[PATCH] Vectorize aio_read/aio_write fileop methods

This patch vectorizes aio_read() and aio_write() methods to prepare for
collapsing all aio & vectored operations into one interface - which is
aio_read()/aio_write().

Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Michael Holzheu <HOLZHEU@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 23 insertions, 26 deletions

diff --git a/net/socket.c b/net/socket.c
index 1bc4167..df92e42 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -95,10 +95,10 @@
 #include <linux/netfilter.h>
 
 static int sock_no_open(struct inode *irrelevant, struct file *dontcare);
-static ssize_t sock_aio_read(struct kiocb *iocb, char __user *buf,
-			     size_t size, loff_t pos);
-static ssize_t sock_aio_write(struct kiocb *iocb, const char __user *buf,
-			      size_t size, loff_t pos);
+static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
+			 unsigned long nr_segs, loff_t pos);
+static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
+			  unsigned long nr_segs, loff_t pos);
 static int sock_mmap(struct file *file, struct vm_area_struct *vma);
 
 static int sock_close(struct inode *inode, struct file *file);
@@ -664,7 +664,6 @@ static ssize_t sock_sendpage(struct file *file, struct page *page,
 }
 
 static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb,
-					 char __user *ubuf, size_t size,
 					 struct sock_iocb *siocb)
 {
 	if (!is_sync_kiocb(iocb)) {
@@ -675,16 +674,13 @@ static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb,
 	}
 
 	siocb->kiocb = iocb;
-	siocb->async_iov.iov_base = ubuf;
-	siocb->async_iov.iov_len = size;
-
 	iocb->private = siocb;
 	return siocb;
 }
 
 static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb,
-			    struct file *file, struct iovec *iov,
-			    unsigned long nr_segs)
+		struct file *file, const struct iovec *iov,
+		unsigned long nr_segs)
 {
 	struct socket *sock = file->private_data;
 	size_t size = 0;
@@ -715,32 +711,33 @@ static ssize_t sock_readv(struct file *file, const struct iovec *iov,
 	init_sync_kiocb(&iocb, NULL);
 	iocb.private = &siocb;
 
-	ret = do_sock_read(&msg, &iocb, file, (struct iovec *)iov, nr_segs);
+	ret = do_sock_read(&msg, &iocb, file, iov, nr_segs);
 	if (-EIOCBQUEUED == ret)
 		ret = wait_on_sync_kiocb(&iocb);
 	return ret;
 }
 
-static ssize_t sock_aio_read(struct kiocb *iocb, char __user *ubuf,
-			     size_t count, loff_t pos)
+static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
+				unsigned long nr_segs, loff_t pos)
 {
 	struct sock_iocb siocb, *x;
 
 	if (pos != 0)
 		return -ESPIPE;
-	if (count == 0)		/* Match SYS5 behaviour */
+
+	if (iocb->ki_left == 0)	/* Match SYS5 behaviour */
 		return 0;
 
-	x = alloc_sock_iocb(iocb, ubuf, count, &siocb);
+
+	x = alloc_sock_iocb(iocb, &siocb);
 	if (!x)
 		return -ENOMEM;
-	return do_sock_read(&x->async_msg, iocb, iocb->ki_filp,
-			    &x->async_iov, 1);
+	return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs);
 }
 
 static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb,
-			     struct file *file, struct iovec *iov,
-			     unsigned long nr_segs)
+			struct file *file, const struct iovec *iov,
+			unsigned long nr_segs)
 {
 	struct socket *sock = file->private_data;
 	size_t size = 0;
@@ -773,28 +770,28 @@ static ssize_t sock_writev(struct file *file, const struct iovec *iov,
 	init_sync_kiocb(&iocb, NULL);
 	iocb.private = &siocb;
 
-	ret = do_sock_write(&msg, &iocb, file, (struct iovec *)iov, nr_segs);
+	ret = do_sock_write(&msg, &iocb, file, iov, nr_segs);
 	if (-EIOCBQUEUED == ret)
 		ret = wait_on_sync_kiocb(&iocb);
 	return ret;
 }
 
-static ssize_t sock_aio_write(struct kiocb *iocb, const char __user *ubuf,
-			      size_t count, loff_t pos)
+static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
+			  unsigned long nr_segs, loff_t pos)
 {
 	struct sock_iocb siocb, *x;
 
 	if (pos != 0)
 		return -ESPIPE;
-	if (count == 0)		/* Match SYS5 behaviour */
+
+	if (iocb->ki_left == 0)	/* Match SYS5 behaviour */
 		return 0;
 
-	x = alloc_sock_iocb(iocb, (void __user *)ubuf, count, &siocb);
+	x = alloc_sock_iocb(iocb, &siocb);
 	if (!x)
 		return -ENOMEM;
 
-	return do_sock_write(&x->async_msg, iocb, iocb->ki_filp,
-			     &x->async_iov, 1);
+	return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs);
 }
 
 /*