linux-master/fs/read_write.c

73  * @whence:	type of seek
86 generic_file_llseek_size(struct file *file, loff_t offset, int whence,
89 	switch (whence) {
138  * @whence:	type of seek
142  * @offset and @whence.
144 loff_t generic_file_llseek(struct file *file, loff_t offset, int whence)
148 	return generic_file_llseek_size(file, offset, whence,
158  * @whence:	type of seek
162 loff_t fixed_size_llseek(struct file *file, loff_t offset, int whence, loff_t size)
164 	switch (whence) {
166 		return generic_file_llseek_size(file, offset, whence,
178  * @whence:	type of seek
181 loff_t no_seek_end_llseek(struct file *file, loff_t offset, int whence)
183 	switch (whence) {
185 		return generic_file_llseek_size(file, offset, whence,
197  * @whence:	type of seek
201 loff_t no_seek_end_llseek_size(struct file *file, loff_t offset, int whence, loff_t size)
203 	switch (whence) {
205 		return generic_file_llseek_size(file, offset, whence,
217  * @whence:	type of seek
224 loff_t noop_llseek(struct file *file, loff_t offset, int whence)
230 loff_t default_llseek(struct file *file, loff_t offset, int whence)
236 	switch (whence) {
285 loff_t vfs_llseek(struct file *file, loff_t offset, int whence)
289 	return file->f_op->llseek(file, offset, whence);
293 static off_t ksys_lseek(unsigned int fd, off_t offset, unsigned int whence)
301 	if (whence <= SEEK_MAX) {
302 		loff_t res = vfs_llseek(f.file, offset, whence);
311 SYSCALL_DEFINE3(lseek, unsigned int, fd, off_t, offset, unsigned int, whence)
313 	return ksys_lseek(fd, offset, whence);
317 COMPAT_SYSCALL_DEFINE3(lseek, unsigned int, fd, compat_off_t, offset, unsigned int, whence)
319 	return ksys_lseek(fd, offset, whence);
327 		unsigned int, whence)
337 	if (whence > SEEK_MAX)
341 			whence);