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 <stdint.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <imsg.h>
  28 #include <limits.h>
  29 #include <time.h>
  30 #include <unistd.h>
  31
  32 #include "got_compat.h"
  33 #include "got_error.h"
  34 #include "got_object.h"
  35
  36 #include "got_lib_delta.h"
  37 #include "got_lib_delta_cache.h"
  38 #include "got_lib_hash.h"
  39 #include "got_lib_object.h"
  40 #include "got_lib_object_qid.h"
  41 #include "got_lib_privsep.h"
  42 #include "got_lib_ratelimit.h"
  43 #include "got_lib_pack.h"
  44 #include "got_lib_pack_index.h"
  45
  46 #ifndef nitems
  47 #define nitems(_a)      (sizeof((_a)) / sizeof((_a)[0]))
  48 #endif
  49
  50 static const struct got_error *
  51 send_index_pack_progress(void *arg, uint32_t nobj_total, uint32_t nobj_indexed,
  52     uint32_t nobj_loose, uint32_t nobj_resolved)
  53 {
  54         struct imsgbuf *ibuf = arg;
  55         struct got_imsg_index_pack_progress iprogress;
  56
  57         iprogress.nobj_total = nobj_total;
  58         iprogress.nobj_indexed = nobj_indexed;
  59         iprogress.nobj_loose = nobj_loose;
  60         iprogress.nobj_resolved = nobj_resolved;
  61
  62         if (imsg_compose(ibuf, GOT_IMSG_IDXPACK_PROGRESS, 0, 0, -1,
  63             &iprogress, sizeof(iprogress)) == -1)
  64                 return got_error_from_errno("imsg_compose IDXPACK_PROGRESS");
  65
  66         return got_privsep_flush_imsg(ibuf);
  67 }
  68
  69 static const struct got_error *
  70 send_index_pack_done(struct imsgbuf *ibuf)
  71 {
  72         if (imsg_compose(ibuf, GOT_IMSG_IDXPACK_DONE, 0, 0, -1, NULL, 0) == -1)
  73                 return got_error_from_errno("imsg_compose FETCH");
  74         return got_privsep_flush_imsg(ibuf);
  75 }
  76
  77
  78 int
  79 main(int argc, char **argv)
  80 {
  81         const struct got_error *err = NULL, *close_err;
  82         struct imsgbuf ibuf;
  83         struct imsg imsg;
  84         size_t i;
  85         int idxfd = -1, tmpfd = -1;
  86         FILE *tmpfiles[3];
  87         struct got_pack pack;
  88         uint8_t pack_hash[SHA1_DIGEST_LENGTH];
  89         off_t packfile_size;
  90         struct got_ratelimit rl;
  91 #if 0
  92         static int attached;
  93         while (!attached)
  94                 sleep(1);
  95 #endif
  96
  97         got_ratelimit_init(&rl, 0, 500);
  98
  99         for (i = 0; i < nitems(tmpfiles); i++)
 100                 tmpfiles[i] = NULL;
 101
 102         memset(&pack, 0, sizeof(pack));
 103         pack.fd = -1;
 104         err = got_delta_cache_alloc(&pack.delta_cache);
 105         if (err)
 106                 goto done;
 107
 108         imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
 109 #ifndef PROFILE
 110         /* revoke access to most system calls */
 111         if (pledge("stdio recvfd", NULL) == -1) {
 112                 err = got_error_from_errno("pledge");
 113                 got_privsep_send_error(&ibuf, err);
 114                 return 1;
 115         }
 116
 117         /* revoke fs access */
 118         if (landlock_no_fs() == -1) {
 119                 err = got_error_from_errno("landlock_no_fs");
 120                 got_privsep_send_error(&ibuf, err);
 121                 return 1;
 122         }
 123         if (cap_enter() == -1) {
 124                 err = got_error_from_errno("cap_enter");
 125                 got_privsep_send_error(&ibuf, err);
 126                 return 1;
 127         }
 128 #endif
 129         err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
 130         if (err)
 131                 goto done;
 132         if (imsg.hdr.type == GOT_IMSG_STOP)
 133                 goto done;
 134         if (imsg.hdr.type != GOT_IMSG_IDXPACK_REQUEST) {
 135                 err = got_error(GOT_ERR_PRIVSEP_MSG);
 136                 goto done;
 137         }
 138         if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(pack_hash)) {
 139                 err = got_error(GOT_ERR_PRIVSEP_LEN);
 140                 goto done;
 141         }
 142         memcpy(pack_hash, imsg.data, sizeof(pack_hash));
 143         pack.fd = imsg.fd;
 144
 145         err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
 146         if (err)
 147                 goto done;
 148         if (imsg.hdr.type == GOT_IMSG_STOP)
 149                 goto done;
 150         if (imsg.hdr.type != GOT_IMSG_IDXPACK_OUTFD) {
 151                 err = got_error(GOT_ERR_PRIVSEP_MSG);
 152                 goto done;
 153         }
 154         if (imsg.hdr.len - IMSG_HEADER_SIZE != 0) {
 155                 err = got_error(GOT_ERR_PRIVSEP_LEN);
 156                 goto done;
 157         }
 158         idxfd = imsg.fd;
 159
 160         for (i = 0; i < nitems(tmpfiles); i++) {
 161                 err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
 162                 if (err)
 163                         goto done;
 164                 if (imsg.hdr.type == GOT_IMSG_STOP)
 165                         goto done;
 166                 if (imsg.hdr.type != GOT_IMSG_TMPFD) {
 167                         err = got_error(GOT_ERR_PRIVSEP_MSG);
 168                         goto done;
 169                 }
 170                 if (imsg.hdr.len - IMSG_HEADER_SIZE != 0) {
 171                         err = got_error(GOT_ERR_PRIVSEP_LEN);
 172                         goto done;
 173                 }
 174                 tmpfd = imsg.fd;
 175                 tmpfiles[i] = fdopen(tmpfd, "w+");
 176                 if (tmpfiles[i] == NULL) {
 177                         err = got_error_from_errno("fdopen");
 178                         goto done;
 179                 }
 180                 tmpfd = -1;
 181         }
 182
 183         if (lseek(pack.fd, 0, SEEK_END) == -1) {
 184                 err = got_error_from_errno("lseek");
 185                 goto done;
 186         }
 187         packfile_size = lseek(pack.fd, 0, SEEK_CUR);
 188         if (packfile_size == -1) {
 189                 err = got_error_from_errno("lseek");
 190                 goto done;
 191         }
 192         pack.filesize = packfile_size;
 193
 194         if (lseek(pack.fd, 0, SEEK_SET) == -1) {
 195                 err = got_error_from_errno("lseek");
 196                 goto done;
 197         }
 198
 199 #ifndef GOT_PACK_NO_MMAP
 200         if (pack.filesize > 0 && pack.filesize <= SIZE_MAX) {
 201                 pack.map = mmap(NULL, pack.filesize, PROT_READ, MAP_PRIVATE,
 202                     pack.fd, 0);
 203                 if (pack.map == MAP_FAILED)
 204                         pack.map = NULL; /* fall back to read(2) */
 205         }
 206 #endif
 207         err = got_pack_index(&pack, idxfd, tmpfiles[0], tmpfiles[1],
 208             tmpfiles[2], pack_hash, send_index_pack_progress, &ibuf, &rl);
 209 done:
 210         close_err = got_pack_close(&pack);
 211         if (close_err && err == NULL)
 212                 err = close_err;
 213         if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
 214                 err = got_error_from_errno("close");
 215         if (tmpfd != -1 && close(tmpfd) == -1 && err == NULL)
 216                 err = got_error_from_errno("close");
 217         for (i = 0; i < nitems(tmpfiles); i++) {
 218                 if (tmpfiles[i] != NULL && fclose(tmpfiles[i]) == EOF &&
 219                     err == NULL)
 220                         err = got_error_from_errno("fclose");
 221         }
 222
 223         if (err == NULL)
 224                 err = send_index_pack_done(&ibuf);
 225         if (err) {
 226                 got_privsep_send_error(&ibuf, err);
 227                 fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
 228                 got_privsep_send_error(&ibuf, err);
 229                 exit(1);
 230         }
 231
 232         exit(0);
 233 }