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 "got_compat.h"
  19
  20 #include <sys/types.h>
  21 #include <sys/stat.h>
  22 #include <sys/queue.h>
  23 #include <sys/uio.h>
  24 #include <sys/socket.h>
  25 #include <sys/wait.h>
  26 #include <sys/resource.h>
  27 #include <sys/socket.h>
  28
  29 #include <errno.h>
  30 #include <err.h>
  31 #include <fcntl.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <stdint.h>
  36 #include <unistd.h>
  37 #include <zlib.h>
  38 #include <ctype.h>
  39 #include <limits.h>
  40 #include <time.h>
  41
  42 #include "got_error.h"
  43 #include "got_reference.h"
  44 #include "got_repository.h"
  45 #include "got_path.h"
  46 #include "got_cancel.h"
  47 #include "got_worktree.h"
  48 #include "got_object.h"
  49 #include "got_opentemp.h"
  50 #include "got_send.h"
  51 #include "got_repository_admin.h"
  52 #include "got_commit_graph.h"
  53
  54 #include "got_lib_delta.h"
  55 #include "got_lib_inflate.h"
  56 #include "got_lib_object.h"
  57 #include "got_lib_object_parse.h"
  58 #include "got_lib_object_create.h"
  59 #include "got_lib_pack.h"
  60 #include "got_lib_hash.h"
  61 #include "got_lib_privsep.h"
  62 #include "got_lib_object_cache.h"
  63 #include "got_lib_repository.h"
  64 #include "got_lib_ratelimit.h"
  65 #include "got_lib_pack_create.h"
  66 #include "got_lib_dial.h"
  67
  68 #ifndef nitems
  69 #define nitems(_a)      (sizeof((_a)) / sizeof((_a)[0]))
  70 #endif
  71
  72 #ifndef ssizeof
  73 #define ssizeof(_x) ((ssize_t)(sizeof(_x)))
  74 #endif
  75
  76 #ifndef MIN
  77 #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
  78 #endif
  79
  80 const struct got_error *
  81 got_send_connect(pid_t *sendpid, int *sendfd, const char *proto,
  82     const char *host, const char *port, const char *server_path, int verbosity)
  83 {
  84         const struct got_error *err = NULL;
  85
  86         *sendpid = -1;
  87         *sendfd = -1;
  88
  89         if (strcmp(proto, "ssh") == 0 || strcmp(proto, "git+ssh") == 0)
  90                 err = got_dial_ssh(sendpid, sendfd, host, port, server_path,
  91                     GOT_DIAL_DIRECTION_SEND, verbosity);
  92         else if (strcmp(proto, "git") == 0)
  93                 err = got_dial_git(sendfd, host, port, server_path,
  94                     GOT_DIAL_DIRECTION_SEND);
  95         else if (strcmp(proto, "http") == 0 || strcmp(proto, "git+http") == 0)
  96                 err = got_error_path(proto, GOT_ERR_NOT_IMPL);
  97         else
  98                 err = got_error_path(proto, GOT_ERR_BAD_PROTO);
  99         return err;
 100 }
 101
 102 struct pack_progress_arg {
 103     got_send_progress_cb progress_cb;
 104     void *progress_arg;
 105
 106     int ncolored;
 107     int nfound;
 108     int ntrees;
 109     off_t packfile_size;
 110     int ncommits;
 111     int nobj_total;
 112     int nobj_deltify;
 113     int nobj_written;
 114 };
 115
 116 static const struct got_error *
 117 pack_progress(void *arg, int ncolored, int nfound, int ntrees,
 118     off_t packfile_size, int ncommits, int nobj_total, int nobj_deltify,
 119     int nobj_written)
 120 {
 121         const struct got_error *err;
 122         struct pack_progress_arg *a = arg;
 123
 124         err = a->progress_cb(a->progress_arg, ncolored, nfound, ntrees,
 125             packfile_size, ncommits, nobj_total, nobj_deltify,
 126             nobj_written, 0, NULL, NULL, 0);
 127         if (err)
 128                 return err;
 129
 130         a->ncolored= ncolored;
 131         a->nfound = nfound;
 132         a->ntrees = ntrees;
 133         a->packfile_size = packfile_size;
 134         a->ncommits = ncommits;
 135         a->nobj_total = nobj_total;
 136         a->nobj_deltify = nobj_deltify;
 137         a->nobj_written = nobj_written;
 138         return NULL;
 139 }
 140
 141 static const struct got_error *
 142 insert_ref(struct got_reflist_head *refs, const char *refname,
 143     struct got_repository *repo)
 144 {
 145         const struct got_error *err;
 146         struct got_reference *ref;
 147         struct got_reflist_entry *new;
 148
 149         err = got_ref_open(&ref, repo, refname, 0);
 150         if (err)
 151                 return err;
 152
 153         err = got_reflist_insert(&new, refs, ref, got_ref_cmp_by_name, NULL);
 154         if (err || new == NULL /* duplicate */)
 155                 got_ref_close(ref);
 156
 157         return err;
 158 }
 159
 160 static const struct got_error *
 161 check_linear_ancestry(const char *refname, struct got_object_id *my_id,
 162     struct got_object_id *their_id, struct got_repository *repo,
 163     got_cancel_cb cancel_cb, void *cancel_arg)
 164 {
 165         const struct got_error *err = NULL;
 166         struct got_object_id *yca_id;
 167         int obj_type;
 168
 169         err = got_object_get_type(&obj_type, repo, their_id);
 170         if (err)
 171                 return err;
 172         if (obj_type != GOT_OBJ_TYPE_COMMIT)
 173                 return got_error_fmt(GOT_ERR_OBJ_TYPE,
 174                     "bad object type on server for %s", refname);
 175
 176         err = got_commit_graph_find_youngest_common_ancestor(&yca_id,
 177             my_id, their_id, 1, repo, cancel_cb, cancel_arg);
 178         if (err)
 179                 return err;
 180         if (yca_id == NULL)
 181                 return got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
 182
 183         /*
 184          * Require a straight line of history between the two commits,
 185          * with their commit being older than my commit.
 186          *
 187          * Non-linear situations such as this require a rebase:
 188          *
 189          * (theirs) D       F (mine)
 190          *           \     /
 191          *            C   E
 192          *             \ /
 193          *              B (yca)
 194          *              |
 195          *              A
 196          */
 197         if (got_object_id_cmp(their_id, yca_id) != 0)
 198                 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
 199
 200         free(yca_id);
 201         return err;
 202 }
 203
 204 static const struct got_error *
 205 realloc_ids(struct got_object_id ***ids, size_t *nalloc, size_t n)
 206 {
 207         struct got_object_id **new;
 208         const size_t alloc_chunksz = 256;
 209
 210         if (*nalloc >= n)
 211                 return NULL;
 212
 213         new = recallocarray(*ids, *nalloc, *nalloc + alloc_chunksz,
 214             sizeof(struct got_object_id));
 215         if (new == NULL)
 216                 return got_error_from_errno("recallocarray");
 217
 218         *ids = new;
 219         *nalloc += alloc_chunksz;
 220         return NULL;
 221 }
 222
 223 static struct got_reference *
 224 find_ref(struct got_reflist_head *refs, const char *refname)
 225 {
 226         struct got_reflist_entry *re;
 227
 228         TAILQ_FOREACH(re, refs, entry) {
 229                 if (got_path_cmp(got_ref_get_name(re->ref), refname,
 230                     strlen(got_ref_get_name(re->ref)),
 231                     strlen(refname)) == 0) {
 232                         return re->ref;
 233                 }
 234         }
 235
 236         return NULL;
 237 }
 238
 239 static struct got_pathlist_entry *
 240 find_their_ref(struct got_pathlist_head *their_refs, const char *refname)
 241 {
 242         struct got_pathlist_entry *pe;
 243
 244         TAILQ_FOREACH(pe, their_refs, entry) {
 245                 const char *their_refname = pe->path;
 246                 if (got_path_cmp(their_refname, refname,
 247                     strlen(their_refname), strlen(refname)) == 0) {
 248                         return pe;
 249                 }
 250         }
 251
 252         return NULL;
 253 }
 254
 255 static const struct got_error *
 256 get_remote_refname(char **remote_refname, const char *remote_name,
 257     const char *refname)
 258 {
 259         if (strncmp(refname, "refs/", 5) == 0)
 260                 refname += 5;
 261         if (strncmp(refname, "heads/", 6) == 0)
 262                 refname += 6;
 263
 264         if (asprintf(remote_refname, "refs/remotes/%s/%s",
 265             remote_name, refname) == -1)
 266                 return got_error_from_errno("asprintf");
 267
 268         return NULL;
 269 }
 270
 271 static const struct got_error *
 272 update_remote_ref(struct got_reference *my_ref, const char *remote_name,
 273     struct got_repository *repo)
 274 {
 275         const struct got_error *err, *unlock_err;
 276         struct got_object_id *my_id;
 277         struct got_reference *ref = NULL;
 278         char *remote_refname = NULL;
 279         int ref_locked = 0;
 280
 281         err = got_ref_resolve(&my_id, repo, my_ref);
 282         if (err)
 283                 return err;
 284
 285         err = get_remote_refname(&remote_refname, remote_name,
 286             got_ref_get_name(my_ref));
 287         if (err)
 288                 goto done;
 289
 290         err = got_ref_open(&ref, repo, remote_refname, 1 /* lock */);
 291         if (err) {
 292                 if (err->code != GOT_ERR_NOT_REF)
 293                         goto done;
 294                 err = got_ref_alloc(&ref, remote_refname, my_id);
 295                 if (err)
 296                         goto done;
 297         } else {
 298                 ref_locked = 1;
 299                 err = got_ref_change_ref(ref, my_id);
 300                 if (err)
 301                         goto done;
 302         }
 303
 304         err = got_ref_write(ref, repo);
 305 done:
 306         if (ref) {
 307                 if (ref_locked) {
 308                         unlock_err = got_ref_unlock(ref);
 309                         if (unlock_err && err == NULL)
 310                                 err = unlock_err;
 311                 }
 312                 got_ref_close(ref);
 313         }
 314         free(my_id);
 315         free(remote_refname);
 316         return err;
 317 }
 318
 319 const struct got_error*
 320 got_send_pack(const char *remote_name, struct got_pathlist_head *branch_names,
 321     struct got_pathlist_head *tag_names,
 322     struct got_pathlist_head *delete_branches,
 323     int verbosity, int overwrite_refs, int sendfd,
 324     struct got_repository *repo, got_send_progress_cb progress_cb,
 325     void *progress_arg, got_cancel_cb cancel_cb, void *cancel_arg)
 326 {
 327         int imsg_sendfds[2];
 328         int npackfd = -1, nsendfd = -1;
 329         int sendstatus, done = 0;
 330         const struct got_error *err;
 331         struct imsgbuf sendibuf;
 332         pid_t sendpid = -1;
 333         struct got_reflist_head refs;
 334         struct got_pathlist_head have_refs;
 335         struct got_pathlist_head their_refs;
 336         struct got_pathlist_entry *pe;
 337         struct got_reflist_entry *re;
 338         struct got_object_id **our_ids = NULL;
 339         struct got_object_id **their_ids = NULL;
 340         int i, nours = 0, ntheirs = 0;
 341         size_t nalloc_ours = 0, nalloc_theirs = 0;
 342         int refs_to_send = 0, refs_to_delete = 0;
 343         off_t bytes_sent = 0, bytes_sent_cur = 0;
 344         struct pack_progress_arg ppa;
 345         uint8_t packsha1[SHA1_DIGEST_LENGTH];
 346         int packfd = -1;
 347         FILE *delta_cache = NULL;
 348
 349         TAILQ_INIT(&refs);
 350         TAILQ_INIT(&have_refs);
 351         TAILQ_INIT(&their_refs);
 352
 353         TAILQ_FOREACH(pe, branch_names, entry) {
 354                 const char *branchname = pe->path;
 355                 if (strncmp(branchname, "refs/heads/", 11) != 0) {
 356                         char *s;
 357                         if (asprintf(&s, "refs/heads/%s", branchname) == -1) {
 358                                 err = got_error_from_errno("asprintf");
 359                                 goto done;
 360                         }
 361                         err = insert_ref(&refs, s, repo);
 362                         free(s);
 363                 } else {
 364                         err = insert_ref(&refs, branchname, repo);
 365                 }
 366                 if (err)
 367                         goto done;
 368         }
 369
 370         TAILQ_FOREACH(pe, delete_branches, entry) {
 371                 const char *branchname = pe->path;
 372                 struct got_reference *ref;
 373                 if (strncmp(branchname, "refs/heads/", 11) != 0) {
 374                         err = got_error_fmt(GOT_ERR_SEND_DELETE_REF, "%s",
 375                             branchname);
 376                         goto done;
 377                 }
 378                 ref = find_ref(&refs, branchname);
 379                 if (ref) {
 380                         err = got_error_fmt(GOT_ERR_SEND_DELETE_REF,
 381                             "changes on %s will be sent to server",
 382                             branchname);
 383                         goto done;
 384                 }
 385         }
 386
 387         TAILQ_FOREACH(pe, tag_names, entry) {
 388                 const char *tagname = pe->path;
 389                 if (strncmp(tagname, "refs/tags/", 10) != 0) {
 390                         char *s;
 391                         if (asprintf(&s, "refs/tags/%s", tagname) == -1) {
 392                                 err = got_error_from_errno("asprintf");
 393                                 goto done;
 394                         }
 395                         err = insert_ref(&refs, s, repo);
 396                         free(s);
 397                 } else {
 398                         err = insert_ref(&refs, tagname, repo);
 399                 }
 400                 if (err)
 401                         goto done;
 402         }
 403
 404         if (TAILQ_EMPTY(&refs) && TAILQ_EMPTY(delete_branches)) {
 405                 err = got_error(GOT_ERR_SEND_EMPTY);
 406                 goto done;
 407         }
 408
 409         TAILQ_FOREACH(re, &refs, entry) {
 410                 struct got_object_id *id;
 411                 int obj_type;
 412
 413                 if (got_ref_is_symbolic(re->ref)) {
 414                         err = got_error_fmt(GOT_ERR_BAD_REF_TYPE,
 415                             "cannot send symbolic reference %s",
 416                             got_ref_get_name(re->ref));
 417                         goto done;
 418                 }
 419
 420                 err = got_ref_resolve(&id, repo, re->ref);
 421                 if (err)
 422                         goto done;
 423                 err = got_object_get_type(&obj_type, repo, id);
 424                 free(id);
 425                 if (err)
 426                         goto done;
 427                 switch (obj_type) {
 428                 case GOT_OBJ_TYPE_COMMIT:
 429                 case GOT_OBJ_TYPE_TAG:
 430                         break;
 431                 default:
 432                         err = got_error_fmt(GOT_ERR_OBJ_TYPE,
 433                             "cannot send %s", got_ref_get_name(re->ref));
 434                         goto done;
 435                 }
 436         }
 437
 438         packfd = got_opentempfd();
 439         if (packfd == -1) {
 440                 err = got_error_from_errno("got_opentempfd");
 441                 goto done;
 442         }
 443
 444         delta_cache = got_opentemp();
 445         if (delta_cache == NULL) {
 446                 err = got_error_from_errno("got_opentemp");
 447                 goto done;
 448         }
 449
 450         if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_sendfds) == -1) {
 451                 err = got_error_from_errno("socketpair");
 452                 goto done;
 453         }
 454
 455         sendpid = fork();
 456         if (sendpid == -1) {
 457                 err = got_error_from_errno("fork");
 458                 goto done;
 459         } else if (sendpid == 0){
 460                 got_privsep_exec_child(imsg_sendfds,
 461                     GOT_PATH_PROG_SEND_PACK, got_repo_get_path(repo));
 462         }
 463
 464         if (close(imsg_sendfds[1]) == -1) {
 465                 err = got_error_from_errno("close");
 466                 goto done;
 467         }
 468         imsg_init(&sendibuf, imsg_sendfds[0]);
 469         nsendfd = dup(sendfd);
 470         if (nsendfd == -1) {
 471                 err = got_error_from_errno("dup");
 472                 goto done;
 473         }
 474
 475         /*
 476          * Convert reflist to pathlist since the privsep layer
 477          * is linked into helper programs which lack reference.c.
 478          */
 479         TAILQ_FOREACH(re, &refs, entry) {
 480                 struct got_object_id *id;
 481                 err = got_ref_resolve(&id, repo, re->ref);
 482                 if (err)
 483                         goto done;
 484                 err = got_pathlist_append(&have_refs,
 485                     got_ref_get_name(re->ref), id);
 486                 if (err)
 487                         goto done;
 488                 /*
 489                  * Also prepare the array of our object IDs which
 490                  * will be needed for generating a pack file.
 491                  */
 492                 err = realloc_ids(&our_ids, &nalloc_ours, nours + 1);
 493                 if (err)
 494                         goto done;
 495                 our_ids[nours] = id;
 496                 nours++;
 497         }
 498
 499         err = got_privsep_send_send_req(&sendibuf, nsendfd, &have_refs,
 500             delete_branches, verbosity);
 501         if (err)
 502                 goto done;
 503         nsendfd = -1;
 504
 505         err = got_privsep_recv_send_remote_refs(&their_refs, &sendibuf);
 506         if (err)
 507                 goto done;
 508
 509         /*
 510          * Process references reported by the server.
 511          * Push appropriate object IDs onto the "their IDs" array.
 512          * This array will be used to exclude objects which already
 513          * exist on the server from our pack file.
 514          */
 515         TAILQ_FOREACH(pe, &their_refs, entry) {
 516                 const char *refname = pe->path;
 517                 struct got_object_id *their_id = pe->data;
 518                 int have_their_id;
 519                 struct got_object *obj;
 520                 struct got_reference *my_ref = NULL;
 521                 int is_tag = 0;
 522
 523                 /* Don't blindly trust the server to send us valid names. */
 524                 if (!got_ref_name_is_valid(refname))
 525                         continue;
 526
 527                 if (strncmp(refname, "refs/tags/", 10) == 0)
 528                         is_tag = 1;
 529                 /*
 530                  * Find out whether this is a reference we want to upload.
 531                  * Otherwise we can still use this reference as a hint to
 532                  * avoid uploading any objects the server already has.
 533                  */
 534                 my_ref = find_ref(&refs, refname);
 535                 if (my_ref) {
 536                         struct got_object_id *my_id;
 537                         err = got_ref_resolve(&my_id, repo, my_ref);
 538                         if (err)
 539                                 goto done;
 540                         if (got_object_id_cmp(my_id, their_id) != 0) {
 541                                 if (!overwrite_refs && is_tag) {
 542                                         err = got_error_fmt(
 543                                             GOT_ERR_SEND_TAG_EXISTS,
 544                                             "%s", refname);
 545                                         free(my_id);
 546                                         goto done;
 547                                 }
 548                                 refs_to_send++;
 549                         }
 550                         free(my_id);
 551                 }
 552
 553                 /* Check if their object exists locally. */
 554                 err = got_object_open(&obj, repo, their_id);
 555                 if (err) {
 556                         if (err->code != GOT_ERR_NO_OBJ)
 557                                 goto done;
 558                         if (!overwrite_refs && my_ref != NULL) {
 559                                 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY,
 560                                     "%s", refname);
 561                                 goto done;
 562                         }
 563                         have_their_id = 0;
 564                 } else {
 565                         got_object_close(obj);
 566                         have_their_id = 1;
 567                 }
 568
 569                 err = realloc_ids(&their_ids, &nalloc_theirs, ntheirs + 1);
 570                 if (err)
 571                         goto done;
 572
 573                 if (have_their_id) {
 574                         /* Enforce linear ancestry if required. */
 575                         if (!overwrite_refs && my_ref && !is_tag) {
 576                                 struct got_object_id *my_id;
 577                                 err = got_ref_resolve(&my_id, repo, my_ref);
 578                                 if (err)
 579                                         goto done;
 580                                 err = check_linear_ancestry(refname, my_id,
 581                                     their_id, repo, cancel_cb, cancel_arg);
 582                                 free(my_id);
 583                                 my_id = NULL;
 584                                 if (err)
 585                                         goto done;
 586                         }
 587                         /* Exclude any objects reachable via their ID. */
 588                         their_ids[ntheirs] = got_object_id_dup(their_id);
 589                         if (their_ids[ntheirs] == NULL) {
 590                                 err = got_error_from_errno("got_object_id_dup");
 591                                 goto done;
 592                         }
 593                         ntheirs++;
 594                 } else if (!is_tag) {
 595                         char *remote_refname;
 596                         struct got_reference *ref;
 597                         /*
 598                          * Exclude any objects which exist on the server
 599                          * according to a locally cached remote reference.
 600                          */
 601                         err = get_remote_refname(&remote_refname,
 602                             remote_name, refname);
 603                         if (err)
 604                                 goto done;
 605                         err = got_ref_open(&ref, repo, remote_refname, 0);
 606                         free(remote_refname);
 607                         if (err) {
 608                                 if (err->code != GOT_ERR_NOT_REF)
 609                                         goto done;
 610                         } else {
 611                                 err = got_ref_resolve(&their_ids[ntheirs],
 612                                     repo, ref);
 613                                 got_ref_close(ref);
 614                                 if (err)
 615                                         goto done;
 616                                 ntheirs++;
 617                         }
 618                 }
 619         }
 620
 621         /* Account for any new references we are going to upload. */
 622         TAILQ_FOREACH(re, &refs, entry) {
 623                 if (find_their_ref(&their_refs,
 624                     got_ref_get_name(re->ref)) == NULL)
 625                         refs_to_send++;
 626         }
 627
 628         /* Account for any existing references we are going to delete. */
 629         TAILQ_FOREACH(pe, delete_branches, entry) {
 630                 const char *branchname = pe->path;
 631                 if (find_their_ref(&their_refs, branchname))
 632                         refs_to_delete++;
 633         }
 634
 635         if (refs_to_send == 0 && refs_to_delete == 0) {
 636                 got_privsep_send_stop(imsg_sendfds[0]);
 637                 goto done;
 638         }
 639
 640         if (refs_to_send > 0) {
 641                 struct got_ratelimit rl;
 642                 got_ratelimit_init(&rl, 0, 500);
 643                 memset(&ppa, 0, sizeof(ppa));
 644                 ppa.progress_cb = progress_cb;
 645                 ppa.progress_arg = progress_arg;
 646                 err = got_pack_create(packsha1, packfd, delta_cache,
 647                     their_ids, ntheirs, our_ids, nours, repo, 0, 1, 0,
 648                     pack_progress, &ppa, &rl, cancel_cb, cancel_arg);
 649                 if (err)
 650                         goto done;
 651
 652                 npackfd = dup(packfd);
 653                 if (npackfd == -1) {
 654                         err = got_error_from_errno("dup");
 655                         goto done;
 656                 }
 657                 err = got_privsep_send_packfd(&sendibuf, npackfd);
 658                 if (err != NULL)
 659                         goto done;
 660                 npackfd = -1;
 661         } else {
 662                 err = got_privsep_send_packfd(&sendibuf, -1);
 663                 if (err != NULL)
 664                         goto done;
 665         }
 666
 667         while (!done) {
 668                 int success = 0;
 669                 char *refname = NULL;
 670                 char *errmsg = NULL;
 671
 672                 if (cancel_cb) {
 673                         err = (*cancel_cb)(cancel_arg);
 674                         if (err)
 675                                 goto done;
 676                 }
 677                 err = got_privsep_recv_send_progress(&done, &bytes_sent,
 678                     &success, &refname, &errmsg, &sendibuf);
 679                 if (err)
 680                         goto done;
 681                 if (refname && got_ref_name_is_valid(refname) && success &&
 682                     strncmp(refname, "refs/tags/", 10) != 0) {
 683                         struct got_reference *my_ref;
 684                         /*
 685                          * The server has accepted our changes.
 686                          * Update our reference in refs/remotes/ accordingly.
 687                          */
 688                         my_ref = find_ref(&refs, refname);
 689                         if (my_ref) {
 690                                 err = update_remote_ref(my_ref, remote_name,
 691                                     repo);
 692                                 if (err)
 693                                         goto done;
 694                         }
 695                 }
 696                 if (refname != NULL ||
 697                     bytes_sent_cur != bytes_sent) {
 698                         err = progress_cb(progress_arg, ppa.ncolored,
 699                             ppa.nfound, ppa.ntrees, ppa.packfile_size,
 700                             ppa.ncommits, ppa.nobj_total, ppa.nobj_deltify,
 701                             ppa.nobj_written, bytes_sent,
 702                             refname, errmsg, success);
 703                         if (err) {
 704                                 free(refname);
 705                                 free(errmsg);
 706                                 goto done;
 707                         }
 708                         bytes_sent_cur = bytes_sent;
 709                 }
 710                 free(refname);
 711                 free(errmsg);
 712         }
 713 done:
 714         if (sendpid != -1) {
 715                 if (err)
 716                         got_privsep_send_stop(imsg_sendfds[0]);
 717                 if (waitpid(sendpid, &sendstatus, 0) == -1 && err == NULL)
 718                         err = got_error_from_errno("waitpid");
 719         }
 720         if (packfd != -1 && close(packfd) == -1 && err == NULL)
 721                 err = got_error_from_errno("close");
 722         if (delta_cache && fclose(delta_cache) == EOF && err == NULL)
 723                 err = got_error_from_errno("fclose");
 724         if (nsendfd != -1 && close(nsendfd) == -1 && err == NULL)
 725                 err = got_error_from_errno("close");
 726         if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
 727                 err = got_error_from_errno("close");
 728
 729         got_ref_list_free(&refs);
 730         got_pathlist_free(&have_refs, GOT_PATHLIST_FREE_NONE);
 731         got_pathlist_free(&their_refs, GOT_PATHLIST_FREE_NONE);
 732         for (i = 0; i < nours; i++)
 733                 free(our_ids[i]);
 734         free(our_ids);
 735         for (i = 0; i < ntheirs; i++)
 736                 free(their_ids[i]);
 737         free(their_ids);
 738         return err;
 739 }