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Relax (ref)reservation constraints on ZVOLs

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This change allow (ref)reservation to be set larger than the current
ZVOL size: this is safe as we normally set refreservation > volsize
at ZVOL creation time when we account for metadata.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed by: Richard Elling <Richard.Elling@RichardElling.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Signed-off-by: loli10K <ezomori.nozomu@gmail.com>
Closes #2468 
Closes #6610
This commit is contained in:
LOLi
2017-09-12 20:33:22 +02:00
committed by Brian Behlendorf
parent d9549cba96
commit ded8f06a3c
4 changed files with 24 additions and 51 deletions
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lib/libzfs/libzfs_dataset.c
-14
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@@ -1451,25 +1451,11 @@ badlabel:
* checks to enforce.
*/
if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
uint64_t volsize = zfs_prop_get_int(zhp,
ZFS_PROP_VOLSIZE);
uint64_t blocksize = zfs_prop_get_int(zhp,
ZFS_PROP_VOLBLOCKSIZE);
char buf[64];
switch (prop) {
case ZFS_PROP_RESERVATION:
case ZFS_PROP_REFRESERVATION:
if (intval > volsize) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"'%s' is greater than current "
"volume size"), propname);
(void) zfs_error(hdl, EZFS_BADPROP,
errbuf);
goto error;
}
break;
case ZFS_PROP_VOLSIZE:
if (intval % blocksize != 0) {
zfs_nicebytes(blocksize, buf,