1 /*
2  * Copyright (c) 2019 Ori Bernstein <ori@openbsd.org>
3  * Copyright (c) 2020 Stefan Sperling <stsp@openbsd.org>
4  *
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.
8  *
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.
16  */
17 
18 #include <sys/types.h>
19 #include <sys/queue.h>
20 #include <sys/mman.h>
21 #include <sys/uio.h>
22 
23 #include <sha1.h>
24 #include <sha2.h>
25 #include <stdint.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <imsg.h>
30 #include <limits.h>
31 #include <time.h>
32 #include <unistd.h>
33 
34 #include "got_error.h"
35 #include "got_object.h"
36 
37 #include "got_lib_delta.h"
38 #include "got_lib_delta_cache.h"
39 #include "got_lib_hash.h"
40 #include "got_lib_object.h"
41 #include "got_lib_object_qid.h"
42 #include "got_lib_privsep.h"
43 #include "got_lib_ratelimit.h"
44 #include "got_lib_pack.h"
45 #include "got_lib_pack_index.h"
46 
47 #ifndef nitems
48 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
49 #endif
50 
51 static const struct got_error *
52 send_index_pack_progress(void *arg, uint32_t nobj_total, uint32_t nobj_indexed,
53     uint32_t nobj_loose, uint32_t nobj_resolved)
54 {
55 	struct imsgbuf *ibuf = arg;
56 	struct got_imsg_index_pack_progress iprogress;
57 
58 	iprogress.nobj_total = nobj_total;
59 	iprogress.nobj_indexed = nobj_indexed;
60 	iprogress.nobj_loose = nobj_loose;
61 	iprogress.nobj_resolved = nobj_resolved;
62 
63 	if (imsg_compose(ibuf, GOT_IMSG_IDXPACK_PROGRESS, 0, 0, -1,
64 	    &iprogress, sizeof(iprogress)) == -1)
65 		return got_error_from_errno("imsg_compose IDXPACK_PROGRESS");
66 
67 	return got_privsep_flush_imsg(ibuf);
68 }
69 
70 static const struct got_error *
71 send_index_pack_done(struct imsgbuf *ibuf)
72 {
73 	if (imsg_compose(ibuf, GOT_IMSG_IDXPACK_DONE, 0, 0, -1, NULL, 0) == -1)
74 		return got_error_from_errno("imsg_compose FETCH");
75 	return got_privsep_flush_imsg(ibuf);
76 }
77 
78 
79 int
80 main(int argc, char **argv)
81 {
82 	const struct got_error *err = NULL, *close_err;
83 	struct imsgbuf ibuf;
84 	struct imsg imsg;
85 	size_t i;
86 	int idxfd = -1, tmpfd = -1;
87 	FILE *tmpfiles[3];
88 	struct got_pack pack;
89 	uint8_t pack_hash[SHA1_DIGEST_LENGTH];
90 	off_t packfile_size;
91 	struct got_ratelimit rl;
92 #if 0
93 	static int attached;
94 	while (!attached)
95 		sleep(1);
96 #endif
97 
98 	got_ratelimit_init(&rl, 0, 500);
99 
100 	for (i = 0; i < nitems(tmpfiles); i++)
101 		tmpfiles[i] = NULL;
102 
103 	memset(&pack, 0, sizeof(pack));
104 	pack.fd = -1;
105 	err = got_delta_cache_alloc(&pack.delta_cache);
106 	if (err)
107 		goto done;
108 
109 	imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
110 #ifndef PROFILE
111 	/* revoke access to most system calls */
112 	if (pledge("stdio recvfd", NULL) == -1) {
113 		err = got_error_from_errno("pledge");
114 		got_privsep_send_error(&ibuf, err);
115 		return 1;
116 	}
117 #endif
118 	err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
119 	if (err)
120 		goto done;
121 	if (imsg.hdr.type == GOT_IMSG_STOP)
122 		goto done;
123 	if (imsg.hdr.type != GOT_IMSG_IDXPACK_REQUEST) {
124 		err = got_error(GOT_ERR_PRIVSEP_MSG);
125 		goto done;
126 	}
127 	if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(pack_hash)) {
128 		err = got_error(GOT_ERR_PRIVSEP_LEN);
129 		goto done;
130 	}
131 	memcpy(pack_hash, imsg.data, sizeof(pack_hash));
132 	pack.fd = imsg_get_fd(&imsg);
133 
134 	err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
135 	if (err)
136 		goto done;
137 	if (imsg.hdr.type == GOT_IMSG_STOP)
138 		goto done;
139 	if (imsg.hdr.type != GOT_IMSG_IDXPACK_OUTFD) {
140 		err = got_error(GOT_ERR_PRIVSEP_MSG);
141 		goto done;
142 	}
143 	if (imsg.hdr.len - IMSG_HEADER_SIZE != 0) {
144 		err = got_error(GOT_ERR_PRIVSEP_LEN);
145 		goto done;
146 	}
147 	idxfd = imsg_get_fd(&imsg);
148 
149 	for (i = 0; i < nitems(tmpfiles); i++) {
150 		err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
151 		if (err)
152 			goto done;
153 		if (imsg.hdr.type == GOT_IMSG_STOP)
154 			goto done;
155 		if (imsg.hdr.type != GOT_IMSG_TMPFD) {
156 			err = got_error(GOT_ERR_PRIVSEP_MSG);
157 			goto done;
158 		}
159 		if (imsg.hdr.len - IMSG_HEADER_SIZE != 0) {
160 			err = got_error(GOT_ERR_PRIVSEP_LEN);
161 			goto done;
162 		}
163 		tmpfd = imsg_get_fd(&imsg);
164 		tmpfiles[i] = fdopen(tmpfd, "w+");
165 		if (tmpfiles[i] == NULL) {
166 			err = got_error_from_errno("fdopen");
167 			goto done;
168 		}
169 		tmpfd = -1;
170 	}
171 
172 	if (lseek(pack.fd, 0, SEEK_END) == -1) {
173 		err = got_error_from_errno("lseek");
174 		goto done;
175 	}
176 	packfile_size = lseek(pack.fd, 0, SEEK_CUR);
177 	if (packfile_size == -1) {
178 		err = got_error_from_errno("lseek");
179 		goto done;
180 	}
181 	pack.filesize = packfile_size;
182 
183 	if (lseek(pack.fd, 0, SEEK_SET) == -1) {
184 		err = got_error_from_errno("lseek");
185 		goto done;
186 	}
187 
188 #ifndef GOT_PACK_NO_MMAP
189 	if (pack.filesize > 0 && pack.filesize <= SIZE_MAX) {
190 		pack.map = mmap(NULL, pack.filesize, PROT_READ, MAP_PRIVATE,
191 		    pack.fd, 0);
192 		if (pack.map == MAP_FAILED)
193 			pack.map = NULL; /* fall back to read(2) */
194 	}
195 #endif
196 	err = got_pack_index(&pack, idxfd, tmpfiles[0], tmpfiles[1],
197 	    tmpfiles[2], pack_hash, send_index_pack_progress, &ibuf, &rl);
198 done:
199 	close_err = got_pack_close(&pack);
200 	if (close_err && err == NULL)
201 		err = close_err;
202 	if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
203 		err = got_error_from_errno("close");
204 	if (tmpfd != -1 && close(tmpfd) == -1 && err == NULL)
205 		err = got_error_from_errno("close");
206 	for (i = 0; i < nitems(tmpfiles); i++) {
207 		if (tmpfiles[i] != NULL && fclose(tmpfiles[i]) == EOF &&
208 		    err == NULL)
209 			err = got_error_from_errno("fclose");
210 	}
211 
212 	if (err == NULL)
213 		err = send_index_pack_done(&ibuf);
214 	if (err) {
215 		got_privsep_send_error(&ibuf, err);
216 		fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
217 		got_privsep_send_error(&ibuf, err);
218 		exit(1);
219 	}
220 
221 	exit(0);
222 }