5 #include "object-store.h"
8 #include "run-command.h"
11 #include "send-pack.h"
13 #include "transport.h"
15 #include "oid-array.h"
16 #include "gpg-interface.h"
20 int option_parse_push_signed(const struct option *opt,
21 const char *arg, int unset)
24 *(int *)(opt->value) = SEND_PACK_PUSH_CERT_NEVER;
27 switch (git_parse_maybe_bool(arg)) {
29 *(int *)(opt->value) = SEND_PACK_PUSH_CERT_ALWAYS;
32 *(int *)(opt->value) = SEND_PACK_PUSH_CERT_NEVER;
35 if (!strcasecmp("if-asked", arg)) {
36 *(int *)(opt->value) = SEND_PACK_PUSH_CERT_IF_ASKED;
39 die("bad %s argument: %s", opt->long_name, arg);
42 static void feed_object(const struct object_id *oid, FILE *fh, int negative)
45 !has_object_file_with_flags(oid,
46 OBJECT_INFO_SKIP_FETCH_OBJECT |
52 fputs(oid_to_hex(oid), fh);
57 * Make a pack stream and spit it out into file descriptor fd
59 static int pack_objects(int fd, struct ref *refs, struct oid_array *advertised,
60 struct oid_array *negotiated,
61 struct send_pack_args *args)
64 * The child becomes pack-objects --revs; we feed
65 * the revision parameters to it via its stdin and
66 * let its stdout go back to the other end.
68 struct child_process po = CHILD_PROCESS_INIT;
73 strvec_push(&po.args, "pack-objects");
74 strvec_push(&po.args, "--all-progress-implied");
75 strvec_push(&po.args, "--revs");
76 strvec_push(&po.args, "--stdout");
77 if (args->use_thin_pack)
78 strvec_push(&po.args, "--thin");
79 if (args->use_ofs_delta)
80 strvec_push(&po.args, "--delta-base-offset");
81 if (args->quiet || !args->progress)
82 strvec_push(&po.args, "-q");
84 strvec_push(&po.args, "--progress");
85 if (is_repository_shallow(the_repository))
86 strvec_push(&po.args, "--shallow");
88 po.out = args->stateless_rpc ? -1 : fd;
91 if (start_command(&po))
92 die_errno("git pack-objects failed");
95 * We feed the pack-objects we just spawned with revision
96 * parameters by writing to the pipe.
98 po_in = xfdopen(po.in, "w");
99 for (i = 0; i < advertised->nr; i++)
100 feed_object(&advertised->oid[i], po_in, 1);
101 for (i = 0; i < negotiated->nr; i++)
102 feed_object(&negotiated->oid[i], po_in, 1);
105 if (!is_null_oid(&refs->old_oid))
106 feed_object(&refs->old_oid, po_in, 1);
107 if (!is_null_oid(&refs->new_oid))
108 feed_object(&refs->new_oid, po_in, 0);
114 die_errno("error writing to pack-objects");
117 if (args->stateless_rpc) {
118 char *buf = xmalloc(LARGE_PACKET_MAX);
120 ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
123 send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
130 rc = finish_command(&po);
133 * For a normal non-zero exit, we assume pack-objects wrote
134 * something useful to stderr. For death by signal, though,
135 * we should mention it to the user. The exception is SIGPIPE
136 * (141), because that's a normal occurrence if the remote end
137 * hangs up (and we'll report that by trying to read the unpack
140 if (rc > 128 && rc != 141)
141 error("pack-objects died of signal %d", rc - 128);
147 static int receive_unpack_status(struct packet_reader *reader)
149 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
150 return error(_("unexpected flush packet while reading remote unpack status"));
151 if (!skip_prefix(reader->line, "unpack ", &reader->line))
152 return error(_("unable to parse remote unpack status: %s"), reader->line);
153 if (strcmp(reader->line, "ok"))
154 return error(_("remote unpack failed: %s"), reader->line);
158 static int receive_status(struct packet_reader *reader, struct ref *refs)
162 struct ref_push_report *report = NULL;
167 ret = receive_unpack_status(reader);
169 struct object_id old_oid, new_oid;
173 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
176 p = strchr(head, ' ');
178 error("invalid status line from remote: %s", reader->line);
184 if (!strcmp(head, "option")) {
185 const char *key, *val;
187 if (!hint || !(report || new_report)) {
189 error("'option' without a matching 'ok/ng' directive");
195 CALLOC_ARRAY(hint->report, 1);
196 report = hint->report;
198 report = hint->report;
200 report = report->next;
201 CALLOC_ARRAY(report->next, 1);
202 report = report->next;
207 p = strchr(key, ' ');
211 if (!strcmp(key, "refname"))
212 report->ref_name = xstrdup_or_null(val);
213 else if (!strcmp(key, "old-oid") && val &&
214 !parse_oid_hex(val, &old_oid, &val))
215 report->old_oid = oiddup(&old_oid);
216 else if (!strcmp(key, "new-oid") && val &&
217 !parse_oid_hex(val, &new_oid, &val))
218 report->new_oid = oiddup(&new_oid);
219 else if (!strcmp(key, "forced-update"))
220 report->forced_update = 1;
226 if (strcmp(head, "ok") && strcmp(head, "ng")) {
227 error("invalid ref status from remote: %s", head);
232 p = strchr(refname, ' ');
235 /* first try searching at our hint, falling back to all refs */
237 hint = find_ref_by_name(hint, refname);
239 hint = find_ref_by_name(refs, refname);
241 warning("remote reported status on unknown ref: %s",
245 if (hint->status != REF_STATUS_EXPECTING_REPORT &&
246 hint->status != REF_STATUS_OK &&
247 hint->status != REF_STATUS_REMOTE_REJECT) {
248 warning("remote reported status on unexpected ref: %s",
252 if (!strcmp(head, "ng")) {
253 hint->status = REF_STATUS_REMOTE_REJECT;
255 hint->remote_status = xstrdup(p);
257 hint->remote_status = "failed";
259 hint->status = REF_STATUS_OK;
260 hint->remote_status = xstrdup_or_null(p);
267 static int sideband_demux(int in, int out, void *data)
270 if (async_with_fork())
272 ret = recv_sideband("send-pack", fd[0], out);
277 static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *cb)
279 struct strbuf *sb = cb;
280 if (graft->nr_parent == -1)
281 packet_buf_write(sb, "shallow %s\n", oid_to_hex(&graft->oid));
285 static void advertise_shallow_grafts_buf(struct strbuf *sb)
287 if (!is_repository_shallow(the_repository))
289 for_each_commit_graft(advertise_shallow_grafts_cb, sb);
292 #define CHECK_REF_NO_PUSH -1
293 #define CHECK_REF_STATUS_REJECTED -2
294 #define CHECK_REF_UPTODATE -3
295 static int check_to_send_update(const struct ref *ref, const struct send_pack_args *args)
297 if (!ref->peer_ref && !args->send_mirror)
298 return CHECK_REF_NO_PUSH;
300 /* Check for statuses set by set_ref_status_for_push() */
301 switch (ref->status) {
302 case REF_STATUS_REJECT_NONFASTFORWARD:
303 case REF_STATUS_REJECT_ALREADY_EXISTS:
304 case REF_STATUS_REJECT_FETCH_FIRST:
305 case REF_STATUS_REJECT_NEEDS_FORCE:
306 case REF_STATUS_REJECT_STALE:
307 case REF_STATUS_REJECT_REMOTE_UPDATED:
308 case REF_STATUS_REJECT_NODELETE:
309 return CHECK_REF_STATUS_REJECTED;
310 case REF_STATUS_UPTODATE:
311 return CHECK_REF_UPTODATE;
314 case REF_STATUS_EXPECTING_REPORT:
315 /* already passed checks on the local side */
317 /* of course this is OK */
323 * the beginning of the next line, or the end of buffer.
325 * NEEDSWORK: perhaps move this to git-compat-util.h or somewhere and
326 * convert many similar uses found by "git grep -A4 memchr".
328 static const char *next_line(const char *line, size_t len)
330 const char *nl = memchr(line, '\n', len);
332 return line + len; /* incomplete line */
336 static int generate_push_cert(struct strbuf *req_buf,
337 const struct ref *remote_refs,
338 struct send_pack_args *args,
339 const char *cap_string,
340 const char *push_cert_nonce)
342 const struct ref *ref;
343 struct string_list_item *item;
344 char *signing_key = xstrdup(get_signing_key());
346 struct strbuf cert = STRBUF_INIT;
349 strbuf_addstr(&cert, "certificate version 0.1\n");
350 strbuf_addf(&cert, "pusher %s ", signing_key);
352 strbuf_addch(&cert, '\n');
353 if (args->url && *args->url) {
354 char *anon_url = transport_anonymize_url(args->url);
355 strbuf_addf(&cert, "pushee %s\n", anon_url);
358 if (push_cert_nonce[0])
359 strbuf_addf(&cert, "nonce %s\n", push_cert_nonce);
360 if (args->push_options)
361 for_each_string_list_item(item, args->push_options)
362 strbuf_addf(&cert, "push-option %s\n", item->string);
363 strbuf_addstr(&cert, "\n");
365 for (ref = remote_refs; ref; ref = ref->next) {
366 if (check_to_send_update(ref, args) < 0)
369 strbuf_addf(&cert, "%s %s %s\n",
370 oid_to_hex(&ref->old_oid),
371 oid_to_hex(&ref->new_oid),
377 if (sign_buffer(&cert, &cert, signing_key))
378 die(_("failed to sign the push certificate"));
380 packet_buf_write(req_buf, "push-cert%c%s", 0, cap_string);
381 for (cp = cert.buf; cp < cert.buf + cert.len; cp = np) {
382 np = next_line(cp, cert.buf + cert.len - cp);
383 packet_buf_write(req_buf,
384 "%.*s", (int)(np - cp), cp);
386 packet_buf_write(req_buf, "push-cert-end\n");
390 strbuf_release(&cert);
394 #define NONCE_LEN_LIMIT 256
396 static void reject_invalid_nonce(const char *nonce, int len)
400 if (NONCE_LEN_LIMIT <= len)
401 die("the receiving end asked to sign an invalid nonce <%.*s>",
404 for (i = 0; i < len; i++) {
405 int ch = nonce[i] & 0xFF;
407 ch == '-' || ch == '.' ||
408 ch == '/' || ch == '+' ||
409 ch == '=' || ch == '_')
411 die("the receiving end asked to sign an invalid nonce <%.*s>",
416 static void get_commons_through_negotiation(const char *url,
417 const struct ref *remote_refs,
418 struct oid_array *commons)
420 struct child_process child = CHILD_PROCESS_INIT;
421 const struct ref *ref;
422 int len = the_hash_algo->hexsz + 1; /* hash + NL */
427 strvec_pushl(&child.args, "fetch", "--negotiate-only", NULL);
428 for (ref = remote_refs; ref; ref = ref->next)
429 strvec_pushf(&child.args, "--negotiation-tip=%s", oid_to_hex(&ref->new_oid));
430 strvec_push(&child.args, url);
432 if (start_command(&child))
433 die(_("send-pack: unable to fork off fetch subprocess"));
436 char hex_hash[GIT_MAX_HEXSZ + 1];
437 int read_len = read_in_full(child.out, hex_hash, len);
438 struct object_id oid;
444 die("invalid length read %d", read_len);
445 if (parse_oid_hex(hex_hash, &oid, &end) || *end != '\n')
447 oid_array_append(commons, &oid);
450 if (finish_command(&child)) {
452 * The information that push negotiation provides is useful but
455 warning(_("push negotiation failed; proceeding anyway with push"));
459 int send_pack(struct send_pack_args *args,
460 int fd[], struct child_process *conn,
461 struct ref *remote_refs,
462 struct oid_array *extra_have)
464 struct oid_array commons = OID_ARRAY_INIT;
467 struct strbuf req_buf = STRBUF_INIT;
468 struct strbuf cap_buf = STRBUF_INIT;
470 int need_pack_data = 0;
471 int allow_deleting_refs = 0;
472 int status_report = 0;
473 int use_sideband = 0;
474 int quiet_supported = 0;
475 int agent_supported = 0;
476 int advertise_sid = 0;
477 int push_negotiate = 0;
479 int atomic_supported = 0;
480 int use_push_options = 0;
481 int push_options_supported = 0;
482 int object_format_supported = 0;
483 unsigned cmds_sent = 0;
486 const char *push_cert_nonce = NULL;
487 struct packet_reader reader;
489 git_config_get_bool("push.negotiate", &push_negotiate);
491 get_commons_through_negotiation(args->url, remote_refs, &commons);
493 git_config_get_bool("transfer.advertisesid", &advertise_sid);
495 /* Does the other end support the reporting? */
496 if (server_supports("report-status-v2"))
498 else if (server_supports("report-status"))
500 if (server_supports("delete-refs"))
501 allow_deleting_refs = 1;
502 if (server_supports("ofs-delta"))
503 args->use_ofs_delta = 1;
504 if (server_supports("side-band-64k"))
506 if (server_supports("quiet"))
508 if (server_supports("agent"))
510 if (!server_supports("session-id"))
512 if (server_supports("no-thin"))
513 args->use_thin_pack = 0;
514 if (server_supports("atomic"))
515 atomic_supported = 1;
516 if (server_supports("push-options"))
517 push_options_supported = 1;
519 if (!server_supports_hash(the_hash_algo->name, &object_format_supported))
520 die(_("the receiving end does not support this repository's hash algorithm"));
522 if (args->push_cert != SEND_PACK_PUSH_CERT_NEVER) {
524 push_cert_nonce = server_feature_value("push-cert", &len);
525 if (push_cert_nonce) {
526 reject_invalid_nonce(push_cert_nonce, len);
527 push_cert_nonce = xmemdupz(push_cert_nonce, len);
528 } else if (args->push_cert == SEND_PACK_PUSH_CERT_ALWAYS) {
529 die(_("the receiving end does not support --signed push"));
530 } else if (args->push_cert == SEND_PACK_PUSH_CERT_IF_ASKED) {
531 warning(_("not sending a push certificate since the"
532 " receiving end does not support --signed"
538 fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
539 "Perhaps you should specify a branch.\n");
542 if (args->atomic && !atomic_supported)
543 die(_("the receiving end does not support --atomic push"));
545 use_atomic = atomic_supported && args->atomic;
547 if (args->push_options && !push_options_supported)
548 die(_("the receiving end does not support push options"));
550 use_push_options = push_options_supported && args->push_options;
552 if (status_report == 1)
553 strbuf_addstr(&cap_buf, " report-status");
554 else if (status_report == 2)
555 strbuf_addstr(&cap_buf, " report-status-v2");
557 strbuf_addstr(&cap_buf, " side-band-64k");
558 if (quiet_supported && (args->quiet || !args->progress))
559 strbuf_addstr(&cap_buf, " quiet");
561 strbuf_addstr(&cap_buf, " atomic");
562 if (use_push_options)
563 strbuf_addstr(&cap_buf, " push-options");
564 if (object_format_supported)
565 strbuf_addf(&cap_buf, " object-format=%s", the_hash_algo->name);
567 strbuf_addf(&cap_buf, " agent=%s", git_user_agent_sanitized());
569 strbuf_addf(&cap_buf, " session-id=%s", trace2_session_id());
572 * NEEDSWORK: why does delete-refs have to be so specific to
573 * send-pack machinery that set_ref_status_for_push() cannot
574 * set this bit for us???
576 for (ref = remote_refs; ref; ref = ref->next)
577 if (ref->deletion && !allow_deleting_refs)
578 ref->status = REF_STATUS_REJECT_NODELETE;
581 * Clear the status for each ref and see if we need to send
584 for (ref = remote_refs; ref; ref = ref->next) {
585 switch (check_to_send_update(ref, args)) {
586 case 0: /* no error */
588 case CHECK_REF_STATUS_REJECTED:
590 * When we know the server would reject a ref update if
591 * we were to send it and we're trying to send the refs
592 * atomically, abort the whole operation.
595 strbuf_release(&req_buf);
596 strbuf_release(&cap_buf);
597 reject_atomic_push(remote_refs, args->send_mirror);
598 error("atomic push failed for ref %s. status: %d\n",
599 ref->name, ref->status);
600 return args->porcelain ? 0 : -1;
602 /* else fallthrough */
609 if (args->dry_run || !status_report)
610 ref->status = REF_STATUS_OK;
612 ref->status = REF_STATUS_EXPECTING_REPORT;
616 advertise_shallow_grafts_buf(&req_buf);
619 * Finally, tell the other end!
621 if (!args->dry_run && push_cert_nonce)
622 cmds_sent = generate_push_cert(&req_buf, remote_refs, args,
623 cap_buf.buf, push_cert_nonce);
624 else if (!args->dry_run)
625 for (ref = remote_refs; ref; ref = ref->next) {
626 char *old_hex, *new_hex;
628 if (check_to_send_update(ref, args) < 0)
631 old_hex = oid_to_hex(&ref->old_oid);
632 new_hex = oid_to_hex(&ref->new_oid);
634 packet_buf_write(&req_buf,
636 old_hex, new_hex, ref->name, 0,
640 packet_buf_write(&req_buf, "%s %s %s",
641 old_hex, new_hex, ref->name);
645 if (use_push_options) {
646 struct string_list_item *item;
648 packet_buf_flush(&req_buf);
649 for_each_string_list_item(item, args->push_options)
650 packet_buf_write(&req_buf, "%s", item->string);
653 if (args->stateless_rpc) {
654 if (!args->dry_run && (cmds_sent || is_repository_shallow(the_repository))) {
655 packet_buf_flush(&req_buf);
656 send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
659 write_or_die(out, req_buf.buf, req_buf.len);
662 strbuf_release(&req_buf);
663 strbuf_release(&cap_buf);
665 if (use_sideband && cmds_sent) {
666 memset(&demux, 0, sizeof(demux));
667 demux.proc = sideband_demux;
670 demux.isolate_sigpipe = 1;
671 if (start_async(&demux))
672 die("send-pack: unable to fork off sideband demultiplexer");
676 packet_reader_init(&reader, in, NULL, 0,
677 PACKET_READ_CHOMP_NEWLINE |
678 PACKET_READ_DIE_ON_ERR_PACKET);
680 if (need_pack_data && cmds_sent) {
681 if (pack_objects(out, remote_refs, extra_have, &commons, args) < 0) {
682 if (args->stateless_rpc)
684 if (git_connection_is_socket(conn))
685 shutdown(fd[0], SHUT_WR);
688 * Do not even bother with the return value; we know we
689 * are failing, and just want the error() side effects,
690 * as well as marking refs with their remote status (if
694 receive_status(&reader, remote_refs);
698 finish_async(&demux);
703 if (!args->stateless_rpc)
704 /* Closed by pack_objects() via start_command() */
707 if (args->stateless_rpc && cmds_sent)
710 if (status_report && cmds_sent)
711 ret = receive_status(&reader, remote_refs);
714 if (args->stateless_rpc)
717 if (use_sideband && cmds_sent) {
719 if (finish_async(&demux)) {
720 error("error in sideband demultiplexer");
731 for (ref = remote_refs; ref; ref = ref->next) {
732 switch (ref->status) {
733 case REF_STATUS_NONE:
734 case REF_STATUS_UPTODATE: