1 /* 2 * Wrapper functions for accessing the file_struct fd array. 3 */ 4 5 #ifndef __LINUX_FILE_H 6 #define __LINUX_FILE_H 7 8 #include <linux/compiler.h> 9 #include <linux/types.h> 10 #include <linux/posix_types.h> 11 12 struct file; 13 14 extern void fput(struct file *); 15 16 struct file_operations; 17 struct vfsmount; 18 struct dentry; 19 struct path; 20 extern struct file *alloc_file(struct path *, fmode_t mode, 21 const struct file_operations *fop); 22 23 static inline void fput_light(struct file *file, int fput_needed) 24 { 25 if (fput_needed) 26 fput(file); 27 } 28 29 struct fd { 30 struct file *file; 31 int need_put; 32 }; 33 34 static inline void fdput(struct fd fd) 35 { 36 if (fd.need_put) 37 fput(fd.file); 38 } 39 40 extern struct file *fget(unsigned int fd); 41 extern struct file *fget_light(unsigned int fd, int *fput_needed); 42 43 static inline struct fd fdget(unsigned int fd) 44 { 45 int b; 46 struct file *f = fget_light(fd, &b); 47 return (struct fd){f,b}; 48 } 49 50 extern struct file *fget_raw(unsigned int fd); 51 extern struct file *fget_raw_light(unsigned int fd, int *fput_needed); 52 53 static inline struct fd fdget_raw(unsigned int fd) 54 { 55 int b; 56 struct file *f = fget_raw_light(fd, &b); 57 return (struct fd){f,b}; 58 } 59 60 extern int f_dupfd(unsigned int from, struct file *file, unsigned flags); 61 extern int replace_fd(unsigned fd, struct file *file, unsigned flags); 62 extern void set_close_on_exec(unsigned int fd, int flag); 63 extern bool get_close_on_exec(unsigned int fd); 64 extern void put_filp(struct file *); 65 extern int get_unused_fd_flags(unsigned flags); 66 #define get_unused_fd() get_unused_fd_flags(0) 67 extern void put_unused_fd(unsigned int fd); 68 69 extern void fd_install(unsigned int fd, struct file *file); 70 71 extern void flush_delayed_fput(void); 72 extern void __fput_sync(struct file *); 73 74 #endif /* __LINUX_FILE_H */ 75