*
* @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.
+ * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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. 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.
+ * 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_LICENSE_HEADER_END@
*/
*/
extern struct sysctl_oid *newsysctl_list[];
+extern struct sysctl_oid *machdep_sysctl_list[];
static void
int sl_locked;
} memlock;
+/*
+ * XXX this does not belong here
+ */
+static funnel_t *
+spl_kernel_funnel(void)
+{
+ funnel_t *cfunnel;
+
+ cfunnel = thread_funnel_get();
+ if (cfunnel != kernel_flock) {
+ if (cfunnel != NULL)
+ thread_funnel_set(cfunnel, FALSE);
+ thread_funnel_set(kernel_flock, TRUE);
+ }
+ return(cfunnel);
+}
+
+static void
+splx_kernel_funnel(funnel_t *saved)
+{
+ if (saved != kernel_flock) {
+ thread_funnel_set(kernel_flock, FALSE);
+ if (saved != NULL)
+ thread_funnel_set(saved, TRUE);
+ }
+}
+
static int sysctl_root SYSCTL_HANDLER_ARGS;
struct sysctl_oid_list sysctl__children; /* root list */
struct sysctl_oid *p;
struct sysctl_oid *q;
int n;
+ funnel_t *fnl;
+
+ fnl = spl_kernel_funnel();
/*
* If this oid has a number OID_AUTO, give it a number which
SLIST_INSERT_AFTER(q, oidp, oid_link);
else
SLIST_INSERT_HEAD(parent, oidp, oid_link);
+
+ splx_kernel_funnel(fnl);
}
void sysctl_unregister_oid(struct sysctl_oid *oidp)
{
+ funnel_t *fnl;
+
+ fnl = spl_kernel_funnel();
SLIST_REMOVE(oidp->oid_parent, oidp, sysctl_oid, oid_link);
+ splx_kernel_funnel(fnl);
}
/*
void sysctl_register_fixed()
{
- int i = 0;
+ int i;
-
- while (newsysctl_list[i]) {
-/* printf("Registering %d\n", i); */
- sysctl_register_oid(newsysctl_list[i++]);
+ for (i=0; newsysctl_list[i]; i++) {
+ sysctl_register_oid(newsysctl_list[i]);
+ }
+ for (i=0; machdep_sysctl_list[i]; i++) {
+ sysctl_register_oid(machdep_sysctl_list[i]);
}
}
return (error);
}
+/*
+ * Handle a quad, signed or unsigned. arg1 points to it.
+ */
+
+int
+sysctl_handle_quad SYSCTL_HANDLER_ARGS
+{
+ int error = 0;
+
+ if (!arg1)
+ return (EINVAL);
+ error = SYSCTL_OUT(req, arg1, sizeof(long long));
+
+ if (error || !req->newptr)
+ return (error);
+
+ error = SYSCTL_IN(req, arg1, sizeof(long long));
+ return (error);
+}
+
+/*
+ * Expose an int value as a quad.
+ *
+ * This interface allows us to support interfaces defined
+ * as using quad values while the implementation is still
+ * using ints.
+ */
+int
+sysctl_handle_int2quad SYSCTL_HANDLER_ARGS
+{
+ int error = 0;
+ long long val;
+ int newval;
+
+ if (!arg1)
+ return (EINVAL);
+ val = (long long)*(int *)arg1;
+ error = SYSCTL_OUT(req, &val, sizeof(long long));
+
+ if (error || !req->newptr)
+ return (error);
+
+ error = SYSCTL_IN(req, &val, sizeof(long long));
+ if (!error) {
+ /*
+ * Value must be representable; check by
+ * casting and then casting back.
+ */
+ newval = (int)val;
+ if ((long long)newval != val) {
+ error = ERANGE;
+ } else {
+ *(int *)arg1 = newval;
+ }
+ }
+ return (error);
+}
+
/*
* Handle our generic '\0' terminated 'C' string.
* Two cases:
/*
* Transfer functions to/from kernel space.
- * XXX: rather untested at this point
*/
static int
sysctl_old_kernel(struct sysctl_req *req, const void *p, size_t l)
i = l;
if (i > req->oldlen - req->oldidx)
i = req->oldlen - req->oldidx;
- if (i > 0) {
- error = copyout((void*)p, (char *)req->oldptr + req->oldidx, i);
- if (error)
- return error;
- }
+ if (i > 0)
+ bcopy((void*)p, (char *)req->oldptr + req->oldidx, i);
}
req->oldidx += l;
if (req->oldptr && i != l)
return 0;
if (req->newlen - req->newidx < l)
return (EINVAL);
- copyin((char *)req->newptr + req->newidx, p, l);
+ bcopy((char *)req->newptr + req->newidx, p, l);
req->newidx += l;
return (0);
}
int
-kernel_sysctl(struct proc *p, int *name, u_int namelen, void *old, size_t *oldlenp, void *new, size_t newlen, size_t *retval)
+kernel_sysctl(struct proc *p, int *name, u_int namelen, void *old, size_t *oldlenp, void *new, size_t newlen)
{
int error = 0;
struct sysctl_req req;
+ funnel_t *fnl;
+ /*
+ * Construct request.
+ */
bzero(&req, sizeof req);
-
req.p = p;
-
- if (oldlenp) {
+ if (oldlenp)
req.oldlen = *oldlenp;
- }
-
- if (old) {
+ if (old)
req.oldptr= old;
- }
-
if (newlen) {
req.newlen = newlen;
req.newptr = new;
}
-
req.oldfunc = sysctl_old_kernel;
req.newfunc = sysctl_new_kernel;
req.lock = 1;
+ /*
+ * Locking. Tree traversal always begins with the kernel funnel held.
+ */
+ fnl = spl_kernel_funnel();
+
/* XXX this should probably be done in a general way */
while (memlock.sl_lock) {
memlock.sl_want = 1;
}
memlock.sl_lock = 1;
+ /* make the request */
error = sysctl_root(0, name, namelen, &req);
+ /* unlock memory if required */
if (req.lock == 2)
vsunlock(req.oldptr, req.oldlen, B_WRITE);
wakeup((caddr_t)&memlock);
}
+ /*
+ * Undo locking.
+ */
+ splx_kernel_funnel(fnl);
+
if (error && error != ENOMEM)
return (error);
- if (retval) {
- if (req.oldptr && req.oldidx > req.oldlen)
- *retval = req.oldlen;
- else
- *retval = req.oldidx;
- }
+ if (oldlenp)
+ *oldlenp = req.oldidx;
+
return (error);
}
return (EPERM);
}
+ /*
+ * If we're inside the kernel, the OID must be marked as kernel-valid.
+ * XXX This mechanism for testing is bad.
+ */
+ if ((req->oldfunc == sysctl_old_kernel) && !(oid->oid_kind & CTLFLAG_KERN))
+ return(EPERM);
+
/* Most likely only root can write */
if (!(oid->oid_kind & CTLFLAG_ANYBODY) &&
req->newptr && req->p &&
}
return (error);
}
-#if 0
-
-#if COMPAT_43
-#include <sys/socket.h>
-#include <vm/vm_param.h>
-
-#define KINFO_PROC (0<<8)
-#define KINFO_RT (1<<8)
-#define KINFO_VNODE (2<<8)
-#define KINFO_FILE (3<<8)
-#define KINFO_METER (4<<8)
-#define KINFO_LOADAVG (5<<8)
-#define KINFO_CLOCKRATE (6<<8)
/* Non-standard BSDI extension - only present on their 4.3 net-2 releases */
#define KINFO_BSDI_SYSINFO (101<<8)
/*
- * XXX this is bloat, but I hope it's better here than on the potentially
- * limited kernel stack... -Peter
- */
-
-static struct {
- int bsdi_machine; /* "i386" on BSD/386 */
-/* ^^^ this is an offset to the string, relative to the struct start */
- char *pad0;
- long pad1;
- long pad2;
- long pad3;
- u_long pad4;
- u_long pad5;
- u_long pad6;
-
- int bsdi_ostype; /* "BSD/386" on BSD/386 */
- int bsdi_osrelease; /* "1.1" on BSD/386 */
- long pad7;
- long pad8;
- char *pad9;
-
- long pad10;
- long pad11;
- int pad12;
- long pad13;
- quad_t pad14;
- long pad15;
-
- struct timeval pad16;
- /* we dont set this, because BSDI's uname used gethostname() instead */
- int bsdi_hostname; /* hostname on BSD/386 */
-
- /* the actual string data is appended here */
-
-} bsdi_si;
-/*
- * this data is appended to the end of the bsdi_si structure during copyout.
- * The "char *" offsets are relative to the base of the bsdi_si struct.
- * This contains "FreeBSD\02.0-BUILT-nnnnnn\0i386\0", and these strings
- * should not exceed the length of the buffer here... (or else!! :-)
+ * Kernel versions of the userland sysctl helper functions.
+ *
+ * These allow sysctl to be used in the same fashion in both
+ * userland and the kernel.
+ *
+ * Note that some sysctl handlers use copyin/copyout, which
+ * may not work correctly.
*/
-static char bsdi_strings[80]; /* It had better be less than this! */
-
-#ifndef _SYS_SYSPROTO_H_
-struct getkerninfo_args {
- int op;
- char *where;
- size_t *size;
- int arg;
-};
-#endif
-int
-ogetkerninfo(struct proc *p, struct getkerninfo_args *uap)
+static int
+sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, size_t newlen)
{
- int error, name[6];
- size_t size;
-
- switch (uap->op & 0xff00) {
-
- case KINFO_RT:
- name[0] = CTL_NET;
- name[1] = PF_ROUTE;
- name[2] = 0;
- name[3] = (uap->op & 0xff0000) >> 16;
- name[4] = uap->op & 0xff;
- name[5] = uap->arg;
- error = userland_sysctl(p, name, 6, uap->where, uap->size,
- 0, 0, 0, &size);
- break;
-
- case KINFO_VNODE:
- name[0] = CTL_KERN;
- name[1] = KERN_VNODE;
- error = userland_sysctl(p, name, 2, uap->where, uap->size,
- 0, 0, 0, &size);
- break;
-
- case KINFO_PROC:
- name[0] = CTL_KERN;
- name[1] = KERN_PROC;
- name[2] = uap->op & 0xff;
- name[3] = uap->arg;
- error = userland_sysctl(p, name, 4, uap->where, uap->size,
- 0, 0, 0, &size);
- break;
-
- case KINFO_FILE:
- name[0] = CTL_KERN;
- name[1] = KERN_FILE;
- error = userland_sysctl(p, name, 2, uap->where, uap->size,
- 0, 0, 0, &size);
- break;
-
- case KINFO_METER:
- name[0] = CTL_VM;
- name[1] = VM_METER;
- error = userland_sysctl(p, name, 2, uap->where, uap->size,
- 0, 0, 0, &size);
- break;
-
- case KINFO_LOADAVG:
- name[0] = CTL_VM;
- name[1] = VM_LOADAVG;
- error = userland_sysctl(p, name, 2, uap->where, uap->size,
- 0, 0, 0, &size);
- break;
-
- case KINFO_CLOCKRATE:
- name[0] = CTL_KERN;
- name[1] = KERN_CLOCKRATE;
- error = userland_sysctl(p, name, 2, uap->where, uap->size,
- 0, 0, 0, &size);
- break;
-
- case KINFO_BSDI_SYSINFO: {
- /*
- * this is pretty crude, but it's just enough for uname()
- * from BSDI's 1.x libc to work.
- *
- * In particular, it doesn't return the same results when
- * the supplied buffer is too small. BSDI's version apparently
- * will return the amount copied, and set the *size to how
- * much was needed. The emulation framework here isn't capable
- * of that, so we just set both to the amount copied.
- * BSDI's 2.x product apparently fails with ENOMEM in this
- * scenario.
- */
-
- u_int needed;
- u_int left;
- char *s;
-
- bzero((char *)&bsdi_si, sizeof(bsdi_si));
- bzero(bsdi_strings, sizeof(bsdi_strings));
- s = bsdi_strings;
-
- bsdi_si.bsdi_ostype = (s - bsdi_strings) + sizeof(bsdi_si);
- strcpy(s, ostype);
- s += strlen(s) + 1;
-
- bsdi_si.bsdi_osrelease = (s - bsdi_strings) + sizeof(bsdi_si);
- strcpy(s, osrelease);
- s += strlen(s) + 1;
-
- bsdi_si.bsdi_machine = (s - bsdi_strings) + sizeof(bsdi_si);
- strcpy(s, machine);
- s += strlen(s) + 1;
-
- needed = sizeof(bsdi_si) + (s - bsdi_strings);
-
- if (uap->where == NULL) {
- /* process is asking how much buffer to supply.. */
- size = needed;
- error = 0;
- break;
- }
+ return(kernel_sysctl(current_proc(), name, namelen, oldp, oldlenp, newp, newlen));
+}
+static int
+sysctlnametomib(const char *name, int *mibp, size_t *sizep)
+{
+ int oid[2];
+ int error;
- /* if too much buffer supplied, trim it down */
- if (size > needed)
- size = needed;
+ /* magic service node */
+ oid[0] = 0;
+ oid[1] = 3;
- /* how much of the buffer is remaining */
- left = size;
+ /* look up OID for name */
+ *sizep *= sizeof(int);
+ error = sysctl(oid, 2, mibp, sizep, (void *)name, strlen(name));
+ *sizep /= sizeof(int);
+ return(error);
+}
- if ((error = copyout((char *)&bsdi_si, uap->where, left)) != 0)
- break;
+int
+sysctlbyname(const char *name, void *oldp, size_t *oldlenp, void *newp, size_t newlen)
+{
+ int oid[CTL_MAXNAME + 2];
+ int error;
+ size_t oidlen;
- /* is there any point in continuing? */
- if (left > sizeof(bsdi_si)) {
- left -= sizeof(bsdi_si);
- error = copyout(&bsdi_strings,
- uap->where + sizeof(bsdi_si), left);
- }
- break;
- }
+ /* look up the OID */
+ oidlen = CTL_MAXNAME;
+ error = sysctlnametomib(name, oid, &oidlen);
- default:
- return (EOPNOTSUPP);
- }
- if (error)
- return (error);
- p->p_retval[0] = size;
- if (uap->size)
- error = copyout((caddr_t)&size, (caddr_t)uap->size,
- sizeof(size));
- return (error);
+ /* now use the OID */
+ if (error == 0)
+ error = sysctl(oid, oidlen, oldp, oldlenp, newp, newlen);
+ return(error);
}
-#endif /* COMPAT_43 */
-#endif
projects / apple / xnu.git / blobdiff