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/stat.h>
  19 13b2bc37 2022-10-23 stsp #include <sys/tree.h>
  20 13b2bc37 2022-10-23 stsp #include <sys/types.h>
  21 13b2bc37 2022-10-23 stsp 
  22 13b2bc37 2022-10-23 stsp #include <event.h>
  23 13b2bc37 2022-10-23 stsp #include <errno.h>
  24 13b2bc37 2022-10-23 stsp #include <imsg.h>
  25 13b2bc37 2022-10-23 stsp #include <signal.h>
  26 13b2bc37 2022-10-23 stsp #include <siphash.h>
  27 13b2bc37 2022-10-23 stsp #include <stdio.h>
  28 13b2bc37 2022-10-23 stsp #include <stdlib.h>
  29 13b2bc37 2022-10-23 stsp #include <string.h>
  30 13b2bc37 2022-10-23 stsp #include <limits.h>
  31 13b2bc37 2022-10-23 stsp #include <poll.h>
  32 13b2bc37 2022-10-23 stsp #include <sha1.h>
  33 13b2bc37 2022-10-23 stsp #include <unistd.h>
  34 13b2bc37 2022-10-23 stsp #include <zlib.h>
  35 13b2bc37 2022-10-23 stsp 
  36 13b2bc37 2022-10-23 stsp #include "buf.h"
  37 13b2bc37 2022-10-23 stsp 
  38 13b2bc37 2022-10-23 stsp #include "got_error.h"
  39 13b2bc37 2022-10-23 stsp #include "got_repository.h"
  40 13b2bc37 2022-10-23 stsp #include "got_object.h"
  41 13b2bc37 2022-10-23 stsp #include "got_reference.h"
  42 13b2bc37 2022-10-23 stsp #include "got_path.h"
  43 13b2bc37 2022-10-23 stsp 
  44 13b2bc37 2022-10-23 stsp #include "got_lib_delta.h"
  45 13b2bc37 2022-10-23 stsp #include "got_lib_delta_cache.h"
  46 13b2bc37 2022-10-23 stsp #include "got_lib_object.h"
  47 13b2bc37 2022-10-23 stsp #include "got_lib_object_cache.h"
  48 13b2bc37 2022-10-23 stsp #include "got_lib_ratelimit.h"
  49 13b2bc37 2022-10-23 stsp #include "got_lib_pack.h"
  50 13b2bc37 2022-10-23 stsp #include "got_lib_pack_index.h"
  51 13b2bc37 2022-10-23 stsp #include "got_lib_repository.h"
  52 13b2bc37 2022-10-23 stsp #include "got_lib_poll.h"
  53 13b2bc37 2022-10-23 stsp 
  54 13b2bc37 2022-10-23 stsp #include "got_lib_sha1.h" /* XXX temp include for debugging */
  55 13b2bc37 2022-10-23 stsp 
  56 13b2bc37 2022-10-23 stsp #include "log.h"
  57 13b2bc37 2022-10-23 stsp #include "gotd.h"
  58 13b2bc37 2022-10-23 stsp #include "repo_write.h"
  59 13b2bc37 2022-10-23 stsp 
  60 13b2bc37 2022-10-23 stsp #ifndef nitems
  61 13b2bc37 2022-10-23 stsp #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
  62 13b2bc37 2022-10-23 stsp #endif
  63 13b2bc37 2022-10-23 stsp 
  64 13b2bc37 2022-10-23 stsp static struct repo_write {
  65 13b2bc37 2022-10-23 stsp 	pid_t pid;
  66 13b2bc37 2022-10-23 stsp 	const char *title;
  67 13b2bc37 2022-10-23 stsp 	struct got_repository *repo;
  68 13b2bc37 2022-10-23 stsp 	int *pack_fds;
  69 13b2bc37 2022-10-23 stsp 	int *temp_fds;
  70 13b2bc37 2022-10-23 stsp } repo_write;
  71 13b2bc37 2022-10-23 stsp 
  72 13b2bc37 2022-10-23 stsp struct gotd_ref_update {
  73 13b2bc37 2022-10-23 stsp 	STAILQ_ENTRY(gotd_ref_update) entry;
  74 13b2bc37 2022-10-23 stsp 	struct got_reference *ref;
  75 13b2bc37 2022-10-23 stsp 	int ref_is_new;
  76 13b2bc37 2022-10-23 stsp 	struct got_object_id old_id;
  77 13b2bc37 2022-10-23 stsp 	struct got_object_id new_id;
  78 13b2bc37 2022-10-23 stsp };
  79 13b2bc37 2022-10-23 stsp STAILQ_HEAD(gotd_ref_updates, gotd_ref_update);
  80 13b2bc37 2022-10-23 stsp 
  81 13b2bc37 2022-10-23 stsp struct repo_write_client {
  82 13b2bc37 2022-10-23 stsp 	STAILQ_ENTRY(repo_write_client)	 entry;
  83 13b2bc37 2022-10-23 stsp 	uint32_t			 id;
  84 13b2bc37 2022-10-23 stsp 	int				 fd;
  85 7fec5f4a 2022-10-28 stsp 	int				 pack_pipe;
  86 13b2bc37 2022-10-23 stsp 	struct got_pack			 pack;
  87 13b2bc37 2022-10-23 stsp 	uint8_t				 pack_sha1[SHA1_DIGEST_LENGTH];
  88 13b2bc37 2022-10-23 stsp 	int				 packidx_fd;
  89 13b2bc37 2022-10-23 stsp 	struct gotd_ref_updates		 ref_updates;
  90 13b2bc37 2022-10-23 stsp 	int				 nref_updates;
  91 13b2bc37 2022-10-23 stsp };
  92 13b2bc37 2022-10-23 stsp STAILQ_HEAD(repo_write_clients, repo_write_client);
  93 13b2bc37 2022-10-23 stsp 
  94 13b2bc37 2022-10-23 stsp static struct repo_write_clients repo_write_clients[GOTD_CLIENT_TABLE_SIZE];
  95 13b2bc37 2022-10-23 stsp static SIPHASH_KEY clients_hash_key;
  96 13b2bc37 2022-10-23 stsp 
  97 13b2bc37 2022-10-23 stsp static uint64_t
  98 13b2bc37 2022-10-23 stsp client_hash(uint32_t client_id)
  99 13b2bc37 2022-10-23 stsp {
 100 13b2bc37 2022-10-23 stsp 	return SipHash24(&clients_hash_key, &client_id, sizeof(client_id));
 101 13b2bc37 2022-10-23 stsp }
 102 13b2bc37 2022-10-23 stsp 
 103 13b2bc37 2022-10-23 stsp static void
 104 13b2bc37 2022-10-23 stsp add_client(struct repo_write_client *client, uint32_t client_id, int fd)
 105 13b2bc37 2022-10-23 stsp {
 106 13b2bc37 2022-10-23 stsp 	uint64_t slot;
 107 13b2bc37 2022-10-23 stsp 
 108 13b2bc37 2022-10-23 stsp 	client->id = client_id;
 109 13b2bc37 2022-10-23 stsp 	client->fd = fd;
 110 7fec5f4a 2022-10-28 stsp 	client->pack_pipe = -1;
 111 13b2bc37 2022-10-23 stsp 	client->packidx_fd = -1;
 112 13b2bc37 2022-10-23 stsp 	STAILQ_INIT(&client->ref_updates);
 113 13b2bc37 2022-10-23 stsp 	client->nref_updates = 0;
 114 13b2bc37 2022-10-23 stsp 	slot = client_hash(client->id) % nitems(repo_write_clients);
 115 13b2bc37 2022-10-23 stsp 	STAILQ_INSERT_HEAD(&repo_write_clients[slot], client, entry);
 116 13b2bc37 2022-10-23 stsp }
 117 13b2bc37 2022-10-23 stsp 
 118 13b2bc37 2022-10-23 stsp static struct repo_write_client *
 119 13b2bc37 2022-10-23 stsp find_client(uint32_t client_id)
 120 13b2bc37 2022-10-23 stsp {
 121 13b2bc37 2022-10-23 stsp 	uint64_t slot;
 122 13b2bc37 2022-10-23 stsp 	struct repo_write_client *c;
 123 13b2bc37 2022-10-23 stsp 
 124 13b2bc37 2022-10-23 stsp 	slot = client_hash(client_id) % nitems(repo_write_clients);
 125 13b2bc37 2022-10-23 stsp 	STAILQ_FOREACH(c, &repo_write_clients[slot], entry) {
 126 13b2bc37 2022-10-23 stsp 		if (c->id == client_id)
 127 13b2bc37 2022-10-23 stsp 			return c;
 128 13b2bc37 2022-10-23 stsp 	}
 129 13b2bc37 2022-10-23 stsp 
 130 13b2bc37 2022-10-23 stsp 	return NULL;
 131 13b2bc37 2022-10-23 stsp }
 132 13b2bc37 2022-10-23 stsp 
 133 13b2bc37 2022-10-23 stsp static volatile sig_atomic_t sigint_received;
 134 13b2bc37 2022-10-23 stsp static volatile sig_atomic_t sigterm_received;
 135 13b2bc37 2022-10-23 stsp 
 136 13b2bc37 2022-10-23 stsp static void
 137 13b2bc37 2022-10-23 stsp catch_sigint(int signo)
 138 13b2bc37 2022-10-23 stsp {
 139 13b2bc37 2022-10-23 stsp 	sigint_received = 1;
 140 13b2bc37 2022-10-23 stsp }
 141 13b2bc37 2022-10-23 stsp 
 142 13b2bc37 2022-10-23 stsp static void
 143 13b2bc37 2022-10-23 stsp catch_sigterm(int signo)
 144 13b2bc37 2022-10-23 stsp {
 145 13b2bc37 2022-10-23 stsp 	sigterm_received = 1;
 146 13b2bc37 2022-10-23 stsp }
 147 13b2bc37 2022-10-23 stsp 
 148 13b2bc37 2022-10-23 stsp static const struct got_error *
 149 13b2bc37 2022-10-23 stsp check_cancelled(void *arg)
 150 13b2bc37 2022-10-23 stsp {
 151 13b2bc37 2022-10-23 stsp 	if (sigint_received || sigterm_received)
 152 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_CANCELLED);
 153 13b2bc37 2022-10-23 stsp 
 154 13b2bc37 2022-10-23 stsp 	return NULL;
 155 13b2bc37 2022-10-23 stsp }
 156 13b2bc37 2022-10-23 stsp 
 157 13b2bc37 2022-10-23 stsp static const struct got_error *
 158 13b2bc37 2022-10-23 stsp send_peeled_tag_ref(struct got_reference *ref, struct got_object *obj,
 159 13b2bc37 2022-10-23 stsp     struct imsgbuf *ibuf)
 160 13b2bc37 2022-10-23 stsp {
 161 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
 162 13b2bc37 2022-10-23 stsp 	struct got_tag_object *tag;
 163 13b2bc37 2022-10-23 stsp 	size_t namelen, len;
 164 13b2bc37 2022-10-23 stsp 	char *peeled_refname = NULL;
 165 13b2bc37 2022-10-23 stsp 	struct got_object_id *id;
 166 13b2bc37 2022-10-23 stsp 	struct ibuf *wbuf;
 167 13b2bc37 2022-10-23 stsp 
 168 13b2bc37 2022-10-23 stsp 	err = got_object_tag_open(&tag, repo_write.repo, obj);
 169 13b2bc37 2022-10-23 stsp 	if (err)
 170 13b2bc37 2022-10-23 stsp 		return err;
 171 13b2bc37 2022-10-23 stsp 
 172 13b2bc37 2022-10-23 stsp 	if (asprintf(&peeled_refname, "%s^{}", got_ref_get_name(ref)) == -1) {
 173 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("asprintf");
 174 13b2bc37 2022-10-23 stsp 		goto done;
 175 13b2bc37 2022-10-23 stsp 	}
 176 13b2bc37 2022-10-23 stsp 
 177 13b2bc37 2022-10-23 stsp 	id = got_object_tag_get_object_id(tag);
 178 13b2bc37 2022-10-23 stsp 	namelen = strlen(peeled_refname);
 179 13b2bc37 2022-10-23 stsp 
 180 13b2bc37 2022-10-23 stsp 	len = sizeof(struct gotd_imsg_ref) + namelen;
 181 13b2bc37 2022-10-23 stsp 	if (len > MAX_IMSGSIZE - IMSG_HEADER_SIZE) {
 182 13b2bc37 2022-10-23 stsp 		err = got_error(GOT_ERR_NO_SPACE);
 183 13b2bc37 2022-10-23 stsp 		goto done;
 184 13b2bc37 2022-10-23 stsp 	}
 185 13b2bc37 2022-10-23 stsp 
 186 13b2bc37 2022-10-23 stsp 	wbuf = imsg_create(ibuf, GOTD_IMSG_REF, PROC_REPO_WRITE,
 187 13b2bc37 2022-10-23 stsp 	    repo_write.pid, len);
 188 13b2bc37 2022-10-23 stsp 	if (wbuf == NULL) {
 189 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_create REF");
 190 13b2bc37 2022-10-23 stsp 		goto done;
 191 13b2bc37 2022-10-23 stsp 	}
 192 13b2bc37 2022-10-23 stsp 
 193 13b2bc37 2022-10-23 stsp 	/* Keep in sync with struct gotd_imsg_ref definition. */
 194 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, id->sha1, SHA1_DIGEST_LENGTH) == -1) {
 195 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add REF");
 196 13b2bc37 2022-10-23 stsp 		goto done;
 197 13b2bc37 2022-10-23 stsp 	}
 198 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, &namelen, sizeof(namelen)) == -1) {
 199 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add REF");
 200 13b2bc37 2022-10-23 stsp 		goto done;
 201 13b2bc37 2022-10-23 stsp 	}
 202 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, peeled_refname, namelen) == -1) {
 203 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add REF");
 204 13b2bc37 2022-10-23 stsp 		goto done;
 205 13b2bc37 2022-10-23 stsp 	}
 206 13b2bc37 2022-10-23 stsp 
 207 13b2bc37 2022-10-23 stsp 	wbuf->fd = -1;
 208 13b2bc37 2022-10-23 stsp 	imsg_close(ibuf, wbuf);
 209 13b2bc37 2022-10-23 stsp done:
 210 13b2bc37 2022-10-23 stsp 	got_object_tag_close(tag);
 211 13b2bc37 2022-10-23 stsp 	return err;
 212 13b2bc37 2022-10-23 stsp }
 213 13b2bc37 2022-10-23 stsp 
 214 13b2bc37 2022-10-23 stsp static const struct got_error *
 215 13b2bc37 2022-10-23 stsp send_ref(struct got_reference *ref, struct imsgbuf *ibuf)
 216 13b2bc37 2022-10-23 stsp {
 217 13b2bc37 2022-10-23 stsp 	const struct got_error *err;
 218 13b2bc37 2022-10-23 stsp 	const char *refname = got_ref_get_name(ref);
 219 13b2bc37 2022-10-23 stsp 	size_t namelen;
 220 13b2bc37 2022-10-23 stsp 	struct got_object_id *id = NULL;
 221 13b2bc37 2022-10-23 stsp 	struct got_object *obj = NULL;
 222 13b2bc37 2022-10-23 stsp 	size_t len;
 223 13b2bc37 2022-10-23 stsp 	struct ibuf *wbuf;
 224 13b2bc37 2022-10-23 stsp 
 225 13b2bc37 2022-10-23 stsp 	namelen = strlen(refname);
 226 13b2bc37 2022-10-23 stsp 
 227 13b2bc37 2022-10-23 stsp 	len = sizeof(struct gotd_imsg_ref) + namelen;
 228 13b2bc37 2022-10-23 stsp 	if (len > MAX_IMSGSIZE - IMSG_HEADER_SIZE)
 229 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_NO_SPACE);
 230 13b2bc37 2022-10-23 stsp 
 231 13b2bc37 2022-10-23 stsp 	err = got_ref_resolve(&id, repo_write.repo, ref);
 232 13b2bc37 2022-10-23 stsp 	if (err)
 233 13b2bc37 2022-10-23 stsp 		return err;
 234 13b2bc37 2022-10-23 stsp 
 235 13b2bc37 2022-10-23 stsp 	wbuf = imsg_create(ibuf, GOTD_IMSG_REF, PROC_REPO_WRITE,
 236 13b2bc37 2022-10-23 stsp 	    repo_write.pid, len);
 237 13b2bc37 2022-10-23 stsp 	if (wbuf == NULL) {
 238 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_create REF");
 239 13b2bc37 2022-10-23 stsp 		goto done;
 240 13b2bc37 2022-10-23 stsp 	}
 241 13b2bc37 2022-10-23 stsp 
 242 13b2bc37 2022-10-23 stsp 	/* Keep in sync with struct gotd_imsg_ref definition. */
 243 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, id->sha1, SHA1_DIGEST_LENGTH) == -1)
 244 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF");
 245 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, &namelen, sizeof(namelen)) == -1)
 246 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF");
 247 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, refname, namelen) == -1)
 248 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF");
 249 13b2bc37 2022-10-23 stsp 
 250 13b2bc37 2022-10-23 stsp 	wbuf->fd = -1;
 251 13b2bc37 2022-10-23 stsp 	imsg_close(ibuf, wbuf);
 252 13b2bc37 2022-10-23 stsp 
 253 13b2bc37 2022-10-23 stsp 	err = got_object_open(&obj, repo_write.repo, id);
 254 13b2bc37 2022-10-23 stsp 	if (err)
 255 13b2bc37 2022-10-23 stsp 		goto done;
 256 13b2bc37 2022-10-23 stsp 	if (obj->type == GOT_OBJ_TYPE_TAG)
 257 13b2bc37 2022-10-23 stsp 		err = send_peeled_tag_ref(ref, obj, ibuf);
 258 13b2bc37 2022-10-23 stsp done:
 259 13b2bc37 2022-10-23 stsp 	if (obj)
 260 13b2bc37 2022-10-23 stsp 		got_object_close(obj);
 261 13b2bc37 2022-10-23 stsp 	free(id);
 262 13b2bc37 2022-10-23 stsp 	return err;
 263 13b2bc37 2022-10-23 stsp }
 264 13b2bc37 2022-10-23 stsp 
 265 13b2bc37 2022-10-23 stsp static const struct got_error *
 266 13b2bc37 2022-10-23 stsp list_refs(struct repo_write_client **client, struct imsg *imsg)
 267 13b2bc37 2022-10-23 stsp {
 268 13b2bc37 2022-10-23 stsp 	const struct got_error *err;
 269 13b2bc37 2022-10-23 stsp 	struct got_reflist_head refs;
 270 13b2bc37 2022-10-23 stsp 	struct got_reflist_entry *re;
 271 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_list_refs_internal ireq;
 272 13b2bc37 2022-10-23 stsp 	size_t datalen;
 273 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_reflist irefs;
 274 13b2bc37 2022-10-23 stsp 	struct imsgbuf ibuf;
 275 13b2bc37 2022-10-23 stsp 	int client_fd = imsg->fd;
 276 13b2bc37 2022-10-23 stsp 
 277 13b2bc37 2022-10-23 stsp 	TAILQ_INIT(&refs);
 278 13b2bc37 2022-10-23 stsp 
 279 13b2bc37 2022-10-23 stsp 	if (client_fd == -1)
 280 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
 281 13b2bc37 2022-10-23 stsp 
 282 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 283 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq))
 284 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 285 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, sizeof(ireq));
 286 13b2bc37 2022-10-23 stsp 
 287 13b2bc37 2022-10-23 stsp 	*client = find_client(ireq.client_id);
 288 13b2bc37 2022-10-23 stsp 	if (*client)
 289 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_CLIENT_ID, "duplicate client ID");
 290 13b2bc37 2022-10-23 stsp 
 291 13b2bc37 2022-10-23 stsp 	*client = calloc(1, sizeof(**client));
 292 13b2bc37 2022-10-23 stsp 	if (*client == NULL)
 293 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("calloc");
 294 13b2bc37 2022-10-23 stsp 	add_client(*client, ireq.client_id, client_fd);
 295 13b2bc37 2022-10-23 stsp 
 296 13b2bc37 2022-10-23 stsp 	imsg_init(&ibuf, client_fd);
 297 13b2bc37 2022-10-23 stsp 
 298 13b2bc37 2022-10-23 stsp 	err = got_ref_list(&refs, repo_write.repo, "",
 299 13b2bc37 2022-10-23 stsp 	    got_ref_cmp_by_name, NULL);
 300 13b2bc37 2022-10-23 stsp 	if (err)
 301 13b2bc37 2022-10-23 stsp 		return err;
 302 13b2bc37 2022-10-23 stsp 
 303 13b2bc37 2022-10-23 stsp 	memset(&irefs, 0, sizeof(irefs));
 304 13b2bc37 2022-10-23 stsp 	TAILQ_FOREACH(re, &refs, entry) {
 305 13b2bc37 2022-10-23 stsp 		struct got_object_id *id;
 306 13b2bc37 2022-10-23 stsp 		int obj_type;
 307 13b2bc37 2022-10-23 stsp 
 308 13b2bc37 2022-10-23 stsp 		if (got_ref_is_symbolic(re->ref))
 309 13b2bc37 2022-10-23 stsp 			continue;
 310 13b2bc37 2022-10-23 stsp 
 311 13b2bc37 2022-10-23 stsp 		irefs.nrefs++;
 312 13b2bc37 2022-10-23 stsp 
 313 13b2bc37 2022-10-23 stsp 		/* Account for a peeled tag refs. */
 314 13b2bc37 2022-10-23 stsp 		err = got_ref_resolve(&id, repo_write.repo, re->ref);
 315 13b2bc37 2022-10-23 stsp 		if (err)
 316 13b2bc37 2022-10-23 stsp 			goto done;
 317 13b2bc37 2022-10-23 stsp 		err = got_object_get_type(&obj_type, repo_write.repo, id);	
 318 13b2bc37 2022-10-23 stsp 		free(id);
 319 13b2bc37 2022-10-23 stsp 		if (err)
 320 13b2bc37 2022-10-23 stsp 			goto done;
 321 13b2bc37 2022-10-23 stsp 		if (obj_type == GOT_OBJ_TYPE_TAG)
 322 13b2bc37 2022-10-23 stsp 			irefs.nrefs++;
 323 13b2bc37 2022-10-23 stsp 	}
 324 13b2bc37 2022-10-23 stsp 
 325 13b2bc37 2022-10-23 stsp 	if (imsg_compose(&ibuf, GOTD_IMSG_REFLIST, PROC_REPO_WRITE,
 326 13b2bc37 2022-10-23 stsp 	    repo_write.pid, -1, &irefs, sizeof(irefs)) == -1) {
 327 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_compose REFLIST");
 328 13b2bc37 2022-10-23 stsp 		goto done;
 329 13b2bc37 2022-10-23 stsp 	}
 330 13b2bc37 2022-10-23 stsp 
 331 13b2bc37 2022-10-23 stsp 	TAILQ_FOREACH(re, &refs, entry) {
 332 13b2bc37 2022-10-23 stsp 		if (got_ref_is_symbolic(re->ref))
 333 13b2bc37 2022-10-23 stsp 			continue;
 334 13b2bc37 2022-10-23 stsp 		err = send_ref(re->ref, &ibuf);
 335 13b2bc37 2022-10-23 stsp 		if (err)
 336 13b2bc37 2022-10-23 stsp 			goto done;
 337 13b2bc37 2022-10-23 stsp 	}
 338 13b2bc37 2022-10-23 stsp 
 339 13b2bc37 2022-10-23 stsp 	err = gotd_imsg_flush(&ibuf);
 340 13b2bc37 2022-10-23 stsp done:
 341 13b2bc37 2022-10-23 stsp 	got_ref_list_free(&refs);
 342 13b2bc37 2022-10-23 stsp 	imsg_clear(&ibuf);
 343 13b2bc37 2022-10-23 stsp 	return err;
 344 13b2bc37 2022-10-23 stsp }
 345 13b2bc37 2022-10-23 stsp 
 346 13b2bc37 2022-10-23 stsp static const struct got_error *
 347 13b2bc37 2022-10-23 stsp protect_ref_namespace(struct got_reference *ref, const char *namespace)
 348 13b2bc37 2022-10-23 stsp {
 349 13b2bc37 2022-10-23 stsp 	size_t len = strlen(namespace);
 350 13b2bc37 2022-10-23 stsp 
 351 13b2bc37 2022-10-23 stsp 	if (len < 5 || strncmp("refs/", namespace, 5) != 0 ||
 352 13b2bc37 2022-10-23 stsp 	    namespace[len -1] != '/') {
 353 13b2bc37 2022-10-23 stsp 		return got_error_fmt(GOT_ERR_BAD_REF_NAME,
 354 13b2bc37 2022-10-23 stsp 		    "reference namespace '%s'", namespace);
 355 13b2bc37 2022-10-23 stsp 	}
 356 13b2bc37 2022-10-23 stsp 
 357 13b2bc37 2022-10-23 stsp 	if (strncmp(namespace, got_ref_get_name(ref), len) == 0)
 358 13b2bc37 2022-10-23 stsp 		return got_error_fmt(GOT_ERR_REFS_PROTECTED, "%s", namespace);
 359 13b2bc37 2022-10-23 stsp 
 360 13b2bc37 2022-10-23 stsp 	return NULL;
 361 13b2bc37 2022-10-23 stsp }
 362 13b2bc37 2022-10-23 stsp 
 363 13b2bc37 2022-10-23 stsp static const struct got_error *
 364 13b2bc37 2022-10-23 stsp recv_ref_update(struct repo_write_client **client, struct imsg *imsg)
 365 13b2bc37 2022-10-23 stsp {
 366 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
 367 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_update iref;
 368 13b2bc37 2022-10-23 stsp 	size_t datalen;
 369 13b2bc37 2022-10-23 stsp 	char *refname = NULL;
 370 13b2bc37 2022-10-23 stsp 	struct got_reference *ref = NULL;
 371 13b2bc37 2022-10-23 stsp 	struct got_object_id *id = NULL;
 372 13b2bc37 2022-10-23 stsp 	struct imsgbuf ibuf;
 373 13b2bc37 2022-10-23 stsp 	struct gotd_ref_update *ref_update = NULL;
 374 13b2bc37 2022-10-23 stsp 
 375 13b2bc37 2022-10-23 stsp 	log_debug("ref-update received");
 376 13b2bc37 2022-10-23 stsp 
 377 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 378 13b2bc37 2022-10-23 stsp 	if (datalen < sizeof(iref))
 379 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 380 13b2bc37 2022-10-23 stsp 	memcpy(&iref, imsg->data, sizeof(iref));
 381 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(iref) + iref.name_len)
 382 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 383 13b2bc37 2022-10-23 stsp 
 384 13b2bc37 2022-10-23 stsp 	*client = find_client(iref.client_id);
 385 13b2bc37 2022-10-23 stsp 	if (*client == NULL)
 386 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_CLIENT_ID);
 387 13b2bc37 2022-10-23 stsp 
 388 13b2bc37 2022-10-23 stsp 	imsg_init(&ibuf, (*client)->fd);
 389 13b2bc37 2022-10-23 stsp 
 390 13b2bc37 2022-10-23 stsp 	refname = malloc(iref.name_len + 1);
 391 13b2bc37 2022-10-23 stsp 	if (refname == NULL)
 392 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("malloc");
 393 13b2bc37 2022-10-23 stsp 	memcpy(refname, imsg->data + sizeof(iref), iref.name_len);
 394 13b2bc37 2022-10-23 stsp 	refname[iref.name_len] = '\0';
 395 13b2bc37 2022-10-23 stsp 
 396 13b2bc37 2022-10-23 stsp 	ref_update = calloc(1, sizeof(*ref_update));
 397 13b2bc37 2022-10-23 stsp 	if (ref_update == NULL) {
 398 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("malloc");
 399 13b2bc37 2022-10-23 stsp 		goto done;
 400 13b2bc37 2022-10-23 stsp 	}
 401 13b2bc37 2022-10-23 stsp 
 402 13b2bc37 2022-10-23 stsp 	memcpy(ref_update->old_id.sha1, iref.old_id, SHA1_DIGEST_LENGTH);
 403 13b2bc37 2022-10-23 stsp 	memcpy(ref_update->new_id.sha1, iref.new_id, SHA1_DIGEST_LENGTH);
 404 13b2bc37 2022-10-23 stsp 
 405 13b2bc37 2022-10-23 stsp 	err = got_ref_open(&ref, repo_write.repo, refname, 0);
 406 13b2bc37 2022-10-23 stsp 	if (err) {
 407 13b2bc37 2022-10-23 stsp 		if (err->code != GOT_ERR_NOT_REF)
 408 13b2bc37 2022-10-23 stsp 			goto done;
 409 13b2bc37 2022-10-23 stsp 		err = got_ref_alloc(&ref, refname, &ref_update->new_id);
 410 13b2bc37 2022-10-23 stsp 		if (err)
 411 13b2bc37 2022-10-23 stsp 			goto done;
 412 13b2bc37 2022-10-23 stsp 		ref_update->ref_is_new = 1;
 413 13b2bc37 2022-10-23 stsp 	}
 414 13b2bc37 2022-10-23 stsp 	if (got_ref_is_symbolic(ref)) {
 415 13b2bc37 2022-10-23 stsp 		err = got_error_fmt(GOT_ERR_BAD_REF_TYPE,
 416 13b2bc37 2022-10-23 stsp 		    "'%s' is a symbolic reference and cannot "
 417 13b2bc37 2022-10-23 stsp 		    "be updated", got_ref_get_name(ref));
 418 13b2bc37 2022-10-23 stsp 		goto done;
 419 13b2bc37 2022-10-23 stsp 	}
 420 13b2bc37 2022-10-23 stsp 	if (strncmp("refs/", got_ref_get_name(ref), 5) != 0) {
 421 13b2bc37 2022-10-23 stsp 		err = got_error_fmt(GOT_ERR_BAD_REF_NAME,
 422 13b2bc37 2022-10-23 stsp 		    "%s: does not begin with 'refs/'",
 423 13b2bc37 2022-10-23 stsp 		    got_ref_get_name(ref));
 424 13b2bc37 2022-10-23 stsp 		goto done;
 425 13b2bc37 2022-10-23 stsp 	}
 426 13b2bc37 2022-10-23 stsp 
 427 13b2bc37 2022-10-23 stsp 	err = protect_ref_namespace(ref, "refs/got/");
 428 13b2bc37 2022-10-23 stsp 	if (err)
 429 13b2bc37 2022-10-23 stsp 		goto done;
 430 13b2bc37 2022-10-23 stsp 	err = protect_ref_namespace(ref, "refs/remotes/");
 431 13b2bc37 2022-10-23 stsp 	if (err)
 432 13b2bc37 2022-10-23 stsp 		goto done;
 433 13b2bc37 2022-10-23 stsp 
 434 13b2bc37 2022-10-23 stsp 	if (!ref_update->ref_is_new) {
 435 13b2bc37 2022-10-23 stsp 		/*
 436 13b2bc37 2022-10-23 stsp 		 * Ensure the client's idea of this update is still valid.
 437 13b2bc37 2022-10-23 stsp 		 * At this point we can only return an error, to prevent
 438 13b2bc37 2022-10-23 stsp 		 * the client from uploading a pack file which will likely
 439 13b2bc37 2022-10-23 stsp 		 * have to be discarded.
 440 13b2bc37 2022-10-23 stsp 		 */
 441 13b2bc37 2022-10-23 stsp 		err = got_ref_resolve(&id, repo_write.repo, ref);
 442 13b2bc37 2022-10-23 stsp 		if (err)
 443 13b2bc37 2022-10-23 stsp 			goto done;
 444 13b2bc37 2022-10-23 stsp 
 445 13b2bc37 2022-10-23 stsp 		if (got_object_id_cmp(id, &ref_update->old_id) != 0) {
 446 13b2bc37 2022-10-23 stsp 			err = got_error_fmt(GOT_ERR_REF_BUSY,
 447 13b2bc37 2022-10-23 stsp 			    "%s has been modified by someone else "
 448 13b2bc37 2022-10-23 stsp 			    "while transaction was in progress",
 449 13b2bc37 2022-10-23 stsp 			    got_ref_get_name(ref));
 450 13b2bc37 2022-10-23 stsp 			goto done;
 451 13b2bc37 2022-10-23 stsp 		}
 452 13b2bc37 2022-10-23 stsp 	}
 453 13b2bc37 2022-10-23 stsp 
 454 13b2bc37 2022-10-23 stsp 	gotd_imsg_send_ack(&ref_update->new_id, &ibuf, PROC_REPO_WRITE,
 455 13b2bc37 2022-10-23 stsp 	    repo_write.pid);
 456 13b2bc37 2022-10-23 stsp 
 457 13b2bc37 2022-10-23 stsp 	ref_update->ref = ref;
 458 13b2bc37 2022-10-23 stsp 	STAILQ_INSERT_HEAD(&(*client)->ref_updates, ref_update, entry);
 459 13b2bc37 2022-10-23 stsp 	(*client)->nref_updates++;
 460 13b2bc37 2022-10-23 stsp 	ref = NULL;
 461 13b2bc37 2022-10-23 stsp 	ref_update = NULL;
 462 13b2bc37 2022-10-23 stsp done:
 463 13b2bc37 2022-10-23 stsp 	if (ref)
 464 13b2bc37 2022-10-23 stsp 		got_ref_close(ref);
 465 13b2bc37 2022-10-23 stsp 	free(ref_update);
 466 13b2bc37 2022-10-23 stsp 	free(refname);
 467 13b2bc37 2022-10-23 stsp 	free(id);
 468 13b2bc37 2022-10-23 stsp 	return err;
 469 13b2bc37 2022-10-23 stsp }
 470 13b2bc37 2022-10-23 stsp 
 471 13b2bc37 2022-10-23 stsp static const struct got_error *
 472 13b2bc37 2022-10-23 stsp pack_index_progress(void *arg, uint32_t nobj_total, uint32_t nobj_indexed,
 473 13b2bc37 2022-10-23 stsp     uint32_t nobj_loose, uint32_t nobj_resolved)
 474 13b2bc37 2022-10-23 stsp {
 475 13b2bc37 2022-10-23 stsp 	int p_indexed = 0, p_resolved = 0;
 476 13b2bc37 2022-10-23 stsp 	int nobj_delta = nobj_total - nobj_loose;
 477 13b2bc37 2022-10-23 stsp 
 478 13b2bc37 2022-10-23 stsp 	if (nobj_total > 0)
 479 13b2bc37 2022-10-23 stsp 		p_indexed = (nobj_indexed * 100) / nobj_total;
 480 13b2bc37 2022-10-23 stsp 
 481 13b2bc37 2022-10-23 stsp 	if (nobj_delta > 0)
 482 13b2bc37 2022-10-23 stsp 		p_resolved = (nobj_resolved * 100) / nobj_delta;
 483 13b2bc37 2022-10-23 stsp 
 484 13b2bc37 2022-10-23 stsp 	if (p_resolved > 0) {
 485 13b2bc37 2022-10-23 stsp 		log_debug("indexing %d objects %d%%; resolving %d deltas %d%%",
 486 13b2bc37 2022-10-23 stsp 		    nobj_total, p_indexed, nobj_delta, p_resolved);
 487 13b2bc37 2022-10-23 stsp 	} else
 488 13b2bc37 2022-10-23 stsp 		log_debug("indexing %d objects %d%%", nobj_total, p_indexed);
 489 13b2bc37 2022-10-23 stsp 
 490 13b2bc37 2022-10-23 stsp 	return NULL;
 491 13b2bc37 2022-10-23 stsp }
 492 13b2bc37 2022-10-23 stsp 
 493 13b2bc37 2022-10-23 stsp static const struct got_error *
 494 13b2bc37 2022-10-23 stsp read_more_pack_stream(int infd, BUF *buf, size_t minsize)
 495 13b2bc37 2022-10-23 stsp {
 496 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
 497 13b2bc37 2022-10-23 stsp 	uint8_t readahead[65536];
 498 13b2bc37 2022-10-23 stsp 	size_t have, newlen;
 499 13b2bc37 2022-10-23 stsp 
 500 13b2bc37 2022-10-23 stsp 	err = got_poll_read_full(infd, &have,
 501 13b2bc37 2022-10-23 stsp 	    readahead, sizeof(readahead), minsize);
 502 13b2bc37 2022-10-23 stsp 	if (err)
 503 13b2bc37 2022-10-23 stsp 		return err;
 504 13b2bc37 2022-10-23 stsp 
 505 13b2bc37 2022-10-23 stsp 	err = buf_append(&newlen, buf, readahead, have);
 506 13b2bc37 2022-10-23 stsp 	if (err)
 507 13b2bc37 2022-10-23 stsp 		return err;
 508 13b2bc37 2022-10-23 stsp 	return NULL;	
 509 13b2bc37 2022-10-23 stsp }
 510 13b2bc37 2022-10-23 stsp 
 511 13b2bc37 2022-10-23 stsp static const struct got_error *
 512 13b2bc37 2022-10-23 stsp copy_object_type_and_size(uint8_t *type, uint64_t *size, int infd, int outfd,
 513 13b2bc37 2022-10-23 stsp     off_t *outsize, BUF *buf, size_t *buf_pos, SHA1_CTX *ctx)
 514 13b2bc37 2022-10-23 stsp {
 515 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
 516 13b2bc37 2022-10-23 stsp 	uint8_t t = 0;
 517 13b2bc37 2022-10-23 stsp 	uint64_t s = 0;
 518 13b2bc37 2022-10-23 stsp 	uint8_t sizebuf[8];
 519 13b2bc37 2022-10-23 stsp 	size_t i = 0;
 520 13b2bc37 2022-10-23 stsp 	off_t obj_offset = *outsize;
 521 13b2bc37 2022-10-23 stsp 
 522 13b2bc37 2022-10-23 stsp 	do {
 523 13b2bc37 2022-10-23 stsp 		/* We do not support size values which don't fit in 64 bit. */
 524 13b2bc37 2022-10-23 stsp 		if (i > 9)
 525 13b2bc37 2022-10-23 stsp 			return got_error_fmt(GOT_ERR_OBJ_TOO_LARGE,
 526 22ec3416 2022-10-25 op 			    "packfile offset %lld", (long long)obj_offset);
 527 13b2bc37 2022-10-23 stsp 
 528 13b2bc37 2022-10-23 stsp 		if (buf_len(buf) - *buf_pos < sizeof(sizebuf[0])) {
 529 13b2bc37 2022-10-23 stsp 			err = read_more_pack_stream(infd, buf,
 530 13b2bc37 2022-10-23 stsp 			    sizeof(sizebuf[0]));
 531 13b2bc37 2022-10-23 stsp 			if (err)
 532 13b2bc37 2022-10-23 stsp 				return err;
 533 13b2bc37 2022-10-23 stsp 		}
 534 13b2bc37 2022-10-23 stsp 
 535 13b2bc37 2022-10-23 stsp 		sizebuf[i] = buf_getc(buf, *buf_pos);
 536 13b2bc37 2022-10-23 stsp 		*buf_pos += sizeof(sizebuf[i]);
 537 13b2bc37 2022-10-23 stsp 
 538 13b2bc37 2022-10-23 stsp 		if (i == 0) {
 539 13b2bc37 2022-10-23 stsp 			t = (sizebuf[i] & GOT_PACK_OBJ_SIZE0_TYPE_MASK) >>
 540 13b2bc37 2022-10-23 stsp 			    GOT_PACK_OBJ_SIZE0_TYPE_MASK_SHIFT;
 541 13b2bc37 2022-10-23 stsp 			s = (sizebuf[i] & GOT_PACK_OBJ_SIZE0_VAL_MASK);
 542 13b2bc37 2022-10-23 stsp 		} else {
 543 13b2bc37 2022-10-23 stsp 			size_t shift = 4 + 7 * (i - 1);
 544 13b2bc37 2022-10-23 stsp 			s |= ((sizebuf[i] & GOT_PACK_OBJ_SIZE_VAL_MASK) <<
 545 13b2bc37 2022-10-23 stsp 			    shift);
 546 13b2bc37 2022-10-23 stsp 		}
 547 13b2bc37 2022-10-23 stsp 		i++;
 548 13b2bc37 2022-10-23 stsp 	} while (sizebuf[i - 1] & GOT_PACK_OBJ_SIZE_MORE);
 549 13b2bc37 2022-10-23 stsp 
 550 13b2bc37 2022-10-23 stsp 	err = got_pack_hwrite(outfd, sizebuf, i, ctx);
 551 13b2bc37 2022-10-23 stsp 	if (err)
 552 13b2bc37 2022-10-23 stsp 		return err;
 553 13b2bc37 2022-10-23 stsp 	*outsize += i;
 554 13b2bc37 2022-10-23 stsp 
 555 13b2bc37 2022-10-23 stsp 	*type = t;
 556 13b2bc37 2022-10-23 stsp 	*size = s;
 557 13b2bc37 2022-10-23 stsp 	return NULL;
 558 13b2bc37 2022-10-23 stsp }
 559 13b2bc37 2022-10-23 stsp 
 560 13b2bc37 2022-10-23 stsp static const struct got_error *
 561 13b2bc37 2022-10-23 stsp copy_ref_delta(int infd, int outfd, off_t *outsize, BUF *buf, size_t *buf_pos,
 562 13b2bc37 2022-10-23 stsp     SHA1_CTX *ctx)
 563 13b2bc37 2022-10-23 stsp {
 564 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
 565 13b2bc37 2022-10-23 stsp 	size_t remain = buf_len(buf) - *buf_pos;
 566 13b2bc37 2022-10-23 stsp 
 567 13b2bc37 2022-10-23 stsp 	if (remain < SHA1_DIGEST_LENGTH) {
 568 13b2bc37 2022-10-23 stsp 		err = read_more_pack_stream(infd, buf,
 569 13b2bc37 2022-10-23 stsp 		    SHA1_DIGEST_LENGTH - remain);
 570 13b2bc37 2022-10-23 stsp 		if (err)
 571 13b2bc37 2022-10-23 stsp 			return err;
 572 13b2bc37 2022-10-23 stsp 	}
 573 13b2bc37 2022-10-23 stsp 
 574 13b2bc37 2022-10-23 stsp 	err = got_pack_hwrite(outfd, buf_get(buf) + *buf_pos,
 575 13b2bc37 2022-10-23 stsp 	    SHA1_DIGEST_LENGTH, ctx);
 576 13b2bc37 2022-10-23 stsp 	if (err)
 577 13b2bc37 2022-10-23 stsp 		return err;
 578 13b2bc37 2022-10-23 stsp 
 579 13b2bc37 2022-10-23 stsp 	*buf_pos += SHA1_DIGEST_LENGTH;
 580 13b2bc37 2022-10-23 stsp 	return NULL;
 581 13b2bc37 2022-10-23 stsp }
 582 13b2bc37 2022-10-23 stsp 
 583 13b2bc37 2022-10-23 stsp static const struct got_error *
 584 13b2bc37 2022-10-23 stsp copy_offset_delta(int infd, int outfd, off_t *outsize, BUF *buf, size_t *buf_pos,
 585 13b2bc37 2022-10-23 stsp     SHA1_CTX *ctx)
 586 13b2bc37 2022-10-23 stsp {
 587 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
 588 13b2bc37 2022-10-23 stsp 	uint64_t o = 0;
 589 13b2bc37 2022-10-23 stsp 	uint8_t offbuf[8];
 590 13b2bc37 2022-10-23 stsp 	size_t i = 0;
 591 13b2bc37 2022-10-23 stsp 	off_t obj_offset = *outsize;
 592 13b2bc37 2022-10-23 stsp 
 593 13b2bc37 2022-10-23 stsp 	do {
 594 13b2bc37 2022-10-23 stsp 		/* We do not support offset values which don't fit in 64 bit. */
 595 13b2bc37 2022-10-23 stsp 		if (i > 8)
 596 13b2bc37 2022-10-23 stsp 			return got_error_fmt(GOT_ERR_OBJ_TOO_LARGE,
 597 22ec3416 2022-10-25 op 			    "packfile offset %lld", (long long)obj_offset);
 598 13b2bc37 2022-10-23 stsp 
 599 13b2bc37 2022-10-23 stsp 		if (buf_len(buf) - *buf_pos < sizeof(offbuf[0])) {
 600 13b2bc37 2022-10-23 stsp 			err = read_more_pack_stream(infd, buf,
 601 13b2bc37 2022-10-23 stsp 			    sizeof(offbuf[0]));
 602 13b2bc37 2022-10-23 stsp 			if (err)
 603 13b2bc37 2022-10-23 stsp 				return err;
 604 13b2bc37 2022-10-23 stsp 		}
 605 13b2bc37 2022-10-23 stsp 
 606 13b2bc37 2022-10-23 stsp 		offbuf[i] = buf_getc(buf, *buf_pos);
 607 13b2bc37 2022-10-23 stsp 		*buf_pos += sizeof(offbuf[i]);
 608 13b2bc37 2022-10-23 stsp 
 609 13b2bc37 2022-10-23 stsp 		if (i == 0)
 610 13b2bc37 2022-10-23 stsp 			o = (offbuf[i] & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
 611 13b2bc37 2022-10-23 stsp 		else {
 612 13b2bc37 2022-10-23 stsp 			o++;
 613 13b2bc37 2022-10-23 stsp 			o <<= 7;
 614 13b2bc37 2022-10-23 stsp 			o += (offbuf[i] & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
 615 13b2bc37 2022-10-23 stsp 		}
 616 13b2bc37 2022-10-23 stsp 		i++;
 617 13b2bc37 2022-10-23 stsp 	} while (offbuf[i - 1] & GOT_PACK_OBJ_DELTA_OFF_MORE);
 618 13b2bc37 2022-10-23 stsp 
 619 13b2bc37 2022-10-23 stsp 	if (o < sizeof(struct got_packfile_hdr) || o > *outsize)
 620 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PACK_OFFSET);
 621 13b2bc37 2022-10-23 stsp 
 622 13b2bc37 2022-10-23 stsp 	err = got_pack_hwrite(outfd, offbuf, i, ctx);
 623 13b2bc37 2022-10-23 stsp 	if (err)
 624 13b2bc37 2022-10-23 stsp 		return err;
 625 13b2bc37 2022-10-23 stsp 
 626 13b2bc37 2022-10-23 stsp 	*outsize += i;
 627 13b2bc37 2022-10-23 stsp 	return NULL;
 628 13b2bc37 2022-10-23 stsp }
 629 13b2bc37 2022-10-23 stsp 
 630 13b2bc37 2022-10-23 stsp static const struct got_error *
 631 13b2bc37 2022-10-23 stsp copy_zstream(int infd, int outfd, off_t *outsize, BUF *buf, size_t *buf_pos,
 632 13b2bc37 2022-10-23 stsp     SHA1_CTX *ctx)
 633 13b2bc37 2022-10-23 stsp {
 634 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
 635 13b2bc37 2022-10-23 stsp 	z_stream z;
 636 13b2bc37 2022-10-23 stsp 	int zret;
 637 13b2bc37 2022-10-23 stsp 	char voidbuf[1024];
 638 13b2bc37 2022-10-23 stsp 	size_t consumed_total = 0;
 639 13b2bc37 2022-10-23 stsp 	off_t zstream_offset = *outsize;
 640 13b2bc37 2022-10-23 stsp 
 641 13b2bc37 2022-10-23 stsp 	memset(&z, 0, sizeof(z));
 642 13b2bc37 2022-10-23 stsp 
 643 13b2bc37 2022-10-23 stsp 	z.zalloc = Z_NULL;
 644 13b2bc37 2022-10-23 stsp 	z.zfree = Z_NULL;
 645 13b2bc37 2022-10-23 stsp 	zret = inflateInit(&z);
 646 13b2bc37 2022-10-23 stsp 	if (zret != Z_OK) {
 647 13b2bc37 2022-10-23 stsp 		if  (zret == Z_ERRNO)
 648 13b2bc37 2022-10-23 stsp 			return got_error_from_errno("inflateInit");
 649 13b2bc37 2022-10-23 stsp 		if  (zret == Z_MEM_ERROR) {
 650 13b2bc37 2022-10-23 stsp 			errno = ENOMEM;
 651 13b2bc37 2022-10-23 stsp 			return got_error_from_errno("inflateInit");
 652 13b2bc37 2022-10-23 stsp 		}
 653 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_DECOMPRESSION,
 654 13b2bc37 2022-10-23 stsp 		    "inflateInit failed");
 655 13b2bc37 2022-10-23 stsp 	}
 656 13b2bc37 2022-10-23 stsp 
 657 13b2bc37 2022-10-23 stsp 	while (zret != Z_STREAM_END) {
 658 13b2bc37 2022-10-23 stsp 		size_t last_total_in, consumed;
 659 13b2bc37 2022-10-23 stsp 
 660 13b2bc37 2022-10-23 stsp 		/*
 661 13b2bc37 2022-10-23 stsp 		 * Decompress into the void. Object data will be parsed
 662 13b2bc37 2022-10-23 stsp 		 * later, when the pack file is indexed. For now, we just
 663 13b2bc37 2022-10-23 stsp 		 * want to locate the end of the compressed stream.
 664 13b2bc37 2022-10-23 stsp 		 */
 665 13b2bc37 2022-10-23 stsp 		while (zret != Z_STREAM_END && buf_len(buf) - *buf_pos > 0) {
 666 13b2bc37 2022-10-23 stsp 			last_total_in = z.total_in;
 667 13b2bc37 2022-10-23 stsp 			z.next_in = buf_get(buf) + *buf_pos;
 668 13b2bc37 2022-10-23 stsp 			z.avail_in = buf_len(buf) - *buf_pos;
 669 13b2bc37 2022-10-23 stsp 			z.next_out = voidbuf;
 670 13b2bc37 2022-10-23 stsp 			z.avail_out = sizeof(voidbuf);
 671 13b2bc37 2022-10-23 stsp 
 672 13b2bc37 2022-10-23 stsp 			zret = inflate(&z, Z_SYNC_FLUSH);
 673 13b2bc37 2022-10-23 stsp 			if (zret != Z_OK && zret != Z_BUF_ERROR &&
 674 13b2bc37 2022-10-23 stsp 			    zret != Z_STREAM_END) {
 675 13b2bc37 2022-10-23 stsp 				err = got_error_fmt(GOT_ERR_DECOMPRESSION,
 676 22ec3416 2022-10-25 op 				    "packfile offset %lld",
 677 22ec3416 2022-10-25 op 				    (long long)zstream_offset);
 678 13b2bc37 2022-10-23 stsp 				goto done;
 679 13b2bc37 2022-10-23 stsp 			}
 680 13b2bc37 2022-10-23 stsp 			consumed = z.total_in - last_total_in;
 681 13b2bc37 2022-10-23 stsp 
 682 13b2bc37 2022-10-23 stsp 			err = got_pack_hwrite(outfd, buf_get(buf) + *buf_pos,
 683 13b2bc37 2022-10-23 stsp 			    consumed, ctx);
 684 13b2bc37 2022-10-23 stsp 			if (err)
 685 13b2bc37 2022-10-23 stsp 				goto done;
 686 13b2bc37 2022-10-23 stsp 
 687 13b2bc37 2022-10-23 stsp 			err = buf_discard(buf, *buf_pos + consumed);
 688 13b2bc37 2022-10-23 stsp 			if (err)
 689 13b2bc37 2022-10-23 stsp 				goto done;
 690 13b2bc37 2022-10-23 stsp 			*buf_pos = 0;
 691 13b2bc37 2022-10-23 stsp 
 692 13b2bc37 2022-10-23 stsp 			consumed_total += consumed;
 693 13b2bc37 2022-10-23 stsp 		}
 694 13b2bc37 2022-10-23 stsp 
 695 13b2bc37 2022-10-23 stsp 		if (zret != Z_STREAM_END) {
 696 13b2bc37 2022-10-23 stsp 			err = read_more_pack_stream(infd, buf, 1);
 697 13b2bc37 2022-10-23 stsp 			if (err)
 698 13b2bc37 2022-10-23 stsp 				goto done;
 699 13b2bc37 2022-10-23 stsp 		}
 700 13b2bc37 2022-10-23 stsp 	}
 701 13b2bc37 2022-10-23 stsp 
 702 13b2bc37 2022-10-23 stsp 	if (err == NULL)
 703 13b2bc37 2022-10-23 stsp 		*outsize += consumed_total;
 704 13b2bc37 2022-10-23 stsp done:
 705 13b2bc37 2022-10-23 stsp 	inflateEnd(&z);
 706 13b2bc37 2022-10-23 stsp 	return err;
 707 13b2bc37 2022-10-23 stsp }
 708 13b2bc37 2022-10-23 stsp 
 709 13b2bc37 2022-10-23 stsp static const struct got_error *
 710 13b2bc37 2022-10-23 stsp validate_object_type(int obj_type)
 711 13b2bc37 2022-10-23 stsp {
 712 13b2bc37 2022-10-23 stsp 	switch (obj_type) {
 713 13b2bc37 2022-10-23 stsp 	case GOT_OBJ_TYPE_BLOB:
 714 13b2bc37 2022-10-23 stsp 	case GOT_OBJ_TYPE_COMMIT:
 715 13b2bc37 2022-10-23 stsp 	case GOT_OBJ_TYPE_TREE:
 716 13b2bc37 2022-10-23 stsp 	case GOT_OBJ_TYPE_TAG:
 717 13b2bc37 2022-10-23 stsp 	case GOT_OBJ_TYPE_REF_DELTA:
 718 13b2bc37 2022-10-23 stsp 	case GOT_OBJ_TYPE_OFFSET_DELTA:
 719 13b2bc37 2022-10-23 stsp 		return NULL;
 720 13b2bc37 2022-10-23 stsp 	default:
 721 13b2bc37 2022-10-23 stsp 		break;
 722 13b2bc37 2022-10-23 stsp 	}
 723 13b2bc37 2022-10-23 stsp 
 724 13b2bc37 2022-10-23 stsp 	return got_error(GOT_ERR_OBJ_TYPE);
 725 13b2bc37 2022-10-23 stsp }
 726 13b2bc37 2022-10-23 stsp 
 727 13b2bc37 2022-10-23 stsp static const struct got_error *
 728 13b2bc37 2022-10-23 stsp recv_packdata(off_t *outsize, uint8_t *sha1, int infd, int outfd)
 729 13b2bc37 2022-10-23 stsp {
 730 13b2bc37 2022-10-23 stsp 	const struct got_error *err;
 731 13b2bc37 2022-10-23 stsp 	struct got_packfile_hdr hdr;
 732 13b2bc37 2022-10-23 stsp 	size_t have;
 733 13b2bc37 2022-10-23 stsp 	uint32_t nobj, nhave = 0;
 734 13b2bc37 2022-10-23 stsp 	SHA1_CTX ctx;
 735 13b2bc37 2022-10-23 stsp 	uint8_t expected_sha1[SHA1_DIGEST_LENGTH];
 736 13b2bc37 2022-10-23 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
 737 13b2bc37 2022-10-23 stsp 	BUF *buf = NULL;
 738 13b2bc37 2022-10-23 stsp 	size_t buf_pos = 0, remain;
 739 13b2bc37 2022-10-23 stsp 	ssize_t w;
 740 13b2bc37 2022-10-23 stsp 
 741 13b2bc37 2022-10-23 stsp 	*outsize = 0;
 742 13b2bc37 2022-10-23 stsp 	SHA1Init(&ctx);
 743 13b2bc37 2022-10-23 stsp 
 744 13b2bc37 2022-10-23 stsp 	err = got_poll_read_full(infd, &have, &hdr, sizeof(hdr), sizeof(hdr));
 745 13b2bc37 2022-10-23 stsp 	if (err)
 746 13b2bc37 2022-10-23 stsp 		return err;
 747 13b2bc37 2022-10-23 stsp 	if (have != sizeof(hdr))
 748 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_BAD_PACKFILE, "short pack file");
 749 13b2bc37 2022-10-23 stsp 	*outsize += have;
 750 13b2bc37 2022-10-23 stsp 
 751 13b2bc37 2022-10-23 stsp 	if (hdr.signature != htobe32(GOT_PACKFILE_SIGNATURE))
 752 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_BAD_PACKFILE,
 753 13b2bc37 2022-10-23 stsp 		    "bad packfile signature");
 754 13b2bc37 2022-10-23 stsp 	if (hdr.version != htobe32(GOT_PACKFILE_VERSION))
 755 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_BAD_PACKFILE,
 756 13b2bc37 2022-10-23 stsp 		    "bad packfile version");
 757 13b2bc37 2022-10-23 stsp 
 758 13b2bc37 2022-10-23 stsp 	nobj = be32toh(hdr.nobjects);
 759 13b2bc37 2022-10-23 stsp 	if (nobj == 0)
 760 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_BAD_PACKFILE,
 761 13b2bc37 2022-10-23 stsp 		    "bad packfile with zero objects");
 762 13b2bc37 2022-10-23 stsp 
 763 13b2bc37 2022-10-23 stsp 	log_debug("expecting %d objects", nobj);
 764 13b2bc37 2022-10-23 stsp 
 765 13b2bc37 2022-10-23 stsp 	err = got_pack_hwrite(outfd, &hdr, sizeof(hdr), &ctx);
 766 13b2bc37 2022-10-23 stsp 	if (err)
 767 13b2bc37 2022-10-23 stsp 		return err;
 768 13b2bc37 2022-10-23 stsp 
 769 13b2bc37 2022-10-23 stsp 	err = buf_alloc(&buf, 65536);
 770 13b2bc37 2022-10-23 stsp 	if (err)
 771 13b2bc37 2022-10-23 stsp 		return err;
 772 13b2bc37 2022-10-23 stsp 
 773 13b2bc37 2022-10-23 stsp 	while (nhave != nobj) {
 774 13b2bc37 2022-10-23 stsp 		uint8_t obj_type;
 775 13b2bc37 2022-10-23 stsp 		uint64_t obj_size;
 776 13b2bc37 2022-10-23 stsp 
 777 13b2bc37 2022-10-23 stsp 		err = copy_object_type_and_size(&obj_type, &obj_size,
 778 13b2bc37 2022-10-23 stsp 		    infd, outfd, outsize, buf, &buf_pos, &ctx);
 779 13b2bc37 2022-10-23 stsp 		if (err)
 780 13b2bc37 2022-10-23 stsp 			goto done;
 781 13b2bc37 2022-10-23 stsp 
 782 13b2bc37 2022-10-23 stsp 		err = validate_object_type(obj_type);
 783 13b2bc37 2022-10-23 stsp 		if (err)
 784 13b2bc37 2022-10-23 stsp 			goto done;
 785 13b2bc37 2022-10-23 stsp 
 786 13b2bc37 2022-10-23 stsp 		if (obj_type == GOT_OBJ_TYPE_REF_DELTA) {
 787 13b2bc37 2022-10-23 stsp 			err = copy_ref_delta(infd, outfd, outsize,
 788 13b2bc37 2022-10-23 stsp 			    buf, &buf_pos, &ctx);
 789 13b2bc37 2022-10-23 stsp 			if (err)
 790 13b2bc37 2022-10-23 stsp 				goto done;
 791 13b2bc37 2022-10-23 stsp 		} else if (obj_type == GOT_OBJ_TYPE_OFFSET_DELTA) {
 792 13b2bc37 2022-10-23 stsp 			err = copy_offset_delta(infd, outfd, outsize,
 793 13b2bc37 2022-10-23 stsp 			    buf, &buf_pos, &ctx);
 794 13b2bc37 2022-10-23 stsp 			if (err)
 795 13b2bc37 2022-10-23 stsp 				goto done;
 796 13b2bc37 2022-10-23 stsp 		}
 797 13b2bc37 2022-10-23 stsp 
 798 13b2bc37 2022-10-23 stsp 		err = copy_zstream(infd, outfd, outsize, buf, &buf_pos, &ctx);
 799 13b2bc37 2022-10-23 stsp 		if (err)
 800 13b2bc37 2022-10-23 stsp 			goto done;
 801 13b2bc37 2022-10-23 stsp 
 802 13b2bc37 2022-10-23 stsp 		nhave++;
 803 13b2bc37 2022-10-23 stsp 	}
 804 13b2bc37 2022-10-23 stsp 
 805 13b2bc37 2022-10-23 stsp 	log_debug("received %u objects", nobj);
 806 13b2bc37 2022-10-23 stsp 
 807 13b2bc37 2022-10-23 stsp 	SHA1Final(expected_sha1, &ctx);
 808 13b2bc37 2022-10-23 stsp 
 809 13b2bc37 2022-10-23 stsp 	remain = buf_len(buf) - buf_pos;
 810 13b2bc37 2022-10-23 stsp 	if (remain < SHA1_DIGEST_LENGTH) {
 811 13b2bc37 2022-10-23 stsp 		err = read_more_pack_stream(infd, buf,
 812 13b2bc37 2022-10-23 stsp 		    SHA1_DIGEST_LENGTH - remain);
 813 13b2bc37 2022-10-23 stsp 		if (err)
 814 13b2bc37 2022-10-23 stsp 			return err;
 815 13b2bc37 2022-10-23 stsp 	}
 816 13b2bc37 2022-10-23 stsp 
 817 13b2bc37 2022-10-23 stsp 	got_sha1_digest_to_str(expected_sha1, hex, sizeof(hex));
 818 13b2bc37 2022-10-23 stsp 	log_debug("expect SHA1: %s", hex);
 819 13b2bc37 2022-10-23 stsp 	got_sha1_digest_to_str(buf_get(buf) + buf_pos, hex, sizeof(hex));
 820 13b2bc37 2022-10-23 stsp 	log_debug("actual SHA1: %s", hex);
 821 13b2bc37 2022-10-23 stsp 
 822 13b2bc37 2022-10-23 stsp 	if (memcmp(buf_get(buf) + buf_pos, expected_sha1,
 823 13b2bc37 2022-10-23 stsp 	    SHA1_DIGEST_LENGTH) != 0) {
 824 13b2bc37 2022-10-23 stsp 		err = got_error(GOT_ERR_PACKFILE_CSUM);
 825 13b2bc37 2022-10-23 stsp 		goto done;
 826 13b2bc37 2022-10-23 stsp 	}
 827 13b2bc37 2022-10-23 stsp 
 828 13b2bc37 2022-10-23 stsp 	memcpy(sha1, expected_sha1, SHA1_DIGEST_LENGTH);
 829 13b2bc37 2022-10-23 stsp 
 830 13b2bc37 2022-10-23 stsp 	w = write(outfd, expected_sha1, SHA1_DIGEST_LENGTH);
 831 13b2bc37 2022-10-23 stsp 	if (w == -1) {
 832 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("write");
 833 13b2bc37 2022-10-23 stsp 		goto done;
 834 13b2bc37 2022-10-23 stsp 	}
 835 13b2bc37 2022-10-23 stsp 	if (w != SHA1_DIGEST_LENGTH) {
 836 13b2bc37 2022-10-23 stsp 		err = got_error(GOT_ERR_IO);
 837 13b2bc37 2022-10-23 stsp 		goto done;
 838 13b2bc37 2022-10-23 stsp 	}
 839 13b2bc37 2022-10-23 stsp 
 840 13b2bc37 2022-10-23 stsp 	*outsize += SHA1_DIGEST_LENGTH;
 841 13b2bc37 2022-10-23 stsp 
 842 13b2bc37 2022-10-23 stsp 	if (fsync(outfd) == -1) {
 843 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("fsync");
 844 13b2bc37 2022-10-23 stsp 		goto done;
 845 13b2bc37 2022-10-23 stsp 	}
 846 13b2bc37 2022-10-23 stsp 	if (lseek(outfd, 0L, SEEK_SET) == -1) {
 847 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("lseek");
 848 13b2bc37 2022-10-23 stsp 		goto done;
 849 13b2bc37 2022-10-23 stsp 	}
 850 13b2bc37 2022-10-23 stsp done:
 851 13b2bc37 2022-10-23 stsp 	buf_free(buf);
 852 13b2bc37 2022-10-23 stsp 	return err;
 853 13b2bc37 2022-10-23 stsp }
 854 13b2bc37 2022-10-23 stsp 
 855 13b2bc37 2022-10-23 stsp static const struct got_error *
 856 13b2bc37 2022-10-23 stsp report_pack_status(struct repo_write_client *client,
 857 13b2bc37 2022-10-23 stsp     const struct got_error *unpack_err)
 858 13b2bc37 2022-10-23 stsp {
 859 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
 860 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_status istatus;
 861 13b2bc37 2022-10-23 stsp 	struct ibuf *wbuf;
 862 13b2bc37 2022-10-23 stsp 	struct imsgbuf ibuf;
 863 13b2bc37 2022-10-23 stsp 	const char *unpack_ok = "unpack ok\n";
 864 13b2bc37 2022-10-23 stsp 	size_t len;
 865 13b2bc37 2022-10-23 stsp 	
 866 13b2bc37 2022-10-23 stsp 	imsg_init(&ibuf, client->fd);
 867 13b2bc37 2022-10-23 stsp 
 868 13b2bc37 2022-10-23 stsp 	if (unpack_err)
 869 13b2bc37 2022-10-23 stsp 		istatus.reason_len = strlen(unpack_err->msg);
 870 13b2bc37 2022-10-23 stsp 	else
 871 13b2bc37 2022-10-23 stsp 		istatus.reason_len = strlen(unpack_ok);
 872 13b2bc37 2022-10-23 stsp 
 873 13b2bc37 2022-10-23 stsp 	len = sizeof(istatus) + istatus.reason_len;
 874 13b2bc37 2022-10-23 stsp 	wbuf = imsg_create(&ibuf, GOTD_IMSG_PACKFILE_STATUS, PROC_REPO_WRITE,
 875 13b2bc37 2022-10-23 stsp 	    repo_write.pid, len);
 876 13b2bc37 2022-10-23 stsp 	if (wbuf == NULL) {
 877 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_create PACKFILE_STATUS");
 878 13b2bc37 2022-10-23 stsp 		goto done;
 879 13b2bc37 2022-10-23 stsp 	}
 880 13b2bc37 2022-10-23 stsp 
 881 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, &istatus, sizeof(istatus)) == -1) {
 882 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add PACKFILE_STATUS");
 883 13b2bc37 2022-10-23 stsp 		goto done;
 884 13b2bc37 2022-10-23 stsp 	}
 885 13b2bc37 2022-10-23 stsp 
 886 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, err ? err->msg : unpack_ok,
 887 13b2bc37 2022-10-23 stsp 	    istatus.reason_len) == -1) {
 888 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg_add PACKFILE_STATUS");
 889 13b2bc37 2022-10-23 stsp 		goto done;
 890 13b2bc37 2022-10-23 stsp 	}
 891 13b2bc37 2022-10-23 stsp 
 892 13b2bc37 2022-10-23 stsp 	wbuf->fd = -1;
 893 13b2bc37 2022-10-23 stsp 	imsg_close(&ibuf, wbuf);
 894 13b2bc37 2022-10-23 stsp 
 895 13b2bc37 2022-10-23 stsp 	err = gotd_imsg_flush(&ibuf);
 896 13b2bc37 2022-10-23 stsp done:
 897 13b2bc37 2022-10-23 stsp 	imsg_clear(&ibuf);
 898 13b2bc37 2022-10-23 stsp 	return err;
 899 13b2bc37 2022-10-23 stsp }
 900 13b2bc37 2022-10-23 stsp 
 901 13b2bc37 2022-10-23 stsp static const struct got_error *
 902 13b2bc37 2022-10-23 stsp recv_packfile(struct repo_write_client **client, struct imsg *imsg)
 903 13b2bc37 2022-10-23 stsp {
 904 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL, *unpack_err;
 905 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_recv_packfile ireq;
 906 13b2bc37 2022-10-23 stsp 	FILE *tempfiles[3] = { NULL, NULL, NULL };
 907 13b2bc37 2022-10-23 stsp 	struct repo_tempfile {
 908 13b2bc37 2022-10-23 stsp 		int fd;
 909 13b2bc37 2022-10-23 stsp 		int idx;
 910 13b2bc37 2022-10-23 stsp 	} repo_tempfiles[3] = { { - 1, - 1 }, { - 1, - 1 }, { - 1, - 1 }, };
 911 13b2bc37 2022-10-23 stsp 	int i;
 912 13b2bc37 2022-10-23 stsp 	size_t datalen;
 913 13b2bc37 2022-10-23 stsp 	struct imsgbuf ibuf;
 914 13b2bc37 2022-10-23 stsp 	struct got_ratelimit rl;
 915 13b2bc37 2022-10-23 stsp 	struct got_pack *pack = NULL;
 916 13b2bc37 2022-10-23 stsp 	off_t pack_filesize = 0;
 917 13b2bc37 2022-10-23 stsp 
 918 13b2bc37 2022-10-23 stsp 	log_debug("packfile request received");
 919 13b2bc37 2022-10-23 stsp 
 920 13b2bc37 2022-10-23 stsp 	got_ratelimit_init(&rl, 2, 0);
 921 13b2bc37 2022-10-23 stsp 
 922 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 923 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq))
 924 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 925 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, sizeof(ireq));
 926 13b2bc37 2022-10-23 stsp 
 927 13b2bc37 2022-10-23 stsp 	*client = find_client(ireq.client_id);
 928 13b2bc37 2022-10-23 stsp 	if (*client == NULL || STAILQ_EMPTY(&(*client)->ref_updates))
 929 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_CLIENT_ID);
 930 13b2bc37 2022-10-23 stsp 
 931 7fec5f4a 2022-10-28 stsp 	if ((*client)->pack_pipe == -1 ||
 932 13b2bc37 2022-10-23 stsp 	    (*client)->packidx_fd == -1)
 933 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
 934 13b2bc37 2022-10-23 stsp 
 935 13b2bc37 2022-10-23 stsp 	imsg_init(&ibuf, (*client)->fd);
 936 13b2bc37 2022-10-23 stsp 
 937 13b2bc37 2022-10-23 stsp 	if (imsg->fd == -1)
 938 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
 939 13b2bc37 2022-10-23 stsp 
 940 13b2bc37 2022-10-23 stsp 	pack = &(*client)->pack;
 941 13b2bc37 2022-10-23 stsp 	memset(pack, 0, sizeof(*pack));
 942 13b2bc37 2022-10-23 stsp 	pack->fd = imsg->fd;
 943 13b2bc37 2022-10-23 stsp 	err = got_delta_cache_alloc(&pack->delta_cache);
 944 13b2bc37 2022-10-23 stsp 	if (err)
 945 13b2bc37 2022-10-23 stsp 		return err;
 946 13b2bc37 2022-10-23 stsp 
 947 13b2bc37 2022-10-23 stsp 	for (i = 0; i < nitems(repo_tempfiles); i++) {
 948 13b2bc37 2022-10-23 stsp 		struct repo_tempfile *t = &repo_tempfiles[i];
 949 13b2bc37 2022-10-23 stsp 		err = got_repo_temp_fds_get(&t->fd, &t->idx, repo_write.repo);
 950 13b2bc37 2022-10-23 stsp 		if (err)
 951 13b2bc37 2022-10-23 stsp 			goto done;
 952 13b2bc37 2022-10-23 stsp 	}
 953 13b2bc37 2022-10-23 stsp 
 954 13b2bc37 2022-10-23 stsp 	for (i = 0; i < nitems(tempfiles); i++) {
 955 13b2bc37 2022-10-23 stsp 		int fd = dup(repo_tempfiles[i].fd);
 956 13b2bc37 2022-10-23 stsp 		FILE *f;
 957 13b2bc37 2022-10-23 stsp 		if (fd == -1) {
 958 13b2bc37 2022-10-23 stsp 			err = got_error_from_errno("dup");
 959 13b2bc37 2022-10-23 stsp 			goto done;
 960 13b2bc37 2022-10-23 stsp 		}
 961 13b2bc37 2022-10-23 stsp 		f = fdopen(fd, "w+");
 962 13b2bc37 2022-10-23 stsp 		if (f == NULL) {
 963 13b2bc37 2022-10-23 stsp 			err = got_error_from_errno("dup");
 964 13b2bc37 2022-10-23 stsp 			close(fd);
 965 13b2bc37 2022-10-23 stsp 			goto done;
 966 13b2bc37 2022-10-23 stsp 		}
 967 13b2bc37 2022-10-23 stsp 		tempfiles[i] = f;
 968 13b2bc37 2022-10-23 stsp 	}
 969 13b2bc37 2022-10-23 stsp 
 970 13b2bc37 2022-10-23 stsp 	err = gotd_imsg_flush(&ibuf);
 971 13b2bc37 2022-10-23 stsp 	if (err)
 972 13b2bc37 2022-10-23 stsp 		goto done;
 973 13b2bc37 2022-10-23 stsp 
 974 13b2bc37 2022-10-23 stsp 	log_debug("receiving pack data");
 975 13b2bc37 2022-10-23 stsp 	unpack_err = recv_packdata(&pack_filesize, (*client)->pack_sha1,
 976 7fec5f4a 2022-10-28 stsp 	    (*client)->pack_pipe, pack->fd);
 977 13b2bc37 2022-10-23 stsp 	if (ireq.report_status) {
 978 13b2bc37 2022-10-23 stsp 		err = report_pack_status(*client, unpack_err);
 979 13b2bc37 2022-10-23 stsp 		if (err) {
 980 13b2bc37 2022-10-23 stsp 			/* Git clients hang up after sending the pack file. */
 981 13b2bc37 2022-10-23 stsp 			if (err->code == GOT_ERR_EOF)
 982 13b2bc37 2022-10-23 stsp 				err = NULL;
 983 13b2bc37 2022-10-23 stsp 		}
 984 13b2bc37 2022-10-23 stsp 	}
 985 13b2bc37 2022-10-23 stsp 	if (unpack_err)
 986 13b2bc37 2022-10-23 stsp 		err = unpack_err;
 987 13b2bc37 2022-10-23 stsp 	if (err)
 988 13b2bc37 2022-10-23 stsp 		goto done;
 989 13b2bc37 2022-10-23 stsp 
 990 13b2bc37 2022-10-23 stsp 	log_debug("pack data received");
 991 13b2bc37 2022-10-23 stsp 
 992 13b2bc37 2022-10-23 stsp 	pack->filesize = pack_filesize;
 993 13b2bc37 2022-10-23 stsp 
 994 ad4cc361 2022-10-27 op 	log_debug("begin indexing pack (%lld bytes in size)",
 995 ad4cc361 2022-10-27 op 	    (long long)pack->filesize);
 996 13b2bc37 2022-10-23 stsp 	err = got_pack_index(pack, (*client)->packidx_fd,
 997 13b2bc37 2022-10-23 stsp 	    tempfiles[0], tempfiles[1], tempfiles[2], (*client)->pack_sha1,
 998 13b2bc37 2022-10-23 stsp 	    pack_index_progress, NULL, &rl);
 999 13b2bc37 2022-10-23 stsp 	if (err)
1000 13b2bc37 2022-10-23 stsp 		goto done;
1001 13b2bc37 2022-10-23 stsp 	log_debug("done indexing pack");
1002 13b2bc37 2022-10-23 stsp 
1003 13b2bc37 2022-10-23 stsp 	if (fsync((*client)->packidx_fd) == -1) {
1004 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("fsync");
1005 13b2bc37 2022-10-23 stsp 		goto done;
1006 13b2bc37 2022-10-23 stsp 	}
1007 13b2bc37 2022-10-23 stsp 	if (lseek((*client)->packidx_fd, 0L, SEEK_SET) == -1)
1008 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("lseek");
1009 13b2bc37 2022-10-23 stsp done:
1010 7fec5f4a 2022-10-28 stsp 	if (close((*client)->pack_pipe) == -1 && err == NULL)
1011 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("close");
1012 7fec5f4a 2022-10-28 stsp 	(*client)->pack_pipe = -1;
1013 13b2bc37 2022-10-23 stsp 	for (i = 0; i < nitems(repo_tempfiles); i++) {
1014 13b2bc37 2022-10-23 stsp 		struct repo_tempfile *t = &repo_tempfiles[i];
1015 13b2bc37 2022-10-23 stsp 		if (t->idx != -1)
1016 13b2bc37 2022-10-23 stsp 			got_repo_temp_fds_put(t->idx, repo_write.repo);
1017 13b2bc37 2022-10-23 stsp 	}
1018 13b2bc37 2022-10-23 stsp 	for (i = 0; i < nitems(tempfiles); i++) {
1019 13b2bc37 2022-10-23 stsp 		if (tempfiles[i] && fclose(tempfiles[i]) == EOF && err == NULL)
1020 13b2bc37 2022-10-23 stsp 			err = got_error_from_errno("fclose");
1021 13b2bc37 2022-10-23 stsp 	}
1022 13b2bc37 2022-10-23 stsp 	if (err)
1023 13b2bc37 2022-10-23 stsp 		got_pack_close(pack);
1024 13b2bc37 2022-10-23 stsp 	imsg_clear(&ibuf);
1025 13b2bc37 2022-10-23 stsp 	return err;
1026 13b2bc37 2022-10-23 stsp }
1027 13b2bc37 2022-10-23 stsp 
1028 13b2bc37 2022-10-23 stsp static const struct got_error *
1029 13b2bc37 2022-10-23 stsp verify_packfile(struct repo_write_client *client)
1030 13b2bc37 2022-10-23 stsp {
1031 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL, *close_err;
1032 13b2bc37 2022-10-23 stsp 	struct gotd_ref_update *ref_update;
1033 13b2bc37 2022-10-23 stsp 	struct got_packidx *packidx = NULL;
1034 13b2bc37 2022-10-23 stsp 	struct stat sb;
1035 13b2bc37 2022-10-23 stsp 	char *id_str = NULL;
1036 13b2bc37 2022-10-23 stsp 	int idx = -1;
1037 13b2bc37 2022-10-23 stsp 
1038 13b2bc37 2022-10-23 stsp 	if (STAILQ_EMPTY(&client->ref_updates)) {
1039 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_BAD_REQUEST,
1040 13b2bc37 2022-10-23 stsp 		    "cannot verify pack file without any ref-updates");
1041 13b2bc37 2022-10-23 stsp 	}
1042 13b2bc37 2022-10-23 stsp 
1043 13b2bc37 2022-10-23 stsp 	if (client->pack.fd == -1) {
1044 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_BAD_REQUEST,
1045 13b2bc37 2022-10-23 stsp 		    "invalid pack file handle during pack verification");
1046 13b2bc37 2022-10-23 stsp 	}
1047 13b2bc37 2022-10-23 stsp 	if (client->packidx_fd == -1) {
1048 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_BAD_REQUEST,
1049 13b2bc37 2022-10-23 stsp 		    "invalid pack index handle during pack verification");
1050 13b2bc37 2022-10-23 stsp 	}
1051 13b2bc37 2022-10-23 stsp 
1052 13b2bc37 2022-10-23 stsp 	if (fstat(client->packidx_fd, &sb) == -1)
1053 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("pack index fstat");
1054 13b2bc37 2022-10-23 stsp 
1055 13b2bc37 2022-10-23 stsp 	packidx = malloc(sizeof(*packidx));
1056 13b2bc37 2022-10-23 stsp 	memset(packidx, 0, sizeof(*packidx));
1057 13b2bc37 2022-10-23 stsp 	packidx->fd = client->packidx_fd;
1058 13b2bc37 2022-10-23 stsp 	client->packidx_fd = -1;
1059 13b2bc37 2022-10-23 stsp 	packidx->len = sb.st_size;
1060 13b2bc37 2022-10-23 stsp 	
1061 13b2bc37 2022-10-23 stsp 	err = got_packidx_init_hdr(packidx, 1, client->pack.filesize);
1062 13b2bc37 2022-10-23 stsp 	if (err)
1063 13b2bc37 2022-10-23 stsp 		return err;
1064 13b2bc37 2022-10-23 stsp 
1065 13b2bc37 2022-10-23 stsp 	STAILQ_FOREACH(ref_update, &client->ref_updates, entry) {
1066 13b2bc37 2022-10-23 stsp 		err = got_object_id_str(&id_str, &ref_update->new_id);
1067 13b2bc37 2022-10-23 stsp 		if (err)
1068 13b2bc37 2022-10-23 stsp 			goto done;
1069 13b2bc37 2022-10-23 stsp 
1070 13b2bc37 2022-10-23 stsp 		idx = got_packidx_get_object_idx(packidx, &ref_update->new_id);
1071 13b2bc37 2022-10-23 stsp 		if (idx == -1) {
1072 13b2bc37 2022-10-23 stsp 			err = got_error_fmt(GOT_ERR_BAD_PACKFILE,
1073 13b2bc37 2022-10-23 stsp 			    "advertised object %s is missing from pack file",
1074 13b2bc37 2022-10-23 stsp 			    id_str);
1075 13b2bc37 2022-10-23 stsp 			goto done;
1076 13b2bc37 2022-10-23 stsp 		}
1077 13b2bc37 2022-10-23 stsp 	}
1078 13b2bc37 2022-10-23 stsp 
1079 13b2bc37 2022-10-23 stsp done:	
1080 13b2bc37 2022-10-23 stsp 	close_err = got_packidx_close(packidx);
1081 13b2bc37 2022-10-23 stsp 	if (close_err && err == NULL)
1082 13b2bc37 2022-10-23 stsp 		err = close_err;
1083 13b2bc37 2022-10-23 stsp 	free(id_str);
1084 13b2bc37 2022-10-23 stsp 	return err;
1085 13b2bc37 2022-10-23 stsp }
1086 13b2bc37 2022-10-23 stsp 
1087 13b2bc37 2022-10-23 stsp static const struct got_error *
1088 13b2bc37 2022-10-23 stsp install_packfile(struct repo_write_client *client, struct gotd_imsgev *iev)
1089 13b2bc37 2022-10-23 stsp {
1090 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_install inst;
1091 13b2bc37 2022-10-23 stsp 	int ret;
1092 13b2bc37 2022-10-23 stsp 
1093 13b2bc37 2022-10-23 stsp 	memset(&inst, 0, sizeof(inst));
1094 13b2bc37 2022-10-23 stsp 	inst.client_id = client->id;
1095 13b2bc37 2022-10-23 stsp 	memcpy(inst.pack_sha1, client->pack_sha1, SHA1_DIGEST_LENGTH);
1096 13b2bc37 2022-10-23 stsp 
1097 13b2bc37 2022-10-23 stsp 	ret = gotd_imsg_compose_event(iev, GOTD_IMSG_PACKFILE_INSTALL,
1098 13b2bc37 2022-10-23 stsp 	    PROC_REPO_WRITE, -1, &inst, sizeof(inst));
1099 13b2bc37 2022-10-23 stsp 	if (ret == -1)
1100 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_compose PACKFILE_INSTALL");
1101 13b2bc37 2022-10-23 stsp 
1102 13b2bc37 2022-10-23 stsp 	return NULL;
1103 13b2bc37 2022-10-23 stsp }
1104 13b2bc37 2022-10-23 stsp 
1105 13b2bc37 2022-10-23 stsp static const struct got_error *
1106 13b2bc37 2022-10-23 stsp send_ref_updates_start(struct repo_write_client *client, int nref_updates,
1107 13b2bc37 2022-10-23 stsp     struct gotd_imsgev *iev)
1108 13b2bc37 2022-10-23 stsp {
1109 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_updates_start istart;
1110 13b2bc37 2022-10-23 stsp 	int ret;
1111 13b2bc37 2022-10-23 stsp 
1112 13b2bc37 2022-10-23 stsp 	memset(&istart, 0, sizeof(istart));
1113 13b2bc37 2022-10-23 stsp 	istart.nref_updates = nref_updates;
1114 13b2bc37 2022-10-23 stsp 	istart.client_id = client->id;
1115 13b2bc37 2022-10-23 stsp 
1116 13b2bc37 2022-10-23 stsp 	ret = gotd_imsg_compose_event(iev, GOTD_IMSG_REF_UPDATES_START,
1117 13b2bc37 2022-10-23 stsp 	    PROC_REPO_WRITE, -1, &istart, sizeof(istart));
1118 13b2bc37 2022-10-23 stsp 	if (ret == -1)
1119 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_compose REF_UPDATES_START");
1120 13b2bc37 2022-10-23 stsp 
1121 13b2bc37 2022-10-23 stsp 	return NULL;
1122 13b2bc37 2022-10-23 stsp }
1123 13b2bc37 2022-10-23 stsp 
1124 13b2bc37 2022-10-23 stsp 
1125 13b2bc37 2022-10-23 stsp static const struct got_error *
1126 13b2bc37 2022-10-23 stsp send_ref_update(struct repo_write_client *client,
1127 13b2bc37 2022-10-23 stsp     struct gotd_ref_update *ref_update, struct gotd_imsgev *iev)
1128 13b2bc37 2022-10-23 stsp {
1129 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_update iref;
1130 13b2bc37 2022-10-23 stsp 	const char *refname = got_ref_get_name(ref_update->ref);
1131 13b2bc37 2022-10-23 stsp 	struct ibuf *wbuf;
1132 13b2bc37 2022-10-23 stsp 	size_t len;
1133 13b2bc37 2022-10-23 stsp 
1134 13b2bc37 2022-10-23 stsp 	memset(&iref, 0, sizeof(iref));
1135 13b2bc37 2022-10-23 stsp 	memcpy(iref.old_id, ref_update->old_id.sha1, SHA1_DIGEST_LENGTH);
1136 13b2bc37 2022-10-23 stsp 	memcpy(iref.new_id, ref_update->new_id.sha1, SHA1_DIGEST_LENGTH);
1137 13b2bc37 2022-10-23 stsp 	iref.ref_is_new = ref_update->ref_is_new;
1138 13b2bc37 2022-10-23 stsp 	iref.client_id = client->id;
1139 13b2bc37 2022-10-23 stsp 	iref.name_len = strlen(refname);
1140 13b2bc37 2022-10-23 stsp 
1141 13b2bc37 2022-10-23 stsp 	len = sizeof(iref) + iref.name_len;
1142 13b2bc37 2022-10-23 stsp 	wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_REF_UPDATE, PROC_REPO_WRITE,
1143 13b2bc37 2022-10-23 stsp 	    repo_write.pid, len);
1144 13b2bc37 2022-10-23 stsp 	if (wbuf == NULL)
1145 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_create REF_UPDATE");
1146 13b2bc37 2022-10-23 stsp 
1147 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, &iref, sizeof(iref)) == -1)
1148 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF_UPDATE");
1149 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, refname, iref.name_len) == -1)
1150 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF_UPDATE");
1151 13b2bc37 2022-10-23 stsp 
1152 13b2bc37 2022-10-23 stsp 	wbuf->fd = -1;
1153 13b2bc37 2022-10-23 stsp 	imsg_close(&iev->ibuf, wbuf);
1154 13b2bc37 2022-10-23 stsp 
1155 13b2bc37 2022-10-23 stsp 	gotd_imsg_event_add(iev);
1156 13b2bc37 2022-10-23 stsp 	return NULL;
1157 13b2bc37 2022-10-23 stsp }
1158 13b2bc37 2022-10-23 stsp 
1159 13b2bc37 2022-10-23 stsp static const struct got_error *
1160 13b2bc37 2022-10-23 stsp update_refs(struct repo_write_client *client, struct gotd_imsgev *iev)
1161 13b2bc37 2022-10-23 stsp {
1162 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
1163 13b2bc37 2022-10-23 stsp 	struct gotd_ref_update *ref_update;
1164 13b2bc37 2022-10-23 stsp 
1165 13b2bc37 2022-10-23 stsp 	err = send_ref_updates_start(client, client->nref_updates, iev);
1166 13b2bc37 2022-10-23 stsp 	if (err)
1167 13b2bc37 2022-10-23 stsp 		return err;
1168 13b2bc37 2022-10-23 stsp 
1169 13b2bc37 2022-10-23 stsp 	STAILQ_FOREACH(ref_update, &client->ref_updates, entry) {
1170 13b2bc37 2022-10-23 stsp 		err = send_ref_update(client, ref_update, iev);
1171 13b2bc37 2022-10-23 stsp 		if (err)
1172 13b2bc37 2022-10-23 stsp 			goto done;
1173 13b2bc37 2022-10-23 stsp 	}
1174 13b2bc37 2022-10-23 stsp done:
1175 13b2bc37 2022-10-23 stsp 	return err;
1176 13b2bc37 2022-10-23 stsp }
1177 13b2bc37 2022-10-23 stsp 
1178 13b2bc37 2022-10-23 stsp static const struct got_error *
1179 13b2bc37 2022-10-23 stsp recv_disconnect(struct imsg *imsg)
1180 13b2bc37 2022-10-23 stsp {
1181 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
1182 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_disconnect idisconnect;
1183 13b2bc37 2022-10-23 stsp 	size_t datalen;
1184 7fec5f4a 2022-10-28 stsp 	int client_fd = -1, pack_pipe = -1, idxfd = -1;
1185 13b2bc37 2022-10-23 stsp 	struct repo_write_client *client = NULL;
1186 13b2bc37 2022-10-23 stsp 	uint64_t slot;
1187 13b2bc37 2022-10-23 stsp 
1188 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1189 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(idisconnect))
1190 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1191 13b2bc37 2022-10-23 stsp 	memcpy(&idisconnect, imsg->data, sizeof(idisconnect));
1192 13b2bc37 2022-10-23 stsp 
1193 13b2bc37 2022-10-23 stsp 	log_debug("client disconnecting");
1194 13b2bc37 2022-10-23 stsp 
1195 13b2bc37 2022-10-23 stsp 	client = find_client(idisconnect.client_id);
1196 13b2bc37 2022-10-23 stsp 	if (client == NULL)
1197 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_CLIENT_ID);
1198 13b2bc37 2022-10-23 stsp 
1199 13b2bc37 2022-10-23 stsp 	slot = client_hash(client->id) % nitems(repo_write_clients);
1200 13b2bc37 2022-10-23 stsp 	STAILQ_REMOVE(&repo_write_clients[slot], client, repo_write_client,
1201 13b2bc37 2022-10-23 stsp 	    entry);
1202 13b2bc37 2022-10-23 stsp 	while (!STAILQ_EMPTY(&client->ref_updates)) {
1203 13b2bc37 2022-10-23 stsp 		struct gotd_ref_update *ref_update;
1204 13b2bc37 2022-10-23 stsp 		ref_update = STAILQ_FIRST(&client->ref_updates);
1205 13b2bc37 2022-10-23 stsp 		STAILQ_REMOVE_HEAD(&client->ref_updates, entry);
1206 13b2bc37 2022-10-23 stsp 		got_ref_close(ref_update->ref);
1207 13b2bc37 2022-10-23 stsp 		free(ref_update);
1208 13b2bc37 2022-10-23 stsp 	}
1209 13b2bc37 2022-10-23 stsp 	err = got_pack_close(&client->pack);
1210 13b2bc37 2022-10-23 stsp 	client_fd = client->fd;
1211 7fec5f4a 2022-10-28 stsp 	pack_pipe = client->pack_pipe;
1212 13b2bc37 2022-10-23 stsp 	idxfd = client->packidx_fd;
1213 13b2bc37 2022-10-23 stsp 	free(client);
1214 13b2bc37 2022-10-23 stsp 	if (client_fd != -1 && close(client_fd) == -1)
1215 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("close");
1216 7fec5f4a 2022-10-28 stsp 	if (pack_pipe != -1 && close(pack_pipe) == -1 && err == NULL)
1217 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("close");
1218 13b2bc37 2022-10-23 stsp 	if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
1219 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("close");
1220 13b2bc37 2022-10-23 stsp 	return err;
1221 13b2bc37 2022-10-23 stsp }
1222 13b2bc37 2022-10-23 stsp 
1223 13b2bc37 2022-10-23 stsp static const struct got_error *
1224 13b2bc37 2022-10-23 stsp receive_pack_pipe(struct repo_write_client **client, struct imsg *imsg,
1225 13b2bc37 2022-10-23 stsp     struct gotd_imsgev *iev)
1226 13b2bc37 2022-10-23 stsp {
1227 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_pipe ireq;
1228 13b2bc37 2022-10-23 stsp 	size_t datalen;
1229 13b2bc37 2022-10-23 stsp 
1230 13b2bc37 2022-10-23 stsp 	log_debug("receving pack pipe descriptor");
1231 13b2bc37 2022-10-23 stsp 
1232 13b2bc37 2022-10-23 stsp 	if (imsg->fd == -1)
1233 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
1234 13b2bc37 2022-10-23 stsp 
1235 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1236 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq))
1237 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1238 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, sizeof(ireq));
1239 13b2bc37 2022-10-23 stsp 
1240 13b2bc37 2022-10-23 stsp 	*client = find_client(ireq.client_id);
1241 13b2bc37 2022-10-23 stsp 	if (*client == NULL)
1242 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_CLIENT_ID);
1243 7fec5f4a 2022-10-28 stsp 	if ((*client)->pack_pipe != -1)
1244 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1245 13b2bc37 2022-10-23 stsp 
1246 7fec5f4a 2022-10-28 stsp 	(*client)->pack_pipe = imsg->fd;
1247 13b2bc37 2022-10-23 stsp 	return NULL;
1248 13b2bc37 2022-10-23 stsp }
1249 13b2bc37 2022-10-23 stsp 
1250 13b2bc37 2022-10-23 stsp static const struct got_error *
1251 13b2bc37 2022-10-23 stsp receive_pack_idx(struct repo_write_client **client, struct imsg *imsg,
1252 13b2bc37 2022-10-23 stsp     struct gotd_imsgev *iev)
1253 13b2bc37 2022-10-23 stsp {
1254 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packidx_file ireq;
1255 13b2bc37 2022-10-23 stsp 	size_t datalen;
1256 13b2bc37 2022-10-23 stsp 
1257 13b2bc37 2022-10-23 stsp 	log_debug("receving pack index output file");
1258 13b2bc37 2022-10-23 stsp 
1259 13b2bc37 2022-10-23 stsp 	if (imsg->fd == -1)
1260 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
1261 13b2bc37 2022-10-23 stsp 
1262 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1263 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq))
1264 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1265 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, sizeof(ireq));
1266 13b2bc37 2022-10-23 stsp 
1267 13b2bc37 2022-10-23 stsp 	*client = find_client(ireq.client_id);
1268 13b2bc37 2022-10-23 stsp 	if (*client == NULL)
1269 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_CLIENT_ID);
1270 13b2bc37 2022-10-23 stsp 	if ((*client)->packidx_fd != -1)
1271 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1272 13b2bc37 2022-10-23 stsp 
1273 13b2bc37 2022-10-23 stsp 	(*client)->packidx_fd = imsg->fd;
1274 13b2bc37 2022-10-23 stsp 	return NULL;
1275 13b2bc37 2022-10-23 stsp }
1276 13b2bc37 2022-10-23 stsp 
1277 13b2bc37 2022-10-23 stsp static void
1278 13b2bc37 2022-10-23 stsp repo_write_dispatch(int fd, short event, void *arg)
1279 13b2bc37 2022-10-23 stsp {
1280 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
1281 13b2bc37 2022-10-23 stsp 	struct gotd_imsgev *iev = arg;
1282 13b2bc37 2022-10-23 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
1283 13b2bc37 2022-10-23 stsp 	struct imsg imsg;
1284 13b2bc37 2022-10-23 stsp 	struct repo_write_client *client = NULL;
1285 13b2bc37 2022-10-23 stsp 	ssize_t n;
1286 13b2bc37 2022-10-23 stsp 	int shut = 0;
1287 13b2bc37 2022-10-23 stsp 
1288 13b2bc37 2022-10-23 stsp 	if (event & EV_READ) {
1289 13b2bc37 2022-10-23 stsp 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1290 13b2bc37 2022-10-23 stsp 			fatal("imsg_read error");
1291 13b2bc37 2022-10-23 stsp 		if (n == 0)	/* Connection closed. */
1292 13b2bc37 2022-10-23 stsp 			shut = 1;
1293 13b2bc37 2022-10-23 stsp 	}
1294 13b2bc37 2022-10-23 stsp 
1295 13b2bc37 2022-10-23 stsp 	if (event & EV_WRITE) {
1296 13b2bc37 2022-10-23 stsp 		n = msgbuf_write(&ibuf->w);
1297 13b2bc37 2022-10-23 stsp 		if (n == -1 && errno != EAGAIN)
1298 13b2bc37 2022-10-23 stsp 			fatal("msgbuf_write");
1299 13b2bc37 2022-10-23 stsp 		if (n == 0)	/* Connection closed. */
1300 13b2bc37 2022-10-23 stsp 			shut = 1;
1301 13b2bc37 2022-10-23 stsp 	}
1302 13b2bc37 2022-10-23 stsp 
1303 13b2bc37 2022-10-23 stsp 	for (;;) {
1304 13b2bc37 2022-10-23 stsp 		if ((n = imsg_get(ibuf, &imsg)) == -1)
1305 13b2bc37 2022-10-23 stsp 			fatal("%s: imsg_get error", __func__);
1306 13b2bc37 2022-10-23 stsp 		if (n == 0)	/* No more messages. */
1307 13b2bc37 2022-10-23 stsp 			break;
1308 13b2bc37 2022-10-23 stsp 
1309 13b2bc37 2022-10-23 stsp 		switch (imsg.hdr.type) {
1310 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_LIST_REFS_INTERNAL:
1311 13b2bc37 2022-10-23 stsp 			err = list_refs(&client, &imsg);
1312 13b2bc37 2022-10-23 stsp 			if (err)
1313 13b2bc37 2022-10-23 stsp 				log_warnx("%s: ls-refs: %s", repo_write.title,
1314 13b2bc37 2022-10-23 stsp 				    err->msg);
1315 13b2bc37 2022-10-23 stsp 			break;
1316 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_REF_UPDATE:
1317 13b2bc37 2022-10-23 stsp 			err = recv_ref_update(&client, &imsg);
1318 13b2bc37 2022-10-23 stsp 			if (err)
1319 13b2bc37 2022-10-23 stsp 				log_warnx("%s: ref-update: %s",
1320 13b2bc37 2022-10-23 stsp 				    repo_write.title, err->msg);
1321 13b2bc37 2022-10-23 stsp 			break;
1322 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_PACKFILE_PIPE:
1323 13b2bc37 2022-10-23 stsp 			err = receive_pack_pipe(&client, &imsg, iev);
1324 13b2bc37 2022-10-23 stsp 			if (err) {
1325 13b2bc37 2022-10-23 stsp 				log_warnx("%s: receiving pack pipe: %s",
1326 13b2bc37 2022-10-23 stsp 				    repo_write.title, err->msg);
1327 13b2bc37 2022-10-23 stsp 				break;
1328 13b2bc37 2022-10-23 stsp 			}
1329 13b2bc37 2022-10-23 stsp 			break;
1330 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_PACKIDX_FILE:
1331 13b2bc37 2022-10-23 stsp 			err = receive_pack_idx(&client, &imsg, iev);
1332 13b2bc37 2022-10-23 stsp 			if (err) {
1333 13b2bc37 2022-10-23 stsp 				log_warnx("%s: receiving pack index: %s",
1334 13b2bc37 2022-10-23 stsp 				    repo_write.title, err->msg);
1335 13b2bc37 2022-10-23 stsp 				break;
1336 13b2bc37 2022-10-23 stsp 			}
1337 13b2bc37 2022-10-23 stsp 			break;
1338 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_RECV_PACKFILE:
1339 13b2bc37 2022-10-23 stsp 			err = recv_packfile(&client, &imsg);
1340 13b2bc37 2022-10-23 stsp 			if (err) {
1341 13b2bc37 2022-10-23 stsp 				log_warnx("%s: receive packfile: %s",
1342 13b2bc37 2022-10-23 stsp 				    repo_write.title, err->msg);
1343 13b2bc37 2022-10-23 stsp 				break;
1344 13b2bc37 2022-10-23 stsp 			}
1345 13b2bc37 2022-10-23 stsp 			err = verify_packfile(client);
1346 13b2bc37 2022-10-23 stsp 			if (err) {
1347 13b2bc37 2022-10-23 stsp 				log_warnx("%s: verify packfile: %s",
1348 13b2bc37 2022-10-23 stsp 				    repo_write.title, err->msg);
1349 13b2bc37 2022-10-23 stsp 				break;
1350 13b2bc37 2022-10-23 stsp 			}
1351 13b2bc37 2022-10-23 stsp 			err = install_packfile(client, iev);
1352 13b2bc37 2022-10-23 stsp 			if (err) {
1353 13b2bc37 2022-10-23 stsp 				log_warnx("%s: install packfile: %s",
1354 13b2bc37 2022-10-23 stsp 				    repo_write.title, err->msg);
1355 13b2bc37 2022-10-23 stsp 				break;
1356 13b2bc37 2022-10-23 stsp 			}
1357 13b2bc37 2022-10-23 stsp 			err = update_refs(client, iev);
1358 13b2bc37 2022-10-23 stsp 			if (err) {
1359 13b2bc37 2022-10-23 stsp 				log_warnx("%s: update refs: %s",
1360 13b2bc37 2022-10-23 stsp 				    repo_write.title, err->msg);
1361 13b2bc37 2022-10-23 stsp 			}
1362 13b2bc37 2022-10-23 stsp 			break;
1363 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_DISCONNECT:
1364 13b2bc37 2022-10-23 stsp 			err = recv_disconnect(&imsg);
1365 13b2bc37 2022-10-23 stsp 			if (err)
1366 13b2bc37 2022-10-23 stsp 				log_warnx("%s: disconnect: %s",
1367 13b2bc37 2022-10-23 stsp 				    repo_write.title, err->msg);
1368 13b2bc37 2022-10-23 stsp 			break;
1369 13b2bc37 2022-10-23 stsp 		default:
1370 13b2bc37 2022-10-23 stsp 			log_debug("%s: unexpected imsg %d", repo_write.title,
1371 13b2bc37 2022-10-23 stsp 			    imsg.hdr.type);
1372 13b2bc37 2022-10-23 stsp 			break;
1373 13b2bc37 2022-10-23 stsp 		}
1374 13b2bc37 2022-10-23 stsp 
1375 13b2bc37 2022-10-23 stsp 		imsg_free(&imsg);
1376 13b2bc37 2022-10-23 stsp 	}
1377 13b2bc37 2022-10-23 stsp 
1378 13b2bc37 2022-10-23 stsp 	if (!shut && check_cancelled(NULL) == NULL) {
1379 13b2bc37 2022-10-23 stsp 		if (err &&
1380 13b2bc37 2022-10-23 stsp 		    gotd_imsg_send_error_event(iev, PROC_REPO_WRITE,
1381 13b2bc37 2022-10-23 stsp 		        client ? client->id : 0, err) == -1) {
1382 13b2bc37 2022-10-23 stsp 			log_warnx("could not send error to parent: %s",
1383 13b2bc37 2022-10-23 stsp 			    err->msg);
1384 13b2bc37 2022-10-23 stsp 		}
1385 13b2bc37 2022-10-23 stsp 		gotd_imsg_event_add(iev);
1386 13b2bc37 2022-10-23 stsp 	} else {
1387 13b2bc37 2022-10-23 stsp 		/* This pipe is dead. Remove its event handler */
1388 13b2bc37 2022-10-23 stsp 		event_del(&iev->ev);
1389 13b2bc37 2022-10-23 stsp 		event_loopexit(NULL);
1390 13b2bc37 2022-10-23 stsp 	}
1391 13b2bc37 2022-10-23 stsp }
1392 13b2bc37 2022-10-23 stsp 
1393 13b2bc37 2022-10-23 stsp void
1394 13b2bc37 2022-10-23 stsp repo_write_main(const char *title, int *pack_fds, int *temp_fds)
1395 13b2bc37 2022-10-23 stsp {
1396 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
1397 13b2bc37 2022-10-23 stsp 	struct gotd_imsgev iev;
1398 13b2bc37 2022-10-23 stsp 
1399 13b2bc37 2022-10-23 stsp 	repo_write.title = title;
1400 13b2bc37 2022-10-23 stsp 	repo_write.pid = getpid();
1401 13b2bc37 2022-10-23 stsp 	repo_write.pack_fds = pack_fds;
1402 13b2bc37 2022-10-23 stsp 	repo_write.temp_fds = temp_fds;
1403 13b2bc37 2022-10-23 stsp 
1404 13b2bc37 2022-10-23 stsp 	arc4random_buf(&clients_hash_key, sizeof(clients_hash_key));
1405 13b2bc37 2022-10-23 stsp 
1406 13b2bc37 2022-10-23 stsp 	/*
1407 13b2bc37 2022-10-23 stsp 	 * Open a repository in the root directory.
1408 13b2bc37 2022-10-23 stsp 	 * We are already in chroot at this point.
1409 13b2bc37 2022-10-23 stsp 	 */
1410 13b2bc37 2022-10-23 stsp 	err = got_repo_open(&repo_write.repo, "/", NULL, pack_fds);
1411 13b2bc37 2022-10-23 stsp 	if (err)
1412 13b2bc37 2022-10-23 stsp 		goto done;
1413 13b2bc37 2022-10-23 stsp 	if (!got_repo_is_bare(repo_write.repo)) {
1414 13b2bc37 2022-10-23 stsp 		err = got_error_msg(GOT_ERR_NOT_GIT_REPO,
1415 13b2bc37 2022-10-23 stsp 		    "bare git repository required");
1416 13b2bc37 2022-10-23 stsp 		goto done;
1417 13b2bc37 2022-10-23 stsp 	}
1418 13b2bc37 2022-10-23 stsp 
1419 13b2bc37 2022-10-23 stsp 	got_repo_temp_fds_set(repo_write.repo, temp_fds);
1420 13b2bc37 2022-10-23 stsp 
1421 13b2bc37 2022-10-23 stsp 	signal(SIGINT, catch_sigint);
1422 13b2bc37 2022-10-23 stsp 	signal(SIGTERM, catch_sigterm);
1423 13b2bc37 2022-10-23 stsp 	signal(SIGPIPE, SIG_IGN);
1424 13b2bc37 2022-10-23 stsp 	signal(SIGHUP, SIG_IGN);
1425 13b2bc37 2022-10-23 stsp 
1426 13b2bc37 2022-10-23 stsp 	imsg_init(&iev.ibuf, GOTD_SOCK_FILENO);
1427 13b2bc37 2022-10-23 stsp 	iev.handler = repo_write_dispatch;
1428 13b2bc37 2022-10-23 stsp 	iev.events = EV_READ;
1429 13b2bc37 2022-10-23 stsp 	iev.handler_arg = NULL;
1430 13b2bc37 2022-10-23 stsp 	event_set(&iev.ev, iev.ibuf.fd, EV_READ, repo_write_dispatch, &iev);
1431 13b2bc37 2022-10-23 stsp 	if (event_add(&iev.ev, NULL) == -1) {
1432 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("event_add");
1433 13b2bc37 2022-10-23 stsp 		goto done;
1434 13b2bc37 2022-10-23 stsp 	}
1435 13b2bc37 2022-10-23 stsp 
1436 13b2bc37 2022-10-23 stsp 	event_dispatch();
1437 13b2bc37 2022-10-23 stsp done:
1438 13b2bc37 2022-10-23 stsp 	if (err)
1439 13b2bc37 2022-10-23 stsp 		log_warnx("%s: %s", title, err->msg);
1440 13b2bc37 2022-10-23 stsp 	repo_write_shutdown();
1441 13b2bc37 2022-10-23 stsp }
1442 13b2bc37 2022-10-23 stsp 
1443 13b2bc37 2022-10-23 stsp void
1444 13b2bc37 2022-10-23 stsp repo_write_shutdown(void)
1445 13b2bc37 2022-10-23 stsp {
1446 13b2bc37 2022-10-23 stsp 	log_debug("%s: shutting down", repo_write.title);
1447 13b2bc37 2022-10-23 stsp 	if (repo_write.repo)
1448 13b2bc37 2022-10-23 stsp 		got_repo_close(repo_write.repo);
1449 13b2bc37 2022-10-23 stsp 	got_repo_pack_fds_close(repo_write.pack_fds);
1450 8193d041 2022-10-30 stsp 	got_repo_temp_fds_close(repo_write.temp_fds);
1451 13b2bc37 2022-10-23 stsp 	exit(0);
1452 13b2bc37 2022-10-23 stsp }