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]; |
Phil Sutter | d17b136 | 2016-07-18 16:48:42 +0200 | [diff] [blame^] | 64 | } req = { |
| 65 | .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)), |
| 66 | .n.nlmsg_flags = NLM_F_REQUEST, |
| 67 | .n.nlmsg_type = RTM_GETNSID, |
| 68 | .g.rtgen_family = AF_UNSPEC, |
| 69 | }; |
Nicolas Dichtel | 4c7d9a5 | 2015-04-13 10:34:26 +0200 | [diff] [blame] | 70 | int fd; |
| 71 | |
| 72 | if (have_rtnl_getnsid < 0) { |
Nicolas Dichtel | 4c7d9a5 | 2015-04-13 10:34:26 +0200 | [diff] [blame] | 73 | fd = open("/proc/self/ns/net", O_RDONLY); |
| 74 | if (fd < 0) { |
| 75 | perror("open(\"/proc/self/ns/net\")"); |
| 76 | exit(1); |
| 77 | } |
| 78 | |
| 79 | addattr32(&req.n, 1024, NETNSA_FD, fd); |
| 80 | |
| 81 | if (rtnl_send(&rth, &req.n, req.n.nlmsg_len) < 0) { |
| 82 | perror("request send failed"); |
| 83 | exit(1); |
| 84 | } |
| 85 | rtnl_listen(&rth, ipnetns_accept_msg, NULL); |
| 86 | close(fd); |
| 87 | } |
| 88 | |
| 89 | return have_rtnl_getnsid; |
| 90 | } |
| 91 | |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 92 | static int get_netnsid_from_name(const char *name) |
| 93 | { |
| 94 | struct { |
| 95 | struct nlmsghdr n; |
| 96 | struct rtgenmsg g; |
| 97 | char buf[1024]; |
Phil Sutter | d17b136 | 2016-07-18 16:48:42 +0200 | [diff] [blame^] | 98 | } answer, req = { |
| 99 | .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)), |
| 100 | .n.nlmsg_flags = NLM_F_REQUEST, |
| 101 | .n.nlmsg_type = RTM_GETNSID, |
| 102 | .g.rtgen_family = AF_UNSPEC, |
| 103 | }; |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 104 | struct rtattr *tb[NETNSA_MAX + 1]; |
| 105 | struct rtgenmsg *rthdr; |
| 106 | int len, fd; |
| 107 | |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 108 | fd = netns_get_fd(name); |
| 109 | if (fd < 0) |
| 110 | return fd; |
| 111 | |
| 112 | addattr32(&req.n, 1024, NETNSA_FD, fd); |
Stephen Hemminger | c079e12 | 2015-05-27 12:26:14 -0700 | [diff] [blame] | 113 | if (rtnl_talk(&rtnsh, &req.n, &answer.n, sizeof(answer)) < 0) { |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 114 | close(fd); |
| 115 | return -2; |
| 116 | } |
| 117 | close(fd); |
| 118 | |
| 119 | /* Validate message and parse attributes */ |
| 120 | if (answer.n.nlmsg_type == NLMSG_ERROR) |
| 121 | return -1; |
| 122 | |
| 123 | rthdr = NLMSG_DATA(&answer.n); |
| 124 | len = answer.n.nlmsg_len - NLMSG_SPACE(sizeof(*rthdr)); |
| 125 | if (len < 0) |
| 126 | return -1; |
| 127 | |
| 128 | parse_rtattr(tb, NETNSA_MAX, NETNS_RTA(rthdr), len); |
| 129 | |
| 130 | if (tb[NETNSA_NSID]) |
| 131 | return rta_getattr_u32(tb[NETNSA_NSID]); |
| 132 | |
| 133 | return -1; |
| 134 | } |
| 135 | |
Nicolas Dichtel | d652ccb | 2015-04-15 14:23:22 +0200 | [diff] [blame] | 136 | struct nsid_cache { |
| 137 | struct hlist_node nsid_hash; |
| 138 | struct hlist_node name_hash; |
| 139 | int nsid; |
Stephen Hemminger | 2f29d6b | 2015-08-12 08:35:54 -0700 | [diff] [blame] | 140 | char name[0]; |
Nicolas Dichtel | d652ccb | 2015-04-15 14:23:22 +0200 | [diff] [blame] | 141 | }; |
| 142 | |
| 143 | #define NSIDMAP_SIZE 128 |
| 144 | #define NSID_HASH_NSID(nsid) (nsid & (NSIDMAP_SIZE - 1)) |
| 145 | #define NSID_HASH_NAME(name) (namehash(name) & (NSIDMAP_SIZE - 1)) |
| 146 | |
| 147 | static struct hlist_head nsid_head[NSIDMAP_SIZE]; |
| 148 | static struct hlist_head name_head[NSIDMAP_SIZE]; |
| 149 | |
| 150 | static struct nsid_cache *netns_map_get_by_nsid(int nsid) |
| 151 | { |
| 152 | uint32_t h = NSID_HASH_NSID(nsid); |
| 153 | struct hlist_node *n; |
| 154 | |
| 155 | hlist_for_each(n, &nsid_head[h]) { |
| 156 | struct nsid_cache *c = container_of(n, struct nsid_cache, |
| 157 | nsid_hash); |
| 158 | if (c->nsid == nsid) |
| 159 | return c; |
| 160 | } |
| 161 | |
| 162 | return NULL; |
| 163 | } |
| 164 | |
Stephen Hemminger | 2f29d6b | 2015-08-12 08:35:54 -0700 | [diff] [blame] | 165 | static int netns_map_add(int nsid, const char *name) |
Nicolas Dichtel | d652ccb | 2015-04-15 14:23:22 +0200 | [diff] [blame] | 166 | { |
| 167 | struct nsid_cache *c; |
| 168 | uint32_t h; |
| 169 | |
| 170 | if (netns_map_get_by_nsid(nsid) != NULL) |
| 171 | return -EEXIST; |
| 172 | |
Nicolas Cavallari | a1b4a27 | 2016-02-12 14:47:39 +0100 | [diff] [blame] | 173 | c = malloc(sizeof(*c) + strlen(name) + 1); |
Nicolas Dichtel | d652ccb | 2015-04-15 14:23:22 +0200 | [diff] [blame] | 174 | if (c == NULL) { |
| 175 | perror("malloc"); |
| 176 | return -ENOMEM; |
| 177 | } |
| 178 | c->nsid = nsid; |
| 179 | strcpy(c->name, name); |
| 180 | |
| 181 | h = NSID_HASH_NSID(nsid); |
| 182 | hlist_add_head(&c->nsid_hash, &nsid_head[h]); |
| 183 | |
| 184 | h = NSID_HASH_NAME(name); |
| 185 | hlist_add_head(&c->name_hash, &name_head[h]); |
| 186 | |
| 187 | return 0; |
| 188 | } |
| 189 | |
| 190 | static void netns_map_del(struct nsid_cache *c) |
| 191 | { |
| 192 | hlist_del(&c->name_hash); |
| 193 | hlist_del(&c->nsid_hash); |
| 194 | free(c); |
| 195 | } |
| 196 | |
| 197 | void netns_map_init(void) |
| 198 | { |
| 199 | static int initialized; |
| 200 | struct dirent *entry; |
| 201 | DIR *dir; |
| 202 | int nsid; |
| 203 | |
| 204 | if (initialized || !ipnetns_have_nsid()) |
| 205 | return; |
| 206 | |
| 207 | if (rtnl_open(&rtnsh, 0) < 0) { |
| 208 | fprintf(stderr, "Cannot open rtnetlink\n"); |
| 209 | exit(1); |
| 210 | } |
| 211 | |
| 212 | dir = opendir(NETNS_RUN_DIR); |
| 213 | if (!dir) |
| 214 | return; |
| 215 | |
| 216 | while ((entry = readdir(dir)) != NULL) { |
| 217 | if (strcmp(entry->d_name, ".") == 0) |
| 218 | continue; |
| 219 | if (strcmp(entry->d_name, "..") == 0) |
| 220 | continue; |
| 221 | nsid = get_netnsid_from_name(entry->d_name); |
| 222 | |
| 223 | if (nsid >= 0) |
| 224 | netns_map_add(nsid, entry->d_name); |
| 225 | } |
| 226 | closedir(dir); |
| 227 | initialized = 1; |
| 228 | } |
| 229 | |
| 230 | static int netns_get_name(int nsid, char *name) |
| 231 | { |
| 232 | struct dirent *entry; |
| 233 | DIR *dir; |
| 234 | int id; |
| 235 | |
| 236 | dir = opendir(NETNS_RUN_DIR); |
| 237 | if (!dir) |
| 238 | return -ENOENT; |
| 239 | |
| 240 | while ((entry = readdir(dir)) != NULL) { |
| 241 | if (strcmp(entry->d_name, ".") == 0) |
| 242 | continue; |
| 243 | if (strcmp(entry->d_name, "..") == 0) |
| 244 | continue; |
| 245 | id = get_netnsid_from_name(entry->d_name); |
| 246 | |
| 247 | if (nsid == id) { |
| 248 | strcpy(name, entry->d_name); |
| 249 | closedir(dir); |
| 250 | return 0; |
| 251 | } |
| 252 | } |
| 253 | closedir(dir); |
| 254 | return -ENOENT; |
| 255 | } |
| 256 | |
| 257 | int print_nsid(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) |
| 258 | { |
| 259 | struct rtgenmsg *rthdr = NLMSG_DATA(n); |
| 260 | struct rtattr *tb[NETNSA_MAX+1]; |
| 261 | int len = n->nlmsg_len; |
| 262 | FILE *fp = (FILE *)arg; |
| 263 | struct nsid_cache *c; |
| 264 | char name[NAME_MAX]; |
| 265 | int nsid; |
| 266 | |
| 267 | if (n->nlmsg_type != RTM_NEWNSID && n->nlmsg_type != RTM_DELNSID) |
| 268 | return 0; |
| 269 | |
| 270 | len -= NLMSG_SPACE(sizeof(*rthdr)); |
| 271 | if (len < 0) { |
| 272 | fprintf(stderr, "BUG: wrong nlmsg len %d in %s\n", len, |
| 273 | __func__); |
| 274 | return -1; |
| 275 | } |
| 276 | |
| 277 | parse_rtattr(tb, NETNSA_MAX, NETNS_RTA(rthdr), len); |
| 278 | if (tb[NETNSA_NSID] == NULL) { |
| 279 | fprintf(stderr, "BUG: NETNSA_NSID is missing %s\n", __func__); |
| 280 | return -1; |
| 281 | } |
| 282 | |
| 283 | if (n->nlmsg_type == RTM_DELNSID) |
| 284 | fprintf(fp, "Deleted "); |
| 285 | |
| 286 | nsid = rta_getattr_u32(tb[NETNSA_NSID]); |
| 287 | fprintf(fp, "nsid %u ", nsid); |
| 288 | |
| 289 | c = netns_map_get_by_nsid(nsid); |
| 290 | if (c != NULL) { |
| 291 | fprintf(fp, "(iproute2 netns name: %s)", c->name); |
| 292 | netns_map_del(c); |
| 293 | } |
| 294 | |
| 295 | /* During 'ip monitor nsid', no chance to have new nsid in cache. */ |
| 296 | if (c == NULL && n->nlmsg_type == RTM_NEWNSID) |
| 297 | if (netns_get_name(nsid, name) == 0) { |
| 298 | fprintf(fp, "(iproute2 netns name: %s)", name); |
| 299 | netns_map_add(nsid, name); |
| 300 | } |
| 301 | |
| 302 | fprintf(fp, "\n"); |
| 303 | fflush(fp); |
| 304 | return 0; |
| 305 | } |
| 306 | |
| 307 | static int netns_list_id(int argc, char **argv) |
| 308 | { |
| 309 | if (!ipnetns_have_nsid()) { |
| 310 | fprintf(stderr, |
| 311 | "RTM_GETNSID is not supported by the kernel.\n"); |
| 312 | return -ENOTSUP; |
| 313 | } |
| 314 | |
| 315 | if (rtnl_wilddump_request(&rth, AF_UNSPEC, RTM_GETNSID) < 0) { |
| 316 | perror("Cannot send dump request"); |
| 317 | exit(1); |
| 318 | } |
| 319 | if (rtnl_dump_filter(&rth, print_nsid, stdout) < 0) { |
| 320 | fprintf(stderr, "Dump terminated\n"); |
| 321 | exit(1); |
| 322 | } |
| 323 | return 0; |
| 324 | } |
| 325 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 326 | static int netns_list(int argc, char **argv) |
| 327 | { |
| 328 | struct dirent *entry; |
| 329 | DIR *dir; |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 330 | int id; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 331 | |
| 332 | dir = opendir(NETNS_RUN_DIR); |
| 333 | if (!dir) |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 334 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 335 | |
| 336 | while ((entry = readdir(dir)) != NULL) { |
| 337 | if (strcmp(entry->d_name, ".") == 0) |
| 338 | continue; |
| 339 | if (strcmp(entry->d_name, "..") == 0) |
| 340 | continue; |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 341 | printf("%s", entry->d_name); |
Nicolas Dichtel | 4c7d9a5 | 2015-04-13 10:34:26 +0200 | [diff] [blame] | 342 | if (ipnetns_have_nsid()) { |
| 343 | id = get_netnsid_from_name(entry->d_name); |
| 344 | if (id >= 0) |
| 345 | printf(" (id: %d)", id); |
| 346 | } |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 347 | printf("\n"); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 348 | } |
| 349 | closedir(dir); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 350 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 351 | } |
| 352 | |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 353 | 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] | 354 | { |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 355 | fflush(stdout); |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 356 | if (do_fork) { |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 357 | int status; |
| 358 | pid_t pid; |
| 359 | |
| 360 | pid = fork(); |
| 361 | if (pid < 0) { |
| 362 | perror("fork"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 363 | exit(1); |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | if (pid != 0) { |
| 367 | /* Parent */ |
| 368 | if (waitpid(pid, &status, 0) < 0) { |
| 369 | perror("waitpid"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 370 | exit(1); |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 371 | } |
| 372 | |
Nicolas Dichtel | 3c61c01 | 2013-08-29 14:29:07 +0200 | [diff] [blame] | 373 | if (WIFEXITED(status)) { |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 374 | return WEXITSTATUS(status); |
Nicolas Dichtel | 3c61c01 | 2013-08-29 14:29:07 +0200 | [diff] [blame] | 375 | } |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 376 | |
Nicolas Dichtel | 3c61c01 | 2013-08-29 14:29:07 +0200 | [diff] [blame] | 377 | exit(1); |
JunweiZhang | 95592b4 | 2013-07-09 08:55:20 -0700 | [diff] [blame] | 378 | } |
| 379 | } |
| 380 | |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 381 | if (execvp(cmd, argv) < 0) |
Kees van Reeuwijk | 14645ec | 2013-02-08 03:32:36 +0000 | [diff] [blame] | 382 | fprintf(stderr, "exec of \"%s\" failed: %s\n", |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 383 | cmd, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 384 | _exit(1); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 385 | } |
| 386 | |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 387 | static int on_netns_exec(char *nsname, void *arg) |
| 388 | { |
| 389 | char **argv = arg; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 390 | |
Vadim Kochan | b13ba03 | 2015-01-18 16:10:18 +0200 | [diff] [blame] | 391 | cmd_exec(argv[1], argv + 1, true); |
| 392 | return 0; |
| 393 | } |
| 394 | |
| 395 | static int netns_exec(int argc, char **argv) |
| 396 | { |
| 397 | /* Setup the proper environment for apps that are not netns |
| 398 | * aware, and execute a program in that environment. |
| 399 | */ |
| 400 | const char *cmd; |
| 401 | |
| 402 | if (argc < 1 && !do_all) { |
| 403 | fprintf(stderr, "No netns name specified\n"); |
| 404 | return -1; |
| 405 | } |
| 406 | if ((argc < 2 && !do_all) || (argc < 1 && do_all)) { |
| 407 | fprintf(stderr, "No command specified\n"); |
| 408 | return -1; |
| 409 | } |
| 410 | |
| 411 | if (do_all) |
| 412 | return do_each_netns(on_netns_exec, --argv, 1); |
| 413 | |
| 414 | if (netns_switch(argv[0])) |
| 415 | return -1; |
| 416 | |
| 417 | /* ip must return the status of the child, |
| 418 | * but do_cmd() will add a minus to this, |
| 419 | * so let's add another one here to cancel it. |
| 420 | */ |
| 421 | cmd = argv[1]; |
| 422 | return -cmd_exec(cmd, argv + 1, !!batch_mode); |
| 423 | } |
| 424 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 425 | static int is_pid(const char *str) |
| 426 | { |
| 427 | int ch; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 428 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 429 | for (; (ch = *str); str++) { |
| 430 | if (!isdigit(ch)) |
| 431 | return 0; |
| 432 | } |
| 433 | return 1; |
| 434 | } |
| 435 | |
| 436 | static int netns_pids(int argc, char **argv) |
| 437 | { |
| 438 | const char *name; |
Felix Janda | ea34366 | 2015-07-26 21:25:32 +0200 | [diff] [blame] | 439 | char net_path[PATH_MAX]; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 440 | int netns; |
| 441 | struct stat netst; |
| 442 | DIR *dir; |
| 443 | struct dirent *entry; |
| 444 | |
| 445 | if (argc < 1) { |
| 446 | fprintf(stderr, "No netns name specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 447 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 448 | } |
| 449 | if (argc > 1) { |
| 450 | fprintf(stderr, "extra arguments specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 451 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 452 | } |
| 453 | |
| 454 | name = argv[0]; |
| 455 | snprintf(net_path, sizeof(net_path), "%s/%s", NETNS_RUN_DIR, name); |
| 456 | netns = open(net_path, O_RDONLY); |
| 457 | if (netns < 0) { |
| 458 | fprintf(stderr, "Cannot open network namespace: %s\n", |
| 459 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 460 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 461 | } |
| 462 | if (fstat(netns, &netst) < 0) { |
| 463 | fprintf(stderr, "Stat of netns failed: %s\n", |
| 464 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 465 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 466 | } |
| 467 | dir = opendir("/proc/"); |
| 468 | if (!dir) { |
| 469 | fprintf(stderr, "Open of /proc failed: %s\n", |
| 470 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 471 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 472 | } |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 473 | while ((entry = readdir(dir))) { |
Felix Janda | ea34366 | 2015-07-26 21:25:32 +0200 | [diff] [blame] | 474 | char pid_net_path[PATH_MAX]; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 475 | struct stat st; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 476 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 477 | if (!is_pid(entry->d_name)) |
| 478 | continue; |
| 479 | snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%s/ns/net", |
| 480 | entry->d_name); |
| 481 | if (stat(pid_net_path, &st) != 0) |
| 482 | continue; |
| 483 | if ((st.st_dev == netst.st_dev) && |
| 484 | (st.st_ino == netst.st_ino)) { |
| 485 | printf("%s\n", entry->d_name); |
| 486 | } |
| 487 | } |
| 488 | closedir(dir); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 489 | return 0; |
Stephen Hemminger | 0612519 | 2014-02-17 10:55:31 -0800 | [diff] [blame] | 490 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 491 | } |
| 492 | |
| 493 | static int netns_identify(int argc, char **argv) |
| 494 | { |
| 495 | const char *pidstr; |
Felix Janda | ea34366 | 2015-07-26 21:25:32 +0200 | [diff] [blame] | 496 | char net_path[PATH_MAX]; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 497 | int netns; |
| 498 | struct stat netst; |
| 499 | DIR *dir; |
| 500 | struct dirent *entry; |
| 501 | |
| 502 | if (argc < 1) { |
vadimk | 0948adc | 2014-11-07 18:25:30 +0200 | [diff] [blame] | 503 | pidstr = "self"; |
| 504 | } else if (argc > 1) { |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 505 | fprintf(stderr, "extra arguments specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 506 | return -1; |
vadimk | 0948adc | 2014-11-07 18:25:30 +0200 | [diff] [blame] | 507 | } else { |
| 508 | pidstr = argv[0]; |
| 509 | if (!is_pid(pidstr)) { |
| 510 | fprintf(stderr, "Specified string '%s' is not a pid\n", |
| 511 | pidstr); |
| 512 | return -1; |
| 513 | } |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 514 | } |
| 515 | |
| 516 | snprintf(net_path, sizeof(net_path), "/proc/%s/ns/net", pidstr); |
| 517 | netns = open(net_path, O_RDONLY); |
| 518 | if (netns < 0) { |
| 519 | fprintf(stderr, "Cannot open network namespace: %s\n", |
| 520 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 521 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 522 | } |
| 523 | if (fstat(netns, &netst) < 0) { |
| 524 | fprintf(stderr, "Stat of netns failed: %s\n", |
| 525 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 526 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 527 | } |
| 528 | dir = opendir(NETNS_RUN_DIR); |
| 529 | if (!dir) { |
| 530 | /* Succeed treat a missing directory as an empty directory */ |
| 531 | if (errno == ENOENT) |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 532 | return 0; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 533 | |
| 534 | fprintf(stderr, "Failed to open directory %s:%s\n", |
| 535 | NETNS_RUN_DIR, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 536 | return -1; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 537 | } |
| 538 | |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 539 | while ((entry = readdir(dir))) { |
Felix Janda | ea34366 | 2015-07-26 21:25:32 +0200 | [diff] [blame] | 540 | char name_path[PATH_MAX]; |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 541 | struct stat st; |
| 542 | |
| 543 | if (strcmp(entry->d_name, ".") == 0) |
| 544 | continue; |
| 545 | if (strcmp(entry->d_name, "..") == 0) |
| 546 | continue; |
| 547 | |
| 548 | snprintf(name_path, sizeof(name_path), "%s/%s", NETNS_RUN_DIR, |
| 549 | entry->d_name); |
| 550 | |
| 551 | if (stat(name_path, &st) != 0) |
| 552 | continue; |
| 553 | |
| 554 | if ((st.st_dev == netst.st_dev) && |
| 555 | (st.st_ino == netst.st_ino)) { |
| 556 | printf("%s\n", entry->d_name); |
| 557 | } |
| 558 | } |
| 559 | closedir(dir); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 560 | return 0; |
Stephen Hemminger | 0612519 | 2014-02-17 10:55:31 -0800 | [diff] [blame] | 561 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 562 | } |
| 563 | |
Vadim Kochan | 3372493 | 2015-01-18 16:10:19 +0200 | [diff] [blame] | 564 | static int on_netns_del(char *nsname, void *arg) |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 565 | { |
Felix Janda | ea34366 | 2015-07-26 21:25:32 +0200 | [diff] [blame] | 566 | char netns_path[PATH_MAX]; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 567 | |
Vadim Kochan | 3372493 | 2015-01-18 16:10:19 +0200 | [diff] [blame] | 568 | 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] | 569 | umount2(netns_path, MNT_DETACH); |
| 570 | if (unlink(netns_path) < 0) { |
Kees van Reeuwijk | 14645ec | 2013-02-08 03:32:36 +0000 | [diff] [blame] | 571 | fprintf(stderr, "Cannot remove namespace file \"%s\": %s\n", |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 572 | netns_path, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 573 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 574 | } |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 575 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 576 | } |
| 577 | |
Vadim Kochan | 3372493 | 2015-01-18 16:10:19 +0200 | [diff] [blame] | 578 | static int netns_delete(int argc, char **argv) |
| 579 | { |
| 580 | if (argc < 1 && !do_all) { |
| 581 | fprintf(stderr, "No netns name specified\n"); |
| 582 | return -1; |
| 583 | } |
| 584 | |
| 585 | if (do_all) |
| 586 | return netns_foreach(on_netns_del, NULL); |
| 587 | |
| 588 | return on_netns_del(argv[0], NULL); |
| 589 | } |
| 590 | |
vadimk | c1cbb18 | 2014-08-31 22:45:29 +0300 | [diff] [blame] | 591 | static int create_netns_dir(void) |
| 592 | { |
| 593 | /* Create the base netns directory if it doesn't exist */ |
| 594 | if (mkdir(NETNS_RUN_DIR, S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)) { |
| 595 | if (errno != EEXIST) { |
| 596 | fprintf(stderr, "mkdir %s failed: %s\n", |
| 597 | NETNS_RUN_DIR, strerror(errno)); |
| 598 | return -1; |
| 599 | } |
| 600 | } |
| 601 | |
| 602 | return 0; |
| 603 | } |
| 604 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 605 | static int netns_add(int argc, char **argv) |
| 606 | { |
| 607 | /* This function creates a new network namespace and |
| 608 | * a new mount namespace and bind them into a well known |
| 609 | * location in the filesystem based on the name provided. |
| 610 | * |
| 611 | * The mount namespace is created so that any necessary |
| 612 | * userspace tweaks like remounting /sys, or bind mounting |
| 613 | * a new /etc/resolv.conf can be shared between uers. |
| 614 | */ |
Felix Janda | ea34366 | 2015-07-26 21:25:32 +0200 | [diff] [blame] | 615 | char netns_path[PATH_MAX]; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 616 | const char *name; |
Eric W. Biederman | 223f4d8 | 2011-07-15 14:29:41 +0000 | [diff] [blame] | 617 | int fd; |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 618 | int made_netns_run_dir_mount = 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 619 | |
| 620 | if (argc < 1) { |
| 621 | fprintf(stderr, "No netns name specified\n"); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 622 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 623 | } |
| 624 | name = argv[0]; |
| 625 | |
| 626 | snprintf(netns_path, sizeof(netns_path), "%s/%s", NETNS_RUN_DIR, name); |
| 627 | |
vadimk | c1cbb18 | 2014-08-31 22:45:29 +0300 | [diff] [blame] | 628 | if (create_netns_dir()) |
| 629 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 630 | |
Stephen Hemminger | d259f03 | 2013-08-04 15:00:56 -0700 | [diff] [blame] | 631 | /* Make it possible for network namespace mounts to propagate between |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 632 | * mount namespaces. This makes it likely that a unmounting a network |
| 633 | * namespace file in one namespace will unmount the network namespace |
| 634 | * file in all namespaces allowing the network namespace to be freed |
| 635 | * sooner. |
| 636 | */ |
| 637 | while (mount("", NETNS_RUN_DIR, "none", MS_SHARED | MS_REC, NULL)) { |
| 638 | /* Fail unless we need to make the mount point */ |
| 639 | if (errno != EINVAL || made_netns_run_dir_mount) { |
| 640 | fprintf(stderr, "mount --make-shared %s failed: %s\n", |
| 641 | NETNS_RUN_DIR, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 642 | return -1; |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 643 | } |
| 644 | |
| 645 | /* Upgrade NETNS_RUN_DIR to a mount point */ |
| 646 | if (mount(NETNS_RUN_DIR, NETNS_RUN_DIR, "none", MS_BIND, NULL)) { |
| 647 | fprintf(stderr, "mount --bind %s %s failed: %s\n", |
| 648 | NETNS_RUN_DIR, NETNS_RUN_DIR, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 649 | return -1; |
Eric W. Biederman | 58a3e82 | 2013-01-17 14:47:18 +0000 | [diff] [blame] | 650 | } |
| 651 | made_netns_run_dir_mount = 1; |
| 652 | } |
| 653 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 654 | /* Create the filesystem state */ |
Eric W. Biederman | 223f4d8 | 2011-07-15 14:29:41 +0000 | [diff] [blame] | 655 | fd = open(netns_path, O_RDONLY|O_CREAT|O_EXCL, 0); |
| 656 | if (fd < 0) { |
Mike Rapoport | 55713c8 | 2014-05-11 12:21:26 +0300 | [diff] [blame] | 657 | fprintf(stderr, "Cannot create namespace file \"%s\": %s\n", |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 658 | netns_path, strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 659 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 660 | } |
Eric W. Biederman | 223f4d8 | 2011-07-15 14:29:41 +0000 | [diff] [blame] | 661 | close(fd); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 662 | if (unshare(CLONE_NEWNET) < 0) { |
Kees van Reeuwijk | 14645ec | 2013-02-08 03:32:36 +0000 | [diff] [blame] | 663 | fprintf(stderr, "Failed to create a new network namespace \"%s\": %s\n", |
| 664 | name, strerror(errno)); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 665 | goto out_delete; |
| 666 | } |
| 667 | |
| 668 | /* Bind the netns last so I can watch for it */ |
| 669 | if (mount("/proc/self/ns/net", netns_path, "none", MS_BIND, NULL) < 0) { |
| 670 | fprintf(stderr, "Bind /proc/self/ns/net -> %s failed: %s\n", |
| 671 | netns_path, strerror(errno)); |
| 672 | goto out_delete; |
| 673 | } |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 674 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 675 | out_delete: |
| 676 | netns_delete(argc, argv); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 677 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 678 | } |
| 679 | |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 680 | static int set_netnsid_from_name(const char *name, int nsid) |
| 681 | { |
| 682 | struct { |
| 683 | struct nlmsghdr n; |
| 684 | struct rtgenmsg g; |
| 685 | char buf[1024]; |
Phil Sutter | d17b136 | 2016-07-18 16:48:42 +0200 | [diff] [blame^] | 686 | } req = { |
| 687 | .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)), |
| 688 | .n.nlmsg_flags = NLM_F_REQUEST, |
| 689 | .n.nlmsg_type = RTM_NEWNSID, |
| 690 | .g.rtgen_family = AF_UNSPEC, |
| 691 | }; |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 692 | int fd, err = 0; |
| 693 | |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 694 | fd = netns_get_fd(name); |
| 695 | if (fd < 0) |
| 696 | return fd; |
| 697 | |
| 698 | addattr32(&req.n, 1024, NETNSA_FD, fd); |
| 699 | addattr32(&req.n, 1024, NETNSA_NSID, nsid); |
Stephen Hemminger | c079e12 | 2015-05-27 12:26:14 -0700 | [diff] [blame] | 700 | if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 701 | err = -2; |
| 702 | |
| 703 | close(fd); |
| 704 | return err; |
| 705 | } |
| 706 | |
| 707 | static int netns_set(int argc, char **argv) |
| 708 | { |
Felix Janda | ea34366 | 2015-07-26 21:25:32 +0200 | [diff] [blame] | 709 | char netns_path[PATH_MAX]; |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 710 | const char *name; |
| 711 | int netns, nsid; |
| 712 | |
| 713 | if (argc < 1) { |
| 714 | fprintf(stderr, "No netns name specified\n"); |
| 715 | return -1; |
| 716 | } |
| 717 | if (argc < 2) { |
| 718 | fprintf(stderr, "No nsid specified\n"); |
| 719 | return -1; |
| 720 | } |
| 721 | name = argv[0]; |
| 722 | nsid = atoi(argv[1]); |
| 723 | |
| 724 | snprintf(netns_path, sizeof(netns_path), "%s/%s", NETNS_RUN_DIR, name); |
| 725 | netns = open(netns_path, O_RDONLY | O_CLOEXEC); |
| 726 | if (netns < 0) { |
| 727 | fprintf(stderr, "Cannot open network namespace \"%s\": %s\n", |
| 728 | name, strerror(errno)); |
| 729 | return -1; |
| 730 | } |
| 731 | |
| 732 | return set_netnsid_from_name(name, nsid); |
| 733 | } |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 734 | |
| 735 | static int netns_monitor(int argc, char **argv) |
| 736 | { |
| 737 | char buf[4096]; |
| 738 | struct inotify_event *event; |
| 739 | int fd; |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 740 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 741 | fd = inotify_init(); |
| 742 | if (fd < 0) { |
| 743 | fprintf(stderr, "inotify_init failed: %s\n", |
| 744 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 745 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 746 | } |
vadimk | c1cbb18 | 2014-08-31 22:45:29 +0300 | [diff] [blame] | 747 | |
| 748 | if (create_netns_dir()) |
| 749 | return -1; |
| 750 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 751 | if (inotify_add_watch(fd, NETNS_RUN_DIR, IN_CREATE | IN_DELETE) < 0) { |
| 752 | fprintf(stderr, "inotify_add_watch failed: %s\n", |
| 753 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 754 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 755 | } |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 756 | for (;;) { |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 757 | ssize_t len = read(fd, buf, sizeof(buf)); |
Stephen Hemminger | 56f5daa | 2016-03-21 11:52:19 -0700 | [diff] [blame] | 758 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 759 | if (len < 0) { |
| 760 | fprintf(stderr, "read failed: %s\n", |
| 761 | strerror(errno)); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 762 | return -1; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 763 | } |
| 764 | for (event = (struct inotify_event *)buf; |
| 765 | (char *)event < &buf[len]; |
| 766 | event = (struct inotify_event *)((char *)event + sizeof(*event) + event->len)) { |
| 767 | if (event->mask & IN_CREATE) |
| 768 | printf("add %s\n", event->name); |
| 769 | if (event->mask & IN_DELETE) |
| 770 | printf("delete %s\n", event->name); |
| 771 | } |
| 772 | } |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 773 | return 0; |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 774 | } |
| 775 | |
| 776 | int do_netns(int argc, char **argv) |
| 777 | { |
Nicolas Dichtel | d652ccb | 2015-04-15 14:23:22 +0200 | [diff] [blame] | 778 | netns_map_init(); |
| 779 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 780 | if (argc < 1) |
| 781 | return netns_list(0, NULL); |
| 782 | |
| 783 | if ((matches(*argv, "list") == 0) || (matches(*argv, "show") == 0) || |
| 784 | (matches(*argv, "lst") == 0)) |
| 785 | return netns_list(argc-1, argv+1); |
| 786 | |
Nicolas Dichtel | d652ccb | 2015-04-15 14:23:22 +0200 | [diff] [blame] | 787 | if ((matches(*argv, "list-id") == 0)) |
| 788 | return netns_list_id(argc-1, argv+1); |
| 789 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 790 | if (matches(*argv, "help") == 0) |
Eric W. Biederman | 8e2d47d | 2013-01-17 14:46:09 +0000 | [diff] [blame] | 791 | return usage(); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 792 | |
| 793 | if (matches(*argv, "add") == 0) |
| 794 | return netns_add(argc-1, argv+1); |
| 795 | |
Nicolas Dichtel | d182ee1 | 2015-02-17 17:30:37 +0100 | [diff] [blame] | 796 | if (matches(*argv, "set") == 0) |
| 797 | return netns_set(argc-1, argv+1); |
| 798 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 799 | if (matches(*argv, "delete") == 0) |
| 800 | return netns_delete(argc-1, argv+1); |
| 801 | |
Eric W. Biederman | 9a7b3d9 | 2013-01-17 14:48:15 +0000 | [diff] [blame] | 802 | if (matches(*argv, "identify") == 0) |
| 803 | return netns_identify(argc-1, argv+1); |
| 804 | |
| 805 | if (matches(*argv, "pids") == 0) |
| 806 | return netns_pids(argc-1, argv+1); |
| 807 | |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 808 | if (matches(*argv, "exec") == 0) |
| 809 | return netns_exec(argc-1, argv+1); |
| 810 | |
| 811 | if (matches(*argv, "monitor") == 0) |
| 812 | return netns_monitor(argc-1, argv+1); |
| 813 | |
| 814 | fprintf(stderr, "Command \"%s\" is unknown, try \"ip netns help\".\n", *argv); |
Stephen Hemminger | a05f651 | 2013-07-12 08:43:23 -0700 | [diff] [blame] | 815 | exit(-1); |
Eric W. Biederman | 0dc34c7 | 2011-07-13 09:48:26 -0700 | [diff] [blame] | 816 | } |