1 /* $NetBSD: t_basic.c,v 1.4 2017/01/13 21:30:40 christos Exp $ */ 2 3 #include <sys/types.h> 4 #include <sys/mount.h> 5 6 #include <atf-c.h> 7 #include <err.h> 8 #include <errno.h> 9 #include <fcntl.h> 10 #include <stdio.h> 11 #include <unistd.h> 12 #include <string.h> 13 #include <stdlib.h> 14 15 #include <rump/rump.h> 16 #include <rump/rump_syscalls.h> 17 18 #include <miscfs/nullfs/null.h> 19 #include <fs/tmpfs/tmpfs_args.h> 20 21 #include "h_macros.h" 22 23 ATF_TC(basic); 24 ATF_TC_HEAD(basic, tc) 25 { 26 atf_tc_set_md_var(tc, "descr", "basic nullfs functionality"); 27 } 28 29 #define MSTR "magic bus" 30 31 static void 32 xput_tfile(const char *path, const char *mstr) 33 { 34 int fd; 35 36 fd = rump_sys_open(path, O_CREAT | O_RDWR, 0777); 37 if (fd == -1) 38 atf_tc_fail_errno("create %s", path); 39 if (rump_sys_write(fd, MSTR, sizeof(MSTR)) != sizeof(MSTR)) 40 atf_tc_fail_errno("write to testfile"); 41 rump_sys_close(fd); 42 } 43 44 static int 45 xread_tfile(const char *path, const char *mstr) 46 { 47 char buf[128]; 48 int fd; 49 50 fd = rump_sys_open(path, O_RDONLY); 51 if (fd == -1) 52 return errno; 53 if (rump_sys_read(fd, buf, sizeof(buf)) == -1) 54 atf_tc_fail_errno("read tfile"); 55 rump_sys_close(fd); 56 if (strcmp(buf, MSTR) == 0) 57 return 0; 58 return EPROGMISMATCH; 59 } 60 61 static void 62 mountnull(const char *what, const char *mp, int flags) 63 { 64 struct null_args nargs; 65 66 memset(&nargs, 0, sizeof(nargs)); 67 nargs.nulla_target = __UNCONST(what); 68 if (rump_sys_mount(MOUNT_NULL, mp, flags, &nargs, sizeof(nargs)) == -1) 69 atf_tc_fail_errno("could not mount nullfs"); 70 71 } 72 73 ATF_TC_BODY(basic, tc) 74 { 75 struct tmpfs_args targs; 76 struct stat sb; 77 int error; 78 79 rump_init(); 80 if (rump_sys_mkdir("/td1", 0777) == -1) 81 atf_tc_fail_errno("mp1"); 82 if (rump_sys_mkdir("/td2", 0777) == -1) 83 atf_tc_fail_errno("mp1"); 84 85 /* use tmpfs because rumpfs doesn't support regular files */ 86 memset(&targs, 0, sizeof(targs)); 87 targs.ta_version = TMPFS_ARGS_VERSION; 88 targs.ta_root_mode = 0777; 89 if (rump_sys_mount(MOUNT_TMPFS, "/td1", 0, &targs, sizeof(targs)) == -1) 90 atf_tc_fail_errno("could not mount tmpfs td1"); 91 92 mountnull("/td1", "/td2", 0); 93 94 /* test unnull -> null */ 95 xput_tfile("/td1/tensti", "jeppe"); 96 error = xread_tfile("/td2/tensti", "jeppe"); 97 if (error != 0) 98 atf_tc_fail("null compare failed: %d (%s)", 99 error, strerror(error)); 100 101 /* test null -> unnull */ 102 xput_tfile("/td2/kiekko", "keppi"); 103 error = xread_tfile("/td1/kiekko", "keppi"); 104 if (error != 0) 105 atf_tc_fail("unnull compare failed: %d (%s)", 106 error, strerror(error)); 107 108 /* test unnull -> null overwrite */ 109 xput_tfile("/td1/tensti", "se oolannin sota"); 110 error = xread_tfile("/td2/tensti", "se oolannin sota"); 111 if (error != 0) 112 atf_tc_fail("unnull compare failed: %d (%s)", 113 error, strerror(error)); 114 115 /* test that /td2 is unaffected in "real life" */ 116 if (rump_sys_unmount("/td2", 0) == -1) 117 atf_tc_fail_errno("cannot unmount nullfs"); 118 if ((error = rump_sys_stat("/td2/tensti", &sb)) != -1 119 || errno != ENOENT) { 120 atf_tc_fail("stat tensti should return ENOENT, got %d", error); 121 } 122 if ((error = rump_sys_stat("/td2/kiekko", &sb)) != -1 123 || errno != ENOENT) { 124 atf_tc_fail("stat kiekko should return ENOENT, got %d", error); 125 } 126 127 /* done */ 128 } 129 130 ATF_TC(twistymount); 131 ATF_TC_HEAD(twistymount, tc) 132 { 133 134 /* this is expected to fail until the PR is fixed */ 135 atf_tc_set_md_var(tc, "descr", "\"recursive\" mounts deadlock" 136 " (kern/43439)"); 137 } 138 139 /* 140 * Mapping to identifiers in kern/43439: 141 * /td = /home/current/pkgsrc 142 * /td/dist = /home/current/pkgsrc/distiles 143 * /mp = /usr/pkgsrc 144 * /mp/dist = /usr/pkgsrc/distfiles -- "created" by first null mount 145 */ 146 147 ATF_TC_BODY(twistymount, tc) 148 { 149 int mkd = 0; 150 151 rump_init(); 152 153 if (rump_sys_mkdir("/td", 0777) == -1) 154 atf_tc_fail_errno("mkdir %d", mkd++); 155 if (rump_sys_mkdir("/td/dist", 0777) == -1) 156 atf_tc_fail_errno("mkdir %d", mkd++); 157 if (rump_sys_mkdir("/mp", 0777) == -1) 158 atf_tc_fail_errno("mkdir %d", mkd++); 159 160 /* MNT_RDONLY doesn't matter, but just for compat with the PR */ 161 mountnull("/td", "/mp", MNT_RDONLY); 162 mountnull("/td/dist", "/mp/dist", 0); 163 164 /* if we didn't get a locking-against-meself panic, we passed */ 165 } 166 167 ATF_TP_ADD_TCS(tp) 168 { 169 170 ATF_TP_ADD_TC(tp, basic); 171 ATF_TP_ADD_TC(tp, twistymount); 172 173 return atf_no_error(); 174 } 175