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authorChristoph Hellwig <hch@lst.de>2015-10-09 15:03:26 +0200
committerJ. Bruce Fields <bfields@redhat.com>2015-10-09 16:11:40 -0400
commit8c3ad9cb7343dc5f61b8cf3cdbe1016c5e7c2c8b (patch)
tree3da3578adea31cc917590e79499b4349eb03e741 /fs/nfsd/blocklayout.c
parentc91aed9896946721bb30705ea2904edb3725dd61 (diff)
downloadlinux-8c3ad9cb7343dc5f61b8cf3cdbe1016c5e7c2c8b.tar.gz
nfsd/blocklayout: accept any minlength
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.

Cc: stable@vger.kernel.org
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd/blocklayout.c')
-rw-r--r--fs/nfsd/blocklayout.c8
1 files changed, 0 insertions, 8 deletions
diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
index cdefaa331a07..c29d9421bd5e 100644
--- a/fs/nfsd/blocklayout.c
+++ b/fs/nfsd/blocklayout.c
@@ -56,14 +56,6 @@ nfsd4_block_proc_layoutget(struct inode *inode, const struct svc_fh *fhp,
 	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;