libexec/got-index-pack/got-index-pack.c

   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 <err.h>
  24 #include <stdint.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <imsg.h>
  29 #include <limits.h>
  30 #include <time.h>
  31 #include <unistd.h>
  32
  33 #include "got_compat.h"
  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         struct got_object_id pack_hash;
  86         size_t i;
  87         int idxfd = -1, tmpfd = -1;
  88         FILE *tmpfiles[3];
  89         struct got_pack pack;
  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         if (imsgbuf_init(&ibuf, GOT_IMSG_FD_CHILD) == -1) {
 110                 warn("imsgbuf_init");
 111                 return 1;
 112         }
 113         imsgbuf_allow_fdpass(&ibuf);
 114 #ifndef PROFILE
 115         /* revoke access to most system calls */
 116         if (pledge("stdio recvfd", NULL) == -1) {
 117                 err = got_error_from_errno("pledge");
 118                 got_privsep_send_error(&ibuf, err);
 119                 return 1;
 120         }
 121
 122         /* revoke fs access */
 123         if (landlock_no_fs() == -1) {
 124                 err = got_error_from_errno("landlock_no_fs");
 125                 got_privsep_send_error(&ibuf, err);
 126                 return 1;
 127         }
 128         if (cap_enter() == -1) {
 129                 err = got_error_from_errno("cap_enter");
 130                 got_privsep_send_error(&ibuf, err);
 131                 return 1;
 132         }
 133 #endif
 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_REQUEST) {
 140                 err = got_error(GOT_ERR_PRIVSEP_MSG);
 141                 goto done;
 142         }
 143         if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(pack_hash)) {
 144                 err = got_error(GOT_ERR_PRIVSEP_LEN);
 145                 goto done;
 146         }
 147         memcpy(&pack_hash, imsg.data, sizeof(pack_hash));
 148         pack.fd = imsg_get_fd(&imsg);
 149         pack.algo = pack_hash.algo;
 150
 151         err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
 152         if (err)
 153                 goto done;
 154         if (imsg.hdr.type == GOT_IMSG_STOP)
 155                 goto done;
 156         if (imsg.hdr.type != GOT_IMSG_IDXPACK_OUTFD) {
 157                 err = got_error(GOT_ERR_PRIVSEP_MSG);
 158                 goto done;
 159         }
 160         if (imsg.hdr.len - IMSG_HEADER_SIZE != 0) {
 161                 err = got_error(GOT_ERR_PRIVSEP_LEN);
 162                 goto done;
 163         }
 164         idxfd = imsg_get_fd(&imsg);
 165
 166         for (i = 0; i < nitems(tmpfiles); i++) {
 167                 err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
 168                 if (err)
 169                         goto done;
 170                 if (imsg.hdr.type == GOT_IMSG_STOP)
 171                         goto done;
 172                 if (imsg.hdr.type != GOT_IMSG_TMPFD) {
 173                         err = got_error(GOT_ERR_PRIVSEP_MSG);
 174                         goto done;
 175                 }
 176                 if (imsg.hdr.len - IMSG_HEADER_SIZE != 0) {
 177                         err = got_error(GOT_ERR_PRIVSEP_LEN);
 178                         goto done;
 179                 }
 180                 tmpfd = imsg_get_fd(&imsg);
 181                 tmpfiles[i] = fdopen(tmpfd, "w+");
 182                 if (tmpfiles[i] == NULL) {
 183                         err = got_error_from_errno("fdopen");
 184                         goto done;
 185                 }
 186                 tmpfd = -1;
 187         }
 188
 189         if (lseek(pack.fd, 0, SEEK_END) == -1) {
 190                 err = got_error_from_errno("lseek");
 191                 goto done;
 192         }
 193         packfile_size = lseek(pack.fd, 0, SEEK_CUR);
 194         if (packfile_size == -1) {
 195                 err = got_error_from_errno("lseek");
 196                 goto done;
 197         }
 198         pack.filesize = packfile_size;
 199
 200         if (lseek(pack.fd, 0, SEEK_SET) == -1) {
 201                 err = got_error_from_errno("lseek");
 202                 goto done;
 203         }
 204
 205 #ifndef GOT_PACK_NO_MMAP
 206         if (pack.filesize > 0 && pack.filesize <= SIZE_MAX) {
 207                 pack.map = mmap(NULL, pack.filesize, PROT_READ, MAP_PRIVATE,
 208                     pack.fd, 0);
 209                 if (pack.map == MAP_FAILED)
 210                         pack.map = NULL; /* fall back to read(2) */
 211         }
 212 #endif
 213         err = got_pack_index(&pack, idxfd, tmpfiles[0], tmpfiles[1],
 214             tmpfiles[2], &pack_hash, send_index_pack_progress, &ibuf, &rl);
 215 done:
 216         close_err = got_pack_close(&pack);
 217         if (close_err && err == NULL)
 218                 err = close_err;
 219         if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
 220                 err = got_error_from_errno("close");
 221         if (tmpfd != -1 && close(tmpfd) == -1 && err == NULL)
 222                 err = got_error_from_errno("close");
 223         for (i = 0; i < nitems(tmpfiles); i++) {
 224                 if (tmpfiles[i] != NULL && fclose(tmpfiles[i]) == EOF &&
 225                     err == NULL)
 226                         err = got_error_from_errno("fclose");
 227         }
 228
 229         if (err == NULL)
 230                 err = send_index_pack_done(&ibuf);
 231         if (err) {
 232                 got_privsep_send_error(&ibuf, err);
 233                 fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
 234                 got_privsep_send_error(&ibuf, err);
 235                 exit(1);
 236         }
 237
 238         exit(0);
 239 }