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3 Commits

Author SHA1 Message Date
Christoph Hellwig
40cdc7a530 nfsd/blocklayout: pretend we can send deviceid notifications 
Commit df52699e4f ("NFSv4.1: Don't cache deviceids that have no
notifications") causes the Linux NFS client to stop caching deviceid's
unless a server pretends to support deviceid notifications.  While this
behavior is stupid and the language around this area in rfc5661 is a
mess carified by an errata that I submittted, Trond insists on this
behavior.  Not caching deviceids degrades block layout performance
massively as a GETDEVICEINFO is fairly expensive.

So add this hack to make the Linux client happy again.

Cc: stable@vger.kernel.org
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
 2015-05-04 12:02:37 -04:00
Kinglong Mee
853695230e NFSD: Printk blocklayout length and offset as format 0x%llx 
When testing pnfs with nfsd_debug on, nfsd print a negative number
of layout length and foff in nfsd4_block_proc_layoutget as,
"GET: -xxxx:-xxx 2"

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
 2015-03-25 21:13:02 -04:00
Christoph Hellwig
8650b8a058 nfsd: pNFS block layout driver 
Add a small shim between core nfsd and filesystems to translate the
somewhat cumbersome pNFS data structures and semantics to something
more palatable for Linux filesystems.

Thanks to Rick McNeal for the old prototype pNFS blocklayout server
code, which gave a lot of inspiration to this version even if no
code is left from it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
 2015-02-05 14:35:18 +01:00