Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 1 | #define _ATFILE_SOURCE |
| 2 | #include <sys/types.h> |
| 3 | #include <sys/stat.h> |
| 4 | #include <sys/wait.h> |
| 5 | #include <sys/inotify.h> |
| 6 | #include <sys/mount.h> |
| 7 | #include <sys/param.h> |
| 8 | #include <sys/syscall.h> |
| 9 | #include <stdio.h> |
| 10 | #include <string.h> |
| 11 | #include <sched.h> |
| 12 | #include <fcntl.h> |
| 13 | #include <dirent.h> |
| 14 | #include <errno.h> |
| 15 | #include <unistd.h> |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame^] | 16 | #include <ctype.h> |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 17 | |
| 18 | #include "utils.h" |
| 19 | #include "ip_common.h" |
| 20 | |
| 21 | #define NETNS_RUN_DIR "/var/run/netns" |
| 22 | #define NETNS_ETC_DIR "/etc/netns" |
| 23 | |
| 24 | #ifndef CLONE_NEWNET |
| 25 | #define CLONE_NEWNET 0x40000000 /* New network namespace (lo, device, names sockets, etc) */ |
| 26 | #endif |
| 27 | |
| 28 | #ifndef MNT_DETACH |
| 29 | #define MNT_DETACH 0x00000002 /* Just detach from the tree */ |
| 30 | #endif /* MNT_DETACH */ |
| 31 | |
Eric W. Biederman | 2e8a07f | 2011-07-15 14:26:59 +0000 | [diff] [blame] | 32 | #ifndef HAVE_SETNS |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 33 | static int setns(int fd, int nstype) |
| 34 | { |
| 35 | #ifdef __NR_setns |
| 36 | return syscall(__NR_setns, fd, nstype); |
| 37 | #else |
| 38 | errno = ENOSYS; |
| 39 | return -1; |
| 40 | #endif |
| 41 | } |
Eric W. Biederman | 2e8a07f | 2011-07-15 14:26:59 +0000 | [diff] [blame] | 42 | #endif /* HAVE_SETNS */ |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 43 | |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 44 | static int usage(void) |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 45 | { |
| 46 | fprintf(stderr, "Usage: ip netns list\n"); |
| 47 | fprintf(stderr, " ip netns add NAME\n"); |
| 48 | fprintf(stderr, " ip netns delete NAME\n"); |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame^] | 49 | fprintf(stderr, " ip netns identify PID\n"); |
| 50 | fprintf(stderr, " ip netns pids NAME\n"); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 51 | fprintf(stderr, " ip netns exec NAME cmd ...\n"); |
| 52 | fprintf(stderr, " ip netns monitor\n"); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 53 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 54 | } |
| 55 | |
| 56 | int get_netns_fd(const char *name) |
| 57 | { |
| 58 | char pathbuf[MAXPATHLEN]; |
| 59 | const char *path, *ptr; |
| 60 | |
| 61 | path = name; |
| 62 | ptr = strchr(name, '/'); |
| 63 | if (!ptr) { |
| 64 | snprintf(pathbuf, sizeof(pathbuf), "%s/%s", |
| 65 | NETNS_RUN_DIR, name ); |
| 66 | path = pathbuf; |
| 67 | } |
| 68 | return open(path, O_RDONLY); |
| 69 | } |
| 70 | |
| 71 | static int netns_list(int argc, char **argv) |
| 72 | { |
| 73 | struct dirent *entry; |
| 74 | DIR *dir; |
| 75 | |
| 76 | dir = opendir(NETNS_RUN_DIR); |
| 77 | if (!dir) |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 78 | return EXIT_SUCCESS; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 79 | |
| 80 | while ((entry = readdir(dir)) != NULL) { |
| 81 | if (strcmp(entry->d_name, ".") == 0) |
| 82 | continue; |
| 83 | if (strcmp(entry->d_name, "..") == 0) |
| 84 | continue; |
| 85 | printf("%s\n", entry->d_name); |
| 86 | } |
| 87 | closedir(dir); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 88 | return EXIT_SUCCESS; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 89 | } |
| 90 | |
| 91 | static void bind_etc(const char *name) |
| 92 | { |
| 93 | char etc_netns_path[MAXPATHLEN]; |
| 94 | char netns_name[MAXPATHLEN]; |
| 95 | char etc_name[MAXPATHLEN]; |
| 96 | struct dirent *entry; |
| 97 | DIR *dir; |
| 98 | |
| 99 | snprintf(etc_netns_path, sizeof(etc_netns_path), "%s/%s", NETNS_ETC_DIR, name); |
| 100 | dir = opendir(etc_netns_path); |
| 101 | if (!dir) |
| 102 | return; |
| 103 | |
| 104 | while ((entry = readdir(dir)) != NULL) { |
| 105 | if (strcmp(entry->d_name, ".") == 0) |
| 106 | continue; |
| 107 | if (strcmp(entry->d_name, "..") == 0) |
| 108 | continue; |
| 109 | snprintf(netns_name, sizeof(netns_name), "%s/%s", etc_netns_path, entry->d_name); |
| 110 | snprintf(etc_name, sizeof(etc_name), "/etc/%s", entry->d_name); |
| 111 | if (mount(netns_name, etc_name, "none", MS_BIND, NULL) < 0) { |
| 112 | fprintf(stderr, "Bind %s -> %s failed: %s\n", |
| 113 | netns_name, etc_name, strerror(errno)); |
| 114 | } |
| 115 | } |
| 116 | closedir(dir); |
| 117 | } |
| 118 | |
| 119 | static int netns_exec(int argc, char **argv) |
| 120 | { |
| 121 | /* Setup the proper environment for apps that are not netns |
| 122 | * aware, and execute a program in that environment. |
| 123 | */ |
| 124 | const char *name, *cmd; |
| 125 | char net_path[MAXPATHLEN]; |
| 126 | int netns; |
| 127 | |
| 128 | if (argc < 1) { |
| 129 | fprintf(stderr, "No netns name specified\n"); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 130 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 131 | } |
| 132 | if (argc < 2) { |
| 133 | fprintf(stderr, "No cmd specified\n"); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 134 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 135 | } |
| 136 | name = argv[0]; |
| 137 | cmd = argv[1]; |
| 138 | snprintf(net_path, sizeof(net_path), "%s/%s", NETNS_RUN_DIR, name); |
| 139 | netns = open(net_path, O_RDONLY); |
| 140 | if (netns < 0) { |
Eric W. Biederman | 4395d48 | 2013-01-17 14:46:43 +0000 | [diff] [blame] | 141 | fprintf(stderr, "Cannot open network namespace %s: %s\n", |
| 142 | name, strerror(errno)); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 143 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 144 | } |
| 145 | if (setns(netns, CLONE_NEWNET) < 0) { |
| 146 | fprintf(stderr, "seting the network namespace failed: %s\n", |
| 147 | strerror(errno)); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 148 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 149 | } |
| 150 | |
| 151 | if (unshare(CLONE_NEWNS) < 0) { |
| 152 | fprintf(stderr, "unshare failed: %s\n", strerror(errno)); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 153 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 154 | } |
Eric W. Biederman | 144e6ce | 2013-01-17 14:45:33 +0000 | [diff] [blame] | 155 | /* Don't let any mounts propogate back to the parent */ |
| 156 | if (mount("", "/", "none", MS_SLAVE | MS_REC, NULL)) { |
| 157 | fprintf(stderr, "mount --make-rslave / failed: %s\n", |
| 158 | strerror(errno)); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 159 | return EXIT_FAILURE; |
Eric W. Biederman | 144e6ce | 2013-01-17 14:45:33 +0000 | [diff] [blame] | 160 | } |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 161 | /* Mount a version of /sys that describes the network namespace */ |
| 162 | if (umount2("/sys", MNT_DETACH) < 0) { |
| 163 | fprintf(stderr, "umount of /sys failed: %s\n", strerror(errno)); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 164 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 165 | } |
| 166 | if (mount(name, "/sys", "sysfs", 0, NULL) < 0) { |
| 167 | fprintf(stderr, "mount of /sys failed: %s\n",strerror(errno)); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 168 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 169 | } |
| 170 | |
| 171 | /* Setup bind mounts for config files in /etc */ |
| 172 | bind_etc(name); |
| 173 | |
| 174 | if (execvp(cmd, argv + 1) < 0) |
| 175 | fprintf(stderr, "exec of %s failed: %s\n", |
| 176 | cmd, strerror(errno)); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 177 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 178 | } |
| 179 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame^] | 180 | static int is_pid(const char *str) |
| 181 | { |
| 182 | int ch; |
| 183 | for (; (ch = *str); str++) { |
| 184 | if (!isdigit(ch)) |
| 185 | return 0; |
| 186 | } |
| 187 | return 1; |
| 188 | } |
| 189 | |
| 190 | static int netns_pids(int argc, char **argv) |
| 191 | { |
| 192 | const char *name; |
| 193 | char net_path[MAXPATHLEN]; |
| 194 | int netns; |
| 195 | struct stat netst; |
| 196 | DIR *dir; |
| 197 | struct dirent *entry; |
| 198 | |
| 199 | if (argc < 1) { |
| 200 | fprintf(stderr, "No netns name specified\n"); |
| 201 | return EXIT_FAILURE; |
| 202 | } |
| 203 | if (argc > 1) { |
| 204 | fprintf(stderr, "extra arguments specified\n"); |
| 205 | return EXIT_FAILURE; |
| 206 | } |
| 207 | |
| 208 | name = argv[0]; |
| 209 | snprintf(net_path, sizeof(net_path), "%s/%s", NETNS_RUN_DIR, name); |
| 210 | netns = open(net_path, O_RDONLY); |
| 211 | if (netns < 0) { |
| 212 | fprintf(stderr, "Cannot open network namespace: %s\n", |
| 213 | strerror(errno)); |
| 214 | return EXIT_FAILURE; |
| 215 | } |
| 216 | if (fstat(netns, &netst) < 0) { |
| 217 | fprintf(stderr, "Stat of netns failed: %s\n", |
| 218 | strerror(errno)); |
| 219 | return EXIT_FAILURE; |
| 220 | } |
| 221 | dir = opendir("/proc/"); |
| 222 | if (!dir) { |
| 223 | fprintf(stderr, "Open of /proc failed: %s\n", |
| 224 | strerror(errno)); |
| 225 | return EXIT_FAILURE; |
| 226 | } |
| 227 | while((entry = readdir(dir))) { |
| 228 | char pid_net_path[MAXPATHLEN]; |
| 229 | struct stat st; |
| 230 | if (!is_pid(entry->d_name)) |
| 231 | continue; |
| 232 | snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%s/ns/net", |
| 233 | entry->d_name); |
| 234 | if (stat(pid_net_path, &st) != 0) |
| 235 | continue; |
| 236 | if ((st.st_dev == netst.st_dev) && |
| 237 | (st.st_ino == netst.st_ino)) { |
| 238 | printf("%s\n", entry->d_name); |
| 239 | } |
| 240 | } |
| 241 | closedir(dir); |
| 242 | return EXIT_SUCCESS; |
| 243 | |
| 244 | } |
| 245 | |
| 246 | static int netns_identify(int argc, char **argv) |
| 247 | { |
| 248 | const char *pidstr; |
| 249 | char net_path[MAXPATHLEN]; |
| 250 | int netns; |
| 251 | struct stat netst; |
| 252 | DIR *dir; |
| 253 | struct dirent *entry; |
| 254 | |
| 255 | if (argc < 1) { |
| 256 | fprintf(stderr, "No pid specified\n"); |
| 257 | return EXIT_FAILURE; |
| 258 | } |
| 259 | if (argc > 1) { |
| 260 | fprintf(stderr, "extra arguments specified\n"); |
| 261 | return EXIT_FAILURE; |
| 262 | } |
| 263 | pidstr = argv[0]; |
| 264 | |
| 265 | if (!is_pid(pidstr)) { |
| 266 | fprintf(stderr, "Specified string '%s' is not a pid\n", |
| 267 | pidstr); |
| 268 | return EXIT_FAILURE; |
| 269 | } |
| 270 | |
| 271 | snprintf(net_path, sizeof(net_path), "/proc/%s/ns/net", pidstr); |
| 272 | netns = open(net_path, O_RDONLY); |
| 273 | if (netns < 0) { |
| 274 | fprintf(stderr, "Cannot open network namespace: %s\n", |
| 275 | strerror(errno)); |
| 276 | return EXIT_FAILURE; |
| 277 | } |
| 278 | if (fstat(netns, &netst) < 0) { |
| 279 | fprintf(stderr, "Stat of netns failed: %s\n", |
| 280 | strerror(errno)); |
| 281 | return EXIT_FAILURE; |
| 282 | } |
| 283 | dir = opendir(NETNS_RUN_DIR); |
| 284 | if (!dir) { |
| 285 | /* Succeed treat a missing directory as an empty directory */ |
| 286 | if (errno == ENOENT) |
| 287 | return EXIT_SUCCESS; |
| 288 | |
| 289 | fprintf(stderr, "Failed to open directory %s:%s\n", |
| 290 | NETNS_RUN_DIR, strerror(errno)); |
| 291 | return EXIT_FAILURE; |
| 292 | } |
| 293 | |
| 294 | while((entry = readdir(dir))) { |
| 295 | char name_path[MAXPATHLEN]; |
| 296 | struct stat st; |
| 297 | |
| 298 | if (strcmp(entry->d_name, ".") == 0) |
| 299 | continue; |
| 300 | if (strcmp(entry->d_name, "..") == 0) |
| 301 | continue; |
| 302 | |
| 303 | snprintf(name_path, sizeof(name_path), "%s/%s", NETNS_RUN_DIR, |
| 304 | entry->d_name); |
| 305 | |
| 306 | if (stat(name_path, &st) != 0) |
| 307 | continue; |
| 308 | |
| 309 | if ((st.st_dev == netst.st_dev) && |
| 310 | (st.st_ino == netst.st_ino)) { |
| 311 | printf("%s\n", entry->d_name); |
| 312 | } |
| 313 | } |
| 314 | closedir(dir); |
| 315 | return EXIT_SUCCESS; |
| 316 | |
| 317 | } |
| 318 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 319 | static int netns_delete(int argc, char **argv) |
| 320 | { |
| 321 | const char *name; |
| 322 | char netns_path[MAXPATHLEN]; |
| 323 | |
| 324 | if (argc < 1) { |
| 325 | fprintf(stderr, "No netns name specified\n"); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 326 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 327 | } |
| 328 | |
| 329 | name = argv[0]; |
| 330 | snprintf(netns_path, sizeof(netns_path), "%s/%s", NETNS_RUN_DIR, name); |
| 331 | umount2(netns_path, MNT_DETACH); |
| 332 | if (unlink(netns_path) < 0) { |
| 333 | fprintf(stderr, "Cannot remove %s: %s\n", |
| 334 | netns_path, strerror(errno)); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 335 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 336 | } |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 337 | return EXIT_SUCCESS; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | static int netns_add(int argc, char **argv) |
| 341 | { |
| 342 | /* This function creates a new network namespace and |
| 343 | * a new mount namespace and bind them into a well known |
| 344 | * location in the filesystem based on the name provided. |
| 345 | * |
| 346 | * The mount namespace is created so that any necessary |
| 347 | * userspace tweaks like remounting /sys, or bind mounting |
| 348 | * a new /etc/resolv.conf can be shared between uers. |
| 349 | */ |
| 350 | char netns_path[MAXPATHLEN]; |
| 351 | const char *name; |
Eric W. Biederman | 223f4d8 | 2011-07-15 14:29:41 +0000 | [diff] [blame] | 352 | int fd; |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 353 | int made_netns_run_dir_mount = 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 354 | |
| 355 | if (argc < 1) { |
| 356 | fprintf(stderr, "No netns name specified\n"); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 357 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 358 | } |
| 359 | name = argv[0]; |
| 360 | |
| 361 | snprintf(netns_path, sizeof(netns_path), "%s/%s", NETNS_RUN_DIR, name); |
| 362 | |
| 363 | /* Create the base netns directory if it doesn't exist */ |
| 364 | mkdir(NETNS_RUN_DIR, S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH); |
| 365 | |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 366 | /* Make it possible for network namespace mounts to propogate between |
| 367 | * mount namespaces. This makes it likely that a unmounting a network |
| 368 | * namespace file in one namespace will unmount the network namespace |
| 369 | * file in all namespaces allowing the network namespace to be freed |
| 370 | * sooner. |
| 371 | */ |
| 372 | while (mount("", NETNS_RUN_DIR, "none", MS_SHARED | MS_REC, NULL)) { |
| 373 | /* Fail unless we need to make the mount point */ |
| 374 | if (errno != EINVAL || made_netns_run_dir_mount) { |
| 375 | fprintf(stderr, "mount --make-shared %s failed: %s\n", |
| 376 | NETNS_RUN_DIR, strerror(errno)); |
| 377 | return EXIT_FAILURE; |
| 378 | } |
| 379 | |
| 380 | /* Upgrade NETNS_RUN_DIR to a mount point */ |
| 381 | if (mount(NETNS_RUN_DIR, NETNS_RUN_DIR, "none", MS_BIND, NULL)) { |
| 382 | fprintf(stderr, "mount --bind %s %s failed: %s\n", |
| 383 | NETNS_RUN_DIR, NETNS_RUN_DIR, strerror(errno)); |
| 384 | return EXIT_FAILURE; |
| 385 | } |
| 386 | made_netns_run_dir_mount = 1; |
| 387 | } |
| 388 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 389 | /* Create the filesystem state */ |
Eric W. Biederman | 223f4d8 | 2011-07-15 14:29:41 +0000 | [diff] [blame] | 390 | fd = open(netns_path, O_RDONLY|O_CREAT|O_EXCL, 0); |
| 391 | if (fd < 0) { |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 392 | fprintf(stderr, "Could not create %s: %s\n", |
| 393 | netns_path, strerror(errno)); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 394 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 395 | } |
Eric W. Biederman | 223f4d8 | 2011-07-15 14:29:41 +0000 | [diff] [blame] | 396 | close(fd); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 397 | if (unshare(CLONE_NEWNET) < 0) { |
| 398 | fprintf(stderr, "Failed to create a new network namespace: %s\n", |
| 399 | strerror(errno)); |
| 400 | goto out_delete; |
| 401 | } |
| 402 | |
| 403 | /* Bind the netns last so I can watch for it */ |
| 404 | if (mount("/proc/self/ns/net", netns_path, "none", MS_BIND, NULL) < 0) { |
| 405 | fprintf(stderr, "Bind /proc/self/ns/net -> %s failed: %s\n", |
| 406 | netns_path, strerror(errno)); |
| 407 | goto out_delete; |
| 408 | } |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 409 | return EXIT_SUCCESS; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 410 | out_delete: |
| 411 | netns_delete(argc, argv); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 412 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 413 | } |
| 414 | |
| 415 | |
| 416 | static int netns_monitor(int argc, char **argv) |
| 417 | { |
| 418 | char buf[4096]; |
| 419 | struct inotify_event *event; |
| 420 | int fd; |
| 421 | fd = inotify_init(); |
| 422 | if (fd < 0) { |
| 423 | fprintf(stderr, "inotify_init failed: %s\n", |
| 424 | strerror(errno)); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 425 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 426 | } |
| 427 | if (inotify_add_watch(fd, NETNS_RUN_DIR, IN_CREATE | IN_DELETE) < 0) { |
| 428 | fprintf(stderr, "inotify_add_watch failed: %s\n", |
| 429 | strerror(errno)); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 430 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 431 | } |
| 432 | for(;;) { |
| 433 | ssize_t len = read(fd, buf, sizeof(buf)); |
| 434 | if (len < 0) { |
| 435 | fprintf(stderr, "read failed: %s\n", |
| 436 | strerror(errno)); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 437 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 438 | } |
| 439 | for (event = (struct inotify_event *)buf; |
| 440 | (char *)event < &buf[len]; |
| 441 | event = (struct inotify_event *)((char *)event + sizeof(*event) + event->len)) { |
| 442 | if (event->mask & IN_CREATE) |
| 443 | printf("add %s\n", event->name); |
| 444 | if (event->mask & IN_DELETE) |
| 445 | printf("delete %s\n", event->name); |
| 446 | } |
| 447 | } |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 448 | return EXIT_SUCCESS; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 449 | } |
| 450 | |
| 451 | int do_netns(int argc, char **argv) |
| 452 | { |
| 453 | if (argc < 1) |
| 454 | return netns_list(0, NULL); |
| 455 | |
| 456 | if ((matches(*argv, "list") == 0) || (matches(*argv, "show") == 0) || |
| 457 | (matches(*argv, "lst") == 0)) |
| 458 | return netns_list(argc-1, argv+1); |
| 459 | |
| 460 | if (matches(*argv, "help") == 0) |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 461 | return usage(); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 462 | |
| 463 | if (matches(*argv, "add") == 0) |
| 464 | return netns_add(argc-1, argv+1); |
| 465 | |
| 466 | if (matches(*argv, "delete") == 0) |
| 467 | return netns_delete(argc-1, argv+1); |
| 468 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame^] | 469 | if (matches(*argv, "identify") == 0) |
| 470 | return netns_identify(argc-1, argv+1); |
| 471 | |
| 472 | if (matches(*argv, "pids") == 0) |
| 473 | return netns_pids(argc-1, argv+1); |
| 474 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 475 | if (matches(*argv, "exec") == 0) |
| 476 | return netns_exec(argc-1, argv+1); |
| 477 | |
| 478 | if (matches(*argv, "monitor") == 0) |
| 479 | return netns_monitor(argc-1, argv+1); |
| 480 | |
| 481 | fprintf(stderr, "Command \"%s\" is unknown, try \"ip netns help\".\n", *argv); |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 482 | return EXIT_FAILURE; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 483 | } |