1 /* $NetBSD: t_renamerace.c,v 1.27 2013/03/17 02:48:31 jmmv 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 /* Bump the size of the test file system image to a larger value. 25 * 26 * These tests cause a lot of churn in the file system by creating and 27 * deleting files/directories in quick succession. A faster CPU will cause 28 * more churn because the tests are capped by a run time period in seconds, 29 * not number of operations. 30 * 31 * This is all fine except for LFS, because the lfs_cleanerd cannot keep up 32 * with the churn and thus causes the test to fail on fast machines. Hence 33 * the reason for this hack. */ 34 #define FSTEST_IMGSIZE (50000 * 512) 35 36 #include "../common/h_fsmacros.h" 37 #include "../../h_macros.h" 38 39 static volatile int quittingtime; 40 pid_t wrkpid; 41 42 static void * 43 w1(void *arg) 44 { 45 int fd; 46 47 rump_pub_lwproc_newlwp(wrkpid); 48 49 while (!quittingtime) { 50 fd = rump_sys_open("rename.test1", 51 O_WRONLY|O_CREAT|O_TRUNC, 0666); 52 if (fd == -1 && errno != EEXIST) 53 atf_tc_fail_errno("create"); 54 rump_sys_unlink("rename.test1"); 55 rump_sys_close(fd); 56 } 57 58 return NULL; 59 } 60 61 static void * 62 w1_dirs(void *arg) 63 { 64 65 rump_pub_lwproc_newlwp(wrkpid); 66 67 while (!quittingtime) { 68 if (rump_sys_mkdir("rename.test1", 0777) == -1) 69 atf_tc_fail_errno("mkdir"); 70 rump_sys_rmdir("rename.test1"); 71 } 72 73 return NULL; 74 } 75 76 static void * 77 w2(void *arg) 78 { 79 80 rump_pub_lwproc_newlwp(wrkpid); 81 82 while (!quittingtime) { 83 rump_sys_rename("rename.test1", "rename.test2"); 84 } 85 86 return NULL; 87 } 88 89 #define NWRK 8 90 static void 91 renamerace(const atf_tc_t *tc, const char *mp) 92 { 93 pthread_t pt1[NWRK], pt2[NWRK]; 94 int i; 95 96 if (FSTYPE_RUMPFS(tc)) 97 atf_tc_skip("rename not supported by file system"); 98 99 RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG)); 100 RL(wrkpid = rump_sys_getpid()); 101 102 RL(rump_sys_chdir(mp)); 103 for (i = 0; i < NWRK; i++) 104 pthread_create(&pt1[i], NULL, w1, NULL); 105 106 for (i = 0; i < NWRK; i++) 107 pthread_create(&pt2[i], NULL, w2, NULL); 108 109 sleep(5); 110 quittingtime = 1; 111 112 for (i = 0; i < NWRK; i++) 113 pthread_join(pt1[i], NULL); 114 for (i = 0; i < NWRK; i++) 115 pthread_join(pt2[i], NULL); 116 RL(rump_sys_chdir("/")); 117 118 if (FSTYPE_MSDOS(tc)) { 119 atf_tc_expect_fail("PR kern/44661"); 120 /* 121 * XXX: race does not trigger every time at least 122 * on amd64/qemu. 123 */ 124 if (msdosfs_fstest_unmount(tc, mp, 0) != 0) { 125 rump_pub_vfs_mount_print(mp, 1); 126 atf_tc_fail_errno("unmount failed"); 127 } 128 atf_tc_fail("race did not trigger this time"); 129 } 130 } 131 132 static void 133 renamerace_dirs(const atf_tc_t *tc, const char *mp) 134 { 135 pthread_t pt1, pt2; 136 137 if (FSTYPE_SYSVBFS(tc)) 138 atf_tc_skip("directories not supported by file system"); 139 140 if (FSTYPE_RUMPFS(tc)) 141 atf_tc_skip("rename not supported by file system"); 142 143 /* XXX: msdosfs also sometimes hangs */ 144 if (FSTYPE_MSDOS(tc)) 145 atf_tc_expect_signal(-1, "PR kern/43626"); 146 147 RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG)); 148 RL(wrkpid = rump_sys_getpid()); 149 150 RL(rump_sys_chdir(mp)); 151 pthread_create(&pt1, NULL, w1_dirs, NULL); 152 pthread_create(&pt2, NULL, w2, NULL); 153 154 sleep(5); 155 quittingtime = 1; 156 157 pthread_join(pt1, NULL); 158 pthread_join(pt2, NULL); 159 RL(rump_sys_chdir("/")); 160 161 /* 162 * Doesn't always trigger when run on a slow backend 163 * (i.e. not on tmpfs/mfs). So do the usual kludge. 164 */ 165 if (FSTYPE_MSDOS(tc)) 166 abort(); 167 } 168 169 ATF_TC_FSAPPLY(renamerace, "rename(2) race with file unlinked mid-operation"); 170 ATF_TC_FSAPPLY(renamerace_dirs, "rename(2) race with directories"); 171 172 ATF_TP_ADD_TCS(tp) 173 { 174 175 ATF_TP_FSAPPLY(renamerace); /* PR kern/41128 */ 176 ATF_TP_FSAPPLY(renamerace_dirs); 177 178 return atf_no_error(); 179 } 180