2 * Copyright (c) 2018, 2019 Ori Bernstein <ori@openbsd.org>
3 * Copyright (c) 2021 Stefan Sperling <stsp@openbsd.org>
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.
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.
18 #include <sys/types.h>
20 #include <sys/queue.h>
23 #include <sys/socket.h>
25 #include <sys/resource.h>
26 #include <sys/socket.h>
45 #include "got_error.h"
46 #include "got_reference.h"
47 #include "got_repository.h"
49 #include "got_cancel.h"
50 #include "got_worktree.h"
51 #include "got_object.h"
52 #include "got_opentemp.h"
54 #include "got_repository_admin.h"
55 #include "got_commit_graph.h"
57 #include "got_lib_delta.h"
58 #include "got_lib_inflate.h"
59 #include "got_lib_object.h"
60 #include "got_lib_object_parse.h"
61 #include "got_lib_object_create.h"
62 #include "got_lib_pack.h"
63 #include "got_lib_sha1.h"
64 #include "got_lib_privsep.h"
65 #include "got_lib_object_cache.h"
66 #include "got_lib_repository.h"
67 #include "got_lib_ratelimit.h"
68 #include "got_lib_pack_create.h"
69 #include "got_lib_dial.h"
72 #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
76 #define ssizeof(_x) ((ssize_t)(sizeof(_x)))
80 #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
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)
87 const struct got_error *err = NULL;
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_DIRECTION_SEND, verbosity);
95 else if (strcmp(proto, "git") == 0)
96 err = got_dial_git(sendfd, host, port, server_path,
97 GOT_DIAL_DIRECTION_SEND);
98 else if (strcmp(proto, "http") == 0 || strcmp(proto, "git+http") == 0)
99 err = got_error_path(proto, GOT_ERR_NOT_IMPL);
101 err = got_error_path(proto, GOT_ERR_BAD_PROTO);
105 struct pack_progress_arg {
106 got_send_progress_cb progress_cb;
119 static const struct got_error *
120 pack_progress(void *arg, int ncolored, int nfound, int ntrees,
121 off_t packfile_size, int ncommits, int nobj_total, int nobj_deltify,
124 const struct got_error *err;
125 struct pack_progress_arg *a = arg;
127 err = a->progress_cb(a->progress_arg, ncolored, nfound, ntrees,
128 packfile_size, ncommits, nobj_total, nobj_deltify,
129 nobj_written, 0, NULL, NULL, 0);
133 a->ncolored= ncolored;
136 a->packfile_size = packfile_size;
137 a->ncommits = ncommits;
138 a->nobj_total = nobj_total;
139 a->nobj_deltify = nobj_deltify;
140 a->nobj_written = nobj_written;
144 static const struct got_error *
145 insert_ref(struct got_reflist_head *refs, const char *refname,
146 struct got_repository *repo)
148 const struct got_error *err;
149 struct got_reference *ref;
150 struct got_reflist_entry *new;
152 err = got_ref_open(&ref, repo, refname, 0);
156 err = got_reflist_insert(&new, refs, ref, got_ref_cmp_by_name, NULL);
157 if (err || new == NULL /* duplicate */)
163 static const struct got_error *
164 check_linear_ancestry(const char *refname, struct got_object_id *my_id,
165 struct got_object_id *their_id, struct got_repository *repo,
166 got_cancel_cb cancel_cb, void *cancel_arg)
168 const struct got_error *err = NULL;
169 struct got_object_id *yca_id;
172 err = got_object_get_type(&obj_type, repo, their_id);
175 if (obj_type != GOT_OBJ_TYPE_COMMIT)
176 return got_error_fmt(GOT_ERR_OBJ_TYPE,
177 "bad object type on server for %s", refname);
179 err = got_commit_graph_find_youngest_common_ancestor(&yca_id,
180 my_id, their_id, 1, repo, cancel_cb, cancel_arg);
184 return got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
187 * Require a straight line of history between the two commits,
188 * with their commit being older than my commit.
190 * Non-linear situations such as this require a rebase:
192 * (theirs) D F (mine)
200 if (got_object_id_cmp(their_id, yca_id) != 0)
201 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
207 static const struct got_error *
208 realloc_ids(struct got_object_id ***ids, size_t *nalloc, size_t n)
210 struct got_object_id **new;
211 const size_t alloc_chunksz = 256;
216 new = recallocarray(*ids, *nalloc, *nalloc + alloc_chunksz,
217 sizeof(struct got_object_id));
219 return got_error_from_errno("recallocarray");
222 *nalloc += alloc_chunksz;
226 static struct got_reference *
227 find_ref(struct got_reflist_head *refs, const char *refname)
229 struct got_reflist_entry *re;
231 TAILQ_FOREACH(re, refs, entry) {
232 if (got_path_cmp(got_ref_get_name(re->ref), refname,
233 strlen(got_ref_get_name(re->ref)),
234 strlen(refname)) == 0) {
242 static struct got_pathlist_entry *
243 find_their_ref(struct got_pathlist_head *their_refs, const char *refname)
245 struct got_pathlist_entry *pe;
247 TAILQ_FOREACH(pe, their_refs, entry) {
248 const char *their_refname = pe->path;
249 if (got_path_cmp(their_refname, refname,
250 strlen(their_refname), strlen(refname)) == 0) {
258 static const struct got_error *
259 get_remote_refname(char **remote_refname, const char *remote_name,
262 if (strncmp(refname, "refs/", 5) == 0)
264 if (strncmp(refname, "heads/", 6) == 0)
267 if (asprintf(remote_refname, "refs/remotes/%s/%s",
268 remote_name, refname) == -1)
269 return got_error_from_errno("asprintf");
274 static const struct got_error *
275 update_remote_ref(struct got_reference *my_ref, const char *remote_name,
276 struct got_repository *repo)
278 const struct got_error *err, *unlock_err;
279 struct got_object_id *my_id;
280 struct got_reference *ref = NULL;
281 char *remote_refname = NULL;
284 err = got_ref_resolve(&my_id, repo, my_ref);
288 err = get_remote_refname(&remote_refname, remote_name,
289 got_ref_get_name(my_ref));
293 err = got_ref_open(&ref, repo, remote_refname, 1 /* lock */);
295 if (err->code != GOT_ERR_NOT_REF)
297 err = got_ref_alloc(&ref, remote_refname, my_id);
302 err = got_ref_change_ref(ref, my_id);
307 err = got_ref_write(ref, repo);
311 unlock_err = got_ref_unlock(ref);
312 if (unlock_err && err == NULL)
318 free(remote_refname);
322 const struct got_error*
323 got_send_pack(const char *remote_name, struct got_pathlist_head *branch_names,
324 struct got_pathlist_head *tag_names,
325 struct got_pathlist_head *delete_branches,
326 int verbosity, int overwrite_refs, int sendfd,
327 struct got_repository *repo, got_send_progress_cb progress_cb,
328 void *progress_arg, got_cancel_cb cancel_cb, void *cancel_arg)
331 int npackfd = -1, nsendfd = -1;
332 int sendstatus, done = 0;
333 const struct got_error *err;
334 struct imsgbuf sendibuf;
336 struct got_reflist_head refs;
337 struct got_pathlist_head have_refs;
338 struct got_pathlist_head their_refs;
339 struct got_pathlist_entry *pe;
340 struct got_reflist_entry *re;
341 struct got_object_id **our_ids = NULL;
342 struct got_object_id **their_ids = NULL;
343 int i, nours = 0, ntheirs = 0;
344 size_t nalloc_ours = 0, nalloc_theirs = 0;
345 int refs_to_send = 0, refs_to_delete = 0;
346 off_t bytes_sent = 0, bytes_sent_cur = 0;
347 struct pack_progress_arg ppa;
348 uint8_t packsha1[SHA1_DIGEST_LENGTH];
350 FILE *delta_cache = NULL;
353 TAILQ_INIT(&have_refs);
354 TAILQ_INIT(&their_refs);
356 TAILQ_FOREACH(pe, branch_names, entry) {
357 const char *branchname = pe->path;
358 if (strncmp(branchname, "refs/heads/", 11) != 0) {
360 if (asprintf(&s, "refs/heads/%s", branchname) == -1) {
361 err = got_error_from_errno("asprintf");
364 err = insert_ref(&refs, s, repo);
367 err = insert_ref(&refs, branchname, repo);
373 TAILQ_FOREACH(pe, delete_branches, entry) {
374 const char *branchname = pe->path;
375 struct got_reference *ref;
376 if (strncmp(branchname, "refs/heads/", 11) != 0) {
377 err = got_error_fmt(GOT_ERR_SEND_DELETE_REF, "%s",
381 ref = find_ref(&refs, branchname);
383 err = got_error_fmt(GOT_ERR_SEND_DELETE_REF,
384 "changes on %s will be sent to server",
390 TAILQ_FOREACH(pe, tag_names, entry) {
391 const char *tagname = pe->path;
392 if (strncmp(tagname, "refs/tags/", 10) != 0) {
394 if (asprintf(&s, "refs/tags/%s", tagname) == -1) {
395 err = got_error_from_errno("asprintf");
398 err = insert_ref(&refs, s, repo);
401 err = insert_ref(&refs, tagname, repo);
407 if (TAILQ_EMPTY(&refs) && TAILQ_EMPTY(delete_branches)) {
408 err = got_error(GOT_ERR_SEND_EMPTY);
412 TAILQ_FOREACH(re, &refs, entry) {
413 struct got_object_id *id;
416 if (got_ref_is_symbolic(re->ref)) {
417 err = got_error_fmt(GOT_ERR_BAD_REF_TYPE,
418 "cannot send symbolic reference %s",
419 got_ref_get_name(re->ref));
423 err = got_ref_resolve(&id, repo, re->ref);
426 err = got_object_get_type(&obj_type, repo, id);
431 case GOT_OBJ_TYPE_COMMIT:
432 case GOT_OBJ_TYPE_TAG:
435 err = got_error_fmt(GOT_ERR_OBJ_TYPE,
436 "cannot send %s", got_ref_get_name(re->ref));
441 packfd = got_opentempfd();
443 err = got_error_from_errno("got_opentempfd");
447 delta_cache = got_opentemp();
448 if (delta_cache == NULL) {
449 err = got_error_from_errno("got_opentemp");
453 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_sendfds) == -1) {
454 err = got_error_from_errno("socketpair");
460 err = got_error_from_errno("fork");
462 } else if (sendpid == 0){
463 got_privsep_exec_child(imsg_sendfds,
464 GOT_PATH_PROG_SEND_PACK, got_repo_get_path(repo));
467 if (close(imsg_sendfds[1]) == -1) {
468 err = got_error_from_errno("close");
471 imsg_init(&sendibuf, imsg_sendfds[0]);
472 nsendfd = dup(sendfd);
474 err = got_error_from_errno("dup");
479 * Convert reflist to pathlist since the privsep layer
480 * is linked into helper programs which lack reference.c.
482 TAILQ_FOREACH(re, &refs, entry) {
483 struct got_object_id *id;
484 err = got_ref_resolve(&id, repo, re->ref);
487 err = got_pathlist_append(&have_refs,
488 got_ref_get_name(re->ref), id);
492 * Also prepare the array of our object IDs which
493 * will be needed for generating a pack file.
495 err = realloc_ids(&our_ids, &nalloc_ours, nours + 1);
502 err = got_privsep_send_send_req(&sendibuf, nsendfd, &have_refs,
503 delete_branches, verbosity);
508 err = got_privsep_recv_send_remote_refs(&their_refs, &sendibuf);
513 * Process references reported by the server.
514 * Push appropriate object IDs onto the "their IDs" array.
515 * This array will be used to exclude objects which already
516 * exist on the server from our pack file.
518 TAILQ_FOREACH(pe, &their_refs, entry) {
519 const char *refname = pe->path;
520 struct got_object_id *their_id = pe->data;
522 struct got_object *obj;
523 struct got_reference *my_ref = NULL;
526 /* Don't blindly trust the server to send us valid names. */
527 if (!got_ref_name_is_valid(refname))
530 if (strncmp(refname, "refs/tags/", 10) == 0)
533 * Find out whether this is a reference we want to upload.
534 * Otherwise we can still use this reference as a hint to
535 * avoid uploading any objects the server already has.
537 my_ref = find_ref(&refs, refname);
539 struct got_object_id *my_id;
540 err = got_ref_resolve(&my_id, repo, my_ref);
543 if (got_object_id_cmp(my_id, their_id) != 0) {
544 if (!overwrite_refs && is_tag) {
546 GOT_ERR_SEND_TAG_EXISTS,
556 /* Check if their object exists locally. */
557 err = got_object_open(&obj, repo, their_id);
559 if (err->code != GOT_ERR_NO_OBJ)
561 if (!overwrite_refs && my_ref != NULL) {
562 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY,
568 got_object_close(obj);
572 err = realloc_ids(&their_ids, &nalloc_theirs, ntheirs + 1);
577 /* Enforce linear ancestry if required. */
578 if (!overwrite_refs && my_ref && !is_tag) {
579 struct got_object_id *my_id;
580 err = got_ref_resolve(&my_id, repo, my_ref);
583 err = check_linear_ancestry(refname, my_id,
584 their_id, repo, cancel_cb, cancel_arg);
590 /* Exclude any objects reachable via their ID. */
591 their_ids[ntheirs] = got_object_id_dup(their_id);
592 if (their_ids[ntheirs] == NULL) {
593 err = got_error_from_errno("got_object_id_dup");
597 } else if (!is_tag) {
598 char *remote_refname;
599 struct got_reference *ref;
601 * Exclude any objects which exist on the server
602 * according to a locally cached remote reference.
604 err = get_remote_refname(&remote_refname,
605 remote_name, refname);
608 err = got_ref_open(&ref, repo, remote_refname, 0);
609 free(remote_refname);
611 if (err->code != GOT_ERR_NOT_REF)
614 err = got_ref_resolve(&their_ids[ntheirs],
624 /* Account for any new references we are going to upload. */
625 TAILQ_FOREACH(re, &refs, entry) {
626 if (find_their_ref(&their_refs,
627 got_ref_get_name(re->ref)) == NULL)
631 /* Account for any existing references we are going to delete. */
632 TAILQ_FOREACH(pe, delete_branches, entry) {
633 const char *branchname = pe->path;
634 if (find_their_ref(&their_refs, branchname))
638 if (refs_to_send == 0 && refs_to_delete == 0) {
639 got_privsep_send_stop(imsg_sendfds[0]);
643 if (refs_to_send > 0) {
644 struct got_ratelimit rl;
645 got_ratelimit_init(&rl, 0, 500);
646 memset(&ppa, 0, sizeof(ppa));
647 ppa.progress_cb = progress_cb;
648 ppa.progress_arg = progress_arg;
649 err = got_pack_create(packsha1, packfd, delta_cache,
650 their_ids, ntheirs, our_ids, nours, repo, 0, 1,
651 pack_progress, &ppa, &rl, cancel_cb, cancel_arg);
655 npackfd = dup(packfd);
657 err = got_error_from_errno("dup");
660 err = got_privsep_send_packfd(&sendibuf, npackfd);
665 err = got_privsep_send_packfd(&sendibuf, -1);
672 char *refname = NULL;
676 err = (*cancel_cb)(cancel_arg);
680 err = got_privsep_recv_send_progress(&done, &bytes_sent,
681 &success, &refname, &errmsg, &sendibuf);
684 if (refname && got_ref_name_is_valid(refname) && success &&
685 strncmp(refname, "refs/tags/", 10) != 0) {
686 struct got_reference *my_ref;
688 * The server has accepted our changes.
689 * Update our reference in refs/remotes/ accordingly.
691 my_ref = find_ref(&refs, refname);
693 err = update_remote_ref(my_ref, remote_name,
699 if (refname != NULL ||
700 bytes_sent_cur != bytes_sent) {
701 err = progress_cb(progress_arg, ppa.ncolored,
702 ppa.nfound, ppa.ntrees, ppa.packfile_size,
703 ppa.ncommits, ppa.nobj_total, ppa.nobj_deltify,
704 ppa.nobj_written, bytes_sent,
705 refname, errmsg, success);
711 bytes_sent_cur = bytes_sent;
719 got_privsep_send_stop(imsg_sendfds[0]);
720 if (waitpid(sendpid, &sendstatus, 0) == -1 && err == NULL)
721 err = got_error_from_errno("waitpid");
723 if (packfd != -1 && close(packfd) == -1 && err == NULL)
724 err = got_error_from_errno("close");
725 if (delta_cache && fclose(delta_cache) == EOF && err == NULL)
726 err = got_error_from_errno("fclose");
727 if (nsendfd != -1 && close(nsendfd) == -1 && err == NULL)
728 err = got_error_from_errno("close");
729 if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
730 err = got_error_from_errno("close");
732 got_ref_list_free(&refs);
733 got_pathlist_free(&have_refs);
734 got_pathlist_free(&their_refs);
735 for (i = 0; i < nours; i++)
738 for (i = 0; i < ntheirs; i++)