From eda72afb9ef9f45941fb09260c0f268ff81ec40d Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Tue, 5 Jun 2012 15:10:21 +0200 Subject: [PATCH] nfs: don't use intents for checking atomic open is_atomic_open() is now only used by nfs4_lookup_revalidate() to check whether it's okay to skip normal revalidation. It does a racy check for mount read-onlyness and falls back to normal revalidation if the open would fail. This makes little sense now that this function isn't used for determining whether to actually open the file or not. The d_mountpoint() check still makes sense since it is an indication that we might be following a mount and so open may not revalidate the dentry. Signed-off-by: Miklos Szeredi CC: Trond Myklebust Signed-off-by: Al Viro --- fs/nfs/dir.c | 24 ++++-------------------- 1 file changed, 4 insertions(+), 20 deletions(-) diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 0432f474771b..e6d55dc93ffd 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -1366,24 +1366,6 @@ const struct dentry_operations nfs4_dentry_operations = { .d_release = nfs_d_release, }; -/* - * Use intent information to determine whether we need to substitute - * the NFSv4-style stateful OPEN for the LOOKUP call - */ -static int is_atomic_open(struct nameidata *nd) -{ - if (nd == NULL || nfs_lookup_check_intent(nd, LOOKUP_OPEN) == 0) - return 0; - /* NFS does not (yet) have a stateful open for directories */ - if (nd->flags & LOOKUP_DIRECTORY) - return 0; - /* Are we trying to write to a read only partition? */ - if (__mnt_is_readonly(nd->path.mnt) && - (nd->intent.open.flags & (O_CREAT|O_TRUNC|O_ACCMODE))) - return 0; - return 1; -} - static fmode_t flags_to_mode(int flags) { fmode_t res = (__force fmode_t)flags & FMODE_EXEC; @@ -1543,10 +1525,12 @@ static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd) if (nd->flags & LOOKUP_RCU) return -ECHILD; - inode = dentry->d_inode; - if (!is_atomic_open(nd) || d_mountpoint(dentry)) + if (!(nd->flags & LOOKUP_OPEN) || (nd->flags & LOOKUP_DIRECTORY)) + goto no_open; + if (d_mountpoint(dentry)) goto no_open; + inode = dentry->d_inode; parent = dget_parent(dentry); dir = parent->d_inode; -- 2.20.1