From patchwork Thu Oct 13 04:26:47 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: NeilBrown X-Patchwork-Id: 9374267 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 281F660865 for ; Thu, 13 Oct 2016 04:29:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1E64229686 for ; Thu, 13 Oct 2016 04:29:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 12DDE29761; Thu, 13 Oct 2016 04:29:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 69FC82975C for ; Thu, 13 Oct 2016 04:29:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754687AbcJME3L (ORCPT ); Thu, 13 Oct 2016 00:29:11 -0400 Received: from mx2.suse.de ([195.135.220.15]:58143 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754830AbcJME3J (ORCPT ); Thu, 13 Oct 2016 00:29:09 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id E9B0FACF7; Thu, 13 Oct 2016 04:28:02 +0000 (UTC) From: NeilBrown To: Trond Myklebust , Anna Schumaker , Jeff Layton Date: Thu, 13 Oct 2016 15:26:47 +1100 Subject: [PATCH 4/6] NFSv4: change nfs4_select_rw_stateid to take a lock_context inplace of lock_owner Cc: Benjamin Coddington , Linux NFS Mailing List Message-ID: <147633280750.766.16214787133000729977.stgit@noble> In-Reply-To: <147633263771.766.17853370901003798934.stgit@noble> References: <147633263771.766.17853370901003798934.stgit@noble> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 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 The only time that a lock_context is not immediately available is in setattr, and now that it has an open_context, it can easily find one with nfs_get_lock_context. This removes the need for the on-stack nfs_lockowner. This change is preparation for correctly support flock stateids. Signed-off-by: NeilBrown --- fs/nfs/nfs4_fs.h | 2 +- fs/nfs/nfs4proc.c | 15 ++++++--------- fs/nfs/nfs4state.c | 11 +++++------ 3 files changed, 12 insertions(+), 16 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index 9b3a82abab07..7784b79915e1 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -457,7 +457,7 @@ extern void nfs41_handle_server_scope(struct nfs_client *, extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp); extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl); extern int nfs4_select_rw_stateid(struct nfs4_state *, fmode_t, - const struct nfs_lockowner *, nfs4_stateid *, + const struct nfs_lock_context *, nfs4_stateid *, struct rpc_cred **); extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask); diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 950b25413bb4..3c2f11189794 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -2926,12 +2926,13 @@ static int _nfs4_do_setattr(struct inode *inode, if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) { /* Use that stateid */ } else if (truncate && ctx != NULL) { - struct nfs_lockowner lockowner = { - .l_owner = current->files, - }; + struct nfs_lock_context *l_ctx; if (!nfs4_valid_open_stateid(ctx->state)) return -EBADF; - if (nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, &lockowner, + l_ctx = nfs_get_lock_context(ctx); + if (IS_ERR(l_ctx)) + return PTR_ERR(l_ctx); + if (nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, &arg->stateid, &delegation_cred) == -EIO) return -EBADF; } else @@ -4525,11 +4526,7 @@ int nfs4_set_rw_stateid(nfs4_stateid *stateid, const struct nfs_lock_context *l_ctx, fmode_t fmode) { - const struct nfs_lockowner *lockowner = NULL; - - if (l_ctx != NULL) - lockowner = &l_ctx->lockowner; - return nfs4_select_rw_stateid(ctx->state, fmode, lockowner, stateid, NULL); + return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); } EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 5f4281ec5f72..f25eee8202bf 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -939,20 +939,19 @@ int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) static int nfs4_copy_lock_stateid(nfs4_stateid *dst, struct nfs4_state *state, - const struct nfs_lockowner *lockowner) + const struct nfs_lock_context *l_ctx) { struct nfs4_lock_state *lsp; fl_owner_t fl_owner; int ret = -ENOENT; - - if (lockowner == NULL) + if (l_ctx == NULL) goto out; if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) goto out; - fl_owner = lockowner->l_owner; + fl_owner = l_ctx->lockowner.l_owner; spin_lock(&state->state_lock); lsp = __nfs4_find_lock_state(state, fl_owner); if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) @@ -986,7 +985,7 @@ static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) * requests. */ int nfs4_select_rw_stateid(struct nfs4_state *state, - fmode_t fmode, const struct nfs_lockowner *lockowner, + fmode_t fmode, const struct nfs_lock_context *l_ctx, nfs4_stateid *dst, struct rpc_cred **cred) { int ret; @@ -995,7 +994,7 @@ int nfs4_select_rw_stateid(struct nfs4_state *state, return -EIO; if (cred != NULL) *cred = NULL; - ret = nfs4_copy_lock_stateid(dst, state, lockowner); + ret = nfs4_copy_lock_stateid(dst, state, l_ctx); if (ret == -EIO) /* A lost lock - don't even consider delegations */ goto out;