From b79abaddfe7ef29e00d71721cf03a33e00d53317 Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Mon, 22 Aug 2011 18:01:43 -0400 Subject: [PATCH] nfsd4: consolidate lock & open stateid tables There's no reason to have two separate hash tables for open and lock stateid's. Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs4state.c | 63 +++++++++++---------------------------------- 1 file changed, 15 insertions(+), 48 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 7de214b860d..0198328c0e8 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -61,7 +61,6 @@ static u64 current_sessionid = 1; /* forward declarations */ static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); -static struct nfs4_stateid * search_for_stateid(stateid_t *stid); static struct nfs4_delegation * search_for_delegation(stateid_t *stid); static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); static int check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner); @@ -3211,7 +3210,7 @@ __be32 nfs4_validate_stateid(stateid_t *stateid, bool has_session) goto out; status = nfserr_expired; - stp = search_for_stateid(stateid); + stp = find_stateid(stateid, 0); if (!stp) goto out; status = nfserr_bad_stateid; @@ -3349,7 +3348,7 @@ nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, goto out; } - stp = search_for_stateid(stateid); + stp = find_stateid(stateid, 0); if (!stp) { ret = nfserr_bad_stateid; goto out; @@ -3718,7 +3717,6 @@ lock_ownerstr_hashval(struct inode *inode, u32 cl_id, static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; -static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; static int same_stateid(stateid_t *id_one, stateid_t *id_two) @@ -3728,50 +3726,21 @@ same_stateid(stateid_t *id_one, stateid_t *id_two) return id_one->si_fileid == id_two->si_fileid; } -static struct nfs4_stateid * -find_stateid(stateid_t *stid, int flags) +static struct nfs4_stateid *find_stateid(stateid_t *t, int flags) { - struct nfs4_stateid *local; - u32 st_id = stid->si_stateownerid; - u32 f_id = stid->si_fileid; + struct nfs4_stateid *s; unsigned int hashval; - dprintk("NFSD: find_stateid flags 0x%x\n",flags); - if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { - hashval = stateid_hashval(st_id, f_id); - list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { - if ((local->st_stateid.si_stateownerid == st_id) && - (local->st_stateid.si_fileid == f_id)) - return local; - } - } - - if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { - hashval = stateid_hashval(st_id, f_id); - list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { - if ((local->st_stateid.si_stateownerid == st_id) && - (local->st_stateid.si_fileid == f_id)) - return local; + hashval = stateid_hashval(t->si_stateownerid, t->si_fileid); + list_for_each_entry(s, &stateid_hashtbl[hashval], st_hash) { + if (!same_stateid(&s->st_stateid, t)) + continue; + if (flags & LOCK_STATE && s->st_type != NFS4_LOCK_STID) + return NULL; + if (flags & OPEN_STATE && s->st_type != NFS4_OPEN_STID) + return NULL; + return s; } - } - return NULL; -} - -static struct nfs4_stateid * -search_for_stateid(stateid_t *stid) -{ - struct nfs4_stateid *local; - unsigned int hashval = stateid_hashval(stid->si_stateownerid, stid->si_fileid); - - list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { - if (same_stateid(&local->st_stateid, stid)) - return local; - } - - list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { - if (same_stateid(&local->st_stateid, stid)) - return local; - } return NULL; } @@ -3920,7 +3889,7 @@ alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struc INIT_LIST_HEAD(&stp->st_perfile); INIT_LIST_HEAD(&stp->st_perstateowner); INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ - list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); + list_add(&stp->st_hash, &stateid_hashtbl[hashval]); list_add(&stp->st_perfile, &fp->fi_stateids); list_add(&stp->st_perstateowner, &sop->so_stateids); stp->st_stateowner = sop; @@ -4497,10 +4466,8 @@ nfs4_state_init(void) INIT_LIST_HEAD(&open_ownerstr_hashtbl[i]); INIT_LIST_HEAD(&open_ownerid_hashtbl[i]); } - for (i = 0; i < STATEID_HASH_SIZE; i++) { + for (i = 0; i < STATEID_HASH_SIZE; i++) INIT_LIST_HEAD(&stateid_hashtbl[i]); - INIT_LIST_HEAD(&lockstateid_hashtbl[i]); - } for (i = 0; i < LOCK_HASH_SIZE; i++) { INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); -- 2.46.0