ctl_lck_grp_attr = 0;
- }
- if (ctl_lck_attr) {
- lck_attr_free(ctl_lck_attr);
- ctl_lck_attr = 0;
- }
+
+ for (i = 0, pr = &kctlsw[0]; i < kctl_proto_count; i++, pr++) {
+ net_add_proto(pr, dp, 1);
}
- return error;
}
static void
kcb_delete(struct ctl_cb *kcb)
{
if (kcb != 0) {
- if (kcb->mtx != 0)
+ if (kcb->mtx != 0) {
lck_mtx_free(kcb->mtx, ctl_lck_grp);
+ }
FREE(kcb, M_TEMP);
}
}
-
/*
* Kernel Controller user-request functions
- * attach function must exist and succeed
- * detach not necessary
+ * attach function must exist and succeed
+ * detach not necessary
* we need a pcb for the per socket mutex
*/
static int
-ctl_attach(__unused struct socket *so, __unused int proto, __unused struct proc *p)
-{
+ctl_attach(struct socket *so, int proto, struct proc *p)
+{
+#pragma unused(proto, p)
int error = 0;
- struct ctl_cb *kcb = 0;
+ struct ctl_cb *kcb = 0;
MALLOC(kcb, struct ctl_cb *, sizeof(struct ctl_cb), M_TEMP, M_WAITOK);
if (kcb == NULL) {
goto quit;
}
bzero(kcb, sizeof(struct ctl_cb));
-
+
kcb->mtx = lck_mtx_alloc_init(ctl_lck_grp, ctl_lck_attr);
if (kcb->mtx == NULL) {
error = ENOMEM;
}
kcb->so = so;
so->so_pcb = (caddr_t)kcb;
-
+
quit:
if (error != 0) {
kcb_delete(kcb);
static int
ctl_sofreelastref(struct socket *so)
{
- struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
+ struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
+
+ so->so_pcb = 0;
+
+ if (kcb != 0) {
+ struct kctl *kctl;
+ if ((kctl = kcb->kctl) != 0) {
+ lck_mtx_lock(ctl_mtx);
+ TAILQ_REMOVE(&kctl->kcb_head, kcb, next);
+ kctlstat.kcs_pcbcount--;
+ kctlstat.kcs_gencnt++;
+ lck_mtx_unlock(ctl_mtx);
+ }
+ kcb_delete(kcb);
+ }
+ sofreelastref(so, 1);
+ return 0;
+}
+
+/*
+ * Use this function to serialize calls into the kctl subsystem
+ */
+static void
+ctl_kcb_increment_use_count(struct ctl_cb *kcb, lck_mtx_t *mutex_held)
+{
+ LCK_MTX_ASSERT(mutex_held, LCK_MTX_ASSERT_OWNED);
+ while (kcb->kcb_usecount > 0) {
+ msleep(&kcb->kcb_usecount, mutex_held, PSOCK | PCATCH, "kcb_usecount", NULL);
+ }
+ kcb->kcb_usecount++;
+}
- so->so_pcb = 0;
-
- if (kcb != 0) {
- struct kctl *kctl;
- if ((kctl = kcb->kctl) != 0) {
- lck_mtx_lock(ctl_mtx);
- TAILQ_REMOVE(&kctl->kcb_head, kcb, next);
- lck_mtx_lock(ctl_mtx);
- }
- kcb_delete(kcb);
- }
- return 0;
+static void
+clt_kcb_decrement_use_count(struct ctl_cb *kcb)
+{
+ assert(kcb->kcb_usecount != 0);
+ kcb->kcb_usecount--;
+ wakeup_one((caddr_t)&kcb->kcb_usecount);
}
static int
ctl_detach(struct socket *so)
{
- struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
-
- if (kcb == 0)
- return 0;
+ struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
- soisdisconnected(so);
- so->so_flags |= SOF_PCBCLEARING;
- return 0;
-}
+ if (kcb == 0) {
+ return 0;
+ }
+
+ lck_mtx_t *mtx_held = socket_getlock(so, PR_F_WILLUNLOCK);
+ ctl_kcb_increment_use_count(kcb, mtx_held);
+
+ if (kcb->kctl != NULL && kcb->kctl->bind != NULL &&
+ kcb->userdata != NULL && !(so->so_state & SS_ISCONNECTED)) {
+ // The unit was bound, but not connected
+ // Invoke the disconnected call to cleanup
+ if (kcb->kctl->disconnect != NULL) {
+ socket_unlock(so, 0);
+ (*kcb->kctl->disconnect)(kcb->kctl->kctlref,
+ kcb->sac.sc_unit, kcb->userdata);
+ socket_lock(so, 0);
+ }
+ }
+ soisdisconnected(so);
+#if DEVELOPMENT || DEBUG
+ kcb->status = KCTL_DISCONNECTED;
+#endif /* DEVELOPMENT || DEBUG */
+ so->so_flags |= SOF_PCBCLEARING;
+ clt_kcb_decrement_use_count(kcb);
+ return 0;
+}
static int
-ctl_connect(struct socket *so, struct sockaddr *nam, __unused struct proc *p)
-{
- struct kctl *kctl;
- int error = 0;
- struct sockaddr_ctl sa;
- struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
-
- if (kcb == 0)
- panic("ctl_connect so_pcb null\n");
-
- if (nam->sa_len != sizeof(struct sockaddr_ctl))
- return(EINVAL);
-
- bcopy(nam, &sa, sizeof(struct sockaddr_ctl));
-
- lck_mtx_lock(ctl_mtx);
- kctl = ctl_find_by_id_unit(sa.sc_id, sa.sc_unit);
- if (kctl == NULL) {
- lck_mtx_unlock(ctl_mtx);
- return ENOENT;
- }
+ctl_setup_kctl(struct socket *so, struct sockaddr *nam, struct proc *p)
+{
+ struct kctl *kctl = NULL;
+ int error = 0;
+ struct sockaddr_ctl sa;
+ struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
+ struct ctl_cb *kcb_next = NULL;
+ u_quad_t sbmaxsize;
+ u_int32_t recvbufsize, sendbufsize;
- if (((kctl->flags & CTL_FLAG_REG_SOCK_STREAM) && (so->so_type != SOCK_STREAM)) ||
- (!(kctl->flags & CTL_FLAG_REG_SOCK_STREAM) && (so->so_type != SOCK_DGRAM))) {
- lck_mtx_unlock(ctl_mtx);
- return EPROTOTYPE;
+ if (kcb == 0) {
+ panic("ctl_setup_kctl so_pcb null\n");
+ }
+
+ if (kcb->kctl != NULL) {
+ // Already set up, skip
+ return 0;
+ }
+
+ if (nam->sa_len != sizeof(struct sockaddr_ctl)) {
+ return EINVAL;
+ }
+
+ bcopy(nam, &sa, sizeof(struct sockaddr_ctl));
+
+ lck_mtx_lock(ctl_mtx);
+ kctl = ctl_find_by_id_unit(sa.sc_id, sa.sc_unit);
+ if (kctl == NULL) {
+ lck_mtx_unlock(ctl_mtx);
+ return ENOENT;
+ }
+
+ if (((kctl->flags & CTL_FLAG_REG_SOCK_STREAM) &&
+ (so->so_type != SOCK_STREAM)) ||
+ (!(kctl->flags & CTL_FLAG_REG_SOCK_STREAM) &&
+ (so->so_type != SOCK_DGRAM))) {
+ lck_mtx_unlock(ctl_mtx);
+ return EPROTOTYPE;
}
- if (kctl->flags & CTL_FLAG_PRIVILEGED) {
- if (p == 0) {
- lck_mtx_unlock(ctl_mtx);
- return(EINVAL);
- }
- if ((error = proc_suser(p))) {
- lck_mtx_unlock(ctl_mtx);
- return error;
- }
- }
+ if (kctl->flags & CTL_FLAG_PRIVILEGED) {
+ if (p == 0) {
+ lck_mtx_unlock(ctl_mtx);
+ return EINVAL;
+ }
+ if (kauth_cred_issuser(kauth_cred_get()) == 0) {
+ lck_mtx_unlock(ctl_mtx);
+ return EPERM;
+ }
+ }
if ((kctl->flags & CTL_FLAG_REG_ID_UNIT) || sa.sc_unit != 0) {
if (kcb_find(kctl, sa.sc_unit) != NULL) {
return EBUSY;
}
} else {
- u_int32_t unit = kctl->lastunit + 1;
-
- while (1) {
- if (unit == ctl_maxunit)
- unit = 1;
- if (kcb_find(kctl, unit) == NULL) {
- kctl->lastunit = sa.sc_unit = unit;
- break;
- }
- if (unit++ == kctl->lastunit) {
- lck_mtx_unlock(ctl_mtx);
- return EBUSY;
- }
- }
- }
-
- kcb->unit = sa.sc_unit;
- kcb->kctl = kctl;
- TAILQ_INSERT_TAIL(&kctl->kcb_head, kcb, next);
- lck_mtx_unlock(ctl_mtx);
-
- error = soreserve(so, kctl->sendbufsize, kctl->recvbufsize);
- if (error)
+ /* Find an unused ID, assumes control IDs are in order */
+ u_int32_t unit = 1;
+
+ TAILQ_FOREACH(kcb_next, &kctl->kcb_head, next) {
+ if (kcb_next->sac.sc_unit > unit) {
+ /* Found a gap, lets fill it in */
+ break;
+ }
+ unit = kcb_next->sac.sc_unit + 1;
+ if (unit == ctl_maxunit) {
+ break;
+ }
+ }
+
+ if (unit == ctl_maxunit) {
+ lck_mtx_unlock(ctl_mtx);
+ return EBUSY;
+ }
+
+ sa.sc_unit = unit;
+ }
+
+ bcopy(&sa, &kcb->sac, sizeof(struct sockaddr_ctl));
+ kcb->kctl = kctl;
+ if (kcb_next != NULL) {
+ TAILQ_INSERT_BEFORE(kcb_next, kcb, next);
+ } else {
+ TAILQ_INSERT_TAIL(&kctl->kcb_head, kcb, next);
+ }
+ kctlstat.kcs_pcbcount++;
+ kctlstat.kcs_gencnt++;
+ kctlstat.kcs_connections++;
+ lck_mtx_unlock(ctl_mtx);
+
+ /*
+ * rdar://15526688: Limit the send and receive sizes to sb_max
+ * by using the same scaling as sbreserve()
+ */
+ sbmaxsize = (u_quad_t)sb_max * MCLBYTES / (MSIZE + MCLBYTES);
+
+ if (kctl->sendbufsize > sbmaxsize) {
+ sendbufsize = sbmaxsize;
+ } else {
+ sendbufsize = kctl->sendbufsize;
+ }
+
+ if (kctl->recvbufsize > sbmaxsize) {
+ recvbufsize = sbmaxsize;
+ } else {
+ recvbufsize = kctl->recvbufsize;
+ }
+
+ error = soreserve(so, sendbufsize, recvbufsize);
+ if (error) {
+ if (ctl_debug) {
+ printf("%s - soreserve(%llx, %u, %u) error %d\n",
+ __func__, (uint64_t)VM_KERNEL_ADDRPERM(so),
+ sendbufsize, recvbufsize, error);
+ }
goto done;
- soisconnecting(so);
-
+ }
+
+done:
+ if (error) {
+ soisdisconnected(so);
+#if DEVELOPMENT || DEBUG
+ kcb->status = KCTL_DISCONNECTED;
+#endif /* DEVELOPMENT || DEBUG */
+ lck_mtx_lock(ctl_mtx);
+ TAILQ_REMOVE(&kctl->kcb_head, kcb, next);
+ kcb->kctl = NULL;
+ kcb->sac.sc_unit = 0;
+ kctlstat.kcs_pcbcount--;
+ kctlstat.kcs_gencnt++;
+ kctlstat.kcs_conn_fail++;
+ lck_mtx_unlock(ctl_mtx);
+ }
+ return error;
+}
+
+static int
+ctl_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
+{
+ int error = 0;
+ struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
+
+ if (kcb == NULL) {
+ panic("ctl_bind so_pcb null\n");
+ }
+
+ lck_mtx_t *mtx_held = socket_getlock(so, PR_F_WILLUNLOCK);
+ ctl_kcb_increment_use_count(kcb, mtx_held);
+
+ error = ctl_setup_kctl(so, nam, p);
+ if (error) {
+ goto out;
+ }
+
+ if (kcb->kctl == NULL) {
+ panic("ctl_bind kctl null\n");
+ }
+
+ if (kcb->kctl->bind == NULL) {
+ error = EINVAL;
+ goto out;
+ }
+
socket_unlock(so, 0);
- error = (*kctl->connect)(kctl, &sa, &kcb->userdata);
+ error = (*kcb->kctl->bind)(kcb->kctl->kctlref, &kcb->sac, &kcb->userdata);
socket_lock(so, 0);
- if (error)
- goto done;
-
- soisconnected(so);
-done:
- if (error) {
- soisdisconnected(so);
- lck_mtx_lock(ctl_mtx);
- kcb->kctl = 0;
- kcb->unit = 0;
- TAILQ_REMOVE(&kctl->kcb_head, kcb, next);
- lck_mtx_unlock(ctl_mtx);
- }
- return error;
+out:
+ clt_kcb_decrement_use_count(kcb);
+ return error;
+}
+
+static int
+ctl_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
+{
+ int error = 0;
+ struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
+
+ if (kcb == NULL) {
+ panic("ctl_connect so_pcb null\n");
+ }
+
+ lck_mtx_t *mtx_held = socket_getlock(so, PR_F_WILLUNLOCK);
+ ctl_kcb_increment_use_count(kcb, mtx_held);
+
+#if DEVELOPMENT || DEBUG
+ if (kcb->status != KCTL_DISCONNECTED && ctl_panic_debug) {
+ panic("kctl already connecting/connected");
+ }
+ kcb->status = KCTL_CONNECTING;
+#endif /* DEVELOPMENT || DEBUG */
+
+ error = ctl_setup_kctl(so, nam, p);
+ if (error) {
+ goto out;
+ }
+
+ if (kcb->kctl == NULL) {
+ panic("ctl_connect kctl null\n");
+ }
+
+ soisconnecting(so);
+ socket_unlock(so, 0);
+ error = (*kcb->kctl->connect)(kcb->kctl->kctlref, &kcb->sac, &kcb->userdata);
+ socket_lock(so, 0);
+ if (error) {
+ goto end;
+ }
+ soisconnected(so);
+#if DEVELOPMENT || DEBUG
+ kcb->status = KCTL_CONNECTED;
+#endif /* DEVELOPMENT || DEBUG */
+
+end:
+ if (error && kcb->kctl->disconnect) {
+ /*
+ * XXX Make sure we Don't check the return value
+ * of disconnect here.
+ * ipsec/utun_ctl_disconnect will return error when
+ * disconnect gets called after connect failure.
+ * However if we decide to check for disconnect return
+ * value here. Please make sure to revisit
+ * ipsec/utun_ctl_disconnect.
+ */
+ socket_unlock(so, 0);
+ (*kcb->kctl->disconnect)(kcb->kctl->kctlref, kcb->sac.sc_unit, kcb->userdata);
+ socket_lock(so, 0);
+ }
+ if (error) {
+ soisdisconnected(so);
+#if DEVELOPMENT || DEBUG
+ kcb->status = KCTL_DISCONNECTED;
+#endif /* DEVELOPMENT || DEBUG */
+ lck_mtx_lock(ctl_mtx);
+ TAILQ_REMOVE(&kcb->kctl->kcb_head, kcb, next);
+ kcb->kctl = NULL;
+ kcb->sac.sc_unit = 0;
+ kctlstat.kcs_pcbcount--;
+ kctlstat.kcs_gencnt++;
+ kctlstat.kcs_conn_fail++;
+ lck_mtx_unlock(ctl_mtx);
+ }
+out:
+ clt_kcb_decrement_use_count(kcb);
+ return error;
}
static int
ctl_disconnect(struct socket *so)
{
- struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
+ struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
- if ((kcb = (struct ctl_cb *)so->so_pcb)) {
- struct kctl *kctl = kcb->kctl;
-
- if (kctl && kctl->disconnect) {
- socket_unlock(so, 0);
- (*kctl->disconnect)(kctl, kcb->unit, kcb->userdata);
- socket_lock(so, 0);
- }
- lck_mtx_lock(ctl_mtx);
- kcb->kctl = 0;
- kcb->unit = 0;
- TAILQ_REMOVE(&kctl->kcb_head, kcb, next);
- soisdisconnected(so);
- lck_mtx_unlock(ctl_mtx);
- }
- return 0;
+ if ((kcb = (struct ctl_cb *)so->so_pcb)) {
+ lck_mtx_t *mtx_held = socket_getlock(so, PR_F_WILLUNLOCK);
+ ctl_kcb_increment_use_count(kcb, mtx_held);
+ struct kctl *kctl = kcb->kctl;
+
+ if (kctl && kctl->disconnect) {
+ socket_unlock(so, 0);
+ (*kctl->disconnect)(kctl->kctlref, kcb->sac.sc_unit,
+ kcb->userdata);
+ socket_lock(so, 0);
+ }
+
+ soisdisconnected(so);
+#if DEVELOPMENT || DEBUG
+ kcb->status = KCTL_DISCONNECTED;
+#endif /* DEVELOPMENT || DEBUG */
+
+ socket_unlock(so, 0);
+ lck_mtx_lock(ctl_mtx);
+ kcb->kctl = 0;
+ kcb->sac.sc_unit = 0;
+ while (kcb->usecount != 0) {
+ msleep(&kcb->usecount, ctl_mtx, 0, "kcb->usecount", 0);
+ }
+ TAILQ_REMOVE(&kctl->kcb_head, kcb, next);
+ kctlstat.kcs_pcbcount--;
+ kctlstat.kcs_gencnt++;
+ lck_mtx_unlock(ctl_mtx);
+ socket_lock(so, 0);
+ clt_kcb_decrement_use_count(kcb);
+ }
+ return 0;
}
static int
ctl_peeraddr(struct socket *so, struct sockaddr **nam)
{
- struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
- struct kctl *kctl;
- struct sockaddr_ctl sc;
-
- if (kcb == NULL) /* sanity check */
- return(ENOTCONN);
-
- if ((kctl = kcb->kctl) == NULL)
- return(EINVAL);
-
+ struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
+ struct kctl *kctl;
+ struct sockaddr_ctl sc;
+
+ if (kcb == NULL) { /* sanity check */
+ return ENOTCONN;
+ }
+
+ if ((kctl = kcb->kctl) == NULL) {
+ return EINVAL;
+ }
+
bzero(&sc, sizeof(struct sockaddr_ctl));
sc.sc_len = sizeof(struct sockaddr_ctl);
sc.sc_family = AF_SYSTEM;
sc.ss_sysaddr = AF_SYS_CONTROL;
sc.sc_id = kctl->id;
- sc.sc_unit = kcb->unit;
-
+ sc.sc_unit = kcb->sac.sc_unit;
+
*nam = dup_sockaddr((struct sockaddr *)&sc, 1);
-
+
return 0;
}
+static void
+ctl_sbrcv_trim(struct socket *so)
+{
+ struct sockbuf *sb = &so->so_rcv;
+
+ if (sb->sb_hiwat > sb->sb_idealsize) {
+ u_int32_t diff;
+ int32_t trim;
+
+ /*
+ * The difference between the ideal size and the
+ * current size is the upper bound of the trimage
+ */
+ diff = sb->sb_hiwat - sb->sb_idealsize;
+ /*
+ * We cannot trim below the outstanding data
+ */
+ trim = sb->sb_hiwat - sb->sb_cc;
+
+ trim = imin(trim, (int32_t)diff);
+
+ if (trim > 0) {
+ sbreserve(sb, (sb->sb_hiwat - trim));
+
+ if (ctl_debug) {
+ printf("%s - shrunk to %d\n",
+ __func__, sb->sb_hiwat);
+ }
+ }
+ }
+}
+
static int
-ctl_send(struct socket *so, int flags, struct mbuf *m,
- __unused struct sockaddr *addr, __unused struct mbuf *control,
- __unused struct proc *p)
-{
- int error = 0;
- struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
- struct kctl *kctl;
-
- if (kcb == NULL) /* sanity check */
- return(ENOTCONN);
-
- if ((kctl = kcb->kctl) == NULL)
- return(EINVAL);
-
- if (kctl->send) {
+ctl_usr_rcvd(struct socket *so, int flags)
+{
+ int error = 0;
+ struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
+ struct kctl *kctl;
+
+ if (kcb == NULL) {
+ return ENOTCONN;
+ }
+
+ lck_mtx_t *mtx_held = socket_getlock(so, PR_F_WILLUNLOCK);
+ ctl_kcb_increment_use_count(kcb, mtx_held);
+
+ if ((kctl = kcb->kctl) == NULL) {
+ error = EINVAL;
+ goto out;
+ }
+
+ if (kctl->rcvd) {
socket_unlock(so, 0);
- error = (*kctl->send)(kctl, kcb->unit, kcb->userdata, m, flags);
+ (*kctl->rcvd)(kctl->kctlref, kcb->sac.sc_unit, kcb->userdata, flags);
socket_lock(so, 0);
}
- return error;
-}
-errno_t
-ctl_enqueuembuf(void *kctlref, u_int32_t unit, struct mbuf *m, u_int32_t flags)
-{
- struct ctl_cb *kcb;
- struct socket *so;
- errno_t error = 0;
- struct kctl *kctl = (struct kctl *)kctlref;
-
- if (kctl == NULL)
- return EINVAL;
-
- kcb = kcb_find(kctl, unit);
- if (kcb == NULL)
- return EINVAL;
-
- so = (struct socket *)kcb->so;
- if (so == NULL)
- return EINVAL;
-
- socket_lock(so, 1);
- if (sbspace(&so->so_rcv) < m->m_pkthdr.len) {
- error = ENOBUFS;
- goto bye;
- }
- if ((flags & CTL_DATA_EOR))
- m->m_flags |= M_EOR;
- if (sbappend(&so->so_rcv, m) && (flags & CTL_DATA_NOWAKEUP) == 0)
- sorwakeup(so);
-bye:
- socket_unlock(so, 1);
+ ctl_sbrcv_trim(so);
+
+out:
+ clt_kcb_decrement_use_count(kcb);
return error;
}
-errno_t
-ctl_enqueuedata(void *kctlref, u_int32_t unit, void *data, size_t len, u_int32_t flags)
-{
- struct ctl_cb *kcb;
- struct socket *so;
- struct mbuf *m;
- errno_t error = 0;
- struct kctl *kctl = (struct kctl *)kctlref;
- unsigned int num_needed;
- struct mbuf *n;
- size_t curlen = 0;
-
- if (kctlref == NULL)
- return EINVAL;
-
- kcb = kcb_find(kctl, unit);
- if (kcb == NULL)
- return EINVAL;
-
- so = (struct socket *)kcb->so;
- if (so == NULL)
- return EINVAL;
-
- socket_lock(so, 1);
- if ((size_t)sbspace(&so->so_rcv) < len) {
- error = ENOBUFS;
- goto bye;
+static int
+ctl_send(struct socket *so, int flags, struct mbuf *m,
+ struct sockaddr *addr, struct mbuf *control,
+ struct proc *p)
+{
+#pragma unused(addr, p)
+ int error = 0;
+ struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
+ struct kctl *kctl;
+
+ if (control) {
+ m_freem(control);
}
- num_needed = 1;
- m = m_allocpacket_internal(&num_needed, len, NULL, M_NOWAIT, 1, 0);
- if (m == NULL) {
- printf("ctl_enqueuedata: m_allocpacket_internal(%lu) failed\n", len);
- error = ENOBUFS;
- goto bye;
+ if (kcb == NULL) { /* sanity check */
+ error = ENOTCONN;
}
-
+
+ lck_mtx_t *mtx_held = socket_getlock(so, PR_F_WILLUNLOCK);
+ ctl_kcb_increment_use_count(kcb, mtx_held);
+
+ if (error == 0 && (kctl = kcb->kctl) == NULL) {
+ error = EINVAL;
+ }
+
+ if (error == 0 && kctl->send) {
+ so_tc_update_stats(m, so, m_get_service_class(m));
+ socket_unlock(so, 0);
+ error = (*kctl->send)(kctl->kctlref, kcb->sac.sc_unit, kcb->userdata,
+ m, flags);
+ socket_lock(so, 0);
+ } else {
+ m_freem(m);
+ if (error == 0) {
+ error = ENOTSUP;
+ }
+ }
+ if (error != 0) {
+ OSIncrementAtomic64((SInt64 *)&kctlstat.kcs_send_fail);
+ }
+ clt_kcb_decrement_use_count(kcb);
+
+ return error;
+}
+
+static int
+ctl_send_list(struct socket *so, int flags, struct mbuf *m,
+ __unused struct sockaddr *addr, struct mbuf *control,
+ __unused struct proc *p)
+{
+ int error = 0;
+ struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
+ struct kctl *kctl;
+
+ if (control) {
+ m_freem_list(control);
+ }
+
+ if (kcb == NULL) { /* sanity check */
+ error = ENOTCONN;
+ }
+
+ lck_mtx_t *mtx_held = socket_getlock(so, PR_F_WILLUNLOCK);
+ ctl_kcb_increment_use_count(kcb, mtx_held);
+
+ if (error == 0 && (kctl = kcb->kctl) == NULL) {
+ error = EINVAL;
+ }
+
+ if (error == 0 && kctl->send_list) {
+ struct mbuf *nxt;
+
+ for (nxt = m; nxt != NULL; nxt = nxt->m_nextpkt) {
+ so_tc_update_stats(nxt, so, m_get_service_class(nxt));
+ }
+
+ socket_unlock(so, 0);
+ error = (*kctl->send_list)(kctl->kctlref, kcb->sac.sc_unit,
+ kcb->userdata, m, flags);
+ socket_lock(so, 0);
+ } else if (error == 0 && kctl->send) {
+ while (m != NULL && error == 0) {
+ struct mbuf *nextpkt = m->m_nextpkt;
+
+ m->m_nextpkt = NULL;
+ so_tc_update_stats(m, so, m_get_service_class(m));
+ socket_unlock(so, 0);
+ error = (*kctl->send)(kctl->kctlref, kcb->sac.sc_unit,
+ kcb->userdata, m, flags);
+ socket_lock(so, 0);
+ m = nextpkt;
+ }
+ if (m != NULL) {
+ m_freem_list(m);
+ }
+ } else {
+ m_freem_list(m);
+ if (error == 0) {
+ error = ENOTSUP;
+ }
+ }
+ if (error != 0) {
+ OSIncrementAtomic64((SInt64 *)&kctlstat.kcs_send_list_fail);
+ }
+ clt_kcb_decrement_use_count(kcb);
+
+ return error;
+}
+
+static errno_t
+ctl_rcvbspace(struct socket *so, u_int32_t datasize,
+ u_int32_t kctlflags, u_int32_t flags)
+{
+ struct sockbuf *sb = &so->so_rcv;
+ u_int32_t space = sbspace(sb);
+ errno_t error;
+
+ if ((kctlflags & CTL_FLAG_REG_CRIT) == 0) {
+ if ((u_int32_t) space >= datasize) {
+ error = 0;
+ } else {
+ error = ENOBUFS;
+ }
+ } else if ((flags & CTL_DATA_CRIT) == 0) {
+ /*
+ * Reserve 25% for critical messages
+ */
+ if (space < (sb->sb_hiwat >> 2) ||
+ space < datasize) {
+ error = ENOBUFS;
+ } else {
+ error = 0;
+ }
+ } else {
+ u_int32_t autorcvbuf_max;
+
+ /*
+ * Allow overcommit of 25%
+ */
+ autorcvbuf_max = min(sb->sb_idealsize + (sb->sb_idealsize >> 2),
+ ctl_autorcvbuf_max);
+
+ if ((u_int32_t) space >= datasize) {
+ error = 0;
+ } else if (tcp_cansbgrow(sb) &&
+ sb->sb_hiwat < autorcvbuf_max) {
+ /*
+ * Grow with a little bit of leeway
+ */
+ u_int32_t grow = datasize - space + MSIZE;
+
+ if (sbreserve(sb,
+ min((sb->sb_hiwat + grow), autorcvbuf_max)) == 1) {
+ if (sb->sb_hiwat > ctl_autorcvbuf_high) {
+ ctl_autorcvbuf_high = sb->sb_hiwat;
+ }
+
+ /*
+ * A final check
+ */
+ if ((u_int32_t) sbspace(sb) >= datasize) {
+ error = 0;
+ } else {
+ error = ENOBUFS;
+ }
+
+ if (ctl_debug) {
+ printf("%s - grown to %d error %d\n",
+ __func__, sb->sb_hiwat, error);
+ }
+ } else {
+ error = ENOBUFS;
+ }
+ } else {
+ error = ENOBUFS;
+ }
+ }
+ return error;
+}
+
+errno_t
+ctl_enqueuembuf(kern_ctl_ref kctlref, u_int32_t unit, struct mbuf *m,
+ u_int32_t flags)
+{
+ struct socket *so;
+ errno_t error = 0;
+ int len = m->m_pkthdr.len;
+ u_int32_t kctlflags;
+
+ so = kcb_find_socket(kctlref, unit, &kctlflags);
+ if (so == NULL) {
+ return EINVAL;
+ }
+
+ if (ctl_rcvbspace(so, len, kctlflags, flags) != 0) {
+ error = ENOBUFS;
+ OSIncrementAtomic64((SInt64 *)&kctlstat.kcs_enqueue_fullsock);
+ goto bye;
+ }
+ if ((flags & CTL_DATA_EOR)) {
+ m->m_flags |= M_EOR;
+ }
+
+ so_recv_data_stat(so, m, 0);
+ if (sbappend(&so->so_rcv, m) != 0) {
+ if ((flags & CTL_DATA_NOWAKEUP) == 0) {
+ sorwakeup(so);
+ }
+ } else {
+ error = ENOBUFS;
+ OSIncrementAtomic64((SInt64 *)&kctlstat.kcs_enqueue_fullsock);
+ }
+bye:
+ if (ctl_debug && error != 0 && (flags & CTL_DATA_CRIT)) {
+ printf("%s - crit data err %d len %d hiwat %d cc: %d\n",
+ __func__, error, len,
+ so->so_rcv.sb_hiwat, so->so_rcv.sb_cc);
+ }
+
+ socket_unlock(so, 1);
+ if (error != 0) {
+ OSIncrementAtomic64((SInt64 *)&kctlstat.kcs_enqueue_fail);
+ }
+
+ return error;
+}
+
+/*
+ * Compute space occupied by mbuf like sbappendrecord
+ */
+static int
+m_space(struct mbuf *m)
+{
+ int space = 0;
+ struct mbuf *nxt;
+
+ for (nxt = m; nxt != NULL; nxt = nxt->m_next) {
+ space += nxt->m_len;
+ }
+
+ return space;
+}
+
+errno_t
+ctl_enqueuembuf_list(void *kctlref, u_int32_t unit, struct mbuf *m_list,
+ u_int32_t flags, struct mbuf **m_remain)
+{
+ struct socket *so = NULL;
+ errno_t error = 0;
+ struct mbuf *m, *nextpkt;
+ int needwakeup = 0;
+ int len = 0;
+ u_int32_t kctlflags;
+
+ /*
+ * Need to point the beginning of the list in case of early exit
+ */
+ m = m_list;
+
+ /*
+ * kcb_find_socket takes the socket lock with a reference
+ */
+ so = kcb_find_socket(kctlref, unit, &kctlflags);
+ if (so == NULL) {
+ error = EINVAL;
+ goto done;
+ }
+
+ if (kctlflags & CTL_FLAG_REG_SOCK_STREAM) {
+ error = EOPNOTSUPP;
+ goto done;
+ }
+ if (flags & CTL_DATA_EOR) {
+ error = EINVAL;
+ goto done;
+ }
+
+ for (m = m_list; m != NULL; m = nextpkt) {
+ nextpkt = m->m_nextpkt;
+
+ if (m->m_pkthdr.len == 0 && ctl_debug) {
+ printf("%s: %llx m_pkthdr.len is 0",
+ __func__, (uint64_t)VM_KERNEL_ADDRPERM(m));
+ }
+
+ /*
+ * The mbuf is either appended or freed by sbappendrecord()
+ * so it's not reliable from a data standpoint
+ */
+ len = m_space(m);
+ if (ctl_rcvbspace(so, len, kctlflags, flags) != 0) {
+ error = ENOBUFS;
+ OSIncrementAtomic64(
+ (SInt64 *)&kctlstat.kcs_enqueue_fullsock);
+ break;
+ } else {
+ /*
+ * Unlink from the list, m is on its own
+ */
+ m->m_nextpkt = NULL;
+ so_recv_data_stat(so, m, 0);
+ if (sbappendrecord(&so->so_rcv, m) != 0) {
+ needwakeup = 1;
+ } else {
+ /*
+ * We free or return the remaining
+ * mbufs in the list
+ */
+ m = nextpkt;
+ error = ENOBUFS;
+ OSIncrementAtomic64(
+ (SInt64 *)&kctlstat.kcs_enqueue_fullsock);
+ break;
+ }
+ }
+ }
+ if (needwakeup && (flags & CTL_DATA_NOWAKEUP) == 0) {
+ sorwakeup(so);
+ }
+
+done:
+ if (so != NULL) {
+ if (ctl_debug && error != 0 && (flags & CTL_DATA_CRIT)) {
+ printf("%s - crit data err %d len %d hiwat %d cc: %d\n",
+ __func__, error, len,
+ so->so_rcv.sb_hiwat, so->so_rcv.sb_cc);
+ }
+
+ socket_unlock(so, 1);
+ }
+ if (m_remain) {
+ *m_remain = m;
+
+ if (m != NULL && socket_debug && so != NULL &&
+ (so->so_options & SO_DEBUG)) {
+ struct mbuf *n;
+
+ printf("%s m_list %llx\n", __func__,
+ (uint64_t) VM_KERNEL_ADDRPERM(m_list));
+ for (n = m; n != NULL; n = n->m_nextpkt) {
+ printf(" remain %llx m_next %llx\n",
+ (uint64_t) VM_KERNEL_ADDRPERM(n),
+ (uint64_t) VM_KERNEL_ADDRPERM(n->m_next));
+ }
+ }
+ } else {
+ if (m != NULL) {
+ m_freem_list(m);
+ }
+ }
+ if (error != 0) {
+ OSIncrementAtomic64((SInt64 *)&kctlstat.kcs_enqueue_fail);
+ }
+ return error;
+}
+
+errno_t
+ctl_enqueuedata(void *kctlref, u_int32_t unit, void *data, size_t len,
+ u_int32_t flags)
+{
+ struct socket *so;
+ struct mbuf *m;
+ errno_t error = 0;
+ unsigned int num_needed;
+ struct mbuf *n;
+ size_t curlen = 0;
+ u_int32_t kctlflags;
+
+ so = kcb_find_socket(kctlref, unit, &kctlflags);
+ if (so == NULL) {
+ return EINVAL;
+ }
+
+ if (ctl_rcvbspace(so, len, kctlflags, flags) != 0) {
+ error = ENOBUFS;
+ OSIncrementAtomic64((SInt64 *)&kctlstat.kcs_enqueue_fullsock);
+ goto bye;
+ }
+
+ num_needed = 1;
+ m = m_allocpacket_internal(&num_needed, len, NULL, M_NOWAIT, 1, 0);
+ if (m == NULL) {
+ kctlstat.kcs_enqdata_mb_alloc_fail++;
+ if (ctl_debug) {
+ printf("%s: m_allocpacket_internal(%lu) failed\n",
+ __func__, len);
+ }
+ error = ENOMEM;
+ goto bye;
+ }
+
for (n = m; n != NULL; n = n->m_next) {
size_t mlen = mbuf_maxlen(n);
-
- if (mlen + curlen > len)
+
+ if (mlen + curlen > len) {
mlen = len - curlen;
+ }
n->m_len = mlen;
bcopy((char *)data + curlen, n->m_data, mlen);
curlen += mlen;
}
mbuf_pkthdr_setlen(m, curlen);
- if ((flags & CTL_DATA_EOR))
+ if ((flags & CTL_DATA_EOR)) {
m->m_flags |= M_EOR;
- if (sbappend(&so->so_rcv, m) && (flags & CTL_DATA_NOWAKEUP) == 0)
- sorwakeup(so);
+ }
+ so_recv_data_stat(so, m, 0);
+ if (sbappend(&so->so_rcv, m) != 0) {
+ if ((flags & CTL_DATA_NOWAKEUP) == 0) {
+ sorwakeup(so);
+ }
+ } else {
+ kctlstat.kcs_enqdata_sbappend_fail++;
+ error = ENOBUFS;
+ OSIncrementAtomic64((SInt64 *)&kctlstat.kcs_enqueue_fullsock);
+ }
+
bye:
+ if (ctl_debug && error != 0 && (flags & CTL_DATA_CRIT)) {
+ printf("%s - crit data err %d len %d hiwat %d cc: %d\n",
+ __func__, error, (int)len,
+ so->so_rcv.sb_hiwat, so->so_rcv.sb_cc);
+ }
+
socket_unlock(so, 1);
+ if (error != 0) {
+ OSIncrementAtomic64((SInt64 *)&kctlstat.kcs_enqueue_fail);
+ }
return error;
}
+errno_t
+ctl_getenqueuepacketcount(kern_ctl_ref kctlref, u_int32_t unit, u_int32_t *pcnt)
+{
+ struct socket *so;
+ u_int32_t cnt;
+ struct mbuf *m1;
+
+ if (pcnt == NULL) {
+ return EINVAL;
+ }
+
+ so = kcb_find_socket(kctlref, unit, NULL);
+ if (so == NULL) {
+ return EINVAL;
+ }
+
+ cnt = 0;
+ m1 = so->so_rcv.sb_mb;
+ while (m1 != NULL) {
+ if (m1->m_type == MT_DATA ||
+ m1->m_type == MT_HEADER ||
+ m1->m_type == MT_OOBDATA) {
+ cnt += 1;
+ }
+ m1 = m1->m_nextpkt;
+ }
+ *pcnt = cnt;
+
+ socket_unlock(so, 1);
-errno_t
+ return 0;
+}
+
+errno_t
ctl_getenqueuespace(kern_ctl_ref kctlref, u_int32_t unit, size_t *space)
{
- struct ctl_cb *kcb;
- struct kctl *kctl = (struct kctl *)kctlref;
- struct socket *so;
-
- if (kctlref == NULL || space == NULL)
+ struct socket *so;
+ long avail;
+
+ if (space == NULL) {
return EINVAL;
-
- kcb = kcb_find(kctl, unit);
- if (kcb == NULL)
+ }
+
+ so = kcb_find_socket(kctlref, unit, NULL);
+ if (so == NULL) {
+ return EINVAL;
+ }
+
+ avail = sbspace(&so->so_rcv);
+ *space = (avail < 0) ? 0 : avail;
+ socket_unlock(so, 1);
+
+ return 0;
+}
+
+errno_t
+ctl_getenqueuereadable(kern_ctl_ref kctlref, u_int32_t unit,
+ u_int32_t *difference)
+{
+ struct socket *so;
+
+ if (difference == NULL) {
return EINVAL;
-
- so = (struct socket *)kcb->so;
- if (so == NULL)
+ }
+
+ so = kcb_find_socket(kctlref, unit, NULL);
+ if (so == NULL) {
return EINVAL;
-
- socket_lock(so, 1);
- *space = sbspace(&so->so_rcv);
+ }
+
+ if (so->so_rcv.sb_cc >= so->so_rcv.sb_lowat) {
+ *difference = 0;
+ } else {
+ *difference = (so->so_rcv.sb_lowat - so->so_rcv.sb_cc);
+ }
socket_unlock(so, 1);
return 0;
static int
ctl_ctloutput(struct socket *so, struct sockopt *sopt)
{
- struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
- struct kctl *kctl;
- int error = 0;
- void *data;
- size_t len;
-
+ struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
+ struct kctl *kctl;
+ int error = 0;
+ void *data = NULL;
+ size_t len;
+
if (sopt->sopt_level != SYSPROTO_CONTROL) {
- return(EINVAL);
- }
-
- if (kcb == NULL) /* sanity check */
- return(ENOTCONN);
-
- if ((kctl = kcb->kctl) == NULL)
- return(EINVAL);
-
+ return EINVAL;
+ }
+
+ if (kcb == NULL) { /* sanity check */
+ return ENOTCONN;
+ }
+
+ if ((kctl = kcb->kctl) == NULL) {
+ return EINVAL;
+ }
+
+ lck_mtx_t *mtx_held = socket_getlock(so, PR_F_WILLUNLOCK);
+ ctl_kcb_increment_use_count(kcb, mtx_held);
+
switch (sopt->sopt_dir) {
- case SOPT_SET:
- if (kctl->setopt == NULL)
- return(ENOTSUP);
- MALLOC(data, void *, sopt->sopt_valsize, M_TEMP, M_WAITOK);
- if (data == NULL)
- return(ENOMEM);
- error = sooptcopyin(sopt, data, sopt->sopt_valsize, sopt->sopt_valsize);
- if (error == 0) {
- socket_unlock(so, 0);
- error = (*kctl->setopt)(kcb->kctl, kcb->unit, kcb->userdata, sopt->sopt_name,
- data, sopt->sopt_valsize);
- socket_lock(so, 0);
+ case SOPT_SET:
+ if (kctl->setopt == NULL) {
+ error = ENOTSUP;
+ goto out;
+ }
+ if (sopt->sopt_valsize != 0) {
+ MALLOC(data, void *, sopt->sopt_valsize, M_TEMP,
+ M_WAITOK | M_ZERO);
+ if (data == NULL) {
+ error = ENOMEM;
+ goto out;
}
+ error = sooptcopyin(sopt, data,
+ sopt->sopt_valsize, sopt->sopt_valsize);
+ }
+ if (error == 0) {
+ socket_unlock(so, 0);
+ error = (*kctl->setopt)(kctl->kctlref,
+ kcb->sac.sc_unit, kcb->userdata, sopt->sopt_name,
+ data, sopt->sopt_valsize);
+ socket_lock(so, 0);
+ }
+
+ if (data != NULL) {
FREE(data, M_TEMP);
- break;
-
- case SOPT_GET:
- if (kctl->getopt == NULL)
- return(ENOTSUP);
- data = NULL;
- if (sopt->sopt_valsize && sopt->sopt_val) {
- MALLOC(data, void *, sopt->sopt_valsize, M_TEMP, M_WAITOK);
- if (data == NULL)
- return(ENOMEM);
- /* 4108337 - copy in data for get socket option */
- error = sooptcopyin(sopt, data, sopt->sopt_valsize, sopt->sopt_valsize);
+ }
+ break;
+
+ case SOPT_GET:
+ if (kctl->getopt == NULL) {
+ error = ENOTSUP;
+ goto out;
+ }
+
+ if (sopt->sopt_valsize && sopt->sopt_val) {
+ MALLOC(data, void *, sopt->sopt_valsize, M_TEMP,
+ M_WAITOK | M_ZERO);
+ if (data == NULL) {
+ error = ENOMEM;
+ goto out;
}
+ /*
+ * 4108337 - copy user data in case the
+ * kernel control needs it
+ */
+ error = sooptcopyin(sopt, data,
+ sopt->sopt_valsize, sopt->sopt_valsize);
+ }
+
+ if (error == 0) {
len = sopt->sopt_valsize;
socket_unlock(so, 0);
- error = (*kctl->getopt)(kcb->kctl, kcb->unit, kcb->userdata, sopt->sopt_name,
- data, &len);
- socket_lock(so, 0);
+ error = (*kctl->getopt)(kctl->kctlref, kcb->sac.sc_unit,
+ kcb->userdata, sopt->sopt_name,
+ data, &len);
+ if (data != NULL && len > sopt->sopt_valsize) {
+ panic_plain("ctl_ctloutput: ctl %s returned "
+ "len (%lu) > sopt_valsize (%lu)\n",
+ kcb->kctl->name, len,
+ sopt->sopt_valsize);
+ }
+ socket_lock(so, 0);
if (error == 0) {
- if (data != NULL)
+ if (data != NULL) {
error = sooptcopyout(sopt, data, len);
- else
+ } else {
sopt->sopt_valsize = len;
+ }
}
- if (data != NULL)
- FREE(data, M_TEMP);
+ }
+ if (data != NULL) {
+ FREE(data, M_TEMP);
+ }
+ break;
+ }
+
+out:
+ clt_kcb_decrement_use_count(kcb);
+ return error;
+}
+
+static int
+ctl_ioctl(struct socket *so, u_long cmd, caddr_t data,
+ struct ifnet *ifp, struct proc *p)
+{
+#pragma unused(so, ifp, p)
+ int error = ENOTSUP;
+
+ switch (cmd) {
+ /* get the number of controllers */
+ case CTLIOCGCOUNT: {
+ struct kctl *kctl;
+ u_int32_t n = 0;
+
+ lck_mtx_lock(ctl_mtx);
+ TAILQ_FOREACH(kctl, &ctl_head, next)
+ n++;
+ lck_mtx_unlock(ctl_mtx);
+
+ bcopy(&n, data, sizeof(n));
+ error = 0;
+ break;
+ }
+ case CTLIOCGINFO: {
+ struct ctl_info ctl_info;
+ struct kctl *kctl = 0;
+ size_t name_len;
+
+ bcopy(data, &ctl_info, sizeof(ctl_info));
+ name_len = strnlen(ctl_info.ctl_name, MAX_KCTL_NAME);
+
+ if (name_len == 0 || name_len + 1 > MAX_KCTL_NAME) {
+ error = EINVAL;
+ break;
+ }
+ lck_mtx_lock(ctl_mtx);
+ kctl = ctl_find_by_name(ctl_info.ctl_name);
+ lck_mtx_unlock(ctl_mtx);
+ if (kctl == 0) {
+ error = ENOENT;
+ break;
+ }
+ ctl_info.ctl_id = kctl->id;
+ bcopy(&ctl_info, data, sizeof(ctl_info));
+ error = 0;
+ break;
+ }
+
+ /* add controls to get list of NKEs */
+ }
+
+ return error;
+}
+
+static void
+kctl_tbl_grow()
+{
+ struct kctl **new_table;
+ uintptr_t new_size;
+
+ lck_mtx_assert(ctl_mtx, LCK_MTX_ASSERT_OWNED);
+
+ if (kctl_tbl_growing) {
+ /* Another thread is allocating */
+ kctl_tbl_growing_waiting++;
+
+ do {
+ (void) msleep((caddr_t) &kctl_tbl_growing, ctl_mtx,
+ PSOCK | PCATCH, "kctl_tbl_growing", 0);
+ } while (kctl_tbl_growing);
+ kctl_tbl_growing_waiting--;
+ }
+ /* Another thread grew the table */
+ if (kctl_table != NULL && kctl_tbl_count < kctl_tbl_size) {
+ return;
+ }
+
+ /* Verify we have a sane size */
+ if (kctl_tbl_size + KCTL_TBL_INC >= UINT16_MAX) {
+ kctlstat.kcs_tbl_size_too_big++;
+ if (ctl_debug) {
+ printf("%s kctl_tbl_size %lu too big\n",
+ __func__, kctl_tbl_size);
+ }
+ return;
+ }
+ kctl_tbl_growing = 1;
+
+ new_size = kctl_tbl_size + KCTL_TBL_INC;
+
+ lck_mtx_unlock(ctl_mtx);
+ new_table = _MALLOC(sizeof(struct kctl *) * new_size,
+ M_TEMP, M_WAIT | M_ZERO);
+ lck_mtx_lock(ctl_mtx);
+
+ if (new_table != NULL) {
+ if (kctl_table != NULL) {
+ bcopy(kctl_table, new_table,
+ kctl_tbl_size * sizeof(struct kctl *));
+
+ _FREE(kctl_table, M_TEMP);
+ }
+ kctl_table = new_table;
+ kctl_tbl_size = new_size;
+ }
+
+ kctl_tbl_growing = 0;
+
+ if (kctl_tbl_growing_waiting) {
+ wakeup(&kctl_tbl_growing);
+ }
+}
+
+#define KCTLREF_INDEX_MASK 0x0000FFFF
+#define KCTLREF_GENCNT_MASK 0xFFFF0000
+#define KCTLREF_GENCNT_SHIFT 16
+
+static kern_ctl_ref
+kctl_make_ref(struct kctl *kctl)
+{
+ uintptr_t i;
+
+ lck_mtx_assert(ctl_mtx, LCK_MTX_ASSERT_OWNED);
+
+ if (kctl_tbl_count >= kctl_tbl_size) {
+ kctl_tbl_grow();
+ }
+
+ kctl->kctlref = NULL;
+ for (i = 0; i < kctl_tbl_size; i++) {
+ if (kctl_table[i] == NULL) {
+ uintptr_t ref;
+
+ /*
+ * Reference is index plus one
+ */
+ kctl_ref_gencnt += 1;
+
+ /*
+ * Add generation count as salt to reference to prevent
+ * use after deregister
+ */
+ ref = ((kctl_ref_gencnt << KCTLREF_GENCNT_SHIFT) &
+ KCTLREF_GENCNT_MASK) +
+ ((i + 1) & KCTLREF_INDEX_MASK);
+
+ kctl->kctlref = (void *)(ref);
+ kctl_table[i] = kctl;
+ kctl_tbl_count++;
break;
+ }
}
- return error;
+
+ if (kctl->kctlref == NULL) {
+ panic("%s no space in table", __func__);
+ }
+
+ if (ctl_debug > 0) {
+ printf("%s %p for %p\n",
+ __func__, kctl->kctlref, kctl);
+ }
+
+ return kctl->kctlref;
}
-static int
-ctl_ioctl(__unused struct socket *so, u_long cmd, caddr_t data,
- __unused struct ifnet *ifp, __unused struct proc *p)
+static void
+kctl_delete_ref(kern_ctl_ref kctlref)
{
- int error = ENOTSUP;
-
- switch (cmd) {
- /* get the number of controllers */
- case CTLIOCGCOUNT: {
- struct kctl *kctl;
- int n = 0;
+ /*
+ * Reference is index plus one
+ */
+ uintptr_t i = (((uintptr_t)kctlref) & KCTLREF_INDEX_MASK) - 1;
- lck_mtx_lock(ctl_mtx);
- TAILQ_FOREACH(kctl, &ctl_head, next)
- n++;
- lck_mtx_unlock(ctl_mtx);
+ lck_mtx_assert(ctl_mtx, LCK_MTX_ASSERT_OWNED);
- *(u_int32_t *)data = n;
- error = 0;
- break;
- }
- case CTLIOCGINFO: {
- struct ctl_info *ctl_info = (struct ctl_info *)data;
- struct kctl *kctl = 0;
- size_t name_len = strlen(ctl_info->ctl_name);
-
- if (name_len == 0 || name_len + 1 > MAX_KCTL_NAME) {
- error = EINVAL;
- break;
- }
- lck_mtx_lock(ctl_mtx);
- kctl = ctl_find_by_name(ctl_info->ctl_name);
- lck_mtx_unlock(ctl_mtx);
- if (kctl == 0) {
- error = ENOENT;
- break;
- }
- ctl_info->ctl_id = kctl->id;
- error = 0;
- break;
+ if (i < kctl_tbl_size) {
+ struct kctl *kctl = kctl_table[i];
+
+ if (kctl->kctlref == kctlref) {
+ kctl_table[i] = NULL;
+ kctl_tbl_count--;
+ } else {
+ kctlstat.kcs_bad_kctlref++;
}
-
- /* add controls to get list of NKEs */
-
+ } else {
+ kctlstat.kcs_bad_kctlref++;
}
-
- return error;
+}
+
+static struct kctl *
+kctl_from_ref(kern_ctl_ref kctlref)
+{
+ /*
+ * Reference is index plus one
+ */
+ uintptr_t i = (((uintptr_t)kctlref) & KCTLREF_INDEX_MASK) - 1;
+ struct kctl *kctl = NULL;
+
+ lck_mtx_assert(ctl_mtx, LCK_MTX_ASSERT_OWNED);
+
+ if (i >= kctl_tbl_size) {
+ kctlstat.kcs_bad_kctlref++;
+ return NULL;
+ }
+ kctl = kctl_table[i];
+ if (kctl->kctlref != kctlref) {
+ kctlstat.kcs_bad_kctlref++;
+ return NULL;
+ }
+ return kctl;
}
/*
*/
errno_t
ctl_register(struct kern_ctl_reg *userkctl, kern_ctl_ref *kctlref)
-{
- struct kctl *kctl = 0;
- u_int32_t id = -1;
- u_int32_t n;
- size_t name_len;
-
- if (userkctl == NULL) /* sanity check */
- return(EINVAL);
- if (userkctl->ctl_connect == NULL)
- return(EINVAL);
+{
+ struct kctl *kctl = NULL;
+ struct kctl *kctl_next = NULL;
+ u_int32_t id = 1;
+ size_t name_len;
+ int is_extended = 0;
+
+ if (userkctl == NULL) { /* sanity check */
+ return EINVAL;
+ }
+ if (userkctl->ctl_connect == NULL) {
+ return EINVAL;
+ }
name_len = strlen(userkctl->ctl_name);
- if (name_len == 0 || name_len + 1 > MAX_KCTL_NAME)
- return(EINVAL);
-
+ if (name_len == 0 || name_len + 1 > MAX_KCTL_NAME) {
+ return EINVAL;
+ }
+
MALLOC(kctl, struct kctl *, sizeof(*kctl), M_TEMP, M_WAITOK);
- if (kctl == NULL)
- return(ENOMEM);
+ if (kctl == NULL) {
+ return ENOMEM;
+ }
bzero((char *)kctl, sizeof(*kctl));
-
+
lck_mtx_lock(ctl_mtx);
-
- if ((userkctl->ctl_flags & CTL_FLAG_REG_ID_UNIT) == 0) {
+
+ if (kctl_make_ref(kctl) == NULL) {
+ lck_mtx_unlock(ctl_mtx);
+ FREE(kctl, M_TEMP);
+ return ENOMEM;
+ }
+
+ /*
+ * Kernel Control IDs
+ *
+ * CTL_FLAG_REG_ID_UNIT indicates the control ID and unit number are
+ * static. If they do not exist, add them to the list in order. If the
+ * flag is not set, we must find a new unique value. We assume the
+ * list is in order. We find the last item in the list and add one. If
+ * this leads to wrapping the id around, we start at the front of the
+ * list and look for a gap.
+ */
+
+ if ((userkctl->ctl_flags & CTL_FLAG_REG_ID_UNIT) == 0) {
+ /* Must dynamically assign an unused ID */
+
+ /* Verify the same name isn't already registered */
if (ctl_find_by_name(userkctl->ctl_name) != NULL) {
+ kctl_delete_ref(kctl->kctlref);
lck_mtx_unlock(ctl_mtx);
FREE(kctl, M_TEMP);
- return(EEXIST);
+ return EEXIST;
}
- for (n = 0, id = ctl_last_id + 1; n < ctl_max; id++, n++) {
+
+ /* Start with 1 in case the list is empty */
+ id = 1;
+ kctl_next = TAILQ_LAST(&ctl_head, kctl_list);
+
+ if (kctl_next != NULL) {
+ /* List was not empty, add one to the last item */
+ id = kctl_next->id + 1;
+ kctl_next = NULL;
+
+ /*
+ * If this wrapped the id number, start looking at
+ * the front of the list for an unused id.
+ */
if (id == 0) {
- n--;
- continue;
+ /* Find the next unused ID */
+ id = 1;
+
+ TAILQ_FOREACH(kctl_next, &ctl_head, next) {
+ if (kctl_next->id > id) {
+ /* We found a gap */
+ break;
+ }
+
+ id = kctl_next->id + 1;
+ }
}
- if (ctl_find_by_id(id) == 0)
- break;
- }
- if (id == ctl_max) {
- lck_mtx_unlock(ctl_mtx);
- FREE(kctl, M_TEMP);
- return(ENOBUFS);
}
- userkctl->ctl_id =id;
+
+ userkctl->ctl_id = id;
kctl->id = id;
kctl->reg_unit = -1;
} else {
- if (ctl_find_by_id_unit(userkctl->ctl_id, userkctl->ctl_unit) != NULL) {
+ TAILQ_FOREACH(kctl_next, &ctl_head, next) {
+ if (kctl_next->id > userkctl->ctl_id) {
+ break;
+ }
+ }
+
+ if (ctl_find_by_id_unit(userkctl->ctl_id, userkctl->ctl_unit)) {
+ kctl_delete_ref(kctl->kctlref);
lck_mtx_unlock(ctl_mtx);
FREE(kctl, M_TEMP);
- return(EEXIST);
+ return EEXIST;
}
kctl->id = userkctl->ctl_id;
kctl->reg_unit = userkctl->ctl_unit;
}
- strcpy(kctl->name, userkctl->ctl_name);
- kctl->flags = userkctl->ctl_flags;
- /* Let the caller know the default send and receive sizes */
- if (userkctl->ctl_sendsize == 0)
- userkctl->ctl_sendsize = CTL_SENDSIZE;
- kctl->sendbufsize = userkctl->ctl_sendsize;
+ is_extended = (userkctl->ctl_flags & CTL_FLAG_REG_EXTENDED);
+
+ strlcpy(kctl->name, userkctl->ctl_name, MAX_KCTL_NAME);
+ kctl->flags = userkctl->ctl_flags;
- if (userkctl->ctl_recvsize == 0)
- userkctl->ctl_recvsize = CTL_RECVSIZE;
- kctl->recvbufsize = userkctl->ctl_recvsize;
+ /*
+ * Let the caller know the default send and receive sizes
+ */
+ if (userkctl->ctl_sendsize == 0) {
+ kctl->sendbufsize = CTL_SENDSIZE;
+ userkctl->ctl_sendsize = kctl->sendbufsize;
+ } else {
+ kctl->sendbufsize = userkctl->ctl_sendsize;
+ }
+ if (userkctl->ctl_recvsize == 0) {
+ kctl->recvbufsize = CTL_RECVSIZE;
+ userkctl->ctl_recvsize = kctl->recvbufsize;
+ } else {
+ kctl->recvbufsize = userkctl->ctl_recvsize;
+ }
+ kctl->bind = userkctl->ctl_bind;
kctl->connect = userkctl->ctl_connect;
kctl->disconnect = userkctl->ctl_disconnect;
kctl->send = userkctl->ctl_send;
kctl->setopt = userkctl->ctl_setopt;
kctl->getopt = userkctl->ctl_getopt;
-
+ if (is_extended) {
+ kctl->rcvd = userkctl->ctl_rcvd;
+ kctl->send_list = userkctl->ctl_send_list;
+ }
+
TAILQ_INIT(&kctl->kcb_head);
-
- TAILQ_INSERT_TAIL(&ctl_head, kctl, next);
- ctl_max++;
-
+
+ if (kctl_next) {
+ TAILQ_INSERT_BEFORE(kctl_next, kctl, next);
+ } else {
+ TAILQ_INSERT_TAIL(&ctl_head, kctl, next);
+ }
+
+ kctlstat.kcs_reg_count++;
+ kctlstat.kcs_gencnt++;
+
lck_mtx_unlock(ctl_mtx);
-
- *kctlref = kctl;
-
+
+ *kctlref = kctl->kctlref;
+
ctl_post_msg(KEV_CTL_REGISTERED, kctl->id);
- return(0);
+ return 0;
}
errno_t
ctl_deregister(void *kctlref)
-{
- struct kctl *kctl;
-
- if (kctlref == NULL) /* sanity check */
- return(EINVAL);
-
- lck_mtx_lock(ctl_mtx);
- TAILQ_FOREACH(kctl, &ctl_head, next) {
- if (kctl == (struct kctl *)kctlref)
- break;
- }
- if (kctl != (struct kctl *)kctlref) {
- lck_mtx_unlock(ctl_mtx);
- return EINVAL;
- }
+{
+ struct kctl *kctl;
+
+ lck_mtx_lock(ctl_mtx);
+ if ((kctl = kctl_from_ref(kctlref)) == NULL) {
+ kctlstat.kcs_bad_kctlref++;
+ lck_mtx_unlock(ctl_mtx);
+ if (ctl_debug != 0) {
+ printf("%s invalid kctlref %p\n",
+ __func__, kctlref);
+ }
+ return EINVAL;
+ }
+
if (!TAILQ_EMPTY(&kctl->kcb_head)) {
- lck_mtx_unlock(ctl_mtx);
+ lck_mtx_unlock(ctl_mtx);
return EBUSY;
}
- TAILQ_REMOVE(&ctl_head, kctl, next);
- ctl_max--;
+ TAILQ_REMOVE(&ctl_head, kctl, next);
- lck_mtx_unlock(ctl_mtx);
-
- ctl_post_msg(KEV_CTL_DEREGISTERED, kctl->id);
- FREE(kctl, M_TEMP);
- return(0);
-}
-
-/*
- * Must be called with global lock taked
- */
-static struct kctl *
-ctl_find_by_id(u_int32_t id)
-{
- struct kctl *kctl;
+ kctlstat.kcs_reg_count--;
+ kctlstat.kcs_gencnt++;
- TAILQ_FOREACH(kctl, &ctl_head, next)
- if (kctl->id == id)
- return kctl;
+ kctl_delete_ref(kctl->kctlref);
+ lck_mtx_unlock(ctl_mtx);
- return NULL;
+ ctl_post_msg(KEV_CTL_DEREGISTERED, kctl->id);
+ FREE(kctl, M_TEMP);
+ return 0;
}
/*
*/
static struct kctl *
ctl_find_by_name(const char *name)
-{
- struct kctl *kctl;
+{
+ struct kctl *kctl;
+
+ lck_mtx_assert(ctl_mtx, LCK_MTX_ASSERT_OWNED);
+
+ TAILQ_FOREACH(kctl, &ctl_head, next)
+ if (strncmp(kctl->name, name, sizeof(kctl->name)) == 0) {
+ return kctl;
+ }
+
+ return NULL;
+}
+
+u_int32_t
+ctl_id_by_name(const char *name)
+{
+ u_int32_t ctl_id = 0;
+ struct kctl *kctl;
+
+ lck_mtx_lock(ctl_mtx);
+ kctl = ctl_find_by_name(name);
+ if (kctl) {
+ ctl_id = kctl->id;
+ }
+ lck_mtx_unlock(ctl_mtx);
+
+ return ctl_id;
+}
+
+errno_t
+ctl_name_by_id(u_int32_t id, char *out_name, size_t maxsize)
+{
+ int found = 0;
+ struct kctl *kctl;
+
+ lck_mtx_lock(ctl_mtx);
+ TAILQ_FOREACH(kctl, &ctl_head, next) {
+ if (kctl->id == id) {
+ break;
+ }
+ }
- TAILQ_FOREACH(kctl, &ctl_head, next)
- if (strcmp(kctl->name, name) == 0)
- return kctl;
+ if (kctl) {
+ if (maxsize > MAX_KCTL_NAME) {
+ maxsize = MAX_KCTL_NAME;
+ }
+ strlcpy(out_name, kctl->name, maxsize);
+ found = 1;
+ }
+ lck_mtx_unlock(ctl_mtx);
- return NULL;
+ return found ? 0 : ENOENT;
}
/*
*/
static struct kctl *
ctl_find_by_id_unit(u_int32_t id, u_int32_t unit)
-{
- struct kctl *kctl;
+{
+ struct kctl *kctl;
+
+ lck_mtx_assert(ctl_mtx, LCK_MTX_ASSERT_OWNED);
- TAILQ_FOREACH(kctl, &ctl_head, next) {
- if (kctl->id == id && (kctl->flags & CTL_FLAG_REG_ID_UNIT) == 0)
- return kctl;
- else if (kctl->id == id && kctl->reg_unit == unit)
- return kctl;
- }
- return NULL;
+ TAILQ_FOREACH(kctl, &ctl_head, next) {
+ if (kctl->id == id && (kctl->flags & CTL_FLAG_REG_ID_UNIT) == 0) {
+ return kctl;
+ } else if (kctl->id == id && kctl->reg_unit == unit) {
+ return kctl;
+ }
+ }
+ return NULL;
}
/*
*/
static struct ctl_cb *
kcb_find(struct kctl *kctl, u_int32_t unit)
-{
- struct ctl_cb *kcb;
+{
+ struct ctl_cb *kcb;
+
+ lck_mtx_assert(ctl_mtx, LCK_MTX_ASSERT_OWNED);
- TAILQ_FOREACH(kcb, &kctl->kcb_head, next)
- if ((kcb->unit == unit))
- return kcb;
+ TAILQ_FOREACH(kcb, &kctl->kcb_head, next)
+ if (kcb->sac.sc_unit == unit) {
+ return kcb;
+ }
- return NULL;
+ return NULL;
}
-/*
- * Must be called witout lock
- */
-static void
-ctl_post_msg(u_long event_code, u_int32_t id)
+static struct socket *
+kcb_find_socket(kern_ctl_ref kctlref, u_int32_t unit, u_int32_t *kctlflags)
+{
+ struct socket *so = NULL;
+ struct ctl_cb *kcb;
+ void *lr_saved;
+ struct kctl *kctl;
+ int i;
+
+ lr_saved = __builtin_return_address(0);
+
+ lck_mtx_lock(ctl_mtx);
+ /*
+ * First validate the kctlref
+ */
+ if ((kctl = kctl_from_ref(kctlref)) == NULL) {
+ kctlstat.kcs_bad_kctlref++;
+ lck_mtx_unlock(ctl_mtx);
+ if (ctl_debug != 0) {
+ printf("%s invalid kctlref %p\n",
+ __func__, kctlref);
+ }
+ return NULL;
+ }
+
+ kcb = kcb_find(kctl, unit);
+ if (kcb == NULL || kcb->kctl != kctl || (so = kcb->so) == NULL) {
+ lck_mtx_unlock(ctl_mtx);
+ return NULL;
+ }
+ /*
+ * This prevents the socket from being closed
+ */
+ kcb->usecount++;
+ /*
+ * Respect lock ordering: socket before ctl_mtx
+ */
+ lck_mtx_unlock(ctl_mtx);
+
+ socket_lock(so, 1);
+ /*
+ * The socket lock history is more useful if we store
+ * the address of the caller.
+ */
+ i = (so->next_lock_lr + SO_LCKDBG_MAX - 1) % SO_LCKDBG_MAX;
+ so->lock_lr[i] = lr_saved;
+
+ lck_mtx_lock(ctl_mtx);
+
+ if ((kctl = kctl_from_ref(kctlref)) == NULL || kcb->kctl == NULL) {
+ lck_mtx_unlock(ctl_mtx);
+ socket_unlock(so, 1);
+ so = NULL;
+ lck_mtx_lock(ctl_mtx);
+ } else if (kctlflags != NULL) {
+ *kctlflags = kctl->flags;
+ }
+
+ kcb->usecount--;
+ if (kcb->usecount == 0) {
+ wakeup((event_t)&kcb->usecount);
+ }
+
+ lck_mtx_unlock(ctl_mtx);
+
+ return so;
+}
+
+static void
+ctl_post_msg(u_int32_t event_code, u_int32_t id)
{
- struct ctl_event_data ctl_ev_data;
- struct kev_msg ev_msg;
-
- ev_msg.vendor_code = KEV_VENDOR_APPLE;
-
- ev_msg.kev_class = KEV_SYSTEM_CLASS;
- ev_msg.kev_subclass = KEV_CTL_SUBCLASS;
- ev_msg.event_code = event_code;
-
- /* common nke subclass data */
- bzero(&ctl_ev_data, sizeof(ctl_ev_data));
- ctl_ev_data.ctl_id = id;
- ev_msg.dv[0].data_ptr = &ctl_ev_data;
- ev_msg.dv[0].data_length = sizeof(ctl_ev_data);
+ struct ctl_event_data ctl_ev_data;
+ struct kev_msg ev_msg;
+
+ lck_mtx_assert(ctl_mtx, LCK_MTX_ASSERT_NOTOWNED);
+
+ bzero(&ev_msg, sizeof(struct kev_msg));
+ ev_msg.vendor_code = KEV_VENDOR_APPLE;
+
+ ev_msg.kev_class = KEV_SYSTEM_CLASS;
+ ev_msg.kev_subclass = KEV_CTL_SUBCLASS;
+ ev_msg.event_code = event_code;
- ev_msg.dv[1].data_length = 0;
+ /* common nke subclass data */
+ bzero(&ctl_ev_data, sizeof(ctl_ev_data));
+ ctl_ev_data.ctl_id = id;
+ ev_msg.dv[0].data_ptr = &ctl_ev_data;
+ ev_msg.dv[0].data_length = sizeof(ctl_ev_data);
- kev_post_msg(&ev_msg);
+ ev_msg.dv[1].data_length = 0;
+
+ kev_post_msg(&ev_msg);
}
static int
-ctl_lock(struct socket *so, int refcount, int lr)
- {
- int lr_saved;
- if (lr == 0)
- lr_saved = (unsigned int) __builtin_return_address(0);
- else lr_saved = lr;
-
- if (so->so_pcb) {
+ctl_lock(struct socket *so, int refcount, void *lr)
+{
+ void *lr_saved;
+
+ if (lr == NULL) {
+ lr_saved = __builtin_return_address(0);
+ } else {
+ lr_saved = lr;
+ }
+
+ if (so->so_pcb != NULL) {
lck_mtx_lock(((struct ctl_cb *)so->so_pcb)->mtx);
- } else {
- panic("ctl_lock: so=%x NO PCB! lr=%x\n", so, lr_saved);
- lck_mtx_lock(so->so_proto->pr_domain->dom_mtx);
- }
-
- if (so->so_usecount < 0)
- panic("ctl_lock: so=%x so_pcb=%x lr=%x ref=%x\n",
- so, so->so_pcb, lr_saved, so->so_usecount);
-
- if (refcount)
+ } else {
+ panic("ctl_lock: so=%p NO PCB! lr=%p lrh= %s\n",
+ so, lr_saved, solockhistory_nr(so));
+ /* NOTREACHED */
+ }
+
+ if (so->so_usecount < 0) {
+ panic("ctl_lock: so=%p so_pcb=%p lr=%p ref=%x lrh= %s\n",
+ so, so->so_pcb, lr_saved, so->so_usecount,
+ solockhistory_nr(so));
+ /* NOTREACHED */
+ }
+
+ if (refcount) {
so->so_usecount++;
+ }
- so->lock_lr[so->next_lock_lr] = (void *)lr_saved;
- so->next_lock_lr = (so->next_lock_lr+1) % SO_LCKDBG_MAX;
- return (0);
+ so->lock_lr[so->next_lock_lr] = lr_saved;
+ so->next_lock_lr = (so->next_lock_lr + 1) % SO_LCKDBG_MAX;
+ return 0;
}
static int
-ctl_unlock(struct socket *so, int refcount, int lr)
-{
- int lr_saved;
- lck_mtx_t * mutex_held;
-
- if (lr == 0)
- lr_saved = (unsigned int) __builtin_return_address(0);
- else lr_saved = lr;
-
-#ifdef MORE_KCTLLOCK_DEBUG
- printf("ctl_unlock: so=%x sopcb=%x lock=%x ref=%x lr=%x\n",
- so, so->so_pcb, ((struct ctl_cb *)so->so_pcb)->mtx, so->so_usecount, lr_saved);
-#endif
- if (refcount)
+ctl_unlock(struct socket *so, int refcount, void *lr)
+{
+ void *lr_saved;
+ lck_mtx_t *mutex_held;
+
+ if (lr == NULL) {
+ lr_saved = __builtin_return_address(0);
+ } else {
+ lr_saved = lr;
+ }
+
+#if (MORE_KCTLLOCK_DEBUG && (DEVELOPMENT || DEBUG))
+ printf("ctl_unlock: so=%llx sopcb=%x lock=%llx ref=%u lr=%llx\n",
+ (uint64_t)VM_KERNEL_ADDRPERM(so),
+ (uint64_t)VM_KERNEL_ADDRPERM(so->so_pcb,
+ (uint64_t)VM_KERNEL_ADDRPERM(((struct ctl_cb *)so->so_pcb)->mtx),
+ so->so_usecount, (uint64_t)VM_KERNEL_ADDRPERM(lr_saved));
+#endif /* (MORE_KCTLLOCK_DEBUG && (DEVELOPMENT || DEBUG)) */
+ if (refcount) {
so->so_usecount--;
-
- if (so->so_usecount < 0)
- panic("ctl_unlock: so=%x usecount=%x\n", so, so->so_usecount);
+ }
+
+ if (so->so_usecount < 0) {
+ panic("ctl_unlock: so=%p usecount=%x lrh= %s\n",
+ so, so->so_usecount, solockhistory_nr(so));
+ /* NOTREACHED */
+ }
if (so->so_pcb == NULL) {
- panic("ctl_unlock: so=%x NO PCB usecount=%x lr=%x\n", so, so->so_usecount, lr_saved);
- mutex_held = so->so_proto->pr_domain->dom_mtx;
- } else {
- mutex_held = ((struct ctl_cb *)so->so_pcb)->mtx;
- }
- lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
- so->unlock_lr[so->next_unlock_lr] = (void *)lr_saved;
- so->next_unlock_lr = (so->next_unlock_lr+1) % SO_LCKDBG_MAX;
- lck_mtx_unlock(mutex_held);
-
- if (so->so_usecount == 0)
+ panic("ctl_unlock: so=%p NO PCB usecount=%x lr=%p lrh= %s\n",
+ so, so->so_usecount, (void *)lr_saved,
+ solockhistory_nr(so));
+ /* NOTREACHED */
+ }
+ mutex_held = ((struct ctl_cb *)so->so_pcb)->mtx;
+
+ lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
+ so->unlock_lr[so->next_unlock_lr] = lr_saved;
+ so->next_unlock_lr = (so->next_unlock_lr + 1) % SO_LCKDBG_MAX;
+ lck_mtx_unlock(mutex_held);
+
+ if (so->so_usecount == 0) {
ctl_sofreelastref(so);
-
- return (0);
+ }
+
+ return 0;
}
static lck_mtx_t *
-ctl_getlock(struct socket *so, __unused int locktype)
+ctl_getlock(struct socket *so, int flags)
{
- struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
-
- if (so->so_pcb) {
- if (so->so_usecount < 0)
- panic("ctl_getlock: so=%x usecount=%x\n", so, so->so_usecount);
- return(kcb->mtx);
+#pragma unused(flags)
+ struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
+
+ if (so->so_pcb) {
+ if (so->so_usecount < 0) {
+ panic("ctl_getlock: so=%p usecount=%x lrh= %s\n",
+ so, so->so_usecount, solockhistory_nr(so));
+ }
+ return kcb->mtx;
} else {
- panic("ctl_getlock: so=%x NULL so_pcb\n", so);
- return (so->so_proto->pr_domain->dom_mtx);
+ panic("ctl_getlock: so=%p NULL NO so_pcb %s\n",
+ so, solockhistory_nr(so));
+ return so->so_proto->pr_domain->dom_mtx;
+ }
+}
+
+__private_extern__ int
+kctl_reg_list SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg1, arg2)
+ int error = 0;
+ int n, i;
+ struct xsystmgen xsg;
+ void *buf = NULL;
+ struct kctl *kctl;
+ size_t item_size = ROUNDUP64(sizeof(struct xkctl_reg));
+
+ buf = _MALLOC(item_size, M_TEMP, M_WAITOK | M_ZERO);
+ if (buf == NULL) {
+ return ENOMEM;
+ }
+
+ lck_mtx_lock(ctl_mtx);
+
+ n = kctlstat.kcs_reg_count;
+
+ if (req->oldptr == USER_ADDR_NULL) {
+ req->oldidx = (n + n / 8) * sizeof(struct xkctl_reg);
+ goto done;
+ }
+ if (req->newptr != USER_ADDR_NULL) {
+ error = EPERM;
+ goto done;
+ }
+ bzero(&xsg, sizeof(xsg));
+ xsg.xg_len = sizeof(xsg);
+ xsg.xg_count = n;
+ xsg.xg_gen = kctlstat.kcs_gencnt;
+ xsg.xg_sogen = so_gencnt;
+ error = SYSCTL_OUT(req, &xsg, sizeof(xsg));
+ if (error) {
+ goto done;
+ }
+ /*
+ * We are done if there is no pcb
+ */
+ if (n == 0) {
+ goto done;
+ }
+
+ i = 0;
+ for (i = 0, kctl = TAILQ_FIRST(&ctl_head);
+ i < n && kctl != NULL;
+ i++, kctl = TAILQ_NEXT(kctl, next)) {
+ struct xkctl_reg *xkr = (struct xkctl_reg *)buf;
+ struct ctl_cb *kcb;
+ u_int32_t pcbcount = 0;
+
+ TAILQ_FOREACH(kcb, &kctl->kcb_head, next)
+ pcbcount++;
+
+ bzero(buf, item_size);
+
+ xkr->xkr_len = sizeof(struct xkctl_reg);
+ xkr->xkr_kind = XSO_KCREG;
+ xkr->xkr_id = kctl->id;
+ xkr->xkr_reg_unit = kctl->reg_unit;
+ xkr->xkr_flags = kctl->flags;
+ xkr->xkr_kctlref = (uint64_t)(kctl->kctlref);
+ xkr->xkr_recvbufsize = kctl->recvbufsize;
+ xkr->xkr_sendbufsize = kctl->sendbufsize;
+ xkr->xkr_lastunit = kctl->lastunit;
+ xkr->xkr_pcbcount = pcbcount;
+ xkr->xkr_connect = (uint64_t)VM_KERNEL_UNSLIDE(kctl->connect);
+ xkr->xkr_disconnect =
+ (uint64_t)VM_KERNEL_UNSLIDE(kctl->disconnect);
+ xkr->xkr_send = (uint64_t)VM_KERNEL_UNSLIDE(kctl->send);
+ xkr->xkr_send_list =
+ (uint64_t)VM_KERNEL_UNSLIDE(kctl->send_list);
+ xkr->xkr_setopt = (uint64_t)VM_KERNEL_UNSLIDE(kctl->setopt);
+ xkr->xkr_getopt = (uint64_t)VM_KERNEL_UNSLIDE(kctl->getopt);
+ xkr->xkr_rcvd = (uint64_t)VM_KERNEL_UNSLIDE(kctl->rcvd);
+ strlcpy(xkr->xkr_name, kctl->name, sizeof(xkr->xkr_name));
+
+ error = SYSCTL_OUT(req, buf, item_size);
+ }
+
+ if (error == 0) {
+ /*
+ * Give the user an updated idea of our state.
+ * If the generation differs from what we told
+ * her before, she knows that something happened
+ * while we were processing this request, and it
+ * might be necessary to retry.
+ */
+ bzero(&xsg, sizeof(xsg));
+ xsg.xg_len = sizeof(xsg);
+ xsg.xg_count = n;
+ xsg.xg_gen = kctlstat.kcs_gencnt;
+ xsg.xg_sogen = so_gencnt;
+ error = SYSCTL_OUT(req, &xsg, sizeof(xsg));
+ if (error) {
+ goto done;
+ }
+ }
+
+done:
+ lck_mtx_unlock(ctl_mtx);
+
+ if (buf != NULL) {
+ FREE(buf, M_TEMP);
+ }
+
+ return error;
+}
+
+__private_extern__ int
+kctl_pcblist SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg1, arg2)
+ int error = 0;
+ int n, i;
+ struct xsystmgen xsg;
+ void *buf = NULL;
+ struct kctl *kctl;
+ size_t item_size = ROUNDUP64(sizeof(struct xkctlpcb)) +
+ ROUNDUP64(sizeof(struct xsocket_n)) +
+ 2 * ROUNDUP64(sizeof(struct xsockbuf_n)) +
+ ROUNDUP64(sizeof(struct xsockstat_n));
+
+ buf = _MALLOC(item_size, M_TEMP, M_WAITOK | M_ZERO);
+ if (buf == NULL) {
+ return ENOMEM;
+ }
+
+ lck_mtx_lock(ctl_mtx);
+
+ n = kctlstat.kcs_pcbcount;
+
+ if (req->oldptr == USER_ADDR_NULL) {
+ req->oldidx = (n + n / 8) * item_size;
+ goto done;
+ }
+ if (req->newptr != USER_ADDR_NULL) {
+ error = EPERM;
+ goto done;
+ }
+ bzero(&xsg, sizeof(xsg));
+ xsg.xg_len = sizeof(xsg);
+ xsg.xg_count = n;
+ xsg.xg_gen = kctlstat.kcs_gencnt;
+ xsg.xg_sogen = so_gencnt;
+ error = SYSCTL_OUT(req, &xsg, sizeof(xsg));
+ if (error) {
+ goto done;
+ }
+ /*
+ * We are done if there is no pcb
+ */
+ if (n == 0) {
+ goto done;
+ }
+
+ i = 0;
+ for (i = 0, kctl = TAILQ_FIRST(&ctl_head);
+ i < n && kctl != NULL;
+ kctl = TAILQ_NEXT(kctl, next)) {
+ struct ctl_cb *kcb;
+
+ for (kcb = TAILQ_FIRST(&kctl->kcb_head);
+ i < n && kcb != NULL;
+ i++, kcb = TAILQ_NEXT(kcb, next)) {
+ struct xkctlpcb *xk = (struct xkctlpcb *)buf;
+ struct xsocket_n *xso = (struct xsocket_n *)
+ ADVANCE64(xk, sizeof(*xk));
+ struct xsockbuf_n *xsbrcv = (struct xsockbuf_n *)
+ ADVANCE64(xso, sizeof(*xso));
+ struct xsockbuf_n *xsbsnd = (struct xsockbuf_n *)
+ ADVANCE64(xsbrcv, sizeof(*xsbrcv));
+ struct xsockstat_n *xsostats = (struct xsockstat_n *)
+ ADVANCE64(xsbsnd, sizeof(*xsbsnd));
+
+ bzero(buf, item_size);
+
+ xk->xkp_len = sizeof(struct xkctlpcb);
+ xk->xkp_kind = XSO_KCB;
+ xk->xkp_unit = kcb->sac.sc_unit;
+ xk->xkp_kctpcb = (uint64_t)VM_KERNEL_ADDRPERM(kcb);
+ xk->xkp_kctlref = (uint64_t)VM_KERNEL_ADDRPERM(kctl);
+ xk->xkp_kctlid = kctl->id;
+ strlcpy(xk->xkp_kctlname, kctl->name,
+ sizeof(xk->xkp_kctlname));
+
+ sotoxsocket_n(kcb->so, xso);
+ sbtoxsockbuf_n(kcb->so ?
+ &kcb->so->so_rcv : NULL, xsbrcv);
+ sbtoxsockbuf_n(kcb->so ?
+ &kcb->so->so_snd : NULL, xsbsnd);
+ sbtoxsockstat_n(kcb->so, xsostats);
+
+ error = SYSCTL_OUT(req, buf, item_size);
+ }
+ }
+
+ if (error == 0) {
+ /*
+ * Give the user an updated idea of our state.
+ * If the generation differs from what we told
+ * her before, she knows that something happened
+ * while we were processing this request, and it
+ * might be necessary to retry.
+ */
+ bzero(&xsg, sizeof(xsg));
+ xsg.xg_len = sizeof(xsg);
+ xsg.xg_count = n;
+ xsg.xg_gen = kctlstat.kcs_gencnt;
+ xsg.xg_sogen = so_gencnt;
+ error = SYSCTL_OUT(req, &xsg, sizeof(xsg));
+ if (error) {
+ goto done;
+ }
+ }
+
+done:
+ lck_mtx_unlock(ctl_mtx);
+
+ return error;
+}
+
+int
+kctl_getstat SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg1, arg2)
+ int error = 0;
+
+ lck_mtx_lock(ctl_mtx);
+
+ if (req->newptr != USER_ADDR_NULL) {
+ error = EPERM;
+ goto done;
+ }
+ if (req->oldptr == USER_ADDR_NULL) {
+ req->oldidx = sizeof(struct kctlstat);
+ goto done;
+ }
+
+ error = SYSCTL_OUT(req, &kctlstat,
+ MIN(sizeof(struct kctlstat), req->oldlen));
+done:
+ lck_mtx_unlock(ctl_mtx);
+ return error;
+}
+
+void
+kctl_fill_socketinfo(struct socket *so, struct socket_info *si)
+{
+ struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
+ struct kern_ctl_info *kcsi =
+ &si->soi_proto.pri_kern_ctl;
+ struct kctl *kctl = kcb->kctl;
+
+ si->soi_kind = SOCKINFO_KERN_CTL;
+
+ if (kctl == 0) {
+ return;
}
+
+ kcsi->kcsi_id = kctl->id;
+ kcsi->kcsi_reg_unit = kctl->reg_unit;
+ kcsi->kcsi_flags = kctl->flags;
+ kcsi->kcsi_recvbufsize = kctl->recvbufsize;
+ kcsi->kcsi_sendbufsize = kctl->sendbufsize;
+ kcsi->kcsi_unit = kcb->sac.sc_unit;
+ strlcpy(kcsi->kcsi_name, kctl->name, MAX_KCTL_NAME);
}
projects / apple / xnu.git / blobdiff