linux-master/fs/read_write.c

360 	if (unlikely((ssize_t) count < 0))
385 static ssize_t new_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos)
389 	ssize_t ret;
410 ssize_t __kernel_read(struct file *file, void *buf, size_t count, loff_t *pos)
418 	ssize_t ret;
445 ssize_t kernel_read(struct file *file, void *buf, size_t count, loff_t *pos)
447 	ssize_t ret;
456 ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
458 	ssize_t ret;
487 static ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos)
491 	ssize_t ret;
505 ssize_t __kernel_write_iter(struct file *file, struct iov_iter *from, loff_t *pos)
508 	ssize_t ret;
535 ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t *pos)
554 ssize_t kernel_write(struct file *file, const void *buf, size_t count,
557 	ssize_t ret;
570 ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_t *pos)
572 	ssize_t ret;
608 ssize_t ksys_read(unsigned int fd, char __user *buf, size_t count)
611 	ssize_t ret = -EBADF;
632 ssize_t ksys_write(unsigned int fd, const char __user *buf, size_t count)
635 	ssize_t ret = -EBADF;
658 ssize_t ksys_pread64(unsigned int fd, char __user *buf, size_t count,
662 	ssize_t ret = -EBADF;
692 ssize_t ksys_pwrite64(unsigned int fd, const char __user *buf,
696 	ssize_t ret = -EBADF;
726 static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter,
730 	ssize_t ret;
749 static ssize_t do_loop_readv_writev(struct file *filp, struct iov_iter *iter,
752 	ssize_t ret = 0;
758 		ssize_t nr;
782 ssize_t vfs_iocb_iter_read(struct file *file, struct kiocb *iocb,
786 	ssize_t ret = 0;
810 ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos,
814 	ssize_t ret = 0;
842 ssize_t vfs_iocb_iter_write(struct file *file, struct kiocb *iocb,
846 	ssize_t ret = 0;
873 ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos,
877 	ssize_t ret;
904 static ssize_t vfs_readv(struct file *file, const struct iovec __user *vec,
911 	ssize_t ret = 0;
942 static ssize_t vfs_writev(struct file *file, const struct iovec __user *vec,
949 	ssize_t ret = 0;
982 static ssize_t do_readv(unsigned long fd, const struct iovec __user *vec,
986 	ssize_t ret = -EBADF;
1006 static ssize_t do_writev(unsigned long fd, const struct iovec __user *vec,
1010 	ssize_t ret = -EBADF;
1036 static ssize_t do_preadv(unsigned long fd, const struct iovec __user *vec,
1040 	ssize_t ret = -EBADF;
1059 static ssize_t do_pwritev(unsigned long fd, const struct iovec __user *vec,
1063 	ssize_t ret = -EBADF;
1222 static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
1230 	ssize_t retval;
1333 	ssize_t ret;
1351 	ssize_t ret;
1371 	ssize_t ret;
1390 	ssize_t ret;
1483 ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in,
1487 	ssize_t ret;
1583 	ssize_t ret = -EBADF;
1703 ssize_t generic_write_checks(struct kiocb *iocb, struct iov_iter *from)