298fc3558b
Add support for looking up existing objects and creating new ones if there is no match. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
134 lines
3.6 KiB
C
134 lines
3.6 KiB
C
#ifndef _LINUX_SUNRPC_RPC_PIPE_FS_H
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#define _LINUX_SUNRPC_RPC_PIPE_FS_H
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#ifdef __KERNEL__
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#include <linux/workqueue.h>
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struct rpc_pipe_dir_head {
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struct list_head pdh_entries;
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struct dentry *pdh_dentry;
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};
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struct rpc_pipe_dir_object_ops;
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struct rpc_pipe_dir_object {
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struct list_head pdo_head;
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const struct rpc_pipe_dir_object_ops *pdo_ops;
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void *pdo_data;
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};
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struct rpc_pipe_dir_object_ops {
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int (*create)(struct dentry *dir,
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struct rpc_pipe_dir_object *pdo);
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void (*destroy)(struct dentry *dir,
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struct rpc_pipe_dir_object *pdo);
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};
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struct rpc_pipe_msg {
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struct list_head list;
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void *data;
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size_t len;
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size_t copied;
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int errno;
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};
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struct rpc_pipe_ops {
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ssize_t (*upcall)(struct file *, struct rpc_pipe_msg *, char __user *, size_t);
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ssize_t (*downcall)(struct file *, const char __user *, size_t);
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void (*release_pipe)(struct inode *);
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int (*open_pipe)(struct inode *);
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void (*destroy_msg)(struct rpc_pipe_msg *);
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};
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struct rpc_pipe {
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struct list_head pipe;
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struct list_head in_upcall;
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struct list_head in_downcall;
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int pipelen;
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int nreaders;
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int nwriters;
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#define RPC_PIPE_WAIT_FOR_OPEN 1
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int flags;
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struct delayed_work queue_timeout;
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const struct rpc_pipe_ops *ops;
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spinlock_t lock;
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struct dentry *dentry;
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};
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struct rpc_inode {
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struct inode vfs_inode;
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void *private;
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struct rpc_pipe *pipe;
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wait_queue_head_t waitq;
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};
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static inline struct rpc_inode *
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RPC_I(struct inode *inode)
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{
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return container_of(inode, struct rpc_inode, vfs_inode);
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}
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enum {
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SUNRPC_PIPEFS_NFS_PRIO,
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SUNRPC_PIPEFS_RPC_PRIO,
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};
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extern int rpc_pipefs_notifier_register(struct notifier_block *);
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extern void rpc_pipefs_notifier_unregister(struct notifier_block *);
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enum {
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RPC_PIPEFS_MOUNT,
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RPC_PIPEFS_UMOUNT,
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};
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extern struct dentry *rpc_d_lookup_sb(const struct super_block *sb,
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const unsigned char *dir_name);
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extern void rpc_pipefs_init_net(struct net *net);
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extern struct super_block *rpc_get_sb_net(const struct net *net);
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extern void rpc_put_sb_net(const struct net *net);
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extern ssize_t rpc_pipe_generic_upcall(struct file *, struct rpc_pipe_msg *,
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char __user *, size_t);
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extern int rpc_queue_upcall(struct rpc_pipe *, struct rpc_pipe_msg *);
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struct rpc_clnt;
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extern struct dentry *rpc_create_client_dir(struct dentry *, const char *, struct rpc_clnt *);
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extern int rpc_remove_client_dir(struct rpc_clnt *);
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extern void rpc_init_pipe_dir_head(struct rpc_pipe_dir_head *pdh);
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extern void rpc_init_pipe_dir_object(struct rpc_pipe_dir_object *pdo,
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const struct rpc_pipe_dir_object_ops *pdo_ops,
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void *pdo_data);
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extern int rpc_add_pipe_dir_object(struct net *net,
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struct rpc_pipe_dir_head *pdh,
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struct rpc_pipe_dir_object *pdo);
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extern void rpc_remove_pipe_dir_object(struct net *net,
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struct rpc_pipe_dir_head *pdh,
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struct rpc_pipe_dir_object *pdo);
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extern struct rpc_pipe_dir_object *rpc_find_or_alloc_pipe_dir_object(
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struct net *net,
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struct rpc_pipe_dir_head *pdh,
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int (*match)(struct rpc_pipe_dir_object *, void *),
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struct rpc_pipe_dir_object *(*alloc)(void *),
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void *data);
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struct cache_detail;
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extern struct dentry *rpc_create_cache_dir(struct dentry *,
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const char *,
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umode_t umode,
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struct cache_detail *);
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extern void rpc_remove_cache_dir(struct dentry *);
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extern int rpc_rmdir(struct dentry *dentry);
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struct rpc_pipe *rpc_mkpipe_data(const struct rpc_pipe_ops *ops, int flags);
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void rpc_destroy_pipe_data(struct rpc_pipe *pipe);
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extern struct dentry *rpc_mkpipe_dentry(struct dentry *, const char *, void *,
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struct rpc_pipe *);
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extern int rpc_unlink(struct dentry *);
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extern int register_rpc_pipefs(void);
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extern void unregister_rpc_pipefs(void);
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#endif
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#endif
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