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         if (new == NULL && err == NULL)
 202                 err = got_error(GOT_ERR_REF_DUP_ENTRY);
 203
 204 done:
 205         if (ref)
 206                 got_ref_close(ref);
 207         if (err)
 208                 free(id);
 209         return err;
 210 }
 211
 212 static const struct got_error *
 213 check_common_ancestry(const char *refname, struct got_object_id *my_id,
 214     struct got_object_id *their_id, struct got_repository *repo,
 215     got_cancel_cb cancel_cb, void *cancel_arg)
 216 {
 217         const struct got_error *err = NULL;
 218         struct got_object_id *yca_id;
 219         int obj_type;
 220
 221         err = got_object_get_type(&obj_type, repo, their_id);
 222         if (err)
 223                 return err;
 224         if (obj_type != GOT_OBJ_TYPE_COMMIT)
 225                 return got_error_fmt(GOT_ERR_OBJ_TYPE,
 226                     "bad object type on server for %s", refname);
 227
 228         err = got_commit_graph_find_youngest_common_ancestor(&yca_id,
 229             my_id, their_id, 0, 1, repo, cancel_cb, cancel_arg);
 230         if (err)
 231                 return err;
 232         if (yca_id == NULL)
 233                 return got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
 234
 235         if (got_object_id_cmp(their_id, yca_id) != 0)
 236                 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
 237
 238         free(yca_id);
 239         return err;
 240 }
 241
 242 static const struct got_error *
 243 realloc_ids(struct got_object_id ***ids, size_t *nalloc, size_t n)
 244 {
 245         struct got_object_id **new;
 246         const size_t alloc_chunksz = 256;
 247
 248         if (*nalloc >= n)
 249                 return NULL;
 250
 251         new = recallocarray(*ids, *nalloc, *nalloc + alloc_chunksz,
 252             sizeof(struct got_object_id));
 253         if (new == NULL)
 254                 return got_error_from_errno("recallocarray");
 255
 256         *ids = new;
 257         *nalloc += alloc_chunksz;
 258         return NULL;
 259 }
 260
 261 static struct got_pathlist_entry *
 262 find_ref(struct got_pathlist_head *refs, const char *refname)
 263 {
 264         struct got_pathlist_entry *pe;
 265
 266         TAILQ_FOREACH(pe, refs, entry) {
 267                 if (got_path_cmp(pe->path, refname, strlen(pe->path),
 268                     strlen(refname)) == 0) {
 269                         return pe;
 270                 }
 271         }
 272
 273         return NULL;
 274 }
 275
 276 static const struct got_error *
 277 get_remote_refname(char **remote_refname, const char *remote_name,
 278     const char *refname)
 279 {
 280         if (strncmp(refname, "refs/", 5) == 0)
 281                 refname += 5;
 282         if (strncmp(refname, "heads/", 6) == 0)
 283                 refname += 6;
 284
 285         if (asprintf(remote_refname, "refs/remotes/%s/%s",
 286             remote_name, refname) == -1)
 287                 return got_error_from_errno("asprintf");
 288
 289         return NULL;
 290 }
 291
 292 static const struct got_error *
 293 update_remote_ref(struct got_pathlist_entry *my_ref, const char *remote_name,
 294     struct got_repository *repo)
 295 {
 296         const struct got_error *err, *unlock_err;
 297         const char *refname = my_ref->path;
 298         struct got_object_id *my_id = my_ref->data;
 299         struct got_reference *ref = NULL;
 300         char *remote_refname = NULL;
 301         int ref_locked = 0;
 302
 303         err = get_remote_refname(&remote_refname, remote_name, refname);
 304         if (err)
 305                 goto done;
 306
 307         err = got_ref_open(&ref, repo, remote_refname, 1 /* lock */);
 308         if (err) {
 309                 if (err->code != GOT_ERR_NOT_REF)
 310                         goto done;
 311                 err = got_ref_alloc(&ref, remote_refname, my_id);
 312                 if (err)
 313                         goto done;
 314         } else {
 315                 ref_locked = 1;
 316                 err = got_ref_change_ref(ref, my_id);
 317                 if (err)
 318                         goto done;
 319         }
 320
 321         err = got_ref_write(ref, repo);
 322 done:
 323         if (ref) {
 324                 if (ref_locked) {
 325                         unlock_err = got_ref_unlock(ref);
 326                         if (unlock_err && err == NULL)
 327                                 err = unlock_err;
 328                 }
 329                 got_ref_close(ref);
 330         }
 331         free(remote_refname);
 332         return err;
 333 }
 334
 335 const struct got_error*
 336 got_send_pack(const char *remote_name, struct got_pathlist_head *branch_names,
 337     struct got_pathlist_head *tag_names,
 338     struct got_pathlist_head *delete_branches,
 339     int verbosity, int overwrite_refs, int sendfd,
 340     struct got_repository *repo, got_send_progress_cb progress_cb,
 341     void *progress_arg, got_cancel_cb cancel_cb, void *cancel_arg)
 342 {
 343         int imsg_sendfds[2] = { -1, -1 };
 344         int npackfd = -1, nsendfd = -1;
 345         int sendstatus, done = 0;
 346         const struct got_error *err;
 347         struct imsgbuf sendibuf;
 348         pid_t sendpid = -1;
 349         struct got_pathlist_head have_refs;
 350         struct got_pathlist_head their_refs;
 351         struct got_pathlist_entry *pe;
 352         struct got_object_id **our_ids = NULL;
 353         struct got_object_id **their_ids = NULL;
 354         int nours = 0, ntheirs = 0;
 355         size_t nalloc_ours = 0, nalloc_theirs = 0;
 356         int refs_to_send = 0, refs_to_delete = 0;
 357         off_t bytes_sent = 0, bytes_sent_cur = 0;
 358         struct pack_progress_arg ppa;
 359         struct got_object_id packhash;
 360         int packfd = -1;
 361         FILE *delta_cache = NULL;
 362         char *s = NULL;
 363
 364         TAILQ_INIT(&have_refs);
 365         TAILQ_INIT(&their_refs);
 366
 367         if (got_repo_get_object_format(repo) != GOT_HASH_SHA1)
 368                 return got_error_fmt(GOT_ERR_NOT_IMPL,
 369                     "sha256 object IDs unsupported in network protocol");
 370
 371         TAILQ_FOREACH(pe, branch_names, entry) {
 372                 const char *branchname = pe->path;
 373                 const char *targetname = pe->data;
 374
 375                 if (targetname == NULL)
 376                         targetname = branchname;
 377
 378                 if (strncmp(targetname, "refs/heads/", 11) != 0) {
 379                         if (asprintf(&s, "refs/heads/%s", targetname) == -1) {
 380                                 err = got_error_from_errno("asprintf");
 381                                 goto done;
 382                         }
 383                 } else {
 384                         if ((s = strdup(targetname)) == NULL) {
 385                                 err = got_error_from_errno("strdup");
 386                                 goto done;
 387                         }
 388                 }
 389                 err = insert_sendable_ref(&have_refs, branchname, s, repo);
 390                 if (err) {
 391                         if (err->code != GOT_ERR_REF_DUP_ENTRY)
 392                                 goto done;
 393                         err = NULL;
 394                         free(s);
 395                 }
 396                 s = NULL;
 397         }
 398
 399         TAILQ_FOREACH(pe, delete_branches, entry) {
 400                 const char *branchname = pe->path;
 401                 struct got_pathlist_entry *ref;
 402                 if (strncmp(branchname, "refs/heads/", 11) != 0) {
 403                         err = got_error_fmt(GOT_ERR_SEND_DELETE_REF, "%s",
 404                             branchname);
 405                         goto done;
 406                 }
 407                 ref = find_ref(&have_refs, branchname);
 408                 if (ref) {
 409                         err = got_error_fmt(GOT_ERR_SEND_DELETE_REF,
 410                             "changes on %s will be sent to server",
 411                             branchname);
 412                         goto done;
 413                 }
 414         }
 415
 416         TAILQ_FOREACH(pe, tag_names, entry) {
 417                 const char *tagname = pe->path;
 418                 if (strncmp(tagname, "refs/tags/", 10) != 0) {
 419                         if (asprintf(&s, "refs/tags/%s", tagname) == -1) {
 420                                 err = got_error_from_errno("asprintf");
 421                                 goto done;
 422                         }
 423                 } else {
 424                         if ((s = strdup(pe->path)) == NULL) {
 425                                 err = got_error_from_errno("strdup");
 426                                 goto done;
 427                         }
 428                 }
 429                 err = insert_sendable_ref(&have_refs, s, s, repo);
 430                 if (err) {
 431                         if (err->code != GOT_ERR_REF_DUP_ENTRY)
 432                                 goto done;
 433                         err = NULL;
 434                         free(s);
 435                 }
 436                 s = NULL;
 437         }
 438
 439         if (TAILQ_EMPTY(&have_refs) && TAILQ_EMPTY(delete_branches)) {
 440                 err = got_error(GOT_ERR_SEND_EMPTY);
 441                 goto done;
 442         }
 443
 444         packfd = got_opentempfd();
 445         if (packfd == -1) {
 446                 err = got_error_from_errno("got_opentempfd");
 447                 goto done;
 448         }
 449
 450         delta_cache = got_opentemp();
 451         if (delta_cache == NULL) {
 452                 err = got_error_from_errno("got_opentemp");
 453                 goto done;
 454         }
 455
 456         if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_sendfds) == -1) {
 457                 err = got_error_from_errno("socketpair");
 458                 goto done;
 459         }
 460
 461         sendpid = fork();
 462         if (sendpid == -1) {
 463                 err = got_error_from_errno("fork");
 464                 goto done;
 465         } else if (sendpid == 0) {
 466                 got_privsep_exec_child(imsg_sendfds,
 467                     GOT_PATH_PROG_SEND_PACK, got_repo_get_path(repo));
 468         }
 469
 470         if (close(imsg_sendfds[1]) == -1) {
 471                 err = got_error_from_errno("close");
 472                 goto done;
 473         }
 474         imsg_sendfds[1] = -1;
 475         if (imsgbuf_init(&sendibuf, imsg_sendfds[0]) == -1) {
 476                 err = got_error_from_errno("imsgbuf_init");
 477                 goto done;
 478         }
 479         imsgbuf_allow_fdpass(&sendibuf);
 480         nsendfd = dup(sendfd);
 481         if (nsendfd == -1) {
 482                 err = got_error_from_errno("dup");
 483                 goto done;
 484         }
 485
 486         /*
 487          * Prepare the array of our object IDs which
 488          * will be needed for generating a pack file.
 489          */
 490         TAILQ_FOREACH(pe, &have_refs, entry) {
 491                 struct got_object_id *id = pe->data;
 492
 493                 err = realloc_ids(&our_ids, &nalloc_ours, nours + 1);
 494                 if (err)
 495                         goto done;
 496                 our_ids[nours] = id;
 497                 nours++;
 498         }
 499
 500         err = got_privsep_send_send_req(&sendibuf, nsendfd, &have_refs,
 501             delete_branches, verbosity);
 502         if (err)
 503                 goto done;
 504         nsendfd = -1;
 505
 506         err = got_privsep_recv_send_remote_refs(&their_refs, &sendibuf);
 507         if (err)
 508                 goto done;
 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_pathlist_entry *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(&have_refs, refname);
 535                 if (my_ref) {
 536                         struct got_object_id *my_id = my_ref->data;
 537                         if (got_object_id_cmp(my_id, their_id) != 0) {
 538                                 if (!overwrite_refs && is_tag) {
 539                                         err = got_error_fmt(
 540                                             GOT_ERR_SEND_TAG_EXISTS,
 541                                             "%s", refname);
 542                                         goto done;
 543                                 }
 544                                 refs_to_send++;
 545                         }
 546                 }
 547
 548                 /* Check if their object exists locally. */
 549                 err = got_object_open(&obj, repo, their_id);
 550                 if (err) {
 551                         if (err->code != GOT_ERR_NO_OBJ)
 552                                 goto done;
 553                         if (!overwrite_refs && my_ref != NULL) {
 554                                 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY,
 555                                     "%s", refname);
 556                                 goto done;
 557                         }
 558                         have_their_id = 0;
 559                 } else {
 560                         got_object_close(obj);
 561                         have_their_id = 1;
 562                 }
 563
 564                 err = realloc_ids(&their_ids, &nalloc_theirs, ntheirs + 1);
 565                 if (err)
 566                         goto done;
 567
 568                 if (have_their_id) {
 569                         /* Enforce linear ancestry if required. */
 570                         if (!overwrite_refs && my_ref && !is_tag) {
 571                                 struct got_object_id *my_id = my_ref->data;
 572                                 err = check_common_ancestry(refname, my_id,
 573                                     their_id, repo, cancel_cb, cancel_arg);
 574                                 if (err)
 575                                         goto done;
 576                         }
 577                         /* Exclude any objects reachable via their ID. */
 578                         their_ids[ntheirs] = their_id;
 579                         ntheirs++;
 580                 } else if (!is_tag) {
 581                         char *remote_refname;
 582                         struct got_reference *ref;
 583                         /*
 584                          * Exclude any objects which exist on the server
 585                          * according to a locally cached remote reference.
 586                          */
 587                         err = get_remote_refname(&remote_refname,
 588                             remote_name, refname);
 589                         if (err)
 590                                 goto done;
 591                         err = got_ref_open(&ref, repo, remote_refname, 0);
 592                         free(remote_refname);
 593                         if (err) {
 594                                 if (err->code != GOT_ERR_NOT_REF)
 595                                         goto done;
 596                                 err = NULL;
 597                         } else {
 598                                 err = got_ref_resolve(&their_ids[ntheirs],
 599                                     repo, ref);
 600                                 got_ref_close(ref);
 601                                 if (err)
 602                                         goto done;
 603                                 ntheirs++;
 604                         }
 605                 }
 606         }
 607
 608         /* Account for any new references we are going to upload. */
 609         TAILQ_FOREACH(pe, &have_refs, entry) {
 610                 const char *refname = pe->path;
 611                 if (find_ref(&their_refs, refname) == NULL)
 612                         refs_to_send++;
 613         }
 614
 615         /* Account for any existing references we are going to delete. */
 616         TAILQ_FOREACH(pe, delete_branches, entry) {
 617                 const char *branchname = pe->path;
 618                 if (find_ref(&their_refs, branchname))
 619                         refs_to_delete++;
 620         }
 621
 622         if (refs_to_send == 0 && refs_to_delete == 0) {
 623                 got_privsep_send_stop(imsg_sendfds[0]);
 624                 goto done;
 625         }
 626
 627         if (refs_to_send > 0) {
 628                 struct got_ratelimit rl;
 629                 got_ratelimit_init(&rl, 0, 500);
 630                 memset(&ppa, 0, sizeof(ppa));
 631                 ppa.progress_cb = progress_cb;
 632                 ppa.progress_arg = progress_arg;
 633                 ppa.sendfd = sendfd;
 634                 err = got_pack_create(&packhash, packfd, delta_cache,
 635                     their_ids, ntheirs, our_ids, nours, repo, 0, 1, 0,
 636                     pack_progress, &ppa, &rl, cancel_cb, cancel_arg);
 637                 if (err)
 638                         goto done;
 639
 640                 npackfd = dup(packfd);
 641                 if (npackfd == -1) {
 642                         err = got_error_from_errno("dup");
 643                         goto done;
 644                 }
 645                 err = got_privsep_send_packfd(&sendibuf, npackfd);
 646                 if (err != NULL)
 647                         goto done;
 648                 npackfd = -1;
 649         } else {
 650                 err = got_privsep_send_packfd(&sendibuf, -1);
 651                 if (err != NULL)
 652                         goto done;
 653         }
 654
 655         while (!done) {
 656                 int success = 0;
 657                 char *refname = NULL;
 658                 char *errmsg = NULL;
 659
 660                 if (cancel_cb) {
 661                         err = (*cancel_cb)(cancel_arg);
 662                         if (err)
 663                                 goto done;
 664                 }
 665                 err = got_privsep_recv_send_progress(&done, &bytes_sent,
 666                     &success, &refname, &errmsg, &sendibuf);
 667                 if (err)
 668                         goto done;
 669                 if (refname && got_ref_name_is_valid(refname) && success &&
 670                     strncmp(refname, "refs/tags/", 10) != 0) {
 671                         struct got_pathlist_entry *my_ref;
 672                         /*
 673                          * The server has accepted our changes.
 674                          * Update our reference in refs/remotes/ accordingly.
 675                          */
 676                         my_ref = find_ref(&have_refs, refname);
 677                         if (my_ref) {
 678                                 err = update_remote_ref(my_ref, remote_name,
 679                                     repo);
 680                                 if (err)
 681                                         goto done;
 682                         }
 683                 }
 684                 if (refname != NULL ||
 685                     bytes_sent_cur != bytes_sent) {
 686                         err = progress_cb(progress_arg, ppa.ncolored,
 687                             ppa.nfound, ppa.ntrees, ppa.packfile_size,
 688                             ppa.ncommits, ppa.nobj_total, ppa.nobj_deltify,
 689                             ppa.nobj_written, bytes_sent,
 690                             refname, errmsg, success);
 691                         if (err) {
 692                                 free(refname);
 693                                 free(errmsg);
 694                                 goto done;
 695                         }
 696                         bytes_sent_cur = bytes_sent;
 697                 }
 698                 free(refname);
 699                 free(errmsg);
 700         }
 701 done:
 702         if (sendpid != -1) {
 703                 if (err)
 704                         got_privsep_send_stop(imsg_sendfds[0]);
 705                 if (waitpid(sendpid, &sendstatus, 0) == -1 && err == NULL)
 706                         err = got_error_from_errno("waitpid");
 707         }
 708         if (imsg_sendfds[0] != -1 && close(imsg_sendfds[0]) == -1 && err == NULL)
 709                 err = got_error_from_errno("close");
 710         if (imsg_sendfds[1] != -1 && close(imsg_sendfds[1]) == -1 && err == NULL)
 711                 err = got_error_from_errno("close");
 712         if (packfd != -1 && close(packfd) == -1 && err == NULL)
 713                 err = got_error_from_errno("close");
 714         if (delta_cache && fclose(delta_cache) == EOF && err == NULL)
 715                 err = got_error_from_errno("fclose");
 716         if (nsendfd != -1 && close(nsendfd) == -1 && err == NULL)
 717                 err = got_error_from_errno("close");
 718         if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
 719                 err = got_error_from_errno("close");
 720
 721         got_pathlist_free(&have_refs, GOT_PATHLIST_FREE_ALL);
 722         got_pathlist_free(&their_refs, GOT_PATHLIST_FREE_ALL);
 723         /*
 724          * Object ids are owned by have_refs/their_refs and are already freed;
 725          * Only the arrays must be freed.
 726          */
 727         free(our_ids);
 728         free(their_ids);
 729         free(s);
 730         return err;
 731 }