1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * The proc filesystem constants/structures |
4 | */ |
5 | #ifndef _LINUX_PROC_FS_H |
6 | #define _LINUX_PROC_FS_H |
7 | |
8 | #include <linux/types.h> |
9 | #include <linux/fs.h> |
10 | |
11 | struct proc_dir_entry; |
12 | struct seq_file; |
13 | struct seq_operations; |
14 | |
15 | #ifdef CONFIG_PROC_FS |
16 | |
17 | typedef int (*proc_write_t)(struct file *, char *, size_t); |
18 | |
19 | extern void proc_root_init(void); |
20 | extern void proc_flush_task(struct task_struct *); |
21 | |
22 | extern struct proc_dir_entry *proc_symlink(const char *, |
23 | struct proc_dir_entry *, const char *); |
24 | extern struct proc_dir_entry *proc_mkdir(const char *, struct proc_dir_entry *); |
25 | extern struct proc_dir_entry *proc_mkdir_data(const char *, umode_t, |
26 | struct proc_dir_entry *, void *); |
27 | extern struct proc_dir_entry *proc_mkdir_mode(const char *, umode_t, |
28 | struct proc_dir_entry *); |
29 | struct proc_dir_entry *proc_create_mount_point(const char *name); |
30 | |
31 | struct proc_dir_entry *proc_create_seq_private(const char *name, umode_t mode, |
32 | struct proc_dir_entry *parent, const struct seq_operations *ops, |
33 | unsigned int state_size, void *data); |
34 | #define proc_create_seq_data(name, mode, parent, ops, data) \ |
35 | proc_create_seq_private(name, mode, parent, ops, 0, data) |
36 | #define proc_create_seq(name, mode, parent, ops) \ |
37 | proc_create_seq_private(name, mode, parent, ops, 0, NULL) |
38 | struct proc_dir_entry *proc_create_single_data(const char *name, umode_t mode, |
39 | struct proc_dir_entry *parent, |
40 | int (*show)(struct seq_file *, void *), void *data); |
41 | #define proc_create_single(name, mode, parent, show) \ |
42 | proc_create_single_data(name, mode, parent, show, NULL) |
43 | |
44 | extern struct proc_dir_entry *proc_create_data(const char *, umode_t, |
45 | struct proc_dir_entry *, |
46 | const struct file_operations *, |
47 | void *); |
48 | |
49 | struct proc_dir_entry *proc_create(const char *name, umode_t mode, struct proc_dir_entry *parent, const struct file_operations *proc_fops); |
50 | extern void proc_set_size(struct proc_dir_entry *, loff_t); |
51 | extern void proc_set_user(struct proc_dir_entry *, kuid_t, kgid_t); |
52 | extern void *PDE_DATA(const struct inode *); |
53 | extern void *proc_get_parent_data(const struct inode *); |
54 | extern void proc_remove(struct proc_dir_entry *); |
55 | extern void remove_proc_entry(const char *, struct proc_dir_entry *); |
56 | extern int remove_proc_subtree(const char *, struct proc_dir_entry *); |
57 | |
58 | struct proc_dir_entry *proc_create_net_data(const char *name, umode_t mode, |
59 | struct proc_dir_entry *parent, const struct seq_operations *ops, |
60 | unsigned int state_size, void *data); |
61 | #define proc_create_net(name, mode, parent, state_size, ops) \ |
62 | proc_create_net_data(name, mode, parent, state_size, ops, NULL) |
63 | struct proc_dir_entry *proc_create_net_single(const char *name, umode_t mode, |
64 | struct proc_dir_entry *parent, |
65 | int (*show)(struct seq_file *, void *), void *data); |
66 | struct proc_dir_entry *proc_create_net_data_write(const char *name, umode_t mode, |
67 | struct proc_dir_entry *parent, |
68 | const struct seq_operations *ops, |
69 | proc_write_t write, |
70 | unsigned int state_size, void *data); |
71 | struct proc_dir_entry *proc_create_net_single_write(const char *name, umode_t mode, |
72 | struct proc_dir_entry *parent, |
73 | int (*show)(struct seq_file *, void *), |
74 | proc_write_t write, |
75 | void *data); |
76 | extern struct pid *tgid_pidfd_to_pid(const struct file *file); |
77 | |
78 | #else /* CONFIG_PROC_FS */ |
79 | |
80 | static inline void proc_root_init(void) |
81 | { |
82 | } |
83 | |
84 | static inline void proc_flush_task(struct task_struct *task) |
85 | { |
86 | } |
87 | |
88 | static inline struct proc_dir_entry *proc_symlink(const char *name, |
89 | struct proc_dir_entry *parent,const char *dest) { return NULL;} |
90 | static inline struct proc_dir_entry *proc_mkdir(const char *name, |
91 | struct proc_dir_entry *parent) {return NULL;} |
92 | static inline struct proc_dir_entry *proc_create_mount_point(const char *name) { return NULL; } |
93 | static inline struct proc_dir_entry *proc_mkdir_data(const char *name, |
94 | umode_t mode, struct proc_dir_entry *parent, void *data) { return NULL; } |
95 | static inline struct proc_dir_entry *proc_mkdir_mode(const char *name, |
96 | umode_t mode, struct proc_dir_entry *parent) { return NULL; } |
97 | #define proc_create_seq_private(name, mode, parent, ops, size, data) ({NULL;}) |
98 | #define proc_create_seq_data(name, mode, parent, ops, data) ({NULL;}) |
99 | #define proc_create_seq(name, mode, parent, ops) ({NULL;}) |
100 | #define proc_create_single(name, mode, parent, show) ({NULL;}) |
101 | #define proc_create_single_data(name, mode, parent, show, data) ({NULL;}) |
102 | #define proc_create(name, mode, parent, proc_fops) ({NULL;}) |
103 | #define proc_create_data(name, mode, parent, proc_fops, data) ({NULL;}) |
104 | |
105 | static inline void proc_set_size(struct proc_dir_entry *de, loff_t size) {} |
106 | static inline void proc_set_user(struct proc_dir_entry *de, kuid_t uid, kgid_t gid) {} |
107 | static inline void *PDE_DATA(const struct inode *inode) {BUG(); return NULL;} |
108 | static inline void *proc_get_parent_data(const struct inode *inode) { BUG(); return NULL; } |
109 | |
110 | static inline void proc_remove(struct proc_dir_entry *de) {} |
111 | #define remove_proc_entry(name, parent) do {} while (0) |
112 | static inline int remove_proc_subtree(const char *name, struct proc_dir_entry *parent) { return 0; } |
113 | |
114 | #define proc_create_net_data(name, mode, parent, ops, state_size, data) ({NULL;}) |
115 | #define proc_create_net(name, mode, parent, state_size, ops) ({NULL;}) |
116 | #define proc_create_net_single(name, mode, parent, show, data) ({NULL;}) |
117 | |
118 | static inline struct pid *tgid_pidfd_to_pid(const struct file *file) |
119 | { |
120 | return ERR_PTR(-EBADF); |
121 | } |
122 | |
123 | #endif /* CONFIG_PROC_FS */ |
124 | |
125 | struct net; |
126 | |
127 | static inline struct proc_dir_entry *proc_net_mkdir( |
128 | struct net *net, const char *name, struct proc_dir_entry *parent) |
129 | { |
130 | return proc_mkdir_data(name, 0, parent, net); |
131 | } |
132 | |
133 | struct ns_common; |
134 | int open_related_ns(struct ns_common *ns, |
135 | struct ns_common *(*get_ns)(struct ns_common *ns)); |
136 | |
137 | /* get the associated pid namespace for a file in procfs */ |
138 | static inline struct pid_namespace *proc_pid_ns(const struct inode *inode) |
139 | { |
140 | return inode->i_sb->s_fs_info; |
141 | } |
142 | |
143 | #endif /* _LINUX_PROC_FS_H */ |
144 | |