From 27ac0ffeac80ba6b9580529568d06144df044366 Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Tue, 20 Sep 2011 17:19:26 -0400 Subject: locks: break delegations on any attribute modification NFSv4 uses leases to guarantee that clients can cache metadata as well as data. Cc: Mikulas Patocka Cc: David Howells Cc: Tyler Hicks Cc: Dustin Kirkland Acked-by: Jeff Layton Signed-off-by: J. Bruce Fields Signed-off-by: Al Viro --- fs/nfsd/vfs.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 27ba21b5f383..94b5f5d2bfed 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -427,7 +427,7 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap, goto out_nfserr; fh_lock(fhp); - host_err = notify_change(dentry, iap); + host_err = notify_change(dentry, iap, NULL); err = nfserrno(host_err); fh_unlock(fhp); } @@ -988,7 +988,11 @@ static void kill_suid(struct dentry *dentry) ia.ia_valid = ATTR_KILL_SUID | ATTR_KILL_SGID | ATTR_KILL_PRIV; mutex_lock(&dentry->d_inode->i_mutex); - notify_change(dentry, &ia); + /* + * Note we call this on write, so notify_change will not + * encounter any conflicting delegations: + */ + notify_change(dentry, &ia, NULL); mutex_unlock(&dentry->d_inode->i_mutex); } -- cgit v1.2.1