Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-qc0-f172.google.com ([209.85.216.172]:45370 "EHLO mail-qc0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755184AbaGUPDD (ORCPT ); Mon, 21 Jul 2014 11:03:03 -0400 Received: by mail-qc0-f172.google.com with SMTP id l6so5767513qcy.3 for ; Mon, 21 Jul 2014 08:03:02 -0700 (PDT) From: Jeff Layton To: bfields@fieldses.org Cc: linux-nfs@vger.kernel.org, hch@infradead.org, Trond Myklebust Subject: [PATCH 02/40] nfsd: Add reference counting to the lock and open stateids Date: Mon, 21 Jul 2014 11:02:14 -0400 Message-Id: <1405954972-28904-3-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: From: Trond Myklebust When we remove the client_mutex, we'll need to be able to ensure that these objects aren't destroyed while we're not holding locks. Signed-off-by: Trond Myklebust --- fs/nfsd/nfs4state.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 3e55df0d7504..76d28be3ef41 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -883,8 +883,10 @@ static void close_generic_stateid(struct nfs4_ol_stateid *stp) release_all_access(stp); } -static void free_generic_stateid(struct nfs4_ol_stateid *stp) +static void put_generic_stateid(struct nfs4_ol_stateid *stp) { + if (!atomic_dec_and_test(&stp->st_stid.sc_count)) + return; if (stp->st_file) put_nfs4_file(stp->st_file); remove_stid(&stp->st_stid); @@ -902,7 +904,7 @@ static void __release_lock_stateid(struct nfs4_ol_stateid *stp) if (file) filp_close(file, (fl_owner_t)lockowner(stp->st_stateowner)); close_generic_stateid(stp); - free_generic_stateid(stp); + put_generic_stateid(stp); } static void unhash_lockowner(struct nfs4_lockowner *lo) @@ -965,7 +967,7 @@ static void unhash_open_stateid(struct nfs4_ol_stateid *stp) static void release_open_stateid(struct nfs4_ol_stateid *stp) { unhash_open_stateid(stp); - free_generic_stateid(stp); + put_generic_stateid(stp); } static void unhash_openowner(struct nfs4_openowner *oo) @@ -986,7 +988,7 @@ static void release_last_closed_stateid(struct nfs4_openowner *oo) struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; if (s) { - free_generic_stateid(s); + put_generic_stateid(s); oo->oo_last_closed_stid = NULL; } } @@ -3823,7 +3825,7 @@ void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) if (open->op_file) nfsd4_free_file(open->op_file); if (open->op_stp) - free_generic_stateid(open->op_stp); + put_generic_stateid(open->op_stp); } __be32 @@ -4482,9 +4484,9 @@ static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) unhash_open_stateid(s); if (clp->cl_minorversion) { - free_generic_stateid(s); if (list_empty(&oo->oo_owner.so_stateids)) release_openowner(oo); + put_generic_stateid(s); } else { if (s->st_file) { put_nfs4_file(s->st_file); -- 1.9.3