Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _LINUX_SUNRPC_RPC_PIPE_FS_H |
3 | #define _LINUX_SUNRPC_RPC_PIPE_FS_H | |
4 | ||
5 | #ifdef __KERNEL__ | |
6 | ||
4dceef96 BF |
7 | #include <linux/workqueue.h> |
8 | ||
6739ffb7 TM |
9 | struct rpc_pipe_dir_head { |
10 | struct list_head pdh_entries; | |
11 | struct dentry *pdh_dentry; | |
12 | }; | |
13 | ||
14 | struct rpc_pipe_dir_object_ops; | |
15 | struct rpc_pipe_dir_object { | |
16 | struct list_head pdo_head; | |
17 | const struct rpc_pipe_dir_object_ops *pdo_ops; | |
18 | ||
19 | void *pdo_data; | |
20 | }; | |
21 | ||
22 | struct rpc_pipe_dir_object_ops { | |
23 | int (*create)(struct dentry *dir, | |
24 | struct rpc_pipe_dir_object *pdo); | |
25 | void (*destroy)(struct dentry *dir, | |
26 | struct rpc_pipe_dir_object *pdo); | |
27 | }; | |
28 | ||
1da177e4 LT |
29 | struct rpc_pipe_msg { |
30 | struct list_head list; | |
31 | void *data; | |
32 | size_t len; | |
33 | size_t copied; | |
34 | int errno; | |
35 | }; | |
36 | ||
37 | struct rpc_pipe_ops { | |
38 | ssize_t (*upcall)(struct file *, struct rpc_pipe_msg *, char __user *, size_t); | |
39 | ssize_t (*downcall)(struct file *, const char __user *, size_t); | |
40 | void (*release_pipe)(struct inode *); | |
c3810608 | 41 | int (*open_pipe)(struct inode *); |
1da177e4 LT |
42 | void (*destroy_msg)(struct rpc_pipe_msg *); |
43 | }; | |
44 | ||
ba9e0975 | 45 | struct rpc_pipe { |
1da177e4 LT |
46 | struct list_head pipe; |
47 | struct list_head in_upcall; | |
6e84c7b6 | 48 | struct list_head in_downcall; |
1da177e4 LT |
49 | int pipelen; |
50 | int nreaders; | |
51 | int nwriters; | |
1da177e4 LT |
52 | #define RPC_PIPE_WAIT_FOR_OPEN 1 |
53 | int flags; | |
52bad64d | 54 | struct delayed_work queue_timeout; |
b693ba4a | 55 | const struct rpc_pipe_ops *ops; |
766347be | 56 | spinlock_t lock; |
c239d83b | 57 | struct dentry *dentry; |
1da177e4 LT |
58 | }; |
59 | ||
ba9e0975 SK |
60 | struct rpc_inode { |
61 | struct inode vfs_inode; | |
62 | void *private; | |
63 | struct rpc_pipe *pipe; | |
591ad7fe | 64 | wait_queue_head_t waitq; |
ba9e0975 SK |
65 | }; |
66 | ||
1da177e4 LT |
67 | static inline struct rpc_inode * |
68 | RPC_I(struct inode *inode) | |
69 | { | |
70 | return container_of(inode, struct rpc_inode, vfs_inode); | |
71 | } | |
72 | ||
eee17325 SK |
73 | enum { |
74 | SUNRPC_PIPEFS_NFS_PRIO, | |
75 | SUNRPC_PIPEFS_RPC_PRIO, | |
76 | }; | |
77 | ||
2d00131a SK |
78 | extern int rpc_pipefs_notifier_register(struct notifier_block *); |
79 | extern void rpc_pipefs_notifier_unregister(struct notifier_block *); | |
80 | ||
81 | enum { | |
82 | RPC_PIPEFS_MOUNT, | |
83 | RPC_PIPEFS_UMOUNT, | |
84 | }; | |
85 | ||
432eb1a5 SK |
86 | extern struct dentry *rpc_d_lookup_sb(const struct super_block *sb, |
87 | const unsigned char *dir_name); | |
4b9a445e JL |
88 | extern int rpc_pipefs_init_net(struct net *net); |
89 | extern void rpc_pipefs_exit_net(struct net *net); | |
c21a588f SK |
90 | extern struct super_block *rpc_get_sb_net(const struct net *net); |
91 | extern void rpc_put_sb_net(const struct net *net); | |
432eb1a5 | 92 | |
c1225158 PT |
93 | extern ssize_t rpc_pipe_generic_upcall(struct file *, struct rpc_pipe_msg *, |
94 | char __user *, size_t); | |
d706ed1f | 95 | extern int rpc_queue_upcall(struct rpc_pipe *, struct rpc_pipe_msg *); |
1da177e4 | 96 | |
458adb8b | 97 | struct rpc_clnt; |
a95e691f | 98 | extern struct dentry *rpc_create_client_dir(struct dentry *, const char *, struct rpc_clnt *); |
c36dcfe1 | 99 | extern int rpc_remove_client_dir(struct rpc_clnt *); |
6739ffb7 TM |
100 | |
101 | extern void rpc_init_pipe_dir_head(struct rpc_pipe_dir_head *pdh); | |
102 | extern void rpc_init_pipe_dir_object(struct rpc_pipe_dir_object *pdo, | |
103 | const struct rpc_pipe_dir_object_ops *pdo_ops, | |
104 | void *pdo_data); | |
105 | extern int rpc_add_pipe_dir_object(struct net *net, | |
106 | struct rpc_pipe_dir_head *pdh, | |
107 | struct rpc_pipe_dir_object *pdo); | |
108 | extern void rpc_remove_pipe_dir_object(struct net *net, | |
109 | struct rpc_pipe_dir_head *pdh, | |
110 | struct rpc_pipe_dir_object *pdo); | |
298fc355 TM |
111 | extern struct rpc_pipe_dir_object *rpc_find_or_alloc_pipe_dir_object( |
112 | struct net *net, | |
113 | struct rpc_pipe_dir_head *pdh, | |
114 | int (*match)(struct rpc_pipe_dir_object *, void *), | |
115 | struct rpc_pipe_dir_object *(*alloc)(void *), | |
116 | void *data); | |
8854e82d TM |
117 | |
118 | struct cache_detail; | |
119 | extern struct dentry *rpc_create_cache_dir(struct dentry *, | |
a95e691f | 120 | const char *, |
64f1426f | 121 | umode_t umode, |
8854e82d TM |
122 | struct cache_detail *); |
123 | extern void rpc_remove_cache_dir(struct dentry *); | |
124 | ||
eee17325 SK |
125 | extern int rpc_rmdir(struct dentry *dentry); |
126 | ||
c239d83b SK |
127 | struct rpc_pipe *rpc_mkpipe_data(const struct rpc_pipe_ops *ops, int flags); |
128 | void rpc_destroy_pipe_data(struct rpc_pipe *pipe); | |
129 | extern struct dentry *rpc_mkpipe_dentry(struct dentry *, const char *, void *, | |
130 | struct rpc_pipe *); | |
5d67476f | 131 | extern int rpc_unlink(struct dentry *); |
7531d692 TM |
132 | extern int register_rpc_pipefs(void); |
133 | extern void unregister_rpc_pipefs(void); | |
1da177e4 | 134 | |
89f84243 JL |
135 | extern bool gssd_running(struct net *net); |
136 | ||
1da177e4 LT |
137 | #endif |
138 | #endif |