lib/send.c

   1 /*
   2  * Copyright (c) 2018, 2019 Ori Bernstein <ori@openbsd.org>
   3  * Copyright (c) 2021 Stefan Sperling <stsp@openbsd.org>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include <sys/types.h>
  19 #include <sys/stat.h>
  20 #include <sys/queue.h>
  21 #include <sys/uio.h>
  22 #include <sys/socket.h>
  23 #include <sys/wait.h>
  24 #include <sys/resource.h>
  25 #include <sys/socket.h>
  26
  27 #include <errno.h>
  28 #include <err.h>
  29 #include <fcntl.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <stdint.h>
  34 #include <unistd.h>
  35 #include <zlib.h>
  36 #include <ctype.h>
  37 #include <limits.h>
  38 #include <time.h>
  39
  40 #include "got_error.h"
  41 #include "got_reference.h"
  42 #include "got_repository.h"
  43 #include "got_path.h"
  44 #include "got_cancel.h"
  45 #include "got_worktree.h"
  46 #include "got_object.h"
  47 #include "got_opentemp.h"
  48 #include "got_send.h"
  49 #include "got_repository_admin.h"
  50 #include "got_commit_graph.h"
  51
  52 #include "got_lib_delta.h"
  53 #include "got_lib_inflate.h"
  54 #include "got_lib_object.h"
  55 #include "got_lib_object_parse.h"
  56 #include "got_lib_object_create.h"
  57 #include "got_lib_pack.h"
  58 #include "got_lib_sha1.h"
  59 #include "got_lib_privsep.h"
  60 #include "got_lib_object_cache.h"
  61 #include "got_lib_repository.h"
  62 #include "got_lib_ratelimit.h"
  63 #include "got_lib_pack_create.h"
  64 #include "got_lib_dial.h"
  65
  66 #ifndef nitems
  67 #define nitems(_a)      (sizeof((_a)) / sizeof((_a)[0]))
  68 #endif
  69
  70 #ifndef ssizeof
  71 #define ssizeof(_x) ((ssize_t)(sizeof(_x)))
  72 #endif
  73
  74 #ifndef MIN
  75 #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
  76 #endif
  77
  78 const struct got_error *
  79 got_send_connect(pid_t *sendpid, int *sendfd, const char *proto,
  80     const char *host, const char *port, const char *server_path, int verbosity)
  81 {
  82         const struct got_error *err = NULL;
  83
  84         *sendpid = -1;
  85         *sendfd = -1;
  86
  87         if (strcmp(proto, "ssh") == 0 || strcmp(proto, "git+ssh") == 0)
  88                 err = got_dial_ssh(sendpid, sendfd, host, port, server_path,
  89                     GOT_DIAL_DIRECTION_SEND, verbosity);
  90         else if (strcmp(proto, "git") == 0)
  91                 err = got_dial_git(sendfd, host, port, server_path,
  92                     GOT_DIAL_DIRECTION_SEND);
  93         else if (strcmp(proto, "http") == 0 || strcmp(proto, "git+http") == 0)
  94                 err = got_error_path(proto, GOT_ERR_NOT_IMPL);
  95         else
  96                 err = got_error_path(proto, GOT_ERR_BAD_PROTO);
  97         return err;
  98 }
  99
 100 struct pack_progress_arg {
 101     got_send_progress_cb progress_cb;
 102     void *progress_arg;
 103
 104     int ncolored;
 105     int nfound;
 106     int ntrees;
 107     off_t packfile_size;
 108     int ncommits;
 109     int nobj_total;
 110     int nobj_deltify;
 111     int nobj_written;
 112 };
 113
 114 static const struct got_error *
 115 pack_progress(void *arg, int ncolored, int nfound, int ntrees,
 116     off_t packfile_size, int ncommits, int nobj_total, int nobj_deltify,
 117     int nobj_written)
 118 {
 119         const struct got_error *err;
 120         struct pack_progress_arg *a = arg;
 121
 122         err = a->progress_cb(a->progress_arg, ncolored, nfound, ntrees,
 123             packfile_size, ncommits, nobj_total, nobj_deltify,
 124             nobj_written, 0, NULL, 0);
 125         if (err)
 126                 return err;
 127
 128         a->ncolored= ncolored;
 129         a->nfound = nfound;
 130         a->ntrees = ntrees;
 131         a->packfile_size = packfile_size;
 132         a->ncommits = ncommits;
 133         a->nobj_total = nobj_total;
 134         a->nobj_deltify = nobj_deltify;
 135         a->nobj_written = nobj_written;
 136         return NULL;
 137 }
 138
 139 static const struct got_error *
 140 insert_ref(struct got_reflist_head *refs, const char *refname,
 141     struct got_repository *repo)
 142 {
 143         const struct got_error *err;
 144         struct got_reference *ref;
 145         struct got_reflist_entry *new;
 146
 147         err = got_ref_open(&ref, repo, refname, 0);
 148         if (err)
 149                 return err;
 150
 151         err = got_reflist_insert(&new, refs, ref, got_ref_cmp_by_name, NULL);
 152         if (err || new == NULL /* duplicate */)
 153                 got_ref_close(ref);
 154
 155         return err;
 156 }
 157
 158 static const struct got_error *
 159 check_linear_ancestry(const char *refname, struct got_object_id *my_id,
 160     struct got_object_id *their_id, struct got_repository *repo,
 161     got_cancel_cb cancel_cb, void *cancel_arg)
 162 {
 163         const struct got_error *err = NULL;
 164         struct got_object_id *yca_id;
 165         int obj_type;
 166
 167         err = got_object_get_type(&obj_type, repo, their_id);
 168         if (err)
 169                 return err;
 170         if (obj_type != GOT_OBJ_TYPE_COMMIT)
 171                 return got_error_fmt(GOT_ERR_OBJ_TYPE,
 172                     "bad object type on server for %s", refname);
 173
 174         err = got_commit_graph_find_youngest_common_ancestor(&yca_id,
 175             my_id, their_id, 1, repo, cancel_cb, cancel_arg);
 176         if (err)
 177                 return err;
 178         if (yca_id == NULL)
 179                 return got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
 180
 181         /*
 182          * Require a straight line of history between the two commits,
 183          * with their commit being older than my commit.
 184          *
 185          * Non-linear situations such as this require a rebase:
 186          *
 187          * (theirs) D       F (mine)
 188          *           \     /
 189          *            C   E
 190          *             \ /
 191          *              B (yca)
 192          *              |
 193          *              A
 194          */
 195         if (got_object_id_cmp(their_id, yca_id) != 0)
 196                 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
 197
 198         free(yca_id);
 199         return err;
 200 }
 201
 202 static const struct got_error *
 203 realloc_ids(struct got_object_id ***ids, size_t *nalloc, size_t n)
 204 {
 205         struct got_object_id **new;
 206         const size_t alloc_chunksz = 256;
 207
 208         if (*nalloc >= n)
 209                 return NULL;
 210
 211         new = recallocarray(*ids, *nalloc, *nalloc + alloc_chunksz,
 212             sizeof(struct got_object_id));
 213         if (new == NULL)
 214                 return got_error_from_errno("recallocarray");
 215
 216         *ids = new;
 217         *nalloc += alloc_chunksz;
 218         return NULL;
 219 }
 220
 221 static struct got_reference *
 222 find_ref(struct got_reflist_head *refs, const char *refname)
 223 {
 224         struct got_reflist_entry *re;
 225
 226         TAILQ_FOREACH(re, refs, entry) {
 227                 if (got_path_cmp(got_ref_get_name(re->ref), refname,
 228                     strlen(got_ref_get_name(re->ref)),
 229                     strlen(refname)) == 0) {
 230                         return re->ref;
 231                 }
 232         }
 233
 234         return NULL;
 235 }
 236
 237 static struct got_pathlist_entry *
 238 find_their_ref(struct got_pathlist_head *their_refs, const char *refname)
 239 {
 240         struct got_pathlist_entry *pe;
 241
 242         TAILQ_FOREACH(pe, their_refs, entry) {
 243                 const char *their_refname = pe->path;
 244                 if (got_path_cmp(their_refname, refname,
 245                     strlen(their_refname), strlen(refname)) == 0) {
 246                         return pe;
 247                 }
 248         }
 249
 250         return NULL;
 251 }
 252
 253 static const struct got_error *
 254 get_remote_refname(char **remote_refname, const char *remote_name,
 255     const char *refname)
 256 {
 257         if (strncmp(refname, "refs/", 5) == 0)
 258                 refname += 5;
 259         if (strncmp(refname, "heads/", 6) == 0)
 260                 refname += 6;
 261
 262         if (asprintf(remote_refname, "refs/remotes/%s/%s",
 263             remote_name, refname) == -1)
 264                 return got_error_from_errno("asprintf");
 265
 266         return NULL;
 267 }
 268
 269 static const struct got_error *
 270 update_remote_ref(struct got_reference *my_ref, const char *remote_name,
 271     struct got_repository *repo)
 272 {
 273         const struct got_error *err, *unlock_err;
 274         struct got_object_id *my_id;
 275         struct got_reference *ref = NULL;
 276         char *remote_refname = NULL;
 277         int ref_locked = 0;
 278
 279         err = got_ref_resolve(&my_id, repo, my_ref);
 280         if (err)
 281                 return err;
 282
 283         err = get_remote_refname(&remote_refname, remote_name,
 284             got_ref_get_name(my_ref));
 285         if (err)
 286                 goto done;
 287
 288         err = got_ref_open(&ref, repo, remote_refname, 1 /* lock */);
 289         if (err) {
 290                 if (err->code != GOT_ERR_NOT_REF)
 291                         goto done;
 292                 err = got_ref_alloc(&ref, remote_refname, my_id);
 293                 if (err)
 294                         goto done;
 295         } else {
 296                 ref_locked = 1;
 297                 err = got_ref_change_ref(ref, my_id);
 298                 if (err)
 299                         goto done;
 300         }
 301
 302         err = got_ref_write(ref, repo);
 303 done:
 304         if (ref) {
 305                 if (ref_locked) {
 306                         unlock_err = got_ref_unlock(ref);
 307                         if (unlock_err && err == NULL)
 308                                 err = unlock_err;
 309                 }
 310                 got_ref_close(ref);
 311         }
 312         free(my_id);
 313         free(remote_refname);
 314         return err;
 315 }
 316
 317 const struct got_error*
 318 got_send_pack(const char *remote_name, struct got_pathlist_head *branch_names,
 319     struct got_pathlist_head *tag_names,
 320     struct got_pathlist_head *delete_branches,
 321     int verbosity, int overwrite_refs, int sendfd,
 322     struct got_repository *repo, got_send_progress_cb progress_cb,
 323     void *progress_arg, got_cancel_cb cancel_cb, void *cancel_arg)
 324 {
 325         int imsg_sendfds[2];
 326         int npackfd = -1, nsendfd = -1;
 327         int sendstatus, done = 0;
 328         const struct got_error *err;
 329         struct imsgbuf sendibuf;
 330         pid_t sendpid = -1;
 331         struct got_reflist_head refs;
 332         struct got_pathlist_head have_refs;
 333         struct got_pathlist_head their_refs;
 334         struct got_pathlist_entry *pe;
 335         struct got_reflist_entry *re;
 336         struct got_object_id **our_ids = NULL;
 337         struct got_object_id **their_ids = NULL;
 338         int i, nours = 0, ntheirs = 0;
 339         size_t nalloc_ours = 0, nalloc_theirs = 0;
 340         int refs_to_send = 0, refs_to_delete = 0;
 341         off_t bytes_sent = 0, bytes_sent_cur = 0;
 342         struct pack_progress_arg ppa;
 343         uint8_t packsha1[SHA1_DIGEST_LENGTH];
 344         int packfd = -1;
 345         FILE *delta_cache = NULL;
 346
 347         TAILQ_INIT(&refs);
 348         TAILQ_INIT(&have_refs);
 349         TAILQ_INIT(&their_refs);
 350
 351         TAILQ_FOREACH(pe, branch_names, entry) {
 352                 const char *branchname = pe->path;
 353                 if (strncmp(branchname, "refs/heads/", 11) != 0) {
 354                         char *s;
 355                         if (asprintf(&s, "refs/heads/%s", branchname) == -1) {
 356                                 err = got_error_from_errno("asprintf");
 357                                 goto done;
 358                         }
 359                         err = insert_ref(&refs, s, repo);
 360                         free(s);
 361                 } else {
 362                         err = insert_ref(&refs, branchname, repo);
 363                 }
 364                 if (err)
 365                         goto done;
 366         }
 367
 368         TAILQ_FOREACH(pe, delete_branches, entry) {
 369                 const char *branchname = pe->path;
 370                 struct got_reference *ref;
 371                 if (strncmp(branchname, "refs/heads/", 11) != 0) {
 372                         err = got_error_fmt(GOT_ERR_SEND_DELETE_REF, "%s",
 373                             branchname);
 374                         goto done;
 375                 }
 376                 ref = find_ref(&refs, branchname);
 377                 if (ref) {
 378                         err = got_error_fmt(GOT_ERR_SEND_DELETE_REF,
 379                             "changes on %s will be sent to server",
 380                             branchname);
 381                         goto done;
 382                 }
 383         }
 384
 385         TAILQ_FOREACH(pe, tag_names, entry) {
 386                 const char *tagname = pe->path;
 387                 if (strncmp(tagname, "refs/tags/", 10) != 0) {
 388                         char *s;
 389                         if (asprintf(&s, "refs/tags/%s", tagname) == -1) {
 390                                 err = got_error_from_errno("asprintf");
 391                                 goto done;
 392                         }
 393                         err = insert_ref(&refs, s, repo);
 394                         free(s);
 395                 } else {
 396                         err = insert_ref(&refs, tagname, repo);
 397                 }
 398                 if (err)
 399                         goto done;
 400         }
 401
 402         if (TAILQ_EMPTY(&refs) && TAILQ_EMPTY(delete_branches)) {
 403                 err = got_error(GOT_ERR_SEND_EMPTY);
 404                 goto done;
 405         }
 406
 407         TAILQ_FOREACH(re, &refs, entry) {
 408                 struct got_object_id *id;
 409                 int obj_type;
 410
 411                 if (got_ref_is_symbolic(re->ref)) {
 412                         err = got_error_fmt(GOT_ERR_BAD_REF_TYPE,
 413                             "cannot send symbolic reference %s",
 414                             got_ref_get_name(re->ref));
 415                         goto done;
 416                 }
 417
 418                 err = got_ref_resolve(&id, repo, re->ref);
 419                 if (err)
 420                         goto done;
 421                 err = got_object_get_type(&obj_type, repo, id);
 422                 free(id);
 423                 if (err)
 424                         goto done;
 425                 switch (obj_type) {
 426                 case GOT_OBJ_TYPE_COMMIT:
 427                 case GOT_OBJ_TYPE_TAG:
 428                         break;
 429                 default:
 430                         err = got_error_fmt(GOT_ERR_OBJ_TYPE,
 431                             "cannot send %s", got_ref_get_name(re->ref));
 432                         goto done;
 433                 }
 434         }
 435
 436         packfd = got_opentempfd();
 437         if (packfd == -1) {
 438                 err = got_error_from_errno("got_opentempfd");
 439                 goto done;
 440         }
 441
 442         delta_cache = got_opentemp();
 443         if (delta_cache == NULL) {
 444                 err = got_error_from_errno("got_opentemp");
 445                 goto done;
 446         }
 447
 448         if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_sendfds) == -1) {
 449                 err = got_error_from_errno("socketpair");
 450                 goto done;
 451         }
 452
 453         sendpid = fork();
 454         if (sendpid == -1) {
 455                 err = got_error_from_errno("fork");
 456                 goto done;
 457         } else if (sendpid == 0){
 458                 got_privsep_exec_child(imsg_sendfds,
 459                     GOT_PATH_PROG_SEND_PACK, got_repo_get_path(repo));
 460         }
 461
 462         if (close(imsg_sendfds[1]) == -1) {
 463                 err = got_error_from_errno("close");
 464                 goto done;
 465         }
 466         imsg_init(&sendibuf, imsg_sendfds[0]);
 467         nsendfd = dup(sendfd);
 468         if (nsendfd == -1) {
 469                 err = got_error_from_errno("dup");
 470                 goto done;
 471         }
 472
 473         /*
 474          * Convert reflist to pathlist since the privsep layer
 475          * is linked into helper programs which lack reference.c.
 476          */
 477         TAILQ_FOREACH(re, &refs, entry) {
 478                 struct got_object_id *id;
 479                 err = got_ref_resolve(&id, repo, re->ref);
 480                 if (err)
 481                         goto done;
 482                 err = got_pathlist_append(&have_refs,
 483                     got_ref_get_name(re->ref), id);
 484                 if (err)
 485                         goto done;
 486                 /*
 487                  * Also prepare the array of our object IDs which
 488                  * will be needed for generating a pack file.
 489                  */
 490                 err = realloc_ids(&our_ids, &nalloc_ours, nours + 1);
 491                 if (err)
 492                         goto done;
 493                 our_ids[nours] = id;
 494                 nours++;
 495         }
 496
 497         err = got_privsep_send_send_req(&sendibuf, nsendfd, &have_refs,
 498             delete_branches, verbosity);
 499         if (err)
 500                 goto done;
 501         nsendfd = -1;
 502
 503         err = got_privsep_recv_send_remote_refs(&their_refs, &sendibuf);
 504         if (err)
 505                 goto done;
 506
 507         /*
 508          * Process references reported by the server.
 509          * Push appropriate object IDs onto the "their IDs" array.
 510          * This array will be used to exclude objects which already
 511          * exist on the server from our pack file.
 512          */
 513         TAILQ_FOREACH(pe, &their_refs, entry) {
 514                 const char *refname = pe->path;
 515                 struct got_object_id *their_id = pe->data;
 516                 int have_their_id;
 517                 struct got_object *obj;
 518                 struct got_reference *my_ref = NULL;
 519                 int is_tag = 0;
 520
 521                 /* Don't blindly trust the server to send us valid names. */
 522                 if (!got_ref_name_is_valid(refname))
 523                         continue;
 524
 525                 if (strncmp(refname, "refs/tags/", 10) == 0)
 526                         is_tag = 1;
 527                 /*
 528                  * Find out whether this is a reference we want to upload.
 529                  * Otherwise we can still use this reference as a hint to
 530                  * avoid uploading any objects the server already has.
 531                  */
 532                 my_ref = find_ref(&refs, refname);
 533                 if (my_ref) {
 534                         struct got_object_id *my_id;
 535                         err = got_ref_resolve(&my_id, repo, my_ref);
 536                         if (err)
 537                                 goto done;
 538                         if (got_object_id_cmp(my_id, their_id) != 0) {
 539                                 if (!overwrite_refs && is_tag) {
 540                                         err = got_error_fmt(
 541                                             GOT_ERR_SEND_TAG_EXISTS,
 542                                             "%s", refname);
 543                                         free(my_id);
 544                                         goto done;
 545                                 }
 546                                 refs_to_send++;
 547                         }
 548                         free(my_id);
 549                 }
 550
 551                 /* Check if their object exists locally. */
 552                 err = got_object_open(&obj, repo, their_id);
 553                 if (err) {
 554                         if (err->code != GOT_ERR_NO_OBJ)
 555                                 goto done;
 556                         if (!overwrite_refs && my_ref != NULL) {
 557                                 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY,
 558                                     "%s", refname);
 559                                 goto done;
 560                         }
 561                         have_their_id = 0;
 562                 } else {
 563                         got_object_close(obj);
 564                         have_their_id = 1;
 565                 }
 566
 567                 err = realloc_ids(&their_ids, &nalloc_theirs, ntheirs + 1);
 568                 if (err)
 569                         goto done;
 570
 571                 if (have_their_id) {
 572                         /* Enforce linear ancestry if required. */
 573                         if (!overwrite_refs && my_ref && !is_tag) {
 574                                 struct got_object_id *my_id;
 575                                 err = got_ref_resolve(&my_id, repo, my_ref);
 576                                 if (err)
 577                                         goto done;
 578                                 err = check_linear_ancestry(refname, my_id,
 579                                     their_id, repo, cancel_cb, cancel_arg);
 580                                 free(my_id);
 581                                 my_id = NULL;
 582                                 if (err)
 583                                         goto done;
 584                         }
 585                         /* Exclude any objects reachable via their ID. */
 586                         their_ids[ntheirs] = got_object_id_dup(their_id);
 587                         if (their_ids[ntheirs] == NULL) {
 588                                 err = got_error_from_errno("got_object_id_dup");
 589                                 goto done;
 590                         }
 591                         ntheirs++;
 592                 } else if (!is_tag) {
 593                         char *remote_refname;
 594                         struct got_reference *ref;
 595                         /*
 596                          * Exclude any objects which exist on the server
 597                          * according to a locally cached remote reference.
 598                          */
 599                         err = get_remote_refname(&remote_refname,
 600                             remote_name, refname);
 601                         if (err)
 602                                 goto done;
 603                         err = got_ref_open(&ref, repo, remote_refname, 0);
 604                         free(remote_refname);
 605                         if (err) {
 606                                 if (err->code != GOT_ERR_NOT_REF)
 607                                         goto done;
 608                         } else {
 609                                 err = got_ref_resolve(&their_ids[ntheirs],
 610                                     repo, ref);
 611                                 got_ref_close(ref);
 612                                 if (err)
 613                                         goto done;
 614                                 ntheirs++;
 615                         }
 616                 }
 617         }
 618
 619         /* Account for any new references we are going to upload. */
 620         TAILQ_FOREACH(re, &refs, entry) {
 621                 if (find_their_ref(&their_refs,
 622                     got_ref_get_name(re->ref)) == NULL)
 623                         refs_to_send++;
 624         }
 625
 626         /* Account for any existing references we are going to delete. */
 627         TAILQ_FOREACH(pe, delete_branches, entry) {
 628                 const char *branchname = pe->path;
 629                 if (find_their_ref(&their_refs, branchname))
 630                         refs_to_delete++;
 631         }
 632
 633         if (refs_to_send == 0 && refs_to_delete == 0) {
 634                 got_privsep_send_stop(imsg_sendfds[0]);
 635                 goto done;
 636         }
 637
 638         if (refs_to_send > 0) {
 639                 struct got_ratelimit rl;
 640                 got_ratelimit_init(&rl, 0, 500);
 641                 memset(&ppa, 0, sizeof(ppa));
 642                 ppa.progress_cb = progress_cb;
 643                 ppa.progress_arg = progress_arg;
 644                 err = got_pack_create(packsha1, packfd, delta_cache,
 645                     their_ids, ntheirs, our_ids, nours, repo, 0, 1,
 646                     pack_progress, &ppa, &rl, cancel_cb, cancel_arg);
 647                 if (err)
 648                         goto done;
 649
 650                 npackfd = dup(packfd);
 651                 if (npackfd == -1) {
 652                         err = got_error_from_errno("dup");
 653                         goto done;
 654                 }
 655                 err = got_privsep_send_packfd(&sendibuf, npackfd);
 656                 if (err != NULL)
 657                         goto done;
 658                 npackfd = -1;
 659         } else {
 660                 err = got_privsep_send_packfd(&sendibuf, -1);
 661                 if (err != NULL)
 662                         goto done;
 663         }
 664
 665         while (!done) {
 666                 int success = 0;
 667                 char *refname = NULL;
 668                 if (cancel_cb) {
 669                         err = (*cancel_cb)(cancel_arg);
 670                         if (err)
 671                                 goto done;
 672                 }
 673                 err = got_privsep_recv_send_progress(&done, &bytes_sent,
 674                     &success, &refname, &sendibuf);
 675                 if (err)
 676                         goto done;
 677                 if (refname && got_ref_name_is_valid(refname) && success &&
 678                     strncmp(refname, "refs/tags/", 10) != 0) {
 679                         struct got_reference *my_ref;
 680                         /*
 681                          * The server has accepted our changes.
 682                          * Update our reference in refs/remotes/ accordingly.
 683                          */
 684                         my_ref = find_ref(&refs, refname);
 685                         if (my_ref) {
 686                                 err = update_remote_ref(my_ref, remote_name,
 687                                     repo);
 688                                 if (err)
 689                                         goto done;
 690                         }
 691                 }
 692                 if (refname != NULL ||
 693                     bytes_sent_cur != bytes_sent) {
 694                         err = progress_cb(progress_arg, ppa.ncolored,
 695                             ppa.nfound, ppa.ntrees, ppa.packfile_size,
 696                             ppa.ncommits, ppa.nobj_total, ppa.nobj_deltify,
 697                             ppa.nobj_written, bytes_sent,
 698                             refname, success);
 699                         if (err) {
 700                                 free(refname);
 701                                 goto done;
 702                         }
 703                         bytes_sent_cur = bytes_sent;
 704                 }
 705                 free(refname);
 706         }
 707 done:
 708         if (sendpid != -1) {
 709                 if (err)
 710                         got_privsep_send_stop(imsg_sendfds[0]);
 711                 if (waitpid(sendpid, &sendstatus, 0) == -1 && err == NULL)
 712                         err = got_error_from_errno("waitpid");
 713         }
 714         if (packfd != -1 && close(packfd) == -1 && err == NULL)
 715                 err = got_error_from_errno("close");
 716         if (delta_cache && fclose(delta_cache) == EOF && err == NULL)
 717                 err = got_error_from_errno("fclose");
 718         if (nsendfd != -1 && close(nsendfd) == -1 && err == NULL)
 719                 err = got_error_from_errno("close");
 720         if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
 721                 err = got_error_from_errno("close");
 722
 723         got_ref_list_free(&refs);
 724         got_pathlist_free(&have_refs);
 725         got_pathlist_free(&their_refs);
 726         for (i = 0; i < nours; i++)
 727                 free(our_ids[i]);
 728         free(our_ids);
 729         for (i = 0; i < ntheirs; i++)
 730                 free(their_ids[i]);
 731         free(their_ids);
 732         return err;
 733 }