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OpenZFS 8906 - uts: illumos rootfs should support salted cksum

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Porting notes:
* As of grub-2.02 these checksums are not supported.  However, as
  pointed out in #6501 there are alternatives such as EFISTUB which
  work and have no such restriction.  A warning was added to the
  checksum property section of the zfs.8 man page.

Authored by: Toomas Soome <tsoome@me.com>
Reviewed by: C Fraire <cfraire@me.com>
Reviewed by: Robert Mustacchi <rm@joyent.com>
Reviewed by: Yuri Pankov <yuripv@yuripv.net>
Approved by: Dan McDonald <danmcd@joyent.com>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>

OpenZFS-issue: https://illumos.org/issues/8906
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/7dec52f
Closes #6501
Closes #7714
This commit is contained in:
Toomas Soome 2016-06-01 19:18:10 +03:00 committed by Tony Hutter
parent 6857950e46
commit 1bd93ea1e0
3 changed files with 12 additions and 22 deletions
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18
man/man5/zpool-features.5
View File

@ -14,7 +14,7 @@
.\" CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your .\" CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your
.\" own identifying information: .\" own identifying information:
.\" Portions Copyright [yyyy] [name of copyright owner] .\" Portions Copyright [yyyy] [name of copyright owner]
.TH ZPOOL-FEATURES 5 "Aug 27, 2013" .TH ZPOOL-FEATURES 5 "Jun 8, 2018"
.SH NAME .SH NAME
zpool\-features \- ZFS pool feature descriptions zpool\-features \- ZFS pool feature descriptions
.SH DESCRIPTION .SH DESCRIPTION
@ -248,8 +248,9 @@ immediately activate the \fBlz4_compress\fR feature on the underlying
pool using the \fBzfs\fR(1M) command. Also, all newly written metadata pool using the \fBzfs\fR(1M) command. Also, all newly written metadata
will be compressed with \fBlz4\fR algorithm. Since this feature is not will be compressed with \fBlz4\fR algorithm. Since this feature is not
read-only compatible, this operation will render the pool unimportable read-only compatible, this operation will render the pool unimportable
on systems without support for the \fBlz4_compress\fR feature. Booting on systems without support for the \fBlz4_compress\fR feature.
off of \fBlz4\fR-compressed root pools is supported.
Booting off of \fBlz4\fR-compressed root pools is supported.
This feature becomes \fBactive\fR as soon as it is enabled and will This feature becomes \fBactive\fR as soon as it is enabled and will
never return to being \fBenabled\fB. never return to being \fBenabled\fB.
@ -510,8 +511,7 @@ can turn on the \fBsha512\fR checksum on any dataset using the
and will return to being \fBenabled\fR once all filesystems that have and will return to being \fBenabled\fR once all filesystems that have
ever had their checksum set to \fBsha512\fR are destroyed. ever had their checksum set to \fBsha512\fR are destroyed.
Booting off of pools utilizing SHA-512/256 is supported (provided that Booting off of pools utilizing SHA-512/256 is supported.
the updated GRUB stage2 module is installed).
.RE .RE
@ -545,9 +545,7 @@ can turn on the \fBskein\fR checksum on any dataset using the
and will return to being \fBenabled\fR once all filesystems that have and will return to being \fBenabled\fR once all filesystems that have
ever had their checksum set to \fBskein\fR are destroyed. ever had their checksum set to \fBskein\fR are destroyed.
Booting off of pools using \fBskein\fR is \fBNOT\fR supported Booting off of pools using \fBskein\fR is supported.
-- any attempt to enable \fBskein\fR on a root pool will fail with an
error.
.RE .RE
@ -587,9 +585,7 @@ can turn on the \fBedonr\fR checksum on any dataset using the
and will return to being \fBenabled\fR once all filesystems that have and will return to being \fBenabled\fR once all filesystems that have
ever had their checksum set to \fBedonr\fR are destroyed. ever had their checksum set to \fBedonr\fR are destroyed.
Booting off of pools using \fBedonr\fR is \fBNOT\fR supported Booting off of pools using \fBedonr\fR is supported.
-- any attempt to enable \fBedonr\fR on a root pool will fail with an
error.
.RE .RE

5
man/man8/zfs.8
View File

@ -29,7 +29,7 @@
.\" Copyright 2016 Nexenta Systems, Inc. .\" Copyright 2016 Nexenta Systems, Inc.
.\" Copyright 2016 Richard Laager. All rights reserved. .\" Copyright 2016 Richard Laager. All rights reserved.
.\" .\"
.Dd June 28, 2017 .Dd July 13, 2018
.Dt ZFS 8 SMM .Dt ZFS 8 SMM
.Os Linux .Os Linux
.Sh NAME .Sh NAME
@ -1049,6 +1049,9 @@ The
and and
.Sy edonr .Sy edonr
checksum algorithms require enabling the appropriate features on the pool. checksum algorithms require enabling the appropriate features on the pool.
These algorithms are not supported by GRUB and should not be set on the
.Sy bootfs
filesystem when using GRUB to boot the system.
Please see Please see
.Xr zpool-features 5 .Xr zpool-features 5
for more information on these algorithms. for more information on these algorithms.

11
module/zfs/zfs_ioctl.c
View File

@ -3985,16 +3985,7 @@ zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
if ((err = spa_open(dsname, &spa, FTAG)) != 0) if ((err = spa_open(dsname, &spa, FTAG)) != 0)
return (err); return (err);
/*
* Salted checksums are not supported on root pools.
*/
if (spa_bootfs(spa) != 0 &&
intval < ZIO_CHECKSUM_FUNCTIONS &&
(zio_checksum_table[intval].ci_flags &
ZCHECKSUM_FLAG_SALTED)) {
spa_close(spa, FTAG);
return (SET_ERROR(ERANGE));
}
if (!spa_feature_is_enabled(spa, feature)) { if (!spa_feature_is_enabled(spa, feature)) {
spa_close(spa, FTAG); spa_close(spa, FTAG);
return (SET_ERROR(ENOTSUP)); return (SET_ERROR(ENOTSUP));