#ifndef __LINUX_FILE_H
#define __LINUX_FILE_H
-#include <asm/atomic.h>
-#include <linux/posix_types.h>
#include <linux/compiler.h>
-#include <linux/spinlock.h>
-#include <linux/rcupdate.h>
#include <linux/types.h>
+#include <linux/posix_types.h>
-/*
- * The default fd array needs to be at least BITS_PER_LONG,
- * as this is the granularity returned by copy_fdset().
- */
-#define NR_OPEN_DEFAULT BITS_PER_LONG
-
-/*
- * The embedded_fd_set is a small fd_set,
- * suitable for most tasks (which open <= BITS_PER_LONG files)
- */
-struct embedded_fd_set {
- unsigned long fds_bits[1];
-};
-
-struct fdtable {
- unsigned int max_fds;
- struct file ** fd; /* current fd array */
- fd_set *close_on_exec;
- fd_set *open_fds;
- struct rcu_head rcu;
- struct files_struct *free_files;
- struct fdtable *next;
-};
-
-/*
- * Open file table structure
- */
-struct files_struct {
- /*
- * read mostly part
- */
- atomic_t count;
- struct fdtable *fdt;
- struct fdtable fdtab;
- /*
- * written part on a separate cache line in SMP
- */
- spinlock_t file_lock ____cacheline_aligned_in_smp;
- int next_fd;
- struct embedded_fd_set close_on_exec_init;
- struct embedded_fd_set open_fds_init;
- struct file * fd_array[NR_OPEN_DEFAULT];
-};
-
-#define files_fdtable(files) (rcu_dereference((files)->fdt))
+struct file;
-extern struct kmem_cache *filp_cachep;
+extern void __fput(struct file *);
+extern void fput(struct file *);
+extern void drop_file_write_access(struct file *file);
-extern void FASTCALL(__fput(struct file *));
-extern void FASTCALL(fput(struct file *));
+struct file_operations;
+struct vfsmount;
+struct dentry;
+extern int init_file(struct file *, struct vfsmount *mnt,
+ struct dentry *dentry, fmode_t mode,
+ const struct file_operations *fop);
+extern struct file *alloc_file(struct vfsmount *, struct dentry *dentry,
+ fmode_t mode, const struct file_operations *fop);
static inline void fput_light(struct file *file, int fput_needed)
{
fput(file);
}
-extern struct file * FASTCALL(fget(unsigned int fd));
-extern struct file * FASTCALL(fget_light(unsigned int fd, int *fput_needed));
-extern void FASTCALL(set_close_on_exec(unsigned int fd, int flag));
+extern struct file *fget(unsigned int fd);
+extern struct file *fget_light(unsigned int fd, int *fput_needed);
+extern void set_close_on_exec(unsigned int fd, int flag);
extern void put_filp(struct file *);
+extern int alloc_fd(unsigned start, unsigned flags);
extern int get_unused_fd(void);
-extern void FASTCALL(put_unused_fd(unsigned int fd));
-struct kmem_cache;
-
-extern struct file ** alloc_fd_array(int);
-extern void free_fd_array(struct file **, int);
-
-extern fd_set *alloc_fdset(int);
-extern void free_fdset(fd_set *, int);
-
-extern int expand_files(struct files_struct *, int nr);
-extern void free_fdtable(struct fdtable *fdt);
-extern void __init files_defer_init(void);
-
-static inline struct file * fcheck_files(struct files_struct *files, unsigned int fd)
-{
- struct file * file = NULL;
- struct fdtable *fdt = files_fdtable(files);
-
- if (fd < fdt->max_fds)
- file = rcu_dereference(fdt->fd[fd]);
- return file;
-}
-
-/*
- * Check whether the specified fd has an open file.
- */
-#define fcheck(fd) fcheck_files(current->files, fd)
-
-extern void FASTCALL(fd_install(unsigned int fd, struct file * file));
-
-struct task_struct;
-
-struct files_struct *get_files_struct(struct task_struct *);
-void FASTCALL(put_files_struct(struct files_struct *fs));
-void reset_files_struct(struct task_struct *, struct files_struct *);
+#define get_unused_fd_flags(flags) alloc_fd(0, (flags))
+extern void put_unused_fd(unsigned int fd);
-extern struct kmem_cache *files_cachep;
+extern void fd_install(unsigned int fd, struct file *file);
#endif /* __LINUX_FILE_H */