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nfsd41: non-page DRC for solo sequence responses

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A session inactivity time compound (lease renewal) or a compound where the
sequence operation has sa_cachethis set to FALSE do not require any pages
to be held in the v4.1 DRC. This is because struct nfsd4_slot is already
caching the session information.

Add logic to the nfs41 server to not cache response pages for solo sequence
responses.

Return nfserr_replay_uncached_rep on the operation following the sequence
operation when sa_cachethis is FALSE.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfsd41: use cstate session in nfsd4_replay_cache_entry]
[nfsd41: rename nfsd4_no_page_in_cache]
[nfsd41 rename nfsd4_enc_no_page_replay]
[nfsd41 nfsd4_is_solo_sequence]
[nfsd41 change nfsd4_not_cached return]
Signed-off-by: Andy Adamson <andros@netapp.com>
[changed return type to bool]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfsd41 drop parens in nfsd4_is_solo_sequence call]
Signed-off-by: Andy Adamson <andros@netapp.com>
[changed "== 0" to "!"]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Andy Adamson
2009-04-03 08:28:35 +03:00
committed by J. Bruce Fields
parent 38eb76a54d
commit bf864a31d5
5 changed files with 91 additions and 11 deletions
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1
include/linux/nfsd/state.h
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@@ -110,6 +110,7 @@ struct nfsd4_cache_entry {
__be32 ce_status;
struct kvec ce_datav; /* encoded NFSv4.1 data in rq_res.head[0] */
struct page *ce_respages[NFSD_PAGES_PER_SLOT + 1];
int ce_cachethis;
short ce_resused;
int ce_opcnt;
int ce_rpchdrlen;