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         struct got_pathlist_entry *new = NULL;
 172         int obj_type;
 173
 174         err = got_ref_open(&ref, repo, refname, 0);
 175         if (err)
 176                 return err;
 177
 178         if (got_ref_is_symbolic(ref)) {
 179                 err = got_error_fmt(GOT_ERR_BAD_REF_TYPE,
 180                     "cannot send symbolic reference %s", refname);
 181                 goto done;
 182         }
 183
 184         err = got_ref_resolve(&id, repo, ref);
 185         if (err)
 186                 goto done;
 187         err = got_object_get_type(&obj_type, repo, id);
 188         if (err)
 189                 goto done;
 190         switch (obj_type) {
 191         case GOT_OBJ_TYPE_COMMIT:
 192         case GOT_OBJ_TYPE_TAG:
 193                 break;
 194         default:
 195                 err = got_error_fmt(GOT_ERR_OBJ_TYPE," cannot send %s",
 196                     refname);
 197                 goto done;
 198         }
 199
 200         err = got_pathlist_insert(&new, refs, target_refname, id);
 201 done:
 202         if (ref)
 203                 got_ref_close(ref);
 204         if (err || new == NULL /* duplicate */)
 205                 free(id);
 206         return err;
 207 }
 208
 209 static const struct got_error *
 210 check_common_ancestry(const char *refname, struct got_object_id *my_id,
 211     struct got_object_id *their_id, struct got_repository *repo,
 212     got_cancel_cb cancel_cb, void *cancel_arg)
 213 {
 214         const struct got_error *err = NULL;
 215         struct got_object_id *yca_id;
 216         int obj_type;
 217
 218         err = got_object_get_type(&obj_type, repo, their_id);
 219         if (err)
 220                 return err;
 221         if (obj_type != GOT_OBJ_TYPE_COMMIT)
 222                 return got_error_fmt(GOT_ERR_OBJ_TYPE,
 223                     "bad object type on server for %s", refname);
 224
 225         err = got_commit_graph_find_youngest_common_ancestor(&yca_id,
 226             my_id, their_id, 0, 1, repo, cancel_cb, cancel_arg);
 227         if (err)
 228                 return err;
 229         if (yca_id == NULL)
 230                 return got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
 231
 232         if (got_object_id_cmp(their_id, yca_id) != 0)
 233                 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
 234
 235         free(yca_id);
 236         return err;
 237 }
 238
 239 static const struct got_error *
 240 realloc_ids(struct got_object_id ***ids, size_t *nalloc, size_t n)
 241 {
 242         struct got_object_id **new;
 243         const size_t alloc_chunksz = 256;
 244
 245         if (*nalloc >= n)
 246                 return NULL;
 247
 248         new = recallocarray(*ids, *nalloc, *nalloc + alloc_chunksz,
 249             sizeof(struct got_object_id));
 250         if (new == NULL)
 251                 return got_error_from_errno("recallocarray");
 252
 253         *ids = new;
 254         *nalloc += alloc_chunksz;
 255         return NULL;
 256 }
 257
 258 static struct got_pathlist_entry *
 259 find_ref(struct got_pathlist_head *refs, const char *refname)
 260 {
 261         struct got_pathlist_entry *pe;
 262
 263         TAILQ_FOREACH(pe, refs, entry) {
 264                 if (got_path_cmp(pe->path, refname, strlen(pe->path),
 265                     strlen(refname)) == 0) {
 266                         return pe;
 267                 }
 268         }
 269
 270         return NULL;
 271 }
 272
 273 static const struct got_error *
 274 get_remote_refname(char **remote_refname, const char *remote_name,
 275     const char *refname)
 276 {
 277         if (strncmp(refname, "refs/", 5) == 0)
 278                 refname += 5;
 279         if (strncmp(refname, "heads/", 6) == 0)
 280                 refname += 6;
 281
 282         if (asprintf(remote_refname, "refs/remotes/%s/%s",
 283             remote_name, refname) == -1)
 284                 return got_error_from_errno("asprintf");
 285
 286         return NULL;
 287 }
 288
 289 static const struct got_error *
 290 update_remote_ref(struct got_pathlist_entry *my_ref, const char *remote_name,
 291     struct got_repository *repo)
 292 {
 293         const struct got_error *err, *unlock_err;
 294         const char *refname = my_ref->path;
 295         struct got_object_id *my_id = my_ref->data;
 296         struct got_reference *ref = NULL;
 297         char *remote_refname = NULL;
 298         int ref_locked = 0;
 299
 300         err = get_remote_refname(&remote_refname, remote_name, refname);
 301         if (err)
 302                 goto done;
 303
 304         err = got_ref_open(&ref, repo, remote_refname, 1 /* lock */);
 305         if (err) {
 306                 if (err->code != GOT_ERR_NOT_REF)
 307                         goto done;
 308                 err = got_ref_alloc(&ref, remote_refname, my_id);
 309                 if (err)
 310                         goto done;
 311         } else {
 312                 ref_locked = 1;
 313                 err = got_ref_change_ref(ref, my_id);
 314                 if (err)
 315                         goto done;
 316         }
 317
 318         err = got_ref_write(ref, repo);
 319 done:
 320         if (ref) {
 321                 if (ref_locked) {
 322                         unlock_err = got_ref_unlock(ref);
 323                         if (unlock_err && err == NULL)
 324                                 err = unlock_err;
 325                 }
 326                 got_ref_close(ref);
 327         }
 328         free(remote_refname);
 329         return err;
 330 }
 331
 332 const struct got_error*
 333 got_send_pack(const char *remote_name, struct got_pathlist_head *branch_names,
 334     struct got_pathlist_head *tag_names,
 335     struct got_pathlist_head *delete_branches,
 336     int verbosity, int overwrite_refs, int sendfd,
 337     struct got_repository *repo, got_send_progress_cb progress_cb,
 338     void *progress_arg, got_cancel_cb cancel_cb, void *cancel_arg)
 339 {
 340         int imsg_sendfds[2] = { -1, -1 };
 341         int npackfd = -1, nsendfd = -1;
 342         int sendstatus, done = 0;
 343         const struct got_error *err;
 344         struct imsgbuf sendibuf;
 345         pid_t sendpid = -1;
 346         struct got_pathlist_head have_refs;
 347         struct got_pathlist_head their_refs;
 348         struct got_pathlist_entry *pe;
 349         struct got_object_id **our_ids = NULL;
 350         struct got_object_id **their_ids = NULL;
 351         int nours = 0, ntheirs = 0;
 352         size_t nalloc_ours = 0, nalloc_theirs = 0;
 353         int refs_to_send = 0, refs_to_delete = 0;
 354         off_t bytes_sent = 0, bytes_sent_cur = 0;
 355         struct pack_progress_arg ppa;
 356         struct got_object_id packhash;
 357         int packfd = -1;
 358         FILE *delta_cache = NULL;
 359         char *s = NULL;
 360
 361         TAILQ_INIT(&have_refs);
 362         TAILQ_INIT(&their_refs);
 363
 364         if (got_repo_get_object_format(repo) != GOT_HASH_SHA1)
 365                 return got_error_fmt(GOT_ERR_NOT_IMPL,
 366                     "sha256 object IDs unsupported in network protocol");
 367
 368         TAILQ_FOREACH(pe, branch_names, entry) {
 369                 const char *branchname = pe->path;
 370                 const char *targetname = pe->data;
 371
 372                 if (targetname == NULL)
 373                         targetname = branchname;
 374
 375                 if (strncmp(targetname, "refs/heads/", 11) != 0) {
 376                         if (asprintf(&s, "refs/heads/%s", targetname) == -1) {
 377                                 err = got_error_from_errno("asprintf");
 378                                 goto done;
 379                         }
 380                 } else {
 381                         if ((s = strdup(targetname)) == NULL) {
 382                                 err = got_error_from_errno("strdup");
 383                                 goto done;
 384                         }
 385                 }
 386                 err = insert_sendable_ref(&have_refs, branchname, s, repo);
 387                 if (err)
 388                         goto done;
 389                 s = NULL;
 390         }
 391
 392         TAILQ_FOREACH(pe, delete_branches, entry) {
 393                 const char *branchname = pe->path;
 394                 struct got_pathlist_entry *ref;
 395                 if (strncmp(branchname, "refs/heads/", 11) != 0) {
 396                         err = got_error_fmt(GOT_ERR_SEND_DELETE_REF, "%s",
 397                             branchname);
 398                         goto done;
 399                 }
 400                 ref = find_ref(&have_refs, branchname);
 401                 if (ref) {
 402                         err = got_error_fmt(GOT_ERR_SEND_DELETE_REF,
 403                             "changes on %s will be sent to server",
 404                             branchname);
 405                         goto done;
 406                 }
 407         }
 408
 409         TAILQ_FOREACH(pe, tag_names, entry) {
 410                 const char *tagname = pe->path;
 411                 if (strncmp(tagname, "refs/tags/", 10) != 0) {
 412                         if (asprintf(&s, "refs/tags/%s", tagname) == -1) {
 413                                 err = got_error_from_errno("asprintf");
 414                                 goto done;
 415                         }
 416                 } else {
 417                         if ((s = strdup(pe->path)) == NULL) {
 418                                 err = got_error_from_errno("strdup");
 419                                 goto done;
 420                         }
 421                 }
 422                 err = insert_sendable_ref(&have_refs, s, s, repo);
 423                 if (err)
 424                         goto done;
 425                 s = NULL;
 426         }
 427
 428         if (TAILQ_EMPTY(&have_refs) && TAILQ_EMPTY(delete_branches)) {
 429                 err = got_error(GOT_ERR_SEND_EMPTY);
 430                 goto done;
 431         }
 432
 433         packfd = got_opentempfd();
 434         if (packfd == -1) {
 435                 err = got_error_from_errno("got_opentempfd");
 436                 goto done;
 437         }
 438
 439         delta_cache = got_opentemp();
 440         if (delta_cache == NULL) {
 441                 err = got_error_from_errno("got_opentemp");
 442                 goto done;
 443         }
 444
 445         if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_sendfds) == -1) {
 446                 err = got_error_from_errno("socketpair");
 447                 goto done;
 448         }
 449
 450         sendpid = fork();
 451         if (sendpid == -1) {
 452                 err = got_error_from_errno("fork");
 453                 goto done;
 454         } else if (sendpid == 0) {
 455                 got_privsep_exec_child(imsg_sendfds,
 456                     GOT_PATH_PROG_SEND_PACK, got_repo_get_path(repo));
 457         }
 458
 459         if (close(imsg_sendfds[1]) == -1) {
 460                 err = got_error_from_errno("close");
 461                 goto done;
 462         }
 463         imsg_sendfds[1] = -1;
 464         imsg_init(&sendibuf, imsg_sendfds[0]);
 465         nsendfd = dup(sendfd);
 466         if (nsendfd == -1) {
 467                 err = got_error_from_errno("dup");
 468                 goto done;
 469         }
 470
 471         /*
 472          * Prepare the array of our object IDs which
 473          * will be needed for generating a pack file.
 474          */
 475         TAILQ_FOREACH(pe, &have_refs, entry) {
 476                 struct got_object_id *id = pe->data;
 477
 478                 err = realloc_ids(&our_ids, &nalloc_ours, nours + 1);
 479                 if (err)
 480                         goto done;
 481                 our_ids[nours] = id;
 482                 nours++;
 483         }
 484
 485         err = got_privsep_send_send_req(&sendibuf, nsendfd, &have_refs,
 486             delete_branches, verbosity);
 487         if (err)
 488                 goto done;
 489         nsendfd = -1;
 490
 491         err = got_privsep_recv_send_remote_refs(&their_refs, &sendibuf);
 492         if (err)
 493                 goto done;
 494         /*
 495          * Process references reported by the server.
 496          * Push appropriate object IDs onto the "their IDs" array.
 497          * This array will be used to exclude objects which already
 498          * exist on the server from our pack file.
 499          */
 500         TAILQ_FOREACH(pe, &their_refs, entry) {
 501                 const char *refname = pe->path;
 502                 struct got_object_id *their_id = pe->data;
 503                 int have_their_id;
 504                 struct got_object *obj;
 505                 struct got_pathlist_entry *my_ref = NULL;
 506                 int is_tag = 0;
 507
 508                 /* Don't blindly trust the server to send us valid names. */
 509                 if (!got_ref_name_is_valid(refname))
 510                         continue;
 511
 512                 if (strncmp(refname, "refs/tags/", 10) == 0)
 513                         is_tag = 1;
 514                 /*
 515                  * Find out whether this is a reference we want to upload.
 516                  * Otherwise we can still use this reference as a hint to
 517                  * avoid uploading any objects the server already has.
 518                  */
 519                 my_ref = find_ref(&have_refs, refname);
 520                 if (my_ref) {
 521                         struct got_object_id *my_id = my_ref->data;
 522                         if (got_object_id_cmp(my_id, their_id) != 0) {
 523                                 if (!overwrite_refs && is_tag) {
 524                                         err = got_error_fmt(
 525                                             GOT_ERR_SEND_TAG_EXISTS,
 526                                             "%s", refname);
 527                                         goto done;
 528                                 }
 529                                 refs_to_send++;
 530                         }
 531                 }
 532
 533                 /* Check if their object exists locally. */
 534                 err = got_object_open(&obj, repo, their_id);
 535                 if (err) {
 536                         if (err->code != GOT_ERR_NO_OBJ)
 537                                 goto done;
 538                         if (!overwrite_refs && my_ref != NULL) {
 539                                 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY,
 540                                     "%s", refname);
 541                                 goto done;
 542                         }
 543                         have_their_id = 0;
 544                 } else {
 545                         got_object_close(obj);
 546                         have_their_id = 1;
 547                 }
 548
 549                 err = realloc_ids(&their_ids, &nalloc_theirs, ntheirs + 1);
 550                 if (err)
 551                         goto done;
 552
 553                 if (have_their_id) {
 554                         /* Enforce linear ancestry if required. */
 555                         if (!overwrite_refs && my_ref && !is_tag) {
 556                                 struct got_object_id *my_id = my_ref->data;
 557                                 err = check_common_ancestry(refname, my_id,
 558                                     their_id, repo, cancel_cb, cancel_arg);
 559                                 if (err)
 560                                         goto done;
 561                         }
 562                         /* Exclude any objects reachable via their ID. */
 563                         their_ids[ntheirs] = their_id;
 564                         ntheirs++;
 565                 } else if (!is_tag) {
 566                         char *remote_refname;
 567                         struct got_reference *ref;
 568                         /*
 569                          * Exclude any objects which exist on the server
 570                          * according to a locally cached remote reference.
 571                          */
 572                         err = get_remote_refname(&remote_refname,
 573                             remote_name, refname);
 574                         if (err)
 575                                 goto done;
 576                         err = got_ref_open(&ref, repo, remote_refname, 0);
 577                         free(remote_refname);
 578                         if (err) {
 579                                 if (err->code != GOT_ERR_NOT_REF)
 580                                         goto done;
 581                         } else {
 582                                 err = got_ref_resolve(&their_ids[ntheirs],
 583                                     repo, ref);
 584                                 got_ref_close(ref);
 585                                 if (err)
 586                                         goto done;
 587                                 ntheirs++;
 588                         }
 589                 }
 590         }
 591
 592         /* Account for any new references we are going to upload. */
 593         TAILQ_FOREACH(pe, &have_refs, entry) {
 594                 const char *refname = pe->path;
 595                 if (find_ref(&their_refs, refname) == NULL)
 596                         refs_to_send++;
 597         }
 598
 599         /* Account for any existing references we are going to delete. */
 600         TAILQ_FOREACH(pe, delete_branches, entry) {
 601                 const char *branchname = pe->path;
 602                 if (find_ref(&their_refs, branchname))
 603                         refs_to_delete++;
 604         }
 605
 606         if (refs_to_send == 0 && refs_to_delete == 0) {
 607                 got_privsep_send_stop(imsg_sendfds[0]);
 608                 goto done;
 609         }
 610
 611         if (refs_to_send > 0) {
 612                 struct got_ratelimit rl;
 613                 got_ratelimit_init(&rl, 0, 500);
 614                 memset(&ppa, 0, sizeof(ppa));
 615                 ppa.progress_cb = progress_cb;
 616                 ppa.progress_arg = progress_arg;
 617                 ppa.sendfd = sendfd;
 618                 err = got_pack_create(&packhash, packfd, delta_cache,
 619                     their_ids, ntheirs, our_ids, nours, repo, 0, 1, 0,
 620                     pack_progress, &ppa, &rl, cancel_cb, cancel_arg);
 621                 if (err)
 622                         goto done;
 623
 624                 npackfd = dup(packfd);
 625                 if (npackfd == -1) {
 626                         err = got_error_from_errno("dup");
 627                         goto done;
 628                 }
 629                 err = got_privsep_send_packfd(&sendibuf, npackfd);
 630                 if (err != NULL)
 631                         goto done;
 632                 npackfd = -1;
 633         } else {
 634                 err = got_privsep_send_packfd(&sendibuf, -1);
 635                 if (err != NULL)
 636                         goto done;
 637         }
 638
 639         while (!done) {
 640                 int success = 0;
 641                 char *refname = NULL;
 642                 char *errmsg = NULL;
 643
 644                 if (cancel_cb) {
 645                         err = (*cancel_cb)(cancel_arg);
 646                         if (err)
 647                                 goto done;
 648                 }
 649                 err = got_privsep_recv_send_progress(&done, &bytes_sent,
 650                     &success, &refname, &errmsg, &sendibuf);
 651                 if (err)
 652                         goto done;
 653                 if (refname && got_ref_name_is_valid(refname) && success &&
 654                     strncmp(refname, "refs/tags/", 10) != 0) {
 655                         struct got_pathlist_entry *my_ref;
 656                         /*
 657                          * The server has accepted our changes.
 658                          * Update our reference in refs/remotes/ accordingly.
 659                          */
 660                         my_ref = find_ref(&have_refs, refname);
 661                         if (my_ref) {
 662                                 err = update_remote_ref(my_ref, remote_name,
 663                                     repo);
 664                                 if (err)
 665                                         goto done;
 666                         }
 667                 }
 668                 if (refname != NULL ||
 669                     bytes_sent_cur != bytes_sent) {
 670                         err = progress_cb(progress_arg, ppa.ncolored,
 671                             ppa.nfound, ppa.ntrees, ppa.packfile_size,
 672                             ppa.ncommits, ppa.nobj_total, ppa.nobj_deltify,
 673                             ppa.nobj_written, bytes_sent,
 674                             refname, errmsg, success);
 675                         if (err) {
 676                                 free(refname);
 677                                 free(errmsg);
 678                                 goto done;
 679                         }
 680                         bytes_sent_cur = bytes_sent;
 681                 }
 682                 free(refname);
 683                 free(errmsg);
 684         }
 685 done:
 686         if (sendpid != -1) {
 687                 if (err)
 688                         got_privsep_send_stop(imsg_sendfds[0]);
 689                 if (waitpid(sendpid, &sendstatus, 0) == -1 && err == NULL)
 690                         err = got_error_from_errno("waitpid");
 691         }
 692         if (imsg_sendfds[0] != -1 && close(imsg_sendfds[0]) == -1 && err == NULL)
 693                 err = got_error_from_errno("close");
 694         if (imsg_sendfds[1] != -1 && close(imsg_sendfds[1]) == -1 && err == NULL)
 695                 err = got_error_from_errno("close");
 696         if (packfd != -1 && close(packfd) == -1 && err == NULL)
 697                 err = got_error_from_errno("close");
 698         if (delta_cache && fclose(delta_cache) == EOF && err == NULL)
 699                 err = got_error_from_errno("fclose");
 700         if (nsendfd != -1 && close(nsendfd) == -1 && err == NULL)
 701                 err = got_error_from_errno("close");
 702         if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
 703                 err = got_error_from_errno("close");
 704
 705         got_pathlist_free(&have_refs, GOT_PATHLIST_FREE_ALL);
 706         got_pathlist_free(&their_refs, GOT_PATHLIST_FREE_ALL);
 707         /*
 708          * Object ids are owned by have_refs/their_refs and are already freed;
 709          * Only the arrays must be freed.
 710          */
 711         free(our_ids);
 712         free(their_ids);
 713         free(s);
 714         return err;
 715 }