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 1a52c9bf 2022-12-30 stsp static struct repo_read_client {
 66 13b2bc37 2022-10-23 stsp 	uint32_t			 id;
 67 13b2bc37 2022-10-23 stsp 	int				 fd;
 68 13b2bc37 2022-10-23 stsp 	int				 delta_cache_fd;
 69 13b2bc37 2022-10-23 stsp 	int				 report_progress;
 70 86769de8 2022-10-28 stsp 	int				 pack_pipe;
 71 13b2bc37 2022-10-23 stsp 	struct gotd_object_id_array	 want_ids;
 72 13b2bc37 2022-10-23 stsp 	struct gotd_object_id_array	 have_ids;
 73 1a52c9bf 2022-12-30 stsp } repo_read_client;
 74 13b2bc37 2022-10-23 stsp 
 75 13b2bc37 2022-10-23 stsp static volatile sig_atomic_t sigint_received;
 76 13b2bc37 2022-10-23 stsp static volatile sig_atomic_t sigterm_received;
 77 13b2bc37 2022-10-23 stsp 
 78 13b2bc37 2022-10-23 stsp static void
 79 13b2bc37 2022-10-23 stsp catch_sigint(int signo)
 80 13b2bc37 2022-10-23 stsp {
 81 13b2bc37 2022-10-23 stsp 	sigint_received = 1;
 82 13b2bc37 2022-10-23 stsp }
 83 13b2bc37 2022-10-23 stsp 
 84 13b2bc37 2022-10-23 stsp static void
 85 13b2bc37 2022-10-23 stsp catch_sigterm(int signo)
 86 13b2bc37 2022-10-23 stsp {
 87 13b2bc37 2022-10-23 stsp 	sigterm_received = 1;
 88 13b2bc37 2022-10-23 stsp }
 89 13b2bc37 2022-10-23 stsp 
 90 13b2bc37 2022-10-23 stsp static const struct got_error *
 91 13b2bc37 2022-10-23 stsp check_cancelled(void *arg)
 92 13b2bc37 2022-10-23 stsp {
 93 13b2bc37 2022-10-23 stsp 	if (sigint_received || sigterm_received)
 94 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_CANCELLED);
 95 13b2bc37 2022-10-23 stsp 
 96 13b2bc37 2022-10-23 stsp 	return NULL;
 97 13b2bc37 2022-10-23 stsp }
 98 13b2bc37 2022-10-23 stsp 
 99 13b2bc37 2022-10-23 stsp static const struct got_error *
100 ca7cfae0 2022-11-07 stsp send_symref(struct got_reference *symref, struct got_object_id *target_id,
101 ca7cfae0 2022-11-07 stsp     struct imsgbuf *ibuf)
102 13b2bc37 2022-10-23 stsp {
103 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
104 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_symref isymref;
105 13b2bc37 2022-10-23 stsp 	const char *refname = got_ref_get_name(symref);
106 13b2bc37 2022-10-23 stsp 	const char *target = got_ref_get_symref_target(symref);
107 13b2bc37 2022-10-23 stsp 	size_t len;
108 13b2bc37 2022-10-23 stsp 	struct ibuf *wbuf;
109 13b2bc37 2022-10-23 stsp 
110 13b2bc37 2022-10-23 stsp 	memset(&isymref, 0, sizeof(isymref));
111 13b2bc37 2022-10-23 stsp 	isymref.name_len = strlen(refname);
112 13b2bc37 2022-10-23 stsp 	isymref.target_len = strlen(target);
113 13b2bc37 2022-10-23 stsp 	memcpy(isymref.target_id, target_id->sha1, sizeof(isymref.target_id));
114 13b2bc37 2022-10-23 stsp 
115 13b2bc37 2022-10-23 stsp 	len = sizeof(isymref) + isymref.name_len + isymref.target_len;
116 13b2bc37 2022-10-23 stsp 	if (len > MAX_IMSGSIZE - IMSG_HEADER_SIZE) {
117 13b2bc37 2022-10-23 stsp 		err = got_error(GOT_ERR_NO_SPACE);
118 13b2bc37 2022-10-23 stsp 		goto done;
119 13b2bc37 2022-10-23 stsp 	}
120 13b2bc37 2022-10-23 stsp 
121 13b2bc37 2022-10-23 stsp 	wbuf = imsg_create(ibuf, GOTD_IMSG_SYMREF, 0, 0, len);
122 13b2bc37 2022-10-23 stsp 	if (wbuf == NULL) {
123 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_create SYMREF");
124 13b2bc37 2022-10-23 stsp 		goto done;
125 13b2bc37 2022-10-23 stsp 	}
126 13b2bc37 2022-10-23 stsp 
127 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, &isymref, sizeof(isymref)) == -1) {
128 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add SYMREF");
129 13b2bc37 2022-10-23 stsp 		goto done;
130 13b2bc37 2022-10-23 stsp 	}
131 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, refname, isymref.name_len) == -1) {
132 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add SYMREF");
133 13b2bc37 2022-10-23 stsp 		goto done;
134 13b2bc37 2022-10-23 stsp 	}
135 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, target, isymref.target_len) == -1) {
136 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add SYMREF");
137 13b2bc37 2022-10-23 stsp 		goto done;
138 13b2bc37 2022-10-23 stsp 	}
139 13b2bc37 2022-10-23 stsp 
140 13b2bc37 2022-10-23 stsp 	wbuf->fd = -1;
141 13b2bc37 2022-10-23 stsp 	imsg_close(ibuf, wbuf);
142 13b2bc37 2022-10-23 stsp done:
143 13b2bc37 2022-10-23 stsp 	free(target_id);
144 13b2bc37 2022-10-23 stsp 	return err;
145 13b2bc37 2022-10-23 stsp }
146 13b2bc37 2022-10-23 stsp 
147 13b2bc37 2022-10-23 stsp static const struct got_error *
148 13b2bc37 2022-10-23 stsp send_peeled_tag_ref(struct got_reference *ref, struct got_object *obj,
149 13b2bc37 2022-10-23 stsp     struct imsgbuf *ibuf)
150 13b2bc37 2022-10-23 stsp {
151 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
152 13b2bc37 2022-10-23 stsp 	struct got_tag_object *tag;
153 13b2bc37 2022-10-23 stsp 	size_t namelen, len;
154 13b2bc37 2022-10-23 stsp 	char *peeled_refname = NULL;
155 13b2bc37 2022-10-23 stsp 	struct got_object_id *id;
156 13b2bc37 2022-10-23 stsp 	struct ibuf *wbuf;
157 13b2bc37 2022-10-23 stsp 
158 13b2bc37 2022-10-23 stsp 	err = got_object_tag_open(&tag, repo_read.repo, obj);
159 13b2bc37 2022-10-23 stsp 	if (err)
160 13b2bc37 2022-10-23 stsp 		return err;
161 13b2bc37 2022-10-23 stsp 
162 13b2bc37 2022-10-23 stsp 	if (asprintf(&peeled_refname, "%s^{}", got_ref_get_name(ref)) == -1) {
163 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("asprintf");
164 13b2bc37 2022-10-23 stsp 		goto done;
165 13b2bc37 2022-10-23 stsp 	}
166 13b2bc37 2022-10-23 stsp 
167 13b2bc37 2022-10-23 stsp 	id = got_object_tag_get_object_id(tag);
168 13b2bc37 2022-10-23 stsp 	namelen = strlen(peeled_refname);
169 13b2bc37 2022-10-23 stsp 
170 13b2bc37 2022-10-23 stsp 	len = sizeof(struct gotd_imsg_ref) + namelen;
171 13b2bc37 2022-10-23 stsp 	if (len > MAX_IMSGSIZE - IMSG_HEADER_SIZE) {
172 13b2bc37 2022-10-23 stsp 		err = got_error(GOT_ERR_NO_SPACE);
173 13b2bc37 2022-10-23 stsp 		goto done;
174 13b2bc37 2022-10-23 stsp 	}
175 13b2bc37 2022-10-23 stsp 
176 13b2bc37 2022-10-23 stsp 	wbuf = imsg_create(ibuf, GOTD_IMSG_REF, PROC_REPO_READ,
177 13b2bc37 2022-10-23 stsp 	    repo_read.pid, len);
178 13b2bc37 2022-10-23 stsp 	if (wbuf == NULL) {
179 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_create MREF");
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 	/* Keep in sync with struct gotd_imsg_ref definition. */
184 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, id->sha1, SHA1_DIGEST_LENGTH) == -1) {
185 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add REF");
186 13b2bc37 2022-10-23 stsp 		goto done;
187 13b2bc37 2022-10-23 stsp 	}
188 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, &namelen, sizeof(namelen)) == -1) {
189 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add REF");
190 13b2bc37 2022-10-23 stsp 		goto done;
191 13b2bc37 2022-10-23 stsp 	}
192 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, peeled_refname, namelen) == -1) {
193 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add REF");
194 13b2bc37 2022-10-23 stsp 		goto done;
195 13b2bc37 2022-10-23 stsp 	}
196 13b2bc37 2022-10-23 stsp 
197 13b2bc37 2022-10-23 stsp 	wbuf->fd = -1;
198 13b2bc37 2022-10-23 stsp 	imsg_close(ibuf, wbuf);
199 13b2bc37 2022-10-23 stsp done:
200 13b2bc37 2022-10-23 stsp 	got_object_tag_close(tag);
201 13b2bc37 2022-10-23 stsp 	return err;
202 13b2bc37 2022-10-23 stsp }
203 13b2bc37 2022-10-23 stsp 
204 13b2bc37 2022-10-23 stsp static const struct got_error *
205 13b2bc37 2022-10-23 stsp send_ref(struct got_reference *ref, struct imsgbuf *ibuf)
206 13b2bc37 2022-10-23 stsp {
207 13b2bc37 2022-10-23 stsp 	const struct got_error *err;
208 13b2bc37 2022-10-23 stsp 	const char *refname = got_ref_get_name(ref);
209 13b2bc37 2022-10-23 stsp 	size_t namelen;
210 13b2bc37 2022-10-23 stsp 	struct got_object_id *id = NULL;
211 13b2bc37 2022-10-23 stsp 	struct got_object *obj = NULL;
212 13b2bc37 2022-10-23 stsp 	size_t len;
213 13b2bc37 2022-10-23 stsp 	struct ibuf *wbuf;
214 13b2bc37 2022-10-23 stsp 
215 13b2bc37 2022-10-23 stsp 	namelen = strlen(refname);
216 13b2bc37 2022-10-23 stsp 
217 13b2bc37 2022-10-23 stsp 	len = sizeof(struct gotd_imsg_ref) + namelen;
218 13b2bc37 2022-10-23 stsp 	if (len > MAX_IMSGSIZE - IMSG_HEADER_SIZE)
219 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_NO_SPACE);
220 13b2bc37 2022-10-23 stsp 
221 13b2bc37 2022-10-23 stsp 	err = got_ref_resolve(&id, repo_read.repo, ref);
222 13b2bc37 2022-10-23 stsp 	if (err)
223 13b2bc37 2022-10-23 stsp 		return err;
224 13b2bc37 2022-10-23 stsp 
225 13b2bc37 2022-10-23 stsp 	wbuf = imsg_create(ibuf, GOTD_IMSG_REF, PROC_REPO_READ,
226 13b2bc37 2022-10-23 stsp 	    repo_read.pid, len);
227 13b2bc37 2022-10-23 stsp 	if (wbuf == NULL) {
228 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_create REF");
229 13b2bc37 2022-10-23 stsp 		goto done;
230 13b2bc37 2022-10-23 stsp 	}
231 13b2bc37 2022-10-23 stsp 
232 13b2bc37 2022-10-23 stsp 	/* Keep in sync with struct gotd_imsg_ref definition. */
233 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, id->sha1, SHA1_DIGEST_LENGTH) == -1)
234 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF");
235 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, &namelen, sizeof(namelen)) == -1)
236 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF");
237 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, refname, namelen) == -1)
238 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF");
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 
243 13b2bc37 2022-10-23 stsp 	err = got_object_open(&obj, repo_read.repo, id);
244 13b2bc37 2022-10-23 stsp 	if (err)
245 13b2bc37 2022-10-23 stsp 		goto done;
246 13b2bc37 2022-10-23 stsp 	if (obj->type == GOT_OBJ_TYPE_TAG)
247 13b2bc37 2022-10-23 stsp 		err = send_peeled_tag_ref(ref, obj, ibuf);
248 13b2bc37 2022-10-23 stsp done:
249 13b2bc37 2022-10-23 stsp 	if (obj)
250 13b2bc37 2022-10-23 stsp 		got_object_close(obj);
251 13b2bc37 2022-10-23 stsp 	free(id);
252 13b2bc37 2022-10-23 stsp 	return err;
253 13b2bc37 2022-10-23 stsp }
254 13b2bc37 2022-10-23 stsp 
255 13b2bc37 2022-10-23 stsp static const struct got_error *
256 1a52c9bf 2022-12-30 stsp list_refs(struct imsg *imsg)
257 13b2bc37 2022-10-23 stsp {
258 13b2bc37 2022-10-23 stsp 	const struct got_error *err;
259 1a52c9bf 2022-12-30 stsp 	struct repo_read_client *client = &repo_read_client;
260 13b2bc37 2022-10-23 stsp 	struct got_reflist_head refs;
261 13b2bc37 2022-10-23 stsp 	struct got_reflist_entry *re;
262 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_list_refs_internal ireq;
263 13b2bc37 2022-10-23 stsp 	size_t datalen;
264 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_reflist irefs;
265 13b2bc37 2022-10-23 stsp 	struct imsgbuf ibuf;
266 13b2bc37 2022-10-23 stsp 	int client_fd = imsg->fd;
267 ca7cfae0 2022-11-07 stsp 	struct got_object_id *head_target_id = NULL;
268 13b2bc37 2022-10-23 stsp 
269 13b2bc37 2022-10-23 stsp 	TAILQ_INIT(&refs);
270 13b2bc37 2022-10-23 stsp 
271 13b2bc37 2022-10-23 stsp 	if (client_fd == -1)
272 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
273 13b2bc37 2022-10-23 stsp 
274 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
275 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq))
276 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
277 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, sizeof(ireq));
278 13b2bc37 2022-10-23 stsp 
279 1a52c9bf 2022-12-30 stsp 	if (ireq.client_id == 0)
280 1a52c9bf 2022-12-30 stsp 		return got_error(GOT_ERR_CLIENT_ID);
281 1a52c9bf 2022-12-30 stsp 	if (client->id != 0) {
282 1a52c9bf 2022-12-30 stsp 		return got_error_msg(GOT_ERR_CLIENT_ID,
283 1a52c9bf 2022-12-30 stsp 		    "duplicate list-refs request");
284 1a52c9bf 2022-12-30 stsp 	}
285 1a52c9bf 2022-12-30 stsp 	client->id = ireq.client_id;
286 1a52c9bf 2022-12-30 stsp 	client->fd = client_fd;
287 1a52c9bf 2022-12-30 stsp 	client->delta_cache_fd = -1;
288 1a52c9bf 2022-12-30 stsp 	client->pack_pipe = -1;
289 13b2bc37 2022-10-23 stsp 
290 13b2bc37 2022-10-23 stsp 	imsg_init(&ibuf, client_fd);
291 13b2bc37 2022-10-23 stsp 
292 13b2bc37 2022-10-23 stsp 	err = got_ref_list(&refs, repo_read.repo, "",
293 13b2bc37 2022-10-23 stsp 	    got_ref_cmp_by_name, NULL);
294 13b2bc37 2022-10-23 stsp 	if (err)
295 13b2bc37 2022-10-23 stsp 		return err;
296 13b2bc37 2022-10-23 stsp 
297 13b2bc37 2022-10-23 stsp 	memset(&irefs, 0, sizeof(irefs));
298 13b2bc37 2022-10-23 stsp 	TAILQ_FOREACH(re, &refs, entry) {
299 13b2bc37 2022-10-23 stsp 		struct got_object_id *id;
300 13b2bc37 2022-10-23 stsp 		int obj_type;
301 13b2bc37 2022-10-23 stsp 
302 13b2bc37 2022-10-23 stsp 		if (got_ref_is_symbolic(re->ref)) {
303 13b2bc37 2022-10-23 stsp 			const char *refname = got_ref_get_name(re->ref);
304 ca7cfae0 2022-11-07 stsp 			if (strcmp(refname, GOT_REF_HEAD) != 0)
305 ca7cfae0 2022-11-07 stsp 				continue;
306 ca7cfae0 2022-11-07 stsp 			err = got_ref_resolve(&head_target_id, repo_read.repo,
307 ca7cfae0 2022-11-07 stsp 			    re->ref);
308 ca7cfae0 2022-11-07 stsp 			if (err) {
309 ca7cfae0 2022-11-07 stsp 				if (err->code != GOT_ERR_NOT_REF)
310 ca7cfae0 2022-11-07 stsp 					return err;
311 ca7cfae0 2022-11-07 stsp 				/*
312 ca7cfae0 2022-11-07 stsp 				 * HEAD points to a non-existent branch.
313 ca7cfae0 2022-11-07 stsp 				 * Do not advertise it.
314 ca7cfae0 2022-11-07 stsp 				 * Matches git-daemon's behaviour.
315 ca7cfae0 2022-11-07 stsp 				 */
316 ca7cfae0 2022-11-07 stsp 				head_target_id = NULL;
317 ca7cfae0 2022-11-07 stsp 				err = NULL;
318 ca7cfae0 2022-11-07 stsp 			} else
319 13b2bc37 2022-10-23 stsp 				irefs.nrefs++;
320 13b2bc37 2022-10-23 stsp 			continue;
321 13b2bc37 2022-10-23 stsp 		}
322 13b2bc37 2022-10-23 stsp 
323 13b2bc37 2022-10-23 stsp 		irefs.nrefs++;
324 13b2bc37 2022-10-23 stsp 
325 13b2bc37 2022-10-23 stsp 		/* Account for a peeled tag refs. */
326 13b2bc37 2022-10-23 stsp 		err = got_ref_resolve(&id, repo_read.repo, re->ref);
327 13b2bc37 2022-10-23 stsp 		if (err)
328 13b2bc37 2022-10-23 stsp 			goto done;
329 13b2bc37 2022-10-23 stsp 		err = got_object_get_type(&obj_type, repo_read.repo, id);	
330 13b2bc37 2022-10-23 stsp 		free(id);
331 13b2bc37 2022-10-23 stsp 		if (err)
332 13b2bc37 2022-10-23 stsp 			goto done;
333 13b2bc37 2022-10-23 stsp 		if (obj_type == GOT_OBJ_TYPE_TAG)
334 13b2bc37 2022-10-23 stsp 			irefs.nrefs++;
335 13b2bc37 2022-10-23 stsp 	}
336 13b2bc37 2022-10-23 stsp 
337 13b2bc37 2022-10-23 stsp 	if (imsg_compose(&ibuf, GOTD_IMSG_REFLIST, PROC_REPO_READ,
338 13b2bc37 2022-10-23 stsp 	    repo_read.pid, -1, &irefs, sizeof(irefs)) == -1) {
339 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_compose REFLIST");
340 13b2bc37 2022-10-23 stsp 		goto done;
341 13b2bc37 2022-10-23 stsp 	}
342 13b2bc37 2022-10-23 stsp 
343 13b2bc37 2022-10-23 stsp 	/*
344 13b2bc37 2022-10-23 stsp 	 * Send the HEAD symref first. In Git-protocol versions < 2
345 13b2bc37 2022-10-23 stsp 	 * the HEAD symref must be announced on the initial line of
346 13b2bc37 2022-10-23 stsp 	 * the server's ref advertisement.
347 13b2bc37 2022-10-23 stsp 	 * For now, we do not advertise symrefs other than HEAD.
348 13b2bc37 2022-10-23 stsp 	 */
349 13b2bc37 2022-10-23 stsp 	TAILQ_FOREACH(re, &refs, entry) {
350 13b2bc37 2022-10-23 stsp 		if (!got_ref_is_symbolic(re->ref) ||
351 ca7cfae0 2022-11-07 stsp 		    strcmp(got_ref_get_name(re->ref), GOT_REF_HEAD) != 0 ||
352 ca7cfae0 2022-11-07 stsp 		    head_target_id == NULL)
353 13b2bc37 2022-10-23 stsp 			continue;
354 ca7cfae0 2022-11-07 stsp 		err = send_symref(re->ref, head_target_id, &ibuf);
355 13b2bc37 2022-10-23 stsp 		if (err)
356 13b2bc37 2022-10-23 stsp 			goto done;
357 13b2bc37 2022-10-23 stsp 		break;
358 13b2bc37 2022-10-23 stsp 	}
359 13b2bc37 2022-10-23 stsp 	TAILQ_FOREACH(re, &refs, entry) {
360 13b2bc37 2022-10-23 stsp 		if (got_ref_is_symbolic(re->ref))
361 13b2bc37 2022-10-23 stsp 			continue;
362 13b2bc37 2022-10-23 stsp 		err = send_ref(re->ref, &ibuf);
363 13b2bc37 2022-10-23 stsp 		if (err)
364 13b2bc37 2022-10-23 stsp 			goto done;
365 13b2bc37 2022-10-23 stsp 	}
366 13b2bc37 2022-10-23 stsp 
367 13b2bc37 2022-10-23 stsp 	err = gotd_imsg_flush(&ibuf);
368 13b2bc37 2022-10-23 stsp done:
369 13b2bc37 2022-10-23 stsp 	got_ref_list_free(&refs);
370 13b2bc37 2022-10-23 stsp 	imsg_clear(&ibuf);
371 13b2bc37 2022-10-23 stsp 	return err;
372 13b2bc37 2022-10-23 stsp }
373 13b2bc37 2022-10-23 stsp 
374 13b2bc37 2022-10-23 stsp static const struct got_error *
375 13b2bc37 2022-10-23 stsp record_object_id(struct gotd_object_id_array *array, struct got_object_id *id)
376 13b2bc37 2022-10-23 stsp {
377 13b2bc37 2022-10-23 stsp 	const size_t alloc_chunksz = 256;
378 13b2bc37 2022-10-23 stsp 
379 13b2bc37 2022-10-23 stsp 	if (array->ids == NULL) {
380 13b2bc37 2022-10-23 stsp 		array->ids = reallocarray(NULL, alloc_chunksz,
381 13b2bc37 2022-10-23 stsp 		    sizeof(*array->ids));
382 13b2bc37 2022-10-23 stsp 		if (array->ids == NULL)
383 13b2bc37 2022-10-23 stsp 			return got_error_from_errno("reallocarray");
384 13b2bc37 2022-10-23 stsp 		array->nalloc = alloc_chunksz;
385 13b2bc37 2022-10-23 stsp 		array->nids = 0;
386 13b2bc37 2022-10-23 stsp 	} else if (array->nalloc <= array->nids) {
387 13b2bc37 2022-10-23 stsp 		struct got_object_id **new;
388 13b2bc37 2022-10-23 stsp 		new = recallocarray(array->ids, array->nalloc,
389 13b2bc37 2022-10-23 stsp 		    array->nalloc + alloc_chunksz, sizeof(*new));
390 13b2bc37 2022-10-23 stsp 		if (new == NULL)
391 13b2bc37 2022-10-23 stsp 			return got_error_from_errno("recallocarray");
392 13b2bc37 2022-10-23 stsp 		array->ids = new;
393 13b2bc37 2022-10-23 stsp 		array->nalloc += alloc_chunksz;
394 13b2bc37 2022-10-23 stsp 	}
395 13b2bc37 2022-10-23 stsp 
396 13b2bc37 2022-10-23 stsp 	array->ids[array->nids] = got_object_id_dup(id);
397 13b2bc37 2022-10-23 stsp 	if (array->ids[array->nids] == NULL)
398 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("got_object_id_dup");
399 13b2bc37 2022-10-23 stsp 	array->nids++;
400 13b2bc37 2022-10-23 stsp 	return NULL;
401 13b2bc37 2022-10-23 stsp }
402 13b2bc37 2022-10-23 stsp 
403 13b2bc37 2022-10-23 stsp static void
404 13b2bc37 2022-10-23 stsp free_object_ids(struct gotd_object_id_array *array)
405 13b2bc37 2022-10-23 stsp {
406 13b2bc37 2022-10-23 stsp 	size_t i;
407 13b2bc37 2022-10-23 stsp 
408 13b2bc37 2022-10-23 stsp 	for (i = 0; i < array->nids; i++)
409 13b2bc37 2022-10-23 stsp 		free(array->ids[i]);
410 13b2bc37 2022-10-23 stsp 	free(array->ids);
411 13b2bc37 2022-10-23 stsp 
412 13b2bc37 2022-10-23 stsp 	array->ids = NULL;
413 13b2bc37 2022-10-23 stsp 	array->nalloc = 0;
414 13b2bc37 2022-10-23 stsp 	array->nids = 0;
415 13b2bc37 2022-10-23 stsp }
416 13b2bc37 2022-10-23 stsp 
417 13b2bc37 2022-10-23 stsp static const struct got_error *
418 1a52c9bf 2022-12-30 stsp recv_want(struct imsg *imsg)
419 13b2bc37 2022-10-23 stsp {
420 13b2bc37 2022-10-23 stsp 	const struct got_error *err;
421 1a52c9bf 2022-12-30 stsp 	struct repo_read_client *client = &repo_read_client;
422 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_want iwant;
423 13b2bc37 2022-10-23 stsp 	size_t datalen;
424 13b2bc37 2022-10-23 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
425 13b2bc37 2022-10-23 stsp 	struct got_object_id id;
426 13b2bc37 2022-10-23 stsp 	int obj_type;
427 13b2bc37 2022-10-23 stsp 	struct imsgbuf ibuf;
428 13b2bc37 2022-10-23 stsp 
429 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
430 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(iwant))
431 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
432 13b2bc37 2022-10-23 stsp 	memcpy(&iwant, imsg->data, sizeof(iwant));
433 13b2bc37 2022-10-23 stsp 
434 13b2bc37 2022-10-23 stsp 	memset(&id, 0, sizeof(id));
435 13b2bc37 2022-10-23 stsp 	memcpy(id.sha1, iwant.object_id, SHA1_DIGEST_LENGTH);
436 13b2bc37 2022-10-23 stsp 
437 13b2bc37 2022-10-23 stsp 	if (log_getverbose() > 0 &&
438 13b2bc37 2022-10-23 stsp 	    got_sha1_digest_to_str(id.sha1, hex, sizeof(hex)))
439 13b2bc37 2022-10-23 stsp 		log_debug("client wants %s", hex);
440 13b2bc37 2022-10-23 stsp 
441 1a52c9bf 2022-12-30 stsp 	imsg_init(&ibuf, client->fd);
442 13b2bc37 2022-10-23 stsp 
443 13b2bc37 2022-10-23 stsp 	err = got_object_get_type(&obj_type, repo_read.repo, &id);
444 13b2bc37 2022-10-23 stsp 	if (err)
445 13b2bc37 2022-10-23 stsp 		return err;
446 13b2bc37 2022-10-23 stsp 
447 13b2bc37 2022-10-23 stsp 	if (obj_type != GOT_OBJ_TYPE_COMMIT &&
448 13b2bc37 2022-10-23 stsp 	    obj_type != GOT_OBJ_TYPE_TAG)
449 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_OBJ_TYPE);
450 13b2bc37 2022-10-23 stsp 
451 1a52c9bf 2022-12-30 stsp 	err = record_object_id(&client->want_ids, &id);
452 13b2bc37 2022-10-23 stsp 	if (err)
453 13b2bc37 2022-10-23 stsp 		return err;
454 13b2bc37 2022-10-23 stsp 
455 13b2bc37 2022-10-23 stsp 	gotd_imsg_send_ack(&id, &ibuf, PROC_REPO_READ, repo_read.pid);
456 13b2bc37 2022-10-23 stsp 	imsg_clear(&ibuf);
457 13b2bc37 2022-10-23 stsp 	return err;
458 13b2bc37 2022-10-23 stsp }
459 13b2bc37 2022-10-23 stsp 
460 13b2bc37 2022-10-23 stsp static const struct got_error *
461 1a52c9bf 2022-12-30 stsp recv_have(struct imsg *imsg)
462 13b2bc37 2022-10-23 stsp {
463 13b2bc37 2022-10-23 stsp 	const struct got_error *err;
464 1a52c9bf 2022-12-30 stsp 	struct repo_read_client *client = &repo_read_client;
465 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_have ihave;
466 13b2bc37 2022-10-23 stsp 	size_t datalen;
467 13b2bc37 2022-10-23 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
468 13b2bc37 2022-10-23 stsp 	struct got_object_id id;
469 13b2bc37 2022-10-23 stsp 	int obj_type;
470 13b2bc37 2022-10-23 stsp 	struct imsgbuf ibuf;
471 13b2bc37 2022-10-23 stsp 
472 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
473 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ihave))
474 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
475 13b2bc37 2022-10-23 stsp 	memcpy(&ihave, imsg->data, sizeof(ihave));
476 13b2bc37 2022-10-23 stsp 
477 13b2bc37 2022-10-23 stsp 	memset(&id, 0, sizeof(id));
478 13b2bc37 2022-10-23 stsp 	memcpy(id.sha1, ihave.object_id, SHA1_DIGEST_LENGTH);
479 13b2bc37 2022-10-23 stsp 
480 13b2bc37 2022-10-23 stsp 	if (log_getverbose() > 0 &&
481 13b2bc37 2022-10-23 stsp 	    got_sha1_digest_to_str(id.sha1, hex, sizeof(hex)))
482 13b2bc37 2022-10-23 stsp 		log_debug("client has %s", hex);
483 13b2bc37 2022-10-23 stsp 
484 1a52c9bf 2022-12-30 stsp 	imsg_init(&ibuf, client->fd);
485 13b2bc37 2022-10-23 stsp 
486 13b2bc37 2022-10-23 stsp 	err = got_object_get_type(&obj_type, repo_read.repo, &id);
487 13b2bc37 2022-10-23 stsp 	if (err) {
488 13b2bc37 2022-10-23 stsp 		if (err->code == GOT_ERR_NO_OBJ) {
489 13b2bc37 2022-10-23 stsp 			gotd_imsg_send_nak(&id, &ibuf,
490 13b2bc37 2022-10-23 stsp 			    PROC_REPO_READ, repo_read.pid);
491 13b2bc37 2022-10-23 stsp 			err = NULL;
492 13b2bc37 2022-10-23 stsp 		}
493 13b2bc37 2022-10-23 stsp 		goto done;
494 13b2bc37 2022-10-23 stsp 	}
495 13b2bc37 2022-10-23 stsp 
496 13b2bc37 2022-10-23 stsp 	if (obj_type != GOT_OBJ_TYPE_COMMIT &&
497 13b2bc37 2022-10-23 stsp 	    obj_type != GOT_OBJ_TYPE_TAG) {
498 13b2bc37 2022-10-23 stsp 		gotd_imsg_send_nak(&id, &ibuf, PROC_REPO_READ, repo_read.pid);
499 13b2bc37 2022-10-23 stsp 		err = got_error(GOT_ERR_OBJ_TYPE);
500 13b2bc37 2022-10-23 stsp 		goto done;
501 13b2bc37 2022-10-23 stsp 	}
502 13b2bc37 2022-10-23 stsp 
503 1a52c9bf 2022-12-30 stsp 	err = record_object_id(&client->have_ids, &id);
504 13b2bc37 2022-10-23 stsp 	if (err)
505 13b2bc37 2022-10-23 stsp 		return err;
506 13b2bc37 2022-10-23 stsp 
507 13b2bc37 2022-10-23 stsp 	gotd_imsg_send_ack(&id, &ibuf, PROC_REPO_READ, repo_read.pid);
508 13b2bc37 2022-10-23 stsp done:
509 13b2bc37 2022-10-23 stsp 	imsg_clear(&ibuf);
510 13b2bc37 2022-10-23 stsp 	return err;
511 13b2bc37 2022-10-23 stsp }
512 13b2bc37 2022-10-23 stsp 
513 13b2bc37 2022-10-23 stsp struct repo_read_pack_progress_arg {
514 13b2bc37 2022-10-23 stsp 	int report_progress;
515 13b2bc37 2022-10-23 stsp 	struct imsgbuf *ibuf;
516 13b2bc37 2022-10-23 stsp 	int sent_ready;
517 13b2bc37 2022-10-23 stsp };
518 13b2bc37 2022-10-23 stsp 
519 13b2bc37 2022-10-23 stsp static const struct got_error *
520 13b2bc37 2022-10-23 stsp pack_progress(void *arg, int ncolored, int nfound, int ntrees,
521 13b2bc37 2022-10-23 stsp     off_t packfile_size, int ncommits, int nobj_total, int nobj_deltify,
522 13b2bc37 2022-10-23 stsp     int nobj_written)
523 13b2bc37 2022-10-23 stsp {
524 13b2bc37 2022-10-23 stsp 	struct repo_read_pack_progress_arg *a = arg;
525 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_progress iprog;
526 13b2bc37 2022-10-23 stsp 	int ret;
527 13b2bc37 2022-10-23 stsp 
528 13b2bc37 2022-10-23 stsp 	if (!a->report_progress)
529 13b2bc37 2022-10-23 stsp 		return NULL;
530 13b2bc37 2022-10-23 stsp 	if (packfile_size > 0 && a->sent_ready)
531 13b2bc37 2022-10-23 stsp 		return NULL;
532 13b2bc37 2022-10-23 stsp 
533 13b2bc37 2022-10-23 stsp 	memset(&iprog, 0, sizeof(iprog));
534 13b2bc37 2022-10-23 stsp 	iprog.ncolored = ncolored;
535 13b2bc37 2022-10-23 stsp 	iprog.nfound = nfound;
536 13b2bc37 2022-10-23 stsp 	iprog.ntrees = ntrees;
537 13b2bc37 2022-10-23 stsp 	iprog.packfile_size = packfile_size;
538 13b2bc37 2022-10-23 stsp 	iprog.ncommits = ncommits;
539 13b2bc37 2022-10-23 stsp 	iprog.nobj_total = nobj_total;
540 13b2bc37 2022-10-23 stsp 	iprog.nobj_deltify = nobj_deltify;
541 13b2bc37 2022-10-23 stsp 	iprog.nobj_written = nobj_written;
542 13b2bc37 2022-10-23 stsp 
543 13b2bc37 2022-10-23 stsp 	/* Using synchronous writes since we are blocking the event loop. */
544 13b2bc37 2022-10-23 stsp 	if (packfile_size == 0) {
545 13b2bc37 2022-10-23 stsp 		ret = imsg_compose(a->ibuf, GOTD_IMSG_PACKFILE_PROGRESS,
546 13b2bc37 2022-10-23 stsp 		    PROC_REPO_READ, repo_read.pid, -1, &iprog, sizeof(iprog));
547 13b2bc37 2022-10-23 stsp 		if (ret == -1) {
548 13b2bc37 2022-10-23 stsp 			return got_error_from_errno("imsg compose "
549 13b2bc37 2022-10-23 stsp 			    "PACKFILE_PROGRESS");
550 13b2bc37 2022-10-23 stsp 		}	
551 13b2bc37 2022-10-23 stsp 	} else {
552 13b2bc37 2022-10-23 stsp 		a->sent_ready = 1;
553 13b2bc37 2022-10-23 stsp 		ret = imsg_compose(a->ibuf, GOTD_IMSG_PACKFILE_READY,
554 13b2bc37 2022-10-23 stsp 		    PROC_REPO_READ, repo_read.pid, -1, &iprog, sizeof(iprog));
555 13b2bc37 2022-10-23 stsp 		if (ret == -1) {
556 13b2bc37 2022-10-23 stsp 			return got_error_from_errno("imsg compose "
557 13b2bc37 2022-10-23 stsp 			    "PACKFILE_READY");
558 13b2bc37 2022-10-23 stsp 		}
559 13b2bc37 2022-10-23 stsp 	}
560 13b2bc37 2022-10-23 stsp 
561 13b2bc37 2022-10-23 stsp 	return gotd_imsg_flush(a->ibuf);
562 13b2bc37 2022-10-23 stsp }
563 13b2bc37 2022-10-23 stsp 
564 13b2bc37 2022-10-23 stsp static const struct got_error *
565 1a52c9bf 2022-12-30 stsp receive_delta_cache_fd(struct imsg *imsg,
566 13b2bc37 2022-10-23 stsp     struct gotd_imsgev *iev)
567 13b2bc37 2022-10-23 stsp {
568 1a52c9bf 2022-12-30 stsp 	struct repo_read_client *client = &repo_read_client;
569 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_send_packfile ireq;
570 13b2bc37 2022-10-23 stsp 	size_t datalen;
571 13b2bc37 2022-10-23 stsp 
572 13b2bc37 2022-10-23 stsp 	log_debug("receving delta cache file");
573 13b2bc37 2022-10-23 stsp 
574 13b2bc37 2022-10-23 stsp 	if (imsg->fd == -1)
575 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
576 13b2bc37 2022-10-23 stsp 
577 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
578 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq))
579 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
580 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, sizeof(ireq));
581 13b2bc37 2022-10-23 stsp 
582 1a52c9bf 2022-12-30 stsp 	if (client->delta_cache_fd != -1)
583 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
584 13b2bc37 2022-10-23 stsp 
585 1a52c9bf 2022-12-30 stsp 	client->delta_cache_fd = imsg->fd;
586 1a52c9bf 2022-12-30 stsp 	client->report_progress = ireq.report_progress;
587 13b2bc37 2022-10-23 stsp 	return NULL;
588 13b2bc37 2022-10-23 stsp }
589 13b2bc37 2022-10-23 stsp 
590 13b2bc37 2022-10-23 stsp static const struct got_error *
591 1a52c9bf 2022-12-30 stsp receive_pack_pipe(struct imsg *imsg, struct gotd_imsgev *iev)
592 13b2bc37 2022-10-23 stsp {
593 1a52c9bf 2022-12-30 stsp 	struct repo_read_client *client = &repo_read_client;
594 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_pipe ireq;
595 13b2bc37 2022-10-23 stsp 	size_t datalen;
596 13b2bc37 2022-10-23 stsp 
597 13b2bc37 2022-10-23 stsp 	log_debug("receving pack pipe descriptor");
598 13b2bc37 2022-10-23 stsp 
599 13b2bc37 2022-10-23 stsp 	if (imsg->fd == -1)
600 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
601 13b2bc37 2022-10-23 stsp 
602 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
603 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq))
604 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
605 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, sizeof(ireq));
606 13b2bc37 2022-10-23 stsp 
607 1a52c9bf 2022-12-30 stsp 	if (client->pack_pipe != -1)
608 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
609 13b2bc37 2022-10-23 stsp 
610 1a52c9bf 2022-12-30 stsp 	client->pack_pipe = imsg->fd;
611 13b2bc37 2022-10-23 stsp 	return NULL;
612 13b2bc37 2022-10-23 stsp }
613 13b2bc37 2022-10-23 stsp 
614 13b2bc37 2022-10-23 stsp static const struct got_error *
615 1a52c9bf 2022-12-30 stsp send_packfile(struct imsg *imsg, struct gotd_imsgev *iev)
616 13b2bc37 2022-10-23 stsp {
617 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
618 1a52c9bf 2022-12-30 stsp 	struct repo_read_client *client = &repo_read_client;
619 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_done idone;
620 13b2bc37 2022-10-23 stsp 	uint8_t packsha1[SHA1_DIGEST_LENGTH];
621 13b2bc37 2022-10-23 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
622 13b2bc37 2022-10-23 stsp 	FILE *delta_cache = NULL;
623 13b2bc37 2022-10-23 stsp 	struct imsgbuf ibuf;
624 13b2bc37 2022-10-23 stsp 	struct repo_read_pack_progress_arg pa;
625 13b2bc37 2022-10-23 stsp 	struct got_ratelimit rl;
626 13b2bc37 2022-10-23 stsp 
627 13b2bc37 2022-10-23 stsp 	log_debug("packfile request received");
628 13b2bc37 2022-10-23 stsp 
629 13b2bc37 2022-10-23 stsp 	got_ratelimit_init(&rl, 2, 0);
630 13b2bc37 2022-10-23 stsp 
631 86769de8 2022-10-28 stsp 	if (client->delta_cache_fd == -1 || client->pack_pipe == -1)
632 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
633 13b2bc37 2022-10-23 stsp 
634 13b2bc37 2022-10-23 stsp 	imsg_init(&ibuf, client->fd);
635 13b2bc37 2022-10-23 stsp 
636 13b2bc37 2022-10-23 stsp 	delta_cache = fdopen(client->delta_cache_fd, "w+");
637 13b2bc37 2022-10-23 stsp 	if (delta_cache == NULL) {
638 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("fdopen");
639 13b2bc37 2022-10-23 stsp 		goto done;
640 13b2bc37 2022-10-23 stsp 	}
641 13b2bc37 2022-10-23 stsp 	client->delta_cache_fd = -1;
642 13b2bc37 2022-10-23 stsp 
643 13b2bc37 2022-10-23 stsp 	memset(&pa, 0, sizeof(pa));
644 13b2bc37 2022-10-23 stsp 	pa.ibuf = &ibuf;
645 13b2bc37 2022-10-23 stsp 	pa.report_progress = client->report_progress;
646 13b2bc37 2022-10-23 stsp 
647 86769de8 2022-10-28 stsp 	err = got_pack_create(packsha1, client->pack_pipe, delta_cache,
648 13b2bc37 2022-10-23 stsp 	    client->have_ids.ids, client->have_ids.nids,
649 13b2bc37 2022-10-23 stsp 	    client->want_ids.ids, client->want_ids.nids,
650 13b2bc37 2022-10-23 stsp 	    repo_read.repo, 0, 1, pack_progress, &pa, &rl,
651 13b2bc37 2022-10-23 stsp 	    check_cancelled, NULL);
652 13b2bc37 2022-10-23 stsp 	if (err)
653 13b2bc37 2022-10-23 stsp 		goto done;
654 13b2bc37 2022-10-23 stsp 	
655 13b2bc37 2022-10-23 stsp 	if (log_getverbose() > 0 &&
656 13b2bc37 2022-10-23 stsp 	    got_sha1_digest_to_str(packsha1, hex, sizeof(hex)))
657 13b2bc37 2022-10-23 stsp 		log_debug("sent pack-%s.pack", hex);
658 13b2bc37 2022-10-23 stsp 
659 13b2bc37 2022-10-23 stsp 	memset(&idone, 0, sizeof(idone));
660 13b2bc37 2022-10-23 stsp 	idone.client_id = client->id;
661 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(iev, GOTD_IMSG_PACKFILE_DONE,
662 13b2bc37 2022-10-23 stsp 	    PROC_REPO_READ, -1, &idone, sizeof(idone)) == -1)
663 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose PACKFILE_DONE");
664 13b2bc37 2022-10-23 stsp done:
665 13b2bc37 2022-10-23 stsp 	if (delta_cache != NULL && fclose(delta_cache) == EOF && err == NULL)
666 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("fclose");
667 13b2bc37 2022-10-23 stsp 	imsg_clear(&ibuf);
668 13b2bc37 2022-10-23 stsp 	return err;
669 13b2bc37 2022-10-23 stsp }
670 13b2bc37 2022-10-23 stsp 
671 13b2bc37 2022-10-23 stsp static const struct got_error *
672 13b2bc37 2022-10-23 stsp recv_disconnect(struct imsg *imsg)
673 13b2bc37 2022-10-23 stsp {
674 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
675 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_disconnect idisconnect;
676 13b2bc37 2022-10-23 stsp 	size_t datalen;
677 1a52c9bf 2022-12-30 stsp 	int delta_cache_fd, pack_pipe;
678 1a52c9bf 2022-12-30 stsp 	struct repo_read_client *client = &repo_read_client;
679 13b2bc37 2022-10-23 stsp 
680 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
681 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(idisconnect))
682 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
683 13b2bc37 2022-10-23 stsp 	memcpy(&idisconnect, imsg->data, sizeof(idisconnect));
684 13b2bc37 2022-10-23 stsp 
685 13b2bc37 2022-10-23 stsp 	log_debug("client disconnecting");
686 13b2bc37 2022-10-23 stsp 
687 13b2bc37 2022-10-23 stsp 	free_object_ids(&client->have_ids);
688 13b2bc37 2022-10-23 stsp 	free_object_ids(&client->want_ids);
689 1a52c9bf 2022-12-30 stsp 	if (close(client->fd) == -1)
690 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("close");
691 1a52c9bf 2022-12-30 stsp 	delta_cache_fd = client->delta_cache_fd;
692 13b2bc37 2022-10-23 stsp 	if (delta_cache_fd != -1 && close(delta_cache_fd) == -1 && err == NULL)
693 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("close");
694 1a52c9bf 2022-12-30 stsp 	pack_pipe = client->pack_pipe;
695 86769de8 2022-10-28 stsp 	if (pack_pipe != -1 && close(pack_pipe) == -1 && err == NULL)
696 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("close");
697 13b2bc37 2022-10-23 stsp 	return err;
698 13b2bc37 2022-10-23 stsp }
699 13b2bc37 2022-10-23 stsp 
700 13b2bc37 2022-10-23 stsp static void
701 13b2bc37 2022-10-23 stsp repo_read_dispatch(int fd, short event, void *arg)
702 13b2bc37 2022-10-23 stsp {
703 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
704 13b2bc37 2022-10-23 stsp 	struct gotd_imsgev *iev = arg;
705 13b2bc37 2022-10-23 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
706 13b2bc37 2022-10-23 stsp 	struct imsg imsg;
707 13b2bc37 2022-10-23 stsp 	ssize_t n;
708 13b2bc37 2022-10-23 stsp 	int shut = 0;
709 1a52c9bf 2022-12-30 stsp 	struct repo_read_client *client = &repo_read_client;
710 13b2bc37 2022-10-23 stsp 
711 13b2bc37 2022-10-23 stsp 	if (event & EV_READ) {
712 13b2bc37 2022-10-23 stsp 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
713 13b2bc37 2022-10-23 stsp 			fatal("imsg_read error");
714 13b2bc37 2022-10-23 stsp 		if (n == 0)	/* Connection closed. */
715 13b2bc37 2022-10-23 stsp 			shut = 1;
716 13b2bc37 2022-10-23 stsp 	}
717 13b2bc37 2022-10-23 stsp 
718 13b2bc37 2022-10-23 stsp 	if (event & EV_WRITE) {
719 13b2bc37 2022-10-23 stsp 		n = msgbuf_write(&ibuf->w);
720 13b2bc37 2022-10-23 stsp 		if (n == -1 && errno != EAGAIN)
721 13b2bc37 2022-10-23 stsp 			fatal("msgbuf_write");
722 13b2bc37 2022-10-23 stsp 		if (n == 0)	/* Connection closed. */
723 13b2bc37 2022-10-23 stsp 			shut = 1;
724 13b2bc37 2022-10-23 stsp 	}
725 13b2bc37 2022-10-23 stsp 
726 13b2bc37 2022-10-23 stsp 	while (err == NULL && check_cancelled(NULL) == NULL) {
727 13b2bc37 2022-10-23 stsp 		if ((n = imsg_get(ibuf, &imsg)) == -1)
728 13b2bc37 2022-10-23 stsp 			fatal("%s: imsg_get", __func__);
729 13b2bc37 2022-10-23 stsp 		if (n == 0)	/* No more messages. */
730 13b2bc37 2022-10-23 stsp 			break;
731 13b2bc37 2022-10-23 stsp 
732 1a52c9bf 2022-12-30 stsp 		if (imsg.hdr.type != GOTD_IMSG_LIST_REFS_INTERNAL &&
733 1a52c9bf 2022-12-30 stsp 		    client->id == 0) {
734 1a52c9bf 2022-12-30 stsp 			err = got_error(GOT_ERR_PRIVSEP_MSG);
735 1a52c9bf 2022-12-30 stsp 			break;
736 1a52c9bf 2022-12-30 stsp 		}
737 1a52c9bf 2022-12-30 stsp 
738 13b2bc37 2022-10-23 stsp 		switch (imsg.hdr.type) {
739 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_LIST_REFS_INTERNAL:
740 1a52c9bf 2022-12-30 stsp 			err = list_refs(&imsg);
741 13b2bc37 2022-10-23 stsp 			if (err)
742 13b2bc37 2022-10-23 stsp 				log_warnx("%s: ls-refs: %s", repo_read.title,
743 13b2bc37 2022-10-23 stsp 				    err->msg);
744 13b2bc37 2022-10-23 stsp 			break;
745 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_WANT:
746 1a52c9bf 2022-12-30 stsp 			err = recv_want(&imsg);
747 13b2bc37 2022-10-23 stsp 			if (err)
748 13b2bc37 2022-10-23 stsp 				log_warnx("%s: want-line: %s", repo_read.title,
749 13b2bc37 2022-10-23 stsp 				    err->msg);
750 13b2bc37 2022-10-23 stsp 			break;
751 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_HAVE:
752 1a52c9bf 2022-12-30 stsp 			err = recv_have(&imsg);
753 13b2bc37 2022-10-23 stsp 			if (err)
754 13b2bc37 2022-10-23 stsp 				log_warnx("%s: have-line: %s", repo_read.title,
755 13b2bc37 2022-10-23 stsp 				    err->msg);
756 13b2bc37 2022-10-23 stsp 			break;
757 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_SEND_PACKFILE:
758 1a52c9bf 2022-12-30 stsp 			err = receive_delta_cache_fd(&imsg, iev);
759 13b2bc37 2022-10-23 stsp 			if (err)
760 13b2bc37 2022-10-23 stsp 				log_warnx("%s: receiving delta cache: %s",
761 13b2bc37 2022-10-23 stsp 				    repo_read.title, err->msg);
762 13b2bc37 2022-10-23 stsp 			break;
763 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_PACKFILE_PIPE:
764 1a52c9bf 2022-12-30 stsp 			err = receive_pack_pipe(&imsg, iev);
765 13b2bc37 2022-10-23 stsp 			if (err) {
766 13b2bc37 2022-10-23 stsp 				log_warnx("%s: receiving pack pipe: %s",
767 13b2bc37 2022-10-23 stsp 				    repo_read.title, err->msg);
768 13b2bc37 2022-10-23 stsp 				break;
769 13b2bc37 2022-10-23 stsp 			}
770 1a52c9bf 2022-12-30 stsp 			err = send_packfile(&imsg, iev);
771 13b2bc37 2022-10-23 stsp 			if (err)
772 13b2bc37 2022-10-23 stsp 				log_warnx("%s: sending packfile: %s",
773 13b2bc37 2022-10-23 stsp 				    repo_read.title, err->msg);
774 13b2bc37 2022-10-23 stsp 			break;
775 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_DISCONNECT:
776 13b2bc37 2022-10-23 stsp 			err = recv_disconnect(&imsg);
777 13b2bc37 2022-10-23 stsp 			if (err)
778 13b2bc37 2022-10-23 stsp 				log_warnx("%s: disconnect: %s",
779 13b2bc37 2022-10-23 stsp 				    repo_read.title, err->msg);
780 1a52c9bf 2022-12-30 stsp 			shut = 1;
781 13b2bc37 2022-10-23 stsp 			break;
782 13b2bc37 2022-10-23 stsp 		default:
783 13b2bc37 2022-10-23 stsp 			log_debug("%s: unexpected imsg %d", repo_read.title,
784 13b2bc37 2022-10-23 stsp 			    imsg.hdr.type);
785 13b2bc37 2022-10-23 stsp 			break;
786 13b2bc37 2022-10-23 stsp 		}
787 13b2bc37 2022-10-23 stsp 
788 13b2bc37 2022-10-23 stsp 		imsg_free(&imsg);
789 13b2bc37 2022-10-23 stsp 	}
790 13b2bc37 2022-10-23 stsp 
791 13b2bc37 2022-10-23 stsp 	if (!shut && check_cancelled(NULL) == NULL) {
792 13b2bc37 2022-10-23 stsp 		if (err &&
793 13b2bc37 2022-10-23 stsp 		    gotd_imsg_send_error_event(iev, PROC_REPO_READ,
794 1a52c9bf 2022-12-30 stsp 		        client->id, err) == -1) {
795 13b2bc37 2022-10-23 stsp 			log_warnx("could not send error to parent: %s",
796 13b2bc37 2022-10-23 stsp 			    err->msg);
797 13b2bc37 2022-10-23 stsp 		}
798 13b2bc37 2022-10-23 stsp 		gotd_imsg_event_add(iev);
799 13b2bc37 2022-10-23 stsp 	} else {
800 13b2bc37 2022-10-23 stsp 		/* This pipe is dead. Remove its event handler */
801 13b2bc37 2022-10-23 stsp 		event_del(&iev->ev);
802 13b2bc37 2022-10-23 stsp 		event_loopexit(NULL);
803 13b2bc37 2022-10-23 stsp 	}
804 13b2bc37 2022-10-23 stsp }
805 13b2bc37 2022-10-23 stsp 
806 13b2bc37 2022-10-23 stsp void
807 eec68231 2022-12-14 stsp repo_read_main(const char *title, const char *repo_path,
808 eec68231 2022-12-14 stsp     int *pack_fds, int *temp_fds)
809 13b2bc37 2022-10-23 stsp {
810 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
811 13b2bc37 2022-10-23 stsp 	struct gotd_imsgev iev;
812 13b2bc37 2022-10-23 stsp 
813 13b2bc37 2022-10-23 stsp 	repo_read.title = title;
814 13b2bc37 2022-10-23 stsp 	repo_read.pid = getpid();
815 13b2bc37 2022-10-23 stsp 	repo_read.pack_fds = pack_fds;
816 13b2bc37 2022-10-23 stsp 	repo_read.temp_fds = temp_fds;
817 13b2bc37 2022-10-23 stsp 
818 eec68231 2022-12-14 stsp 	err = got_repo_open(&repo_read.repo, repo_path, NULL, pack_fds);
819 13b2bc37 2022-10-23 stsp 	if (err)
820 13b2bc37 2022-10-23 stsp 		goto done;
821 13b2bc37 2022-10-23 stsp 	if (!got_repo_is_bare(repo_read.repo)) {
822 13b2bc37 2022-10-23 stsp 		err = got_error_msg(GOT_ERR_NOT_GIT_REPO,
823 13b2bc37 2022-10-23 stsp 		    "bare git repository required");
824 13b2bc37 2022-10-23 stsp 		goto done;
825 13b2bc37 2022-10-23 stsp 	}
826 13b2bc37 2022-10-23 stsp 
827 13b2bc37 2022-10-23 stsp 	got_repo_temp_fds_set(repo_read.repo, temp_fds);
828 13b2bc37 2022-10-23 stsp 
829 13b2bc37 2022-10-23 stsp 	signal(SIGINT, catch_sigint);
830 13b2bc37 2022-10-23 stsp 	signal(SIGTERM, catch_sigterm);
831 13b2bc37 2022-10-23 stsp 	signal(SIGPIPE, SIG_IGN);
832 13b2bc37 2022-10-23 stsp 	signal(SIGHUP, SIG_IGN);
833 13b2bc37 2022-10-23 stsp 
834 8c6fc146 2022-11-17 stsp 	imsg_init(&iev.ibuf, GOTD_FILENO_MSG_PIPE);
835 13b2bc37 2022-10-23 stsp 	iev.handler = repo_read_dispatch;
836 13b2bc37 2022-10-23 stsp 	iev.events = EV_READ;
837 13b2bc37 2022-10-23 stsp 	iev.handler_arg = NULL;
838 13b2bc37 2022-10-23 stsp 	event_set(&iev.ev, iev.ibuf.fd, EV_READ, repo_read_dispatch, &iev);
839 b50a2b46 2022-12-29 stsp 
840 b50a2b46 2022-12-29 stsp 	if (gotd_imsg_compose_event(&iev, GOTD_IMSG_REPO_CHILD_READY,
841 b50a2b46 2022-12-29 stsp 	    PROC_REPO_READ, -1, NULL, 0) == -1) {
842 b50a2b46 2022-12-29 stsp 		err = got_error_from_errno("imsg compose REPO_CHILD_READY");
843 13b2bc37 2022-10-23 stsp 		goto done;
844 13b2bc37 2022-10-23 stsp 	}
845 13b2bc37 2022-10-23 stsp 
846 13b2bc37 2022-10-23 stsp 	event_dispatch();
847 13b2bc37 2022-10-23 stsp done:
848 13b2bc37 2022-10-23 stsp 	if (err)
849 13b2bc37 2022-10-23 stsp 		log_warnx("%s: %s", title, err->msg);
850 13b2bc37 2022-10-23 stsp 	repo_read_shutdown();
851 13b2bc37 2022-10-23 stsp }
852 13b2bc37 2022-10-23 stsp 
853 13b2bc37 2022-10-23 stsp void
854 13b2bc37 2022-10-23 stsp repo_read_shutdown(void)
855 13b2bc37 2022-10-23 stsp {
856 13b2bc37 2022-10-23 stsp 	log_debug("%s: shutting down", repo_read.title);
857 13b2bc37 2022-10-23 stsp 	if (repo_read.repo)
858 13b2bc37 2022-10-23 stsp 		got_repo_close(repo_read.repo);
859 13b2bc37 2022-10-23 stsp 	got_repo_pack_fds_close(repo_read.pack_fds);
860 13b2bc37 2022-10-23 stsp 	got_repo_temp_fds_close(repo_read.temp_fds);
861 13b2bc37 2022-10-23 stsp 	exit(0);
862 13b2bc37 2022-10-23 stsp }