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Add more explicit warning about dedup being dropped 

"has unsupported feature: [number]" seems reasonable when we can't
know what the problem was, but with the send -D removal, we know
what it was, and can explicitly tell people "don't do that; try
this if you must".

So let's.

Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: John Kennedy <john.kennedy@delphix.com>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes #12708
This commit is contained in:
Rich Ercolani 2021-11-02 17:45:20 -04:00 committed by GitHub
parent 6d680e61ef
commit a2ffc0e025
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 18 additions and 3 deletions
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19
lib/libzfs/libzfs_sendrecv.c
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@ -5103,9 +5103,24 @@ zfs_receive_impl(libzfs_handle_t *hdl, const char *tosnap,
if (!DMU_STREAM_SUPPORTED(featureflags) ||
(hdrtype != DMU_SUBSTREAM && hdrtype != DMU_COMPOUNDSTREAM)) {
/*
* Let's be explicit about this one, since rather than
* being a new feature we can't know, it's an old
* feature we dropped.
*/
if (featureflags & DMU_BACKUP_FEATURE_DEDUP) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"stream has unsupported feature, feature flags = %llx"),
(unsigned long long)featureflags);
"stream has deprecated feature: dedup, try "
"'zstream redup [send in a file] | zfs recv "
"[...]'"));
} else {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"stream has unsupported feature, feature flags = "
"%llx (unknown flags = %llx)"),
(u_longlong_t)featureflags,
(u_longlong_t)((featureflags) &
~DMU_BACKUP_FEATURE_MASK));
}
return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
}