From patchwork Tue Oct 23 22:43:54 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: NeilBrown X-Patchwork-Id: 10653869 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 086A114BD for ; Tue, 23 Oct 2018 22:46:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E308B29FA5 for ; Tue, 23 Oct 2018 22:46:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D471C29FBD; Tue, 23 Oct 2018 22:46:35 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, 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 5142729FA5 for ; Tue, 23 Oct 2018 22:46:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729245AbeJXHLz (ORCPT ); Wed, 24 Oct 2018 03:11:55 -0400 Received: from mx2.suse.de ([195.135.220.15]:36452 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725787AbeJXHLz (ORCPT ); Wed, 24 Oct 2018 03:11:55 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 0F73AAF84; Tue, 23 Oct 2018 22:46:28 +0000 (UTC) From: NeilBrown To: Jeff Layton , Alexander Viro Date: Wed, 24 Oct 2018 09:43:54 +1100 Subject: [PATCH 8/9] locks: merge posix_unblock_lock() and locks_delete_block() Cc: "J. Bruce Fields" , Martin Wilck , linux-fsdevel@vger.kernel.org, Frank Filz , linux-kernel@vger.kernel.org Message-ID: <154033463464.29542.5879842794139424184.stgit@noble> In-Reply-To: <154033435272.29542.13985568983074440924.stgit@noble> References: <154033435272.29542.13985568983074440924.stgit@noble> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP posix_unblock_lock() is not specific to posix locks, and behaves nearly identically to locks_delete_block() - the former returning a status while the later doesn't. So discard posix_unblock_lock() and use locks_delete_block() instead, after giving that function an appropriate return value. Signed-off-by: NeilBrown --- fs/cifs/file.c | 2 +- fs/lockd/svclock.c | 2 +- fs/locks.c | 35 ++++++++++++----------------------- fs/nfsd/nfs4state.c | 6 +++--- include/linux/fs.h | 4 ++-- 5 files changed, 19 insertions(+), 30 deletions(-) diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 066ed2e4ba96..3dcee59d16bc 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -1095,7 +1095,7 @@ cifs_posix_lock_set(struct file *file, struct file_lock *flock) rc = wait_event_interruptible(flock->fl_wait, !flock->fl_blocker); if (!rc) goto try_again; - posix_unblock_lock(flock); + locks_delete_block(flock); } return rc; } diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c index 74330daeab71..ea719cdd6a36 100644 --- a/fs/lockd/svclock.c +++ b/fs/lockd/svclock.c @@ -276,7 +276,7 @@ static int nlmsvc_unlink_block(struct nlm_block *block) dprintk("lockd: unlinking block %p...\n", block); /* Remove block from list */ - status = posix_unblock_lock(&block->b_call->a_args.lock.fl); + status = locks_delete_block(&block->b_call->a_args.lock.fl); nlmsvc_remove_block(block); return status; } diff --git a/fs/locks.c b/fs/locks.c index 06e9ae1cc0c4..6ecbeaaed33e 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -698,13 +698,24 @@ static void __locks_wake_up_blocks(struct file_lock *blocker) } } -static void locks_delete_block(struct file_lock *waiter) +/** + * locks_delete_lock - stop waiting for a file lock + * @waiter: the lock which was waiting + * + * lockd/nfsd need to disconnect the lock while working on it. + */ +int locks_delete_block(struct file_lock *waiter) { + int status = -ENOENT; + spin_lock(&blocked_lock_lock); + if (waiter->fl_blocker) + status = 0; __locks_wake_up_blocks(waiter); __locks_delete_block(waiter); spin_unlock(&blocked_lock_lock); } +EXPORT_SYMBOL(locks_delete_block); /* Insert waiter into blocker's block list. * We use a circular list so that processes can be easily woken up in @@ -2613,28 +2624,6 @@ void locks_remove_file(struct file *filp) spin_unlock(&ctx->flc_lock); } -/** - * posix_unblock_lock - stop waiting for a file lock - * @waiter: the lock which was waiting - * - * lockd needs to block waiting for locks. - */ -int -posix_unblock_lock(struct file_lock *waiter) -{ - int status = -ENOENT; - - spin_lock(&blocked_lock_lock); - if (waiter->fl_blocker) { - __locks_wake_up_blocks(waiter); - __locks_delete_block(waiter); - status = 0; - } - spin_unlock(&blocked_lock_lock); - return status; -} -EXPORT_SYMBOL(posix_unblock_lock); - /** * vfs_cancel_lock - file byte range unblock lock * @filp: The file to apply the unblock to diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index b0ca0efd2875..5175df0b6646 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -238,7 +238,7 @@ find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh, } spin_unlock(&nn->blocked_locks_lock); if (found) - posix_unblock_lock(&found->nbl_lock); + locks_delete_block(&found->nbl_lock); return found; } @@ -293,7 +293,7 @@ remove_blocked_locks(struct nfs4_lockowner *lo) nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock, nbl_lru); list_del_init(&nbl->nbl_lru); - posix_unblock_lock(&nbl->nbl_lock); + locks_delete_block(&nbl->nbl_lock); free_blocked_lock(nbl); } } @@ -4830,7 +4830,7 @@ nfs4_laundromat(struct nfsd_net *nn) nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock, nbl_lru); list_del_init(&nbl->nbl_lru); - posix_unblock_lock(&nbl->nbl_lock); + locks_delete_block(&nbl->nbl_lock); free_blocked_lock(nbl); } out: diff --git a/include/linux/fs.h b/include/linux/fs.h index 90c4331a0b2c..db02050af0e7 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1103,7 +1103,7 @@ extern void locks_remove_file(struct file *); extern void locks_release_private(struct file_lock *); extern void posix_test_lock(struct file *, struct file_lock *); extern int posix_lock_file(struct file *, struct file_lock *, struct file_lock *); -extern int posix_unblock_lock(struct file_lock *); +extern int locks_delete_block(struct file_lock *); extern int vfs_test_lock(struct file *, struct file_lock *); extern int vfs_lock_file(struct file *, unsigned int, struct file_lock *, struct file_lock *); extern int vfs_cancel_lock(struct file *filp, struct file_lock *fl); @@ -1193,7 +1193,7 @@ static inline int posix_lock_file(struct file *filp, struct file_lock *fl, return -ENOLCK; } -static inline int posix_unblock_lock(struct file_lock *waiter) +static inline int locks_delete_block(struct file_lock *waiter) { return -ENOENT; }