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"); |
| 26 | fprintf(stderr, " ip 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"); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 29 | fprintf(stderr, " ip netns exec NAME cmd ...\n"); |
| 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 | |
| 34 | int get_netns_fd(const char *name) |
| 35 | { |
| 36 | char pathbuf[MAXPATHLEN]; |
| 37 | const char *path, *ptr; |
| 38 | |
| 39 | path = name; |
| 40 | ptr = strchr(name, '/'); |
| 41 | if (!ptr) { |
| 42 | snprintf(pathbuf, sizeof(pathbuf), "%s/%s", |
| 43 | NETNS_RUN_DIR, name ); |
| 44 | path = pathbuf; |
| 45 | } |
| 46 | return open(path, O_RDONLY); |
| 47 | } |
| 48 | |
| 49 | static int netns_list(int argc, char **argv) |
| 50 | { |
| 51 | struct dirent *entry; |
| 52 | DIR *dir; |
| 53 | |
| 54 | dir = opendir(NETNS_RUN_DIR); |
| 55 | if (!dir) |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 56 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 57 | |
| 58 | while ((entry = readdir(dir)) != NULL) { |
| 59 | if (strcmp(entry->d_name, ".") == 0) |
| 60 | continue; |
| 61 | if (strcmp(entry->d_name, "..") == 0) |
| 62 | continue; |
| 63 | printf("%s\n", entry->d_name); |
| 64 | } |
| 65 | closedir(dir); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 66 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 67 | } |
| 68 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 69 | static int netns_exec(int argc, char **argv) |
| 70 | { |
| 71 | /* Setup the proper environment for apps that are not netns |
| 72 | * aware, and execute a program in that environment. |
| 73 | */ |
Vadim Kochan | eb67e44 | 2014-12-24 23:04:08 +0200 | [diff] [blame^] | 74 | const char *cmd; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 75 | |
| 76 | if (argc < 1) { |
| 77 | fprintf(stderr, "No netns name specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 78 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 79 | } |
| 80 | if (argc < 2) { |
Kees van Reeuwijk | 14645ec | 2013-02-08 03:32:36 +0000 | [diff] [blame] | 81 | fprintf(stderr, "No command specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 82 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 83 | } |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 84 | cmd = argv[1]; |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 85 | |
Vadim Kochan | eb67e44 | 2014-12-24 23:04:08 +0200 | [diff] [blame^] | 86 | if (netns_switch(argv[0])) |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 87 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 88 | |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 89 | fflush(stdout); |
| 90 | |
Stephen Hemminger | a3aa47a | 2013-07-16 10:04:05 -0700 | [diff] [blame] | 91 | if (batch_mode) { |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 92 | int status; |
| 93 | pid_t pid; |
| 94 | |
| 95 | pid = fork(); |
| 96 | if (pid < 0) { |
| 97 | perror("fork"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 98 | exit(1); |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | if (pid != 0) { |
| 102 | /* Parent */ |
| 103 | if (waitpid(pid, &status, 0) < 0) { |
| 104 | perror("waitpid"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 105 | exit(1); |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 106 | } |
| 107 | |
Nicolas Dichtel | 3c61c01 | 2013-08-29 14:29:07 +0200 | [diff] [blame] | 108 | if (WIFEXITED(status)) { |
| 109 | /* ip must return the status of the child, |
| 110 | * but do_cmd() will add a minus to this, |
| 111 | * so let's add another one here to cancel it. |
| 112 | */ |
| 113 | return -WEXITSTATUS(status); |
| 114 | } |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 115 | |
Nicolas Dichtel | 3c61c01 | 2013-08-29 14:29:07 +0200 | [diff] [blame] | 116 | exit(1); |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 117 | } |
| 118 | } |
| 119 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 120 | if (execvp(cmd, argv + 1) < 0) |
Kees van Reeuwijk | 14645ec | 2013-02-08 03:32:36 +0000 | [diff] [blame] | 121 | fprintf(stderr, "exec of \"%s\" failed: %s\n", |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 122 | cmd, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 123 | _exit(1); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 124 | } |
| 125 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 126 | static int is_pid(const char *str) |
| 127 | { |
| 128 | int ch; |
| 129 | for (; (ch = *str); str++) { |
| 130 | if (!isdigit(ch)) |
| 131 | return 0; |
| 132 | } |
| 133 | return 1; |
| 134 | } |
| 135 | |
| 136 | static int netns_pids(int argc, char **argv) |
| 137 | { |
| 138 | const char *name; |
| 139 | char net_path[MAXPATHLEN]; |
| 140 | int netns; |
| 141 | struct stat netst; |
| 142 | DIR *dir; |
| 143 | struct dirent *entry; |
| 144 | |
| 145 | if (argc < 1) { |
| 146 | fprintf(stderr, "No netns name specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 147 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 148 | } |
| 149 | if (argc > 1) { |
| 150 | fprintf(stderr, "extra arguments specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 151 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 152 | } |
| 153 | |
| 154 | name = argv[0]; |
| 155 | snprintf(net_path, sizeof(net_path), "%s/%s", NETNS_RUN_DIR, name); |
| 156 | netns = open(net_path, O_RDONLY); |
| 157 | if (netns < 0) { |
| 158 | fprintf(stderr, "Cannot open network namespace: %s\n", |
| 159 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 160 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 161 | } |
| 162 | if (fstat(netns, &netst) < 0) { |
| 163 | fprintf(stderr, "Stat of netns failed: %s\n", |
| 164 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 165 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 166 | } |
| 167 | dir = opendir("/proc/"); |
| 168 | if (!dir) { |
| 169 | fprintf(stderr, "Open of /proc failed: %s\n", |
| 170 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 171 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 172 | } |
| 173 | while((entry = readdir(dir))) { |
| 174 | char pid_net_path[MAXPATHLEN]; |
| 175 | struct stat st; |
| 176 | if (!is_pid(entry->d_name)) |
| 177 | continue; |
| 178 | snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%s/ns/net", |
| 179 | entry->d_name); |
| 180 | if (stat(pid_net_path, &st) != 0) |
| 181 | continue; |
| 182 | if ((st.st_dev == netst.st_dev) && |
| 183 | (st.st_ino == netst.st_ino)) { |
| 184 | printf("%s\n", entry->d_name); |
| 185 | } |
| 186 | } |
| 187 | closedir(dir); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 188 | return 0; |
Stephen Hemminger | 0612519 | 2014-02-17 10:55:31 -0800 | [diff] [blame] | 189 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | static int netns_identify(int argc, char **argv) |
| 193 | { |
| 194 | const char *pidstr; |
| 195 | char net_path[MAXPATHLEN]; |
| 196 | int netns; |
| 197 | struct stat netst; |
| 198 | DIR *dir; |
| 199 | struct dirent *entry; |
| 200 | |
| 201 | if (argc < 1) { |
vadimk | 0948adc | 2014-11-07 18:25:30 +0200 | [diff] [blame] | 202 | pidstr = "self"; |
| 203 | } else if (argc > 1) { |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 204 | fprintf(stderr, "extra arguments specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 205 | return -1; |
vadimk | 0948adc | 2014-11-07 18:25:30 +0200 | [diff] [blame] | 206 | } else { |
| 207 | pidstr = argv[0]; |
| 208 | if (!is_pid(pidstr)) { |
| 209 | fprintf(stderr, "Specified string '%s' is not a pid\n", |
| 210 | pidstr); |
| 211 | return -1; |
| 212 | } |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 213 | } |
| 214 | |
| 215 | snprintf(net_path, sizeof(net_path), "/proc/%s/ns/net", pidstr); |
| 216 | netns = open(net_path, O_RDONLY); |
| 217 | if (netns < 0) { |
| 218 | fprintf(stderr, "Cannot open network namespace: %s\n", |
| 219 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 220 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 221 | } |
| 222 | if (fstat(netns, &netst) < 0) { |
| 223 | fprintf(stderr, "Stat of netns failed: %s\n", |
| 224 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 225 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 226 | } |
| 227 | dir = opendir(NETNS_RUN_DIR); |
| 228 | if (!dir) { |
| 229 | /* Succeed treat a missing directory as an empty directory */ |
| 230 | if (errno == ENOENT) |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 231 | return 0; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 232 | |
| 233 | fprintf(stderr, "Failed to open directory %s:%s\n", |
| 234 | NETNS_RUN_DIR, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 235 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 236 | } |
| 237 | |
| 238 | while((entry = readdir(dir))) { |
| 239 | char name_path[MAXPATHLEN]; |
| 240 | struct stat st; |
| 241 | |
| 242 | if (strcmp(entry->d_name, ".") == 0) |
| 243 | continue; |
| 244 | if (strcmp(entry->d_name, "..") == 0) |
| 245 | continue; |
| 246 | |
| 247 | snprintf(name_path, sizeof(name_path), "%s/%s", NETNS_RUN_DIR, |
| 248 | entry->d_name); |
| 249 | |
| 250 | if (stat(name_path, &st) != 0) |
| 251 | continue; |
| 252 | |
| 253 | if ((st.st_dev == netst.st_dev) && |
| 254 | (st.st_ino == netst.st_ino)) { |
| 255 | printf("%s\n", entry->d_name); |
| 256 | } |
| 257 | } |
| 258 | closedir(dir); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 259 | return 0; |
Stephen Hemminger | 0612519 | 2014-02-17 10:55:31 -0800 | [diff] [blame] | 260 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 261 | } |
| 262 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 263 | static int netns_delete(int argc, char **argv) |
| 264 | { |
| 265 | const char *name; |
| 266 | char netns_path[MAXPATHLEN]; |
| 267 | |
| 268 | if (argc < 1) { |
| 269 | fprintf(stderr, "No netns name specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 270 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 271 | } |
| 272 | |
| 273 | name = argv[0]; |
| 274 | snprintf(netns_path, sizeof(netns_path), "%s/%s", NETNS_RUN_DIR, name); |
| 275 | umount2(netns_path, MNT_DETACH); |
| 276 | if (unlink(netns_path) < 0) { |
Kees van Reeuwijk | 14645ec | 2013-02-08 03:32:36 +0000 | [diff] [blame] | 277 | fprintf(stderr, "Cannot remove namespace file \"%s\": %s\n", |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 278 | netns_path, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 279 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 280 | } |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 281 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 282 | } |
| 283 | |
vadimk | c1cbb18 | 2014-08-31 22:45:29 +0300 | [diff] [blame] | 284 | static int create_netns_dir(void) |
| 285 | { |
| 286 | /* Create the base netns directory if it doesn't exist */ |
| 287 | if (mkdir(NETNS_RUN_DIR, S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)) { |
| 288 | if (errno != EEXIST) { |
| 289 | fprintf(stderr, "mkdir %s failed: %s\n", |
| 290 | NETNS_RUN_DIR, strerror(errno)); |
| 291 | return -1; |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | return 0; |
| 296 | } |
| 297 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 298 | static int netns_add(int argc, char **argv) |
| 299 | { |
| 300 | /* This function creates a new network namespace and |
| 301 | * a new mount namespace and bind them into a well known |
| 302 | * location in the filesystem based on the name provided. |
| 303 | * |
| 304 | * The mount namespace is created so that any necessary |
| 305 | * userspace tweaks like remounting /sys, or bind mounting |
| 306 | * a new /etc/resolv.conf can be shared between uers. |
| 307 | */ |
| 308 | char netns_path[MAXPATHLEN]; |
| 309 | const char *name; |
Eric W. Biederman | 223f4d8 | 2011-07-15 14:29:41 +0000 | [diff] [blame] | 310 | int fd; |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 311 | int made_netns_run_dir_mount = 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 312 | |
| 313 | if (argc < 1) { |
| 314 | fprintf(stderr, "No netns name specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 315 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 316 | } |
| 317 | name = argv[0]; |
| 318 | |
| 319 | snprintf(netns_path, sizeof(netns_path), "%s/%s", NETNS_RUN_DIR, name); |
| 320 | |
vadimk | c1cbb18 | 2014-08-31 22:45:29 +0300 | [diff] [blame] | 321 | if (create_netns_dir()) |
| 322 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 323 | |
Stephen Hemminger | d259f03 | 2013-08-04 15:00:56 -0700 | [diff] [blame] | 324 | /* Make it possible for network namespace mounts to propagate between |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 325 | * mount namespaces. This makes it likely that a unmounting a network |
| 326 | * namespace file in one namespace will unmount the network namespace |
| 327 | * file in all namespaces allowing the network namespace to be freed |
| 328 | * sooner. |
| 329 | */ |
| 330 | while (mount("", NETNS_RUN_DIR, "none", MS_SHARED | MS_REC, NULL)) { |
| 331 | /* Fail unless we need to make the mount point */ |
| 332 | if (errno != EINVAL || made_netns_run_dir_mount) { |
| 333 | fprintf(stderr, "mount --make-shared %s failed: %s\n", |
| 334 | NETNS_RUN_DIR, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 335 | return -1; |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | /* Upgrade NETNS_RUN_DIR to a mount point */ |
| 339 | if (mount(NETNS_RUN_DIR, NETNS_RUN_DIR, "none", MS_BIND, NULL)) { |
| 340 | fprintf(stderr, "mount --bind %s %s failed: %s\n", |
| 341 | NETNS_RUN_DIR, NETNS_RUN_DIR, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 342 | return -1; |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 343 | } |
| 344 | made_netns_run_dir_mount = 1; |
| 345 | } |
| 346 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 347 | /* Create the filesystem state */ |
Eric W. Biederman | 223f4d8 | 2011-07-15 14:29:41 +0000 | [diff] [blame] | 348 | fd = open(netns_path, O_RDONLY|O_CREAT|O_EXCL, 0); |
| 349 | if (fd < 0) { |
Mike Rapoport | 55713c8 | 2014-05-11 12:21:26 +0300 | [diff] [blame] | 350 | fprintf(stderr, "Cannot create namespace file \"%s\": %s\n", |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 351 | netns_path, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 352 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 353 | } |
Eric W. Biederman | 223f4d8 | 2011-07-15 14:29:41 +0000 | [diff] [blame] | 354 | close(fd); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 355 | if (unshare(CLONE_NEWNET) < 0) { |
Kees van Reeuwijk | 14645ec | 2013-02-08 03:32:36 +0000 | [diff] [blame] | 356 | fprintf(stderr, "Failed to create a new network namespace \"%s\": %s\n", |
| 357 | name, strerror(errno)); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 358 | goto out_delete; |
| 359 | } |
| 360 | |
| 361 | /* Bind the netns last so I can watch for it */ |
| 362 | if (mount("/proc/self/ns/net", netns_path, "none", MS_BIND, NULL) < 0) { |
| 363 | fprintf(stderr, "Bind /proc/self/ns/net -> %s failed: %s\n", |
| 364 | netns_path, strerror(errno)); |
| 365 | goto out_delete; |
| 366 | } |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 367 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 368 | out_delete: |
| 369 | netns_delete(argc, argv); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 370 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 371 | } |
| 372 | |
| 373 | |
| 374 | static int netns_monitor(int argc, char **argv) |
| 375 | { |
| 376 | char buf[4096]; |
| 377 | struct inotify_event *event; |
| 378 | int fd; |
| 379 | fd = inotify_init(); |
| 380 | if (fd < 0) { |
| 381 | fprintf(stderr, "inotify_init failed: %s\n", |
| 382 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 383 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 384 | } |
vadimk | c1cbb18 | 2014-08-31 22:45:29 +0300 | [diff] [blame] | 385 | |
| 386 | if (create_netns_dir()) |
| 387 | return -1; |
| 388 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 389 | if (inotify_add_watch(fd, NETNS_RUN_DIR, IN_CREATE | IN_DELETE) < 0) { |
| 390 | fprintf(stderr, "inotify_add_watch failed: %s\n", |
| 391 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 392 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 393 | } |
| 394 | for(;;) { |
| 395 | ssize_t len = read(fd, buf, sizeof(buf)); |
| 396 | if (len < 0) { |
| 397 | fprintf(stderr, "read failed: %s\n", |
| 398 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 399 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 400 | } |
| 401 | for (event = (struct inotify_event *)buf; |
| 402 | (char *)event < &buf[len]; |
| 403 | event = (struct inotify_event *)((char *)event + sizeof(*event) + event->len)) { |
| 404 | if (event->mask & IN_CREATE) |
| 405 | printf("add %s\n", event->name); |
| 406 | if (event->mask & IN_DELETE) |
| 407 | printf("delete %s\n", event->name); |
| 408 | } |
| 409 | } |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 410 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 411 | } |
| 412 | |
| 413 | int do_netns(int argc, char **argv) |
| 414 | { |
| 415 | if (argc < 1) |
| 416 | return netns_list(0, NULL); |
| 417 | |
| 418 | if ((matches(*argv, "list") == 0) || (matches(*argv, "show") == 0) || |
| 419 | (matches(*argv, "lst") == 0)) |
| 420 | return netns_list(argc-1, argv+1); |
| 421 | |
| 422 | if (matches(*argv, "help") == 0) |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 423 | return usage(); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 424 | |
| 425 | if (matches(*argv, "add") == 0) |
| 426 | return netns_add(argc-1, argv+1); |
| 427 | |
| 428 | if (matches(*argv, "delete") == 0) |
| 429 | return netns_delete(argc-1, argv+1); |
| 430 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 431 | if (matches(*argv, "identify") == 0) |
| 432 | return netns_identify(argc-1, argv+1); |
| 433 | |
| 434 | if (matches(*argv, "pids") == 0) |
| 435 | return netns_pids(argc-1, argv+1); |
| 436 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 437 | if (matches(*argv, "exec") == 0) |
| 438 | return netns_exec(argc-1, argv+1); |
| 439 | |
| 440 | if (matches(*argv, "monitor") == 0) |
| 441 | return netns_monitor(argc-1, argv+1); |
| 442 | |
| 443 | fprintf(stderr, "Command \"%s\" is unknown, try \"ip netns help\".\n", *argv); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 444 | exit(-1); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 445 | } |