blob: 4733a2a6ffb2880bca682e593b5e9015dbb154bb [file] [log] [blame]
/*
* Copyright (C) 2012 STRATO. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <getopt.h>
int print_binary = 0;
int print_multiline = 0;
/*
* stream definitions taken from send.h, (C) Alexander Block
*/
#define BTRFS_SEND_STREAM_MAGIC "btrfs-stream"
#define BTRFS_SEND_STREAM_VERSION 1
#define BTRFS_SEND_BUF_SIZE (1024 * 64)
struct btrfs_stream_header {
char magic[sizeof(BTRFS_SEND_STREAM_MAGIC)];
uint32_t version;
} __attribute__ ((__packed__));
struct btrfs_cmd_header {
/* len excluding the header */
uint32_t len;
uint16_t cmd;
/* crc including the header with zero crc field */
uint32_t crc;
} __attribute__ ((__packed__));
struct btrfs_tlv_header {
uint16_t tlv_type;
/* len excluding the header */
uint16_t tlv_len;
} __attribute__ ((__packed__));
char *cmd_names[] = {
"UNSPEC",
"SUBVOL",
"SNAPSHOT",
"MKFILE",
"MKDIR",
"MKNOD",
"MKFIFO",
"MKSOCK",
"SYMLINK",
"RENAME",
"LINK",
"UNLINK",
"RMDIR",
"SET_XATTR",
"REMOVE_XATTR",
"WRITE",
"CLONE",
"TRUNCATE",
"CHMOD",
"CHOWN",
"UTIMES",
"END"
};
#define MAX_CMDS (sizeof(cmd_names) / sizeof(char *))
#define TYPE_UNDEF 0
#define TYPE_INT 1
#define TYPE_STRING 2
#define TYPE_BINARY 3
#define TYPE_TIME 4
#define TYPE_HEX 5
#define TYPE_OCTAL 6
#define TYPE_LEN_ONLY 7
struct attr_types {
const char *name;
int type;
} attrs[] = {
{ "UNSPEC", TYPE_UNDEF },
{ "UUID", TYPE_BINARY },
{ "CTRANSID", TYPE_INT },
{ "INO", TYPE_INT },
{ "SIZE", TYPE_INT },
{ "MODE", TYPE_OCTAL },
{ "UID", TYPE_INT },
{ "GID", TYPE_INT },
{ "RDEV", TYPE_HEX },
{ "CTIME", TYPE_TIME },
{ "MTIME", TYPE_TIME },
{ "ATIME", TYPE_TIME },
{ "OTIME", TYPE_TIME },
{ "XATTR_NAME", TYPE_STRING },
{ "XATTR_DATA", TYPE_BINARY },
{ "PATH", TYPE_STRING },
{ "PATH_TO", TYPE_STRING },
{ "PATH_LINK", TYPE_STRING },
{ "FILE_OFFSET", TYPE_INT },
{ "DATA", TYPE_LEN_ONLY },
{ "CLONE_UUID", TYPE_BINARY },
{ "CLONE_CTRANSID", TYPE_INT },
{ "CLONE_PATH", TYPE_STRING },
{ "CLONE_OFFSET", TYPE_INT },
{ "CLONE_LEN", TYPE_INT }
};
#define MAX_ATTRS (sizeof(attrs) / sizeof(struct attr_types))
static int dump_file(FILE *in);
uint16_t
read16(const void *d)
{
const uint8_t *data = d;
return data[0] + (1 << 8) * (uint16_t)data[1];
}
uint32_t
read32(const void *d)
{
const uint8_t *data = d;
return read16(data) + (1 << 16) * (uint32_t)read16(data + 2);
}
uint64_t
read64(const void *d)
{
const uint8_t *data = d;
return read32(data) + (1ull << 32) * (uint64_t)read32(data + 4);
}
/*
* Extracted from the linux kernel source code, lib/libcrc32c.c.
*
*/
static const uint32_t crc32c_table[256] = {
0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L,
0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL,
0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL,
0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L,
0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL,
0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L,
0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L,
0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL,
0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL,
0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L,
0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L,
0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL,
0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L,
0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL,
0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL,
0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L,
0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L,
0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L,
0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L,
0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L,
0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L,
0x96BF4DCCL, 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L,
0xDBFC821CL, 0x2997011FL, 0x3AC7F2EBL, 0xC8AC71E8L,
0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, 0x0F36E6F7L,
0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L,
0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L,
0xEB1FCBADL, 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L,
0x2C855CB2L, 0xDEEEDFB1L, 0xCDBE2C45L, 0x3FD5AF46L,
0x7198540DL, 0x83F3D70EL, 0x90A324FAL, 0x62C8A7F9L,
0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L,
0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L,
0x3CDB9BDDL, 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L,
0x82F63B78L, 0x709DB87BL, 0x63CD4B8FL, 0x91A6C88CL,
0x456CAC67L, 0xB7072F64L, 0xA457DC90L, 0x563C5F93L,
0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L,
0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL,
0x92A8FC17L, 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L,
0x55326B08L, 0xA759E80BL, 0xB4091BFFL, 0x466298FCL,
0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, 0x0B21572CL,
0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L,
0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L,
0x65D122B9L, 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL,
0x2892ED69L, 0xDAF96E6AL, 0xC9A99D9EL, 0x3BC21E9DL,
0xEF087A76L, 0x1D63F975L, 0x0E330A81L, 0xFC588982L,
0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL,
0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L,
0x38CC2A06L, 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L,
0xFF56BD19L, 0x0D3D3E1AL, 0x1E6DCDEEL, 0xEC064EEDL,
0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, 0xD0DDD530L,
0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL,
0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL,
0x8ECEE914L, 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L,
0xD3D3E1ABL, 0x21B862A8L, 0x32E8915CL, 0xC083125FL,
0x144976B4L, 0xE622F5B7L, 0xF5720643L, 0x07198540L,
0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L,
0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL,
0xE330A81AL, 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL,
0x24AA3F05L, 0xD6C1BC06L, 0xC5914FF2L, 0x37FACCF1L,
0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, 0x7AB90321L,
0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL,
0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L,
0x34F4F86AL, 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL,
0x79B737BAL, 0x8BDCB4B9L, 0x988C474DL, 0x6AE7C44EL,
0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, 0xAD7D5351L
};
uint32_t crc32c(uint32_t crc, unsigned char const *data, int size)
{
while (size--)
crc = crc32c_table[(crc ^ *data++) & 0xffl] ^ (crc >> 8);
return crc;
}
int
print_attr(int type, char *buf, int len)
{
switch (type) {
case TYPE_UNDEF:
break;
case TYPE_INT:
case TYPE_HEX:
case TYPE_OCTAL:;
uint64_t v;
char *format = NULL;
if (len != 8) {
printf("invalid length for integer type attribute\n");
return -1;
}
if (type == TYPE_INT)
format = "%lld";
else if (type == TYPE_HEX)
format = "%llx";
else if (type == TYPE_OCTAL)
format = "%llo";
v = read64(buf);
printf(format, v);
break;
case TYPE_STRING:
printf("%.*s", len, buf);
break;
case TYPE_BINARY:;
int i;
if (print_binary)
for (i = 0; i < len; ++i)
printf("%02x", (unsigned char)buf[i]);
else
printf("<blob len %d>", len);
break;
case TYPE_TIME:;
uint64_t sec;
uint32_t nsec;
struct tm *t;
time_t tim;
if (len != 12) {
printf("invalid length for timespec attribute\n");
return -1;
}
sec = read64(buf);
nsec = read32(buf + 8);
tim = sec; /* XXX lossy */
t = localtime(&tim);
printf("%04d-%02d-%02d %02d:%02d:%02d.%09d",
t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
t->tm_hour, t->tm_min, t->tm_sec, nsec);
break;
case TYPE_LEN_ONLY:
printf("length %d", len);
break;
}
return 0;
}
int
do_read(FILE *in, void *buf, int len, off_t *offset)
{
int ret;
if (len == 0)
return 0;
ret = fread(buf, 1, len, in);
if (ret == 0)
return 1;
if (ret != len) {
printf("read error (@offset %lu): %d=%s\n",
(unsigned long)*offset, errno, strerror(errno));
return -1;
}
*offset += len;
return 0;
}
void
usage(void)
{
fprintf(stderr, "usage: fardump [-v] [-m] files...\n");
fprintf(stderr, " -v : print uuids\n");
fprintf(stderr, " -m : print multiline\n");
exit(1);
}
int
main(int argc, char **argv)
{
int c;
int ret = 0;
while ((c = getopt(argc, argv, "mv")) != EOF) {
switch(c) {
case 'v':
print_binary = 1;
break;
case 'm':
print_multiline = 1;
break;
case 'h':
case '?':
usage();
}
}
if (argc < optind)
usage();
if (optind == argc)
ret = dump_file(stdin);
else while (optind < argc) {
FILE *in;
if (!strcmp(argv[optind], "-")) {
ret = dump_file(stdin);
} else {
in = fopen(argv[optind], "rb");
if (!in) {
ret = -errno;
fprintf(stderr,
"open file %s for reading failed: %s\n",
argv[optind], strerror(errno));
break;
}
ret = dump_file(in);
fclose(in);
}
if (ret)
break;
optind++;
}
exit(-ret);
}
static int
dump_file(FILE *in)
{
int ret;
unsigned char buf[BTRFS_SEND_BUF_SIZE];
struct btrfs_stream_header h;
struct btrfs_cmd_header cmd;
unsigned char *p;
extern char *optarg;
extern int optind;
off_t cmd_offset;
off_t stream_offset = 0;
cmd_offset = stream_offset;
ret = do_read(in, &h, sizeof(h), &stream_offset);
if (ret) {
printf("failed to read header\n");
goto out;
}
if (strncmp(h.magic, BTRFS_SEND_STREAM_MAGIC, sizeof(h.magic))) {
printf("bad magic\n");
goto out_ret_1;
}
if (read32(&h.version) != BTRFS_SEND_STREAM_VERSION) {
printf("invalid version %d\n", read32(&h.version));
goto out_ret_1;
}
printf("stream header, version %d\n", read32(&h.version));
while (1) {
uint32_t clen;
uint32_t crc_is;
uint32_t crc_should;
uint32_t c;
cmd_offset = stream_offset;
ret = do_read(in, &cmd, sizeof(cmd), &stream_offset);
if (ret == 1) {
ret = 0;
break;
}
if (ret) {
printf("failed to read command header (cmd @offset %lu)\n",
(unsigned long)cmd_offset);
goto out;
}
clen = read32(&cmd.len);
if (clen > sizeof(buf)) {
printf("cmd too long for buf, clen=%d (cmd @offset %lu)\n",
clen, (unsigned long)cmd_offset);
goto out_ret_1;
}
ret = do_read(in, buf, clen, &stream_offset);
if (ret) {
printf("failed to read command contents (cmd @offset %lu)\n",
(unsigned long)cmd_offset);
goto out;
}
crc_is = read32(&cmd.crc);
cmd.crc = 0;
crc_should = crc32c(0, (unsigned char *)&cmd, sizeof(cmd));
crc_should = crc32c(crc_should, buf, clen);
if (crc_is != crc_should) {
printf("crcs don't match, 0x%x != 0x%x (cmd @offset %lu)\n",
crc_is, crc_should, (unsigned long)cmd_offset);
goto out_ret_1;
}
c = read16(&cmd.cmd);
if (c < 1 || c >= MAX_CMDS) {
printf("cmd %d out of range (cmd @offset %lu)\n", c,
(unsigned long)cmd_offset);
goto out_ret_1;
}
if (print_multiline)
printf("%s\n", cmd_names[c]);
else
printf("%s: ", cmd_names[c]);
p = buf;
int first = 1;
while (clen) {
struct btrfs_tlv_header *tlv;
uint16_t type;
uint16_t len;
tlv = (struct btrfs_tlv_header *)p;
type = read16(&tlv->tlv_type);
len = read16(&tlv->tlv_len);
if (type < 1 || type >= MAX_ATTRS) {
printf("attr %d out of range (cmd @offset %lu)\n",
type, (unsigned long)cmd_offset);
goto out_ret_1;
}
if (!first && !print_multiline)
printf(", ");
first = 0;
if (print_multiline)
printf(" ");
printf("%s ", attrs[type].name);
ret = print_attr(attrs[type].type,
(void *)(tlv + 1), len);
if (ret)
goto out;
if (print_multiline)
printf("\n");
p += sizeof(*tlv) + len;
clen -= sizeof(*tlv) + len;
}
printf("\n");
}
out:
return ret;
out_ret_1:
return -1;
}