1 /* $NetBSD: fstest_nfs.c,v 1.9 2011/02/28 21:08:46 pooka 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 sprintf(nfsdpath, "%s/../nfs/nfsservice/rumpnfsd", srcdir); 91 sprintf(ethername, "/%s/%s.etherbus", getcwd(cwd, sizeof(cwd)), image); 92 sprintf(ethername_ro, "%s_ro", ethername); 93 sprintf(imagepath, "/%s/%s", cwd, image); 94 95 nfsdargv[0] = nfsdpath; 96 nfsdargv[1] = ethername; 97 nfsdargv[2] = ethername_ro; 98 nfsdargv[3] = __UNCONST(SERVERADDR); 99 nfsdargv[4] = __UNCONST(SERVERROADDR); 100 nfsdargv[5] = __UNCONST(NETNETMASK); 101 nfsdargv[6] = __UNCONST(EXPORTPATH); 102 nfsdargv[7] = imagepath; 103 nfsdargv[8] = NULL; 104 105 signal(SIGCHLD, childfail); 106 if (pipe(pipes) == -1) 107 return errno; 108 109 switch ((childpid = fork())) { 110 case 0: 111 if (chdir(dirname(nfsdpath)) == -1) 112 err(1, "chdir"); 113 close(pipes[0]); 114 if (dup2(pipes[1], 3) == -1) 115 err(1, "dup2"); 116 if (execvp(nfsdargv[0], nfsdargv) == -1) 117 err(1, "execvp"); 118 case -1: 119 return errno; 120 default: 121 close(pipes[1]); 122 break; 123 } 124 125 /* 126 * Ok, nfsd has been run. The following sleep helps with the 127 * theoretical problem that nfsd can't start fast enough to 128 * process our mount request and we end up doing a timeout 129 * before the mount. This would take several seconds. So 130 * try to make sure nfsd is up&running already at this stage. 131 */ 132 if (read(pipes[0], &devnull, 4) == -1) 133 return errno; 134 135 /* 136 * Configure our networking interface. 137 */ 138 rump_init(); 139 netcfg_rump_makeshmif(ethername, ifname); 140 netcfg_rump_if(ifname, CLIENTADDR, NETNETMASK); 141 netcfg_rump_makeshmif(ethername_ro, ifname_ro); 142 netcfg_rump_if(ifname_ro, CLIENTROADDR, NETNETMASK); 143 144 /* 145 * That's it. The rest is done in mount, since we don't have 146 * the mountpath available here. 147 */ 148 args = malloc(sizeof(*args)); 149 if (args == NULL) 150 return errno; 151 memset(args, 0, sizeof(*args)); 152 args->ta_childpid = childpid; 153 strcpy(args->ta_ethername, ethername); 154 155 *argp = args; 156 157 return 0; 158 } 159 160 int 161 nfs_fstest_newfs(const atf_tc_t *tc, void **argp, 162 const char *image, off_t size, void *fspriv) 163 { 164 165 return donewfs(tc, argp, image, size, fspriv); 166 } 167 168 int 169 nfsro_fstest_newfs(const atf_tc_t *tc, void **argp, 170 const char *image, off_t size, void *fspriv) 171 { 172 173 return donewfs(tc, argp, image, size, fspriv); 174 } 175 176 /* mount the file system */ 177 static int 178 domount(const atf_tc_t *tc, void *arg, const char *serverpath, 179 const char *path, int flags) 180 { 181 char canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN]; 182 const char *nfscliargs[] = { 183 "nfsclient", 184 serverpath, 185 path, 186 NULL, 187 }; 188 struct nfs_args args; 189 int mntflags; 190 191 if (rump_sys_mkdir(path, 0777) == -1) 192 return errno; 193 194 /* XXX: atf does not reset values */ 195 optind = 1; 196 opterr = 1; 197 198 /* 199 * We use nfs parseargs here, since as a side effect it 200 * takes care of the RPC hulabaloo. 201 */ 202 mount_nfs_parseargs(__arraycount(nfscliargs)-1, __UNCONST(nfscliargs), 203 &args, &mntflags, canon_dev, canon_dir); 204 205 if (rump_sys_mount(MOUNT_NFS, path, flags, &args, sizeof(args)) == -1) { 206 return errno; 207 } 208 209 return 0; 210 } 211 212 int 213 nfs_fstest_mount(const atf_tc_t *tc, void *arg, const char *path, int flags) 214 { 215 216 return domount(tc, arg, SERVERADDR ":" EXPORTPATH, path, flags); 217 } 218 219 /* 220 * This is where the magic happens! 221 * 222 * If we are mounting r/w, do the normal thing. However, if we are 223 * doing a r/o mount, switch use the r/o server export address 224 * and do a r/w mount. This way we end up testing the r/o export policy 225 * of the server! (yes, slightly questionable semantics, but at least 226 * we notice very quickly if our assumption is broken in the future ;) 227 */ 228 int 229 nfsro_fstest_mount(const atf_tc_t *tc, void *arg, const char *path, int flags) 230 { 231 232 if (flags & MNT_RDONLY) { 233 flags &= ~MNT_RDONLY; 234 return domount(tc, arg, SERVERROADDR":"EXPORTPATH, path, flags); 235 } else { 236 return domount(tc, arg, SERVERADDR":"EXPORTPATH, path, flags); 237 } 238 } 239 240 static int 241 dodelfs(const atf_tc_t *tc, void *arg) 242 { 243 244 /* 245 * XXX: no access to "args" since we're called from "cleanup". 246 * Trust atf to kill nfsd process and remove etherfile. 247 */ 248 #if 0 249 /* 250 * It's highly expected that the child will die next, so we 251 * don't need that information anymore thank you very many. 252 */ 253 signal(SIGCHLD, SIG_IGN); 254 255 /* 256 * Just KILL it. Sending it SIGTERM first causes it to try 257 * to send some unmount RPCs, leading to sticky situations. 258 */ 259 kill(args->ta_childpid, SIGKILL); 260 wait(&status); 261 262 /* remove ethernet bus */ 263 if (unlink(args->ta_ethername) == -1) 264 atf_tc_fail_errno("unlink ethername"); 265 #endif 266 267 return 0; 268 } 269 270 int 271 nfs_fstest_delfs(const atf_tc_t *tc, void *arg) 272 { 273 274 return dodelfs(tc, arg); 275 } 276 277 int 278 nfsro_fstest_delfs(const atf_tc_t *tc, void *arg) 279 { 280 281 return dodelfs(tc, arg); 282 } 283 284 static int 285 dounmount(const atf_tc_t *tc, const char *path, int flags) 286 { 287 int status, i, sverrno; 288 289 /* 290 * NFS handles sillyrenames in an workqueue. Some of them might 291 * be still in the queue even if all user activity has ceased. 292 * We try to unmount for 2 seconds to give them a chance 293 * to flush out. 294 * 295 * PR kern/43799 296 */ 297 for (i = 0; i < 20; i++) { 298 if ((status = rump_sys_unmount(path, flags)) == 0) 299 break; 300 sverrno = errno; 301 if (sverrno != EBUSY) 302 break; 303 usleep(100000); 304 } 305 if (status == -1) 306 return sverrno; 307 308 if (rump_sys_rmdir(path) == -1) 309 return errno; 310 311 return 0; 312 } 313 314 int 315 nfs_fstest_unmount(const atf_tc_t *tc, const char *path, int flags) 316 { 317 318 return dounmount(tc, path, flags); 319 } 320 321 int 322 nfsro_fstest_unmount(const atf_tc_t *tc, const char *path, int flags) 323 { 324 325 return dounmount(tc, path, flags); 326 } 327