linux-kernel - [PATCH 03/10] coda: honor AT_STATX_DONT

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Message-Id: <1505896805-12055-4-git-send-email-mszeredi@redhat.com>
Date:   Wed, 20 Sep 2017 10:39:58 +0200
From:   Miklos Szeredi <mszeredi@...hat.com>
To:     linux-fsdevel@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Al Viro <viro@...iv.linux.org.uk>,
        David Howells <dhowells@...hat.com>,
        Jan Harkes <jaharkes@...cmu.edu>
Subject: [PATCH 03/10] coda: honor AT_STATX_DONT_SYNC

The description of this flag says "Don't sync attributes with the server".
In other words: always use the attributes cached in the kernel and don't
send network or local messages to refresh the attributes.

Signed-off-by: Miklos Szeredi <mszeredi@...hat.com>
Cc: Jan Harkes <jaharkes@...cmu.edu>
---
 fs/coda/inode.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index 6058df380cc0..734672b2cbdc 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -255,7 +255,10 @@ static void coda_evict_inode(struct inode *inode)
 int coda_getattr(const struct path *path, struct kstat *stat,
 		 u32 request_mask, unsigned int flags)
 {
-	int err = coda_revalidate_inode(d_inode(path->dentry));
+	int err = 0;
+
+	if (!(flags & AT_STATX_DONT_SYNC))
+		err = coda_revalidate_inode(d_inode(path->dentry));
 	if (!err)
 		generic_fillattr(d_inode(path->dentry), stat);
 	return err;
-- 
2.5.5