294 lines
8.0 KiB
C
294 lines
8.0 KiB
C
#ifndef _LINUX_PROC_FS_H
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#define _LINUX_PROC_FS_H
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <linux/spinlock.h>
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#include <linux/magic.h>
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#include <asm/atomic.h>
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struct net;
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struct completion;
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struct mm_struct;
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/*
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* The proc filesystem constants/structures
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*/
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/*
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* Offset of the first process in the /proc root directory..
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*/
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#define FIRST_PROCESS_ENTRY 256
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/* Worst case buffer size needed for holding an integer. */
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#define PROC_NUMBUF 13
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/*
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* We always define these enumerators
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*/
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enum {
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PROC_ROOT_INO = 1,
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};
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/*
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* This is not completely implemented yet. The idea is to
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* create an in-memory tree (like the actual /proc filesystem
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* tree) of these proc_dir_entries, so that we can dynamically
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* add new files to /proc.
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*
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* The "next" pointer creates a linked list of one /proc directory,
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* while parent/subdir create the directory structure (every
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* /proc file has a parent, but "subdir" is NULL for all
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* non-directory entries).
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*/
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typedef int (read_proc_t)(char *page, char **start, off_t off,
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int count, int *eof, void *data);
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typedef int (write_proc_t)(struct file *file, const char __user *buffer,
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unsigned long count, void *data);
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struct proc_dir_entry {
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unsigned int low_ino;
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unsigned int namelen;
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const char *name;
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mode_t mode;
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nlink_t nlink;
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uid_t uid;
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gid_t gid;
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loff_t size;
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const struct inode_operations *proc_iops;
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/*
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* NULL ->proc_fops means "PDE is going away RSN" or
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* "PDE is just created". In either case, e.g. ->read_proc won't be
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* called because it's too late or too early, respectively.
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*
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* If you're allocating ->proc_fops dynamically, save a pointer
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* somewhere.
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*/
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const struct file_operations *proc_fops;
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struct proc_dir_entry *next, *parent, *subdir;
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void *data;
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read_proc_t *read_proc;
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write_proc_t *write_proc;
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atomic_t count; /* use count */
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int pde_users; /* number of callers into module in progress */
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spinlock_t pde_unload_lock; /* proc_fops checks and pde_users bumps */
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struct completion *pde_unload_completion;
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struct list_head pde_openers; /* who did ->open, but not ->release */
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};
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enum kcore_type {
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KCORE_TEXT,
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KCORE_VMALLOC,
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KCORE_RAM,
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KCORE_VMEMMAP,
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KCORE_OTHER,
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};
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struct kcore_list {
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struct list_head list;
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unsigned long addr;
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size_t size;
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int type;
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};
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struct vmcore {
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struct list_head list;
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unsigned long long paddr;
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unsigned long long size;
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loff_t offset;
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};
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#ifdef CONFIG_PROC_FS
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extern void proc_root_init(void);
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void proc_flush_task(struct task_struct *task);
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extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
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struct proc_dir_entry *parent);
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struct proc_dir_entry *proc_create_data(const char *name, mode_t mode,
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struct proc_dir_entry *parent,
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const struct file_operations *proc_fops,
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void *data);
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extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
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struct pid_namespace;
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extern int pid_ns_prepare_proc(struct pid_namespace *ns);
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extern void pid_ns_release_proc(struct pid_namespace *ns);
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/*
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* proc_tty.c
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*/
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struct tty_driver;
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extern void proc_tty_init(void);
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extern void proc_tty_register_driver(struct tty_driver *driver);
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extern void proc_tty_unregister_driver(struct tty_driver *driver);
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/*
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* proc_devtree.c
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*/
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#ifdef CONFIG_PROC_DEVICETREE
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struct device_node;
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struct property;
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extern void proc_device_tree_init(void);
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extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
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extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop);
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extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde,
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struct property *prop);
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extern void proc_device_tree_update_prop(struct proc_dir_entry *pde,
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struct property *newprop,
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struct property *oldprop);
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#endif /* CONFIG_PROC_DEVICETREE */
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extern struct proc_dir_entry *proc_symlink(const char *,
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struct proc_dir_entry *, const char *);
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extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);
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extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
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struct proc_dir_entry *parent);
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static inline struct proc_dir_entry *proc_create(const char *name, mode_t mode,
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struct proc_dir_entry *parent, const struct file_operations *proc_fops)
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{
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return proc_create_data(name, mode, parent, proc_fops, NULL);
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}
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static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
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mode_t mode, struct proc_dir_entry *base,
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read_proc_t *read_proc, void * data)
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{
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struct proc_dir_entry *res=create_proc_entry(name,mode,base);
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if (res) {
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res->read_proc=read_proc;
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res->data=data;
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}
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return res;
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}
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extern struct proc_dir_entry *proc_net_fops_create(struct net *net,
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const char *name, mode_t mode, const struct file_operations *fops);
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extern void proc_net_remove(struct net *net, const char *name);
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extern struct proc_dir_entry *proc_net_mkdir(struct net *net, const char *name,
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struct proc_dir_entry *parent);
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extern struct file *proc_ns_fget(int fd);
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#else
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#define proc_net_fops_create(net, name, mode, fops) ({ (void)(mode), NULL; })
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static inline void proc_net_remove(struct net *net, const char *name) {}
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static inline void proc_flush_task(struct task_struct *task)
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{
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}
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static inline struct proc_dir_entry *create_proc_entry(const char *name,
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mode_t mode, struct proc_dir_entry *parent) { return NULL; }
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static inline struct proc_dir_entry *proc_create(const char *name,
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mode_t mode, struct proc_dir_entry *parent,
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const struct file_operations *proc_fops)
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{
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return NULL;
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}
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static inline struct proc_dir_entry *proc_create_data(const char *name,
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mode_t mode, struct proc_dir_entry *parent,
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const struct file_operations *proc_fops, void *data)
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{
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return NULL;
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}
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#define remove_proc_entry(name, parent) do {} while (0)
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static inline struct proc_dir_entry *proc_symlink(const char *name,
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struct proc_dir_entry *parent,const char *dest) {return NULL;}
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static inline struct proc_dir_entry *proc_mkdir(const char *name,
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struct proc_dir_entry *parent) {return NULL;}
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static inline struct proc_dir_entry *proc_mkdir_mode(const char *name,
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mode_t mode, struct proc_dir_entry *parent) { return NULL; }
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static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
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mode_t mode, struct proc_dir_entry *base,
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read_proc_t *read_proc, void * data) { return NULL; }
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struct tty_driver;
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static inline void proc_tty_register_driver(struct tty_driver *driver) {};
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static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
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static inline int pid_ns_prepare_proc(struct pid_namespace *ns)
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{
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return 0;
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}
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static inline void pid_ns_release_proc(struct pid_namespace *ns)
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{
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}
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static inline struct file *proc_ns_fget(int fd)
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{
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return ERR_PTR(-EINVAL);
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}
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#endif /* CONFIG_PROC_FS */
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#if !defined(CONFIG_PROC_KCORE)
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static inline void
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kclist_add(struct kcore_list *new, void *addr, size_t size, int type)
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{
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}
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#else
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extern void kclist_add(struct kcore_list *, void *, size_t, int type);
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#endif
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struct nsproxy;
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struct proc_ns_operations {
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const char *name;
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int type;
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void *(*get)(struct task_struct *task);
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void (*put)(void *ns);
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int (*install)(struct nsproxy *nsproxy, void *ns);
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};
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extern const struct proc_ns_operations netns_operations;
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extern const struct proc_ns_operations utsns_operations;
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extern const struct proc_ns_operations ipcns_operations;
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union proc_op {
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int (*proc_get_link)(struct inode *, struct path *);
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int (*proc_read)(struct task_struct *task, char *page);
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int (*proc_show)(struct seq_file *m,
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struct pid_namespace *ns, struct pid *pid,
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struct task_struct *task);
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};
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struct ctl_table_header;
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struct ctl_table;
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struct proc_inode {
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struct pid *pid;
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int fd;
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union proc_op op;
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struct proc_dir_entry *pde;
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struct ctl_table_header *sysctl;
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struct ctl_table *sysctl_entry;
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void *ns;
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const struct proc_ns_operations *ns_ops;
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struct inode vfs_inode;
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};
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static inline struct proc_inode *PROC_I(const struct inode *inode)
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{
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return container_of(inode, struct proc_inode, vfs_inode);
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}
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static inline struct proc_dir_entry *PDE(const struct inode *inode)
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{
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return PROC_I(inode)->pde;
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}
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static inline struct net *PDE_NET(struct proc_dir_entry *pde)
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{
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return pde->parent->data;
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}
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#endif /* _LINUX_PROC_FS_H */
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