diff options
| author | Jeff Layton <jlayton@redhat.com> | 2013-01-28 14:41:14 -0500 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2013-02-04 09:16:24 -0500 |
| commit | a4a3ec3291249c7db0e03d8b8188ef259b2873da (patch) | |
| tree | 4e2a3e38bd63c1d59ceb56b27d56465291cad942 /fs | |
| parent | d1a0774de6cb908f5ba7806d09aaf86bb03fa182 (diff) | |
nfsd: break out hashtable search into separate function
Later, we'll need more than one call site for this, so break it out
into a new function.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfsd/nfscache.c | 46 |
1 files changed, 33 insertions, 13 deletions
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c index 634b8566aaef..b89e7c8b10ce 100644 --- a/fs/nfsd/nfscache.c +++ b/fs/nfsd/nfscache.c @@ -150,6 +150,35 @@ nfsd_cache_entry_expired(struct svc_cacherep *rp) } /* + * Search the request hash for an entry that matches the given rqstp. + * Must be called with cache_lock held. Returns the found entry or + * NULL on failure. + */ +static struct svc_cacherep * +nfsd_cache_search(struct svc_rqst *rqstp) +{ + struct svc_cacherep *rp; + struct hlist_node *hn; + struct hlist_head *rh; + __be32 xid = rqstp->rq_xid; + u32 proto = rqstp->rq_prot, + vers = rqstp->rq_vers, + proc = rqstp->rq_proc; + + rh = &cache_hash[request_hash(xid)]; + hlist_for_each_entry(rp, hn, rh, c_hash) { + if (rp->c_state != RC_UNUSED && + xid == rp->c_xid && proc == rp->c_proc && + proto == rp->c_prot && vers == rp->c_vers && + !nfsd_cache_entry_expired(rp) && + rpc_cmp_addr(svc_addr(rqstp), (struct sockaddr *)&rp->c_addr) && + rpc_get_port(svc_addr(rqstp)) == rpc_get_port((struct sockaddr *)&rp->c_addr)) + return rp; + } + return NULL; +} + +/* * Try to find an entry matching the current call in the cache. When none * is found, we grab the oldest unlocked entry off the LRU list. * Note that no operation within the loop may sleep. @@ -157,8 +186,6 @@ nfsd_cache_entry_expired(struct svc_cacherep *rp) int nfsd_cache_lookup(struct svc_rqst *rqstp) { - struct hlist_node *hn; - struct hlist_head *rh; struct svc_cacherep *rp; __be32 xid = rqstp->rq_xid; u32 proto = rqstp->rq_prot, @@ -177,17 +204,10 @@ nfsd_cache_lookup(struct svc_rqst *rqstp) spin_lock(&cache_lock); rtn = RC_DOIT; - rh = &cache_hash[request_hash(xid)]; - hlist_for_each_entry(rp, hn, rh, c_hash) { - if (rp->c_state != RC_UNUSED && - xid == rp->c_xid && proc == rp->c_proc && - proto == rp->c_prot && vers == rp->c_vers && - !nfsd_cache_entry_expired(rp) && - rpc_cmp_addr(svc_addr(rqstp), (struct sockaddr *)&rp->c_addr) && - rpc_get_port(svc_addr(rqstp)) == rpc_get_port((struct sockaddr *)&rp->c_addr)) { - nfsdstats.rchits++; - goto found_entry; - } + rp = nfsd_cache_search(rqstp); + if (rp) { + nfsdstats.rchits++; + goto found_entry; } nfsdstats.rcmisses++; |