2 62ee7d94 2023-01-10 thomas * Copyright (c) 2022, 2023 Stefan Sperling <stsp@openbsd.org>
4 62ee7d94 2023-01-10 thomas * Permission to use, copy, modify, and distribute this software for any
5 62ee7d94 2023-01-10 thomas * purpose with or without fee is hereby granted, provided that the above
6 62ee7d94 2023-01-10 thomas * copyright notice and this permission notice appear in all copies.
8 62ee7d94 2023-01-10 thomas * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 62ee7d94 2023-01-10 thomas * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 62ee7d94 2023-01-10 thomas * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 62ee7d94 2023-01-10 thomas * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 62ee7d94 2023-01-10 thomas * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 62ee7d94 2023-01-10 thomas * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 62ee7d94 2023-01-10 thomas * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 62ee7d94 2023-01-10 thomas #include <sys/types.h>
18 62ee7d94 2023-01-10 thomas #include <sys/queue.h>
19 62ee7d94 2023-01-10 thomas #include <sys/socket.h>
20 851a5b48 2023-02-03 thomas #include <sys/stat.h>
21 62ee7d94 2023-01-10 thomas #include <sys/uio.h>
23 62ee7d94 2023-01-10 thomas #include <errno.h>
24 62ee7d94 2023-01-10 thomas #include <event.h>
25 62ee7d94 2023-01-10 thomas #include <limits.h>
26 62ee7d94 2023-01-10 thomas #include <signal.h>
27 62ee7d94 2023-01-10 thomas #include <stdint.h>
28 62ee7d94 2023-01-10 thomas #include <stdio.h>
29 62ee7d94 2023-01-10 thomas #include <stdlib.h>
30 62ee7d94 2023-01-10 thomas #include <string.h>
31 62ee7d94 2023-01-10 thomas #include <imsg.h>
32 62ee7d94 2023-01-10 thomas #include <unistd.h>
34 62ee7d94 2023-01-10 thomas #include "got_error.h"
35 62ee7d94 2023-01-10 thomas #include "got_repository.h"
36 62ee7d94 2023-01-10 thomas #include "got_object.h"
37 62ee7d94 2023-01-10 thomas #include "got_path.h"
38 62ee7d94 2023-01-10 thomas #include "got_reference.h"
39 62ee7d94 2023-01-10 thomas #include "got_opentemp.h"
41 be288a59 2023-02-23 thomas #include "got_lib_hash.h"
42 62ee7d94 2023-01-10 thomas #include "got_lib_delta.h"
43 62ee7d94 2023-01-10 thomas #include "got_lib_object.h"
44 62ee7d94 2023-01-10 thomas #include "got_lib_object_cache.h"
45 62ee7d94 2023-01-10 thomas #include "got_lib_pack.h"
46 62ee7d94 2023-01-10 thomas #include "got_lib_repository.h"
47 62ee7d94 2023-01-10 thomas #include "got_lib_gitproto.h"
49 62ee7d94 2023-01-10 thomas #include "gotd.h"
50 62ee7d94 2023-01-10 thomas #include "log.h"
51 62ee7d94 2023-01-10 thomas #include "session.h"
54 62ee7d94 2023-01-10 thomas static struct gotd_session {
55 62ee7d94 2023-01-10 thomas pid_t pid;
56 62ee7d94 2023-01-10 thomas const char *title;
57 62ee7d94 2023-01-10 thomas struct got_repository *repo;
58 62ee7d94 2023-01-10 thomas int *pack_fds;
59 62ee7d94 2023-01-10 thomas int *temp_fds;
60 62ee7d94 2023-01-10 thomas struct gotd_imsgev parent_iev;
61 62ee7d94 2023-01-10 thomas struct timeval request_timeout;
62 7fed8fa4 2023-06-22 thomas enum gotd_procid proc_id;
63 62ee7d94 2023-01-10 thomas } gotd_session;
65 62ee7d94 2023-01-10 thomas static struct gotd_session_client {
66 7b1db75e 2023-01-14 thomas enum gotd_session_state state;
67 62ee7d94 2023-01-10 thomas int is_writing;
68 62ee7d94 2023-01-10 thomas struct gotd_client_capability *capabilities;
69 62ee7d94 2023-01-10 thomas size_t ncapa_alloc;
70 62ee7d94 2023-01-10 thomas size_t ncapabilities;
71 62ee7d94 2023-01-10 thomas uint32_t id;
73 62ee7d94 2023-01-10 thomas int delta_cache_fd;
74 62ee7d94 2023-01-10 thomas struct gotd_imsgev iev;
75 62ee7d94 2023-01-10 thomas struct gotd_imsgev repo_child_iev;
76 62ee7d94 2023-01-10 thomas struct event tmo;
77 62ee7d94 2023-01-10 thomas uid_t euid;
78 62ee7d94 2023-01-10 thomas gid_t egid;
79 62ee7d94 2023-01-10 thomas char *packfile_path;
80 62ee7d94 2023-01-10 thomas char *packidx_path;
81 62ee7d94 2023-01-10 thomas int nref_updates;
82 98c7fd82 2023-01-23 thomas int accept_flush_pkt;
83 c8b73ac1 2023-08-23 thomas int flush_disconnect;
84 62ee7d94 2023-01-10 thomas } gotd_session_client;
86 62ee7d94 2023-01-10 thomas void gotd_session_sighdlr(int sig, short event, void *arg);
87 62ee7d94 2023-01-10 thomas static void gotd_session_shutdown(void);
89 62ee7d94 2023-01-10 thomas static void
90 62ee7d94 2023-01-10 thomas disconnect(struct gotd_session_client *client)
92 62ee7d94 2023-01-10 thomas log_debug("uid %d: disconnecting", client->euid);
94 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&gotd_session.parent_iev,
95 7fed8fa4 2023-06-22 thomas GOTD_IMSG_DISCONNECT, gotd_session.proc_id, -1, NULL, 0) == -1)
96 62ee7d94 2023-01-10 thomas log_warn("imsg compose DISCONNECT");
98 62ee7d94 2023-01-10 thomas imsg_clear(&client->repo_child_iev.ibuf);
99 62ee7d94 2023-01-10 thomas event_del(&client->repo_child_iev.ev);
100 62ee7d94 2023-01-10 thomas evtimer_del(&client->tmo);
101 62ee7d94 2023-01-10 thomas close(client->fd);
102 62ee7d94 2023-01-10 thomas if (client->delta_cache_fd != -1)
103 62ee7d94 2023-01-10 thomas close(client->delta_cache_fd);
104 62ee7d94 2023-01-10 thomas if (client->packfile_path) {
105 62ee7d94 2023-01-10 thomas if (unlink(client->packfile_path) == -1 && errno != ENOENT)
106 62ee7d94 2023-01-10 thomas log_warn("unlink %s: ", client->packfile_path);
107 62ee7d94 2023-01-10 thomas free(client->packfile_path);
109 62ee7d94 2023-01-10 thomas if (client->packidx_path) {
110 62ee7d94 2023-01-10 thomas if (unlink(client->packidx_path) == -1 && errno != ENOENT)
111 62ee7d94 2023-01-10 thomas log_warn("unlink %s: ", client->packidx_path);
112 62ee7d94 2023-01-10 thomas free(client->packidx_path);
114 62ee7d94 2023-01-10 thomas free(client->capabilities);
116 62ee7d94 2023-01-10 thomas gotd_session_shutdown();
119 62ee7d94 2023-01-10 thomas static void
120 62ee7d94 2023-01-10 thomas disconnect_on_error(struct gotd_session_client *client,
121 62ee7d94 2023-01-10 thomas const struct got_error *err)
123 62ee7d94 2023-01-10 thomas struct imsgbuf ibuf;
125 62ee7d94 2023-01-10 thomas if (err->code != GOT_ERR_EOF) {
126 a6153ffb 2023-08-12 thomas log_warnx("uid %d: %s", client->euid, err->msg);
127 62ee7d94 2023-01-10 thomas imsg_init(&ibuf, client->fd);
128 7fed8fa4 2023-06-22 thomas gotd_imsg_send_error(&ibuf, 0, gotd_session.proc_id, err);
129 62ee7d94 2023-01-10 thomas imsg_clear(&ibuf);
132 62ee7d94 2023-01-10 thomas disconnect(client);
135 62ee7d94 2023-01-10 thomas static void
136 62ee7d94 2023-01-10 thomas gotd_request_timeout(int fd, short events, void *arg)
138 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = arg;
140 62ee7d94 2023-01-10 thomas log_debug("disconnecting uid %d due to timeout", client->euid);
141 62ee7d94 2023-01-10 thomas disconnect(client);
145 62ee7d94 2023-01-10 thomas gotd_session_sighdlr(int sig, short event, void *arg)
148 62ee7d94 2023-01-10 thomas * Normal signal handler rules don't apply because libevent
149 62ee7d94 2023-01-10 thomas * decouples for us.
152 62ee7d94 2023-01-10 thomas switch (sig) {
153 62ee7d94 2023-01-10 thomas case SIGHUP:
154 62ee7d94 2023-01-10 thomas log_info("%s: ignoring SIGHUP", __func__);
156 62ee7d94 2023-01-10 thomas case SIGUSR1:
157 62ee7d94 2023-01-10 thomas log_info("%s: ignoring SIGUSR1", __func__);
159 62ee7d94 2023-01-10 thomas case SIGTERM:
160 62ee7d94 2023-01-10 thomas case SIGINT:
161 62ee7d94 2023-01-10 thomas gotd_session_shutdown();
162 62ee7d94 2023-01-10 thomas /* NOTREACHED */
165 62ee7d94 2023-01-10 thomas fatalx("unexpected signal");
169 62ee7d94 2023-01-10 thomas static const struct got_error *
170 62ee7d94 2023-01-10 thomas recv_packfile_done(uint32_t *client_id, struct imsg *imsg)
172 62ee7d94 2023-01-10 thomas struct gotd_imsg_packfile_done idone;
173 62ee7d94 2023-01-10 thomas size_t datalen;
175 62ee7d94 2023-01-10 thomas log_debug("packfile-done received");
177 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
178 62ee7d94 2023-01-10 thomas if (datalen != sizeof(idone))
179 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
180 62ee7d94 2023-01-10 thomas memcpy(&idone, imsg->data, sizeof(idone));
182 62ee7d94 2023-01-10 thomas *client_id = idone.client_id;
183 62ee7d94 2023-01-10 thomas return NULL;
186 62ee7d94 2023-01-10 thomas static const struct got_error *
187 62ee7d94 2023-01-10 thomas recv_packfile_install(uint32_t *client_id, struct imsg *imsg)
189 62ee7d94 2023-01-10 thomas struct gotd_imsg_packfile_install inst;
190 62ee7d94 2023-01-10 thomas size_t datalen;
192 62ee7d94 2023-01-10 thomas log_debug("packfile-install received");
194 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
195 62ee7d94 2023-01-10 thomas if (datalen != sizeof(inst))
196 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
197 62ee7d94 2023-01-10 thomas memcpy(&inst, imsg->data, sizeof(inst));
199 62ee7d94 2023-01-10 thomas *client_id = inst.client_id;
200 62ee7d94 2023-01-10 thomas return NULL;
203 62ee7d94 2023-01-10 thomas static const struct got_error *
204 62ee7d94 2023-01-10 thomas recv_ref_updates_start(uint32_t *client_id, struct imsg *imsg)
206 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_updates_start istart;
207 62ee7d94 2023-01-10 thomas size_t datalen;
209 62ee7d94 2023-01-10 thomas log_debug("ref-updates-start received");
211 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
212 62ee7d94 2023-01-10 thomas if (datalen != sizeof(istart))
213 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
214 62ee7d94 2023-01-10 thomas memcpy(&istart, imsg->data, sizeof(istart));
216 62ee7d94 2023-01-10 thomas *client_id = istart.client_id;
217 62ee7d94 2023-01-10 thomas return NULL;
220 62ee7d94 2023-01-10 thomas static const struct got_error *
221 62ee7d94 2023-01-10 thomas recv_ref_update(uint32_t *client_id, struct imsg *imsg)
223 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update iref;
224 62ee7d94 2023-01-10 thomas size_t datalen;
226 62ee7d94 2023-01-10 thomas log_debug("ref-update received");
228 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
229 62ee7d94 2023-01-10 thomas if (datalen < sizeof(iref))
230 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
231 62ee7d94 2023-01-10 thomas memcpy(&iref, imsg->data, sizeof(iref));
233 62ee7d94 2023-01-10 thomas *client_id = iref.client_id;
234 62ee7d94 2023-01-10 thomas return NULL;
237 62ee7d94 2023-01-10 thomas static const struct got_error *
238 62ee7d94 2023-01-10 thomas send_ref_update_ok(struct gotd_session_client *client,
239 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update *iref, const char *refname)
241 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update_ok iok;
242 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = &client->iev;
243 62ee7d94 2023-01-10 thomas struct ibuf *wbuf;
244 62ee7d94 2023-01-10 thomas size_t len;
246 62ee7d94 2023-01-10 thomas memset(&iok, 0, sizeof(iok));
247 62ee7d94 2023-01-10 thomas iok.client_id = client->id;
248 62ee7d94 2023-01-10 thomas memcpy(iok.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
249 62ee7d94 2023-01-10 thomas memcpy(iok.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
250 62ee7d94 2023-01-10 thomas iok.name_len = strlen(refname);
252 62ee7d94 2023-01-10 thomas len = sizeof(iok) + iok.name_len;
253 62ee7d94 2023-01-10 thomas wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_REF_UPDATE_OK,
254 7fed8fa4 2023-06-22 thomas gotd_session.proc_id, gotd_session.pid, len);
255 62ee7d94 2023-01-10 thomas if (wbuf == NULL)
256 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_create REF_UPDATE_OK");
258 62ee7d94 2023-01-10 thomas if (imsg_add(wbuf, &iok, sizeof(iok)) == -1)
259 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_add REF_UPDATE_OK");
260 62ee7d94 2023-01-10 thomas if (imsg_add(wbuf, refname, iok.name_len) == -1)
261 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_add REF_UPDATE_OK");
263 62ee7d94 2023-01-10 thomas wbuf->fd = -1;
264 62ee7d94 2023-01-10 thomas imsg_close(&iev->ibuf, wbuf);
265 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(iev);
266 62ee7d94 2023-01-10 thomas return NULL;
269 62ee7d94 2023-01-10 thomas static void
270 62ee7d94 2023-01-10 thomas send_refs_updated(struct gotd_session_client *client)
272 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->iev, GOTD_IMSG_REFS_UPDATED,
273 7fed8fa4 2023-06-22 thomas gotd_session.proc_id, -1, NULL, 0) == -1)
274 62ee7d94 2023-01-10 thomas log_warn("imsg compose REFS_UPDATED");
277 62ee7d94 2023-01-10 thomas static const struct got_error *
278 62ee7d94 2023-01-10 thomas send_ref_update_ng(struct gotd_session_client *client,
279 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update *iref, const char *refname,
280 62ee7d94 2023-01-10 thomas const char *reason)
282 62ee7d94 2023-01-10 thomas const struct got_error *ng_err;
283 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update_ng ing;
284 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = &client->iev;
285 62ee7d94 2023-01-10 thomas struct ibuf *wbuf;
286 62ee7d94 2023-01-10 thomas size_t len;
288 62ee7d94 2023-01-10 thomas memset(&ing, 0, sizeof(ing));
289 62ee7d94 2023-01-10 thomas ing.client_id = client->id;
290 62ee7d94 2023-01-10 thomas memcpy(ing.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
291 62ee7d94 2023-01-10 thomas memcpy(ing.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
292 62ee7d94 2023-01-10 thomas ing.name_len = strlen(refname);
294 62ee7d94 2023-01-10 thomas ng_err = got_error_fmt(GOT_ERR_REF_BUSY, "%s", reason);
295 62ee7d94 2023-01-10 thomas ing.reason_len = strlen(ng_err->msg);
297 62ee7d94 2023-01-10 thomas len = sizeof(ing) + ing.name_len + ing.reason_len;
298 62ee7d94 2023-01-10 thomas wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_REF_UPDATE_NG,
299 7fed8fa4 2023-06-22 thomas gotd_session.proc_id, gotd_session.pid, len);
300 62ee7d94 2023-01-10 thomas if (wbuf == NULL)
301 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_create REF_UPDATE_NG");
303 62ee7d94 2023-01-10 thomas if (imsg_add(wbuf, &ing, sizeof(ing)) == -1)
304 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
305 62ee7d94 2023-01-10 thomas if (imsg_add(wbuf, refname, ing.name_len) == -1)
306 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
307 62ee7d94 2023-01-10 thomas if (imsg_add(wbuf, ng_err->msg, ing.reason_len) == -1)
308 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
310 62ee7d94 2023-01-10 thomas wbuf->fd = -1;
311 62ee7d94 2023-01-10 thomas imsg_close(&iev->ibuf, wbuf);
312 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(iev);
313 62ee7d94 2023-01-10 thomas return NULL;
316 62ee7d94 2023-01-10 thomas static const struct got_error *
317 62ee7d94 2023-01-10 thomas install_pack(struct gotd_session_client *client, const char *repo_path,
318 62ee7d94 2023-01-10 thomas struct imsg *imsg)
320 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
321 62ee7d94 2023-01-10 thomas struct gotd_imsg_packfile_install inst;
322 62ee7d94 2023-01-10 thomas char hex[SHA1_DIGEST_STRING_LENGTH];
323 62ee7d94 2023-01-10 thomas size_t datalen;
324 62ee7d94 2023-01-10 thomas char *packfile_path = NULL, *packidx_path = NULL;
326 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
327 62ee7d94 2023-01-10 thomas if (datalen != sizeof(inst))
328 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
329 62ee7d94 2023-01-10 thomas memcpy(&inst, imsg->data, sizeof(inst));
331 62ee7d94 2023-01-10 thomas if (client->packfile_path == NULL)
332 62ee7d94 2023-01-10 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
333 62ee7d94 2023-01-10 thomas "client has no pack file");
334 62ee7d94 2023-01-10 thomas if (client->packidx_path == NULL)
335 62ee7d94 2023-01-10 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
336 62ee7d94 2023-01-10 thomas "client has no pack file index");
338 62ee7d94 2023-01-10 thomas if (got_sha1_digest_to_str(inst.pack_sha1, hex, sizeof(hex)) == NULL)
339 62ee7d94 2023-01-10 thomas return got_error_msg(GOT_ERR_NO_SPACE,
340 62ee7d94 2023-01-10 thomas "could not convert pack file SHA1 to hex");
342 62ee7d94 2023-01-10 thomas if (asprintf(&packfile_path, "/%s/%s/pack-%s.pack",
343 62ee7d94 2023-01-10 thomas repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
344 62ee7d94 2023-01-10 thomas err = got_error_from_errno("asprintf");
345 62ee7d94 2023-01-10 thomas goto done;
348 62ee7d94 2023-01-10 thomas if (asprintf(&packidx_path, "/%s/%s/pack-%s.idx",
349 62ee7d94 2023-01-10 thomas repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
350 62ee7d94 2023-01-10 thomas err = got_error_from_errno("asprintf");
351 62ee7d94 2023-01-10 thomas goto done;
354 62ee7d94 2023-01-10 thomas if (rename(client->packfile_path, packfile_path) == -1) {
355 62ee7d94 2023-01-10 thomas err = got_error_from_errno3("rename", client->packfile_path,
356 62ee7d94 2023-01-10 thomas packfile_path);
357 62ee7d94 2023-01-10 thomas goto done;
360 62ee7d94 2023-01-10 thomas free(client->packfile_path);
361 62ee7d94 2023-01-10 thomas client->packfile_path = NULL;
363 62ee7d94 2023-01-10 thomas if (rename(client->packidx_path, packidx_path) == -1) {
364 62ee7d94 2023-01-10 thomas err = got_error_from_errno3("rename", client->packidx_path,
365 62ee7d94 2023-01-10 thomas packidx_path);
366 62ee7d94 2023-01-10 thomas goto done;
369 62ee7d94 2023-01-10 thomas free(client->packidx_path);
370 62ee7d94 2023-01-10 thomas client->packidx_path = NULL;
372 62ee7d94 2023-01-10 thomas free(packfile_path);
373 62ee7d94 2023-01-10 thomas free(packidx_path);
374 62ee7d94 2023-01-10 thomas return err;
377 62ee7d94 2023-01-10 thomas static const struct got_error *
378 62ee7d94 2023-01-10 thomas begin_ref_updates(struct gotd_session_client *client, struct imsg *imsg)
380 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_updates_start istart;
381 62ee7d94 2023-01-10 thomas size_t datalen;
383 62ee7d94 2023-01-10 thomas if (client->nref_updates != -1)
384 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
386 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
387 62ee7d94 2023-01-10 thomas if (datalen != sizeof(istart))
388 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
389 62ee7d94 2023-01-10 thomas memcpy(&istart, imsg->data, sizeof(istart));
391 62ee7d94 2023-01-10 thomas if (istart.nref_updates <= 0)
392 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
394 62ee7d94 2023-01-10 thomas client->nref_updates = istart.nref_updates;
395 62ee7d94 2023-01-10 thomas return NULL;
398 62ee7d94 2023-01-10 thomas static const struct got_error *
399 d98779cd 2023-01-19 thomas update_ref(int *shut, struct gotd_session_client *client,
400 d98779cd 2023-01-19 thomas const char *repo_path, struct imsg *imsg)
402 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
403 62ee7d94 2023-01-10 thomas struct got_repository *repo = NULL;
404 62ee7d94 2023-01-10 thomas struct got_reference *ref = NULL;
405 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update iref;
406 62ee7d94 2023-01-10 thomas struct got_object_id old_id, new_id;
407 62ee7d94 2023-01-10 thomas struct got_object_id *id = NULL;
408 62ee7d94 2023-01-10 thomas struct got_object *obj = NULL;
409 62ee7d94 2023-01-10 thomas char *refname = NULL;
410 62ee7d94 2023-01-10 thomas size_t datalen;
411 62ee7d94 2023-01-10 thomas int locked = 0;
412 8a9c582b 2023-06-22 thomas char hex1[SHA1_DIGEST_STRING_LENGTH];
413 8a9c582b 2023-06-22 thomas char hex2[SHA1_DIGEST_STRING_LENGTH];
415 62ee7d94 2023-01-10 thomas log_debug("update-ref from uid %d", client->euid);
417 62ee7d94 2023-01-10 thomas if (client->nref_updates <= 0)
418 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
420 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
421 62ee7d94 2023-01-10 thomas if (datalen < sizeof(iref))
422 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
423 62ee7d94 2023-01-10 thomas memcpy(&iref, imsg->data, sizeof(iref));
424 62ee7d94 2023-01-10 thomas if (datalen != sizeof(iref) + iref.name_len)
425 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
426 fcbb06bf 2023-01-14 thomas refname = strndup(imsg->data + sizeof(iref), iref.name_len);
427 62ee7d94 2023-01-10 thomas if (refname == NULL)
428 fcbb06bf 2023-01-14 thomas return got_error_from_errno("strndup");
430 62ee7d94 2023-01-10 thomas log_debug("updating ref %s for uid %d", refname, client->euid);
432 62ee7d94 2023-01-10 thomas err = got_repo_open(&repo, repo_path, NULL, NULL);
434 62ee7d94 2023-01-10 thomas goto done;
436 62ee7d94 2023-01-10 thomas memcpy(old_id.sha1, iref.old_id, SHA1_DIGEST_LENGTH);
437 62ee7d94 2023-01-10 thomas memcpy(new_id.sha1, iref.new_id, SHA1_DIGEST_LENGTH);
438 49563dfb 2023-01-28 thomas err = got_object_open(&obj, repo,
439 49563dfb 2023-01-28 thomas iref.delete_ref ? &old_id : &new_id);
441 62ee7d94 2023-01-10 thomas goto done;
443 62ee7d94 2023-01-10 thomas if (iref.ref_is_new) {
444 62ee7d94 2023-01-10 thomas err = got_ref_open(&ref, repo, refname, 0);
445 62ee7d94 2023-01-10 thomas if (err) {
446 62ee7d94 2023-01-10 thomas if (err->code != GOT_ERR_NOT_REF)
447 62ee7d94 2023-01-10 thomas goto done;
448 62ee7d94 2023-01-10 thomas err = got_ref_alloc(&ref, refname, &new_id);
450 62ee7d94 2023-01-10 thomas goto done;
451 62ee7d94 2023-01-10 thomas err = got_ref_write(ref, repo); /* will lock/unlock */
453 62ee7d94 2023-01-10 thomas goto done;
455 8a9c582b 2023-06-22 thomas err = got_ref_resolve(&id, repo, ref);
457 8a9c582b 2023-06-22 thomas goto done;
458 8a9c582b 2023-06-22 thomas got_object_id_hex(&new_id, hex1, sizeof(hex1));
459 8a9c582b 2023-06-22 thomas got_object_id_hex(id, hex2, sizeof(hex2));
460 62ee7d94 2023-01-10 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
461 8a9c582b 2023-06-22 thomas "Addition %s: %s failed; %s: %s has been "
462 8a9c582b 2023-06-22 thomas "created by someone else while transaction "
463 8a9c582b 2023-06-22 thomas "was in progress",
464 8a9c582b 2023-06-22 thomas got_ref_get_name(ref), hex1,
465 8a9c582b 2023-06-22 thomas got_ref_get_name(ref), hex2);
466 62ee7d94 2023-01-10 thomas goto done;
468 49563dfb 2023-01-28 thomas } else if (iref.delete_ref) {
469 49563dfb 2023-01-28 thomas err = got_ref_open(&ref, repo, refname, 1 /* lock */);
471 49563dfb 2023-01-28 thomas goto done;
472 49563dfb 2023-01-28 thomas locked = 1;
474 49563dfb 2023-01-28 thomas err = got_ref_resolve(&id, repo, ref);
476 49563dfb 2023-01-28 thomas goto done;
478 49563dfb 2023-01-28 thomas if (got_object_id_cmp(id, &old_id) != 0) {
479 8a9c582b 2023-06-22 thomas got_object_id_hex(&old_id, hex1, sizeof(hex1));
480 8a9c582b 2023-06-22 thomas got_object_id_hex(id, hex2, sizeof(hex2));
481 49563dfb 2023-01-28 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
482 8a9c582b 2023-06-22 thomas "Deletion %s: %s failed; %s: %s has been "
483 8a9c582b 2023-06-22 thomas "created by someone else while transaction "
484 8a9c582b 2023-06-22 thomas "was in progress",
485 8a9c582b 2023-06-22 thomas got_ref_get_name(ref), hex1,
486 8a9c582b 2023-06-22 thomas got_ref_get_name(ref), hex2);
487 49563dfb 2023-01-28 thomas goto done;
490 49563dfb 2023-01-28 thomas err = got_ref_delete(ref, repo);
492 49563dfb 2023-01-28 thomas goto done;
494 49563dfb 2023-01-28 thomas free(id);
495 49563dfb 2023-01-28 thomas id = NULL;
497 62ee7d94 2023-01-10 thomas err = got_ref_open(&ref, repo, refname, 1 /* lock */);
499 62ee7d94 2023-01-10 thomas goto done;
500 62ee7d94 2023-01-10 thomas locked = 1;
502 62ee7d94 2023-01-10 thomas err = got_ref_resolve(&id, repo, ref);
504 62ee7d94 2023-01-10 thomas goto done;
506 62ee7d94 2023-01-10 thomas if (got_object_id_cmp(id, &old_id) != 0) {
507 8a9c582b 2023-06-22 thomas got_object_id_hex(&old_id, hex1, sizeof(hex1));
508 8a9c582b 2023-06-22 thomas got_object_id_hex(id, hex2, sizeof(hex2));
509 62ee7d94 2023-01-10 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
510 8a9c582b 2023-06-22 thomas "Update %s: %s failed; %s: %s has been "
511 8a9c582b 2023-06-22 thomas "created by someone else while transaction "
512 8a9c582b 2023-06-22 thomas "was in progress",
513 8a9c582b 2023-06-22 thomas got_ref_get_name(ref), hex1,
514 8a9c582b 2023-06-22 thomas got_ref_get_name(ref), hex2);
515 62ee7d94 2023-01-10 thomas goto done;
518 169def41 2023-06-22 thomas if (got_object_id_cmp(&new_id, &old_id) != 0) {
519 169def41 2023-06-22 thomas err = got_ref_change_ref(ref, &new_id);
521 169def41 2023-06-22 thomas goto done;
523 169def41 2023-06-22 thomas err = got_ref_write(ref, repo);
525 169def41 2023-06-22 thomas goto done;
528 62ee7d94 2023-01-10 thomas free(id);
529 62ee7d94 2023-01-10 thomas id = NULL;
532 62ee7d94 2023-01-10 thomas if (err) {
533 62ee7d94 2023-01-10 thomas if (err->code == GOT_ERR_LOCKFILE_TIMEOUT) {
534 62ee7d94 2023-01-10 thomas err = got_error_fmt(GOT_ERR_LOCKFILE_TIMEOUT,
535 62ee7d94 2023-01-10 thomas "could not acquire exclusive file lock for %s",
536 62ee7d94 2023-01-10 thomas refname);
538 62ee7d94 2023-01-10 thomas send_ref_update_ng(client, &iref, refname, err->msg);
540 62ee7d94 2023-01-10 thomas send_ref_update_ok(client, &iref, refname);
542 62ee7d94 2023-01-10 thomas if (client->nref_updates > 0) {
543 62ee7d94 2023-01-10 thomas client->nref_updates--;
544 d98779cd 2023-01-19 thomas if (client->nref_updates == 0) {
545 62ee7d94 2023-01-10 thomas send_refs_updated(client);
546 c8b73ac1 2023-08-23 thomas client->flush_disconnect = 1;
550 62ee7d94 2023-01-10 thomas if (locked) {
551 62ee7d94 2023-01-10 thomas const struct got_error *unlock_err;
552 62ee7d94 2023-01-10 thomas unlock_err = got_ref_unlock(ref);
553 62ee7d94 2023-01-10 thomas if (unlock_err && err == NULL)
554 62ee7d94 2023-01-10 thomas err = unlock_err;
557 62ee7d94 2023-01-10 thomas got_ref_close(ref);
559 62ee7d94 2023-01-10 thomas got_object_close(obj);
560 62ee7d94 2023-01-10 thomas if (repo)
561 62ee7d94 2023-01-10 thomas got_repo_close(repo);
562 62ee7d94 2023-01-10 thomas free(refname);
563 62ee7d94 2023-01-10 thomas free(id);
564 62ee7d94 2023-01-10 thomas return err;
567 62ee7d94 2023-01-10 thomas static void
568 62ee7d94 2023-01-10 thomas session_dispatch_repo_child(int fd, short event, void *arg)
570 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = arg;
571 62ee7d94 2023-01-10 thomas struct imsgbuf *ibuf = &iev->ibuf;
572 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
573 62ee7d94 2023-01-10 thomas ssize_t n;
574 62ee7d94 2023-01-10 thomas int shut = 0;
575 62ee7d94 2023-01-10 thomas struct imsg imsg;
577 62ee7d94 2023-01-10 thomas if (event & EV_READ) {
578 62ee7d94 2023-01-10 thomas if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
579 62ee7d94 2023-01-10 thomas fatal("imsg_read error");
580 62ee7d94 2023-01-10 thomas if (n == 0) {
581 62ee7d94 2023-01-10 thomas /* Connection closed. */
582 62ee7d94 2023-01-10 thomas shut = 1;
583 62ee7d94 2023-01-10 thomas goto done;
587 62ee7d94 2023-01-10 thomas if (event & EV_WRITE) {
588 62ee7d94 2023-01-10 thomas n = msgbuf_write(&ibuf->w);
589 62ee7d94 2023-01-10 thomas if (n == -1 && errno != EAGAIN)
590 62ee7d94 2023-01-10 thomas fatal("msgbuf_write");
591 62ee7d94 2023-01-10 thomas if (n == 0) {
592 62ee7d94 2023-01-10 thomas /* Connection closed. */
593 62ee7d94 2023-01-10 thomas shut = 1;
594 62ee7d94 2023-01-10 thomas goto done;
598 62ee7d94 2023-01-10 thomas for (;;) {
599 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
600 62ee7d94 2023-01-10 thomas uint32_t client_id = 0;
601 62ee7d94 2023-01-10 thomas int do_disconnect = 0;
602 62ee7d94 2023-01-10 thomas int do_ref_updates = 0, do_ref_update = 0;
603 62ee7d94 2023-01-10 thomas int do_packfile_install = 0;
605 62ee7d94 2023-01-10 thomas if ((n = imsg_get(ibuf, &imsg)) == -1)
606 62ee7d94 2023-01-10 thomas fatal("%s: imsg_get error", __func__);
607 62ee7d94 2023-01-10 thomas if (n == 0) /* No more messages. */
610 62ee7d94 2023-01-10 thomas switch (imsg.hdr.type) {
611 62ee7d94 2023-01-10 thomas case GOTD_IMSG_ERROR:
612 62ee7d94 2023-01-10 thomas do_disconnect = 1;
613 62ee7d94 2023-01-10 thomas err = gotd_imsg_recv_error(&client_id, &imsg);
615 62ee7d94 2023-01-10 thomas case GOTD_IMSG_PACKFILE_DONE:
616 62ee7d94 2023-01-10 thomas do_disconnect = 1;
617 62ee7d94 2023-01-10 thomas err = recv_packfile_done(&client_id, &imsg);
619 62ee7d94 2023-01-10 thomas case GOTD_IMSG_PACKFILE_INSTALL:
620 62ee7d94 2023-01-10 thomas err = recv_packfile_install(&client_id, &imsg);
621 62ee7d94 2023-01-10 thomas if (err == NULL)
622 62ee7d94 2023-01-10 thomas do_packfile_install = 1;
624 62ee7d94 2023-01-10 thomas case GOTD_IMSG_REF_UPDATES_START:
625 62ee7d94 2023-01-10 thomas err = recv_ref_updates_start(&client_id, &imsg);
626 62ee7d94 2023-01-10 thomas if (err == NULL)
627 62ee7d94 2023-01-10 thomas do_ref_updates = 1;
629 62ee7d94 2023-01-10 thomas case GOTD_IMSG_REF_UPDATE:
630 62ee7d94 2023-01-10 thomas err = recv_ref_update(&client_id, &imsg);
631 62ee7d94 2023-01-10 thomas if (err == NULL)
632 62ee7d94 2023-01-10 thomas do_ref_update = 1;
635 62ee7d94 2023-01-10 thomas log_debug("unexpected imsg %d", imsg.hdr.type);
639 62ee7d94 2023-01-10 thomas if (do_disconnect) {
641 62ee7d94 2023-01-10 thomas disconnect_on_error(client, err);
643 62ee7d94 2023-01-10 thomas disconnect(client);
645 62ee7d94 2023-01-10 thomas if (do_packfile_install)
646 62ee7d94 2023-01-10 thomas err = install_pack(client,
647 62ee7d94 2023-01-10 thomas gotd_session.repo->path, &imsg);
648 62ee7d94 2023-01-10 thomas else if (do_ref_updates)
649 62ee7d94 2023-01-10 thomas err = begin_ref_updates(client, &imsg);
650 62ee7d94 2023-01-10 thomas else if (do_ref_update)
651 d98779cd 2023-01-19 thomas err = update_ref(&shut, client,
652 62ee7d94 2023-01-10 thomas gotd_session.repo->path, &imsg);
654 62ee7d94 2023-01-10 thomas log_warnx("uid %d: %s", client->euid, err->msg);
656 62ee7d94 2023-01-10 thomas imsg_free(&imsg);
659 62ee7d94 2023-01-10 thomas if (!shut) {
660 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(iev);
662 62ee7d94 2023-01-10 thomas /* This pipe is dead. Remove its event handler */
663 62ee7d94 2023-01-10 thomas event_del(&iev->ev);
664 62ee7d94 2023-01-10 thomas event_loopexit(NULL);
668 62ee7d94 2023-01-10 thomas static const struct got_error *
669 62ee7d94 2023-01-10 thomas recv_capabilities(struct gotd_session_client *client, struct imsg *imsg)
671 62ee7d94 2023-01-10 thomas struct gotd_imsg_capabilities icapas;
672 62ee7d94 2023-01-10 thomas size_t datalen;
674 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
675 62ee7d94 2023-01-10 thomas if (datalen != sizeof(icapas))
676 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
677 62ee7d94 2023-01-10 thomas memcpy(&icapas, imsg->data, sizeof(icapas));
679 62ee7d94 2023-01-10 thomas client->ncapa_alloc = icapas.ncapabilities;
680 62ee7d94 2023-01-10 thomas client->capabilities = calloc(client->ncapa_alloc,
681 62ee7d94 2023-01-10 thomas sizeof(*client->capabilities));
682 62ee7d94 2023-01-10 thomas if (client->capabilities == NULL) {
683 62ee7d94 2023-01-10 thomas client->ncapa_alloc = 0;
684 62ee7d94 2023-01-10 thomas return got_error_from_errno("calloc");
687 62ee7d94 2023-01-10 thomas log_debug("expecting %zu capabilities from uid %d",
688 62ee7d94 2023-01-10 thomas client->ncapa_alloc, client->euid);
689 62ee7d94 2023-01-10 thomas return NULL;
692 62ee7d94 2023-01-10 thomas static const struct got_error *
693 62ee7d94 2023-01-10 thomas recv_capability(struct gotd_session_client *client, struct imsg *imsg)
695 62ee7d94 2023-01-10 thomas struct gotd_imsg_capability icapa;
696 62ee7d94 2023-01-10 thomas struct gotd_client_capability *capa;
697 62ee7d94 2023-01-10 thomas size_t datalen;
698 62ee7d94 2023-01-10 thomas char *key, *value = NULL;
700 62ee7d94 2023-01-10 thomas if (client->capabilities == NULL ||
701 62ee7d94 2023-01-10 thomas client->ncapabilities >= client->ncapa_alloc) {
702 62ee7d94 2023-01-10 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
703 62ee7d94 2023-01-10 thomas "unexpected capability received");
706 62ee7d94 2023-01-10 thomas memset(&icapa, 0, sizeof(icapa));
708 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
709 62ee7d94 2023-01-10 thomas if (datalen < sizeof(icapa))
710 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
711 62ee7d94 2023-01-10 thomas memcpy(&icapa, imsg->data, sizeof(icapa));
713 62ee7d94 2023-01-10 thomas if (datalen != sizeof(icapa) + icapa.key_len + icapa.value_len)
714 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
716 fcbb06bf 2023-01-14 thomas key = strndup(imsg->data + sizeof(icapa), icapa.key_len);
717 62ee7d94 2023-01-10 thomas if (key == NULL)
718 fcbb06bf 2023-01-14 thomas return got_error_from_errno("strndup");
719 62ee7d94 2023-01-10 thomas if (icapa.value_len > 0) {
720 fcbb06bf 2023-01-14 thomas value = strndup(imsg->data + sizeof(icapa) + icapa.key_len,
721 fcbb06bf 2023-01-14 thomas icapa.value_len);
722 62ee7d94 2023-01-10 thomas if (value == NULL) {
723 62ee7d94 2023-01-10 thomas free(key);
724 fcbb06bf 2023-01-14 thomas return got_error_from_errno("strndup");
728 62ee7d94 2023-01-10 thomas capa = &client->capabilities[client->ncapabilities++];
729 62ee7d94 2023-01-10 thomas capa->key = key;
730 62ee7d94 2023-01-10 thomas capa->value = value;
732 62ee7d94 2023-01-10 thomas if (value)
733 62ee7d94 2023-01-10 thomas log_debug("uid %d: capability %s=%s", client->euid, key, value);
735 62ee7d94 2023-01-10 thomas log_debug("uid %d: capability %s", client->euid, key);
737 62ee7d94 2023-01-10 thomas return NULL;
740 62ee7d94 2023-01-10 thomas static const struct got_error *
741 62ee7d94 2023-01-10 thomas ensure_client_is_reading(struct gotd_session_client *client)
743 62ee7d94 2023-01-10 thomas if (client->is_writing) {
744 62ee7d94 2023-01-10 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
745 62ee7d94 2023-01-10 thomas "uid %d made a read-request but is not reading from "
746 62ee7d94 2023-01-10 thomas "a repository", client->euid);
749 62ee7d94 2023-01-10 thomas return NULL;
752 62ee7d94 2023-01-10 thomas static const struct got_error *
753 62ee7d94 2023-01-10 thomas ensure_client_is_writing(struct gotd_session_client *client)
755 62ee7d94 2023-01-10 thomas if (!client->is_writing) {
756 62ee7d94 2023-01-10 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
757 62ee7d94 2023-01-10 thomas "uid %d made a write-request but is not writing to "
758 62ee7d94 2023-01-10 thomas "a repository", client->euid);
761 62ee7d94 2023-01-10 thomas return NULL;
764 62ee7d94 2023-01-10 thomas static const struct got_error *
765 62ee7d94 2023-01-10 thomas forward_want(struct gotd_session_client *client, struct imsg *imsg)
767 62ee7d94 2023-01-10 thomas struct gotd_imsg_want ireq;
768 62ee7d94 2023-01-10 thomas struct gotd_imsg_want iwant;
769 62ee7d94 2023-01-10 thomas size_t datalen;
771 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
772 62ee7d94 2023-01-10 thomas if (datalen != sizeof(ireq))
773 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
775 62ee7d94 2023-01-10 thomas memcpy(&ireq, imsg->data, datalen);
777 62ee7d94 2023-01-10 thomas memset(&iwant, 0, sizeof(iwant));
778 62ee7d94 2023-01-10 thomas memcpy(iwant.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
779 62ee7d94 2023-01-10 thomas iwant.client_id = client->id;
781 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev, GOTD_IMSG_WANT,
782 7fed8fa4 2023-06-22 thomas gotd_session.proc_id, -1, &iwant, sizeof(iwant)) == -1)
783 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg compose WANT");
785 62ee7d94 2023-01-10 thomas return NULL;
788 62ee7d94 2023-01-10 thomas static const struct got_error *
789 62ee7d94 2023-01-10 thomas forward_ref_update(struct gotd_session_client *client, struct imsg *imsg)
791 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
792 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update ireq;
793 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update *iref = NULL;
794 62ee7d94 2023-01-10 thomas size_t datalen;
796 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
797 62ee7d94 2023-01-10 thomas if (datalen < sizeof(ireq))
798 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
799 62ee7d94 2023-01-10 thomas memcpy(&ireq, imsg->data, sizeof(ireq));
800 62ee7d94 2023-01-10 thomas if (datalen != sizeof(ireq) + ireq.name_len)
801 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
803 62ee7d94 2023-01-10 thomas iref = malloc(datalen);
804 62ee7d94 2023-01-10 thomas if (iref == NULL)
805 62ee7d94 2023-01-10 thomas return got_error_from_errno("malloc");
806 62ee7d94 2023-01-10 thomas memcpy(iref, imsg->data, datalen);
808 62ee7d94 2023-01-10 thomas iref->client_id = client->id;
809 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
810 7fed8fa4 2023-06-22 thomas GOTD_IMSG_REF_UPDATE, gotd_session.proc_id, -1,
811 7fed8fa4 2023-06-22 thomas iref, datalen) == -1)
812 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose REF_UPDATE");
813 62ee7d94 2023-01-10 thomas free(iref);
814 62ee7d94 2023-01-10 thomas return err;
817 62ee7d94 2023-01-10 thomas static const struct got_error *
818 62ee7d94 2023-01-10 thomas forward_have(struct gotd_session_client *client, struct imsg *imsg)
820 62ee7d94 2023-01-10 thomas struct gotd_imsg_have ireq;
821 62ee7d94 2023-01-10 thomas struct gotd_imsg_have ihave;
822 62ee7d94 2023-01-10 thomas size_t datalen;
824 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
825 62ee7d94 2023-01-10 thomas if (datalen != sizeof(ireq))
826 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
828 62ee7d94 2023-01-10 thomas memcpy(&ireq, imsg->data, datalen);
830 62ee7d94 2023-01-10 thomas memset(&ihave, 0, sizeof(ihave));
831 62ee7d94 2023-01-10 thomas memcpy(ihave.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
832 62ee7d94 2023-01-10 thomas ihave.client_id = client->id;
834 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev, GOTD_IMSG_HAVE,
835 7fed8fa4 2023-06-22 thomas gotd_session.proc_id, -1, &ihave, sizeof(ihave)) == -1)
836 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg compose HAVE");
838 62ee7d94 2023-01-10 thomas return NULL;
841 62ee7d94 2023-01-10 thomas static int
842 62ee7d94 2023-01-10 thomas client_has_capability(struct gotd_session_client *client, const char *capastr)
844 62ee7d94 2023-01-10 thomas struct gotd_client_capability *capa;
845 62ee7d94 2023-01-10 thomas size_t i;
847 62ee7d94 2023-01-10 thomas if (client->ncapabilities == 0)
848 62ee7d94 2023-01-10 thomas return 0;
850 62ee7d94 2023-01-10 thomas for (i = 0; i < client->ncapabilities; i++) {
851 62ee7d94 2023-01-10 thomas capa = &client->capabilities[i];
852 62ee7d94 2023-01-10 thomas if (strcmp(capa->key, capastr) == 0)
853 62ee7d94 2023-01-10 thomas return 1;
856 62ee7d94 2023-01-10 thomas return 0;
859 62ee7d94 2023-01-10 thomas static const struct got_error *
860 62ee7d94 2023-01-10 thomas recv_packfile(struct gotd_session_client *client)
862 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
863 62ee7d94 2023-01-10 thomas struct gotd_imsg_recv_packfile ipack;
864 62ee7d94 2023-01-10 thomas struct gotd_imsg_packfile_pipe ipipe;
865 62ee7d94 2023-01-10 thomas struct gotd_imsg_packidx_file ifile;
866 62ee7d94 2023-01-10 thomas char *basepath = NULL, *pack_path = NULL, *idx_path = NULL;
867 62ee7d94 2023-01-10 thomas int packfd = -1, idxfd = -1;
868 62ee7d94 2023-01-10 thomas int pipe[2] = { -1, -1 };
870 62ee7d94 2023-01-10 thomas if (client->packfile_path) {
871 62ee7d94 2023-01-10 thomas return got_error_fmt(GOT_ERR_PRIVSEP_MSG,
872 62ee7d94 2023-01-10 thomas "uid %d already has a pack file", client->euid);
875 62ee7d94 2023-01-10 thomas if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
876 62ee7d94 2023-01-10 thomas return got_error_from_errno("socketpair");
878 62ee7d94 2023-01-10 thomas memset(&ipipe, 0, sizeof(ipipe));
879 62ee7d94 2023-01-10 thomas ipipe.client_id = client->id;
881 62ee7d94 2023-01-10 thomas /* Send pack pipe end 0 to repo child process. */
882 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
883 7fed8fa4 2023-06-22 thomas GOTD_IMSG_PACKFILE_PIPE, gotd_session.proc_id, pipe[0],
884 62ee7d94 2023-01-10 thomas &ipipe, sizeof(ipipe)) == -1) {
885 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
886 62ee7d94 2023-01-10 thomas pipe[0] = -1;
887 62ee7d94 2023-01-10 thomas goto done;
889 62ee7d94 2023-01-10 thomas pipe[0] = -1;
891 62ee7d94 2023-01-10 thomas /* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
892 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->iev,
893 7fed8fa4 2023-06-22 thomas GOTD_IMSG_PACKFILE_PIPE, gotd_session.proc_id, pipe[1],
894 7fed8fa4 2023-06-22 thomas NULL, 0) == -1)
895 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
896 62ee7d94 2023-01-10 thomas pipe[1] = -1;
898 62ee7d94 2023-01-10 thomas if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.pack",
899 62ee7d94 2023-01-10 thomas got_repo_get_path(gotd_session.repo), GOT_OBJECTS_PACK_DIR,
900 62ee7d94 2023-01-10 thomas client->euid) == -1) {
901 62ee7d94 2023-01-10 thomas err = got_error_from_errno("asprintf");
902 62ee7d94 2023-01-10 thomas goto done;
905 62ee7d94 2023-01-10 thomas err = got_opentemp_named_fd(&pack_path, &packfd, basepath, "");
907 62ee7d94 2023-01-10 thomas goto done;
908 851a5b48 2023-02-03 thomas if (fchmod(packfd, GOT_DEFAULT_PACK_MODE) == -1) {
909 851a5b48 2023-02-03 thomas err = got_error_from_errno2("fchmod", pack_path);
910 851a5b48 2023-02-03 thomas goto done;
913 62ee7d94 2023-01-10 thomas free(basepath);
914 62ee7d94 2023-01-10 thomas if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.idx",
915 62ee7d94 2023-01-10 thomas got_repo_get_path(gotd_session.repo), GOT_OBJECTS_PACK_DIR,
916 62ee7d94 2023-01-10 thomas client->euid) == -1) {
917 62ee7d94 2023-01-10 thomas err = got_error_from_errno("asprintf");
918 62ee7d94 2023-01-10 thomas basepath = NULL;
919 62ee7d94 2023-01-10 thomas goto done;
921 62ee7d94 2023-01-10 thomas err = got_opentemp_named_fd(&idx_path, &idxfd, basepath, "");
923 62ee7d94 2023-01-10 thomas goto done;
924 851a5b48 2023-02-03 thomas if (fchmod(idxfd, GOT_DEFAULT_PACK_MODE) == -1) {
925 851a5b48 2023-02-03 thomas err = got_error_from_errno2("fchmod", idx_path);
926 851a5b48 2023-02-03 thomas goto done;
929 62ee7d94 2023-01-10 thomas memset(&ifile, 0, sizeof(ifile));
930 62ee7d94 2023-01-10 thomas ifile.client_id = client->id;
931 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
932 7fed8fa4 2023-06-22 thomas GOTD_IMSG_PACKIDX_FILE, gotd_session.proc_id,
933 62ee7d94 2023-01-10 thomas idxfd, &ifile, sizeof(ifile)) == -1) {
934 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose PACKIDX_FILE");
935 62ee7d94 2023-01-10 thomas idxfd = -1;
936 62ee7d94 2023-01-10 thomas goto done;
938 62ee7d94 2023-01-10 thomas idxfd = -1;
940 62ee7d94 2023-01-10 thomas memset(&ipack, 0, sizeof(ipack));
941 62ee7d94 2023-01-10 thomas ipack.client_id = client->id;
942 62ee7d94 2023-01-10 thomas if (client_has_capability(client, GOT_CAPA_REPORT_STATUS))
943 62ee7d94 2023-01-10 thomas ipack.report_status = 1;
945 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
946 7fed8fa4 2023-06-22 thomas GOTD_IMSG_RECV_PACKFILE, gotd_session.proc_id, packfd,
947 62ee7d94 2023-01-10 thomas &ipack, sizeof(ipack)) == -1) {
948 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose RECV_PACKFILE");
949 62ee7d94 2023-01-10 thomas packfd = -1;
950 62ee7d94 2023-01-10 thomas goto done;
952 62ee7d94 2023-01-10 thomas packfd = -1;
955 62ee7d94 2023-01-10 thomas free(basepath);
956 62ee7d94 2023-01-10 thomas if (pipe[0] != -1 && close(pipe[0]) == -1 && err == NULL)
957 62ee7d94 2023-01-10 thomas err = got_error_from_errno("close");
958 62ee7d94 2023-01-10 thomas if (pipe[1] != -1 && close(pipe[1]) == -1 && err == NULL)
959 62ee7d94 2023-01-10 thomas err = got_error_from_errno("close");
960 62ee7d94 2023-01-10 thomas if (packfd != -1 && close(packfd) == -1 && err == NULL)
961 62ee7d94 2023-01-10 thomas err = got_error_from_errno("close");
962 62ee7d94 2023-01-10 thomas if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
963 62ee7d94 2023-01-10 thomas err = got_error_from_errno("close");
964 62ee7d94 2023-01-10 thomas if (err) {
965 62ee7d94 2023-01-10 thomas free(pack_path);
966 62ee7d94 2023-01-10 thomas free(idx_path);
968 62ee7d94 2023-01-10 thomas client->packfile_path = pack_path;
969 62ee7d94 2023-01-10 thomas client->packidx_path = idx_path;
971 62ee7d94 2023-01-10 thomas return err;
974 62ee7d94 2023-01-10 thomas static const struct got_error *
975 62ee7d94 2023-01-10 thomas send_packfile(struct gotd_session_client *client)
977 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
978 62ee7d94 2023-01-10 thomas struct gotd_imsg_send_packfile ipack;
979 62ee7d94 2023-01-10 thomas struct gotd_imsg_packfile_pipe ipipe;
980 62ee7d94 2023-01-10 thomas int pipe[2];
982 62ee7d94 2023-01-10 thomas if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
983 62ee7d94 2023-01-10 thomas return got_error_from_errno("socketpair");
985 62ee7d94 2023-01-10 thomas memset(&ipack, 0, sizeof(ipack));
986 62ee7d94 2023-01-10 thomas memset(&ipipe, 0, sizeof(ipipe));
988 62ee7d94 2023-01-10 thomas ipack.client_id = client->id;
989 62ee7d94 2023-01-10 thomas if (client_has_capability(client, GOT_CAPA_SIDE_BAND_64K))
990 62ee7d94 2023-01-10 thomas ipack.report_progress = 1;
992 62ee7d94 2023-01-10 thomas client->delta_cache_fd = got_opentempfd();
993 62ee7d94 2023-01-10 thomas if (client->delta_cache_fd == -1)
994 62ee7d94 2023-01-10 thomas return got_error_from_errno("got_opentempfd");
996 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
997 62ee7d94 2023-01-10 thomas GOTD_IMSG_SEND_PACKFILE, PROC_GOTD, client->delta_cache_fd,
998 62ee7d94 2023-01-10 thomas &ipack, sizeof(ipack)) == -1) {
999 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose SEND_PACKFILE");
1000 62ee7d94 2023-01-10 thomas close(pipe[0]);
1001 62ee7d94 2023-01-10 thomas close(pipe[1]);
1002 62ee7d94 2023-01-10 thomas return err;
1005 62ee7d94 2023-01-10 thomas ipipe.client_id = client->id;
1007 62ee7d94 2023-01-10 thomas /* Send pack pipe end 0 to repo child process. */
1008 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
1009 62ee7d94 2023-01-10 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD,
1010 62ee7d94 2023-01-10 thomas pipe[0], &ipipe, sizeof(ipipe)) == -1) {
1011 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
1012 62ee7d94 2023-01-10 thomas close(pipe[1]);
1013 62ee7d94 2023-01-10 thomas return err;
1016 62ee7d94 2023-01-10 thomas /* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
1017 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->iev,
1018 62ee7d94 2023-01-10 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1], NULL, 0) == -1)
1019 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
1021 62ee7d94 2023-01-10 thomas return err;
1024 62ee7d94 2023-01-10 thomas static void
1025 8cb46987 2023-02-07 thomas session_dispatch_client(int fd, short events, void *arg)
1027 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = arg;
1028 62ee7d94 2023-01-10 thomas struct imsgbuf *ibuf = &iev->ibuf;
1029 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
1030 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
1031 62ee7d94 2023-01-10 thomas struct imsg imsg;
1032 62ee7d94 2023-01-10 thomas ssize_t n;
1034 62ee7d94 2023-01-10 thomas if (events & EV_WRITE) {
1035 62ee7d94 2023-01-10 thomas while (ibuf->w.queued) {
1036 62ee7d94 2023-01-10 thomas n = msgbuf_write(&ibuf->w);
1037 62ee7d94 2023-01-10 thomas if (n == -1 && errno == EPIPE) {
1039 62ee7d94 2023-01-10 thomas * The client has closed its socket.
1040 62ee7d94 2023-01-10 thomas * This can happen when Git clients are
1041 62ee7d94 2023-01-10 thomas * done sending pack file data.
1043 62ee7d94 2023-01-10 thomas msgbuf_clear(&ibuf->w);
1044 62ee7d94 2023-01-10 thomas continue;
1045 62ee7d94 2023-01-10 thomas } else if (n == -1 && errno != EAGAIN) {
1046 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg_flush");
1047 62ee7d94 2023-01-10 thomas disconnect_on_error(client, err);
1050 62ee7d94 2023-01-10 thomas if (n == 0) {
1051 62ee7d94 2023-01-10 thomas /* Connection closed. */
1052 62ee7d94 2023-01-10 thomas err = got_error(GOT_ERR_EOF);
1053 62ee7d94 2023-01-10 thomas disconnect_on_error(client, err);
1058 c8b73ac1 2023-08-23 thomas if (client->flush_disconnect) {
1059 c8b73ac1 2023-08-23 thomas disconnect(client);
1064 62ee7d94 2023-01-10 thomas if ((events & EV_READ) == 0)
1067 62ee7d94 2023-01-10 thomas memset(&imsg, 0, sizeof(imsg));
1069 62ee7d94 2023-01-10 thomas while (err == NULL) {
1070 62ee7d94 2023-01-10 thomas err = gotd_imsg_recv(&imsg, ibuf, 0);
1071 62ee7d94 2023-01-10 thomas if (err) {
1072 62ee7d94 2023-01-10 thomas if (err->code == GOT_ERR_PRIVSEP_READ)
1073 62ee7d94 2023-01-10 thomas err = NULL;
1074 8e92c55c 2023-06-08 thomas else if (err->code == GOT_ERR_EOF &&
1075 8e92c55c 2023-06-08 thomas client->state == GOTD_STATE_EXPECT_CAPABILITIES) {
1077 8e92c55c 2023-06-08 thomas * The client has closed its socket before
1078 8e92c55c 2023-06-08 thomas * sending its capability announcement.
1079 8e92c55c 2023-06-08 thomas * This can happen when Git clients have
1080 8e92c55c 2023-06-08 thomas * no ref-updates to send.
1082 8e92c55c 2023-06-08 thomas disconnect_on_error(client, err);
1088 62ee7d94 2023-01-10 thomas evtimer_del(&client->tmo);
1090 62ee7d94 2023-01-10 thomas switch (imsg.hdr.type) {
1091 62ee7d94 2023-01-10 thomas case GOTD_IMSG_CAPABILITIES:
1092 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1093 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1094 62ee7d94 2023-01-10 thomas "unexpected capabilities received");
1097 62ee7d94 2023-01-10 thomas log_debug("receiving capabilities from uid %d",
1098 62ee7d94 2023-01-10 thomas client->euid);
1099 62ee7d94 2023-01-10 thomas err = recv_capabilities(client, &imsg);
1101 62ee7d94 2023-01-10 thomas case GOTD_IMSG_CAPABILITY:
1102 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1103 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1104 62ee7d94 2023-01-10 thomas "unexpected capability received");
1107 62ee7d94 2023-01-10 thomas err = recv_capability(client, &imsg);
1108 62ee7d94 2023-01-10 thomas if (err || client->ncapabilities < client->ncapa_alloc)
1110 62ee7d94 2023-01-10 thomas if (!client->is_writing) {
1111 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_WANT;
1112 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1113 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting want-lines",
1114 62ee7d94 2023-01-10 thomas client->euid);
1115 62ee7d94 2023-01-10 thomas } else if (client->is_writing) {
1116 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_REF_UPDATE;
1117 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1118 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting ref-update-lines",
1119 62ee7d94 2023-01-10 thomas client->euid);
1121 62ee7d94 2023-01-10 thomas fatalx("client %d is both reading and writing",
1122 62ee7d94 2023-01-10 thomas client->euid);
1124 62ee7d94 2023-01-10 thomas case GOTD_IMSG_WANT:
1125 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_WANT) {
1126 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1127 62ee7d94 2023-01-10 thomas "unexpected want-line received");
1130 62ee7d94 2023-01-10 thomas log_debug("received want-line from uid %d",
1131 62ee7d94 2023-01-10 thomas client->euid);
1132 62ee7d94 2023-01-10 thomas err = ensure_client_is_reading(client);
1133 62ee7d94 2023-01-10 thomas if (err)
1135 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1136 62ee7d94 2023-01-10 thomas err = forward_want(client, &imsg);
1138 62ee7d94 2023-01-10 thomas case GOTD_IMSG_REF_UPDATE:
1139 0445d8ec 2023-01-19 thomas if (client->state != GOTD_STATE_EXPECT_REF_UPDATE &&
1140 0445d8ec 2023-01-19 thomas client->state !=
1141 0445d8ec 2023-01-19 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1142 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1143 62ee7d94 2023-01-10 thomas "unexpected ref-update-line received");
1146 62ee7d94 2023-01-10 thomas log_debug("received ref-update-line from uid %d",
1147 62ee7d94 2023-01-10 thomas client->euid);
1148 62ee7d94 2023-01-10 thomas err = ensure_client_is_writing(client);
1149 62ee7d94 2023-01-10 thomas if (err)
1151 62ee7d94 2023-01-10 thomas err = forward_ref_update(client, &imsg);
1152 62ee7d94 2023-01-10 thomas if (err)
1154 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_MORE_REF_UPDATES;
1155 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1157 62ee7d94 2023-01-10 thomas case GOTD_IMSG_HAVE:
1158 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_HAVE) {
1159 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1160 62ee7d94 2023-01-10 thomas "unexpected have-line received");
1163 62ee7d94 2023-01-10 thomas log_debug("received have-line from uid %d",
1164 62ee7d94 2023-01-10 thomas client->euid);
1165 62ee7d94 2023-01-10 thomas err = ensure_client_is_reading(client);
1166 62ee7d94 2023-01-10 thomas if (err)
1168 62ee7d94 2023-01-10 thomas err = forward_have(client, &imsg);
1169 62ee7d94 2023-01-10 thomas if (err)
1171 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1173 62ee7d94 2023-01-10 thomas case GOTD_IMSG_FLUSH:
1174 62ee7d94 2023-01-10 thomas if (client->state == GOTD_STATE_EXPECT_WANT ||
1175 62ee7d94 2023-01-10 thomas client->state == GOTD_STATE_EXPECT_HAVE) {
1176 62ee7d94 2023-01-10 thomas err = ensure_client_is_reading(client);
1177 62ee7d94 2023-01-10 thomas if (err)
1179 62ee7d94 2023-01-10 thomas } else if (client->state ==
1180 62ee7d94 2023-01-10 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1181 62ee7d94 2023-01-10 thomas err = ensure_client_is_writing(client);
1182 62ee7d94 2023-01-10 thomas if (err)
1184 6110f5ef 2023-01-19 thomas } else if (client->state != GOTD_STATE_EXPECT_DONE) {
1185 98c7fd82 2023-01-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1186 98c7fd82 2023-01-23 thomas "unexpected flush-pkt received");
1189 98c7fd82 2023-01-23 thomas if (!client->accept_flush_pkt) {
1190 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1191 62ee7d94 2023-01-10 thomas "unexpected flush-pkt received");
1196 98c7fd82 2023-01-23 thomas * Accept just one flush packet at a time.
1197 98c7fd82 2023-01-23 thomas * Future client state transitions will set this flag
1198 98c7fd82 2023-01-23 thomas * again if another flush packet is expected.
1200 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 0;
1202 62ee7d94 2023-01-10 thomas log_debug("received flush-pkt from uid %d",
1203 62ee7d94 2023-01-10 thomas client->euid);
1204 62ee7d94 2023-01-10 thomas if (client->state == GOTD_STATE_EXPECT_WANT) {
1205 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_HAVE;
1206 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting have-lines",
1207 62ee7d94 2023-01-10 thomas client->euid);
1208 62ee7d94 2023-01-10 thomas } else if (client->state == GOTD_STATE_EXPECT_HAVE) {
1209 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_DONE;
1210 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1211 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting 'done'",
1212 62ee7d94 2023-01-10 thomas client->euid);
1213 62ee7d94 2023-01-10 thomas } else if (client->state ==
1214 62ee7d94 2023-01-10 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1215 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_PACKFILE;
1216 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting packfile",
1217 62ee7d94 2023-01-10 thomas client->euid);
1218 62ee7d94 2023-01-10 thomas err = recv_packfile(client);
1219 6110f5ef 2023-01-19 thomas } else if (client->state != GOTD_STATE_EXPECT_DONE) {
1220 62ee7d94 2023-01-10 thomas /* should not happen, see above */
1221 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1222 62ee7d94 2023-01-10 thomas "unexpected client state");
1226 62ee7d94 2023-01-10 thomas case GOTD_IMSG_DONE:
1227 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_HAVE &&
1228 62ee7d94 2023-01-10 thomas client->state != GOTD_STATE_EXPECT_DONE) {
1229 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1230 62ee7d94 2023-01-10 thomas "unexpected flush-pkt received");
1233 62ee7d94 2023-01-10 thomas log_debug("received 'done' from uid %d", client->euid);
1234 62ee7d94 2023-01-10 thomas err = ensure_client_is_reading(client);
1235 62ee7d94 2023-01-10 thomas if (err)
1237 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_DONE;
1238 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1239 62ee7d94 2023-01-10 thomas err = send_packfile(client);
1241 62ee7d94 2023-01-10 thomas default:
1242 62ee7d94 2023-01-10 thomas log_debug("unexpected imsg %d", imsg.hdr.type);
1243 62ee7d94 2023-01-10 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
1247 62ee7d94 2023-01-10 thomas imsg_free(&imsg);
1250 62ee7d94 2023-01-10 thomas if (err) {
1251 62ee7d94 2023-01-10 thomas if (err->code != GOT_ERR_EOF ||
1252 62ee7d94 2023-01-10 thomas client->state != GOTD_STATE_EXPECT_PACKFILE)
1253 62ee7d94 2023-01-10 thomas disconnect_on_error(client, err);
1254 62ee7d94 2023-01-10 thomas } else {
1255 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(iev);
1256 62ee7d94 2023-01-10 thomas evtimer_add(&client->tmo, &gotd_session.request_timeout);
1260 62ee7d94 2023-01-10 thomas static const struct got_error *
1261 62ee7d94 2023-01-10 thomas list_refs_request(void)
1263 62ee7d94 2023-01-10 thomas static const struct got_error *err;
1264 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
1265 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = &client->repo_child_iev;
1266 62ee7d94 2023-01-10 thomas struct gotd_imsg_list_refs_internal ilref;
1269 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1270 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1272 62ee7d94 2023-01-10 thomas memset(&ilref, 0, sizeof(ilref));
1273 62ee7d94 2023-01-10 thomas ilref.client_id = client->id;
1275 62ee7d94 2023-01-10 thomas fd = dup(client->fd);
1276 62ee7d94 2023-01-10 thomas if (fd == -1)
1277 62ee7d94 2023-01-10 thomas return got_error_from_errno("dup");
1279 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(iev, GOTD_IMSG_LIST_REFS_INTERNAL,
1280 7fed8fa4 2023-06-22 thomas gotd_session.proc_id, fd, &ilref, sizeof(ilref)) == -1) {
1281 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose LIST_REFS_INTERNAL");
1282 62ee7d94 2023-01-10 thomas close(fd);
1283 62ee7d94 2023-01-10 thomas return err;
1286 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_CAPABILITIES;
1287 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting capabilities", client->euid);
1288 62ee7d94 2023-01-10 thomas return NULL;
1291 62ee7d94 2023-01-10 thomas static const struct got_error *
1292 62ee7d94 2023-01-10 thomas recv_connect(struct imsg *imsg)
1294 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
1295 62ee7d94 2023-01-10 thomas struct gotd_imsg_connect iconnect;
1296 62ee7d94 2023-01-10 thomas size_t datalen;
1298 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1299 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1301 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1302 62ee7d94 2023-01-10 thomas if (datalen != sizeof(iconnect))
1303 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1304 62ee7d94 2023-01-10 thomas memcpy(&iconnect, imsg->data, sizeof(iconnect));
1306 62ee7d94 2023-01-10 thomas if (imsg->fd == -1)
1307 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_NO_FD);
1309 62ee7d94 2023-01-10 thomas client->fd = imsg->fd;
1310 62ee7d94 2023-01-10 thomas client->euid = iconnect.euid;
1311 62ee7d94 2023-01-10 thomas client->egid = iconnect.egid;
1313 62ee7d94 2023-01-10 thomas imsg_init(&client->iev.ibuf, client->fd);
1314 8cb46987 2023-02-07 thomas client->iev.handler = session_dispatch_client;
1315 62ee7d94 2023-01-10 thomas client->iev.events = EV_READ;
1316 62ee7d94 2023-01-10 thomas client->iev.handler_arg = NULL;
1317 62ee7d94 2023-01-10 thomas event_set(&client->iev.ev, client->iev.ibuf.fd, EV_READ,
1318 8cb46987 2023-02-07 thomas session_dispatch_client, &client->iev);
1319 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(&client->iev);
1320 62ee7d94 2023-01-10 thomas evtimer_set(&client->tmo, gotd_request_timeout, client);
1322 62ee7d94 2023-01-10 thomas return NULL;
1325 62ee7d94 2023-01-10 thomas static const struct got_error *
1326 62ee7d94 2023-01-10 thomas recv_repo_child(struct imsg *imsg)
1328 62ee7d94 2023-01-10 thomas struct gotd_imsg_connect_repo_child ichild;
1329 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
1330 62ee7d94 2023-01-10 thomas size_t datalen;
1332 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1333 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1335 62ee7d94 2023-01-10 thomas /* We should already have received a pipe to the listener. */
1336 62ee7d94 2023-01-10 thomas if (client->fd == -1)
1337 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1339 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1340 62ee7d94 2023-01-10 thomas if (datalen != sizeof(ichild))
1341 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1343 62ee7d94 2023-01-10 thomas memcpy(&ichild, imsg->data, sizeof(ichild));
1345 62ee7d94 2023-01-10 thomas client->id = ichild.client_id;
1346 62ee7d94 2023-01-10 thomas if (ichild.proc_id == PROC_REPO_WRITE)
1347 62ee7d94 2023-01-10 thomas client->is_writing = 1;
1348 62ee7d94 2023-01-10 thomas else if (ichild.proc_id == PROC_REPO_READ)
1349 62ee7d94 2023-01-10 thomas client->is_writing = 0;
1351 62ee7d94 2023-01-10 thomas return got_error_msg(GOT_ERR_PRIVSEP_MSG,
1352 62ee7d94 2023-01-10 thomas "bad child process type");
1354 62ee7d94 2023-01-10 thomas if (imsg->fd == -1)
1355 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_NO_FD);
1357 62ee7d94 2023-01-10 thomas imsg_init(&client->repo_child_iev.ibuf, imsg->fd);
1358 62ee7d94 2023-01-10 thomas client->repo_child_iev.handler = session_dispatch_repo_child;
1359 62ee7d94 2023-01-10 thomas client->repo_child_iev.events = EV_READ;
1360 62ee7d94 2023-01-10 thomas client->repo_child_iev.handler_arg = NULL;
1361 62ee7d94 2023-01-10 thomas event_set(&client->repo_child_iev.ev, client->repo_child_iev.ibuf.fd,
1362 62ee7d94 2023-01-10 thomas EV_READ, session_dispatch_repo_child, &client->repo_child_iev);
1363 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(&client->repo_child_iev);
1365 62ee7d94 2023-01-10 thomas /* The "recvfd" pledge promise is no longer needed. */
1366 62ee7d94 2023-01-10 thomas if (pledge("stdio rpath wpath cpath sendfd fattr flock", NULL) == -1)
1367 62ee7d94 2023-01-10 thomas fatal("pledge");
1369 62ee7d94 2023-01-10 thomas return NULL;
1372 62ee7d94 2023-01-10 thomas static void
1373 62ee7d94 2023-01-10 thomas session_dispatch(int fd, short event, void *arg)
1375 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = arg;
1376 62ee7d94 2023-01-10 thomas struct imsgbuf *ibuf = &iev->ibuf;
1377 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
1378 62ee7d94 2023-01-10 thomas ssize_t n;
1379 62ee7d94 2023-01-10 thomas int shut = 0;
1380 62ee7d94 2023-01-10 thomas struct imsg imsg;
1382 62ee7d94 2023-01-10 thomas if (event & EV_READ) {
1383 62ee7d94 2023-01-10 thomas if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1384 62ee7d94 2023-01-10 thomas fatal("imsg_read error");
1385 62ee7d94 2023-01-10 thomas if (n == 0) {
1386 62ee7d94 2023-01-10 thomas /* Connection closed. */
1387 62ee7d94 2023-01-10 thomas shut = 1;
1388 62ee7d94 2023-01-10 thomas goto done;
1392 62ee7d94 2023-01-10 thomas if (event & EV_WRITE) {
1393 62ee7d94 2023-01-10 thomas n = msgbuf_write(&ibuf->w);
1394 62ee7d94 2023-01-10 thomas if (n == -1 && errno != EAGAIN)
1395 62ee7d94 2023-01-10 thomas fatal("msgbuf_write");
1396 62ee7d94 2023-01-10 thomas if (n == 0) {
1397 62ee7d94 2023-01-10 thomas /* Connection closed. */
1398 62ee7d94 2023-01-10 thomas shut = 1;
1399 62ee7d94 2023-01-10 thomas goto done;
1403 62ee7d94 2023-01-10 thomas for (;;) {
1404 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
1405 62ee7d94 2023-01-10 thomas uint32_t client_id = 0;
1406 62ee7d94 2023-01-10 thomas int do_disconnect = 0, do_list_refs = 0;
1408 62ee7d94 2023-01-10 thomas if ((n = imsg_get(ibuf, &imsg)) == -1)
1409 62ee7d94 2023-01-10 thomas fatal("%s: imsg_get error", __func__);
1410 62ee7d94 2023-01-10 thomas if (n == 0) /* No more messages. */
1413 62ee7d94 2023-01-10 thomas switch (imsg.hdr.type) {
1414 62ee7d94 2023-01-10 thomas case GOTD_IMSG_ERROR:
1415 62ee7d94 2023-01-10 thomas do_disconnect = 1;
1416 62ee7d94 2023-01-10 thomas err = gotd_imsg_recv_error(&client_id, &imsg);
1418 62ee7d94 2023-01-10 thomas case GOTD_IMSG_CONNECT:
1419 62ee7d94 2023-01-10 thomas err = recv_connect(&imsg);
1421 62ee7d94 2023-01-10 thomas case GOTD_IMSG_DISCONNECT:
1422 62ee7d94 2023-01-10 thomas do_disconnect = 1;
1424 62ee7d94 2023-01-10 thomas case GOTD_IMSG_CONNECT_REPO_CHILD:
1425 62ee7d94 2023-01-10 thomas err = recv_repo_child(&imsg);
1426 62ee7d94 2023-01-10 thomas if (err)
1428 62ee7d94 2023-01-10 thomas do_list_refs = 1;
1430 62ee7d94 2023-01-10 thomas default:
1431 62ee7d94 2023-01-10 thomas log_debug("unexpected imsg %d", imsg.hdr.type);
1434 62ee7d94 2023-01-10 thomas imsg_free(&imsg);
1436 62ee7d94 2023-01-10 thomas if (do_disconnect) {
1437 62ee7d94 2023-01-10 thomas if (err)
1438 62ee7d94 2023-01-10 thomas disconnect_on_error(client, err);
1440 62ee7d94 2023-01-10 thomas disconnect(client);
1441 62ee7d94 2023-01-10 thomas } else if (do_list_refs)
1442 62ee7d94 2023-01-10 thomas err = list_refs_request();
1444 62ee7d94 2023-01-10 thomas if (err)
1445 62ee7d94 2023-01-10 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1448 62ee7d94 2023-01-10 thomas if (!shut) {
1449 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(iev);
1450 62ee7d94 2023-01-10 thomas } else {
1451 62ee7d94 2023-01-10 thomas /* This pipe is dead. Remove its event handler */
1452 62ee7d94 2023-01-10 thomas event_del(&iev->ev);
1453 62ee7d94 2023-01-10 thomas event_loopexit(NULL);
1458 62ee7d94 2023-01-10 thomas session_main(const char *title, const char *repo_path,
1459 7fed8fa4 2023-06-22 thomas int *pack_fds, int *temp_fds, struct timeval *request_timeout,
1460 7fed8fa4 2023-06-22 thomas enum gotd_procid proc_id)
1462 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
1463 62ee7d94 2023-01-10 thomas struct event evsigint, evsigterm, evsighup, evsigusr1;
1465 62ee7d94 2023-01-10 thomas gotd_session.title = title;
1466 62ee7d94 2023-01-10 thomas gotd_session.pid = getpid();
1467 62ee7d94 2023-01-10 thomas gotd_session.pack_fds = pack_fds;
1468 62ee7d94 2023-01-10 thomas gotd_session.temp_fds = temp_fds;
1469 62ee7d94 2023-01-10 thomas memcpy(&gotd_session.request_timeout, request_timeout,
1470 62ee7d94 2023-01-10 thomas sizeof(gotd_session.request_timeout));
1471 7fed8fa4 2023-06-22 thomas gotd_session.proc_id = proc_id;
1473 62ee7d94 2023-01-10 thomas err = got_repo_open(&gotd_session.repo, repo_path, NULL, pack_fds);
1474 62ee7d94 2023-01-10 thomas if (err)
1475 62ee7d94 2023-01-10 thomas goto done;
1476 62ee7d94 2023-01-10 thomas if (!got_repo_is_bare(gotd_session.repo)) {
1477 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_NOT_GIT_REPO,
1478 62ee7d94 2023-01-10 thomas "bare git repository required");
1479 62ee7d94 2023-01-10 thomas goto done;
1482 62ee7d94 2023-01-10 thomas got_repo_temp_fds_set(gotd_session.repo, temp_fds);
1484 62ee7d94 2023-01-10 thomas signal_set(&evsigint, SIGINT, gotd_session_sighdlr, NULL);
1485 62ee7d94 2023-01-10 thomas signal_set(&evsigterm, SIGTERM, gotd_session_sighdlr, NULL);
1486 62ee7d94 2023-01-10 thomas signal_set(&evsighup, SIGHUP, gotd_session_sighdlr, NULL);
1487 62ee7d94 2023-01-10 thomas signal_set(&evsigusr1, SIGUSR1, gotd_session_sighdlr, NULL);
1488 62ee7d94 2023-01-10 thomas signal(SIGPIPE, SIG_IGN);
1490 62ee7d94 2023-01-10 thomas signal_add(&evsigint, NULL);
1491 62ee7d94 2023-01-10 thomas signal_add(&evsigterm, NULL);
1492 62ee7d94 2023-01-10 thomas signal_add(&evsighup, NULL);
1493 62ee7d94 2023-01-10 thomas signal_add(&evsigusr1, NULL);
1495 62ee7d94 2023-01-10 thomas gotd_session_client.state = GOTD_STATE_EXPECT_LIST_REFS;
1496 62ee7d94 2023-01-10 thomas gotd_session_client.fd = -1;
1497 62ee7d94 2023-01-10 thomas gotd_session_client.nref_updates = -1;
1498 a6f25078 2023-01-10 thomas gotd_session_client.delta_cache_fd = -1;
1499 98c7fd82 2023-01-23 thomas gotd_session_client.accept_flush_pkt = 1;
1501 62ee7d94 2023-01-10 thomas imsg_init(&gotd_session.parent_iev.ibuf, GOTD_FILENO_MSG_PIPE);
1502 62ee7d94 2023-01-10 thomas gotd_session.parent_iev.handler = session_dispatch;
1503 62ee7d94 2023-01-10 thomas gotd_session.parent_iev.events = EV_READ;
1504 62ee7d94 2023-01-10 thomas gotd_session.parent_iev.handler_arg = NULL;
1505 62ee7d94 2023-01-10 thomas event_set(&gotd_session.parent_iev.ev, gotd_session.parent_iev.ibuf.fd,
1506 62ee7d94 2023-01-10 thomas EV_READ, session_dispatch, &gotd_session.parent_iev);
1507 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&gotd_session.parent_iev,
1508 7fed8fa4 2023-06-22 thomas GOTD_IMSG_CLIENT_SESSION_READY, gotd_session.proc_id,
1509 7fed8fa4 2023-06-22 thomas -1, NULL, 0) == -1) {
1510 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose CLIENT_SESSION_READY");
1511 62ee7d94 2023-01-10 thomas goto done;
1514 62ee7d94 2023-01-10 thomas event_dispatch();
1516 62ee7d94 2023-01-10 thomas if (err)
1517 62ee7d94 2023-01-10 thomas log_warnx("%s: %s", title, err->msg);
1518 62ee7d94 2023-01-10 thomas gotd_session_shutdown();
1522 62ee7d94 2023-01-10 thomas gotd_session_shutdown(void)
1524 5330ab76 2023-02-17 thomas log_debug("shutting down");
1525 62ee7d94 2023-01-10 thomas if (gotd_session.repo)
1526 62ee7d94 2023-01-10 thomas got_repo_close(gotd_session.repo);
1527 62ee7d94 2023-01-10 thomas got_repo_pack_fds_close(gotd_session.pack_fds);
1528 62ee7d94 2023-01-10 thomas got_repo_temp_fds_close(gotd_session.temp_fds);
1529 62ee7d94 2023-01-10 thomas exit(0);
