From patchwork Mon Jun 30 15:49:04 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 4451421 Return-Path: X-Original-To: patchwork-linux-nfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 96342BEECB for ; Mon, 30 Jun 2014 15:51:26 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9F9FD201C0 for ; Mon, 30 Jun 2014 15:51:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A8C072021A for ; Mon, 30 Jun 2014 15:51:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754671AbaF3PvX (ORCPT ); Mon, 30 Jun 2014 11:51:23 -0400 Received: from mail-qg0-f51.google.com ([209.85.192.51]:33046 "EHLO mail-qg0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750897AbaF3PvW (ORCPT ); Mon, 30 Jun 2014 11:51:22 -0400 Received: by mail-qg0-f51.google.com with SMTP id z60so2154670qgd.38 for ; Mon, 30 Jun 2014 08:51:22 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references; bh=rdBB5/heH5vPfLQx5IKgYuXmVk0dQhRSWAB+v76I8BI=; b=L5PJa8rlOSPJx2axo4rBF+byPV9rL3w80hNk184srO4kLLozfaz1PIEw0NnDSck0Z3 I4z1+8eP2xcj1b2xPyAv6bu+c0RgF9j7byGzNAHKiWXMzioVxesIN0fGrY8LyMuhY9rH VFmC1ixRXqSw67InwN4ymyRdy7j4/x2pekmFrUjWn4sNyAIi12IAjzAYtXKG1pkFMhFH i6gJ2b48b/3cZRzz7lud58ov3Oy37ZrNUESPrMgWYkIN6Xl0IDJB9mCfgZ+juYXImO/z DoyzjE2TX3uQE4y0f7B056bAcL/nJW7daxd4QPzyqb4wHWplGxuAiUKp4N1k/8gh58NY iMug== X-Gm-Message-State: ALoCoQmhYXWpAvbrcvOjU/2cIU8aIN2OWC0+yPTb75dcqATsdREpA3iTtEej0z9+Bb1W8HuZ/GkG X-Received: by 10.140.49.194 with SMTP id q60mr49912891qga.7.1404143482143; Mon, 30 Jun 2014 08:51:22 -0700 (PDT) Received: from tlielax.poochiereds.net ([2001:470:8:d63:3a60:77ff:fe93:a95d]) by mx.google.com with ESMTPSA id m1sm32584105qaz.27.2014.06.30.08.51.20 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 30 Jun 2014 08:51:20 -0700 (PDT) From: Jeff Layton To: bfields@fieldses.org Cc: linux-nfs@vger.kernel.org, Trond Myklebust Subject: [PATCH v3 035/114] nfsd: Fix delegation revocation Date: Mon, 30 Jun 2014 11:49:04 -0400 Message-Id: <1404143423-24381-36-git-send-email-jlayton@primarydata.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1404143423-24381-1-git-send-email-jlayton@primarydata.com> References: <1404143423-24381-1-git-send-email-jlayton@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Trond Myklebust Ensure that the delegations cannot be found by the laundromat etc once we add them to the various 'revoke' lists. Signed-off-by: Trond Myklebust --- fs/nfsd/nfs4state.c | 56 +++++++++++++++++++++++++++++++++-------------------- 1 file changed, 35 insertions(+), 21 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index fdbd209b02a6..befeb322cb92 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -640,13 +640,13 @@ hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); } -/* Called under the state lock. */ static void -unhash_delegation(struct nfs4_delegation *dp) +unhash_delegation_locked(struct nfs4_delegation *dp) { struct nfs4_file *fp = dp->dl_file; - spin_lock(&state_lock); + lockdep_assert_held(&state_lock); + spin_lock(&fp->fi_lock); list_del_init(&dp->dl_perclnt); list_del_init(&dp->dl_recall_lru); @@ -654,23 +654,32 @@ unhash_delegation(struct nfs4_delegation *dp) spin_unlock(&fp->fi_lock); if (fp) nfs4_put_deleg_lease(fp); - spin_unlock(&state_lock); } +static void +unhash_delegation(struct nfs4_delegation *dp) +{ + spin_lock(&state_lock); + unhash_delegation_locked(dp); + spin_unlock(&state_lock); +} - -static void destroy_revoked_delegation(struct nfs4_delegation *dp) +static void destroy_delegation(struct nfs4_delegation *dp) { - list_del_init(&dp->dl_recall_lru); remove_stid(&dp->dl_stid); nfs4_put_delegation(dp); } -static void destroy_delegation(struct nfs4_delegation *dp) +static void unhash_and_destroy_delegation(struct nfs4_delegation *dp) { unhash_delegation(dp); - remove_stid(&dp->dl_stid); - nfs4_put_delegation(dp); + destroy_delegation(dp); +} + +static void destroy_revoked_delegation(struct nfs4_delegation *dp) +{ + list_del_init(&dp->dl_recall_lru); + destroy_delegation(dp); } static void revoke_delegation(struct nfs4_delegation *dp) @@ -678,11 +687,10 @@ static void revoke_delegation(struct nfs4_delegation *dp) struct nfs4_client *clp = dp->dl_stid.sc_client; if (clp->cl_minorversion == 0) - destroy_delegation(dp); + destroy_revoked_delegation(dp); else { - unhash_delegation(dp); dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; - list_add(&dp->dl_recall_lru, &clp->cl_revoked); + list_move(&dp->dl_recall_lru, &clp->cl_revoked); } } @@ -1416,12 +1424,13 @@ destroy_client(struct nfs4_client *clp) spin_lock(&state_lock); while (!list_empty(&clp->cl_delegations)) { dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); - list_del_init(&dp->dl_perclnt); - list_move(&dp->dl_recall_lru, &reaplist); + unhash_delegation_locked(dp); + list_add(&dp->dl_recall_lru, &reaplist); } spin_unlock(&state_lock); while (!list_empty(&reaplist)) { dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); + list_del_init(&dp->dl_recall_lru); destroy_delegation(dp); } list_splice_init(&clp->cl_revoked, &reaplist); @@ -3604,7 +3613,7 @@ nfs4_open_delegation(struct net *net, struct svc_fh *fh, open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; return; out_free: - destroy_delegation(dp); + unhash_and_destroy_delegation(dp); out_no_deleg: open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && @@ -3843,7 +3852,8 @@ nfs4_laundromat(struct nfsd_net *nn) new_timeo = min(new_timeo, t); break; } - list_move(&dp->dl_recall_lru, &reaplist); + unhash_delegation_locked(dp); + list_add(&dp->dl_recall_lru, &reaplist); } spin_unlock(&state_lock); list_for_each_safe(pos, next, &reaplist) { @@ -4469,7 +4479,7 @@ nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, if (status) goto out; - destroy_delegation(dp); + unhash_and_destroy_delegation(dp); out: nfs4_unlock_state(); @@ -5293,8 +5303,10 @@ static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, lockdep_assert_held(&state_lock); list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { - if (victims) - list_move(&dp->dl_recall_lru, victims); + if (victims) { + unhash_delegation_locked(dp); + list_add(&dp->dl_recall_lru, victims); + } if (++count == max) break; } @@ -5543,11 +5555,13 @@ nfs4_state_shutdown_net(struct net *net) spin_lock(&state_lock); list_for_each_safe(pos, next, &nn->del_recall_lru) { dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); - list_move(&dp->dl_recall_lru, &reaplist); + unhash_delegation_locked(dp); + list_add(&dp->dl_recall_lru, &reaplist); } spin_unlock(&state_lock); list_for_each_safe(pos, next, &reaplist) { dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); + list_del_init(&dp->dl_recall_lru); destroy_delegation(dp); }