SUNRPC: split cache creation and PipeFS registration
This precursor patch splits SUNRPC cache creation and PipeFS registartion.
It's required for latter split of NFS DNS resolver cache creation per network
namespace context and PipeFS registration/unregistration on MOUNT/UMOUNT
events.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/cache_lib.c b/fs/nfs/cache_lib.c
index c98b439..d62a895 100644
--- a/fs/nfs/cache_lib.c
+++ b/fs/nfs/cache_lib.c
@@ -120,6 +120,7 @@
mnt = rpc_get_mount();
if (IS_ERR(mnt))
return PTR_ERR(mnt);
+ sunrpc_init_cache_detail(cd);
ret = vfs_path_lookup(mnt->mnt_root, mnt, "/cache", 0, &path);
if (ret)
goto err;
@@ -128,6 +129,7 @@
if (!ret)
return ret;
err:
+ sunrpc_destroy_cache_detail(cd);
rpc_put_mount();
return ret;
}
@@ -135,6 +137,7 @@
void nfs_cache_unregister(struct cache_detail *cd)
{
sunrpc_cache_unregister_pipefs(cd);
+ sunrpc_destroy_cache_detail(cd);
rpc_put_mount();
}
diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index 57531f8..590a8ab 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h
@@ -202,6 +202,8 @@
extern void cache_unregister(struct cache_detail *cd);
extern void cache_unregister_net(struct cache_detail *cd, struct net *net);
+extern void sunrpc_init_cache_detail(struct cache_detail *cd);
+extern void sunrpc_destroy_cache_detail(struct cache_detail *cd);
extern int sunrpc_cache_register_pipefs(struct dentry *parent, const char *,
umode_t, struct cache_detail *);
extern void sunrpc_cache_unregister_pipefs(struct cache_detail *);
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 465df9a..fefe067 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -344,7 +344,7 @@
static void do_cache_clean(struct work_struct *work);
static struct delayed_work cache_cleaner;
-static void sunrpc_init_cache_detail(struct cache_detail *cd)
+void sunrpc_init_cache_detail(struct cache_detail *cd)
{
rwlock_init(&cd->hash_lock);
INIT_LIST_HEAD(&cd->queue);
@@ -360,8 +360,9 @@
/* start the cleaning process */
schedule_delayed_work(&cache_cleaner, 0);
}
+EXPORT_SYMBOL_GPL(sunrpc_init_cache_detail);
-static void sunrpc_destroy_cache_detail(struct cache_detail *cd)
+void sunrpc_destroy_cache_detail(struct cache_detail *cd)
{
cache_purge(cd);
spin_lock(&cache_list_lock);
@@ -384,6 +385,7 @@
out:
printk(KERN_ERR "nfsd: failed to unregister %s cache\n", cd->name);
}
+EXPORT_SYMBOL_GPL(sunrpc_destroy_cache_detail);
/* clean cache tries to find something to clean
* and cleans it.
@@ -1787,17 +1789,14 @@
struct dentry *dir;
int ret = 0;
- sunrpc_init_cache_detail(cd);
q.name = name;
q.len = strlen(name);
q.hash = full_name_hash(q.name, q.len);
dir = rpc_create_cache_dir(parent, &q, umode, cd);
if (!IS_ERR(dir))
cd->u.pipefs.dir = dir;
- else {
- sunrpc_destroy_cache_detail(cd);
+ else
ret = PTR_ERR(dir);
- }
return ret;
}
EXPORT_SYMBOL_GPL(sunrpc_cache_register_pipefs);
@@ -1806,7 +1805,6 @@
{
rpc_remove_cache_dir(cd->u.pipefs.dir);
cd->u.pipefs.dir = NULL;
- sunrpc_destroy_cache_detail(cd);
}
EXPORT_SYMBOL_GPL(sunrpc_cache_unregister_pipefs);
