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authorAndy Adamson <andros@netapp.com>2009-04-03 01:28:35 -0400
committerJ. Bruce Fields <bfields@citi.umich.edu>2009-04-03 20:41:19 -0400
commitbf864a31d50e3e94d6e76537b97d664913906ff8 (patch)
tree8de829d0cdc0c88fe523fc4a288b8e16eedc6a2e /include/linux/nfsd
parent38eb76a54d803e6792816623651b1a9cb85f8d01 (diff)
nfsd41: non-page DRC for solo sequence responses
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>
Diffstat (limited to 'include/linux/nfsd')
-rw-r--r--include/linux/nfsd/state.h1
-rw-r--r--include/linux/nfsd/xdr4.h15
2 files changed, 15 insertions, 1 deletions
diff --git a/include/linux/nfsd/state.h b/include/linux/nfsd/state.h
index f063df7ad134..18dcffa57f77 100644
--- a/include/linux/nfsd/state.h
+++ b/include/linux/nfsd/state.h
@@ -110,6 +110,7 @@ struct nfsd4_cache_entry {
110 __be32 ce_status; 110 __be32 ce_status;
111 struct kvec ce_datav; /* encoded NFSv4.1 data in rq_res.head[0] */ 111 struct kvec ce_datav; /* encoded NFSv4.1 data in rq_res.head[0] */
112 struct page *ce_respages[NFSD_PAGES_PER_SLOT + 1]; 112 struct page *ce_respages[NFSD_PAGES_PER_SLOT + 1];
113 int ce_cachethis;
113 short ce_resused; 114 short ce_resused;
114 int ce_opcnt; 115 int ce_opcnt;
115 int ce_rpchdrlen; 116 int ce_rpchdrlen;
diff --git a/include/linux/nfsd/xdr4.h b/include/linux/nfsd/xdr4.h
index 9468829adb70..486188810a60 100644
--- a/include/linux/nfsd/xdr4.h
+++ b/include/linux/nfsd/xdr4.h
@@ -480,6 +480,18 @@ struct nfsd4_compoundres {
480 struct nfsd4_compound_state cstate; 480 struct nfsd4_compound_state cstate;
481}; 481};
482 482
483static inline bool nfsd4_is_solo_sequence(struct nfsd4_compoundres *resp)
484{
485 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
486 return args->opcnt == 1;
487}
488
489static inline bool nfsd4_not_cached(struct nfsd4_compoundres *resp)
490{
491 return !resp->cstate.slot->sl_cache_entry.ce_cachethis ||
492 nfsd4_is_solo_sequence(resp);
493}
494
483#define NFS4_SVC_XDRSIZE sizeof(struct nfsd4_compoundargs) 495#define NFS4_SVC_XDRSIZE sizeof(struct nfsd4_compoundargs)
484 496
485static inline void 497static inline void
@@ -510,7 +522,8 @@ extern __be32 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
510 struct nfsd4_compound_state *, 522 struct nfsd4_compound_state *,
511 struct nfsd4_setclientid_confirm *setclientid_confirm); 523 struct nfsd4_setclientid_confirm *setclientid_confirm);
512extern void nfsd4_store_cache_entry(struct nfsd4_compoundres *resp); 524extern void nfsd4_store_cache_entry(struct nfsd4_compoundres *resp);
513extern __be32 nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp); 525extern __be32 nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
526 struct nfsd4_sequence *seq);
514extern __be32 nfsd4_exchange_id(struct svc_rqst *rqstp, 527extern __be32 nfsd4_exchange_id(struct svc_rqst *rqstp,
515 struct nfsd4_compound_state *, 528 struct nfsd4_compound_state *,
516struct nfsd4_exchange_id *); 529struct nfsd4_exchange_id *);