1 /* 2 * Support for decoding of NS_* ioctl commands. 3 * 4 * Copyright (c) 2017 Nikolay Marchuk <marchuk.nikolay.a (at) gmail.com> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include "defs.h" 31 #include "nsfs.h" 32 33 int 34 nsfs_ioctl(struct tcb *tcp, unsigned int code, kernel_ulong_t arg) 35 { 36 unsigned int uid; 37 switch (code) { 38 case NS_GET_USERNS: 39 case NS_GET_PARENT: 40 return RVAL_IOCTL_DECODED | RVAL_FD; 41 case NS_GET_NSTYPE: 42 if (entering(tcp)) 43 return 0; 44 if (!syserror(tcp)) { 45 const char *outstr; 46 outstr = xlookup(setns_types, tcp->u_rval); 47 if (outstr) { 48 tcp->auxstr = outstr; 49 return RVAL_IOCTL_DECODED | RVAL_STR; 50 } 51 } 52 return RVAL_IOCTL_DECODED; 53 case NS_GET_OWNER_UID: 54 if (entering(tcp)) 55 return 0; 56 tprints(", "); 57 if (!umove_or_printaddr(tcp, arg, &uid)) { 58 printuid("[", uid); 59 tprints("]"); 60 } 61 return RVAL_IOCTL_DECODED; 62 default: 63 return RVAL_DECODED; 64 } 65 } 66
