From 9f12bd119e408388233e7aeb1152f372a8b5dcad Mon Sep 17 00:00:00 2001
From: "Yan, Zheng" <zheng.z.yan@intel.com>
Date: Fri, 20 Sep 2013 19:55:31 +0800
Subject: [PATCH] ceph: drop unconnected inodes
Positve dentry and corresponding inode are always accompanied in MDS reply.
So no need to keep inode in the cache after dropping all its aliases.
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>
---
fs/ceph/inode.c | 10 ++++++++++
fs/ceph/super.c | 1 +
fs/ceph/super.h | 1 +
3 files changed, 12 insertions(+)
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 278fd2891288..d37b2dc01d3f 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -436,6 +436,16 @@ void ceph_destroy_inode(struct inode *inode)
call_rcu(&inode->i_rcu, ceph_i_callback);
}
+int ceph_drop_inode(struct inode *inode)
+{
+ /*
+ * Positve dentry and corresponding inode are always accompanied
+ * in MDS reply. So no need to keep inode in the cache after
+ * dropping all its aliases.
+ */
+ return 1;
+}
+
/*
* Helpers to fill in size, ctime, mtime, and atime. We have to be
* careful because either the client or MDS may have more up to date
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 6a0951e43044..e58bd4a23bfb 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -686,6 +686,7 @@ static const struct super_operations ceph_super_ops = {
.alloc_inode = ceph_alloc_inode,
.destroy_inode = ceph_destroy_inode,
.write_inode = ceph_write_inode,
+ .drop_inode = ceph_drop_inode,
.sync_fs = ceph_sync_fs,
.put_super = ceph_put_super,
.show_options = ceph_show_options,
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index ef4ac38bb614..8de94b564d67 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -691,6 +691,7 @@ extern const struct inode_operations ceph_file_iops;
extern struct inode *ceph_alloc_inode(struct super_block *sb);
extern void ceph_destroy_inode(struct inode *inode);
+extern int ceph_drop_inode(struct inode *inode);
extern struct inode *ceph_get_inode(struct super_block *sb,
struct ceph_vino vino);
--
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