This is a note to let you know that I've just added the patch titled
nfsd/blocklayout: accept any minlength
to the 4.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nfsd-blocklayout-accept-any-minlength.patch
and it can be found in the queue-4.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8c3ad9cb7343dc5f61b8cf3cdbe1016c5e7c2c8b Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@xxxxxx>
Date: Fri, 9 Oct 2015 15:03:26 +0200
Subject: nfsd/blocklayout: accept any minlength
From: Christoph Hellwig <hch@xxxxxx>
commit 8c3ad9cb7343dc5f61b8cf3cdbe1016c5e7c2c8b upstream.
Recent Linux clients have started to send GETLAYOUT requests with
minlength less than blocksize.
Servers aren't really allowed to impose this kind of restriction on
layouts; see RFC 5661 section 18.43.3 for details.
This has been observed to cause indefinite hangs on fsx runs on some
clients.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/nfsd/blocklayout.c | 8 --------
1 file changed, 8 deletions(-)
--- a/fs/nfsd/blocklayout.c
+++ b/fs/nfsd/blocklayout.c
@@ -56,14 +56,6 @@ nfsd4_block_proc_layoutget(struct inode
u32 device_generation = 0;
int error;
- /*
- * We do not attempt to support I/O smaller than the fs block size,
- * or not aligned to it.
- */
- if (args->lg_minlength < block_size) {
- dprintk("pnfsd: I/O too small\n");
- goto out_layoutunavailable;
- }
if (seg->offset & (block_size - 1)) {
dprintk("pnfsd: I/O misaligned\n");
goto out_layoutunavailable;
Patches currently in stable-queue which might be from hch@xxxxxx are
queue-4.2/nfsd-blocklayout-accept-any-minlength.patch
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