strace/nsfs.c
Nikolay Marchuk 2afd57decb Implement decoding of NS_* ioctl commands
* configure.ac (AC_CHECK_HEADERS): Add linux/nsfs.h.
* defs.h (DECL_IOCTL(nsfs)): New prototype.
(setns_types): Make global.
* ioctl.c (ioctl_decode): Call nsfs_ioctl for 0xb7 code.
* nsfs.c: New file.
* nsfs.h: Likewise.
* Makefile.am (strace_SOURCES): Add them.
* tests/ioctl_nsfs.c: New file.
* tests/ioctl_nsfs.test: Likewise.
* tests/.gitignore: Add ioctl_nsfs.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add ioctl_nsfs.test.
* NEWS: Mention this change.
2017-04-13 15:46:49 +00:00

66 lines
2.2 KiB
C

/*
* Support for decoding of NS_* ioctl commands.
*
* Copyright (c) 2017 Nikolay Marchuk <marchuk.nikolay.a@gmail.com>
* 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.
* 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 "defs.h"
#include "nsfs.h"
int
nsfs_ioctl(struct tcb *tcp, unsigned int code, kernel_ulong_t arg)
{
unsigned int uid;
switch (code) {
case NS_GET_USERNS:
case NS_GET_PARENT:
return 1 + RVAL_FD + RVAL_DECODED;
case NS_GET_NSTYPE:
if (entering(tcp))
return 0;
if (!syserror(tcp)) {
const char *outstr;
outstr = xlookup(setns_types, tcp->u_rval);
if (outstr) {
tcp->auxstr = outstr;
return 1 + RVAL_STR;
}
}
return 1;
case NS_GET_OWNER_UID:
if (entering(tcp))
return 0;
tprints(", ");
if (!umove_or_printaddr(tcp, arg, &uid)) {
printuid("[", uid);
tprints("]");
}
return 1;
default:
return RVAL_DECODED;
}
}