2 * Copyright (c) 2018, 2019 Ori Bernstein <ori@openbsd.org>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <sys/types.h>
19 #include <sys/queue.h>
22 #include <sys/socket.h>
24 #include <sys/resource.h>
25 #include <sys/socket.h>
44 #include "got_error.h"
45 #include "got_reference.h"
46 #include "got_repository.h"
48 #include "got_cancel.h"
49 #include "got_worktree.h"
50 #include "got_object.h"
51 #include "got_opentemp.h"
52 #include "got_fetch.h"
54 #include "got_lib_delta.h"
55 #include "got_lib_inflate.h"
56 #include "got_lib_object.h"
57 #include "got_lib_object_parse.h"
58 #include "got_lib_object_create.h"
59 #include "got_lib_pack.h"
60 #include "got_lib_sha1.h"
61 #include "got_lib_privsep.h"
62 #include "got_lib_object_cache.h"
63 #include "got_lib_repository.h"
64 #include "got_lib_dial.h"
65 #include "got_lib_pkt.h"
68 #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
72 #define ssizeof(_x) ((ssize_t)(sizeof(_x)))
76 #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
79 const struct got_error *
80 got_fetch_connect(pid_t *fetchpid, int *fetchfd, const char *proto,
81 const char *host, const char *port, const char *server_path, int verbosity)
83 const struct got_error *err = NULL;
88 if (strcmp(proto, "ssh") == 0 || strcmp(proto, "git+ssh") == 0)
89 err = got_dial_ssh(fetchpid, fetchfd, host, port,
90 server_path, GOT_DIAL_DIRECTION_FETCH, verbosity);
91 else if (strcmp(proto, "git") == 0)
92 err = got_dial_git(fetchfd, host, port, server_path,
93 GOT_DIAL_DIRECTION_FETCH);
94 else if (strcmp(proto, "http") == 0 || strcmp(proto, "git+http") == 0)
95 err = got_error_path(proto, GOT_ERR_NOT_IMPL);
97 err = got_error_path(proto, GOT_ERR_BAD_PROTO);
101 const struct got_error *
102 got_fetch_pack(struct got_object_id **pack_hash, struct got_pathlist_head *refs,
103 struct got_pathlist_head *symrefs, const char *remote_name,
104 int mirror_references, int fetch_all_branches,
105 struct got_pathlist_head *wanted_branches,
106 struct got_pathlist_head *wanted_refs, int list_refs_only, int verbosity,
107 int fetchfd, struct got_repository *repo, const char *worktree_refname,
108 const char *remote_head, int no_head, got_fetch_progress_cb progress_cb,
112 int imsg_fetchfds[2], imsg_idxfds[2];
113 int packfd = -1, npackfd = -1, idxfd = -1, nidxfd = -1, nfetchfd = -1;
115 int fetchstatus, idxstatus, done = 0;
116 const struct got_error *err;
117 struct imsgbuf fetchibuf, idxibuf;
118 pid_t fetchpid, idxpid;
119 char *tmppackpath = NULL, *tmpidxpath = NULL;
120 char *packpath = NULL, *idxpath = NULL, *id_str = NULL;
121 const char *repo_path = NULL;
122 struct got_pathlist_head have_refs;
123 struct got_pathlist_entry *pe;
124 struct got_reflist_head my_refs;
125 struct got_reflist_entry *re;
126 off_t packfile_size = 0;
127 struct got_packfile_hdr pack_hdr;
130 char *progress = NULL;
135 * Prevent fetching of references that won't make any
136 * sense outside of the remote repository's context.
138 TAILQ_FOREACH(pe, wanted_refs, entry) {
139 const char *refname = pe->path;
140 if (strncmp(refname, "refs/got/", 9) == 0 ||
141 strncmp(refname, "got/", 4) == 0 ||
142 strncmp(refname, "refs/remotes/", 13) == 0 ||
143 strncmp(refname, "remotes/", 8) == 0)
144 return got_error_path(refname, GOT_ERR_FETCH_BAD_REF);
148 repo_path = got_repo_get_path_git_dir(repo);
150 for (i = 0; i < nitems(tmpfds); i++)
153 TAILQ_INIT(&have_refs);
154 TAILQ_INIT(&my_refs);
156 if (!list_refs_only) {
157 err = got_ref_list(&my_refs, repo, NULL,
158 got_ref_cmp_by_name, NULL);
163 TAILQ_FOREACH(re, &my_refs, entry) {
164 struct got_object_id *id;
167 if (got_ref_is_symbolic(re->ref))
170 err = got_ref_resolve(&id, repo, re->ref);
173 refname = strdup(got_ref_get_name(re->ref));
174 if (refname == NULL) {
175 err = got_error_from_errno("strdup");
178 err = got_pathlist_append(&have_refs, refname, id);
183 if (list_refs_only) {
184 packfd = got_opentempfd();
186 err = got_error_from_errno("got_opentempfd");
190 if (asprintf(&path, "%s/%s/fetching.pack",
191 repo_path, GOT_OBJECTS_PACK_DIR) == -1) {
192 err = got_error_from_errno("asprintf");
195 err = got_opentemp_named_fd(&tmppackpath, &packfd, path, "");
199 if (fchmod(packfd, GOT_DEFAULT_FILE_MODE) != 0) {
200 err = got_error_from_errno2("fchmod", tmppackpath);
204 if (list_refs_only) {
205 idxfd = got_opentempfd();
207 err = got_error_from_errno("got_opentempfd");
211 if (asprintf(&path, "%s/%s/fetching.idx",
212 repo_path, GOT_OBJECTS_PACK_DIR) == -1) {
213 err = got_error_from_errno("asprintf");
216 err = got_opentemp_named_fd(&tmpidxpath, &idxfd, path, "");
220 if (fchmod(idxfd, GOT_DEFAULT_FILE_MODE) != 0) {
221 err = got_error_from_errno2("fchmod", tmpidxpath);
227 err = got_error_from_errno("dup");
231 for (i = 0; i < nitems(tmpfds); i++) {
232 tmpfds[i] = got_opentempfd();
233 if (tmpfds[i] == -1) {
234 err = got_error_from_errno("got_opentempfd");
239 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fetchfds) == -1) {
240 err = got_error_from_errno("socketpair");
245 if (fetchpid == -1) {
246 err = got_error_from_errno("fork");
248 } else if (fetchpid == 0){
249 got_privsep_exec_child(imsg_fetchfds,
250 GOT_PATH_PROG_FETCH_PACK, tmppackpath);
253 if (close(imsg_fetchfds[1]) == -1) {
254 err = got_error_from_errno("close");
257 imsg_init(&fetchibuf, imsg_fetchfds[0]);
258 nfetchfd = dup(fetchfd);
259 if (nfetchfd == -1) {
260 err = got_error_from_errno("dup");
263 err = got_privsep_send_fetch_req(&fetchibuf, nfetchfd, &have_refs,
264 fetch_all_branches, wanted_branches, wanted_refs,
265 list_refs_only, worktree_refname, remote_head, no_head, verbosity);
269 npackfd = dup(packfd);
271 err = got_error_from_errno("dup");
274 err = got_privsep_send_fetch_outfd(&fetchibuf, npackfd);
280 progress = calloc(GOT_PKT_MAX, 1);
281 if (progress == NULL) {
282 err = got_error_from_errno("calloc");
286 *pack_hash = calloc(1, sizeof(**pack_hash));
287 if (*pack_hash == NULL) {
288 err = got_error_from_errno("calloc");
293 struct got_object_id *id = NULL;
294 char *refname = NULL;
295 char *server_progress = NULL;
296 off_t packfile_size_cur = 0;
298 err = got_privsep_recv_fetch_progress(&done,
299 &id, &refname, symrefs, &server_progress,
300 &packfile_size_cur, (*pack_hash)->sha1, &fetchibuf);
303 /* Don't report size progress for an empty pack file. */
304 if (packfile_size_cur <= ssizeof(pack_hdr) + SHA1_DIGEST_LENGTH)
305 packfile_size_cur = 0;
306 if (!done && refname && id) {
307 err = got_pathlist_insert(NULL, refs, refname, id);
310 } else if (!done && server_progress) {
313 * XXX git-daemon tends to send batched output with
314 * lines spanning separate packets. Buffer progress
315 * output until we see a CR or LF to avoid giving
316 * partial lines of progress output to the callback.
318 if (strlcat(progress, server_progress,
319 GOT_PKT_MAX) >= GOT_PKT_MAX) {
320 progress[0] = '\0'; /* discard */
323 while ((p = strchr(progress, '\r')) != NULL ||
324 (p = strchr(progress, '\n')) != NULL) {
329 if (asprintf(&s, "%s%s", progress,
330 c == '\n' ? "\n" : "") == -1) {
331 err = got_error_from_errno("asprintf");
334 err = progress_cb(progress_arg, s,
335 packfile_size_cur, 0, 0, 0, 0);
339 n = strlen(progress);
340 if (n < GOT_PKT_MAX - 1) {
341 memmove(progress, &progress[n + 1],
342 GOT_PKT_MAX - n - 1);
346 free(server_progress);
349 } else if (!done && packfile_size_cur != packfile_size) {
350 err = progress_cb(progress_arg, NULL,
351 packfile_size_cur, 0, 0, 0, 0);
354 packfile_size = packfile_size_cur;
357 if (close(imsg_fetchfds[0]) == -1) {
358 err = got_error_from_errno("close");
361 if (waitpid(fetchpid, &fetchstatus, 0) == -1) {
362 err = got_error_from_errno("waitpid");
366 if (lseek(packfd, 0, SEEK_SET) == -1) {
367 err = got_error_from_errno("lseek");
371 /* If zero data was fetched without error we are already up-to-date. */
372 if (packfile_size == 0) {
376 } else if (packfile_size < ssizeof(pack_hdr) + SHA1_DIGEST_LENGTH) {
377 err = got_error_msg(GOT_ERR_BAD_PACKFILE, "short pack file");
382 n = read(packfd, &pack_hdr, ssizeof(pack_hdr));
384 err = got_error_from_errno("read");
387 if (n != ssizeof(pack_hdr)) {
388 err = got_error(GOT_ERR_IO);
391 if (pack_hdr.signature != htobe32(GOT_PACKFILE_SIGNATURE)) {
392 err = got_error_msg(GOT_ERR_BAD_PACKFILE,
393 "bad pack file signature");
396 if (pack_hdr.version != htobe32(GOT_PACKFILE_VERSION)) {
397 err = got_error_msg(GOT_ERR_BAD_PACKFILE,
398 "bad pack file version");
401 nobj = be32toh(pack_hdr.nobjects);
403 packfile_size > ssizeof(pack_hdr) + SHA1_DIGEST_LENGTH)
404 return got_error_msg(GOT_ERR_BAD_PACKFILE,
405 "bad pack file with zero objects");
407 packfile_size <= ssizeof(pack_hdr) + SHA1_DIGEST_LENGTH)
408 return got_error_msg(GOT_ERR_BAD_PACKFILE,
409 "empty pack file with non-zero object count");
413 * If the pack file contains no objects, we may only need to update
414 * references in our repository. The caller will take care of that.
422 if (lseek(packfd, 0, SEEK_SET) == -1) {
423 err = got_error_from_errno("lseek");
427 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_idxfds) == -1) {
428 err = got_error_from_errno("socketpair");
433 err= got_error_from_errno("fork");
435 } else if (idxpid == 0)
436 got_privsep_exec_child(imsg_idxfds,
437 GOT_PATH_PROG_INDEX_PACK, tmppackpath);
438 if (close(imsg_idxfds[1]) == -1) {
439 err = got_error_from_errno("close");
442 imsg_init(&idxibuf, imsg_idxfds[0]);
444 npackfd = dup(packfd);
446 err = got_error_from_errno("dup");
449 err = got_privsep_send_index_pack_req(&idxibuf, (*pack_hash)->sha1,
454 err = got_privsep_send_index_pack_outfd(&idxibuf, nidxfd);
458 for (i = 0; i < nitems(tmpfds); i++) {
459 err = got_privsep_send_tmpfd(&idxibuf, tmpfds[i]);
466 int nobj_total, nobj_indexed, nobj_loose, nobj_resolved;
468 err = got_privsep_recv_index_progress(&done, &nobj_total,
469 &nobj_indexed, &nobj_loose, &nobj_resolved,
473 if (nobj_indexed != 0) {
474 err = progress_cb(progress_arg, NULL,
475 packfile_size, nobj_total,
476 nobj_indexed, nobj_loose, nobj_resolved);
481 if (close(imsg_idxfds[0]) == -1) {
482 err = got_error_from_errno("close");
485 if (waitpid(idxpid, &idxstatus, 0) == -1) {
486 err = got_error_from_errno("waitpid");
490 err = got_object_id_str(&id_str, *pack_hash);
493 if (asprintf(&packpath, "%s/%s/pack-%s.pack",
494 repo_path, GOT_OBJECTS_PACK_DIR, id_str) == -1) {
495 err = got_error_from_errno("asprintf");
499 if (asprintf(&idxpath, "%s/%s/pack-%s.idx",
500 repo_path, GOT_OBJECTS_PACK_DIR, id_str) == -1) {
501 err = got_error_from_errno("asprintf");
507 if (rename(tmppackpath, packpath) == -1) {
508 err = got_error_from_errno3("rename", tmppackpath, packpath);
513 if (rename(tmpidxpath, idxpath) == -1) {
514 err = got_error_from_errno3("rename", tmpidxpath, idxpath);
521 if (tmppackpath && unlink(tmppackpath) == -1 && err == NULL)
522 err = got_error_from_errno2("unlink", tmppackpath);
523 if (tmpidxpath && unlink(tmpidxpath) == -1 && err == NULL)
524 err = got_error_from_errno2("unlink", tmpidxpath);
525 if (nfetchfd != -1 && close(nfetchfd) == -1 && err == NULL)
526 err = got_error_from_errno("close");
527 if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
528 err = got_error_from_errno("close");
529 if (packfd != -1 && close(packfd) == -1 && err == NULL)
530 err = got_error_from_errno("close");
531 if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
532 err = got_error_from_errno("close");
533 for (i = 0; i < nitems(tmpfds); i++) {
534 if (tmpfds[i] != -1 && close(tmpfds[i]) == -1 && err == NULL)
535 err = got_error_from_errno("close");
544 got_pathlist_free(&have_refs, GOT_PATHLIST_FREE_ALL);
545 got_ref_list_free(&my_refs);
549 got_pathlist_free(refs, GOT_PATHLIST_FREE_ALL);
550 got_pathlist_free(symrefs, GOT_PATHLIST_FREE_ALL);