1 /* $NetBSD: fstest_nfs.c,v 1.11 2019/10/05 22:06:29 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/types.h> 29 #include <sys/mount.h> 30 #include <sys/socket.h> 31 #include <sys/statvfs.h> 32 #include <sys/wait.h> 33 34 #include <assert.h> 35 #include <atf-c.h> 36 #include <err.h> 37 #include <errno.h> 38 #include <fcntl.h> 39 #include <libgen.h> 40 #include <pthread.h> 41 #include <puffs.h> 42 #include <puffsdump.h> 43 #include <stdio.h> 44 #include <unistd.h> 45 #include <string.h> 46 #include <stdlib.h> 47 48 #include <rump/rump.h> 49 #include <rump/rump_syscalls.h> 50 51 #include "h_fsmacros.h" 52 #include "mount_nfs.h" 53 #include "../../net/config/netconfig.c" 54 55 #define SERVERADDR "10.3.2.1" 56 #define SERVERROADDR "10.4.2.1" 57 #define CLIENTADDR "10.3.2.2" 58 #define CLIENTROADDR "10.4.2.2" 59 #define NETNETMASK "255.255.255.0" 60 #define EXPORTPATH "/myexport" 61 62 static void 63 childfail(int status) 64 { 65 66 atf_tc_fail("child died"); 67 } 68 69 /* fork rump nfsd, configure interface */ 70 static int 71 donewfs(const atf_tc_t *tc, void **argp, 72 const char *image, off_t size, void *fspriv) 73 { 74 const char *srcdir; 75 char *nfsdargv[16]; 76 char nfsdpath[MAXPATHLEN]; 77 char imagepath[MAXPATHLEN]; 78 char ethername[MAXPATHLEN], ethername_ro[MAXPATHLEN]; 79 char ifname[IFNAMSIZ], ifname_ro[IFNAMSIZ]; 80 char cwd[MAXPATHLEN]; 81 struct nfstestargs *args; 82 pid_t childpid; 83 int pipes[2]; 84 int devnull; 85 86 /* 87 * First, we start the nfs service. 88 */ 89 srcdir = atf_tc_get_config_var(tc, "srcdir"); 90 snprintf(nfsdpath, sizeof nfsdpath, 91 "%s/../nfs/nfsservice/rumpnfsd", srcdir); 92 snprintf(ethername, sizeof ethername, 93 "/%s/%s.etherbus", getcwd(cwd, sizeof(cwd)), image); 94 snprintf(ethername_ro, sizeof ethername_ro, "%s_ro", ethername); 95 snprintf(imagepath, sizeof imagepath, "/%s/%s", cwd, image); 96 97 nfsdargv[0] = nfsdpath; 98 nfsdargv[1] = ethername; 99 nfsdargv[2] = ethername_ro; 100 nfsdargv[3] = __UNCONST(SERVERADDR); 101 nfsdargv[4] = __UNCONST(SERVERROADDR); 102 nfsdargv[5] = __UNCONST(NETNETMASK); 103 nfsdargv[6] = __UNCONST(EXPORTPATH); 104 nfsdargv[7] = imagepath; 105 nfsdargv[8] = NULL; 106 107 signal(SIGCHLD, childfail); 108 if (pipe(pipes) == -1) 109 return errno; 110 111 switch ((childpid = fork())) { 112 case 0: 113 if (chdir(dirname(nfsdpath)) == -1) 114 err(1, "chdir"); 115 close(pipes[0]); 116 if (dup2(pipes[1], 3) == -1) 117 err(1, "dup2"); 118 execvp(nfsdargv[0], nfsdargv); 119 err(1, "execvp"); 120 case -1: 121 return errno; 122 default: 123 close(pipes[1]); 124 break; 125 } 126 127 /* 128 * Ok, nfsd has been run. The following sleep helps with the 129 * theoretical problem that nfsd can't start fast enough to 130 * process our mount request and we end up doing a timeout 131 * before the mount. This would take several seconds. So 132 * try to make sure nfsd is up&running already at this stage. 133 */ 134 if (read(pipes[0], &devnull, 4) == -1) 135 return errno; 136 137 /* 138 * Configure our networking interface. 139 */ 140 rump_init(); 141 netcfg_rump_makeshmif(ethername, ifname); 142 netcfg_rump_if(ifname, CLIENTADDR, NETNETMASK); 143 netcfg_rump_makeshmif(ethername_ro, ifname_ro); 144 netcfg_rump_if(ifname_ro, CLIENTROADDR, NETNETMASK); 145 146 /* 147 * That's it. The rest is done in mount, since we don't have 148 * the mountpath available here. 149 */ 150 args = malloc(sizeof(*args)); 151 if (args == NULL) 152 return errno; 153 memset(args, 0, sizeof(*args)); 154 args->ta_childpid = childpid; 155 strcpy(args->ta_ethername, ethername); 156 157 *argp = args; 158 159 return 0; 160 } 161 162 int 163 nfs_fstest_newfs(const atf_tc_t *tc, void **argp, 164 const char *image, off_t size, void *fspriv) 165 { 166 167 return donewfs(tc, argp, image, size, fspriv); 168 } 169 170 int 171 nfsro_fstest_newfs(const atf_tc_t *tc, void **argp, 172 const char *image, off_t size, void *fspriv) 173 { 174 175 return donewfs(tc, argp, image, size, fspriv); 176 } 177 178 /* mount the file system */ 179 static int 180 domount(const atf_tc_t *tc, void *arg, const char *serverpath, 181 const char *path, int flags) 182 { 183 char canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN]; 184 const char *nfscliargs[] = { 185 "nfsclient", 186 serverpath, 187 path, 188 NULL, 189 }; 190 struct nfs_args args; 191 int mntflags; 192 193 if (rump_sys_mkdir(path, 0777) == -1) 194 return errno; 195 196 /* XXX: atf does not reset values */ 197 optind = 1; 198 opterr = 1; 199 200 /* 201 * We use nfs parseargs here, since as a side effect it 202 * takes care of the RPC hulabaloo. 203 */ 204 mount_nfs_parseargs(__arraycount(nfscliargs)-1, __UNCONST(nfscliargs), 205 &args, &mntflags, canon_dev, canon_dir); 206 207 if (rump_sys_mount(MOUNT_NFS, path, flags, &args, sizeof(args)) == -1) { 208 return errno; 209 } 210 211 return 0; 212 } 213 214 int 215 nfs_fstest_mount(const atf_tc_t *tc, void *arg, const char *path, int flags) 216 { 217 218 return domount(tc, arg, SERVERADDR ":" EXPORTPATH, path, flags); 219 } 220 221 /* 222 * This is where the magic happens! 223 * 224 * If we are mounting r/w, do the normal thing. However, if we are 225 * doing a r/o mount, switch use the r/o server export address 226 * and do a r/w mount. This way we end up testing the r/o export policy 227 * of the server! (yes, slightly questionable semantics, but at least 228 * we notice very quickly if our assumption is broken in the future ;) 229 */ 230 int 231 nfsro_fstest_mount(const atf_tc_t *tc, void *arg, const char *path, int flags) 232 { 233 234 if (flags & MNT_RDONLY) { 235 flags &= ~MNT_RDONLY; 236 return domount(tc, arg, SERVERROADDR":"EXPORTPATH, path, flags); 237 } else { 238 return domount(tc, arg, SERVERADDR":"EXPORTPATH, path, flags); 239 } 240 } 241 242 static int 243 dodelfs(const atf_tc_t *tc, void *arg) 244 { 245 246 /* 247 * XXX: no access to "args" since we're called from "cleanup". 248 * Trust atf to kill nfsd process and remove etherfile. 249 */ 250 #if 0 251 /* 252 * It's highly expected that the child will die next, so we 253 * don't need that information anymore thank you very many. 254 */ 255 signal(SIGCHLD, SIG_IGN); 256 257 /* 258 * Just KILL it. Sending it SIGTERM first causes it to try 259 * to send some unmount RPCs, leading to sticky situations. 260 */ 261 kill(args->ta_childpid, SIGKILL); 262 wait(&status); 263 264 /* remove ethernet bus */ 265 if (unlink(args->ta_ethername) == -1) 266 atf_tc_fail_errno("unlink ethername"); 267 #endif 268 269 return 0; 270 } 271 272 int 273 nfs_fstest_delfs(const atf_tc_t *tc, void *arg) 274 { 275 276 return dodelfs(tc, arg); 277 } 278 279 int 280 nfsro_fstest_delfs(const atf_tc_t *tc, void *arg) 281 { 282 283 return dodelfs(tc, arg); 284 } 285 286 static int 287 dounmount(const atf_tc_t *tc, const char *path, int flags) 288 { 289 int status, i, sverrno; 290 291 /* 292 * NFS handles sillyrenames in an workqueue. Some of them might 293 * be still in the queue even if all user activity has ceased. 294 * We try to unmount for 2 seconds to give them a chance 295 * to flush out. 296 * 297 * PR kern/43799 298 */ 299 for (i = 0; i < 20; i++) { 300 if ((status = rump_sys_unmount(path, flags)) == 0) 301 break; 302 sverrno = errno; 303 if (sverrno != EBUSY) 304 break; 305 usleep(100000); 306 } 307 if (status == -1) 308 return sverrno; 309 310 if (rump_sys_rmdir(path) == -1) 311 return errno; 312 313 return 0; 314 } 315 316 int 317 nfs_fstest_unmount(const atf_tc_t *tc, const char *path, int flags) 318 { 319 320 return dounmount(tc, path, flags); 321 } 322 323 int 324 nfsro_fstest_unmount(const atf_tc_t *tc, const char *path, int flags) 325 { 326 327 return dounmount(tc, path, flags); 328 } 329