diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfsd/nfs4state.c | 41 |
1 files changed, 26 insertions, 15 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index aecafb2e4056..3f572cb3f896 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -250,7 +250,7 @@ unhash_delegation(struct nfs4_delegation *dp) * SETCLIENTID state */ -/* client_lock protects the session hash table */ +/* client_lock protects the client lru list and session hash table */ static DEFINE_SPINLOCK(client_lock); /* Hash tables for nfs4_clientid state */ @@ -628,8 +628,9 @@ free_session(struct kref *kref) kfree(ses); } +/* must be called under the client_lock */ static inline void -renew_client(struct nfs4_client *clp) +renew_client_locked(struct nfs4_client *clp) { /* * Move client to the end to the LRU list. @@ -641,6 +642,14 @@ renew_client(struct nfs4_client *clp) clp->cl_time = get_seconds(); } +static inline void +renew_client(struct nfs4_client *clp) +{ + spin_lock(&client_lock); + renew_client_locked(clp); + spin_unlock(&client_lock); +} + /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ static int STALE_CLIENTID(clientid_t *clid) @@ -706,14 +715,14 @@ expire_client(struct nfs4_client *clp) list_del_init(&dp->dl_recall_lru); unhash_delegation(dp); } - list_del(&clp->cl_idhash); - list_del(&clp->cl_strhash); - list_del(&clp->cl_lru); while (!list_empty(&clp->cl_openowners)) { sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); release_openowner(sop); } + list_del(&clp->cl_idhash); + list_del(&clp->cl_strhash); spin_lock(&client_lock); + list_del(&clp->cl_lru); while (!list_empty(&clp->cl_sessions)) { struct nfsd4_session *ses; ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, @@ -848,8 +857,7 @@ add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); idhashval = clientid_hashval(clp->cl_clientid.cl_id); list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); - list_add_tail(&clp->cl_lru, &client_lru); - clp->cl_time = get_seconds(); + renew_client(clp); } static void @@ -1447,15 +1455,12 @@ nfsd4_sequence(struct svc_rqst *rqstp, out: /* Hold a session reference until done processing the compound. */ - if (cstate->session) - nfsd4_get_session(cstate->session); - spin_unlock(&client_lock); - /* Renew the clientid on success and on replay */ if (cstate->session) { - nfs4_lock_state(); - renew_client(session->se_client); - nfs4_unlock_state(); + nfsd4_get_session(cstate->session); + /* Renew the clientid on success and on replay */ + renew_client_locked(session->se_client); } + spin_unlock(&client_lock); dprintk("%s: return %d\n", __func__, ntohl(status)); return status; } @@ -2564,6 +2569,8 @@ nfs4_laundromat(void) dprintk("NFSD: laundromat service - starting\n"); if (locks_in_grace()) nfsd4_end_grace(); + INIT_LIST_HEAD(&reaplist); + spin_lock(&client_lock); list_for_each_safe(pos, next, &client_lru) { clp = list_entry(pos, struct nfs4_client, cl_lru); if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { @@ -2572,12 +2579,16 @@ nfs4_laundromat(void) clientid_val = t; break; } + list_move(&clp->cl_lru, &reaplist); + } + spin_unlock(&client_lock); + list_for_each_safe(pos, next, &reaplist) { + clp = list_entry(pos, struct nfs4_client, cl_lru); dprintk("NFSD: purging unused client (clientid %08x)\n", clp->cl_clientid.cl_id); nfsd4_remove_clid_dir(clp); expire_client(clp); } - INIT_LIST_HEAD(&reaplist); spin_lock(&recall_lock); list_for_each_safe(pos, next, &del_recall_lru) { dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |