Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-qc0-f171.google.com ([209.85.216.171]:60193 "EHLO mail-qc0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752825AbaIDMjM (ORCPT ); Thu, 4 Sep 2014 08:39:12 -0400 Received: by mail-qc0-f171.google.com with SMTP id x3so10152490qcv.2 for ; Thu, 04 Sep 2014 05:39:12 -0700 (PDT) From: Jeff Layton To: linux-fsdevel@vger.kernel.org Cc: linux-nfs@vger.kernel.org, Christoph Hellwig , "J. Bruce Fields" , linux-kernel@vger.kernel.org Subject: [PATCH v2 10/17] locks: move i_lock acquisition into generic_*_lease handlers Date: Thu, 4 Sep 2014 08:38:36 -0400 Message-Id: <1409834323-7171-11-git-send-email-jlayton@primarydata.com> In-Reply-To: <1409834323-7171-1-git-send-email-jlayton@primarydata.com> References: <1409834323-7171-1-git-send-email-jlayton@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: Now that we have a saner internal API for managing leases, we no longer need to mandate that the inode->i_lock be held over most of the lease code. Push it down into generic_add_lease and generic_delete_lease. Signed-off-by: Jeff Layton Reviewed-by: Christoph Hellwig --- fs/locks.c | 21 +++++++++------------ 1 file changed, 9 insertions(+), 12 deletions(-) diff --git a/fs/locks.c b/fs/locks.c index a5ed4a1f73ca..5bc61091263f 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -1330,6 +1330,8 @@ static void time_out_leases(struct inode *inode) struct file_lock **before; struct file_lock *fl; + lockdep_assert_held(&inode->i_lock); + before = &inode->i_flock; while ((fl = *before) && IS_LEASE(fl) && lease_breaking(fl)) { trace_time_out_leases(inode, fl); @@ -1590,6 +1592,8 @@ generic_add_lease(struct file *filp, long arg, struct file_lock **flp, void **pr return -EINVAL; } + spin_lock(&inode->i_lock); + time_out_leases(inode); error = check_conflicting_open(dentry, arg); if (error) goto out; @@ -1655,6 +1659,7 @@ out_setup: if (lease->fl_lmops->lm_setup) lease->fl_lmops->lm_setup(lease, priv); out: + spin_unlock(&inode->i_lock); if (is_deleg) mutex_unlock(&inode->i_mutex); if (!error && !my_before) @@ -1672,6 +1677,7 @@ static int generic_delete_lease(struct file *filp) struct dentry *dentry = filp->f_path.dentry; struct inode *inode = dentry->d_inode; + spin_lock(&inode->i_lock); for (before = &inode->i_flock; ((fl = *before) != NULL) && IS_LEASE(fl); before = &fl->fl_next) { @@ -1681,6 +1687,7 @@ static int generic_delete_lease(struct file *filp) trace_generic_delete_lease(inode, fl); if (fl) error = fl->fl_lmops->lm_change(before, F_UNLCK); + spin_unlock(&inode->i_lock); return error; } @@ -1694,8 +1701,6 @@ static int generic_delete_lease(struct file *filp) * * The (input) flp->fl_lmops->lm_break function is required * by break_lease(). - * - * Called with inode->i_lock held. */ int generic_setlease(struct file *filp, long arg, struct file_lock **flp, void **priv) @@ -1712,8 +1717,6 @@ int generic_setlease(struct file *filp, long arg, struct file_lock **flp, if (error) return error; - time_out_leases(inode); - switch (arg) { case F_UNLCK: return generic_delete_lease(filp); @@ -1750,16 +1753,10 @@ EXPORT_SYMBOL(generic_setlease); int vfs_setlease(struct file *filp, long arg, struct file_lock **lease, void **priv) { - struct inode *inode = file_inode(filp); - int error; - - spin_lock(&inode->i_lock); if (filp->f_op->setlease) - error = filp->f_op->setlease(filp, arg, lease, priv); + return filp->f_op->setlease(filp, arg, lease, priv); else - error = generic_setlease(filp, arg, lease, priv); - spin_unlock(&inode->i_lock); - return error; + return generic_setlease(filp, arg, lease, priv); } EXPORT_SYMBOL_GPL(vfs_setlease); -- 1.9.3