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" |
Vadim Kochan | eb67e44 | 2014-12-24 23:04:08 +0200 | [diff] [blame] | 20 | #include "namespace.h" |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 21 | |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 22 | static int usage(void) |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 23 | { |
| 24 | fprintf(stderr, "Usage: ip netns list\n"); |
| 25 | fprintf(stderr, " ip netns add NAME\n"); |
Vadim Kochan | 3372493 | 2015-01-18 16:10:19 +0200 | [diff] [blame^] | 26 | fprintf(stderr, " ip [-all] netns delete [NAME]\n"); |
vadimk | 0948adc | 2014-11-07 18:25:30 +0200 | [diff] [blame] | 27 | fprintf(stderr, " ip netns identify [PID]\n"); |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 28 | fprintf(stderr, " ip netns pids NAME\n"); |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 29 | fprintf(stderr, " ip [-all] netns exec [NAME] cmd ...\n"); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 30 | fprintf(stderr, " ip netns monitor\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 31 | exit(-1); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 32 | } |
| 33 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 34 | static int netns_list(int argc, char **argv) |
| 35 | { |
| 36 | struct dirent *entry; |
| 37 | DIR *dir; |
| 38 | |
| 39 | dir = opendir(NETNS_RUN_DIR); |
| 40 | if (!dir) |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 41 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 42 | |
| 43 | while ((entry = readdir(dir)) != NULL) { |
| 44 | if (strcmp(entry->d_name, ".") == 0) |
| 45 | continue; |
| 46 | if (strcmp(entry->d_name, "..") == 0) |
| 47 | continue; |
| 48 | printf("%s\n", entry->d_name); |
| 49 | } |
| 50 | closedir(dir); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 51 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 52 | } |
| 53 | |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 54 | static int cmd_exec(const char *cmd, char **argv, bool do_fork) |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 55 | { |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 56 | fflush(stdout); |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 57 | if (do_fork) { |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 58 | int status; |
| 59 | pid_t pid; |
| 60 | |
| 61 | pid = fork(); |
| 62 | if (pid < 0) { |
| 63 | perror("fork"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 64 | exit(1); |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 65 | } |
| 66 | |
| 67 | if (pid != 0) { |
| 68 | /* Parent */ |
| 69 | if (waitpid(pid, &status, 0) < 0) { |
| 70 | perror("waitpid"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 71 | exit(1); |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 72 | } |
| 73 | |
Nicolas Dichtel | 3c61c01 | 2013-08-29 14:29:07 +0200 | [diff] [blame] | 74 | if (WIFEXITED(status)) { |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 75 | return WEXITSTATUS(status); |
Nicolas Dichtel | 3c61c01 | 2013-08-29 14:29:07 +0200 | [diff] [blame] | 76 | } |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 77 | |
Nicolas Dichtel | 3c61c01 | 2013-08-29 14:29:07 +0200 | [diff] [blame] | 78 | exit(1); |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 79 | } |
| 80 | } |
| 81 | |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 82 | if (execvp(cmd, argv) < 0) |
Kees van Reeuwijk | 14645ec | 2013-02-08 03:32:36 +0000 | [diff] [blame] | 83 | fprintf(stderr, "exec of \"%s\" failed: %s\n", |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 84 | cmd, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 85 | _exit(1); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 86 | } |
| 87 | |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 88 | static int on_netns_exec(char *nsname, void *arg) |
| 89 | { |
| 90 | char **argv = arg; |
| 91 | cmd_exec(argv[1], argv + 1, true); |
| 92 | return 0; |
| 93 | } |
| 94 | |
| 95 | static int netns_exec(int argc, char **argv) |
| 96 | { |
| 97 | /* Setup the proper environment for apps that are not netns |
| 98 | * aware, and execute a program in that environment. |
| 99 | */ |
| 100 | const char *cmd; |
| 101 | |
| 102 | if (argc < 1 && !do_all) { |
| 103 | fprintf(stderr, "No netns name specified\n"); |
| 104 | return -1; |
| 105 | } |
| 106 | if ((argc < 2 && !do_all) || (argc < 1 && do_all)) { |
| 107 | fprintf(stderr, "No command specified\n"); |
| 108 | return -1; |
| 109 | } |
| 110 | |
| 111 | if (do_all) |
| 112 | return do_each_netns(on_netns_exec, --argv, 1); |
| 113 | |
| 114 | if (netns_switch(argv[0])) |
| 115 | return -1; |
| 116 | |
| 117 | /* ip must return the status of the child, |
| 118 | * but do_cmd() will add a minus to this, |
| 119 | * so let's add another one here to cancel it. |
| 120 | */ |
| 121 | cmd = argv[1]; |
| 122 | return -cmd_exec(cmd, argv + 1, !!batch_mode); |
| 123 | } |
| 124 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 125 | static int is_pid(const char *str) |
| 126 | { |
| 127 | int ch; |
| 128 | for (; (ch = *str); str++) { |
| 129 | if (!isdigit(ch)) |
| 130 | return 0; |
| 131 | } |
| 132 | return 1; |
| 133 | } |
| 134 | |
| 135 | static int netns_pids(int argc, char **argv) |
| 136 | { |
| 137 | const char *name; |
| 138 | char net_path[MAXPATHLEN]; |
| 139 | int netns; |
| 140 | struct stat netst; |
| 141 | DIR *dir; |
| 142 | struct dirent *entry; |
| 143 | |
| 144 | if (argc < 1) { |
| 145 | fprintf(stderr, "No netns name specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 146 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 147 | } |
| 148 | if (argc > 1) { |
| 149 | fprintf(stderr, "extra arguments specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 150 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 151 | } |
| 152 | |
| 153 | name = argv[0]; |
| 154 | snprintf(net_path, sizeof(net_path), "%s/%s", NETNS_RUN_DIR, name); |
| 155 | netns = open(net_path, O_RDONLY); |
| 156 | if (netns < 0) { |
| 157 | fprintf(stderr, "Cannot open network namespace: %s\n", |
| 158 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 159 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 160 | } |
| 161 | if (fstat(netns, &netst) < 0) { |
| 162 | fprintf(stderr, "Stat of netns failed: %s\n", |
| 163 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 164 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 165 | } |
| 166 | dir = opendir("/proc/"); |
| 167 | if (!dir) { |
| 168 | fprintf(stderr, "Open of /proc failed: %s\n", |
| 169 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 170 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 171 | } |
| 172 | while((entry = readdir(dir))) { |
| 173 | char pid_net_path[MAXPATHLEN]; |
| 174 | struct stat st; |
| 175 | if (!is_pid(entry->d_name)) |
| 176 | continue; |
| 177 | snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%s/ns/net", |
| 178 | entry->d_name); |
| 179 | if (stat(pid_net_path, &st) != 0) |
| 180 | continue; |
| 181 | if ((st.st_dev == netst.st_dev) && |
| 182 | (st.st_ino == netst.st_ino)) { |
| 183 | printf("%s\n", entry->d_name); |
| 184 | } |
| 185 | } |
| 186 | closedir(dir); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 187 | return 0; |
Stephen Hemminger | 0612519 | 2014-02-17 10:55:31 -0800 | [diff] [blame] | 188 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 189 | } |
| 190 | |
| 191 | static int netns_identify(int argc, char **argv) |
| 192 | { |
| 193 | const char *pidstr; |
| 194 | char net_path[MAXPATHLEN]; |
| 195 | int netns; |
| 196 | struct stat netst; |
| 197 | DIR *dir; |
| 198 | struct dirent *entry; |
| 199 | |
| 200 | if (argc < 1) { |
vadimk | 0948adc | 2014-11-07 18:25:30 +0200 | [diff] [blame] | 201 | pidstr = "self"; |
| 202 | } else if (argc > 1) { |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 203 | fprintf(stderr, "extra arguments specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 204 | return -1; |
vadimk | 0948adc | 2014-11-07 18:25:30 +0200 | [diff] [blame] | 205 | } else { |
| 206 | pidstr = argv[0]; |
| 207 | if (!is_pid(pidstr)) { |
| 208 | fprintf(stderr, "Specified string '%s' is not a pid\n", |
| 209 | pidstr); |
| 210 | return -1; |
| 211 | } |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | snprintf(net_path, sizeof(net_path), "/proc/%s/ns/net", pidstr); |
| 215 | netns = open(net_path, O_RDONLY); |
| 216 | if (netns < 0) { |
| 217 | fprintf(stderr, "Cannot open network namespace: %s\n", |
| 218 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 219 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 220 | } |
| 221 | if (fstat(netns, &netst) < 0) { |
| 222 | fprintf(stderr, "Stat of netns failed: %s\n", |
| 223 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 224 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 225 | } |
| 226 | dir = opendir(NETNS_RUN_DIR); |
| 227 | if (!dir) { |
| 228 | /* Succeed treat a missing directory as an empty directory */ |
| 229 | if (errno == ENOENT) |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 230 | return 0; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 231 | |
| 232 | fprintf(stderr, "Failed to open directory %s:%s\n", |
| 233 | NETNS_RUN_DIR, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 234 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 235 | } |
| 236 | |
| 237 | while((entry = readdir(dir))) { |
| 238 | char name_path[MAXPATHLEN]; |
| 239 | struct stat st; |
| 240 | |
| 241 | if (strcmp(entry->d_name, ".") == 0) |
| 242 | continue; |
| 243 | if (strcmp(entry->d_name, "..") == 0) |
| 244 | continue; |
| 245 | |
| 246 | snprintf(name_path, sizeof(name_path), "%s/%s", NETNS_RUN_DIR, |
| 247 | entry->d_name); |
| 248 | |
| 249 | if (stat(name_path, &st) != 0) |
| 250 | continue; |
| 251 | |
| 252 | if ((st.st_dev == netst.st_dev) && |
| 253 | (st.st_ino == netst.st_ino)) { |
| 254 | printf("%s\n", entry->d_name); |
| 255 | } |
| 256 | } |
| 257 | closedir(dir); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 258 | return 0; |
Stephen Hemminger | 0612519 | 2014-02-17 10:55:31 -0800 | [diff] [blame] | 259 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 260 | } |
| 261 | |
Vadim Kochan | 3372493 | 2015-01-18 16:10:19 +0200 | [diff] [blame^] | 262 | static int on_netns_del(char *nsname, void *arg) |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 263 | { |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 264 | char netns_path[MAXPATHLEN]; |
| 265 | |
Vadim Kochan | 3372493 | 2015-01-18 16:10:19 +0200 | [diff] [blame^] | 266 | snprintf(netns_path, sizeof(netns_path), "%s/%s", NETNS_RUN_DIR, nsname); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 267 | umount2(netns_path, MNT_DETACH); |
| 268 | if (unlink(netns_path) < 0) { |
Kees van Reeuwijk | 14645ec | 2013-02-08 03:32:36 +0000 | [diff] [blame] | 269 | fprintf(stderr, "Cannot remove namespace file \"%s\": %s\n", |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 270 | netns_path, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 271 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 272 | } |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 273 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 274 | } |
| 275 | |
Vadim Kochan | 3372493 | 2015-01-18 16:10:19 +0200 | [diff] [blame^] | 276 | static int netns_delete(int argc, char **argv) |
| 277 | { |
| 278 | if (argc < 1 && !do_all) { |
| 279 | fprintf(stderr, "No netns name specified\n"); |
| 280 | return -1; |
| 281 | } |
| 282 | |
| 283 | if (do_all) |
| 284 | return netns_foreach(on_netns_del, NULL); |
| 285 | |
| 286 | return on_netns_del(argv[0], NULL); |
| 287 | } |
| 288 | |
vadimk | c1cbb18 | 2014-08-31 22:45:29 +0300 | [diff] [blame] | 289 | static int create_netns_dir(void) |
| 290 | { |
| 291 | /* Create the base netns directory if it doesn't exist */ |
| 292 | if (mkdir(NETNS_RUN_DIR, S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)) { |
| 293 | if (errno != EEXIST) { |
| 294 | fprintf(stderr, "mkdir %s failed: %s\n", |
| 295 | NETNS_RUN_DIR, strerror(errno)); |
| 296 | return -1; |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | return 0; |
| 301 | } |
| 302 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 303 | static int netns_add(int argc, char **argv) |
| 304 | { |
| 305 | /* This function creates a new network namespace and |
| 306 | * a new mount namespace and bind them into a well known |
| 307 | * location in the filesystem based on the name provided. |
| 308 | * |
| 309 | * The mount namespace is created so that any necessary |
| 310 | * userspace tweaks like remounting /sys, or bind mounting |
| 311 | * a new /etc/resolv.conf can be shared between uers. |
| 312 | */ |
| 313 | char netns_path[MAXPATHLEN]; |
| 314 | const char *name; |
Eric W. Biederman | 223f4d8 | 2011-07-15 14:29:41 +0000 | [diff] [blame] | 315 | int fd; |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 316 | int made_netns_run_dir_mount = 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 317 | |
| 318 | if (argc < 1) { |
| 319 | fprintf(stderr, "No netns name specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 320 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 321 | } |
| 322 | name = argv[0]; |
| 323 | |
| 324 | snprintf(netns_path, sizeof(netns_path), "%s/%s", NETNS_RUN_DIR, name); |
| 325 | |
vadimk | c1cbb18 | 2014-08-31 22:45:29 +0300 | [diff] [blame] | 326 | if (create_netns_dir()) |
| 327 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 328 | |
Stephen Hemminger | d259f03 | 2013-08-04 15:00:56 -0700 | [diff] [blame] | 329 | /* Make it possible for network namespace mounts to propagate between |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 330 | * mount namespaces. This makes it likely that a unmounting a network |
| 331 | * namespace file in one namespace will unmount the network namespace |
| 332 | * file in all namespaces allowing the network namespace to be freed |
| 333 | * sooner. |
| 334 | */ |
| 335 | while (mount("", NETNS_RUN_DIR, "none", MS_SHARED | MS_REC, NULL)) { |
| 336 | /* Fail unless we need to make the mount point */ |
| 337 | if (errno != EINVAL || made_netns_run_dir_mount) { |
| 338 | fprintf(stderr, "mount --make-shared %s failed: %s\n", |
| 339 | NETNS_RUN_DIR, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 340 | return -1; |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | /* Upgrade NETNS_RUN_DIR to a mount point */ |
| 344 | if (mount(NETNS_RUN_DIR, NETNS_RUN_DIR, "none", MS_BIND, NULL)) { |
| 345 | fprintf(stderr, "mount --bind %s %s failed: %s\n", |
| 346 | NETNS_RUN_DIR, NETNS_RUN_DIR, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 347 | return -1; |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 348 | } |
| 349 | made_netns_run_dir_mount = 1; |
| 350 | } |
| 351 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 352 | /* Create the filesystem state */ |
Eric W. Biederman | 223f4d8 | 2011-07-15 14:29:41 +0000 | [diff] [blame] | 353 | fd = open(netns_path, O_RDONLY|O_CREAT|O_EXCL, 0); |
| 354 | if (fd < 0) { |
Mike Rapoport | 55713c8 | 2014-05-11 12:21:26 +0300 | [diff] [blame] | 355 | fprintf(stderr, "Cannot create namespace file \"%s\": %s\n", |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 356 | netns_path, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 357 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 358 | } |
Eric W. Biederman | 223f4d8 | 2011-07-15 14:29:41 +0000 | [diff] [blame] | 359 | close(fd); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 360 | if (unshare(CLONE_NEWNET) < 0) { |
Kees van Reeuwijk | 14645ec | 2013-02-08 03:32:36 +0000 | [diff] [blame] | 361 | fprintf(stderr, "Failed to create a new network namespace \"%s\": %s\n", |
| 362 | name, strerror(errno)); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 363 | goto out_delete; |
| 364 | } |
| 365 | |
| 366 | /* Bind the netns last so I can watch for it */ |
| 367 | if (mount("/proc/self/ns/net", netns_path, "none", MS_BIND, NULL) < 0) { |
| 368 | fprintf(stderr, "Bind /proc/self/ns/net -> %s failed: %s\n", |
| 369 | netns_path, strerror(errno)); |
| 370 | goto out_delete; |
| 371 | } |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 372 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 373 | out_delete: |
| 374 | netns_delete(argc, argv); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 375 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 376 | } |
| 377 | |
| 378 | |
| 379 | static int netns_monitor(int argc, char **argv) |
| 380 | { |
| 381 | char buf[4096]; |
| 382 | struct inotify_event *event; |
| 383 | int fd; |
| 384 | fd = inotify_init(); |
| 385 | if (fd < 0) { |
| 386 | fprintf(stderr, "inotify_init failed: %s\n", |
| 387 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 388 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 389 | } |
vadimk | c1cbb18 | 2014-08-31 22:45:29 +0300 | [diff] [blame] | 390 | |
| 391 | if (create_netns_dir()) |
| 392 | return -1; |
| 393 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 394 | if (inotify_add_watch(fd, NETNS_RUN_DIR, IN_CREATE | IN_DELETE) < 0) { |
| 395 | fprintf(stderr, "inotify_add_watch failed: %s\n", |
| 396 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 397 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 398 | } |
| 399 | for(;;) { |
| 400 | ssize_t len = read(fd, buf, sizeof(buf)); |
| 401 | if (len < 0) { |
| 402 | fprintf(stderr, "read failed: %s\n", |
| 403 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 404 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 405 | } |
| 406 | for (event = (struct inotify_event *)buf; |
| 407 | (char *)event < &buf[len]; |
| 408 | event = (struct inotify_event *)((char *)event + sizeof(*event) + event->len)) { |
| 409 | if (event->mask & IN_CREATE) |
| 410 | printf("add %s\n", event->name); |
| 411 | if (event->mask & IN_DELETE) |
| 412 | printf("delete %s\n", event->name); |
| 413 | } |
| 414 | } |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 415 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 416 | } |
| 417 | |
| 418 | int do_netns(int argc, char **argv) |
| 419 | { |
| 420 | if (argc < 1) |
| 421 | return netns_list(0, NULL); |
| 422 | |
| 423 | if ((matches(*argv, "list") == 0) || (matches(*argv, "show") == 0) || |
| 424 | (matches(*argv, "lst") == 0)) |
| 425 | return netns_list(argc-1, argv+1); |
| 426 | |
| 427 | if (matches(*argv, "help") == 0) |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 428 | return usage(); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 429 | |
| 430 | if (matches(*argv, "add") == 0) |
| 431 | return netns_add(argc-1, argv+1); |
| 432 | |
| 433 | if (matches(*argv, "delete") == 0) |
| 434 | return netns_delete(argc-1, argv+1); |
| 435 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 436 | if (matches(*argv, "identify") == 0) |
| 437 | return netns_identify(argc-1, argv+1); |
| 438 | |
| 439 | if (matches(*argv, "pids") == 0) |
| 440 | return netns_pids(argc-1, argv+1); |
| 441 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 442 | if (matches(*argv, "exec") == 0) |
| 443 | return netns_exec(argc-1, argv+1); |
| 444 | |
| 445 | if (matches(*argv, "monitor") == 0) |
| 446 | return netns_monitor(argc-1, argv+1); |
| 447 | |
| 448 | fprintf(stderr, "Command \"%s\" is unknown, try \"ip netns help\".\n", *argv); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 449 | exit(-1); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 450 | } |