From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com ([209.132.183.28]:47368 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933689AbcIFPMl (ORCPT ); Tue, 6 Sep 2016 11:12:41 -0400 From: Jeff Layton To: trond.myklebust@primarydata.com Cc: linux-nfs@vger.kernel.org Subject: [PATCH 0/9] nfs: add CB_NOTIFY_LOCK support to nfs client Date: Tue, 6 Sep 2016 11:12:31 -0400 Message-Id: <1473174760-29859-1-git-send-email-jlayton@redhat.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: This patchset adds support for CB_NOTIFY_LOCK callbacks to the NFS client. The basic idea is to add a waitqueue to the nfs_client and then have blocking lock waiters wait on that queue for callbacks. When a callback comes in, we use a keyed wakeup to wake any waiters. The waitqueue handling is necessarily more "manual" than I would like, but I don't see a real alternative there given that we need to insert the waiters onto the waitqueue prior to sending the lock request, and sending a lock request can involve blocking operations. Tested in conjunction with the corresponding knfsd server-side patchset. Jeff Layton (9): nfs: the length argument to read_buf should be unsigned nfs: eliminate pointless and confusing do_vfs_lock wrappers nfs: check for POSIX lock capability on server even for flock locks nfs: add a freezable_schedule_timeout_unsafe() and use it when waiting to retry LOCK nfs: add handling for CB_NOTIFY_LOCK in client nfs: move nfs4_set_lock_state call into caller nfs: add code to allow client to wait on lock callbacks nfs: ensure that the filehandle in CB_NOTIFY_LOCK request matches the inode nfs: track whether server sets MAY_NOTIFY_LOCK flag fs/nfs/callback.h | 8 ++++ fs/nfs/callback_proc.c | 20 ++++++++ fs/nfs/callback_xdr.c | 51 +++++++++++++++++++- fs/nfs/file.c | 9 +--- fs/nfs/nfs4_fs.h | 1 + fs/nfs/nfs4client.c | 1 + fs/nfs/nfs4proc.c | 118 +++++++++++++++++++++++++++++++++++++--------- include/linux/freezer.h | 13 +++++ include/linux/nfs_fs_sb.h | 1 + 9 files changed, 190 insertions(+), 32 deletions(-) -- 2.7.4