1 /* $NetBSD: fstest_nfs.c,v 1.5 2010/12/31 18:11:27 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 struct nfstestargs *theargs; 70 71 72 /* fork rump nfsd, configure interface */ 73 static int 74 donewfs(const atf_tc_t *tc, void **argp, 75 const char *image, off_t size, void *fspriv) 76 { 77 const char *srcdir; 78 char *nfsdargv[7]; 79 char nfsdpath[MAXPATHLEN]; 80 char imagepath[MAXPATHLEN]; 81 char ethername[MAXPATHLEN], ethername_ro[MAXPATHLEN]; 82 char ifname[IFNAMSIZ], ifname_ro[IFNAMSIZ]; 83 char cwd[MAXPATHLEN]; 84 struct nfstestargs *args; 85 pid_t childpid; 86 int pipes[2]; 87 int devnull; 88 89 /* 90 * First, we start the nfs service. 91 */ 92 srcdir = atf_tc_get_config_var(tc, "srcdir"); 93 sprintf(nfsdpath, "%s/../nfs/nfsservice/rumpnfsd", srcdir); 94 sprintf(ethername, "/%s/%s.etherbus", getcwd(cwd, sizeof(cwd)), image); 95 sprintf(ethername_ro, "%s_ro", ethername); 96 sprintf(imagepath, "/%s/%s", cwd, image); 97 98 nfsdargv[0] = nfsdpath; 99 nfsdargv[1] = ethername; 100 nfsdargv[2] = ethername_ro; 101 nfsdargv[3] = __UNCONST(SERVERADDR); 102 nfsdargv[4] = __UNCONST(SERVERROADDR); 103 nfsdargv[5] = __UNCONST(NETNETMASK); 104 nfsdargv[6] = __UNCONST(EXPORTPATH); 105 nfsdargv[7] = imagepath; 106 nfsdargv[8] = NULL; 107 108 signal(SIGCHLD, childfail); 109 if (pipe(pipes) == -1) 110 return errno; 111 112 switch ((childpid = fork())) { 113 case 0: 114 if (chdir(dirname(nfsdpath)) == -1) 115 err(1, "chdir"); 116 close(pipes[0]); 117 if (dup2(pipes[1], 3) == -1) 118 err(1, "dup2"); 119 if (execvp(nfsdargv[0], nfsdargv) == -1) 120 err(1, "execvp"); 121 case -1: 122 return errno; 123 default: 124 close(pipes[1]); 125 break; 126 } 127 128 /* 129 * Ok, nfsd has been run. The following sleep helps with the 130 * theoretical problem that nfsd can't start fast enough to 131 * process our mount request and we end up doing a timeout 132 * before the mount. This would take several seconds. So 133 * try to make sure nfsd is up&running already at this stage. 134 */ 135 if (read(pipes[0], &devnull, 4) == -1) 136 return errno; 137 138 /* 139 * Configure our networking interface. 140 */ 141 rump_init(); 142 netcfg_rump_makeshmif(ethername, ifname); 143 netcfg_rump_if(ifname, CLIENTADDR, NETNETMASK); 144 netcfg_rump_makeshmif(ethername_ro, ifname_ro); 145 netcfg_rump_if(ifname_ro, CLIENTROADDR, NETNETMASK); 146 147 /* 148 * That's it. The rest is done in mount, since we don't have 149 * the mountpath available here. 150 */ 151 args = malloc(sizeof(*args)); 152 args->ta_childpid = childpid; 153 strcpy(args->ta_ethername, ethername); 154 155 *argp = args; 156 theargs = args; 157 158 return 0; 159 } 160 161 int 162 nfs_fstest_newfs(const atf_tc_t *tc, void **argp, 163 const char *image, off_t size, void *fspriv) 164 { 165 166 return donewfs(tc, argp, image, size, fspriv); 167 } 168 169 int 170 nfsro_fstest_newfs(const atf_tc_t *tc, void **argp, 171 const char *image, off_t size, void *fspriv) 172 { 173 174 return donewfs(tc, argp, image, size, fspriv); 175 } 176 177 /* mount the file system */ 178 static int 179 domount(const atf_tc_t *tc, void *arg, const char *serverpath, 180 const char *path, int flags) 181 { 182 char canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN]; 183 const char *nfscliargs[] = { 184 "nfsclient", 185 serverpath, 186 path, 187 NULL, 188 }; 189 struct nfs_args args; 190 int mntflags; 191 192 if (rump_sys_mkdir(path, 0777) == -1) 193 return errno; 194 195 /* XXX: atf does not reset values */ 196 optind = 1; 197 opterr = 1; 198 199 /* 200 * We use nfs parseargs here, since as a side effect it 201 * takes care of the RPC hulabaloo. 202 */ 203 mount_nfs_parseargs(__arraycount(nfscliargs)-1, __UNCONST(nfscliargs), 204 &args, &mntflags, canon_dev, canon_dir); 205 206 if (rump_sys_mount(MOUNT_NFS, path, flags, &args, sizeof(args)) == -1) { 207 return errno; 208 } 209 210 return 0; 211 } 212 213 int 214 nfs_fstest_mount(const atf_tc_t *tc, void *arg, const char *path, int flags) 215 { 216 217 return domount(tc, arg, SERVERADDR ":" EXPORTPATH, path, flags); 218 } 219 220 /* 221 * This is where the magic happens! 222 * 223 * If we are mounting r/w, do the normal thing. However, if we are 224 * doing a r/o mount, switch use the r/o server export address 225 * and do a r/w mount. This way we end up testing the r/o export policy 226 * of the server! (yes, slightly questionable semantics, but at least 227 * we notice very quickly if our assumption is broken in the future ;) 228 */ 229 int 230 nfsro_fstest_mount(const atf_tc_t *tc, void *arg, const char *path, int flags) 231 { 232 233 if (flags & MNT_RDONLY) { 234 flags &= ~MNT_RDONLY; 235 return domount(tc, arg, SERVERROADDR":"EXPORTPATH, path, flags); 236 } else { 237 return domount(tc, arg, SERVERADDR":"EXPORTPATH, path, flags); 238 } 239 } 240 241 static int 242 dodelfs(const atf_tc_t *tc, void *arg) 243 { 244 245 /* 246 * XXX: no access to "args" since we're called from "cleanup". 247 * Trust atf to kill nfsd process and remove etherfile. 248 */ 249 #if 0 250 /* 251 * It's highly expected that the child will die next, so we 252 * don't need that information anymore thank you very many. 253 */ 254 signal(SIGCHLD, SIG_IGN); 255 256 /* 257 * Just KILL it. Sending it SIGTERM first causes it to try 258 * to send some unmount RPCs, leading to sticky situations. 259 */ 260 kill(args->ta_childpid, SIGKILL); 261 wait(&status); 262 263 /* remove ethernet bus */ 264 if (unlink(args->ta_ethername) == -1) 265 atf_tc_fail_errno("unlink ethername"); 266 #endif 267 268 return 0; 269 } 270 271 int 272 nfs_fstest_delfs(const atf_tc_t *tc, void *arg) 273 { 274 275 return dodelfs(tc, arg); 276 } 277 278 int 279 nfsro_fstest_delfs(const atf_tc_t *tc, void *arg) 280 { 281 282 return dodelfs(tc, arg); 283 } 284 285 static int 286 dounmount(const atf_tc_t *tc, const char *path, int flags) 287 { 288 int status, i, sverrno; 289 290 /* 291 * NFS handles sillyrenames in an workqueue. Some of them might 292 * be still in the queue even if all user activity has ceased. 293 * We try to unmount for 2 seconds to give them a chance 294 * to flush out. 295 * 296 * PR kern/43799 297 */ 298 for (i = 0; i < 20; i++) { 299 if ((status = rump_sys_unmount(path, flags)) == 0) 300 break; 301 sverrno = errno; 302 if (sverrno != EBUSY) 303 break; 304 usleep(100000); 305 } 306 if (status == -1) 307 return sverrno; 308 309 if (rump_sys_rmdir(path) == -1) 310 return errno; 311 312 return 0; 313 } 314 315 int 316 nfs_fstest_unmount(const atf_tc_t *tc, const char *path, int flags) 317 { 318 319 return dounmount(tc, path, flags); 320 } 321 322 int 323 nfsro_fstest_unmount(const atf_tc_t *tc, const char *path, int flags) 324 { 325 326 return dounmount(tc, path, flags); 327 } 328