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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2011-02-28 14:34:02 +0300
committerEric Van Hensbergen <ericvh@gmail.com>2011-03-15 17:57:39 +0300
commita78ce05d5d342297b66122eda8add4eefa21f8a8 (patch)
tree84b9b4009ba0279ffbbc79382bbdbc6f168f23d8 /fs/9p/v9fs.c
parenta12119087bd803d3fa0b067ee18497e2e5d064cd (diff)
downloadlinux-a78ce05d5d342297b66122eda8add4eefa21f8a8.tar.xz
fs/9p: Add v9fs_inode
Switch to the fscache code to v9fs_inode. We will later use v9fs_inode in cache=loose mode to track the inode cache validity timeout. Ie if we find an inode in cache older that a specific jiffie range we will consider it stale Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'fs/9p/v9fs.c')
-rw-r--r--fs/9p/v9fs.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index 738be8f6994f..c82b017f51f3 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -39,6 +39,7 @@
static DEFINE_SPINLOCK(v9fs_sessionlist_lock);
static LIST_HEAD(v9fs_sessionlist);
+struct kmem_cache *v9fs_inode_cache;
/*
* Option Parsing (code inspired by NFS code)
@@ -481,6 +482,63 @@ static void v9fs_sysfs_cleanup(void)
kobject_put(v9fs_kobj);
}
+static void v9fs_inode_init_once(void *foo)
+{
+ struct v9fs_inode *v9inode = (struct v9fs_inode *)foo;
+#ifdef CONFIG_9P_FSCACHE
+ v9inode->fscache = NULL;
+ v9inode->fscache_key = NULL;
+#endif
+ inode_init_once(&v9inode->vfs_inode);
+}
+
+/**
+ * v9fs_init_inode_cache - initialize a cache for 9P
+ * Returns 0 on success.
+ */
+static int v9fs_init_inode_cache(void)
+{
+ v9fs_inode_cache = kmem_cache_create("v9fs_inode_cache",
+ sizeof(struct v9fs_inode),
+ 0, (SLAB_RECLAIM_ACCOUNT|
+ SLAB_MEM_SPREAD),
+ v9fs_inode_init_once);
+ if (!v9fs_inode_cache)
+ return -ENOMEM;
+
+ return 0;
+}
+
+/**
+ * v9fs_destroy_inode_cache - destroy the cache of 9P inode
+ *
+ */
+static void v9fs_destroy_inode_cache(void)
+{
+ kmem_cache_destroy(v9fs_inode_cache);
+}
+
+static int v9fs_cache_register(void)
+{
+ int ret;
+ ret = v9fs_init_inode_cache();
+ if (ret < 0)
+ return ret;
+#ifdef CONFIG_9P_FSCACHE
+ return fscache_register_netfs(&v9fs_cache_netfs);
+#else
+ return ret;
+#endif
+}
+
+static void v9fs_cache_unregister(void)
+{
+ v9fs_destroy_inode_cache();
+#ifdef CONFIG_9P_FSCACHE
+ fscache_unregister_netfs(&v9fs_cache_netfs);
+#endif
+}
+
/**
* init_v9fs - Initialize module
*