From deb971593f54253841e9e22abd3d46b69e1dda95 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@cloudius-systems.com>
Date: Sat, 19 Jan 2013 13:54:05 +0100
Subject: [PATCH] implement vectored I/O (readv/writev)
---
fs/vfs/main.c | 41 +++++++++++++++++++++++++++++++++++++++++
runtime.cc | 10 ----------
2 files changed, 41 insertions(+), 10 deletions(-)
diff --git a/fs/vfs/main.c b/fs/vfs/main.c
index 43180d056..6ce5c402f 100755
--- a/fs/vfs/main.c
+++ b/fs/vfs/main.c
@@ -223,6 +223,47 @@ out_errno:
return -1;
}
+ssize_t readv(int fd, const struct iovec *iov, int iovcnt)
+{
+ struct task *t = main_task;
+ file_t fp;
+ size_t bytes;
+ int error;
+
+ error = EBADF;
+ if ((fp = task_getfp(t, fd)) == NULL)
+ goto out_errno;
+
+ error = sys_read(fp, (struct iovec *)iov, iovcnt, &bytes);
+ if (error)
+ goto out_errno;
+
+ return bytes;
+out_errno:
+ errno = error;
+ return -1;
+}
+
+ssize_t writev(int fd, const struct iovec *iov, int iovcnt)
+{
+ struct task *t = main_task;
+ file_t fp;
+ size_t bytes;
+ int error;
+
+ error = EBADF;
+ if ((fp = task_getfp(t, fd)) == NULL)
+ goto out_errno;
+
+ error = sys_write(fp, (struct iovec *)iov, iovcnt, &bytes);
+ if (error)
+ goto out_errno;
+ return bytes;
+out_errno:
+ errno = error;
+ return -1;
+}
+
#if 0
static int
fs_ioctl(struct task *t, struct ioctl_msg *msg)
diff --git a/runtime.cc b/runtime.cc
index a886ea2b3..28d22c977 100644
--- a/runtime.cc
+++ b/runtime.cc
@@ -207,16 +207,6 @@ int poll(struct pollfd *fds, nfds_t nfds, int timeout)
UNIMPLEMENTED("poll");
}
-ssize_t readv(int fd, const struct iovec *iov, int iovcnt)
-{
- UNIMPLEMENTED("readv");
-}
-
-ssize_t writev(int fd, const struct iovec *iov, int iovcnt)
-{
- UNIMPLEMENTED("writev");
-}
-
ssize_t preadv(int fd, const struct iovec *iov, int iovcnt, off_t offset)
{
UNIMPLEMENTED("preadv");
--
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