#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 <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_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;
+};
+
+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;
+ u_int32_t unit;
+ u_int32_t usecount;
+};
+
#ifndef ROUNDUP64
#define ROUNDUP64(x) P2ROUNDUP((x), sizeof (u_int64_t))
#endif
/* all the controllers are chained */
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 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(struct kctl *, 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_int32_t event_code, u_int32_t id);
__private_extern__ int kctl_pcblist SYSCTL_HANDLER_ARGS;
__private_extern__ int kctl_getstat SYSCTL_HANDLER_ARGS;
-static int kctl_proto_count = (sizeof (kctlsw) / sizeof (struct protosw));
SYSCTL_NODE(_net_systm, OID_AUTO, kctl,
CTLFLAG_RW|CTLFLAG_LOCKED, 0, "Kernel control family");
SYSCTL_INT(_net_systm_kctl, OID_AUTO, debug,
CTLFLAG_RW | CTLFLAG_LOCKED, &ctl_debug, 0, "");
+#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.
*/
{
struct protosw *pr;
int i;
+ int kctl_proto_count = (sizeof (kctlsw) / sizeof (struct protosw));
VERIFY(!(dp->dom_flags & DOM_INITIALIZED));
VERIFY(dp == systemdomain);
return (0);
}
-
static int
ctl_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
{
error = soreserve(so, sendbufsize, recvbufsize);
if (error) {
- printf("%s - soreserve(%llx, %u, %u) error %d\n", __func__,
- (uint64_t)VM_KERNEL_ADDRPERM(so),
- sendbufsize, recvbufsize, 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);
socket_unlock(so, 0);
- error = (*kctl->connect)(kctl, &sa, &kcb->userdata);
+ error = (*kctl->connect)(kctl->kctlref, &sa, &kcb->userdata);
socket_lock(so, 0);
if (error)
goto end;
end:
if (error && 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);
- (*kctl->disconnect)(kctl, kcb->unit, kcb->userdata);
+ (*kctl->disconnect)(kctl->kctlref, kcb->unit, kcb->userdata);
socket_lock(so, 0);
}
done:
if (kctl && kctl->disconnect) {
socket_unlock(so, 0);
- (*kctl->disconnect)(kctl, kcb->unit, kcb->userdata);
+ (*kctl->disconnect)(kctl->kctlref, kcb->unit,
+ kcb->userdata);
socket_lock(so, 0);
}
if (kctl->rcvd) {
socket_unlock(so, 0);
- (*kctl->rcvd)(kctl, kcb->unit, kcb->userdata, flags);
+ (*kctl->rcvd)(kctl->kctlref, kcb->unit, kcb->userdata, flags);
socket_lock(so, 0);
}
if (error == 0 && kctl->send) {
so_tc_update_stats(m, so, m_get_service_class(m));
socket_unlock(so, 0);
- error = (*kctl->send)(kctl, kcb->unit, kcb->userdata, m, flags);
+ error = (*kctl->send)(kctl->kctlref, kcb->unit, kcb->userdata,
+ m, flags);
socket_lock(so, 0);
} else {
m_freem(m);
so_tc_update_stats(nxt, so, m_get_service_class(nxt));
socket_unlock(so, 0);
- error = (*kctl->send_list)(kctl, kcb->unit, kcb->userdata, m,
- flags);
+ error = (*kctl->send_list)(kctl->kctlref, kcb->unit,
+ kcb->userdata, m, flags);
socket_lock(so, 0);
} else if (error == 0 && kctl->send) {
while (m != NULL && error == 0) {
m->m_nextpkt = NULL;
so_tc_update_stats(m, so, m_get_service_class(m));
socket_unlock(so, 0);
- error = (*kctl->send)(kctl, kcb->unit, kcb->userdata, m,
- flags);
+ error = (*kctl->send)(kctl->kctlref, kcb->unit,
+ kcb->userdata, m, flags);
socket_lock(so, 0);
m = nextpkt;
}
}
static errno_t
-ctl_rcvbspace(struct kctl *kctl, struct socket *so, u_int32_t datasize,
- u_int32_t flags)
+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 ((kctl->flags & CTL_FLAG_REG_CRIT) == 0) {
+ 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;
+ /*
+ * Reserve 25% for critical messages
+ */
+ if (space < (sb->sb_hiwat >> 2) ||
+ space < datasize)
+ error = ENOBUFS;
+ else
+ error = 0;
} else {
u_int32_t autorcvbuf_max;
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\n",
- __func__, sb->sb_hiwat);
- error = 0;
+ printf("%s - grown to %d error %d\n",
+ __func__, sb->sb_hiwat, error);
} else {
error = ENOBUFS;
}
}
errno_t
-ctl_enqueuembuf(void *kctlref, u_int32_t unit, struct mbuf *m, u_int32_t flags)
+ctl_enqueuembuf(kern_ctl_ref kctlref, u_int32_t unit, struct mbuf *m,
+ u_int32_t flags)
{
struct socket *so;
errno_t error = 0;
- struct kctl *kctl = (struct kctl *)kctlref;
int len = m->m_pkthdr.len;
+ u_int32_t kctlflags;
- if (kctl == NULL)
- return (EINVAL);
-
- so = kcb_find_socket(kctl, unit);
-
- if (so == NULL)
+ so = kcb_find_socket(kctlref, unit, &kctlflags);
+ if (so == NULL) {
return (EINVAL);
+ }
- if (ctl_rcvbspace(kctl, so, len, flags) != 0) {
+ if (ctl_rcvbspace(so, len, kctlflags, flags) != 0) {
error = ENOBUFS;
OSIncrementAtomic64((SInt64 *)&kctlstat.kcs_enqueue_fullsock);
goto bye;
{
struct socket *so = NULL;
errno_t error = 0;
- struct kctl *kctl = (struct kctl *)kctlref;
struct mbuf *m, *nextpkt;
int needwakeup = 0;
int len;
+ u_int32_t kctlflags;
/*
* Need to point the beginning of the list in case of early exit
*/
m = m_list;
- if (kctl == NULL) {
+ /*
+ * 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 (kctl->flags & CTL_FLAG_REG_SOCK_STREAM) {
+
+ if (kctlflags & CTL_FLAG_REG_SOCK_STREAM) {
error = EOPNOTSUPP;
goto done;
}
error = EINVAL;
goto done;
}
- /*
- * kcb_find_socket takes the socket lock with a reference
- */
- so = kcb_find_socket(kctl, unit);
- if (so == NULL) {
- error = EINVAL;
- goto done;
- }
for (m = m_list; m != NULL; m = nextpkt) {
nextpkt = m->m_nextpkt;
- if (m->m_pkthdr.len == 0)
+ if (m->m_pkthdr.len == 0 && ctl_debug)
printf("%s: %llx m_pkthdr.len is 0",
__func__, (uint64_t)VM_KERNEL_ADDRPERM(m));
* so it's not reliable from a data standpoint
*/
len = m_space(m);
- if (ctl_rcvbspace(kctl, so, len, flags) != 0) {
+ if (ctl_rcvbspace(so, len, kctlflags, flags) != 0) {
error = ENOBUFS;
OSIncrementAtomic64(
(SInt64 *)&kctlstat.kcs_enqueue_fullsock);
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;
+ u_int32_t kctlflags;
- if (kctlref == NULL)
- return (EINVAL);
-
- so = kcb_find_socket(kctl, unit);
- if (so == NULL)
+ so = kcb_find_socket(kctlref, unit, &kctlflags);
+ if (so == NULL) {
return (EINVAL);
+ }
- if (ctl_rcvbspace(kctl, so, len, flags) != 0) {
+ 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) {
- printf("ctl_enqueuedata: m_allocpacket_internal(%lu) failed\n",
- len);
+ kctlstat.kcs_enqdata_mb_alloc_fail++;
+ if (ctl_debug)
+ printf("%s: m_allocpacket_internal(%lu) failed\n",
+ __func__, len);
error = ENOMEM;
goto bye;
}
if ((flags & CTL_DATA_NOWAKEUP) == 0)
sorwakeup(so);
} else {
+ kctlstat.kcs_enqdata_sbappend_fail++;
error = ENOBUFS;
OSIncrementAtomic64((SInt64 *)&kctlstat.kcs_enqueue_fullsock);
}
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);
+
+ return (0);
+}
errno_t
ctl_getenqueuespace(kern_ctl_ref kctlref, u_int32_t unit, size_t *space)
{
- struct kctl *kctl = (struct kctl *)kctlref;
struct socket *so;
long avail;
- if (kctlref == NULL || space == NULL)
+ if (space == NULL)
return (EINVAL);
- so = kcb_find_socket(kctl, unit);
- if (so == NULL)
+ so = kcb_find_socket(kctlref, unit, NULL);
+ if (so == NULL) {
return (EINVAL);
+ }
avail = sbspace(&so->so_rcv);
*space = (avail < 0) ? 0 : avail;
ctl_getenqueuereadable(kern_ctl_ref kctlref, u_int32_t unit,
u_int32_t *difference)
{
- struct kctl *kctl = (struct kctl *)kctlref;
struct socket *so;
- if (kctlref == NULL || difference == NULL)
+ if (difference == NULL)
return (EINVAL);
- so = kcb_find_socket(kctl, unit);
- if (so == NULL)
+ so = kcb_find_socket(kctlref, unit, NULL);
+ if (so == NULL) {
return (EINVAL);
+ }
if (so->so_rcv.sb_cc >= so->so_rcv.sb_lowat) {
*difference = 0;
if (data == NULL)
return (ENOMEM);
error = sooptcopyin(sopt, data,
- sopt->sopt_valsize,
- sopt->sopt_valsize);
+ 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);
+ error = (*kctl->setopt)(kctl->kctlref,
+ kcb->unit, kcb->userdata, sopt->sopt_name,
+ data, sopt->sopt_valsize);
socket_lock(so, 0);
}
FREE(data, M_TEMP);
}
len = sopt->sopt_valsize;
socket_unlock(so, 0);
- error = (*kctl->getopt)(kcb->kctl, kcb->unit,
+ error = (*kctl->getopt)(kctl->kctlref, kcb->unit,
kcb->userdata, sopt->sopt_name,
data, &len);
if (data != NULL && len > sopt->sopt_valsize)
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;
+ }
+ }
+
+ 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 void
+kctl_delete_ref(kern_ctl_ref kctlref)
+{
+ /*
+ * Reference is index plus one
+ */
+ uintptr_t i = (((uintptr_t)kctlref) & KCTLREF_INDEX_MASK) - 1;
+
+ lck_mtx_assert(ctl_mtx, LCK_MTX_ASSERT_OWNED);
+
+ 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++;
+ }
+ } else {
+ kctlstat.kcs_bad_kctlref++;
+ }
+}
+
+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);
+}
+
/*
* Register/unregister a NKE
*/
lck_mtx_lock(ctl_mtx);
+ if (kctl_make_ref(kctl) == NULL) {
+ lck_mtx_unlock(ctl_mtx);
+ FREE(kctl, M_TEMP);
+ return (ENOMEM);
+ }
+
/*
* Kernel Control IDs
*
/* 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);
}
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);
lck_mtx_unlock(ctl_mtx);
- *kctlref = kctl;
+ *kctlref = kctl->kctlref;
ctl_post_msg(KEV_CTL_REGISTERED, kctl->id);
return (0);
{
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) {
+ 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);
return (EBUSY);
kctlstat.kcs_reg_count--;
kctlstat.kcs_gencnt++;
+ kctl_delete_ref(kctl->kctlref);
lck_mtx_unlock(ctl_mtx);
ctl_post_msg(KEV_CTL_DEREGISTERED, kctl->id);
break;
}
- if (kctl && kctl->name) {
+ if (kctl) {
if (maxsize > MAX_KCTL_NAME)
maxsize = MAX_KCTL_NAME;
strlcpy(out_name, kctl->name, maxsize);
}
static struct socket *
-kcb_find_socket(struct kctl *kctl, u_int32_t unit)
+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);
- kcb = kcb_find(kctl, unit);
- if (kcb && kcb->kctl == kctl) {
- so = kcb->so;
- if (so) {
- kcb->usecount++;
- }
+ /*
+ * 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);
}
- lck_mtx_unlock(ctl_mtx);
- if (so == 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 (kcb->kctl == NULL) {
+
+ 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 {
- /*
- * The socket lock history is more useful if we store
- * the address of the caller.
- */
- int i = (so->next_lock_lr + SO_LCKDBG_MAX - 1) % SO_LCKDBG_MAX;
-
- so->lock_lr[i] = lr_saved;
+ } 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);
else
lr_saved = lr;
-#ifdef MORE_KCTLLOCK_DEBUG
+#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
+#endif /* (MORE_KCTLLOCK_DEBUG && (DEVELOPMENT || DEBUG)) */
if (refcount)
so->so_usecount--;
xkr->xkr_id = kctl->id;
xkr->xkr_reg_unit = kctl->reg_unit;
xkr->xkr_flags = kctl->flags;
- xkr->xkr_kctlref = (uint64_t)VM_KERNEL_ADDRPERM(kctl);
+ xkr->xkr_kctlref = (uint64_t)(kctl->kctlref);
xkr->xkr_recvbufsize = kctl->recvbufsize;
xkr->xkr_sendbufsize = kctl->sendbufsize;
xkr->xkr_lastunit = kctl->lastunit;
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->unit;
+ strlcpy(kcsi->kcsi_name, kctl->name, MAX_KCTL_NAME);
+}
projects / apple / xnu.git / blobdiff