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Diffstat (limited to 'sys/compat/linux/common/linux_sysctl.c')
-rw-r--r--sys/compat/linux/common/linux_sysctl.c362
1 files changed, 151 insertions, 211 deletions
diff --git a/sys/compat/linux/common/linux_sysctl.c b/sys/compat/linux/common/linux_sysctl.c
index c82262c7deb..9f4e7630e3f 100644
--- a/sys/compat/linux/common/linux_sysctl.c
+++ b/sys/compat/linux/common/linux_sysctl.c
@@ -1,11 +1,11 @@
-/* $NetBSD: linux_sysctl.c,v 1.10 2003/08/07 16:30:45 agc Exp $ */
+/* $NetBSD: linux_sysctl.c,v 1.11 2003/12/04 19:38:23 atatat Exp $ */
/*-
- * Copyright (c) 1982, 1986, 1989, 1993
- * The Regents of the University of California. All rights reserved.
+ * Copyright (c) 2003 The NetBSD Foundation, Inc.
+ * All rights reserved.
*
- * This code is derived from software contributed to Berkeley by
- * Mike Karels at Berkeley Software Design, Inc.
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Andrew Brown.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@@ -15,23 +15,25 @@
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
*
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)kern_sysctl.c 8.9 (Berkeley) 5/20/95
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
*/
/*
@@ -39,7 +41,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: linux_sysctl.c,v 1.10 2003/08/07 16:30:45 agc Exp $");
+__KERNEL_RCSID(0, "$NetBSD: linux_sysctl.c,v 1.11 2003/12/04 19:38:23 atatat Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -57,229 +59,167 @@ __KERNEL_RCSID(0, "$NetBSD: linux_sysctl.c,v 1.10 2003/08/07 16:30:45 agc Exp $"
#include <compat/linux/common/linux_sysctl.h>
#include <compat/linux/common/linux_exec.h>
-int linux_kern_sysctl(int *, u_int, void *, size_t *, void *, size_t,
- struct proc *);
-int linux_vm_sysctl(int *, u_int, void *, size_t *, void *, size_t,
- struct proc *);
-int linux_net_sysctl(int *, u_int, void *, size_t *, void *, size_t,
- struct proc *);
-int linux_proc_sysctl(int *, u_int, void *, size_t *, void *, size_t,
- struct proc *);
-int linux_fs_sysctl(int *, u_int, void *, size_t *, void *, size_t,
- struct proc *);
-#ifdef DEBUG
-int linux_debug_sysctl(int *, u_int, void *, size_t *, void *, size_t,
- struct proc *);
+char linux_sysname[128] = "Linux";
+#if defined(__i386__) || defined(__powerpc__)
+char linux_release[128] = "2.4.18";
+char linux_version[128] = "#0 Wed Feb 20 20:00:02 CET 2002";
+#else
+char linux_release[128] = "2.0.38";
+char linux_version[128] = "#0 Sun Nov 11 11:11:11 MET 2000";
#endif
-int linux_dev_sysctl(int *, u_int, void *, size_t *, void *, size_t,
- struct proc *);
-int linux_bus_sysctl(int *, u_int, void *, size_t *, void *, size_t,
- struct proc *);
+static struct sysctlnode linux_sysctl_root = {
+ .sysctl_flags = SYSCTL_ROOT|CTLTYPE_NODE,
+ .sysctl_num = 0,
+ .sysctl_size = sizeof(struct sysctlnode),
+ .sysctl_name = "(linux_root)",
+};
+
+/*
+ * setup for small sysctl tree used by emulation
+ */
+SYSCTL_SETUP(linux_sysctl_setup, "linux emulated sysctl subtree setup")
+{
+ struct sysctlnode *rnode, *node;
+
+ rnode = &linux_sysctl_root;
+ sysctl_createv(SYSCTL_PERMANENT,
+ CTLTYPE_NODE, "kern", &rnode,
+ NULL, 0, NULL, 0,
+ LINUX_CTL_KERN, CTL_EOL);
+
+ node = rnode;
+ sysctl_createv(SYSCTL_PERMANENT,
+ CTLTYPE_STRING, "ostype", &node,
+ NULL, 0, linux_sysname, sizeof(linux_sysname),
+ LINUX_KERN_OSTYPE, CTL_EOL);
+ node = rnode;
+ sysctl_createv(SYSCTL_PERMANENT,
+ CTLTYPE_STRING, "osrelease", &node,
+ NULL, 0, linux_release, sizeof(linux_release),
+ LINUX_KERN_OSRELEASE, CTL_EOL);
+ node = rnode;
+ sysctl_createv(SYSCTL_PERMANENT,
+ CTLTYPE_STRING, "version", &node,
+ NULL, 0, linux_version, sizeof(linux_version),
+ LINUX_KERN_VERSION, CTL_EOL);
+}
+
+/*
+ * linux sysctl system call
+ */
int
linux_sys___sysctl(struct lwp *l, void *v, register_t *retval)
{
- struct linux_sys___sysctl_args /* {
- syscallarg(struct linux___sysctl *) lsp;
- } */ *uap = v;
- struct proc *p = l->l_proc;
+ struct linux_sys___sysctl_args *uap = v;
struct linux___sysctl ls;
- int error;
+ int error, nerror, name[CTL_MAXNAME];
size_t savelen = 0, oldlen = 0;
- sysctlfn *fn;
- int name[CTL_MAXNAME];
- size_t *oldlenp;
-
- if ((error = copyin(SCARG(uap, lsp), &ls, sizeof ls)))
+ /*
+ * get linux args structure
+ */
+ if ((error = copyin(SCARG(uap, lsp), &ls, sizeof(ls))))
return error;
+
+ /*
+ * get oldlen
+ */
+ oldlen = 0;
+ if (ls.oldlenp != NULL) {
+ error = copyin(ls.oldlenp, &oldlen, sizeof(oldlen));
+ if (error)
+ return (error);
+ }
+ savelen = oldlen;
+
/*
- * all top-level sysctl names are non-terminal
+ * top-level sysctl names may or may not be non-terminal, but
+ * we don't care
*/
- if (ls.nlen > CTL_MAXNAME || ls.nlen < 2)
+ if (ls.nlen > CTL_MAXNAME || ls.nlen < 1)
return (EINVAL);
error = copyin(ls.name, &name, ls.nlen * sizeof(int));
if (error)
return (error);
/*
- * For all but CTL_PROC, must be root to change a value.
- * For CTL_PROC, must be root, or owner of the proc (and not suid),
- * this is checked in proc_sysctl() (once we know the targer proc).
+ * wire old so that copyout() is less likely to fail?
*/
- if (ls.newval != NULL && name[0] != CTL_PROC &&
- (error = suser(p->p_ucred, &p->p_acflag)))
- return error;
+ error = sysctl_lock(l, ls.oldval, savelen);
+ if (error)
+ return (error);
- switch (name[0]) {
- case LINUX_CTL_KERN:
- fn = linux_kern_sysctl;
- break;
- case LINUX_CTL_VM:
- fn = linux_vm_sysctl;
- break;
- case LINUX_CTL_NET:
- fn = linux_net_sysctl;
- break;
- case LINUX_CTL_PROC:
- fn = linux_proc_sysctl;
- break;
- case LINUX_CTL_FS:
- fn = linux_fs_sysctl;
- break;
-#ifdef DEBUG
- case LINUX_CTL_DEBUG:
- fn = linux_debug_sysctl;
- break;
-#endif
- case LINUX_CTL_DEV:
- fn = linux_dev_sysctl;
- break;
- case LINUX_CTL_BUS:
- fn = linux_bus_sysctl;
- break;
- default:
- return (EOPNOTSUPP);
- }
+ /*
+ * dispatch request into linux sysctl tree
+ */
+ error = sysctl_dispatch(&name[0], ls.nlen,
+ ls.oldval, &oldlen,
+ ls.newval, ls.newlen,
+ &name[0], l, &linux_sysctl_root);
/*
- * XXX Hey, we wire `oldval', but what about `newval'?
+ * release the sysctl lock
*/
- oldlenp = ls.oldlenp;
- if (oldlenp) {
- if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen))))
- return (error);
- oldlenp = &oldlen;
- }
- if (ls.oldval != NULL) {
- error = uvm_vslock(p, ls.oldval, oldlen,
- VM_PROT_READ|VM_PROT_WRITE);
- savelen = oldlen;
- }
- error = (*fn)(name + 1, ls.nlen - 1, ls.oldval, oldlenp, ls.newval,
- ls.newlen, p);
- if (ls.oldval != NULL)
- uvm_vsunlock(p, ls.oldval, savelen);
- if (error)
- return (error);
- if (ls.oldlenp)
- error = copyout(&oldlen, ls.oldlenp, sizeof(oldlen));
- return (error);
-}
+ sysctl_unlock(l);
-char linux_sysname[128] = "Linux";
-#if defined(__i386__) || defined(__powerpc__)
-char linux_release[128] = "2.4.18";
-char linux_version[128] = "#0 Wed Feb 20 20:00:02 CET 2002";
-#else
-char linux_release[128] = "2.0.38";
-char linux_version[128] = "#0 Sun Nov 11 11:11:11 MET 2000";
-#endif
+ /*
+ * lock state should now be only "needlock" and "canwait"
+ */
+ /* XXX KASSERT */
-/*
- * kernel related system variables.
- */
-int
-linux_kern_sysctl(int *name, u_int nlen, void *oldp, size_t *oldlenp,
- void *newp, size_t newlen, struct proc *p)
-{
/*
- * Note that we allow writing into this, so that userland
- * programs can setup things as they see fit. This is suboptimal.
+ * reset caller's oldlen, even if we got an error
*/
- switch (name[0]) {
- case LINUX_KERN_OSTYPE:
- return sysctl_string(oldp, oldlenp, newp, newlen,
- linux_sysname, sizeof(linux_sysname));
- case LINUX_KERN_OSRELEASE:
- return sysctl_string(oldp, oldlenp, newp, newlen,
- linux_release, sizeof(linux_release));
- case LINUX_KERN_VERSION:
- return sysctl_string(oldp, oldlenp, newp, newlen,
- linux_version, sizeof(linux_version));
- default:
- return EOPNOTSUPP;
+ if (ls.oldlenp) {
+ nerror = copyout(&oldlen, ls.oldlenp, sizeof(oldlen));
+ if (error == 0)
+ error = nerror;
}
-}
-
-/*
- * kernel related system variables.
- */
-int
-linux_sysctl(int *name, u_int nlen, void *oldp, size_t *oldlenp,
- void *newp, size_t newlen, struct proc *p)
-{
- if (nlen != 2 || name[0] != EMUL_LINUX_KERN)
- return EOPNOTSUPP;
/*
- * Note that we allow writing into this, so that userland
- * programs can setup things as they see fit. This is suboptimal.
+ * if the only problem is that we weren't given enough space,
+ * that's an ENOMEM error
*/
- switch (name[1]) {
- case EMUL_LINUX_KERN_OSTYPE:
- return sysctl_string(oldp, oldlenp, newp, newlen,
- linux_sysname, sizeof(linux_sysname));
- case EMUL_LINUX_KERN_OSRELEASE:
- return sysctl_string(oldp, oldlenp, newp, newlen,
- linux_release, sizeof(linux_release));
- case EMUL_LINUX_KERN_VERSION:
- return sysctl_string(oldp, oldlenp, newp, newlen,
- linux_version, sizeof(linux_version));
- default:
- return EOPNOTSUPP;
- }
+ if (error == 0 && ls.oldval != NULL && savelen < oldlen)
+ error = ENOMEM;
+
+ return (error);
}
/*
- * hardware related system variables.
+ * kernel related system variables under emul.linux in the main sysctl
+ * tree
*/
-int
-linux_vm_sysctl(int *name, u_int nlen, void *oldp, size_t *oldlenp,
- void *newp, size_t newlen, struct proc *p)
-{
- return (EOPNOTSUPP);
-}
-
-int
-linux_net_sysctl(int *name, u_int nlen, void *oldp, size_t *oldlenp,
- void *newp, size_t newlen, struct proc *p)
+SYSCTL_SETUP(sysctl_emul_linux_setup, "sysctl emul.linux subtree setup")
{
- return (EOPNOTSUPP);
-}
-int
-linux_proc_sysctl(int *name, u_int nlen, void *oldp, size_t *oldlenp,
- void *newp, size_t newlen, struct proc *p)
-{
- return (EOPNOTSUPP);
-}
-
-int
-linux_fs_sysctl(int *name, u_int nlen, void *oldp, size_t *oldlenp,
- void *newp, size_t newlen, struct proc *p)
-{
- return (EOPNOTSUPP);
-}
-#ifdef DEBUG
-int
-linux_debug_sysctl(int *name, u_int nlen, void *oldp, size_t *oldlenp,
- void *newp, size_t newlen, struct proc *p)
-{
- return (EOPNOTSUPP);
-}
-#endif /* DEBUG */
-
-int
-linux_dev_sysctl(int *name, u_int nlen, void *oldp, size_t *oldlenp,
- void *newp, size_t newlen, struct proc *p)
-{
- return (EOPNOTSUPP);
-}
-
-int
-linux_bus_sysctl(int *name, u_int nlen, void *oldp, size_t *oldlenp,
- void *newp, size_t newlen, struct proc *p)
-{
- return (EOPNOTSUPP);
+ sysctl_createv(SYSCTL_PERMANENT,
+ CTLTYPE_NODE, "emul", NULL,
+ NULL, 0, NULL, 0,
+ CTL_EMUL, CTL_EOL);
+ sysctl_createv(SYSCTL_PERMANENT,
+ CTLTYPE_NODE, "linux", NULL,
+ NULL, 0, NULL, 0,
+ CTL_EMUL, EMUL_LINUX, CTL_EOL);
+ sysctl_createv(SYSCTL_PERMANENT,
+ CTLTYPE_NODE, "kern", NULL,
+ NULL, 0, NULL, 0,
+ CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, CTL_EOL);
+
+ sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE,
+ CTLTYPE_STRING, "ostype", NULL,
+ NULL, 0, linux_sysname, sizeof(linux_sysname),
+ CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN,
+ EMUL_LINUX_KERN_OSTYPE, CTL_EOL);
+ sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE,
+ CTLTYPE_STRING, "osrelease", NULL,
+ NULL, 0, linux_release, sizeof(linux_release),
+ CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN,
+ EMUL_LINUX_KERN_OSRELEASE, CTL_EOL);
+ sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE,
+ CTLTYPE_STRING, "osversion", NULL,
+ NULL, 0, linux_version, sizeof(linux_version),
+ CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN,
+ EMUL_LINUX_KERN_VERSION, CTL_EOL);
}