Simple tool to parse a fits-stream from stdout.
Signed-off-by: Arne Jansen <sensi...@gmx.net>
---
The idea of the btrfs send stream format was to generate it in a way that
it is easy to receive on different platforms. Thus the proposed name FITS, for
Filesystem Incremental Backup Stream. We should also build the tools to
receive the stream on different platforms.
As a place to collect those I created at git at
git://git.kernel.org/pub/scm/linux/kernel/git/arne/fits-progs.git
---
Makefile | 4 +
fitsparse.c | 402 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 406 insertions(+), 0 deletions(-)
create mode 100644 Makefile
create mode 100644 fitsparse.c
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..1c56476
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,4 @@
+all: fitsparse
+
+fitsparse: fitsparse.c
+ gcc -Wall fitsparse.c -o fitsparse
diff --git a/fitsparse.c b/fitsparse.c
new file mode 100644
index 0000000..3a52250
--- /dev/null
+++ b/fitsparse.c
@@ -0,0 +1,402 @@
+/*
+ * 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>
+
+int print_binary = 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))
+
+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 + 2);
+}
+
+/*
+ * 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;
+
+ 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(void *buf, int len)
+{
+ int ret;
+
+ if (len == 0)
+ return 0;
+
+ ret = fread(buf, 1, len, stdin);
+ if (ret == 0)
+ return 1;
+
+ if (ret != len) {
+ printf("read error on stdin: %d=%s\n", errno, strerror(errno));
+ return -1;
+ }
+ return 0;
+}
+
+int
+main(int argc, char **argv)
+{
+ int ret;
+ unsigned char buf[BTRFS_SEND_BUF_SIZE];
+ struct btrfs_stream_header h;
+ struct btrfs_cmd_header cmd;
+ unsigned char *p;
+
+ if (argc == 2 && strcmp(argv[1], "-v") == 0)
+ print_binary = 1;
+
+ ret = do_read(&h, sizeof(h));
+ 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;
+ }
+ if (read32(&h.version) != BTRFS_SEND_STREAM_VERSION) {
+ printf("invalid version %d\n", read32(&h.version));
+ goto out;
+ }
+ 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;
+
+ ret = do_read(&cmd, sizeof(cmd));
+ if (ret == 1)
+ break;
+ if (ret) {
+ printf("failed to read command header\n");
+ goto out;
+ }
+ clen = read32(&cmd.len);
+ if (clen > sizeof(buf)) {
+ printf("cmd too long for buf, clen=%d\n", clen);
+ goto out;
+ }
+ ret = do_read(buf, clen);
+ if (ret) {
+ printf("failed to read command contents\n");
+ 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\n",
+ crc_is, crc_should);
+ goto out;
+ }
+ c = read16(&cmd.cmd);
+ if (c < 1 || c >= MAX_CMDS) {
+ printf("cmd %d out of range\n", c);
+ goto out;
+ }
+ 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\n", type);
+ goto out;
+ }
+ if (!first)
+ printf(", ");
+ first = 0;
+
+ printf("%s ", attrs[type].name);
+ ret = print_attr(attrs[type].type,
+ (void *)(tlv + 1), len);
+ if (ret)
+ goto out;
+
+ p += sizeof(*tlv) + len;
+ clen -= sizeof(*tlv) + len;
+ }
+ printf("\n");
+ }
+
+out:
+ exit(0);
+}
--
1.7.7
--
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