1 13b2bc37 2022-10-23 stsp /*
  2 13b2bc37 2022-10-23 stsp  * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
  3 13b2bc37 2022-10-23 stsp  *
  4 13b2bc37 2022-10-23 stsp  * Permission to use, copy, modify, and distribute this software for any
  5 13b2bc37 2022-10-23 stsp  * purpose with or without fee is hereby granted, provided that the above
  6 13b2bc37 2022-10-23 stsp  * copyright notice and this permission notice appear in all copies.
  7 13b2bc37 2022-10-23 stsp  *
  8 13b2bc37 2022-10-23 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 13b2bc37 2022-10-23 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 13b2bc37 2022-10-23 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 13b2bc37 2022-10-23 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 13b2bc37 2022-10-23 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 13b2bc37 2022-10-23 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 13b2bc37 2022-10-23 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 13b2bc37 2022-10-23 stsp  */
 16 13b2bc37 2022-10-23 stsp 
 17 13b2bc37 2022-10-23 stsp #include <sys/queue.h>
 18 13b2bc37 2022-10-23 stsp #include <sys/types.h>
 19 13b2bc37 2022-10-23 stsp 
 20 13b2bc37 2022-10-23 stsp #include <event.h>
 21 13b2bc37 2022-10-23 stsp #include <errno.h>
 22 13b2bc37 2022-10-23 stsp #include <imsg.h>
 23 13b2bc37 2022-10-23 stsp #include <signal.h>
 24 13b2bc37 2022-10-23 stsp #include <stdlib.h>
 25 13b2bc37 2022-10-23 stsp #include <limits.h>
 26 13b2bc37 2022-10-23 stsp #include <poll.h>
 27 13b2bc37 2022-10-23 stsp #include <sha1.h>
 28 13b2bc37 2022-10-23 stsp #include <siphash.h>
 29 13b2bc37 2022-10-23 stsp #include <stdio.h>
 30 13b2bc37 2022-10-23 stsp #include <string.h>
 31 13b2bc37 2022-10-23 stsp #include <unistd.h>
 32 13b2bc37 2022-10-23 stsp 
 33 13b2bc37 2022-10-23 stsp #include "got_error.h"
 34 13b2bc37 2022-10-23 stsp #include "got_cancel.h"
 35 13b2bc37 2022-10-23 stsp #include "got_object.h"
 36 13b2bc37 2022-10-23 stsp #include "got_repository.h"
 37 13b2bc37 2022-10-23 stsp #include "got_reference.h"
 38 13b2bc37 2022-10-23 stsp #include "got_repository_admin.h"
 39 13b2bc37 2022-10-23 stsp 
 40 13b2bc37 2022-10-23 stsp #include "got_lib_delta.h"
 41 13b2bc37 2022-10-23 stsp #include "got_lib_object.h"
 42 13b2bc37 2022-10-23 stsp #include "got_lib_object_idset.h"
 43 13b2bc37 2022-10-23 stsp #include "got_lib_sha1.h"
 44 13b2bc37 2022-10-23 stsp #include "got_lib_pack.h"
 45 13b2bc37 2022-10-23 stsp #include "got_lib_ratelimit.h"
 46 13b2bc37 2022-10-23 stsp #include "got_lib_pack_create.h"
 47 13b2bc37 2022-10-23 stsp #include "got_lib_poll.h"
 48 13b2bc37 2022-10-23 stsp 
 49 13b2bc37 2022-10-23 stsp #include "log.h"
 50 13b2bc37 2022-10-23 stsp #include "gotd.h"
 51 13b2bc37 2022-10-23 stsp #include "repo_read.h"
 52 13b2bc37 2022-10-23 stsp 
 53 13b2bc37 2022-10-23 stsp #ifndef nitems
 54 13b2bc37 2022-10-23 stsp #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
 55 13b2bc37 2022-10-23 stsp #endif
 56 13b2bc37 2022-10-23 stsp 
 57 13b2bc37 2022-10-23 stsp static struct repo_read {
 58 13b2bc37 2022-10-23 stsp 	pid_t pid;
 59 13b2bc37 2022-10-23 stsp 	const char *title;
 60 13b2bc37 2022-10-23 stsp 	struct got_repository *repo;
 61 13b2bc37 2022-10-23 stsp 	int *pack_fds;
 62 13b2bc37 2022-10-23 stsp 	int *temp_fds;
 63 13b2bc37 2022-10-23 stsp } repo_read;
 64 13b2bc37 2022-10-23 stsp 
 65 13b2bc37 2022-10-23 stsp struct repo_read_client {
 66 13b2bc37 2022-10-23 stsp 	STAILQ_ENTRY(repo_read_client)	 entry;
 67 13b2bc37 2022-10-23 stsp 	uint32_t			 id;
 68 13b2bc37 2022-10-23 stsp 	int				 fd;
 69 13b2bc37 2022-10-23 stsp 	int				 delta_cache_fd;
 70 13b2bc37 2022-10-23 stsp 	int				 report_progress;
 71 86769de8 2022-10-28 stsp 	int				 pack_pipe;
 72 13b2bc37 2022-10-23 stsp 	struct gotd_object_id_array	 want_ids;
 73 13b2bc37 2022-10-23 stsp 	struct gotd_object_id_array	 have_ids;
 74 13b2bc37 2022-10-23 stsp };
 75 13b2bc37 2022-10-23 stsp STAILQ_HEAD(repo_read_clients, repo_read_client);
 76 13b2bc37 2022-10-23 stsp 
 77 13b2bc37 2022-10-23 stsp static struct repo_read_clients repo_read_clients[GOTD_CLIENT_TABLE_SIZE];
 78 13b2bc37 2022-10-23 stsp static SIPHASH_KEY clients_hash_key;
 79 13b2bc37 2022-10-23 stsp 
 80 13b2bc37 2022-10-23 stsp static uint64_t
 81 13b2bc37 2022-10-23 stsp client_hash(uint32_t client_id)
 82 13b2bc37 2022-10-23 stsp {
 83 13b2bc37 2022-10-23 stsp 	return SipHash24(&clients_hash_key, &client_id, sizeof(client_id));
 84 13b2bc37 2022-10-23 stsp }
 85 13b2bc37 2022-10-23 stsp 
 86 13b2bc37 2022-10-23 stsp static void
 87 13b2bc37 2022-10-23 stsp add_client(struct repo_read_client *client, uint32_t client_id, int fd)
 88 13b2bc37 2022-10-23 stsp {
 89 13b2bc37 2022-10-23 stsp 	uint64_t slot;
 90 13b2bc37 2022-10-23 stsp 
 91 13b2bc37 2022-10-23 stsp 	client->id = client_id;
 92 13b2bc37 2022-10-23 stsp 	client->fd = fd;
 93 13b2bc37 2022-10-23 stsp 	client->delta_cache_fd = -1;
 94 86769de8 2022-10-28 stsp 	client->pack_pipe = -1;
 95 13b2bc37 2022-10-23 stsp 	slot = client_hash(client->id) % nitems(repo_read_clients);
 96 13b2bc37 2022-10-23 stsp 	STAILQ_INSERT_HEAD(&repo_read_clients[slot], client, entry);
 97 13b2bc37 2022-10-23 stsp }
 98 13b2bc37 2022-10-23 stsp 
 99 13b2bc37 2022-10-23 stsp static struct repo_read_client *
100 13b2bc37 2022-10-23 stsp find_client(uint32_t client_id)
101 13b2bc37 2022-10-23 stsp {
102 13b2bc37 2022-10-23 stsp 	uint64_t slot;
103 13b2bc37 2022-10-23 stsp 	struct repo_read_client *c;
104 13b2bc37 2022-10-23 stsp 
105 13b2bc37 2022-10-23 stsp 	slot = client_hash(client_id) % nitems(repo_read_clients);
106 13b2bc37 2022-10-23 stsp 	STAILQ_FOREACH(c, &repo_read_clients[slot], entry) {
107 13b2bc37 2022-10-23 stsp 		if (c->id == client_id)
108 13b2bc37 2022-10-23 stsp 			return c;
109 13b2bc37 2022-10-23 stsp 	}
110 13b2bc37 2022-10-23 stsp 
111 13b2bc37 2022-10-23 stsp 	return NULL;
112 13b2bc37 2022-10-23 stsp }
113 13b2bc37 2022-10-23 stsp 
114 13b2bc37 2022-10-23 stsp static volatile sig_atomic_t sigint_received;
115 13b2bc37 2022-10-23 stsp static volatile sig_atomic_t sigterm_received;
116 13b2bc37 2022-10-23 stsp 
117 13b2bc37 2022-10-23 stsp static void
118 13b2bc37 2022-10-23 stsp catch_sigint(int signo)
119 13b2bc37 2022-10-23 stsp {
120 13b2bc37 2022-10-23 stsp 	sigint_received = 1;
121 13b2bc37 2022-10-23 stsp }
122 13b2bc37 2022-10-23 stsp 
123 13b2bc37 2022-10-23 stsp static void
124 13b2bc37 2022-10-23 stsp catch_sigterm(int signo)
125 13b2bc37 2022-10-23 stsp {
126 13b2bc37 2022-10-23 stsp 	sigterm_received = 1;
127 13b2bc37 2022-10-23 stsp }
128 13b2bc37 2022-10-23 stsp 
129 13b2bc37 2022-10-23 stsp static const struct got_error *
130 13b2bc37 2022-10-23 stsp check_cancelled(void *arg)
131 13b2bc37 2022-10-23 stsp {
132 13b2bc37 2022-10-23 stsp 	if (sigint_received || sigterm_received)
133 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_CANCELLED);
134 13b2bc37 2022-10-23 stsp 
135 13b2bc37 2022-10-23 stsp 	return NULL;
136 13b2bc37 2022-10-23 stsp }
137 13b2bc37 2022-10-23 stsp 
138 13b2bc37 2022-10-23 stsp static const struct got_error *
139 13b2bc37 2022-10-23 stsp send_symref(struct got_reference *symref, struct imsgbuf *ibuf)
140 13b2bc37 2022-10-23 stsp {
141 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
142 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_symref isymref;
143 13b2bc37 2022-10-23 stsp 	const char *refname = got_ref_get_name(symref);
144 13b2bc37 2022-10-23 stsp 	const char *target = got_ref_get_symref_target(symref);
145 13b2bc37 2022-10-23 stsp 	size_t len;
146 13b2bc37 2022-10-23 stsp 	struct ibuf *wbuf;
147 13b2bc37 2022-10-23 stsp 	struct got_object_id *target_id;
148 13b2bc37 2022-10-23 stsp 
149 13b2bc37 2022-10-23 stsp 	err = got_ref_resolve(&target_id, repo_read.repo, symref);
150 13b2bc37 2022-10-23 stsp 	if (err)
151 13b2bc37 2022-10-23 stsp 		return err;
152 13b2bc37 2022-10-23 stsp 
153 13b2bc37 2022-10-23 stsp 	memset(&isymref, 0, sizeof(isymref));
154 13b2bc37 2022-10-23 stsp 	isymref.name_len = strlen(refname);
155 13b2bc37 2022-10-23 stsp 	isymref.target_len = strlen(target);
156 13b2bc37 2022-10-23 stsp 	memcpy(isymref.target_id, target_id->sha1, sizeof(isymref.target_id));
157 13b2bc37 2022-10-23 stsp 
158 13b2bc37 2022-10-23 stsp 	len = sizeof(isymref) + isymref.name_len + isymref.target_len;
159 13b2bc37 2022-10-23 stsp 	if (len > MAX_IMSGSIZE - IMSG_HEADER_SIZE) {
160 13b2bc37 2022-10-23 stsp 		err = got_error(GOT_ERR_NO_SPACE);
161 13b2bc37 2022-10-23 stsp 		goto done;
162 13b2bc37 2022-10-23 stsp 	}
163 13b2bc37 2022-10-23 stsp 
164 13b2bc37 2022-10-23 stsp 	wbuf = imsg_create(ibuf, GOTD_IMSG_SYMREF, 0, 0, len);
165 13b2bc37 2022-10-23 stsp 	if (wbuf == NULL) {
166 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_create SYMREF");
167 13b2bc37 2022-10-23 stsp 		goto done;
168 13b2bc37 2022-10-23 stsp 	}
169 13b2bc37 2022-10-23 stsp 
170 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, &isymref, sizeof(isymref)) == -1) {
171 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add SYMREF");
172 13b2bc37 2022-10-23 stsp 		goto done;
173 13b2bc37 2022-10-23 stsp 	}
174 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, refname, isymref.name_len) == -1) {
175 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add SYMREF");
176 13b2bc37 2022-10-23 stsp 		goto done;
177 13b2bc37 2022-10-23 stsp 	}
178 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, target, isymref.target_len) == -1) {
179 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add SYMREF");
180 13b2bc37 2022-10-23 stsp 		goto done;
181 13b2bc37 2022-10-23 stsp 	}
182 13b2bc37 2022-10-23 stsp 
183 13b2bc37 2022-10-23 stsp 	wbuf->fd = -1;
184 13b2bc37 2022-10-23 stsp 	imsg_close(ibuf, wbuf);
185 13b2bc37 2022-10-23 stsp done:
186 13b2bc37 2022-10-23 stsp 	free(target_id);
187 13b2bc37 2022-10-23 stsp 	return err;
188 13b2bc37 2022-10-23 stsp }
189 13b2bc37 2022-10-23 stsp 
190 13b2bc37 2022-10-23 stsp static const struct got_error *
191 13b2bc37 2022-10-23 stsp send_peeled_tag_ref(struct got_reference *ref, struct got_object *obj,
192 13b2bc37 2022-10-23 stsp     struct imsgbuf *ibuf)
193 13b2bc37 2022-10-23 stsp {
194 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
195 13b2bc37 2022-10-23 stsp 	struct got_tag_object *tag;
196 13b2bc37 2022-10-23 stsp 	size_t namelen, len;
197 13b2bc37 2022-10-23 stsp 	char *peeled_refname = NULL;
198 13b2bc37 2022-10-23 stsp 	struct got_object_id *id;
199 13b2bc37 2022-10-23 stsp 	struct ibuf *wbuf;
200 13b2bc37 2022-10-23 stsp 
201 13b2bc37 2022-10-23 stsp 	err = got_object_tag_open(&tag, repo_read.repo, obj);
202 13b2bc37 2022-10-23 stsp 	if (err)
203 13b2bc37 2022-10-23 stsp 		return err;
204 13b2bc37 2022-10-23 stsp 
205 13b2bc37 2022-10-23 stsp 	if (asprintf(&peeled_refname, "%s^{}", got_ref_get_name(ref)) == -1) {
206 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("asprintf");
207 13b2bc37 2022-10-23 stsp 		goto done;
208 13b2bc37 2022-10-23 stsp 	}
209 13b2bc37 2022-10-23 stsp 
210 13b2bc37 2022-10-23 stsp 	id = got_object_tag_get_object_id(tag);
211 13b2bc37 2022-10-23 stsp 	namelen = strlen(peeled_refname);
212 13b2bc37 2022-10-23 stsp 
213 13b2bc37 2022-10-23 stsp 	len = sizeof(struct gotd_imsg_ref) + namelen;
214 13b2bc37 2022-10-23 stsp 	if (len > MAX_IMSGSIZE - IMSG_HEADER_SIZE) {
215 13b2bc37 2022-10-23 stsp 		err = got_error(GOT_ERR_NO_SPACE);
216 13b2bc37 2022-10-23 stsp 		goto done;
217 13b2bc37 2022-10-23 stsp 	}
218 13b2bc37 2022-10-23 stsp 
219 13b2bc37 2022-10-23 stsp 	wbuf = imsg_create(ibuf, GOTD_IMSG_REF, PROC_REPO_READ,
220 13b2bc37 2022-10-23 stsp 	    repo_read.pid, len);
221 13b2bc37 2022-10-23 stsp 	if (wbuf == NULL) {
222 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_create MREF");
223 13b2bc37 2022-10-23 stsp 		goto done;
224 13b2bc37 2022-10-23 stsp 	}
225 13b2bc37 2022-10-23 stsp 
226 13b2bc37 2022-10-23 stsp 	/* Keep in sync with struct gotd_imsg_ref definition. */
227 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, id->sha1, SHA1_DIGEST_LENGTH) == -1) {
228 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add REF");
229 13b2bc37 2022-10-23 stsp 		goto done;
230 13b2bc37 2022-10-23 stsp 	}
231 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, &namelen, sizeof(namelen)) == -1) {
232 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add REF");
233 13b2bc37 2022-10-23 stsp 		goto done;
234 13b2bc37 2022-10-23 stsp 	}
235 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, peeled_refname, namelen) == -1) {
236 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add REF");
237 13b2bc37 2022-10-23 stsp 		goto done;
238 13b2bc37 2022-10-23 stsp 	}
239 13b2bc37 2022-10-23 stsp 
240 13b2bc37 2022-10-23 stsp 	wbuf->fd = -1;
241 13b2bc37 2022-10-23 stsp 	imsg_close(ibuf, wbuf);
242 13b2bc37 2022-10-23 stsp done:
243 13b2bc37 2022-10-23 stsp 	got_object_tag_close(tag);
244 13b2bc37 2022-10-23 stsp 	return err;
245 13b2bc37 2022-10-23 stsp }
246 13b2bc37 2022-10-23 stsp 
247 13b2bc37 2022-10-23 stsp static const struct got_error *
248 13b2bc37 2022-10-23 stsp send_ref(struct got_reference *ref, struct imsgbuf *ibuf)
249 13b2bc37 2022-10-23 stsp {
250 13b2bc37 2022-10-23 stsp 	const struct got_error *err;
251 13b2bc37 2022-10-23 stsp 	const char *refname = got_ref_get_name(ref);
252 13b2bc37 2022-10-23 stsp 	size_t namelen;
253 13b2bc37 2022-10-23 stsp 	struct got_object_id *id = NULL;
254 13b2bc37 2022-10-23 stsp 	struct got_object *obj = NULL;
255 13b2bc37 2022-10-23 stsp 	size_t len;
256 13b2bc37 2022-10-23 stsp 	struct ibuf *wbuf;
257 13b2bc37 2022-10-23 stsp 
258 13b2bc37 2022-10-23 stsp 	namelen = strlen(refname);
259 13b2bc37 2022-10-23 stsp 
260 13b2bc37 2022-10-23 stsp 	len = sizeof(struct gotd_imsg_ref) + namelen;
261 13b2bc37 2022-10-23 stsp 	if (len > MAX_IMSGSIZE - IMSG_HEADER_SIZE)
262 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_NO_SPACE);
263 13b2bc37 2022-10-23 stsp 
264 13b2bc37 2022-10-23 stsp 	err = got_ref_resolve(&id, repo_read.repo, ref);
265 13b2bc37 2022-10-23 stsp 	if (err)
266 13b2bc37 2022-10-23 stsp 		return err;
267 13b2bc37 2022-10-23 stsp 
268 13b2bc37 2022-10-23 stsp 	wbuf = imsg_create(ibuf, GOTD_IMSG_REF, PROC_REPO_READ,
269 13b2bc37 2022-10-23 stsp 	    repo_read.pid, len);
270 13b2bc37 2022-10-23 stsp 	if (wbuf == NULL) {
271 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_create REF");
272 13b2bc37 2022-10-23 stsp 		goto done;
273 13b2bc37 2022-10-23 stsp 	}
274 13b2bc37 2022-10-23 stsp 
275 13b2bc37 2022-10-23 stsp 	/* Keep in sync with struct gotd_imsg_ref definition. */
276 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, id->sha1, SHA1_DIGEST_LENGTH) == -1)
277 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF");
278 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, &namelen, sizeof(namelen)) == -1)
279 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF");
280 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, refname, namelen) == -1)
281 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF");
282 13b2bc37 2022-10-23 stsp 
283 13b2bc37 2022-10-23 stsp 	wbuf->fd = -1;
284 13b2bc37 2022-10-23 stsp 	imsg_close(ibuf, wbuf);
285 13b2bc37 2022-10-23 stsp 
286 13b2bc37 2022-10-23 stsp 	err = got_object_open(&obj, repo_read.repo, id);
287 13b2bc37 2022-10-23 stsp 	if (err)
288 13b2bc37 2022-10-23 stsp 		goto done;
289 13b2bc37 2022-10-23 stsp 	if (obj->type == GOT_OBJ_TYPE_TAG)
290 13b2bc37 2022-10-23 stsp 		err = send_peeled_tag_ref(ref, obj, ibuf);
291 13b2bc37 2022-10-23 stsp done:
292 13b2bc37 2022-10-23 stsp 	if (obj)
293 13b2bc37 2022-10-23 stsp 		got_object_close(obj);
294 13b2bc37 2022-10-23 stsp 	free(id);
295 13b2bc37 2022-10-23 stsp 	return err;
296 13b2bc37 2022-10-23 stsp }
297 13b2bc37 2022-10-23 stsp 
298 13b2bc37 2022-10-23 stsp static const struct got_error *
299 13b2bc37 2022-10-23 stsp list_refs(struct repo_read_client **client, struct imsg *imsg)
300 13b2bc37 2022-10-23 stsp {
301 13b2bc37 2022-10-23 stsp 	const struct got_error *err;
302 13b2bc37 2022-10-23 stsp 	struct got_reflist_head refs;
303 13b2bc37 2022-10-23 stsp 	struct got_reflist_entry *re;
304 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_list_refs_internal ireq;
305 13b2bc37 2022-10-23 stsp 	size_t datalen;
306 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_reflist irefs;
307 13b2bc37 2022-10-23 stsp 	struct imsgbuf ibuf;
308 13b2bc37 2022-10-23 stsp 	int client_fd = imsg->fd;
309 13b2bc37 2022-10-23 stsp 
310 13b2bc37 2022-10-23 stsp 	TAILQ_INIT(&refs);
311 13b2bc37 2022-10-23 stsp 
312 13b2bc37 2022-10-23 stsp 	if (client_fd == -1)
313 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
314 13b2bc37 2022-10-23 stsp 
315 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
316 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq))
317 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
318 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, sizeof(ireq));
319 13b2bc37 2022-10-23 stsp 
320 13b2bc37 2022-10-23 stsp 	*client = find_client(ireq.client_id);
321 13b2bc37 2022-10-23 stsp 	if (*client)
322 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_CLIENT_ID, "duplicate client ID");
323 13b2bc37 2022-10-23 stsp 
324 13b2bc37 2022-10-23 stsp 	*client = calloc(1, sizeof(**client));
325 13b2bc37 2022-10-23 stsp 	if (*client == NULL)
326 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("calloc");
327 13b2bc37 2022-10-23 stsp 	add_client(*client, ireq.client_id, client_fd);
328 13b2bc37 2022-10-23 stsp 
329 13b2bc37 2022-10-23 stsp 	imsg_init(&ibuf, client_fd);
330 13b2bc37 2022-10-23 stsp 
331 13b2bc37 2022-10-23 stsp 	err = got_ref_list(&refs, repo_read.repo, "",
332 13b2bc37 2022-10-23 stsp 	    got_ref_cmp_by_name, NULL);
333 13b2bc37 2022-10-23 stsp 	if (err)
334 13b2bc37 2022-10-23 stsp 		return err;
335 13b2bc37 2022-10-23 stsp 
336 13b2bc37 2022-10-23 stsp 	memset(&irefs, 0, sizeof(irefs));
337 13b2bc37 2022-10-23 stsp 	TAILQ_FOREACH(re, &refs, entry) {
338 13b2bc37 2022-10-23 stsp 		struct got_object_id *id;
339 13b2bc37 2022-10-23 stsp 		int obj_type;
340 13b2bc37 2022-10-23 stsp 
341 13b2bc37 2022-10-23 stsp 		if (got_ref_is_symbolic(re->ref)) {
342 13b2bc37 2022-10-23 stsp 			const char *refname = got_ref_get_name(re->ref);
343 13b2bc37 2022-10-23 stsp 			if (strcmp(refname, GOT_REF_HEAD) == 0)
344 13b2bc37 2022-10-23 stsp 				irefs.nrefs++;
345 13b2bc37 2022-10-23 stsp 			continue;
346 13b2bc37 2022-10-23 stsp 		}
347 13b2bc37 2022-10-23 stsp 
348 13b2bc37 2022-10-23 stsp 		irefs.nrefs++;
349 13b2bc37 2022-10-23 stsp 
350 13b2bc37 2022-10-23 stsp 		/* Account for a peeled tag refs. */
351 13b2bc37 2022-10-23 stsp 		err = got_ref_resolve(&id, repo_read.repo, re->ref);
352 13b2bc37 2022-10-23 stsp 		if (err)
353 13b2bc37 2022-10-23 stsp 			goto done;
354 13b2bc37 2022-10-23 stsp 		err = got_object_get_type(&obj_type, repo_read.repo, id);	
355 13b2bc37 2022-10-23 stsp 		free(id);
356 13b2bc37 2022-10-23 stsp 		if (err)
357 13b2bc37 2022-10-23 stsp 			goto done;
358 13b2bc37 2022-10-23 stsp 		if (obj_type == GOT_OBJ_TYPE_TAG)
359 13b2bc37 2022-10-23 stsp 			irefs.nrefs++;
360 13b2bc37 2022-10-23 stsp 	}
361 13b2bc37 2022-10-23 stsp 
362 13b2bc37 2022-10-23 stsp 	if (imsg_compose(&ibuf, GOTD_IMSG_REFLIST, PROC_REPO_READ,
363 13b2bc37 2022-10-23 stsp 	    repo_read.pid, -1, &irefs, sizeof(irefs)) == -1) {
364 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_compose REFLIST");
365 13b2bc37 2022-10-23 stsp 		goto done;
366 13b2bc37 2022-10-23 stsp 	}
367 13b2bc37 2022-10-23 stsp 
368 13b2bc37 2022-10-23 stsp 	/*
369 13b2bc37 2022-10-23 stsp 	 * Send the HEAD symref first. In Git-protocol versions < 2
370 13b2bc37 2022-10-23 stsp 	 * the HEAD symref must be announced on the initial line of
371 13b2bc37 2022-10-23 stsp 	 * the server's ref advertisement.
372 13b2bc37 2022-10-23 stsp 	 * For now, we do not advertise symrefs other than HEAD.
373 13b2bc37 2022-10-23 stsp 	 */
374 13b2bc37 2022-10-23 stsp 	TAILQ_FOREACH(re, &refs, entry) {
375 13b2bc37 2022-10-23 stsp 		if (!got_ref_is_symbolic(re->ref) ||
376 13b2bc37 2022-10-23 stsp 		    strcmp(got_ref_get_name(re->ref), GOT_REF_HEAD) != 0)
377 13b2bc37 2022-10-23 stsp 			continue;
378 13b2bc37 2022-10-23 stsp 		err = send_symref(re->ref, &ibuf);
379 13b2bc37 2022-10-23 stsp 		if (err)
380 13b2bc37 2022-10-23 stsp 			goto done;
381 13b2bc37 2022-10-23 stsp 		break;
382 13b2bc37 2022-10-23 stsp 	}
383 13b2bc37 2022-10-23 stsp 	TAILQ_FOREACH(re, &refs, entry) {
384 13b2bc37 2022-10-23 stsp 		if (got_ref_is_symbolic(re->ref))
385 13b2bc37 2022-10-23 stsp 			continue;
386 13b2bc37 2022-10-23 stsp 		err = send_ref(re->ref, &ibuf);
387 13b2bc37 2022-10-23 stsp 		if (err)
388 13b2bc37 2022-10-23 stsp 			goto done;
389 13b2bc37 2022-10-23 stsp 	}
390 13b2bc37 2022-10-23 stsp 
391 13b2bc37 2022-10-23 stsp 	err = gotd_imsg_flush(&ibuf);
392 13b2bc37 2022-10-23 stsp done:
393 13b2bc37 2022-10-23 stsp 	got_ref_list_free(&refs);
394 13b2bc37 2022-10-23 stsp 	imsg_clear(&ibuf);
395 13b2bc37 2022-10-23 stsp 	return err;
396 13b2bc37 2022-10-23 stsp }
397 13b2bc37 2022-10-23 stsp 
398 13b2bc37 2022-10-23 stsp static const struct got_error *
399 13b2bc37 2022-10-23 stsp record_object_id(struct gotd_object_id_array *array, struct got_object_id *id)
400 13b2bc37 2022-10-23 stsp {
401 13b2bc37 2022-10-23 stsp 	const size_t alloc_chunksz = 256;
402 13b2bc37 2022-10-23 stsp 
403 13b2bc37 2022-10-23 stsp 	if (array->ids == NULL) {
404 13b2bc37 2022-10-23 stsp 		array->ids = reallocarray(NULL, alloc_chunksz,
405 13b2bc37 2022-10-23 stsp 		    sizeof(*array->ids));
406 13b2bc37 2022-10-23 stsp 		if (array->ids == NULL)
407 13b2bc37 2022-10-23 stsp 			return got_error_from_errno("reallocarray");
408 13b2bc37 2022-10-23 stsp 		array->nalloc = alloc_chunksz;
409 13b2bc37 2022-10-23 stsp 		array->nids = 0;
410 13b2bc37 2022-10-23 stsp 	} else if (array->nalloc <= array->nids) {
411 13b2bc37 2022-10-23 stsp 		struct got_object_id **new;
412 13b2bc37 2022-10-23 stsp 		new = recallocarray(array->ids, array->nalloc,
413 13b2bc37 2022-10-23 stsp 		    array->nalloc + alloc_chunksz, sizeof(*new));
414 13b2bc37 2022-10-23 stsp 		if (new == NULL)
415 13b2bc37 2022-10-23 stsp 			return got_error_from_errno("recallocarray");
416 13b2bc37 2022-10-23 stsp 		array->ids = new;
417 13b2bc37 2022-10-23 stsp 		array->nalloc += alloc_chunksz;
418 13b2bc37 2022-10-23 stsp 	}
419 13b2bc37 2022-10-23 stsp 
420 13b2bc37 2022-10-23 stsp 	array->ids[array->nids] = got_object_id_dup(id);
421 13b2bc37 2022-10-23 stsp 	if (array->ids[array->nids] == NULL)
422 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("got_object_id_dup");
423 13b2bc37 2022-10-23 stsp 	array->nids++;
424 13b2bc37 2022-10-23 stsp 	return NULL;
425 13b2bc37 2022-10-23 stsp }
426 13b2bc37 2022-10-23 stsp 
427 13b2bc37 2022-10-23 stsp static void
428 13b2bc37 2022-10-23 stsp free_object_ids(struct gotd_object_id_array *array)
429 13b2bc37 2022-10-23 stsp {
430 13b2bc37 2022-10-23 stsp 	size_t i;
431 13b2bc37 2022-10-23 stsp 
432 13b2bc37 2022-10-23 stsp 	for (i = 0; i < array->nids; i++)
433 13b2bc37 2022-10-23 stsp 		free(array->ids[i]);
434 13b2bc37 2022-10-23 stsp 	free(array->ids);
435 13b2bc37 2022-10-23 stsp 
436 13b2bc37 2022-10-23 stsp 	array->ids = NULL;
437 13b2bc37 2022-10-23 stsp 	array->nalloc = 0;
438 13b2bc37 2022-10-23 stsp 	array->nids = 0;
439 13b2bc37 2022-10-23 stsp }
440 13b2bc37 2022-10-23 stsp 
441 13b2bc37 2022-10-23 stsp static const struct got_error *
442 13b2bc37 2022-10-23 stsp recv_want(struct repo_read_client **client, struct imsg *imsg)
443 13b2bc37 2022-10-23 stsp {
444 13b2bc37 2022-10-23 stsp 	const struct got_error *err;
445 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_want iwant;
446 13b2bc37 2022-10-23 stsp 	size_t datalen;
447 13b2bc37 2022-10-23 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
448 13b2bc37 2022-10-23 stsp 	struct got_object_id id;
449 13b2bc37 2022-10-23 stsp 	int obj_type;
450 13b2bc37 2022-10-23 stsp 	struct imsgbuf ibuf;
451 13b2bc37 2022-10-23 stsp 
452 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
453 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(iwant))
454 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
455 13b2bc37 2022-10-23 stsp 	memcpy(&iwant, imsg->data, sizeof(iwant));
456 13b2bc37 2022-10-23 stsp 
457 13b2bc37 2022-10-23 stsp 	memset(&id, 0, sizeof(id));
458 13b2bc37 2022-10-23 stsp 	memcpy(id.sha1, iwant.object_id, SHA1_DIGEST_LENGTH);
459 13b2bc37 2022-10-23 stsp 
460 13b2bc37 2022-10-23 stsp 	if (log_getverbose() > 0 &&
461 13b2bc37 2022-10-23 stsp 	    got_sha1_digest_to_str(id.sha1, hex, sizeof(hex)))
462 13b2bc37 2022-10-23 stsp 		log_debug("client wants %s", hex);
463 13b2bc37 2022-10-23 stsp 
464 13b2bc37 2022-10-23 stsp 	*client = find_client(iwant.client_id);
465 13b2bc37 2022-10-23 stsp 	if (*client == NULL)
466 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_CLIENT_ID);
467 13b2bc37 2022-10-23 stsp 
468 13b2bc37 2022-10-23 stsp 	imsg_init(&ibuf, (*client)->fd);
469 13b2bc37 2022-10-23 stsp 
470 13b2bc37 2022-10-23 stsp 	err = got_object_get_type(&obj_type, repo_read.repo, &id);
471 13b2bc37 2022-10-23 stsp 	if (err)
472 13b2bc37 2022-10-23 stsp 		return err;
473 13b2bc37 2022-10-23 stsp 
474 13b2bc37 2022-10-23 stsp 	if (obj_type != GOT_OBJ_TYPE_COMMIT &&
475 13b2bc37 2022-10-23 stsp 	    obj_type != GOT_OBJ_TYPE_TAG)
476 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_OBJ_TYPE);
477 13b2bc37 2022-10-23 stsp 
478 13b2bc37 2022-10-23 stsp 	err = record_object_id(&(*client)->want_ids, &id);
479 13b2bc37 2022-10-23 stsp 	if (err)
480 13b2bc37 2022-10-23 stsp 		return err;
481 13b2bc37 2022-10-23 stsp 
482 13b2bc37 2022-10-23 stsp 	gotd_imsg_send_ack(&id, &ibuf, PROC_REPO_READ, repo_read.pid);
483 13b2bc37 2022-10-23 stsp 	imsg_clear(&ibuf);
484 13b2bc37 2022-10-23 stsp 	return err;
485 13b2bc37 2022-10-23 stsp }
486 13b2bc37 2022-10-23 stsp 
487 13b2bc37 2022-10-23 stsp static const struct got_error *
488 13b2bc37 2022-10-23 stsp recv_have(struct repo_read_client **client, struct imsg *imsg)
489 13b2bc37 2022-10-23 stsp {
490 13b2bc37 2022-10-23 stsp 	const struct got_error *err;
491 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_have ihave;
492 13b2bc37 2022-10-23 stsp 	size_t datalen;
493 13b2bc37 2022-10-23 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
494 13b2bc37 2022-10-23 stsp 	struct got_object_id id;
495 13b2bc37 2022-10-23 stsp 	int obj_type;
496 13b2bc37 2022-10-23 stsp 	struct imsgbuf ibuf;
497 13b2bc37 2022-10-23 stsp 
498 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
499 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ihave))
500 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
501 13b2bc37 2022-10-23 stsp 	memcpy(&ihave, imsg->data, sizeof(ihave));
502 13b2bc37 2022-10-23 stsp 
503 13b2bc37 2022-10-23 stsp 	memset(&id, 0, sizeof(id));
504 13b2bc37 2022-10-23 stsp 	memcpy(id.sha1, ihave.object_id, SHA1_DIGEST_LENGTH);
505 13b2bc37 2022-10-23 stsp 
506 13b2bc37 2022-10-23 stsp 	if (log_getverbose() > 0 &&
507 13b2bc37 2022-10-23 stsp 	    got_sha1_digest_to_str(id.sha1, hex, sizeof(hex)))
508 13b2bc37 2022-10-23 stsp 		log_debug("client has %s", hex);
509 13b2bc37 2022-10-23 stsp 
510 13b2bc37 2022-10-23 stsp 	*client = find_client(ihave.client_id);
511 13b2bc37 2022-10-23 stsp 	if (*client == NULL)
512 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_CLIENT_ID);
513 13b2bc37 2022-10-23 stsp 
514 13b2bc37 2022-10-23 stsp 	imsg_init(&ibuf, (*client)->fd);
515 13b2bc37 2022-10-23 stsp 
516 13b2bc37 2022-10-23 stsp 	err = got_object_get_type(&obj_type, repo_read.repo, &id);
517 13b2bc37 2022-10-23 stsp 	if (err) {
518 13b2bc37 2022-10-23 stsp 		if (err->code == GOT_ERR_NO_OBJ) {
519 13b2bc37 2022-10-23 stsp 			gotd_imsg_send_nak(&id, &ibuf,
520 13b2bc37 2022-10-23 stsp 			    PROC_REPO_READ, repo_read.pid);
521 13b2bc37 2022-10-23 stsp 			err = NULL;
522 13b2bc37 2022-10-23 stsp 		}
523 13b2bc37 2022-10-23 stsp 		goto done;
524 13b2bc37 2022-10-23 stsp 	}
525 13b2bc37 2022-10-23 stsp 
526 13b2bc37 2022-10-23 stsp 	if (obj_type != GOT_OBJ_TYPE_COMMIT &&
527 13b2bc37 2022-10-23 stsp 	    obj_type != GOT_OBJ_TYPE_TAG) {
528 13b2bc37 2022-10-23 stsp 		gotd_imsg_send_nak(&id, &ibuf, PROC_REPO_READ, repo_read.pid);
529 13b2bc37 2022-10-23 stsp 		err = got_error(GOT_ERR_OBJ_TYPE);
530 13b2bc37 2022-10-23 stsp 		goto done;
531 13b2bc37 2022-10-23 stsp 	}
532 13b2bc37 2022-10-23 stsp 
533 13b2bc37 2022-10-23 stsp 	err = record_object_id(&(*client)->have_ids, &id);
534 13b2bc37 2022-10-23 stsp 	if (err)
535 13b2bc37 2022-10-23 stsp 		return err;
536 13b2bc37 2022-10-23 stsp 
537 13b2bc37 2022-10-23 stsp 	gotd_imsg_send_ack(&id, &ibuf, PROC_REPO_READ, repo_read.pid);
538 13b2bc37 2022-10-23 stsp done:
539 13b2bc37 2022-10-23 stsp 	imsg_clear(&ibuf);
540 13b2bc37 2022-10-23 stsp 	return err;
541 13b2bc37 2022-10-23 stsp }
542 13b2bc37 2022-10-23 stsp 
543 13b2bc37 2022-10-23 stsp struct repo_read_pack_progress_arg {
544 13b2bc37 2022-10-23 stsp 	int report_progress;
545 13b2bc37 2022-10-23 stsp 	struct imsgbuf *ibuf;
546 13b2bc37 2022-10-23 stsp 	int sent_ready;
547 13b2bc37 2022-10-23 stsp };
548 13b2bc37 2022-10-23 stsp 
549 13b2bc37 2022-10-23 stsp static const struct got_error *
550 13b2bc37 2022-10-23 stsp pack_progress(void *arg, int ncolored, int nfound, int ntrees,
551 13b2bc37 2022-10-23 stsp     off_t packfile_size, int ncommits, int nobj_total, int nobj_deltify,
552 13b2bc37 2022-10-23 stsp     int nobj_written)
553 13b2bc37 2022-10-23 stsp {
554 13b2bc37 2022-10-23 stsp 	struct repo_read_pack_progress_arg *a = arg;
555 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_progress iprog;
556 13b2bc37 2022-10-23 stsp 	int ret;
557 13b2bc37 2022-10-23 stsp 
558 13b2bc37 2022-10-23 stsp 	if (!a->report_progress)
559 13b2bc37 2022-10-23 stsp 		return NULL;
560 13b2bc37 2022-10-23 stsp 	if (packfile_size > 0 && a->sent_ready)
561 13b2bc37 2022-10-23 stsp 		return NULL;
562 13b2bc37 2022-10-23 stsp 
563 13b2bc37 2022-10-23 stsp 	memset(&iprog, 0, sizeof(iprog));
564 13b2bc37 2022-10-23 stsp 	iprog.ncolored = ncolored;
565 13b2bc37 2022-10-23 stsp 	iprog.nfound = nfound;
566 13b2bc37 2022-10-23 stsp 	iprog.ntrees = ntrees;
567 13b2bc37 2022-10-23 stsp 	iprog.packfile_size = packfile_size;
568 13b2bc37 2022-10-23 stsp 	iprog.ncommits = ncommits;
569 13b2bc37 2022-10-23 stsp 	iprog.nobj_total = nobj_total;
570 13b2bc37 2022-10-23 stsp 	iprog.nobj_deltify = nobj_deltify;
571 13b2bc37 2022-10-23 stsp 	iprog.nobj_written = nobj_written;
572 13b2bc37 2022-10-23 stsp 
573 13b2bc37 2022-10-23 stsp 	/* Using synchronous writes since we are blocking the event loop. */
574 13b2bc37 2022-10-23 stsp 	if (packfile_size == 0) {
575 13b2bc37 2022-10-23 stsp 		ret = imsg_compose(a->ibuf, GOTD_IMSG_PACKFILE_PROGRESS,
576 13b2bc37 2022-10-23 stsp 		    PROC_REPO_READ, repo_read.pid, -1, &iprog, sizeof(iprog));
577 13b2bc37 2022-10-23 stsp 		if (ret == -1) {
578 13b2bc37 2022-10-23 stsp 			return got_error_from_errno("imsg compose "
579 13b2bc37 2022-10-23 stsp 			    "PACKFILE_PROGRESS");
580 13b2bc37 2022-10-23 stsp 		}	
581 13b2bc37 2022-10-23 stsp 	} else {
582 13b2bc37 2022-10-23 stsp 		a->sent_ready = 1;
583 13b2bc37 2022-10-23 stsp 		ret = imsg_compose(a->ibuf, GOTD_IMSG_PACKFILE_READY,
584 13b2bc37 2022-10-23 stsp 		    PROC_REPO_READ, repo_read.pid, -1, &iprog, sizeof(iprog));
585 13b2bc37 2022-10-23 stsp 		if (ret == -1) {
586 13b2bc37 2022-10-23 stsp 			return got_error_from_errno("imsg compose "
587 13b2bc37 2022-10-23 stsp 			    "PACKFILE_READY");
588 13b2bc37 2022-10-23 stsp 		}
589 13b2bc37 2022-10-23 stsp 	}
590 13b2bc37 2022-10-23 stsp 
591 13b2bc37 2022-10-23 stsp 	return gotd_imsg_flush(a->ibuf);
592 13b2bc37 2022-10-23 stsp }
593 13b2bc37 2022-10-23 stsp 
594 13b2bc37 2022-10-23 stsp static const struct got_error *
595 13b2bc37 2022-10-23 stsp receive_delta_cache_fd(struct repo_read_client **client, struct imsg *imsg,
596 13b2bc37 2022-10-23 stsp     struct gotd_imsgev *iev)
597 13b2bc37 2022-10-23 stsp {
598 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_send_packfile ireq;
599 13b2bc37 2022-10-23 stsp 	size_t datalen;
600 13b2bc37 2022-10-23 stsp 
601 13b2bc37 2022-10-23 stsp 	log_debug("receving delta cache file");
602 13b2bc37 2022-10-23 stsp 
603 13b2bc37 2022-10-23 stsp 	if (imsg->fd == -1)
604 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
605 13b2bc37 2022-10-23 stsp 
606 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
607 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq))
608 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
609 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, sizeof(ireq));
610 13b2bc37 2022-10-23 stsp 
611 13b2bc37 2022-10-23 stsp 	*client = find_client(ireq.client_id);
612 13b2bc37 2022-10-23 stsp 	if (*client == NULL)
613 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_CLIENT_ID);
614 13b2bc37 2022-10-23 stsp 
615 13b2bc37 2022-10-23 stsp 	if ((*client)->delta_cache_fd != -1)
616 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
617 13b2bc37 2022-10-23 stsp 
618 13b2bc37 2022-10-23 stsp 	(*client)->delta_cache_fd = imsg->fd;
619 13b2bc37 2022-10-23 stsp 	(*client)->report_progress = ireq.report_progress;
620 13b2bc37 2022-10-23 stsp 	return NULL;
621 13b2bc37 2022-10-23 stsp }
622 13b2bc37 2022-10-23 stsp 
623 13b2bc37 2022-10-23 stsp static const struct got_error *
624 13b2bc37 2022-10-23 stsp receive_pack_pipe(struct repo_read_client **client, struct imsg *imsg,
625 13b2bc37 2022-10-23 stsp     struct gotd_imsgev *iev)
626 13b2bc37 2022-10-23 stsp {
627 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_pipe ireq;
628 13b2bc37 2022-10-23 stsp 	size_t datalen;
629 13b2bc37 2022-10-23 stsp 
630 13b2bc37 2022-10-23 stsp 	log_debug("receving pack pipe descriptor");
631 13b2bc37 2022-10-23 stsp 
632 13b2bc37 2022-10-23 stsp 	if (imsg->fd == -1)
633 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
634 13b2bc37 2022-10-23 stsp 
635 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
636 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq))
637 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
638 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, sizeof(ireq));
639 13b2bc37 2022-10-23 stsp 
640 13b2bc37 2022-10-23 stsp 	*client = find_client(ireq.client_id);
641 13b2bc37 2022-10-23 stsp 	if (*client == NULL)
642 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_CLIENT_ID);
643 86769de8 2022-10-28 stsp 	if ((*client)->pack_pipe != -1)
644 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
645 13b2bc37 2022-10-23 stsp 
646 86769de8 2022-10-28 stsp 	(*client)->pack_pipe = imsg->fd;
647 13b2bc37 2022-10-23 stsp 	return NULL;
648 13b2bc37 2022-10-23 stsp }
649 13b2bc37 2022-10-23 stsp 
650 13b2bc37 2022-10-23 stsp static const struct got_error *
651 13b2bc37 2022-10-23 stsp send_packfile(struct repo_read_client *client, struct imsg *imsg,
652 13b2bc37 2022-10-23 stsp     struct gotd_imsgev *iev)
653 13b2bc37 2022-10-23 stsp {
654 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
655 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_done idone;
656 13b2bc37 2022-10-23 stsp 	uint8_t packsha1[SHA1_DIGEST_LENGTH];
657 13b2bc37 2022-10-23 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
658 13b2bc37 2022-10-23 stsp 	FILE *delta_cache = NULL;
659 13b2bc37 2022-10-23 stsp 	struct imsgbuf ibuf;
660 13b2bc37 2022-10-23 stsp 	struct repo_read_pack_progress_arg pa;
661 13b2bc37 2022-10-23 stsp 	struct got_ratelimit rl;
662 13b2bc37 2022-10-23 stsp 
663 13b2bc37 2022-10-23 stsp 	log_debug("packfile request received");
664 13b2bc37 2022-10-23 stsp 
665 13b2bc37 2022-10-23 stsp 	got_ratelimit_init(&rl, 2, 0);
666 13b2bc37 2022-10-23 stsp 
667 86769de8 2022-10-28 stsp 	if (client->delta_cache_fd == -1 || client->pack_pipe == -1)
668 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
669 13b2bc37 2022-10-23 stsp 
670 13b2bc37 2022-10-23 stsp 	imsg_init(&ibuf, client->fd);
671 13b2bc37 2022-10-23 stsp 
672 13b2bc37 2022-10-23 stsp 	delta_cache = fdopen(client->delta_cache_fd, "w+");
673 13b2bc37 2022-10-23 stsp 	if (delta_cache == NULL) {
674 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("fdopen");
675 13b2bc37 2022-10-23 stsp 		goto done;
676 13b2bc37 2022-10-23 stsp 	}
677 13b2bc37 2022-10-23 stsp 	client->delta_cache_fd = -1;
678 13b2bc37 2022-10-23 stsp 
679 13b2bc37 2022-10-23 stsp 	memset(&pa, 0, sizeof(pa));
680 13b2bc37 2022-10-23 stsp 	pa.ibuf = &ibuf;
681 13b2bc37 2022-10-23 stsp 	pa.report_progress = client->report_progress;
682 13b2bc37 2022-10-23 stsp 
683 86769de8 2022-10-28 stsp 	err = got_pack_create(packsha1, client->pack_pipe, delta_cache,
684 13b2bc37 2022-10-23 stsp 	    client->have_ids.ids, client->have_ids.nids,
685 13b2bc37 2022-10-23 stsp 	    client->want_ids.ids, client->want_ids.nids,
686 13b2bc37 2022-10-23 stsp 	    repo_read.repo, 0, 1, pack_progress, &pa, &rl,
687 13b2bc37 2022-10-23 stsp 	    check_cancelled, NULL);
688 13b2bc37 2022-10-23 stsp 	if (err)
689 13b2bc37 2022-10-23 stsp 		goto done;
690 13b2bc37 2022-10-23 stsp 	
691 13b2bc37 2022-10-23 stsp 	if (log_getverbose() > 0 &&
692 13b2bc37 2022-10-23 stsp 	    got_sha1_digest_to_str(packsha1, hex, sizeof(hex)))
693 13b2bc37 2022-10-23 stsp 		log_debug("sent pack-%s.pack", hex);
694 13b2bc37 2022-10-23 stsp 
695 13b2bc37 2022-10-23 stsp 	memset(&idone, 0, sizeof(idone));
696 13b2bc37 2022-10-23 stsp 	idone.client_id = client->id;
697 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(iev, GOTD_IMSG_PACKFILE_DONE,
698 13b2bc37 2022-10-23 stsp 	    PROC_REPO_READ, -1, &idone, sizeof(idone)) == -1)
699 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose PACKFILE_DONE");
700 13b2bc37 2022-10-23 stsp done:
701 13b2bc37 2022-10-23 stsp 	if (delta_cache != NULL && fclose(delta_cache) == EOF && err == NULL)
702 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("fclose");
703 13b2bc37 2022-10-23 stsp 	imsg_clear(&ibuf);
704 13b2bc37 2022-10-23 stsp 	return err;
705 13b2bc37 2022-10-23 stsp }
706 13b2bc37 2022-10-23 stsp 
707 13b2bc37 2022-10-23 stsp static const struct got_error *
708 13b2bc37 2022-10-23 stsp recv_disconnect(struct imsg *imsg)
709 13b2bc37 2022-10-23 stsp {
710 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
711 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_disconnect idisconnect;
712 13b2bc37 2022-10-23 stsp 	size_t datalen;
713 86769de8 2022-10-28 stsp 	int client_fd, delta_cache_fd, pack_pipe;
714 13b2bc37 2022-10-23 stsp 	struct repo_read_client *client = NULL;
715 13b2bc37 2022-10-23 stsp 	uint64_t slot;
716 13b2bc37 2022-10-23 stsp 
717 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
718 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(idisconnect))
719 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
720 13b2bc37 2022-10-23 stsp 	memcpy(&idisconnect, imsg->data, sizeof(idisconnect));
721 13b2bc37 2022-10-23 stsp 
722 13b2bc37 2022-10-23 stsp 	log_debug("client disconnecting");
723 13b2bc37 2022-10-23 stsp 
724 13b2bc37 2022-10-23 stsp 	client = find_client(idisconnect.client_id);
725 13b2bc37 2022-10-23 stsp 	if (client == NULL)
726 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_CLIENT_ID);
727 13b2bc37 2022-10-23 stsp 
728 13b2bc37 2022-10-23 stsp 	slot = client_hash(client->id) % nitems(repo_read_clients);
729 13b2bc37 2022-10-23 stsp 	STAILQ_REMOVE(&repo_read_clients[slot], client, repo_read_client,
730 13b2bc37 2022-10-23 stsp 	    entry);
731 13b2bc37 2022-10-23 stsp 	free_object_ids(&client->have_ids);
732 13b2bc37 2022-10-23 stsp 	free_object_ids(&client->want_ids);
733 13b2bc37 2022-10-23 stsp 	client_fd = client->fd;
734 13b2bc37 2022-10-23 stsp 	delta_cache_fd = client->delta_cache_fd;
735 86769de8 2022-10-28 stsp 	pack_pipe = client->pack_pipe;
736 13b2bc37 2022-10-23 stsp 	free(client);
737 13b2bc37 2022-10-23 stsp 	if (close(client_fd) == -1)
738 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("close");
739 13b2bc37 2022-10-23 stsp 	if (delta_cache_fd != -1 && close(delta_cache_fd) == -1 && err == NULL)
740 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("close");
741 86769de8 2022-10-28 stsp 	if (pack_pipe != -1 && close(pack_pipe) == -1 && err == NULL)
742 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("close");
743 13b2bc37 2022-10-23 stsp 	return err;
744 13b2bc37 2022-10-23 stsp }
745 13b2bc37 2022-10-23 stsp 
746 13b2bc37 2022-10-23 stsp static void
747 13b2bc37 2022-10-23 stsp repo_read_dispatch(int fd, short event, void *arg)
748 13b2bc37 2022-10-23 stsp {
749 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
750 13b2bc37 2022-10-23 stsp 	struct gotd_imsgev *iev = arg;
751 13b2bc37 2022-10-23 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
752 13b2bc37 2022-10-23 stsp 	struct imsg imsg;
753 13b2bc37 2022-10-23 stsp 	ssize_t n;
754 13b2bc37 2022-10-23 stsp 	int shut = 0;
755 13b2bc37 2022-10-23 stsp 	struct repo_read_client *client = NULL;
756 13b2bc37 2022-10-23 stsp 
757 13b2bc37 2022-10-23 stsp 	if (event & EV_READ) {
758 13b2bc37 2022-10-23 stsp 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
759 13b2bc37 2022-10-23 stsp 			fatal("imsg_read error");
760 13b2bc37 2022-10-23 stsp 		if (n == 0)	/* Connection closed. */
761 13b2bc37 2022-10-23 stsp 			shut = 1;
762 13b2bc37 2022-10-23 stsp 	}
763 13b2bc37 2022-10-23 stsp 
764 13b2bc37 2022-10-23 stsp 	if (event & EV_WRITE) {
765 13b2bc37 2022-10-23 stsp 		n = msgbuf_write(&ibuf->w);
766 13b2bc37 2022-10-23 stsp 		if (n == -1 && errno != EAGAIN)
767 13b2bc37 2022-10-23 stsp 			fatal("msgbuf_write");
768 13b2bc37 2022-10-23 stsp 		if (n == 0)	/* Connection closed. */
769 13b2bc37 2022-10-23 stsp 			shut = 1;
770 13b2bc37 2022-10-23 stsp 	}
771 13b2bc37 2022-10-23 stsp 
772 13b2bc37 2022-10-23 stsp 	while (err == NULL && check_cancelled(NULL) == NULL) {
773 13b2bc37 2022-10-23 stsp 		client = NULL;
774 13b2bc37 2022-10-23 stsp 		if ((n = imsg_get(ibuf, &imsg)) == -1)
775 13b2bc37 2022-10-23 stsp 			fatal("%s: imsg_get", __func__);
776 13b2bc37 2022-10-23 stsp 		if (n == 0)	/* No more messages. */
777 13b2bc37 2022-10-23 stsp 			break;
778 13b2bc37 2022-10-23 stsp 
779 13b2bc37 2022-10-23 stsp 		switch (imsg.hdr.type) {
780 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_LIST_REFS_INTERNAL:
781 13b2bc37 2022-10-23 stsp 			err = list_refs(&client, &imsg);
782 13b2bc37 2022-10-23 stsp 			if (err)
783 13b2bc37 2022-10-23 stsp 				log_warnx("%s: ls-refs: %s", repo_read.title,
784 13b2bc37 2022-10-23 stsp 				    err->msg);
785 13b2bc37 2022-10-23 stsp 			break;
786 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_WANT:
787 13b2bc37 2022-10-23 stsp 			err = recv_want(&client, &imsg);
788 13b2bc37 2022-10-23 stsp 			if (err)
789 13b2bc37 2022-10-23 stsp 				log_warnx("%s: want-line: %s", repo_read.title,
790 13b2bc37 2022-10-23 stsp 				    err->msg);
791 13b2bc37 2022-10-23 stsp 			break;
792 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_HAVE:
793 13b2bc37 2022-10-23 stsp 			err = recv_have(&client, &imsg);
794 13b2bc37 2022-10-23 stsp 			if (err)
795 13b2bc37 2022-10-23 stsp 				log_warnx("%s: have-line: %s", repo_read.title,
796 13b2bc37 2022-10-23 stsp 				    err->msg);
797 13b2bc37 2022-10-23 stsp 			break;
798 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_SEND_PACKFILE:
799 13b2bc37 2022-10-23 stsp 			err = receive_delta_cache_fd(&client, &imsg, iev);
800 13b2bc37 2022-10-23 stsp 			if (err)
801 13b2bc37 2022-10-23 stsp 				log_warnx("%s: receiving delta cache: %s",
802 13b2bc37 2022-10-23 stsp 				    repo_read.title, err->msg);
803 13b2bc37 2022-10-23 stsp 			break;
804 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_PACKFILE_PIPE:
805 13b2bc37 2022-10-23 stsp 			err = receive_pack_pipe(&client, &imsg, iev);
806 13b2bc37 2022-10-23 stsp 			if (err) {
807 13b2bc37 2022-10-23 stsp 				log_warnx("%s: receiving pack pipe: %s",
808 13b2bc37 2022-10-23 stsp 				    repo_read.title, err->msg);
809 13b2bc37 2022-10-23 stsp 				break;
810 13b2bc37 2022-10-23 stsp 			}
811 86769de8 2022-10-28 stsp 			if (client->pack_pipe == -1)
812 13b2bc37 2022-10-23 stsp 				break;
813 13b2bc37 2022-10-23 stsp 			err = send_packfile(client, &imsg, iev);
814 13b2bc37 2022-10-23 stsp 			if (err)
815 13b2bc37 2022-10-23 stsp 				log_warnx("%s: sending packfile: %s",
816 13b2bc37 2022-10-23 stsp 				    repo_read.title, err->msg);
817 13b2bc37 2022-10-23 stsp 			break;
818 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_DISCONNECT:
819 13b2bc37 2022-10-23 stsp 			err = recv_disconnect(&imsg);
820 13b2bc37 2022-10-23 stsp 			if (err)
821 13b2bc37 2022-10-23 stsp 				log_warnx("%s: disconnect: %s",
822 13b2bc37 2022-10-23 stsp 				    repo_read.title, err->msg);
823 13b2bc37 2022-10-23 stsp 			break;
824 13b2bc37 2022-10-23 stsp 		default:
825 13b2bc37 2022-10-23 stsp 			log_debug("%s: unexpected imsg %d", repo_read.title,
826 13b2bc37 2022-10-23 stsp 			    imsg.hdr.type);
827 13b2bc37 2022-10-23 stsp 			break;
828 13b2bc37 2022-10-23 stsp 		}
829 13b2bc37 2022-10-23 stsp 
830 13b2bc37 2022-10-23 stsp 		imsg_free(&imsg);
831 13b2bc37 2022-10-23 stsp 	}
832 13b2bc37 2022-10-23 stsp 
833 13b2bc37 2022-10-23 stsp 	if (!shut && check_cancelled(NULL) == NULL) {
834 13b2bc37 2022-10-23 stsp 		if (err &&
835 13b2bc37 2022-10-23 stsp 		    gotd_imsg_send_error_event(iev, PROC_REPO_READ,
836 13b2bc37 2022-10-23 stsp 		        client ? client->id : 0, err) == -1) {
837 13b2bc37 2022-10-23 stsp 			log_warnx("could not send error to parent: %s",
838 13b2bc37 2022-10-23 stsp 			    err->msg);
839 13b2bc37 2022-10-23 stsp 		}
840 13b2bc37 2022-10-23 stsp 		gotd_imsg_event_add(iev);
841 13b2bc37 2022-10-23 stsp 	} else {
842 13b2bc37 2022-10-23 stsp 		/* This pipe is dead. Remove its event handler */
843 13b2bc37 2022-10-23 stsp 		event_del(&iev->ev);
844 13b2bc37 2022-10-23 stsp 		event_loopexit(NULL);
845 13b2bc37 2022-10-23 stsp 	}
846 13b2bc37 2022-10-23 stsp }
847 13b2bc37 2022-10-23 stsp 
848 13b2bc37 2022-10-23 stsp void
849 13b2bc37 2022-10-23 stsp repo_read_main(const char *title, int *pack_fds, int *temp_fds)
850 13b2bc37 2022-10-23 stsp {
851 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
852 13b2bc37 2022-10-23 stsp 	struct gotd_imsgev iev;
853 13b2bc37 2022-10-23 stsp 
854 13b2bc37 2022-10-23 stsp 	repo_read.title = title;
855 13b2bc37 2022-10-23 stsp 	repo_read.pid = getpid();
856 13b2bc37 2022-10-23 stsp 	repo_read.pack_fds = pack_fds;
857 13b2bc37 2022-10-23 stsp 	repo_read.temp_fds = temp_fds;
858 13b2bc37 2022-10-23 stsp 
859 13b2bc37 2022-10-23 stsp 	arc4random_buf(&clients_hash_key, sizeof(clients_hash_key));
860 13b2bc37 2022-10-23 stsp 
861 13b2bc37 2022-10-23 stsp 	/*
862 13b2bc37 2022-10-23 stsp 	 * Open a repository in the root directory.
863 13b2bc37 2022-10-23 stsp 	 * We are already in chroot at this point.
864 13b2bc37 2022-10-23 stsp 	 */
865 13b2bc37 2022-10-23 stsp 	err = got_repo_open(&repo_read.repo, "/", NULL, pack_fds);
866 13b2bc37 2022-10-23 stsp 	if (err)
867 13b2bc37 2022-10-23 stsp 		goto done;
868 13b2bc37 2022-10-23 stsp 	if (!got_repo_is_bare(repo_read.repo)) {
869 13b2bc37 2022-10-23 stsp 		err = got_error_msg(GOT_ERR_NOT_GIT_REPO,
870 13b2bc37 2022-10-23 stsp 		    "bare git repository required");
871 13b2bc37 2022-10-23 stsp 		goto done;
872 13b2bc37 2022-10-23 stsp 	}
873 13b2bc37 2022-10-23 stsp 
874 13b2bc37 2022-10-23 stsp 	got_repo_temp_fds_set(repo_read.repo, temp_fds);
875 13b2bc37 2022-10-23 stsp 
876 13b2bc37 2022-10-23 stsp 	signal(SIGINT, catch_sigint);
877 13b2bc37 2022-10-23 stsp 	signal(SIGTERM, catch_sigterm);
878 13b2bc37 2022-10-23 stsp 	signal(SIGPIPE, SIG_IGN);
879 13b2bc37 2022-10-23 stsp 	signal(SIGHUP, SIG_IGN);
880 13b2bc37 2022-10-23 stsp 
881 13b2bc37 2022-10-23 stsp 	imsg_init(&iev.ibuf, GOTD_SOCK_FILENO);
882 13b2bc37 2022-10-23 stsp 	iev.handler = repo_read_dispatch;
883 13b2bc37 2022-10-23 stsp 	iev.events = EV_READ;
884 13b2bc37 2022-10-23 stsp 	iev.handler_arg = NULL;
885 13b2bc37 2022-10-23 stsp 	event_set(&iev.ev, iev.ibuf.fd, EV_READ, repo_read_dispatch, &iev);
886 13b2bc37 2022-10-23 stsp 	if (event_add(&iev.ev, NULL) == -1) {
887 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("event_add");
888 13b2bc37 2022-10-23 stsp 		goto done;
889 13b2bc37 2022-10-23 stsp 	}
890 13b2bc37 2022-10-23 stsp 
891 13b2bc37 2022-10-23 stsp 	event_dispatch();
892 13b2bc37 2022-10-23 stsp done:
893 13b2bc37 2022-10-23 stsp 	if (err)
894 13b2bc37 2022-10-23 stsp 		log_warnx("%s: %s", title, err->msg);
895 13b2bc37 2022-10-23 stsp 	repo_read_shutdown();
896 13b2bc37 2022-10-23 stsp }
897 13b2bc37 2022-10-23 stsp 
898 13b2bc37 2022-10-23 stsp void
899 13b2bc37 2022-10-23 stsp repo_read_shutdown(void)
900 13b2bc37 2022-10-23 stsp {
901 13b2bc37 2022-10-23 stsp 	log_debug("%s: shutting down", repo_read.title);
902 13b2bc37 2022-10-23 stsp 	if (repo_read.repo)
903 13b2bc37 2022-10-23 stsp 		got_repo_close(repo_read.repo);
904 13b2bc37 2022-10-23 stsp 	got_repo_pack_fds_close(repo_read.pack_fds);
905 13b2bc37 2022-10-23 stsp 	got_repo_temp_fds_close(repo_read.temp_fds);
906 13b2bc37 2022-10-23 stsp 	exit(0);
907 13b2bc37 2022-10-23 stsp }