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Increase allowed 'special_small_blocks' maximum value

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There may be circumstances where it's desirable that all blocks
in a specified dataset be stored on the special device.  Relax
the artificial 128K limit and allow the special_small_blocks
property to be set up to 1M.  When blocks >1MB have been enabled
via the zfs_max_recordsize module option, this limit is increased
accordingly.

Reviewed-by: Don Brady <don.brady@delphix.com>
Reviewed-by: Kjeld Schouten <kjeld@schouten-lebbing.nl>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #9131
Closes #9355
This commit is contained in:
Brian Behlendorf
2019-12-03 09:58:03 -08:00
committed by Tony Hutter
parent 85204e30dd
commit 9cf46ddedc
4 changed files with 17 additions and 7 deletions
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lib/libzfs/libzfs_dataset.c
+13 -4
View File
@@ -1230,12 +1230,19 @@ zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
}
case ZFS_PROP_SPECIAL_SMALL_BLOCKS:
{
int maxbs = SPA_OLD_MAXBLOCKSIZE;
char buf[64];
if (zpool_hdl != NULL) {
char state[64] = "";
maxbs = zpool_get_prop_int(zpool_hdl,
ZPOOL_PROP_MAXBLOCKSIZE, NULL);
/*
* Issue a warning but do not fail so that
* tests for setable properties succeed.
* tests for settable properties succeed.
*/
if (zpool_prop_get_feature(zpool_hdl,
"feature@allocation_classes", state,
@@ -1248,15 +1255,17 @@ zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
}
if (intval != 0 &&
(intval < SPA_MINBLOCKSIZE ||
intval > SPA_OLD_MAXBLOCKSIZE || !ISP2(intval))) {
intval > maxbs || !ISP2(intval))) {
zfs_nicebytes(maxbs, buf, sizeof (buf));
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"invalid '%s=%d' property: must be zero or "
"a power of 2 from 512B to 128K"), propname,
intval);
"a power of 2 from 512B to %s"), propname,
intval, buf);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
}
break;
}
case ZFS_PROP_MLSLABEL:
{