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[50.108.86.94]) by smtp.gmail.com with ESMTPSA id e66sm1194267itd.22.2016.09.22.10.39.37 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 22 Sep 2016 10:39:38 -0700 (PDT) From: Trond Myklebust To: anna.schumaker@netapp.com Cc: linux-nfs@vger.kernel.org, Oleg Drokin Subject: [PATCH v7 08/31] NFSv4.x: Allow callers of nfs_remove_bad_delegation() to specify a stateid Date: Thu, 22 Sep 2016 13:38:58 -0400 Message-Id: <1474565961-21303-9-git-send-email-trond.myklebust@primarydata.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1474565961-21303-8-git-send-email-trond.myklebust@primarydata.com> References: <1474565961-21303-1-git-send-email-trond.myklebust@primarydata.com> <1474565961-21303-2-git-send-email-trond.myklebust@primarydata.com> <1474565961-21303-3-git-send-email-trond.myklebust@primarydata.com> <1474565961-21303-4-git-send-email-trond.myklebust@primarydata.com> <1474565961-21303-5-git-send-email-trond.myklebust@primarydata.com> <1474565961-21303-6-git-send-email-trond.myklebust@primarydata.com> <1474565961-21303-7-git-send-email-trond.myklebust@primarydata.com> <1474565961-21303-8-git-send-email-trond.myklebust@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Allow the callers of nfs_remove_bad_delegation() to specify the stateid that needs to be marked as bad. Signed-off-by: Trond Myklebust --- fs/nfs/delegation.c | 30 +++++++++++++++++++++++------- fs/nfs/delegation.h | 2 +- fs/nfs/flexfilelayout/flexfilelayout.c | 2 +- fs/nfs/nfs4proc.c | 14 ++++++++------ 4 files changed, 33 insertions(+), 15 deletions(-) diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index b9c65421ed81..e5212e5c73d2 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -652,23 +652,39 @@ static void nfs_client_mark_return_unused_delegation_types(struct nfs_client *cl rcu_read_unlock(); } -static void nfs_revoke_delegation(struct inode *inode) +static void nfs_mark_delegation_revoked(struct nfs_server *server, + struct nfs_delegation *delegation) +{ + set_bit(NFS_DELEGATION_REVOKED, &delegation->flags); + nfs_mark_return_delegation(server, delegation); +} + +static bool nfs_revoke_delegation(struct inode *inode, + const nfs4_stateid *stateid) { struct nfs_delegation *delegation; + bool ret = false; + rcu_read_lock(); delegation = rcu_dereference(NFS_I(inode)->delegation); - if (delegation != NULL) { - set_bit(NFS_DELEGATION_REVOKED, &delegation->flags); - nfs_mark_return_delegation(NFS_SERVER(inode), delegation); - } + if (delegation == NULL) + goto out; + if (stateid && !nfs4_stateid_match(stateid, &delegation->stateid)) + goto out; + nfs_mark_delegation_revoked(NFS_SERVER(inode), delegation); + ret = true; +out: rcu_read_unlock(); + return ret; } -void nfs_remove_bad_delegation(struct inode *inode) +void nfs_remove_bad_delegation(struct inode *inode, + const nfs4_stateid *stateid) { struct nfs_delegation *delegation; - nfs_revoke_delegation(inode); + if (!nfs_revoke_delegation(inode, stateid)) + return; delegation = nfs_inode_detach_delegation(inode); if (delegation) { nfs_inode_find_state_and_recover(inode, &delegation->stateid); diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h index 64724d252a79..d40827af5913 100644 --- a/fs/nfs/delegation.h +++ b/fs/nfs/delegation.h @@ -47,7 +47,7 @@ void nfs_expire_unused_delegation_types(struct nfs_client *clp, fmode_t flags); void nfs_expire_unreferenced_delegations(struct nfs_client *clp); int nfs_client_return_marked_delegations(struct nfs_client *clp); int nfs_delegations_present(struct nfs_client *clp); -void nfs_remove_bad_delegation(struct inode *inode); +void nfs_remove_bad_delegation(struct inode *inode, const nfs4_stateid *stateid); void nfs_delegation_mark_reclaim(struct nfs_client *clp); void nfs_delegation_reap_unclaimed(struct nfs_client *clp); diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c index 51b51369704c..98ace127bf86 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.c +++ b/fs/nfs/flexfilelayout/flexfilelayout.c @@ -1080,7 +1080,7 @@ static int ff_layout_async_handle_error_v4(struct rpc_task *task, case -NFS4ERR_BAD_STATEID: if (state == NULL) break; - nfs_remove_bad_delegation(state->inode); + nfs_remove_bad_delegation(state->inode, NULL); case -NFS4ERR_OPENMODE: if (state == NULL) break; diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 0ade81441ac2..9c203c221876 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -2385,9 +2385,10 @@ static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *sta return ret; } -static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state) +static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, + const nfs4_stateid *stateid) { - nfs_remove_bad_delegation(state->inode); + nfs_remove_bad_delegation(state->inode, stateid); write_seqlock(&state->seqlock); nfs4_stateid_copy(&state->stateid, &state->open_stateid); write_sequnlock(&state->seqlock); @@ -2397,7 +2398,7 @@ static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state) static void nfs40_clear_delegation_stateid(struct nfs4_state *state) { if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) - nfs_finish_clear_delegation_stateid(state); + nfs_finish_clear_delegation_stateid(state, NULL); } static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) @@ -2443,19 +2444,20 @@ static void nfs41_check_delegation_stateid(struct nfs4_state *state) rcu_read_unlock(); return; } + + nfs4_stateid_copy(&stateid, &delegation->stateid); if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) { rcu_read_unlock(); - nfs_finish_clear_delegation_stateid(state); + nfs_finish_clear_delegation_stateid(state, &stateid); return; } - nfs4_stateid_copy(&stateid, &delegation->stateid); cred = get_rpccred(delegation->cred); rcu_read_unlock(); status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); trace_nfs4_test_delegation_stateid(state, NULL, status); if (status != NFS_OK) - nfs_finish_clear_delegation_stateid(state); + nfs_finish_clear_delegation_stateid(state, &stateid); put_rpccred(cred); }