1 /* $NetBSD: t_renamerace.c,v 1.8 2010/07/14 21:39:31 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 37 static void * 38 r2w1(void *arg) 39 { 40 int fd; 41 42 rump_pub_lwp_alloc_and_switch(0, 0); 43 44 fd = rump_sys_open("/file", O_CREAT | O_RDWR, 0777); 45 if (fd == -1) 46 atf_tc_fail_errno("creat"); 47 rump_sys_close(fd); 48 49 while (!quittingtime) { 50 if (rump_sys_rename("/file", "/dir/file") == -1) 51 atf_tc_fail_errno("rename 1"); 52 if (rump_sys_rename("/dir/file", "/file") == -1) 53 atf_tc_fail_errno("rename 2"); 54 } 55 56 return NULL; 57 } 58 59 static void * 60 r2w2(void *arg) 61 { 62 int fd; 63 64 rump_pub_lwp_alloc_and_switch(0, 0); 65 66 while (!quittingtime) { 67 fd = rump_sys_open("/dir/file1", O_RDWR); 68 if (fd != -1) 69 rump_sys_close(fd); 70 } 71 72 return NULL; 73 } 74 75 ATF_TC_BODY(renamerace2, tc) 76 { 77 struct tmpfs_args args; 78 struct utsname un; 79 pthread_t pt[2]; 80 81 /* 82 * Check that we are running on an SMP-capable arch. It should 83 * be a rump capability, but after the CPU_INFO_FOREACH is 84 * fixed, it will be every arch (for rump), so don't bother. 85 */ 86 if (uname(&un) == -1) 87 atf_tc_fail_errno("uname"); 88 if (strcmp(un.machine, "i386") != 0 && strcmp(un.machine, "amd64") != 0) 89 atf_tc_skip("i386 or amd64 required (have %s)", un.machine); 90 91 /* 92 * Force SMP regardless of how many host CPUs there are. 93 * Deadlock is highly unlikely to trigger otherwise. 94 */ 95 setenv("RUMP_NCPU", "2", 1); 96 97 rump_init(); 98 memset(&args, 0, sizeof(args)); 99 args.ta_version = TMPFS_ARGS_VERSION; 100 args.ta_root_mode = 0777; 101 if (rump_sys_mount(MOUNT_TMPFS, "/", 0, &args, sizeof(args)) == -1) 102 atf_tc_fail_errno("could not mount tmpfs"); 103 104 if (rump_sys_mkdir("/dir", 0777) == -1) 105 atf_tc_fail_errno("cannot create directory"); 106 107 pthread_create(&pt[0], NULL, r2w1, NULL); 108 pthread_create(&pt[1], NULL, r2w2, NULL); 109 110 /* usually triggers in <<1s for me */ 111 sleep(4); 112 quittingtime = 1; 113 114 atf_tc_expect_timeout("PR kern/36681"); 115 116 pthread_join(pt[0], NULL); 117 pthread_join(pt[1], NULL); 118 } 119 120 ATF_TP_ADD_TCS(tp) 121 { 122 ATF_TP_ADD_TC(tp, renamerace2); 123 124 return atf_no_error(); 125 } 126