--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/linux/proc_fs.h	Sun Jan 11 20:20:11 2009 +0100
@@ -0,0 +1,315 @@
+#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 <asm/atomic.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
+
+/*
+ * We always define these enumerators
+ */
+
+enum {
+	PROC_ROOT_INO = 1,
+};
+
+/*
+ * 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).
+ *
+ * "owner" is used to protect module
+ * from unloading while proc_dir_entry is in use
+ */
+
+typedef	int (read_proc_t)(char *page, char **start, off_t off,
+			  int count, int *eof, void *data);
+typedef	int (write_proc_t)(struct file *file, const char __user *buffer,
+			   unsigned long count, void *data);
+
+struct proc_dir_entry {
+	unsigned int low_ino;
+	unsigned short namelen;
+	const char *name;
+	mode_t mode;
+	nlink_t nlink;
+	uid_t uid;
+	gid_t gid;
+	loff_t size;
+	const struct inode_operations *proc_iops;
+	/*
+	 * NULL ->proc_fops means "PDE is going away RSN" or
+	 * "PDE is just created". In either case, e.g. ->read_proc won't be
+	 * called because it's too late or too early, respectively.
+	 *
+	 * If you're allocating ->proc_fops dynamically, save a pointer
+	 * somewhere.
+	 */
+	const struct file_operations *proc_fops;
+	struct module *owner;
+	struct proc_dir_entry *next, *parent, *subdir;
+	void *data;
+	read_proc_t *read_proc;
+	write_proc_t *write_proc;
+	atomic_t count;		/* use count */
+	int pde_users;	/* number of callers into module in progress */
+	spinlock_t pde_unload_lock; /* proc_fops checks and pde_users bumps */
+	struct completion *pde_unload_completion;
+	struct list_head pde_openers;	/* who did ->open, but not ->release */
+};
+
+struct kcore_list {
+	struct kcore_list *next;
+	unsigned long addr;
+	size_t size;
+};
+
+struct vmcore {
+	struct list_head list;
+	unsigned long long paddr;
+	unsigned long long size;
+	loff_t offset;
+};
+
+#ifdef CONFIG_PROC_FS
+
+extern spinlock_t proc_subdir_lock;
+
+extern void proc_root_init(void);
+
+void proc_flush_task(struct task_struct *task);
+struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
+int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
+unsigned long task_vsize(struct mm_struct *);
+int task_statm(struct mm_struct *, int *, int *, int *, int *);
+void task_mem(struct seq_file *, struct mm_struct *);
+void clear_refs_smap(struct mm_struct *mm);
+
+struct proc_dir_entry *de_get(struct proc_dir_entry *de);
+void de_put(struct proc_dir_entry *de);
+
+extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
+						struct proc_dir_entry *parent);
+struct proc_dir_entry *proc_create_data(const char *name, mode_t mode,
+				struct proc_dir_entry *parent,
+				const struct file_operations *proc_fops,
+				void *data);
+extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
+
+extern struct vfsmount *proc_mnt;
+struct pid_namespace;
+extern int proc_fill_super(struct super_block *);
+extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
+
+/*
+ * These are generic /proc routines that use the internal
+ * "struct proc_dir_entry" tree to traverse the filesystem.
+ *
+ * The /proc root directory has extended versions to take care
+ * of the /proc/<pid> subdirectories.
+ */
+extern int proc_readdir(struct file *, void *, filldir_t);
+extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
+
+extern int pid_ns_prepare_proc(struct pid_namespace *ns);
+extern void pid_ns_release_proc(struct pid_namespace *ns);
+
+/*
+ * proc_tty.c
+ */
+struct tty_driver;
+extern void proc_tty_init(void);
+extern void proc_tty_register_driver(struct tty_driver *driver);
+extern void proc_tty_unregister_driver(struct tty_driver *driver);
+
+/*
+ * proc_devtree.c
+ */
+#ifdef CONFIG_PROC_DEVICETREE
+struct device_node;
+struct property;
+extern void proc_device_tree_init(void);
+extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
+extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop);
+extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde,
+					 struct property *prop);
+extern void proc_device_tree_update_prop(struct proc_dir_entry *pde,
+					 struct property *newprop,
+					 struct property *oldprop);
+#endif /* CONFIG_PROC_DEVICETREE */
+
+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_mode(const char *name, mode_t mode,
+			struct proc_dir_entry *parent);
+
+static inline struct proc_dir_entry *proc_create(const char *name, mode_t mode,
+	struct proc_dir_entry *parent, const struct file_operations *proc_fops)
+{
+	return proc_create_data(name, mode, parent, proc_fops, NULL);
+}
+
+static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
+	mode_t mode, struct proc_dir_entry *base, 
+	read_proc_t *read_proc, void * data)
+{
+	struct proc_dir_entry *res=create_proc_entry(name,mode,base);
+	if (res) {
+		res->read_proc=read_proc;
+		res->data=data;
+	}
+	return res;
+}
+ 
+extern struct proc_dir_entry *proc_net_fops_create(struct net *net,
+	const char *name, mode_t mode, const struct file_operations *fops);
+extern void proc_net_remove(struct net *net, const char *name);
+extern struct proc_dir_entry *proc_net_mkdir(struct net *net, const char *name,
+	struct proc_dir_entry *parent);
+
+/* While the {get|set|dup}_mm_exe_file functions are for mm_structs, they are
+ * only needed to implement /proc/<pid>|self/exe so we define them here. */
+extern void set_mm_exe_file(struct mm_struct *mm, struct file *new_exe_file);
+extern struct file *get_mm_exe_file(struct mm_struct *mm);
+extern void dup_mm_exe_file(struct mm_struct *oldmm, struct mm_struct *newmm);
+
+#else
+
+#define proc_net_fops_create(net, name, mode, fops)  ({ (void)(mode), NULL; })
+static inline void proc_net_remove(struct net *net, const char *name) {}
+
+static inline void proc_flush_task(struct task_struct *task)
+{
+}
+
+static inline struct proc_dir_entry *create_proc_entry(const char *name,
+	mode_t mode, struct proc_dir_entry *parent) { return NULL; }
+static inline struct proc_dir_entry *proc_create(const char *name,
+	mode_t mode, struct proc_dir_entry *parent,
+	const struct file_operations *proc_fops)
+{
+	return NULL;
+}
+static inline struct proc_dir_entry *proc_create_data(const char *name,
+	mode_t mode, struct proc_dir_entry *parent,
+	const struct file_operations *proc_fops, void *data)
+{
+	return NULL;
+}
+#define remove_proc_entry(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 *create_proc_read_entry(const char *name,
+	mode_t mode, struct proc_dir_entry *base, 
+	read_proc_t *read_proc, void * data) { return NULL; }
+
+struct tty_driver;
+static inline void proc_tty_register_driver(struct tty_driver *driver) {};
+static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
+
+static inline int pid_ns_prepare_proc(struct pid_namespace *ns)
+{
+	return 0;
+}
+
+static inline void pid_ns_release_proc(struct pid_namespace *ns)
+{
+}
+
+static inline void set_mm_exe_file(struct mm_struct *mm,
+				   struct file *new_exe_file)
+{}
+
+static inline struct file *get_mm_exe_file(struct mm_struct *mm)
+{
+	return NULL;
+}
+
+static inline void dup_mm_exe_file(struct mm_struct *oldmm,
+	       			   struct mm_struct *newmm)
+{}
+
+#endif /* CONFIG_PROC_FS */
+
+#if !defined(CONFIG_PROC_KCORE)
+static inline void kclist_add(struct kcore_list *new, void *addr, size_t size)
+{
+}
+#else
+extern void kclist_add(struct kcore_list *, void *, size_t);
+#endif
+
+union proc_op {
+	int (*proc_get_link)(struct inode *, 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 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 struct net *PDE_NET(struct proc_dir_entry *pde)
+{
+	return pde->parent->data;
+}
+
+struct proc_maps_private {
+	struct pid *pid;
+	struct task_struct *task;
+#ifdef CONFIG_MMU
+	struct vm_area_struct *tail_vma;
+#endif
+};
+
+#endif /* _LINUX_PROC_FS_H */