[lvm-devel] [PATCH] Enhance stripe size validation
Zhang Zhiqing
zhangzq.fnst at cn.fujitsu.com
Tue Feb 25 09:53:55 UTC 2014
In this condition, (lp->ac_stripesize_value >= (uint64_t) vg->extent_size * 2) equals to (lp->ac_stripesize_value > (uint64_t) vg->extent_size). But the latter is concise, so I'll revise it.
Thanks,
Zhiqing, Zhang
-----Original Message-----
From: lvm-devel-bounces at redhat.com [mailto:lvm-devel-bounces at redhat.com] On Behalf Of Zdenek Kabelac
Sent: Friday, February 21, 2014 8:26 PM
To: LVM2 development
Cc: zhangzq.fnst at cn.fujitsu.com
Subject: Re: [lvm-devel] [PATCH] Enhance stripe size validation
Dne 21.2.2014 06:52, Wang Shilong napsal(a):
> From: Zhiqing Zhang <zhangzq.fnst at cn.fujitsu.com>
>
> While stripe size is twice the physical extent size, the original code
> will not reduce stripe size to maximum(physical extent size).
>
> Signed-off-by: Zhiqing Zhang <zhangzq.fnst at cn.fujitsu.com>
> ---
> lib/metadata/lv_manip.c | 2 +-
> man/lvresize.8.in | 4 +++-
> 2 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/lib/metadata/lv_manip.c b/lib/metadata/lv_manip.c index
> 2b1cdcc..14ad884 100644
> --- a/lib/metadata/lv_manip.c
> +++ b/lib/metadata/lv_manip.c
> @@ -3394,7 +3394,7 @@ static int _validate_stripesize(struct
> cmd_context *cmd,
>
> if (!(vg->fid->fmt->features & FMT_SEGMENTS))
> log_warn("Varied stripesize not supported. Ignoring.");
> - else if (lp->ac_stripesize_value > (uint64_t) vg->extent_size * 2) {
> + else if (lp->ac_stripesize_value >= (uint64_t) vg->extent_size * 2)
> +{
> log_error("Reducing stripe size %s to maximum, "
> "physical extent size %s",
> display_size(cmd,lp->ac_stripesize_value),
I assume the condition should have been:
(lp->ac_stripesize_value > (uint64_t) vg->extent_size)
Let me check what is in sectors and what has wrong units...
Zdenek
> diff --git a/man/lvresize.8.in b/man/lvresize.8.in index
> 3606762..f746307 100644
> --- a/man/lvresize.8.in
> +++ b/man/lvresize.8.in
> @@ -88,7 +88,9 @@ Defaults to whatever the last segment of the Logical Volume uses.
> Not applicable to LVs using the original metadata LVM format, which
> must use a single value throughout.
> .br
> -StripeSize must be 2^n (n = 2 to 9).
> +StripeSize must be 2^n (n = 2 to 9) for metadata in LVM1 format.
> +For metadata in LVM2 format, the stripe size may be a larger power of
> +2 but must not exceed the physical extent size.
> .TP
> .B \-\-noudevsync
> Disable udev synchronisation. The
>
--
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