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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | * The proc filesystem constants/structures | |
4 | */ | |
59d8053f DH |
5 | #ifndef _LINUX_PROC_FS_H |
6 | #define _LINUX_PROC_FS_H | |
1da177e4 | 7 | |
d919b33d | 8 | #include <linux/compiler.h> |
59d8053f DH |
9 | #include <linux/types.h> |
10 | #include <linux/fs.h> | |
1da177e4 | 11 | |
59d8053f | 12 | struct proc_dir_entry; |
3f3942ac | 13 | struct seq_file; |
fddda2b7 | 14 | struct seq_operations; |
1da177e4 | 15 | |
d919b33d AD |
16 | enum { |
17 | /* | |
18 | * All /proc entries using this ->proc_ops instance are never removed. | |
19 | * | |
20 | * If in doubt, ignore this flag. | |
21 | */ | |
22 | #ifdef MODULE | |
23 | PROC_ENTRY_PERMANENT = 0U, | |
24 | #else | |
25 | PROC_ENTRY_PERMANENT = 1U << 0, | |
26 | #endif | |
27 | }; | |
28 | ||
d56c0d45 | 29 | struct proc_ops { |
d919b33d | 30 | unsigned int proc_flags; |
d56c0d45 AD |
31 | int (*proc_open)(struct inode *, struct file *); |
32 | ssize_t (*proc_read)(struct file *, char __user *, size_t, loff_t *); | |
fd5a13f4 | 33 | ssize_t (*proc_read_iter)(struct kiocb *, struct iov_iter *); |
d56c0d45 AD |
34 | ssize_t (*proc_write)(struct file *, const char __user *, size_t, loff_t *); |
35 | loff_t (*proc_lseek)(struct file *, loff_t, int); | |
36 | int (*proc_release)(struct inode *, struct file *); | |
37 | __poll_t (*proc_poll)(struct file *, struct poll_table_struct *); | |
38 | long (*proc_ioctl)(struct file *, unsigned int, unsigned long); | |
39 | #ifdef CONFIG_COMPAT | |
40 | long (*proc_compat_ioctl)(struct file *, unsigned int, unsigned long); | |
41 | #endif | |
42 | int (*proc_mmap)(struct file *, struct vm_area_struct *); | |
43 | unsigned long (*proc_get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long); | |
d919b33d | 44 | } __randomize_layout; |
d56c0d45 | 45 | |
fa10fed3 | 46 | /* definitions for hide_pid field */ |
e61bb8b3 | 47 | enum proc_hidepid { |
fa10fed3 AG |
48 | HIDEPID_OFF = 0, |
49 | HIDEPID_NO_ACCESS = 1, | |
50 | HIDEPID_INVISIBLE = 2, | |
24a71ce5 | 51 | HIDEPID_NOT_PTRACEABLE = 4, /* Limit pids to only ptraceable pids */ |
fa10fed3 AG |
52 | }; |
53 | ||
6814ef2d | 54 | /* definitions for proc mount option pidonly */ |
e61bb8b3 | 55 | enum proc_pidonly { |
6814ef2d AG |
56 | PROC_PIDONLY_OFF = 0, |
57 | PROC_PIDONLY_ON = 1, | |
58 | }; | |
59 | ||
fa10fed3 AG |
60 | struct proc_fs_info { |
61 | struct pid_namespace *pid_ns; | |
62 | struct dentry *proc_self; /* For /proc/self */ | |
63 | struct dentry *proc_thread_self; /* For /proc/thread-self */ | |
64 | kgid_t pid_gid; | |
e61bb8b3 AG |
65 | enum proc_hidepid hide_pid; |
66 | enum proc_pidonly pidonly; | |
fa10fed3 AG |
67 | }; |
68 | ||
69 | static inline struct proc_fs_info *proc_sb_info(struct super_block *sb) | |
70 | { | |
71 | return sb->s_fs_info; | |
72 | } | |
73 | ||
1da177e4 LT |
74 | #ifdef CONFIG_PROC_FS |
75 | ||
564def71 DH |
76 | typedef int (*proc_write_t)(struct file *, char *, size_t); |
77 | ||
1da177e4 | 78 | extern void proc_root_init(void); |
7bc3e6e5 | 79 | extern void proc_flush_pid(struct pid *); |
1da177e4 | 80 | |
1da177e4 LT |
81 | extern struct proc_dir_entry *proc_symlink(const char *, |
82 | struct proc_dir_entry *, const char *); | |
c6c75ded | 83 | struct proc_dir_entry *_proc_mkdir(const char *, umode_t, struct proc_dir_entry *, void *, bool); |
59d8053f | 84 | extern struct proc_dir_entry *proc_mkdir(const char *, struct proc_dir_entry *); |
270b5ac2 DH |
85 | extern struct proc_dir_entry *proc_mkdir_data(const char *, umode_t, |
86 | struct proc_dir_entry *, void *); | |
59d8053f DH |
87 | extern struct proc_dir_entry *proc_mkdir_mode(const char *, umode_t, |
88 | struct proc_dir_entry *); | |
f97df70b | 89 | struct proc_dir_entry *proc_create_mount_point(const char *name); |
fddda2b7 | 90 | |
44414d82 | 91 | struct proc_dir_entry *proc_create_seq_private(const char *name, umode_t mode, |
fddda2b7 | 92 | struct proc_dir_entry *parent, const struct seq_operations *ops, |
44414d82 CH |
93 | unsigned int state_size, void *data); |
94 | #define proc_create_seq_data(name, mode, parent, ops, data) \ | |
95 | proc_create_seq_private(name, mode, parent, ops, 0, data) | |
fddda2b7 | 96 | #define proc_create_seq(name, mode, parent, ops) \ |
44414d82 | 97 | proc_create_seq_private(name, mode, parent, ops, 0, NULL) |
3f3942ac CH |
98 | struct proc_dir_entry *proc_create_single_data(const char *name, umode_t mode, |
99 | struct proc_dir_entry *parent, | |
100 | int (*show)(struct seq_file *, void *), void *data); | |
101 | #define proc_create_single(name, mode, parent, show) \ | |
102 | proc_create_single_data(name, mode, parent, show, NULL) | |
59d8053f DH |
103 | |
104 | extern struct proc_dir_entry *proc_create_data(const char *, umode_t, | |
105 | struct proc_dir_entry *, | |
d56c0d45 | 106 | const struct proc_ops *, |
59d8053f DH |
107 | void *); |
108 | ||
d56c0d45 | 109 | struct proc_dir_entry *proc_create(const char *name, umode_t mode, struct proc_dir_entry *parent, const struct proc_ops *proc_ops); |
271a15ea DH |
110 | extern void proc_set_size(struct proc_dir_entry *, loff_t); |
111 | extern void proc_set_user(struct proc_dir_entry *, kuid_t, kgid_t); | |
c30480b9 | 112 | extern void *PDE_DATA(const struct inode *); |
4a520d27 | 113 | extern void *proc_get_parent_data(const struct inode *); |
59d8053f DH |
114 | extern void proc_remove(struct proc_dir_entry *); |
115 | extern void remove_proc_entry(const char *, struct proc_dir_entry *); | |
116 | extern int remove_proc_subtree(const char *, struct proc_dir_entry *); | |
117 | ||
c3506372 CH |
118 | struct proc_dir_entry *proc_create_net_data(const char *name, umode_t mode, |
119 | struct proc_dir_entry *parent, const struct seq_operations *ops, | |
120 | unsigned int state_size, void *data); | |
9573e8f7 ML |
121 | #define proc_create_net(name, mode, parent, ops, state_size) \ |
122 | proc_create_net_data(name, mode, parent, ops, state_size, NULL) | |
3617d949 CH |
123 | struct proc_dir_entry *proc_create_net_single(const char *name, umode_t mode, |
124 | struct proc_dir_entry *parent, | |
125 | int (*show)(struct seq_file *, void *), void *data); | |
564def71 DH |
126 | struct proc_dir_entry *proc_create_net_data_write(const char *name, umode_t mode, |
127 | struct proc_dir_entry *parent, | |
128 | const struct seq_operations *ops, | |
129 | proc_write_t write, | |
130 | unsigned int state_size, void *data); | |
131 | struct proc_dir_entry *proc_create_net_single_write(const char *name, umode_t mode, | |
132 | struct proc_dir_entry *parent, | |
133 | int (*show)(struct seq_file *, void *), | |
134 | proc_write_t write, | |
135 | void *data); | |
3eb39f47 | 136 | extern struct pid *tgid_pidfd_to_pid(const struct file *file); |
c3506372 | 137 | |
f9c79272 YS |
138 | struct bpf_iter_aux_info; |
139 | extern int bpf_iter_init_seq_net(void *priv_data, struct bpf_iter_aux_info *aux); | |
138d0be3 YS |
140 | extern void bpf_iter_fini_seq_net(void *priv_data); |
141 | ||
68bc30bb AL |
142 | #ifdef CONFIG_PROC_PID_ARCH_STATUS |
143 | /* | |
144 | * The architecture which selects CONFIG_PROC_PID_ARCH_STATUS must | |
145 | * provide proc_pid_arch_status() definition. | |
146 | */ | |
147 | int proc_pid_arch_status(struct seq_file *m, struct pid_namespace *ns, | |
148 | struct pid *pid, struct task_struct *task); | |
149 | #endif /* CONFIG_PROC_PID_ARCH_STATUS */ | |
150 | ||
59d8053f | 151 | #else /* CONFIG_PROC_FS */ |
1da177e4 | 152 | |
647f010b AM |
153 | static inline void proc_root_init(void) |
154 | { | |
155 | } | |
156 | ||
7bc3e6e5 | 157 | static inline void proc_flush_pid(struct pid *pid) |
60347f67 PE |
158 | { |
159 | } | |
1da177e4 | 160 | |
1da177e4 | 161 | static inline struct proc_dir_entry *proc_symlink(const char *name, |
59d8053f | 162 | struct proc_dir_entry *parent,const char *dest) { return NULL;} |
1da177e4 LT |
163 | static inline struct proc_dir_entry *proc_mkdir(const char *name, |
164 | struct proc_dir_entry *parent) {return NULL;} | |
f97df70b | 165 | static inline struct proc_dir_entry *proc_create_mount_point(const char *name) { return NULL; } |
c6c75ded AD |
166 | static inline struct proc_dir_entry *_proc_mkdir(const char *name, umode_t mode, |
167 | struct proc_dir_entry *parent, void *data, bool force_lookup) | |
168 | { | |
169 | return NULL; | |
170 | } | |
270b5ac2 DH |
171 | static inline struct proc_dir_entry *proc_mkdir_data(const char *name, |
172 | umode_t mode, struct proc_dir_entry *parent, void *data) { return NULL; } | |
f12a20fc | 173 | static inline struct proc_dir_entry *proc_mkdir_mode(const char *name, |
d161a13f | 174 | umode_t mode, struct proc_dir_entry *parent) { return NULL; } |
3f3942ac | 175 | #define proc_create_seq_private(name, mode, parent, ops, size, data) ({NULL;}) |
fddda2b7 CH |
176 | #define proc_create_seq_data(name, mode, parent, ops, data) ({NULL;}) |
177 | #define proc_create_seq(name, mode, parent, ops) ({NULL;}) | |
3f3942ac CH |
178 | #define proc_create_single(name, mode, parent, show) ({NULL;}) |
179 | #define proc_create_single_data(name, mode, parent, show, data) ({NULL;}) | |
d56c0d45 AD |
180 | #define proc_create(name, mode, parent, proc_ops) ({NULL;}) |
181 | #define proc_create_data(name, mode, parent, proc_ops, data) ({NULL;}) | |
59d8053f | 182 | |
271a15ea DH |
183 | static inline void proc_set_size(struct proc_dir_entry *de, loff_t size) {} |
184 | static inline void proc_set_user(struct proc_dir_entry *de, kuid_t uid, kgid_t gid) {} | |
c30480b9 | 185 | static inline void *PDE_DATA(const struct inode *inode) {BUG(); return NULL;} |
59d8053f | 186 | static inline void *proc_get_parent_data(const struct inode *inode) { BUG(); return NULL; } |
1da177e4 | 187 | |
59d8053f DH |
188 | static inline void proc_remove(struct proc_dir_entry *de) {} |
189 | #define remove_proc_entry(name, parent) do {} while (0) | |
190 | static inline int remove_proc_subtree(const char *name, struct proc_dir_entry *parent) { return 0; } | |
9043476f | 191 | |
c3506372 CH |
192 | #define proc_create_net_data(name, mode, parent, ops, state_size, data) ({NULL;}) |
193 | #define proc_create_net(name, mode, parent, state_size, ops) ({NULL;}) | |
3617d949 | 194 | #define proc_create_net_single(name, mode, parent, show, data) ({NULL;}) |
c3506372 | 195 | |
3eb39f47 CB |
196 | static inline struct pid *tgid_pidfd_to_pid(const struct file *file) |
197 | { | |
198 | return ERR_PTR(-EBADF); | |
199 | } | |
200 | ||
59d8053f | 201 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 202 | |
f7790029 JL |
203 | struct net; |
204 | ||
270b5ac2 DH |
205 | static inline struct proc_dir_entry *proc_net_mkdir( |
206 | struct net *net, const char *name, struct proc_dir_entry *parent) | |
207 | { | |
c6c75ded | 208 | return _proc_mkdir(name, 0, parent, net, true); |
270b5ac2 DH |
209 | } |
210 | ||
c62cce2c AV |
211 | struct ns_common; |
212 | int open_related_ns(struct ns_common *ns, | |
213 | struct ns_common *(*get_ns)(struct ns_common *ns)); | |
214 | ||
76f668be | 215 | /* get the associated pid namespace for a file in procfs */ |
9d78edea | 216 | static inline struct pid_namespace *proc_pid_ns(struct super_block *sb) |
76f668be | 217 | { |
9d78edea | 218 | return proc_sb_info(sb)->pid_ns; |
76f668be CH |
219 | } |
220 | ||
303cc571 CB |
221 | bool proc_ns_file(const struct file *file); |
222 | ||
1da177e4 | 223 | #endif /* _LINUX_PROC_FS_H */ |