lib/send.c

   1 /*
   2  * Copyright (c) 2018, 2019 Ori Bernstein <ori@openbsd.org>
   3  * Copyright (c) 2021 Stefan Sperling <stsp@openbsd.org>
   4  * Copyright (c) 2023 Josh Rickmar <jrick@zettaport.com>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include "got_compat.h"
  20
  21 #include <sys/types.h>
  22 #include <sys/stat.h>
  23 #include <sys/queue.h>
  24 #include <sys/uio.h>
  25 #include <sys/socket.h>
  26 #include <sys/wait.h>
  27 #include <sys/resource.h>
  28 #include <sys/socket.h>
  29
  30 #include <errno.h>
  31 #include <err.h>
  32 #include <fcntl.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <stdint.h>
  37 #include <unistd.h>
  38 #include <zlib.h>
  39 #include <ctype.h>
  40 #include <limits.h>
  41 #include <time.h>
  42
  43 #include "got_error.h"
  44 #include "got_reference.h"
  45 #include "got_repository.h"
  46 #include "got_path.h"
  47 #include "got_cancel.h"
  48 #include "got_worktree.h"
  49 #include "got_object.h"
  50 #include "got_opentemp.h"
  51 #include "got_send.h"
  52 #include "got_repository_admin.h"
  53 #include "got_commit_graph.h"
  54
  55 #include "got_lib_delta.h"
  56 #include "got_lib_hash.h"
  57 #include "got_lib_inflate.h"
  58 #include "got_lib_object.h"
  59 #include "got_lib_object_parse.h"
  60 #include "got_lib_object_create.h"
  61 #include "got_lib_pack.h"
  62 #include "got_lib_privsep.h"
  63 #include "got_lib_object_cache.h"
  64 #include "got_lib_repository.h"
  65 #include "got_lib_ratelimit.h"
  66 #include "got_lib_pack_create.h"
  67 #include "got_lib_dial.h"
  68 #include "got_lib_worktree_cvg.h"
  69 #include "got_lib_poll.h"
  70
  71 #ifndef nitems
  72 #define nitems(_a)      (sizeof((_a)) / sizeof((_a)[0]))
  73 #endif
  74
  75 #ifndef ssizeof
  76 #define ssizeof(_x) ((ssize_t)(sizeof(_x)))
  77 #endif
  78
  79 #ifndef MIN
  80 #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
  81 #endif
  82
  83 const struct got_error *
  84 got_send_connect(pid_t *sendpid, int *sendfd, const char *proto,
  85     const char *host, const char *port, const char *server_path, int verbosity)
  86 {
  87         const struct got_error *err = NULL;
  88
  89         *sendpid = -1;
  90         *sendfd = -1;
  91
  92         if (strcmp(proto, "ssh") == 0 || strcmp(proto, "git+ssh") == 0)
  93                 err = got_dial_ssh(sendpid, sendfd, host, port, server_path,
  94                     GOT_DIAL_CMD_SEND, verbosity);
  95         else if (strcmp(proto, "git") == 0)
  96                 err = got_dial_git(sendfd, host, port, server_path,
  97                     GOT_DIAL_CMD_SEND);
  98         else if (strcmp(proto, "http") == 0 || strcmp(proto, "git+http") == 0)
  99                 err = got_error_path(proto, GOT_ERR_NOT_IMPL);
 100         else
 101                 err = got_error_path(proto, GOT_ERR_BAD_PROTO);
 102         return err;
 103 }
 104
 105 struct pack_progress_arg {
 106     got_send_progress_cb progress_cb;
 107     void *progress_arg;
 108     int sendfd;
 109
 110     int ncolored;
 111     int nfound;
 112     int ntrees;
 113     off_t packfile_size;
 114     int ncommits;
 115     int nobj_total;
 116     int nobj_deltify;
 117     int nobj_written;
 118 };
 119
 120 static const struct got_error *
 121 pack_progress(void *arg, int ncolored, int nfound, int ntrees,
 122     off_t packfile_size, int ncommits, int nobj_total, int nobj_deltify,
 123     int nobj_written)
 124 {
 125         const struct got_error *err;
 126         struct pack_progress_arg *a = arg;
 127
 128         err = a->progress_cb(a->progress_arg, ncolored, nfound, ntrees,
 129             packfile_size, ncommits, nobj_total, nobj_deltify,
 130             nobj_written, 0, NULL, NULL, 0);
 131         if (err)
 132                 return err;
 133
 134         /*
 135          * Detect the server closing our connection while we are
 136          * busy creating a pack file.
 137          *
 138          * XXX This should be a temporary workaround. A better fix would
 139          * be to avoid use of an on-disk tempfile for pack file data.
 140          * Instead we could stream pack file data to got-send-pack while
 141          * the pack file is being generated. Write errors in got-send-pack
 142          * would then automatically abort the creation of pack file data.
 143          */
 144         err = got_poll_fd(a->sendfd, 0, 0);
 145         if (err && err->code != GOT_ERR_TIMEOUT) {
 146                 if (err->code == GOT_ERR_EOF) {
 147                         err = got_error_msg(GOT_ERR_EOF,
 148                             "server unexpectedly closed the connection");
 149                 }
 150                 return err;
 151         }
 152
 153         a->ncolored= ncolored;
 154         a->nfound = nfound;
 155         a->ntrees = ntrees;
 156         a->packfile_size = packfile_size;
 157         a->ncommits = ncommits;
 158         a->nobj_total = nobj_total;
 159         a->nobj_deltify = nobj_deltify;
 160         a->nobj_written = nobj_written;
 161         return NULL;
 162 }
 163
 164 static const struct got_error *
 165 insert_sendable_ref(struct got_pathlist_head *refs, const char *refname,
 166     const char *target_refname, struct got_repository *repo)
 167 {
 168         const struct got_error *err;
 169         struct got_reference *ref;
 170         struct got_object_id *id = NULL;
 171         int obj_type;
 172
 173         err = got_ref_open(&ref, repo, refname, 0);
 174         if (err)
 175                 return err;
 176
 177         if (got_ref_is_symbolic(ref)) {
 178                 err = got_error_fmt(GOT_ERR_BAD_REF_TYPE,
 179                     "cannot send symbolic reference %s", refname);
 180                 goto done;
 181         }
 182
 183         err = got_ref_resolve(&id, repo, ref);
 184         if (err)
 185                 goto done;
 186         err = got_object_get_type(&obj_type, repo, id);
 187         if (err)
 188                 goto done;
 189         switch (obj_type) {
 190         case GOT_OBJ_TYPE_COMMIT:
 191         case GOT_OBJ_TYPE_TAG:
 192                 break;
 193         default:
 194                 err = got_error_fmt(GOT_ERR_OBJ_TYPE," cannot send %s",
 195                     refname);
 196                 goto done;
 197         }
 198
 199         err = got_pathlist_insert(NULL, refs, target_refname, id);
 200 done:
 201         if (ref)
 202                 got_ref_close(ref);
 203         if (err)
 204                 free(id);
 205         return err;
 206 }
 207
 208 static const struct got_error *
 209 check_common_ancestry(const char *refname, struct got_object_id *my_id,
 210     struct got_object_id *their_id, struct got_repository *repo,
 211     got_cancel_cb cancel_cb, void *cancel_arg)
 212 {
 213         const struct got_error *err = NULL;
 214         struct got_object_id *yca_id;
 215         int obj_type;
 216
 217         err = got_object_get_type(&obj_type, repo, their_id);
 218         if (err)
 219                 return err;
 220         if (obj_type != GOT_OBJ_TYPE_COMMIT)
 221                 return got_error_fmt(GOT_ERR_OBJ_TYPE,
 222                     "bad object type on server for %s", refname);
 223
 224         err = got_commit_graph_find_youngest_common_ancestor(&yca_id,
 225             my_id, their_id, 0, 1, repo, cancel_cb, cancel_arg);
 226         if (err)
 227                 return err;
 228         if (yca_id == NULL)
 229                 return got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
 230
 231         if (got_object_id_cmp(their_id, yca_id) != 0)
 232                 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
 233
 234         free(yca_id);
 235         return err;
 236 }
 237
 238 static const struct got_error *
 239 realloc_ids(struct got_object_id ***ids, size_t *nalloc, size_t n)
 240 {
 241         struct got_object_id **new;
 242         const size_t alloc_chunksz = 256;
 243
 244         if (*nalloc >= n)
 245                 return NULL;
 246
 247         new = recallocarray(*ids, *nalloc, *nalloc + alloc_chunksz,
 248             sizeof(struct got_object_id));
 249         if (new == NULL)
 250                 return got_error_from_errno("recallocarray");
 251
 252         *ids = new;
 253         *nalloc += alloc_chunksz;
 254         return NULL;
 255 }
 256
 257 static struct got_pathlist_entry *
 258 find_ref(struct got_pathlist_head *refs, const char *refname)
 259 {
 260         struct got_pathlist_entry *pe;
 261
 262         TAILQ_FOREACH(pe, refs, entry) {
 263                 if (got_path_cmp(pe->path, refname, strlen(pe->path),
 264                     strlen(refname)) == 0) {
 265                         return pe;
 266                 }
 267         }
 268
 269         return NULL;
 270 }
 271
 272 static const struct got_error *
 273 get_remote_refname(char **remote_refname, const char *remote_name,
 274     const char *refname)
 275 {
 276         if (strncmp(refname, "refs/", 5) == 0)
 277                 refname += 5;
 278         if (strncmp(refname, "heads/", 6) == 0)
 279                 refname += 6;
 280
 281         if (asprintf(remote_refname, "refs/remotes/%s/%s",
 282             remote_name, refname) == -1)
 283                 return got_error_from_errno("asprintf");
 284
 285         return NULL;
 286 }
 287
 288 static const struct got_error *
 289 update_remote_ref(struct got_pathlist_entry *my_ref, const char *remote_name,
 290     struct got_repository *repo)
 291 {
 292         const struct got_error *err, *unlock_err;
 293         const char *refname = my_ref->path;
 294         struct got_object_id *my_id = my_ref->data;
 295         struct got_reference *ref = NULL;
 296         char *remote_refname = NULL;
 297         int ref_locked = 0;
 298
 299         err = get_remote_refname(&remote_refname, remote_name, refname);
 300         if (err)
 301                 goto done;
 302
 303         err = got_ref_open(&ref, repo, remote_refname, 1 /* lock */);
 304         if (err) {
 305                 if (err->code != GOT_ERR_NOT_REF)
 306                         goto done;
 307                 err = got_ref_alloc(&ref, remote_refname, my_id);
 308                 if (err)
 309                         goto done;
 310         } else {
 311                 ref_locked = 1;
 312                 err = got_ref_change_ref(ref, my_id);
 313                 if (err)
 314                         goto done;
 315         }
 316
 317         err = got_ref_write(ref, repo);
 318 done:
 319         if (ref) {
 320                 if (ref_locked) {
 321                         unlock_err = got_ref_unlock(ref);
 322                         if (unlock_err && err == NULL)
 323                                 err = unlock_err;
 324                 }
 325                 got_ref_close(ref);
 326         }
 327         free(remote_refname);
 328         return err;
 329 }
 330
 331 const struct got_error*
 332 got_send_pack(const char *remote_name, struct got_pathlist_head *branch_names,
 333     struct got_pathlist_head *tag_names,
 334     struct got_pathlist_head *delete_branches,
 335     int verbosity, int overwrite_refs, int sendfd,
 336     struct got_repository *repo, got_send_progress_cb progress_cb,
 337     void *progress_arg, got_cancel_cb cancel_cb, void *cancel_arg)
 338 {
 339         int imsg_sendfds[2] = { -1, -1 };
 340         int npackfd = -1, nsendfd = -1;
 341         int sendstatus, done = 0;
 342         const struct got_error *err;
 343         struct imsgbuf sendibuf;
 344         pid_t sendpid = -1;
 345         struct got_pathlist_head have_refs;
 346         struct got_pathlist_head their_refs;
 347         struct got_pathlist_entry *pe;
 348         struct got_object_id **our_ids = NULL;
 349         struct got_object_id **their_ids = NULL;
 350         int nours = 0, ntheirs = 0;
 351         size_t nalloc_ours = 0, nalloc_theirs = 0;
 352         int refs_to_send = 0, refs_to_delete = 0;
 353         off_t bytes_sent = 0, bytes_sent_cur = 0;
 354         struct pack_progress_arg ppa;
 355         struct got_object_id packhash;
 356         int packfd = -1;
 357         FILE *delta_cache = NULL;
 358         char *s = NULL;
 359
 360         TAILQ_INIT(&have_refs);
 361         TAILQ_INIT(&their_refs);
 362
 363         if (got_repo_get_object_format(repo) != GOT_HASH_SHA1)
 364                 return got_error_fmt(GOT_ERR_NOT_IMPL,
 365                     "sha256 object IDs unsupported in network protocol");
 366
 367         TAILQ_FOREACH(pe, branch_names, entry) {
 368                 const char *branchname = pe->path;
 369                 const char *targetname = pe->data;
 370
 371                 if (targetname == NULL)
 372                         targetname = branchname;
 373
 374                 if (strncmp(targetname, "refs/heads/", 11) != 0) {
 375                         if (asprintf(&s, "refs/heads/%s", targetname) == -1) {
 376                                 err = got_error_from_errno("asprintf");
 377                                 goto done;
 378                         }
 379                 } else {
 380                         if ((s = strdup(targetname)) == NULL) {
 381                                 err = got_error_from_errno("strdup");
 382                                 goto done;
 383                         }
 384                 }
 385                 err = insert_sendable_ref(&have_refs, branchname, s, repo);
 386                 if (err)
 387                         goto done;
 388                 s = NULL;
 389         }
 390
 391         TAILQ_FOREACH(pe, delete_branches, entry) {
 392                 const char *branchname = pe->path;
 393                 struct got_pathlist_entry *ref;
 394                 if (strncmp(branchname, "refs/heads/", 11) != 0) {
 395                         err = got_error_fmt(GOT_ERR_SEND_DELETE_REF, "%s",
 396                             branchname);
 397                         goto done;
 398                 }
 399                 ref = find_ref(&have_refs, branchname);
 400                 if (ref) {
 401                         err = got_error_fmt(GOT_ERR_SEND_DELETE_REF,
 402                             "changes on %s will be sent to server",
 403                             branchname);
 404                         goto done;
 405                 }
 406         }
 407
 408         TAILQ_FOREACH(pe, tag_names, entry) {
 409                 const char *tagname = pe->path;
 410                 if (strncmp(tagname, "refs/tags/", 10) != 0) {
 411                         if (asprintf(&s, "refs/tags/%s", tagname) == -1) {
 412                                 err = got_error_from_errno("asprintf");
 413                                 goto done;
 414                         }
 415                 } else {
 416                         if ((s = strdup(pe->path)) == NULL) {
 417                                 err = got_error_from_errno("strdup");
 418                                 goto done;
 419                         }
 420                 }
 421                 err = insert_sendable_ref(&have_refs, s, s, repo);
 422                 if (err)
 423                         goto done;
 424                 s = NULL;
 425         }
 426
 427         if (TAILQ_EMPTY(&have_refs) && TAILQ_EMPTY(delete_branches)) {
 428                 err = got_error(GOT_ERR_SEND_EMPTY);
 429                 goto done;
 430         }
 431
 432         packfd = got_opentempfd();
 433         if (packfd == -1) {
 434                 err = got_error_from_errno("got_opentempfd");
 435                 goto done;
 436         }
 437
 438         delta_cache = got_opentemp();
 439         if (delta_cache == NULL) {
 440                 err = got_error_from_errno("got_opentemp");
 441                 goto done;
 442         }
 443
 444         if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_sendfds) == -1) {
 445                 err = got_error_from_errno("socketpair");
 446                 goto done;
 447         }
 448
 449         sendpid = fork();
 450         if (sendpid == -1) {
 451                 err = got_error_from_errno("fork");
 452                 goto done;
 453         } else if (sendpid == 0) {
 454                 got_privsep_exec_child(imsg_sendfds,
 455                     GOT_PATH_PROG_SEND_PACK, got_repo_get_path(repo));
 456         }
 457
 458         if (close(imsg_sendfds[1]) == -1) {
 459                 err = got_error_from_errno("close");
 460                 goto done;
 461         }
 462         imsg_sendfds[1] = -1;
 463         imsg_init(&sendibuf, imsg_sendfds[0]);
 464         nsendfd = dup(sendfd);
 465         if (nsendfd == -1) {
 466                 err = got_error_from_errno("dup");
 467                 goto done;
 468         }
 469
 470         /*
 471          * Prepare the array of our object IDs which
 472          * will be needed for generating a pack file.
 473          */
 474         TAILQ_FOREACH(pe, &have_refs, entry) {
 475                 struct got_object_id *id = pe->data;
 476
 477                 err = realloc_ids(&our_ids, &nalloc_ours, nours + 1);
 478                 if (err)
 479                         goto done;
 480                 our_ids[nours] = id;
 481                 nours++;
 482         }
 483
 484         err = got_privsep_send_send_req(&sendibuf, nsendfd, &have_refs,
 485             delete_branches, verbosity);
 486         if (err)
 487                 goto done;
 488         nsendfd = -1;
 489
 490         err = got_privsep_recv_send_remote_refs(&their_refs, &sendibuf);
 491         if (err)
 492                 goto done;
 493         /*
 494          * Process references reported by the server.
 495          * Push appropriate object IDs onto the "their IDs" array.
 496          * This array will be used to exclude objects which already
 497          * exist on the server from our pack file.
 498          */
 499         TAILQ_FOREACH(pe, &their_refs, entry) {
 500                 const char *refname = pe->path;
 501                 struct got_object_id *their_id = pe->data;
 502                 int have_their_id;
 503                 struct got_object *obj;
 504                 struct got_pathlist_entry *my_ref = NULL;
 505                 int is_tag = 0;
 506
 507                 /* Don't blindly trust the server to send us valid names. */
 508                 if (!got_ref_name_is_valid(refname))
 509                         continue;
 510
 511                 if (strncmp(refname, "refs/tags/", 10) == 0)
 512                         is_tag = 1;
 513                 /*
 514                  * Find out whether this is a reference we want to upload.
 515                  * Otherwise we can still use this reference as a hint to
 516                  * avoid uploading any objects the server already has.
 517                  */
 518                 my_ref = find_ref(&have_refs, refname);
 519                 if (my_ref) {
 520                         struct got_object_id *my_id = my_ref->data;
 521                         if (got_object_id_cmp(my_id, their_id) != 0) {
 522                                 if (!overwrite_refs && is_tag) {
 523                                         err = got_error_fmt(
 524                                             GOT_ERR_SEND_TAG_EXISTS,
 525                                             "%s", refname);
 526                                         goto done;
 527                                 }
 528                                 refs_to_send++;
 529                         }
 530                 }
 531
 532                 /* Check if their object exists locally. */
 533                 err = got_object_open(&obj, repo, their_id);
 534                 if (err) {
 535                         if (err->code != GOT_ERR_NO_OBJ)
 536                                 goto done;
 537                         if (!overwrite_refs && my_ref != NULL) {
 538                                 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY,
 539                                     "%s", refname);
 540                                 goto done;
 541                         }
 542                         have_their_id = 0;
 543                 } else {
 544                         got_object_close(obj);
 545                         have_their_id = 1;
 546                 }
 547
 548                 err = realloc_ids(&their_ids, &nalloc_theirs, ntheirs + 1);
 549                 if (err)
 550                         goto done;
 551
 552                 if (have_their_id) {
 553                         /* Enforce linear ancestry if required. */
 554                         if (!overwrite_refs && my_ref && !is_tag) {
 555                                 struct got_object_id *my_id = my_ref->data;
 556                                 err = check_common_ancestry(refname, my_id,
 557                                     their_id, repo, cancel_cb, cancel_arg);
 558                                 if (err)
 559                                         goto done;
 560                         }
 561                         /* Exclude any objects reachable via their ID. */
 562                         their_ids[ntheirs] = their_id;
 563                         ntheirs++;
 564                 } else if (!is_tag) {
 565                         char *remote_refname;
 566                         struct got_reference *ref;
 567                         /*
 568                          * Exclude any objects which exist on the server
 569                          * according to a locally cached remote reference.
 570                          */
 571                         err = get_remote_refname(&remote_refname,
 572                             remote_name, refname);
 573                         if (err)
 574                                 goto done;
 575                         err = got_ref_open(&ref, repo, remote_refname, 0);
 576                         free(remote_refname);
 577                         if (err) {
 578                                 if (err->code != GOT_ERR_NOT_REF)
 579                                         goto done;
 580                         } else {
 581                                 err = got_ref_resolve(&their_ids[ntheirs],
 582                                     repo, ref);
 583                                 got_ref_close(ref);
 584                                 if (err)
 585                                         goto done;
 586                                 ntheirs++;
 587                         }
 588                 }
 589         }
 590
 591         /* Account for any new references we are going to upload. */
 592         TAILQ_FOREACH(pe, &have_refs, entry) {
 593                 const char *refname = pe->path;
 594                 if (find_ref(&their_refs, refname) == NULL)
 595                         refs_to_send++;
 596         }
 597
 598         /* Account for any existing references we are going to delete. */
 599         TAILQ_FOREACH(pe, delete_branches, entry) {
 600                 const char *branchname = pe->path;
 601                 if (find_ref(&their_refs, branchname))
 602                         refs_to_delete++;
 603         }
 604
 605         if (refs_to_send == 0 && refs_to_delete == 0) {
 606                 got_privsep_send_stop(imsg_sendfds[0]);
 607                 goto done;
 608         }
 609
 610         if (refs_to_send > 0) {
 611                 struct got_ratelimit rl;
 612                 got_ratelimit_init(&rl, 0, 500);
 613                 memset(&ppa, 0, sizeof(ppa));
 614                 ppa.progress_cb = progress_cb;
 615                 ppa.progress_arg = progress_arg;
 616                 ppa.sendfd = sendfd;
 617                 err = got_pack_create(&packhash, packfd, delta_cache,
 618                     their_ids, ntheirs, our_ids, nours, repo, 0, 1, 0,
 619                     pack_progress, &ppa, &rl, cancel_cb, cancel_arg);
 620                 if (err)
 621                         goto done;
 622
 623                 npackfd = dup(packfd);
 624                 if (npackfd == -1) {
 625                         err = got_error_from_errno("dup");
 626                         goto done;
 627                 }
 628                 err = got_privsep_send_packfd(&sendibuf, npackfd);
 629                 if (err != NULL)
 630                         goto done;
 631                 npackfd = -1;
 632         } else {
 633                 err = got_privsep_send_packfd(&sendibuf, -1);
 634                 if (err != NULL)
 635                         goto done;
 636         }
 637
 638         while (!done) {
 639                 int success = 0;
 640                 char *refname = NULL;
 641                 char *errmsg = NULL;
 642
 643                 if (cancel_cb) {
 644                         err = (*cancel_cb)(cancel_arg);
 645                         if (err)
 646                                 goto done;
 647                 }
 648                 err = got_privsep_recv_send_progress(&done, &bytes_sent,
 649                     &success, &refname, &errmsg, &sendibuf);
 650                 if (err)
 651                         goto done;
 652                 if (refname && got_ref_name_is_valid(refname) && success &&
 653                     strncmp(refname, "refs/tags/", 10) != 0) {
 654                         struct got_pathlist_entry *my_ref;
 655                         /*
 656                          * The server has accepted our changes.
 657                          * Update our reference in refs/remotes/ accordingly.
 658                          */
 659                         my_ref = find_ref(&have_refs, refname);
 660                         if (my_ref) {
 661                                 err = update_remote_ref(my_ref, remote_name,
 662                                     repo);
 663                                 if (err)
 664                                         goto done;
 665                         }
 666                 }
 667                 if (refname != NULL ||
 668                     bytes_sent_cur != bytes_sent) {
 669                         err = progress_cb(progress_arg, ppa.ncolored,
 670                             ppa.nfound, ppa.ntrees, ppa.packfile_size,
 671                             ppa.ncommits, ppa.nobj_total, ppa.nobj_deltify,
 672                             ppa.nobj_written, bytes_sent,
 673                             refname, errmsg, success);
 674                         if (err) {
 675                                 free(refname);
 676                                 free(errmsg);
 677                                 goto done;
 678                         }
 679                         bytes_sent_cur = bytes_sent;
 680                 }
 681                 free(refname);
 682                 free(errmsg);
 683         }
 684 done:
 685         if (sendpid != -1) {
 686                 if (err)
 687                         got_privsep_send_stop(imsg_sendfds[0]);
 688                 if (waitpid(sendpid, &sendstatus, 0) == -1 && err == NULL)
 689                         err = got_error_from_errno("waitpid");
 690         }
 691         if (imsg_sendfds[0] != -1 && close(imsg_sendfds[0]) == -1 && err == NULL)
 692                 err = got_error_from_errno("close");
 693         if (imsg_sendfds[1] != -1 && close(imsg_sendfds[1]) == -1 && err == NULL)
 694                 err = got_error_from_errno("close");
 695         if (packfd != -1 && close(packfd) == -1 && err == NULL)
 696                 err = got_error_from_errno("close");
 697         if (delta_cache && fclose(delta_cache) == EOF && err == NULL)
 698                 err = got_error_from_errno("fclose");
 699         if (nsendfd != -1 && close(nsendfd) == -1 && err == NULL)
 700                 err = got_error_from_errno("close");
 701         if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
 702                 err = got_error_from_errno("close");
 703
 704         got_pathlist_free(&have_refs, GOT_PATHLIST_FREE_ALL);
 705         got_pathlist_free(&their_refs, GOT_PATHLIST_FREE_ALL);
 706         /*
 707          * Object ids are owned by have_refs/their_refs and are already freed;
 708          * Only the arrays must be freed.
 709          */
 710         free(our_ids);
 711         free(their_ids);
 712         free(s);
 713         return err;
 714 }