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 4efc8dcb 2023-08-29 thomas #include "got_compat.h"
19 62ee7d94 2023-01-10 thomas #include <sys/types.h>
20 62ee7d94 2023-01-10 thomas #include <sys/queue.h>
21 62ee7d94 2023-01-10 thomas #include <sys/socket.h>
22 851a5b48 2023-02-03 thomas #include <sys/stat.h>
23 62ee7d94 2023-01-10 thomas #include <sys/uio.h>
25 62ee7d94 2023-01-10 thomas #include <errno.h>
26 62ee7d94 2023-01-10 thomas #include <event.h>
27 62ee7d94 2023-01-10 thomas #include <limits.h>
28 62ee7d94 2023-01-10 thomas #include <signal.h>
29 62ee7d94 2023-01-10 thomas #include <stdint.h>
30 62ee7d94 2023-01-10 thomas #include <stdio.h>
31 62ee7d94 2023-01-10 thomas #include <stdlib.h>
32 62ee7d94 2023-01-10 thomas #include <string.h>
33 62ee7d94 2023-01-10 thomas #include <imsg.h>
34 62ee7d94 2023-01-10 thomas #include <unistd.h>
36 febe25b7 2023-08-29 thomas #include "got_compat.h"
38 62ee7d94 2023-01-10 thomas #include "got_error.h"
39 62ee7d94 2023-01-10 thomas #include "got_repository.h"
40 62ee7d94 2023-01-10 thomas #include "got_object.h"
41 62ee7d94 2023-01-10 thomas #include "got_path.h"
42 62ee7d94 2023-01-10 thomas #include "got_reference.h"
43 62ee7d94 2023-01-10 thomas #include "got_opentemp.h"
45 be288a59 2023-02-23 thomas #include "got_lib_hash.h"
46 62ee7d94 2023-01-10 thomas #include "got_lib_delta.h"
47 62ee7d94 2023-01-10 thomas #include "got_lib_object.h"
48 62ee7d94 2023-01-10 thomas #include "got_lib_object_cache.h"
49 62ee7d94 2023-01-10 thomas #include "got_lib_pack.h"
50 62ee7d94 2023-01-10 thomas #include "got_lib_repository.h"
51 62ee7d94 2023-01-10 thomas #include "got_lib_gitproto.h"
53 62ee7d94 2023-01-10 thomas #include "gotd.h"
54 62ee7d94 2023-01-10 thomas #include "log.h"
55 62ee7d94 2023-01-10 thomas #include "session.h"
58 62ee7d94 2023-01-10 thomas static struct gotd_session {
59 62ee7d94 2023-01-10 thomas pid_t pid;
60 62ee7d94 2023-01-10 thomas const char *title;
61 62ee7d94 2023-01-10 thomas struct got_repository *repo;
62 62ee7d94 2023-01-10 thomas int *pack_fds;
63 62ee7d94 2023-01-10 thomas int *temp_fds;
64 62ee7d94 2023-01-10 thomas struct gotd_imsgev parent_iev;
65 62ee7d94 2023-01-10 thomas struct timeval request_timeout;
66 7fed8fa4 2023-06-22 thomas enum gotd_procid proc_id;
67 62ee7d94 2023-01-10 thomas } gotd_session;
69 62ee7d94 2023-01-10 thomas static struct gotd_session_client {
70 7b1db75e 2023-01-14 thomas enum gotd_session_state state;
71 62ee7d94 2023-01-10 thomas int is_writing;
72 62ee7d94 2023-01-10 thomas struct gotd_client_capability *capabilities;
73 62ee7d94 2023-01-10 thomas size_t ncapa_alloc;
74 62ee7d94 2023-01-10 thomas size_t ncapabilities;
75 62ee7d94 2023-01-10 thomas uint32_t id;
77 62ee7d94 2023-01-10 thomas int delta_cache_fd;
78 62ee7d94 2023-01-10 thomas struct gotd_imsgev iev;
79 62ee7d94 2023-01-10 thomas struct gotd_imsgev repo_child_iev;
80 62ee7d94 2023-01-10 thomas struct event tmo;
81 62ee7d94 2023-01-10 thomas uid_t euid;
82 62ee7d94 2023-01-10 thomas gid_t egid;
83 62ee7d94 2023-01-10 thomas char *packfile_path;
84 62ee7d94 2023-01-10 thomas char *packidx_path;
85 62ee7d94 2023-01-10 thomas int nref_updates;
86 98c7fd82 2023-01-23 thomas int accept_flush_pkt;
87 c8b73ac1 2023-08-23 thomas int flush_disconnect;
88 62ee7d94 2023-01-10 thomas } gotd_session_client;
90 62ee7d94 2023-01-10 thomas void gotd_session_sighdlr(int sig, short event, void *arg);
91 62ee7d94 2023-01-10 thomas static void gotd_session_shutdown(void);
93 62ee7d94 2023-01-10 thomas static void
94 62ee7d94 2023-01-10 thomas disconnect(struct gotd_session_client *client)
96 62ee7d94 2023-01-10 thomas log_debug("uid %d: disconnecting", client->euid);
98 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&gotd_session.parent_iev,
99 7fed8fa4 2023-06-22 thomas GOTD_IMSG_DISCONNECT, gotd_session.proc_id, -1, NULL, 0) == -1)
100 62ee7d94 2023-01-10 thomas log_warn("imsg compose DISCONNECT");
102 62ee7d94 2023-01-10 thomas imsg_clear(&client->repo_child_iev.ibuf);
103 62ee7d94 2023-01-10 thomas event_del(&client->repo_child_iev.ev);
104 62ee7d94 2023-01-10 thomas evtimer_del(&client->tmo);
105 62ee7d94 2023-01-10 thomas close(client->fd);
106 62ee7d94 2023-01-10 thomas if (client->delta_cache_fd != -1)
107 62ee7d94 2023-01-10 thomas close(client->delta_cache_fd);
108 62ee7d94 2023-01-10 thomas if (client->packfile_path) {
109 62ee7d94 2023-01-10 thomas if (unlink(client->packfile_path) == -1 && errno != ENOENT)
110 62ee7d94 2023-01-10 thomas log_warn("unlink %s: ", client->packfile_path);
111 62ee7d94 2023-01-10 thomas free(client->packfile_path);
113 62ee7d94 2023-01-10 thomas if (client->packidx_path) {
114 62ee7d94 2023-01-10 thomas if (unlink(client->packidx_path) == -1 && errno != ENOENT)
115 62ee7d94 2023-01-10 thomas log_warn("unlink %s: ", client->packidx_path);
116 62ee7d94 2023-01-10 thomas free(client->packidx_path);
118 62ee7d94 2023-01-10 thomas free(client->capabilities);
120 62ee7d94 2023-01-10 thomas gotd_session_shutdown();
123 62ee7d94 2023-01-10 thomas static void
124 62ee7d94 2023-01-10 thomas disconnect_on_error(struct gotd_session_client *client,
125 62ee7d94 2023-01-10 thomas const struct got_error *err)
127 62ee7d94 2023-01-10 thomas struct imsgbuf ibuf;
129 62ee7d94 2023-01-10 thomas if (err->code != GOT_ERR_EOF) {
130 a6153ffb 2023-08-12 thomas log_warnx("uid %d: %s", client->euid, err->msg);
131 62ee7d94 2023-01-10 thomas imsg_init(&ibuf, client->fd);
132 7fed8fa4 2023-06-22 thomas gotd_imsg_send_error(&ibuf, 0, gotd_session.proc_id, err);
133 62ee7d94 2023-01-10 thomas imsg_clear(&ibuf);
136 62ee7d94 2023-01-10 thomas disconnect(client);
139 62ee7d94 2023-01-10 thomas static void
140 62ee7d94 2023-01-10 thomas gotd_request_timeout(int fd, short events, void *arg)
142 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = arg;
144 62ee7d94 2023-01-10 thomas log_debug("disconnecting uid %d due to timeout", client->euid);
145 62ee7d94 2023-01-10 thomas disconnect(client);
149 62ee7d94 2023-01-10 thomas gotd_session_sighdlr(int sig, short event, void *arg)
152 62ee7d94 2023-01-10 thomas * Normal signal handler rules don't apply because libevent
153 62ee7d94 2023-01-10 thomas * decouples for us.
156 62ee7d94 2023-01-10 thomas switch (sig) {
157 62ee7d94 2023-01-10 thomas case SIGHUP:
158 62ee7d94 2023-01-10 thomas log_info("%s: ignoring SIGHUP", __func__);
160 62ee7d94 2023-01-10 thomas case SIGUSR1:
161 62ee7d94 2023-01-10 thomas log_info("%s: ignoring SIGUSR1", __func__);
163 62ee7d94 2023-01-10 thomas case SIGTERM:
164 62ee7d94 2023-01-10 thomas case SIGINT:
165 62ee7d94 2023-01-10 thomas gotd_session_shutdown();
166 62ee7d94 2023-01-10 thomas /* NOTREACHED */
169 62ee7d94 2023-01-10 thomas fatalx("unexpected signal");
173 62ee7d94 2023-01-10 thomas static const struct got_error *
174 62ee7d94 2023-01-10 thomas recv_packfile_done(uint32_t *client_id, struct imsg *imsg)
176 62ee7d94 2023-01-10 thomas struct gotd_imsg_packfile_done idone;
177 62ee7d94 2023-01-10 thomas size_t datalen;
179 62ee7d94 2023-01-10 thomas log_debug("packfile-done received");
181 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
182 62ee7d94 2023-01-10 thomas if (datalen != sizeof(idone))
183 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
184 62ee7d94 2023-01-10 thomas memcpy(&idone, imsg->data, sizeof(idone));
186 62ee7d94 2023-01-10 thomas *client_id = idone.client_id;
187 62ee7d94 2023-01-10 thomas return NULL;
190 62ee7d94 2023-01-10 thomas static const struct got_error *
191 62ee7d94 2023-01-10 thomas recv_packfile_install(uint32_t *client_id, struct imsg *imsg)
193 62ee7d94 2023-01-10 thomas struct gotd_imsg_packfile_install inst;
194 62ee7d94 2023-01-10 thomas size_t datalen;
196 62ee7d94 2023-01-10 thomas log_debug("packfile-install received");
198 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
199 62ee7d94 2023-01-10 thomas if (datalen != sizeof(inst))
200 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
201 62ee7d94 2023-01-10 thomas memcpy(&inst, imsg->data, sizeof(inst));
203 62ee7d94 2023-01-10 thomas *client_id = inst.client_id;
204 62ee7d94 2023-01-10 thomas return NULL;
207 62ee7d94 2023-01-10 thomas static const struct got_error *
208 62ee7d94 2023-01-10 thomas recv_ref_updates_start(uint32_t *client_id, struct imsg *imsg)
210 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_updates_start istart;
211 62ee7d94 2023-01-10 thomas size_t datalen;
213 62ee7d94 2023-01-10 thomas log_debug("ref-updates-start received");
215 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
216 62ee7d94 2023-01-10 thomas if (datalen != sizeof(istart))
217 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
218 62ee7d94 2023-01-10 thomas memcpy(&istart, imsg->data, sizeof(istart));
220 62ee7d94 2023-01-10 thomas *client_id = istart.client_id;
221 62ee7d94 2023-01-10 thomas return NULL;
224 62ee7d94 2023-01-10 thomas static const struct got_error *
225 62ee7d94 2023-01-10 thomas recv_ref_update(uint32_t *client_id, struct imsg *imsg)
227 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update iref;
228 62ee7d94 2023-01-10 thomas size_t datalen;
230 62ee7d94 2023-01-10 thomas log_debug("ref-update received");
232 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
233 62ee7d94 2023-01-10 thomas if (datalen < sizeof(iref))
234 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
235 62ee7d94 2023-01-10 thomas memcpy(&iref, imsg->data, sizeof(iref));
237 62ee7d94 2023-01-10 thomas *client_id = iref.client_id;
238 62ee7d94 2023-01-10 thomas return NULL;
241 62ee7d94 2023-01-10 thomas static const struct got_error *
242 62ee7d94 2023-01-10 thomas send_ref_update_ok(struct gotd_session_client *client,
243 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update *iref, const char *refname)
245 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update_ok iok;
246 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = &client->iev;
247 62ee7d94 2023-01-10 thomas struct ibuf *wbuf;
248 62ee7d94 2023-01-10 thomas size_t len;
250 62ee7d94 2023-01-10 thomas memset(&iok, 0, sizeof(iok));
251 62ee7d94 2023-01-10 thomas iok.client_id = client->id;
252 62ee7d94 2023-01-10 thomas memcpy(iok.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
253 62ee7d94 2023-01-10 thomas memcpy(iok.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
254 62ee7d94 2023-01-10 thomas iok.name_len = strlen(refname);
256 62ee7d94 2023-01-10 thomas len = sizeof(iok) + iok.name_len;
257 62ee7d94 2023-01-10 thomas wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_REF_UPDATE_OK,
258 7fed8fa4 2023-06-22 thomas gotd_session.proc_id, gotd_session.pid, len);
259 62ee7d94 2023-01-10 thomas if (wbuf == NULL)
260 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_create REF_UPDATE_OK");
262 62ee7d94 2023-01-10 thomas if (imsg_add(wbuf, &iok, sizeof(iok)) == -1)
263 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_add REF_UPDATE_OK");
264 62ee7d94 2023-01-10 thomas if (imsg_add(wbuf, refname, iok.name_len) == -1)
265 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_add REF_UPDATE_OK");
267 62ee7d94 2023-01-10 thomas imsg_close(&iev->ibuf, wbuf);
268 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(iev);
269 62ee7d94 2023-01-10 thomas return NULL;
272 62ee7d94 2023-01-10 thomas static void
273 62ee7d94 2023-01-10 thomas send_refs_updated(struct gotd_session_client *client)
275 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->iev, GOTD_IMSG_REFS_UPDATED,
276 7fed8fa4 2023-06-22 thomas gotd_session.proc_id, -1, NULL, 0) == -1)
277 62ee7d94 2023-01-10 thomas log_warn("imsg compose REFS_UPDATED");
280 62ee7d94 2023-01-10 thomas static const struct got_error *
281 62ee7d94 2023-01-10 thomas send_ref_update_ng(struct gotd_session_client *client,
282 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update *iref, const char *refname,
283 62ee7d94 2023-01-10 thomas const char *reason)
285 62ee7d94 2023-01-10 thomas const struct got_error *ng_err;
286 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update_ng ing;
287 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = &client->iev;
288 62ee7d94 2023-01-10 thomas struct ibuf *wbuf;
289 62ee7d94 2023-01-10 thomas size_t len;
291 62ee7d94 2023-01-10 thomas memset(&ing, 0, sizeof(ing));
292 62ee7d94 2023-01-10 thomas ing.client_id = client->id;
293 62ee7d94 2023-01-10 thomas memcpy(ing.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
294 62ee7d94 2023-01-10 thomas memcpy(ing.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
295 62ee7d94 2023-01-10 thomas ing.name_len = strlen(refname);
297 62ee7d94 2023-01-10 thomas ng_err = got_error_fmt(GOT_ERR_REF_BUSY, "%s", reason);
298 62ee7d94 2023-01-10 thomas ing.reason_len = strlen(ng_err->msg);
300 62ee7d94 2023-01-10 thomas len = sizeof(ing) + ing.name_len + ing.reason_len;
301 62ee7d94 2023-01-10 thomas wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_REF_UPDATE_NG,
302 7fed8fa4 2023-06-22 thomas gotd_session.proc_id, gotd_session.pid, len);
303 62ee7d94 2023-01-10 thomas if (wbuf == NULL)
304 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_create REF_UPDATE_NG");
306 62ee7d94 2023-01-10 thomas if (imsg_add(wbuf, &ing, sizeof(ing)) == -1)
307 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
308 62ee7d94 2023-01-10 thomas if (imsg_add(wbuf, refname, ing.name_len) == -1)
309 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
310 62ee7d94 2023-01-10 thomas if (imsg_add(wbuf, ng_err->msg, ing.reason_len) == -1)
311 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
313 62ee7d94 2023-01-10 thomas imsg_close(&iev->ibuf, wbuf);
314 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(iev);
315 62ee7d94 2023-01-10 thomas return NULL;
318 62ee7d94 2023-01-10 thomas static const struct got_error *
319 62ee7d94 2023-01-10 thomas install_pack(struct gotd_session_client *client, const char *repo_path,
320 62ee7d94 2023-01-10 thomas struct imsg *imsg)
322 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
323 62ee7d94 2023-01-10 thomas struct gotd_imsg_packfile_install inst;
324 62ee7d94 2023-01-10 thomas char hex[SHA1_DIGEST_STRING_LENGTH];
325 62ee7d94 2023-01-10 thomas size_t datalen;
326 62ee7d94 2023-01-10 thomas char *packfile_path = NULL, *packidx_path = NULL;
328 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
329 62ee7d94 2023-01-10 thomas if (datalen != sizeof(inst))
330 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
331 62ee7d94 2023-01-10 thomas memcpy(&inst, imsg->data, sizeof(inst));
333 62ee7d94 2023-01-10 thomas if (client->packfile_path == NULL)
334 62ee7d94 2023-01-10 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
335 62ee7d94 2023-01-10 thomas "client has no pack file");
336 62ee7d94 2023-01-10 thomas if (client->packidx_path == NULL)
337 62ee7d94 2023-01-10 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
338 62ee7d94 2023-01-10 thomas "client has no pack file index");
340 62ee7d94 2023-01-10 thomas if (got_sha1_digest_to_str(inst.pack_sha1, hex, sizeof(hex)) == NULL)
341 62ee7d94 2023-01-10 thomas return got_error_msg(GOT_ERR_NO_SPACE,
342 62ee7d94 2023-01-10 thomas "could not convert pack file SHA1 to hex");
344 62ee7d94 2023-01-10 thomas if (asprintf(&packfile_path, "/%s/%s/pack-%s.pack",
345 62ee7d94 2023-01-10 thomas repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
346 62ee7d94 2023-01-10 thomas err = got_error_from_errno("asprintf");
347 62ee7d94 2023-01-10 thomas goto done;
350 62ee7d94 2023-01-10 thomas if (asprintf(&packidx_path, "/%s/%s/pack-%s.idx",
351 62ee7d94 2023-01-10 thomas repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
352 62ee7d94 2023-01-10 thomas err = got_error_from_errno("asprintf");
353 62ee7d94 2023-01-10 thomas goto done;
356 62ee7d94 2023-01-10 thomas if (rename(client->packfile_path, packfile_path) == -1) {
357 62ee7d94 2023-01-10 thomas err = got_error_from_errno3("rename", client->packfile_path,
358 62ee7d94 2023-01-10 thomas packfile_path);
359 62ee7d94 2023-01-10 thomas goto done;
362 62ee7d94 2023-01-10 thomas free(client->packfile_path);
363 62ee7d94 2023-01-10 thomas client->packfile_path = NULL;
365 62ee7d94 2023-01-10 thomas if (rename(client->packidx_path, packidx_path) == -1) {
366 62ee7d94 2023-01-10 thomas err = got_error_from_errno3("rename", client->packidx_path,
367 62ee7d94 2023-01-10 thomas packidx_path);
368 62ee7d94 2023-01-10 thomas goto done;
371 342fdad2 2024-03-19 thomas /* Ensure we re-read the pack index list upon next access. */
372 342fdad2 2024-03-19 thomas gotd_session.repo->pack_path_mtime.tv_sec = 0;
373 342fdad2 2024-03-19 thomas gotd_session.repo->pack_path_mtime.tv_nsec = 0;
375 62ee7d94 2023-01-10 thomas free(client->packidx_path);
376 62ee7d94 2023-01-10 thomas client->packidx_path = NULL;
378 62ee7d94 2023-01-10 thomas free(packfile_path);
379 62ee7d94 2023-01-10 thomas free(packidx_path);
380 62ee7d94 2023-01-10 thomas return err;
383 62ee7d94 2023-01-10 thomas static const struct got_error *
384 62ee7d94 2023-01-10 thomas begin_ref_updates(struct gotd_session_client *client, struct imsg *imsg)
386 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_updates_start istart;
387 62ee7d94 2023-01-10 thomas size_t datalen;
389 62ee7d94 2023-01-10 thomas if (client->nref_updates != -1)
390 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
392 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
393 62ee7d94 2023-01-10 thomas if (datalen != sizeof(istart))
394 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
395 62ee7d94 2023-01-10 thomas memcpy(&istart, imsg->data, sizeof(istart));
397 62ee7d94 2023-01-10 thomas if (istart.nref_updates <= 0)
398 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
400 62ee7d94 2023-01-10 thomas client->nref_updates = istart.nref_updates;
401 62ee7d94 2023-01-10 thomas return NULL;
404 62ee7d94 2023-01-10 thomas static const struct got_error *
405 d98779cd 2023-01-19 thomas update_ref(int *shut, struct gotd_session_client *client,
406 d98779cd 2023-01-19 thomas const char *repo_path, struct imsg *imsg)
408 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
409 e8c5d4f8 2024-03-19 thomas struct got_repository *repo = gotd_session.repo;
410 62ee7d94 2023-01-10 thomas struct got_reference *ref = NULL;
411 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update iref;
412 62ee7d94 2023-01-10 thomas struct got_object_id old_id, new_id;
413 62ee7d94 2023-01-10 thomas struct got_object_id *id = NULL;
414 62ee7d94 2023-01-10 thomas char *refname = NULL;
415 62ee7d94 2023-01-10 thomas size_t datalen;
416 62ee7d94 2023-01-10 thomas int locked = 0;
417 8a9c582b 2023-06-22 thomas char hex1[SHA1_DIGEST_STRING_LENGTH];
418 8a9c582b 2023-06-22 thomas char hex2[SHA1_DIGEST_STRING_LENGTH];
420 62ee7d94 2023-01-10 thomas log_debug("update-ref from uid %d", client->euid);
422 62ee7d94 2023-01-10 thomas if (client->nref_updates <= 0)
423 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
425 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
426 62ee7d94 2023-01-10 thomas if (datalen < sizeof(iref))
427 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
428 62ee7d94 2023-01-10 thomas memcpy(&iref, imsg->data, sizeof(iref));
429 62ee7d94 2023-01-10 thomas if (datalen != sizeof(iref) + iref.name_len)
430 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
431 fcbb06bf 2023-01-14 thomas refname = strndup(imsg->data + sizeof(iref), iref.name_len);
432 62ee7d94 2023-01-10 thomas if (refname == NULL)
433 fcbb06bf 2023-01-14 thomas return got_error_from_errno("strndup");
435 62ee7d94 2023-01-10 thomas log_debug("updating ref %s for uid %d", refname, client->euid);
437 62ee7d94 2023-01-10 thomas memcpy(old_id.sha1, iref.old_id, SHA1_DIGEST_LENGTH);
438 62ee7d94 2023-01-10 thomas memcpy(new_id.sha1, iref.new_id, SHA1_DIGEST_LENGTH);
439 44f875ad 2024-01-18 thomas err = got_repo_find_object_id(iref.delete_ref ? &old_id : &new_id,
442 62ee7d94 2023-01-10 thomas goto done;
444 62ee7d94 2023-01-10 thomas if (iref.ref_is_new) {
445 62ee7d94 2023-01-10 thomas err = got_ref_open(&ref, repo, refname, 0);
446 62ee7d94 2023-01-10 thomas if (err) {
447 62ee7d94 2023-01-10 thomas if (err->code != GOT_ERR_NOT_REF)
448 62ee7d94 2023-01-10 thomas goto done;
449 62ee7d94 2023-01-10 thomas err = got_ref_alloc(&ref, refname, &new_id);
451 62ee7d94 2023-01-10 thomas goto done;
452 62ee7d94 2023-01-10 thomas err = got_ref_write(ref, repo); /* will lock/unlock */
454 62ee7d94 2023-01-10 thomas goto done;
456 8a9c582b 2023-06-22 thomas err = got_ref_resolve(&id, repo, ref);
458 8a9c582b 2023-06-22 thomas goto done;
459 8a9c582b 2023-06-22 thomas got_object_id_hex(&new_id, hex1, sizeof(hex1));
460 8a9c582b 2023-06-22 thomas got_object_id_hex(id, hex2, sizeof(hex2));
461 62ee7d94 2023-01-10 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
462 8a9c582b 2023-06-22 thomas "Addition %s: %s failed; %s: %s has been "
463 8a9c582b 2023-06-22 thomas "created by someone else while transaction "
464 8a9c582b 2023-06-22 thomas "was in progress",
465 8a9c582b 2023-06-22 thomas got_ref_get_name(ref), hex1,
466 8a9c582b 2023-06-22 thomas got_ref_get_name(ref), hex2);
467 62ee7d94 2023-01-10 thomas goto done;
469 49563dfb 2023-01-28 thomas } else if (iref.delete_ref) {
470 49563dfb 2023-01-28 thomas err = got_ref_open(&ref, repo, refname, 1 /* lock */);
472 49563dfb 2023-01-28 thomas goto done;
473 49563dfb 2023-01-28 thomas locked = 1;
475 49563dfb 2023-01-28 thomas err = got_ref_resolve(&id, repo, ref);
477 49563dfb 2023-01-28 thomas goto done;
479 49563dfb 2023-01-28 thomas if (got_object_id_cmp(id, &old_id) != 0) {
480 8a9c582b 2023-06-22 thomas got_object_id_hex(&old_id, hex1, sizeof(hex1));
481 8a9c582b 2023-06-22 thomas got_object_id_hex(id, hex2, sizeof(hex2));
482 49563dfb 2023-01-28 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
483 8a9c582b 2023-06-22 thomas "Deletion %s: %s failed; %s: %s has been "
484 8a9c582b 2023-06-22 thomas "created by someone else while transaction "
485 8a9c582b 2023-06-22 thomas "was in progress",
486 8a9c582b 2023-06-22 thomas got_ref_get_name(ref), hex1,
487 8a9c582b 2023-06-22 thomas got_ref_get_name(ref), hex2);
488 49563dfb 2023-01-28 thomas goto done;
491 49563dfb 2023-01-28 thomas err = got_ref_delete(ref, repo);
493 49563dfb 2023-01-28 thomas goto done;
495 49563dfb 2023-01-28 thomas free(id);
496 49563dfb 2023-01-28 thomas id = NULL;
498 62ee7d94 2023-01-10 thomas err = got_ref_open(&ref, repo, refname, 1 /* lock */);
500 62ee7d94 2023-01-10 thomas goto done;
501 62ee7d94 2023-01-10 thomas locked = 1;
503 62ee7d94 2023-01-10 thomas err = got_ref_resolve(&id, repo, ref);
505 62ee7d94 2023-01-10 thomas goto done;
507 62ee7d94 2023-01-10 thomas if (got_object_id_cmp(id, &old_id) != 0) {
508 8a9c582b 2023-06-22 thomas got_object_id_hex(&old_id, hex1, sizeof(hex1));
509 8a9c582b 2023-06-22 thomas got_object_id_hex(id, hex2, sizeof(hex2));
510 62ee7d94 2023-01-10 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
511 8a9c582b 2023-06-22 thomas "Update %s: %s failed; %s: %s has been "
512 8a9c582b 2023-06-22 thomas "created by someone else while transaction "
513 8a9c582b 2023-06-22 thomas "was in progress",
514 8a9c582b 2023-06-22 thomas got_ref_get_name(ref), hex1,
515 8a9c582b 2023-06-22 thomas got_ref_get_name(ref), hex2);
516 62ee7d94 2023-01-10 thomas goto done;
519 169def41 2023-06-22 thomas if (got_object_id_cmp(&new_id, &old_id) != 0) {
520 169def41 2023-06-22 thomas err = got_ref_change_ref(ref, &new_id);
522 169def41 2023-06-22 thomas goto done;
524 169def41 2023-06-22 thomas err = got_ref_write(ref, repo);
526 169def41 2023-06-22 thomas goto done;
529 62ee7d94 2023-01-10 thomas free(id);
530 62ee7d94 2023-01-10 thomas id = NULL;
533 62ee7d94 2023-01-10 thomas if (err) {
534 62ee7d94 2023-01-10 thomas if (err->code == GOT_ERR_LOCKFILE_TIMEOUT) {
535 62ee7d94 2023-01-10 thomas err = got_error_fmt(GOT_ERR_LOCKFILE_TIMEOUT,
536 62ee7d94 2023-01-10 thomas "could not acquire exclusive file lock for %s",
537 62ee7d94 2023-01-10 thomas refname);
539 62ee7d94 2023-01-10 thomas send_ref_update_ng(client, &iref, refname, err->msg);
541 62ee7d94 2023-01-10 thomas send_ref_update_ok(client, &iref, refname);
543 62ee7d94 2023-01-10 thomas if (client->nref_updates > 0) {
544 62ee7d94 2023-01-10 thomas client->nref_updates--;
545 d98779cd 2023-01-19 thomas if (client->nref_updates == 0) {
546 62ee7d94 2023-01-10 thomas send_refs_updated(client);
547 c8b73ac1 2023-08-23 thomas client->flush_disconnect = 1;
551 62ee7d94 2023-01-10 thomas if (locked) {
552 62ee7d94 2023-01-10 thomas const struct got_error *unlock_err;
553 62ee7d94 2023-01-10 thomas unlock_err = got_ref_unlock(ref);
554 62ee7d94 2023-01-10 thomas if (unlock_err && err == NULL)
555 62ee7d94 2023-01-10 thomas err = unlock_err;
558 62ee7d94 2023-01-10 thomas got_ref_close(ref);
559 62ee7d94 2023-01-10 thomas free(refname);
560 62ee7d94 2023-01-10 thomas free(id);
561 62ee7d94 2023-01-10 thomas return err;
564 62ee7d94 2023-01-10 thomas static void
565 62ee7d94 2023-01-10 thomas session_dispatch_repo_child(int fd, short event, void *arg)
567 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = arg;
568 62ee7d94 2023-01-10 thomas struct imsgbuf *ibuf = &iev->ibuf;
569 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
570 62ee7d94 2023-01-10 thomas ssize_t n;
571 62ee7d94 2023-01-10 thomas int shut = 0;
572 62ee7d94 2023-01-10 thomas struct imsg imsg;
574 62ee7d94 2023-01-10 thomas if (event & EV_READ) {
575 62ee7d94 2023-01-10 thomas if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
576 62ee7d94 2023-01-10 thomas fatal("imsg_read error");
577 62ee7d94 2023-01-10 thomas if (n == 0) {
578 62ee7d94 2023-01-10 thomas /* Connection closed. */
579 62ee7d94 2023-01-10 thomas shut = 1;
580 62ee7d94 2023-01-10 thomas goto done;
584 62ee7d94 2023-01-10 thomas if (event & EV_WRITE) {
585 62ee7d94 2023-01-10 thomas n = msgbuf_write(&ibuf->w);
586 62ee7d94 2023-01-10 thomas if (n == -1 && errno != EAGAIN)
587 62ee7d94 2023-01-10 thomas fatal("msgbuf_write");
588 62ee7d94 2023-01-10 thomas if (n == 0) {
589 62ee7d94 2023-01-10 thomas /* Connection closed. */
590 62ee7d94 2023-01-10 thomas shut = 1;
591 62ee7d94 2023-01-10 thomas goto done;
595 62ee7d94 2023-01-10 thomas for (;;) {
596 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
597 62ee7d94 2023-01-10 thomas uint32_t client_id = 0;
598 62ee7d94 2023-01-10 thomas int do_disconnect = 0;
599 62ee7d94 2023-01-10 thomas int do_ref_updates = 0, do_ref_update = 0;
600 62ee7d94 2023-01-10 thomas int do_packfile_install = 0;
602 62ee7d94 2023-01-10 thomas if ((n = imsg_get(ibuf, &imsg)) == -1)
603 62ee7d94 2023-01-10 thomas fatal("%s: imsg_get error", __func__);
604 62ee7d94 2023-01-10 thomas if (n == 0) /* No more messages. */
607 62ee7d94 2023-01-10 thomas switch (imsg.hdr.type) {
608 62ee7d94 2023-01-10 thomas case GOTD_IMSG_ERROR:
609 62ee7d94 2023-01-10 thomas do_disconnect = 1;
610 62ee7d94 2023-01-10 thomas err = gotd_imsg_recv_error(&client_id, &imsg);
612 62ee7d94 2023-01-10 thomas case GOTD_IMSG_PACKFILE_DONE:
613 62ee7d94 2023-01-10 thomas do_disconnect = 1;
614 62ee7d94 2023-01-10 thomas err = recv_packfile_done(&client_id, &imsg);
616 62ee7d94 2023-01-10 thomas case GOTD_IMSG_PACKFILE_INSTALL:
617 62ee7d94 2023-01-10 thomas err = recv_packfile_install(&client_id, &imsg);
618 62ee7d94 2023-01-10 thomas if (err == NULL)
619 62ee7d94 2023-01-10 thomas do_packfile_install = 1;
621 62ee7d94 2023-01-10 thomas case GOTD_IMSG_REF_UPDATES_START:
622 62ee7d94 2023-01-10 thomas err = recv_ref_updates_start(&client_id, &imsg);
623 62ee7d94 2023-01-10 thomas if (err == NULL)
624 62ee7d94 2023-01-10 thomas do_ref_updates = 1;
626 62ee7d94 2023-01-10 thomas case GOTD_IMSG_REF_UPDATE:
627 62ee7d94 2023-01-10 thomas err = recv_ref_update(&client_id, &imsg);
628 62ee7d94 2023-01-10 thomas if (err == NULL)
629 62ee7d94 2023-01-10 thomas do_ref_update = 1;
632 62ee7d94 2023-01-10 thomas log_debug("unexpected imsg %d", imsg.hdr.type);
636 62ee7d94 2023-01-10 thomas if (do_disconnect) {
638 62ee7d94 2023-01-10 thomas disconnect_on_error(client, err);
640 62ee7d94 2023-01-10 thomas disconnect(client);
642 62ee7d94 2023-01-10 thomas if (do_packfile_install)
643 62ee7d94 2023-01-10 thomas err = install_pack(client,
644 62ee7d94 2023-01-10 thomas gotd_session.repo->path, &imsg);
645 62ee7d94 2023-01-10 thomas else if (do_ref_updates)
646 62ee7d94 2023-01-10 thomas err = begin_ref_updates(client, &imsg);
647 62ee7d94 2023-01-10 thomas else if (do_ref_update)
648 d98779cd 2023-01-19 thomas err = update_ref(&shut, client,
649 62ee7d94 2023-01-10 thomas gotd_session.repo->path, &imsg);
651 62ee7d94 2023-01-10 thomas log_warnx("uid %d: %s", client->euid, err->msg);
653 62ee7d94 2023-01-10 thomas imsg_free(&imsg);
656 62ee7d94 2023-01-10 thomas if (!shut) {
657 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(iev);
659 62ee7d94 2023-01-10 thomas /* This pipe is dead. Remove its event handler */
660 62ee7d94 2023-01-10 thomas event_del(&iev->ev);
661 62ee7d94 2023-01-10 thomas event_loopexit(NULL);
665 62ee7d94 2023-01-10 thomas static const struct got_error *
666 62ee7d94 2023-01-10 thomas recv_capabilities(struct gotd_session_client *client, struct imsg *imsg)
668 62ee7d94 2023-01-10 thomas struct gotd_imsg_capabilities icapas;
669 62ee7d94 2023-01-10 thomas size_t datalen;
671 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
672 62ee7d94 2023-01-10 thomas if (datalen != sizeof(icapas))
673 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
674 62ee7d94 2023-01-10 thomas memcpy(&icapas, imsg->data, sizeof(icapas));
676 62ee7d94 2023-01-10 thomas client->ncapa_alloc = icapas.ncapabilities;
677 62ee7d94 2023-01-10 thomas client->capabilities = calloc(client->ncapa_alloc,
678 62ee7d94 2023-01-10 thomas sizeof(*client->capabilities));
679 62ee7d94 2023-01-10 thomas if (client->capabilities == NULL) {
680 62ee7d94 2023-01-10 thomas client->ncapa_alloc = 0;
681 62ee7d94 2023-01-10 thomas return got_error_from_errno("calloc");
684 62ee7d94 2023-01-10 thomas log_debug("expecting %zu capabilities from uid %d",
685 62ee7d94 2023-01-10 thomas client->ncapa_alloc, client->euid);
686 62ee7d94 2023-01-10 thomas return NULL;
689 62ee7d94 2023-01-10 thomas static const struct got_error *
690 62ee7d94 2023-01-10 thomas recv_capability(struct gotd_session_client *client, struct imsg *imsg)
692 62ee7d94 2023-01-10 thomas struct gotd_imsg_capability icapa;
693 62ee7d94 2023-01-10 thomas struct gotd_client_capability *capa;
694 62ee7d94 2023-01-10 thomas size_t datalen;
695 62ee7d94 2023-01-10 thomas char *key, *value = NULL;
697 62ee7d94 2023-01-10 thomas if (client->capabilities == NULL ||
698 62ee7d94 2023-01-10 thomas client->ncapabilities >= client->ncapa_alloc) {
699 62ee7d94 2023-01-10 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
700 62ee7d94 2023-01-10 thomas "unexpected capability received");
703 62ee7d94 2023-01-10 thomas memset(&icapa, 0, sizeof(icapa));
705 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
706 62ee7d94 2023-01-10 thomas if (datalen < sizeof(icapa))
707 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
708 62ee7d94 2023-01-10 thomas memcpy(&icapa, imsg->data, sizeof(icapa));
710 62ee7d94 2023-01-10 thomas if (datalen != sizeof(icapa) + icapa.key_len + icapa.value_len)
711 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
713 fcbb06bf 2023-01-14 thomas key = strndup(imsg->data + sizeof(icapa), icapa.key_len);
714 62ee7d94 2023-01-10 thomas if (key == NULL)
715 fcbb06bf 2023-01-14 thomas return got_error_from_errno("strndup");
716 62ee7d94 2023-01-10 thomas if (icapa.value_len > 0) {
717 fcbb06bf 2023-01-14 thomas value = strndup(imsg->data + sizeof(icapa) + icapa.key_len,
718 fcbb06bf 2023-01-14 thomas icapa.value_len);
719 62ee7d94 2023-01-10 thomas if (value == NULL) {
720 62ee7d94 2023-01-10 thomas free(key);
721 fcbb06bf 2023-01-14 thomas return got_error_from_errno("strndup");
725 62ee7d94 2023-01-10 thomas capa = &client->capabilities[client->ncapabilities++];
726 62ee7d94 2023-01-10 thomas capa->key = key;
727 62ee7d94 2023-01-10 thomas capa->value = value;
729 62ee7d94 2023-01-10 thomas if (value)
730 62ee7d94 2023-01-10 thomas log_debug("uid %d: capability %s=%s", client->euid, key, value);
732 62ee7d94 2023-01-10 thomas log_debug("uid %d: capability %s", client->euid, key);
734 62ee7d94 2023-01-10 thomas return NULL;
737 62ee7d94 2023-01-10 thomas static const struct got_error *
738 62ee7d94 2023-01-10 thomas ensure_client_is_reading(struct gotd_session_client *client)
740 62ee7d94 2023-01-10 thomas if (client->is_writing) {
741 62ee7d94 2023-01-10 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
742 62ee7d94 2023-01-10 thomas "uid %d made a read-request but is not reading from "
743 62ee7d94 2023-01-10 thomas "a repository", client->euid);
746 62ee7d94 2023-01-10 thomas return NULL;
749 62ee7d94 2023-01-10 thomas static const struct got_error *
750 62ee7d94 2023-01-10 thomas ensure_client_is_writing(struct gotd_session_client *client)
752 62ee7d94 2023-01-10 thomas if (!client->is_writing) {
753 62ee7d94 2023-01-10 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
754 62ee7d94 2023-01-10 thomas "uid %d made a write-request but is not writing to "
755 62ee7d94 2023-01-10 thomas "a repository", client->euid);
758 62ee7d94 2023-01-10 thomas return NULL;
761 62ee7d94 2023-01-10 thomas static const struct got_error *
762 62ee7d94 2023-01-10 thomas forward_want(struct gotd_session_client *client, struct imsg *imsg)
764 62ee7d94 2023-01-10 thomas struct gotd_imsg_want ireq;
765 62ee7d94 2023-01-10 thomas struct gotd_imsg_want iwant;
766 62ee7d94 2023-01-10 thomas size_t datalen;
768 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
769 62ee7d94 2023-01-10 thomas if (datalen != sizeof(ireq))
770 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
772 62ee7d94 2023-01-10 thomas memcpy(&ireq, imsg->data, datalen);
774 62ee7d94 2023-01-10 thomas memset(&iwant, 0, sizeof(iwant));
775 62ee7d94 2023-01-10 thomas memcpy(iwant.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
776 62ee7d94 2023-01-10 thomas iwant.client_id = client->id;
778 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev, GOTD_IMSG_WANT,
779 7fed8fa4 2023-06-22 thomas gotd_session.proc_id, -1, &iwant, sizeof(iwant)) == -1)
780 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg compose WANT");
782 62ee7d94 2023-01-10 thomas return NULL;
785 62ee7d94 2023-01-10 thomas static const struct got_error *
786 62ee7d94 2023-01-10 thomas forward_ref_update(struct gotd_session_client *client, struct imsg *imsg)
788 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
789 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update ireq;
790 62ee7d94 2023-01-10 thomas struct gotd_imsg_ref_update *iref = NULL;
791 62ee7d94 2023-01-10 thomas size_t datalen;
793 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
794 62ee7d94 2023-01-10 thomas if (datalen < sizeof(ireq))
795 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
796 62ee7d94 2023-01-10 thomas memcpy(&ireq, imsg->data, sizeof(ireq));
797 62ee7d94 2023-01-10 thomas if (datalen != sizeof(ireq) + ireq.name_len)
798 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
800 62ee7d94 2023-01-10 thomas iref = malloc(datalen);
801 62ee7d94 2023-01-10 thomas if (iref == NULL)
802 62ee7d94 2023-01-10 thomas return got_error_from_errno("malloc");
803 62ee7d94 2023-01-10 thomas memcpy(iref, imsg->data, datalen);
805 62ee7d94 2023-01-10 thomas iref->client_id = client->id;
806 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
807 7fed8fa4 2023-06-22 thomas GOTD_IMSG_REF_UPDATE, gotd_session.proc_id, -1,
808 7fed8fa4 2023-06-22 thomas iref, datalen) == -1)
809 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose REF_UPDATE");
810 62ee7d94 2023-01-10 thomas free(iref);
811 62ee7d94 2023-01-10 thomas return err;
814 62ee7d94 2023-01-10 thomas static const struct got_error *
815 62ee7d94 2023-01-10 thomas forward_have(struct gotd_session_client *client, struct imsg *imsg)
817 62ee7d94 2023-01-10 thomas struct gotd_imsg_have ireq;
818 62ee7d94 2023-01-10 thomas struct gotd_imsg_have ihave;
819 62ee7d94 2023-01-10 thomas size_t datalen;
821 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
822 62ee7d94 2023-01-10 thomas if (datalen != sizeof(ireq))
823 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
825 62ee7d94 2023-01-10 thomas memcpy(&ireq, imsg->data, datalen);
827 62ee7d94 2023-01-10 thomas memset(&ihave, 0, sizeof(ihave));
828 62ee7d94 2023-01-10 thomas memcpy(ihave.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
829 62ee7d94 2023-01-10 thomas ihave.client_id = client->id;
831 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev, GOTD_IMSG_HAVE,
832 7fed8fa4 2023-06-22 thomas gotd_session.proc_id, -1, &ihave, sizeof(ihave)) == -1)
833 62ee7d94 2023-01-10 thomas return got_error_from_errno("imsg compose HAVE");
835 62ee7d94 2023-01-10 thomas return NULL;
838 62ee7d94 2023-01-10 thomas static int
839 62ee7d94 2023-01-10 thomas client_has_capability(struct gotd_session_client *client, const char *capastr)
841 62ee7d94 2023-01-10 thomas struct gotd_client_capability *capa;
842 62ee7d94 2023-01-10 thomas size_t i;
844 62ee7d94 2023-01-10 thomas if (client->ncapabilities == 0)
845 62ee7d94 2023-01-10 thomas return 0;
847 62ee7d94 2023-01-10 thomas for (i = 0; i < client->ncapabilities; i++) {
848 62ee7d94 2023-01-10 thomas capa = &client->capabilities[i];
849 62ee7d94 2023-01-10 thomas if (strcmp(capa->key, capastr) == 0)
850 62ee7d94 2023-01-10 thomas return 1;
853 62ee7d94 2023-01-10 thomas return 0;
856 62ee7d94 2023-01-10 thomas static const struct got_error *
857 62ee7d94 2023-01-10 thomas recv_packfile(struct gotd_session_client *client)
859 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
860 62ee7d94 2023-01-10 thomas struct gotd_imsg_recv_packfile ipack;
861 62ee7d94 2023-01-10 thomas struct gotd_imsg_packfile_pipe ipipe;
862 62ee7d94 2023-01-10 thomas struct gotd_imsg_packidx_file ifile;
863 62ee7d94 2023-01-10 thomas char *basepath = NULL, *pack_path = NULL, *idx_path = NULL;
864 62ee7d94 2023-01-10 thomas int packfd = -1, idxfd = -1;
865 62ee7d94 2023-01-10 thomas int pipe[2] = { -1, -1 };
867 62ee7d94 2023-01-10 thomas if (client->packfile_path) {
868 62ee7d94 2023-01-10 thomas return got_error_fmt(GOT_ERR_PRIVSEP_MSG,
869 62ee7d94 2023-01-10 thomas "uid %d already has a pack file", client->euid);
872 62ee7d94 2023-01-10 thomas if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
873 62ee7d94 2023-01-10 thomas return got_error_from_errno("socketpair");
875 62ee7d94 2023-01-10 thomas memset(&ipipe, 0, sizeof(ipipe));
876 62ee7d94 2023-01-10 thomas ipipe.client_id = client->id;
878 62ee7d94 2023-01-10 thomas /* Send pack pipe end 0 to repo child process. */
879 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
880 7fed8fa4 2023-06-22 thomas GOTD_IMSG_PACKFILE_PIPE, gotd_session.proc_id, pipe[0],
881 62ee7d94 2023-01-10 thomas &ipipe, sizeof(ipipe)) == -1) {
882 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
883 62ee7d94 2023-01-10 thomas pipe[0] = -1;
884 62ee7d94 2023-01-10 thomas goto done;
886 62ee7d94 2023-01-10 thomas pipe[0] = -1;
888 62ee7d94 2023-01-10 thomas /* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
889 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->iev,
890 7fed8fa4 2023-06-22 thomas GOTD_IMSG_PACKFILE_PIPE, gotd_session.proc_id, pipe[1],
891 7fed8fa4 2023-06-22 thomas NULL, 0) == -1)
892 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
893 62ee7d94 2023-01-10 thomas pipe[1] = -1;
895 62ee7d94 2023-01-10 thomas if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.pack",
896 62ee7d94 2023-01-10 thomas got_repo_get_path(gotd_session.repo), GOT_OBJECTS_PACK_DIR,
897 62ee7d94 2023-01-10 thomas client->euid) == -1) {
898 62ee7d94 2023-01-10 thomas err = got_error_from_errno("asprintf");
899 62ee7d94 2023-01-10 thomas goto done;
902 62ee7d94 2023-01-10 thomas err = got_opentemp_named_fd(&pack_path, &packfd, basepath, "");
904 62ee7d94 2023-01-10 thomas goto done;
905 851a5b48 2023-02-03 thomas if (fchmod(packfd, GOT_DEFAULT_PACK_MODE) == -1) {
906 851a5b48 2023-02-03 thomas err = got_error_from_errno2("fchmod", pack_path);
907 851a5b48 2023-02-03 thomas goto done;
910 62ee7d94 2023-01-10 thomas free(basepath);
911 62ee7d94 2023-01-10 thomas if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.idx",
912 62ee7d94 2023-01-10 thomas got_repo_get_path(gotd_session.repo), GOT_OBJECTS_PACK_DIR,
913 62ee7d94 2023-01-10 thomas client->euid) == -1) {
914 62ee7d94 2023-01-10 thomas err = got_error_from_errno("asprintf");
915 62ee7d94 2023-01-10 thomas basepath = NULL;
916 62ee7d94 2023-01-10 thomas goto done;
918 62ee7d94 2023-01-10 thomas err = got_opentemp_named_fd(&idx_path, &idxfd, basepath, "");
920 62ee7d94 2023-01-10 thomas goto done;
921 851a5b48 2023-02-03 thomas if (fchmod(idxfd, GOT_DEFAULT_PACK_MODE) == -1) {
922 851a5b48 2023-02-03 thomas err = got_error_from_errno2("fchmod", idx_path);
923 851a5b48 2023-02-03 thomas goto done;
926 62ee7d94 2023-01-10 thomas memset(&ifile, 0, sizeof(ifile));
927 62ee7d94 2023-01-10 thomas ifile.client_id = client->id;
928 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
929 7fed8fa4 2023-06-22 thomas GOTD_IMSG_PACKIDX_FILE, gotd_session.proc_id,
930 62ee7d94 2023-01-10 thomas idxfd, &ifile, sizeof(ifile)) == -1) {
931 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose PACKIDX_FILE");
932 62ee7d94 2023-01-10 thomas idxfd = -1;
933 62ee7d94 2023-01-10 thomas goto done;
935 62ee7d94 2023-01-10 thomas idxfd = -1;
937 62ee7d94 2023-01-10 thomas memset(&ipack, 0, sizeof(ipack));
938 62ee7d94 2023-01-10 thomas ipack.client_id = client->id;
939 62ee7d94 2023-01-10 thomas if (client_has_capability(client, GOT_CAPA_REPORT_STATUS))
940 62ee7d94 2023-01-10 thomas ipack.report_status = 1;
942 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
943 7fed8fa4 2023-06-22 thomas GOTD_IMSG_RECV_PACKFILE, gotd_session.proc_id, packfd,
944 62ee7d94 2023-01-10 thomas &ipack, sizeof(ipack)) == -1) {
945 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose RECV_PACKFILE");
946 62ee7d94 2023-01-10 thomas packfd = -1;
947 62ee7d94 2023-01-10 thomas goto done;
949 62ee7d94 2023-01-10 thomas packfd = -1;
952 62ee7d94 2023-01-10 thomas free(basepath);
953 62ee7d94 2023-01-10 thomas if (pipe[0] != -1 && close(pipe[0]) == -1 && err == NULL)
954 62ee7d94 2023-01-10 thomas err = got_error_from_errno("close");
955 62ee7d94 2023-01-10 thomas if (pipe[1] != -1 && close(pipe[1]) == -1 && err == NULL)
956 62ee7d94 2023-01-10 thomas err = got_error_from_errno("close");
957 62ee7d94 2023-01-10 thomas if (packfd != -1 && close(packfd) == -1 && err == NULL)
958 62ee7d94 2023-01-10 thomas err = got_error_from_errno("close");
959 62ee7d94 2023-01-10 thomas if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
960 62ee7d94 2023-01-10 thomas err = got_error_from_errno("close");
961 62ee7d94 2023-01-10 thomas if (err) {
962 62ee7d94 2023-01-10 thomas free(pack_path);
963 62ee7d94 2023-01-10 thomas free(idx_path);
965 62ee7d94 2023-01-10 thomas client->packfile_path = pack_path;
966 62ee7d94 2023-01-10 thomas client->packidx_path = idx_path;
968 62ee7d94 2023-01-10 thomas return err;
971 62ee7d94 2023-01-10 thomas static const struct got_error *
972 62ee7d94 2023-01-10 thomas send_packfile(struct gotd_session_client *client)
974 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
975 62ee7d94 2023-01-10 thomas struct gotd_imsg_send_packfile ipack;
976 62ee7d94 2023-01-10 thomas struct gotd_imsg_packfile_pipe ipipe;
977 62ee7d94 2023-01-10 thomas int pipe[2];
979 62ee7d94 2023-01-10 thomas if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
980 62ee7d94 2023-01-10 thomas return got_error_from_errno("socketpair");
982 62ee7d94 2023-01-10 thomas memset(&ipack, 0, sizeof(ipack));
983 62ee7d94 2023-01-10 thomas memset(&ipipe, 0, sizeof(ipipe));
985 62ee7d94 2023-01-10 thomas ipack.client_id = client->id;
986 62ee7d94 2023-01-10 thomas if (client_has_capability(client, GOT_CAPA_SIDE_BAND_64K))
987 62ee7d94 2023-01-10 thomas ipack.report_progress = 1;
989 62ee7d94 2023-01-10 thomas client->delta_cache_fd = got_opentempfd();
990 62ee7d94 2023-01-10 thomas if (client->delta_cache_fd == -1)
991 62ee7d94 2023-01-10 thomas return got_error_from_errno("got_opentempfd");
993 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
994 62ee7d94 2023-01-10 thomas GOTD_IMSG_SEND_PACKFILE, PROC_GOTD, client->delta_cache_fd,
995 62ee7d94 2023-01-10 thomas &ipack, sizeof(ipack)) == -1) {
996 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose SEND_PACKFILE");
997 62ee7d94 2023-01-10 thomas close(pipe[0]);
998 62ee7d94 2023-01-10 thomas close(pipe[1]);
999 62ee7d94 2023-01-10 thomas return err;
1002 62ee7d94 2023-01-10 thomas ipipe.client_id = client->id;
1004 62ee7d94 2023-01-10 thomas /* Send pack pipe end 0 to repo child process. */
1005 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->repo_child_iev,
1006 62ee7d94 2023-01-10 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD,
1007 62ee7d94 2023-01-10 thomas pipe[0], &ipipe, sizeof(ipipe)) == -1) {
1008 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
1009 62ee7d94 2023-01-10 thomas close(pipe[1]);
1010 62ee7d94 2023-01-10 thomas return err;
1013 62ee7d94 2023-01-10 thomas /* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
1014 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&client->iev,
1015 62ee7d94 2023-01-10 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1], NULL, 0) == -1)
1016 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
1018 62ee7d94 2023-01-10 thomas return err;
1021 62ee7d94 2023-01-10 thomas static void
1022 8cb46987 2023-02-07 thomas session_dispatch_client(int fd, short events, void *arg)
1024 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = arg;
1025 62ee7d94 2023-01-10 thomas struct imsgbuf *ibuf = &iev->ibuf;
1026 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
1027 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
1028 62ee7d94 2023-01-10 thomas struct imsg imsg;
1029 62ee7d94 2023-01-10 thomas ssize_t n;
1031 62ee7d94 2023-01-10 thomas if (events & EV_WRITE) {
1032 62ee7d94 2023-01-10 thomas while (ibuf->w.queued) {
1033 62ee7d94 2023-01-10 thomas n = msgbuf_write(&ibuf->w);
1034 62ee7d94 2023-01-10 thomas if (n == -1 && errno == EPIPE) {
1036 62ee7d94 2023-01-10 thomas * The client has closed its socket.
1037 62ee7d94 2023-01-10 thomas * This can happen when Git clients are
1038 62ee7d94 2023-01-10 thomas * done sending pack file data.
1040 62ee7d94 2023-01-10 thomas msgbuf_clear(&ibuf->w);
1041 62ee7d94 2023-01-10 thomas continue;
1042 62ee7d94 2023-01-10 thomas } else if (n == -1 && errno != EAGAIN) {
1043 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg_flush");
1044 62ee7d94 2023-01-10 thomas disconnect_on_error(client, err);
1047 62ee7d94 2023-01-10 thomas if (n == 0) {
1048 62ee7d94 2023-01-10 thomas /* Connection closed. */
1049 62ee7d94 2023-01-10 thomas err = got_error(GOT_ERR_EOF);
1050 62ee7d94 2023-01-10 thomas disconnect_on_error(client, err);
1055 c8b73ac1 2023-08-23 thomas if (client->flush_disconnect) {
1056 c8b73ac1 2023-08-23 thomas disconnect(client);
1061 62ee7d94 2023-01-10 thomas if ((events & EV_READ) == 0)
1064 62ee7d94 2023-01-10 thomas memset(&imsg, 0, sizeof(imsg));
1066 62ee7d94 2023-01-10 thomas while (err == NULL) {
1067 62ee7d94 2023-01-10 thomas err = gotd_imsg_recv(&imsg, ibuf, 0);
1068 62ee7d94 2023-01-10 thomas if (err) {
1069 62ee7d94 2023-01-10 thomas if (err->code == GOT_ERR_PRIVSEP_READ)
1070 62ee7d94 2023-01-10 thomas err = NULL;
1071 8e92c55c 2023-06-08 thomas else if (err->code == GOT_ERR_EOF &&
1072 8e92c55c 2023-06-08 thomas client->state == GOTD_STATE_EXPECT_CAPABILITIES) {
1074 8e92c55c 2023-06-08 thomas * The client has closed its socket before
1075 8e92c55c 2023-06-08 thomas * sending its capability announcement.
1076 8e92c55c 2023-06-08 thomas * This can happen when Git clients have
1077 8e92c55c 2023-06-08 thomas * no ref-updates to send.
1079 8e92c55c 2023-06-08 thomas disconnect_on_error(client, err);
1085 62ee7d94 2023-01-10 thomas evtimer_del(&client->tmo);
1087 62ee7d94 2023-01-10 thomas switch (imsg.hdr.type) {
1088 62ee7d94 2023-01-10 thomas case GOTD_IMSG_CAPABILITIES:
1089 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1090 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1091 62ee7d94 2023-01-10 thomas "unexpected capabilities received");
1094 62ee7d94 2023-01-10 thomas log_debug("receiving capabilities from uid %d",
1095 62ee7d94 2023-01-10 thomas client->euid);
1096 62ee7d94 2023-01-10 thomas err = recv_capabilities(client, &imsg);
1098 62ee7d94 2023-01-10 thomas case GOTD_IMSG_CAPABILITY:
1099 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1100 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1101 62ee7d94 2023-01-10 thomas "unexpected capability received");
1104 62ee7d94 2023-01-10 thomas err = recv_capability(client, &imsg);
1105 62ee7d94 2023-01-10 thomas if (err || client->ncapabilities < client->ncapa_alloc)
1107 62ee7d94 2023-01-10 thomas if (!client->is_writing) {
1108 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_WANT;
1109 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1110 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting want-lines",
1111 62ee7d94 2023-01-10 thomas client->euid);
1112 62ee7d94 2023-01-10 thomas } else if (client->is_writing) {
1113 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_REF_UPDATE;
1114 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1115 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting ref-update-lines",
1116 62ee7d94 2023-01-10 thomas client->euid);
1118 62ee7d94 2023-01-10 thomas fatalx("client %d is both reading and writing",
1119 62ee7d94 2023-01-10 thomas client->euid);
1121 62ee7d94 2023-01-10 thomas case GOTD_IMSG_WANT:
1122 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_WANT) {
1123 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1124 62ee7d94 2023-01-10 thomas "unexpected want-line received");
1127 62ee7d94 2023-01-10 thomas log_debug("received want-line from uid %d",
1128 62ee7d94 2023-01-10 thomas client->euid);
1129 62ee7d94 2023-01-10 thomas err = ensure_client_is_reading(client);
1130 62ee7d94 2023-01-10 thomas if (err)
1132 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1133 62ee7d94 2023-01-10 thomas err = forward_want(client, &imsg);
1135 62ee7d94 2023-01-10 thomas case GOTD_IMSG_REF_UPDATE:
1136 0445d8ec 2023-01-19 thomas if (client->state != GOTD_STATE_EXPECT_REF_UPDATE &&
1137 0445d8ec 2023-01-19 thomas client->state !=
1138 0445d8ec 2023-01-19 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1139 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1140 62ee7d94 2023-01-10 thomas "unexpected ref-update-line received");
1143 62ee7d94 2023-01-10 thomas log_debug("received ref-update-line from uid %d",
1144 62ee7d94 2023-01-10 thomas client->euid);
1145 62ee7d94 2023-01-10 thomas err = ensure_client_is_writing(client);
1146 62ee7d94 2023-01-10 thomas if (err)
1148 62ee7d94 2023-01-10 thomas err = forward_ref_update(client, &imsg);
1149 62ee7d94 2023-01-10 thomas if (err)
1151 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_MORE_REF_UPDATES;
1152 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1154 62ee7d94 2023-01-10 thomas case GOTD_IMSG_HAVE:
1155 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_HAVE) {
1156 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1157 62ee7d94 2023-01-10 thomas "unexpected have-line received");
1160 62ee7d94 2023-01-10 thomas log_debug("received have-line from uid %d",
1161 62ee7d94 2023-01-10 thomas client->euid);
1162 62ee7d94 2023-01-10 thomas err = ensure_client_is_reading(client);
1163 62ee7d94 2023-01-10 thomas if (err)
1165 62ee7d94 2023-01-10 thomas err = forward_have(client, &imsg);
1166 62ee7d94 2023-01-10 thomas if (err)
1168 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1170 62ee7d94 2023-01-10 thomas case GOTD_IMSG_FLUSH:
1171 62ee7d94 2023-01-10 thomas if (client->state == GOTD_STATE_EXPECT_WANT ||
1172 62ee7d94 2023-01-10 thomas client->state == GOTD_STATE_EXPECT_HAVE) {
1173 62ee7d94 2023-01-10 thomas err = ensure_client_is_reading(client);
1174 62ee7d94 2023-01-10 thomas if (err)
1176 62ee7d94 2023-01-10 thomas } else if (client->state ==
1177 62ee7d94 2023-01-10 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1178 62ee7d94 2023-01-10 thomas err = ensure_client_is_writing(client);
1179 62ee7d94 2023-01-10 thomas if (err)
1181 6110f5ef 2023-01-19 thomas } else if (client->state != GOTD_STATE_EXPECT_DONE) {
1182 98c7fd82 2023-01-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1183 98c7fd82 2023-01-23 thomas "unexpected flush-pkt received");
1186 98c7fd82 2023-01-23 thomas if (!client->accept_flush_pkt) {
1187 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1188 62ee7d94 2023-01-10 thomas "unexpected flush-pkt received");
1193 98c7fd82 2023-01-23 thomas * Accept just one flush packet at a time.
1194 98c7fd82 2023-01-23 thomas * Future client state transitions will set this flag
1195 98c7fd82 2023-01-23 thomas * again if another flush packet is expected.
1197 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 0;
1199 62ee7d94 2023-01-10 thomas log_debug("received flush-pkt from uid %d",
1200 62ee7d94 2023-01-10 thomas client->euid);
1201 62ee7d94 2023-01-10 thomas if (client->state == GOTD_STATE_EXPECT_WANT) {
1202 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_HAVE;
1203 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting have-lines",
1204 62ee7d94 2023-01-10 thomas client->euid);
1205 62ee7d94 2023-01-10 thomas } else if (client->state == GOTD_STATE_EXPECT_HAVE) {
1206 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_DONE;
1207 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1208 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting 'done'",
1209 62ee7d94 2023-01-10 thomas client->euid);
1210 62ee7d94 2023-01-10 thomas } else if (client->state ==
1211 62ee7d94 2023-01-10 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1212 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_PACKFILE;
1213 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting packfile",
1214 62ee7d94 2023-01-10 thomas client->euid);
1215 62ee7d94 2023-01-10 thomas err = recv_packfile(client);
1216 6110f5ef 2023-01-19 thomas } else if (client->state != GOTD_STATE_EXPECT_DONE) {
1217 62ee7d94 2023-01-10 thomas /* should not happen, see above */
1218 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1219 62ee7d94 2023-01-10 thomas "unexpected client state");
1223 62ee7d94 2023-01-10 thomas case GOTD_IMSG_DONE:
1224 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_HAVE &&
1225 62ee7d94 2023-01-10 thomas client->state != GOTD_STATE_EXPECT_DONE) {
1226 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1227 62ee7d94 2023-01-10 thomas "unexpected flush-pkt received");
1230 62ee7d94 2023-01-10 thomas log_debug("received 'done' from uid %d", client->euid);
1231 62ee7d94 2023-01-10 thomas err = ensure_client_is_reading(client);
1232 62ee7d94 2023-01-10 thomas if (err)
1234 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_DONE;
1235 98c7fd82 2023-01-23 thomas client->accept_flush_pkt = 1;
1236 62ee7d94 2023-01-10 thomas err = send_packfile(client);
1238 62ee7d94 2023-01-10 thomas default:
1239 62ee7d94 2023-01-10 thomas log_debug("unexpected imsg %d", imsg.hdr.type);
1240 62ee7d94 2023-01-10 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
1244 62ee7d94 2023-01-10 thomas imsg_free(&imsg);
1247 62ee7d94 2023-01-10 thomas if (err) {
1248 62ee7d94 2023-01-10 thomas if (err->code != GOT_ERR_EOF ||
1249 62ee7d94 2023-01-10 thomas client->state != GOTD_STATE_EXPECT_PACKFILE)
1250 62ee7d94 2023-01-10 thomas disconnect_on_error(client, err);
1251 62ee7d94 2023-01-10 thomas } else {
1252 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(iev);
1253 62ee7d94 2023-01-10 thomas evtimer_add(&client->tmo, &gotd_session.request_timeout);
1257 62ee7d94 2023-01-10 thomas static const struct got_error *
1258 62ee7d94 2023-01-10 thomas list_refs_request(void)
1260 62ee7d94 2023-01-10 thomas static const struct got_error *err;
1261 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
1262 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = &client->repo_child_iev;
1263 62ee7d94 2023-01-10 thomas struct gotd_imsg_list_refs_internal ilref;
1266 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1267 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1269 62ee7d94 2023-01-10 thomas memset(&ilref, 0, sizeof(ilref));
1270 62ee7d94 2023-01-10 thomas ilref.client_id = client->id;
1272 62ee7d94 2023-01-10 thomas fd = dup(client->fd);
1273 62ee7d94 2023-01-10 thomas if (fd == -1)
1274 62ee7d94 2023-01-10 thomas return got_error_from_errno("dup");
1276 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(iev, GOTD_IMSG_LIST_REFS_INTERNAL,
1277 7fed8fa4 2023-06-22 thomas gotd_session.proc_id, fd, &ilref, sizeof(ilref)) == -1) {
1278 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose LIST_REFS_INTERNAL");
1279 62ee7d94 2023-01-10 thomas close(fd);
1280 62ee7d94 2023-01-10 thomas return err;
1283 62ee7d94 2023-01-10 thomas client->state = GOTD_STATE_EXPECT_CAPABILITIES;
1284 62ee7d94 2023-01-10 thomas log_debug("uid %d: expecting capabilities", client->euid);
1285 62ee7d94 2023-01-10 thomas return NULL;
1288 62ee7d94 2023-01-10 thomas static const struct got_error *
1289 62ee7d94 2023-01-10 thomas recv_connect(struct imsg *imsg)
1291 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
1292 62ee7d94 2023-01-10 thomas struct gotd_imsg_connect iconnect;
1293 62ee7d94 2023-01-10 thomas size_t datalen;
1295 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1296 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1298 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1299 62ee7d94 2023-01-10 thomas if (datalen != sizeof(iconnect))
1300 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1301 62ee7d94 2023-01-10 thomas memcpy(&iconnect, imsg->data, sizeof(iconnect));
1303 62ee7d94 2023-01-10 thomas client->euid = iconnect.euid;
1304 62ee7d94 2023-01-10 thomas client->egid = iconnect.egid;
1305 3d97effa 2024-01-31 thomas client->fd = imsg_get_fd(imsg);
1306 3d97effa 2024-01-31 thomas if (client->fd == -1)
1307 3d97effa 2024-01-31 thomas return got_error(GOT_ERR_PRIVSEP_NO_FD);
1309 62ee7d94 2023-01-10 thomas imsg_init(&client->iev.ibuf, client->fd);
1310 8cb46987 2023-02-07 thomas client->iev.handler = session_dispatch_client;
1311 62ee7d94 2023-01-10 thomas client->iev.events = EV_READ;
1312 62ee7d94 2023-01-10 thomas client->iev.handler_arg = NULL;
1313 62ee7d94 2023-01-10 thomas event_set(&client->iev.ev, client->iev.ibuf.fd, EV_READ,
1314 8cb46987 2023-02-07 thomas session_dispatch_client, &client->iev);
1315 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(&client->iev);
1316 62ee7d94 2023-01-10 thomas evtimer_set(&client->tmo, gotd_request_timeout, client);
1318 62ee7d94 2023-01-10 thomas return NULL;
1321 62ee7d94 2023-01-10 thomas static const struct got_error *
1322 62ee7d94 2023-01-10 thomas recv_repo_child(struct imsg *imsg)
1324 62ee7d94 2023-01-10 thomas struct gotd_imsg_connect_repo_child ichild;
1325 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
1326 62ee7d94 2023-01-10 thomas size_t datalen;
1329 62ee7d94 2023-01-10 thomas if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1330 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1332 62ee7d94 2023-01-10 thomas /* We should already have received a pipe to the listener. */
1333 62ee7d94 2023-01-10 thomas if (client->fd == -1)
1334 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1336 62ee7d94 2023-01-10 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1337 62ee7d94 2023-01-10 thomas if (datalen != sizeof(ichild))
1338 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1340 62ee7d94 2023-01-10 thomas memcpy(&ichild, imsg->data, sizeof(ichild));
1342 62ee7d94 2023-01-10 thomas client->id = ichild.client_id;
1343 62ee7d94 2023-01-10 thomas if (ichild.proc_id == PROC_REPO_WRITE)
1344 62ee7d94 2023-01-10 thomas client->is_writing = 1;
1345 62ee7d94 2023-01-10 thomas else if (ichild.proc_id == PROC_REPO_READ)
1346 62ee7d94 2023-01-10 thomas client->is_writing = 0;
1348 62ee7d94 2023-01-10 thomas return got_error_msg(GOT_ERR_PRIVSEP_MSG,
1349 62ee7d94 2023-01-10 thomas "bad child process type");
1351 3d97effa 2024-01-31 thomas fd = imsg_get_fd(imsg);
1352 3d97effa 2024-01-31 thomas if (fd == -1)
1353 62ee7d94 2023-01-10 thomas return got_error(GOT_ERR_PRIVSEP_NO_FD);
1355 3d97effa 2024-01-31 thomas imsg_init(&client->repo_child_iev.ibuf, fd);
1356 62ee7d94 2023-01-10 thomas client->repo_child_iev.handler = session_dispatch_repo_child;
1357 62ee7d94 2023-01-10 thomas client->repo_child_iev.events = EV_READ;
1358 62ee7d94 2023-01-10 thomas client->repo_child_iev.handler_arg = NULL;
1359 62ee7d94 2023-01-10 thomas event_set(&client->repo_child_iev.ev, client->repo_child_iev.ibuf.fd,
1360 62ee7d94 2023-01-10 thomas EV_READ, session_dispatch_repo_child, &client->repo_child_iev);
1361 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(&client->repo_child_iev);
1363 62ee7d94 2023-01-10 thomas /* The "recvfd" pledge promise is no longer needed. */
1364 62ee7d94 2023-01-10 thomas if (pledge("stdio rpath wpath cpath sendfd fattr flock", NULL) == -1)
1365 62ee7d94 2023-01-10 thomas fatal("pledge");
1367 62ee7d94 2023-01-10 thomas return NULL;
1370 62ee7d94 2023-01-10 thomas static void
1371 62ee7d94 2023-01-10 thomas session_dispatch(int fd, short event, void *arg)
1373 62ee7d94 2023-01-10 thomas struct gotd_imsgev *iev = arg;
1374 62ee7d94 2023-01-10 thomas struct imsgbuf *ibuf = &iev->ibuf;
1375 62ee7d94 2023-01-10 thomas struct gotd_session_client *client = &gotd_session_client;
1376 62ee7d94 2023-01-10 thomas ssize_t n;
1377 62ee7d94 2023-01-10 thomas int shut = 0;
1378 62ee7d94 2023-01-10 thomas struct imsg imsg;
1380 62ee7d94 2023-01-10 thomas if (event & EV_READ) {
1381 62ee7d94 2023-01-10 thomas if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1382 62ee7d94 2023-01-10 thomas fatal("imsg_read error");
1383 62ee7d94 2023-01-10 thomas if (n == 0) {
1384 62ee7d94 2023-01-10 thomas /* Connection closed. */
1385 62ee7d94 2023-01-10 thomas shut = 1;
1386 62ee7d94 2023-01-10 thomas goto done;
1390 62ee7d94 2023-01-10 thomas if (event & EV_WRITE) {
1391 62ee7d94 2023-01-10 thomas n = msgbuf_write(&ibuf->w);
1392 62ee7d94 2023-01-10 thomas if (n == -1 && errno != EAGAIN)
1393 62ee7d94 2023-01-10 thomas fatal("msgbuf_write");
1394 62ee7d94 2023-01-10 thomas if (n == 0) {
1395 62ee7d94 2023-01-10 thomas /* Connection closed. */
1396 62ee7d94 2023-01-10 thomas shut = 1;
1397 62ee7d94 2023-01-10 thomas goto done;
1401 62ee7d94 2023-01-10 thomas for (;;) {
1402 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
1403 62ee7d94 2023-01-10 thomas uint32_t client_id = 0;
1404 62ee7d94 2023-01-10 thomas int do_disconnect = 0, do_list_refs = 0;
1406 62ee7d94 2023-01-10 thomas if ((n = imsg_get(ibuf, &imsg)) == -1)
1407 62ee7d94 2023-01-10 thomas fatal("%s: imsg_get error", __func__);
1408 62ee7d94 2023-01-10 thomas if (n == 0) /* No more messages. */
1411 62ee7d94 2023-01-10 thomas switch (imsg.hdr.type) {
1412 62ee7d94 2023-01-10 thomas case GOTD_IMSG_ERROR:
1413 62ee7d94 2023-01-10 thomas do_disconnect = 1;
1414 62ee7d94 2023-01-10 thomas err = gotd_imsg_recv_error(&client_id, &imsg);
1416 62ee7d94 2023-01-10 thomas case GOTD_IMSG_CONNECT:
1417 62ee7d94 2023-01-10 thomas err = recv_connect(&imsg);
1419 62ee7d94 2023-01-10 thomas case GOTD_IMSG_DISCONNECT:
1420 62ee7d94 2023-01-10 thomas do_disconnect = 1;
1422 62ee7d94 2023-01-10 thomas case GOTD_IMSG_CONNECT_REPO_CHILD:
1423 62ee7d94 2023-01-10 thomas err = recv_repo_child(&imsg);
1424 62ee7d94 2023-01-10 thomas if (err)
1426 62ee7d94 2023-01-10 thomas do_list_refs = 1;
1428 62ee7d94 2023-01-10 thomas default:
1429 62ee7d94 2023-01-10 thomas log_debug("unexpected imsg %d", imsg.hdr.type);
1432 62ee7d94 2023-01-10 thomas imsg_free(&imsg);
1434 62ee7d94 2023-01-10 thomas if (do_disconnect) {
1435 62ee7d94 2023-01-10 thomas if (err)
1436 62ee7d94 2023-01-10 thomas disconnect_on_error(client, err);
1438 62ee7d94 2023-01-10 thomas disconnect(client);
1439 62ee7d94 2023-01-10 thomas } else if (do_list_refs)
1440 62ee7d94 2023-01-10 thomas err = list_refs_request();
1442 62ee7d94 2023-01-10 thomas if (err)
1443 62ee7d94 2023-01-10 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1446 62ee7d94 2023-01-10 thomas if (!shut) {
1447 62ee7d94 2023-01-10 thomas gotd_imsg_event_add(iev);
1448 62ee7d94 2023-01-10 thomas } else {
1449 62ee7d94 2023-01-10 thomas /* This pipe is dead. Remove its event handler */
1450 62ee7d94 2023-01-10 thomas event_del(&iev->ev);
1451 62ee7d94 2023-01-10 thomas event_loopexit(NULL);
1456 62ee7d94 2023-01-10 thomas session_main(const char *title, const char *repo_path,
1457 7fed8fa4 2023-06-22 thomas int *pack_fds, int *temp_fds, struct timeval *request_timeout,
1458 7fed8fa4 2023-06-22 thomas enum gotd_procid proc_id)
1460 62ee7d94 2023-01-10 thomas const struct got_error *err = NULL;
1461 62ee7d94 2023-01-10 thomas struct event evsigint, evsigterm, evsighup, evsigusr1;
1463 62ee7d94 2023-01-10 thomas gotd_session.title = title;
1464 62ee7d94 2023-01-10 thomas gotd_session.pid = getpid();
1465 62ee7d94 2023-01-10 thomas gotd_session.pack_fds = pack_fds;
1466 62ee7d94 2023-01-10 thomas gotd_session.temp_fds = temp_fds;
1467 62ee7d94 2023-01-10 thomas memcpy(&gotd_session.request_timeout, request_timeout,
1468 62ee7d94 2023-01-10 thomas sizeof(gotd_session.request_timeout));
1469 7fed8fa4 2023-06-22 thomas gotd_session.proc_id = proc_id;
1471 62ee7d94 2023-01-10 thomas err = got_repo_open(&gotd_session.repo, repo_path, NULL, pack_fds);
1472 62ee7d94 2023-01-10 thomas if (err)
1473 62ee7d94 2023-01-10 thomas goto done;
1474 62ee7d94 2023-01-10 thomas if (!got_repo_is_bare(gotd_session.repo)) {
1475 62ee7d94 2023-01-10 thomas err = got_error_msg(GOT_ERR_NOT_GIT_REPO,
1476 62ee7d94 2023-01-10 thomas "bare git repository required");
1477 62ee7d94 2023-01-10 thomas goto done;
1480 62ee7d94 2023-01-10 thomas got_repo_temp_fds_set(gotd_session.repo, temp_fds);
1482 62ee7d94 2023-01-10 thomas signal_set(&evsigint, SIGINT, gotd_session_sighdlr, NULL);
1483 62ee7d94 2023-01-10 thomas signal_set(&evsigterm, SIGTERM, gotd_session_sighdlr, NULL);
1484 62ee7d94 2023-01-10 thomas signal_set(&evsighup, SIGHUP, gotd_session_sighdlr, NULL);
1485 62ee7d94 2023-01-10 thomas signal_set(&evsigusr1, SIGUSR1, gotd_session_sighdlr, NULL);
1486 62ee7d94 2023-01-10 thomas signal(SIGPIPE, SIG_IGN);
1488 62ee7d94 2023-01-10 thomas signal_add(&evsigint, NULL);
1489 62ee7d94 2023-01-10 thomas signal_add(&evsigterm, NULL);
1490 62ee7d94 2023-01-10 thomas signal_add(&evsighup, NULL);
1491 62ee7d94 2023-01-10 thomas signal_add(&evsigusr1, NULL);
1493 62ee7d94 2023-01-10 thomas gotd_session_client.state = GOTD_STATE_EXPECT_LIST_REFS;
1494 62ee7d94 2023-01-10 thomas gotd_session_client.fd = -1;
1495 62ee7d94 2023-01-10 thomas gotd_session_client.nref_updates = -1;
1496 a6f25078 2023-01-10 thomas gotd_session_client.delta_cache_fd = -1;
1497 98c7fd82 2023-01-23 thomas gotd_session_client.accept_flush_pkt = 1;
1499 62ee7d94 2023-01-10 thomas imsg_init(&gotd_session.parent_iev.ibuf, GOTD_FILENO_MSG_PIPE);
1500 62ee7d94 2023-01-10 thomas gotd_session.parent_iev.handler = session_dispatch;
1501 62ee7d94 2023-01-10 thomas gotd_session.parent_iev.events = EV_READ;
1502 62ee7d94 2023-01-10 thomas gotd_session.parent_iev.handler_arg = NULL;
1503 62ee7d94 2023-01-10 thomas event_set(&gotd_session.parent_iev.ev, gotd_session.parent_iev.ibuf.fd,
1504 62ee7d94 2023-01-10 thomas EV_READ, session_dispatch, &gotd_session.parent_iev);
1505 62ee7d94 2023-01-10 thomas if (gotd_imsg_compose_event(&gotd_session.parent_iev,
1506 7fed8fa4 2023-06-22 thomas GOTD_IMSG_CLIENT_SESSION_READY, gotd_session.proc_id,
1507 7fed8fa4 2023-06-22 thomas -1, NULL, 0) == -1) {
1508 62ee7d94 2023-01-10 thomas err = got_error_from_errno("imsg compose CLIENT_SESSION_READY");
1509 62ee7d94 2023-01-10 thomas goto done;
1512 62ee7d94 2023-01-10 thomas event_dispatch();
1514 62ee7d94 2023-01-10 thomas if (err)
1515 62ee7d94 2023-01-10 thomas log_warnx("%s: %s", title, err->msg);
1516 62ee7d94 2023-01-10 thomas gotd_session_shutdown();
1520 62ee7d94 2023-01-10 thomas gotd_session_shutdown(void)
1522 5330ab76 2023-02-17 thomas log_debug("shutting down");
1523 62ee7d94 2023-01-10 thomas if (gotd_session.repo)
1524 62ee7d94 2023-01-10 thomas got_repo_close(gotd_session.repo);
1525 62ee7d94 2023-01-10 thomas got_repo_pack_fds_close(gotd_session.pack_fds);
1526 62ee7d94 2023-01-10 thomas got_repo_temp_fds_close(gotd_session.temp_fds);
1527 62ee7d94 2023-01-10 thomas exit(0);
