mirror_zfs/cmd/zstream/zstream.c
Alan Somers ccf89b39fe
Add a "zstream decompress" subcommand
It can be used to repair a ZFS file system corrupted by ZFS bug #12762.
Use it like this:

zfs send -c <DS> | \
zstream decompress <OBJECT>,<OFFSET>[,<COMPRESSION_ALGO>] ... | \
zfs recv <DST_DS>

Reviewed-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Allan Jude <allan@klarasystems.com>
Signed-off-by: Alan Somers <asomers@gmail.com>
Sponsored-by:  Axcient
Workaround for #12762
Closes #13256
2022-06-24 13:28:42 -07:00

76 lines
1.9 KiB
C

/*
* CDDL HEADER START
*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2020 by Delphix. All rights reserved.
* Copyright (c) 2020 by Datto Inc. All rights reserved.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libintl.h>
#include <stddef.h>
#include <libzfs.h>
#include "zstream.h"
void
zstream_usage(void)
{
(void) fprintf(stderr,
"usage: zstream command args ...\n"
"Available commands are:\n"
"\n"
"\tzstream dump [-vCd] FILE\n"
"\t... | zstream dump [-vCd]\n"
"\n"
"\tzstream decompress [-v] [OBJECT,OFFSET[,TYPE]] ...\n"
"\n"
"\tzstream token resume_token\n"
"\n"
"\tzstream redup [-v] FILE | ...\n");
exit(1);
}
int
main(int argc, char *argv[])
{
char *basename = strrchr(argv[0], '/');
basename = basename ? (basename + 1) : argv[0];
if (argc >= 1 && strcmp(basename, "zstreamdump") == 0)
return (zstream_do_dump(argc, argv));
if (argc < 2)
zstream_usage();
char *subcommand = argv[1];
if (strcmp(subcommand, "dump") == 0) {
return (zstream_do_dump(argc - 1, argv + 1));
} else if (strcmp(subcommand, "decompress") == 0) {
return (zstream_do_decompress(argc - 1, argv + 1));
} else if (strcmp(subcommand, "token") == 0) {
return (zstream_do_token(argc - 1, argv + 1));
} else if (strcmp(subcommand, "redup") == 0) {
return (zstream_do_redup(argc - 1, argv + 1));
} else {
zstream_usage();
}
}