Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-qg0-f50.google.com ([209.85.192.50]:50311 "EHLO mail-qg0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932332AbaGUPDi (ORCPT ); Mon, 21 Jul 2014 11:03:38 -0400 Received: by mail-qg0-f50.google.com with SMTP id q108so5418429qgd.37 for ; Mon, 21 Jul 2014 08:03:38 -0700 (PDT) From: Jeff Layton To: bfields@fieldses.org Cc: linux-nfs@vger.kernel.org, hch@infradead.org Subject: [PATCH 27/40] nfsd: add an operation for unhashing a stateowner Date: Mon, 21 Jul 2014 11:02:39 -0400 Message-Id: <1405954972-28904-28-git-send-email-jlayton@primarydata.com> In-Reply-To: <1405954972-28904-1-git-send-email-jlayton@primarydata.com> References: <1405954972-28904-1-git-send-email-jlayton@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: Allow stateowners to be unhashed and destroyed when the last reference is put. The unhashing must be idempotent. In a future patch, we'll add some locking around it, but for now it's only protected by the client_mutex. Signed-off-by: Jeff Layton --- fs/nfsd/nfs4state.c | 45 +++++++++++++++++++++++++++++++++++---------- fs/nfsd/state.h | 1 + 2 files changed, 36 insertions(+), 10 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index f2e843b471f2..14ae8d5d7312 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -946,9 +946,13 @@ static void __release_lock_stateid(struct nfs4_ol_stateid *stp) static void unhash_lockowner(struct nfs4_lockowner *lo) { + list_del_init(&lo->lo_owner.so_strhash); +} + +static void release_lockowner_stateids(struct nfs4_lockowner *lo) +{ struct nfs4_ol_stateid *stp; - list_del(&lo->lo_owner.so_strhash); while (!list_empty(&lo->lo_owner.so_stateids)) { stp = list_first_entry(&lo->lo_owner.so_stateids, struct nfs4_ol_stateid, st_perstateowner); @@ -959,6 +963,7 @@ static void unhash_lockowner(struct nfs4_lockowner *lo) static void release_lockowner(struct nfs4_lockowner *lo) { unhash_lockowner(lo); + release_lockowner_stateids(lo); nfs4_put_stateowner(&lo->lo_owner); } @@ -1008,15 +1013,8 @@ static void release_open_stateid(struct nfs4_ol_stateid *stp) static void unhash_openowner(struct nfs4_openowner *oo) { - struct nfs4_ol_stateid *stp; - - list_del(&oo->oo_owner.so_strhash); - list_del(&oo->oo_perclient); - while (!list_empty(&oo->oo_owner.so_stateids)) { - stp = list_first_entry(&oo->oo_owner.so_stateids, - struct nfs4_ol_stateid, st_perstateowner); - release_open_stateid(stp); - } + list_del_init(&oo->oo_owner.so_strhash); + list_del_init(&oo->oo_perclient); } static void release_last_closed_stateid(struct nfs4_openowner *oo) @@ -1029,9 +1027,21 @@ static void release_last_closed_stateid(struct nfs4_openowner *oo) } } +static void release_openowner_stateids(struct nfs4_openowner *oo) +{ + struct nfs4_ol_stateid *stp; + + while (!list_empty(&oo->oo_owner.so_stateids)) { + stp = list_first_entry(&oo->oo_owner.so_stateids, + struct nfs4_ol_stateid, st_perstateowner); + release_open_stateid(stp); + } +} + static void release_openowner(struct nfs4_openowner *oo) { unhash_openowner(oo); + release_openowner_stateids(oo); list_del(&oo->oo_close_lru); release_last_closed_stateid(oo); nfs4_put_stateowner(&oo->oo_owner); @@ -2998,6 +3008,7 @@ static void nfs4_put_stateowner(struct nfs4_stateowner *sop) { if (!atomic_dec_and_test(&sop->so_count)) return; + sop->so_unhash(sop); sop->so_free(sop); } @@ -3009,6 +3020,13 @@ static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, u list_add(&oo->oo_perclient, &clp->cl_openowners); } +static void nfs4_unhash_openowner(struct nfs4_stateowner *so) +{ + struct nfs4_openowner *oo = openowner(so); + + unhash_openowner(oo); +} + static void nfs4_free_openowner(struct nfs4_stateowner *so) { struct nfs4_openowner *oo = openowner(so); @@ -3028,6 +3046,7 @@ alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, if (!oo) return NULL; oo->oo_owner.so_free = nfs4_free_openowner; + oo->oo_owner.so_unhash = nfs4_unhash_openowner; oo->oo_owner.so_is_open_owner = 1; oo->oo_owner.so_seqid = open->op_seqid; oo->oo_flags = NFS4_OO_NEW; @@ -4774,6 +4793,11 @@ find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, return NULL; } +static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) +{ + unhash_lockowner(lockowner(sop)); +} + static void nfs4_free_lockowner(struct nfs4_stateowner *sop) { struct nfs4_lockowner *lo = lockowner(sop); @@ -4801,6 +4825,7 @@ alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, str lo->lo_owner.so_is_open_owner = 0; lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; lo->lo_owner.so_free = nfs4_free_lockowner; + lo->lo_owner.so_unhash = nfs4_unhash_lockowner; list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); return lo; } diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index 945f38c0f3a9..f011a76b7196 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -347,6 +347,7 @@ struct nfs4_stateowner { bool so_is_open_owner; void (*so_free)(struct nfs4_stateowner *); + void (*so_unhash)(struct nfs4_stateowner *); }; struct nfs4_openowner { -- 1.9.3