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>
22 #include <sys/socket.h>
24 #include <sys/resource.h>
25 #include <sys/socket.h>
40 #include "got_error.h"
41 #include "got_reference.h"
42 #include "got_repository.h"
44 #include "got_cancel.h"
45 #include "got_worktree.h"
46 #include "got_object.h"
47 #include "got_opentemp.h"
49 #include "got_repository_admin.h"
50 #include "got_commit_graph.h"
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"
67 #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
71 #define ssizeof(_x) ((ssize_t)(sizeof(_x)))
75 #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
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)
82 const struct got_error *err = NULL;
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);
96 err = got_error_path(proto, GOT_ERR_BAD_PROTO);
100 struct pack_progress_arg {
101 got_send_progress_cb progress_cb;
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,
119 const struct got_error *err;
120 struct pack_progress_arg *a = arg;
122 err = a->progress_cb(a->progress_arg, ncolored, nfound, ntrees,
123 packfile_size, ncommits, nobj_total, nobj_deltify,
124 nobj_written, 0, NULL, NULL, 0);
128 a->ncolored= ncolored;
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;
139 static const struct got_error *
140 insert_ref(struct got_reflist_head *refs, const char *refname,
141 struct got_repository *repo)
143 const struct got_error *err;
144 struct got_reference *ref;
145 struct got_reflist_entry *new;
147 err = got_ref_open(&ref, repo, refname, 0);
151 err = got_reflist_insert(&new, refs, ref, got_ref_cmp_by_name, NULL);
152 if (err || new == NULL /* duplicate */)
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)
163 const struct got_error *err = NULL;
164 struct got_object_id *yca_id;
167 err = got_object_get_type(&obj_type, repo, their_id);
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);
174 err = got_commit_graph_find_youngest_common_ancestor(&yca_id,
175 my_id, their_id, 1, repo, cancel_cb, cancel_arg);
179 return got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
182 * Require a straight line of history between the two commits,
183 * with their commit being older than my commit.
185 * Non-linear situations such as this require a rebase:
187 * (theirs) D F (mine)
195 if (got_object_id_cmp(their_id, yca_id) != 0)
196 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
202 static const struct got_error *
203 realloc_ids(struct got_object_id ***ids, size_t *nalloc, size_t n)
205 struct got_object_id **new;
206 const size_t alloc_chunksz = 256;
211 new = recallocarray(*ids, *nalloc, *nalloc + alloc_chunksz,
212 sizeof(struct got_object_id));
214 return got_error_from_errno("recallocarray");
217 *nalloc += alloc_chunksz;
221 static struct got_reference *
222 find_ref(struct got_reflist_head *refs, const char *refname)
224 struct got_reflist_entry *re;
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) {
237 static struct got_pathlist_entry *
238 find_their_ref(struct got_pathlist_head *their_refs, const char *refname)
240 struct got_pathlist_entry *pe;
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) {
253 static const struct got_error *
254 get_remote_refname(char **remote_refname, const char *remote_name,
257 if (strncmp(refname, "refs/", 5) == 0)
259 if (strncmp(refname, "heads/", 6) == 0)
262 if (asprintf(remote_refname, "refs/remotes/%s/%s",
263 remote_name, refname) == -1)
264 return got_error_from_errno("asprintf");
269 static const struct got_error *
270 update_remote_ref(struct got_reference *my_ref, const char *remote_name,
271 struct got_repository *repo)
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;
279 err = got_ref_resolve(&my_id, repo, my_ref);
283 err = get_remote_refname(&remote_refname, remote_name,
284 got_ref_get_name(my_ref));
288 err = got_ref_open(&ref, repo, remote_refname, 1 /* lock */);
290 if (err->code != GOT_ERR_NOT_REF)
292 err = got_ref_alloc(&ref, remote_refname, my_id);
297 err = got_ref_change_ref(ref, my_id);
302 err = got_ref_write(ref, repo);
306 unlock_err = got_ref_unlock(ref);
307 if (unlock_err && err == NULL)
313 free(remote_refname);
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)
326 int npackfd = -1, nsendfd = -1;
327 int sendstatus, done = 0;
328 const struct got_error *err;
329 struct imsgbuf sendibuf;
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];
345 FILE *delta_cache = NULL;
348 TAILQ_INIT(&have_refs);
349 TAILQ_INIT(&their_refs);
351 TAILQ_FOREACH(pe, branch_names, entry) {
352 const char *branchname = pe->path;
353 if (strncmp(branchname, "refs/heads/", 11) != 0) {
355 if (asprintf(&s, "refs/heads/%s", branchname) == -1) {
356 err = got_error_from_errno("asprintf");
359 err = insert_ref(&refs, s, repo);
362 err = insert_ref(&refs, branchname, repo);
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",
376 ref = find_ref(&refs, branchname);
378 err = got_error_fmt(GOT_ERR_SEND_DELETE_REF,
379 "changes on %s will be sent to server",
385 TAILQ_FOREACH(pe, tag_names, entry) {
386 const char *tagname = pe->path;
387 if (strncmp(tagname, "refs/tags/", 10) != 0) {
389 if (asprintf(&s, "refs/tags/%s", tagname) == -1) {
390 err = got_error_from_errno("asprintf");
393 err = insert_ref(&refs, s, repo);
396 err = insert_ref(&refs, tagname, repo);
402 if (TAILQ_EMPTY(&refs) && TAILQ_EMPTY(delete_branches)) {
403 err = got_error(GOT_ERR_SEND_EMPTY);
407 TAILQ_FOREACH(re, &refs, entry) {
408 struct got_object_id *id;
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));
418 err = got_ref_resolve(&id, repo, re->ref);
421 err = got_object_get_type(&obj_type, repo, id);
426 case GOT_OBJ_TYPE_COMMIT:
427 case GOT_OBJ_TYPE_TAG:
430 err = got_error_fmt(GOT_ERR_OBJ_TYPE,
431 "cannot send %s", got_ref_get_name(re->ref));
436 packfd = got_opentempfd();
438 err = got_error_from_errno("got_opentempfd");
442 delta_cache = got_opentemp();
443 if (delta_cache == NULL) {
444 err = got_error_from_errno("got_opentemp");
448 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_sendfds) == -1) {
449 err = got_error_from_errno("socketpair");
455 err = got_error_from_errno("fork");
457 } else if (sendpid == 0){
458 got_privsep_exec_child(imsg_sendfds,
459 GOT_PATH_PROG_SEND_PACK, got_repo_get_path(repo));
462 if (close(imsg_sendfds[1]) == -1) {
463 err = got_error_from_errno("close");
466 imsg_init(&sendibuf, imsg_sendfds[0]);
467 nsendfd = dup(sendfd);
469 err = got_error_from_errno("dup");
474 * Convert reflist to pathlist since the privsep layer
475 * is linked into helper programs which lack reference.c.
477 TAILQ_FOREACH(re, &refs, entry) {
478 struct got_object_id *id;
479 err = got_ref_resolve(&id, repo, re->ref);
482 err = got_pathlist_append(&have_refs,
483 got_ref_get_name(re->ref), id);
487 * Also prepare the array of our object IDs which
488 * will be needed for generating a pack file.
490 err = realloc_ids(&our_ids, &nalloc_ours, nours + 1);
497 err = got_privsep_send_send_req(&sendibuf, nsendfd, &have_refs,
498 delete_branches, verbosity);
503 err = got_privsep_recv_send_remote_refs(&their_refs, &sendibuf);
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.
513 TAILQ_FOREACH(pe, &their_refs, entry) {
514 const char *refname = pe->path;
515 struct got_object_id *their_id = pe->data;
517 struct got_object *obj;
518 struct got_reference *my_ref = NULL;
521 /* Don't blindly trust the server to send us valid names. */
522 if (!got_ref_name_is_valid(refname))
525 if (strncmp(refname, "refs/tags/", 10) == 0)
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.
532 my_ref = find_ref(&refs, refname);
534 struct got_object_id *my_id;
535 err = got_ref_resolve(&my_id, repo, my_ref);
538 if (got_object_id_cmp(my_id, their_id) != 0) {
539 if (!overwrite_refs && is_tag) {
541 GOT_ERR_SEND_TAG_EXISTS,
551 /* Check if their object exists locally. */
552 err = got_object_open(&obj, repo, their_id);
554 if (err->code != GOT_ERR_NO_OBJ)
556 if (!overwrite_refs && my_ref != NULL) {
557 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY,
563 got_object_close(obj);
567 err = realloc_ids(&their_ids, &nalloc_theirs, ntheirs + 1);
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);
578 err = check_linear_ancestry(refname, my_id,
579 their_id, repo, cancel_cb, cancel_arg);
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");
592 } else if (!is_tag) {
593 char *remote_refname;
594 struct got_reference *ref;
596 * Exclude any objects which exist on the server
597 * according to a locally cached remote reference.
599 err = get_remote_refname(&remote_refname,
600 remote_name, refname);
603 err = got_ref_open(&ref, repo, remote_refname, 0);
604 free(remote_refname);
606 if (err->code != GOT_ERR_NOT_REF)
609 err = got_ref_resolve(&their_ids[ntheirs],
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)
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))
633 if (refs_to_send == 0 && refs_to_delete == 0) {
634 got_privsep_send_stop(imsg_sendfds[0]);
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);
650 npackfd = dup(packfd);
652 err = got_error_from_errno("dup");
655 err = got_privsep_send_packfd(&sendibuf, npackfd);
660 err = got_privsep_send_packfd(&sendibuf, -1);
667 char *refname = NULL;
671 err = (*cancel_cb)(cancel_arg);
675 err = got_privsep_recv_send_progress(&done, &bytes_sent,
676 &success, &refname, &errmsg, &sendibuf);
679 if (refname && got_ref_name_is_valid(refname) && success &&
680 strncmp(refname, "refs/tags/", 10) != 0) {
681 struct got_reference *my_ref;
683 * The server has accepted our changes.
684 * Update our reference in refs/remotes/ accordingly.
686 my_ref = find_ref(&refs, refname);
688 err = update_remote_ref(my_ref, remote_name,
694 if (refname != NULL ||
695 bytes_sent_cur != bytes_sent) {
696 err = progress_cb(progress_arg, ppa.ncolored,
697 ppa.nfound, ppa.ntrees, ppa.packfile_size,
698 ppa.ncommits, ppa.nobj_total, ppa.nobj_deltify,
699 ppa.nobj_written, bytes_sent,
700 refname, errmsg, success);
706 bytes_sent_cur = bytes_sent;
714 got_privsep_send_stop(imsg_sendfds[0]);
715 if (waitpid(sendpid, &sendstatus, 0) == -1 && err == NULL)
716 err = got_error_from_errno("waitpid");
718 if (packfd != -1 && close(packfd) == -1 && err == NULL)
719 err = got_error_from_errno("close");
720 if (delta_cache && fclose(delta_cache) == EOF && err == NULL)
721 err = got_error_from_errno("fclose");
722 if (nsendfd != -1 && close(nsendfd) == -1 && err == NULL)
723 err = got_error_from_errno("close");
724 if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
725 err = got_error_from_errno("close");
727 got_ref_list_free(&refs);
728 got_pathlist_free(&have_refs, GOT_PATHLIST_FREE_NONE);
729 got_pathlist_free(&their_refs, GOT_PATHLIST_FREE_NONE);
730 for (i = 0; i < nours; i++)
733 for (i = 0; i < ntheirs; i++)