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SUNRPC: split cache creation and PipeFS registration

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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>
This commit is contained in:
Stanislav Kinsbursky 2011-11-25 17:12:40 +03:00 committed by Trond Myklebust
parent 30507f58ce
commit 820f9442e7
3 changed files with 10 additions and 7 deletions
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3
fs/nfs/cache_lib.c
View file

@ -120,6 +120,7 @@ int nfs_cache_register(struct cache_detail *cd)
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 @@ int nfs_cache_register(struct cache_detail *cd)
if (!ret)
return ret;
err:
sunrpc_destroy_cache_detail(cd);
rpc_put_mount();
return ret;
}
@ -135,6 +137,7 @@ int nfs_cache_register(struct cache_detail *cd)
void nfs_cache_unregister(struct cache_detail *cd)
{
sunrpc_cache_unregister_pipefs(cd);
sunrpc_destroy_cache_detail(cd);
rpc_put_mount();
}

2
include/linux/sunrpc/cache.h
View file

@ -202,6 +202,8 @@ extern int cache_register_net(struct cache_detail *cd, struct net *net);
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 *);

12
net/sunrpc/cache.c
View file

@ -344,7 +344,7 @@ static int current_index;
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 @@ static void sunrpc_init_cache_detail(struct cache_detail *cd)
/* 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 @@ static void sunrpc_destroy_cache_detail(struct cache_detail *cd)
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 @@ int sunrpc_cache_register_pipefs(struct dentry *parent,
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 @@ void sunrpc_cache_unregister_pipefs(struct cache_detail *cd)
{
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);