2 ae7c1b78 2023-01-10 stsp * Copyright (c) 2022, 2023 Stefan Sperling <stsp@openbsd.org>
4 ae7c1b78 2023-01-10 stsp * Permission to use, copy, modify, and distribute this software for any
5 ae7c1b78 2023-01-10 stsp * purpose with or without fee is hereby granted, provided that the above
6 ae7c1b78 2023-01-10 stsp * copyright notice and this permission notice appear in all copies.
8 ae7c1b78 2023-01-10 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 ae7c1b78 2023-01-10 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 ae7c1b78 2023-01-10 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 ae7c1b78 2023-01-10 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 ae7c1b78 2023-01-10 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 ae7c1b78 2023-01-10 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 ae7c1b78 2023-01-10 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 ae7c1b78 2023-01-10 stsp #include <sys/types.h>
18 ae7c1b78 2023-01-10 stsp #include <sys/queue.h>
19 ae7c1b78 2023-01-10 stsp #include <sys/tree.h>
20 ae7c1b78 2023-01-10 stsp #include <sys/socket.h>
21 ae7c1b78 2023-01-10 stsp #include <sys/uio.h>
23 ae7c1b78 2023-01-10 stsp #include <errno.h>
24 ae7c1b78 2023-01-10 stsp #include <event.h>
25 ae7c1b78 2023-01-10 stsp #include <limits.h>
26 ae7c1b78 2023-01-10 stsp #include <sha1.h>
27 ae7c1b78 2023-01-10 stsp #include <signal.h>
28 ae7c1b78 2023-01-10 stsp #include <stdint.h>
29 ae7c1b78 2023-01-10 stsp #include <stdio.h>
30 ae7c1b78 2023-01-10 stsp #include <stdlib.h>
31 ae7c1b78 2023-01-10 stsp #include <string.h>
32 ae7c1b78 2023-01-10 stsp #include <imsg.h>
33 ae7c1b78 2023-01-10 stsp #include <unistd.h>
35 ae7c1b78 2023-01-10 stsp #include "got_error.h"
36 ae7c1b78 2023-01-10 stsp #include "got_repository.h"
37 ae7c1b78 2023-01-10 stsp #include "got_object.h"
38 ae7c1b78 2023-01-10 stsp #include "got_path.h"
39 ae7c1b78 2023-01-10 stsp #include "got_reference.h"
40 ae7c1b78 2023-01-10 stsp #include "got_opentemp.h"
42 ae7c1b78 2023-01-10 stsp #include "got_lib_sha1.h"
43 ae7c1b78 2023-01-10 stsp #include "got_lib_delta.h"
44 ae7c1b78 2023-01-10 stsp #include "got_lib_object.h"
45 ae7c1b78 2023-01-10 stsp #include "got_lib_object_cache.h"
46 ae7c1b78 2023-01-10 stsp #include "got_lib_pack.h"
47 ae7c1b78 2023-01-10 stsp #include "got_lib_repository.h"
48 ae7c1b78 2023-01-10 stsp #include "got_lib_gitproto.h"
50 ae7c1b78 2023-01-10 stsp #include "gotd.h"
51 ae7c1b78 2023-01-10 stsp #include "log.h"
52 ae7c1b78 2023-01-10 stsp #include "session.h"
55 ae7c1b78 2023-01-10 stsp static struct gotd_session {
57 ae7c1b78 2023-01-10 stsp const char *title;
58 ae7c1b78 2023-01-10 stsp struct got_repository *repo;
59 ae7c1b78 2023-01-10 stsp int *pack_fds;
60 ae7c1b78 2023-01-10 stsp int *temp_fds;
61 ae7c1b78 2023-01-10 stsp struct gotd_imsgev parent_iev;
62 ae7c1b78 2023-01-10 stsp struct timeval request_timeout;
63 ae7c1b78 2023-01-10 stsp } gotd_session;
65 ae7c1b78 2023-01-10 stsp static struct gotd_session_client {
66 eac23c30 2023-01-10 stsp enum gotd_session_state state;
67 ae7c1b78 2023-01-10 stsp int is_writing;
68 ae7c1b78 2023-01-10 stsp struct gotd_client_capability *capabilities;
69 ae7c1b78 2023-01-10 stsp size_t ncapa_alloc;
70 ae7c1b78 2023-01-10 stsp size_t ncapabilities;
71 ae7c1b78 2023-01-10 stsp uint32_t id;
73 ae7c1b78 2023-01-10 stsp int delta_cache_fd;
74 ae7c1b78 2023-01-10 stsp struct gotd_imsgev iev;
75 ae7c1b78 2023-01-10 stsp struct gotd_imsgev repo_child_iev;
76 ae7c1b78 2023-01-10 stsp struct event tmo;
79 ae7c1b78 2023-01-10 stsp char *packfile_path;
80 ae7c1b78 2023-01-10 stsp char *packidx_path;
81 ae7c1b78 2023-01-10 stsp int nref_updates;
82 3448a19a 2023-01-21 stsp int accept_flush_pkt;
83 ae7c1b78 2023-01-10 stsp } gotd_session_client;
85 ae7c1b78 2023-01-10 stsp void gotd_session_sighdlr(int sig, short event, void *arg);
86 ae7c1b78 2023-01-10 stsp static void gotd_session_shutdown(void);
89 ae7c1b78 2023-01-10 stsp disconnect(struct gotd_session_client *client)
91 ae7c1b78 2023-01-10 stsp log_debug("uid %d: disconnecting", client->euid);
93 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&gotd_session.parent_iev,
94 ae7c1b78 2023-01-10 stsp GOTD_IMSG_DISCONNECT, PROC_SESSION, -1, NULL, 0) == -1)
95 ae7c1b78 2023-01-10 stsp log_warn("imsg compose DISCONNECT");
97 ae7c1b78 2023-01-10 stsp imsg_clear(&client->repo_child_iev.ibuf);
98 ae7c1b78 2023-01-10 stsp event_del(&client->repo_child_iev.ev);
99 ae7c1b78 2023-01-10 stsp evtimer_del(&client->tmo);
100 ae7c1b78 2023-01-10 stsp close(client->fd);
101 ae7c1b78 2023-01-10 stsp if (client->delta_cache_fd != -1)
102 ae7c1b78 2023-01-10 stsp close(client->delta_cache_fd);
103 ae7c1b78 2023-01-10 stsp if (client->packfile_path) {
104 ae7c1b78 2023-01-10 stsp if (unlink(client->packfile_path) == -1 && errno != ENOENT)
105 ae7c1b78 2023-01-10 stsp log_warn("unlink %s: ", client->packfile_path);
106 ae7c1b78 2023-01-10 stsp free(client->packfile_path);
108 ae7c1b78 2023-01-10 stsp if (client->packidx_path) {
109 ae7c1b78 2023-01-10 stsp if (unlink(client->packidx_path) == -1 && errno != ENOENT)
110 ae7c1b78 2023-01-10 stsp log_warn("unlink %s: ", client->packidx_path);
111 ae7c1b78 2023-01-10 stsp free(client->packidx_path);
113 ae7c1b78 2023-01-10 stsp free(client->capabilities);
115 ae7c1b78 2023-01-10 stsp gotd_session_shutdown();
118 ae7c1b78 2023-01-10 stsp static void
119 ae7c1b78 2023-01-10 stsp disconnect_on_error(struct gotd_session_client *client,
120 ae7c1b78 2023-01-10 stsp const struct got_error *err)
122 ae7c1b78 2023-01-10 stsp struct imsgbuf ibuf;
124 ae7c1b78 2023-01-10 stsp log_warnx("uid %d: %s", client->euid, err->msg);
125 ae7c1b78 2023-01-10 stsp if (err->code != GOT_ERR_EOF) {
126 ae7c1b78 2023-01-10 stsp imsg_init(&ibuf, client->fd);
127 ae7c1b78 2023-01-10 stsp gotd_imsg_send_error(&ibuf, 0, PROC_SESSION, err);
128 ae7c1b78 2023-01-10 stsp imsg_clear(&ibuf);
131 ae7c1b78 2023-01-10 stsp disconnect(client);
134 ae7c1b78 2023-01-10 stsp static void
135 ae7c1b78 2023-01-10 stsp gotd_request_timeout(int fd, short events, void *arg)
137 ae7c1b78 2023-01-10 stsp struct gotd_session_client *client = arg;
139 ae7c1b78 2023-01-10 stsp log_debug("disconnecting uid %d due to timeout", client->euid);
140 ae7c1b78 2023-01-10 stsp disconnect(client);
144 ae7c1b78 2023-01-10 stsp gotd_session_sighdlr(int sig, short event, void *arg)
147 ae7c1b78 2023-01-10 stsp * Normal signal handler rules don't apply because libevent
148 ae7c1b78 2023-01-10 stsp * decouples for us.
151 ae7c1b78 2023-01-10 stsp switch (sig) {
152 ae7c1b78 2023-01-10 stsp case SIGHUP:
153 ae7c1b78 2023-01-10 stsp log_info("%s: ignoring SIGHUP", __func__);
155 ae7c1b78 2023-01-10 stsp case SIGUSR1:
156 ae7c1b78 2023-01-10 stsp log_info("%s: ignoring SIGUSR1", __func__);
158 ae7c1b78 2023-01-10 stsp case SIGTERM:
159 ae7c1b78 2023-01-10 stsp case SIGINT:
160 ae7c1b78 2023-01-10 stsp gotd_session_shutdown();
161 ae7c1b78 2023-01-10 stsp /* NOTREACHED */
164 ae7c1b78 2023-01-10 stsp fatalx("unexpected signal");
168 ae7c1b78 2023-01-10 stsp static const struct got_error *
169 ae7c1b78 2023-01-10 stsp recv_packfile_done(uint32_t *client_id, struct imsg *imsg)
171 ae7c1b78 2023-01-10 stsp struct gotd_imsg_packfile_done idone;
172 ae7c1b78 2023-01-10 stsp size_t datalen;
174 ae7c1b78 2023-01-10 stsp log_debug("packfile-done received");
176 ae7c1b78 2023-01-10 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
177 ae7c1b78 2023-01-10 stsp if (datalen != sizeof(idone))
178 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
179 ae7c1b78 2023-01-10 stsp memcpy(&idone, imsg->data, sizeof(idone));
181 ae7c1b78 2023-01-10 stsp *client_id = idone.client_id;
182 ae7c1b78 2023-01-10 stsp return NULL;
185 ae7c1b78 2023-01-10 stsp static const struct got_error *
186 ae7c1b78 2023-01-10 stsp recv_packfile_install(uint32_t *client_id, struct imsg *imsg)
188 ae7c1b78 2023-01-10 stsp struct gotd_imsg_packfile_install inst;
189 ae7c1b78 2023-01-10 stsp size_t datalen;
191 ae7c1b78 2023-01-10 stsp log_debug("packfile-install received");
193 ae7c1b78 2023-01-10 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
194 ae7c1b78 2023-01-10 stsp if (datalen != sizeof(inst))
195 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
196 ae7c1b78 2023-01-10 stsp memcpy(&inst, imsg->data, sizeof(inst));
198 ae7c1b78 2023-01-10 stsp *client_id = inst.client_id;
199 ae7c1b78 2023-01-10 stsp return NULL;
202 ae7c1b78 2023-01-10 stsp static const struct got_error *
203 ae7c1b78 2023-01-10 stsp recv_ref_updates_start(uint32_t *client_id, struct imsg *imsg)
205 ae7c1b78 2023-01-10 stsp struct gotd_imsg_ref_updates_start istart;
206 ae7c1b78 2023-01-10 stsp size_t datalen;
208 ae7c1b78 2023-01-10 stsp log_debug("ref-updates-start received");
210 ae7c1b78 2023-01-10 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
211 ae7c1b78 2023-01-10 stsp if (datalen != sizeof(istart))
212 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
213 ae7c1b78 2023-01-10 stsp memcpy(&istart, imsg->data, sizeof(istart));
215 ae7c1b78 2023-01-10 stsp *client_id = istart.client_id;
216 ae7c1b78 2023-01-10 stsp return NULL;
219 ae7c1b78 2023-01-10 stsp static const struct got_error *
220 ae7c1b78 2023-01-10 stsp recv_ref_update(uint32_t *client_id, struct imsg *imsg)
222 ae7c1b78 2023-01-10 stsp struct gotd_imsg_ref_update iref;
223 ae7c1b78 2023-01-10 stsp size_t datalen;
225 ae7c1b78 2023-01-10 stsp log_debug("ref-update received");
227 ae7c1b78 2023-01-10 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
228 ae7c1b78 2023-01-10 stsp if (datalen < sizeof(iref))
229 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
230 ae7c1b78 2023-01-10 stsp memcpy(&iref, imsg->data, sizeof(iref));
232 ae7c1b78 2023-01-10 stsp *client_id = iref.client_id;
233 ae7c1b78 2023-01-10 stsp return NULL;
236 ae7c1b78 2023-01-10 stsp static const struct got_error *
237 ae7c1b78 2023-01-10 stsp send_ref_update_ok(struct gotd_session_client *client,
238 ae7c1b78 2023-01-10 stsp struct gotd_imsg_ref_update *iref, const char *refname)
240 ae7c1b78 2023-01-10 stsp struct gotd_imsg_ref_update_ok iok;
241 ae7c1b78 2023-01-10 stsp struct gotd_imsgev *iev = &client->iev;
242 ae7c1b78 2023-01-10 stsp struct ibuf *wbuf;
243 ae7c1b78 2023-01-10 stsp size_t len;
245 ae7c1b78 2023-01-10 stsp memset(&iok, 0, sizeof(iok));
246 ae7c1b78 2023-01-10 stsp iok.client_id = client->id;
247 ae7c1b78 2023-01-10 stsp memcpy(iok.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
248 ae7c1b78 2023-01-10 stsp memcpy(iok.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
249 ae7c1b78 2023-01-10 stsp iok.name_len = strlen(refname);
251 ae7c1b78 2023-01-10 stsp len = sizeof(iok) + iok.name_len;
252 ae7c1b78 2023-01-10 stsp wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_REF_UPDATE_OK,
253 ae7c1b78 2023-01-10 stsp PROC_SESSION, gotd_session.pid, len);
254 ae7c1b78 2023-01-10 stsp if (wbuf == NULL)
255 ae7c1b78 2023-01-10 stsp return got_error_from_errno("imsg_create REF_UPDATE_OK");
257 ae7c1b78 2023-01-10 stsp if (imsg_add(wbuf, &iok, sizeof(iok)) == -1)
258 ae7c1b78 2023-01-10 stsp return got_error_from_errno("imsg_add REF_UPDATE_OK");
259 ae7c1b78 2023-01-10 stsp if (imsg_add(wbuf, refname, iok.name_len) == -1)
260 ae7c1b78 2023-01-10 stsp return got_error_from_errno("imsg_add REF_UPDATE_OK");
262 ae7c1b78 2023-01-10 stsp wbuf->fd = -1;
263 ae7c1b78 2023-01-10 stsp imsg_close(&iev->ibuf, wbuf);
264 ae7c1b78 2023-01-10 stsp gotd_imsg_event_add(iev);
265 ae7c1b78 2023-01-10 stsp return NULL;
268 ae7c1b78 2023-01-10 stsp static void
269 ae7c1b78 2023-01-10 stsp send_refs_updated(struct gotd_session_client *client)
271 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&client->iev, GOTD_IMSG_REFS_UPDATED,
272 ae7c1b78 2023-01-10 stsp PROC_SESSION, -1, NULL, 0) == -1)
273 ae7c1b78 2023-01-10 stsp log_warn("imsg compose REFS_UPDATED");
276 ae7c1b78 2023-01-10 stsp static const struct got_error *
277 ae7c1b78 2023-01-10 stsp send_ref_update_ng(struct gotd_session_client *client,
278 ae7c1b78 2023-01-10 stsp struct gotd_imsg_ref_update *iref, const char *refname,
279 ae7c1b78 2023-01-10 stsp const char *reason)
281 ae7c1b78 2023-01-10 stsp const struct got_error *ng_err;
282 ae7c1b78 2023-01-10 stsp struct gotd_imsg_ref_update_ng ing;
283 ae7c1b78 2023-01-10 stsp struct gotd_imsgev *iev = &client->iev;
284 ae7c1b78 2023-01-10 stsp struct ibuf *wbuf;
285 ae7c1b78 2023-01-10 stsp size_t len;
287 ae7c1b78 2023-01-10 stsp memset(&ing, 0, sizeof(ing));
288 ae7c1b78 2023-01-10 stsp ing.client_id = client->id;
289 ae7c1b78 2023-01-10 stsp memcpy(ing.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
290 ae7c1b78 2023-01-10 stsp memcpy(ing.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
291 ae7c1b78 2023-01-10 stsp ing.name_len = strlen(refname);
293 ae7c1b78 2023-01-10 stsp ng_err = got_error_fmt(GOT_ERR_REF_BUSY, "%s", reason);
294 ae7c1b78 2023-01-10 stsp ing.reason_len = strlen(ng_err->msg);
296 ae7c1b78 2023-01-10 stsp len = sizeof(ing) + ing.name_len + ing.reason_len;
297 ae7c1b78 2023-01-10 stsp wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_REF_UPDATE_NG,
298 ae7c1b78 2023-01-10 stsp PROC_SESSION, gotd_session.pid, len);
299 ae7c1b78 2023-01-10 stsp if (wbuf == NULL)
300 ae7c1b78 2023-01-10 stsp return got_error_from_errno("imsg_create REF_UPDATE_NG");
302 ae7c1b78 2023-01-10 stsp if (imsg_add(wbuf, &ing, sizeof(ing)) == -1)
303 ae7c1b78 2023-01-10 stsp return got_error_from_errno("imsg_add REF_UPDATE_NG");
304 ae7c1b78 2023-01-10 stsp if (imsg_add(wbuf, refname, ing.name_len) == -1)
305 ae7c1b78 2023-01-10 stsp return got_error_from_errno("imsg_add REF_UPDATE_NG");
306 ae7c1b78 2023-01-10 stsp if (imsg_add(wbuf, ng_err->msg, ing.reason_len) == -1)
307 ae7c1b78 2023-01-10 stsp return got_error_from_errno("imsg_add REF_UPDATE_NG");
309 ae7c1b78 2023-01-10 stsp wbuf->fd = -1;
310 ae7c1b78 2023-01-10 stsp imsg_close(&iev->ibuf, wbuf);
311 ae7c1b78 2023-01-10 stsp gotd_imsg_event_add(iev);
312 ae7c1b78 2023-01-10 stsp return NULL;
315 ae7c1b78 2023-01-10 stsp static const struct got_error *
316 ae7c1b78 2023-01-10 stsp install_pack(struct gotd_session_client *client, const char *repo_path,
317 ae7c1b78 2023-01-10 stsp struct imsg *imsg)
319 ae7c1b78 2023-01-10 stsp const struct got_error *err = NULL;
320 ae7c1b78 2023-01-10 stsp struct gotd_imsg_packfile_install inst;
321 ae7c1b78 2023-01-10 stsp char hex[SHA1_DIGEST_STRING_LENGTH];
322 ae7c1b78 2023-01-10 stsp size_t datalen;
323 ae7c1b78 2023-01-10 stsp char *packfile_path = NULL, *packidx_path = NULL;
325 ae7c1b78 2023-01-10 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
326 ae7c1b78 2023-01-10 stsp if (datalen != sizeof(inst))
327 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
328 ae7c1b78 2023-01-10 stsp memcpy(&inst, imsg->data, sizeof(inst));
330 ae7c1b78 2023-01-10 stsp if (client->packfile_path == NULL)
331 ae7c1b78 2023-01-10 stsp return got_error_msg(GOT_ERR_BAD_REQUEST,
332 ae7c1b78 2023-01-10 stsp "client has no pack file");
333 ae7c1b78 2023-01-10 stsp if (client->packidx_path == NULL)
334 ae7c1b78 2023-01-10 stsp return got_error_msg(GOT_ERR_BAD_REQUEST,
335 ae7c1b78 2023-01-10 stsp "client has no pack file index");
337 ae7c1b78 2023-01-10 stsp if (got_sha1_digest_to_str(inst.pack_sha1, hex, sizeof(hex)) == NULL)
338 ae7c1b78 2023-01-10 stsp return got_error_msg(GOT_ERR_NO_SPACE,
339 ae7c1b78 2023-01-10 stsp "could not convert pack file SHA1 to hex");
341 ae7c1b78 2023-01-10 stsp if (asprintf(&packfile_path, "/%s/%s/pack-%s.pack",
342 ae7c1b78 2023-01-10 stsp repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
343 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("asprintf");
347 ae7c1b78 2023-01-10 stsp if (asprintf(&packidx_path, "/%s/%s/pack-%s.idx",
348 ae7c1b78 2023-01-10 stsp repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
349 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("asprintf");
353 ae7c1b78 2023-01-10 stsp if (rename(client->packfile_path, packfile_path) == -1) {
354 ae7c1b78 2023-01-10 stsp err = got_error_from_errno3("rename", client->packfile_path,
355 ae7c1b78 2023-01-10 stsp packfile_path);
359 ae7c1b78 2023-01-10 stsp free(client->packfile_path);
360 ae7c1b78 2023-01-10 stsp client->packfile_path = NULL;
362 ae7c1b78 2023-01-10 stsp if (rename(client->packidx_path, packidx_path) == -1) {
363 ae7c1b78 2023-01-10 stsp err = got_error_from_errno3("rename", client->packidx_path,
364 ae7c1b78 2023-01-10 stsp packidx_path);
368 ae7c1b78 2023-01-10 stsp free(client->packidx_path);
369 ae7c1b78 2023-01-10 stsp client->packidx_path = NULL;
371 ae7c1b78 2023-01-10 stsp free(packfile_path);
372 ae7c1b78 2023-01-10 stsp free(packidx_path);
373 ae7c1b78 2023-01-10 stsp return err;
376 ae7c1b78 2023-01-10 stsp static const struct got_error *
377 ae7c1b78 2023-01-10 stsp begin_ref_updates(struct gotd_session_client *client, struct imsg *imsg)
379 ae7c1b78 2023-01-10 stsp struct gotd_imsg_ref_updates_start istart;
380 ae7c1b78 2023-01-10 stsp size_t datalen;
382 ae7c1b78 2023-01-10 stsp if (client->nref_updates != -1)
383 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_MSG);
385 ae7c1b78 2023-01-10 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
386 ae7c1b78 2023-01-10 stsp if (datalen != sizeof(istart))
387 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
388 ae7c1b78 2023-01-10 stsp memcpy(&istart, imsg->data, sizeof(istart));
390 ae7c1b78 2023-01-10 stsp if (istart.nref_updates <= 0)
391 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_MSG);
393 ae7c1b78 2023-01-10 stsp client->nref_updates = istart.nref_updates;
394 ae7c1b78 2023-01-10 stsp return NULL;
397 ae7c1b78 2023-01-10 stsp static const struct got_error *
398 0ff2c315 2023-01-18 stsp update_ref(int *shut, struct gotd_session_client *client,
399 0ff2c315 2023-01-18 stsp const char *repo_path, struct imsg *imsg)
401 ae7c1b78 2023-01-10 stsp const struct got_error *err = NULL;
402 ae7c1b78 2023-01-10 stsp struct got_repository *repo = NULL;
403 ae7c1b78 2023-01-10 stsp struct got_reference *ref = NULL;
404 ae7c1b78 2023-01-10 stsp struct gotd_imsg_ref_update iref;
405 ae7c1b78 2023-01-10 stsp struct got_object_id old_id, new_id;
406 ae7c1b78 2023-01-10 stsp struct got_object_id *id = NULL;
407 ae7c1b78 2023-01-10 stsp struct got_object *obj = NULL;
408 ae7c1b78 2023-01-10 stsp char *refname = NULL;
409 ae7c1b78 2023-01-10 stsp size_t datalen;
410 ae7c1b78 2023-01-10 stsp int locked = 0;
412 ae7c1b78 2023-01-10 stsp log_debug("update-ref from uid %d", client->euid);
414 ae7c1b78 2023-01-10 stsp if (client->nref_updates <= 0)
415 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_MSG);
417 ae7c1b78 2023-01-10 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
418 ae7c1b78 2023-01-10 stsp if (datalen < sizeof(iref))
419 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
420 ae7c1b78 2023-01-10 stsp memcpy(&iref, imsg->data, sizeof(iref));
421 ae7c1b78 2023-01-10 stsp if (datalen != sizeof(iref) + iref.name_len)
422 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
423 00b3e9ae 2023-01-11 op refname = strndup(imsg->data + sizeof(iref), iref.name_len);
424 ae7c1b78 2023-01-10 stsp if (refname == NULL)
425 00b3e9ae 2023-01-11 op return got_error_from_errno("strndup");
427 ae7c1b78 2023-01-10 stsp log_debug("updating ref %s for uid %d", refname, client->euid);
429 ae7c1b78 2023-01-10 stsp err = got_repo_open(&repo, repo_path, NULL, NULL);
433 ae7c1b78 2023-01-10 stsp memcpy(old_id.sha1, iref.old_id, SHA1_DIGEST_LENGTH);
434 ae7c1b78 2023-01-10 stsp memcpy(new_id.sha1, iref.new_id, SHA1_DIGEST_LENGTH);
435 9a8e357c 2023-01-28 op err = got_object_open(&obj, repo,
436 9a8e357c 2023-01-28 op iref.delete_ref ? &old_id : &new_id);
440 ae7c1b78 2023-01-10 stsp if (iref.ref_is_new) {
441 ae7c1b78 2023-01-10 stsp err = got_ref_open(&ref, repo, refname, 0);
443 ae7c1b78 2023-01-10 stsp if (err->code != GOT_ERR_NOT_REF)
445 ae7c1b78 2023-01-10 stsp err = got_ref_alloc(&ref, refname, &new_id);
448 ae7c1b78 2023-01-10 stsp err = got_ref_write(ref, repo); /* will lock/unlock */
452 ae7c1b78 2023-01-10 stsp err = got_error_fmt(GOT_ERR_REF_BUSY,
453 ae7c1b78 2023-01-10 stsp "%s has been created by someone else "
454 ae7c1b78 2023-01-10 stsp "while transaction was in progress",
455 ae7c1b78 2023-01-10 stsp got_ref_get_name(ref));
458 9a8e357c 2023-01-28 op } else if (iref.delete_ref) {
459 9a8e357c 2023-01-28 op err = got_ref_open(&ref, repo, refname, 1 /* lock */);
464 9a8e357c 2023-01-28 op err = got_ref_resolve(&id, repo, ref);
468 9a8e357c 2023-01-28 op if (got_object_id_cmp(id, &old_id) != 0) {
469 9a8e357c 2023-01-28 op err = got_error_fmt(GOT_ERR_REF_BUSY,
470 9a8e357c 2023-01-28 op "%s has been modified by someone else "
471 9a8e357c 2023-01-28 op "while transaction was in progress",
472 9a8e357c 2023-01-28 op got_ref_get_name(ref));
476 9a8e357c 2023-01-28 op err = got_ref_delete(ref, repo);
483 ae7c1b78 2023-01-10 stsp err = got_ref_open(&ref, repo, refname, 1 /* lock */);
486 ae7c1b78 2023-01-10 stsp locked = 1;
488 ae7c1b78 2023-01-10 stsp err = got_ref_resolve(&id, repo, ref);
492 ae7c1b78 2023-01-10 stsp if (got_object_id_cmp(id, &old_id) != 0) {
493 ae7c1b78 2023-01-10 stsp err = got_error_fmt(GOT_ERR_REF_BUSY,
494 ae7c1b78 2023-01-10 stsp "%s has been modified by someone else "
495 ae7c1b78 2023-01-10 stsp "while transaction was in progress",
496 ae7c1b78 2023-01-10 stsp got_ref_get_name(ref));
500 ae7c1b78 2023-01-10 stsp err = got_ref_change_ref(ref, &new_id);
504 ae7c1b78 2023-01-10 stsp err = got_ref_write(ref, repo);
513 ae7c1b78 2023-01-10 stsp if (err->code == GOT_ERR_LOCKFILE_TIMEOUT) {
514 ae7c1b78 2023-01-10 stsp err = got_error_fmt(GOT_ERR_LOCKFILE_TIMEOUT,
515 ae7c1b78 2023-01-10 stsp "could not acquire exclusive file lock for %s",
518 ae7c1b78 2023-01-10 stsp send_ref_update_ng(client, &iref, refname, err->msg);
520 ae7c1b78 2023-01-10 stsp send_ref_update_ok(client, &iref, refname);
522 ae7c1b78 2023-01-10 stsp if (client->nref_updates > 0) {
523 ae7c1b78 2023-01-10 stsp client->nref_updates--;
524 0ff2c315 2023-01-18 stsp if (client->nref_updates == 0) {
525 ae7c1b78 2023-01-10 stsp send_refs_updated(client);
530 ae7c1b78 2023-01-10 stsp if (locked) {
531 ae7c1b78 2023-01-10 stsp const struct got_error *unlock_err;
532 ae7c1b78 2023-01-10 stsp unlock_err = got_ref_unlock(ref);
533 ae7c1b78 2023-01-10 stsp if (unlock_err && err == NULL)
534 ae7c1b78 2023-01-10 stsp err = unlock_err;
537 ae7c1b78 2023-01-10 stsp got_ref_close(ref);
539 ae7c1b78 2023-01-10 stsp got_object_close(obj);
541 ae7c1b78 2023-01-10 stsp got_repo_close(repo);
542 ae7c1b78 2023-01-10 stsp free(refname);
544 ae7c1b78 2023-01-10 stsp return err;
547 ae7c1b78 2023-01-10 stsp static void
548 ae7c1b78 2023-01-10 stsp session_dispatch_repo_child(int fd, short event, void *arg)
550 ae7c1b78 2023-01-10 stsp struct gotd_imsgev *iev = arg;
551 ae7c1b78 2023-01-10 stsp struct imsgbuf *ibuf = &iev->ibuf;
552 ae7c1b78 2023-01-10 stsp struct gotd_session_client *client = &gotd_session_client;
554 ae7c1b78 2023-01-10 stsp int shut = 0;
555 ae7c1b78 2023-01-10 stsp struct imsg imsg;
557 ae7c1b78 2023-01-10 stsp if (event & EV_READ) {
558 ae7c1b78 2023-01-10 stsp if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
559 ae7c1b78 2023-01-10 stsp fatal("imsg_read error");
560 ae7c1b78 2023-01-10 stsp if (n == 0) {
561 ae7c1b78 2023-01-10 stsp /* Connection closed. */
567 ae7c1b78 2023-01-10 stsp if (event & EV_WRITE) {
568 ae7c1b78 2023-01-10 stsp n = msgbuf_write(&ibuf->w);
569 ae7c1b78 2023-01-10 stsp if (n == -1 && errno != EAGAIN)
570 ae7c1b78 2023-01-10 stsp fatal("msgbuf_write");
571 ae7c1b78 2023-01-10 stsp if (n == 0) {
572 ae7c1b78 2023-01-10 stsp /* Connection closed. */
579 ae7c1b78 2023-01-10 stsp const struct got_error *err = NULL;
580 ae7c1b78 2023-01-10 stsp uint32_t client_id = 0;
581 ae7c1b78 2023-01-10 stsp int do_disconnect = 0;
582 ae7c1b78 2023-01-10 stsp int do_ref_updates = 0, do_ref_update = 0;
583 ae7c1b78 2023-01-10 stsp int do_packfile_install = 0;
585 ae7c1b78 2023-01-10 stsp if ((n = imsg_get(ibuf, &imsg)) == -1)
586 ae7c1b78 2023-01-10 stsp fatal("%s: imsg_get error", __func__);
587 ae7c1b78 2023-01-10 stsp if (n == 0) /* No more messages. */
590 ae7c1b78 2023-01-10 stsp switch (imsg.hdr.type) {
591 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_ERROR:
592 ae7c1b78 2023-01-10 stsp do_disconnect = 1;
593 ae7c1b78 2023-01-10 stsp err = gotd_imsg_recv_error(&client_id, &imsg);
595 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_PACKFILE_DONE:
596 ae7c1b78 2023-01-10 stsp do_disconnect = 1;
597 ae7c1b78 2023-01-10 stsp err = recv_packfile_done(&client_id, &imsg);
599 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_PACKFILE_INSTALL:
600 ae7c1b78 2023-01-10 stsp err = recv_packfile_install(&client_id, &imsg);
601 ae7c1b78 2023-01-10 stsp if (err == NULL)
602 ae7c1b78 2023-01-10 stsp do_packfile_install = 1;
604 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_REF_UPDATES_START:
605 ae7c1b78 2023-01-10 stsp err = recv_ref_updates_start(&client_id, &imsg);
606 ae7c1b78 2023-01-10 stsp if (err == NULL)
607 ae7c1b78 2023-01-10 stsp do_ref_updates = 1;
609 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_REF_UPDATE:
610 ae7c1b78 2023-01-10 stsp err = recv_ref_update(&client_id, &imsg);
611 ae7c1b78 2023-01-10 stsp if (err == NULL)
612 ae7c1b78 2023-01-10 stsp do_ref_update = 1;
615 ae7c1b78 2023-01-10 stsp log_debug("unexpected imsg %d", imsg.hdr.type);
619 ae7c1b78 2023-01-10 stsp if (do_disconnect) {
621 ae7c1b78 2023-01-10 stsp disconnect_on_error(client, err);
623 ae7c1b78 2023-01-10 stsp disconnect(client);
625 ae7c1b78 2023-01-10 stsp if (do_packfile_install)
626 ae7c1b78 2023-01-10 stsp err = install_pack(client,
627 ae7c1b78 2023-01-10 stsp gotd_session.repo->path, &imsg);
628 ae7c1b78 2023-01-10 stsp else if (do_ref_updates)
629 ae7c1b78 2023-01-10 stsp err = begin_ref_updates(client, &imsg);
630 ae7c1b78 2023-01-10 stsp else if (do_ref_update)
631 0ff2c315 2023-01-18 stsp err = update_ref(&shut, client,
632 ae7c1b78 2023-01-10 stsp gotd_session.repo->path, &imsg);
634 ae7c1b78 2023-01-10 stsp log_warnx("uid %d: %s", client->euid, err->msg);
636 ae7c1b78 2023-01-10 stsp imsg_free(&imsg);
639 ae7c1b78 2023-01-10 stsp if (!shut) {
640 ae7c1b78 2023-01-10 stsp gotd_imsg_event_add(iev);
642 ae7c1b78 2023-01-10 stsp /* This pipe is dead. Remove its event handler */
643 ae7c1b78 2023-01-10 stsp event_del(&iev->ev);
644 ae7c1b78 2023-01-10 stsp event_loopexit(NULL);
648 ae7c1b78 2023-01-10 stsp static const struct got_error *
649 ae7c1b78 2023-01-10 stsp recv_capabilities(struct gotd_session_client *client, struct imsg *imsg)
651 ae7c1b78 2023-01-10 stsp struct gotd_imsg_capabilities icapas;
652 ae7c1b78 2023-01-10 stsp size_t datalen;
654 ae7c1b78 2023-01-10 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
655 ae7c1b78 2023-01-10 stsp if (datalen != sizeof(icapas))
656 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
657 ae7c1b78 2023-01-10 stsp memcpy(&icapas, imsg->data, sizeof(icapas));
659 ae7c1b78 2023-01-10 stsp client->ncapa_alloc = icapas.ncapabilities;
660 ae7c1b78 2023-01-10 stsp client->capabilities = calloc(client->ncapa_alloc,
661 ae7c1b78 2023-01-10 stsp sizeof(*client->capabilities));
662 ae7c1b78 2023-01-10 stsp if (client->capabilities == NULL) {
663 ae7c1b78 2023-01-10 stsp client->ncapa_alloc = 0;
664 ae7c1b78 2023-01-10 stsp return got_error_from_errno("calloc");
667 ae7c1b78 2023-01-10 stsp log_debug("expecting %zu capabilities from uid %d",
668 ae7c1b78 2023-01-10 stsp client->ncapa_alloc, client->euid);
669 ae7c1b78 2023-01-10 stsp return NULL;
672 ae7c1b78 2023-01-10 stsp static const struct got_error *
673 ae7c1b78 2023-01-10 stsp recv_capability(struct gotd_session_client *client, struct imsg *imsg)
675 ae7c1b78 2023-01-10 stsp struct gotd_imsg_capability icapa;
676 ae7c1b78 2023-01-10 stsp struct gotd_client_capability *capa;
677 ae7c1b78 2023-01-10 stsp size_t datalen;
678 ae7c1b78 2023-01-10 stsp char *key, *value = NULL;
680 ae7c1b78 2023-01-10 stsp if (client->capabilities == NULL ||
681 ae7c1b78 2023-01-10 stsp client->ncapabilities >= client->ncapa_alloc) {
682 ae7c1b78 2023-01-10 stsp return got_error_msg(GOT_ERR_BAD_REQUEST,
683 ae7c1b78 2023-01-10 stsp "unexpected capability received");
686 ae7c1b78 2023-01-10 stsp memset(&icapa, 0, sizeof(icapa));
688 ae7c1b78 2023-01-10 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
689 ae7c1b78 2023-01-10 stsp if (datalen < sizeof(icapa))
690 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
691 ae7c1b78 2023-01-10 stsp memcpy(&icapa, imsg->data, sizeof(icapa));
693 ae7c1b78 2023-01-10 stsp if (datalen != sizeof(icapa) + icapa.key_len + icapa.value_len)
694 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
696 00b3e9ae 2023-01-11 op key = strndup(imsg->data + sizeof(icapa), icapa.key_len);
697 ae7c1b78 2023-01-10 stsp if (key == NULL)
698 00b3e9ae 2023-01-11 op return got_error_from_errno("strndup");
699 ae7c1b78 2023-01-10 stsp if (icapa.value_len > 0) {
700 00b3e9ae 2023-01-11 op value = strndup(imsg->data + sizeof(icapa) + icapa.key_len,
701 00b3e9ae 2023-01-11 op icapa.value_len);
702 ae7c1b78 2023-01-10 stsp if (value == NULL) {
704 00b3e9ae 2023-01-11 op return got_error_from_errno("strndup");
708 ae7c1b78 2023-01-10 stsp capa = &client->capabilities[client->ncapabilities++];
709 ae7c1b78 2023-01-10 stsp capa->key = key;
710 ae7c1b78 2023-01-10 stsp capa->value = value;
713 ae7c1b78 2023-01-10 stsp log_debug("uid %d: capability %s=%s", client->euid, key, value);
715 ae7c1b78 2023-01-10 stsp log_debug("uid %d: capability %s", client->euid, key);
717 ae7c1b78 2023-01-10 stsp return NULL;
720 ae7c1b78 2023-01-10 stsp static const struct got_error *
721 ae7c1b78 2023-01-10 stsp ensure_client_is_reading(struct gotd_session_client *client)
723 ae7c1b78 2023-01-10 stsp if (client->is_writing) {
724 ae7c1b78 2023-01-10 stsp return got_error_fmt(GOT_ERR_BAD_PACKET,
725 ae7c1b78 2023-01-10 stsp "uid %d made a read-request but is not reading from "
726 ae7c1b78 2023-01-10 stsp "a repository", client->euid);
729 ae7c1b78 2023-01-10 stsp return NULL;
732 ae7c1b78 2023-01-10 stsp static const struct got_error *
733 ae7c1b78 2023-01-10 stsp ensure_client_is_writing(struct gotd_session_client *client)
735 ae7c1b78 2023-01-10 stsp if (!client->is_writing) {
736 ae7c1b78 2023-01-10 stsp return got_error_fmt(GOT_ERR_BAD_PACKET,
737 ae7c1b78 2023-01-10 stsp "uid %d made a write-request but is not writing to "
738 ae7c1b78 2023-01-10 stsp "a repository", client->euid);
741 ae7c1b78 2023-01-10 stsp return NULL;
744 ae7c1b78 2023-01-10 stsp static const struct got_error *
745 ae7c1b78 2023-01-10 stsp forward_want(struct gotd_session_client *client, struct imsg *imsg)
747 ae7c1b78 2023-01-10 stsp struct gotd_imsg_want ireq;
748 ae7c1b78 2023-01-10 stsp struct gotd_imsg_want iwant;
749 ae7c1b78 2023-01-10 stsp size_t datalen;
751 ae7c1b78 2023-01-10 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
752 ae7c1b78 2023-01-10 stsp if (datalen != sizeof(ireq))
753 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
755 ae7c1b78 2023-01-10 stsp memcpy(&ireq, imsg->data, datalen);
757 ae7c1b78 2023-01-10 stsp memset(&iwant, 0, sizeof(iwant));
758 ae7c1b78 2023-01-10 stsp memcpy(iwant.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
759 ae7c1b78 2023-01-10 stsp iwant.client_id = client->id;
761 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&client->repo_child_iev, GOTD_IMSG_WANT,
762 ae7c1b78 2023-01-10 stsp PROC_SESSION, -1, &iwant, sizeof(iwant)) == -1)
763 ae7c1b78 2023-01-10 stsp return got_error_from_errno("imsg compose WANT");
765 ae7c1b78 2023-01-10 stsp return NULL;
768 ae7c1b78 2023-01-10 stsp static const struct got_error *
769 ae7c1b78 2023-01-10 stsp forward_ref_update(struct gotd_session_client *client, struct imsg *imsg)
771 ae7c1b78 2023-01-10 stsp const struct got_error *err = NULL;
772 ae7c1b78 2023-01-10 stsp struct gotd_imsg_ref_update ireq;
773 ae7c1b78 2023-01-10 stsp struct gotd_imsg_ref_update *iref = NULL;
774 ae7c1b78 2023-01-10 stsp size_t datalen;
776 ae7c1b78 2023-01-10 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
777 ae7c1b78 2023-01-10 stsp if (datalen < sizeof(ireq))
778 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
779 ae7c1b78 2023-01-10 stsp memcpy(&ireq, imsg->data, sizeof(ireq));
780 ae7c1b78 2023-01-10 stsp if (datalen != sizeof(ireq) + ireq.name_len)
781 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
783 ae7c1b78 2023-01-10 stsp iref = malloc(datalen);
784 ae7c1b78 2023-01-10 stsp if (iref == NULL)
785 ae7c1b78 2023-01-10 stsp return got_error_from_errno("malloc");
786 ae7c1b78 2023-01-10 stsp memcpy(iref, imsg->data, datalen);
788 ae7c1b78 2023-01-10 stsp iref->client_id = client->id;
789 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&client->repo_child_iev,
790 ae7c1b78 2023-01-10 stsp GOTD_IMSG_REF_UPDATE, PROC_SESSION, -1, iref, datalen) == -1)
791 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg compose REF_UPDATE");
792 ae7c1b78 2023-01-10 stsp free(iref);
793 ae7c1b78 2023-01-10 stsp return err;
796 ae7c1b78 2023-01-10 stsp static const struct got_error *
797 ae7c1b78 2023-01-10 stsp forward_have(struct gotd_session_client *client, struct imsg *imsg)
799 ae7c1b78 2023-01-10 stsp struct gotd_imsg_have ireq;
800 ae7c1b78 2023-01-10 stsp struct gotd_imsg_have ihave;
801 ae7c1b78 2023-01-10 stsp size_t datalen;
803 ae7c1b78 2023-01-10 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
804 ae7c1b78 2023-01-10 stsp if (datalen != sizeof(ireq))
805 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
807 ae7c1b78 2023-01-10 stsp memcpy(&ireq, imsg->data, datalen);
809 ae7c1b78 2023-01-10 stsp memset(&ihave, 0, sizeof(ihave));
810 ae7c1b78 2023-01-10 stsp memcpy(ihave.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
811 ae7c1b78 2023-01-10 stsp ihave.client_id = client->id;
813 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&client->repo_child_iev, GOTD_IMSG_HAVE,
814 ae7c1b78 2023-01-10 stsp PROC_SESSION, -1, &ihave, sizeof(ihave)) == -1)
815 ae7c1b78 2023-01-10 stsp return got_error_from_errno("imsg compose HAVE");
817 ae7c1b78 2023-01-10 stsp return NULL;
821 ae7c1b78 2023-01-10 stsp client_has_capability(struct gotd_session_client *client, const char *capastr)
823 ae7c1b78 2023-01-10 stsp struct gotd_client_capability *capa;
826 ae7c1b78 2023-01-10 stsp if (client->ncapabilities == 0)
829 ae7c1b78 2023-01-10 stsp for (i = 0; i < client->ncapabilities; i++) {
830 ae7c1b78 2023-01-10 stsp capa = &client->capabilities[i];
831 ae7c1b78 2023-01-10 stsp if (strcmp(capa->key, capastr) == 0)
838 ae7c1b78 2023-01-10 stsp static const struct got_error *
839 ae7c1b78 2023-01-10 stsp recv_packfile(struct gotd_session_client *client)
841 ae7c1b78 2023-01-10 stsp const struct got_error *err = NULL;
842 ae7c1b78 2023-01-10 stsp struct gotd_imsg_recv_packfile ipack;
843 ae7c1b78 2023-01-10 stsp struct gotd_imsg_packfile_pipe ipipe;
844 ae7c1b78 2023-01-10 stsp struct gotd_imsg_packidx_file ifile;
845 ae7c1b78 2023-01-10 stsp char *basepath = NULL, *pack_path = NULL, *idx_path = NULL;
846 ae7c1b78 2023-01-10 stsp int packfd = -1, idxfd = -1;
847 ae7c1b78 2023-01-10 stsp int pipe[2] = { -1, -1 };
849 ae7c1b78 2023-01-10 stsp if (client->packfile_path) {
850 ae7c1b78 2023-01-10 stsp return got_error_fmt(GOT_ERR_PRIVSEP_MSG,
851 ae7c1b78 2023-01-10 stsp "uid %d already has a pack file", client->euid);
854 ae7c1b78 2023-01-10 stsp if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
855 ae7c1b78 2023-01-10 stsp return got_error_from_errno("socketpair");
857 ae7c1b78 2023-01-10 stsp memset(&ipipe, 0, sizeof(ipipe));
858 ae7c1b78 2023-01-10 stsp ipipe.client_id = client->id;
860 ae7c1b78 2023-01-10 stsp /* Send pack pipe end 0 to repo child process. */
861 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&client->repo_child_iev,
862 ae7c1b78 2023-01-10 stsp GOTD_IMSG_PACKFILE_PIPE, PROC_SESSION, pipe[0],
863 ae7c1b78 2023-01-10 stsp &ipipe, sizeof(ipipe)) == -1) {
864 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg compose PACKFILE_PIPE");
865 ae7c1b78 2023-01-10 stsp pipe[0] = -1;
868 ae7c1b78 2023-01-10 stsp pipe[0] = -1;
870 ae7c1b78 2023-01-10 stsp /* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
871 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&client->iev,
872 ae7c1b78 2023-01-10 stsp GOTD_IMSG_PACKFILE_PIPE, PROC_SESSION, pipe[1], NULL, 0) == -1)
873 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg compose PACKFILE_PIPE");
874 ae7c1b78 2023-01-10 stsp pipe[1] = -1;
876 ae7c1b78 2023-01-10 stsp if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.pack",
877 ae7c1b78 2023-01-10 stsp got_repo_get_path(gotd_session.repo), GOT_OBJECTS_PACK_DIR,
878 ae7c1b78 2023-01-10 stsp client->euid) == -1) {
879 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("asprintf");
883 ae7c1b78 2023-01-10 stsp err = got_opentemp_named_fd(&pack_path, &packfd, basepath, "");
887 ae7c1b78 2023-01-10 stsp free(basepath);
888 ae7c1b78 2023-01-10 stsp if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.idx",
889 ae7c1b78 2023-01-10 stsp got_repo_get_path(gotd_session.repo), GOT_OBJECTS_PACK_DIR,
890 ae7c1b78 2023-01-10 stsp client->euid) == -1) {
891 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("asprintf");
892 ae7c1b78 2023-01-10 stsp basepath = NULL;
895 ae7c1b78 2023-01-10 stsp err = got_opentemp_named_fd(&idx_path, &idxfd, basepath, "");
899 ae7c1b78 2023-01-10 stsp memset(&ifile, 0, sizeof(ifile));
900 ae7c1b78 2023-01-10 stsp ifile.client_id = client->id;
901 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&client->repo_child_iev,
902 ae7c1b78 2023-01-10 stsp GOTD_IMSG_PACKIDX_FILE, PROC_SESSION,
903 ae7c1b78 2023-01-10 stsp idxfd, &ifile, sizeof(ifile)) == -1) {
904 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg compose PACKIDX_FILE");
905 ae7c1b78 2023-01-10 stsp idxfd = -1;
908 ae7c1b78 2023-01-10 stsp idxfd = -1;
910 ae7c1b78 2023-01-10 stsp memset(&ipack, 0, sizeof(ipack));
911 ae7c1b78 2023-01-10 stsp ipack.client_id = client->id;
912 ae7c1b78 2023-01-10 stsp if (client_has_capability(client, GOT_CAPA_REPORT_STATUS))
913 ae7c1b78 2023-01-10 stsp ipack.report_status = 1;
915 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&client->repo_child_iev,
916 ae7c1b78 2023-01-10 stsp GOTD_IMSG_RECV_PACKFILE, PROC_SESSION, packfd,
917 ae7c1b78 2023-01-10 stsp &ipack, sizeof(ipack)) == -1) {
918 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg compose RECV_PACKFILE");
919 ae7c1b78 2023-01-10 stsp packfd = -1;
922 ae7c1b78 2023-01-10 stsp packfd = -1;
925 ae7c1b78 2023-01-10 stsp free(basepath);
926 ae7c1b78 2023-01-10 stsp if (pipe[0] != -1 && close(pipe[0]) == -1 && err == NULL)
927 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("close");
928 ae7c1b78 2023-01-10 stsp if (pipe[1] != -1 && close(pipe[1]) == -1 && err == NULL)
929 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("close");
930 ae7c1b78 2023-01-10 stsp if (packfd != -1 && close(packfd) == -1 && err == NULL)
931 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("close");
932 ae7c1b78 2023-01-10 stsp if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
933 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("close");
935 ae7c1b78 2023-01-10 stsp free(pack_path);
936 ae7c1b78 2023-01-10 stsp free(idx_path);
938 ae7c1b78 2023-01-10 stsp client->packfile_path = pack_path;
939 ae7c1b78 2023-01-10 stsp client->packidx_path = idx_path;
941 ae7c1b78 2023-01-10 stsp return err;
944 ae7c1b78 2023-01-10 stsp static const struct got_error *
945 ae7c1b78 2023-01-10 stsp send_packfile(struct gotd_session_client *client)
947 ae7c1b78 2023-01-10 stsp const struct got_error *err = NULL;
948 ae7c1b78 2023-01-10 stsp struct gotd_imsg_send_packfile ipack;
949 ae7c1b78 2023-01-10 stsp struct gotd_imsg_packfile_pipe ipipe;
950 ae7c1b78 2023-01-10 stsp int pipe[2];
952 ae7c1b78 2023-01-10 stsp if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
953 ae7c1b78 2023-01-10 stsp return got_error_from_errno("socketpair");
955 ae7c1b78 2023-01-10 stsp memset(&ipack, 0, sizeof(ipack));
956 ae7c1b78 2023-01-10 stsp memset(&ipipe, 0, sizeof(ipipe));
958 ae7c1b78 2023-01-10 stsp ipack.client_id = client->id;
959 ae7c1b78 2023-01-10 stsp if (client_has_capability(client, GOT_CAPA_SIDE_BAND_64K))
960 ae7c1b78 2023-01-10 stsp ipack.report_progress = 1;
962 ae7c1b78 2023-01-10 stsp client->delta_cache_fd = got_opentempfd();
963 ae7c1b78 2023-01-10 stsp if (client->delta_cache_fd == -1)
964 ae7c1b78 2023-01-10 stsp return got_error_from_errno("got_opentempfd");
966 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&client->repo_child_iev,
967 ae7c1b78 2023-01-10 stsp GOTD_IMSG_SEND_PACKFILE, PROC_GOTD, client->delta_cache_fd,
968 ae7c1b78 2023-01-10 stsp &ipack, sizeof(ipack)) == -1) {
969 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg compose SEND_PACKFILE");
970 ae7c1b78 2023-01-10 stsp close(pipe[0]);
971 ae7c1b78 2023-01-10 stsp close(pipe[1]);
972 ae7c1b78 2023-01-10 stsp return err;
975 ae7c1b78 2023-01-10 stsp ipipe.client_id = client->id;
977 ae7c1b78 2023-01-10 stsp /* Send pack pipe end 0 to repo child process. */
978 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&client->repo_child_iev,
979 ae7c1b78 2023-01-10 stsp GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD,
980 ae7c1b78 2023-01-10 stsp pipe[0], &ipipe, sizeof(ipipe)) == -1) {
981 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg compose PACKFILE_PIPE");
982 ae7c1b78 2023-01-10 stsp close(pipe[1]);
983 ae7c1b78 2023-01-10 stsp return err;
986 ae7c1b78 2023-01-10 stsp /* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
987 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&client->iev,
988 ae7c1b78 2023-01-10 stsp GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1], NULL, 0) == -1)
989 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg compose PACKFILE_PIPE");
991 ae7c1b78 2023-01-10 stsp return err;
994 ae7c1b78 2023-01-10 stsp static void
995 ae7c1b78 2023-01-10 stsp session_dispatch_listener(int fd, short events, void *arg)
997 ae7c1b78 2023-01-10 stsp struct gotd_imsgev *iev = arg;
998 ae7c1b78 2023-01-10 stsp struct imsgbuf *ibuf = &iev->ibuf;
999 ae7c1b78 2023-01-10 stsp struct gotd_session_client *client = &gotd_session_client;
1000 ae7c1b78 2023-01-10 stsp const struct got_error *err = NULL;
1001 ae7c1b78 2023-01-10 stsp struct imsg imsg;
1002 ae7c1b78 2023-01-10 stsp ssize_t n;
1004 ae7c1b78 2023-01-10 stsp if (events & EV_WRITE) {
1005 ae7c1b78 2023-01-10 stsp while (ibuf->w.queued) {
1006 ae7c1b78 2023-01-10 stsp n = msgbuf_write(&ibuf->w);
1007 ae7c1b78 2023-01-10 stsp if (n == -1 && errno == EPIPE) {
1009 ae7c1b78 2023-01-10 stsp * The client has closed its socket.
1010 ae7c1b78 2023-01-10 stsp * This can happen when Git clients are
1011 ae7c1b78 2023-01-10 stsp * done sending pack file data.
1013 ae7c1b78 2023-01-10 stsp msgbuf_clear(&ibuf->w);
1015 ae7c1b78 2023-01-10 stsp } else if (n == -1 && errno != EAGAIN) {
1016 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg_flush");
1017 ae7c1b78 2023-01-10 stsp disconnect_on_error(client, err);
1020 ae7c1b78 2023-01-10 stsp if (n == 0) {
1021 ae7c1b78 2023-01-10 stsp /* Connection closed. */
1022 ae7c1b78 2023-01-10 stsp err = got_error(GOT_ERR_EOF);
1023 ae7c1b78 2023-01-10 stsp disconnect_on_error(client, err);
1029 ae7c1b78 2023-01-10 stsp if ((events & EV_READ) == 0)
1032 ae7c1b78 2023-01-10 stsp memset(&imsg, 0, sizeof(imsg));
1034 ae7c1b78 2023-01-10 stsp while (err == NULL) {
1035 ae7c1b78 2023-01-10 stsp err = gotd_imsg_recv(&imsg, ibuf, 0);
1036 ae7c1b78 2023-01-10 stsp if (err) {
1037 ae7c1b78 2023-01-10 stsp if (err->code == GOT_ERR_PRIVSEP_READ)
1038 ae7c1b78 2023-01-10 stsp err = NULL;
1042 ae7c1b78 2023-01-10 stsp evtimer_del(&client->tmo);
1044 ae7c1b78 2023-01-10 stsp switch (imsg.hdr.type) {
1045 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_CAPABILITIES:
1046 ae7c1b78 2023-01-10 stsp if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1047 ae7c1b78 2023-01-10 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1048 ae7c1b78 2023-01-10 stsp "unexpected capabilities received");
1051 ae7c1b78 2023-01-10 stsp log_debug("receiving capabilities from uid %d",
1052 ae7c1b78 2023-01-10 stsp client->euid);
1053 ae7c1b78 2023-01-10 stsp err = recv_capabilities(client, &imsg);
1055 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_CAPABILITY:
1056 ae7c1b78 2023-01-10 stsp if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1057 ae7c1b78 2023-01-10 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1058 ae7c1b78 2023-01-10 stsp "unexpected capability received");
1061 ae7c1b78 2023-01-10 stsp err = recv_capability(client, &imsg);
1062 ae7c1b78 2023-01-10 stsp if (err || client->ncapabilities < client->ncapa_alloc)
1064 ae7c1b78 2023-01-10 stsp if (!client->is_writing) {
1065 ae7c1b78 2023-01-10 stsp client->state = GOTD_STATE_EXPECT_WANT;
1066 3448a19a 2023-01-21 stsp client->accept_flush_pkt = 1;
1067 ae7c1b78 2023-01-10 stsp log_debug("uid %d: expecting want-lines",
1068 ae7c1b78 2023-01-10 stsp client->euid);
1069 ae7c1b78 2023-01-10 stsp } else if (client->is_writing) {
1070 ae7c1b78 2023-01-10 stsp client->state = GOTD_STATE_EXPECT_REF_UPDATE;
1071 3448a19a 2023-01-21 stsp client->accept_flush_pkt = 1;
1072 ae7c1b78 2023-01-10 stsp log_debug("uid %d: expecting ref-update-lines",
1073 ae7c1b78 2023-01-10 stsp client->euid);
1075 ae7c1b78 2023-01-10 stsp fatalx("client %d is both reading and writing",
1076 ae7c1b78 2023-01-10 stsp client->euid);
1078 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_WANT:
1079 ae7c1b78 2023-01-10 stsp if (client->state != GOTD_STATE_EXPECT_WANT) {
1080 ae7c1b78 2023-01-10 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1081 ae7c1b78 2023-01-10 stsp "unexpected want-line received");
1084 ae7c1b78 2023-01-10 stsp log_debug("received want-line from uid %d",
1085 ae7c1b78 2023-01-10 stsp client->euid);
1086 ae7c1b78 2023-01-10 stsp err = ensure_client_is_reading(client);
1089 3448a19a 2023-01-21 stsp client->accept_flush_pkt = 1;
1090 ae7c1b78 2023-01-10 stsp err = forward_want(client, &imsg);
1092 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_REF_UPDATE:
1093 6da1c69c 2023-01-18 stsp if (client->state != GOTD_STATE_EXPECT_REF_UPDATE &&
1094 6da1c69c 2023-01-18 stsp client->state !=
1095 6da1c69c 2023-01-18 stsp GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1096 ae7c1b78 2023-01-10 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1097 ae7c1b78 2023-01-10 stsp "unexpected ref-update-line received");
1100 ae7c1b78 2023-01-10 stsp log_debug("received ref-update-line from uid %d",
1101 ae7c1b78 2023-01-10 stsp client->euid);
1102 ae7c1b78 2023-01-10 stsp err = ensure_client_is_writing(client);
1105 ae7c1b78 2023-01-10 stsp err = forward_ref_update(client, &imsg);
1108 ae7c1b78 2023-01-10 stsp client->state = GOTD_STATE_EXPECT_MORE_REF_UPDATES;
1109 3448a19a 2023-01-21 stsp client->accept_flush_pkt = 1;
1111 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_HAVE:
1112 ae7c1b78 2023-01-10 stsp if (client->state != GOTD_STATE_EXPECT_HAVE) {
1113 ae7c1b78 2023-01-10 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1114 ae7c1b78 2023-01-10 stsp "unexpected have-line received");
1117 ae7c1b78 2023-01-10 stsp log_debug("received have-line from uid %d",
1118 ae7c1b78 2023-01-10 stsp client->euid);
1119 ae7c1b78 2023-01-10 stsp err = ensure_client_is_reading(client);
1122 ae7c1b78 2023-01-10 stsp err = forward_have(client, &imsg);
1125 3448a19a 2023-01-21 stsp client->accept_flush_pkt = 1;
1127 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_FLUSH:
1128 ae7c1b78 2023-01-10 stsp if (client->state == GOTD_STATE_EXPECT_WANT ||
1129 ae7c1b78 2023-01-10 stsp client->state == GOTD_STATE_EXPECT_HAVE) {
1130 ae7c1b78 2023-01-10 stsp err = ensure_client_is_reading(client);
1133 ae7c1b78 2023-01-10 stsp } else if (client->state ==
1134 ae7c1b78 2023-01-10 stsp GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1135 ae7c1b78 2023-01-10 stsp err = ensure_client_is_writing(client);
1138 f9550d47 2023-01-18 stsp } else if (client->state != GOTD_STATE_EXPECT_DONE) {
1139 3448a19a 2023-01-21 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1140 3448a19a 2023-01-21 stsp "unexpected flush-pkt received");
1143 3448a19a 2023-01-21 stsp if (!client->accept_flush_pkt) {
1144 ae7c1b78 2023-01-10 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1145 ae7c1b78 2023-01-10 stsp "unexpected flush-pkt received");
1150 3448a19a 2023-01-21 stsp * Accept just one flush packet at a time.
1151 3448a19a 2023-01-21 stsp * Future client state transitions will set this flag
1152 3448a19a 2023-01-21 stsp * again if another flush packet is expected.
1154 3448a19a 2023-01-21 stsp client->accept_flush_pkt = 0;
1156 ae7c1b78 2023-01-10 stsp log_debug("received flush-pkt from uid %d",
1157 ae7c1b78 2023-01-10 stsp client->euid);
1158 ae7c1b78 2023-01-10 stsp if (client->state == GOTD_STATE_EXPECT_WANT) {
1159 ae7c1b78 2023-01-10 stsp client->state = GOTD_STATE_EXPECT_HAVE;
1160 ae7c1b78 2023-01-10 stsp log_debug("uid %d: expecting have-lines",
1161 ae7c1b78 2023-01-10 stsp client->euid);
1162 ae7c1b78 2023-01-10 stsp } else if (client->state == GOTD_STATE_EXPECT_HAVE) {
1163 ae7c1b78 2023-01-10 stsp client->state = GOTD_STATE_EXPECT_DONE;
1164 3448a19a 2023-01-21 stsp client->accept_flush_pkt = 1;
1165 ae7c1b78 2023-01-10 stsp log_debug("uid %d: expecting 'done'",
1166 ae7c1b78 2023-01-10 stsp client->euid);
1167 ae7c1b78 2023-01-10 stsp } else if (client->state ==
1168 ae7c1b78 2023-01-10 stsp GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1169 ae7c1b78 2023-01-10 stsp client->state = GOTD_STATE_EXPECT_PACKFILE;
1170 ae7c1b78 2023-01-10 stsp log_debug("uid %d: expecting packfile",
1171 ae7c1b78 2023-01-10 stsp client->euid);
1172 ae7c1b78 2023-01-10 stsp err = recv_packfile(client);
1173 f9550d47 2023-01-18 stsp } else if (client->state != GOTD_STATE_EXPECT_DONE) {
1174 ae7c1b78 2023-01-10 stsp /* should not happen, see above */
1175 ae7c1b78 2023-01-10 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1176 ae7c1b78 2023-01-10 stsp "unexpected client state");
1180 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_DONE:
1181 ae7c1b78 2023-01-10 stsp if (client->state != GOTD_STATE_EXPECT_HAVE &&
1182 ae7c1b78 2023-01-10 stsp client->state != GOTD_STATE_EXPECT_DONE) {
1183 ae7c1b78 2023-01-10 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1184 ae7c1b78 2023-01-10 stsp "unexpected flush-pkt received");
1187 ae7c1b78 2023-01-10 stsp log_debug("received 'done' from uid %d", client->euid);
1188 ae7c1b78 2023-01-10 stsp err = ensure_client_is_reading(client);
1191 ae7c1b78 2023-01-10 stsp client->state = GOTD_STATE_DONE;
1192 3448a19a 2023-01-21 stsp client->accept_flush_pkt = 1;
1193 ae7c1b78 2023-01-10 stsp err = send_packfile(client);
1196 ae7c1b78 2023-01-10 stsp log_debug("unexpected imsg %d", imsg.hdr.type);
1197 ae7c1b78 2023-01-10 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
1201 ae7c1b78 2023-01-10 stsp imsg_free(&imsg);
1204 ae7c1b78 2023-01-10 stsp if (err) {
1205 ae7c1b78 2023-01-10 stsp if (err->code != GOT_ERR_EOF ||
1206 ae7c1b78 2023-01-10 stsp client->state != GOTD_STATE_EXPECT_PACKFILE)
1207 ae7c1b78 2023-01-10 stsp disconnect_on_error(client, err);
1209 ae7c1b78 2023-01-10 stsp gotd_imsg_event_add(iev);
1210 ae7c1b78 2023-01-10 stsp evtimer_add(&client->tmo, &gotd_session.request_timeout);
1214 ae7c1b78 2023-01-10 stsp static const struct got_error *
1215 ae7c1b78 2023-01-10 stsp list_refs_request(void)
1217 ae7c1b78 2023-01-10 stsp static const struct got_error *err;
1218 ae7c1b78 2023-01-10 stsp struct gotd_session_client *client = &gotd_session_client;
1219 ae7c1b78 2023-01-10 stsp struct gotd_imsgev *iev = &client->repo_child_iev;
1220 ae7c1b78 2023-01-10 stsp struct gotd_imsg_list_refs_internal ilref;
1223 ae7c1b78 2023-01-10 stsp if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1224 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_MSG);
1226 ae7c1b78 2023-01-10 stsp memset(&ilref, 0, sizeof(ilref));
1227 ae7c1b78 2023-01-10 stsp ilref.client_id = client->id;
1229 ae7c1b78 2023-01-10 stsp fd = dup(client->fd);
1230 ae7c1b78 2023-01-10 stsp if (fd == -1)
1231 ae7c1b78 2023-01-10 stsp return got_error_from_errno("dup");
1233 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(iev, GOTD_IMSG_LIST_REFS_INTERNAL,
1234 ae7c1b78 2023-01-10 stsp PROC_SESSION, fd, &ilref, sizeof(ilref)) == -1) {
1235 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg compose LIST_REFS_INTERNAL");
1236 ae7c1b78 2023-01-10 stsp close(fd);
1237 ae7c1b78 2023-01-10 stsp return err;
1240 ae7c1b78 2023-01-10 stsp client->state = GOTD_STATE_EXPECT_CAPABILITIES;
1241 ae7c1b78 2023-01-10 stsp log_debug("uid %d: expecting capabilities", client->euid);
1242 ae7c1b78 2023-01-10 stsp return NULL;
1245 ae7c1b78 2023-01-10 stsp static const struct got_error *
1246 ae7c1b78 2023-01-10 stsp recv_connect(struct imsg *imsg)
1248 ae7c1b78 2023-01-10 stsp struct gotd_session_client *client = &gotd_session_client;
1249 ae7c1b78 2023-01-10 stsp struct gotd_imsg_connect iconnect;
1250 ae7c1b78 2023-01-10 stsp size_t datalen;
1252 ae7c1b78 2023-01-10 stsp if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1253 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_MSG);
1255 ae7c1b78 2023-01-10 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1256 ae7c1b78 2023-01-10 stsp if (datalen != sizeof(iconnect))
1257 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1258 ae7c1b78 2023-01-10 stsp memcpy(&iconnect, imsg->data, sizeof(iconnect));
1260 ae7c1b78 2023-01-10 stsp if (imsg->fd == -1)
1261 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_NO_FD);
1263 ae7c1b78 2023-01-10 stsp client->fd = imsg->fd;
1264 ae7c1b78 2023-01-10 stsp client->euid = iconnect.euid;
1265 ae7c1b78 2023-01-10 stsp client->egid = iconnect.egid;
1267 ae7c1b78 2023-01-10 stsp imsg_init(&client->iev.ibuf, client->fd);
1268 ae7c1b78 2023-01-10 stsp client->iev.handler = session_dispatch_listener;
1269 ae7c1b78 2023-01-10 stsp client->iev.events = EV_READ;
1270 ae7c1b78 2023-01-10 stsp client->iev.handler_arg = NULL;
1271 ae7c1b78 2023-01-10 stsp event_set(&client->iev.ev, client->iev.ibuf.fd, EV_READ,
1272 ae7c1b78 2023-01-10 stsp session_dispatch_listener, &client->iev);
1273 ae7c1b78 2023-01-10 stsp gotd_imsg_event_add(&client->iev);
1274 ae7c1b78 2023-01-10 stsp evtimer_set(&client->tmo, gotd_request_timeout, client);
1276 ae7c1b78 2023-01-10 stsp return NULL;
1279 ae7c1b78 2023-01-10 stsp static const struct got_error *
1280 ae7c1b78 2023-01-10 stsp recv_repo_child(struct imsg *imsg)
1282 ae7c1b78 2023-01-10 stsp struct gotd_imsg_connect_repo_child ichild;
1283 ae7c1b78 2023-01-10 stsp struct gotd_session_client *client = &gotd_session_client;
1284 ae7c1b78 2023-01-10 stsp size_t datalen;
1286 ae7c1b78 2023-01-10 stsp if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1287 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_MSG);
1289 ae7c1b78 2023-01-10 stsp /* We should already have received a pipe to the listener. */
1290 ae7c1b78 2023-01-10 stsp if (client->fd == -1)
1291 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_MSG);
1293 ae7c1b78 2023-01-10 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1294 ae7c1b78 2023-01-10 stsp if (datalen != sizeof(ichild))
1295 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1297 ae7c1b78 2023-01-10 stsp memcpy(&ichild, imsg->data, sizeof(ichild));
1299 ae7c1b78 2023-01-10 stsp client->id = ichild.client_id;
1300 ae7c1b78 2023-01-10 stsp if (ichild.proc_id == PROC_REPO_WRITE)
1301 ae7c1b78 2023-01-10 stsp client->is_writing = 1;
1302 ae7c1b78 2023-01-10 stsp else if (ichild.proc_id == PROC_REPO_READ)
1303 ae7c1b78 2023-01-10 stsp client->is_writing = 0;
1305 ae7c1b78 2023-01-10 stsp return got_error_msg(GOT_ERR_PRIVSEP_MSG,
1306 ae7c1b78 2023-01-10 stsp "bad child process type");
1308 ae7c1b78 2023-01-10 stsp if (imsg->fd == -1)
1309 ae7c1b78 2023-01-10 stsp return got_error(GOT_ERR_PRIVSEP_NO_FD);
1311 ae7c1b78 2023-01-10 stsp imsg_init(&client->repo_child_iev.ibuf, imsg->fd);
1312 ae7c1b78 2023-01-10 stsp client->repo_child_iev.handler = session_dispatch_repo_child;
1313 ae7c1b78 2023-01-10 stsp client->repo_child_iev.events = EV_READ;
1314 ae7c1b78 2023-01-10 stsp client->repo_child_iev.handler_arg = NULL;
1315 ae7c1b78 2023-01-10 stsp event_set(&client->repo_child_iev.ev, client->repo_child_iev.ibuf.fd,
1316 ae7c1b78 2023-01-10 stsp EV_READ, session_dispatch_repo_child, &client->repo_child_iev);
1317 ae7c1b78 2023-01-10 stsp gotd_imsg_event_add(&client->repo_child_iev);
1319 ae7c1b78 2023-01-10 stsp /* The "recvfd" pledge promise is no longer needed. */
1320 ae7c1b78 2023-01-10 stsp if (pledge("stdio rpath wpath cpath sendfd fattr flock", NULL) == -1)
1321 ae7c1b78 2023-01-10 stsp fatal("pledge");
1323 ae7c1b78 2023-01-10 stsp return NULL;
1326 ae7c1b78 2023-01-10 stsp static void
1327 ae7c1b78 2023-01-10 stsp session_dispatch(int fd, short event, void *arg)
1329 ae7c1b78 2023-01-10 stsp struct gotd_imsgev *iev = arg;
1330 ae7c1b78 2023-01-10 stsp struct imsgbuf *ibuf = &iev->ibuf;
1331 ae7c1b78 2023-01-10 stsp struct gotd_session_client *client = &gotd_session_client;
1332 ae7c1b78 2023-01-10 stsp ssize_t n;
1333 ae7c1b78 2023-01-10 stsp int shut = 0;
1334 ae7c1b78 2023-01-10 stsp struct imsg imsg;
1336 ae7c1b78 2023-01-10 stsp if (event & EV_READ) {
1337 ae7c1b78 2023-01-10 stsp if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1338 ae7c1b78 2023-01-10 stsp fatal("imsg_read error");
1339 ae7c1b78 2023-01-10 stsp if (n == 0) {
1340 ae7c1b78 2023-01-10 stsp /* Connection closed. */
1342 ae7c1b78 2023-01-10 stsp goto done;
1346 ae7c1b78 2023-01-10 stsp if (event & EV_WRITE) {
1347 ae7c1b78 2023-01-10 stsp n = msgbuf_write(&ibuf->w);
1348 ae7c1b78 2023-01-10 stsp if (n == -1 && errno != EAGAIN)
1349 ae7c1b78 2023-01-10 stsp fatal("msgbuf_write");
1350 ae7c1b78 2023-01-10 stsp if (n == 0) {
1351 ae7c1b78 2023-01-10 stsp /* Connection closed. */
1353 ae7c1b78 2023-01-10 stsp goto done;
1357 ae7c1b78 2023-01-10 stsp for (;;) {
1358 ae7c1b78 2023-01-10 stsp const struct got_error *err = NULL;
1359 ae7c1b78 2023-01-10 stsp uint32_t client_id = 0;
1360 ae7c1b78 2023-01-10 stsp int do_disconnect = 0, do_list_refs = 0;
1362 ae7c1b78 2023-01-10 stsp if ((n = imsg_get(ibuf, &imsg)) == -1)
1363 ae7c1b78 2023-01-10 stsp fatal("%s: imsg_get error", __func__);
1364 ae7c1b78 2023-01-10 stsp if (n == 0) /* No more messages. */
1367 ae7c1b78 2023-01-10 stsp switch (imsg.hdr.type) {
1368 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_ERROR:
1369 ae7c1b78 2023-01-10 stsp do_disconnect = 1;
1370 ae7c1b78 2023-01-10 stsp err = gotd_imsg_recv_error(&client_id, &imsg);
1372 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_CONNECT:
1373 ae7c1b78 2023-01-10 stsp err = recv_connect(&imsg);
1375 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_DISCONNECT:
1376 ae7c1b78 2023-01-10 stsp do_disconnect = 1;
1378 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_CONNECT_REPO_CHILD:
1379 ae7c1b78 2023-01-10 stsp err = recv_repo_child(&imsg);
1382 ae7c1b78 2023-01-10 stsp do_list_refs = 1;
1385 ae7c1b78 2023-01-10 stsp log_debug("unexpected imsg %d", imsg.hdr.type);
1388 ae7c1b78 2023-01-10 stsp imsg_free(&imsg);
1390 ae7c1b78 2023-01-10 stsp if (do_disconnect) {
1392 ae7c1b78 2023-01-10 stsp disconnect_on_error(client, err);
1394 ae7c1b78 2023-01-10 stsp disconnect(client);
1395 ae7c1b78 2023-01-10 stsp } else if (do_list_refs)
1396 ae7c1b78 2023-01-10 stsp err = list_refs_request();
1399 ae7c1b78 2023-01-10 stsp log_warnx("uid %d: %s", client->euid, err->msg);
1402 ae7c1b78 2023-01-10 stsp if (!shut) {
1403 ae7c1b78 2023-01-10 stsp gotd_imsg_event_add(iev);
1405 ae7c1b78 2023-01-10 stsp /* This pipe is dead. Remove its event handler */
1406 ae7c1b78 2023-01-10 stsp event_del(&iev->ev);
1407 ae7c1b78 2023-01-10 stsp event_loopexit(NULL);
1412 ae7c1b78 2023-01-10 stsp session_main(const char *title, const char *repo_path,
1413 ae7c1b78 2023-01-10 stsp int *pack_fds, int *temp_fds, struct timeval *request_timeout)
1415 ae7c1b78 2023-01-10 stsp const struct got_error *err = NULL;
1416 ae7c1b78 2023-01-10 stsp struct event evsigint, evsigterm, evsighup, evsigusr1;
1418 ae7c1b78 2023-01-10 stsp gotd_session.title = title;
1419 ae7c1b78 2023-01-10 stsp gotd_session.pid = getpid();
1420 ae7c1b78 2023-01-10 stsp gotd_session.pack_fds = pack_fds;
1421 ae7c1b78 2023-01-10 stsp gotd_session.temp_fds = temp_fds;
1422 ae7c1b78 2023-01-10 stsp memcpy(&gotd_session.request_timeout, request_timeout,
1423 ae7c1b78 2023-01-10 stsp sizeof(gotd_session.request_timeout));
1425 ae7c1b78 2023-01-10 stsp err = got_repo_open(&gotd_session.repo, repo_path, NULL, pack_fds);
1427 ae7c1b78 2023-01-10 stsp goto done;
1428 ae7c1b78 2023-01-10 stsp if (!got_repo_is_bare(gotd_session.repo)) {
1429 ae7c1b78 2023-01-10 stsp err = got_error_msg(GOT_ERR_NOT_GIT_REPO,
1430 ae7c1b78 2023-01-10 stsp "bare git repository required");
1431 ae7c1b78 2023-01-10 stsp goto done;
1434 ae7c1b78 2023-01-10 stsp got_repo_temp_fds_set(gotd_session.repo, temp_fds);
1436 ae7c1b78 2023-01-10 stsp signal_set(&evsigint, SIGINT, gotd_session_sighdlr, NULL);
1437 ae7c1b78 2023-01-10 stsp signal_set(&evsigterm, SIGTERM, gotd_session_sighdlr, NULL);
1438 ae7c1b78 2023-01-10 stsp signal_set(&evsighup, SIGHUP, gotd_session_sighdlr, NULL);
1439 ae7c1b78 2023-01-10 stsp signal_set(&evsigusr1, SIGUSR1, gotd_session_sighdlr, NULL);
1440 ae7c1b78 2023-01-10 stsp signal(SIGPIPE, SIG_IGN);
1442 ae7c1b78 2023-01-10 stsp signal_add(&evsigint, NULL);
1443 ae7c1b78 2023-01-10 stsp signal_add(&evsigterm, NULL);
1444 ae7c1b78 2023-01-10 stsp signal_add(&evsighup, NULL);
1445 ae7c1b78 2023-01-10 stsp signal_add(&evsigusr1, NULL);
1447 ae7c1b78 2023-01-10 stsp gotd_session_client.state = GOTD_STATE_EXPECT_LIST_REFS;
1448 ae7c1b78 2023-01-10 stsp gotd_session_client.fd = -1;
1449 ae7c1b78 2023-01-10 stsp gotd_session_client.nref_updates = -1;
1450 2fc51af0 2023-01-10 stsp gotd_session_client.delta_cache_fd = -1;
1451 3448a19a 2023-01-21 stsp gotd_session_client.accept_flush_pkt = 1;
1453 ae7c1b78 2023-01-10 stsp imsg_init(&gotd_session.parent_iev.ibuf, GOTD_FILENO_MSG_PIPE);
1454 ae7c1b78 2023-01-10 stsp gotd_session.parent_iev.handler = session_dispatch;
1455 ae7c1b78 2023-01-10 stsp gotd_session.parent_iev.events = EV_READ;
1456 ae7c1b78 2023-01-10 stsp gotd_session.parent_iev.handler_arg = NULL;
1457 ae7c1b78 2023-01-10 stsp event_set(&gotd_session.parent_iev.ev, gotd_session.parent_iev.ibuf.fd,
1458 ae7c1b78 2023-01-10 stsp EV_READ, session_dispatch, &gotd_session.parent_iev);
1459 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&gotd_session.parent_iev,
1460 ae7c1b78 2023-01-10 stsp GOTD_IMSG_CLIENT_SESSION_READY, PROC_SESSION, -1, NULL, 0) == -1) {
1461 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg compose CLIENT_SESSION_READY");
1462 ae7c1b78 2023-01-10 stsp goto done;
1465 ae7c1b78 2023-01-10 stsp event_dispatch();
1468 ae7c1b78 2023-01-10 stsp log_warnx("%s: %s", title, err->msg);
1469 ae7c1b78 2023-01-10 stsp gotd_session_shutdown();
1473 ae7c1b78 2023-01-10 stsp gotd_session_shutdown(void)
1475 ae7c1b78 2023-01-10 stsp log_debug("%s: shutting down", gotd_session.title);
1476 ae7c1b78 2023-01-10 stsp if (gotd_session.repo)
1477 ae7c1b78 2023-01-10 stsp got_repo_close(gotd_session.repo);
1478 ae7c1b78 2023-01-10 stsp got_repo_pack_fds_close(gotd_session.pack_fds);
1479 ae7c1b78 2023-01-10 stsp got_repo_temp_fds_close(gotd_session.temp_fds);
