diff options
Diffstat (limited to 'include/linux/nfslocalio.h')
| -rw-r--r-- | include/linux/nfslocalio.h | 48 |
1 files changed, 34 insertions, 14 deletions
diff --git a/include/linux/nfslocalio.h b/include/linux/nfslocalio.h index 9202f4b24343..9aa8a43843d7 100644 --- a/include/linux/nfslocalio.h +++ b/include/linux/nfslocalio.h @@ -6,9 +6,6 @@ #ifndef __LINUX_NFSLOCALIO_H #define __LINUX_NFSLOCALIO_H -/* nfsd_file structure is purposely kept opaque to NFS client */ -struct nfsd_file; - #if IS_ENABLED(CONFIG_NFS_LOCALIO) #include <linux/module.h> @@ -19,6 +16,9 @@ struct nfsd_file; #include <linux/nfs.h> #include <net/net_namespace.h> +struct nfs_client; +struct nfs_file_localio; + /* * Useful to allow a client to negotiate if localio * possible with its server. @@ -27,28 +27,38 @@ struct nfsd_file; */ typedef struct { uuid_t uuid; + unsigned nfs3_localio_probe_count; + /* this struct is over a cacheline, avoid bouncing */ + spinlock_t ____cacheline_aligned lock; struct list_head list; + spinlock_t *list_lock; /* nn->local_clients_lock */ struct net __rcu *net; /* nfsd's network namespace */ struct auth_domain *dom; /* auth_domain for localio */ + /* Local files to close when net is shut down or exports change */ + struct list_head files; } nfs_uuid_t; void nfs_uuid_init(nfs_uuid_t *); bool nfs_uuid_begin(nfs_uuid_t *); void nfs_uuid_end(nfs_uuid_t *); -void nfs_uuid_is_local(const uuid_t *, struct list_head *, +void nfs_uuid_is_local(const uuid_t *, struct list_head *, spinlock_t *, struct net *, struct auth_domain *, struct module *); -void nfs_uuid_invalidate_clients(struct list_head *list); -void nfs_uuid_invalidate_one_client(nfs_uuid_t *nfs_uuid); + +void nfs_localio_enable_client(struct nfs_client *clp); +void nfs_localio_disable_client(struct nfs_client *clp); +void nfs_localio_invalidate_clients(struct list_head *nn_local_clients, + spinlock_t *nn_local_clients_lock); /* localio needs to map filehandle -> struct nfsd_file */ extern struct nfsd_file * nfsd_open_local_fh(struct net *, struct auth_domain *, struct rpc_clnt *, const struct cred *, const struct nfs_fh *, const fmode_t) __must_hold(rcu); +void nfs_close_local_fh(struct nfs_file_localio *); struct nfsd_localio_operations { - bool (*nfsd_serv_try_get)(struct net *); - void (*nfsd_serv_put)(struct net *); + bool (*nfsd_net_try_get)(struct net *); + void (*nfsd_net_put)(struct net *); struct nfsd_file *(*nfsd_open_local_fh)(struct net *, struct auth_domain *, struct rpc_clnt *, @@ -56,6 +66,8 @@ struct nfsd_localio_operations { const struct nfs_fh *, const fmode_t); struct net *(*nfsd_file_put_local)(struct nfsd_file *); + struct nfsd_file *(*nfsd_file_get)(struct nfsd_file *); + void (*nfsd_file_put)(struct nfsd_file *); struct file *(*nfsd_file_file)(struct nfsd_file *); } ____cacheline_aligned; @@ -64,17 +76,18 @@ extern const struct nfsd_localio_operations *nfs_to; struct nfsd_file *nfs_open_local_fh(nfs_uuid_t *, struct rpc_clnt *, const struct cred *, - const struct nfs_fh *, const fmode_t); + const struct nfs_fh *, struct nfs_file_localio *, + const fmode_t); static inline void nfs_to_nfsd_net_put(struct net *net) { /* - * Once reference to nfsd_serv is dropped, NFSD could be - * unloaded, so ensure safe return from nfsd_file_put_local() - * by always taking RCU. + * Once reference to net (and associated nfsd_serv) is dropped, NFSD + * could be unloaded, so ensure safe return from nfsd_net_put() by + * always taking RCU. */ rcu_read_lock(); - nfs_to->nfsd_serv_put(net); + nfs_to->nfsd_net_put(net); rcu_read_unlock(); } @@ -91,12 +104,19 @@ static inline void nfs_to_nfsd_file_put_local(struct nfsd_file *localio) } #else /* CONFIG_NFS_LOCALIO */ + +struct nfs_file_localio; +static inline void nfs_close_local_fh(struct nfs_file_localio *nfl) +{ +} static inline void nfsd_localio_ops_init(void) { } -static inline void nfs_to_nfsd_file_put_local(struct nfsd_file *localio) +struct nfs_client; +static inline void nfs_localio_disable_client(struct nfs_client *clp) { } + #endif /* CONFIG_NFS_LOCALIO */ #endif /* __LINUX_NFSLOCALIO_H */ |