2 3efd8e31 2022-10-23 thomas * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
4 3efd8e31 2022-10-23 thomas * Permission to use, copy, modify, and distribute this software for any
5 3efd8e31 2022-10-23 thomas * purpose with or without fee is hereby granted, provided that the above
6 3efd8e31 2022-10-23 thomas * copyright notice and this permission notice appear in all copies.
8 3efd8e31 2022-10-23 thomas * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 3efd8e31 2022-10-23 thomas * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 3efd8e31 2022-10-23 thomas * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 3efd8e31 2022-10-23 thomas * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 3efd8e31 2022-10-23 thomas * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 3efd8e31 2022-10-23 thomas * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 3efd8e31 2022-10-23 thomas * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 3efd8e31 2022-10-23 thomas #include <sys/queue.h>
18 3efd8e31 2022-10-23 thomas #include <sys/tree.h>
19 3efd8e31 2022-10-23 thomas #include <sys/time.h>
20 3efd8e31 2022-10-23 thomas #include <sys/types.h>
21 3efd8e31 2022-10-23 thomas #include <sys/stat.h>
22 3efd8e31 2022-10-23 thomas #include <sys/socket.h>
23 3efd8e31 2022-10-23 thomas #include <sys/un.h>
24 3efd8e31 2022-10-23 thomas #include <sys/wait.h>
26 3efd8e31 2022-10-23 thomas #include <fcntl.h>
27 3efd8e31 2022-10-23 thomas #include <err.h>
28 3efd8e31 2022-10-23 thomas #include <errno.h>
29 3efd8e31 2022-10-23 thomas #include <event.h>
30 3efd8e31 2022-10-23 thomas #include <limits.h>
31 3efd8e31 2022-10-23 thomas #include <pwd.h>
32 3efd8e31 2022-10-23 thomas #include <grp.h>
33 3efd8e31 2022-10-23 thomas #include <imsg.h>
34 3efd8e31 2022-10-23 thomas #include <sha1.h>
35 3efd8e31 2022-10-23 thomas #include <signal.h>
36 3efd8e31 2022-10-23 thomas #include <siphash.h>
37 3efd8e31 2022-10-23 thomas #include <stdarg.h>
38 3efd8e31 2022-10-23 thomas #include <stdio.h>
39 3efd8e31 2022-10-23 thomas #include <stdlib.h>
40 3efd8e31 2022-10-23 thomas #include <stdlib.h>
41 3efd8e31 2022-10-23 thomas #include <string.h>
42 3efd8e31 2022-10-23 thomas #include <syslog.h>
43 3efd8e31 2022-10-23 thomas #include <unistd.h>
45 3efd8e31 2022-10-23 thomas #include "got_error.h"
46 3efd8e31 2022-10-23 thomas #include "got_opentemp.h"
47 3efd8e31 2022-10-23 thomas #include "got_path.h"
48 3efd8e31 2022-10-23 thomas #include "got_repository.h"
49 3efd8e31 2022-10-23 thomas #include "got_object.h"
50 3efd8e31 2022-10-23 thomas #include "got_reference.h"
52 3efd8e31 2022-10-23 thomas #include "got_lib_delta.h"
53 3efd8e31 2022-10-23 thomas #include "got_lib_object.h"
54 3efd8e31 2022-10-23 thomas #include "got_lib_object_cache.h"
55 3efd8e31 2022-10-23 thomas #include "got_lib_sha1.h"
56 3efd8e31 2022-10-23 thomas #include "got_lib_gitproto.h"
57 3efd8e31 2022-10-23 thomas #include "got_lib_pack.h"
58 3efd8e31 2022-10-23 thomas #include "got_lib_repository.h"
60 3efd8e31 2022-10-23 thomas #include "gotd.h"
61 3efd8e31 2022-10-23 thomas #include "log.h"
62 3efd8e31 2022-10-23 thomas #include "repo_read.h"
63 3efd8e31 2022-10-23 thomas #include "repo_write.h"
65 3efd8e31 2022-10-23 thomas #ifndef nitems
66 3efd8e31 2022-10-23 thomas #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
69 3efd8e31 2022-10-23 thomas struct gotd_client {
70 3efd8e31 2022-10-23 thomas STAILQ_ENTRY(gotd_client) entry;
71 3efd8e31 2022-10-23 thomas enum gotd_client_state state;
72 3efd8e31 2022-10-23 thomas struct gotd_client_capability *capabilities;
73 3efd8e31 2022-10-23 thomas size_t ncapa_alloc;
74 3efd8e31 2022-10-23 thomas size_t ncapabilities;
75 3efd8e31 2022-10-23 thomas uint32_t id;
77 3efd8e31 2022-10-23 thomas int delta_cache_fd;
78 3efd8e31 2022-10-23 thomas struct gotd_imsgev iev;
79 3efd8e31 2022-10-23 thomas struct event tmo;
80 3efd8e31 2022-10-23 thomas uid_t euid;
81 3efd8e31 2022-10-23 thomas gid_t egid;
82 3efd8e31 2022-10-23 thomas struct gotd_child_proc *repo_read;
83 3efd8e31 2022-10-23 thomas struct gotd_child_proc *repo_write;
84 3efd8e31 2022-10-23 thomas char *packfile_path;
85 3efd8e31 2022-10-23 thomas char *packidx_path;
86 3efd8e31 2022-10-23 thomas int nref_updates;
88 3efd8e31 2022-10-23 thomas STAILQ_HEAD(gotd_clients, gotd_client);
90 3efd8e31 2022-10-23 thomas static struct gotd_clients gotd_clients[GOTD_CLIENT_TABLE_SIZE];
91 3efd8e31 2022-10-23 thomas static SIPHASH_KEY clients_hash_key;
92 3efd8e31 2022-10-23 thomas volatile int client_cnt;
93 3efd8e31 2022-10-23 thomas static struct timeval timeout = { 3600, 0 };
94 3efd8e31 2022-10-23 thomas static int inflight;
95 3efd8e31 2022-10-23 thomas static struct gotd gotd;
97 3efd8e31 2022-10-23 thomas void gotd_sighdlr(int sig, short event, void *arg);
98 c902213d 2022-10-29 thomas static void gotd_shutdown(void);
100 3efd8e31 2022-10-23 thomas __dead static void
103 5ac853dc 2022-10-24 thomas fprintf(stderr, "usage: %s [-dv] [-f config-file]\n", getprogname());
107 3efd8e31 2022-10-23 thomas static int
108 3efd8e31 2022-10-23 thomas unix_socket_listen(const char *unix_socket_path, uid_t uid, gid_t gid)
110 3efd8e31 2022-10-23 thomas struct sockaddr_un sun;
111 3efd8e31 2022-10-23 thomas int fd = -1;
112 3efd8e31 2022-10-23 thomas mode_t old_umask, mode;
114 3efd8e31 2022-10-23 thomas fd = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK| SOCK_CLOEXEC, 0);
115 3efd8e31 2022-10-23 thomas if (fd == -1) {
116 3efd8e31 2022-10-23 thomas log_warn("socket");
117 3efd8e31 2022-10-23 thomas return -1;
120 3efd8e31 2022-10-23 thomas sun.sun_family = AF_UNIX;
121 3efd8e31 2022-10-23 thomas if (strlcpy(sun.sun_path, unix_socket_path,
122 3efd8e31 2022-10-23 thomas sizeof(sun.sun_path)) >= sizeof(sun.sun_path)) {
123 3efd8e31 2022-10-23 thomas log_warnx("%s: name too long", unix_socket_path);
124 3efd8e31 2022-10-23 thomas close(fd);
125 3efd8e31 2022-10-23 thomas return -1;
128 3efd8e31 2022-10-23 thomas if (unlink(unix_socket_path) == -1) {
129 3efd8e31 2022-10-23 thomas if (errno != ENOENT) {
130 3efd8e31 2022-10-23 thomas log_warn("unlink %s", unix_socket_path);
131 3efd8e31 2022-10-23 thomas close(fd);
132 3efd8e31 2022-10-23 thomas return -1;
136 3efd8e31 2022-10-23 thomas old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
137 3efd8e31 2022-10-23 thomas mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP;
139 3efd8e31 2022-10-23 thomas if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
140 3efd8e31 2022-10-23 thomas log_warn("bind: %s", unix_socket_path);
141 3efd8e31 2022-10-23 thomas close(fd);
142 3efd8e31 2022-10-23 thomas umask(old_umask);
143 3efd8e31 2022-10-23 thomas return -1;
146 3efd8e31 2022-10-23 thomas umask(old_umask);
148 3efd8e31 2022-10-23 thomas if (chmod(unix_socket_path, mode) == -1) {
149 3efd8e31 2022-10-23 thomas log_warn("chmod %o %s", mode, unix_socket_path);
150 3efd8e31 2022-10-23 thomas close(fd);
151 3efd8e31 2022-10-23 thomas unlink(unix_socket_path);
152 3efd8e31 2022-10-23 thomas return -1;
155 3efd8e31 2022-10-23 thomas if (chown(unix_socket_path, uid, gid) == -1) {
156 3efd8e31 2022-10-23 thomas log_warn("chown %s uid=%d gid=%d", unix_socket_path, uid, gid);
157 3efd8e31 2022-10-23 thomas close(fd);
158 3efd8e31 2022-10-23 thomas unlink(unix_socket_path);
159 3efd8e31 2022-10-23 thomas return -1;
162 3efd8e31 2022-10-23 thomas if (listen(fd, GOTD_UNIX_SOCKET_BACKLOG) == -1) {
163 3efd8e31 2022-10-23 thomas log_warn("listen");
164 3efd8e31 2022-10-23 thomas close(fd);
165 3efd8e31 2022-10-23 thomas unlink(unix_socket_path);
166 3efd8e31 2022-10-23 thomas return -1;
169 3efd8e31 2022-10-23 thomas return fd;
172 3efd8e31 2022-10-23 thomas static struct group *
173 3efd8e31 2022-10-23 thomas match_group(gid_t *groups, int ngroups, const char *unix_group_name)
175 3efd8e31 2022-10-23 thomas struct group *gr;
178 3efd8e31 2022-10-23 thomas for (i = 0; i < ngroups; i++) {
179 3efd8e31 2022-10-23 thomas gr = getgrgid(groups[i]);
180 3efd8e31 2022-10-23 thomas if (gr == NULL) {
181 3efd8e31 2022-10-23 thomas log_warn("getgrgid %d", groups[i]);
182 3efd8e31 2022-10-23 thomas continue;
184 3efd8e31 2022-10-23 thomas if (strcmp(gr->gr_name, unix_group_name) == 0)
185 3efd8e31 2022-10-23 thomas return gr;
188 3efd8e31 2022-10-23 thomas return NULL;
191 3efd8e31 2022-10-23 thomas static int
192 3efd8e31 2022-10-23 thomas accept_reserve(int fd, struct sockaddr *addr, socklen_t *addrlen,
193 3efd8e31 2022-10-23 thomas int reserve, volatile int *counter)
197 3efd8e31 2022-10-23 thomas if (getdtablecount() + reserve +
198 3efd8e31 2022-10-23 thomas ((*counter + 1) * GOTD_FD_NEEDED) >= getdtablesize()) {
199 3efd8e31 2022-10-23 thomas log_debug("inflight fds exceeded");
200 3efd8e31 2022-10-23 thomas errno = EMFILE;
201 3efd8e31 2022-10-23 thomas return -1;
204 3efd8e31 2022-10-23 thomas if ((ret = accept4(fd, addr, addrlen,
205 3efd8e31 2022-10-23 thomas SOCK_NONBLOCK | SOCK_CLOEXEC)) > -1) {
206 3efd8e31 2022-10-23 thomas (*counter)++;
209 3efd8e31 2022-10-23 thomas return ret;
212 3efd8e31 2022-10-23 thomas static uint64_t
213 3efd8e31 2022-10-23 thomas client_hash(uint32_t client_id)
215 3efd8e31 2022-10-23 thomas return SipHash24(&clients_hash_key, &client_id, sizeof(client_id));
218 3efd8e31 2022-10-23 thomas static void
219 3efd8e31 2022-10-23 thomas add_client(struct gotd_client *client)
221 3efd8e31 2022-10-23 thomas uint64_t slot = client_hash(client->id) % nitems(gotd_clients);
222 3efd8e31 2022-10-23 thomas STAILQ_INSERT_HEAD(&gotd_clients[slot], client, entry);
223 3efd8e31 2022-10-23 thomas client_cnt++;
226 3efd8e31 2022-10-23 thomas static struct gotd_client *
227 3efd8e31 2022-10-23 thomas find_client(uint32_t client_id)
229 3efd8e31 2022-10-23 thomas uint64_t slot;
230 3efd8e31 2022-10-23 thomas struct gotd_client *c;
232 3efd8e31 2022-10-23 thomas slot = client_hash(client_id) % nitems(gotd_clients);
233 3efd8e31 2022-10-23 thomas STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
234 3efd8e31 2022-10-23 thomas if (c->id == client_id)
235 3efd8e31 2022-10-23 thomas return c;
238 3efd8e31 2022-10-23 thomas return NULL;
241 3efd8e31 2022-10-23 thomas static uint32_t
242 3efd8e31 2022-10-23 thomas get_client_id(void)
244 3efd8e31 2022-10-23 thomas int duplicate = 0;
245 3efd8e31 2022-10-23 thomas uint32_t id;
248 3efd8e31 2022-10-23 thomas id = arc4random();
249 3efd8e31 2022-10-23 thomas duplicate = (find_client(id) != NULL);
250 3efd8e31 2022-10-23 thomas } while (duplicate || id == 0);
252 3efd8e31 2022-10-23 thomas return id;
255 3efd8e31 2022-10-23 thomas static struct gotd_child_proc *
256 3efd8e31 2022-10-23 thomas get_client_proc(struct gotd_client *client)
258 3efd8e31 2022-10-23 thomas if (client->repo_read && client->repo_write) {
259 3efd8e31 2022-10-23 thomas fatalx("uid %d is reading and writing in the same session",
260 3efd8e31 2022-10-23 thomas client->euid);
261 3efd8e31 2022-10-23 thomas /* NOTREACHED */
264 3efd8e31 2022-10-23 thomas if (client->repo_read)
265 3efd8e31 2022-10-23 thomas return client->repo_read;
266 3efd8e31 2022-10-23 thomas else if (client->repo_write)
267 3efd8e31 2022-10-23 thomas return client->repo_write;
269 3efd8e31 2022-10-23 thomas return NULL;
272 3efd8e31 2022-10-23 thomas static int
273 3efd8e31 2022-10-23 thomas client_is_reading(struct gotd_client *client)
275 3efd8e31 2022-10-23 thomas return client->repo_read != NULL;
278 3efd8e31 2022-10-23 thomas static int
279 3efd8e31 2022-10-23 thomas client_is_writing(struct gotd_client *client)
281 3efd8e31 2022-10-23 thomas return client->repo_write != NULL;
284 3efd8e31 2022-10-23 thomas static const struct got_error *
285 3efd8e31 2022-10-23 thomas ensure_client_is_reading(struct gotd_client *client)
287 3efd8e31 2022-10-23 thomas if (!client_is_reading(client)) {
288 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
289 3efd8e31 2022-10-23 thomas "uid %d made a read-request but is not reading from "
290 3efd8e31 2022-10-23 thomas "a repository", client->euid);
293 3efd8e31 2022-10-23 thomas return NULL;
296 3efd8e31 2022-10-23 thomas static const struct got_error *
297 3efd8e31 2022-10-23 thomas ensure_client_is_writing(struct gotd_client *client)
299 3efd8e31 2022-10-23 thomas if (!client_is_writing(client)) {
300 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
301 3efd8e31 2022-10-23 thomas "uid %d made a write-request but is not writing to "
302 3efd8e31 2022-10-23 thomas "a repository", client->euid);
305 3efd8e31 2022-10-23 thomas return NULL;
308 3efd8e31 2022-10-23 thomas static const struct got_error *
309 3efd8e31 2022-10-23 thomas ensure_client_is_not_writing(struct gotd_client *client)
311 3efd8e31 2022-10-23 thomas if (client_is_writing(client)) {
312 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
313 3efd8e31 2022-10-23 thomas "uid %d made a read-request but is writing to "
314 3efd8e31 2022-10-23 thomas "a repository", client->euid);
317 3efd8e31 2022-10-23 thomas return NULL;
320 3efd8e31 2022-10-23 thomas static const struct got_error *
321 3efd8e31 2022-10-23 thomas ensure_client_is_not_reading(struct gotd_client *client)
323 3efd8e31 2022-10-23 thomas if (client_is_reading(client)) {
324 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
325 3efd8e31 2022-10-23 thomas "uid %d made a write-request but is reading from "
326 3efd8e31 2022-10-23 thomas "a repository", client->euid);
329 3efd8e31 2022-10-23 thomas return NULL;
332 3efd8e31 2022-10-23 thomas static void
333 3efd8e31 2022-10-23 thomas disconnect(struct gotd_client *client)
335 3efd8e31 2022-10-23 thomas struct gotd_imsg_disconnect idisconnect;
336 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc = get_client_proc(client);
337 3efd8e31 2022-10-23 thomas uint64_t slot;
339 3efd8e31 2022-10-23 thomas log_debug("uid %d: disconnecting", client->euid);
341 3efd8e31 2022-10-23 thomas idisconnect.client_id = client->id;
342 c902213d 2022-10-29 thomas if (proc) {
343 c902213d 2022-10-29 thomas if (gotd_imsg_compose_event(&proc->iev,
344 c902213d 2022-10-29 thomas GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
345 c902213d 2022-10-29 thomas &idisconnect, sizeof(idisconnect)) == -1)
346 c902213d 2022-10-29 thomas log_warn("imsg compose DISCONNECT");
348 3efd8e31 2022-10-23 thomas slot = client_hash(client->id) % nitems(gotd_clients);
349 3efd8e31 2022-10-23 thomas STAILQ_REMOVE(&gotd_clients[slot], client, gotd_client, entry);
350 3efd8e31 2022-10-23 thomas imsg_clear(&client->iev.ibuf);
351 3efd8e31 2022-10-23 thomas event_del(&client->iev.ev);
352 3efd8e31 2022-10-23 thomas evtimer_del(&client->tmo);
353 3efd8e31 2022-10-23 thomas close(client->fd);
354 3efd8e31 2022-10-23 thomas if (client->delta_cache_fd != -1)
355 3efd8e31 2022-10-23 thomas close(client->delta_cache_fd);
356 3efd8e31 2022-10-23 thomas if (client->packfile_path) {
357 3efd8e31 2022-10-23 thomas if (unlink(client->packfile_path) == -1 && errno != ENOENT)
358 3efd8e31 2022-10-23 thomas log_warn("unlink %s: ", client->packfile_path);
359 3efd8e31 2022-10-23 thomas free(client->packfile_path);
361 3efd8e31 2022-10-23 thomas if (client->packidx_path) {
362 3efd8e31 2022-10-23 thomas if (unlink(client->packidx_path) == -1 && errno != ENOENT)
363 3efd8e31 2022-10-23 thomas log_warn("unlink %s: ", client->packidx_path);
364 3efd8e31 2022-10-23 thomas free(client->packidx_path);
366 3efd8e31 2022-10-23 thomas free(client->capabilities);
367 3efd8e31 2022-10-23 thomas free(client);
368 3efd8e31 2022-10-23 thomas inflight--;
369 3efd8e31 2022-10-23 thomas client_cnt--;
372 3efd8e31 2022-10-23 thomas static void
373 3efd8e31 2022-10-23 thomas disconnect_on_error(struct gotd_client *client, const struct got_error *err)
375 3efd8e31 2022-10-23 thomas struct imsgbuf ibuf;
377 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
378 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_EOF) {
379 3efd8e31 2022-10-23 thomas imsg_init(&ibuf, client->fd);
380 3efd8e31 2022-10-23 thomas gotd_imsg_send_error(&ibuf, 0, PROC_GOTD, err);
381 3efd8e31 2022-10-23 thomas imsg_clear(&ibuf);
383 3efd8e31 2022-10-23 thomas disconnect(client);
386 c902213d 2022-10-29 thomas static const struct got_error *
387 c902213d 2022-10-29 thomas send_repo_info(struct gotd_imsgev *iev, struct gotd_repo *repo)
389 c902213d 2022-10-29 thomas const struct got_error *err = NULL;
390 c902213d 2022-10-29 thomas struct gotd_imsg_info_repo irepo;
392 c902213d 2022-10-29 thomas memset(&irepo, 0, sizeof(irepo));
394 c902213d 2022-10-29 thomas if (strlcpy(irepo.repo_name, repo->name, sizeof(irepo.repo_name))
395 c902213d 2022-10-29 thomas >= sizeof(irepo.repo_name))
396 c902213d 2022-10-29 thomas return got_error_msg(GOT_ERR_NO_SPACE, "repo name too long");
397 c902213d 2022-10-29 thomas if (strlcpy(irepo.repo_path, repo->path, sizeof(irepo.repo_path))
398 c902213d 2022-10-29 thomas >= sizeof(irepo.repo_path))
399 c902213d 2022-10-29 thomas return got_error_msg(GOT_ERR_NO_SPACE, "repo path too long");
401 c902213d 2022-10-29 thomas if (gotd_imsg_compose_event(iev, GOTD_IMSG_INFO_REPO, PROC_GOTD, -1,
402 c902213d 2022-10-29 thomas &irepo, sizeof(irepo)) == -1) {
403 c902213d 2022-10-29 thomas err = got_error_from_errno("imsg compose INFO_REPO");
405 c902213d 2022-10-29 thomas return err;
408 c902213d 2022-10-29 thomas return NULL;
411 c902213d 2022-10-29 thomas static const struct got_error *
412 c902213d 2022-10-29 thomas send_capability(struct gotd_client_capability *capa, struct gotd_imsgev* iev)
414 c902213d 2022-10-29 thomas const struct got_error *err = NULL;
415 c902213d 2022-10-29 thomas struct gotd_imsg_capability icapa;
416 c902213d 2022-10-29 thomas size_t len;
417 c902213d 2022-10-29 thomas struct ibuf *wbuf;
419 c902213d 2022-10-29 thomas memset(&icapa, 0, sizeof(icapa));
421 c902213d 2022-10-29 thomas icapa.key_len = strlen(capa->key);
422 c902213d 2022-10-29 thomas len = sizeof(icapa) + icapa.key_len;
423 c902213d 2022-10-29 thomas if (capa->value) {
424 c902213d 2022-10-29 thomas icapa.value_len = strlen(capa->value);
425 c902213d 2022-10-29 thomas len += icapa.value_len;
428 c902213d 2022-10-29 thomas wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_CAPABILITY, 0, 0, len);
429 c902213d 2022-10-29 thomas if (wbuf == NULL) {
430 c902213d 2022-10-29 thomas err = got_error_from_errno("imsg_create CAPABILITY");
431 c902213d 2022-10-29 thomas return err;
434 c902213d 2022-10-29 thomas if (imsg_add(wbuf, &icapa, sizeof(icapa)) == -1)
435 c902213d 2022-10-29 thomas return got_error_from_errno("imsg_add CAPABILITY");
436 c902213d 2022-10-29 thomas if (imsg_add(wbuf, capa->key, icapa.key_len) == -1)
437 c902213d 2022-10-29 thomas return got_error_from_errno("imsg_add CAPABILITY");
438 c902213d 2022-10-29 thomas if (capa->value) {
439 c902213d 2022-10-29 thomas if (imsg_add(wbuf, capa->value, icapa.value_len) == -1)
440 c902213d 2022-10-29 thomas return got_error_from_errno("imsg_add CAPABILITY");
443 c902213d 2022-10-29 thomas wbuf->fd = -1;
444 c902213d 2022-10-29 thomas imsg_close(&iev->ibuf, wbuf);
446 c902213d 2022-10-29 thomas gotd_imsg_event_add(iev);
448 c902213d 2022-10-29 thomas return NULL;
451 c902213d 2022-10-29 thomas static const struct got_error *
452 c902213d 2022-10-29 thomas send_client_info(struct gotd_imsgev *iev, struct gotd_client *client)
454 c902213d 2022-10-29 thomas const struct got_error *err = NULL;
455 c902213d 2022-10-29 thomas struct gotd_imsg_info_client iclient;
456 c902213d 2022-10-29 thomas struct gotd_child_proc *proc;
457 c902213d 2022-10-29 thomas size_t i;
459 c902213d 2022-10-29 thomas memset(&iclient, 0, sizeof(iclient));
460 c902213d 2022-10-29 thomas iclient.euid = client->euid;
461 c902213d 2022-10-29 thomas iclient.egid = client->egid;
463 c902213d 2022-10-29 thomas proc = get_client_proc(client);
464 c902213d 2022-10-29 thomas if (proc) {
465 c902213d 2022-10-29 thomas if (strlcpy(iclient.repo_name, proc->chroot_path,
466 c902213d 2022-10-29 thomas sizeof(iclient.repo_name)) >= sizeof(iclient.repo_name)) {
467 c902213d 2022-10-29 thomas return got_error_msg(GOT_ERR_NO_SPACE,
468 c902213d 2022-10-29 thomas "repo name too long");
470 c902213d 2022-10-29 thomas if (client_is_writing(client))
471 c902213d 2022-10-29 thomas iclient.is_writing = 1;
474 c902213d 2022-10-29 thomas iclient.state = client->state;
475 c902213d 2022-10-29 thomas iclient.ncapabilities = client->ncapabilities;
477 c902213d 2022-10-29 thomas if (gotd_imsg_compose_event(iev, GOTD_IMSG_INFO_CLIENT, PROC_GOTD, -1,
478 c902213d 2022-10-29 thomas &iclient, sizeof(iclient)) == -1) {
479 c902213d 2022-10-29 thomas err = got_error_from_errno("imsg compose INFO_CLIENT");
481 c902213d 2022-10-29 thomas return err;
484 c902213d 2022-10-29 thomas for (i = 0; i < client->ncapabilities; i++) {
485 c902213d 2022-10-29 thomas struct gotd_client_capability *capa;
486 c902213d 2022-10-29 thomas capa = &client->capabilities[i];
487 c902213d 2022-10-29 thomas err = send_capability(capa, iev);
489 c902213d 2022-10-29 thomas return err;
492 c902213d 2022-10-29 thomas return NULL;
495 c902213d 2022-10-29 thomas static const struct got_error *
496 c902213d 2022-10-29 thomas send_info(struct gotd_client *client)
498 c902213d 2022-10-29 thomas const struct got_error *err = NULL;
499 c902213d 2022-10-29 thomas struct gotd_imsg_info info;
500 c902213d 2022-10-29 thomas uint64_t slot;
501 c902213d 2022-10-29 thomas struct gotd_repo *repo;
503 c902213d 2022-10-29 thomas info.pid = gotd.pid;
504 c902213d 2022-10-29 thomas info.verbosity = gotd.verbosity;
505 c902213d 2022-10-29 thomas info.nrepos = gotd.nrepos;
506 c902213d 2022-10-29 thomas info.nclients = client_cnt - 1;
508 c902213d 2022-10-29 thomas if (gotd_imsg_compose_event(&client->iev, GOTD_IMSG_INFO, PROC_GOTD, -1,
509 c902213d 2022-10-29 thomas &info, sizeof(info)) == -1) {
510 c902213d 2022-10-29 thomas err = got_error_from_errno("imsg compose INFO");
512 c902213d 2022-10-29 thomas return err;
515 c902213d 2022-10-29 thomas TAILQ_FOREACH(repo, &gotd.repos, entry) {
516 c902213d 2022-10-29 thomas err = send_repo_info(&client->iev, repo);
518 c902213d 2022-10-29 thomas return err;
521 c902213d 2022-10-29 thomas for (slot = 0; slot < nitems(gotd_clients); slot++) {
522 c902213d 2022-10-29 thomas struct gotd_client *c;
523 c902213d 2022-10-29 thomas STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
524 c902213d 2022-10-29 thomas if (c->id == client->id)
525 c902213d 2022-10-29 thomas continue;
526 c902213d 2022-10-29 thomas err = send_client_info(&client->iev, c);
528 c902213d 2022-10-29 thomas return err;
532 c902213d 2022-10-29 thomas return NULL;
535 c902213d 2022-10-29 thomas static const struct got_error *
536 c902213d 2022-10-29 thomas stop_gotd(struct gotd_client *client)
539 c902213d 2022-10-29 thomas if (client->euid != 0)
540 c902213d 2022-10-29 thomas return got_error_set_errno(EPERM, "stop");
542 c902213d 2022-10-29 thomas gotd_shutdown();
543 c902213d 2022-10-29 thomas /* NOTREACHED */
544 c902213d 2022-10-29 thomas return NULL;
547 3efd8e31 2022-10-23 thomas static struct gotd_child_proc *
548 3efd8e31 2022-10-23 thomas find_proc_by_repo_name(enum gotd_procid proc_id, const char *repo_name)
550 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
552 3efd8e31 2022-10-23 thomas size_t namelen;
554 3efd8e31 2022-10-23 thomas for (i = 0; i < gotd.nprocs; i++) {
555 3efd8e31 2022-10-23 thomas proc = &gotd.procs[i];
556 3efd8e31 2022-10-23 thomas if (proc->type != proc_id)
557 3efd8e31 2022-10-23 thomas continue;
558 3efd8e31 2022-10-23 thomas namelen = strlen(proc->repo_name);
559 3efd8e31 2022-10-23 thomas if (strncmp(proc->repo_name, repo_name, namelen) != 0)
560 3efd8e31 2022-10-23 thomas continue;
561 3efd8e31 2022-10-23 thomas if (repo_name[namelen] == '\0' ||
562 3efd8e31 2022-10-23 thomas strcmp(&repo_name[namelen], ".git") == 0)
563 3efd8e31 2022-10-23 thomas return proc;
566 3efd8e31 2022-10-23 thomas return NULL;
569 3efd8e31 2022-10-23 thomas static struct gotd_child_proc *
570 3efd8e31 2022-10-23 thomas find_proc_by_fd(int fd)
572 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
575 3efd8e31 2022-10-23 thomas for (i = 0; i < gotd.nprocs; i++) {
576 3efd8e31 2022-10-23 thomas proc = &gotd.procs[i];
577 3efd8e31 2022-10-23 thomas if (proc->iev.ibuf.fd == fd)
578 3efd8e31 2022-10-23 thomas return proc;
581 3efd8e31 2022-10-23 thomas return NULL;
584 3efd8e31 2022-10-23 thomas static const struct got_error *
585 3efd8e31 2022-10-23 thomas forward_list_refs_request(struct gotd_client *client, struct imsg *imsg)
587 3efd8e31 2022-10-23 thomas const struct got_error *err;
588 3efd8e31 2022-10-23 thomas struct gotd_imsg_list_refs ireq;
589 3efd8e31 2022-10-23 thomas struct gotd_imsg_list_refs_internal ilref;
590 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc = NULL;
591 3efd8e31 2022-10-23 thomas size_t datalen;
592 3efd8e31 2022-10-23 thomas int fd = -1;
594 3efd8e31 2022-10-23 thomas log_debug("list-refs request from uid %d", client->euid);
596 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
597 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireq))
598 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
600 3efd8e31 2022-10-23 thomas memcpy(&ireq, imsg->data, datalen);
602 3efd8e31 2022-10-23 thomas memset(&ilref, 0, sizeof(ilref));
603 3efd8e31 2022-10-23 thomas ilref.client_id = client->id;
605 3efd8e31 2022-10-23 thomas if (ireq.client_is_reading) {
606 3efd8e31 2022-10-23 thomas err = ensure_client_is_not_writing(client);
608 3efd8e31 2022-10-23 thomas return err;
609 3efd8e31 2022-10-23 thomas client->repo_read = find_proc_by_repo_name(PROC_REPO_READ,
610 3efd8e31 2022-10-23 thomas ireq.repo_name);
611 3efd8e31 2022-10-23 thomas if (client->repo_read == NULL)
612 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_NOT_GIT_REPO);
614 3efd8e31 2022-10-23 thomas err = ensure_client_is_not_reading(client);
616 3efd8e31 2022-10-23 thomas return err;
617 3efd8e31 2022-10-23 thomas client->repo_write = find_proc_by_repo_name(PROC_REPO_WRITE,
618 3efd8e31 2022-10-23 thomas ireq.repo_name);
619 3efd8e31 2022-10-23 thomas if (client->repo_write == NULL)
620 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_NOT_GIT_REPO);
623 3efd8e31 2022-10-23 thomas fd = dup(client->fd);
624 3efd8e31 2022-10-23 thomas if (fd == -1)
625 3efd8e31 2022-10-23 thomas return got_error_from_errno("dup");
627 3efd8e31 2022-10-23 thomas proc = get_client_proc(client);
628 c902213d 2022-10-29 thomas if (proc == NULL)
629 c902213d 2022-10-29 thomas fatalx("no process found for uid %d", client->euid);
630 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&proc->iev,
631 3efd8e31 2022-10-23 thomas GOTD_IMSG_LIST_REFS_INTERNAL, PROC_GOTD, fd,
632 3efd8e31 2022-10-23 thomas &ilref, sizeof(ilref)) == -1) {
633 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose WANT");
634 3efd8e31 2022-10-23 thomas close(fd);
635 3efd8e31 2022-10-23 thomas return err;
638 3efd8e31 2022-10-23 thomas return NULL;
641 3efd8e31 2022-10-23 thomas static const struct got_error *
642 3efd8e31 2022-10-23 thomas forward_want(struct gotd_client *client, struct imsg *imsg)
644 3efd8e31 2022-10-23 thomas struct gotd_imsg_want ireq;
645 3efd8e31 2022-10-23 thomas struct gotd_imsg_want iwant;
646 3efd8e31 2022-10-23 thomas size_t datalen;
648 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
649 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireq))
650 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
652 3efd8e31 2022-10-23 thomas memcpy(&ireq, imsg->data, datalen);
654 3efd8e31 2022-10-23 thomas memset(&iwant, 0, sizeof(iwant));
655 3efd8e31 2022-10-23 thomas memcpy(iwant.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
656 3efd8e31 2022-10-23 thomas iwant.client_id = client->id;
658 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev, GOTD_IMSG_WANT,
659 3efd8e31 2022-10-23 thomas PROC_GOTD, -1, &iwant, sizeof(iwant)) == -1)
660 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg compose WANT");
662 3efd8e31 2022-10-23 thomas return NULL;
665 3efd8e31 2022-10-23 thomas static const struct got_error *
666 3efd8e31 2022-10-23 thomas forward_ref_update(struct gotd_client *client, struct imsg *imsg)
668 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
669 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update ireq;
670 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update *iref = NULL;
671 3efd8e31 2022-10-23 thomas size_t datalen;
673 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
674 3efd8e31 2022-10-23 thomas if (datalen < sizeof(ireq))
675 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
676 3efd8e31 2022-10-23 thomas memcpy(&ireq, imsg->data, sizeof(ireq));
677 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireq) + ireq.name_len)
678 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
680 3efd8e31 2022-10-23 thomas iref = malloc(datalen);
681 3efd8e31 2022-10-23 thomas if (iref == NULL)
682 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
683 3efd8e31 2022-10-23 thomas memcpy(iref, imsg->data, datalen);
685 3efd8e31 2022-10-23 thomas iref->client_id = client->id;
686 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
687 3efd8e31 2022-10-23 thomas GOTD_IMSG_REF_UPDATE, PROC_GOTD, -1, iref, datalen) == -1)
688 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose REF_UPDATE");
689 3efd8e31 2022-10-23 thomas free(iref);
690 3efd8e31 2022-10-23 thomas return err;
693 3efd8e31 2022-10-23 thomas static const struct got_error *
694 3efd8e31 2022-10-23 thomas forward_have(struct gotd_client *client, struct imsg *imsg)
696 3efd8e31 2022-10-23 thomas struct gotd_imsg_have ireq;
697 3efd8e31 2022-10-23 thomas struct gotd_imsg_have ihave;
698 3efd8e31 2022-10-23 thomas size_t datalen;
700 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
701 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireq))
702 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
704 3efd8e31 2022-10-23 thomas memcpy(&ireq, imsg->data, datalen);
706 3efd8e31 2022-10-23 thomas memset(&ihave, 0, sizeof(ihave));
707 3efd8e31 2022-10-23 thomas memcpy(ihave.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
708 3efd8e31 2022-10-23 thomas ihave.client_id = client->id;
710 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev, GOTD_IMSG_HAVE,
711 3efd8e31 2022-10-23 thomas PROC_GOTD, -1, &ihave, sizeof(ihave)) == -1)
712 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg compose HAVE");
714 3efd8e31 2022-10-23 thomas return NULL;
717 3efd8e31 2022-10-23 thomas static int
718 3efd8e31 2022-10-23 thomas client_has_capability(struct gotd_client *client, const char *capastr)
720 3efd8e31 2022-10-23 thomas struct gotd_client_capability *capa;
721 3efd8e31 2022-10-23 thomas size_t i;
723 3efd8e31 2022-10-23 thomas if (client->ncapabilities == 0)
724 3efd8e31 2022-10-23 thomas return 0;
726 3efd8e31 2022-10-23 thomas for (i = 0; i < client->ncapabilities; i++) {
727 3efd8e31 2022-10-23 thomas capa = &client->capabilities[i];
728 3efd8e31 2022-10-23 thomas if (strcmp(capa->key, capastr) == 0)
729 3efd8e31 2022-10-23 thomas return 1;
732 3efd8e31 2022-10-23 thomas return 0;
735 3efd8e31 2022-10-23 thomas static const struct got_error *
736 3efd8e31 2022-10-23 thomas recv_capabilities(struct gotd_client *client, struct imsg *imsg)
738 3efd8e31 2022-10-23 thomas struct gotd_imsg_capabilities icapas;
739 3efd8e31 2022-10-23 thomas size_t datalen;
741 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
742 3efd8e31 2022-10-23 thomas if (datalen != sizeof(icapas))
743 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
744 3efd8e31 2022-10-23 thomas memcpy(&icapas, imsg->data, sizeof(icapas));
746 3efd8e31 2022-10-23 thomas client->ncapa_alloc = icapas.ncapabilities;
747 3efd8e31 2022-10-23 thomas client->capabilities = calloc(client->ncapa_alloc,
748 3efd8e31 2022-10-23 thomas sizeof(*client->capabilities));
749 3efd8e31 2022-10-23 thomas if (client->capabilities == NULL) {
750 3efd8e31 2022-10-23 thomas client->ncapa_alloc = 0;
751 3efd8e31 2022-10-23 thomas return got_error_from_errno("calloc");
754 3efd8e31 2022-10-23 thomas log_debug("expecting %zu capabilities from uid %d",
755 3efd8e31 2022-10-23 thomas client->ncapa_alloc, client->euid);
756 3efd8e31 2022-10-23 thomas return NULL;
759 3efd8e31 2022-10-23 thomas static const struct got_error *
760 3efd8e31 2022-10-23 thomas recv_capability(struct gotd_client *client, struct imsg *imsg)
762 3efd8e31 2022-10-23 thomas struct gotd_imsg_capability icapa;
763 3efd8e31 2022-10-23 thomas struct gotd_client_capability *capa;
764 3efd8e31 2022-10-23 thomas size_t datalen;
765 3efd8e31 2022-10-23 thomas char *key, *value = NULL;
767 3efd8e31 2022-10-23 thomas if (client->capabilities == NULL ||
768 3efd8e31 2022-10-23 thomas client->ncapabilities >= client->ncapa_alloc) {
769 3efd8e31 2022-10-23 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
770 3efd8e31 2022-10-23 thomas "unexpected capability received");
773 3efd8e31 2022-10-23 thomas memset(&icapa, 0, sizeof(icapa));
775 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
776 3efd8e31 2022-10-23 thomas if (datalen < sizeof(icapa))
777 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
778 3efd8e31 2022-10-23 thomas memcpy(&icapa, imsg->data, sizeof(icapa));
780 3efd8e31 2022-10-23 thomas if (datalen != sizeof(icapa) + icapa.key_len + icapa.value_len)
781 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
783 3efd8e31 2022-10-23 thomas key = malloc(icapa.key_len + 1);
784 3efd8e31 2022-10-23 thomas if (key == NULL)
785 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
786 3efd8e31 2022-10-23 thomas if (icapa.value_len > 0) {
787 3efd8e31 2022-10-23 thomas value = malloc(icapa.value_len + 1);
788 3efd8e31 2022-10-23 thomas if (value == NULL) {
789 3efd8e31 2022-10-23 thomas free(key);
790 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
794 3efd8e31 2022-10-23 thomas memcpy(key, imsg->data + sizeof(icapa), icapa.key_len);
795 3efd8e31 2022-10-23 thomas key[icapa.key_len] = '\0';
796 3efd8e31 2022-10-23 thomas if (value) {
797 3efd8e31 2022-10-23 thomas memcpy(value, imsg->data + sizeof(icapa) + icapa.key_len,
798 3efd8e31 2022-10-23 thomas icapa.value_len);
799 3efd8e31 2022-10-23 thomas value[icapa.value_len] = '\0';
802 3efd8e31 2022-10-23 thomas capa = &client->capabilities[client->ncapabilities++];
803 3efd8e31 2022-10-23 thomas capa->key = key;
804 3efd8e31 2022-10-23 thomas capa->value = value;
806 3efd8e31 2022-10-23 thomas if (value)
807 3efd8e31 2022-10-23 thomas log_debug("uid %d: capability %s=%s", client->euid, key, value);
809 3efd8e31 2022-10-23 thomas log_debug("uid %d: capability %s", client->euid, key);
811 3efd8e31 2022-10-23 thomas return NULL;
814 3efd8e31 2022-10-23 thomas static const struct got_error *
815 3efd8e31 2022-10-23 thomas send_packfile(struct gotd_client *client)
817 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
818 3efd8e31 2022-10-23 thomas struct gotd_imsg_send_packfile ipack;
819 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_pipe ipipe;
820 3efd8e31 2022-10-23 thomas int pipe[2];
822 3efd8e31 2022-10-23 thomas if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
823 3efd8e31 2022-10-23 thomas return got_error_from_errno("socketpair");
825 3efd8e31 2022-10-23 thomas memset(&ipack, 0, sizeof(ipack));
826 3efd8e31 2022-10-23 thomas memset(&ipipe, 0, sizeof(ipipe));
828 3efd8e31 2022-10-23 thomas ipack.client_id = client->id;
829 3efd8e31 2022-10-23 thomas if (client_has_capability(client, GOT_CAPA_SIDE_BAND_64K))
830 3efd8e31 2022-10-23 thomas ipack.report_progress = 1;
832 3efd8e31 2022-10-23 thomas client->delta_cache_fd = got_opentempfd();
833 3efd8e31 2022-10-23 thomas if (client->delta_cache_fd == -1)
834 3efd8e31 2022-10-23 thomas return got_error_from_errno("got_opentempfd");
836 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev,
837 3efd8e31 2022-10-23 thomas GOTD_IMSG_SEND_PACKFILE, PROC_GOTD, client->delta_cache_fd,
838 3efd8e31 2022-10-23 thomas &ipack, sizeof(ipack)) == -1) {
839 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose SEND_PACKFILE");
840 3efd8e31 2022-10-23 thomas close(pipe[0]);
841 3efd8e31 2022-10-23 thomas close(pipe[1]);
842 3efd8e31 2022-10-23 thomas return err;
845 3efd8e31 2022-10-23 thomas ipipe.client_id = client->id;
847 cc4cc677 2022-10-28 thomas /* Send pack pipe end 0 to repo_read. */
848 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev,
849 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[0],
850 3efd8e31 2022-10-23 thomas &ipipe, sizeof(ipipe)) == -1) {
851 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
852 3efd8e31 2022-10-23 thomas close(pipe[1]);
853 3efd8e31 2022-10-23 thomas return err;
856 cc4cc677 2022-10-28 thomas /* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
857 cc4cc677 2022-10-28 thomas if (gotd_imsg_compose_event(&client->iev,
858 cc4cc677 2022-10-28 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1], NULL, 0) == -1)
859 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
861 3efd8e31 2022-10-23 thomas return err;
864 3efd8e31 2022-10-23 thomas static const struct got_error *
865 3efd8e31 2022-10-23 thomas recv_packfile(struct gotd_client *client)
867 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
868 3efd8e31 2022-10-23 thomas struct gotd_imsg_recv_packfile ipack;
869 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_pipe ipipe;
870 3efd8e31 2022-10-23 thomas struct gotd_imsg_packidx_file ifile;
871 3efd8e31 2022-10-23 thomas char *basepath = NULL, *pack_path = NULL, *idx_path = NULL;
872 3efd8e31 2022-10-23 thomas int packfd = -1, idxfd = -1;
873 3efd8e31 2022-10-23 thomas int pipe[2] = { -1, -1 };
875 3efd8e31 2022-10-23 thomas if (client->packfile_path) {
876 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_PRIVSEP_MSG,
877 3efd8e31 2022-10-23 thomas "uid %d already has a pack file", client->euid);
880 3efd8e31 2022-10-23 thomas if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
881 3efd8e31 2022-10-23 thomas return got_error_from_errno("socketpair");
883 3efd8e31 2022-10-23 thomas memset(&ipipe, 0, sizeof(ipipe));
884 3efd8e31 2022-10-23 thomas ipipe.client_id = client->id;
886 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
887 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[0],
888 3efd8e31 2022-10-23 thomas &ipipe, sizeof(ipipe)) == -1) {
889 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
890 3efd8e31 2022-10-23 thomas pipe[0] = -1;
891 3efd8e31 2022-10-23 thomas goto done;
893 3efd8e31 2022-10-23 thomas pipe[0] = -1;
895 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
896 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1],
897 3efd8e31 2022-10-23 thomas &ipipe, sizeof(ipipe)) == -1)
898 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
899 3efd8e31 2022-10-23 thomas pipe[1] = -1;
901 3efd8e31 2022-10-23 thomas if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.pack",
902 3efd8e31 2022-10-23 thomas client->repo_write->chroot_path, GOT_OBJECTS_PACK_DIR,
903 3efd8e31 2022-10-23 thomas client->euid) == -1) {
904 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
905 3efd8e31 2022-10-23 thomas goto done;
908 3efd8e31 2022-10-23 thomas err = got_opentemp_named_fd(&pack_path, &packfd, basepath);
910 3efd8e31 2022-10-23 thomas goto done;
912 3efd8e31 2022-10-23 thomas free(basepath);
913 3efd8e31 2022-10-23 thomas if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.idx",
914 3efd8e31 2022-10-23 thomas client->repo_write->chroot_path, GOT_OBJECTS_PACK_DIR,
915 3efd8e31 2022-10-23 thomas client->euid) == -1) {
916 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
917 3efd8e31 2022-10-23 thomas basepath = NULL;
918 3efd8e31 2022-10-23 thomas goto done;
920 3efd8e31 2022-10-23 thomas err = got_opentemp_named_fd(&idx_path, &idxfd, basepath);
922 3efd8e31 2022-10-23 thomas goto done;
924 3efd8e31 2022-10-23 thomas memset(&ifile, 0, sizeof(ifile));
925 3efd8e31 2022-10-23 thomas ifile.client_id = client->id;
926 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
927 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKIDX_FILE, PROC_GOTD, idxfd,
928 3efd8e31 2022-10-23 thomas &ifile, sizeof(ifile)) == -1) {
929 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKIDX_FILE");
930 3efd8e31 2022-10-23 thomas idxfd = -1;
931 3efd8e31 2022-10-23 thomas goto done;
933 3efd8e31 2022-10-23 thomas idxfd = -1;
935 3efd8e31 2022-10-23 thomas memset(&ipack, 0, sizeof(ipack));
936 3efd8e31 2022-10-23 thomas ipack.client_id = client->id;
937 3efd8e31 2022-10-23 thomas if (client_has_capability(client, GOT_CAPA_REPORT_STATUS))
938 3efd8e31 2022-10-23 thomas ipack.report_status = 1;
940 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
941 3efd8e31 2022-10-23 thomas GOTD_IMSG_RECV_PACKFILE, PROC_GOTD, packfd,
942 3efd8e31 2022-10-23 thomas &ipack, sizeof(ipack)) == -1) {
943 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose RECV_PACKFILE");
944 3efd8e31 2022-10-23 thomas packfd = -1;
945 3efd8e31 2022-10-23 thomas goto done;
947 3efd8e31 2022-10-23 thomas packfd = -1;
950 3efd8e31 2022-10-23 thomas free(basepath);
951 3efd8e31 2022-10-23 thomas if (pipe[0] != -1 && close(pipe[0]) == -1 && err == NULL)
952 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
953 3efd8e31 2022-10-23 thomas if (pipe[1] != -1 && close(pipe[1]) == -1 && err == NULL)
954 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
955 3efd8e31 2022-10-23 thomas if (packfd != -1 && close(packfd) == -1 && err == NULL)
956 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
957 3efd8e31 2022-10-23 thomas if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
958 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
959 3efd8e31 2022-10-23 thomas if (err) {
960 3efd8e31 2022-10-23 thomas free(pack_path);
961 3efd8e31 2022-10-23 thomas free(idx_path);
963 3efd8e31 2022-10-23 thomas client->packfile_path = pack_path;
964 3efd8e31 2022-10-23 thomas client->packidx_path = idx_path;
966 3efd8e31 2022-10-23 thomas return err;
969 3efd8e31 2022-10-23 thomas static void
970 3efd8e31 2022-10-23 thomas gotd_request(int fd, short events, void *arg)
972 3efd8e31 2022-10-23 thomas struct gotd_imsgev *iev = arg;
973 3efd8e31 2022-10-23 thomas struct imsgbuf *ibuf = &iev->ibuf;
974 3efd8e31 2022-10-23 thomas struct gotd_client *client = iev->handler_arg;
975 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
976 3efd8e31 2022-10-23 thomas struct imsg imsg;
977 3efd8e31 2022-10-23 thomas ssize_t n;
979 3efd8e31 2022-10-23 thomas if (events & EV_WRITE) {
980 3efd8e31 2022-10-23 thomas while (ibuf->w.queued) {
981 3efd8e31 2022-10-23 thomas n = msgbuf_write(&ibuf->w);
982 3efd8e31 2022-10-23 thomas if (n == -1 && errno == EPIPE) {
984 3efd8e31 2022-10-23 thomas * The client has closed its socket.
985 3efd8e31 2022-10-23 thomas * This can happen when Git clients are
986 3efd8e31 2022-10-23 thomas * done sending pack file data.
988 3efd8e31 2022-10-23 thomas msgbuf_clear(&ibuf->w);
989 3efd8e31 2022-10-23 thomas continue;
990 3efd8e31 2022-10-23 thomas } else if (n == -1 && errno != EAGAIN) {
991 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg_flush");
992 3efd8e31 2022-10-23 thomas disconnect_on_error(client, err);
995 3efd8e31 2022-10-23 thomas if (n == 0) {
996 3efd8e31 2022-10-23 thomas /* Connection closed. */
997 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_EOF);
998 3efd8e31 2022-10-23 thomas disconnect_on_error(client, err);
1003 c902213d 2022-10-29 thomas /* Disconnect gotctl(8) now that messages have been sent. */
1004 c902213d 2022-10-29 thomas if (!client_is_reading(client) && !client_is_writing(client)) {
1005 c902213d 2022-10-29 thomas disconnect(client);
1010 3efd8e31 2022-10-23 thomas if ((events & EV_READ) == 0)
1013 3efd8e31 2022-10-23 thomas memset(&imsg, 0, sizeof(imsg));
1015 3efd8e31 2022-10-23 thomas while (err == NULL) {
1016 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv(&imsg, ibuf, 0);
1017 3efd8e31 2022-10-23 thomas if (err) {
1018 3efd8e31 2022-10-23 thomas if (err->code == GOT_ERR_PRIVSEP_READ)
1019 3efd8e31 2022-10-23 thomas err = NULL;
1023 3efd8e31 2022-10-23 thomas evtimer_del(&client->tmo);
1025 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
1026 c902213d 2022-10-29 thomas case GOTD_IMSG_INFO:
1027 c902213d 2022-10-29 thomas err = send_info(client);
1029 c902213d 2022-10-29 thomas case GOTD_IMSG_STOP:
1030 c902213d 2022-10-29 thomas err = stop_gotd(client);
1032 3efd8e31 2022-10-23 thomas case GOTD_IMSG_LIST_REFS:
1033 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_LIST_REFS) {
1034 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1035 3efd8e31 2022-10-23 thomas "unexpected list-refs request received");
1038 3efd8e31 2022-10-23 thomas err = forward_list_refs_request(client, &imsg);
1039 3efd8e31 2022-10-23 thomas if (err)
1041 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_CAPABILITIES;
1042 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting capabilities",
1043 3efd8e31 2022-10-23 thomas client->euid);
1045 3efd8e31 2022-10-23 thomas case GOTD_IMSG_CAPABILITIES:
1046 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1047 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1048 3efd8e31 2022-10-23 thomas "unexpected capabilities received");
1051 3efd8e31 2022-10-23 thomas log_debug("receiving capabilities from uid %d",
1052 3efd8e31 2022-10-23 thomas client->euid);
1053 3efd8e31 2022-10-23 thomas err = recv_capabilities(client, &imsg);
1055 3efd8e31 2022-10-23 thomas case GOTD_IMSG_CAPABILITY:
1056 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1057 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1058 3efd8e31 2022-10-23 thomas "unexpected capability received");
1061 3efd8e31 2022-10-23 thomas err = recv_capability(client, &imsg);
1062 3efd8e31 2022-10-23 thomas if (err || client->ncapabilities < client->ncapa_alloc)
1064 3efd8e31 2022-10-23 thomas if (client_is_reading(client)) {
1065 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_WANT;
1066 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting want-lines",
1067 3efd8e31 2022-10-23 thomas client->euid);
1068 3efd8e31 2022-10-23 thomas } else if (client_is_writing(client)) {
1069 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_REF_UPDATE;
1070 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting ref-update-lines",
1071 3efd8e31 2022-10-23 thomas client->euid);
1073 3efd8e31 2022-10-23 thomas fatalx("client %d is both reading and writing",
1074 3efd8e31 2022-10-23 thomas client->euid);
1076 3efd8e31 2022-10-23 thomas case GOTD_IMSG_WANT:
1077 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_WANT) {
1078 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1079 3efd8e31 2022-10-23 thomas "unexpected want-line received");
1082 3efd8e31 2022-10-23 thomas log_debug("received want-line from uid %d",
1083 3efd8e31 2022-10-23 thomas client->euid);
1084 3efd8e31 2022-10-23 thomas err = ensure_client_is_reading(client);
1085 3efd8e31 2022-10-23 thomas if (err)
1087 3efd8e31 2022-10-23 thomas err = forward_want(client, &imsg);
1089 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATE:
1090 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_REF_UPDATE) {
1091 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1092 3efd8e31 2022-10-23 thomas "unexpected ref-update-line received");
1095 3efd8e31 2022-10-23 thomas log_debug("received ref-update-line from uid %d",
1096 3efd8e31 2022-10-23 thomas client->euid);
1097 3efd8e31 2022-10-23 thomas err = ensure_client_is_writing(client);
1098 3efd8e31 2022-10-23 thomas if (err)
1100 3efd8e31 2022-10-23 thomas err = forward_ref_update(client, &imsg);
1101 3efd8e31 2022-10-23 thomas if (err)
1103 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_MORE_REF_UPDATES;
1105 3efd8e31 2022-10-23 thomas case GOTD_IMSG_HAVE:
1106 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_HAVE) {
1107 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1108 3efd8e31 2022-10-23 thomas "unexpected have-line received");
1111 3efd8e31 2022-10-23 thomas log_debug("received have-line from uid %d",
1112 3efd8e31 2022-10-23 thomas client->euid);
1113 3efd8e31 2022-10-23 thomas err = ensure_client_is_reading(client);
1114 3efd8e31 2022-10-23 thomas if (err)
1116 3efd8e31 2022-10-23 thomas err = forward_have(client, &imsg);
1117 3efd8e31 2022-10-23 thomas if (err)
1120 3efd8e31 2022-10-23 thomas case GOTD_IMSG_FLUSH:
1121 3efd8e31 2022-10-23 thomas if (client->state == GOTD_STATE_EXPECT_WANT ||
1122 3efd8e31 2022-10-23 thomas client->state == GOTD_STATE_EXPECT_HAVE) {
1123 3efd8e31 2022-10-23 thomas err = ensure_client_is_reading(client);
1124 3efd8e31 2022-10-23 thomas if (err)
1126 3efd8e31 2022-10-23 thomas } else if (client->state ==
1127 3efd8e31 2022-10-23 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1128 3efd8e31 2022-10-23 thomas err = ensure_client_is_writing(client);
1129 3efd8e31 2022-10-23 thomas if (err)
1131 3efd8e31 2022-10-23 thomas } else {
1132 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1133 3efd8e31 2022-10-23 thomas "unexpected flush-pkt received");
1136 3efd8e31 2022-10-23 thomas log_debug("received flush-pkt from uid %d",
1137 3efd8e31 2022-10-23 thomas client->euid);
1138 3efd8e31 2022-10-23 thomas if (client->state == GOTD_STATE_EXPECT_WANT) {
1139 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_HAVE;
1140 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting have-lines",
1141 3efd8e31 2022-10-23 thomas client->euid);
1142 3efd8e31 2022-10-23 thomas } else if (client->state == GOTD_STATE_EXPECT_HAVE) {
1143 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_DONE;
1144 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting 'done'",
1145 3efd8e31 2022-10-23 thomas client->euid);
1146 3efd8e31 2022-10-23 thomas } else if (client->state ==
1147 3efd8e31 2022-10-23 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1148 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_PACKFILE;
1149 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting packfile",
1150 3efd8e31 2022-10-23 thomas client->euid);
1151 3efd8e31 2022-10-23 thomas err = recv_packfile(client);
1152 3efd8e31 2022-10-23 thomas } else {
1153 3efd8e31 2022-10-23 thomas /* should not happen, see above */
1154 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1155 3efd8e31 2022-10-23 thomas "unexpected client state");
1159 3efd8e31 2022-10-23 thomas case GOTD_IMSG_DONE:
1160 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_HAVE &&
1161 3efd8e31 2022-10-23 thomas client->state != GOTD_STATE_EXPECT_DONE) {
1162 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1163 3efd8e31 2022-10-23 thomas "unexpected flush-pkt received");
1166 3efd8e31 2022-10-23 thomas log_debug("received 'done' from uid %d", client->euid);
1167 3efd8e31 2022-10-23 thomas err = ensure_client_is_reading(client);
1168 3efd8e31 2022-10-23 thomas if (err)
1170 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_DONE;
1171 3efd8e31 2022-10-23 thomas err = send_packfile(client);
1173 3efd8e31 2022-10-23 thomas default:
1174 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
1178 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1181 3efd8e31 2022-10-23 thomas if (err) {
1182 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_EOF ||
1183 3efd8e31 2022-10-23 thomas client->state != GOTD_STATE_EXPECT_PACKFILE)
1184 3efd8e31 2022-10-23 thomas disconnect_on_error(client, err);
1185 3efd8e31 2022-10-23 thomas } else {
1186 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(&client->iev);
1187 3efd8e31 2022-10-23 thomas evtimer_add(&client->tmo, &timeout);
1191 3efd8e31 2022-10-23 thomas static void
1192 3efd8e31 2022-10-23 thomas gotd_request_timeout(int fd, short events, void *arg)
1194 3efd8e31 2022-10-23 thomas struct gotd_client *client = arg;
1196 3efd8e31 2022-10-23 thomas log_debug("disconnecting uid %d due to timeout", client->euid);
1197 3efd8e31 2022-10-23 thomas disconnect(client);
1200 3efd8e31 2022-10-23 thomas static void
1201 3efd8e31 2022-10-23 thomas gotd_accept(int fd, short event, void *arg)
1203 3efd8e31 2022-10-23 thomas struct sockaddr_storage ss;
1204 3efd8e31 2022-10-23 thomas struct timeval backoff;
1205 3efd8e31 2022-10-23 thomas socklen_t len;
1206 3efd8e31 2022-10-23 thomas int s = -1;
1207 3efd8e31 2022-10-23 thomas struct gotd_client *client = NULL;
1208 3efd8e31 2022-10-23 thomas uid_t euid;
1209 3efd8e31 2022-10-23 thomas gid_t egid;
1211 3efd8e31 2022-10-23 thomas backoff.tv_sec = 1;
1212 3efd8e31 2022-10-23 thomas backoff.tv_usec = 0;
1214 3efd8e31 2022-10-23 thomas if (event_add(&gotd.ev, NULL) == -1) {
1215 3efd8e31 2022-10-23 thomas log_warn("event_add");
1218 3efd8e31 2022-10-23 thomas if (event & EV_TIMEOUT)
1221 3efd8e31 2022-10-23 thomas len = sizeof(ss);
1223 3efd8e31 2022-10-23 thomas s = accept_reserve(fd, (struct sockaddr *)&ss, &len, GOTD_FD_RESERVE,
1224 3efd8e31 2022-10-23 thomas &inflight);
1226 3efd8e31 2022-10-23 thomas if (s == -1) {
1227 3efd8e31 2022-10-23 thomas switch (errno) {
1228 3efd8e31 2022-10-23 thomas case EINTR:
1229 3efd8e31 2022-10-23 thomas case EWOULDBLOCK:
1230 3efd8e31 2022-10-23 thomas case ECONNABORTED:
1232 3efd8e31 2022-10-23 thomas case EMFILE:
1233 3efd8e31 2022-10-23 thomas case ENFILE:
1234 3efd8e31 2022-10-23 thomas event_del(&gotd.ev);
1235 3efd8e31 2022-10-23 thomas evtimer_add(&gotd.pause, &backoff);
1237 3efd8e31 2022-10-23 thomas default:
1238 3efd8e31 2022-10-23 thomas log_warn("%s: accept", __func__);
1243 3efd8e31 2022-10-23 thomas if (client_cnt >= GOTD_MAXCLIENTS)
1244 3efd8e31 2022-10-23 thomas goto err;
1246 3efd8e31 2022-10-23 thomas if (getpeereid(s, &euid, &egid) == -1) {
1247 3efd8e31 2022-10-23 thomas log_warn("%s: getpeereid", __func__);
1248 3efd8e31 2022-10-23 thomas goto err;
1251 3efd8e31 2022-10-23 thomas client = calloc(1, sizeof(*client));
1252 3efd8e31 2022-10-23 thomas if (client == NULL) {
1253 3efd8e31 2022-10-23 thomas log_warn("%s: calloc", __func__);
1254 3efd8e31 2022-10-23 thomas goto err;
1257 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_LIST_REFS;
1258 3efd8e31 2022-10-23 thomas client->id = get_client_id();
1259 3efd8e31 2022-10-23 thomas client->fd = s;
1261 3efd8e31 2022-10-23 thomas client->delta_cache_fd = -1;
1262 3efd8e31 2022-10-23 thomas client->euid = euid;
1263 3efd8e31 2022-10-23 thomas client->egid = egid;
1264 3efd8e31 2022-10-23 thomas client->nref_updates = -1;
1266 3efd8e31 2022-10-23 thomas imsg_init(&client->iev.ibuf, client->fd);
1267 3efd8e31 2022-10-23 thomas client->iev.handler = gotd_request;
1268 3efd8e31 2022-10-23 thomas client->iev.events = EV_READ;
1269 3efd8e31 2022-10-23 thomas client->iev.handler_arg = client;
1271 3efd8e31 2022-10-23 thomas event_set(&client->iev.ev, client->fd, EV_READ, gotd_request,
1272 3efd8e31 2022-10-23 thomas &client->iev);
1273 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(&client->iev);
1275 3efd8e31 2022-10-23 thomas evtimer_set(&client->tmo, gotd_request_timeout, client);
1277 3efd8e31 2022-10-23 thomas add_client(client);
1278 3efd8e31 2022-10-23 thomas log_debug("%s: new client uid %d connected on fd %d", __func__,
1279 3efd8e31 2022-10-23 thomas client->euid, client->fd);
1282 3efd8e31 2022-10-23 thomas inflight--;
1283 3efd8e31 2022-10-23 thomas if (s != -1)
1284 3efd8e31 2022-10-23 thomas close(s);
1285 3efd8e31 2022-10-23 thomas free(client);
1288 3efd8e31 2022-10-23 thomas static void
1289 3efd8e31 2022-10-23 thomas gotd_accept_paused(int fd, short event, void *arg)
1291 3efd8e31 2022-10-23 thomas event_add(&gotd.ev, NULL);
1294 3efd8e31 2022-10-23 thomas static const char *gotd_proc_names[PROC_MAX] = {
1295 3efd8e31 2022-10-23 thomas "parent",
1296 3efd8e31 2022-10-23 thomas "repo_read",
1297 3efd8e31 2022-10-23 thomas "repo_write"
1300 3efd8e31 2022-10-23 thomas static struct gotd_child_proc *
1301 3efd8e31 2022-10-23 thomas get_proc_for_pid(pid_t pid)
1303 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
1306 3efd8e31 2022-10-23 thomas for (i = 0; i < gotd.nprocs; i++) {
1307 3efd8e31 2022-10-23 thomas proc = &gotd.procs[i];
1308 3efd8e31 2022-10-23 thomas if (proc->pid == pid)
1309 3efd8e31 2022-10-23 thomas return proc;
1312 3efd8e31 2022-10-23 thomas return NULL;
1315 3efd8e31 2022-10-23 thomas static void
1316 3efd8e31 2022-10-23 thomas kill_proc(struct gotd_child_proc *proc, int fatal)
1318 3efd8e31 2022-10-23 thomas if (fatal) {
1319 3efd8e31 2022-10-23 thomas log_warnx("sending SIGKILL to PID %d", proc->pid);
1320 3efd8e31 2022-10-23 thomas kill(proc->pid, SIGKILL);
1322 3efd8e31 2022-10-23 thomas kill(proc->pid, SIGTERM);
1325 3efd8e31 2022-10-23 thomas static void
1326 3efd8e31 2022-10-23 thomas gotd_shutdown(void)
1328 3efd8e31 2022-10-23 thomas pid_t pid;
1329 3efd8e31 2022-10-23 thomas int status, i;
1330 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
1332 3efd8e31 2022-10-23 thomas for (i = 0; i < gotd.nprocs; i++) {
1333 3efd8e31 2022-10-23 thomas proc = &gotd.procs[i];
1334 3efd8e31 2022-10-23 thomas msgbuf_clear(&proc->iev.ibuf.w);
1335 3efd8e31 2022-10-23 thomas close(proc->iev.ibuf.fd);
1336 3efd8e31 2022-10-23 thomas kill_proc(proc, 0);
1339 3efd8e31 2022-10-23 thomas log_debug("waiting for children to terminate");
1341 3efd8e31 2022-10-23 thomas pid = wait(&status);
1342 3efd8e31 2022-10-23 thomas if (pid == -1) {
1343 3efd8e31 2022-10-23 thomas if (errno != EINTR && errno != ECHILD)
1344 3efd8e31 2022-10-23 thomas fatal("wait");
1345 3efd8e31 2022-10-23 thomas } else if (WIFSIGNALED(status)) {
1346 3efd8e31 2022-10-23 thomas proc = get_proc_for_pid(pid);
1347 3efd8e31 2022-10-23 thomas log_warnx("%s %s child process terminated; signal %d",
1348 3efd8e31 2022-10-23 thomas proc ? gotd_proc_names[proc->type] : "",
1349 3efd8e31 2022-10-23 thomas proc ? proc->chroot_path : "", WTERMSIG(status));
1351 3efd8e31 2022-10-23 thomas } while (pid != -1 || (pid == -1 && errno == EINTR));
1353 3efd8e31 2022-10-23 thomas log_info("terminating");
1354 3efd8e31 2022-10-23 thomas exit(0);
1358 3efd8e31 2022-10-23 thomas gotd_sighdlr(int sig, short event, void *arg)
1361 3efd8e31 2022-10-23 thomas * Normal signal handler rules don't apply because libevent
1362 3efd8e31 2022-10-23 thomas * decouples for us.
1365 3efd8e31 2022-10-23 thomas switch (sig) {
1366 3efd8e31 2022-10-23 thomas case SIGHUP:
1367 3efd8e31 2022-10-23 thomas log_info("%s: ignoring SIGHUP", __func__);
1369 3efd8e31 2022-10-23 thomas case SIGUSR1:
1370 3efd8e31 2022-10-23 thomas log_info("%s: ignoring SIGUSR1", __func__);
1372 3efd8e31 2022-10-23 thomas case SIGTERM:
1373 3efd8e31 2022-10-23 thomas case SIGINT:
1374 3efd8e31 2022-10-23 thomas gotd_shutdown();
1375 3efd8e31 2022-10-23 thomas log_warnx("gotd terminating");
1376 3efd8e31 2022-10-23 thomas exit(0);
1378 3efd8e31 2022-10-23 thomas default:
1379 3efd8e31 2022-10-23 thomas fatalx("unexpected signal");
1383 3efd8e31 2022-10-23 thomas static const struct got_error *
1384 3efd8e31 2022-10-23 thomas ensure_proc_is_reading(struct gotd_client *client,
1385 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc)
1387 3efd8e31 2022-10-23 thomas if (!client_is_reading(client)) {
1388 3efd8e31 2022-10-23 thomas kill_proc(proc, 1);
1389 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
1390 3efd8e31 2022-10-23 thomas "PID %d handled a read-request for uid %d but this "
1391 3efd8e31 2022-10-23 thomas "user is not reading from a repository", proc->pid,
1392 3efd8e31 2022-10-23 thomas client->euid);
1395 3efd8e31 2022-10-23 thomas return NULL;
1398 3efd8e31 2022-10-23 thomas static const struct got_error *
1399 3efd8e31 2022-10-23 thomas ensure_proc_is_writing(struct gotd_client *client,
1400 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc)
1402 3efd8e31 2022-10-23 thomas if (!client_is_writing(client)) {
1403 3efd8e31 2022-10-23 thomas kill_proc(proc, 1);
1404 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
1405 3efd8e31 2022-10-23 thomas "PID %d handled a write-request for uid %d but this "
1406 3efd8e31 2022-10-23 thomas "user is not writing to a repository", proc->pid,
1407 3efd8e31 2022-10-23 thomas client->euid);
1410 3efd8e31 2022-10-23 thomas return NULL;
1413 3efd8e31 2022-10-23 thomas static int
1414 3efd8e31 2022-10-23 thomas verify_imsg_src(struct gotd_client *client, struct gotd_child_proc *proc,
1415 3efd8e31 2022-10-23 thomas struct imsg *imsg)
1417 3efd8e31 2022-10-23 thomas const struct got_error *err;
1418 3efd8e31 2022-10-23 thomas struct gotd_child_proc *client_proc;
1419 3efd8e31 2022-10-23 thomas int ret = 0;
1421 3efd8e31 2022-10-23 thomas client_proc = get_client_proc(client);
1422 c902213d 2022-10-29 thomas if (client_proc == NULL)
1423 c902213d 2022-10-29 thomas fatalx("no process found for uid %d", client->euid);
1425 3efd8e31 2022-10-23 thomas if (proc->pid != client_proc->pid) {
1426 3efd8e31 2022-10-23 thomas kill_proc(proc, 1);
1427 3efd8e31 2022-10-23 thomas log_warnx("received message from PID %d for uid %d, while "
1428 3efd8e31 2022-10-23 thomas "PID %d is the process serving this user",
1429 3efd8e31 2022-10-23 thomas proc->pid, client->euid, client_proc->pid);
1430 3efd8e31 2022-10-23 thomas return 0;
1433 3efd8e31 2022-10-23 thomas switch (imsg->hdr.type) {
1434 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
1435 3efd8e31 2022-10-23 thomas ret = 1;
1437 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_DONE:
1438 3efd8e31 2022-10-23 thomas err = ensure_proc_is_reading(client, proc);
1439 3efd8e31 2022-10-23 thomas if (err)
1440 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1442 3efd8e31 2022-10-23 thomas ret = 1;
1444 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_INSTALL:
1445 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATES_START:
1446 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATE:
1447 3efd8e31 2022-10-23 thomas err = ensure_proc_is_writing(client, proc);
1448 3efd8e31 2022-10-23 thomas if (err)
1449 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1451 3efd8e31 2022-10-23 thomas ret = 1;
1453 3efd8e31 2022-10-23 thomas default:
1454 3efd8e31 2022-10-23 thomas log_debug("%s: unexpected imsg %d", __func__, imsg->hdr.type);
1458 3efd8e31 2022-10-23 thomas return ret;
1461 3efd8e31 2022-10-23 thomas static const struct got_error *
1462 3efd8e31 2022-10-23 thomas recv_packfile_done(uint32_t *client_id, struct imsg *imsg)
1464 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_done idone;
1465 3efd8e31 2022-10-23 thomas size_t datalen;
1467 3efd8e31 2022-10-23 thomas log_debug("packfile-done received");
1469 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1470 3efd8e31 2022-10-23 thomas if (datalen != sizeof(idone))
1471 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1472 3efd8e31 2022-10-23 thomas memcpy(&idone, imsg->data, sizeof(idone));
1474 3efd8e31 2022-10-23 thomas *client_id = idone.client_id;
1475 3efd8e31 2022-10-23 thomas return NULL;
1478 3efd8e31 2022-10-23 thomas static const struct got_error *
1479 3efd8e31 2022-10-23 thomas recv_packfile_install(uint32_t *client_id, struct imsg *imsg)
1481 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_install inst;
1482 3efd8e31 2022-10-23 thomas size_t datalen;
1484 3efd8e31 2022-10-23 thomas log_debug("packfile-install received");
1486 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1487 3efd8e31 2022-10-23 thomas if (datalen != sizeof(inst))
1488 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1489 3efd8e31 2022-10-23 thomas memcpy(&inst, imsg->data, sizeof(inst));
1491 3efd8e31 2022-10-23 thomas *client_id = inst.client_id;
1492 3efd8e31 2022-10-23 thomas return NULL;
1495 3efd8e31 2022-10-23 thomas static const struct got_error *
1496 3efd8e31 2022-10-23 thomas recv_ref_updates_start(uint32_t *client_id, struct imsg *imsg)
1498 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_updates_start istart;
1499 3efd8e31 2022-10-23 thomas size_t datalen;
1501 3efd8e31 2022-10-23 thomas log_debug("ref-updates-start received");
1503 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1504 3efd8e31 2022-10-23 thomas if (datalen != sizeof(istart))
1505 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1506 3efd8e31 2022-10-23 thomas memcpy(&istart, imsg->data, sizeof(istart));
1508 3efd8e31 2022-10-23 thomas *client_id = istart.client_id;
1509 3efd8e31 2022-10-23 thomas return NULL;
1512 3efd8e31 2022-10-23 thomas static const struct got_error *
1513 3efd8e31 2022-10-23 thomas recv_ref_update(uint32_t *client_id, struct imsg *imsg)
1515 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update iref;
1516 3efd8e31 2022-10-23 thomas size_t datalen;
1518 3efd8e31 2022-10-23 thomas log_debug("ref-update received");
1520 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1521 3efd8e31 2022-10-23 thomas if (datalen < sizeof(iref))
1522 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1523 3efd8e31 2022-10-23 thomas memcpy(&iref, imsg->data, sizeof(iref));
1525 3efd8e31 2022-10-23 thomas *client_id = iref.client_id;
1526 3efd8e31 2022-10-23 thomas return NULL;
1529 3efd8e31 2022-10-23 thomas static const struct got_error *
1530 3efd8e31 2022-10-23 thomas send_ref_update_ok(struct gotd_client *client,
1531 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update *iref, const char *refname)
1533 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update_ok iok;
1534 3efd8e31 2022-10-23 thomas struct ibuf *wbuf;
1535 3efd8e31 2022-10-23 thomas size_t len;
1537 3efd8e31 2022-10-23 thomas memset(&iok, 0, sizeof(iok));
1538 3efd8e31 2022-10-23 thomas iok.client_id = client->id;
1539 3efd8e31 2022-10-23 thomas memcpy(iok.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
1540 3efd8e31 2022-10-23 thomas memcpy(iok.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
1541 3efd8e31 2022-10-23 thomas iok.name_len = strlen(refname);
1543 3efd8e31 2022-10-23 thomas len = sizeof(iok) + iok.name_len;
1544 3efd8e31 2022-10-23 thomas wbuf = imsg_create(&client->iev.ibuf, GOTD_IMSG_REF_UPDATE_OK,
1545 3efd8e31 2022-10-23 thomas PROC_GOTD, gotd.pid, len);
1546 3efd8e31 2022-10-23 thomas if (wbuf == NULL)
1547 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_create REF_UPDATE_OK");
1549 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, &iok, sizeof(iok)) == -1)
1550 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_OK");
1551 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, refname, iok.name_len) == -1)
1552 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_OK");
1554 3efd8e31 2022-10-23 thomas wbuf->fd = -1;
1555 3efd8e31 2022-10-23 thomas imsg_close(&client->iev.ibuf, wbuf);
1556 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(&client->iev);
1557 3efd8e31 2022-10-23 thomas return NULL;
1560 3efd8e31 2022-10-23 thomas static void
1561 3efd8e31 2022-10-23 thomas send_refs_updated(struct gotd_client *client)
1563 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->iev,
1564 3efd8e31 2022-10-23 thomas GOTD_IMSG_REFS_UPDATED, PROC_GOTD, -1, NULL, 0) == -1)
1565 3efd8e31 2022-10-23 thomas log_warn("imsg compose REFS_UPDATED");
1568 3efd8e31 2022-10-23 thomas static const struct got_error *
1569 3efd8e31 2022-10-23 thomas send_ref_update_ng(struct gotd_client *client,
1570 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update *iref, const char *refname,
1571 3efd8e31 2022-10-23 thomas const char *reason)
1573 3efd8e31 2022-10-23 thomas const struct got_error *ng_err;
1574 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update_ng ing;
1575 3efd8e31 2022-10-23 thomas struct ibuf *wbuf;
1576 3efd8e31 2022-10-23 thomas size_t len;
1578 3efd8e31 2022-10-23 thomas memset(&ing, 0, sizeof(ing));
1579 3efd8e31 2022-10-23 thomas ing.client_id = client->id;
1580 3efd8e31 2022-10-23 thomas memcpy(ing.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
1581 3efd8e31 2022-10-23 thomas memcpy(ing.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
1582 3efd8e31 2022-10-23 thomas ing.name_len = strlen(refname);
1584 3efd8e31 2022-10-23 thomas ng_err = got_error_fmt(GOT_ERR_REF_BUSY, "%s", reason);
1585 3efd8e31 2022-10-23 thomas ing.reason_len = strlen(ng_err->msg);
1587 3efd8e31 2022-10-23 thomas len = sizeof(ing) + ing.name_len + ing.reason_len;
1588 3efd8e31 2022-10-23 thomas wbuf = imsg_create(&client->iev.ibuf, GOTD_IMSG_REF_UPDATE_NG,
1589 3efd8e31 2022-10-23 thomas PROC_GOTD, gotd.pid, len);
1590 3efd8e31 2022-10-23 thomas if (wbuf == NULL)
1591 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_create REF_UPDATE_NG");
1593 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, &ing, sizeof(ing)) == -1)
1594 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
1595 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, refname, ing.name_len) == -1)
1596 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
1597 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, ng_err->msg, ing.reason_len) == -1)
1598 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
1600 3efd8e31 2022-10-23 thomas wbuf->fd = -1;
1601 3efd8e31 2022-10-23 thomas imsg_close(&client->iev.ibuf, wbuf);
1602 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(&client->iev);
1603 3efd8e31 2022-10-23 thomas return NULL;
1606 3efd8e31 2022-10-23 thomas static const struct got_error *
1607 3efd8e31 2022-10-23 thomas install_pack(struct gotd_client *client, const char *repo_path,
1608 3efd8e31 2022-10-23 thomas struct imsg *imsg)
1610 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1611 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_install inst;
1612 3efd8e31 2022-10-23 thomas char hex[SHA1_DIGEST_STRING_LENGTH];
1613 3efd8e31 2022-10-23 thomas size_t datalen;
1614 3efd8e31 2022-10-23 thomas char *packfile_path = NULL, *packidx_path = NULL;
1616 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1617 3efd8e31 2022-10-23 thomas if (datalen != sizeof(inst))
1618 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1619 3efd8e31 2022-10-23 thomas memcpy(&inst, imsg->data, sizeof(inst));
1621 3efd8e31 2022-10-23 thomas if (client->packfile_path == NULL)
1622 3efd8e31 2022-10-23 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
1623 3efd8e31 2022-10-23 thomas "client has no pack file");
1624 3efd8e31 2022-10-23 thomas if (client->packidx_path == NULL)
1625 3efd8e31 2022-10-23 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
1626 3efd8e31 2022-10-23 thomas "client has no pack file index");
1628 3efd8e31 2022-10-23 thomas if (got_sha1_digest_to_str(inst.pack_sha1, hex, sizeof(hex)) == NULL)
1629 3efd8e31 2022-10-23 thomas return got_error_msg(GOT_ERR_NO_SPACE,
1630 3efd8e31 2022-10-23 thomas "could not convert pack file SHA1 to hex");
1632 3efd8e31 2022-10-23 thomas if (asprintf(&packfile_path, "/%s/%s/pack-%s.pack",
1633 3efd8e31 2022-10-23 thomas repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
1634 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
1635 3efd8e31 2022-10-23 thomas goto done;
1638 3efd8e31 2022-10-23 thomas if (asprintf(&packidx_path, "/%s/%s/pack-%s.idx",
1639 3efd8e31 2022-10-23 thomas repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
1640 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
1641 3efd8e31 2022-10-23 thomas goto done;
1644 3efd8e31 2022-10-23 thomas if (rename(client->packfile_path, packfile_path) == -1) {
1645 3efd8e31 2022-10-23 thomas err = got_error_from_errno3("rename", client->packfile_path,
1646 3efd8e31 2022-10-23 thomas packfile_path);
1647 3efd8e31 2022-10-23 thomas goto done;
1650 3efd8e31 2022-10-23 thomas free(client->packfile_path);
1651 3efd8e31 2022-10-23 thomas client->packfile_path = NULL;
1653 3efd8e31 2022-10-23 thomas if (rename(client->packidx_path, packidx_path) == -1) {
1654 3efd8e31 2022-10-23 thomas err = got_error_from_errno3("rename", client->packidx_path,
1655 3efd8e31 2022-10-23 thomas packidx_path);
1656 3efd8e31 2022-10-23 thomas goto done;
1659 3efd8e31 2022-10-23 thomas free(client->packidx_path);
1660 3efd8e31 2022-10-23 thomas client->packidx_path = NULL;
1662 3efd8e31 2022-10-23 thomas free(packfile_path);
1663 3efd8e31 2022-10-23 thomas free(packidx_path);
1664 3efd8e31 2022-10-23 thomas return err;
1667 3efd8e31 2022-10-23 thomas static const struct got_error *
1668 3efd8e31 2022-10-23 thomas begin_ref_updates(struct gotd_client *client, struct imsg *imsg)
1670 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_updates_start istart;
1671 3efd8e31 2022-10-23 thomas size_t datalen;
1673 3efd8e31 2022-10-23 thomas if (client->nref_updates != -1)
1674 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1676 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1677 3efd8e31 2022-10-23 thomas if (datalen != sizeof(istart))
1678 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1679 3efd8e31 2022-10-23 thomas memcpy(&istart, imsg->data, sizeof(istart));
1681 3efd8e31 2022-10-23 thomas if (istart.nref_updates <= 0)
1682 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1684 3efd8e31 2022-10-23 thomas client->nref_updates = istart.nref_updates;
1685 3efd8e31 2022-10-23 thomas return NULL;
1688 3efd8e31 2022-10-23 thomas static const struct got_error *
1689 3efd8e31 2022-10-23 thomas update_ref(struct gotd_client *client, const char *repo_path,
1690 3efd8e31 2022-10-23 thomas struct imsg *imsg)
1692 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1693 3efd8e31 2022-10-23 thomas struct got_repository *repo = NULL;
1694 3efd8e31 2022-10-23 thomas struct got_reference *ref = NULL;
1695 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update iref;
1696 3efd8e31 2022-10-23 thomas struct got_object_id old_id, new_id;
1697 3efd8e31 2022-10-23 thomas struct got_object_id *id = NULL;
1698 3efd8e31 2022-10-23 thomas struct got_object *obj = NULL;
1699 3efd8e31 2022-10-23 thomas char *refname = NULL;
1700 3efd8e31 2022-10-23 thomas size_t datalen;
1701 3efd8e31 2022-10-23 thomas int locked = 0;
1703 3efd8e31 2022-10-23 thomas log_debug("update-ref from uid %d", client->euid);
1705 3efd8e31 2022-10-23 thomas if (client->nref_updates <= 0)
1706 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1708 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1709 3efd8e31 2022-10-23 thomas if (datalen < sizeof(iref))
1710 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1711 3efd8e31 2022-10-23 thomas memcpy(&iref, imsg->data, sizeof(iref));
1712 3efd8e31 2022-10-23 thomas if (datalen != sizeof(iref) + iref.name_len)
1713 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1714 3efd8e31 2022-10-23 thomas refname = malloc(iref.name_len + 1);
1715 3efd8e31 2022-10-23 thomas if (refname == NULL)
1716 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
1717 3efd8e31 2022-10-23 thomas memcpy(refname, imsg->data + sizeof(iref), iref.name_len);
1718 3efd8e31 2022-10-23 thomas refname[iref.name_len] = '\0';
1720 3efd8e31 2022-10-23 thomas log_debug("updating ref %s for uid %d", refname, client->euid);
1722 3efd8e31 2022-10-23 thomas err = got_repo_open(&repo, repo_path, NULL, NULL);
1723 3efd8e31 2022-10-23 thomas if (err)
1724 3efd8e31 2022-10-23 thomas goto done;
1726 3efd8e31 2022-10-23 thomas memcpy(old_id.sha1, iref.old_id, SHA1_DIGEST_LENGTH);
1727 3efd8e31 2022-10-23 thomas memcpy(new_id.sha1, iref.new_id, SHA1_DIGEST_LENGTH);
1728 3efd8e31 2022-10-23 thomas err = got_object_open(&obj, repo, &new_id);
1729 3efd8e31 2022-10-23 thomas if (err)
1730 3efd8e31 2022-10-23 thomas goto done;
1732 3efd8e31 2022-10-23 thomas if (iref.ref_is_new) {
1733 3efd8e31 2022-10-23 thomas err = got_ref_open(&ref, repo, refname, 0);
1734 3efd8e31 2022-10-23 thomas if (err) {
1735 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_NOT_REF)
1736 3efd8e31 2022-10-23 thomas goto done;
1737 3efd8e31 2022-10-23 thomas err = got_ref_alloc(&ref, refname, &new_id);
1738 3efd8e31 2022-10-23 thomas if (err)
1739 3efd8e31 2022-10-23 thomas goto done;
1740 3efd8e31 2022-10-23 thomas err = got_ref_write(ref, repo); /* will lock/unlock */
1741 3efd8e31 2022-10-23 thomas if (err)
1742 3efd8e31 2022-10-23 thomas goto done;
1743 3efd8e31 2022-10-23 thomas } else {
1744 3efd8e31 2022-10-23 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
1745 3efd8e31 2022-10-23 thomas "%s has been created by someone else "
1746 3efd8e31 2022-10-23 thomas "while transaction was in progress",
1747 3efd8e31 2022-10-23 thomas got_ref_get_name(ref));
1748 3efd8e31 2022-10-23 thomas goto done;
1750 3efd8e31 2022-10-23 thomas } else {
1751 3efd8e31 2022-10-23 thomas err = got_ref_open(&ref, repo, refname, 1 /* lock */);
1752 3efd8e31 2022-10-23 thomas if (err)
1753 3efd8e31 2022-10-23 thomas goto done;
1754 3efd8e31 2022-10-23 thomas locked = 1;
1756 3efd8e31 2022-10-23 thomas err = got_ref_resolve(&id, repo, ref);
1757 3efd8e31 2022-10-23 thomas if (err)
1758 3efd8e31 2022-10-23 thomas goto done;
1760 3efd8e31 2022-10-23 thomas if (got_object_id_cmp(id, &old_id) != 0) {
1761 3efd8e31 2022-10-23 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
1762 3efd8e31 2022-10-23 thomas "%s has been modified by someone else "
1763 3efd8e31 2022-10-23 thomas "while transaction was in progress",
1764 3efd8e31 2022-10-23 thomas got_ref_get_name(ref));
1765 3efd8e31 2022-10-23 thomas goto done;
1768 3efd8e31 2022-10-23 thomas err = got_ref_change_ref(ref, &new_id);
1769 3efd8e31 2022-10-23 thomas if (err)
1770 3efd8e31 2022-10-23 thomas goto done;
1772 3efd8e31 2022-10-23 thomas err = got_ref_write(ref, repo);
1773 3efd8e31 2022-10-23 thomas if (err)
1774 3efd8e31 2022-10-23 thomas goto done;
1776 3efd8e31 2022-10-23 thomas free(id);
1777 3efd8e31 2022-10-23 thomas id = NULL;
1780 3efd8e31 2022-10-23 thomas if (err) {
1781 3efd8e31 2022-10-23 thomas if (err->code == GOT_ERR_LOCKFILE_TIMEOUT) {
1782 3efd8e31 2022-10-23 thomas err = got_error_fmt(GOT_ERR_LOCKFILE_TIMEOUT,
1783 3efd8e31 2022-10-23 thomas "could not acquire exclusive file lock for %s",
1784 3efd8e31 2022-10-23 thomas refname);
1786 3efd8e31 2022-10-23 thomas send_ref_update_ng(client, &iref, refname, err->msg);
1788 3efd8e31 2022-10-23 thomas send_ref_update_ok(client, &iref, refname);
1790 3efd8e31 2022-10-23 thomas if (client->nref_updates > 0) {
1791 3efd8e31 2022-10-23 thomas client->nref_updates--;
1792 3efd8e31 2022-10-23 thomas if (client->nref_updates == 0)
1793 3efd8e31 2022-10-23 thomas send_refs_updated(client);
1796 3efd8e31 2022-10-23 thomas if (locked) {
1797 3efd8e31 2022-10-23 thomas const struct got_error *unlock_err;
1798 3efd8e31 2022-10-23 thomas unlock_err = got_ref_unlock(ref);
1799 3efd8e31 2022-10-23 thomas if (unlock_err && err == NULL)
1800 3efd8e31 2022-10-23 thomas err = unlock_err;
1802 3efd8e31 2022-10-23 thomas if (ref)
1803 3efd8e31 2022-10-23 thomas got_ref_close(ref);
1804 3efd8e31 2022-10-23 thomas if (obj)
1805 3efd8e31 2022-10-23 thomas got_object_close(obj);
1806 3efd8e31 2022-10-23 thomas if (repo)
1807 3efd8e31 2022-10-23 thomas got_repo_close(repo);
1808 3efd8e31 2022-10-23 thomas free(refname);
1809 3efd8e31 2022-10-23 thomas free(id);
1810 3efd8e31 2022-10-23 thomas return err;
1813 3efd8e31 2022-10-23 thomas static void
1814 3efd8e31 2022-10-23 thomas gotd_dispatch(int fd, short event, void *arg)
1816 3efd8e31 2022-10-23 thomas struct gotd_imsgev *iev = arg;
1817 3efd8e31 2022-10-23 thomas struct imsgbuf *ibuf = &iev->ibuf;
1818 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc = NULL;
1819 3efd8e31 2022-10-23 thomas ssize_t n;
1820 3efd8e31 2022-10-23 thomas int shut = 0;
1821 3efd8e31 2022-10-23 thomas struct imsg imsg;
1823 3efd8e31 2022-10-23 thomas if (event & EV_READ) {
1824 3efd8e31 2022-10-23 thomas if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1825 3efd8e31 2022-10-23 thomas fatal("imsg_read error");
1826 3efd8e31 2022-10-23 thomas if (n == 0) {
1827 3efd8e31 2022-10-23 thomas /* Connection closed. */
1828 3efd8e31 2022-10-23 thomas shut = 1;
1829 3efd8e31 2022-10-23 thomas goto done;
1833 3efd8e31 2022-10-23 thomas if (event & EV_WRITE) {
1834 3efd8e31 2022-10-23 thomas n = msgbuf_write(&ibuf->w);
1835 3efd8e31 2022-10-23 thomas if (n == -1 && errno != EAGAIN)
1836 3efd8e31 2022-10-23 thomas fatal("msgbuf_write");
1837 3efd8e31 2022-10-23 thomas if (n == 0) {
1838 3efd8e31 2022-10-23 thomas /* Connection closed. */
1839 3efd8e31 2022-10-23 thomas shut = 1;
1840 3efd8e31 2022-10-23 thomas goto done;
1844 3efd8e31 2022-10-23 thomas proc = find_proc_by_fd(fd);
1845 3efd8e31 2022-10-23 thomas if (proc == NULL)
1846 3efd8e31 2022-10-23 thomas fatalx("cannot find child process for fd %d", fd);
1848 3efd8e31 2022-10-23 thomas for (;;) {
1849 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1850 3efd8e31 2022-10-23 thomas struct gotd_client *client = NULL;
1851 3efd8e31 2022-10-23 thomas uint32_t client_id = 0;
1852 3efd8e31 2022-10-23 thomas int do_disconnect = 0;
1853 3efd8e31 2022-10-23 thomas int do_ref_updates = 0, do_ref_update = 0;
1854 3efd8e31 2022-10-23 thomas int do_packfile_install = 0;
1856 3efd8e31 2022-10-23 thomas if ((n = imsg_get(ibuf, &imsg)) == -1)
1857 3efd8e31 2022-10-23 thomas fatal("%s: imsg_get error", __func__);
1858 3efd8e31 2022-10-23 thomas if (n == 0) /* No more messages. */
1861 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
1862 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
1863 3efd8e31 2022-10-23 thomas do_disconnect = 1;
1864 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(&client_id, &imsg);
1866 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_DONE:
1867 3efd8e31 2022-10-23 thomas do_disconnect = 1;
1868 3efd8e31 2022-10-23 thomas err = recv_packfile_done(&client_id, &imsg);
1870 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_INSTALL:
1871 3efd8e31 2022-10-23 thomas err = recv_packfile_install(&client_id, &imsg);
1872 3efd8e31 2022-10-23 thomas if (err == NULL)
1873 3efd8e31 2022-10-23 thomas do_packfile_install = 1;
1875 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATES_START:
1876 3efd8e31 2022-10-23 thomas err = recv_ref_updates_start(&client_id, &imsg);
1877 3efd8e31 2022-10-23 thomas if (err == NULL)
1878 3efd8e31 2022-10-23 thomas do_ref_updates = 1;
1880 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATE:
1881 3efd8e31 2022-10-23 thomas err = recv_ref_update(&client_id, &imsg);
1882 3efd8e31 2022-10-23 thomas if (err == NULL)
1883 3efd8e31 2022-10-23 thomas do_ref_update = 1;
1885 3efd8e31 2022-10-23 thomas default:
1886 3efd8e31 2022-10-23 thomas log_debug("unexpected imsg %d", imsg.hdr.type);
1890 3efd8e31 2022-10-23 thomas client = find_client(client_id);
1891 3efd8e31 2022-10-23 thomas if (client == NULL) {
1892 3efd8e31 2022-10-23 thomas log_warnx("%s: client not found", __func__);
1893 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1894 3efd8e31 2022-10-23 thomas continue;
1897 3efd8e31 2022-10-23 thomas if (!verify_imsg_src(client, proc, &imsg)) {
1898 3efd8e31 2022-10-23 thomas log_debug("dropping imsg type %d from PID %d",
1899 3efd8e31 2022-10-23 thomas imsg.hdr.type, proc->pid);
1900 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1901 3efd8e31 2022-10-23 thomas continue;
1903 3efd8e31 2022-10-23 thomas if (err)
1904 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1906 3efd8e31 2022-10-23 thomas if (do_disconnect) {
1907 3efd8e31 2022-10-23 thomas if (err)
1908 3efd8e31 2022-10-23 thomas disconnect_on_error(client, err);
1910 3efd8e31 2022-10-23 thomas disconnect(client);
1911 3efd8e31 2022-10-23 thomas } else if (do_packfile_install)
1912 3efd8e31 2022-10-23 thomas err = install_pack(client, proc->chroot_path, &imsg);
1913 3efd8e31 2022-10-23 thomas else if (do_ref_updates)
1914 3efd8e31 2022-10-23 thomas err = begin_ref_updates(client, &imsg);
1915 3efd8e31 2022-10-23 thomas else if (do_ref_update)
1916 3efd8e31 2022-10-23 thomas err = update_ref(client, proc->chroot_path, &imsg);
1918 3efd8e31 2022-10-23 thomas if (err)
1919 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1920 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1923 3efd8e31 2022-10-23 thomas if (!shut) {
1924 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(iev);
1925 3efd8e31 2022-10-23 thomas } else {
1926 3efd8e31 2022-10-23 thomas /* This pipe is dead. Remove its event handler */
1927 3efd8e31 2022-10-23 thomas event_del(&iev->ev);
1928 3efd8e31 2022-10-23 thomas event_loopexit(NULL);
1932 3efd8e31 2022-10-23 thomas static pid_t
1933 3efd8e31 2022-10-23 thomas start_child(enum gotd_procid proc_id, const char *chroot_path,
1934 3efd8e31 2022-10-23 thomas char *argv0, int fd, int daemonize, int verbosity)
1936 3efd8e31 2022-10-23 thomas char *argv[9];
1937 3efd8e31 2022-10-23 thomas int argc = 0;
1938 3efd8e31 2022-10-23 thomas pid_t pid;
1940 3efd8e31 2022-10-23 thomas switch (pid = fork()) {
1941 3efd8e31 2022-10-23 thomas case -1:
1942 3efd8e31 2022-10-23 thomas fatal("cannot fork");
1945 3efd8e31 2022-10-23 thomas default:
1946 3efd8e31 2022-10-23 thomas close(fd);
1947 3efd8e31 2022-10-23 thomas return pid;
1950 3efd8e31 2022-10-23 thomas if (fd != GOTD_SOCK_FILENO) {
1951 3efd8e31 2022-10-23 thomas if (dup2(fd, GOTD_SOCK_FILENO) == -1)
1952 3efd8e31 2022-10-23 thomas fatal("cannot setup imsg fd");
1953 3efd8e31 2022-10-23 thomas } else if (fcntl(fd, F_SETFD, 0) == -1)
1954 3efd8e31 2022-10-23 thomas fatal("cannot setup imsg fd");
1956 3efd8e31 2022-10-23 thomas argv[argc++] = argv0;
1957 3efd8e31 2022-10-23 thomas switch (proc_id) {
1958 3efd8e31 2022-10-23 thomas case PROC_REPO_READ:
1959 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-R";
1961 3efd8e31 2022-10-23 thomas case PROC_REPO_WRITE:
1962 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-W";
1964 3efd8e31 2022-10-23 thomas default:
1965 3efd8e31 2022-10-23 thomas fatalx("invalid process id %d", proc_id);
1968 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-P";
1969 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)chroot_path;
1971 3efd8e31 2022-10-23 thomas if (!daemonize)
1972 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-d";
1973 3efd8e31 2022-10-23 thomas if (verbosity > 0)
1974 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-v";
1975 3efd8e31 2022-10-23 thomas if (verbosity > 1)
1976 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-v";
1977 3efd8e31 2022-10-23 thomas argv[argc++] = NULL;
1979 3efd8e31 2022-10-23 thomas execvp(argv0, argv);
1980 3efd8e31 2022-10-23 thomas fatal("execvp");
1983 3efd8e31 2022-10-23 thomas static void
1984 3efd8e31 2022-10-23 thomas start_repo_children(struct gotd *gotd, char *argv0, int daemonize,
1985 3efd8e31 2022-10-23 thomas int verbosity)
1987 3efd8e31 2022-10-23 thomas struct gotd_repo *repo = NULL;
1988 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
1992 3efd8e31 2022-10-23 thomas * XXX For now, use one reader and one writer per repository.
1993 3efd8e31 2022-10-23 thomas * This should be changed to N readers + M writers.
1995 3efd8e31 2022-10-23 thomas gotd->nprocs = gotd->nrepos * 2;
1996 3efd8e31 2022-10-23 thomas gotd->procs = calloc(gotd->nprocs, sizeof(*gotd->procs));
1997 3efd8e31 2022-10-23 thomas if (gotd->procs == NULL)
1998 3efd8e31 2022-10-23 thomas fatal("calloc");
1999 3efd8e31 2022-10-23 thomas for (i = 0; i < gotd->nprocs; i++) {
2000 3efd8e31 2022-10-23 thomas if (repo == NULL)
2001 3efd8e31 2022-10-23 thomas repo = TAILQ_FIRST(&gotd->repos);
2002 3efd8e31 2022-10-23 thomas proc = &gotd->procs[i];
2003 3efd8e31 2022-10-23 thomas if (i < gotd->nrepos)
2004 3efd8e31 2022-10-23 thomas proc->type = PROC_REPO_READ;
2006 3efd8e31 2022-10-23 thomas proc->type = PROC_REPO_WRITE;
2007 3efd8e31 2022-10-23 thomas if (strlcpy(proc->repo_name, repo->name,
2008 3efd8e31 2022-10-23 thomas sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
2009 3efd8e31 2022-10-23 thomas fatalx("repository name too long: %s", repo->name);
2010 3efd8e31 2022-10-23 thomas log_debug("adding repository %s", repo->name);
2011 3efd8e31 2022-10-23 thomas if (realpath(repo->path, proc->chroot_path) == NULL)
2012 3efd8e31 2022-10-23 thomas fatal("%s", repo->path);
2013 3efd8e31 2022-10-23 thomas if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
2014 3efd8e31 2022-10-23 thomas PF_UNSPEC, proc->pipe) == -1)
2015 3efd8e31 2022-10-23 thomas fatal("socketpair");
2016 3efd8e31 2022-10-23 thomas proc->pid = start_child(proc->type, proc->chroot_path, argv0,
2017 3efd8e31 2022-10-23 thomas proc->pipe[1], daemonize, verbosity);
2018 3efd8e31 2022-10-23 thomas imsg_init(&proc->iev.ibuf, proc->pipe[0]);
2019 3efd8e31 2022-10-23 thomas log_debug("proc %s %s is on fd %d",
2020 3efd8e31 2022-10-23 thomas gotd_proc_names[proc->type], proc->chroot_path,
2021 3efd8e31 2022-10-23 thomas proc->pipe[0]);
2022 3efd8e31 2022-10-23 thomas proc->iev.handler = gotd_dispatch;
2023 3efd8e31 2022-10-23 thomas proc->iev.events = EV_READ;
2024 3efd8e31 2022-10-23 thomas proc->iev.handler_arg = NULL;
2025 3efd8e31 2022-10-23 thomas event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
2026 3efd8e31 2022-10-23 thomas gotd_dispatch, &proc->iev);
2028 3efd8e31 2022-10-23 thomas repo = TAILQ_NEXT(repo, entry);
2032 3efd8e31 2022-10-23 thomas static void
2033 3efd8e31 2022-10-23 thomas apply_unveil(void)
2035 3efd8e31 2022-10-23 thomas struct gotd_repo *repo;
2037 3efd8e31 2022-10-23 thomas TAILQ_FOREACH(repo, &gotd.repos, entry) {
2038 3efd8e31 2022-10-23 thomas if (unveil(repo->path, "rwc") == -1)
2039 3efd8e31 2022-10-23 thomas fatal("unveil %s", repo->path);
2042 3efd8e31 2022-10-23 thomas if (unveil(GOT_TMPDIR_STR, "rwc") == -1)
2043 3efd8e31 2022-10-23 thomas fatal("unveil %s", GOT_TMPDIR_STR);
2045 3efd8e31 2022-10-23 thomas if (unveil(NULL, NULL) == -1)
2046 3efd8e31 2022-10-23 thomas fatal("unveil");
2050 3efd8e31 2022-10-23 thomas main(int argc, char **argv)
2052 3efd8e31 2022-10-23 thomas const struct got_error *error = NULL;
2053 3efd8e31 2022-10-23 thomas int ch, fd = -1, daemonize = 1, verbosity = 0, noaction = 0;
2054 3efd8e31 2022-10-23 thomas const char *confpath = GOTD_CONF_PATH;
2055 3efd8e31 2022-10-23 thomas char *argv0 = argv[0];
2056 3efd8e31 2022-10-23 thomas char title[2048];
2057 3efd8e31 2022-10-23 thomas gid_t groups[NGROUPS_MAX + 1];
2058 3efd8e31 2022-10-23 thomas int ngroups = NGROUPS_MAX + 1;
2059 3efd8e31 2022-10-23 thomas struct passwd *pw = NULL;
2060 3efd8e31 2022-10-23 thomas struct group *gr = NULL;
2061 3efd8e31 2022-10-23 thomas char *repo_path = NULL;
2062 3efd8e31 2022-10-23 thomas enum gotd_procid proc_id = PROC_GOTD;
2063 3efd8e31 2022-10-23 thomas struct event evsigint, evsigterm, evsighup, evsigusr1;
2064 3efd8e31 2022-10-23 thomas int *pack_fds = NULL, *temp_fds = NULL;
2066 3efd8e31 2022-10-23 thomas log_init(1, LOG_DAEMON); /* Log to stderr until daemonized. */
2068 f7065961 2022-10-27 thomas while ((ch = getopt(argc, argv, "df:nP:RvW")) != -1) {
2069 3efd8e31 2022-10-23 thomas switch (ch) {
2070 3efd8e31 2022-10-23 thomas case 'd':
2071 3efd8e31 2022-10-23 thomas daemonize = 0;
2073 3efd8e31 2022-10-23 thomas case 'f':
2074 3efd8e31 2022-10-23 thomas confpath = optarg;
2076 3efd8e31 2022-10-23 thomas case 'n':
2077 3efd8e31 2022-10-23 thomas noaction = 1;
2079 f7065961 2022-10-27 thomas case 'P':
2080 f7065961 2022-10-27 thomas repo_path = realpath(optarg, NULL);
2081 f7065961 2022-10-27 thomas if (repo_path == NULL)
2082 f7065961 2022-10-27 thomas fatal("realpath '%s'", optarg);
2084 3efd8e31 2022-10-23 thomas case 'R':
2085 3efd8e31 2022-10-23 thomas proc_id = PROC_REPO_READ;
2087 f7065961 2022-10-27 thomas case 'v':
2088 f7065961 2022-10-27 thomas if (verbosity < 3)
2089 f7065961 2022-10-27 thomas verbosity++;
2091 3efd8e31 2022-10-23 thomas case 'W':
2092 3efd8e31 2022-10-23 thomas proc_id = PROC_REPO_WRITE;
2094 3efd8e31 2022-10-23 thomas default:
2095 3efd8e31 2022-10-23 thomas usage();
2099 3efd8e31 2022-10-23 thomas argc -= optind;
2100 3efd8e31 2022-10-23 thomas argv += optind;
2102 3efd8e31 2022-10-23 thomas if (argc != 0)
2103 3efd8e31 2022-10-23 thomas usage();
2105 3efd8e31 2022-10-23 thomas if (geteuid())
2106 3efd8e31 2022-10-23 thomas fatalx("need root privileges");
2108 3efd8e31 2022-10-23 thomas log_init(daemonize ? 0 : 1, LOG_DAEMON);
2109 3efd8e31 2022-10-23 thomas log_setverbose(verbosity);
2111 3efd8e31 2022-10-23 thomas if (parse_config(confpath, proc_id, &gotd) != 0)
2112 3efd8e31 2022-10-23 thomas return 1;
2114 3efd8e31 2022-10-23 thomas if (proc_id == PROC_GOTD &&
2115 3efd8e31 2022-10-23 thomas (gotd.nrepos == 0 || TAILQ_EMPTY(&gotd.repos)))
2116 3efd8e31 2022-10-23 thomas fatalx("no repository defined in configuration file");
2118 3efd8e31 2022-10-23 thomas pw = getpwnam(gotd.user_name);
2119 3efd8e31 2022-10-23 thomas if (pw == NULL)
2120 3efd8e31 2022-10-23 thomas fatal("getpwuid: user %s not found", gotd.user_name);
2122 3efd8e31 2022-10-23 thomas if (pw->pw_uid == 0) {
2123 3efd8e31 2022-10-23 thomas fatalx("cannot run %s as %s: the user running %s "
2124 3efd8e31 2022-10-23 thomas "must not be the superuser",
2125 3efd8e31 2022-10-23 thomas getprogname(), pw->pw_name, getprogname());
2128 3efd8e31 2022-10-23 thomas if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups) == -1)
2129 3efd8e31 2022-10-23 thomas log_warnx("group membership list truncated");
2131 3efd8e31 2022-10-23 thomas gr = match_group(groups, ngroups, gotd.unix_group_name);
2132 3efd8e31 2022-10-23 thomas if (gr == NULL) {
2133 3efd8e31 2022-10-23 thomas fatalx("cannot start %s: the user running %s "
2134 3efd8e31 2022-10-23 thomas "must be a secondary member of group %s",
2135 3efd8e31 2022-10-23 thomas getprogname(), getprogname(), gotd.unix_group_name);
2137 3efd8e31 2022-10-23 thomas if (gr->gr_gid == pw->pw_gid) {
2138 3efd8e31 2022-10-23 thomas fatalx("cannot start %s: the user running %s "
2139 3efd8e31 2022-10-23 thomas "must be a secondary member of group %s, but "
2140 3efd8e31 2022-10-23 thomas "%s is the user's primary group",
2141 3efd8e31 2022-10-23 thomas getprogname(), getprogname(), gotd.unix_group_name,
2142 3efd8e31 2022-10-23 thomas gotd.unix_group_name);
2145 3efd8e31 2022-10-23 thomas if (proc_id == PROC_GOTD &&
2146 3efd8e31 2022-10-23 thomas !got_path_is_absolute(gotd.unix_socket_path))
2147 3efd8e31 2022-10-23 thomas fatalx("bad unix socket path \"%s\": must be an absolute path",
2148 3efd8e31 2022-10-23 thomas gotd.unix_socket_path);
2150 3efd8e31 2022-10-23 thomas if (noaction)
2151 3efd8e31 2022-10-23 thomas return 0;
2153 3efd8e31 2022-10-23 thomas if (proc_id == PROC_GOTD && verbosity) {
2154 3efd8e31 2022-10-23 thomas log_info("socket: %s", gotd.unix_socket_path);
2155 3efd8e31 2022-10-23 thomas log_info("user: %s", pw->pw_name);
2156 3efd8e31 2022-10-23 thomas log_info("secondary group: %s", gr->gr_name);
2158 3efd8e31 2022-10-23 thomas fd = unix_socket_listen(gotd.unix_socket_path, pw->pw_uid,
2159 3efd8e31 2022-10-23 thomas gr->gr_gid);
2160 3efd8e31 2022-10-23 thomas if (fd == -1) {
2161 3efd8e31 2022-10-23 thomas fatal("cannot listen on unix socket %s",
2162 3efd8e31 2022-10-23 thomas gotd.unix_socket_path);
2166 3efd8e31 2022-10-23 thomas if (proc_id == PROC_GOTD) {
2167 3efd8e31 2022-10-23 thomas gotd.pid = getpid();
2168 3efd8e31 2022-10-23 thomas snprintf(title, sizeof(title), "%s", gotd_proc_names[proc_id]);
2169 3efd8e31 2022-10-23 thomas start_repo_children(&gotd, argv0, daemonize, verbosity);
2170 3efd8e31 2022-10-23 thomas arc4random_buf(&clients_hash_key, sizeof(clients_hash_key));
2171 3efd8e31 2022-10-23 thomas if (daemonize && daemon(0, 0) == -1)
2172 3efd8e31 2022-10-23 thomas fatal("daemon");
2173 3efd8e31 2022-10-23 thomas } else if (proc_id == PROC_REPO_READ || proc_id == PROC_REPO_WRITE) {
2174 3efd8e31 2022-10-23 thomas error = got_repo_pack_fds_open(&pack_fds);
2175 3efd8e31 2022-10-23 thomas if (error != NULL)
2176 3efd8e31 2022-10-23 thomas fatalx("cannot open pack tempfiles: %s", error->msg);
2177 3efd8e31 2022-10-23 thomas error = got_repo_temp_fds_open(&temp_fds);
2178 3efd8e31 2022-10-23 thomas if (error != NULL)
2179 3efd8e31 2022-10-23 thomas fatalx("cannot open pack tempfiles: %s", error->msg);
2180 3efd8e31 2022-10-23 thomas if (repo_path == NULL)
2181 3efd8e31 2022-10-23 thomas fatalx("repository path not specified");
2182 3efd8e31 2022-10-23 thomas snprintf(title, sizeof(title), "%s %s",
2183 3efd8e31 2022-10-23 thomas gotd_proc_names[proc_id], repo_path);
2184 3efd8e31 2022-10-23 thomas if (chroot(repo_path) == -1)
2185 3efd8e31 2022-10-23 thomas fatal("chroot");
2186 3efd8e31 2022-10-23 thomas if (chdir("/") == -1)
2187 3efd8e31 2022-10-23 thomas fatal("chdir(\"/\")");
2188 3efd8e31 2022-10-23 thomas if (daemonize && daemon(1, 0) == -1)
2189 3efd8e31 2022-10-23 thomas fatal("daemon");
2191 3efd8e31 2022-10-23 thomas fatal("invalid process id %d", proc_id);
2193 3efd8e31 2022-10-23 thomas setproctitle("%s", title);
2194 3efd8e31 2022-10-23 thomas log_procinit(title);
2196 3efd8e31 2022-10-23 thomas /* Drop root privileges. */
2197 3efd8e31 2022-10-23 thomas if (setgid(pw->pw_gid) == -1)
2198 3efd8e31 2022-10-23 thomas fatal("setgid %d failed", pw->pw_gid);
2199 3efd8e31 2022-10-23 thomas if (setuid(pw->pw_uid) == -1)
2200 3efd8e31 2022-10-23 thomas fatal("setuid %d failed", pw->pw_uid);
2202 3efd8e31 2022-10-23 thomas event_init();
2204 3efd8e31 2022-10-23 thomas switch (proc_id) {
2205 3efd8e31 2022-10-23 thomas case PROC_GOTD:
2206 3efd8e31 2022-10-23 thomas #ifndef PROFILE
2207 3efd8e31 2022-10-23 thomas if (pledge("stdio rpath wpath cpath proc getpw sendfd recvfd "
2208 3efd8e31 2022-10-23 thomas "fattr flock unix unveil", NULL) == -1)
2209 3efd8e31 2022-10-23 thomas err(1, "pledge");
2212 3efd8e31 2022-10-23 thomas case PROC_REPO_READ:
2213 3efd8e31 2022-10-23 thomas #ifndef PROFILE
2214 cc4cc677 2022-10-28 thomas if (pledge("stdio rpath recvfd", NULL) == -1)
2215 3efd8e31 2022-10-23 thomas err(1, "pledge");
2217 3efd8e31 2022-10-23 thomas repo_read_main(title, pack_fds, temp_fds);
2218 3efd8e31 2022-10-23 thomas /* NOTREACHED */
2219 3efd8e31 2022-10-23 thomas exit(0);
2220 3efd8e31 2022-10-23 thomas case PROC_REPO_WRITE:
2221 3efd8e31 2022-10-23 thomas #ifndef PROFILE
2222 3efd8e31 2022-10-23 thomas if (pledge("stdio rpath sendfd recvfd", NULL) == -1)
2223 3efd8e31 2022-10-23 thomas err(1, "pledge");
2225 3efd8e31 2022-10-23 thomas repo_write_main(title, pack_fds, temp_fds);
2226 3efd8e31 2022-10-23 thomas /* NOTREACHED */
2227 3efd8e31 2022-10-23 thomas exit(0);
2228 3efd8e31 2022-10-23 thomas default:
2229 3efd8e31 2022-10-23 thomas fatal("invalid process id %d", proc_id);
2232 3efd8e31 2022-10-23 thomas if (proc_id != PROC_GOTD)
2233 3efd8e31 2022-10-23 thomas fatal("invalid process id %d", proc_id);
2235 3efd8e31 2022-10-23 thomas apply_unveil();
2237 3efd8e31 2022-10-23 thomas signal_set(&evsigint, SIGINT, gotd_sighdlr, NULL);
2238 3efd8e31 2022-10-23 thomas signal_set(&evsigterm, SIGTERM, gotd_sighdlr, NULL);
2239 3efd8e31 2022-10-23 thomas signal_set(&evsighup, SIGHUP, gotd_sighdlr, NULL);
2240 3efd8e31 2022-10-23 thomas signal_set(&evsigusr1, SIGUSR1, gotd_sighdlr, NULL);
2241 3efd8e31 2022-10-23 thomas signal(SIGPIPE, SIG_IGN);
2243 3efd8e31 2022-10-23 thomas signal_add(&evsigint, NULL);
2244 3efd8e31 2022-10-23 thomas signal_add(&evsigterm, NULL);
2245 3efd8e31 2022-10-23 thomas signal_add(&evsighup, NULL);
2246 3efd8e31 2022-10-23 thomas signal_add(&evsigusr1, NULL);
2248 3efd8e31 2022-10-23 thomas event_set(&gotd.ev, fd, EV_READ | EV_PERSIST, gotd_accept, NULL);
2249 3efd8e31 2022-10-23 thomas if (event_add(&gotd.ev, NULL))
2250 3efd8e31 2022-10-23 thomas fatalx("event add");
2251 3efd8e31 2022-10-23 thomas evtimer_set(&gotd.pause, gotd_accept_paused, NULL);
2253 3efd8e31 2022-10-23 thomas event_dispatch();
2255 3efd8e31 2022-10-23 thomas if (fd != -1)
2256 3efd8e31 2022-10-23 thomas close(fd);
2257 3efd8e31 2022-10-23 thomas if (pack_fds)
2258 3efd8e31 2022-10-23 thomas got_repo_pack_fds_close(pack_fds);
2259 3efd8e31 2022-10-23 thomas free(repo_path);
2260 3efd8e31 2022-10-23 thomas return 0;
