| #ifndef _LINUX_PROC_FS_H |
| #define _LINUX_PROC_FS_H |
| |
| #include <linux/slab.h> |
| #include <linux/fs.h> |
| #include <linux/spinlock.h> |
| #include <linux/magic.h> |
| #include <linux/atomic.h> |
| #include <linux/proc_ns.h> |
| |
| struct net; |
| struct completion; |
| struct mm_struct; |
| |
| /* |
| * The proc filesystem constants/structures |
| */ |
| |
| /* |
| * Offset of the first process in the /proc root directory.. |
| */ |
| #define FIRST_PROCESS_ENTRY 256 |
| |
| /* Worst case buffer size needed for holding an integer. */ |
| #define PROC_NUMBUF 13 |
| |
| /* |
| * This is not completely implemented yet. The idea is to |
| * create an in-memory tree (like the actual /proc filesystem |
| * tree) of these proc_dir_entries, so that we can dynamically |
| * add new files to /proc. |
| * |
| * The "next" pointer creates a linked list of one /proc directory, |
| * while parent/subdir create the directory structure (every |
| * /proc file has a parent, but "subdir" is NULL for all |
| * non-directory entries). |
| */ |
| |
| struct proc_dir_entry { |
| unsigned int low_ino; |
| umode_t mode; |
| nlink_t nlink; |
| kuid_t uid; |
| kgid_t gid; |
| loff_t size; |
| const struct inode_operations *proc_iops; |
| const struct file_operations *proc_fops; |
| struct proc_dir_entry *next, *parent, *subdir; |
| void *data; |
| atomic_t count; /* use count */ |
| atomic_t in_use; /* number of callers into module in progress; */ |
| /* negative -> it's going away RSN */ |
| struct completion *pde_unload_completion; |
| struct list_head pde_openers; /* who did ->open, but not ->release */ |
| spinlock_t pde_unload_lock; /* proc_fops checks and pde_users bumps */ |
| u8 namelen; |
| char name[]; |
| }; |
| |
| #ifdef CONFIG_PROC_FS |
| |
| extern void proc_root_init(void); |
| |
| void proc_flush_task(struct task_struct *task); |
| |
| struct proc_dir_entry *proc_create_data(const char *name, umode_t mode, |
| struct proc_dir_entry *parent, |
| const struct file_operations *proc_fops, |
| void *data); |
| extern void proc_remove(struct proc_dir_entry *); |
| extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent); |
| extern int remove_proc_subtree(const char *name, struct proc_dir_entry *parent); |
| |
| extern struct proc_dir_entry *proc_symlink(const char *, |
| struct proc_dir_entry *, const char *); |
| extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *); |
| extern struct proc_dir_entry *proc_mkdir_data(const char *, umode_t, |
| struct proc_dir_entry *, void *); |
| extern struct proc_dir_entry *proc_mkdir_mode(const char *name, umode_t mode, |
| struct proc_dir_entry *parent); |
| |
| static inline struct proc_dir_entry *proc_create(const char *name, umode_t mode, |
| struct proc_dir_entry *parent, const struct file_operations *proc_fops) |
| { |
| return proc_create_data(name, mode, parent, proc_fops, NULL); |
| } |
| |
| extern void proc_set_size(struct proc_dir_entry *, loff_t); |
| extern void proc_set_user(struct proc_dir_entry *, kuid_t, kgid_t); |
| extern void *proc_get_parent_data(const struct inode *); |
| #else |
| |
| static inline void proc_flush_task(struct task_struct *task) |
| { |
| } |
| |
| #define proc_create(name, mode, parent, fops) ({ (void)(mode), NULL; }) |
| |
| static inline struct proc_dir_entry *proc_create_data(const char *name, |
| umode_t mode, struct proc_dir_entry *parent, |
| const struct file_operations *proc_fops, void *data) |
| { |
| return NULL; |
| } |
| static inline void proc_remove(struct proc_dir_entry *de) {} |
| #define remove_proc_entry(name, parent) do {} while (0) |
| #define remove_proc_subtree(name, parent) do {} while (0) |
| |
| static inline struct proc_dir_entry *proc_symlink(const char *name, |
| struct proc_dir_entry *parent,const char *dest) {return NULL;} |
| static inline struct proc_dir_entry *proc_mkdir(const char *name, |
| struct proc_dir_entry *parent) {return NULL;} |
| static inline struct proc_dir_entry *proc_mkdir_data(const char *name, |
| umode_t mode, struct proc_dir_entry *parent, void *data) { return NULL; } |
| static inline struct proc_dir_entry *proc_mkdir_mode(const char *name, |
| umode_t mode, struct proc_dir_entry *parent) { return NULL; } |
| static inline void proc_set_size(struct proc_dir_entry *de, loff_t size) {} |
| static inline void proc_set_user(struct proc_dir_entry *de, kuid_t uid, kgid_t gid) {} |
| |
| #endif /* CONFIG_PROC_FS */ |
| |
| |
| union proc_op { |
| int (*proc_get_link)(struct dentry *, struct path *); |
| int (*proc_read)(struct task_struct *task, char *page); |
| int (*proc_show)(struct seq_file *m, |
| struct pid_namespace *ns, struct pid *pid, |
| struct task_struct *task); |
| }; |
| |
| struct ctl_table_header; |
| struct ctl_table; |
| |
| struct proc_inode { |
| struct pid *pid; |
| int fd; |
| union proc_op op; |
| struct proc_dir_entry *pde; |
| struct ctl_table_header *sysctl; |
| struct ctl_table *sysctl_entry; |
| struct proc_ns ns; |
| struct inode vfs_inode; |
| }; |
| |
| static inline struct proc_inode *PROC_I(const struct inode *inode) |
| { |
| return container_of(inode, struct proc_inode, vfs_inode); |
| } |
| |
| static inline struct proc_dir_entry *PDE(const struct inode *inode) |
| { |
| return PROC_I(inode)->pde; |
| } |
| |
| static inline void *PDE_DATA(const struct inode *inode) |
| { |
| return PROC_I(inode)->pde->data; |
| } |
| |
| static inline struct proc_dir_entry *proc_net_mkdir( |
| struct net *net, const char *name, struct proc_dir_entry *parent) |
| { |
| return proc_mkdir_data(name, 0, parent, net); |
| } |
| |
| #endif /* _LINUX_PROC_FS_H */ |