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;
115 static const struct got_error *
116 pack_progress(void *arg, off_t packfile_size, int ncommits,
117 int nobj_total, int nobj_deltify, int nobj_written)
119 const struct got_error *err;
120 struct pack_progress_arg *a = arg;
122 err = a->progress_cb(a->progress_arg, packfile_size, ncommits,
123 nobj_total, nobj_deltify, nobj_written, 0, NULL, 0);
127 a->packfile_size = packfile_size;
128 a->ncommits = ncommits;
129 a->nobj_total = nobj_total;
130 a->nobj_deltify = nobj_deltify;
131 a->nobj_written = nobj_written;
135 static const struct got_error *
136 insert_ref(struct got_reflist_head *refs, const char *refname,
137 struct got_repository *repo)
139 const struct got_error *err;
140 struct got_reference *ref;
141 struct got_reflist_entry *new;
143 err = got_ref_open(&ref, repo, refname, 0);
147 err = got_reflist_insert(&new, refs, ref, got_ref_cmp_by_name, NULL);
148 if (err || new == NULL /* duplicate */)
154 static const struct got_error *
155 check_linear_ancestry(const char *refname, struct got_object_id *my_id,
156 struct got_object_id *their_id, struct got_repository *repo,
157 got_cancel_cb cancel_cb, void *cancel_arg)
159 const struct got_error *err = NULL;
160 struct got_object_id *yca_id;
163 err = got_object_get_type(&obj_type, repo, their_id);
166 if (obj_type != GOT_OBJ_TYPE_COMMIT)
167 return got_error_fmt(GOT_ERR_OBJ_TYPE,
168 "bad object type on server for %s", refname);
170 err = got_commit_graph_find_youngest_common_ancestor(&yca_id,
171 my_id, their_id, 1, repo, cancel_cb, cancel_arg);
175 return got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
178 * Require a straight line of history between the two commits,
179 * with their commit being older than my commit.
181 * Non-linear situations such as this require a rebase:
183 * (theirs) D F (mine)
191 if (got_object_id_cmp(their_id, yca_id) != 0)
192 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
198 static const struct got_error *
199 realloc_ids(struct got_object_id ***ids, size_t *nalloc, size_t n)
201 struct got_object_id **new;
202 const size_t alloc_chunksz = 256;
207 new = recallocarray(*ids, *nalloc, *nalloc + alloc_chunksz,
208 sizeof(struct got_object_id));
210 return got_error_from_errno("recallocarray");
213 *nalloc += alloc_chunksz;
217 static struct got_reference *
218 find_ref(struct got_reflist_head *refs, const char *refname)
220 struct got_reflist_entry *re;
222 TAILQ_FOREACH(re, refs, entry) {
223 if (got_path_cmp(got_ref_get_name(re->ref), refname,
224 strlen(got_ref_get_name(re->ref)),
225 strlen(refname)) == 0) {
233 static struct got_pathlist_entry *
234 find_their_ref(struct got_pathlist_head *their_refs, const char *refname)
236 struct got_pathlist_entry *pe;
238 TAILQ_FOREACH(pe, their_refs, entry) {
239 const char *their_refname = pe->path;
240 if (got_path_cmp(their_refname, refname,
241 strlen(their_refname), strlen(refname)) == 0) {
249 static const struct got_error *
250 get_remote_refname(char **remote_refname, const char *remote_name,
253 if (strncmp(refname, "refs/", 5) == 0)
255 if (strncmp(refname, "heads/", 6) == 0)
258 if (asprintf(remote_refname, "refs/remotes/%s/%s",
259 remote_name, refname) == -1)
260 return got_error_from_errno("asprintf");
265 static const struct got_error *
266 update_remote_ref(struct got_reference *my_ref, const char *remote_name,
267 struct got_repository *repo)
269 const struct got_error *err, *unlock_err;
270 struct got_object_id *my_id;
271 struct got_reference *ref = NULL;
272 char *remote_refname = NULL;
275 err = got_ref_resolve(&my_id, repo, my_ref);
279 err = get_remote_refname(&remote_refname, remote_name,
280 got_ref_get_name(my_ref));
284 err = got_ref_open(&ref, repo, remote_refname, 1 /* lock */);
286 if (err->code != GOT_ERR_NOT_REF)
288 err = got_ref_alloc(&ref, remote_refname, my_id);
293 err = got_ref_change_ref(ref, my_id);
298 err = got_ref_write(ref, repo);
302 unlock_err = got_ref_unlock(ref);
303 if (unlock_err && err == NULL)
309 free(remote_refname);
313 const struct got_error*
314 got_send_pack(const char *remote_name, struct got_pathlist_head *branch_names,
315 struct got_pathlist_head *tag_names,
316 struct got_pathlist_head *delete_branches,
317 int verbosity, int overwrite_refs, int sendfd,
318 struct got_repository *repo, got_send_progress_cb progress_cb,
319 void *progress_arg, got_cancel_cb cancel_cb, void *cancel_arg)
322 int npackfd = -1, nsendfd = -1;
323 int sendstatus, done = 0;
324 const struct got_error *err;
325 struct imsgbuf sendibuf;
327 struct got_reflist_head refs;
328 struct got_pathlist_head have_refs;
329 struct got_pathlist_head their_refs;
330 struct got_pathlist_entry *pe;
331 struct got_reflist_entry *re;
332 struct got_object_id **our_ids = NULL;
333 struct got_object_id **their_ids = NULL;
334 int i, nours = 0, ntheirs = 0;
335 size_t nalloc_ours = 0, nalloc_theirs = 0;
336 int refs_to_send = 0, refs_to_delete = 0;
337 off_t bytes_sent = 0;
338 struct pack_progress_arg ppa;
339 uint8_t packsha1[SHA1_DIGEST_LENGTH];
340 FILE *packfile = NULL;
343 TAILQ_INIT(&have_refs);
344 TAILQ_INIT(&their_refs);
346 TAILQ_FOREACH(pe, branch_names, entry) {
347 const char *branchname = pe->path;
348 if (strncmp(branchname, "refs/heads/", 11) != 0) {
350 if (asprintf(&s, "refs/heads/%s", branchname) == -1) {
351 err = got_error_from_errno("asprintf");
354 err = insert_ref(&refs, s, repo);
357 err = insert_ref(&refs, branchname, repo);
363 TAILQ_FOREACH(pe, delete_branches, entry) {
364 const char *branchname = pe->path;
365 struct got_reference *ref;
366 if (strncmp(branchname, "refs/heads/", 11) != 0) {
367 err = got_error_fmt(GOT_ERR_SEND_DELETE_REF, "%s",
371 ref = find_ref(&refs, branchname);
373 err = got_error_fmt(GOT_ERR_SEND_DELETE_REF,
374 "changes on %s will be sent to server",
380 TAILQ_FOREACH(pe, tag_names, entry) {
381 const char *tagname = pe->path;
382 if (strncmp(tagname, "refs/tags/", 10) != 0) {
384 if (asprintf(&s, "refs/tags/%s", tagname) == -1) {
385 err = got_error_from_errno("asprintf");
388 err = insert_ref(&refs, s, repo);
391 err = insert_ref(&refs, tagname, repo);
397 if (TAILQ_EMPTY(&refs) && TAILQ_EMPTY(delete_branches)) {
398 err = got_error(GOT_ERR_SEND_EMPTY);
402 TAILQ_FOREACH(re, &refs, entry) {
403 struct got_object_id *id;
406 if (got_ref_is_symbolic(re->ref)) {
407 err = got_error_fmt(GOT_ERR_BAD_REF_TYPE,
408 "cannot send symbolic reference %s",
409 got_ref_get_name(re->ref));
413 err = got_ref_resolve(&id, repo, re->ref);
416 err = got_object_get_type(&obj_type, repo, id);
421 case GOT_OBJ_TYPE_COMMIT:
422 case GOT_OBJ_TYPE_TAG:
425 err = got_error_fmt(GOT_ERR_OBJ_TYPE,
426 "cannot send %s", got_ref_get_name(re->ref));
431 packfile = got_opentemp();
432 if (packfile == NULL) {
433 err = got_error_from_errno("got_opentemp");
437 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_sendfds) == -1) {
438 err = got_error_from_errno("socketpair");
444 err = got_error_from_errno("fork");
446 } else if (sendpid == 0){
447 got_privsep_exec_child(imsg_sendfds,
448 GOT_PATH_PROG_SEND_PACK, got_repo_get_path(repo));
451 if (close(imsg_sendfds[1]) == -1) {
452 err = got_error_from_errno("close");
455 imsg_init(&sendibuf, imsg_sendfds[0]);
456 nsendfd = dup(sendfd);
458 err = got_error_from_errno("dup");
463 * Convert reflist to pathlist since the privsep layer
464 * is linked into helper programs which lack reference.c.
466 TAILQ_FOREACH(re, &refs, entry) {
467 struct got_object_id *id;
468 err = got_ref_resolve(&id, repo, re->ref);
471 err = got_pathlist_append(&have_refs,
472 got_ref_get_name(re->ref), id);
476 * Also prepare the array of our object IDs which
477 * will be needed for generating a pack file.
479 err = realloc_ids(&our_ids, &nalloc_ours, nours + 1);
486 err = got_privsep_send_send_req(&sendibuf, nsendfd, &have_refs,
487 delete_branches, verbosity);
492 err = got_privsep_recv_send_remote_refs(&their_refs, &sendibuf);
497 * Process references reported by the server.
498 * Push appropriate object IDs onto the "their IDs" array.
499 * This array will be used to exclude objects which already
500 * exist on the server from our pack file.
502 TAILQ_FOREACH(pe, &their_refs, entry) {
503 const char *refname = pe->path;
504 struct got_object_id *their_id = pe->data;
506 struct got_object *obj;
507 struct got_reference *my_ref = NULL;
510 /* Don't blindly trust the server to send us valid names. */
511 if (!got_ref_name_is_valid(refname))
514 if (strncmp(refname, "refs/tags/", 10) == 0)
517 * Find out whether this is a reference we want to upload.
518 * Otherwise we can still use this reference as a hint to
519 * avoid uploading any objects the server already has.
521 my_ref = find_ref(&refs, refname);
523 struct got_object_id *my_id;
524 err = got_ref_resolve(&my_id, repo, my_ref);
527 if (got_object_id_cmp(my_id, their_id) != 0) {
528 if (!overwrite_refs && is_tag) {
530 GOT_ERR_SEND_TAG_EXISTS,
540 /* Check if their object exists locally. */
541 err = got_object_open(&obj, repo, their_id);
543 if (err->code != GOT_ERR_NO_OBJ)
545 if (!overwrite_refs && my_ref != NULL) {
546 err = got_error_fmt(GOT_ERR_SEND_ANCESTRY,
552 got_object_close(obj);
556 err = realloc_ids(&their_ids, &nalloc_theirs, ntheirs + 1);
561 /* Enforce linear ancestry if required. */
562 if (!overwrite_refs && my_ref && !is_tag) {
563 struct got_object_id *my_id;
564 err = got_ref_resolve(&my_id, repo, my_ref);
567 err = check_linear_ancestry(refname, my_id,
568 their_id, repo, cancel_cb, cancel_arg);
574 /* Exclude any objects reachable via their ID. */
575 their_ids[ntheirs] = got_object_id_dup(their_id);
576 if (their_ids[ntheirs] == NULL) {
577 err = got_error_from_errno("got_object_id_dup");
581 } else if (!is_tag) {
582 char *remote_refname;
583 struct got_reference *ref;
585 * Exclude any objects which exist on the server
586 * according to a locally cached remote reference.
588 err = get_remote_refname(&remote_refname,
589 remote_name, refname);
592 err = got_ref_open(&ref, repo, remote_refname, 0);
593 free(remote_refname);
595 if (err->code != GOT_ERR_NOT_REF)
598 err = got_ref_resolve(&their_ids[ntheirs],
608 /* Account for any new references we are going to upload. */
609 TAILQ_FOREACH(re, &refs, entry) {
610 if (find_their_ref(&their_refs,
611 got_ref_get_name(re->ref)) == NULL)
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_their_ref(&their_refs, branchname))
622 if (refs_to_send == 0 && refs_to_delete == 0) {
623 got_privsep_send_stop(imsg_sendfds[0]);
627 if (refs_to_send > 0) {
628 memset(&ppa, 0, sizeof(ppa));
629 ppa.progress_cb = progress_cb;
630 ppa.progress_arg = progress_arg;
631 err = got_pack_create(packsha1, packfile, their_ids, ntheirs,
632 our_ids, nours, repo, 0, 1, pack_progress, &ppa,
633 cancel_cb, cancel_arg);
637 if (fflush(packfile) == -1) {
638 err = got_error_from_errno("fflush");
642 npackfd = dup(fileno(packfile));
644 err = got_error_from_errno("dup");
647 err = got_privsep_send_packfd(&sendibuf, npackfd);
652 err = got_privsep_send_packfd(&sendibuf, -1);
659 char *refname = NULL;
660 off_t bytes_sent_cur = 0;
662 err = (*cancel_cb)(cancel_arg);
666 err = got_privsep_recv_send_progress(&done, &bytes_sent,
667 &success, &refname, &sendibuf);
670 if (refname && got_ref_name_is_valid(refname) && success &&
671 strncmp(refname, "refs/tags/", 10) != 0) {
672 struct got_reference *my_ref;
674 * The server has accepted our changes.
675 * Update our reference in refs/remotes/ accordingly.
677 my_ref = find_ref(&refs, refname);
679 err = update_remote_ref(my_ref, remote_name,
685 if (refname != NULL ||
686 bytes_sent_cur != bytes_sent) {
687 err = progress_cb(progress_arg, ppa.packfile_size,
688 ppa.ncommits, ppa.nobj_total, ppa.nobj_deltify,
689 ppa.nobj_written, bytes_sent,
695 bytes_sent_cur = bytes_sent;
702 got_privsep_send_stop(imsg_sendfds[0]);
703 if (waitpid(sendpid, &sendstatus, 0) == -1 && err == NULL)
704 err = got_error_from_errno("waitpid");
706 if (packfile && fclose(packfile) == EOF && err == NULL)
707 err = got_error_from_errno("fclose");
708 if (nsendfd != -1 && close(nsendfd) == -1 && err == NULL)
709 err = got_error_from_errno("close");
710 if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
711 err = got_error_from_errno("close");
713 got_ref_list_free(&refs);
714 got_pathlist_free(&have_refs);
715 got_pathlist_free(&their_refs);
716 for (i = 0; i < nours; i++)
719 for (i = 0; i < ntheirs; i++)