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nfsd41: expand solo sequence check 

Compounds consisting of only a sequence operation don't need any
additional caching beyond the sequence information we store in the slot
entry.  Fix nfsd4_is_solo_sequence to identify this case correctly.

The additional check for a failed sequence in nfsd4_store_cache_entry()
is redundant, since the nfsd4_is_solo_sequence call lower down catches
this case.

The final ce_cachethis set in nfsd4_sequence is also redundant.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Andy Adamson 2009-08-27 12:07:40 -04:00 committed by J. Bruce Fields
parent d8d0b85b11
commit 468de9e54a
2 changed files with 1 additions and 10 deletions
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9
fs/nfsd/nfs4state.c
View File

@ -991,16 +991,10 @@ nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
{
struct nfsd4_cache_entry *entry = &resp->cstate.slot->sl_cache_entry;
struct svc_rqst *rqstp = resp->rqstp;
struct nfsd4_compoundargs *args = rqstp->rq_argp;
struct nfsd4_op *op = &args->ops[resp->opcnt];
struct kvec *resv = &rqstp->rq_res.head[0];
dprintk("--> %s entry %p\n", __func__, entry);
/* Don't cache a failed OP_SEQUENCE. */
if (resp->opcnt == 1 && op->opnum == OP_SEQUENCE && resp->cstate.status)
return;
nfsd4_release_respages(entry->ce_respages, entry->ce_resused);
entry->ce_opcnt = resp->opcnt;
entry->ce_status = resp->cstate.status;
@ -1490,9 +1484,6 @@ nfsd4_sequence(struct svc_rqst *rqstp,
slot->sl_inuse = true;
slot->sl_seqid = seq->seqid;
slot->sl_cache_entry.ce_cachethis = seq->cachethis;
/* Always set the cache entry cachethis for solo sequence */
if (nfsd4_is_solo_sequence(resp))
slot->sl_cache_entry.ce_cachethis = 1;
cstate->slot = slot;
cstate->session = session;

2
include/linux/nfsd/xdr4.h
View File

@ -467,7 +467,7 @@ struct nfsd4_compoundres {
static inline bool nfsd4_is_solo_sequence(struct nfsd4_compoundres *resp)
{
struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
return args->opcnt == 1;
return resp->opcnt == 1 && args->ops[0].opnum == OP_SEQUENCE;
}
static inline bool nfsd4_not_cached(struct nfsd4_compoundres *resp)