2 3efd8e31 2022-10-23 thomas * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
3 729a7e24 2022-11-17 thomas * Copyright (c) 2015 Ted Unangst <tedu@openbsd.org>
5 3efd8e31 2022-10-23 thomas * Permission to use, copy, modify, and distribute this software for any
6 3efd8e31 2022-10-23 thomas * purpose with or without fee is hereby granted, provided that the above
7 3efd8e31 2022-10-23 thomas * copyright notice and this permission notice appear in all copies.
9 3efd8e31 2022-10-23 thomas * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 3efd8e31 2022-10-23 thomas * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 3efd8e31 2022-10-23 thomas * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 3efd8e31 2022-10-23 thomas * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 3efd8e31 2022-10-23 thomas * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 3efd8e31 2022-10-23 thomas * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 3efd8e31 2022-10-23 thomas * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 3efd8e31 2022-10-23 thomas #include <sys/queue.h>
19 3efd8e31 2022-10-23 thomas #include <sys/tree.h>
20 3efd8e31 2022-10-23 thomas #include <sys/time.h>
21 3efd8e31 2022-10-23 thomas #include <sys/types.h>
22 3efd8e31 2022-10-23 thomas #include <sys/stat.h>
23 3efd8e31 2022-10-23 thomas #include <sys/socket.h>
24 3efd8e31 2022-10-23 thomas #include <sys/un.h>
25 3efd8e31 2022-10-23 thomas #include <sys/wait.h>
27 3efd8e31 2022-10-23 thomas #include <fcntl.h>
28 3efd8e31 2022-10-23 thomas #include <err.h>
29 3efd8e31 2022-10-23 thomas #include <errno.h>
30 3efd8e31 2022-10-23 thomas #include <event.h>
31 3efd8e31 2022-10-23 thomas #include <limits.h>
32 3efd8e31 2022-10-23 thomas #include <pwd.h>
33 3efd8e31 2022-10-23 thomas #include <grp.h>
34 3efd8e31 2022-10-23 thomas #include <imsg.h>
35 3efd8e31 2022-10-23 thomas #include <sha1.h>
36 3efd8e31 2022-10-23 thomas #include <signal.h>
37 3efd8e31 2022-10-23 thomas #include <siphash.h>
38 3efd8e31 2022-10-23 thomas #include <stdarg.h>
39 3efd8e31 2022-10-23 thomas #include <stdio.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 729a7e24 2022-11-17 thomas #include "auth.h"
63 3efd8e31 2022-10-23 thomas #include "repo_read.h"
64 3efd8e31 2022-10-23 thomas #include "repo_write.h"
66 3efd8e31 2022-10-23 thomas #ifndef nitems
67 3efd8e31 2022-10-23 thomas #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
70 3efd8e31 2022-10-23 thomas struct gotd_client {
71 3efd8e31 2022-10-23 thomas STAILQ_ENTRY(gotd_client) entry;
72 3efd8e31 2022-10-23 thomas enum gotd_client_state state;
73 3efd8e31 2022-10-23 thomas struct gotd_client_capability *capabilities;
74 3efd8e31 2022-10-23 thomas size_t ncapa_alloc;
75 3efd8e31 2022-10-23 thomas size_t ncapabilities;
76 3efd8e31 2022-10-23 thomas uint32_t id;
78 3efd8e31 2022-10-23 thomas int delta_cache_fd;
79 3efd8e31 2022-10-23 thomas struct gotd_imsgev iev;
80 3efd8e31 2022-10-23 thomas struct event tmo;
81 3efd8e31 2022-10-23 thomas uid_t euid;
82 3efd8e31 2022-10-23 thomas gid_t egid;
83 3efd8e31 2022-10-23 thomas struct gotd_child_proc *repo_read;
84 3efd8e31 2022-10-23 thomas struct gotd_child_proc *repo_write;
85 3efd8e31 2022-10-23 thomas char *packfile_path;
86 3efd8e31 2022-10-23 thomas char *packidx_path;
87 3efd8e31 2022-10-23 thomas int nref_updates;
89 3efd8e31 2022-10-23 thomas STAILQ_HEAD(gotd_clients, gotd_client);
91 3efd8e31 2022-10-23 thomas static struct gotd_clients gotd_clients[GOTD_CLIENT_TABLE_SIZE];
92 3efd8e31 2022-10-23 thomas static SIPHASH_KEY clients_hash_key;
93 3efd8e31 2022-10-23 thomas volatile int client_cnt;
94 3efd8e31 2022-10-23 thomas static struct timeval timeout = { 3600, 0 };
95 3efd8e31 2022-10-23 thomas static int inflight;
96 3efd8e31 2022-10-23 thomas static struct gotd gotd;
98 3efd8e31 2022-10-23 thomas void gotd_sighdlr(int sig, short event, void *arg);
99 c902213d 2022-10-29 thomas static void gotd_shutdown(void);
101 3efd8e31 2022-10-23 thomas __dead static void
104 5ac853dc 2022-10-24 thomas fprintf(stderr, "usage: %s [-dv] [-f config-file]\n", getprogname());
108 3efd8e31 2022-10-23 thomas static int
109 3efd8e31 2022-10-23 thomas unix_socket_listen(const char *unix_socket_path, uid_t uid, gid_t gid)
111 3efd8e31 2022-10-23 thomas struct sockaddr_un sun;
112 3efd8e31 2022-10-23 thomas int fd = -1;
113 3efd8e31 2022-10-23 thomas mode_t old_umask, mode;
115 3efd8e31 2022-10-23 thomas fd = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK| SOCK_CLOEXEC, 0);
116 3efd8e31 2022-10-23 thomas if (fd == -1) {
117 3efd8e31 2022-10-23 thomas log_warn("socket");
118 3efd8e31 2022-10-23 thomas return -1;
121 3efd8e31 2022-10-23 thomas sun.sun_family = AF_UNIX;
122 3efd8e31 2022-10-23 thomas if (strlcpy(sun.sun_path, unix_socket_path,
123 3efd8e31 2022-10-23 thomas sizeof(sun.sun_path)) >= sizeof(sun.sun_path)) {
124 3efd8e31 2022-10-23 thomas log_warnx("%s: name too long", unix_socket_path);
125 3efd8e31 2022-10-23 thomas close(fd);
126 3efd8e31 2022-10-23 thomas return -1;
129 3efd8e31 2022-10-23 thomas if (unlink(unix_socket_path) == -1) {
130 3efd8e31 2022-10-23 thomas if (errno != ENOENT) {
131 3efd8e31 2022-10-23 thomas log_warn("unlink %s", unix_socket_path);
132 3efd8e31 2022-10-23 thomas close(fd);
133 3efd8e31 2022-10-23 thomas return -1;
137 3efd8e31 2022-10-23 thomas old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
138 3efd8e31 2022-10-23 thomas mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP;
140 3efd8e31 2022-10-23 thomas if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
141 3efd8e31 2022-10-23 thomas log_warn("bind: %s", unix_socket_path);
142 3efd8e31 2022-10-23 thomas close(fd);
143 3efd8e31 2022-10-23 thomas umask(old_umask);
144 3efd8e31 2022-10-23 thomas return -1;
147 3efd8e31 2022-10-23 thomas umask(old_umask);
149 3efd8e31 2022-10-23 thomas if (chmod(unix_socket_path, mode) == -1) {
150 3efd8e31 2022-10-23 thomas log_warn("chmod %o %s", mode, unix_socket_path);
151 3efd8e31 2022-10-23 thomas close(fd);
152 3efd8e31 2022-10-23 thomas unlink(unix_socket_path);
153 3efd8e31 2022-10-23 thomas return -1;
156 3efd8e31 2022-10-23 thomas if (chown(unix_socket_path, uid, gid) == -1) {
157 3efd8e31 2022-10-23 thomas log_warn("chown %s uid=%d gid=%d", unix_socket_path, uid, gid);
158 3efd8e31 2022-10-23 thomas close(fd);
159 3efd8e31 2022-10-23 thomas unlink(unix_socket_path);
160 3efd8e31 2022-10-23 thomas return -1;
163 3efd8e31 2022-10-23 thomas if (listen(fd, GOTD_UNIX_SOCKET_BACKLOG) == -1) {
164 3efd8e31 2022-10-23 thomas log_warn("listen");
165 3efd8e31 2022-10-23 thomas close(fd);
166 3efd8e31 2022-10-23 thomas unlink(unix_socket_path);
167 3efd8e31 2022-10-23 thomas return -1;
170 3efd8e31 2022-10-23 thomas return fd;
173 3efd8e31 2022-10-23 thomas static struct group *
174 3efd8e31 2022-10-23 thomas match_group(gid_t *groups, int ngroups, const char *unix_group_name)
176 3efd8e31 2022-10-23 thomas struct group *gr;
179 3efd8e31 2022-10-23 thomas for (i = 0; i < ngroups; i++) {
180 3efd8e31 2022-10-23 thomas gr = getgrgid(groups[i]);
181 3efd8e31 2022-10-23 thomas if (gr == NULL) {
182 3efd8e31 2022-10-23 thomas log_warn("getgrgid %d", groups[i]);
183 3efd8e31 2022-10-23 thomas continue;
185 3efd8e31 2022-10-23 thomas if (strcmp(gr->gr_name, unix_group_name) == 0)
186 3efd8e31 2022-10-23 thomas return gr;
189 3efd8e31 2022-10-23 thomas return NULL;
192 3efd8e31 2022-10-23 thomas static int
193 3efd8e31 2022-10-23 thomas accept_reserve(int fd, struct sockaddr *addr, socklen_t *addrlen,
194 3efd8e31 2022-10-23 thomas int reserve, volatile int *counter)
198 3efd8e31 2022-10-23 thomas if (getdtablecount() + reserve +
199 3efd8e31 2022-10-23 thomas ((*counter + 1) * GOTD_FD_NEEDED) >= getdtablesize()) {
200 3efd8e31 2022-10-23 thomas log_debug("inflight fds exceeded");
201 3efd8e31 2022-10-23 thomas errno = EMFILE;
202 3efd8e31 2022-10-23 thomas return -1;
205 3efd8e31 2022-10-23 thomas if ((ret = accept4(fd, addr, addrlen,
206 3efd8e31 2022-10-23 thomas SOCK_NONBLOCK | SOCK_CLOEXEC)) > -1) {
207 3efd8e31 2022-10-23 thomas (*counter)++;
210 3efd8e31 2022-10-23 thomas return ret;
213 3efd8e31 2022-10-23 thomas static uint64_t
214 3efd8e31 2022-10-23 thomas client_hash(uint32_t client_id)
216 3efd8e31 2022-10-23 thomas return SipHash24(&clients_hash_key, &client_id, sizeof(client_id));
219 3efd8e31 2022-10-23 thomas static void
220 3efd8e31 2022-10-23 thomas add_client(struct gotd_client *client)
222 3efd8e31 2022-10-23 thomas uint64_t slot = client_hash(client->id) % nitems(gotd_clients);
223 3efd8e31 2022-10-23 thomas STAILQ_INSERT_HEAD(&gotd_clients[slot], client, entry);
224 3efd8e31 2022-10-23 thomas client_cnt++;
227 3efd8e31 2022-10-23 thomas static struct gotd_client *
228 3efd8e31 2022-10-23 thomas find_client(uint32_t client_id)
230 3efd8e31 2022-10-23 thomas uint64_t slot;
231 3efd8e31 2022-10-23 thomas struct gotd_client *c;
233 3efd8e31 2022-10-23 thomas slot = client_hash(client_id) % nitems(gotd_clients);
234 3efd8e31 2022-10-23 thomas STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
235 3efd8e31 2022-10-23 thomas if (c->id == client_id)
236 3efd8e31 2022-10-23 thomas return c;
239 3efd8e31 2022-10-23 thomas return NULL;
242 3efd8e31 2022-10-23 thomas static uint32_t
243 3efd8e31 2022-10-23 thomas get_client_id(void)
245 3efd8e31 2022-10-23 thomas int duplicate = 0;
246 3efd8e31 2022-10-23 thomas uint32_t id;
249 3efd8e31 2022-10-23 thomas id = arc4random();
250 3efd8e31 2022-10-23 thomas duplicate = (find_client(id) != NULL);
251 3efd8e31 2022-10-23 thomas } while (duplicate || id == 0);
253 3efd8e31 2022-10-23 thomas return id;
256 3efd8e31 2022-10-23 thomas static struct gotd_child_proc *
257 3efd8e31 2022-10-23 thomas get_client_proc(struct gotd_client *client)
259 3efd8e31 2022-10-23 thomas if (client->repo_read && client->repo_write) {
260 3efd8e31 2022-10-23 thomas fatalx("uid %d is reading and writing in the same session",
261 3efd8e31 2022-10-23 thomas client->euid);
262 3efd8e31 2022-10-23 thomas /* NOTREACHED */
265 3efd8e31 2022-10-23 thomas if (client->repo_read)
266 3efd8e31 2022-10-23 thomas return client->repo_read;
267 3efd8e31 2022-10-23 thomas else if (client->repo_write)
268 3efd8e31 2022-10-23 thomas return client->repo_write;
270 3efd8e31 2022-10-23 thomas return NULL;
273 3efd8e31 2022-10-23 thomas static int
274 3efd8e31 2022-10-23 thomas client_is_reading(struct gotd_client *client)
276 3efd8e31 2022-10-23 thomas return client->repo_read != NULL;
279 3efd8e31 2022-10-23 thomas static int
280 3efd8e31 2022-10-23 thomas client_is_writing(struct gotd_client *client)
282 3efd8e31 2022-10-23 thomas return client->repo_write != NULL;
285 3efd8e31 2022-10-23 thomas static const struct got_error *
286 3efd8e31 2022-10-23 thomas ensure_client_is_reading(struct gotd_client *client)
288 3efd8e31 2022-10-23 thomas if (!client_is_reading(client)) {
289 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
290 3efd8e31 2022-10-23 thomas "uid %d made a read-request but is not reading from "
291 3efd8e31 2022-10-23 thomas "a repository", client->euid);
294 3efd8e31 2022-10-23 thomas return NULL;
297 3efd8e31 2022-10-23 thomas static const struct got_error *
298 3efd8e31 2022-10-23 thomas ensure_client_is_writing(struct gotd_client *client)
300 3efd8e31 2022-10-23 thomas if (!client_is_writing(client)) {
301 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
302 3efd8e31 2022-10-23 thomas "uid %d made a write-request but is not writing to "
303 3efd8e31 2022-10-23 thomas "a repository", client->euid);
306 3efd8e31 2022-10-23 thomas return NULL;
309 3efd8e31 2022-10-23 thomas static const struct got_error *
310 3efd8e31 2022-10-23 thomas ensure_client_is_not_writing(struct gotd_client *client)
312 3efd8e31 2022-10-23 thomas if (client_is_writing(client)) {
313 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
314 3efd8e31 2022-10-23 thomas "uid %d made a read-request but is writing to "
315 3efd8e31 2022-10-23 thomas "a repository", client->euid);
318 3efd8e31 2022-10-23 thomas return NULL;
321 3efd8e31 2022-10-23 thomas static const struct got_error *
322 3efd8e31 2022-10-23 thomas ensure_client_is_not_reading(struct gotd_client *client)
324 3efd8e31 2022-10-23 thomas if (client_is_reading(client)) {
325 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
326 3efd8e31 2022-10-23 thomas "uid %d made a write-request but is reading from "
327 3efd8e31 2022-10-23 thomas "a repository", client->euid);
330 3efd8e31 2022-10-23 thomas return NULL;
333 3efd8e31 2022-10-23 thomas static void
334 3efd8e31 2022-10-23 thomas disconnect(struct gotd_client *client)
336 3efd8e31 2022-10-23 thomas struct gotd_imsg_disconnect idisconnect;
337 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc = get_client_proc(client);
338 3efd8e31 2022-10-23 thomas uint64_t slot;
340 3efd8e31 2022-10-23 thomas log_debug("uid %d: disconnecting", client->euid);
342 3efd8e31 2022-10-23 thomas idisconnect.client_id = client->id;
343 c902213d 2022-10-29 thomas if (proc) {
344 c902213d 2022-10-29 thomas if (gotd_imsg_compose_event(&proc->iev,
345 c902213d 2022-10-29 thomas GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
346 c902213d 2022-10-29 thomas &idisconnect, sizeof(idisconnect)) == -1)
347 c902213d 2022-10-29 thomas log_warn("imsg compose DISCONNECT");
349 3efd8e31 2022-10-23 thomas slot = client_hash(client->id) % nitems(gotd_clients);
350 3efd8e31 2022-10-23 thomas STAILQ_REMOVE(&gotd_clients[slot], client, gotd_client, entry);
351 3efd8e31 2022-10-23 thomas imsg_clear(&client->iev.ibuf);
352 3efd8e31 2022-10-23 thomas event_del(&client->iev.ev);
353 3efd8e31 2022-10-23 thomas evtimer_del(&client->tmo);
354 3efd8e31 2022-10-23 thomas close(client->fd);
355 3efd8e31 2022-10-23 thomas if (client->delta_cache_fd != -1)
356 3efd8e31 2022-10-23 thomas close(client->delta_cache_fd);
357 3efd8e31 2022-10-23 thomas if (client->packfile_path) {
358 3efd8e31 2022-10-23 thomas if (unlink(client->packfile_path) == -1 && errno != ENOENT)
359 3efd8e31 2022-10-23 thomas log_warn("unlink %s: ", client->packfile_path);
360 3efd8e31 2022-10-23 thomas free(client->packfile_path);
362 3efd8e31 2022-10-23 thomas if (client->packidx_path) {
363 3efd8e31 2022-10-23 thomas if (unlink(client->packidx_path) == -1 && errno != ENOENT)
364 3efd8e31 2022-10-23 thomas log_warn("unlink %s: ", client->packidx_path);
365 3efd8e31 2022-10-23 thomas free(client->packidx_path);
367 3efd8e31 2022-10-23 thomas free(client->capabilities);
368 3efd8e31 2022-10-23 thomas free(client);
369 3efd8e31 2022-10-23 thomas inflight--;
370 3efd8e31 2022-10-23 thomas client_cnt--;
373 3efd8e31 2022-10-23 thomas static void
374 3efd8e31 2022-10-23 thomas disconnect_on_error(struct gotd_client *client, const struct got_error *err)
376 3efd8e31 2022-10-23 thomas struct imsgbuf ibuf;
378 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
379 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_EOF) {
380 3efd8e31 2022-10-23 thomas imsg_init(&ibuf, client->fd);
381 3efd8e31 2022-10-23 thomas gotd_imsg_send_error(&ibuf, 0, PROC_GOTD, err);
382 3efd8e31 2022-10-23 thomas imsg_clear(&ibuf);
384 3efd8e31 2022-10-23 thomas disconnect(client);
387 c902213d 2022-10-29 thomas static const struct got_error *
388 c902213d 2022-10-29 thomas send_repo_info(struct gotd_imsgev *iev, struct gotd_repo *repo)
390 c902213d 2022-10-29 thomas const struct got_error *err = NULL;
391 c902213d 2022-10-29 thomas struct gotd_imsg_info_repo irepo;
393 c902213d 2022-10-29 thomas memset(&irepo, 0, sizeof(irepo));
395 c902213d 2022-10-29 thomas if (strlcpy(irepo.repo_name, repo->name, sizeof(irepo.repo_name))
396 c902213d 2022-10-29 thomas >= sizeof(irepo.repo_name))
397 c902213d 2022-10-29 thomas return got_error_msg(GOT_ERR_NO_SPACE, "repo name too long");
398 c902213d 2022-10-29 thomas if (strlcpy(irepo.repo_path, repo->path, sizeof(irepo.repo_path))
399 c902213d 2022-10-29 thomas >= sizeof(irepo.repo_path))
400 c902213d 2022-10-29 thomas return got_error_msg(GOT_ERR_NO_SPACE, "repo path too long");
402 c902213d 2022-10-29 thomas if (gotd_imsg_compose_event(iev, GOTD_IMSG_INFO_REPO, PROC_GOTD, -1,
403 c902213d 2022-10-29 thomas &irepo, sizeof(irepo)) == -1) {
404 c902213d 2022-10-29 thomas err = got_error_from_errno("imsg compose INFO_REPO");
406 c902213d 2022-10-29 thomas return err;
409 c902213d 2022-10-29 thomas return NULL;
412 c902213d 2022-10-29 thomas static const struct got_error *
413 c902213d 2022-10-29 thomas send_capability(struct gotd_client_capability *capa, struct gotd_imsgev* iev)
415 c902213d 2022-10-29 thomas const struct got_error *err = NULL;
416 c902213d 2022-10-29 thomas struct gotd_imsg_capability icapa;
417 c902213d 2022-10-29 thomas size_t len;
418 c902213d 2022-10-29 thomas struct ibuf *wbuf;
420 c902213d 2022-10-29 thomas memset(&icapa, 0, sizeof(icapa));
422 c902213d 2022-10-29 thomas icapa.key_len = strlen(capa->key);
423 c902213d 2022-10-29 thomas len = sizeof(icapa) + icapa.key_len;
424 c902213d 2022-10-29 thomas if (capa->value) {
425 c902213d 2022-10-29 thomas icapa.value_len = strlen(capa->value);
426 c902213d 2022-10-29 thomas len += icapa.value_len;
429 c902213d 2022-10-29 thomas wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_CAPABILITY, 0, 0, len);
430 c902213d 2022-10-29 thomas if (wbuf == NULL) {
431 c902213d 2022-10-29 thomas err = got_error_from_errno("imsg_create CAPABILITY");
432 c902213d 2022-10-29 thomas return err;
435 c902213d 2022-10-29 thomas if (imsg_add(wbuf, &icapa, sizeof(icapa)) == -1)
436 c902213d 2022-10-29 thomas return got_error_from_errno("imsg_add CAPABILITY");
437 c902213d 2022-10-29 thomas if (imsg_add(wbuf, capa->key, icapa.key_len) == -1)
438 c902213d 2022-10-29 thomas return got_error_from_errno("imsg_add CAPABILITY");
439 c902213d 2022-10-29 thomas if (capa->value) {
440 c902213d 2022-10-29 thomas if (imsg_add(wbuf, capa->value, icapa.value_len) == -1)
441 c902213d 2022-10-29 thomas return got_error_from_errno("imsg_add CAPABILITY");
444 c902213d 2022-10-29 thomas wbuf->fd = -1;
445 c902213d 2022-10-29 thomas imsg_close(&iev->ibuf, wbuf);
447 c902213d 2022-10-29 thomas gotd_imsg_event_add(iev);
449 c902213d 2022-10-29 thomas return NULL;
452 c902213d 2022-10-29 thomas static const struct got_error *
453 c902213d 2022-10-29 thomas send_client_info(struct gotd_imsgev *iev, struct gotd_client *client)
455 c902213d 2022-10-29 thomas const struct got_error *err = NULL;
456 c902213d 2022-10-29 thomas struct gotd_imsg_info_client iclient;
457 c902213d 2022-10-29 thomas struct gotd_child_proc *proc;
458 c902213d 2022-10-29 thomas size_t i;
460 c902213d 2022-10-29 thomas memset(&iclient, 0, sizeof(iclient));
461 c902213d 2022-10-29 thomas iclient.euid = client->euid;
462 c902213d 2022-10-29 thomas iclient.egid = client->egid;
464 c902213d 2022-10-29 thomas proc = get_client_proc(client);
465 c902213d 2022-10-29 thomas if (proc) {
466 c902213d 2022-10-29 thomas if (strlcpy(iclient.repo_name, proc->chroot_path,
467 c902213d 2022-10-29 thomas sizeof(iclient.repo_name)) >= sizeof(iclient.repo_name)) {
468 c902213d 2022-10-29 thomas return got_error_msg(GOT_ERR_NO_SPACE,
469 c902213d 2022-10-29 thomas "repo name too long");
471 c902213d 2022-10-29 thomas if (client_is_writing(client))
472 c902213d 2022-10-29 thomas iclient.is_writing = 1;
475 c902213d 2022-10-29 thomas iclient.state = client->state;
476 c902213d 2022-10-29 thomas iclient.ncapabilities = client->ncapabilities;
478 c902213d 2022-10-29 thomas if (gotd_imsg_compose_event(iev, GOTD_IMSG_INFO_CLIENT, PROC_GOTD, -1,
479 c902213d 2022-10-29 thomas &iclient, sizeof(iclient)) == -1) {
480 c902213d 2022-10-29 thomas err = got_error_from_errno("imsg compose INFO_CLIENT");
482 c902213d 2022-10-29 thomas return err;
485 c902213d 2022-10-29 thomas for (i = 0; i < client->ncapabilities; i++) {
486 c902213d 2022-10-29 thomas struct gotd_client_capability *capa;
487 c902213d 2022-10-29 thomas capa = &client->capabilities[i];
488 c902213d 2022-10-29 thomas err = send_capability(capa, iev);
490 c902213d 2022-10-29 thomas return err;
493 c902213d 2022-10-29 thomas return NULL;
496 c902213d 2022-10-29 thomas static const struct got_error *
497 c902213d 2022-10-29 thomas send_info(struct gotd_client *client)
499 c902213d 2022-10-29 thomas const struct got_error *err = NULL;
500 c902213d 2022-10-29 thomas struct gotd_imsg_info info;
501 c902213d 2022-10-29 thomas uint64_t slot;
502 c902213d 2022-10-29 thomas struct gotd_repo *repo;
504 c902213d 2022-10-29 thomas info.pid = gotd.pid;
505 c902213d 2022-10-29 thomas info.verbosity = gotd.verbosity;
506 c902213d 2022-10-29 thomas info.nrepos = gotd.nrepos;
507 c902213d 2022-10-29 thomas info.nclients = client_cnt - 1;
509 c902213d 2022-10-29 thomas if (gotd_imsg_compose_event(&client->iev, GOTD_IMSG_INFO, PROC_GOTD, -1,
510 c902213d 2022-10-29 thomas &info, sizeof(info)) == -1) {
511 c902213d 2022-10-29 thomas err = got_error_from_errno("imsg compose INFO");
513 c902213d 2022-10-29 thomas return err;
516 c902213d 2022-10-29 thomas TAILQ_FOREACH(repo, &gotd.repos, entry) {
517 c902213d 2022-10-29 thomas err = send_repo_info(&client->iev, repo);
519 c902213d 2022-10-29 thomas return err;
522 c902213d 2022-10-29 thomas for (slot = 0; slot < nitems(gotd_clients); slot++) {
523 c902213d 2022-10-29 thomas struct gotd_client *c;
524 c902213d 2022-10-29 thomas STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
525 c902213d 2022-10-29 thomas if (c->id == client->id)
526 c902213d 2022-10-29 thomas continue;
527 c902213d 2022-10-29 thomas err = send_client_info(&client->iev, c);
529 c902213d 2022-10-29 thomas return err;
533 c902213d 2022-10-29 thomas return NULL;
536 c902213d 2022-10-29 thomas static const struct got_error *
537 c902213d 2022-10-29 thomas stop_gotd(struct gotd_client *client)
540 c902213d 2022-10-29 thomas if (client->euid != 0)
541 c902213d 2022-10-29 thomas return got_error_set_errno(EPERM, "stop");
543 c902213d 2022-10-29 thomas gotd_shutdown();
544 c902213d 2022-10-29 thomas /* NOTREACHED */
545 729a7e24 2022-11-17 thomas return NULL;
548 729a7e24 2022-11-17 thomas static struct gotd_repo *
549 729a7e24 2022-11-17 thomas find_repo_by_name(const char *repo_name)
551 729a7e24 2022-11-17 thomas struct gotd_repo *repo;
552 729a7e24 2022-11-17 thomas size_t namelen;
554 729a7e24 2022-11-17 thomas TAILQ_FOREACH(repo, &gotd.repos, entry) {
555 729a7e24 2022-11-17 thomas namelen = strlen(repo->name);
556 729a7e24 2022-11-17 thomas if (strncmp(repo->name, repo_name, namelen) != 0)
557 729a7e24 2022-11-17 thomas continue;
558 729a7e24 2022-11-17 thomas if (repo_name[namelen] == '\0' ||
559 729a7e24 2022-11-17 thomas strcmp(&repo_name[namelen], ".git") == 0)
560 729a7e24 2022-11-17 thomas return repo;
563 c902213d 2022-10-29 thomas return NULL;
566 3efd8e31 2022-10-23 thomas static struct gotd_child_proc *
567 3efd8e31 2022-10-23 thomas find_proc_by_repo_name(enum gotd_procid proc_id, const char *repo_name)
569 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
571 3efd8e31 2022-10-23 thomas size_t namelen;
573 3efd8e31 2022-10-23 thomas for (i = 0; i < gotd.nprocs; i++) {
574 3efd8e31 2022-10-23 thomas proc = &gotd.procs[i];
575 3efd8e31 2022-10-23 thomas if (proc->type != proc_id)
576 3efd8e31 2022-10-23 thomas continue;
577 3efd8e31 2022-10-23 thomas namelen = strlen(proc->repo_name);
578 3efd8e31 2022-10-23 thomas if (strncmp(proc->repo_name, repo_name, namelen) != 0)
579 3efd8e31 2022-10-23 thomas continue;
580 3efd8e31 2022-10-23 thomas if (repo_name[namelen] == '\0' ||
581 3efd8e31 2022-10-23 thomas strcmp(&repo_name[namelen], ".git") == 0)
582 3efd8e31 2022-10-23 thomas return proc;
585 3efd8e31 2022-10-23 thomas return NULL;
588 3efd8e31 2022-10-23 thomas static struct gotd_child_proc *
589 3efd8e31 2022-10-23 thomas find_proc_by_fd(int fd)
591 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
594 3efd8e31 2022-10-23 thomas for (i = 0; i < gotd.nprocs; i++) {
595 3efd8e31 2022-10-23 thomas proc = &gotd.procs[i];
596 3efd8e31 2022-10-23 thomas if (proc->iev.ibuf.fd == fd)
597 3efd8e31 2022-10-23 thomas return proc;
600 3efd8e31 2022-10-23 thomas return NULL;
603 3efd8e31 2022-10-23 thomas static const struct got_error *
604 3efd8e31 2022-10-23 thomas forward_list_refs_request(struct gotd_client *client, struct imsg *imsg)
606 3efd8e31 2022-10-23 thomas const struct got_error *err;
607 3efd8e31 2022-10-23 thomas struct gotd_imsg_list_refs ireq;
608 3efd8e31 2022-10-23 thomas struct gotd_imsg_list_refs_internal ilref;
609 729a7e24 2022-11-17 thomas struct gotd_repo *repo = NULL;
610 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc = NULL;
611 3efd8e31 2022-10-23 thomas size_t datalen;
612 3efd8e31 2022-10-23 thomas int fd = -1;
614 3efd8e31 2022-10-23 thomas log_debug("list-refs request from uid %d", client->euid);
616 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
617 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireq))
618 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
620 3efd8e31 2022-10-23 thomas memcpy(&ireq, imsg->data, datalen);
622 3efd8e31 2022-10-23 thomas memset(&ilref, 0, sizeof(ilref));
623 3efd8e31 2022-10-23 thomas ilref.client_id = client->id;
625 3efd8e31 2022-10-23 thomas if (ireq.client_is_reading) {
626 3efd8e31 2022-10-23 thomas err = ensure_client_is_not_writing(client);
628 3efd8e31 2022-10-23 thomas return err;
629 729a7e24 2022-11-17 thomas repo = find_repo_by_name(ireq.repo_name);
630 729a7e24 2022-11-17 thomas if (repo == NULL)
631 729a7e24 2022-11-17 thomas return got_error(GOT_ERR_NOT_GIT_REPO);
632 729a7e24 2022-11-17 thomas err = gotd_auth_check(&repo->rules, repo->name,
633 ff260661 2022-11-17 thomas client->euid, client->egid, GOTD_AUTH_READ);
635 729a7e24 2022-11-17 thomas return err;
636 3efd8e31 2022-10-23 thomas client->repo_read = find_proc_by_repo_name(PROC_REPO_READ,
637 3efd8e31 2022-10-23 thomas ireq.repo_name);
638 3efd8e31 2022-10-23 thomas if (client->repo_read == NULL)
639 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_NOT_GIT_REPO);
641 3efd8e31 2022-10-23 thomas err = ensure_client_is_not_reading(client);
643 729a7e24 2022-11-17 thomas return err;
644 729a7e24 2022-11-17 thomas repo = find_repo_by_name(ireq.repo_name);
645 729a7e24 2022-11-17 thomas if (repo == NULL)
646 729a7e24 2022-11-17 thomas return got_error(GOT_ERR_NOT_GIT_REPO);
647 ff260661 2022-11-17 thomas err = gotd_auth_check(&repo->rules, repo->name, client->euid,
648 ff260661 2022-11-17 thomas client->egid, GOTD_AUTH_READ | GOTD_AUTH_WRITE);
650 3efd8e31 2022-10-23 thomas return err;
651 3efd8e31 2022-10-23 thomas client->repo_write = find_proc_by_repo_name(PROC_REPO_WRITE,
652 3efd8e31 2022-10-23 thomas ireq.repo_name);
653 3efd8e31 2022-10-23 thomas if (client->repo_write == NULL)
654 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_NOT_GIT_REPO);
657 3efd8e31 2022-10-23 thomas fd = dup(client->fd);
658 3efd8e31 2022-10-23 thomas if (fd == -1)
659 3efd8e31 2022-10-23 thomas return got_error_from_errno("dup");
661 3efd8e31 2022-10-23 thomas proc = get_client_proc(client);
662 c902213d 2022-10-29 thomas if (proc == NULL)
663 c902213d 2022-10-29 thomas fatalx("no process found for uid %d", client->euid);
664 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&proc->iev,
665 3efd8e31 2022-10-23 thomas GOTD_IMSG_LIST_REFS_INTERNAL, PROC_GOTD, fd,
666 3efd8e31 2022-10-23 thomas &ilref, sizeof(ilref)) == -1) {
667 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose WANT");
668 3efd8e31 2022-10-23 thomas close(fd);
669 3efd8e31 2022-10-23 thomas return err;
672 3efd8e31 2022-10-23 thomas return NULL;
675 3efd8e31 2022-10-23 thomas static const struct got_error *
676 3efd8e31 2022-10-23 thomas forward_want(struct gotd_client *client, struct imsg *imsg)
678 3efd8e31 2022-10-23 thomas struct gotd_imsg_want ireq;
679 3efd8e31 2022-10-23 thomas struct gotd_imsg_want iwant;
680 3efd8e31 2022-10-23 thomas size_t datalen;
682 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
683 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireq))
684 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
686 3efd8e31 2022-10-23 thomas memcpy(&ireq, imsg->data, datalen);
688 3efd8e31 2022-10-23 thomas memset(&iwant, 0, sizeof(iwant));
689 3efd8e31 2022-10-23 thomas memcpy(iwant.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
690 3efd8e31 2022-10-23 thomas iwant.client_id = client->id;
692 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev, GOTD_IMSG_WANT,
693 3efd8e31 2022-10-23 thomas PROC_GOTD, -1, &iwant, sizeof(iwant)) == -1)
694 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg compose WANT");
696 3efd8e31 2022-10-23 thomas return NULL;
699 3efd8e31 2022-10-23 thomas static const struct got_error *
700 3efd8e31 2022-10-23 thomas forward_ref_update(struct gotd_client *client, struct imsg *imsg)
702 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
703 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update ireq;
704 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update *iref = NULL;
705 3efd8e31 2022-10-23 thomas size_t datalen;
707 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
708 3efd8e31 2022-10-23 thomas if (datalen < sizeof(ireq))
709 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
710 3efd8e31 2022-10-23 thomas memcpy(&ireq, imsg->data, sizeof(ireq));
711 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireq) + ireq.name_len)
712 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
714 3efd8e31 2022-10-23 thomas iref = malloc(datalen);
715 3efd8e31 2022-10-23 thomas if (iref == NULL)
716 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
717 3efd8e31 2022-10-23 thomas memcpy(iref, imsg->data, datalen);
719 3efd8e31 2022-10-23 thomas iref->client_id = client->id;
720 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
721 3efd8e31 2022-10-23 thomas GOTD_IMSG_REF_UPDATE, PROC_GOTD, -1, iref, datalen) == -1)
722 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose REF_UPDATE");
723 3efd8e31 2022-10-23 thomas free(iref);
724 3efd8e31 2022-10-23 thomas return err;
727 3efd8e31 2022-10-23 thomas static const struct got_error *
728 3efd8e31 2022-10-23 thomas forward_have(struct gotd_client *client, struct imsg *imsg)
730 3efd8e31 2022-10-23 thomas struct gotd_imsg_have ireq;
731 3efd8e31 2022-10-23 thomas struct gotd_imsg_have ihave;
732 3efd8e31 2022-10-23 thomas size_t datalen;
734 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
735 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireq))
736 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
738 3efd8e31 2022-10-23 thomas memcpy(&ireq, imsg->data, datalen);
740 3efd8e31 2022-10-23 thomas memset(&ihave, 0, sizeof(ihave));
741 3efd8e31 2022-10-23 thomas memcpy(ihave.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
742 3efd8e31 2022-10-23 thomas ihave.client_id = client->id;
744 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev, GOTD_IMSG_HAVE,
745 3efd8e31 2022-10-23 thomas PROC_GOTD, -1, &ihave, sizeof(ihave)) == -1)
746 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg compose HAVE");
748 3efd8e31 2022-10-23 thomas return NULL;
751 3efd8e31 2022-10-23 thomas static int
752 3efd8e31 2022-10-23 thomas client_has_capability(struct gotd_client *client, const char *capastr)
754 3efd8e31 2022-10-23 thomas struct gotd_client_capability *capa;
755 3efd8e31 2022-10-23 thomas size_t i;
757 3efd8e31 2022-10-23 thomas if (client->ncapabilities == 0)
758 3efd8e31 2022-10-23 thomas return 0;
760 3efd8e31 2022-10-23 thomas for (i = 0; i < client->ncapabilities; i++) {
761 3efd8e31 2022-10-23 thomas capa = &client->capabilities[i];
762 3efd8e31 2022-10-23 thomas if (strcmp(capa->key, capastr) == 0)
763 3efd8e31 2022-10-23 thomas return 1;
766 3efd8e31 2022-10-23 thomas return 0;
769 3efd8e31 2022-10-23 thomas static const struct got_error *
770 3efd8e31 2022-10-23 thomas recv_capabilities(struct gotd_client *client, struct imsg *imsg)
772 3efd8e31 2022-10-23 thomas struct gotd_imsg_capabilities icapas;
773 3efd8e31 2022-10-23 thomas size_t datalen;
775 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
776 3efd8e31 2022-10-23 thomas if (datalen != sizeof(icapas))
777 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
778 3efd8e31 2022-10-23 thomas memcpy(&icapas, imsg->data, sizeof(icapas));
780 3efd8e31 2022-10-23 thomas client->ncapa_alloc = icapas.ncapabilities;
781 3efd8e31 2022-10-23 thomas client->capabilities = calloc(client->ncapa_alloc,
782 3efd8e31 2022-10-23 thomas sizeof(*client->capabilities));
783 3efd8e31 2022-10-23 thomas if (client->capabilities == NULL) {
784 3efd8e31 2022-10-23 thomas client->ncapa_alloc = 0;
785 3efd8e31 2022-10-23 thomas return got_error_from_errno("calloc");
788 3efd8e31 2022-10-23 thomas log_debug("expecting %zu capabilities from uid %d",
789 3efd8e31 2022-10-23 thomas client->ncapa_alloc, client->euid);
790 3efd8e31 2022-10-23 thomas return NULL;
793 3efd8e31 2022-10-23 thomas static const struct got_error *
794 3efd8e31 2022-10-23 thomas recv_capability(struct gotd_client *client, struct imsg *imsg)
796 3efd8e31 2022-10-23 thomas struct gotd_imsg_capability icapa;
797 3efd8e31 2022-10-23 thomas struct gotd_client_capability *capa;
798 3efd8e31 2022-10-23 thomas size_t datalen;
799 3efd8e31 2022-10-23 thomas char *key, *value = NULL;
801 3efd8e31 2022-10-23 thomas if (client->capabilities == NULL ||
802 3efd8e31 2022-10-23 thomas client->ncapabilities >= client->ncapa_alloc) {
803 3efd8e31 2022-10-23 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
804 3efd8e31 2022-10-23 thomas "unexpected capability received");
807 3efd8e31 2022-10-23 thomas memset(&icapa, 0, sizeof(icapa));
809 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
810 3efd8e31 2022-10-23 thomas if (datalen < sizeof(icapa))
811 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
812 3efd8e31 2022-10-23 thomas memcpy(&icapa, imsg->data, sizeof(icapa));
814 3efd8e31 2022-10-23 thomas if (datalen != sizeof(icapa) + icapa.key_len + icapa.value_len)
815 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
817 3efd8e31 2022-10-23 thomas key = malloc(icapa.key_len + 1);
818 3efd8e31 2022-10-23 thomas if (key == NULL)
819 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
820 3efd8e31 2022-10-23 thomas if (icapa.value_len > 0) {
821 3efd8e31 2022-10-23 thomas value = malloc(icapa.value_len + 1);
822 3efd8e31 2022-10-23 thomas if (value == NULL) {
823 3efd8e31 2022-10-23 thomas free(key);
824 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
828 3efd8e31 2022-10-23 thomas memcpy(key, imsg->data + sizeof(icapa), icapa.key_len);
829 3efd8e31 2022-10-23 thomas key[icapa.key_len] = '\0';
830 3efd8e31 2022-10-23 thomas if (value) {
831 3efd8e31 2022-10-23 thomas memcpy(value, imsg->data + sizeof(icapa) + icapa.key_len,
832 3efd8e31 2022-10-23 thomas icapa.value_len);
833 3efd8e31 2022-10-23 thomas value[icapa.value_len] = '\0';
836 3efd8e31 2022-10-23 thomas capa = &client->capabilities[client->ncapabilities++];
837 3efd8e31 2022-10-23 thomas capa->key = key;
838 3efd8e31 2022-10-23 thomas capa->value = value;
840 3efd8e31 2022-10-23 thomas if (value)
841 3efd8e31 2022-10-23 thomas log_debug("uid %d: capability %s=%s", client->euid, key, value);
843 3efd8e31 2022-10-23 thomas log_debug("uid %d: capability %s", client->euid, key);
845 3efd8e31 2022-10-23 thomas return NULL;
848 3efd8e31 2022-10-23 thomas static const struct got_error *
849 3efd8e31 2022-10-23 thomas send_packfile(struct gotd_client *client)
851 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
852 3efd8e31 2022-10-23 thomas struct gotd_imsg_send_packfile ipack;
853 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_pipe ipipe;
854 3efd8e31 2022-10-23 thomas int pipe[2];
856 3efd8e31 2022-10-23 thomas if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
857 3efd8e31 2022-10-23 thomas return got_error_from_errno("socketpair");
859 3efd8e31 2022-10-23 thomas memset(&ipack, 0, sizeof(ipack));
860 3efd8e31 2022-10-23 thomas memset(&ipipe, 0, sizeof(ipipe));
862 3efd8e31 2022-10-23 thomas ipack.client_id = client->id;
863 3efd8e31 2022-10-23 thomas if (client_has_capability(client, GOT_CAPA_SIDE_BAND_64K))
864 3efd8e31 2022-10-23 thomas ipack.report_progress = 1;
866 3efd8e31 2022-10-23 thomas client->delta_cache_fd = got_opentempfd();
867 3efd8e31 2022-10-23 thomas if (client->delta_cache_fd == -1)
868 3efd8e31 2022-10-23 thomas return got_error_from_errno("got_opentempfd");
870 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev,
871 3efd8e31 2022-10-23 thomas GOTD_IMSG_SEND_PACKFILE, PROC_GOTD, client->delta_cache_fd,
872 3efd8e31 2022-10-23 thomas &ipack, sizeof(ipack)) == -1) {
873 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose SEND_PACKFILE");
874 3efd8e31 2022-10-23 thomas close(pipe[0]);
875 3efd8e31 2022-10-23 thomas close(pipe[1]);
876 3efd8e31 2022-10-23 thomas return err;
879 3efd8e31 2022-10-23 thomas ipipe.client_id = client->id;
881 cc4cc677 2022-10-28 thomas /* Send pack pipe end 0 to repo_read. */
882 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev,
883 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[0],
884 3efd8e31 2022-10-23 thomas &ipipe, sizeof(ipipe)) == -1) {
885 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
886 3efd8e31 2022-10-23 thomas close(pipe[1]);
887 3efd8e31 2022-10-23 thomas return err;
890 cc4cc677 2022-10-28 thomas /* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
891 cc4cc677 2022-10-28 thomas if (gotd_imsg_compose_event(&client->iev,
892 cc4cc677 2022-10-28 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1], NULL, 0) == -1)
893 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
895 3efd8e31 2022-10-23 thomas return err;
898 3efd8e31 2022-10-23 thomas static const struct got_error *
899 3efd8e31 2022-10-23 thomas recv_packfile(struct gotd_client *client)
901 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
902 3efd8e31 2022-10-23 thomas struct gotd_imsg_recv_packfile ipack;
903 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_pipe ipipe;
904 3efd8e31 2022-10-23 thomas struct gotd_imsg_packidx_file ifile;
905 3efd8e31 2022-10-23 thomas char *basepath = NULL, *pack_path = NULL, *idx_path = NULL;
906 3efd8e31 2022-10-23 thomas int packfd = -1, idxfd = -1;
907 3efd8e31 2022-10-23 thomas int pipe[2] = { -1, -1 };
909 3efd8e31 2022-10-23 thomas if (client->packfile_path) {
910 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_PRIVSEP_MSG,
911 3efd8e31 2022-10-23 thomas "uid %d already has a pack file", client->euid);
914 3efd8e31 2022-10-23 thomas if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
915 3efd8e31 2022-10-23 thomas return got_error_from_errno("socketpair");
917 3efd8e31 2022-10-23 thomas memset(&ipipe, 0, sizeof(ipipe));
918 3efd8e31 2022-10-23 thomas ipipe.client_id = client->id;
920 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
921 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[0],
922 3efd8e31 2022-10-23 thomas &ipipe, sizeof(ipipe)) == -1) {
923 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
924 3efd8e31 2022-10-23 thomas pipe[0] = -1;
925 3efd8e31 2022-10-23 thomas goto done;
927 3efd8e31 2022-10-23 thomas pipe[0] = -1;
929 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
930 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1],
931 3efd8e31 2022-10-23 thomas &ipipe, sizeof(ipipe)) == -1)
932 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
933 3efd8e31 2022-10-23 thomas pipe[1] = -1;
935 3efd8e31 2022-10-23 thomas if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.pack",
936 3efd8e31 2022-10-23 thomas client->repo_write->chroot_path, GOT_OBJECTS_PACK_DIR,
937 3efd8e31 2022-10-23 thomas client->euid) == -1) {
938 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
939 3efd8e31 2022-10-23 thomas goto done;
942 fc2a50f2 2022-11-01 thomas err = got_opentemp_named_fd(&pack_path, &packfd, basepath, "");
944 3efd8e31 2022-10-23 thomas goto done;
946 3efd8e31 2022-10-23 thomas free(basepath);
947 3efd8e31 2022-10-23 thomas if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.idx",
948 3efd8e31 2022-10-23 thomas client->repo_write->chroot_path, GOT_OBJECTS_PACK_DIR,
949 3efd8e31 2022-10-23 thomas client->euid) == -1) {
950 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
951 3efd8e31 2022-10-23 thomas basepath = NULL;
952 3efd8e31 2022-10-23 thomas goto done;
954 fc2a50f2 2022-11-01 thomas err = got_opentemp_named_fd(&idx_path, &idxfd, basepath, "");
956 3efd8e31 2022-10-23 thomas goto done;
958 3efd8e31 2022-10-23 thomas memset(&ifile, 0, sizeof(ifile));
959 3efd8e31 2022-10-23 thomas ifile.client_id = client->id;
960 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
961 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKIDX_FILE, PROC_GOTD, idxfd,
962 3efd8e31 2022-10-23 thomas &ifile, sizeof(ifile)) == -1) {
963 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKIDX_FILE");
964 3efd8e31 2022-10-23 thomas idxfd = -1;
965 3efd8e31 2022-10-23 thomas goto done;
967 3efd8e31 2022-10-23 thomas idxfd = -1;
969 3efd8e31 2022-10-23 thomas memset(&ipack, 0, sizeof(ipack));
970 3efd8e31 2022-10-23 thomas ipack.client_id = client->id;
971 3efd8e31 2022-10-23 thomas if (client_has_capability(client, GOT_CAPA_REPORT_STATUS))
972 3efd8e31 2022-10-23 thomas ipack.report_status = 1;
974 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
975 3efd8e31 2022-10-23 thomas GOTD_IMSG_RECV_PACKFILE, PROC_GOTD, packfd,
976 3efd8e31 2022-10-23 thomas &ipack, sizeof(ipack)) == -1) {
977 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose RECV_PACKFILE");
978 3efd8e31 2022-10-23 thomas packfd = -1;
979 3efd8e31 2022-10-23 thomas goto done;
981 3efd8e31 2022-10-23 thomas packfd = -1;
984 3efd8e31 2022-10-23 thomas free(basepath);
985 3efd8e31 2022-10-23 thomas if (pipe[0] != -1 && close(pipe[0]) == -1 && err == NULL)
986 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
987 3efd8e31 2022-10-23 thomas if (pipe[1] != -1 && close(pipe[1]) == -1 && err == NULL)
988 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
989 3efd8e31 2022-10-23 thomas if (packfd != -1 && close(packfd) == -1 && err == NULL)
990 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
991 3efd8e31 2022-10-23 thomas if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
992 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
993 3efd8e31 2022-10-23 thomas if (err) {
994 3efd8e31 2022-10-23 thomas free(pack_path);
995 3efd8e31 2022-10-23 thomas free(idx_path);
997 3efd8e31 2022-10-23 thomas client->packfile_path = pack_path;
998 3efd8e31 2022-10-23 thomas client->packidx_path = idx_path;
1000 3efd8e31 2022-10-23 thomas return err;
1003 3efd8e31 2022-10-23 thomas static void
1004 3efd8e31 2022-10-23 thomas gotd_request(int fd, short events, void *arg)
1006 3efd8e31 2022-10-23 thomas struct gotd_imsgev *iev = arg;
1007 3efd8e31 2022-10-23 thomas struct imsgbuf *ibuf = &iev->ibuf;
1008 3efd8e31 2022-10-23 thomas struct gotd_client *client = iev->handler_arg;
1009 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1010 3efd8e31 2022-10-23 thomas struct imsg imsg;
1011 3efd8e31 2022-10-23 thomas ssize_t n;
1013 3efd8e31 2022-10-23 thomas if (events & EV_WRITE) {
1014 3efd8e31 2022-10-23 thomas while (ibuf->w.queued) {
1015 3efd8e31 2022-10-23 thomas n = msgbuf_write(&ibuf->w);
1016 3efd8e31 2022-10-23 thomas if (n == -1 && errno == EPIPE) {
1018 3efd8e31 2022-10-23 thomas * The client has closed its socket.
1019 3efd8e31 2022-10-23 thomas * This can happen when Git clients are
1020 3efd8e31 2022-10-23 thomas * done sending pack file data.
1022 3efd8e31 2022-10-23 thomas msgbuf_clear(&ibuf->w);
1023 3efd8e31 2022-10-23 thomas continue;
1024 3efd8e31 2022-10-23 thomas } else if (n == -1 && errno != EAGAIN) {
1025 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg_flush");
1026 3efd8e31 2022-10-23 thomas disconnect_on_error(client, err);
1029 3efd8e31 2022-10-23 thomas if (n == 0) {
1030 3efd8e31 2022-10-23 thomas /* Connection closed. */
1031 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_EOF);
1032 3efd8e31 2022-10-23 thomas disconnect_on_error(client, err);
1037 c902213d 2022-10-29 thomas /* Disconnect gotctl(8) now that messages have been sent. */
1038 c902213d 2022-10-29 thomas if (!client_is_reading(client) && !client_is_writing(client)) {
1039 c902213d 2022-10-29 thomas disconnect(client);
1044 3efd8e31 2022-10-23 thomas if ((events & EV_READ) == 0)
1047 3efd8e31 2022-10-23 thomas memset(&imsg, 0, sizeof(imsg));
1049 3efd8e31 2022-10-23 thomas while (err == NULL) {
1050 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv(&imsg, ibuf, 0);
1051 3efd8e31 2022-10-23 thomas if (err) {
1052 3efd8e31 2022-10-23 thomas if (err->code == GOT_ERR_PRIVSEP_READ)
1053 3efd8e31 2022-10-23 thomas err = NULL;
1057 3efd8e31 2022-10-23 thomas evtimer_del(&client->tmo);
1059 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
1060 c902213d 2022-10-29 thomas case GOTD_IMSG_INFO:
1061 c902213d 2022-10-29 thomas err = send_info(client);
1063 c902213d 2022-10-29 thomas case GOTD_IMSG_STOP:
1064 c902213d 2022-10-29 thomas err = stop_gotd(client);
1066 3efd8e31 2022-10-23 thomas case GOTD_IMSG_LIST_REFS:
1067 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_LIST_REFS) {
1068 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1069 3efd8e31 2022-10-23 thomas "unexpected list-refs request received");
1072 3efd8e31 2022-10-23 thomas err = forward_list_refs_request(client, &imsg);
1073 3efd8e31 2022-10-23 thomas if (err)
1075 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_CAPABILITIES;
1076 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting capabilities",
1077 3efd8e31 2022-10-23 thomas client->euid);
1079 3efd8e31 2022-10-23 thomas case GOTD_IMSG_CAPABILITIES:
1080 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1081 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1082 3efd8e31 2022-10-23 thomas "unexpected capabilities received");
1085 3efd8e31 2022-10-23 thomas log_debug("receiving capabilities from uid %d",
1086 3efd8e31 2022-10-23 thomas client->euid);
1087 3efd8e31 2022-10-23 thomas err = recv_capabilities(client, &imsg);
1089 3efd8e31 2022-10-23 thomas case GOTD_IMSG_CAPABILITY:
1090 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1091 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1092 3efd8e31 2022-10-23 thomas "unexpected capability received");
1095 3efd8e31 2022-10-23 thomas err = recv_capability(client, &imsg);
1096 3efd8e31 2022-10-23 thomas if (err || client->ncapabilities < client->ncapa_alloc)
1098 3efd8e31 2022-10-23 thomas if (client_is_reading(client)) {
1099 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_WANT;
1100 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting want-lines",
1101 3efd8e31 2022-10-23 thomas client->euid);
1102 3efd8e31 2022-10-23 thomas } else if (client_is_writing(client)) {
1103 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_REF_UPDATE;
1104 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting ref-update-lines",
1105 3efd8e31 2022-10-23 thomas client->euid);
1107 3efd8e31 2022-10-23 thomas fatalx("client %d is both reading and writing",
1108 3efd8e31 2022-10-23 thomas client->euid);
1110 3efd8e31 2022-10-23 thomas case GOTD_IMSG_WANT:
1111 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_WANT) {
1112 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1113 3efd8e31 2022-10-23 thomas "unexpected want-line received");
1116 3efd8e31 2022-10-23 thomas log_debug("received want-line from uid %d",
1117 3efd8e31 2022-10-23 thomas client->euid);
1118 3efd8e31 2022-10-23 thomas err = ensure_client_is_reading(client);
1119 3efd8e31 2022-10-23 thomas if (err)
1121 3efd8e31 2022-10-23 thomas err = forward_want(client, &imsg);
1123 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATE:
1124 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_REF_UPDATE) {
1125 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1126 3efd8e31 2022-10-23 thomas "unexpected ref-update-line received");
1129 3efd8e31 2022-10-23 thomas log_debug("received ref-update-line from uid %d",
1130 3efd8e31 2022-10-23 thomas client->euid);
1131 3efd8e31 2022-10-23 thomas err = ensure_client_is_writing(client);
1132 3efd8e31 2022-10-23 thomas if (err)
1134 3efd8e31 2022-10-23 thomas err = forward_ref_update(client, &imsg);
1135 3efd8e31 2022-10-23 thomas if (err)
1137 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_MORE_REF_UPDATES;
1139 3efd8e31 2022-10-23 thomas case GOTD_IMSG_HAVE:
1140 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_HAVE) {
1141 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1142 3efd8e31 2022-10-23 thomas "unexpected have-line received");
1145 3efd8e31 2022-10-23 thomas log_debug("received have-line from uid %d",
1146 3efd8e31 2022-10-23 thomas client->euid);
1147 3efd8e31 2022-10-23 thomas err = ensure_client_is_reading(client);
1148 3efd8e31 2022-10-23 thomas if (err)
1150 3efd8e31 2022-10-23 thomas err = forward_have(client, &imsg);
1151 3efd8e31 2022-10-23 thomas if (err)
1154 3efd8e31 2022-10-23 thomas case GOTD_IMSG_FLUSH:
1155 3efd8e31 2022-10-23 thomas if (client->state == GOTD_STATE_EXPECT_WANT ||
1156 3efd8e31 2022-10-23 thomas client->state == GOTD_STATE_EXPECT_HAVE) {
1157 3efd8e31 2022-10-23 thomas err = ensure_client_is_reading(client);
1158 3efd8e31 2022-10-23 thomas if (err)
1160 3efd8e31 2022-10-23 thomas } else if (client->state ==
1161 3efd8e31 2022-10-23 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1162 3efd8e31 2022-10-23 thomas err = ensure_client_is_writing(client);
1163 3efd8e31 2022-10-23 thomas if (err)
1165 3efd8e31 2022-10-23 thomas } else {
1166 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1167 3efd8e31 2022-10-23 thomas "unexpected flush-pkt received");
1170 3efd8e31 2022-10-23 thomas log_debug("received flush-pkt from uid %d",
1171 3efd8e31 2022-10-23 thomas client->euid);
1172 3efd8e31 2022-10-23 thomas if (client->state == GOTD_STATE_EXPECT_WANT) {
1173 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_HAVE;
1174 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting have-lines",
1175 3efd8e31 2022-10-23 thomas client->euid);
1176 3efd8e31 2022-10-23 thomas } else if (client->state == GOTD_STATE_EXPECT_HAVE) {
1177 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_DONE;
1178 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting 'done'",
1179 3efd8e31 2022-10-23 thomas client->euid);
1180 3efd8e31 2022-10-23 thomas } else if (client->state ==
1181 3efd8e31 2022-10-23 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1182 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_PACKFILE;
1183 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting packfile",
1184 3efd8e31 2022-10-23 thomas client->euid);
1185 3efd8e31 2022-10-23 thomas err = recv_packfile(client);
1186 3efd8e31 2022-10-23 thomas } else {
1187 3efd8e31 2022-10-23 thomas /* should not happen, see above */
1188 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1189 3efd8e31 2022-10-23 thomas "unexpected client state");
1193 3efd8e31 2022-10-23 thomas case GOTD_IMSG_DONE:
1194 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_HAVE &&
1195 3efd8e31 2022-10-23 thomas client->state != GOTD_STATE_EXPECT_DONE) {
1196 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1197 3efd8e31 2022-10-23 thomas "unexpected flush-pkt received");
1200 3efd8e31 2022-10-23 thomas log_debug("received 'done' from uid %d", client->euid);
1201 3efd8e31 2022-10-23 thomas err = ensure_client_is_reading(client);
1202 3efd8e31 2022-10-23 thomas if (err)
1204 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_DONE;
1205 3efd8e31 2022-10-23 thomas err = send_packfile(client);
1207 3efd8e31 2022-10-23 thomas default:
1208 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
1212 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1215 3efd8e31 2022-10-23 thomas if (err) {
1216 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_EOF ||
1217 3efd8e31 2022-10-23 thomas client->state != GOTD_STATE_EXPECT_PACKFILE)
1218 3efd8e31 2022-10-23 thomas disconnect_on_error(client, err);
1219 3efd8e31 2022-10-23 thomas } else {
1220 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(&client->iev);
1221 3efd8e31 2022-10-23 thomas evtimer_add(&client->tmo, &timeout);
1225 3efd8e31 2022-10-23 thomas static void
1226 3efd8e31 2022-10-23 thomas gotd_request_timeout(int fd, short events, void *arg)
1228 3efd8e31 2022-10-23 thomas struct gotd_client *client = arg;
1230 3efd8e31 2022-10-23 thomas log_debug("disconnecting uid %d due to timeout", client->euid);
1231 3efd8e31 2022-10-23 thomas disconnect(client);
1234 3efd8e31 2022-10-23 thomas static void
1235 3efd8e31 2022-10-23 thomas gotd_accept(int fd, short event, void *arg)
1237 3efd8e31 2022-10-23 thomas struct sockaddr_storage ss;
1238 3efd8e31 2022-10-23 thomas struct timeval backoff;
1239 3efd8e31 2022-10-23 thomas socklen_t len;
1240 3efd8e31 2022-10-23 thomas int s = -1;
1241 3efd8e31 2022-10-23 thomas struct gotd_client *client = NULL;
1242 3efd8e31 2022-10-23 thomas uid_t euid;
1243 3efd8e31 2022-10-23 thomas gid_t egid;
1245 3efd8e31 2022-10-23 thomas backoff.tv_sec = 1;
1246 3efd8e31 2022-10-23 thomas backoff.tv_usec = 0;
1248 3efd8e31 2022-10-23 thomas if (event_add(&gotd.ev, NULL) == -1) {
1249 3efd8e31 2022-10-23 thomas log_warn("event_add");
1252 3efd8e31 2022-10-23 thomas if (event & EV_TIMEOUT)
1255 3efd8e31 2022-10-23 thomas len = sizeof(ss);
1257 3efd8e31 2022-10-23 thomas s = accept_reserve(fd, (struct sockaddr *)&ss, &len, GOTD_FD_RESERVE,
1258 3efd8e31 2022-10-23 thomas &inflight);
1260 3efd8e31 2022-10-23 thomas if (s == -1) {
1261 3efd8e31 2022-10-23 thomas switch (errno) {
1262 3efd8e31 2022-10-23 thomas case EINTR:
1263 3efd8e31 2022-10-23 thomas case EWOULDBLOCK:
1264 3efd8e31 2022-10-23 thomas case ECONNABORTED:
1266 3efd8e31 2022-10-23 thomas case EMFILE:
1267 3efd8e31 2022-10-23 thomas case ENFILE:
1268 3efd8e31 2022-10-23 thomas event_del(&gotd.ev);
1269 3efd8e31 2022-10-23 thomas evtimer_add(&gotd.pause, &backoff);
1271 3efd8e31 2022-10-23 thomas default:
1272 3efd8e31 2022-10-23 thomas log_warn("%s: accept", __func__);
1277 3efd8e31 2022-10-23 thomas if (client_cnt >= GOTD_MAXCLIENTS)
1278 3efd8e31 2022-10-23 thomas goto err;
1280 3efd8e31 2022-10-23 thomas if (getpeereid(s, &euid, &egid) == -1) {
1281 3efd8e31 2022-10-23 thomas log_warn("%s: getpeereid", __func__);
1282 3efd8e31 2022-10-23 thomas goto err;
1285 3efd8e31 2022-10-23 thomas client = calloc(1, sizeof(*client));
1286 3efd8e31 2022-10-23 thomas if (client == NULL) {
1287 3efd8e31 2022-10-23 thomas log_warn("%s: calloc", __func__);
1288 3efd8e31 2022-10-23 thomas goto err;
1291 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_LIST_REFS;
1292 3efd8e31 2022-10-23 thomas client->id = get_client_id();
1293 3efd8e31 2022-10-23 thomas client->fd = s;
1295 3efd8e31 2022-10-23 thomas client->delta_cache_fd = -1;
1296 3efd8e31 2022-10-23 thomas client->euid = euid;
1297 3efd8e31 2022-10-23 thomas client->egid = egid;
1298 3efd8e31 2022-10-23 thomas client->nref_updates = -1;
1300 3efd8e31 2022-10-23 thomas imsg_init(&client->iev.ibuf, client->fd);
1301 3efd8e31 2022-10-23 thomas client->iev.handler = gotd_request;
1302 3efd8e31 2022-10-23 thomas client->iev.events = EV_READ;
1303 3efd8e31 2022-10-23 thomas client->iev.handler_arg = client;
1305 3efd8e31 2022-10-23 thomas event_set(&client->iev.ev, client->fd, EV_READ, gotd_request,
1306 3efd8e31 2022-10-23 thomas &client->iev);
1307 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(&client->iev);
1309 3efd8e31 2022-10-23 thomas evtimer_set(&client->tmo, gotd_request_timeout, client);
1311 3efd8e31 2022-10-23 thomas add_client(client);
1312 3efd8e31 2022-10-23 thomas log_debug("%s: new client uid %d connected on fd %d", __func__,
1313 3efd8e31 2022-10-23 thomas client->euid, client->fd);
1316 3efd8e31 2022-10-23 thomas inflight--;
1317 3efd8e31 2022-10-23 thomas if (s != -1)
1318 3efd8e31 2022-10-23 thomas close(s);
1319 3efd8e31 2022-10-23 thomas free(client);
1322 3efd8e31 2022-10-23 thomas static void
1323 3efd8e31 2022-10-23 thomas gotd_accept_paused(int fd, short event, void *arg)
1325 3efd8e31 2022-10-23 thomas event_add(&gotd.ev, NULL);
1328 3efd8e31 2022-10-23 thomas static const char *gotd_proc_names[PROC_MAX] = {
1329 3efd8e31 2022-10-23 thomas "parent",
1330 3efd8e31 2022-10-23 thomas "repo_read",
1331 3efd8e31 2022-10-23 thomas "repo_write"
1334 3efd8e31 2022-10-23 thomas static struct gotd_child_proc *
1335 3efd8e31 2022-10-23 thomas get_proc_for_pid(pid_t pid)
1337 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
1340 3efd8e31 2022-10-23 thomas for (i = 0; i < gotd.nprocs; i++) {
1341 3efd8e31 2022-10-23 thomas proc = &gotd.procs[i];
1342 3efd8e31 2022-10-23 thomas if (proc->pid == pid)
1343 3efd8e31 2022-10-23 thomas return proc;
1346 3efd8e31 2022-10-23 thomas return NULL;
1349 3efd8e31 2022-10-23 thomas static void
1350 3efd8e31 2022-10-23 thomas kill_proc(struct gotd_child_proc *proc, int fatal)
1352 3efd8e31 2022-10-23 thomas if (fatal) {
1353 3efd8e31 2022-10-23 thomas log_warnx("sending SIGKILL to PID %d", proc->pid);
1354 3efd8e31 2022-10-23 thomas kill(proc->pid, SIGKILL);
1356 3efd8e31 2022-10-23 thomas kill(proc->pid, SIGTERM);
1359 3efd8e31 2022-10-23 thomas static void
1360 3efd8e31 2022-10-23 thomas gotd_shutdown(void)
1362 3efd8e31 2022-10-23 thomas pid_t pid;
1363 3efd8e31 2022-10-23 thomas int status, i;
1364 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
1366 3efd8e31 2022-10-23 thomas for (i = 0; i < gotd.nprocs; i++) {
1367 3efd8e31 2022-10-23 thomas proc = &gotd.procs[i];
1368 3efd8e31 2022-10-23 thomas msgbuf_clear(&proc->iev.ibuf.w);
1369 3efd8e31 2022-10-23 thomas close(proc->iev.ibuf.fd);
1370 3efd8e31 2022-10-23 thomas kill_proc(proc, 0);
1373 3efd8e31 2022-10-23 thomas log_debug("waiting for children to terminate");
1375 3efd8e31 2022-10-23 thomas pid = wait(&status);
1376 3efd8e31 2022-10-23 thomas if (pid == -1) {
1377 3efd8e31 2022-10-23 thomas if (errno != EINTR && errno != ECHILD)
1378 3efd8e31 2022-10-23 thomas fatal("wait");
1379 3efd8e31 2022-10-23 thomas } else if (WIFSIGNALED(status)) {
1380 3efd8e31 2022-10-23 thomas proc = get_proc_for_pid(pid);
1381 3efd8e31 2022-10-23 thomas log_warnx("%s %s child process terminated; signal %d",
1382 3efd8e31 2022-10-23 thomas proc ? gotd_proc_names[proc->type] : "",
1383 3efd8e31 2022-10-23 thomas proc ? proc->chroot_path : "", WTERMSIG(status));
1385 3efd8e31 2022-10-23 thomas } while (pid != -1 || (pid == -1 && errno == EINTR));
1387 3efd8e31 2022-10-23 thomas log_info("terminating");
1388 3efd8e31 2022-10-23 thomas exit(0);
1392 3efd8e31 2022-10-23 thomas gotd_sighdlr(int sig, short event, void *arg)
1395 3efd8e31 2022-10-23 thomas * Normal signal handler rules don't apply because libevent
1396 3efd8e31 2022-10-23 thomas * decouples for us.
1399 3efd8e31 2022-10-23 thomas switch (sig) {
1400 3efd8e31 2022-10-23 thomas case SIGHUP:
1401 3efd8e31 2022-10-23 thomas log_info("%s: ignoring SIGHUP", __func__);
1403 3efd8e31 2022-10-23 thomas case SIGUSR1:
1404 3efd8e31 2022-10-23 thomas log_info("%s: ignoring SIGUSR1", __func__);
1406 3efd8e31 2022-10-23 thomas case SIGTERM:
1407 3efd8e31 2022-10-23 thomas case SIGINT:
1408 3efd8e31 2022-10-23 thomas gotd_shutdown();
1409 3efd8e31 2022-10-23 thomas log_warnx("gotd terminating");
1410 3efd8e31 2022-10-23 thomas exit(0);
1412 3efd8e31 2022-10-23 thomas default:
1413 3efd8e31 2022-10-23 thomas fatalx("unexpected signal");
1417 3efd8e31 2022-10-23 thomas static const struct got_error *
1418 3efd8e31 2022-10-23 thomas ensure_proc_is_reading(struct gotd_client *client,
1419 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc)
1421 3efd8e31 2022-10-23 thomas if (!client_is_reading(client)) {
1422 3efd8e31 2022-10-23 thomas kill_proc(proc, 1);
1423 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
1424 3efd8e31 2022-10-23 thomas "PID %d handled a read-request for uid %d but this "
1425 3efd8e31 2022-10-23 thomas "user is not reading from a repository", proc->pid,
1426 3efd8e31 2022-10-23 thomas client->euid);
1429 3efd8e31 2022-10-23 thomas return NULL;
1432 3efd8e31 2022-10-23 thomas static const struct got_error *
1433 3efd8e31 2022-10-23 thomas ensure_proc_is_writing(struct gotd_client *client,
1434 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc)
1436 3efd8e31 2022-10-23 thomas if (!client_is_writing(client)) {
1437 3efd8e31 2022-10-23 thomas kill_proc(proc, 1);
1438 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
1439 3efd8e31 2022-10-23 thomas "PID %d handled a write-request for uid %d but this "
1440 3efd8e31 2022-10-23 thomas "user is not writing to a repository", proc->pid,
1441 3efd8e31 2022-10-23 thomas client->euid);
1444 3efd8e31 2022-10-23 thomas return NULL;
1447 3efd8e31 2022-10-23 thomas static int
1448 3efd8e31 2022-10-23 thomas verify_imsg_src(struct gotd_client *client, struct gotd_child_proc *proc,
1449 3efd8e31 2022-10-23 thomas struct imsg *imsg)
1451 3efd8e31 2022-10-23 thomas const struct got_error *err;
1452 3efd8e31 2022-10-23 thomas struct gotd_child_proc *client_proc;
1453 3efd8e31 2022-10-23 thomas int ret = 0;
1455 3efd8e31 2022-10-23 thomas client_proc = get_client_proc(client);
1456 c902213d 2022-10-29 thomas if (client_proc == NULL)
1457 c902213d 2022-10-29 thomas fatalx("no process found for uid %d", client->euid);
1459 3efd8e31 2022-10-23 thomas if (proc->pid != client_proc->pid) {
1460 3efd8e31 2022-10-23 thomas kill_proc(proc, 1);
1461 3efd8e31 2022-10-23 thomas log_warnx("received message from PID %d for uid %d, while "
1462 3efd8e31 2022-10-23 thomas "PID %d is the process serving this user",
1463 3efd8e31 2022-10-23 thomas proc->pid, client->euid, client_proc->pid);
1464 3efd8e31 2022-10-23 thomas return 0;
1467 3efd8e31 2022-10-23 thomas switch (imsg->hdr.type) {
1468 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
1469 3efd8e31 2022-10-23 thomas ret = 1;
1471 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_DONE:
1472 3efd8e31 2022-10-23 thomas err = ensure_proc_is_reading(client, proc);
1473 3efd8e31 2022-10-23 thomas if (err)
1474 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1476 3efd8e31 2022-10-23 thomas ret = 1;
1478 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_INSTALL:
1479 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATES_START:
1480 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATE:
1481 3efd8e31 2022-10-23 thomas err = ensure_proc_is_writing(client, proc);
1482 3efd8e31 2022-10-23 thomas if (err)
1483 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1485 3efd8e31 2022-10-23 thomas ret = 1;
1487 3efd8e31 2022-10-23 thomas default:
1488 3efd8e31 2022-10-23 thomas log_debug("%s: unexpected imsg %d", __func__, imsg->hdr.type);
1492 3efd8e31 2022-10-23 thomas return ret;
1495 3efd8e31 2022-10-23 thomas static const struct got_error *
1496 3efd8e31 2022-10-23 thomas recv_packfile_done(uint32_t *client_id, struct imsg *imsg)
1498 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_done idone;
1499 3efd8e31 2022-10-23 thomas size_t datalen;
1501 3efd8e31 2022-10-23 thomas log_debug("packfile-done received");
1503 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1504 3efd8e31 2022-10-23 thomas if (datalen != sizeof(idone))
1505 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1506 3efd8e31 2022-10-23 thomas memcpy(&idone, imsg->data, sizeof(idone));
1508 3efd8e31 2022-10-23 thomas *client_id = idone.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_packfile_install(uint32_t *client_id, struct imsg *imsg)
1515 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_install inst;
1516 3efd8e31 2022-10-23 thomas size_t datalen;
1518 3efd8e31 2022-10-23 thomas log_debug("packfile-install received");
1520 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1521 3efd8e31 2022-10-23 thomas if (datalen != sizeof(inst))
1522 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1523 3efd8e31 2022-10-23 thomas memcpy(&inst, imsg->data, sizeof(inst));
1525 3efd8e31 2022-10-23 thomas *client_id = inst.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 recv_ref_updates_start(uint32_t *client_id, struct imsg *imsg)
1532 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_updates_start istart;
1533 3efd8e31 2022-10-23 thomas size_t datalen;
1535 3efd8e31 2022-10-23 thomas log_debug("ref-updates-start received");
1537 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1538 3efd8e31 2022-10-23 thomas if (datalen != sizeof(istart))
1539 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1540 3efd8e31 2022-10-23 thomas memcpy(&istart, imsg->data, sizeof(istart));
1542 3efd8e31 2022-10-23 thomas *client_id = istart.client_id;
1543 3efd8e31 2022-10-23 thomas return NULL;
1546 3efd8e31 2022-10-23 thomas static const struct got_error *
1547 3efd8e31 2022-10-23 thomas recv_ref_update(uint32_t *client_id, struct imsg *imsg)
1549 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update iref;
1550 3efd8e31 2022-10-23 thomas size_t datalen;
1552 3efd8e31 2022-10-23 thomas log_debug("ref-update received");
1554 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1555 3efd8e31 2022-10-23 thomas if (datalen < sizeof(iref))
1556 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1557 3efd8e31 2022-10-23 thomas memcpy(&iref, imsg->data, sizeof(iref));
1559 3efd8e31 2022-10-23 thomas *client_id = iref.client_id;
1560 3efd8e31 2022-10-23 thomas return NULL;
1563 3efd8e31 2022-10-23 thomas static const struct got_error *
1564 3efd8e31 2022-10-23 thomas send_ref_update_ok(struct gotd_client *client,
1565 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update *iref, const char *refname)
1567 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update_ok iok;
1568 3efd8e31 2022-10-23 thomas struct ibuf *wbuf;
1569 3efd8e31 2022-10-23 thomas size_t len;
1571 3efd8e31 2022-10-23 thomas memset(&iok, 0, sizeof(iok));
1572 3efd8e31 2022-10-23 thomas iok.client_id = client->id;
1573 3efd8e31 2022-10-23 thomas memcpy(iok.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
1574 3efd8e31 2022-10-23 thomas memcpy(iok.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
1575 3efd8e31 2022-10-23 thomas iok.name_len = strlen(refname);
1577 3efd8e31 2022-10-23 thomas len = sizeof(iok) + iok.name_len;
1578 3efd8e31 2022-10-23 thomas wbuf = imsg_create(&client->iev.ibuf, GOTD_IMSG_REF_UPDATE_OK,
1579 3efd8e31 2022-10-23 thomas PROC_GOTD, gotd.pid, len);
1580 3efd8e31 2022-10-23 thomas if (wbuf == NULL)
1581 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_create REF_UPDATE_OK");
1583 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, &iok, sizeof(iok)) == -1)
1584 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_OK");
1585 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, refname, iok.name_len) == -1)
1586 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_OK");
1588 3efd8e31 2022-10-23 thomas wbuf->fd = -1;
1589 3efd8e31 2022-10-23 thomas imsg_close(&client->iev.ibuf, wbuf);
1590 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(&client->iev);
1591 3efd8e31 2022-10-23 thomas return NULL;
1594 3efd8e31 2022-10-23 thomas static void
1595 3efd8e31 2022-10-23 thomas send_refs_updated(struct gotd_client *client)
1597 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->iev,
1598 3efd8e31 2022-10-23 thomas GOTD_IMSG_REFS_UPDATED, PROC_GOTD, -1, NULL, 0) == -1)
1599 3efd8e31 2022-10-23 thomas log_warn("imsg compose REFS_UPDATED");
1602 3efd8e31 2022-10-23 thomas static const struct got_error *
1603 3efd8e31 2022-10-23 thomas send_ref_update_ng(struct gotd_client *client,
1604 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update *iref, const char *refname,
1605 3efd8e31 2022-10-23 thomas const char *reason)
1607 3efd8e31 2022-10-23 thomas const struct got_error *ng_err;
1608 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update_ng ing;
1609 3efd8e31 2022-10-23 thomas struct ibuf *wbuf;
1610 3efd8e31 2022-10-23 thomas size_t len;
1612 3efd8e31 2022-10-23 thomas memset(&ing, 0, sizeof(ing));
1613 3efd8e31 2022-10-23 thomas ing.client_id = client->id;
1614 3efd8e31 2022-10-23 thomas memcpy(ing.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
1615 3efd8e31 2022-10-23 thomas memcpy(ing.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
1616 3efd8e31 2022-10-23 thomas ing.name_len = strlen(refname);
1618 3efd8e31 2022-10-23 thomas ng_err = got_error_fmt(GOT_ERR_REF_BUSY, "%s", reason);
1619 3efd8e31 2022-10-23 thomas ing.reason_len = strlen(ng_err->msg);
1621 3efd8e31 2022-10-23 thomas len = sizeof(ing) + ing.name_len + ing.reason_len;
1622 3efd8e31 2022-10-23 thomas wbuf = imsg_create(&client->iev.ibuf, GOTD_IMSG_REF_UPDATE_NG,
1623 3efd8e31 2022-10-23 thomas PROC_GOTD, gotd.pid, len);
1624 3efd8e31 2022-10-23 thomas if (wbuf == NULL)
1625 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_create REF_UPDATE_NG");
1627 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, &ing, sizeof(ing)) == -1)
1628 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
1629 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, refname, ing.name_len) == -1)
1630 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
1631 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, ng_err->msg, ing.reason_len) == -1)
1632 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
1634 3efd8e31 2022-10-23 thomas wbuf->fd = -1;
1635 3efd8e31 2022-10-23 thomas imsg_close(&client->iev.ibuf, wbuf);
1636 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(&client->iev);
1637 3efd8e31 2022-10-23 thomas return NULL;
1640 3efd8e31 2022-10-23 thomas static const struct got_error *
1641 3efd8e31 2022-10-23 thomas install_pack(struct gotd_client *client, const char *repo_path,
1642 3efd8e31 2022-10-23 thomas struct imsg *imsg)
1644 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1645 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_install inst;
1646 3efd8e31 2022-10-23 thomas char hex[SHA1_DIGEST_STRING_LENGTH];
1647 3efd8e31 2022-10-23 thomas size_t datalen;
1648 3efd8e31 2022-10-23 thomas char *packfile_path = NULL, *packidx_path = NULL;
1650 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1651 3efd8e31 2022-10-23 thomas if (datalen != sizeof(inst))
1652 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1653 3efd8e31 2022-10-23 thomas memcpy(&inst, imsg->data, sizeof(inst));
1655 3efd8e31 2022-10-23 thomas if (client->packfile_path == NULL)
1656 3efd8e31 2022-10-23 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
1657 3efd8e31 2022-10-23 thomas "client has no pack file");
1658 3efd8e31 2022-10-23 thomas if (client->packidx_path == NULL)
1659 3efd8e31 2022-10-23 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
1660 3efd8e31 2022-10-23 thomas "client has no pack file index");
1662 3efd8e31 2022-10-23 thomas if (got_sha1_digest_to_str(inst.pack_sha1, hex, sizeof(hex)) == NULL)
1663 3efd8e31 2022-10-23 thomas return got_error_msg(GOT_ERR_NO_SPACE,
1664 3efd8e31 2022-10-23 thomas "could not convert pack file SHA1 to hex");
1666 3efd8e31 2022-10-23 thomas if (asprintf(&packfile_path, "/%s/%s/pack-%s.pack",
1667 3efd8e31 2022-10-23 thomas repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
1668 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
1669 3efd8e31 2022-10-23 thomas goto done;
1672 3efd8e31 2022-10-23 thomas if (asprintf(&packidx_path, "/%s/%s/pack-%s.idx",
1673 3efd8e31 2022-10-23 thomas repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
1674 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
1675 3efd8e31 2022-10-23 thomas goto done;
1678 3efd8e31 2022-10-23 thomas if (rename(client->packfile_path, packfile_path) == -1) {
1679 3efd8e31 2022-10-23 thomas err = got_error_from_errno3("rename", client->packfile_path,
1680 3efd8e31 2022-10-23 thomas packfile_path);
1681 3efd8e31 2022-10-23 thomas goto done;
1684 3efd8e31 2022-10-23 thomas free(client->packfile_path);
1685 3efd8e31 2022-10-23 thomas client->packfile_path = NULL;
1687 3efd8e31 2022-10-23 thomas if (rename(client->packidx_path, packidx_path) == -1) {
1688 3efd8e31 2022-10-23 thomas err = got_error_from_errno3("rename", client->packidx_path,
1689 3efd8e31 2022-10-23 thomas packidx_path);
1690 3efd8e31 2022-10-23 thomas goto done;
1693 3efd8e31 2022-10-23 thomas free(client->packidx_path);
1694 3efd8e31 2022-10-23 thomas client->packidx_path = NULL;
1696 3efd8e31 2022-10-23 thomas free(packfile_path);
1697 3efd8e31 2022-10-23 thomas free(packidx_path);
1698 3efd8e31 2022-10-23 thomas return err;
1701 3efd8e31 2022-10-23 thomas static const struct got_error *
1702 3efd8e31 2022-10-23 thomas begin_ref_updates(struct gotd_client *client, struct imsg *imsg)
1704 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_updates_start istart;
1705 3efd8e31 2022-10-23 thomas size_t datalen;
1707 3efd8e31 2022-10-23 thomas if (client->nref_updates != -1)
1708 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1710 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1711 3efd8e31 2022-10-23 thomas if (datalen != sizeof(istart))
1712 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1713 3efd8e31 2022-10-23 thomas memcpy(&istart, imsg->data, sizeof(istart));
1715 3efd8e31 2022-10-23 thomas if (istart.nref_updates <= 0)
1716 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1718 3efd8e31 2022-10-23 thomas client->nref_updates = istart.nref_updates;
1719 3efd8e31 2022-10-23 thomas return NULL;
1722 3efd8e31 2022-10-23 thomas static const struct got_error *
1723 3efd8e31 2022-10-23 thomas update_ref(struct gotd_client *client, const char *repo_path,
1724 3efd8e31 2022-10-23 thomas struct imsg *imsg)
1726 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1727 3efd8e31 2022-10-23 thomas struct got_repository *repo = NULL;
1728 3efd8e31 2022-10-23 thomas struct got_reference *ref = NULL;
1729 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update iref;
1730 3efd8e31 2022-10-23 thomas struct got_object_id old_id, new_id;
1731 3efd8e31 2022-10-23 thomas struct got_object_id *id = NULL;
1732 3efd8e31 2022-10-23 thomas struct got_object *obj = NULL;
1733 3efd8e31 2022-10-23 thomas char *refname = NULL;
1734 3efd8e31 2022-10-23 thomas size_t datalen;
1735 3efd8e31 2022-10-23 thomas int locked = 0;
1737 3efd8e31 2022-10-23 thomas log_debug("update-ref from uid %d", client->euid);
1739 3efd8e31 2022-10-23 thomas if (client->nref_updates <= 0)
1740 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1742 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1743 3efd8e31 2022-10-23 thomas if (datalen < sizeof(iref))
1744 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1745 3efd8e31 2022-10-23 thomas memcpy(&iref, imsg->data, sizeof(iref));
1746 3efd8e31 2022-10-23 thomas if (datalen != sizeof(iref) + iref.name_len)
1747 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1748 3efd8e31 2022-10-23 thomas refname = malloc(iref.name_len + 1);
1749 3efd8e31 2022-10-23 thomas if (refname == NULL)
1750 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
1751 3efd8e31 2022-10-23 thomas memcpy(refname, imsg->data + sizeof(iref), iref.name_len);
1752 3efd8e31 2022-10-23 thomas refname[iref.name_len] = '\0';
1754 3efd8e31 2022-10-23 thomas log_debug("updating ref %s for uid %d", refname, client->euid);
1756 3efd8e31 2022-10-23 thomas err = got_repo_open(&repo, repo_path, NULL, NULL);
1757 3efd8e31 2022-10-23 thomas if (err)
1758 3efd8e31 2022-10-23 thomas goto done;
1760 3efd8e31 2022-10-23 thomas memcpy(old_id.sha1, iref.old_id, SHA1_DIGEST_LENGTH);
1761 3efd8e31 2022-10-23 thomas memcpy(new_id.sha1, iref.new_id, SHA1_DIGEST_LENGTH);
1762 3efd8e31 2022-10-23 thomas err = got_object_open(&obj, repo, &new_id);
1763 3efd8e31 2022-10-23 thomas if (err)
1764 3efd8e31 2022-10-23 thomas goto done;
1766 3efd8e31 2022-10-23 thomas if (iref.ref_is_new) {
1767 3efd8e31 2022-10-23 thomas err = got_ref_open(&ref, repo, refname, 0);
1768 3efd8e31 2022-10-23 thomas if (err) {
1769 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_NOT_REF)
1770 3efd8e31 2022-10-23 thomas goto done;
1771 3efd8e31 2022-10-23 thomas err = got_ref_alloc(&ref, refname, &new_id);
1772 3efd8e31 2022-10-23 thomas if (err)
1773 3efd8e31 2022-10-23 thomas goto done;
1774 3efd8e31 2022-10-23 thomas err = got_ref_write(ref, repo); /* will lock/unlock */
1775 3efd8e31 2022-10-23 thomas if (err)
1776 3efd8e31 2022-10-23 thomas goto done;
1777 3efd8e31 2022-10-23 thomas } else {
1778 3efd8e31 2022-10-23 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
1779 3efd8e31 2022-10-23 thomas "%s has been created by someone else "
1780 3efd8e31 2022-10-23 thomas "while transaction was in progress",
1781 3efd8e31 2022-10-23 thomas got_ref_get_name(ref));
1782 3efd8e31 2022-10-23 thomas goto done;
1784 3efd8e31 2022-10-23 thomas } else {
1785 3efd8e31 2022-10-23 thomas err = got_ref_open(&ref, repo, refname, 1 /* lock */);
1786 3efd8e31 2022-10-23 thomas if (err)
1787 3efd8e31 2022-10-23 thomas goto done;
1788 3efd8e31 2022-10-23 thomas locked = 1;
1790 3efd8e31 2022-10-23 thomas err = got_ref_resolve(&id, repo, ref);
1791 3efd8e31 2022-10-23 thomas if (err)
1792 3efd8e31 2022-10-23 thomas goto done;
1794 3efd8e31 2022-10-23 thomas if (got_object_id_cmp(id, &old_id) != 0) {
1795 3efd8e31 2022-10-23 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
1796 3efd8e31 2022-10-23 thomas "%s has been modified by someone else "
1797 3efd8e31 2022-10-23 thomas "while transaction was in progress",
1798 3efd8e31 2022-10-23 thomas got_ref_get_name(ref));
1799 3efd8e31 2022-10-23 thomas goto done;
1802 3efd8e31 2022-10-23 thomas err = got_ref_change_ref(ref, &new_id);
1803 3efd8e31 2022-10-23 thomas if (err)
1804 3efd8e31 2022-10-23 thomas goto done;
1806 3efd8e31 2022-10-23 thomas err = got_ref_write(ref, repo);
1807 3efd8e31 2022-10-23 thomas if (err)
1808 3efd8e31 2022-10-23 thomas goto done;
1810 3efd8e31 2022-10-23 thomas free(id);
1811 3efd8e31 2022-10-23 thomas id = NULL;
1814 3efd8e31 2022-10-23 thomas if (err) {
1815 3efd8e31 2022-10-23 thomas if (err->code == GOT_ERR_LOCKFILE_TIMEOUT) {
1816 3efd8e31 2022-10-23 thomas err = got_error_fmt(GOT_ERR_LOCKFILE_TIMEOUT,
1817 3efd8e31 2022-10-23 thomas "could not acquire exclusive file lock for %s",
1818 3efd8e31 2022-10-23 thomas refname);
1820 3efd8e31 2022-10-23 thomas send_ref_update_ng(client, &iref, refname, err->msg);
1822 3efd8e31 2022-10-23 thomas send_ref_update_ok(client, &iref, refname);
1824 3efd8e31 2022-10-23 thomas if (client->nref_updates > 0) {
1825 3efd8e31 2022-10-23 thomas client->nref_updates--;
1826 3efd8e31 2022-10-23 thomas if (client->nref_updates == 0)
1827 3efd8e31 2022-10-23 thomas send_refs_updated(client);
1830 3efd8e31 2022-10-23 thomas if (locked) {
1831 3efd8e31 2022-10-23 thomas const struct got_error *unlock_err;
1832 3efd8e31 2022-10-23 thomas unlock_err = got_ref_unlock(ref);
1833 3efd8e31 2022-10-23 thomas if (unlock_err && err == NULL)
1834 3efd8e31 2022-10-23 thomas err = unlock_err;
1836 3efd8e31 2022-10-23 thomas if (ref)
1837 3efd8e31 2022-10-23 thomas got_ref_close(ref);
1838 3efd8e31 2022-10-23 thomas if (obj)
1839 3efd8e31 2022-10-23 thomas got_object_close(obj);
1840 3efd8e31 2022-10-23 thomas if (repo)
1841 3efd8e31 2022-10-23 thomas got_repo_close(repo);
1842 3efd8e31 2022-10-23 thomas free(refname);
1843 3efd8e31 2022-10-23 thomas free(id);
1844 3efd8e31 2022-10-23 thomas return err;
1847 3efd8e31 2022-10-23 thomas static void
1848 3efd8e31 2022-10-23 thomas gotd_dispatch(int fd, short event, void *arg)
1850 3efd8e31 2022-10-23 thomas struct gotd_imsgev *iev = arg;
1851 3efd8e31 2022-10-23 thomas struct imsgbuf *ibuf = &iev->ibuf;
1852 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc = NULL;
1853 3efd8e31 2022-10-23 thomas ssize_t n;
1854 3efd8e31 2022-10-23 thomas int shut = 0;
1855 3efd8e31 2022-10-23 thomas struct imsg imsg;
1857 3efd8e31 2022-10-23 thomas if (event & EV_READ) {
1858 3efd8e31 2022-10-23 thomas if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1859 3efd8e31 2022-10-23 thomas fatal("imsg_read error");
1860 3efd8e31 2022-10-23 thomas if (n == 0) {
1861 3efd8e31 2022-10-23 thomas /* Connection closed. */
1862 3efd8e31 2022-10-23 thomas shut = 1;
1863 3efd8e31 2022-10-23 thomas goto done;
1867 3efd8e31 2022-10-23 thomas if (event & EV_WRITE) {
1868 3efd8e31 2022-10-23 thomas n = msgbuf_write(&ibuf->w);
1869 3efd8e31 2022-10-23 thomas if (n == -1 && errno != EAGAIN)
1870 3efd8e31 2022-10-23 thomas fatal("msgbuf_write");
1871 3efd8e31 2022-10-23 thomas if (n == 0) {
1872 3efd8e31 2022-10-23 thomas /* Connection closed. */
1873 3efd8e31 2022-10-23 thomas shut = 1;
1874 3efd8e31 2022-10-23 thomas goto done;
1878 3efd8e31 2022-10-23 thomas proc = find_proc_by_fd(fd);
1879 3efd8e31 2022-10-23 thomas if (proc == NULL)
1880 3efd8e31 2022-10-23 thomas fatalx("cannot find child process for fd %d", fd);
1882 3efd8e31 2022-10-23 thomas for (;;) {
1883 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1884 3efd8e31 2022-10-23 thomas struct gotd_client *client = NULL;
1885 3efd8e31 2022-10-23 thomas uint32_t client_id = 0;
1886 3efd8e31 2022-10-23 thomas int do_disconnect = 0;
1887 3efd8e31 2022-10-23 thomas int do_ref_updates = 0, do_ref_update = 0;
1888 3efd8e31 2022-10-23 thomas int do_packfile_install = 0;
1890 3efd8e31 2022-10-23 thomas if ((n = imsg_get(ibuf, &imsg)) == -1)
1891 3efd8e31 2022-10-23 thomas fatal("%s: imsg_get error", __func__);
1892 3efd8e31 2022-10-23 thomas if (n == 0) /* No more messages. */
1895 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
1896 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
1897 3efd8e31 2022-10-23 thomas do_disconnect = 1;
1898 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(&client_id, &imsg);
1900 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_DONE:
1901 3efd8e31 2022-10-23 thomas do_disconnect = 1;
1902 3efd8e31 2022-10-23 thomas err = recv_packfile_done(&client_id, &imsg);
1904 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_INSTALL:
1905 3efd8e31 2022-10-23 thomas err = recv_packfile_install(&client_id, &imsg);
1906 3efd8e31 2022-10-23 thomas if (err == NULL)
1907 3efd8e31 2022-10-23 thomas do_packfile_install = 1;
1909 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATES_START:
1910 3efd8e31 2022-10-23 thomas err = recv_ref_updates_start(&client_id, &imsg);
1911 3efd8e31 2022-10-23 thomas if (err == NULL)
1912 3efd8e31 2022-10-23 thomas do_ref_updates = 1;
1914 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATE:
1915 3efd8e31 2022-10-23 thomas err = recv_ref_update(&client_id, &imsg);
1916 3efd8e31 2022-10-23 thomas if (err == NULL)
1917 3efd8e31 2022-10-23 thomas do_ref_update = 1;
1919 3efd8e31 2022-10-23 thomas default:
1920 3efd8e31 2022-10-23 thomas log_debug("unexpected imsg %d", imsg.hdr.type);
1924 3efd8e31 2022-10-23 thomas client = find_client(client_id);
1925 3efd8e31 2022-10-23 thomas if (client == NULL) {
1926 3efd8e31 2022-10-23 thomas log_warnx("%s: client not found", __func__);
1927 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1928 3efd8e31 2022-10-23 thomas continue;
1931 3efd8e31 2022-10-23 thomas if (!verify_imsg_src(client, proc, &imsg)) {
1932 3efd8e31 2022-10-23 thomas log_debug("dropping imsg type %d from PID %d",
1933 3efd8e31 2022-10-23 thomas imsg.hdr.type, proc->pid);
1934 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1935 3efd8e31 2022-10-23 thomas continue;
1937 3efd8e31 2022-10-23 thomas if (err)
1938 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1940 3efd8e31 2022-10-23 thomas if (do_disconnect) {
1941 3efd8e31 2022-10-23 thomas if (err)
1942 3efd8e31 2022-10-23 thomas disconnect_on_error(client, err);
1944 3efd8e31 2022-10-23 thomas disconnect(client);
1945 965fcba6 2022-11-04 thomas } else {
1946 965fcba6 2022-11-04 thomas if (do_packfile_install)
1947 965fcba6 2022-11-04 thomas err = install_pack(client, proc->chroot_path,
1949 965fcba6 2022-11-04 thomas else if (do_ref_updates)
1950 965fcba6 2022-11-04 thomas err = begin_ref_updates(client, &imsg);
1951 965fcba6 2022-11-04 thomas else if (do_ref_update)
1952 965fcba6 2022-11-04 thomas err = update_ref(client, proc->chroot_path,
1954 965fcba6 2022-11-04 thomas if (err)
1955 965fcba6 2022-11-04 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1957 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1960 3efd8e31 2022-10-23 thomas if (!shut) {
1961 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(iev);
1962 3efd8e31 2022-10-23 thomas } else {
1963 3efd8e31 2022-10-23 thomas /* This pipe is dead. Remove its event handler */
1964 3efd8e31 2022-10-23 thomas event_del(&iev->ev);
1965 3efd8e31 2022-10-23 thomas event_loopexit(NULL);
1969 3efd8e31 2022-10-23 thomas static pid_t
1970 3efd8e31 2022-10-23 thomas start_child(enum gotd_procid proc_id, const char *chroot_path,
1971 832b8374 2022-10-31 thomas char *argv0, const char *confpath, int fd, int daemonize, int verbosity)
1973 832b8374 2022-10-31 thomas char *argv[11];
1974 3efd8e31 2022-10-23 thomas int argc = 0;
1975 3efd8e31 2022-10-23 thomas pid_t pid;
1977 3efd8e31 2022-10-23 thomas switch (pid = fork()) {
1978 3efd8e31 2022-10-23 thomas case -1:
1979 3efd8e31 2022-10-23 thomas fatal("cannot fork");
1982 3efd8e31 2022-10-23 thomas default:
1983 3efd8e31 2022-10-23 thomas close(fd);
1984 3efd8e31 2022-10-23 thomas return pid;
1987 3efd8e31 2022-10-23 thomas if (fd != GOTD_SOCK_FILENO) {
1988 3efd8e31 2022-10-23 thomas if (dup2(fd, GOTD_SOCK_FILENO) == -1)
1989 3efd8e31 2022-10-23 thomas fatal("cannot setup imsg fd");
1990 3efd8e31 2022-10-23 thomas } else if (fcntl(fd, F_SETFD, 0) == -1)
1991 3efd8e31 2022-10-23 thomas fatal("cannot setup imsg fd");
1993 3efd8e31 2022-10-23 thomas argv[argc++] = argv0;
1994 3efd8e31 2022-10-23 thomas switch (proc_id) {
1995 3efd8e31 2022-10-23 thomas case PROC_REPO_READ:
1996 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-R";
1998 3efd8e31 2022-10-23 thomas case PROC_REPO_WRITE:
1999 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-W";
2001 3efd8e31 2022-10-23 thomas default:
2002 3efd8e31 2022-10-23 thomas fatalx("invalid process id %d", proc_id);
2005 832b8374 2022-10-31 thomas argv[argc++] = (char *)"-f";
2006 832b8374 2022-10-31 thomas argv[argc++] = (char *)confpath;
2008 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-P";
2009 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)chroot_path;
2011 3efd8e31 2022-10-23 thomas if (!daemonize)
2012 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-d";
2013 3efd8e31 2022-10-23 thomas if (verbosity > 0)
2014 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-v";
2015 3efd8e31 2022-10-23 thomas if (verbosity > 1)
2016 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-v";
2017 3efd8e31 2022-10-23 thomas argv[argc++] = NULL;
2019 3efd8e31 2022-10-23 thomas execvp(argv0, argv);
2020 3efd8e31 2022-10-23 thomas fatal("execvp");
2023 3efd8e31 2022-10-23 thomas static void
2024 832b8374 2022-10-31 thomas start_repo_children(struct gotd *gotd, char *argv0, const char *confpath,
2025 832b8374 2022-10-31 thomas int daemonize, int verbosity)
2027 3efd8e31 2022-10-23 thomas struct gotd_repo *repo = NULL;
2028 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
2032 3efd8e31 2022-10-23 thomas * XXX For now, use one reader and one writer per repository.
2033 3efd8e31 2022-10-23 thomas * This should be changed to N readers + M writers.
2035 3efd8e31 2022-10-23 thomas gotd->nprocs = gotd->nrepos * 2;
2036 3efd8e31 2022-10-23 thomas gotd->procs = calloc(gotd->nprocs, sizeof(*gotd->procs));
2037 3efd8e31 2022-10-23 thomas if (gotd->procs == NULL)
2038 3efd8e31 2022-10-23 thomas fatal("calloc");
2039 3efd8e31 2022-10-23 thomas for (i = 0; i < gotd->nprocs; i++) {
2040 3efd8e31 2022-10-23 thomas if (repo == NULL)
2041 3efd8e31 2022-10-23 thomas repo = TAILQ_FIRST(&gotd->repos);
2042 3efd8e31 2022-10-23 thomas proc = &gotd->procs[i];
2043 3efd8e31 2022-10-23 thomas if (i < gotd->nrepos)
2044 3efd8e31 2022-10-23 thomas proc->type = PROC_REPO_READ;
2046 3efd8e31 2022-10-23 thomas proc->type = PROC_REPO_WRITE;
2047 3efd8e31 2022-10-23 thomas if (strlcpy(proc->repo_name, repo->name,
2048 3efd8e31 2022-10-23 thomas sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
2049 3efd8e31 2022-10-23 thomas fatalx("repository name too long: %s", repo->name);
2050 3efd8e31 2022-10-23 thomas log_debug("adding repository %s", repo->name);
2051 3efd8e31 2022-10-23 thomas if (realpath(repo->path, proc->chroot_path) == NULL)
2052 3efd8e31 2022-10-23 thomas fatal("%s", repo->path);
2053 3efd8e31 2022-10-23 thomas if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
2054 3efd8e31 2022-10-23 thomas PF_UNSPEC, proc->pipe) == -1)
2055 3efd8e31 2022-10-23 thomas fatal("socketpair");
2056 3efd8e31 2022-10-23 thomas proc->pid = start_child(proc->type, proc->chroot_path, argv0,
2057 832b8374 2022-10-31 thomas confpath, proc->pipe[1], daemonize, verbosity);
2058 3efd8e31 2022-10-23 thomas imsg_init(&proc->iev.ibuf, proc->pipe[0]);
2059 3efd8e31 2022-10-23 thomas log_debug("proc %s %s is on fd %d",
2060 3efd8e31 2022-10-23 thomas gotd_proc_names[proc->type], proc->chroot_path,
2061 3efd8e31 2022-10-23 thomas proc->pipe[0]);
2062 3efd8e31 2022-10-23 thomas proc->iev.handler = gotd_dispatch;
2063 3efd8e31 2022-10-23 thomas proc->iev.events = EV_READ;
2064 3efd8e31 2022-10-23 thomas proc->iev.handler_arg = NULL;
2065 3efd8e31 2022-10-23 thomas event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
2066 3efd8e31 2022-10-23 thomas gotd_dispatch, &proc->iev);
2068 3efd8e31 2022-10-23 thomas repo = TAILQ_NEXT(repo, entry);
2072 3efd8e31 2022-10-23 thomas static void
2073 3efd8e31 2022-10-23 thomas apply_unveil(void)
2075 3efd8e31 2022-10-23 thomas struct gotd_repo *repo;
2077 3efd8e31 2022-10-23 thomas TAILQ_FOREACH(repo, &gotd.repos, entry) {
2078 3efd8e31 2022-10-23 thomas if (unveil(repo->path, "rwc") == -1)
2079 3efd8e31 2022-10-23 thomas fatal("unveil %s", repo->path);
2082 3efd8e31 2022-10-23 thomas if (unveil(GOT_TMPDIR_STR, "rwc") == -1)
2083 3efd8e31 2022-10-23 thomas fatal("unveil %s", GOT_TMPDIR_STR);
2085 3efd8e31 2022-10-23 thomas if (unveil(NULL, NULL) == -1)
2086 3efd8e31 2022-10-23 thomas fatal("unveil");
2090 3efd8e31 2022-10-23 thomas main(int argc, char **argv)
2092 3efd8e31 2022-10-23 thomas const struct got_error *error = NULL;
2093 3efd8e31 2022-10-23 thomas int ch, fd = -1, daemonize = 1, verbosity = 0, noaction = 0;
2094 3efd8e31 2022-10-23 thomas const char *confpath = GOTD_CONF_PATH;
2095 3efd8e31 2022-10-23 thomas char *argv0 = argv[0];
2096 3efd8e31 2022-10-23 thomas char title[2048];
2097 ff260661 2022-11-17 thomas gid_t groups[NGROUPS_MAX];
2098 729a7e24 2022-11-17 thomas int ngroups = NGROUPS_MAX;
2099 3efd8e31 2022-10-23 thomas struct passwd *pw = NULL;
2100 3efd8e31 2022-10-23 thomas struct group *gr = NULL;
2101 3efd8e31 2022-10-23 thomas char *repo_path = NULL;
2102 3efd8e31 2022-10-23 thomas enum gotd_procid proc_id = PROC_GOTD;
2103 3efd8e31 2022-10-23 thomas struct event evsigint, evsigterm, evsighup, evsigusr1;
2104 3efd8e31 2022-10-23 thomas int *pack_fds = NULL, *temp_fds = NULL;
2106 3efd8e31 2022-10-23 thomas log_init(1, LOG_DAEMON); /* Log to stderr until daemonized. */
2108 f7065961 2022-10-27 thomas while ((ch = getopt(argc, argv, "df:nP:RvW")) != -1) {
2109 3efd8e31 2022-10-23 thomas switch (ch) {
2110 3efd8e31 2022-10-23 thomas case 'd':
2111 3efd8e31 2022-10-23 thomas daemonize = 0;
2113 3efd8e31 2022-10-23 thomas case 'f':
2114 3efd8e31 2022-10-23 thomas confpath = optarg;
2116 3efd8e31 2022-10-23 thomas case 'n':
2117 3efd8e31 2022-10-23 thomas noaction = 1;
2119 f7065961 2022-10-27 thomas case 'P':
2120 f7065961 2022-10-27 thomas repo_path = realpath(optarg, NULL);
2121 f7065961 2022-10-27 thomas if (repo_path == NULL)
2122 f7065961 2022-10-27 thomas fatal("realpath '%s'", optarg);
2124 3efd8e31 2022-10-23 thomas case 'R':
2125 3efd8e31 2022-10-23 thomas proc_id = PROC_REPO_READ;
2127 f7065961 2022-10-27 thomas case 'v':
2128 f7065961 2022-10-27 thomas if (verbosity < 3)
2129 f7065961 2022-10-27 thomas verbosity++;
2131 3efd8e31 2022-10-23 thomas case 'W':
2132 3efd8e31 2022-10-23 thomas proc_id = PROC_REPO_WRITE;
2134 3efd8e31 2022-10-23 thomas default:
2135 3efd8e31 2022-10-23 thomas usage();
2139 3efd8e31 2022-10-23 thomas argc -= optind;
2140 3efd8e31 2022-10-23 thomas argv += optind;
2142 3efd8e31 2022-10-23 thomas if (argc != 0)
2143 3efd8e31 2022-10-23 thomas usage();
2145 3efd8e31 2022-10-23 thomas if (geteuid())
2146 3efd8e31 2022-10-23 thomas fatalx("need root privileges");
2148 3efd8e31 2022-10-23 thomas log_init(daemonize ? 0 : 1, LOG_DAEMON);
2149 3efd8e31 2022-10-23 thomas log_setverbose(verbosity);
2151 3efd8e31 2022-10-23 thomas if (parse_config(confpath, proc_id, &gotd) != 0)
2152 3efd8e31 2022-10-23 thomas return 1;
2154 3efd8e31 2022-10-23 thomas if (proc_id == PROC_GOTD &&
2155 3efd8e31 2022-10-23 thomas (gotd.nrepos == 0 || TAILQ_EMPTY(&gotd.repos)))
2156 3efd8e31 2022-10-23 thomas fatalx("no repository defined in configuration file");
2158 3efd8e31 2022-10-23 thomas pw = getpwnam(gotd.user_name);
2159 3efd8e31 2022-10-23 thomas if (pw == NULL)
2160 3efd8e31 2022-10-23 thomas fatal("getpwuid: user %s not found", gotd.user_name);
2162 3efd8e31 2022-10-23 thomas if (pw->pw_uid == 0) {
2163 3efd8e31 2022-10-23 thomas fatalx("cannot run %s as %s: the user running %s "
2164 3efd8e31 2022-10-23 thomas "must not be the superuser",
2165 3efd8e31 2022-10-23 thomas getprogname(), pw->pw_name, getprogname());
2168 ff260661 2022-11-17 thomas if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups) == -1)
2169 3efd8e31 2022-10-23 thomas log_warnx("group membership list truncated");
2171 ff260661 2022-11-17 thomas gr = match_group(groups, ngroups, gotd.unix_group_name);
2172 3efd8e31 2022-10-23 thomas if (gr == NULL) {
2173 3efd8e31 2022-10-23 thomas fatalx("cannot start %s: the user running %s "
2174 3efd8e31 2022-10-23 thomas "must be a secondary member of group %s",
2175 3efd8e31 2022-10-23 thomas getprogname(), getprogname(), gotd.unix_group_name);
2177 3efd8e31 2022-10-23 thomas if (gr->gr_gid == pw->pw_gid) {
2178 3efd8e31 2022-10-23 thomas fatalx("cannot start %s: the user running %s "
2179 3efd8e31 2022-10-23 thomas "must be a secondary member of group %s, but "
2180 3efd8e31 2022-10-23 thomas "%s is the user's primary group",
2181 3efd8e31 2022-10-23 thomas getprogname(), getprogname(), gotd.unix_group_name,
2182 3efd8e31 2022-10-23 thomas gotd.unix_group_name);
2185 3efd8e31 2022-10-23 thomas if (proc_id == PROC_GOTD &&
2186 3efd8e31 2022-10-23 thomas !got_path_is_absolute(gotd.unix_socket_path))
2187 3efd8e31 2022-10-23 thomas fatalx("bad unix socket path \"%s\": must be an absolute path",
2188 3efd8e31 2022-10-23 thomas gotd.unix_socket_path);
2190 3efd8e31 2022-10-23 thomas if (noaction)
2191 3efd8e31 2022-10-23 thomas return 0;
2193 3efd8e31 2022-10-23 thomas if (proc_id == PROC_GOTD && verbosity) {
2194 3efd8e31 2022-10-23 thomas log_info("socket: %s", gotd.unix_socket_path);
2195 3efd8e31 2022-10-23 thomas log_info("user: %s", pw->pw_name);
2196 3efd8e31 2022-10-23 thomas log_info("secondary group: %s", gr->gr_name);
2198 3efd8e31 2022-10-23 thomas fd = unix_socket_listen(gotd.unix_socket_path, pw->pw_uid,
2199 3efd8e31 2022-10-23 thomas gr->gr_gid);
2200 3efd8e31 2022-10-23 thomas if (fd == -1) {
2201 3efd8e31 2022-10-23 thomas fatal("cannot listen on unix socket %s",
2202 3efd8e31 2022-10-23 thomas gotd.unix_socket_path);
2206 3efd8e31 2022-10-23 thomas if (proc_id == PROC_GOTD) {
2207 3efd8e31 2022-10-23 thomas gotd.pid = getpid();
2208 3efd8e31 2022-10-23 thomas snprintf(title, sizeof(title), "%s", gotd_proc_names[proc_id]);
2209 832b8374 2022-10-31 thomas start_repo_children(&gotd, argv0, confpath, daemonize,
2210 832b8374 2022-10-31 thomas verbosity);
2211 3efd8e31 2022-10-23 thomas arc4random_buf(&clients_hash_key, sizeof(clients_hash_key));
2212 3efd8e31 2022-10-23 thomas if (daemonize && daemon(0, 0) == -1)
2213 3efd8e31 2022-10-23 thomas fatal("daemon");
2214 3efd8e31 2022-10-23 thomas } else if (proc_id == PROC_REPO_READ || proc_id == PROC_REPO_WRITE) {
2215 3efd8e31 2022-10-23 thomas error = got_repo_pack_fds_open(&pack_fds);
2216 3efd8e31 2022-10-23 thomas if (error != NULL)
2217 3efd8e31 2022-10-23 thomas fatalx("cannot open pack tempfiles: %s", error->msg);
2218 3efd8e31 2022-10-23 thomas error = got_repo_temp_fds_open(&temp_fds);
2219 3efd8e31 2022-10-23 thomas if (error != NULL)
2220 3efd8e31 2022-10-23 thomas fatalx("cannot open pack tempfiles: %s", error->msg);
2221 3efd8e31 2022-10-23 thomas if (repo_path == NULL)
2222 3efd8e31 2022-10-23 thomas fatalx("repository path not specified");
2223 3efd8e31 2022-10-23 thomas snprintf(title, sizeof(title), "%s %s",
2224 3efd8e31 2022-10-23 thomas gotd_proc_names[proc_id], repo_path);
2225 3efd8e31 2022-10-23 thomas if (chroot(repo_path) == -1)
2226 3efd8e31 2022-10-23 thomas fatal("chroot");
2227 3efd8e31 2022-10-23 thomas if (chdir("/") == -1)
2228 3efd8e31 2022-10-23 thomas fatal("chdir(\"/\")");
2229 3efd8e31 2022-10-23 thomas if (daemonize && daemon(1, 0) == -1)
2230 3efd8e31 2022-10-23 thomas fatal("daemon");
2232 3efd8e31 2022-10-23 thomas fatal("invalid process id %d", proc_id);
2234 3efd8e31 2022-10-23 thomas setproctitle("%s", title);
2235 3efd8e31 2022-10-23 thomas log_procinit(title);
2237 3efd8e31 2022-10-23 thomas /* Drop root privileges. */
2238 3efd8e31 2022-10-23 thomas if (setgid(pw->pw_gid) == -1)
2239 3efd8e31 2022-10-23 thomas fatal("setgid %d failed", pw->pw_gid);
2240 3efd8e31 2022-10-23 thomas if (setuid(pw->pw_uid) == -1)
2241 3efd8e31 2022-10-23 thomas fatal("setuid %d failed", pw->pw_uid);
2243 3efd8e31 2022-10-23 thomas event_init();
2245 3efd8e31 2022-10-23 thomas switch (proc_id) {
2246 3efd8e31 2022-10-23 thomas case PROC_GOTD:
2247 3efd8e31 2022-10-23 thomas #ifndef PROFILE
2248 3efd8e31 2022-10-23 thomas if (pledge("stdio rpath wpath cpath proc getpw sendfd recvfd "
2249 3efd8e31 2022-10-23 thomas "fattr flock unix unveil", NULL) == -1)
2250 3efd8e31 2022-10-23 thomas err(1, "pledge");
2253 3efd8e31 2022-10-23 thomas case PROC_REPO_READ:
2254 3efd8e31 2022-10-23 thomas #ifndef PROFILE
2255 cc4cc677 2022-10-28 thomas if (pledge("stdio rpath recvfd", NULL) == -1)
2256 3efd8e31 2022-10-23 thomas err(1, "pledge");
2258 3efd8e31 2022-10-23 thomas repo_read_main(title, pack_fds, temp_fds);
2259 3efd8e31 2022-10-23 thomas /* NOTREACHED */
2260 3efd8e31 2022-10-23 thomas exit(0);
2261 3efd8e31 2022-10-23 thomas case PROC_REPO_WRITE:
2262 3efd8e31 2022-10-23 thomas #ifndef PROFILE
2263 3efd8e31 2022-10-23 thomas if (pledge("stdio rpath sendfd recvfd", NULL) == -1)
2264 3efd8e31 2022-10-23 thomas err(1, "pledge");
2266 3efd8e31 2022-10-23 thomas repo_write_main(title, pack_fds, temp_fds);
2267 3efd8e31 2022-10-23 thomas /* NOTREACHED */
2268 3efd8e31 2022-10-23 thomas exit(0);
2269 3efd8e31 2022-10-23 thomas default:
2270 3efd8e31 2022-10-23 thomas fatal("invalid process id %d", proc_id);
2273 3efd8e31 2022-10-23 thomas if (proc_id != PROC_GOTD)
2274 3efd8e31 2022-10-23 thomas fatal("invalid process id %d", proc_id);
2276 3efd8e31 2022-10-23 thomas apply_unveil();
2278 3efd8e31 2022-10-23 thomas signal_set(&evsigint, SIGINT, gotd_sighdlr, NULL);
2279 3efd8e31 2022-10-23 thomas signal_set(&evsigterm, SIGTERM, gotd_sighdlr, NULL);
2280 3efd8e31 2022-10-23 thomas signal_set(&evsighup, SIGHUP, gotd_sighdlr, NULL);
2281 3efd8e31 2022-10-23 thomas signal_set(&evsigusr1, SIGUSR1, gotd_sighdlr, NULL);
2282 3efd8e31 2022-10-23 thomas signal(SIGPIPE, SIG_IGN);
2284 3efd8e31 2022-10-23 thomas signal_add(&evsigint, NULL);
2285 3efd8e31 2022-10-23 thomas signal_add(&evsigterm, NULL);
2286 3efd8e31 2022-10-23 thomas signal_add(&evsighup, NULL);
2287 3efd8e31 2022-10-23 thomas signal_add(&evsigusr1, NULL);
2289 3efd8e31 2022-10-23 thomas event_set(&gotd.ev, fd, EV_READ | EV_PERSIST, gotd_accept, NULL);
2290 3efd8e31 2022-10-23 thomas if (event_add(&gotd.ev, NULL))
2291 3efd8e31 2022-10-23 thomas fatalx("event add");
2292 3efd8e31 2022-10-23 thomas evtimer_set(&gotd.pause, gotd_accept_paused, NULL);
2294 3efd8e31 2022-10-23 thomas event_dispatch();
2296 3efd8e31 2022-10-23 thomas if (fd != -1)
2297 3efd8e31 2022-10-23 thomas close(fd);
2298 3efd8e31 2022-10-23 thomas if (pack_fds)
2299 3efd8e31 2022-10-23 thomas got_repo_pack_fds_close(pack_fds);
2300 3efd8e31 2022-10-23 thomas free(repo_path);
2301 3efd8e31 2022-10-23 thomas return 0;
