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Commit 251b42a1 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Al Viro
Browse files

fs: remove do_readv_writev 



opencode it in both callers to simplify the call stack a bit.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 20223f0f

fs/read_write.c

+21 −22
Original line number Diff line number Diff line
@@ -951,51 +951,50 @@ static ssize_t __do_readv_writev(int type, struct file *file, 
	return ret;

}



static ssize_t do_readv_writev(int type, struct file *file,

			       const struct iovec __user *uvector,

			       unsigned long nr_segs, loff_t *pos,

			       int flags)

ssize_t vfs_readv(struct file *file, const struct iovec __user *vec,

		  unsigned long vlen, loff_t *pos, int flags)

{

	struct iovec iovstack[UIO_FASTIOV];

	struct iovec *iov = iovstack;

	struct iov_iter iter;

	ssize_t ret;



	ret = import_iovec(type, uvector, nr_segs,

			   ARRAY_SIZE(iovstack), &iov, &iter);

	if (ret < 0)

		return ret;



	ret = __do_readv_writev(type, file, &iter, pos, flags);

	kfree(iov);



	return ret;

}



ssize_t vfs_readv(struct file *file, const struct iovec __user *vec,

		  unsigned long vlen, loff_t *pos, int flags)

{

	if (!(file->f_mode & FMODE_READ))

		return -EBADF;

	if (!(file->f_mode & FMODE_CAN_READ))

		return -EINVAL;



	return do_readv_writev(READ, file, vec, vlen, pos, flags);

}

	ret = import_iovec(READ, vec, vlen, ARRAY_SIZE(iovstack), &iov, &iter);

	if (ret < 0)

		return ret;



	ret = __do_readv_writev(READ, file, &iter, pos, flags);

	kfree(iov);

	return ret;

}

EXPORT_SYMBOL(vfs_readv);



ssize_t vfs_writev(struct file *file, const struct iovec __user *vec,

		   unsigned long vlen, loff_t *pos, int flags)

{

	struct iovec iovstack[UIO_FASTIOV];

	struct iovec *iov = iovstack;

	struct iov_iter iter;

	ssize_t ret;



	if (!(file->f_mode & FMODE_WRITE))

		return -EBADF;

	if (!(file->f_mode & FMODE_CAN_WRITE))

		return -EINVAL;



	return do_readv_writev(WRITE, file, vec, vlen, pos, flags);

}

	ret = import_iovec(WRITE, vec, vlen, ARRAY_SIZE(iovstack), &iov, &iter);

	if (ret < 0)

		return ret;



	ret = __do_readv_writev(WRITE, file, &iter, pos, flags);

	kfree(iov);

	return ret;

}

EXPORT_SYMBOL(vfs_writev);



static ssize_t do_readv(unsigned long fd, const struct iovec __user *vec,