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 62ee7d94 2023-01-10 thomas } gotd_session;
64 62ee7d94 2023-01-10 thomas static struct gotd_session_client {
65 7b1db75e 2023-01-14 thomas enum gotd_session_state state;
66 62ee7d94 2023-01-10 thomas int is_writing;
67 62ee7d94 2023-01-10 thomas struct gotd_client_capability *capabilities;
68 62ee7d94 2023-01-10 thomas size_t ncapa_alloc;
69 62ee7d94 2023-01-10 thomas size_t ncapabilities;
70 62ee7d94 2023-01-10 thomas uint32_t id;
72 62ee7d94 2023-01-10 thomas int delta_cache_fd;
73 62ee7d94 2023-01-10 thomas struct gotd_imsgev iev;
74 62ee7d94 2023-01-10 thomas struct gotd_imsgev repo_child_iev;
75 62ee7d94 2023-01-10 thomas struct event tmo;
76 62ee7d94 2023-01-10 thomas uid_t euid;
77 62ee7d94 2023-01-10 thomas gid_t egid;
78 62ee7d94 2023-01-10 thomas char *packfile_path;
79 62ee7d94 2023-01-10 thomas char *packidx_path;
80 62ee7d94 2023-01-10 thomas int nref_updates;
81 98c7fd82 2023-01-23 thomas int accept_flush_pkt;
82 62ee7d94 2023-01-10 thomas } gotd_session_client;
84 62ee7d94 2023-01-10 thomas void gotd_session_sighdlr(int sig, short event, void *arg);
85 62ee7d94 2023-01-10 thomas static void gotd_session_shutdown(void);
87 62ee7d94 2023-01-10 thomas static void
88 62ee7d94 2023-01-10 thomas disconnect(struct gotd_session_client *client)
90 62ee7d94 2023-01-10 thomas log_debug("uid %d: disconnecting", client->euid);
92 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&gotd_session.parent_iev,
93 62ee7d94 2023-01-10 thomas GOTD_IMSG_DISCONNECT, PROC_SESSION, -1, NULL, 0) == -1)
94 62ee7d94 2023-01-10 thomas log_warn("imsg compose DISCONNECT");
96 62ee7d94 2023-01-10 thomas imsg_clear(&client->repo_child_iev.ibuf);
97 62ee7d94 2023-01-10 thomas event_del(&client->repo_child_iev.ev);
98 62ee7d94 2023-01-10 thomas evtimer_del(&client->tmo);
99 62ee7d94 2023-01-10 thomas close(client->fd);
100 62ee7d94 2023-01-10 thomas if (client->delta_cache_fd != -1)
101 62ee7d94 2023-01-10 thomas close(client->delta_cache_fd);
102 62ee7d94 2023-01-10 thomas if (client->packfile_path) {
103 62ee7d94 2023-01-10 thomas if (unlink(client->packfile_path) == -1 && errno != ENOENT)
104 62ee7d94 2023-01-10 thomas log_warn("unlink %s: ", client->packfile_path);
105 62ee7d94 2023-01-10 thomas free(client->packfile_path);
107 62ee7d94 2023-01-10 thomas if (client->packidx_path) {
108 62ee7d94 2023-01-10 thomas if (unlink(client->packidx_path) == -1 && errno != ENOENT)
109 62ee7d94 2023-01-10 thomas log_warn("unlink %s: ", client->packidx_path);
110 62ee7d94 2023-01-10 thomas free(client->packidx_path);
112 62ee7d94 2023-01-10 thomas free(client->capabilities);
114 62ee7d94 2023-01-10 thomas gotd_session_shutdown();
117 62ee7d94 2023-01-10 thomas static void
118 62ee7d94 2023-01-10 thomas disconnect_on_error(struct gotd_session_client *client,
119 62ee7d94 2023-01-10 thomas const struct got_error *err)
121 62ee7d94 2023-01-10 thomas struct imsgbuf ibuf;
123 62ee7d94 2023-01-10 thomas log_warnx("uid %d: %s", client->euid, err->msg);
124 62ee7d94 2023-01-10 thomas if (err->code != GOT_ERR_EOF) {
125 62ee7d94 2023-01-10 thomas imsg_init(&ibuf, client->fd);
126 62ee7d94 2023-01-10 thomas gotd_imsg_send_error(&ibuf, 0, PROC_SESSION, err);
127 62ee7d94 2023-01-10 thomas imsg_clear(&ibuf);
130 62ee7d94 2023-01-10 thomas disconnect(client);
133 62ee7d94 2023-01-10 thomas static void
134 62ee7d94 2023-01-10 thomas gotd_request_timeout(int fd, short events, void *arg)
136 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = arg;
138 62ee7d94 2023-01-10 thomas log_debug("disconnecting uid %d due to timeout", client->euid);
139 62ee7d94 2023-01-10 thomas disconnect(client);
143 62ee7d94 2023-01-10 thomas gotd_session_sighdlr(int sig, short event, void *arg)
146 62ee7d94 2023-01-10 thomas * Normal signal handler rules don't apply because libevent
147 62ee7d94 2023-01-10 thomas * decouples for us.
150 62ee7d94 2023-01-10 thomas switch (sig) {
151 62ee7d94 2023-01-10 thomas case SIGHUP:
152 62ee7d94 2023-01-10 thomas log_info("%s: ignoring SIGHUP", __func__);
154 62ee7d94 2023-01-10 thomas case SIGUSR1:
155 62ee7d94 2023-01-10 thomas log_info("%s: ignoring SIGUSR1", __func__);
157 62ee7d94 2023-01-10 thomas case SIGTERM:
158 62ee7d94 2023-01-10 thomas case SIGINT:
159 62ee7d94 2023-01-10 thomas gotd_session_shutdown();
160 62ee7d94 2023-01-10 thomas /* NOTREACHED */
163 62ee7d94 2023-01-10 thomas fatalx("unexpected signal");
167 62ee7d94 2023-01-10 thomas static const struct got_error *
168 62ee7d94 2023-01-10 thomas recv_packfile_done(uint32_t *client_id, struct imsg *imsg)
170 62ee7d94 2023-01-10 thomas struct gotd_imsg_packfile_done idone;
171 62ee7d94 2023-01-10 thomas size_t datalen;
173 62ee7d94 2023-01-10 thomas log_debug("packfile-done received");
175 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
176 62ee7d94 2023-01-10 thomas if (datalen != sizeof(idone))
177 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
178 62ee7d94 2023-01-10 thomas memcpy(&idone, imsg->data, sizeof(idone));
180 62ee7d94 2023-01-10 thomas *client_id = idone.client_id;
181 62ee7d94 2023-01-10 thomas return NULL;
184 62ee7d94 2023-01-10 thomas static const struct got_error *
185 62ee7d94 2023-01-10 thomas recv_packfile_install(uint32_t *client_id, struct imsg *imsg)
187 62ee7d94 2023-01-10 thomas struct gotd_imsg_packfile_install inst;
188 62ee7d94 2023-01-10 thomas size_t datalen;
190 62ee7d94 2023-01-10 thomas log_debug("packfile-install received");
192 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
193 62ee7d94 2023-01-10 thomas if (datalen != sizeof(inst))
194 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
195 62ee7d94 2023-01-10 thomas memcpy(&inst, imsg->data, sizeof(inst));
197 62ee7d94 2023-01-10 thomas *client_id = inst.client_id;
198 62ee7d94 2023-01-10 thomas return NULL;
201 62ee7d94 2023-01-10 thomas static const struct got_error *
202 62ee7d94 2023-01-10 thomas recv_ref_updates_start(uint32_t *client_id, struct imsg *imsg)
204 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_updates_start istart;
205 62ee7d94 2023-01-10 thomas size_t datalen;
207 62ee7d94 2023-01-10 thomas log_debug("ref-updates-start received");
209 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
210 62ee7d94 2023-01-10 thomas if (datalen != sizeof(istart))
211 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
212 62ee7d94 2023-01-10 thomas memcpy(&istart, imsg->data, sizeof(istart));
214 62ee7d94 2023-01-10 thomas *client_id = istart.client_id;
215 62ee7d94 2023-01-10 thomas return NULL;
218 62ee7d94 2023-01-10 thomas static const struct got_error *
219 62ee7d94 2023-01-10 thomas recv_ref_update(uint32_t *client_id, struct imsg *imsg)
221 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update iref;
222 62ee7d94 2023-01-10 thomas size_t datalen;
224 62ee7d94 2023-01-10 thomas log_debug("ref-update received");
226 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
227 62ee7d94 2023-01-10 thomas if (datalen < sizeof(iref))
228 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
229 62ee7d94 2023-01-10 thomas memcpy(&iref, imsg->data, sizeof(iref));
231 62ee7d94 2023-01-10 thomas *client_id = iref.client_id;
232 62ee7d94 2023-01-10 thomas return NULL;
235 62ee7d94 2023-01-10 thomas static const struct got_error *
236 62ee7d94 2023-01-10 thomas send_ref_update_ok(struct gotd_session_client *client,
237 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update *iref, const char *refname)
239 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update_ok iok;
240 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = &client->iev;
241 62ee7d94 2023-01-10 thomas struct ibuf *wbuf;
242 62ee7d94 2023-01-10 thomas size_t len;
244 62ee7d94 2023-01-10 thomas memset(&iok, 0, sizeof(iok));
245 62ee7d94 2023-01-10 thomas iok.client_id = client->id;
246 62ee7d94 2023-01-10 thomas memcpy(iok.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
247 62ee7d94 2023-01-10 thomas memcpy(iok.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
248 62ee7d94 2023-01-10 thomas iok.name_len = strlen(refname);
250 62ee7d94 2023-01-10 thomas len = sizeof(iok) + iok.name_len;
251 62ee7d94 2023-01-10 thomas wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_REF_UPDATE_OK,
252 62ee7d94 2023-01-10 thomas PROC_SESSION, gotd_session.pid, len);
253 62ee7d94 2023-01-10 thomas if (wbuf == NULL)
254 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_create REF_UPDATE_OK");
256 62ee7d94 2023-01-10 thomas if (imsg_add(wbuf, &iok, sizeof(iok)) == -1)
257 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_add REF_UPDATE_OK");
258 62ee7d94 2023-01-10 thomas if (imsg_add(wbuf, refname, iok.name_len) == -1)
259 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_add REF_UPDATE_OK");
261 62ee7d94 2023-01-10 thomas wbuf->fd = -1;
262 62ee7d94 2023-01-10 thomas imsg_close(&iev->ibuf, wbuf);
263 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(iev);
264 62ee7d94 2023-01-10 thomas return NULL;
267 62ee7d94 2023-01-10 thomas static void
268 62ee7d94 2023-01-10 thomas send_refs_updated(struct gotd_session_client *client)
270 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->iev, GOTD_IMSG_REFS_UPDATED,
271 62ee7d94 2023-01-10 thomas PROC_SESSION, -1, NULL, 0) == -1)
272 62ee7d94 2023-01-10 thomas log_warn("imsg compose REFS_UPDATED");
275 62ee7d94 2023-01-10 thomas static const struct got_error *
276 62ee7d94 2023-01-10 thomas send_ref_update_ng(struct gotd_session_client *client,
277 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update *iref, const char *refname,
278 62ee7d94 2023-01-10 thomas const char *reason)
280 62ee7d94 2023-01-10 thomas const struct got_error *ng_err;
281 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update_ng ing;
282 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = &client->iev;
283 62ee7d94 2023-01-10 thomas struct ibuf *wbuf;
284 62ee7d94 2023-01-10 thomas size_t len;
286 62ee7d94 2023-01-10 thomas memset(&ing, 0, sizeof(ing));
287 62ee7d94 2023-01-10 thomas ing.client_id = client->id;
288 62ee7d94 2023-01-10 thomas memcpy(ing.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
289 62ee7d94 2023-01-10 thomas memcpy(ing.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
290 62ee7d94 2023-01-10 thomas ing.name_len = strlen(refname);
292 62ee7d94 2023-01-10 thomas ng_err = got_error_fmt(GOT_ERR_REF_BUSY, "%s", reason);
293 62ee7d94 2023-01-10 thomas ing.reason_len = strlen(ng_err->msg);
295 62ee7d94 2023-01-10 thomas len = sizeof(ing) + ing.name_len + ing.reason_len;
296 62ee7d94 2023-01-10 thomas wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_REF_UPDATE_NG,
297 62ee7d94 2023-01-10 thomas PROC_SESSION, gotd_session.pid, len);
298 62ee7d94 2023-01-10 thomas if (wbuf == NULL)
299 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_create REF_UPDATE_NG");
301 62ee7d94 2023-01-10 thomas if (imsg_add(wbuf, &ing, sizeof(ing)) == -1)
302 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
303 62ee7d94 2023-01-10 thomas if (imsg_add(wbuf, refname, ing.name_len) == -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, ng_err->msg, ing.reason_len) == -1)
306 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
308 62ee7d94 2023-01-10 thomas wbuf->fd = -1;
309 62ee7d94 2023-01-10 thomas imsg_close(&iev->ibuf, wbuf);
310 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(iev);
311 62ee7d94 2023-01-10 thomas return NULL;
314 62ee7d94 2023-01-10 thomas static const struct got_error *
315 62ee7d94 2023-01-10 thomas install_pack(struct gotd_session_client *client, const char *repo_path,
316 62ee7d94 2023-01-10 thomas struct imsg *imsg)
318 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
319 62ee7d94 2023-01-10 thomas struct gotd_imsg_packfile_install inst;
320 62ee7d94 2023-01-10 thomas char hex[SHA1_DIGEST_STRING_LENGTH];
321 62ee7d94 2023-01-10 thomas size_t datalen;
322 62ee7d94 2023-01-10 thomas char *packfile_path = NULL, *packidx_path = NULL;
324 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
325 62ee7d94 2023-01-10 thomas if (datalen != sizeof(inst))
326 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
327 62ee7d94 2023-01-10 thomas memcpy(&inst, imsg->data, sizeof(inst));
329 62ee7d94 2023-01-10 thomas if (client->packfile_path == NULL)
330 62ee7d94 2023-01-10 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
331 62ee7d94 2023-01-10 thomas "client has no pack file");
332 62ee7d94 2023-01-10 thomas if (client->packidx_path == NULL)
333 62ee7d94 2023-01-10 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
334 62ee7d94 2023-01-10 thomas "client has no pack file index");
336 62ee7d94 2023-01-10 thomas if (got_sha1_digest_to_str(inst.pack_sha1, hex, sizeof(hex)) == NULL)
337 62ee7d94 2023-01-10 thomas return got_error_msg(GOT_ERR_NO_SPACE,
338 62ee7d94 2023-01-10 thomas "could not convert pack file SHA1 to hex");
340 62ee7d94 2023-01-10 thomas if (asprintf(&packfile_path, "/%s/%s/pack-%s.pack",
341 62ee7d94 2023-01-10 thomas repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
342 62ee7d94 2023-01-10 thomas err = got_error_from_errno("asprintf");
343 62ee7d94 2023-01-10 thomas goto done;
346 62ee7d94 2023-01-10 thomas if (asprintf(&packidx_path, "/%s/%s/pack-%s.idx",
347 62ee7d94 2023-01-10 thomas repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
348 62ee7d94 2023-01-10 thomas err = got_error_from_errno("asprintf");
349 62ee7d94 2023-01-10 thomas goto done;
352 62ee7d94 2023-01-10 thomas if (rename(client->packfile_path, packfile_path) == -1) {
353 62ee7d94 2023-01-10 thomas err = got_error_from_errno3("rename", client->packfile_path,
354 62ee7d94 2023-01-10 thomas packfile_path);
355 62ee7d94 2023-01-10 thomas goto done;
358 62ee7d94 2023-01-10 thomas free(client->packfile_path);
359 62ee7d94 2023-01-10 thomas client->packfile_path = NULL;
361 62ee7d94 2023-01-10 thomas if (rename(client->packidx_path, packidx_path) == -1) {
362 62ee7d94 2023-01-10 thomas err = got_error_from_errno3("rename", client->packidx_path,
363 62ee7d94 2023-01-10 thomas packidx_path);
364 62ee7d94 2023-01-10 thomas goto done;
367 62ee7d94 2023-01-10 thomas free(client->packidx_path);
368 62ee7d94 2023-01-10 thomas client->packidx_path = NULL;
370 62ee7d94 2023-01-10 thomas free(packfile_path);
371 62ee7d94 2023-01-10 thomas free(packidx_path);
372 62ee7d94 2023-01-10 thomas return err;
375 62ee7d94 2023-01-10 thomas static const struct got_error *
376 62ee7d94 2023-01-10 thomas begin_ref_updates(struct gotd_session_client *client, struct imsg *imsg)
378 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_updates_start istart;
379 62ee7d94 2023-01-10 thomas size_t datalen;
381 62ee7d94 2023-01-10 thomas if (client->nref_updates != -1)
382 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
384 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
385 62ee7d94 2023-01-10 thomas if (datalen != sizeof(istart))
386 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
387 62ee7d94 2023-01-10 thomas memcpy(&istart, imsg->data, sizeof(istart));
389 62ee7d94 2023-01-10 thomas if (istart.nref_updates <= 0)
390 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
392 62ee7d94 2023-01-10 thomas client->nref_updates = istart.nref_updates;
393 62ee7d94 2023-01-10 thomas return NULL;
396 62ee7d94 2023-01-10 thomas static const struct got_error *
397 d98779cd 2023-01-19 thomas update_ref(int *shut, struct gotd_session_client *client,
398 d98779cd 2023-01-19 thomas const char *repo_path, struct imsg *imsg)
400 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
401 62ee7d94 2023-01-10 thomas struct got_repository *repo = NULL;
402 62ee7d94 2023-01-10 thomas struct got_reference *ref = NULL;
403 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update iref;
404 62ee7d94 2023-01-10 thomas struct got_object_id old_id, new_id;
405 62ee7d94 2023-01-10 thomas struct got_object_id *id = NULL;
406 62ee7d94 2023-01-10 thomas struct got_object *obj = NULL;
407 62ee7d94 2023-01-10 thomas char *refname = NULL;
408 62ee7d94 2023-01-10 thomas size_t datalen;
409 62ee7d94 2023-01-10 thomas int locked = 0;
411 62ee7d94 2023-01-10 thomas log_debug("update-ref from uid %d", client->euid);
413 62ee7d94 2023-01-10 thomas if (client->nref_updates <= 0)
414 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
416 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
417 62ee7d94 2023-01-10 thomas if (datalen < sizeof(iref))
418 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
419 62ee7d94 2023-01-10 thomas memcpy(&iref, imsg->data, sizeof(iref));
420 62ee7d94 2023-01-10 thomas if (datalen != sizeof(iref) + iref.name_len)
421 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
422 fcbb06bf 2023-01-14 thomas refname = strndup(imsg->data + sizeof(iref), iref.name_len);
423 62ee7d94 2023-01-10 thomas if (refname == NULL)
424 fcbb06bf 2023-01-14 thomas return got_error_from_errno("strndup");
426 62ee7d94 2023-01-10 thomas log_debug("updating ref %s for uid %d", refname, client->euid);
428 62ee7d94 2023-01-10 thomas err = got_repo_open(&repo, repo_path, NULL, NULL);
430 62ee7d94 2023-01-10 thomas goto done;
432 62ee7d94 2023-01-10 thomas memcpy(old_id.sha1, iref.old_id, SHA1_DIGEST_LENGTH);
433 62ee7d94 2023-01-10 thomas memcpy(new_id.sha1, iref.new_id, SHA1_DIGEST_LENGTH);
434 49563dfb 2023-01-28 thomas err = got_object_open(&obj, repo,
435 49563dfb 2023-01-28 thomas iref.delete_ref ? &old_id : &new_id);
437 62ee7d94 2023-01-10 thomas goto done;
439 62ee7d94 2023-01-10 thomas if (iref.ref_is_new) {
440 62ee7d94 2023-01-10 thomas err = got_ref_open(&ref, repo, refname, 0);
441 62ee7d94 2023-01-10 thomas if (err) {
442 62ee7d94 2023-01-10 thomas if (err->code != GOT_ERR_NOT_REF)
443 62ee7d94 2023-01-10 thomas goto done;
444 62ee7d94 2023-01-10 thomas err = got_ref_alloc(&ref, refname, &new_id);
446 62ee7d94 2023-01-10 thomas goto done;
447 62ee7d94 2023-01-10 thomas err = got_ref_write(ref, repo); /* will lock/unlock */
449 62ee7d94 2023-01-10 thomas goto done;
451 62ee7d94 2023-01-10 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
452 62ee7d94 2023-01-10 thomas "%s has been created by someone else "
453 62ee7d94 2023-01-10 thomas "while transaction was in progress",
454 62ee7d94 2023-01-10 thomas got_ref_get_name(ref));
455 62ee7d94 2023-01-10 thomas goto done;
457 49563dfb 2023-01-28 thomas } else if (iref.delete_ref) {
458 49563dfb 2023-01-28 thomas err = got_ref_open(&ref, repo, refname, 1 /* lock */);
460 49563dfb 2023-01-28 thomas goto done;
461 49563dfb 2023-01-28 thomas locked = 1;
463 49563dfb 2023-01-28 thomas err = got_ref_resolve(&id, repo, ref);
465 49563dfb 2023-01-28 thomas goto done;
467 49563dfb 2023-01-28 thomas if (got_object_id_cmp(id, &old_id) != 0) {
468 49563dfb 2023-01-28 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
469 49563dfb 2023-01-28 thomas "%s has been modified by someone else "
470 49563dfb 2023-01-28 thomas "while transaction was in progress",
471 49563dfb 2023-01-28 thomas got_ref_get_name(ref));
472 49563dfb 2023-01-28 thomas goto done;
475 49563dfb 2023-01-28 thomas err = got_ref_delete(ref, repo);
477 49563dfb 2023-01-28 thomas goto done;
479 49563dfb 2023-01-28 thomas free(id);
480 49563dfb 2023-01-28 thomas id = NULL;
482 62ee7d94 2023-01-10 thomas err = got_ref_open(&ref, repo, refname, 1 /* lock */);
484 62ee7d94 2023-01-10 thomas goto done;
485 62ee7d94 2023-01-10 thomas locked = 1;
487 62ee7d94 2023-01-10 thomas err = got_ref_resolve(&id, repo, ref);
489 62ee7d94 2023-01-10 thomas goto done;
491 62ee7d94 2023-01-10 thomas if (got_object_id_cmp(id, &old_id) != 0) {
492 62ee7d94 2023-01-10 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
493 62ee7d94 2023-01-10 thomas "%s has been modified by someone else "
494 62ee7d94 2023-01-10 thomas "while transaction was in progress",
495 62ee7d94 2023-01-10 thomas got_ref_get_name(ref));
496 62ee7d94 2023-01-10 thomas goto done;
499 62ee7d94 2023-01-10 thomas err = got_ref_change_ref(ref, &new_id);
501 62ee7d94 2023-01-10 thomas goto done;
503 62ee7d94 2023-01-10 thomas err = got_ref_write(ref, repo);
505 62ee7d94 2023-01-10 thomas goto done;
507 62ee7d94 2023-01-10 thomas free(id);
508 62ee7d94 2023-01-10 thomas id = NULL;
511 62ee7d94 2023-01-10 thomas if (err) {
512 62ee7d94 2023-01-10 thomas if (err->code == GOT_ERR_LOCKFILE_TIMEOUT) {
513 62ee7d94 2023-01-10 thomas err = got_error_fmt(GOT_ERR_LOCKFILE_TIMEOUT,
514 62ee7d94 2023-01-10 thomas "could not acquire exclusive file lock for %s",
515 62ee7d94 2023-01-10 thomas refname);
517 62ee7d94 2023-01-10 thomas send_ref_update_ng(client, &iref, refname, err->msg);
519 62ee7d94 2023-01-10 thomas send_ref_update_ok(client, &iref, refname);
521 62ee7d94 2023-01-10 thomas if (client->nref_updates > 0) {
522 62ee7d94 2023-01-10 thomas client->nref_updates--;
523 d98779cd 2023-01-19 thomas if (client->nref_updates == 0) {
524 62ee7d94 2023-01-10 thomas send_refs_updated(client);
525 d98779cd 2023-01-19 thomas *shut = 1;
529 62ee7d94 2023-01-10 thomas if (locked) {
530 62ee7d94 2023-01-10 thomas const struct got_error *unlock_err;
531 62ee7d94 2023-01-10 thomas unlock_err = got_ref_unlock(ref);
532 62ee7d94 2023-01-10 thomas if (unlock_err && err == NULL)
533 62ee7d94 2023-01-10 thomas err = unlock_err;
536 62ee7d94 2023-01-10 thomas got_ref_close(ref);
538 62ee7d94 2023-01-10 thomas got_object_close(obj);
539 62ee7d94 2023-01-10 thomas if (repo)
540 62ee7d94 2023-01-10 thomas got_repo_close(repo);
541 62ee7d94 2023-01-10 thomas free(refname);
542 62ee7d94 2023-01-10 thomas free(id);
543 62ee7d94 2023-01-10 thomas return err;
546 62ee7d94 2023-01-10 thomas static void
547 62ee7d94 2023-01-10 thomas session_dispatch_repo_child(int fd, short event, void *arg)
549 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = arg;
550 62ee7d94 2023-01-10 thomas struct imsgbuf *ibuf = &iev->ibuf;
551 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
552 62ee7d94 2023-01-10 thomas ssize_t n;
553 62ee7d94 2023-01-10 thomas int shut = 0;
554 62ee7d94 2023-01-10 thomas struct imsg imsg;
556 62ee7d94 2023-01-10 thomas if (event & EV_READ) {
557 62ee7d94 2023-01-10 thomas if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
558 62ee7d94 2023-01-10 thomas fatal("imsg_read error");
559 62ee7d94 2023-01-10 thomas if (n == 0) {
560 62ee7d94 2023-01-10 thomas /* Connection closed. */
561 62ee7d94 2023-01-10 thomas shut = 1;
562 62ee7d94 2023-01-10 thomas goto done;
566 62ee7d94 2023-01-10 thomas if (event & EV_WRITE) {
567 62ee7d94 2023-01-10 thomas n = msgbuf_write(&ibuf->w);
568 62ee7d94 2023-01-10 thomas if (n == -1 && errno != EAGAIN)
569 62ee7d94 2023-01-10 thomas fatal("msgbuf_write");
570 62ee7d94 2023-01-10 thomas if (n == 0) {
571 62ee7d94 2023-01-10 thomas /* Connection closed. */
572 62ee7d94 2023-01-10 thomas shut = 1;
573 62ee7d94 2023-01-10 thomas goto done;
577 62ee7d94 2023-01-10 thomas for (;;) {
578 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
579 62ee7d94 2023-01-10 thomas uint32_t client_id = 0;
580 62ee7d94 2023-01-10 thomas int do_disconnect = 0;
581 62ee7d94 2023-01-10 thomas int do_ref_updates = 0, do_ref_update = 0;
582 62ee7d94 2023-01-10 thomas int do_packfile_install = 0;
584 62ee7d94 2023-01-10 thomas if ((n = imsg_get(ibuf, &imsg)) == -1)
585 62ee7d94 2023-01-10 thomas fatal("%s: imsg_get error", __func__);
586 62ee7d94 2023-01-10 thomas if (n == 0) /* No more messages. */
589 62ee7d94 2023-01-10 thomas switch (imsg.hdr.type) {
590 62ee7d94 2023-01-10 thomas case GOTD_IMSG_ERROR:
591 62ee7d94 2023-01-10 thomas do_disconnect = 1;
592 62ee7d94 2023-01-10 thomas err = gotd_imsg_recv_error(&client_id, &imsg);
594 62ee7d94 2023-01-10 thomas case GOTD_IMSG_PACKFILE_DONE:
595 62ee7d94 2023-01-10 thomas do_disconnect = 1;
596 62ee7d94 2023-01-10 thomas err = recv_packfile_done(&client_id, &imsg);
598 62ee7d94 2023-01-10 thomas case GOTD_IMSG_PACKFILE_INSTALL:
599 62ee7d94 2023-01-10 thomas err = recv_packfile_install(&client_id, &imsg);
600 62ee7d94 2023-01-10 thomas if (err == NULL)
601 62ee7d94 2023-01-10 thomas do_packfile_install = 1;
603 62ee7d94 2023-01-10 thomas case GOTD_IMSG_REF_UPDATES_START:
604 62ee7d94 2023-01-10 thomas err = recv_ref_updates_start(&client_id, &imsg);
605 62ee7d94 2023-01-10 thomas if (err == NULL)
606 62ee7d94 2023-01-10 thomas do_ref_updates = 1;
608 62ee7d94 2023-01-10 thomas case GOTD_IMSG_REF_UPDATE:
609 62ee7d94 2023-01-10 thomas err = recv_ref_update(&client_id, &imsg);
610 62ee7d94 2023-01-10 thomas if (err == NULL)
611 62ee7d94 2023-01-10 thomas do_ref_update = 1;
614 62ee7d94 2023-01-10 thomas log_debug("unexpected imsg %d", imsg.hdr.type);
618 62ee7d94 2023-01-10 thomas if (do_disconnect) {
620 62ee7d94 2023-01-10 thomas disconnect_on_error(client, err);
622 62ee7d94 2023-01-10 thomas disconnect(client);
624 62ee7d94 2023-01-10 thomas if (do_packfile_install)
625 62ee7d94 2023-01-10 thomas err = install_pack(client,
626 62ee7d94 2023-01-10 thomas gotd_session.repo->path, &imsg);
627 62ee7d94 2023-01-10 thomas else if (do_ref_updates)
628 62ee7d94 2023-01-10 thomas err = begin_ref_updates(client, &imsg);
629 62ee7d94 2023-01-10 thomas else if (do_ref_update)
630 d98779cd 2023-01-19 thomas err = update_ref(&shut, client,
631 62ee7d94 2023-01-10 thomas gotd_session.repo->path, &imsg);
633 62ee7d94 2023-01-10 thomas log_warnx("uid %d: %s", client->euid, err->msg);
635 62ee7d94 2023-01-10 thomas imsg_free(&imsg);
638 62ee7d94 2023-01-10 thomas if (!shut) {
639 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(iev);
641 62ee7d94 2023-01-10 thomas /* This pipe is dead. Remove its event handler */
642 62ee7d94 2023-01-10 thomas event_del(&iev->ev);
643 62ee7d94 2023-01-10 thomas event_loopexit(NULL);
647 62ee7d94 2023-01-10 thomas static const struct got_error *
648 62ee7d94 2023-01-10 thomas recv_capabilities(struct gotd_session_client *client, struct imsg *imsg)
650 62ee7d94 2023-01-10 thomas struct gotd_imsg_capabilities icapas;
651 62ee7d94 2023-01-10 thomas size_t datalen;
653 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
654 62ee7d94 2023-01-10 thomas if (datalen != sizeof(icapas))
655 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
656 62ee7d94 2023-01-10 thomas memcpy(&icapas, imsg->data, sizeof(icapas));
658 62ee7d94 2023-01-10 thomas client->ncapa_alloc = icapas.ncapabilities;
659 62ee7d94 2023-01-10 thomas client->capabilities = calloc(client->ncapa_alloc,
660 62ee7d94 2023-01-10 thomas sizeof(*client->capabilities));
661 62ee7d94 2023-01-10 thomas if (client->capabilities == NULL) {
662 62ee7d94 2023-01-10 thomas client->ncapa_alloc = 0;
663 62ee7d94 2023-01-10 thomas return got_error_from_errno("calloc");
666 62ee7d94 2023-01-10 thomas log_debug("expecting %zu capabilities from uid %d",
667 62ee7d94 2023-01-10 thomas client->ncapa_alloc, client->euid);
668 62ee7d94 2023-01-10 thomas return NULL;
671 62ee7d94 2023-01-10 thomas static const struct got_error *
672 62ee7d94 2023-01-10 thomas recv_capability(struct gotd_session_client *client, struct imsg *imsg)
674 62ee7d94 2023-01-10 thomas struct gotd_imsg_capability icapa;
675 62ee7d94 2023-01-10 thomas struct gotd_client_capability *capa;
676 62ee7d94 2023-01-10 thomas size_t datalen;
677 62ee7d94 2023-01-10 thomas char *key, *value = NULL;
679 62ee7d94 2023-01-10 thomas if (client->capabilities == NULL ||
680 62ee7d94 2023-01-10 thomas client->ncapabilities >= client->ncapa_alloc) {
681 62ee7d94 2023-01-10 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
682 62ee7d94 2023-01-10 thomas "unexpected capability received");
685 62ee7d94 2023-01-10 thomas memset(&icapa, 0, sizeof(icapa));
687 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
688 62ee7d94 2023-01-10 thomas if (datalen < sizeof(icapa))
689 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
690 62ee7d94 2023-01-10 thomas memcpy(&icapa, imsg->data, sizeof(icapa));
692 62ee7d94 2023-01-10 thomas if (datalen != sizeof(icapa) + icapa.key_len + icapa.value_len)
693 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
695 fcbb06bf 2023-01-14 thomas key = strndup(imsg->data + sizeof(icapa), icapa.key_len);
696 62ee7d94 2023-01-10 thomas if (key == NULL)
697 fcbb06bf 2023-01-14 thomas return got_error_from_errno("strndup");
698 62ee7d94 2023-01-10 thomas if (icapa.value_len > 0) {
699 fcbb06bf 2023-01-14 thomas value = strndup(imsg->data + sizeof(icapa) + icapa.key_len,
700 fcbb06bf 2023-01-14 thomas icapa.value_len);
701 62ee7d94 2023-01-10 thomas if (value == NULL) {
702 62ee7d94 2023-01-10 thomas free(key);
703 fcbb06bf 2023-01-14 thomas return got_error_from_errno("strndup");
707 62ee7d94 2023-01-10 thomas capa = &client->capabilities[client->ncapabilities++];
708 62ee7d94 2023-01-10 thomas capa->key = key;
709 62ee7d94 2023-01-10 thomas capa->value = value;
711 62ee7d94 2023-01-10 thomas if (value)
712 62ee7d94 2023-01-10 thomas log_debug("uid %d: capability %s=%s", client->euid, key, value);
714 62ee7d94 2023-01-10 thomas log_debug("uid %d: capability %s", client->euid, key);
716 62ee7d94 2023-01-10 thomas return NULL;
719 62ee7d94 2023-01-10 thomas static const struct got_error *
720 62ee7d94 2023-01-10 thomas ensure_client_is_reading(struct gotd_session_client *client)
722 62ee7d94 2023-01-10 thomas if (client->is_writing) {
723 62ee7d94 2023-01-10 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
724 62ee7d94 2023-01-10 thomas "uid %d made a read-request but is not reading from "
725 62ee7d94 2023-01-10 thomas "a repository", client->euid);
728 62ee7d94 2023-01-10 thomas return NULL;
731 62ee7d94 2023-01-10 thomas static const struct got_error *
732 62ee7d94 2023-01-10 thomas ensure_client_is_writing(struct gotd_session_client *client)
734 62ee7d94 2023-01-10 thomas if (!client->is_writing) {
735 62ee7d94 2023-01-10 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
736 62ee7d94 2023-01-10 thomas "uid %d made a write-request but is not writing to "
737 62ee7d94 2023-01-10 thomas "a repository", client->euid);
740 62ee7d94 2023-01-10 thomas return NULL;
743 62ee7d94 2023-01-10 thomas static const struct got_error *
744 62ee7d94 2023-01-10 thomas forward_want(struct gotd_session_client *client, struct imsg *imsg)
746 62ee7d94 2023-01-10 thomas struct gotd_imsg_want ireq;
747 62ee7d94 2023-01-10 thomas struct gotd_imsg_want iwant;
748 62ee7d94 2023-01-10 thomas size_t datalen;
750 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
751 62ee7d94 2023-01-10 thomas if (datalen != sizeof(ireq))
752 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
754 62ee7d94 2023-01-10 thomas memcpy(&ireq, imsg->data, datalen);
756 62ee7d94 2023-01-10 thomas memset(&iwant, 0, sizeof(iwant));
757 62ee7d94 2023-01-10 thomas memcpy(iwant.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
758 62ee7d94 2023-01-10 thomas iwant.client_id = client->id;
760 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev, GOTD_IMSG_WANT,
761 62ee7d94 2023-01-10 thomas PROC_SESSION, -1, &iwant, sizeof(iwant)) == -1)
762 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg compose WANT");
764 62ee7d94 2023-01-10 thomas return NULL;
767 62ee7d94 2023-01-10 thomas static const struct got_error *
768 62ee7d94 2023-01-10 thomas forward_ref_update(struct gotd_session_client *client, struct imsg *imsg)
770 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
771 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update ireq;
772 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update *iref = NULL;
773 62ee7d94 2023-01-10 thomas size_t datalen;
775 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
776 62ee7d94 2023-01-10 thomas if (datalen < sizeof(ireq))
777 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
778 62ee7d94 2023-01-10 thomas memcpy(&ireq, imsg->data, sizeof(ireq));
779 62ee7d94 2023-01-10 thomas if (datalen != sizeof(ireq) + ireq.name_len)
780 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
782 62ee7d94 2023-01-10 thomas iref = malloc(datalen);
783 62ee7d94 2023-01-10 thomas if (iref == NULL)
784 62ee7d94 2023-01-10 thomas return got_error_from_errno("malloc");
785 62ee7d94 2023-01-10 thomas memcpy(iref, imsg->data, datalen);
787 62ee7d94 2023-01-10 thomas iref->client_id = client->id;
788 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
789 62ee7d94 2023-01-10 thomas GOTD_IMSG_REF_UPDATE, PROC_SESSION, -1, iref, datalen) == -1)
790 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose REF_UPDATE");
791 62ee7d94 2023-01-10 thomas free(iref);
792 62ee7d94 2023-01-10 thomas return err;
795 62ee7d94 2023-01-10 thomas static const struct got_error *
796 62ee7d94 2023-01-10 thomas forward_have(struct gotd_session_client *client, struct imsg *imsg)
798 62ee7d94 2023-01-10 thomas struct gotd_imsg_have ireq;
799 62ee7d94 2023-01-10 thomas struct gotd_imsg_have ihave;
800 62ee7d94 2023-01-10 thomas size_t datalen;
802 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
803 62ee7d94 2023-01-10 thomas if (datalen != sizeof(ireq))
804 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
806 62ee7d94 2023-01-10 thomas memcpy(&ireq, imsg->data, datalen);
808 62ee7d94 2023-01-10 thomas memset(&ihave, 0, sizeof(ihave));
809 62ee7d94 2023-01-10 thomas memcpy(ihave.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
810 62ee7d94 2023-01-10 thomas ihave.client_id = client->id;
812 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev, GOTD_IMSG_HAVE,
813 62ee7d94 2023-01-10 thomas PROC_SESSION, -1, &ihave, sizeof(ihave)) == -1)
814 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg compose HAVE");
816 62ee7d94 2023-01-10 thomas return NULL;
819 62ee7d94 2023-01-10 thomas static int
820 62ee7d94 2023-01-10 thomas client_has_capability(struct gotd_session_client *client, const char *capastr)
822 62ee7d94 2023-01-10 thomas struct gotd_client_capability *capa;
823 62ee7d94 2023-01-10 thomas size_t i;
825 62ee7d94 2023-01-10 thomas if (client->ncapabilities == 0)
826 62ee7d94 2023-01-10 thomas return 0;
828 62ee7d94 2023-01-10 thomas for (i = 0; i < client->ncapabilities; i++) {
829 62ee7d94 2023-01-10 thomas capa = &client->capabilities[i];
830 62ee7d94 2023-01-10 thomas if (strcmp(capa->key, capastr) == 0)
831 62ee7d94 2023-01-10 thomas return 1;
834 62ee7d94 2023-01-10 thomas return 0;
837 62ee7d94 2023-01-10 thomas static const struct got_error *
838 62ee7d94 2023-01-10 thomas recv_packfile(struct gotd_session_client *client)
840 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
841 62ee7d94 2023-01-10 thomas struct gotd_imsg_recv_packfile ipack;
842 62ee7d94 2023-01-10 thomas struct gotd_imsg_packfile_pipe ipipe;
843 62ee7d94 2023-01-10 thomas struct gotd_imsg_packidx_file ifile;
844 62ee7d94 2023-01-10 thomas char *basepath = NULL, *pack_path = NULL, *idx_path = NULL;
845 62ee7d94 2023-01-10 thomas int packfd = -1, idxfd = -1;
846 62ee7d94 2023-01-10 thomas int pipe[2] = { -1, -1 };
848 62ee7d94 2023-01-10 thomas if (client->packfile_path) {
849 62ee7d94 2023-01-10 thomas return got_error_fmt(GOT_ERR_PRIVSEP_MSG,
850 62ee7d94 2023-01-10 thomas "uid %d already has a pack file", client->euid);
853 62ee7d94 2023-01-10 thomas if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
854 62ee7d94 2023-01-10 thomas return got_error_from_errno("socketpair");
856 62ee7d94 2023-01-10 thomas memset(&ipipe, 0, sizeof(ipipe));
857 62ee7d94 2023-01-10 thomas ipipe.client_id = client->id;
859 62ee7d94 2023-01-10 thomas /* Send pack pipe end 0 to repo child process. */
860 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
861 62ee7d94 2023-01-10 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_SESSION, pipe[0],
862 62ee7d94 2023-01-10 thomas &ipipe, sizeof(ipipe)) == -1) {
863 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
864 62ee7d94 2023-01-10 thomas pipe[0] = -1;
865 62ee7d94 2023-01-10 thomas goto done;
867 62ee7d94 2023-01-10 thomas pipe[0] = -1;
869 62ee7d94 2023-01-10 thomas /* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
870 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->iev,
871 62ee7d94 2023-01-10 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_SESSION, pipe[1], NULL, 0) == -1)
872 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
873 62ee7d94 2023-01-10 thomas pipe[1] = -1;
875 62ee7d94 2023-01-10 thomas if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.pack",
876 62ee7d94 2023-01-10 thomas got_repo_get_path(gotd_session.repo), GOT_OBJECTS_PACK_DIR,
877 62ee7d94 2023-01-10 thomas client->euid) == -1) {
878 62ee7d94 2023-01-10 thomas err = got_error_from_errno("asprintf");
879 62ee7d94 2023-01-10 thomas goto done;
882 62ee7d94 2023-01-10 thomas err = got_opentemp_named_fd(&pack_path, &packfd, basepath, "");
884 62ee7d94 2023-01-10 thomas goto done;
885 851a5b48 2023-02-03 thomas if (fchmod(packfd, GOT_DEFAULT_PACK_MODE) == -1) {
886 851a5b48 2023-02-03 thomas err = got_error_from_errno2("fchmod", pack_path);
887 851a5b48 2023-02-03 thomas goto done;
890 62ee7d94 2023-01-10 thomas free(basepath);
891 62ee7d94 2023-01-10 thomas if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.idx",
892 62ee7d94 2023-01-10 thomas got_repo_get_path(gotd_session.repo), GOT_OBJECTS_PACK_DIR,
893 62ee7d94 2023-01-10 thomas client->euid) == -1) {
894 62ee7d94 2023-01-10 thomas err = got_error_from_errno("asprintf");
895 62ee7d94 2023-01-10 thomas basepath = NULL;
896 62ee7d94 2023-01-10 thomas goto done;
898 62ee7d94 2023-01-10 thomas err = got_opentemp_named_fd(&idx_path, &idxfd, basepath, "");
900 62ee7d94 2023-01-10 thomas goto done;
901 851a5b48 2023-02-03 thomas if (fchmod(idxfd, GOT_DEFAULT_PACK_MODE) == -1) {
902 851a5b48 2023-02-03 thomas err = got_error_from_errno2("fchmod", idx_path);
903 851a5b48 2023-02-03 thomas goto done;
906 62ee7d94 2023-01-10 thomas memset(&ifile, 0, sizeof(ifile));
907 62ee7d94 2023-01-10 thomas ifile.client_id = client->id;
908 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
909 62ee7d94 2023-01-10 thomas GOTD_IMSG_PACKIDX_FILE, PROC_SESSION,
910 62ee7d94 2023-01-10 thomas idxfd, &ifile, sizeof(ifile)) == -1) {
911 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose PACKIDX_FILE");
912 62ee7d94 2023-01-10 thomas idxfd = -1;
913 62ee7d94 2023-01-10 thomas goto done;
915 62ee7d94 2023-01-10 thomas idxfd = -1;
917 62ee7d94 2023-01-10 thomas memset(&ipack, 0, sizeof(ipack));
918 62ee7d94 2023-01-10 thomas ipack.client_id = client->id;
919 62ee7d94 2023-01-10 thomas if (client_has_capability(client, GOT_CAPA_REPORT_STATUS))
920 62ee7d94 2023-01-10 thomas ipack.report_status = 1;
922 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
923 62ee7d94 2023-01-10 thomas GOTD_IMSG_RECV_PACKFILE, PROC_SESSION, packfd,
924 62ee7d94 2023-01-10 thomas &ipack, sizeof(ipack)) == -1) {
925 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose RECV_PACKFILE");
926 62ee7d94 2023-01-10 thomas packfd = -1;
927 62ee7d94 2023-01-10 thomas goto done;
929 62ee7d94 2023-01-10 thomas packfd = -1;
932 62ee7d94 2023-01-10 thomas free(basepath);
933 62ee7d94 2023-01-10 thomas if (pipe[0] != -1 && close(pipe[0]) == -1 && err == NULL)
934 62ee7d94 2023-01-10 thomas err = got_error_from_errno("close");
935 62ee7d94 2023-01-10 thomas if (pipe[1] != -1 && close(pipe[1]) == -1 && err == NULL)
936 62ee7d94 2023-01-10 thomas err = got_error_from_errno("close");
937 62ee7d94 2023-01-10 thomas if (packfd != -1 && close(packfd) == -1 && err == NULL)
938 62ee7d94 2023-01-10 thomas err = got_error_from_errno("close");
939 62ee7d94 2023-01-10 thomas if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
940 62ee7d94 2023-01-10 thomas err = got_error_from_errno("close");
941 62ee7d94 2023-01-10 thomas if (err) {
942 62ee7d94 2023-01-10 thomas free(pack_path);
943 62ee7d94 2023-01-10 thomas free(idx_path);
945 62ee7d94 2023-01-10 thomas client->packfile_path = pack_path;
946 62ee7d94 2023-01-10 thomas client->packidx_path = idx_path;
948 62ee7d94 2023-01-10 thomas return err;
951 62ee7d94 2023-01-10 thomas static const struct got_error *
952 62ee7d94 2023-01-10 thomas send_packfile(struct gotd_session_client *client)
954 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
955 62ee7d94 2023-01-10 thomas struct gotd_imsg_send_packfile ipack;
956 62ee7d94 2023-01-10 thomas struct gotd_imsg_packfile_pipe ipipe;
957 62ee7d94 2023-01-10 thomas int pipe[2];
959 62ee7d94 2023-01-10 thomas if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
960 62ee7d94 2023-01-10 thomas return got_error_from_errno("socketpair");
962 62ee7d94 2023-01-10 thomas memset(&ipack, 0, sizeof(ipack));
963 62ee7d94 2023-01-10 thomas memset(&ipipe, 0, sizeof(ipipe));
965 62ee7d94 2023-01-10 thomas ipack.client_id = client->id;
966 62ee7d94 2023-01-10 thomas if (client_has_capability(client, GOT_CAPA_SIDE_BAND_64K))
967 62ee7d94 2023-01-10 thomas ipack.report_progress = 1;
969 62ee7d94 2023-01-10 thomas client->delta_cache_fd = got_opentempfd();
970 62ee7d94 2023-01-10 thomas if (client->delta_cache_fd == -1)
971 62ee7d94 2023-01-10 thomas return got_error_from_errno("got_opentempfd");
973 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
974 62ee7d94 2023-01-10 thomas GOTD_IMSG_SEND_PACKFILE, PROC_GOTD, client->delta_cache_fd,
975 62ee7d94 2023-01-10 thomas &ipack, sizeof(ipack)) == -1) {
976 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose SEND_PACKFILE");
977 62ee7d94 2023-01-10 thomas close(pipe[0]);
978 62ee7d94 2023-01-10 thomas close(pipe[1]);
979 62ee7d94 2023-01-10 thomas return err;
982 62ee7d94 2023-01-10 thomas ipipe.client_id = client->id;
984 62ee7d94 2023-01-10 thomas /* Send pack pipe end 0 to repo child process. */
985 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
986 62ee7d94 2023-01-10 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD,
987 62ee7d94 2023-01-10 thomas pipe[0], &ipipe, sizeof(ipipe)) == -1) {
988 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
989 62ee7d94 2023-01-10 thomas close(pipe[1]);
990 62ee7d94 2023-01-10 thomas return err;
993 62ee7d94 2023-01-10 thomas /* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
994 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->iev,
995 62ee7d94 2023-01-10 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1], NULL, 0) == -1)
996 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
998 62ee7d94 2023-01-10 thomas return err;
1001 62ee7d94 2023-01-10 thomas static void
1002 8cb46987 2023-02-07 thomas session_dispatch_client(int fd, short events, void *arg)
1004 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = arg;
1005 62ee7d94 2023-01-10 thomas struct imsgbuf *ibuf = &iev->ibuf;
1006 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
1007 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
1008 62ee7d94 2023-01-10 thomas struct imsg imsg;
1009 62ee7d94 2023-01-10 thomas ssize_t n;
1011 62ee7d94 2023-01-10 thomas if (events & EV_WRITE) {
1012 62ee7d94 2023-01-10 thomas while (ibuf->w.queued) {
1013 62ee7d94 2023-01-10 thomas n = msgbuf_write(&ibuf->w);
1014 62ee7d94 2023-01-10 thomas if (n == -1 && errno == EPIPE) {
1016 62ee7d94 2023-01-10 thomas * The client has closed its socket.
1017 62ee7d94 2023-01-10 thomas * This can happen when Git clients are
1018 62ee7d94 2023-01-10 thomas * done sending pack file data.
1020 62ee7d94 2023-01-10 thomas msgbuf_clear(&ibuf->w);
1021 62ee7d94 2023-01-10 thomas continue;
1022 62ee7d94 2023-01-10 thomas } else if (n == -1 && errno != EAGAIN) {
1023 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg_flush");
1024 62ee7d94 2023-01-10 thomas disconnect_on_error(client, err);
1027 62ee7d94 2023-01-10 thomas if (n == 0) {
1028 62ee7d94 2023-01-10 thomas /* Connection closed. */
1029 62ee7d94 2023-01-10 thomas err = got_error(GOT_ERR_EOF);
1030 62ee7d94 2023-01-10 thomas disconnect_on_error(client, err);
1036 62ee7d94 2023-01-10 thomas if ((events & EV_READ) == 0)
1039 62ee7d94 2023-01-10 thomas memset(&imsg, 0, sizeof(imsg));
1041 62ee7d94 2023-01-10 thomas while (err == NULL) {
1042 62ee7d94 2023-01-10 thomas err = gotd_imsg_recv(&imsg, ibuf, 0);
1043 62ee7d94 2023-01-10 thomas if (err) {
1044 62ee7d94 2023-01-10 thomas if (err->code == GOT_ERR_PRIVSEP_READ)
1045 62ee7d94 2023-01-10 thomas err = NULL;
1049 62ee7d94 2023-01-10 thomas evtimer_del(&client->tmo);
1051 62ee7d94 2023-01-10 thomas switch (imsg.hdr.type) {
1052 62ee7d94 2023-01-10 thomas case GOTD_IMSG_CAPABILITIES:
1053 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1054 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1055 62ee7d94 2023-01-10 thomas "unexpected capabilities received");
1058 62ee7d94 2023-01-10 thomas log_debug("receiving capabilities from uid %d",
1059 62ee7d94 2023-01-10 thomas client->euid);
1060 62ee7d94 2023-01-10 thomas err = recv_capabilities(client, &imsg);
1062 62ee7d94 2023-01-10 thomas case GOTD_IMSG_CAPABILITY:
1063 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1064 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1065 62ee7d94 2023-01-10 thomas "unexpected capability received");
1068 62ee7d94 2023-01-10 thomas err = recv_capability(client, &imsg);
1069 62ee7d94 2023-01-10 thomas if (err || client->ncapabilities < client->ncapa_alloc)
1071 62ee7d94 2023-01-10 thomas if (!client->is_writing) {
1072 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_WANT;
1073 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1074 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting want-lines",
1075 62ee7d94 2023-01-10 thomas client->euid);
1076 62ee7d94 2023-01-10 thomas } else if (client->is_writing) {
1077 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_REF_UPDATE;
1078 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1079 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting ref-update-lines",
1080 62ee7d94 2023-01-10 thomas client->euid);
1082 62ee7d94 2023-01-10 thomas fatalx("client %d is both reading and writing",
1083 62ee7d94 2023-01-10 thomas client->euid);
1085 62ee7d94 2023-01-10 thomas case GOTD_IMSG_WANT:
1086 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_WANT) {
1087 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1088 62ee7d94 2023-01-10 thomas "unexpected want-line received");
1091 62ee7d94 2023-01-10 thomas log_debug("received want-line from uid %d",
1092 62ee7d94 2023-01-10 thomas client->euid);
1093 62ee7d94 2023-01-10 thomas err = ensure_client_is_reading(client);
1094 62ee7d94 2023-01-10 thomas if (err)
1096 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1097 62ee7d94 2023-01-10 thomas err = forward_want(client, &imsg);
1099 62ee7d94 2023-01-10 thomas case GOTD_IMSG_REF_UPDATE:
1100 0445d8ec 2023-01-19 thomas if (client->state != GOTD_STATE_EXPECT_REF_UPDATE &&
1101 0445d8ec 2023-01-19 thomas client->state !=
1102 0445d8ec 2023-01-19 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1103 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1104 62ee7d94 2023-01-10 thomas "unexpected ref-update-line received");
1107 62ee7d94 2023-01-10 thomas log_debug("received ref-update-line from uid %d",
1108 62ee7d94 2023-01-10 thomas client->euid);
1109 62ee7d94 2023-01-10 thomas err = ensure_client_is_writing(client);
1110 62ee7d94 2023-01-10 thomas if (err)
1112 62ee7d94 2023-01-10 thomas err = forward_ref_update(client, &imsg);
1113 62ee7d94 2023-01-10 thomas if (err)
1115 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_MORE_REF_UPDATES;
1116 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1118 62ee7d94 2023-01-10 thomas case GOTD_IMSG_HAVE:
1119 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_HAVE) {
1120 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1121 62ee7d94 2023-01-10 thomas "unexpected have-line received");
1124 62ee7d94 2023-01-10 thomas log_debug("received have-line from uid %d",
1125 62ee7d94 2023-01-10 thomas client->euid);
1126 62ee7d94 2023-01-10 thomas err = ensure_client_is_reading(client);
1127 62ee7d94 2023-01-10 thomas if (err)
1129 62ee7d94 2023-01-10 thomas err = forward_have(client, &imsg);
1130 62ee7d94 2023-01-10 thomas if (err)
1132 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1134 62ee7d94 2023-01-10 thomas case GOTD_IMSG_FLUSH:
1135 62ee7d94 2023-01-10 thomas if (client->state == GOTD_STATE_EXPECT_WANT ||
1136 62ee7d94 2023-01-10 thomas client->state == GOTD_STATE_EXPECT_HAVE) {
1137 62ee7d94 2023-01-10 thomas err = ensure_client_is_reading(client);
1138 62ee7d94 2023-01-10 thomas if (err)
1140 62ee7d94 2023-01-10 thomas } else if (client->state ==
1141 62ee7d94 2023-01-10 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1142 62ee7d94 2023-01-10 thomas err = ensure_client_is_writing(client);
1143 62ee7d94 2023-01-10 thomas if (err)
1145 6110f5ef 2023-01-19 thomas } else if (client->state != GOTD_STATE_EXPECT_DONE) {
1146 98c7fd82 2023-01-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1147 98c7fd82 2023-01-23 thomas "unexpected flush-pkt received");
1150 98c7fd82 2023-01-23 thomas if (!client->accept_flush_pkt) {
1151 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1152 62ee7d94 2023-01-10 thomas "unexpected flush-pkt received");
1157 98c7fd82 2023-01-23 thomas * Accept just one flush packet at a time.
1158 98c7fd82 2023-01-23 thomas * Future client state transitions will set this flag
1159 98c7fd82 2023-01-23 thomas * again if another flush packet is expected.
1161 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 0;
1163 62ee7d94 2023-01-10 thomas log_debug("received flush-pkt from uid %d",
1164 62ee7d94 2023-01-10 thomas client->euid);
1165 62ee7d94 2023-01-10 thomas if (client->state == GOTD_STATE_EXPECT_WANT) {
1166 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_HAVE;
1167 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting have-lines",
1168 62ee7d94 2023-01-10 thomas client->euid);
1169 62ee7d94 2023-01-10 thomas } else if (client->state == GOTD_STATE_EXPECT_HAVE) {
1170 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_DONE;
1171 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1172 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting 'done'",
1173 62ee7d94 2023-01-10 thomas client->euid);
1174 62ee7d94 2023-01-10 thomas } else if (client->state ==
1175 62ee7d94 2023-01-10 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1176 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_PACKFILE;
1177 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting packfile",
1178 62ee7d94 2023-01-10 thomas client->euid);
1179 62ee7d94 2023-01-10 thomas err = recv_packfile(client);
1180 6110f5ef 2023-01-19 thomas } else if (client->state != GOTD_STATE_EXPECT_DONE) {
1181 62ee7d94 2023-01-10 thomas /* should not happen, see above */
1182 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1183 62ee7d94 2023-01-10 thomas "unexpected client state");
1187 62ee7d94 2023-01-10 thomas case GOTD_IMSG_DONE:
1188 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_HAVE &&
1189 62ee7d94 2023-01-10 thomas client->state != GOTD_STATE_EXPECT_DONE) {
1190 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1191 62ee7d94 2023-01-10 thomas "unexpected flush-pkt received");
1194 62ee7d94 2023-01-10 thomas log_debug("received 'done' from uid %d", client->euid);
1195 62ee7d94 2023-01-10 thomas err = ensure_client_is_reading(client);
1196 62ee7d94 2023-01-10 thomas if (err)
1198 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_DONE;
1199 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1200 62ee7d94 2023-01-10 thomas err = send_packfile(client);
1202 62ee7d94 2023-01-10 thomas default:
1203 62ee7d94 2023-01-10 thomas log_debug("unexpected imsg %d", imsg.hdr.type);
1204 62ee7d94 2023-01-10 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
1208 62ee7d94 2023-01-10 thomas imsg_free(&imsg);
1211 62ee7d94 2023-01-10 thomas if (err) {
1212 62ee7d94 2023-01-10 thomas if (err->code != GOT_ERR_EOF ||
1213 62ee7d94 2023-01-10 thomas client->state != GOTD_STATE_EXPECT_PACKFILE)
1214 62ee7d94 2023-01-10 thomas disconnect_on_error(client, err);
1215 62ee7d94 2023-01-10 thomas } else {
1216 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(iev);
1217 62ee7d94 2023-01-10 thomas evtimer_add(&client->tmo, &gotd_session.request_timeout);
1221 62ee7d94 2023-01-10 thomas static const struct got_error *
1222 62ee7d94 2023-01-10 thomas list_refs_request(void)
1224 62ee7d94 2023-01-10 thomas static const struct got_error *err;
1225 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
1226 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = &client->repo_child_iev;
1227 62ee7d94 2023-01-10 thomas struct gotd_imsg_list_refs_internal ilref;
1230 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1231 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1233 62ee7d94 2023-01-10 thomas memset(&ilref, 0, sizeof(ilref));
1234 62ee7d94 2023-01-10 thomas ilref.client_id = client->id;
1236 62ee7d94 2023-01-10 thomas fd = dup(client->fd);
1237 62ee7d94 2023-01-10 thomas if (fd == -1)
1238 62ee7d94 2023-01-10 thomas return got_error_from_errno("dup");
1240 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(iev, GOTD_IMSG_LIST_REFS_INTERNAL,
1241 62ee7d94 2023-01-10 thomas PROC_SESSION, fd, &ilref, sizeof(ilref)) == -1) {
1242 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose LIST_REFS_INTERNAL");
1243 62ee7d94 2023-01-10 thomas close(fd);
1244 62ee7d94 2023-01-10 thomas return err;
1247 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_CAPABILITIES;
1248 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting capabilities", client->euid);
1249 62ee7d94 2023-01-10 thomas return NULL;
1252 62ee7d94 2023-01-10 thomas static const struct got_error *
1253 62ee7d94 2023-01-10 thomas recv_connect(struct imsg *imsg)
1255 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
1256 62ee7d94 2023-01-10 thomas struct gotd_imsg_connect iconnect;
1257 62ee7d94 2023-01-10 thomas size_t datalen;
1259 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1260 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1262 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1263 62ee7d94 2023-01-10 thomas if (datalen != sizeof(iconnect))
1264 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1265 62ee7d94 2023-01-10 thomas memcpy(&iconnect, imsg->data, sizeof(iconnect));
1267 62ee7d94 2023-01-10 thomas if (imsg->fd == -1)
1268 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_NO_FD);
1270 62ee7d94 2023-01-10 thomas client->fd = imsg->fd;
1271 62ee7d94 2023-01-10 thomas client->euid = iconnect.euid;
1272 62ee7d94 2023-01-10 thomas client->egid = iconnect.egid;
1274 62ee7d94 2023-01-10 thomas imsg_init(&client->iev.ibuf, client->fd);
1275 8cb46987 2023-02-07 thomas client->iev.handler = session_dispatch_client;
1276 62ee7d94 2023-01-10 thomas client->iev.events = EV_READ;
1277 62ee7d94 2023-01-10 thomas client->iev.handler_arg = NULL;
1278 62ee7d94 2023-01-10 thomas event_set(&client->iev.ev, client->iev.ibuf.fd, EV_READ,
1279 8cb46987 2023-02-07 thomas session_dispatch_client, &client->iev);
1280 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(&client->iev);
1281 62ee7d94 2023-01-10 thomas evtimer_set(&client->tmo, gotd_request_timeout, client);
1283 62ee7d94 2023-01-10 thomas return NULL;
1286 62ee7d94 2023-01-10 thomas static const struct got_error *
1287 62ee7d94 2023-01-10 thomas recv_repo_child(struct imsg *imsg)
1289 62ee7d94 2023-01-10 thomas struct gotd_imsg_connect_repo_child ichild;
1290 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
1291 62ee7d94 2023-01-10 thomas size_t datalen;
1293 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1294 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1296 62ee7d94 2023-01-10 thomas /* We should already have received a pipe to the listener. */
1297 62ee7d94 2023-01-10 thomas if (client->fd == -1)
1298 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1300 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1301 62ee7d94 2023-01-10 thomas if (datalen != sizeof(ichild))
1302 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1304 62ee7d94 2023-01-10 thomas memcpy(&ichild, imsg->data, sizeof(ichild));
1306 62ee7d94 2023-01-10 thomas client->id = ichild.client_id;
1307 62ee7d94 2023-01-10 thomas if (ichild.proc_id == PROC_REPO_WRITE)
1308 62ee7d94 2023-01-10 thomas client->is_writing = 1;
1309 62ee7d94 2023-01-10 thomas else if (ichild.proc_id == PROC_REPO_READ)
1310 62ee7d94 2023-01-10 thomas client->is_writing = 0;
1312 62ee7d94 2023-01-10 thomas return got_error_msg(GOT_ERR_PRIVSEP_MSG,
1313 62ee7d94 2023-01-10 thomas "bad child process type");
1315 62ee7d94 2023-01-10 thomas if (imsg->fd == -1)
1316 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_NO_FD);
1318 62ee7d94 2023-01-10 thomas imsg_init(&client->repo_child_iev.ibuf, imsg->fd);
1319 62ee7d94 2023-01-10 thomas client->repo_child_iev.handler = session_dispatch_repo_child;
1320 62ee7d94 2023-01-10 thomas client->repo_child_iev.events = EV_READ;
1321 62ee7d94 2023-01-10 thomas client->repo_child_iev.handler_arg = NULL;
1322 62ee7d94 2023-01-10 thomas event_set(&client->repo_child_iev.ev, client->repo_child_iev.ibuf.fd,
1323 62ee7d94 2023-01-10 thomas EV_READ, session_dispatch_repo_child, &client->repo_child_iev);
1324 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(&client->repo_child_iev);
1326 62ee7d94 2023-01-10 thomas /* The "recvfd" pledge promise is no longer needed. */
1327 62ee7d94 2023-01-10 thomas if (pledge("stdio rpath wpath cpath sendfd fattr flock", NULL) == -1)
1328 62ee7d94 2023-01-10 thomas fatal("pledge");
1330 62ee7d94 2023-01-10 thomas return NULL;
1333 62ee7d94 2023-01-10 thomas static void
1334 62ee7d94 2023-01-10 thomas session_dispatch(int fd, short event, void *arg)
1336 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = arg;
1337 62ee7d94 2023-01-10 thomas struct imsgbuf *ibuf = &iev->ibuf;
1338 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
1339 62ee7d94 2023-01-10 thomas ssize_t n;
1340 62ee7d94 2023-01-10 thomas int shut = 0;
1341 62ee7d94 2023-01-10 thomas struct imsg imsg;
1343 62ee7d94 2023-01-10 thomas if (event & EV_READ) {
1344 62ee7d94 2023-01-10 thomas if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1345 62ee7d94 2023-01-10 thomas fatal("imsg_read error");
1346 62ee7d94 2023-01-10 thomas if (n == 0) {
1347 62ee7d94 2023-01-10 thomas /* Connection closed. */
1348 62ee7d94 2023-01-10 thomas shut = 1;
1349 62ee7d94 2023-01-10 thomas goto done;
1353 62ee7d94 2023-01-10 thomas if (event & EV_WRITE) {
1354 62ee7d94 2023-01-10 thomas n = msgbuf_write(&ibuf->w);
1355 62ee7d94 2023-01-10 thomas if (n == -1 && errno != EAGAIN)
1356 62ee7d94 2023-01-10 thomas fatal("msgbuf_write");
1357 62ee7d94 2023-01-10 thomas if (n == 0) {
1358 62ee7d94 2023-01-10 thomas /* Connection closed. */
1359 62ee7d94 2023-01-10 thomas shut = 1;
1360 62ee7d94 2023-01-10 thomas goto done;
1364 62ee7d94 2023-01-10 thomas for (;;) {
1365 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
1366 62ee7d94 2023-01-10 thomas uint32_t client_id = 0;
1367 62ee7d94 2023-01-10 thomas int do_disconnect = 0, do_list_refs = 0;
1369 62ee7d94 2023-01-10 thomas if ((n = imsg_get(ibuf, &imsg)) == -1)
1370 62ee7d94 2023-01-10 thomas fatal("%s: imsg_get error", __func__);
1371 62ee7d94 2023-01-10 thomas if (n == 0) /* No more messages. */
1374 62ee7d94 2023-01-10 thomas switch (imsg.hdr.type) {
1375 62ee7d94 2023-01-10 thomas case GOTD_IMSG_ERROR:
1376 62ee7d94 2023-01-10 thomas do_disconnect = 1;
1377 62ee7d94 2023-01-10 thomas err = gotd_imsg_recv_error(&client_id, &imsg);
1379 62ee7d94 2023-01-10 thomas case GOTD_IMSG_CONNECT:
1380 62ee7d94 2023-01-10 thomas err = recv_connect(&imsg);
1382 62ee7d94 2023-01-10 thomas case GOTD_IMSG_DISCONNECT:
1383 62ee7d94 2023-01-10 thomas do_disconnect = 1;
1385 62ee7d94 2023-01-10 thomas case GOTD_IMSG_CONNECT_REPO_CHILD:
1386 62ee7d94 2023-01-10 thomas err = recv_repo_child(&imsg);
1387 62ee7d94 2023-01-10 thomas if (err)
1389 62ee7d94 2023-01-10 thomas do_list_refs = 1;
1391 62ee7d94 2023-01-10 thomas default:
1392 62ee7d94 2023-01-10 thomas log_debug("unexpected imsg %d", imsg.hdr.type);
1395 62ee7d94 2023-01-10 thomas imsg_free(&imsg);
1397 62ee7d94 2023-01-10 thomas if (do_disconnect) {
1398 62ee7d94 2023-01-10 thomas if (err)
1399 62ee7d94 2023-01-10 thomas disconnect_on_error(client, err);
1401 62ee7d94 2023-01-10 thomas disconnect(client);
1402 62ee7d94 2023-01-10 thomas } else if (do_list_refs)
1403 62ee7d94 2023-01-10 thomas err = list_refs_request();
1405 62ee7d94 2023-01-10 thomas if (err)
1406 62ee7d94 2023-01-10 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1409 62ee7d94 2023-01-10 thomas if (!shut) {
1410 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(iev);
1411 62ee7d94 2023-01-10 thomas } else {
1412 62ee7d94 2023-01-10 thomas /* This pipe is dead. Remove its event handler */
1413 62ee7d94 2023-01-10 thomas event_del(&iev->ev);
1414 62ee7d94 2023-01-10 thomas event_loopexit(NULL);
1419 62ee7d94 2023-01-10 thomas session_main(const char *title, const char *repo_path,
1420 62ee7d94 2023-01-10 thomas int *pack_fds, int *temp_fds, struct timeval *request_timeout)
1422 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
1423 62ee7d94 2023-01-10 thomas struct event evsigint, evsigterm, evsighup, evsigusr1;
1425 62ee7d94 2023-01-10 thomas gotd_session.title = title;
1426 62ee7d94 2023-01-10 thomas gotd_session.pid = getpid();
1427 62ee7d94 2023-01-10 thomas gotd_session.pack_fds = pack_fds;
1428 62ee7d94 2023-01-10 thomas gotd_session.temp_fds = temp_fds;
1429 62ee7d94 2023-01-10 thomas memcpy(&gotd_session.request_timeout, request_timeout,
1430 62ee7d94 2023-01-10 thomas sizeof(gotd_session.request_timeout));
1432 62ee7d94 2023-01-10 thomas err = got_repo_open(&gotd_session.repo, repo_path, NULL, pack_fds);
1433 62ee7d94 2023-01-10 thomas if (err)
1434 62ee7d94 2023-01-10 thomas goto done;
1435 62ee7d94 2023-01-10 thomas if (!got_repo_is_bare(gotd_session.repo)) {
1436 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_NOT_GIT_REPO,
1437 62ee7d94 2023-01-10 thomas "bare git repository required");
1438 62ee7d94 2023-01-10 thomas goto done;
1441 62ee7d94 2023-01-10 thomas got_repo_temp_fds_set(gotd_session.repo, temp_fds);
1443 62ee7d94 2023-01-10 thomas signal_set(&evsigint, SIGINT, gotd_session_sighdlr, NULL);
1444 62ee7d94 2023-01-10 thomas signal_set(&evsigterm, SIGTERM, gotd_session_sighdlr, NULL);
1445 62ee7d94 2023-01-10 thomas signal_set(&evsighup, SIGHUP, gotd_session_sighdlr, NULL);
1446 62ee7d94 2023-01-10 thomas signal_set(&evsigusr1, SIGUSR1, gotd_session_sighdlr, NULL);
1447 62ee7d94 2023-01-10 thomas signal(SIGPIPE, SIG_IGN);
1449 62ee7d94 2023-01-10 thomas signal_add(&evsigint, NULL);
1450 62ee7d94 2023-01-10 thomas signal_add(&evsigterm, NULL);
1451 62ee7d94 2023-01-10 thomas signal_add(&evsighup, NULL);
1452 62ee7d94 2023-01-10 thomas signal_add(&evsigusr1, NULL);
1454 62ee7d94 2023-01-10 thomas gotd_session_client.state = GOTD_STATE_EXPECT_LIST_REFS;
1455 62ee7d94 2023-01-10 thomas gotd_session_client.fd = -1;
1456 62ee7d94 2023-01-10 thomas gotd_session_client.nref_updates = -1;
1457 a6f25078 2023-01-10 thomas gotd_session_client.delta_cache_fd = -1;
1458 98c7fd82 2023-01-23 thomas gotd_session_client.accept_flush_pkt = 1;
1460 62ee7d94 2023-01-10 thomas imsg_init(&gotd_session.parent_iev.ibuf, GOTD_FILENO_MSG_PIPE);
1461 62ee7d94 2023-01-10 thomas gotd_session.parent_iev.handler = session_dispatch;
1462 62ee7d94 2023-01-10 thomas gotd_session.parent_iev.events = EV_READ;
1463 62ee7d94 2023-01-10 thomas gotd_session.parent_iev.handler_arg = NULL;
1464 62ee7d94 2023-01-10 thomas event_set(&gotd_session.parent_iev.ev, gotd_session.parent_iev.ibuf.fd,
1465 62ee7d94 2023-01-10 thomas EV_READ, session_dispatch, &gotd_session.parent_iev);
1466 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&gotd_session.parent_iev,
1467 62ee7d94 2023-01-10 thomas GOTD_IMSG_CLIENT_SESSION_READY, PROC_SESSION, -1, NULL, 0) == -1) {
1468 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose CLIENT_SESSION_READY");
1469 62ee7d94 2023-01-10 thomas goto done;
1472 62ee7d94 2023-01-10 thomas event_dispatch();
1474 62ee7d94 2023-01-10 thomas if (err)
1475 62ee7d94 2023-01-10 thomas log_warnx("%s: %s", title, err->msg);
1476 62ee7d94 2023-01-10 thomas gotd_session_shutdown();
1480 62ee7d94 2023-01-10 thomas gotd_session_shutdown(void)
1482 5330ab76 2023-02-17 thomas log_debug("shutting down");
1483 62ee7d94 2023-01-10 thomas if (gotd_session.repo)
1484 62ee7d94 2023-01-10 thomas got_repo_close(gotd_session.repo);
1485 62ee7d94 2023-01-10 thomas got_repo_pack_fds_close(gotd_session.pack_fds);
1486 62ee7d94 2023-01-10 thomas got_repo_temp_fds_close(gotd_session.temp_fds);
1487 62ee7d94 2023-01-10 thomas exit(0);
