diff options
Diffstat (limited to 'sys/compat/linux/linux_sysctl.c')
| -rw-r--r-- | sys/compat/linux/linux_sysctl.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/sys/compat/linux/linux_sysctl.c b/sys/compat/linux/linux_sysctl.c new file mode 100644 index 0000000..decd8f8 --- /dev/null +++ b/sys/compat/linux/linux_sysctl.c @@ -0,0 +1,194 @@ +/*- + * Copyright (c) 2001 Marcel Moolenaar + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer + * in this position and unchanged. + * 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. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "opt_compat.h" +#include "opt_kdtrace.h" + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/malloc.h> +#include <sys/mutex.h> +#include <sys/proc.h> +#include <sys/sdt.h> +#include <sys/sysctl.h> +#include <sys/systm.h> +#include <sys/sbuf.h> + +#ifdef COMPAT_LINUX32 +#include <machine/../linux32/linux.h> +#include <machine/../linux32/linux32_proto.h> +#else +#include <machine/../linux/linux.h> +#include <machine/../linux/linux_proto.h> +#endif + +#include <compat/linux/linux_dtrace.h> +#include <compat/linux/linux_misc.h> +#include <compat/linux/linux_util.h> + +#define LINUX_CTL_KERN 1 +#define LINUX_CTL_VM 2 +#define LINUX_CTL_NET 3 +#define LINUX_CTL_PROC 4 +#define LINUX_CTL_FS 5 +#define LINUX_CTL_DEBUG 6 +#define LINUX_CTL_DEV 7 +#define LINUX_CTL_BUS 8 + +/* CTL_KERN names */ +#define LINUX_KERN_OSTYPE 1 +#define LINUX_KERN_OSRELEASE 2 +#define LINUX_KERN_OSREV 3 +#define LINUX_KERN_VERSION 4 + +/* DTrace init */ +LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE); + +/** + * DTrace probes in this module. + */ +LIN_SDT_PROBE_DEFINE2(sysctl, handle_string, entry, "struct l___sysctl_args *", + "char *"); +LIN_SDT_PROBE_DEFINE1(sysctl, handle_string, copyout_error, "int"); +LIN_SDT_PROBE_DEFINE1(sysctl, handle_string, return, "int"); +LIN_SDT_PROBE_DEFINE2(sysctl, linux_sysctl, entry, "struct l___sysctl_args *", + "struct thread *"); +LIN_SDT_PROBE_DEFINE1(sysctl, linux_sysctl, copyin_error, "int"); +LIN_SDT_PROBE_DEFINE2(sysctl, linux_sysctl, wrong_length, "int", "int"); +LIN_SDT_PROBE_DEFINE1(sysctl, linux_sysctl, unsupported_sysctl, "char *"); +LIN_SDT_PROBE_DEFINE1(sysctl, linux_sysctl, return, "int"); + +static int +handle_string(struct l___sysctl_args *la, char *value) +{ + int error; + + LIN_SDT_PROBE2(sysctl, handle_string, entry, la, value); + + if (la->oldval != 0) { + l_int len = strlen(value); + error = copyout(value, PTRIN(la->oldval), len + 1); + if (!error && la->oldlenp != 0) + error = copyout(&len, PTRIN(la->oldlenp), sizeof(len)); + if (error) { + LIN_SDT_PROBE1(sysctl, handle_string, copyout_error, + error); + LIN_SDT_PROBE1(sysctl, handle_string, return, error); + return (error); + } + } + + if (la->newval != 0) { + LIN_SDT_PROBE1(sysctl, handle_string, return, ENOTDIR); + return (ENOTDIR); + } + + LIN_SDT_PROBE1(sysctl, handle_string, return, 0); + return (0); +} + +int +linux_sysctl(struct thread *td, struct linux_sysctl_args *args) +{ + struct l___sysctl_args la; + struct sbuf *sb; + l_int *mib; + char *sysctl_string; + int error, i; + + LIN_SDT_PROBE2(sysctl, linux_sysctl, entry, td, args->args); + + error = copyin(args->args, &la, sizeof(la)); + if (error) { + LIN_SDT_PROBE1(sysctl, linux_sysctl, copyin_error, error); + LIN_SDT_PROBE1(sysctl, linux_sysctl, return, error); + return (error); + } + + if (la.nlen <= 0 || la.nlen > LINUX_CTL_MAXNAME) { + LIN_SDT_PROBE2(sysctl, linux_sysctl, wrong_length, la.nlen, + LINUX_CTL_MAXNAME); + LIN_SDT_PROBE1(sysctl, linux_sysctl, return, ENOTDIR); + return (ENOTDIR); + } + + mib = malloc(la.nlen * sizeof(l_int), M_TEMP, M_WAITOK); + error = copyin(PTRIN(la.name), mib, la.nlen * sizeof(l_int)); + if (error) { + LIN_SDT_PROBE1(sysctl, linux_sysctl, copyin_error, error); + LIN_SDT_PROBE1(sysctl, linux_sysctl, return, error); + free(mib, M_TEMP); + return (error); + } + + switch (mib[0]) { + case LINUX_CTL_KERN: + if (la.nlen < 2) + break; + + switch (mib[1]) { + case LINUX_KERN_VERSION: + error = handle_string(&la, version); + free(mib, M_TEMP); + LIN_SDT_PROBE1(sysctl, linux_sysctl, return, error); + return (error); + default: + break; + } + break; + default: + break; + } + + sb = sbuf_new(NULL, NULL, 20 + la.nlen * 5, SBUF_AUTOEXTEND); + if (sb == NULL) { + linux_msg(td, "sysctl is not implemented"); + LIN_SDT_PROBE1(sysctl, linux_sysctl, unsupported_sysctl, + "unknown sysctl, ENOMEM during lookup"); + } else { + sbuf_printf(sb, "sysctl "); + for (i = 0; i < la.nlen; i++) + sbuf_printf(sb, "%c%d", (i) ? ',' : '{', mib[i]); + sbuf_printf(sb, "} is not implemented"); + sbuf_finish(sb); + sysctl_string = sbuf_data(sb); + linux_msg(td, "%s", sbuf_data(sb)); + LIN_SDT_PROBE1(sysctl, linux_sysctl, unsupported_sysctl, + sysctl_string); + sbuf_delete(sb); + } + + free(mib, M_TEMP); + + LIN_SDT_PROBE1(sysctl, linux_sysctl, return, ENOTDIR); + return (ENOTDIR); +} |
