1 /*- 2 * Copyright (c) 2008 Peter Holm <pho@FreeBSD.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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 /* Test lockf(3) with overlapping ranges */ 29 30 /* Provoked: 31 lock order reversal: 32 1st 0xc50057a0 vnode interlock (vnode interlock) @ kern/kern_lockf.c:190 33 2nd 0xc14710e8 system map (system map) @ vm/vm_kern.c:296 34 */ 35 36 #include <sys/types.h> 37 38 #include <err.h> 39 #include <errno.h> 40 #include <fcntl.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <strings.h> 44 #include <unistd.h> 45 46 #include "stress.h" 47 48 static char file[128]; 49 static int fd; 50 static int freespace; 51 52 int 53 setup(int nb) 54 { 55 int64_t bl; 56 int64_t in; 57 int64_t reserve_bl; 58 int64_t reserve_in; 59 int i; 60 char buf[1024]; 61 62 if (nb == 0) { 63 getdf(&bl, &in); 64 65 /* Resource requirements: */ 66 reserve_in = 1 * op->incarnations; 67 reserve_bl = 1081344 * op->incarnations; 68 freespace = (reserve_bl <= bl && reserve_in <= in); 69 if (!freespace) 70 reserve_bl = reserve_in = 0; 71 72 if (op->verbose > 1) 73 printf("lockf2(incarnations=%d). Free(%jdk, %jd), reserve(%jdk, %jd)\n", 74 op->incarnations, bl/1024, in, reserve_bl/1024, reserve_in); 75 reservedf(reserve_bl, reserve_in); 76 putval(freespace); 77 } else { 78 freespace = getval(); 79 } 80 if (!freespace) 81 exit (0); 82 83 sprintf(file, "lockf.%d", getpid()); 84 if ((fd = open(file,O_CREAT | O_TRUNC | O_RDWR, 0600)) == -1) 85 err(1, "creat(%s)", file); 86 bzero(buf, sizeof(buf)); 87 for (i = 0; i < 1024; i++) 88 if (write(fd, &buf, sizeof(buf)) != sizeof(buf)) 89 err(1, "write"); 90 close(fd); 91 return (0); 92 } 93 94 void 95 cleanup(void) 96 { 97 unlink(file); 98 } 99 100 int 101 test(void) 102 { 103 off_t pos; 104 off_t size; 105 int i, r; 106 107 if ((fd = open(file, O_RDWR, 0600)) == -1) 108 err(1, "open(%s)", file); 109 110 for (i = 0; i < 1024 && done_testing == 0; i++) { 111 pos = random_int(0, 1024 * 1024 - 1); 112 if (lseek(fd, pos, SEEK_SET) == -1) 113 err(1, "lseek"); 114 size = random_int(1, 1024 * 1024 - pos); 115 if (size > 64) 116 size = 64; 117 do { 118 r = lockf(fd, F_LOCK, size); 119 } while (r == -1 && errno == EINTR); 120 if (r == -1) 121 err(1, "lockf(%s, F_LOCK)", file); 122 size = random_int(1, size); 123 if (lockf(fd, F_ULOCK, size) == -1) 124 err(1, "lockf(%s, F_ULOCK)", file); 125 126 } 127 close(fd); 128 129 return (0); 130 } 131