Add support for async operations.
Signed-off-by: Tadeusz Struk <tadeusz.struk@xxxxxxxxx>
---
include/linux/socket.h | 1 +
net/compat.c | 2 ++
net/socket.c | 8 ++++++--
3 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/include/linux/socket.h b/include/linux/socket.h
index fab4d0d..c9852ef 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -51,6 +51,7 @@ struct msghdr {
void *msg_control; /* ancillary data */
__kernel_size_t msg_controllen; /* ancillary data buffer length */
unsigned int msg_flags; /* flags on received message */
+ struct kiocb *msg_iocb; /* ptr to iocb for async requests */
};
struct user_msghdr {
diff --git a/net/compat.c b/net/compat.c
index 4784431..7fb7ad1 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -72,6 +72,8 @@ ssize_t get_compat_msghdr(struct msghdr *kmsg,
if (nr_segs > UIO_MAXIOV)
return -EMSGSIZE;
+ kmsg->msg_iocb = NULL;
+
err = compat_rw_copy_check_uvector(save_addr ? READ : WRITE,
compat_ptr(uiov), nr_segs,
UIO_FASTIOV, *iov, iov);
diff --git a/net/socket.c b/net/socket.c
index 95d3085..fafc50a 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -798,7 +798,8 @@ static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
struct file *file = iocb->ki_filp;
struct socket *sock = file->private_data;
- struct msghdr msg = {.msg_iter = *to};
+ struct msghdr msg = {.msg_iter = *to,
+ .msg_iocb = iocb};
ssize_t res;
if (file->f_flags & O_NONBLOCK)
@@ -819,7 +820,8 @@ static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
struct socket *sock = file->private_data;
- struct msghdr msg = {.msg_iter = *from};
+ struct msghdr msg = {.msg_iter = *from,
+ .msg_iocb = iocb};
ssize_t res;
if (iocb->ki_pos != 0)
@@ -1890,6 +1892,8 @@ static ssize_t copy_msghdr_from_user(struct msghdr *kmsg,
if (nr_segs > UIO_MAXIOV)
return -EMSGSIZE;
+ kmsg->msg_iocb = NULL;
+
err = rw_copy_check_uvector(save_addr ? READ : WRITE,
uiov, nr_segs,
UIO_FASTIOV, *iov, iov);
--
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