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#ifndef _LINUX_SUNRPC_RPC_PIPE_FS_H
#define _LINUX_SUNRPC_RPC_PIPE_FS_H
#ifdef __KERNEL__
#include <linux/workqueue.h>
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_inode {
struct inode vfs_inode;
void *private;
struct list_head pipe;
struct list_head in_upcall;
struct list_head in_downcall;
int pipelen;
int nreaders;
int nwriters;
wait_queue_head_t waitq;
#define RPC_PIPE_WAIT_FOR_OPEN 1
int flags;
struct delayed_work queue_timeout;
const struct rpc_pipe_ops *ops;
spinlock_t lock;
};
static inline struct rpc_inode *
RPC_I(struct inode *inode)
{
return container_of(inode, struct rpc_inode, vfs_inode);
}
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 void rpc_pipefs_init_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 inode *, struct rpc_pipe_msg *);
struct rpc_clnt;
extern struct dentry *rpc_create_client_dir(struct dentry *, struct qstr *, struct rpc_clnt *);
extern int rpc_remove_client_dir(struct dentry *);
struct cache_detail;
extern struct dentry *rpc_create_cache_dir(struct dentry *,
struct qstr *,
umode_t umode,
struct cache_detail *);
extern void rpc_remove_cache_dir(struct dentry *);
extern struct dentry *rpc_mkpipe(struct dentry *, const char *, void *,
const struct rpc_pipe_ops *, int flags);
extern int rpc_unlink(struct dentry *);
extern struct vfsmount *rpc_get_mount(void);
extern void rpc_put_mount(void);
extern int register_rpc_pipefs(void);
extern void unregister_rpc_pipefs(void);
#endif
#endif
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