1 /* $NetBSD: t_renamerace.c,v 1.9 2010/09/01 19:41:27 pooka Exp $ */ 2 3 /* 4 * Modified for rump and atf from a program supplied 5 * by Nicolas Joly in kern/40948 6 */ 7 8 #include <sys/types.h> 9 #include <sys/mount.h> 10 #include <sys/utsname.h> 11 12 #include <atf-c.h> 13 #include <errno.h> 14 #include <fcntl.h> 15 #include <pthread.h> 16 #include <stdio.h> 17 #include <stdlib.h> 18 #include <string.h> 19 #include <unistd.h> 20 21 #include <rump/rump.h> 22 #include <rump/rump_syscalls.h> 23 24 #include <fs/tmpfs/tmpfs_args.h> 25 26 #include "../../h_macros.h" 27 28 ATF_TC(renamerace2); 29 ATF_TC_HEAD(renamerace2, tc) 30 { 31 atf_tc_set_md_var(tc, "descr", "rename(2) lock order inversion"); 32 atf_tc_set_md_var(tc, "timeout", "6"); 33 } 34 35 static volatile int quittingtime = 0; 36 static pid_t wrkpid; 37 38 static void * 39 r2w1(void *arg) 40 { 41 int fd; 42 43 rump_pub_lwproc_newlwp(wrkpid); 44 45 fd = rump_sys_open("/file", O_CREAT | O_RDWR, 0777); 46 if (fd == -1) 47 atf_tc_fail_errno("creat"); 48 rump_sys_close(fd); 49 50 while (!quittingtime) { 51 if (rump_sys_rename("/file", "/dir/file") == -1) 52 atf_tc_fail_errno("rename 1"); 53 if (rump_sys_rename("/dir/file", "/file") == -1) 54 atf_tc_fail_errno("rename 2"); 55 } 56 57 return NULL; 58 } 59 60 static void * 61 r2w2(void *arg) 62 { 63 int fd; 64 65 rump_pub_lwproc_newlwp(wrkpid); 66 67 while (!quittingtime) { 68 fd = rump_sys_open("/dir/file1", O_RDWR); 69 if (fd != -1) 70 rump_sys_close(fd); 71 } 72 73 return NULL; 74 } 75 76 ATF_TC_BODY(renamerace2, tc) 77 { 78 struct tmpfs_args args; 79 struct utsname un; 80 pthread_t pt[2]; 81 82 /* 83 * Check that we are running on an SMP-capable arch. It should 84 * be a rump capability, but after the CPU_INFO_FOREACH is 85 * fixed, it will be every arch (for rump), so don't bother. 86 */ 87 if (uname(&un) == -1) 88 atf_tc_fail_errno("uname"); 89 if (strcmp(un.machine, "i386") != 0 && strcmp(un.machine, "amd64") != 0) 90 atf_tc_skip("i386 or amd64 required (have %s)", un.machine); 91 92 /* 93 * Force SMP regardless of how many host CPUs there are. 94 * Deadlock is highly unlikely to trigger otherwise. 95 */ 96 setenv("RUMP_NCPU", "2", 1); 97 98 rump_init(); 99 memset(&args, 0, sizeof(args)); 100 args.ta_version = TMPFS_ARGS_VERSION; 101 args.ta_root_mode = 0777; 102 if (rump_sys_mount(MOUNT_TMPFS, "/", 0, &args, sizeof(args)) == -1) 103 atf_tc_fail_errno("could not mount tmpfs"); 104 105 if (rump_sys_mkdir("/dir", 0777) == -1) 106 atf_tc_fail_errno("cannot create directory"); 107 108 RZ(rump_pub_lwproc_newproc()); 109 RL(wrkpid = rump_sys_getpid()); 110 pthread_create(&pt[0], NULL, r2w1, NULL); 111 pthread_create(&pt[1], NULL, r2w2, NULL); 112 113 /* usually triggers in <<1s for me */ 114 sleep(4); 115 quittingtime = 1; 116 117 atf_tc_expect_timeout("PR kern/36681"); 118 119 pthread_join(pt[0], NULL); 120 pthread_join(pt[1], NULL); 121 } 122 123 ATF_TP_ADD_TCS(tp) 124 { 125 ATF_TP_ADD_TC(tp, renamerace2); 126 127 return atf_no_error(); 128 } 129