1 /* 2 * Copyright (c) 2015-2017 Dmitry V. Levin <ldv (at) altlinux.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "defs.h" 29 30 #include DEF_MPERS_TYPE(struct_sock_fprog) 31 32 #include <linux/filter.h> 33 typedef struct sock_fprog struct_sock_fprog; 34 35 #include MPERS_DEFS 36 #include "bpf_fprog.h" 37 38 MPERS_PRINTER_DECL(unsigned int, get_sock_fprog_size, void) 39 { 40 return sizeof(struct_sock_fprog); 41 } 42 43 MPERS_PRINTER_DECL(bool, fetch_bpf_fprog, struct tcb *const tcp, 44 const kernel_ulong_t addr, void *const p) 45 { 46 struct bpf_fprog *pfp = p; 47 struct_sock_fprog mfp; 48 49 if ((sizeof(*pfp) == sizeof(mfp)) 50 && (offsetof(struct bpf_fprog, filter) == 51 offsetof(struct_sock_fprog, filter))) 52 return !umove_or_printaddr(tcp, addr, pfp); 53 54 if (umove_or_printaddr(tcp, addr, &mfp)) 55 return false; 56 57 pfp->len = mfp.len; 58 pfp->filter = 59 #ifndef IN_MPERS 60 (uintptr_t) 61 #endif 62 mfp.filter; 63 return true; 64 } 65
