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_pack_create.h"
68 #include "got_lib_dial.h"
71 #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
75 #define ssizeof(_x) ((ssize_t)(sizeof(_x)))
79 #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
82 const struct got_error *
83 got_send_connect(pid_t *sendpid, int *sendfd, const char *proto,
84 const char *host, const char *port, const char *server_path, int verbosity)
86 const struct got_error *err = NULL;
91 if (strcmp(proto, "ssh") == 0 || strcmp(proto, "git+ssh") == 0)
92 err = got_dial_ssh(sendpid, sendfd, host, port, server_path,
93 GOT_DIAL_DIRECTION_SEND, verbosity);
94 else if (strcmp(proto, "git") == 0)
95 err = got_dial_git(sendfd, host, port, server_path,
96 GOT_DIAL_DIRECTION_SEND);
97 else if (strcmp(proto, "http") == 0 || strcmp(proto, "git+http") == 0)
98 err = got_error_path(proto, GOT_ERR_NOT_IMPL);
100 err = got_error_path(proto, GOT_ERR_BAD_PROTO);
104 struct pack_progress_arg {
105 got_send_progress_cb progress_cb;
118 static const struct got_error *
119 pack_progress(void *arg, int ncolored, int nfound, int ntrees,
120 off_t packfile_size, int ncommits, int nobj_total, int nobj_deltify,
123 const struct got_error *err;
124 struct pack_progress_arg *a = arg;
126 err = a->progress_cb(a->progress_arg, ncolored, nfound, ntrees,
127 packfile_size, ncommits, nobj_total, nobj_deltify,
128 nobj_written, 0, NULL, 0);
132 a->ncolored= ncolored;
135 a->packfile_size = packfile_size;
136 a->ncommits = ncommits;
137 a->nobj_total = nobj_total;
138 a->nobj_deltify = nobj_deltify;
139 a->nobj_written = nobj_written;
143 static const struct got_error *
144 insert_ref(struct got_reflist_head *refs, const char *refname,
145 struct got_repository *repo)
147 const struct got_error *err;
148 struct got_reference *ref;
149 struct got_reflist_entry *new;
151 err = got_ref_open(&ref, repo, refname, 0);
155 err = got_reflist_insert(&new, refs, ref, got_ref_cmp_by_name, NULL);
156 if (err || new == NULL /* duplicate */)
162 static const struct got_error *
163 check_linear_ancestry(const char *refname, struct got_object_id *my_id,
164 struct got_object_id *their_id, struct got_repository *repo,
165 got_cancel_cb cancel_cb, void *cancel_arg)
167 const struct got_error *err = NULL;
168 struct got_object_id *yca_id;
171 err = got_object_get_type(&obj_type, repo, their_id);
174 if (obj_type != GOT_OBJ_TYPE_COMMIT)
175 return got_error_fmt(GOT_ERR_OBJ_TYPE,
176 "bad object type on server for %s", refname);
178 err = got_commit_graph_find_youngest_common_ancestor(&yca_id,
179 my_id, their_id, 1, repo, cancel_cb, cancel_arg);
183 return got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
186 * Require a straight line of history between the two commits,
187 * with their commit being older than my commit.
189 * Non-linear situations such as this require a rebase:
191 * (theirs) D F (mine)
199 if (got_object_id_cmp(their_id, yca_id) != 0)
200 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
206 static const struct got_error *
207 realloc_ids(struct got_object_id ***ids, size_t *nalloc, size_t n)
209 struct got_object_id **new;
210 const size_t alloc_chunksz = 256;
215 new = recallocarray(*ids, *nalloc, *nalloc + alloc_chunksz,
216 sizeof(struct got_object_id));
218 return got_error_from_errno("recallocarray");
221 *nalloc += alloc_chunksz;
225 static struct got_reference *
226 find_ref(struct got_reflist_head *refs, const char *refname)
228 struct got_reflist_entry *re;
230 TAILQ_FOREACH(re, refs, entry) {
231 if (got_path_cmp(got_ref_get_name(re->ref), refname,
232 strlen(got_ref_get_name(re->ref)),
233 strlen(refname)) == 0) {
241 static struct got_pathlist_entry *
242 find_their_ref(struct got_pathlist_head *their_refs, const char *refname)
244 struct got_pathlist_entry *pe;
246 TAILQ_FOREACH(pe, their_refs, entry) {
247 const char *their_refname = pe->path;
248 if (got_path_cmp(their_refname, refname,
249 strlen(their_refname), strlen(refname)) == 0) {
257 static const struct got_error *
258 get_remote_refname(char **remote_refname, const char *remote_name,
261 if (strncmp(refname, "refs/", 5) == 0)
263 if (strncmp(refname, "heads/", 6) == 0)
266 if (asprintf(remote_refname, "refs/remotes/%s/%s",
267 remote_name, refname) == -1)
268 return got_error_from_errno("asprintf");
273 static const struct got_error *
274 update_remote_ref(struct got_reference *my_ref, const char *remote_name,
275 struct got_repository *repo)
277 const struct got_error *err, *unlock_err;
278 struct got_object_id *my_id;
279 struct got_reference *ref = NULL;
280 char *remote_refname = NULL;
283 err = got_ref_resolve(&my_id, repo, my_ref);
287 err = get_remote_refname(&remote_refname, remote_name,
288 got_ref_get_name(my_ref));
292 err = got_ref_open(&ref, repo, remote_refname, 1 /* lock */);
294 if (err->code != GOT_ERR_NOT_REF)
296 err = got_ref_alloc(&ref, remote_refname, my_id);
301 err = got_ref_change_ref(ref, my_id);
306 err = got_ref_write(ref, repo);
310 unlock_err = got_ref_unlock(ref);
311 if (unlock_err && err == NULL)
317 free(remote_refname);
321 const struct got_error*
322 got_send_pack(const char *remote_name, struct got_pathlist_head *branch_names,
323 struct got_pathlist_head *tag_names,
324 struct got_pathlist_head *delete_branches,
325 int verbosity, int overwrite_refs, int sendfd,
326 struct got_repository *repo, got_send_progress_cb progress_cb,
327 void *progress_arg, got_cancel_cb cancel_cb, void *cancel_arg)
330 int npackfd = -1, nsendfd = -1;
331 int sendstatus, done = 0;
332 const struct got_error *err;
333 struct imsgbuf sendibuf;
335 struct got_reflist_head refs;
336 struct got_pathlist_head have_refs;
337 struct got_pathlist_head their_refs;
338 struct got_pathlist_entry *pe;
339 struct got_reflist_entry *re;
340 struct got_object_id **our_ids = NULL;
341 struct got_object_id **their_ids = NULL;
342 int i, nours = 0, ntheirs = 0;
343 size_t nalloc_ours = 0, nalloc_theirs = 0;
344 int refs_to_send = 0, refs_to_delete = 0;
345 off_t bytes_sent = 0;
346 struct pack_progress_arg ppa;
347 uint8_t packsha1[SHA1_DIGEST_LENGTH];
348 FILE *packfile = NULL;
351 TAILQ_INIT(&have_refs);
352 TAILQ_INIT(&their_refs);
354 TAILQ_FOREACH(pe, branch_names, entry) {
355 const char *branchname = pe->path;
356 if (strncmp(branchname, "refs/heads/", 11) != 0) {
358 if (asprintf(&s, "refs/heads/%s", branchname) == -1) {
359 err = got_error_from_errno("asprintf");
362 err = insert_ref(&refs, s, repo);
365 err = insert_ref(&refs, branchname, repo);
371 TAILQ_FOREACH(pe, delete_branches, entry) {
372 const char *branchname = pe->path;
373 struct got_reference *ref;
374 if (strncmp(branchname, "refs/heads/", 11) != 0) {
375 err = got_error_fmt(GOT_ERR_SEND_DELETE_REF, "%s",
379 ref = find_ref(&refs, branchname);
381 err = got_error_fmt(GOT_ERR_SEND_DELETE_REF,
382 "changes on %s will be sent to server",
388 TAILQ_FOREACH(pe, tag_names, entry) {
389 const char *tagname = pe->path;
390 if (strncmp(tagname, "refs/tags/", 10) != 0) {
392 if (asprintf(&s, "refs/tags/%s", tagname) == -1) {
393 err = got_error_from_errno("asprintf");
396 err = insert_ref(&refs, s, repo);
399 err = insert_ref(&refs, tagname, repo);
405 if (TAILQ_EMPTY(&refs) && TAILQ_EMPTY(delete_branches)) {
406 err = got_error(GOT_ERR_SEND_EMPTY);
410 TAILQ_FOREACH(re, &refs, entry) {
411 struct got_object_id *id;
414 if (got_ref_is_symbolic(re->ref)) {
415 err = got_error_fmt(GOT_ERR_BAD_REF_TYPE,
416 "cannot send symbolic reference %s",
417 got_ref_get_name(re->ref));
421 err = got_ref_resolve(&id, repo, re->ref);
424 err = got_object_get_type(&obj_type, repo, id);
429 case GOT_OBJ_TYPE_COMMIT:
430 case GOT_OBJ_TYPE_TAG:
433 err = got_error_fmt(GOT_ERR_OBJ_TYPE,
434 "cannot send %s", got_ref_get_name(re->ref));
439 packfile = got_opentemp();
440 if (packfile == NULL) {
441 err = got_error_from_errno("got_opentemp");
445 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_sendfds) == -1) {
446 err = got_error_from_errno("socketpair");
452 err = got_error_from_errno("fork");
454 } else if (sendpid == 0){
455 got_privsep_exec_child(imsg_sendfds,
456 GOT_PATH_PROG_SEND_PACK, got_repo_get_path(repo));
459 if (close(imsg_sendfds[1]) == -1) {
460 err = got_error_from_errno("close");
463 imsg_init(&sendibuf, imsg_sendfds[0]);
464 nsendfd = dup(sendfd);
466 err = got_error_from_errno("dup");
471 * Convert reflist to pathlist since the privsep layer
472 * is linked into helper programs which lack reference.c.
474 TAILQ_FOREACH(re, &refs, entry) {
475 struct got_object_id *id;
476 err = got_ref_resolve(&id, repo, re->ref);
479 err = got_pathlist_append(&have_refs,
480 got_ref_get_name(re->ref), id);
484 * Also prepare the array of our object IDs which
485 * will be needed for generating a pack file.
487 err = realloc_ids(&our_ids, &nalloc_ours, nours + 1);
494 err = got_privsep_send_send_req(&sendibuf, nsendfd, &have_refs,
495 delete_branches, verbosity);
500 err = got_privsep_recv_send_remote_refs(&their_refs, &sendibuf);
505 * Process references reported by the server.
506 * Push appropriate object IDs onto the "their IDs" array.
507 * This array will be used to exclude objects which already
508 * exist on the server from our pack file.
510 TAILQ_FOREACH(pe, &their_refs, entry) {
511 const char *refname = pe->path;
512 struct got_object_id *their_id = pe->data;
514 struct got_object *obj;
515 struct got_reference *my_ref = NULL;
518 /* Don't blindly trust the server to send us valid names. */
519 if (!got_ref_name_is_valid(refname))
522 if (strncmp(refname, "refs/tags/", 10) == 0)
525 * Find out whether this is a reference we want to upload.
526 * Otherwise we can still use this reference as a hint to
527 * avoid uploading any objects the server already has.
529 my_ref = find_ref(&refs, refname);
531 struct got_object_id *my_id;
532 err = got_ref_resolve(&my_id, repo, my_ref);
535 if (got_object_id_cmp(my_id, their_id) != 0) {
536 if (!overwrite_refs && is_tag) {
538 GOT_ERR_SEND_TAG_EXISTS,
548 /* Check if their object exists locally. */
549 err = got_object_open(&obj, repo, their_id);
551 if (err->code != GOT_ERR_NO_OBJ)
553 if (!overwrite_refs && my_ref != NULL) {
554 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY,
560 got_object_close(obj);
564 err = realloc_ids(&their_ids, &nalloc_theirs, ntheirs + 1);
569 /* Enforce linear ancestry if required. */
570 if (!overwrite_refs && my_ref && !is_tag) {
571 struct got_object_id *my_id;
572 err = got_ref_resolve(&my_id, repo, my_ref);
575 err = check_linear_ancestry(refname, my_id,
576 their_id, repo, cancel_cb, cancel_arg);
582 /* Exclude any objects reachable via their ID. */
583 their_ids[ntheirs] = got_object_id_dup(their_id);
584 if (their_ids[ntheirs] == NULL) {
585 err = got_error_from_errno("got_object_id_dup");
589 } else if (!is_tag) {
590 char *remote_refname;
591 struct got_reference *ref;
593 * Exclude any objects which exist on the server
594 * according to a locally cached remote reference.
596 err = get_remote_refname(&remote_refname,
597 remote_name, refname);
600 err = got_ref_open(&ref, repo, remote_refname, 0);
601 free(remote_refname);
603 if (err->code != GOT_ERR_NOT_REF)
606 err = got_ref_resolve(&their_ids[ntheirs],
616 /* Account for any new references we are going to upload. */
617 TAILQ_FOREACH(re, &refs, entry) {
618 if (find_their_ref(&their_refs,
619 got_ref_get_name(re->ref)) == NULL)
623 /* Account for any existing references we are going to delete. */
624 TAILQ_FOREACH(pe, delete_branches, entry) {
625 const char *branchname = pe->path;
626 if (find_their_ref(&their_refs, branchname))
630 if (refs_to_send == 0 && refs_to_delete == 0) {
631 got_privsep_send_stop(imsg_sendfds[0]);
635 if (refs_to_send > 0) {
636 memset(&ppa, 0, sizeof(ppa));
637 ppa.progress_cb = progress_cb;
638 ppa.progress_arg = progress_arg;
639 err = got_pack_create(packsha1, packfile, their_ids, ntheirs,
640 our_ids, nours, repo, 0, 1, pack_progress, &ppa,
641 cancel_cb, cancel_arg);
645 if (fflush(packfile) == -1) {
646 err = got_error_from_errno("fflush");
650 npackfd = dup(fileno(packfile));
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;
668 off_t bytes_sent_cur = 0;
670 err = (*cancel_cb)(cancel_arg);
674 err = got_privsep_recv_send_progress(&done, &bytes_sent,
675 &success, &refname, &sendibuf);
678 if (refname && got_ref_name_is_valid(refname) && success &&
679 strncmp(refname, "refs/tags/", 10) != 0) {
680 struct got_reference *my_ref;
682 * The server has accepted our changes.
683 * Update our reference in refs/remotes/ accordingly.
685 my_ref = find_ref(&refs, refname);
687 err = update_remote_ref(my_ref, remote_name,
693 if (refname != NULL ||
694 bytes_sent_cur != bytes_sent) {
695 err = progress_cb(progress_arg, ppa.ncolored,
696 ppa.nfound, ppa.ntrees, ppa.packfile_size,
697 ppa.ncommits, ppa.nobj_total, ppa.nobj_deltify,
698 ppa.nobj_written, bytes_sent,
704 bytes_sent_cur = bytes_sent;
711 got_privsep_send_stop(imsg_sendfds[0]);
712 if (waitpid(sendpid, &sendstatus, 0) == -1 && err == NULL)
713 err = got_error_from_errno("waitpid");
715 if (packfile && fclose(packfile) == EOF && err == NULL)
716 err = got_error_from_errno("fclose");
717 if (nsendfd != -1 && close(nsendfd) == -1 && err == NULL)
718 err = got_error_from_errno("close");
719 if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
720 err = got_error_from_errno("close");
722 got_ref_list_free(&refs);
723 got_pathlist_free(&have_refs);
724 got_pathlist_free(&their_refs);
725 for (i = 0; i < nours; i++)
728 for (i = 0; i < ntheirs; i++)