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 extern void proc_root_init(void); 18 extern void proc_flush_task(struct task_struct *); 19 20 extern struct proc_dir_entry *proc_symlink(const char *, 21 struct proc_dir_entry *, const char *); 22 extern struct proc_dir_entry *proc_mkdir(const char *, struct proc_dir_entry *); 23 extern struct proc_dir_entry *proc_mkdir_data(const char *, umode_t, 24 struct proc_dir_entry *, void *); 25 extern struct proc_dir_entry *proc_mkdir_mode(const char *, umode_t, 26 struct proc_dir_entry *); 27 struct proc_dir_entry *proc_create_mount_point(const char *name); 28 29 struct proc_dir_entry *proc_create_seq_private(const char *name, umode_t mode, 30 struct proc_dir_entry *parent, const struct seq_operations *ops, 31 unsigned int state_size, void *data); 32 #define proc_create_seq_data(name, mode, parent, ops, data) \ 33 proc_create_seq_private(name, mode, parent, ops, 0, data) 34 #define proc_create_seq(name, mode, parent, ops) \ 35 proc_create_seq_private(name, mode, parent, ops, 0, NULL) 36 struct proc_dir_entry *proc_create_single_data(const char *name, umode_t mode, 37 struct proc_dir_entry *parent, 38 int (*show)(struct seq_file *, void *), void *data); 39 #define proc_create_single(name, mode, parent, show) \ 40 proc_create_single_data(name, mode, parent, show, NULL) 41 42 extern struct proc_dir_entry *proc_create_data(const char *, umode_t, 43 struct proc_dir_entry *, 44 const struct file_operations *, 45 void *); 46 47 struct proc_dir_entry *proc_create(const char *name, umode_t mode, struct proc_dir_entry *parent, const struct file_operations *proc_fops); 48 extern void proc_set_size(struct proc_dir_entry *, loff_t); 49 extern void proc_set_user(struct proc_dir_entry *, kuid_t, kgid_t); 50 extern void *PDE_DATA(const struct inode *); 51 extern void *proc_get_parent_data(const struct inode *); 52 extern void proc_remove(struct proc_dir_entry *); 53 extern void remove_proc_entry(const char *, struct proc_dir_entry *); 54 extern int remove_proc_subtree(const char *, struct proc_dir_entry *); 55 56 struct proc_dir_entry *proc_create_net_data(const char *name, umode_t mode, 57 struct proc_dir_entry *parent, const struct seq_operations *ops, 58 unsigned int state_size, void *data); 59 #define proc_create_net(name, mode, parent, state_size, ops) \ 60 proc_create_net_data(name, mode, parent, state_size, ops, NULL) 61 struct proc_dir_entry *proc_create_net_single(const char *name, umode_t mode, 62 struct proc_dir_entry *parent, 63 int (*show)(struct seq_file *, void *), void *data); 64 65 #else /* CONFIG_PROC_FS */ 66 67 static inline void proc_root_init(void) 68 { 69 } 70 71 static inline void proc_flush_task(struct task_struct *task) 72 { 73 } 74 75 static inline struct proc_dir_entry *proc_symlink(const char *name, 76 struct proc_dir_entry *parent,const char *dest) { return NULL;} 77 static inline struct proc_dir_entry *proc_mkdir(const char *name, 78 struct proc_dir_entry *parent) {return NULL;} 79 static inline struct proc_dir_entry *proc_create_mount_point(const char *name) { return NULL; } 80 static inline struct proc_dir_entry *proc_mkdir_data(const char *name, 81 umode_t mode, struct proc_dir_entry *parent, void *data) { return NULL; } 82 static inline struct proc_dir_entry *proc_mkdir_mode(const char *name, 83 umode_t mode, struct proc_dir_entry *parent) { return NULL; } 84 #define proc_create_seq_private(name, mode, parent, ops, size, data) ({NULL;}) 85 #define proc_create_seq_data(name, mode, parent, ops, data) ({NULL;}) 86 #define proc_create_seq(name, mode, parent, ops) ({NULL;}) 87 #define proc_create_single(name, mode, parent, show) ({NULL;}) 88 #define proc_create_single_data(name, mode, parent, show, data) ({NULL;}) 89 #define proc_create(name, mode, parent, proc_fops) ({NULL;}) 90 #define proc_create_data(name, mode, parent, proc_fops, data) ({NULL;}) 91 92 static inline void proc_set_size(struct proc_dir_entry *de, loff_t size) {} 93 static inline void proc_set_user(struct proc_dir_entry *de, kuid_t uid, kgid_t gid) {} 94 static inline void *PDE_DATA(const struct inode *inode) {BUG(); return NULL;} 95 static inline void *proc_get_parent_data(const struct inode *inode) { BUG(); return NULL; } 96 97 static inline void proc_remove(struct proc_dir_entry *de) {} 98 #define remove_proc_entry(name, parent) do {} while (0) 99 static inline int remove_proc_subtree(const char *name, struct proc_dir_entry *parent) { return 0; } 100 101 #define proc_create_net_data(name, mode, parent, ops, state_size, data) ({NULL;}) 102 #define proc_create_net(name, mode, parent, state_size, ops) ({NULL;}) 103 #define proc_create_net_single(name, mode, parent, show, data) ({NULL;}) 104 105 #endif /* CONFIG_PROC_FS */ 106 107 struct net; 108 109 static inline struct proc_dir_entry *proc_net_mkdir( 110 struct net *net, const char *name, struct proc_dir_entry *parent) 111 { 112 return proc_mkdir_data(name, 0, parent, net); 113 } 114 115 struct ns_common; 116 int open_related_ns(struct ns_common *ns, 117 struct ns_common *(*get_ns)(struct ns_common *ns)); 118 119 /* get the associated pid namespace for a file in procfs */ 120 static inline struct pid_namespace *proc_pid_ns(struct inode *inode) 121 { 122 return inode->i_sb->s_fs_info; 123 } 124 125 #endif /* _LINUX_PROC_FS_H */ 126