1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef _LINUX_SUNRPC_RPC_PIPE_FS_H
3*4882a593Smuzhiyun #define _LINUX_SUNRPC_RPC_PIPE_FS_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <linux/workqueue.h>
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun struct rpc_pipe_dir_head {
8*4882a593Smuzhiyun struct list_head pdh_entries;
9*4882a593Smuzhiyun struct dentry *pdh_dentry;
10*4882a593Smuzhiyun };
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun struct rpc_pipe_dir_object_ops;
13*4882a593Smuzhiyun struct rpc_pipe_dir_object {
14*4882a593Smuzhiyun struct list_head pdo_head;
15*4882a593Smuzhiyun const struct rpc_pipe_dir_object_ops *pdo_ops;
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun void *pdo_data;
18*4882a593Smuzhiyun };
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun struct rpc_pipe_dir_object_ops {
21*4882a593Smuzhiyun int (*create)(struct dentry *dir,
22*4882a593Smuzhiyun struct rpc_pipe_dir_object *pdo);
23*4882a593Smuzhiyun void (*destroy)(struct dentry *dir,
24*4882a593Smuzhiyun struct rpc_pipe_dir_object *pdo);
25*4882a593Smuzhiyun };
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun struct rpc_pipe_msg {
28*4882a593Smuzhiyun struct list_head list;
29*4882a593Smuzhiyun void *data;
30*4882a593Smuzhiyun size_t len;
31*4882a593Smuzhiyun size_t copied;
32*4882a593Smuzhiyun int errno;
33*4882a593Smuzhiyun };
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun struct rpc_pipe_ops {
36*4882a593Smuzhiyun ssize_t (*upcall)(struct file *, struct rpc_pipe_msg *, char __user *, size_t);
37*4882a593Smuzhiyun ssize_t (*downcall)(struct file *, const char __user *, size_t);
38*4882a593Smuzhiyun void (*release_pipe)(struct inode *);
39*4882a593Smuzhiyun int (*open_pipe)(struct inode *);
40*4882a593Smuzhiyun void (*destroy_msg)(struct rpc_pipe_msg *);
41*4882a593Smuzhiyun };
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun struct rpc_pipe {
44*4882a593Smuzhiyun struct list_head pipe;
45*4882a593Smuzhiyun struct list_head in_upcall;
46*4882a593Smuzhiyun struct list_head in_downcall;
47*4882a593Smuzhiyun int pipelen;
48*4882a593Smuzhiyun int nreaders;
49*4882a593Smuzhiyun int nwriters;
50*4882a593Smuzhiyun #define RPC_PIPE_WAIT_FOR_OPEN 1
51*4882a593Smuzhiyun int flags;
52*4882a593Smuzhiyun struct delayed_work queue_timeout;
53*4882a593Smuzhiyun const struct rpc_pipe_ops *ops;
54*4882a593Smuzhiyun spinlock_t lock;
55*4882a593Smuzhiyun struct dentry *dentry;
56*4882a593Smuzhiyun };
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun struct rpc_inode {
59*4882a593Smuzhiyun struct inode vfs_inode;
60*4882a593Smuzhiyun void *private;
61*4882a593Smuzhiyun struct rpc_pipe *pipe;
62*4882a593Smuzhiyun wait_queue_head_t waitq;
63*4882a593Smuzhiyun };
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun static inline struct rpc_inode *
RPC_I(struct inode * inode)66*4882a593Smuzhiyun RPC_I(struct inode *inode)
67*4882a593Smuzhiyun {
68*4882a593Smuzhiyun return container_of(inode, struct rpc_inode, vfs_inode);
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun enum {
72*4882a593Smuzhiyun SUNRPC_PIPEFS_NFS_PRIO,
73*4882a593Smuzhiyun SUNRPC_PIPEFS_RPC_PRIO,
74*4882a593Smuzhiyun };
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun extern int rpc_pipefs_notifier_register(struct notifier_block *);
77*4882a593Smuzhiyun extern void rpc_pipefs_notifier_unregister(struct notifier_block *);
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun enum {
80*4882a593Smuzhiyun RPC_PIPEFS_MOUNT,
81*4882a593Smuzhiyun RPC_PIPEFS_UMOUNT,
82*4882a593Smuzhiyun };
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun extern struct dentry *rpc_d_lookup_sb(const struct super_block *sb,
85*4882a593Smuzhiyun const unsigned char *dir_name);
86*4882a593Smuzhiyun extern int rpc_pipefs_init_net(struct net *net);
87*4882a593Smuzhiyun extern void rpc_pipefs_exit_net(struct net *net);
88*4882a593Smuzhiyun extern struct super_block *rpc_get_sb_net(const struct net *net);
89*4882a593Smuzhiyun extern void rpc_put_sb_net(const struct net *net);
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun extern ssize_t rpc_pipe_generic_upcall(struct file *, struct rpc_pipe_msg *,
92*4882a593Smuzhiyun char __user *, size_t);
93*4882a593Smuzhiyun extern int rpc_queue_upcall(struct rpc_pipe *, struct rpc_pipe_msg *);
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun struct rpc_clnt;
96*4882a593Smuzhiyun extern struct dentry *rpc_create_client_dir(struct dentry *, const char *, struct rpc_clnt *);
97*4882a593Smuzhiyun extern int rpc_remove_client_dir(struct rpc_clnt *);
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun extern void rpc_init_pipe_dir_head(struct rpc_pipe_dir_head *pdh);
100*4882a593Smuzhiyun extern void rpc_init_pipe_dir_object(struct rpc_pipe_dir_object *pdo,
101*4882a593Smuzhiyun const struct rpc_pipe_dir_object_ops *pdo_ops,
102*4882a593Smuzhiyun void *pdo_data);
103*4882a593Smuzhiyun extern int rpc_add_pipe_dir_object(struct net *net,
104*4882a593Smuzhiyun struct rpc_pipe_dir_head *pdh,
105*4882a593Smuzhiyun struct rpc_pipe_dir_object *pdo);
106*4882a593Smuzhiyun extern void rpc_remove_pipe_dir_object(struct net *net,
107*4882a593Smuzhiyun struct rpc_pipe_dir_head *pdh,
108*4882a593Smuzhiyun struct rpc_pipe_dir_object *pdo);
109*4882a593Smuzhiyun extern struct rpc_pipe_dir_object *rpc_find_or_alloc_pipe_dir_object(
110*4882a593Smuzhiyun struct net *net,
111*4882a593Smuzhiyun struct rpc_pipe_dir_head *pdh,
112*4882a593Smuzhiyun int (*match)(struct rpc_pipe_dir_object *, void *),
113*4882a593Smuzhiyun struct rpc_pipe_dir_object *(*alloc)(void *),
114*4882a593Smuzhiyun void *data);
115*4882a593Smuzhiyun
116*4882a593Smuzhiyun struct cache_detail;
117*4882a593Smuzhiyun extern struct dentry *rpc_create_cache_dir(struct dentry *,
118*4882a593Smuzhiyun const char *,
119*4882a593Smuzhiyun umode_t umode,
120*4882a593Smuzhiyun struct cache_detail *);
121*4882a593Smuzhiyun extern void rpc_remove_cache_dir(struct dentry *);
122*4882a593Smuzhiyun
123*4882a593Smuzhiyun struct rpc_pipe *rpc_mkpipe_data(const struct rpc_pipe_ops *ops, int flags);
124*4882a593Smuzhiyun void rpc_destroy_pipe_data(struct rpc_pipe *pipe);
125*4882a593Smuzhiyun extern struct dentry *rpc_mkpipe_dentry(struct dentry *, const char *, void *,
126*4882a593Smuzhiyun struct rpc_pipe *);
127*4882a593Smuzhiyun extern int rpc_unlink(struct dentry *);
128*4882a593Smuzhiyun extern int register_rpc_pipefs(void);
129*4882a593Smuzhiyun extern void unregister_rpc_pipefs(void);
130*4882a593Smuzhiyun
131*4882a593Smuzhiyun extern bool gssd_running(struct net *net);
132*4882a593Smuzhiyun
133*4882a593Smuzhiyun #endif
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