Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-qc0-f174.google.com ([209.85.216.174]:51630 "EHLO mail-qc0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755268AbaGHSFF (ORCPT ); Tue, 8 Jul 2014 14:05:05 -0400 Received: by mail-qc0-f174.google.com with SMTP id x13so5547410qcv.33 for ; Tue, 08 Jul 2014 11:05:05 -0700 (PDT) From: Jeff Layton To: bfields@fieldses.org Cc: linux-nfs@vger.kernel.org Subject: [PATCH v4 022/100] nfsd: Simplify stateid management Date: Tue, 8 Jul 2014 14:03:10 -0400 Message-Id: <1404842668-22521-23-git-send-email-jlayton@primarydata.com> In-Reply-To: <1404842668-22521-1-git-send-email-jlayton@primarydata.com> References: <1404842668-22521-1-git-send-email-jlayton@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: From: Trond Myklebust Don't allow stateids to clear the open file pointer until they are being destroyed. Also, move to kzalloc and get rid of explicit zeroing of fields. Signed-off-by: Trond Myklebust --- fs/nfsd/nfs4state.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index a1ddb1e6805c..7948d8cd75e0 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -479,7 +479,7 @@ kmem_cache *slab) struct nfs4_stid *stid; int new_id; - stid = kmem_cache_alloc(slab, GFP_KERNEL); + stid = kmem_cache_zalloc(slab, GFP_KERNEL); if (!stid) return NULL; @@ -491,11 +491,9 @@ kmem_cache *slab) if (new_id < 0) goto out_free; stid->sc_client = cl; - stid->sc_type = 0; stid->sc_stateid.si_opaque.so_id = new_id; stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; /* Will be incremented before return to client: */ - stid->sc_stateid.si_generation = 0; atomic_set(&stid->sc_count, 1); /* @@ -616,10 +614,8 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct sv INIT_LIST_HEAD(&dp->dl_perfile); INIT_LIST_HEAD(&dp->dl_perclnt); INIT_LIST_HEAD(&dp->dl_recall_lru); - dp->dl_file = NULL; dp->dl_type = NFS4_OPEN_DELEGATE_READ; fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); - dp->dl_time = 0; return dp; } @@ -642,6 +638,8 @@ void nfs4_put_delegation(struct nfs4_delegation *dp) { if (atomic_dec_and_test(&dp->dl_stid.sc_count)) { + if (dp->dl_file) + put_nfs4_file(dp->dl_file); nfs4_free_stid(deleg_slab, &dp->dl_stid); num_delegations--; } @@ -690,12 +688,9 @@ unhash_delegation(struct nfs4_delegation *dp) list_del_init(&dp->dl_recall_lru); list_del_init(&dp->dl_perfile); spin_unlock(&fp->fi_lock); - if (fp) { + if (fp) nfs4_put_deleg_lease(fp); - dp->dl_file = NULL; - } spin_unlock(&state_lock); - put_nfs4_file(fp); } static void destroy_revoked_delegation(struct nfs4_delegation *dp) @@ -889,12 +884,12 @@ static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) static void close_generic_stateid(struct nfs4_ol_stateid *stp) { release_all_access(stp); - put_nfs4_file(stp->st_file); - stp->st_file = NULL; } static void free_generic_stateid(struct nfs4_ol_stateid *stp) { + if (stp->st_file) + put_nfs4_file(stp->st_file); nfs4_free_stid(stateid_slab, &stp->st_stid); } @@ -4456,6 +4451,10 @@ static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) if (list_empty(&oo->oo_owner.so_stateids)) release_openowner(oo); } else { + if (s->st_file) { + put_nfs4_file(s->st_file); + s->st_file = NULL; + } oo->oo_last_closed_stid = s; /* * In the 4.0 case we need to keep the owners around a -- 1.9.3