* [PATCH] nfsd/blocklayout: Make sure calculate signature/designator length aligned
@ 2016-07-14 4:01 Kinglong Mee
2016-07-14 18:51 ` J. Bruce Fields
0 siblings, 1 reply; 2+ messages in thread
From: Kinglong Mee @ 2016-07-14 4:01 UTC (permalink / raw)
To: J. Bruce Fields; +Cc: linux-nfs, Kinglong Mee
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
---
fs/nfsd/blocklayoutxdr.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/blocklayoutxdr.c b/fs/nfsd/blocklayoutxdr.c
index 6c3b316..d72467e 100644
--- a/fs/nfsd/blocklayoutxdr.c
+++ b/fs/nfsd/blocklayoutxdr.c
@@ -43,7 +43,7 @@ nfsd4_block_encode_volume(struct xdr_stream *xdr, struct pnfs_block_volume *b)
switch (b->type) {
case PNFS_BLOCK_VOLUME_SIMPLE:
- len = 4 + 4 + 8 + 4 + b->simple.sig_len;
+ len = 4 + 4 + 8 + 4 + (XDR_QUADLEN(b->simple.sig_len) << 2);
p = xdr_reserve_space(xdr, len);
if (!p)
return -ETOOSMALL;
@@ -54,7 +54,7 @@ nfsd4_block_encode_volume(struct xdr_stream *xdr, struct pnfs_block_volume *b)
p = xdr_encode_opaque(p, b->simple.sig, b->simple.sig_len);
break;
case PNFS_BLOCK_VOLUME_SCSI:
- len = 4 + 4 + 4 + 4 + b->scsi.designator_len + 8;
+ len = 4 + 4 + 4 + 4 + (XDR_QUADLEN(b->scsi.designator_len) << 2) + 8;
p = xdr_reserve_space(xdr, len);
if (!p)
return -ETOOSMALL;
--
2.7.4
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] nfsd/blocklayout: Make sure calculate signature/designator length aligned
2016-07-14 4:01 [PATCH] nfsd/blocklayout: Make sure calculate signature/designator length aligned Kinglong Mee
@ 2016-07-14 18:51 ` J. Bruce Fields
0 siblings, 0 replies; 2+ messages in thread
From: J. Bruce Fields @ 2016-07-14 18:51 UTC (permalink / raw)
To: Kinglong Mee; +Cc: linux-nfs
Looks to me like sig_len and designator_len can only be multiples of 4,
so there's no change in behavior here.
But, it's probably safer to do this anyway. I'll apply with a note in
the changelog.
--b.
On Thu, Jul 14, 2016 at 12:01:17PM +0800, Kinglong Mee wrote:
>
> Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
> ---
> fs/nfsd/blocklayoutxdr.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/fs/nfsd/blocklayoutxdr.c b/fs/nfsd/blocklayoutxdr.c
> index 6c3b316..d72467e 100644
> --- a/fs/nfsd/blocklayoutxdr.c
> +++ b/fs/nfsd/blocklayoutxdr.c
> @@ -43,7 +43,7 @@ nfsd4_block_encode_volume(struct xdr_stream *xdr, struct pnfs_block_volume *b)
>
> switch (b->type) {
> case PNFS_BLOCK_VOLUME_SIMPLE:
> - len = 4 + 4 + 8 + 4 + b->simple.sig_len;
> + len = 4 + 4 + 8 + 4 + (XDR_QUADLEN(b->simple.sig_len) << 2);
> p = xdr_reserve_space(xdr, len);
> if (!p)
> return -ETOOSMALL;
> @@ -54,7 +54,7 @@ nfsd4_block_encode_volume(struct xdr_stream *xdr, struct pnfs_block_volume *b)
> p = xdr_encode_opaque(p, b->simple.sig, b->simple.sig_len);
> break;
> case PNFS_BLOCK_VOLUME_SCSI:
> - len = 4 + 4 + 4 + 4 + b->scsi.designator_len + 8;
> + len = 4 + 4 + 4 + 4 + (XDR_QUADLEN(b->scsi.designator_len) << 2) + 8;
> p = xdr_reserve_space(xdr, len);
> if (!p)
> return -ETOOSMALL;
> --
> 2.7.4
^ permalink raw reply [flat|nested] 2+ messages in thread
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