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> |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 7 | #include <sys/syscall.h> |
| 8 | #include <stdio.h> |
| 9 | #include <string.h> |
| 10 | #include <sched.h> |
| 11 | #include <fcntl.h> |
| 12 | #include <dirent.h> |
| 13 | #include <errno.h> |
| 14 | #include <unistd.h> |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 15 | #include <ctype.h> |
Nicolas Dichtel | d652ccb | 2015-04-15 14:23:22 +0200 | [diff] [blame] | 16 | #include <linux/limits.h> |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 17 | |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 18 | #include <linux/net_namespace.h> |
| 19 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 20 | #include "utils.h" |
Jiri Pirko | 4952b45 | 2016-03-22 10:02:20 +0100 | [diff] [blame] | 21 | #include "list.h" |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 22 | #include "ip_common.h" |
Vadim Kochan | eb67e44 | 2014-12-24 23:04:08 +0200 | [diff] [blame] | 23 | #include "namespace.h" |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 24 | |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 25 | static int usage(void) |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 26 | { |
| 27 | fprintf(stderr, "Usage: ip netns list\n"); |
| 28 | fprintf(stderr, " ip netns add NAME\n"); |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 29 | fprintf(stderr, " ip netns set NAME NETNSID\n"); |
Vadim Kochan | 3372493 | 2015-01-18 16:10:19 +0200 | [diff] [blame] | 30 | fprintf(stderr, " ip [-all] netns delete [NAME]\n"); |
vadimk | 0948adc | 2014-11-07 18:25:30 +0200 | [diff] [blame] | 31 | fprintf(stderr, " ip netns identify [PID]\n"); |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 32 | fprintf(stderr, " ip netns pids NAME\n"); |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 33 | fprintf(stderr, " ip [-all] netns exec [NAME] cmd ...\n"); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 34 | fprintf(stderr, " ip netns monitor\n"); |
Nicolas Dichtel | d652ccb | 2015-04-15 14:23:22 +0200 | [diff] [blame] | 35 | fprintf(stderr, " ip netns list-id\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 36 | exit(-1); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 37 | } |
| 38 | |
Nicolas Dichtel | d652ccb | 2015-04-15 14:23:22 +0200 | [diff] [blame] | 39 | /* This socket is used to get nsid */ |
| 40 | static struct rtnl_handle rtnsh = { .fd = -1 }; |
| 41 | |
Nicolas Dichtel | 4c7d9a5 | 2015-04-13 10:34:26 +0200 | [diff] [blame] | 42 | static int have_rtnl_getnsid = -1; |
| 43 | |
| 44 | static int ipnetns_accept_msg(const struct sockaddr_nl *who, |
Nicolas Dichtel | 0628cdd | 2015-05-20 16:19:58 +0200 | [diff] [blame] | 45 | struct rtnl_ctrl_data *ctrl, |
Nicolas Dichtel | 4c7d9a5 | 2015-04-13 10:34:26 +0200 | [diff] [blame] | 46 | struct nlmsghdr *n, void *arg) |
| 47 | { |
| 48 | struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(n); |
| 49 | |
| 50 | if (n->nlmsg_type == NLMSG_ERROR && |
| 51 | (err->error == -EOPNOTSUPP || err->error == -EINVAL)) |
| 52 | have_rtnl_getnsid = 0; |
| 53 | else |
| 54 | have_rtnl_getnsid = 1; |
| 55 | return -1; |
| 56 | } |
| 57 | |
| 58 | static int ipnetns_have_nsid(void) |
| 59 | { |
| 60 | struct { |
| 61 | struct nlmsghdr n; |
| 62 | struct rtgenmsg g; |
| 63 | char buf[1024]; |
| 64 | } req; |
| 65 | int fd; |
| 66 | |
| 67 | if (have_rtnl_getnsid < 0) { |
| 68 | memset(&req, 0, sizeof(req)); |
| 69 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)); |
| 70 | req.n.nlmsg_flags = NLM_F_REQUEST; |
| 71 | req.n.nlmsg_type = RTM_GETNSID; |
| 72 | req.g.rtgen_family = AF_UNSPEC; |
| 73 | |
| 74 | fd = open("/proc/self/ns/net", O_RDONLY); |
| 75 | if (fd < 0) { |
| 76 | perror("open(\"/proc/self/ns/net\")"); |
| 77 | exit(1); |
| 78 | } |
| 79 | |
| 80 | addattr32(&req.n, 1024, NETNSA_FD, fd); |
| 81 | |
| 82 | if (rtnl_send(&rth, &req.n, req.n.nlmsg_len) < 0) { |
| 83 | perror("request send failed"); |
| 84 | exit(1); |
| 85 | } |
| 86 | rtnl_listen(&rth, ipnetns_accept_msg, NULL); |
| 87 | close(fd); |
| 88 | } |
| 89 | |
| 90 | return have_rtnl_getnsid; |
| 91 | } |
| 92 | |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 93 | static int get_netnsid_from_name(const char *name) |
| 94 | { |
| 95 | struct { |
| 96 | struct nlmsghdr n; |
| 97 | struct rtgenmsg g; |
| 98 | char buf[1024]; |
| 99 | } req, answer; |
| 100 | struct rtattr *tb[NETNSA_MAX + 1]; |
| 101 | struct rtgenmsg *rthdr; |
| 102 | int len, fd; |
| 103 | |
| 104 | memset(&req, 0, sizeof(req)); |
| 105 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)); |
| 106 | req.n.nlmsg_flags = NLM_F_REQUEST; |
| 107 | req.n.nlmsg_type = RTM_GETNSID; |
| 108 | req.g.rtgen_family = AF_UNSPEC; |
| 109 | |
| 110 | fd = netns_get_fd(name); |
| 111 | if (fd < 0) |
| 112 | return fd; |
| 113 | |
| 114 | addattr32(&req.n, 1024, NETNSA_FD, fd); |
Stephen Hemminger | c079e12 | 2015-05-27 12:26:14 -0700 | [diff] [blame] | 115 | if (rtnl_talk(&rtnsh, &req.n, &answer.n, sizeof(answer)) < 0) { |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 116 | close(fd); |
| 117 | return -2; |
| 118 | } |
| 119 | close(fd); |
| 120 | |
| 121 | /* Validate message and parse attributes */ |
| 122 | if (answer.n.nlmsg_type == NLMSG_ERROR) |
| 123 | return -1; |
| 124 | |
| 125 | rthdr = NLMSG_DATA(&answer.n); |
| 126 | len = answer.n.nlmsg_len - NLMSG_SPACE(sizeof(*rthdr)); |
| 127 | if (len < 0) |
| 128 | return -1; |
| 129 | |
| 130 | parse_rtattr(tb, NETNSA_MAX, NETNS_RTA(rthdr), len); |
| 131 | |
| 132 | if (tb[NETNSA_NSID]) |
| 133 | return rta_getattr_u32(tb[NETNSA_NSID]); |
| 134 | |
| 135 | return -1; |
| 136 | } |
| 137 | |
Nicolas Dichtel | d652ccb | 2015-04-15 14:23:22 +0200 | [diff] [blame] | 138 | struct nsid_cache { |
| 139 | struct hlist_node nsid_hash; |
| 140 | struct hlist_node name_hash; |
| 141 | int nsid; |
Stephen Hemminger | 2f29d6b | 2015-08-12 08:35:54 -0700 | [diff] [blame] | 142 | char name[0]; |
Nicolas Dichtel | d652ccb | 2015-04-15 14:23:22 +0200 | [diff] [blame] | 143 | }; |
| 144 | |
| 145 | #define NSIDMAP_SIZE 128 |
| 146 | #define NSID_HASH_NSID(nsid) (nsid & (NSIDMAP_SIZE - 1)) |
| 147 | #define NSID_HASH_NAME(name) (namehash(name) & (NSIDMAP_SIZE - 1)) |
| 148 | |
| 149 | static struct hlist_head nsid_head[NSIDMAP_SIZE]; |
| 150 | static struct hlist_head name_head[NSIDMAP_SIZE]; |
| 151 | |
| 152 | static struct nsid_cache *netns_map_get_by_nsid(int nsid) |
| 153 | { |
| 154 | uint32_t h = NSID_HASH_NSID(nsid); |
| 155 | struct hlist_node *n; |
| 156 | |
| 157 | hlist_for_each(n, &nsid_head[h]) { |
| 158 | struct nsid_cache *c = container_of(n, struct nsid_cache, |
| 159 | nsid_hash); |
| 160 | if (c->nsid == nsid) |
| 161 | return c; |
| 162 | } |
| 163 | |
| 164 | return NULL; |
| 165 | } |
| 166 | |
Stephen Hemminger | 2f29d6b | 2015-08-12 08:35:54 -0700 | [diff] [blame] | 167 | static int netns_map_add(int nsid, const char *name) |
Nicolas Dichtel | d652ccb | 2015-04-15 14:23:22 +0200 | [diff] [blame] | 168 | { |
| 169 | struct nsid_cache *c; |
| 170 | uint32_t h; |
| 171 | |
| 172 | if (netns_map_get_by_nsid(nsid) != NULL) |
| 173 | return -EEXIST; |
| 174 | |
Nicolas Cavallari | a1b4a27 | 2016-02-12 14:47:39 +0100 | [diff] [blame] | 175 | c = malloc(sizeof(*c) + strlen(name) + 1); |
Nicolas Dichtel | d652ccb | 2015-04-15 14:23:22 +0200 | [diff] [blame] | 176 | if (c == NULL) { |
| 177 | perror("malloc"); |
| 178 | return -ENOMEM; |
| 179 | } |
| 180 | c->nsid = nsid; |
| 181 | strcpy(c->name, name); |
| 182 | |
| 183 | h = NSID_HASH_NSID(nsid); |
| 184 | hlist_add_head(&c->nsid_hash, &nsid_head[h]); |
| 185 | |
| 186 | h = NSID_HASH_NAME(name); |
| 187 | hlist_add_head(&c->name_hash, &name_head[h]); |
| 188 | |
| 189 | return 0; |
| 190 | } |
| 191 | |
| 192 | static void netns_map_del(struct nsid_cache *c) |
| 193 | { |
| 194 | hlist_del(&c->name_hash); |
| 195 | hlist_del(&c->nsid_hash); |
| 196 | free(c); |
| 197 | } |
| 198 | |
| 199 | void netns_map_init(void) |
| 200 | { |
| 201 | static int initialized; |
| 202 | struct dirent *entry; |
| 203 | DIR *dir; |
| 204 | int nsid; |
| 205 | |
| 206 | if (initialized || !ipnetns_have_nsid()) |
| 207 | return; |
| 208 | |
| 209 | if (rtnl_open(&rtnsh, 0) < 0) { |
| 210 | fprintf(stderr, "Cannot open rtnetlink\n"); |
| 211 | exit(1); |
| 212 | } |
| 213 | |
| 214 | dir = opendir(NETNS_RUN_DIR); |
| 215 | if (!dir) |
| 216 | return; |
| 217 | |
| 218 | while ((entry = readdir(dir)) != NULL) { |
| 219 | if (strcmp(entry->d_name, ".") == 0) |
| 220 | continue; |
| 221 | if (strcmp(entry->d_name, "..") == 0) |
| 222 | continue; |
| 223 | nsid = get_netnsid_from_name(entry->d_name); |
| 224 | |
| 225 | if (nsid >= 0) |
| 226 | netns_map_add(nsid, entry->d_name); |
| 227 | } |
| 228 | closedir(dir); |
| 229 | initialized = 1; |
| 230 | } |
| 231 | |
| 232 | static int netns_get_name(int nsid, char *name) |
| 233 | { |
| 234 | struct dirent *entry; |
| 235 | DIR *dir; |
| 236 | int id; |
| 237 | |
| 238 | dir = opendir(NETNS_RUN_DIR); |
| 239 | if (!dir) |
| 240 | return -ENOENT; |
| 241 | |
| 242 | while ((entry = readdir(dir)) != NULL) { |
| 243 | if (strcmp(entry->d_name, ".") == 0) |
| 244 | continue; |
| 245 | if (strcmp(entry->d_name, "..") == 0) |
| 246 | continue; |
| 247 | id = get_netnsid_from_name(entry->d_name); |
| 248 | |
| 249 | if (nsid == id) { |
| 250 | strcpy(name, entry->d_name); |
| 251 | closedir(dir); |
| 252 | return 0; |
| 253 | } |
| 254 | } |
| 255 | closedir(dir); |
| 256 | return -ENOENT; |
| 257 | } |
| 258 | |
| 259 | int print_nsid(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) |
| 260 | { |
| 261 | struct rtgenmsg *rthdr = NLMSG_DATA(n); |
| 262 | struct rtattr *tb[NETNSA_MAX+1]; |
| 263 | int len = n->nlmsg_len; |
| 264 | FILE *fp = (FILE *)arg; |
| 265 | struct nsid_cache *c; |
| 266 | char name[NAME_MAX]; |
| 267 | int nsid; |
| 268 | |
| 269 | if (n->nlmsg_type != RTM_NEWNSID && n->nlmsg_type != RTM_DELNSID) |
| 270 | return 0; |
| 271 | |
| 272 | len -= NLMSG_SPACE(sizeof(*rthdr)); |
| 273 | if (len < 0) { |
| 274 | fprintf(stderr, "BUG: wrong nlmsg len %d in %s\n", len, |
| 275 | __func__); |
| 276 | return -1; |
| 277 | } |
| 278 | |
| 279 | parse_rtattr(tb, NETNSA_MAX, NETNS_RTA(rthdr), len); |
| 280 | if (tb[NETNSA_NSID] == NULL) { |
| 281 | fprintf(stderr, "BUG: NETNSA_NSID is missing %s\n", __func__); |
| 282 | return -1; |
| 283 | } |
| 284 | |
| 285 | if (n->nlmsg_type == RTM_DELNSID) |
| 286 | fprintf(fp, "Deleted "); |
| 287 | |
| 288 | nsid = rta_getattr_u32(tb[NETNSA_NSID]); |
| 289 | fprintf(fp, "nsid %u ", nsid); |
| 290 | |
| 291 | c = netns_map_get_by_nsid(nsid); |
| 292 | if (c != NULL) { |
| 293 | fprintf(fp, "(iproute2 netns name: %s)", c->name); |
| 294 | netns_map_del(c); |
| 295 | } |
| 296 | |
| 297 | /* During 'ip monitor nsid', no chance to have new nsid in cache. */ |
| 298 | if (c == NULL && n->nlmsg_type == RTM_NEWNSID) |
| 299 | if (netns_get_name(nsid, name) == 0) { |
| 300 | fprintf(fp, "(iproute2 netns name: %s)", name); |
| 301 | netns_map_add(nsid, name); |
| 302 | } |
| 303 | |
| 304 | fprintf(fp, "\n"); |
| 305 | fflush(fp); |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | static int netns_list_id(int argc, char **argv) |
| 310 | { |
| 311 | if (!ipnetns_have_nsid()) { |
| 312 | fprintf(stderr, |
| 313 | "RTM_GETNSID is not supported by the kernel.\n"); |
| 314 | return -ENOTSUP; |
| 315 | } |
| 316 | |
| 317 | if (rtnl_wilddump_request(&rth, AF_UNSPEC, RTM_GETNSID) < 0) { |
| 318 | perror("Cannot send dump request"); |
| 319 | exit(1); |
| 320 | } |
| 321 | if (rtnl_dump_filter(&rth, print_nsid, stdout) < 0) { |
| 322 | fprintf(stderr, "Dump terminated\n"); |
| 323 | exit(1); |
| 324 | } |
| 325 | return 0; |
| 326 | } |
| 327 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 328 | static int netns_list(int argc, char **argv) |
| 329 | { |
| 330 | struct dirent *entry; |
| 331 | DIR *dir; |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 332 | int id; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 333 | |
| 334 | dir = opendir(NETNS_RUN_DIR); |
| 335 | if (!dir) |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 336 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 337 | |
| 338 | while ((entry = readdir(dir)) != NULL) { |
| 339 | if (strcmp(entry->d_name, ".") == 0) |
| 340 | continue; |
| 341 | if (strcmp(entry->d_name, "..") == 0) |
| 342 | continue; |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 343 | printf("%s", entry->d_name); |
Nicolas Dichtel | 4c7d9a5 | 2015-04-13 10:34:26 +0200 | [diff] [blame] | 344 | if (ipnetns_have_nsid()) { |
| 345 | id = get_netnsid_from_name(entry->d_name); |
| 346 | if (id >= 0) |
| 347 | printf(" (id: %d)", id); |
| 348 | } |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 349 | printf("\n"); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 350 | } |
| 351 | closedir(dir); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 352 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 353 | } |
| 354 | |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 355 | 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] | 356 | { |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 357 | fflush(stdout); |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 358 | if (do_fork) { |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 359 | int status; |
| 360 | pid_t pid; |
| 361 | |
| 362 | pid = fork(); |
| 363 | if (pid < 0) { |
| 364 | perror("fork"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 365 | exit(1); |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 366 | } |
| 367 | |
| 368 | if (pid != 0) { |
| 369 | /* Parent */ |
| 370 | if (waitpid(pid, &status, 0) < 0) { |
| 371 | perror("waitpid"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 372 | exit(1); |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 373 | } |
| 374 | |
Nicolas Dichtel | 3c61c01 | 2013-08-29 14:29:07 +0200 | [diff] [blame] | 375 | if (WIFEXITED(status)) { |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 376 | return WEXITSTATUS(status); |
Nicolas Dichtel | 3c61c01 | 2013-08-29 14:29:07 +0200 | [diff] [blame] | 377 | } |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 378 | |
Nicolas Dichtel | 3c61c01 | 2013-08-29 14:29:07 +0200 | [diff] [blame] | 379 | exit(1); |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 380 | } |
| 381 | } |
| 382 | |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 383 | if (execvp(cmd, argv) < 0) |
Kees van Reeuwijk | 14645ec | 2013-02-08 03:32:36 +0000 | [diff] [blame] | 384 | fprintf(stderr, "exec of \"%s\" failed: %s\n", |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 385 | cmd, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 386 | _exit(1); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 387 | } |
| 388 | |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 389 | static int on_netns_exec(char *nsname, void *arg) |
| 390 | { |
| 391 | char **argv = arg; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 392 | |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 393 | cmd_exec(argv[1], argv + 1, true); |
| 394 | return 0; |
| 395 | } |
| 396 | |
| 397 | static int netns_exec(int argc, char **argv) |
| 398 | { |
| 399 | /* Setup the proper environment for apps that are not netns |
| 400 | * aware, and execute a program in that environment. |
| 401 | */ |
| 402 | const char *cmd; |
| 403 | |
| 404 | if (argc < 1 && !do_all) { |
| 405 | fprintf(stderr, "No netns name specified\n"); |
| 406 | return -1; |
| 407 | } |
| 408 | if ((argc < 2 && !do_all) || (argc < 1 && do_all)) { |
| 409 | fprintf(stderr, "No command specified\n"); |
| 410 | return -1; |
| 411 | } |
| 412 | |
| 413 | if (do_all) |
| 414 | return do_each_netns(on_netns_exec, --argv, 1); |
| 415 | |
| 416 | if (netns_switch(argv[0])) |
| 417 | return -1; |
| 418 | |
| 419 | /* ip must return the status of the child, |
| 420 | * but do_cmd() will add a minus to this, |
| 421 | * so let's add another one here to cancel it. |
| 422 | */ |
| 423 | cmd = argv[1]; |
| 424 | return -cmd_exec(cmd, argv + 1, !!batch_mode); |
| 425 | } |
| 426 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 427 | static int is_pid(const char *str) |
| 428 | { |
| 429 | int ch; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 430 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 431 | for (; (ch = *str); str++) { |
| 432 | if (!isdigit(ch)) |
| 433 | return 0; |
| 434 | } |
| 435 | return 1; |
| 436 | } |
| 437 | |
| 438 | static int netns_pids(int argc, char **argv) |
| 439 | { |
| 440 | const char *name; |
Felix Janda | ea34366 | 2015-07-26 21:25:32 +0200 | [diff] [blame] | 441 | char net_path[PATH_MAX]; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 442 | int netns; |
| 443 | struct stat netst; |
| 444 | DIR *dir; |
| 445 | struct dirent *entry; |
| 446 | |
| 447 | if (argc < 1) { |
| 448 | fprintf(stderr, "No netns name specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 449 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 450 | } |
| 451 | if (argc > 1) { |
| 452 | fprintf(stderr, "extra arguments specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 453 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 454 | } |
| 455 | |
| 456 | name = argv[0]; |
| 457 | snprintf(net_path, sizeof(net_path), "%s/%s", NETNS_RUN_DIR, name); |
| 458 | netns = open(net_path, O_RDONLY); |
| 459 | if (netns < 0) { |
| 460 | fprintf(stderr, "Cannot open network namespace: %s\n", |
| 461 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 462 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 463 | } |
| 464 | if (fstat(netns, &netst) < 0) { |
| 465 | fprintf(stderr, "Stat of netns failed: %s\n", |
| 466 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 467 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 468 | } |
| 469 | dir = opendir("/proc/"); |
| 470 | if (!dir) { |
| 471 | fprintf(stderr, "Open of /proc failed: %s\n", |
| 472 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 473 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 474 | } |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 475 | while ((entry = readdir(dir))) { |
Felix Janda | ea34366 | 2015-07-26 21:25:32 +0200 | [diff] [blame] | 476 | char pid_net_path[PATH_MAX]; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 477 | struct stat st; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 478 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 479 | if (!is_pid(entry->d_name)) |
| 480 | continue; |
| 481 | snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%s/ns/net", |
| 482 | entry->d_name); |
| 483 | if (stat(pid_net_path, &st) != 0) |
| 484 | continue; |
| 485 | if ((st.st_dev == netst.st_dev) && |
| 486 | (st.st_ino == netst.st_ino)) { |
| 487 | printf("%s\n", entry->d_name); |
| 488 | } |
| 489 | } |
| 490 | closedir(dir); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 491 | return 0; |
Stephen Hemminger | 0612519 | 2014-02-17 10:55:31 -0800 | [diff] [blame] | 492 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 493 | } |
| 494 | |
| 495 | static int netns_identify(int argc, char **argv) |
| 496 | { |
| 497 | const char *pidstr; |
Felix Janda | ea34366 | 2015-07-26 21:25:32 +0200 | [diff] [blame] | 498 | char net_path[PATH_MAX]; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 499 | int netns; |
| 500 | struct stat netst; |
| 501 | DIR *dir; |
| 502 | struct dirent *entry; |
| 503 | |
| 504 | if (argc < 1) { |
vadimk | 0948adc | 2014-11-07 18:25:30 +0200 | [diff] [blame] | 505 | pidstr = "self"; |
| 506 | } else if (argc > 1) { |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 507 | fprintf(stderr, "extra arguments specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 508 | return -1; |
vadimk | 0948adc | 2014-11-07 18:25:30 +0200 | [diff] [blame] | 509 | } else { |
| 510 | pidstr = argv[0]; |
| 511 | if (!is_pid(pidstr)) { |
| 512 | fprintf(stderr, "Specified string '%s' is not a pid\n", |
| 513 | pidstr); |
| 514 | return -1; |
| 515 | } |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 516 | } |
| 517 | |
| 518 | snprintf(net_path, sizeof(net_path), "/proc/%s/ns/net", pidstr); |
| 519 | netns = open(net_path, O_RDONLY); |
| 520 | if (netns < 0) { |
| 521 | fprintf(stderr, "Cannot open network namespace: %s\n", |
| 522 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 523 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 524 | } |
| 525 | if (fstat(netns, &netst) < 0) { |
| 526 | fprintf(stderr, "Stat of netns failed: %s\n", |
| 527 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 528 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 529 | } |
| 530 | dir = opendir(NETNS_RUN_DIR); |
| 531 | if (!dir) { |
| 532 | /* Succeed treat a missing directory as an empty directory */ |
| 533 | if (errno == ENOENT) |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 534 | return 0; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 535 | |
| 536 | fprintf(stderr, "Failed to open directory %s:%s\n", |
| 537 | NETNS_RUN_DIR, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 538 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 539 | } |
| 540 | |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 541 | while ((entry = readdir(dir))) { |
Felix Janda | ea34366 | 2015-07-26 21:25:32 +0200 | [diff] [blame] | 542 | char name_path[PATH_MAX]; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 543 | struct stat st; |
| 544 | |
| 545 | if (strcmp(entry->d_name, ".") == 0) |
| 546 | continue; |
| 547 | if (strcmp(entry->d_name, "..") == 0) |
| 548 | continue; |
| 549 | |
| 550 | snprintf(name_path, sizeof(name_path), "%s/%s", NETNS_RUN_DIR, |
| 551 | entry->d_name); |
| 552 | |
| 553 | if (stat(name_path, &st) != 0) |
| 554 | continue; |
| 555 | |
| 556 | if ((st.st_dev == netst.st_dev) && |
| 557 | (st.st_ino == netst.st_ino)) { |
| 558 | printf("%s\n", entry->d_name); |
| 559 | } |
| 560 | } |
| 561 | closedir(dir); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 562 | return 0; |
Stephen Hemminger | 0612519 | 2014-02-17 10:55:31 -0800 | [diff] [blame] | 563 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 564 | } |
| 565 | |
Vadim Kochan | 3372493 | 2015-01-18 16:10:19 +0200 | [diff] [blame] | 566 | static int on_netns_del(char *nsname, void *arg) |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 567 | { |
Felix Janda | ea34366 | 2015-07-26 21:25:32 +0200 | [diff] [blame] | 568 | char netns_path[PATH_MAX]; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 569 | |
Vadim Kochan | 3372493 | 2015-01-18 16:10:19 +0200 | [diff] [blame] | 570 | 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] | 571 | umount2(netns_path, MNT_DETACH); |
| 572 | if (unlink(netns_path) < 0) { |
Kees van Reeuwijk | 14645ec | 2013-02-08 03:32:36 +0000 | [diff] [blame] | 573 | fprintf(stderr, "Cannot remove namespace file \"%s\": %s\n", |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 574 | netns_path, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 575 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 576 | } |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 577 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 578 | } |
| 579 | |
Vadim Kochan | 3372493 | 2015-01-18 16:10:19 +0200 | [diff] [blame] | 580 | static int netns_delete(int argc, char **argv) |
| 581 | { |
| 582 | if (argc < 1 && !do_all) { |
| 583 | fprintf(stderr, "No netns name specified\n"); |
| 584 | return -1; |
| 585 | } |
| 586 | |
| 587 | if (do_all) |
| 588 | return netns_foreach(on_netns_del, NULL); |
| 589 | |
| 590 | return on_netns_del(argv[0], NULL); |
| 591 | } |
| 592 | |
vadimk | c1cbb18 | 2014-08-31 22:45:29 +0300 | [diff] [blame] | 593 | static int create_netns_dir(void) |
| 594 | { |
| 595 | /* Create the base netns directory if it doesn't exist */ |
| 596 | if (mkdir(NETNS_RUN_DIR, S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)) { |
| 597 | if (errno != EEXIST) { |
| 598 | fprintf(stderr, "mkdir %s failed: %s\n", |
| 599 | NETNS_RUN_DIR, strerror(errno)); |
| 600 | return -1; |
| 601 | } |
| 602 | } |
| 603 | |
| 604 | return 0; |
| 605 | } |
| 606 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 607 | static int netns_add(int argc, char **argv) |
| 608 | { |
| 609 | /* This function creates a new network namespace and |
| 610 | * a new mount namespace and bind them into a well known |
| 611 | * location in the filesystem based on the name provided. |
| 612 | * |
| 613 | * The mount namespace is created so that any necessary |
| 614 | * userspace tweaks like remounting /sys, or bind mounting |
| 615 | * a new /etc/resolv.conf can be shared between uers. |
| 616 | */ |
Felix Janda | ea34366 | 2015-07-26 21:25:32 +0200 | [diff] [blame] | 617 | char netns_path[PATH_MAX]; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 618 | const char *name; |
Eric W. Biederman | 223f4d8 | 2011-07-15 14:29:41 +0000 | [diff] [blame] | 619 | int fd; |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 620 | int made_netns_run_dir_mount = 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 621 | |
| 622 | if (argc < 1) { |
| 623 | fprintf(stderr, "No netns name specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 624 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 625 | } |
| 626 | name = argv[0]; |
| 627 | |
| 628 | snprintf(netns_path, sizeof(netns_path), "%s/%s", NETNS_RUN_DIR, name); |
| 629 | |
vadimk | c1cbb18 | 2014-08-31 22:45:29 +0300 | [diff] [blame] | 630 | if (create_netns_dir()) |
| 631 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 632 | |
Stephen Hemminger | d259f03 | 2013-08-04 15:00:56 -0700 | [diff] [blame] | 633 | /* Make it possible for network namespace mounts to propagate between |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 634 | * mount namespaces. This makes it likely that a unmounting a network |
| 635 | * namespace file in one namespace will unmount the network namespace |
| 636 | * file in all namespaces allowing the network namespace to be freed |
| 637 | * sooner. |
| 638 | */ |
| 639 | while (mount("", NETNS_RUN_DIR, "none", MS_SHARED | MS_REC, NULL)) { |
| 640 | /* Fail unless we need to make the mount point */ |
| 641 | if (errno != EINVAL || made_netns_run_dir_mount) { |
| 642 | fprintf(stderr, "mount --make-shared %s failed: %s\n", |
| 643 | NETNS_RUN_DIR, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 644 | return -1; |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 645 | } |
| 646 | |
| 647 | /* Upgrade NETNS_RUN_DIR to a mount point */ |
| 648 | if (mount(NETNS_RUN_DIR, NETNS_RUN_DIR, "none", MS_BIND, NULL)) { |
| 649 | fprintf(stderr, "mount --bind %s %s failed: %s\n", |
| 650 | NETNS_RUN_DIR, NETNS_RUN_DIR, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 651 | return -1; |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 652 | } |
| 653 | made_netns_run_dir_mount = 1; |
| 654 | } |
| 655 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 656 | /* Create the filesystem state */ |
Eric W. Biederman | 223f4d8 | 2011-07-15 14:29:41 +0000 | [diff] [blame] | 657 | fd = open(netns_path, O_RDONLY|O_CREAT|O_EXCL, 0); |
| 658 | if (fd < 0) { |
Mike Rapoport | 55713c8 | 2014-05-11 12:21:26 +0300 | [diff] [blame] | 659 | fprintf(stderr, "Cannot create namespace file \"%s\": %s\n", |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 660 | netns_path, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 661 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 662 | } |
Eric W. Biederman | 223f4d8 | 2011-07-15 14:29:41 +0000 | [diff] [blame] | 663 | close(fd); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 664 | if (unshare(CLONE_NEWNET) < 0) { |
Kees van Reeuwijk | 14645ec | 2013-02-08 03:32:36 +0000 | [diff] [blame] | 665 | fprintf(stderr, "Failed to create a new network namespace \"%s\": %s\n", |
| 666 | name, strerror(errno)); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 667 | goto out_delete; |
| 668 | } |
| 669 | |
| 670 | /* Bind the netns last so I can watch for it */ |
| 671 | if (mount("/proc/self/ns/net", netns_path, "none", MS_BIND, NULL) < 0) { |
| 672 | fprintf(stderr, "Bind /proc/self/ns/net -> %s failed: %s\n", |
| 673 | netns_path, strerror(errno)); |
| 674 | goto out_delete; |
| 675 | } |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 676 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 677 | out_delete: |
| 678 | netns_delete(argc, argv); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 679 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 680 | } |
| 681 | |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 682 | static int set_netnsid_from_name(const char *name, int nsid) |
| 683 | { |
| 684 | struct { |
| 685 | struct nlmsghdr n; |
| 686 | struct rtgenmsg g; |
| 687 | char buf[1024]; |
| 688 | } req; |
| 689 | int fd, err = 0; |
| 690 | |
| 691 | memset(&req, 0, sizeof(req)); |
| 692 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)); |
| 693 | req.n.nlmsg_flags = NLM_F_REQUEST; |
| 694 | req.n.nlmsg_type = RTM_NEWNSID; |
| 695 | req.g.rtgen_family = AF_UNSPEC; |
| 696 | |
| 697 | fd = netns_get_fd(name); |
| 698 | if (fd < 0) |
| 699 | return fd; |
| 700 | |
| 701 | addattr32(&req.n, 1024, NETNSA_FD, fd); |
| 702 | addattr32(&req.n, 1024, NETNSA_NSID, nsid); |
Stephen Hemminger | c079e12 | 2015-05-27 12:26:14 -0700 | [diff] [blame] | 703 | if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 704 | err = -2; |
| 705 | |
| 706 | close(fd); |
| 707 | return err; |
| 708 | } |
| 709 | |
| 710 | static int netns_set(int argc, char **argv) |
| 711 | { |
Felix Janda | ea34366 | 2015-07-26 21:25:32 +0200 | [diff] [blame] | 712 | char netns_path[PATH_MAX]; |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 713 | const char *name; |
| 714 | int netns, nsid; |
| 715 | |
| 716 | if (argc < 1) { |
| 717 | fprintf(stderr, "No netns name specified\n"); |
| 718 | return -1; |
| 719 | } |
| 720 | if (argc < 2) { |
| 721 | fprintf(stderr, "No nsid specified\n"); |
| 722 | return -1; |
| 723 | } |
| 724 | name = argv[0]; |
| 725 | nsid = atoi(argv[1]); |
| 726 | |
| 727 | snprintf(netns_path, sizeof(netns_path), "%s/%s", NETNS_RUN_DIR, name); |
| 728 | netns = open(netns_path, O_RDONLY | O_CLOEXEC); |
| 729 | if (netns < 0) { |
| 730 | fprintf(stderr, "Cannot open network namespace \"%s\": %s\n", |
| 731 | name, strerror(errno)); |
| 732 | return -1; |
| 733 | } |
| 734 | |
| 735 | return set_netnsid_from_name(name, nsid); |
| 736 | } |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 737 | |
| 738 | static int netns_monitor(int argc, char **argv) |
| 739 | { |
| 740 | char buf[4096]; |
| 741 | struct inotify_event *event; |
| 742 | int fd; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 743 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 744 | fd = inotify_init(); |
| 745 | if (fd < 0) { |
| 746 | fprintf(stderr, "inotify_init failed: %s\n", |
| 747 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 748 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 749 | } |
vadimk | c1cbb18 | 2014-08-31 22:45:29 +0300 | [diff] [blame] | 750 | |
| 751 | if (create_netns_dir()) |
| 752 | return -1; |
| 753 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 754 | if (inotify_add_watch(fd, NETNS_RUN_DIR, IN_CREATE | IN_DELETE) < 0) { |
| 755 | fprintf(stderr, "inotify_add_watch failed: %s\n", |
| 756 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 757 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 758 | } |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 759 | for (;;) { |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 760 | ssize_t len = read(fd, buf, sizeof(buf)); |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 761 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 762 | if (len < 0) { |
| 763 | fprintf(stderr, "read failed: %s\n", |
| 764 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 765 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 766 | } |
| 767 | for (event = (struct inotify_event *)buf; |
| 768 | (char *)event < &buf[len]; |
| 769 | event = (struct inotify_event *)((char *)event + sizeof(*event) + event->len)) { |
| 770 | if (event->mask & IN_CREATE) |
| 771 | printf("add %s\n", event->name); |
| 772 | if (event->mask & IN_DELETE) |
| 773 | printf("delete %s\n", event->name); |
| 774 | } |
| 775 | } |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 776 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 777 | } |
| 778 | |
| 779 | int do_netns(int argc, char **argv) |
| 780 | { |
Nicolas Dichtel | d652ccb | 2015-04-15 14:23:22 +0200 | [diff] [blame] | 781 | netns_map_init(); |
| 782 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 783 | if (argc < 1) |
| 784 | return netns_list(0, NULL); |
| 785 | |
| 786 | if ((matches(*argv, "list") == 0) || (matches(*argv, "show") == 0) || |
| 787 | (matches(*argv, "lst") == 0)) |
| 788 | return netns_list(argc-1, argv+1); |
| 789 | |
Nicolas Dichtel | d652ccb | 2015-04-15 14:23:22 +0200 | [diff] [blame] | 790 | if ((matches(*argv, "list-id") == 0)) |
| 791 | return netns_list_id(argc-1, argv+1); |
| 792 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 793 | if (matches(*argv, "help") == 0) |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 794 | return usage(); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 795 | |
| 796 | if (matches(*argv, "add") == 0) |
| 797 | return netns_add(argc-1, argv+1); |
| 798 | |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 799 | if (matches(*argv, "set") == 0) |
| 800 | return netns_set(argc-1, argv+1); |
| 801 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 802 | if (matches(*argv, "delete") == 0) |
| 803 | return netns_delete(argc-1, argv+1); |
| 804 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 805 | if (matches(*argv, "identify") == 0) |
| 806 | return netns_identify(argc-1, argv+1); |
| 807 | |
| 808 | if (matches(*argv, "pids") == 0) |
| 809 | return netns_pids(argc-1, argv+1); |
| 810 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 811 | if (matches(*argv, "exec") == 0) |
| 812 | return netns_exec(argc-1, argv+1); |
| 813 | |
| 814 | if (matches(*argv, "monitor") == 0) |
| 815 | return netns_monitor(argc-1, argv+1); |
| 816 | |
| 817 | fprintf(stderr, "Command \"%s\" is unknown, try \"ip netns help\".\n", *argv); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 818 | exit(-1); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 819 | } |