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Add a "zstream decompress" subcommand

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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
This commit is contained in:
Alan Somers
2022-06-24 14:28:42 -06:00
committed by GitHub
parent 1c0c729ab4
commit ccf89b39fe
7 changed files with 425 additions and 5 deletions
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cmd/zstream/zstream.c
+4
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@@ -40,6 +40,8 @@ zstream_usage(void)
"\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");
@@ -61,6 +63,8 @@ main(int argc, char *argv[])
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) {