/* SPDX-License-Identifier: GPL-2.0 */
|
#ifndef _LINUX_SUNRPC_RPC_PIPE_FS_H
|
#define _LINUX_SUNRPC_RPC_PIPE_FS_H
|
|
#include <linux/workqueue.h>
|
|
struct rpc_pipe_dir_head {
|
struct list_head pdh_entries;
|
struct dentry *pdh_dentry;
|
};
|
|
struct rpc_pipe_dir_object_ops;
|
struct rpc_pipe_dir_object {
|
struct list_head pdo_head;
|
const struct rpc_pipe_dir_object_ops *pdo_ops;
|
|
void *pdo_data;
|
};
|
|
struct rpc_pipe_dir_object_ops {
|
int (*create)(struct dentry *dir,
|
struct rpc_pipe_dir_object *pdo);
|
void (*destroy)(struct dentry *dir,
|
struct rpc_pipe_dir_object *pdo);
|
};
|
|
struct rpc_pipe_msg {
|
struct list_head list;
|
void *data;
|
size_t len;
|
size_t copied;
|
int errno;
|
};
|
|
struct rpc_pipe_ops {
|
ssize_t (*upcall)(struct file *, struct rpc_pipe_msg *, char __user *, size_t);
|
ssize_t (*downcall)(struct file *, const char __user *, size_t);
|
void (*release_pipe)(struct inode *);
|
int (*open_pipe)(struct inode *);
|
void (*destroy_msg)(struct rpc_pipe_msg *);
|
};
|
|
struct rpc_pipe {
|
struct list_head pipe;
|
struct list_head in_upcall;
|
struct list_head in_downcall;
|
int pipelen;
|
int nreaders;
|
int nwriters;
|
#define RPC_PIPE_WAIT_FOR_OPEN 1
|
int flags;
|
struct delayed_work queue_timeout;
|
const struct rpc_pipe_ops *ops;
|
spinlock_t lock;
|
struct dentry *dentry;
|
};
|
|
struct rpc_inode {
|
struct inode vfs_inode;
|
void *private;
|
struct rpc_pipe *pipe;
|
wait_queue_head_t waitq;
|
};
|
|
static inline struct rpc_inode *
|
RPC_I(struct inode *inode)
|
{
|
return container_of(inode, struct rpc_inode, vfs_inode);
|
}
|
|
enum {
|
SUNRPC_PIPEFS_NFS_PRIO,
|
SUNRPC_PIPEFS_RPC_PRIO,
|
};
|
|
extern int rpc_pipefs_notifier_register(struct notifier_block *);
|
extern void rpc_pipefs_notifier_unregister(struct notifier_block *);
|
|
enum {
|
RPC_PIPEFS_MOUNT,
|
RPC_PIPEFS_UMOUNT,
|
};
|
|
extern struct dentry *rpc_d_lookup_sb(const struct super_block *sb,
|
const unsigned char *dir_name);
|
extern int rpc_pipefs_init_net(struct net *net);
|
extern void rpc_pipefs_exit_net(struct net *net);
|
extern struct super_block *rpc_get_sb_net(const struct net *net);
|
extern void rpc_put_sb_net(const struct net *net);
|
|
extern ssize_t rpc_pipe_generic_upcall(struct file *, struct rpc_pipe_msg *,
|
char __user *, size_t);
|
extern int rpc_queue_upcall(struct rpc_pipe *, struct rpc_pipe_msg *);
|
|
struct rpc_clnt;
|
extern struct dentry *rpc_create_client_dir(struct dentry *, const char *, struct rpc_clnt *);
|
extern int rpc_remove_client_dir(struct rpc_clnt *);
|
|
extern void rpc_init_pipe_dir_head(struct rpc_pipe_dir_head *pdh);
|
extern void rpc_init_pipe_dir_object(struct rpc_pipe_dir_object *pdo,
|
const struct rpc_pipe_dir_object_ops *pdo_ops,
|
void *pdo_data);
|
extern int rpc_add_pipe_dir_object(struct net *net,
|
struct rpc_pipe_dir_head *pdh,
|
struct rpc_pipe_dir_object *pdo);
|
extern void rpc_remove_pipe_dir_object(struct net *net,
|
struct rpc_pipe_dir_head *pdh,
|
struct rpc_pipe_dir_object *pdo);
|
extern struct rpc_pipe_dir_object *rpc_find_or_alloc_pipe_dir_object(
|
struct net *net,
|
struct rpc_pipe_dir_head *pdh,
|
int (*match)(struct rpc_pipe_dir_object *, void *),
|
struct rpc_pipe_dir_object *(*alloc)(void *),
|
void *data);
|
|
struct cache_detail;
|
extern struct dentry *rpc_create_cache_dir(struct dentry *,
|
const char *,
|
umode_t umode,
|
struct cache_detail *);
|
extern void rpc_remove_cache_dir(struct dentry *);
|
|
struct rpc_pipe *rpc_mkpipe_data(const struct rpc_pipe_ops *ops, int flags);
|
void rpc_destroy_pipe_data(struct rpc_pipe *pipe);
|
extern struct dentry *rpc_mkpipe_dentry(struct dentry *, const char *, void *,
|
struct rpc_pipe *);
|
extern int rpc_unlink(struct dentry *);
|
extern int register_rpc_pipefs(void);
|
extern void unregister_rpc_pipefs(void);
|
|
extern bool gssd_running(struct net *net);
|
|
#endif
|
