From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Wed, 25 Mar 2015 20:40:07 +0000 (-0400)
Subject: NFS: Block new writes while syncing data in nfs_getattr()
X-Git-Tag: Ubuntu-snapdragon-4.4.0-1050.54~8257^2~17
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=8c18d76bcba874e872410ca63c7e59b10aafa17d;p=mirror_ubuntu-artful-kernel.git

NFS: Block new writes while syncing data in nfs_getattr()

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index f1fc0e4c1c02..0c3be2658546 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -649,7 +649,9 @@ int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
 	trace_nfs_getattr_enter(inode);
 	/* Flush out writes to the server in order to update c/mtime.  */
 	if (S_ISREG(inode->i_mode)) {
+		mutex_lock(&inode->i_mutex);
 		err = nfs_sync_inode(inode);
+		mutex_unlock(&inode->i_mutex);
 		if (err)
 			goto out;
 	}