linux-kernel - [PATCH 2/3] ceph: update atime after read-operation.

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Message-ID: <201307021345043628495@gmail.com>
Date:	Tue, 2 Jul 2013 13:45:08 +0800
From:	majianpeng <majianpeng@...il.com>
To:	sage <sage@...tank.com>
Cc:	ceph-devel <ceph-devel@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/3] ceph: update atime after read-operation.

Now ceph don't support updating atime after read-operation if the open
mode is CEPH_CAP_FILE_RD.There are two reasons:
1:in client of fs,it don't set dirty cap of CEPH_CAP_FILE_RD.
2:in mds,it only update the atime if the condition
"dirty & (CEPH_CAP_FILE_EXCL|CEPH_CAP_FILE_WR) is true.
But if we can read, we can update atime. This patch only modify client to
support.

Signed-off-by: Jianpeng Ma <majianpeng@...il.com>
---
 fs/ceph/file.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 87df15a..9daea70 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -672,6 +672,15 @@ again:
 out:
 	dout("aio_read %p %llx.%llx dropping cap refs on %s = %d\n",
 	     inode, ceph_vinop(inode), ceph_cap_string(got), (int)ret);
+
+	if (ret >= 0) {
+		int dirty;
+		spin_lock(&ci->i_ceph_lock);
+		dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_RD);
+		spin_unlock(&ci->i_ceph_lock);
+		if (dirty)
+			__mark_inode_dirty(inode, dirty);
+	}
 	ceph_put_cap_refs(ci, got);
 
 	if (checkeof && ret >= 0) {
-- 
1.8.1.2