read_write.c (3ce4a7bf66263748194b77ccefd284be963c6304) read_write.c (36028d5dd71175c332ab634e089e16dbdfe3812b)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/fs/read_write.c
4 *
5 * Copyright (C) 1991, 1992 Linus Torvalds
6 */
7
8#include <linux/slab.h>

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605}
606
607SYSCALL_DEFINE3(write, unsigned int, fd, const char __user *, buf,
608 size_t, count)
609{
610 return ksys_write(fd, buf, count);
611}
612
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/fs/read_write.c
4 *
5 * Copyright (C) 1991, 1992 Linus Torvalds
6 */
7
8#include <linux/slab.h>

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605}
606
607SYSCALL_DEFINE3(write, unsigned int, fd, const char __user *, buf,
608 size_t, count)
609{
610 return ksys_write(fd, buf, count);
611}
612
613SYSCALL_DEFINE4(pread64, unsigned int, fd, char __user *, buf,
614 size_t, count, loff_t, pos)
613ssize_t ksys_pread64(unsigned int fd, char __user *buf, size_t count,
614 loff_t pos)
615{
616 struct fd f;
617 ssize_t ret = -EBADF;
618
619 if (pos < 0)
620 return -EINVAL;
621
622 f = fdget(fd);
623 if (f.file) {
624 ret = -ESPIPE;
625 if (f.file->f_mode & FMODE_PREAD)
626 ret = vfs_read(f.file, buf, count, &pos);
627 fdput(f);
628 }
629
630 return ret;
631}
632
615{
616 struct fd f;
617 ssize_t ret = -EBADF;
618
619 if (pos < 0)
620 return -EINVAL;
621
622 f = fdget(fd);
623 if (f.file) {
624 ret = -ESPIPE;
625 if (f.file->f_mode & FMODE_PREAD)
626 ret = vfs_read(f.file, buf, count, &pos);
627 fdput(f);
628 }
629
630 return ret;
631}
632
633SYSCALL_DEFINE4(pwrite64, unsigned int, fd, const char __user *, buf,
634 size_t, count, loff_t, pos)
633SYSCALL_DEFINE4(pread64, unsigned int, fd, char __user *, buf,
634 size_t, count, loff_t, pos)
635{
635{
636 return ksys_pread64(fd, buf, count, pos);
637}
638
639ssize_t ksys_pwrite64(unsigned int fd, const char __user *buf,
640 size_t count, loff_t pos)
641{
636 struct fd f;
637 ssize_t ret = -EBADF;
638
639 if (pos < 0)
640 return -EINVAL;
641
642 f = fdget(fd);
643 if (f.file) {
644 ret = -ESPIPE;
645 if (f.file->f_mode & FMODE_PWRITE)
646 ret = vfs_write(f.file, buf, count, &pos);
647 fdput(f);
648 }
649
650 return ret;
651}
652
642 struct fd f;
643 ssize_t ret = -EBADF;
644
645 if (pos < 0)
646 return -EINVAL;
647
648 f = fdget(fd);
649 if (f.file) {
650 ret = -ESPIPE;
651 if (f.file->f_mode & FMODE_PWRITE)
652 ret = vfs_write(f.file, buf, count, &pos);
653 fdput(f);
654 }
655
656 return ret;
657}
658
659SYSCALL_DEFINE4(pwrite64, unsigned int, fd, const char __user *, buf,
660 size_t, count, loff_t, pos)
661{
662 return ksys_pwrite64(fd, buf, count, pos);
663}
664
653static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter,
654 loff_t *ppos, int type, rwf_t flags)
655{
656 struct kiocb kiocb;
657 ssize_t ret;
658
659 init_sync_kiocb(&kiocb, filp);
660 ret = kiocb_set_rw_flags(&kiocb, flags);

--- 1399 unchanged lines hidden --- 		665static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter,
666 loff_t *ppos, int type, rwf_t flags)
667{
668 struct kiocb kiocb;
669 ssize_t ret;
670
671 init_sync_kiocb(&kiocb, filp);
672 ret = kiocb_set_rw_flags(&kiocb, flags);

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