1 3efd8e31 2022-10-23 thomas /*
  2 3efd8e31 2022-10-23 thomas  * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
  3 3efd8e31 2022-10-23 thomas  *
  4 3efd8e31 2022-10-23 thomas  * Permission to use, copy, modify, and distribute this software for any
  5 3efd8e31 2022-10-23 thomas  * purpose with or without fee is hereby granted, provided that the above
  6 3efd8e31 2022-10-23 thomas  * copyright notice and this permission notice appear in all copies.
  7 3efd8e31 2022-10-23 thomas  *
  8 3efd8e31 2022-10-23 thomas  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 3efd8e31 2022-10-23 thomas  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 3efd8e31 2022-10-23 thomas  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 3efd8e31 2022-10-23 thomas  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 3efd8e31 2022-10-23 thomas  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 3efd8e31 2022-10-23 thomas  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 3efd8e31 2022-10-23 thomas  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 3efd8e31 2022-10-23 thomas  */
 16 3efd8e31 2022-10-23 thomas 
 17 3efd8e31 2022-10-23 thomas #include <sys/queue.h>
 18 3efd8e31 2022-10-23 thomas #include <sys/types.h>
 19 3efd8e31 2022-10-23 thomas 
 20 3efd8e31 2022-10-23 thomas #include <event.h>
 21 3efd8e31 2022-10-23 thomas #include <errno.h>
 22 3efd8e31 2022-10-23 thomas #include <imsg.h>
 23 3efd8e31 2022-10-23 thomas #include <signal.h>
 24 3efd8e31 2022-10-23 thomas #include <stdlib.h>
 25 3efd8e31 2022-10-23 thomas #include <limits.h>
 26 3efd8e31 2022-10-23 thomas #include <poll.h>
 27 3efd8e31 2022-10-23 thomas #include <sha1.h>
 28 3efd8e31 2022-10-23 thomas #include <siphash.h>
 29 3efd8e31 2022-10-23 thomas #include <stdio.h>
 30 3efd8e31 2022-10-23 thomas #include <string.h>
 31 3efd8e31 2022-10-23 thomas #include <unistd.h>
 32 3efd8e31 2022-10-23 thomas 
 33 3efd8e31 2022-10-23 thomas #include "got_error.h"
 34 3efd8e31 2022-10-23 thomas #include "got_cancel.h"
 35 3efd8e31 2022-10-23 thomas #include "got_object.h"
 36 3efd8e31 2022-10-23 thomas #include "got_repository.h"
 37 3efd8e31 2022-10-23 thomas #include "got_reference.h"
 38 3efd8e31 2022-10-23 thomas #include "got_repository_admin.h"
 39 3efd8e31 2022-10-23 thomas 
 40 3efd8e31 2022-10-23 thomas #include "got_lib_delta.h"
 41 3efd8e31 2022-10-23 thomas #include "got_lib_object.h"
 42 3efd8e31 2022-10-23 thomas #include "got_lib_object_idset.h"
 43 3efd8e31 2022-10-23 thomas #include "got_lib_sha1.h"
 44 3efd8e31 2022-10-23 thomas #include "got_lib_pack.h"
 45 3efd8e31 2022-10-23 thomas #include "got_lib_ratelimit.h"
 46 3efd8e31 2022-10-23 thomas #include "got_lib_pack_create.h"
 47 3efd8e31 2022-10-23 thomas #include "got_lib_poll.h"
 48 3efd8e31 2022-10-23 thomas 
 49 3efd8e31 2022-10-23 thomas #include "log.h"
 50 3efd8e31 2022-10-23 thomas #include "gotd.h"
 51 3efd8e31 2022-10-23 thomas #include "repo_read.h"
 52 3efd8e31 2022-10-23 thomas 
 53 3efd8e31 2022-10-23 thomas #ifndef nitems
 54 3efd8e31 2022-10-23 thomas #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
 55 3efd8e31 2022-10-23 thomas #endif
 56 3efd8e31 2022-10-23 thomas 
 57 3efd8e31 2022-10-23 thomas static struct repo_read {
 58 3efd8e31 2022-10-23 thomas 	pid_t pid;
 59 3efd8e31 2022-10-23 thomas 	const char *title;
 60 3efd8e31 2022-10-23 thomas 	struct got_repository *repo;
 61 3efd8e31 2022-10-23 thomas 	int *pack_fds;
 62 3efd8e31 2022-10-23 thomas 	int *temp_fds;
 63 3efd8e31 2022-10-23 thomas } repo_read;
 64 3efd8e31 2022-10-23 thomas 
 65 9148c8a7 2023-01-02 thomas static struct repo_read_client {
 66 3efd8e31 2022-10-23 thomas 	uint32_t			 id;
 67 3efd8e31 2022-10-23 thomas 	int				 fd;
 68 3efd8e31 2022-10-23 thomas 	int				 delta_cache_fd;
 69 3efd8e31 2022-10-23 thomas 	int				 report_progress;
 70 cc4cc677 2022-10-28 thomas 	int				 pack_pipe;
 71 3efd8e31 2022-10-23 thomas 	struct gotd_object_id_array	 want_ids;
 72 3efd8e31 2022-10-23 thomas 	struct gotd_object_id_array	 have_ids;
 73 9148c8a7 2023-01-02 thomas } repo_read_client;
 74 3efd8e31 2022-10-23 thomas 
 75 3efd8e31 2022-10-23 thomas static volatile sig_atomic_t sigint_received;
 76 3efd8e31 2022-10-23 thomas static volatile sig_atomic_t sigterm_received;
 77 3efd8e31 2022-10-23 thomas 
 78 3efd8e31 2022-10-23 thomas static void
 79 3efd8e31 2022-10-23 thomas catch_sigint(int signo)
 80 3efd8e31 2022-10-23 thomas {
 81 3efd8e31 2022-10-23 thomas 	sigint_received = 1;
 82 3efd8e31 2022-10-23 thomas }
 83 3efd8e31 2022-10-23 thomas 
 84 3efd8e31 2022-10-23 thomas static void
 85 3efd8e31 2022-10-23 thomas catch_sigterm(int signo)
 86 3efd8e31 2022-10-23 thomas {
 87 3efd8e31 2022-10-23 thomas 	sigterm_received = 1;
 88 3efd8e31 2022-10-23 thomas }
 89 3efd8e31 2022-10-23 thomas 
 90 3efd8e31 2022-10-23 thomas static const struct got_error *
 91 3efd8e31 2022-10-23 thomas check_cancelled(void *arg)
 92 3efd8e31 2022-10-23 thomas {
 93 3efd8e31 2022-10-23 thomas 	if (sigint_received || sigterm_received)
 94 3efd8e31 2022-10-23 thomas 		return got_error(GOT_ERR_CANCELLED);
 95 3efd8e31 2022-10-23 thomas 
 96 3efd8e31 2022-10-23 thomas 	return NULL;
 97 3efd8e31 2022-10-23 thomas }
 98 3efd8e31 2022-10-23 thomas 
 99 3efd8e31 2022-10-23 thomas static const struct got_error *
100 a7e9cbc6 2022-11-08 thomas send_symref(struct got_reference *symref, struct got_object_id *target_id,
101 a7e9cbc6 2022-11-08 thomas     struct imsgbuf *ibuf)
102 3efd8e31 2022-10-23 thomas {
103 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
104 3efd8e31 2022-10-23 thomas 	struct gotd_imsg_symref isymref;
105 3efd8e31 2022-10-23 thomas 	const char *refname = got_ref_get_name(symref);
106 3efd8e31 2022-10-23 thomas 	const char *target = got_ref_get_symref_target(symref);
107 3efd8e31 2022-10-23 thomas 	size_t len;
108 3efd8e31 2022-10-23 thomas 	struct ibuf *wbuf;
109 3efd8e31 2022-10-23 thomas 
110 3efd8e31 2022-10-23 thomas 	memset(&isymref, 0, sizeof(isymref));
111 3efd8e31 2022-10-23 thomas 	isymref.name_len = strlen(refname);
112 3efd8e31 2022-10-23 thomas 	isymref.target_len = strlen(target);
113 3efd8e31 2022-10-23 thomas 	memcpy(isymref.target_id, target_id->sha1, sizeof(isymref.target_id));
114 3efd8e31 2022-10-23 thomas 
115 3efd8e31 2022-10-23 thomas 	len = sizeof(isymref) + isymref.name_len + isymref.target_len;
116 3efd8e31 2022-10-23 thomas 	if (len > MAX_IMSGSIZE - IMSG_HEADER_SIZE) {
117 3efd8e31 2022-10-23 thomas 		err = got_error(GOT_ERR_NO_SPACE);
118 3efd8e31 2022-10-23 thomas 		goto done;
119 3efd8e31 2022-10-23 thomas 	}
120 3efd8e31 2022-10-23 thomas 
121 3efd8e31 2022-10-23 thomas 	wbuf = imsg_create(ibuf, GOTD_IMSG_SYMREF, 0, 0, len);
122 3efd8e31 2022-10-23 thomas 	if (wbuf == NULL) {
123 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("imsg_create SYMREF");
124 3efd8e31 2022-10-23 thomas 		goto done;
125 3efd8e31 2022-10-23 thomas 	}
126 3efd8e31 2022-10-23 thomas 
127 3efd8e31 2022-10-23 thomas 	if (imsg_add(wbuf, &isymref, sizeof(isymref)) == -1) {
128 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("imsg_add SYMREF");
129 3efd8e31 2022-10-23 thomas 		goto done;
130 3efd8e31 2022-10-23 thomas 	}
131 3efd8e31 2022-10-23 thomas 	if (imsg_add(wbuf, refname, isymref.name_len) == -1) {
132 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("imsg_add SYMREF");
133 3efd8e31 2022-10-23 thomas 		goto done;
134 3efd8e31 2022-10-23 thomas 	}
135 3efd8e31 2022-10-23 thomas 	if (imsg_add(wbuf, target, isymref.target_len) == -1) {
136 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("imsg_add SYMREF");
137 3efd8e31 2022-10-23 thomas 		goto done;
138 3efd8e31 2022-10-23 thomas 	}
139 3efd8e31 2022-10-23 thomas 
140 3efd8e31 2022-10-23 thomas 	wbuf->fd = -1;
141 3efd8e31 2022-10-23 thomas 	imsg_close(ibuf, wbuf);
142 3efd8e31 2022-10-23 thomas done:
143 3efd8e31 2022-10-23 thomas 	free(target_id);
144 3efd8e31 2022-10-23 thomas 	return err;
145 3efd8e31 2022-10-23 thomas }
146 3efd8e31 2022-10-23 thomas 
147 3efd8e31 2022-10-23 thomas static const struct got_error *
148 3efd8e31 2022-10-23 thomas send_peeled_tag_ref(struct got_reference *ref, struct got_object *obj,
149 3efd8e31 2022-10-23 thomas     struct imsgbuf *ibuf)
150 3efd8e31 2022-10-23 thomas {
151 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
152 3efd8e31 2022-10-23 thomas 	struct got_tag_object *tag;
153 3efd8e31 2022-10-23 thomas 	size_t namelen, len;
154 3efd8e31 2022-10-23 thomas 	char *peeled_refname = NULL;
155 3efd8e31 2022-10-23 thomas 	struct got_object_id *id;
156 3efd8e31 2022-10-23 thomas 	struct ibuf *wbuf;
157 3efd8e31 2022-10-23 thomas 
158 3efd8e31 2022-10-23 thomas 	err = got_object_tag_open(&tag, repo_read.repo, obj);
159 3efd8e31 2022-10-23 thomas 	if (err)
160 3efd8e31 2022-10-23 thomas 		return err;
161 3efd8e31 2022-10-23 thomas 
162 3efd8e31 2022-10-23 thomas 	if (asprintf(&peeled_refname, "%s^{}", got_ref_get_name(ref)) == -1) {
163 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("asprintf");
164 3efd8e31 2022-10-23 thomas 		goto done;
165 3efd8e31 2022-10-23 thomas 	}
166 3efd8e31 2022-10-23 thomas 
167 3efd8e31 2022-10-23 thomas 	id = got_object_tag_get_object_id(tag);
168 3efd8e31 2022-10-23 thomas 	namelen = strlen(peeled_refname);
169 3efd8e31 2022-10-23 thomas 
170 3efd8e31 2022-10-23 thomas 	len = sizeof(struct gotd_imsg_ref) + namelen;
171 3efd8e31 2022-10-23 thomas 	if (len > MAX_IMSGSIZE - IMSG_HEADER_SIZE) {
172 3efd8e31 2022-10-23 thomas 		err = got_error(GOT_ERR_NO_SPACE);
173 3efd8e31 2022-10-23 thomas 		goto done;
174 3efd8e31 2022-10-23 thomas 	}
175 3efd8e31 2022-10-23 thomas 
176 3efd8e31 2022-10-23 thomas 	wbuf = imsg_create(ibuf, GOTD_IMSG_REF, PROC_REPO_READ,
177 3efd8e31 2022-10-23 thomas 	    repo_read.pid, len);
178 3efd8e31 2022-10-23 thomas 	if (wbuf == NULL) {
179 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("imsg_create MREF");
180 3efd8e31 2022-10-23 thomas 		goto done;
181 3efd8e31 2022-10-23 thomas 	}
182 3efd8e31 2022-10-23 thomas 
183 3efd8e31 2022-10-23 thomas 	/* Keep in sync with struct gotd_imsg_ref definition. */
184 3efd8e31 2022-10-23 thomas 	if (imsg_add(wbuf, id->sha1, SHA1_DIGEST_LENGTH) == -1) {
185 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("imsg_add REF");
186 3efd8e31 2022-10-23 thomas 		goto done;
187 3efd8e31 2022-10-23 thomas 	}
188 3efd8e31 2022-10-23 thomas 	if (imsg_add(wbuf, &namelen, sizeof(namelen)) == -1) {
189 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("imsg_add REF");
190 3efd8e31 2022-10-23 thomas 		goto done;
191 3efd8e31 2022-10-23 thomas 	}
192 3efd8e31 2022-10-23 thomas 	if (imsg_add(wbuf, peeled_refname, namelen) == -1) {
193 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("imsg_add REF");
194 3efd8e31 2022-10-23 thomas 		goto done;
195 3efd8e31 2022-10-23 thomas 	}
196 3efd8e31 2022-10-23 thomas 
197 3efd8e31 2022-10-23 thomas 	wbuf->fd = -1;
198 3efd8e31 2022-10-23 thomas 	imsg_close(ibuf, wbuf);
199 3efd8e31 2022-10-23 thomas done:
200 3efd8e31 2022-10-23 thomas 	got_object_tag_close(tag);
201 3efd8e31 2022-10-23 thomas 	return err;
202 3efd8e31 2022-10-23 thomas }
203 3efd8e31 2022-10-23 thomas 
204 3efd8e31 2022-10-23 thomas static const struct got_error *
205 3efd8e31 2022-10-23 thomas send_ref(struct got_reference *ref, struct imsgbuf *ibuf)
206 3efd8e31 2022-10-23 thomas {
207 3efd8e31 2022-10-23 thomas 	const struct got_error *err;
208 3efd8e31 2022-10-23 thomas 	const char *refname = got_ref_get_name(ref);
209 3efd8e31 2022-10-23 thomas 	size_t namelen;
210 3efd8e31 2022-10-23 thomas 	struct got_object_id *id = NULL;
211 3efd8e31 2022-10-23 thomas 	struct got_object *obj = NULL;
212 3efd8e31 2022-10-23 thomas 	size_t len;
213 3efd8e31 2022-10-23 thomas 	struct ibuf *wbuf;
214 3efd8e31 2022-10-23 thomas 
215 3efd8e31 2022-10-23 thomas 	namelen = strlen(refname);
216 3efd8e31 2022-10-23 thomas 
217 3efd8e31 2022-10-23 thomas 	len = sizeof(struct gotd_imsg_ref) + namelen;
218 3efd8e31 2022-10-23 thomas 	if (len > MAX_IMSGSIZE - IMSG_HEADER_SIZE)
219 3efd8e31 2022-10-23 thomas 		return got_error(GOT_ERR_NO_SPACE);
220 3efd8e31 2022-10-23 thomas 
221 3efd8e31 2022-10-23 thomas 	err = got_ref_resolve(&id, repo_read.repo, ref);
222 3efd8e31 2022-10-23 thomas 	if (err)
223 3efd8e31 2022-10-23 thomas 		return err;
224 3efd8e31 2022-10-23 thomas 
225 3efd8e31 2022-10-23 thomas 	wbuf = imsg_create(ibuf, GOTD_IMSG_REF, PROC_REPO_READ,
226 3efd8e31 2022-10-23 thomas 	    repo_read.pid, len);
227 3efd8e31 2022-10-23 thomas 	if (wbuf == NULL) {
228 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("imsg_create REF");
229 3efd8e31 2022-10-23 thomas 		goto done;
230 3efd8e31 2022-10-23 thomas 	}
231 3efd8e31 2022-10-23 thomas 
232 3efd8e31 2022-10-23 thomas 	/* Keep in sync with struct gotd_imsg_ref definition. */
233 3efd8e31 2022-10-23 thomas 	if (imsg_add(wbuf, id->sha1, SHA1_DIGEST_LENGTH) == -1)
234 3efd8e31 2022-10-23 thomas 		return got_error_from_errno("imsg_add REF");
235 3efd8e31 2022-10-23 thomas 	if (imsg_add(wbuf, &namelen, sizeof(namelen)) == -1)
236 3efd8e31 2022-10-23 thomas 		return got_error_from_errno("imsg_add REF");
237 3efd8e31 2022-10-23 thomas 	if (imsg_add(wbuf, refname, namelen) == -1)
238 3efd8e31 2022-10-23 thomas 		return got_error_from_errno("imsg_add REF");
239 3efd8e31 2022-10-23 thomas 
240 3efd8e31 2022-10-23 thomas 	wbuf->fd = -1;
241 3efd8e31 2022-10-23 thomas 	imsg_close(ibuf, wbuf);
242 3efd8e31 2022-10-23 thomas 
243 3efd8e31 2022-10-23 thomas 	err = got_object_open(&obj, repo_read.repo, id);
244 3efd8e31 2022-10-23 thomas 	if (err)
245 3efd8e31 2022-10-23 thomas 		goto done;
246 3efd8e31 2022-10-23 thomas 	if (obj->type == GOT_OBJ_TYPE_TAG)
247 3efd8e31 2022-10-23 thomas 		err = send_peeled_tag_ref(ref, obj, ibuf);
248 3efd8e31 2022-10-23 thomas done:
249 3efd8e31 2022-10-23 thomas 	if (obj)
250 3efd8e31 2022-10-23 thomas 		got_object_close(obj);
251 3efd8e31 2022-10-23 thomas 	free(id);
252 3efd8e31 2022-10-23 thomas 	return err;
253 3efd8e31 2022-10-23 thomas }
254 3efd8e31 2022-10-23 thomas 
255 3efd8e31 2022-10-23 thomas static const struct got_error *
256 9148c8a7 2023-01-02 thomas list_refs(struct imsg *imsg)
257 3efd8e31 2022-10-23 thomas {
258 3efd8e31 2022-10-23 thomas 	const struct got_error *err;
259 9148c8a7 2023-01-02 thomas 	struct repo_read_client *client = &repo_read_client;
260 3efd8e31 2022-10-23 thomas 	struct got_reflist_head refs;
261 3efd8e31 2022-10-23 thomas 	struct got_reflist_entry *re;
262 3efd8e31 2022-10-23 thomas 	struct gotd_imsg_list_refs_internal ireq;
263 3efd8e31 2022-10-23 thomas 	size_t datalen;
264 3efd8e31 2022-10-23 thomas 	struct gotd_imsg_reflist irefs;
265 3efd8e31 2022-10-23 thomas 	struct imsgbuf ibuf;
266 3efd8e31 2022-10-23 thomas 	int client_fd = imsg->fd;
267 a7e9cbc6 2022-11-08 thomas 	struct got_object_id *head_target_id = NULL;
268 3efd8e31 2022-10-23 thomas 
269 3efd8e31 2022-10-23 thomas 	TAILQ_INIT(&refs);
270 3efd8e31 2022-10-23 thomas 
271 3efd8e31 2022-10-23 thomas 	if (client_fd == -1)
272 3efd8e31 2022-10-23 thomas 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
273 3efd8e31 2022-10-23 thomas 
274 3efd8e31 2022-10-23 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
275 3efd8e31 2022-10-23 thomas 	if (datalen != sizeof(ireq))
276 3efd8e31 2022-10-23 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
277 3efd8e31 2022-10-23 thomas 	memcpy(&ireq, imsg->data, sizeof(ireq));
278 3efd8e31 2022-10-23 thomas 
279 9148c8a7 2023-01-02 thomas 	if (ireq.client_id == 0)
280 9148c8a7 2023-01-02 thomas 		return got_error(GOT_ERR_CLIENT_ID);
281 9148c8a7 2023-01-02 thomas 	if (client->id != 0) {
282 9148c8a7 2023-01-02 thomas 		return got_error_msg(GOT_ERR_CLIENT_ID,
283 9148c8a7 2023-01-02 thomas 		    "duplicate list-refs request");
284 9148c8a7 2023-01-02 thomas 	}
285 9148c8a7 2023-01-02 thomas 	client->id = ireq.client_id;
286 9148c8a7 2023-01-02 thomas 	client->fd = client_fd;
287 9148c8a7 2023-01-02 thomas 	client->delta_cache_fd = -1;
288 9148c8a7 2023-01-02 thomas 	client->pack_pipe = -1;
289 3efd8e31 2022-10-23 thomas 
290 3efd8e31 2022-10-23 thomas 	imsg_init(&ibuf, client_fd);
291 3efd8e31 2022-10-23 thomas 
292 3efd8e31 2022-10-23 thomas 	err = got_ref_list(&refs, repo_read.repo, "",
293 3efd8e31 2022-10-23 thomas 	    got_ref_cmp_by_name, NULL);
294 3efd8e31 2022-10-23 thomas 	if (err)
295 3efd8e31 2022-10-23 thomas 		return err;
296 3efd8e31 2022-10-23 thomas 
297 3efd8e31 2022-10-23 thomas 	memset(&irefs, 0, sizeof(irefs));
298 3efd8e31 2022-10-23 thomas 	TAILQ_FOREACH(re, &refs, entry) {
299 3efd8e31 2022-10-23 thomas 		struct got_object_id *id;
300 3efd8e31 2022-10-23 thomas 		int obj_type;
301 3efd8e31 2022-10-23 thomas 
302 3efd8e31 2022-10-23 thomas 		if (got_ref_is_symbolic(re->ref)) {
303 3efd8e31 2022-10-23 thomas 			const char *refname = got_ref_get_name(re->ref);
304 a7e9cbc6 2022-11-08 thomas 			if (strcmp(refname, GOT_REF_HEAD) != 0)
305 a7e9cbc6 2022-11-08 thomas 				continue;
306 a7e9cbc6 2022-11-08 thomas 			err = got_ref_resolve(&head_target_id, repo_read.repo,
307 a7e9cbc6 2022-11-08 thomas 			    re->ref);
308 a7e9cbc6 2022-11-08 thomas 			if (err) {
309 a7e9cbc6 2022-11-08 thomas 				if (err->code != GOT_ERR_NOT_REF)
310 a7e9cbc6 2022-11-08 thomas 					return err;
311 a7e9cbc6 2022-11-08 thomas 				/*
312 a7e9cbc6 2022-11-08 thomas 				 * HEAD points to a non-existent branch.
313 a7e9cbc6 2022-11-08 thomas 				 * Do not advertise it.
314 a7e9cbc6 2022-11-08 thomas 				 * Matches git-daemon's behaviour.
315 a7e9cbc6 2022-11-08 thomas 				 */
316 a7e9cbc6 2022-11-08 thomas 				head_target_id = NULL;
317 a7e9cbc6 2022-11-08 thomas 				err = NULL;
318 a7e9cbc6 2022-11-08 thomas 			} else
319 3efd8e31 2022-10-23 thomas 				irefs.nrefs++;
320 3efd8e31 2022-10-23 thomas 			continue;
321 3efd8e31 2022-10-23 thomas 		}
322 3efd8e31 2022-10-23 thomas 
323 3efd8e31 2022-10-23 thomas 		irefs.nrefs++;
324 3efd8e31 2022-10-23 thomas 
325 3efd8e31 2022-10-23 thomas 		/* Account for a peeled tag refs. */
326 3efd8e31 2022-10-23 thomas 		err = got_ref_resolve(&id, repo_read.repo, re->ref);
327 3efd8e31 2022-10-23 thomas 		if (err)
328 3efd8e31 2022-10-23 thomas 			goto done;
329 3efd8e31 2022-10-23 thomas 		err = got_object_get_type(&obj_type, repo_read.repo, id);	
330 3efd8e31 2022-10-23 thomas 		free(id);
331 3efd8e31 2022-10-23 thomas 		if (err)
332 3efd8e31 2022-10-23 thomas 			goto done;
333 3efd8e31 2022-10-23 thomas 		if (obj_type == GOT_OBJ_TYPE_TAG)
334 3efd8e31 2022-10-23 thomas 			irefs.nrefs++;
335 3efd8e31 2022-10-23 thomas 	}
336 3efd8e31 2022-10-23 thomas 
337 3efd8e31 2022-10-23 thomas 	if (imsg_compose(&ibuf, GOTD_IMSG_REFLIST, PROC_REPO_READ,
338 3efd8e31 2022-10-23 thomas 	    repo_read.pid, -1, &irefs, sizeof(irefs)) == -1) {
339 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("imsg_compose REFLIST");
340 3efd8e31 2022-10-23 thomas 		goto done;
341 3efd8e31 2022-10-23 thomas 	}
342 3efd8e31 2022-10-23 thomas 
343 3efd8e31 2022-10-23 thomas 	/*
344 3efd8e31 2022-10-23 thomas 	 * Send the HEAD symref first. In Git-protocol versions < 2
345 3efd8e31 2022-10-23 thomas 	 * the HEAD symref must be announced on the initial line of
346 3efd8e31 2022-10-23 thomas 	 * the server's ref advertisement.
347 3efd8e31 2022-10-23 thomas 	 * For now, we do not advertise symrefs other than HEAD.
348 3efd8e31 2022-10-23 thomas 	 */
349 3efd8e31 2022-10-23 thomas 	TAILQ_FOREACH(re, &refs, entry) {
350 3efd8e31 2022-10-23 thomas 		if (!got_ref_is_symbolic(re->ref) ||
351 a7e9cbc6 2022-11-08 thomas 		    strcmp(got_ref_get_name(re->ref), GOT_REF_HEAD) != 0 ||
352 a7e9cbc6 2022-11-08 thomas 		    head_target_id == NULL)
353 3efd8e31 2022-10-23 thomas 			continue;
354 a7e9cbc6 2022-11-08 thomas 		err = send_symref(re->ref, head_target_id, &ibuf);
355 3efd8e31 2022-10-23 thomas 		if (err)
356 3efd8e31 2022-10-23 thomas 			goto done;
357 3efd8e31 2022-10-23 thomas 		break;
358 3efd8e31 2022-10-23 thomas 	}
359 3efd8e31 2022-10-23 thomas 	TAILQ_FOREACH(re, &refs, entry) {
360 3efd8e31 2022-10-23 thomas 		if (got_ref_is_symbolic(re->ref))
361 3efd8e31 2022-10-23 thomas 			continue;
362 3efd8e31 2022-10-23 thomas 		err = send_ref(re->ref, &ibuf);
363 3efd8e31 2022-10-23 thomas 		if (err)
364 3efd8e31 2022-10-23 thomas 			goto done;
365 3efd8e31 2022-10-23 thomas 	}
366 3efd8e31 2022-10-23 thomas 
367 3efd8e31 2022-10-23 thomas 	err = gotd_imsg_flush(&ibuf);
368 3efd8e31 2022-10-23 thomas done:
369 3efd8e31 2022-10-23 thomas 	got_ref_list_free(&refs);
370 3efd8e31 2022-10-23 thomas 	imsg_clear(&ibuf);
371 3efd8e31 2022-10-23 thomas 	return err;
372 3efd8e31 2022-10-23 thomas }
373 3efd8e31 2022-10-23 thomas 
374 3efd8e31 2022-10-23 thomas static const struct got_error *
375 3efd8e31 2022-10-23 thomas record_object_id(struct gotd_object_id_array *array, struct got_object_id *id)
376 3efd8e31 2022-10-23 thomas {
377 3efd8e31 2022-10-23 thomas 	const size_t alloc_chunksz = 256;
378 3efd8e31 2022-10-23 thomas 
379 3efd8e31 2022-10-23 thomas 	if (array->ids == NULL) {
380 3efd8e31 2022-10-23 thomas 		array->ids = reallocarray(NULL, alloc_chunksz,
381 3efd8e31 2022-10-23 thomas 		    sizeof(*array->ids));
382 3efd8e31 2022-10-23 thomas 		if (array->ids == NULL)
383 3efd8e31 2022-10-23 thomas 			return got_error_from_errno("reallocarray");
384 3efd8e31 2022-10-23 thomas 		array->nalloc = alloc_chunksz;
385 3efd8e31 2022-10-23 thomas 		array->nids = 0;
386 3efd8e31 2022-10-23 thomas 	} else if (array->nalloc <= array->nids) {
387 3efd8e31 2022-10-23 thomas 		struct got_object_id **new;
388 3efd8e31 2022-10-23 thomas 		new = recallocarray(array->ids, array->nalloc,
389 3efd8e31 2022-10-23 thomas 		    array->nalloc + alloc_chunksz, sizeof(*new));
390 3efd8e31 2022-10-23 thomas 		if (new == NULL)
391 3efd8e31 2022-10-23 thomas 			return got_error_from_errno("recallocarray");
392 3efd8e31 2022-10-23 thomas 		array->ids = new;
393 3efd8e31 2022-10-23 thomas 		array->nalloc += alloc_chunksz;
394 3efd8e31 2022-10-23 thomas 	}
395 3efd8e31 2022-10-23 thomas 
396 3efd8e31 2022-10-23 thomas 	array->ids[array->nids] = got_object_id_dup(id);
397 3efd8e31 2022-10-23 thomas 	if (array->ids[array->nids] == NULL)
398 3efd8e31 2022-10-23 thomas 		return got_error_from_errno("got_object_id_dup");
399 3efd8e31 2022-10-23 thomas 	array->nids++;
400 3efd8e31 2022-10-23 thomas 	return NULL;
401 3efd8e31 2022-10-23 thomas }
402 3efd8e31 2022-10-23 thomas 
403 3efd8e31 2022-10-23 thomas static void
404 3efd8e31 2022-10-23 thomas free_object_ids(struct gotd_object_id_array *array)
405 3efd8e31 2022-10-23 thomas {
406 3efd8e31 2022-10-23 thomas 	size_t i;
407 3efd8e31 2022-10-23 thomas 
408 3efd8e31 2022-10-23 thomas 	for (i = 0; i < array->nids; i++)
409 3efd8e31 2022-10-23 thomas 		free(array->ids[i]);
410 3efd8e31 2022-10-23 thomas 	free(array->ids);
411 3efd8e31 2022-10-23 thomas 
412 3efd8e31 2022-10-23 thomas 	array->ids = NULL;
413 3efd8e31 2022-10-23 thomas 	array->nalloc = 0;
414 3efd8e31 2022-10-23 thomas 	array->nids = 0;
415 3efd8e31 2022-10-23 thomas }
416 3efd8e31 2022-10-23 thomas 
417 3efd8e31 2022-10-23 thomas static const struct got_error *
418 9148c8a7 2023-01-02 thomas recv_want(struct imsg *imsg)
419 3efd8e31 2022-10-23 thomas {
420 3efd8e31 2022-10-23 thomas 	const struct got_error *err;
421 9148c8a7 2023-01-02 thomas 	struct repo_read_client *client = &repo_read_client;
422 3efd8e31 2022-10-23 thomas 	struct gotd_imsg_want iwant;
423 3efd8e31 2022-10-23 thomas 	size_t datalen;
424 3efd8e31 2022-10-23 thomas 	char hex[SHA1_DIGEST_STRING_LENGTH];
425 3efd8e31 2022-10-23 thomas 	struct got_object_id id;
426 3efd8e31 2022-10-23 thomas 	int obj_type;
427 3efd8e31 2022-10-23 thomas 	struct imsgbuf ibuf;
428 3efd8e31 2022-10-23 thomas 
429 3efd8e31 2022-10-23 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
430 3efd8e31 2022-10-23 thomas 	if (datalen != sizeof(iwant))
431 3efd8e31 2022-10-23 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
432 3efd8e31 2022-10-23 thomas 	memcpy(&iwant, imsg->data, sizeof(iwant));
433 3efd8e31 2022-10-23 thomas 
434 3efd8e31 2022-10-23 thomas 	memset(&id, 0, sizeof(id));
435 3efd8e31 2022-10-23 thomas 	memcpy(id.sha1, iwant.object_id, SHA1_DIGEST_LENGTH);
436 3efd8e31 2022-10-23 thomas 
437 3efd8e31 2022-10-23 thomas 	if (log_getverbose() > 0 &&
438 3efd8e31 2022-10-23 thomas 	    got_sha1_digest_to_str(id.sha1, hex, sizeof(hex)))
439 3efd8e31 2022-10-23 thomas 		log_debug("client wants %s", hex);
440 3efd8e31 2022-10-23 thomas 
441 9148c8a7 2023-01-02 thomas 	imsg_init(&ibuf, client->fd);
442 3efd8e31 2022-10-23 thomas 
443 3efd8e31 2022-10-23 thomas 	err = got_object_get_type(&obj_type, repo_read.repo, &id);
444 3efd8e31 2022-10-23 thomas 	if (err)
445 3efd8e31 2022-10-23 thomas 		return err;
446 3efd8e31 2022-10-23 thomas 
447 3efd8e31 2022-10-23 thomas 	if (obj_type != GOT_OBJ_TYPE_COMMIT &&
448 3efd8e31 2022-10-23 thomas 	    obj_type != GOT_OBJ_TYPE_TAG)
449 3efd8e31 2022-10-23 thomas 		return got_error(GOT_ERR_OBJ_TYPE);
450 3efd8e31 2022-10-23 thomas 
451 9148c8a7 2023-01-02 thomas 	err = record_object_id(&client->want_ids, &id);
452 3efd8e31 2022-10-23 thomas 	if (err)
453 3efd8e31 2022-10-23 thomas 		return err;
454 3efd8e31 2022-10-23 thomas 
455 3efd8e31 2022-10-23 thomas 	gotd_imsg_send_ack(&id, &ibuf, PROC_REPO_READ, repo_read.pid);
456 3efd8e31 2022-10-23 thomas 	imsg_clear(&ibuf);
457 3efd8e31 2022-10-23 thomas 	return err;
458 3efd8e31 2022-10-23 thomas }
459 3efd8e31 2022-10-23 thomas 
460 3efd8e31 2022-10-23 thomas static const struct got_error *
461 9148c8a7 2023-01-02 thomas recv_have(struct imsg *imsg)
462 3efd8e31 2022-10-23 thomas {
463 3efd8e31 2022-10-23 thomas 	const struct got_error *err;
464 9148c8a7 2023-01-02 thomas 	struct repo_read_client *client = &repo_read_client;
465 3efd8e31 2022-10-23 thomas 	struct gotd_imsg_have ihave;
466 3efd8e31 2022-10-23 thomas 	size_t datalen;
467 3efd8e31 2022-10-23 thomas 	char hex[SHA1_DIGEST_STRING_LENGTH];
468 3efd8e31 2022-10-23 thomas 	struct got_object_id id;
469 3efd8e31 2022-10-23 thomas 	int obj_type;
470 3efd8e31 2022-10-23 thomas 	struct imsgbuf ibuf;
471 3efd8e31 2022-10-23 thomas 
472 3efd8e31 2022-10-23 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
473 3efd8e31 2022-10-23 thomas 	if (datalen != sizeof(ihave))
474 3efd8e31 2022-10-23 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
475 3efd8e31 2022-10-23 thomas 	memcpy(&ihave, imsg->data, sizeof(ihave));
476 3efd8e31 2022-10-23 thomas 
477 3efd8e31 2022-10-23 thomas 	memset(&id, 0, sizeof(id));
478 3efd8e31 2022-10-23 thomas 	memcpy(id.sha1, ihave.object_id, SHA1_DIGEST_LENGTH);
479 3efd8e31 2022-10-23 thomas 
480 3efd8e31 2022-10-23 thomas 	if (log_getverbose() > 0 &&
481 3efd8e31 2022-10-23 thomas 	    got_sha1_digest_to_str(id.sha1, hex, sizeof(hex)))
482 3efd8e31 2022-10-23 thomas 		log_debug("client has %s", hex);
483 3efd8e31 2022-10-23 thomas 
484 9148c8a7 2023-01-02 thomas 	imsg_init(&ibuf, client->fd);
485 3efd8e31 2022-10-23 thomas 
486 3efd8e31 2022-10-23 thomas 	err = got_object_get_type(&obj_type, repo_read.repo, &id);
487 3efd8e31 2022-10-23 thomas 	if (err) {
488 3efd8e31 2022-10-23 thomas 		if (err->code == GOT_ERR_NO_OBJ) {
489 3efd8e31 2022-10-23 thomas 			gotd_imsg_send_nak(&id, &ibuf,
490 3efd8e31 2022-10-23 thomas 			    PROC_REPO_READ, repo_read.pid);
491 3efd8e31 2022-10-23 thomas 			err = NULL;
492 3efd8e31 2022-10-23 thomas 		}
493 3efd8e31 2022-10-23 thomas 		goto done;
494 3efd8e31 2022-10-23 thomas 	}
495 3efd8e31 2022-10-23 thomas 
496 3efd8e31 2022-10-23 thomas 	if (obj_type != GOT_OBJ_TYPE_COMMIT &&
497 3efd8e31 2022-10-23 thomas 	    obj_type != GOT_OBJ_TYPE_TAG) {
498 3efd8e31 2022-10-23 thomas 		gotd_imsg_send_nak(&id, &ibuf, PROC_REPO_READ, repo_read.pid);
499 3efd8e31 2022-10-23 thomas 		err = got_error(GOT_ERR_OBJ_TYPE);
500 3efd8e31 2022-10-23 thomas 		goto done;
501 3efd8e31 2022-10-23 thomas 	}
502 3efd8e31 2022-10-23 thomas 
503 9148c8a7 2023-01-02 thomas 	err = record_object_id(&client->have_ids, &id);
504 3efd8e31 2022-10-23 thomas 	if (err)
505 3efd8e31 2022-10-23 thomas 		return err;
506 3efd8e31 2022-10-23 thomas 
507 3efd8e31 2022-10-23 thomas 	gotd_imsg_send_ack(&id, &ibuf, PROC_REPO_READ, repo_read.pid);
508 3efd8e31 2022-10-23 thomas done:
509 3efd8e31 2022-10-23 thomas 	imsg_clear(&ibuf);
510 3efd8e31 2022-10-23 thomas 	return err;
511 3efd8e31 2022-10-23 thomas }
512 3efd8e31 2022-10-23 thomas 
513 3efd8e31 2022-10-23 thomas struct repo_read_pack_progress_arg {
514 3efd8e31 2022-10-23 thomas 	int report_progress;
515 3efd8e31 2022-10-23 thomas 	struct imsgbuf *ibuf;
516 3efd8e31 2022-10-23 thomas 	int sent_ready;
517 3efd8e31 2022-10-23 thomas };
518 3efd8e31 2022-10-23 thomas 
519 3efd8e31 2022-10-23 thomas static const struct got_error *
520 3efd8e31 2022-10-23 thomas pack_progress(void *arg, int ncolored, int nfound, int ntrees,
521 3efd8e31 2022-10-23 thomas     off_t packfile_size, int ncommits, int nobj_total, int nobj_deltify,
522 3efd8e31 2022-10-23 thomas     int nobj_written)
523 3efd8e31 2022-10-23 thomas {
524 3efd8e31 2022-10-23 thomas 	struct repo_read_pack_progress_arg *a = arg;
525 3efd8e31 2022-10-23 thomas 	struct gotd_imsg_packfile_progress iprog;
526 3efd8e31 2022-10-23 thomas 	int ret;
527 3efd8e31 2022-10-23 thomas 
528 3efd8e31 2022-10-23 thomas 	if (!a->report_progress)
529 3efd8e31 2022-10-23 thomas 		return NULL;
530 3efd8e31 2022-10-23 thomas 	if (packfile_size > 0 && a->sent_ready)
531 3efd8e31 2022-10-23 thomas 		return NULL;
532 3efd8e31 2022-10-23 thomas 
533 3efd8e31 2022-10-23 thomas 	memset(&iprog, 0, sizeof(iprog));
534 3efd8e31 2022-10-23 thomas 	iprog.ncolored = ncolored;
535 3efd8e31 2022-10-23 thomas 	iprog.nfound = nfound;
536 3efd8e31 2022-10-23 thomas 	iprog.ntrees = ntrees;
537 3efd8e31 2022-10-23 thomas 	iprog.packfile_size = packfile_size;
538 3efd8e31 2022-10-23 thomas 	iprog.ncommits = ncommits;
539 3efd8e31 2022-10-23 thomas 	iprog.nobj_total = nobj_total;
540 3efd8e31 2022-10-23 thomas 	iprog.nobj_deltify = nobj_deltify;
541 3efd8e31 2022-10-23 thomas 	iprog.nobj_written = nobj_written;
542 3efd8e31 2022-10-23 thomas 
543 3efd8e31 2022-10-23 thomas 	/* Using synchronous writes since we are blocking the event loop. */
544 3efd8e31 2022-10-23 thomas 	if (packfile_size == 0) {
545 3efd8e31 2022-10-23 thomas 		ret = imsg_compose(a->ibuf, GOTD_IMSG_PACKFILE_PROGRESS,
546 3efd8e31 2022-10-23 thomas 		    PROC_REPO_READ, repo_read.pid, -1, &iprog, sizeof(iprog));
547 3efd8e31 2022-10-23 thomas 		if (ret == -1) {
548 3efd8e31 2022-10-23 thomas 			return got_error_from_errno("imsg compose "
549 3efd8e31 2022-10-23 thomas 			    "PACKFILE_PROGRESS");
550 3efd8e31 2022-10-23 thomas 		}	
551 3efd8e31 2022-10-23 thomas 	} else {
552 3efd8e31 2022-10-23 thomas 		a->sent_ready = 1;
553 3efd8e31 2022-10-23 thomas 		ret = imsg_compose(a->ibuf, GOTD_IMSG_PACKFILE_READY,
554 3efd8e31 2022-10-23 thomas 		    PROC_REPO_READ, repo_read.pid, -1, &iprog, sizeof(iprog));
555 3efd8e31 2022-10-23 thomas 		if (ret == -1) {
556 3efd8e31 2022-10-23 thomas 			return got_error_from_errno("imsg compose "
557 3efd8e31 2022-10-23 thomas 			    "PACKFILE_READY");
558 3efd8e31 2022-10-23 thomas 		}
559 3efd8e31 2022-10-23 thomas 	}
560 3efd8e31 2022-10-23 thomas 
561 3efd8e31 2022-10-23 thomas 	return gotd_imsg_flush(a->ibuf);
562 3efd8e31 2022-10-23 thomas }
563 3efd8e31 2022-10-23 thomas 
564 3efd8e31 2022-10-23 thomas static const struct got_error *
565 9148c8a7 2023-01-02 thomas receive_delta_cache_fd(struct imsg *imsg,
566 3efd8e31 2022-10-23 thomas     struct gotd_imsgev *iev)
567 3efd8e31 2022-10-23 thomas {
568 9148c8a7 2023-01-02 thomas 	struct repo_read_client *client = &repo_read_client;
569 3efd8e31 2022-10-23 thomas 	struct gotd_imsg_send_packfile ireq;
570 3efd8e31 2022-10-23 thomas 	size_t datalen;
571 3efd8e31 2022-10-23 thomas 
572 3efd8e31 2022-10-23 thomas 	log_debug("receving delta cache file");
573 3efd8e31 2022-10-23 thomas 
574 3efd8e31 2022-10-23 thomas 	if (imsg->fd == -1)
575 3efd8e31 2022-10-23 thomas 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
576 3efd8e31 2022-10-23 thomas 
577 3efd8e31 2022-10-23 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
578 3efd8e31 2022-10-23 thomas 	if (datalen != sizeof(ireq))
579 3efd8e31 2022-10-23 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
580 3efd8e31 2022-10-23 thomas 	memcpy(&ireq, imsg->data, sizeof(ireq));
581 3efd8e31 2022-10-23 thomas 
582 9148c8a7 2023-01-02 thomas 	if (client->delta_cache_fd != -1)
583 3efd8e31 2022-10-23 thomas 		return got_error(GOT_ERR_PRIVSEP_MSG);
584 3efd8e31 2022-10-23 thomas 
585 9148c8a7 2023-01-02 thomas 	client->delta_cache_fd = imsg->fd;
586 9148c8a7 2023-01-02 thomas 	client->report_progress = ireq.report_progress;
587 3efd8e31 2022-10-23 thomas 	return NULL;
588 3efd8e31 2022-10-23 thomas }
589 3efd8e31 2022-10-23 thomas 
590 3efd8e31 2022-10-23 thomas static const struct got_error *
591 9148c8a7 2023-01-02 thomas receive_pack_pipe(struct imsg *imsg, struct gotd_imsgev *iev)
592 3efd8e31 2022-10-23 thomas {
593 9148c8a7 2023-01-02 thomas 	struct repo_read_client *client = &repo_read_client;
594 3efd8e31 2022-10-23 thomas 	struct gotd_imsg_packfile_pipe ireq;
595 3efd8e31 2022-10-23 thomas 	size_t datalen;
596 3efd8e31 2022-10-23 thomas 
597 3efd8e31 2022-10-23 thomas 	log_debug("receving pack pipe descriptor");
598 3efd8e31 2022-10-23 thomas 
599 3efd8e31 2022-10-23 thomas 	if (imsg->fd == -1)
600 3efd8e31 2022-10-23 thomas 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
601 3efd8e31 2022-10-23 thomas 
602 3efd8e31 2022-10-23 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
603 3efd8e31 2022-10-23 thomas 	if (datalen != sizeof(ireq))
604 3efd8e31 2022-10-23 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
605 3efd8e31 2022-10-23 thomas 	memcpy(&ireq, imsg->data, sizeof(ireq));
606 3efd8e31 2022-10-23 thomas 
607 9148c8a7 2023-01-02 thomas 	if (client->pack_pipe != -1)
608 3efd8e31 2022-10-23 thomas 		return got_error(GOT_ERR_PRIVSEP_MSG);
609 3efd8e31 2022-10-23 thomas 
610 9148c8a7 2023-01-02 thomas 	client->pack_pipe = imsg->fd;
611 3efd8e31 2022-10-23 thomas 	return NULL;
612 3efd8e31 2022-10-23 thomas }
613 3efd8e31 2022-10-23 thomas 
614 3efd8e31 2022-10-23 thomas static const struct got_error *
615 9148c8a7 2023-01-02 thomas send_packfile(struct imsg *imsg, struct gotd_imsgev *iev)
616 3efd8e31 2022-10-23 thomas {
617 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
618 9148c8a7 2023-01-02 thomas 	struct repo_read_client *client = &repo_read_client;
619 3efd8e31 2022-10-23 thomas 	struct gotd_imsg_packfile_done idone;
620 3efd8e31 2022-10-23 thomas 	uint8_t packsha1[SHA1_DIGEST_LENGTH];
621 3efd8e31 2022-10-23 thomas 	char hex[SHA1_DIGEST_STRING_LENGTH];
622 3efd8e31 2022-10-23 thomas 	FILE *delta_cache = NULL;
623 3efd8e31 2022-10-23 thomas 	struct imsgbuf ibuf;
624 3efd8e31 2022-10-23 thomas 	struct repo_read_pack_progress_arg pa;
625 3efd8e31 2022-10-23 thomas 	struct got_ratelimit rl;
626 3efd8e31 2022-10-23 thomas 
627 3efd8e31 2022-10-23 thomas 	log_debug("packfile request received");
628 3efd8e31 2022-10-23 thomas 
629 3efd8e31 2022-10-23 thomas 	got_ratelimit_init(&rl, 2, 0);
630 3efd8e31 2022-10-23 thomas 
631 cc4cc677 2022-10-28 thomas 	if (client->delta_cache_fd == -1 || client->pack_pipe == -1)
632 3efd8e31 2022-10-23 thomas 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
633 3efd8e31 2022-10-23 thomas 
634 3efd8e31 2022-10-23 thomas 	imsg_init(&ibuf, client->fd);
635 3efd8e31 2022-10-23 thomas 
636 3efd8e31 2022-10-23 thomas 	delta_cache = fdopen(client->delta_cache_fd, "w+");
637 3efd8e31 2022-10-23 thomas 	if (delta_cache == NULL) {
638 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("fdopen");
639 3efd8e31 2022-10-23 thomas 		goto done;
640 3efd8e31 2022-10-23 thomas 	}
641 3efd8e31 2022-10-23 thomas 	client->delta_cache_fd = -1;
642 3efd8e31 2022-10-23 thomas 
643 3efd8e31 2022-10-23 thomas 	memset(&pa, 0, sizeof(pa));
644 3efd8e31 2022-10-23 thomas 	pa.ibuf = &ibuf;
645 3efd8e31 2022-10-23 thomas 	pa.report_progress = client->report_progress;
646 3efd8e31 2022-10-23 thomas 
647 cc4cc677 2022-10-28 thomas 	err = got_pack_create(packsha1, client->pack_pipe, delta_cache,
648 3efd8e31 2022-10-23 thomas 	    client->have_ids.ids, client->have_ids.nids,
649 3efd8e31 2022-10-23 thomas 	    client->want_ids.ids, client->want_ids.nids,
650 3efd8e31 2022-10-23 thomas 	    repo_read.repo, 0, 1, pack_progress, &pa, &rl,
651 3efd8e31 2022-10-23 thomas 	    check_cancelled, NULL);
652 3efd8e31 2022-10-23 thomas 	if (err)
653 3efd8e31 2022-10-23 thomas 		goto done;
654 3efd8e31 2022-10-23 thomas 	
655 3efd8e31 2022-10-23 thomas 	if (log_getverbose() > 0 &&
656 3efd8e31 2022-10-23 thomas 	    got_sha1_digest_to_str(packsha1, hex, sizeof(hex)))
657 3efd8e31 2022-10-23 thomas 		log_debug("sent pack-%s.pack", hex);
658 3efd8e31 2022-10-23 thomas 
659 3efd8e31 2022-10-23 thomas 	memset(&idone, 0, sizeof(idone));
660 3efd8e31 2022-10-23 thomas 	idone.client_id = client->id;
661 3efd8e31 2022-10-23 thomas 	if (gotd_imsg_compose_event(iev, GOTD_IMSG_PACKFILE_DONE,
662 3efd8e31 2022-10-23 thomas 	    PROC_REPO_READ, -1, &idone, sizeof(idone)) == -1)
663 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("imsg compose PACKFILE_DONE");
664 3efd8e31 2022-10-23 thomas done:
665 3efd8e31 2022-10-23 thomas 	if (delta_cache != NULL && fclose(delta_cache) == EOF && err == NULL)
666 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("fclose");
667 3efd8e31 2022-10-23 thomas 	imsg_clear(&ibuf);
668 3efd8e31 2022-10-23 thomas 	return err;
669 3efd8e31 2022-10-23 thomas }
670 3efd8e31 2022-10-23 thomas 
671 3efd8e31 2022-10-23 thomas static const struct got_error *
672 3efd8e31 2022-10-23 thomas recv_disconnect(struct imsg *imsg)
673 3efd8e31 2022-10-23 thomas {
674 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
675 3efd8e31 2022-10-23 thomas 	struct gotd_imsg_disconnect idisconnect;
676 3efd8e31 2022-10-23 thomas 	size_t datalen;
677 9148c8a7 2023-01-02 thomas 	int delta_cache_fd, pack_pipe;
678 9148c8a7 2023-01-02 thomas 	struct repo_read_client *client = &repo_read_client;
679 3efd8e31 2022-10-23 thomas 
680 3efd8e31 2022-10-23 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
681 3efd8e31 2022-10-23 thomas 	if (datalen != sizeof(idisconnect))
682 3efd8e31 2022-10-23 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
683 3efd8e31 2022-10-23 thomas 	memcpy(&idisconnect, imsg->data, sizeof(idisconnect));
684 3efd8e31 2022-10-23 thomas 
685 3efd8e31 2022-10-23 thomas 	log_debug("client disconnecting");
686 3efd8e31 2022-10-23 thomas 
687 3efd8e31 2022-10-23 thomas 	free_object_ids(&client->have_ids);
688 3efd8e31 2022-10-23 thomas 	free_object_ids(&client->want_ids);
689 9148c8a7 2023-01-02 thomas 	if (close(client->fd) == -1)
690 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("close");
691 9148c8a7 2023-01-02 thomas 	delta_cache_fd = client->delta_cache_fd;
692 3efd8e31 2022-10-23 thomas 	if (delta_cache_fd != -1 && close(delta_cache_fd) == -1 && err == NULL)
693 3efd8e31 2022-10-23 thomas 		return got_error_from_errno("close");
694 9148c8a7 2023-01-02 thomas 	pack_pipe = client->pack_pipe;
695 cc4cc677 2022-10-28 thomas 	if (pack_pipe != -1 && close(pack_pipe) == -1 && err == NULL)
696 3efd8e31 2022-10-23 thomas 		return got_error_from_errno("close");
697 3efd8e31 2022-10-23 thomas 	return err;
698 3efd8e31 2022-10-23 thomas }
699 3efd8e31 2022-10-23 thomas 
700 3efd8e31 2022-10-23 thomas static void
701 3efd8e31 2022-10-23 thomas repo_read_dispatch(int fd, short event, void *arg)
702 3efd8e31 2022-10-23 thomas {
703 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
704 3efd8e31 2022-10-23 thomas 	struct gotd_imsgev *iev = arg;
705 3efd8e31 2022-10-23 thomas 	struct imsgbuf *ibuf = &iev->ibuf;
706 3efd8e31 2022-10-23 thomas 	struct imsg imsg;
707 3efd8e31 2022-10-23 thomas 	ssize_t n;
708 3efd8e31 2022-10-23 thomas 	int shut = 0;
709 9148c8a7 2023-01-02 thomas 	struct repo_read_client *client = &repo_read_client;
710 3efd8e31 2022-10-23 thomas 
711 3efd8e31 2022-10-23 thomas 	if (event & EV_READ) {
712 3efd8e31 2022-10-23 thomas 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
713 3efd8e31 2022-10-23 thomas 			fatal("imsg_read error");
714 3efd8e31 2022-10-23 thomas 		if (n == 0)	/* Connection closed. */
715 3efd8e31 2022-10-23 thomas 			shut = 1;
716 3efd8e31 2022-10-23 thomas 	}
717 3efd8e31 2022-10-23 thomas 
718 3efd8e31 2022-10-23 thomas 	if (event & EV_WRITE) {
719 3efd8e31 2022-10-23 thomas 		n = msgbuf_write(&ibuf->w);
720 3efd8e31 2022-10-23 thomas 		if (n == -1 && errno != EAGAIN)
721 3efd8e31 2022-10-23 thomas 			fatal("msgbuf_write");
722 3efd8e31 2022-10-23 thomas 		if (n == 0)	/* Connection closed. */
723 3efd8e31 2022-10-23 thomas 			shut = 1;
724 3efd8e31 2022-10-23 thomas 	}
725 3efd8e31 2022-10-23 thomas 
726 3efd8e31 2022-10-23 thomas 	while (err == NULL && check_cancelled(NULL) == NULL) {
727 3efd8e31 2022-10-23 thomas 		if ((n = imsg_get(ibuf, &imsg)) == -1)
728 3efd8e31 2022-10-23 thomas 			fatal("%s: imsg_get", __func__);
729 3efd8e31 2022-10-23 thomas 		if (n == 0)	/* No more messages. */
730 3efd8e31 2022-10-23 thomas 			break;
731 3efd8e31 2022-10-23 thomas 
732 9148c8a7 2023-01-02 thomas 		if (imsg.hdr.type != GOTD_IMSG_LIST_REFS_INTERNAL &&
733 9148c8a7 2023-01-02 thomas 		    client->id == 0) {
734 9148c8a7 2023-01-02 thomas 			err = got_error(GOT_ERR_PRIVSEP_MSG);
735 9148c8a7 2023-01-02 thomas 			break;
736 9148c8a7 2023-01-02 thomas 		}
737 9148c8a7 2023-01-02 thomas 
738 3efd8e31 2022-10-23 thomas 		switch (imsg.hdr.type) {
739 3efd8e31 2022-10-23 thomas 		case GOTD_IMSG_LIST_REFS_INTERNAL:
740 9148c8a7 2023-01-02 thomas 			err = list_refs(&imsg);
741 3efd8e31 2022-10-23 thomas 			if (err)
742 3efd8e31 2022-10-23 thomas 				log_warnx("%s: ls-refs: %s", repo_read.title,
743 3efd8e31 2022-10-23 thomas 				    err->msg);
744 3efd8e31 2022-10-23 thomas 			break;
745 3efd8e31 2022-10-23 thomas 		case GOTD_IMSG_WANT:
746 9148c8a7 2023-01-02 thomas 			err = recv_want(&imsg);
747 3efd8e31 2022-10-23 thomas 			if (err)
748 3efd8e31 2022-10-23 thomas 				log_warnx("%s: want-line: %s", repo_read.title,
749 3efd8e31 2022-10-23 thomas 				    err->msg);
750 3efd8e31 2022-10-23 thomas 			break;
751 3efd8e31 2022-10-23 thomas 		case GOTD_IMSG_HAVE:
752 9148c8a7 2023-01-02 thomas 			err = recv_have(&imsg);
753 3efd8e31 2022-10-23 thomas 			if (err)
754 3efd8e31 2022-10-23 thomas 				log_warnx("%s: have-line: %s", repo_read.title,
755 3efd8e31 2022-10-23 thomas 				    err->msg);
756 3efd8e31 2022-10-23 thomas 			break;
757 3efd8e31 2022-10-23 thomas 		case GOTD_IMSG_SEND_PACKFILE:
758 9148c8a7 2023-01-02 thomas 			err = receive_delta_cache_fd(&imsg, iev);
759 3efd8e31 2022-10-23 thomas 			if (err)
760 3efd8e31 2022-10-23 thomas 				log_warnx("%s: receiving delta cache: %s",
761 3efd8e31 2022-10-23 thomas 				    repo_read.title, err->msg);
762 3efd8e31 2022-10-23 thomas 			break;
763 3efd8e31 2022-10-23 thomas 		case GOTD_IMSG_PACKFILE_PIPE:
764 9148c8a7 2023-01-02 thomas 			err = receive_pack_pipe(&imsg, iev);
765 3efd8e31 2022-10-23 thomas 			if (err) {
766 3efd8e31 2022-10-23 thomas 				log_warnx("%s: receiving pack pipe: %s",
767 3efd8e31 2022-10-23 thomas 				    repo_read.title, err->msg);
768 3efd8e31 2022-10-23 thomas 				break;
769 3efd8e31 2022-10-23 thomas 			}
770 9148c8a7 2023-01-02 thomas 			err = send_packfile(&imsg, iev);
771 3efd8e31 2022-10-23 thomas 			if (err)
772 3efd8e31 2022-10-23 thomas 				log_warnx("%s: sending packfile: %s",
773 3efd8e31 2022-10-23 thomas 				    repo_read.title, err->msg);
774 3efd8e31 2022-10-23 thomas 			break;
775 3efd8e31 2022-10-23 thomas 		case GOTD_IMSG_DISCONNECT:
776 3efd8e31 2022-10-23 thomas 			err = recv_disconnect(&imsg);
777 3efd8e31 2022-10-23 thomas 			if (err)
778 3efd8e31 2022-10-23 thomas 				log_warnx("%s: disconnect: %s",
779 3efd8e31 2022-10-23 thomas 				    repo_read.title, err->msg);
780 9148c8a7 2023-01-02 thomas 			shut = 1;
781 3efd8e31 2022-10-23 thomas 			break;
782 3efd8e31 2022-10-23 thomas 		default:
783 3efd8e31 2022-10-23 thomas 			log_debug("%s: unexpected imsg %d", repo_read.title,
784 3efd8e31 2022-10-23 thomas 			    imsg.hdr.type);
785 3efd8e31 2022-10-23 thomas 			break;
786 3efd8e31 2022-10-23 thomas 		}
787 3efd8e31 2022-10-23 thomas 
788 3efd8e31 2022-10-23 thomas 		imsg_free(&imsg);
789 3efd8e31 2022-10-23 thomas 	}
790 3efd8e31 2022-10-23 thomas 
791 3efd8e31 2022-10-23 thomas 	if (!shut && check_cancelled(NULL) == NULL) {
792 3efd8e31 2022-10-23 thomas 		if (err &&
793 3efd8e31 2022-10-23 thomas 		    gotd_imsg_send_error_event(iev, PROC_REPO_READ,
794 9148c8a7 2023-01-02 thomas 		        client->id, err) == -1) {
795 3efd8e31 2022-10-23 thomas 			log_warnx("could not send error to parent: %s",
796 3efd8e31 2022-10-23 thomas 			    err->msg);
797 3efd8e31 2022-10-23 thomas 		}
798 3efd8e31 2022-10-23 thomas 		gotd_imsg_event_add(iev);
799 3efd8e31 2022-10-23 thomas 	} else {
800 3efd8e31 2022-10-23 thomas 		/* This pipe is dead. Remove its event handler */
801 3efd8e31 2022-10-23 thomas 		event_del(&iev->ev);
802 3efd8e31 2022-10-23 thomas 		event_loopexit(NULL);
803 3efd8e31 2022-10-23 thomas 	}
804 3efd8e31 2022-10-23 thomas }
805 3efd8e31 2022-10-23 thomas 
806 3efd8e31 2022-10-23 thomas void
807 414e37cb 2022-12-30 thomas repo_read_main(const char *title, const char *repo_path,
808 414e37cb 2022-12-30 thomas     int *pack_fds, int *temp_fds)
809 3efd8e31 2022-10-23 thomas {
810 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
811 3efd8e31 2022-10-23 thomas 	struct gotd_imsgev iev;
812 3efd8e31 2022-10-23 thomas 
813 3efd8e31 2022-10-23 thomas 	repo_read.title = title;
814 3efd8e31 2022-10-23 thomas 	repo_read.pid = getpid();
815 3efd8e31 2022-10-23 thomas 	repo_read.pack_fds = pack_fds;
816 3efd8e31 2022-10-23 thomas 	repo_read.temp_fds = temp_fds;
817 3efd8e31 2022-10-23 thomas 
818 414e37cb 2022-12-30 thomas 	err = got_repo_open(&repo_read.repo, repo_path, NULL, pack_fds);
819 3efd8e31 2022-10-23 thomas 	if (err)
820 3efd8e31 2022-10-23 thomas 		goto done;
821 3efd8e31 2022-10-23 thomas 	if (!got_repo_is_bare(repo_read.repo)) {
822 3efd8e31 2022-10-23 thomas 		err = got_error_msg(GOT_ERR_NOT_GIT_REPO,
823 3efd8e31 2022-10-23 thomas 		    "bare git repository required");
824 3efd8e31 2022-10-23 thomas 		goto done;
825 3efd8e31 2022-10-23 thomas 	}
826 3efd8e31 2022-10-23 thomas 
827 3efd8e31 2022-10-23 thomas 	got_repo_temp_fds_set(repo_read.repo, temp_fds);
828 3efd8e31 2022-10-23 thomas 
829 3efd8e31 2022-10-23 thomas 	signal(SIGINT, catch_sigint);
830 3efd8e31 2022-10-23 thomas 	signal(SIGTERM, catch_sigterm);
831 3efd8e31 2022-10-23 thomas 	signal(SIGPIPE, SIG_IGN);
832 3efd8e31 2022-10-23 thomas 	signal(SIGHUP, SIG_IGN);
833 3efd8e31 2022-10-23 thomas 
834 bb3a6ce9 2022-11-17 thomas 	imsg_init(&iev.ibuf, GOTD_FILENO_MSG_PIPE);
835 3efd8e31 2022-10-23 thomas 	iev.handler = repo_read_dispatch;
836 3efd8e31 2022-10-23 thomas 	iev.events = EV_READ;
837 3efd8e31 2022-10-23 thomas 	iev.handler_arg = NULL;
838 3efd8e31 2022-10-23 thomas 	event_set(&iev.ev, iev.ibuf.fd, EV_READ, repo_read_dispatch, &iev);
839 85b37c72 2022-12-30 thomas 
840 85b37c72 2022-12-30 thomas 	if (gotd_imsg_compose_event(&iev, GOTD_IMSG_REPO_CHILD_READY,
841 85b37c72 2022-12-30 thomas 	    PROC_REPO_READ, -1, NULL, 0) == -1) {
842 85b37c72 2022-12-30 thomas 		err = got_error_from_errno("imsg compose REPO_CHILD_READY");
843 3efd8e31 2022-10-23 thomas 		goto done;
844 3efd8e31 2022-10-23 thomas 	}
845 3efd8e31 2022-10-23 thomas 
846 3efd8e31 2022-10-23 thomas 	event_dispatch();
847 3efd8e31 2022-10-23 thomas done:
848 3efd8e31 2022-10-23 thomas 	if (err)
849 3efd8e31 2022-10-23 thomas 		log_warnx("%s: %s", title, err->msg);
850 3efd8e31 2022-10-23 thomas 	repo_read_shutdown();
851 3efd8e31 2022-10-23 thomas }
852 3efd8e31 2022-10-23 thomas 
853 3efd8e31 2022-10-23 thomas void
854 3efd8e31 2022-10-23 thomas repo_read_shutdown(void)
855 3efd8e31 2022-10-23 thomas {
856 3efd8e31 2022-10-23 thomas 	log_debug("%s: shutting down", repo_read.title);
857 3efd8e31 2022-10-23 thomas 	if (repo_read.repo)
858 3efd8e31 2022-10-23 thomas 		got_repo_close(repo_read.repo);
859 3efd8e31 2022-10-23 thomas 	got_repo_pack_fds_close(repo_read.pack_fds);
860 3efd8e31 2022-10-23 thomas 	got_repo_temp_fds_close(repo_read.temp_fds);
861 3efd8e31 2022-10-23 thomas 	exit(0);
862 3efd8e31 2022-10-23 thomas }