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lvcreate: ensure striped raid region size is at least stripe size

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The kernel MD runtime requires region size to be larger than stripe size
on striped raid layouts, thus the dm-raid target's constructor rejects
such request.

This causes e.g. an 'lvcreate --type raid10 -i3 -I4096 -R2048 -n lv vg' to fail.

Avoid failing late in the kernel by enforcing region size to be
larger or equal to stripe size.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1698225
This commit is contained in:
Heinz Mauelshagen 2019-11-26 22:17:34 +01:00
parent 2037476008
commit 29db9c6325
2 changed files with 8 additions and 0 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.03.07 - Version 2.03.07 -
=================================== ===================================
Ensure minimum required region size on striped RaidLV creation.
Fix resize of thin-pool with data and metadata of different segtype. Fix resize of thin-pool with data and metadata of different segtype.
Improve mirror type leg splitting. Improve mirror type leg splitting.
Fix activation order when removing merged snapshot. Fix activation order when removing merged snapshot.

7
tools/lvcreate.c
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@ -575,6 +575,13 @@ static int _read_raid_params(struct cmd_context *cmd,
log_error("Minimum recovery rate cannot be higher than maximum."); log_error("Minimum recovery rate cannot be higher than maximum.");
return 0; return 0;
} }
if (lp->region_size < lp->stripe_size) {
log_print_unless_silent("Adjusting %s %s region size to required minimum of stripe size %s.",
lp->segtype->name, display_size(cmd, (uint64_t)lp->region_size),
display_size(cmd, (uint64_t)lp->stripe_size));
lp->region_size = lp->stripe_size;
}
} }
return 1; return 1;