| 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 */ |