From: Christoph Hellwig <hch@lst.de>
To: viro@zeniv.linux.org.uk
Cc: Avi Kivity <avi@scylladb.com>,
linux-aio@kvack.org, linux-fsdevel@vger.kernel.org,
netdev@vger.kernel.org, linux-api@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 07/28] net: refactor socket_poll
Date: Wed, 21 Mar 2018 08:40:11 +0100 [thread overview]
Message-ID: <20180321074032.14211-8-hch@lst.de> (raw)
In-Reply-To: <20180321074032.14211-1-hch@lst.de>
Factor out two busy poll related helpers for late reuse, and remove
a command that isn't very helpful, especially with the __poll_t
annotations in place.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
include/net/busy_poll.h | 15 +++++++++++++++
net/socket.c | 21 ++++-----------------
2 files changed, 19 insertions(+), 17 deletions(-)
diff --git a/include/net/busy_poll.h b/include/net/busy_poll.h
index 71c72a939bf8..c5187438af38 100644
--- a/include/net/busy_poll.h
+++ b/include/net/busy_poll.h
@@ -121,6 +121,21 @@ static inline void sk_busy_loop(struct sock *sk, int nonblock)
#endif
}
+static inline void sock_poll_busy_loop(struct socket *sock, __poll_t events)
+{
+ if (sk_can_busy_loop(sock->sk) &&
+ events && (events & POLL_BUSY_LOOP)) {
+ /* once, only if requested by syscall */
+ sk_busy_loop(sock->sk, 1);
+ }
+}
+
+/* if this socket can poll_ll, tell the system call */
+static inline __poll_t sock_poll_busy_flag(struct socket *sock)
+{
+ return sk_can_busy_loop(sock->sk) ? POLL_BUSY_LOOP : 0;
+}
+
/* used in the NIC receive handler to mark the skb */
static inline void skb_mark_napi_id(struct sk_buff *skb,
struct napi_struct *napi)
diff --git a/net/socket.c b/net/socket.c
index a93c99b518ca..3f859a07641a 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1117,24 +1117,11 @@ EXPORT_SYMBOL(sock_create_lite);
/* No kernel lock held - perfect */
static __poll_t sock_poll(struct file *file, poll_table *wait)
{
- __poll_t busy_flag = 0;
- struct socket *sock;
-
- /*
- * We can't return errors to poll, so it's either yes or no.
- */
- sock = file->private_data;
-
- if (sk_can_busy_loop(sock->sk)) {
- /* this socket can poll_ll so tell the system call */
- busy_flag = POLL_BUSY_LOOP;
-
- /* once, only if requested by syscall */
- if (wait && (wait->_key & POLL_BUSY_LOOP))
- sk_busy_loop(sock->sk, 1);
- }
+ struct socket *sock = file->private_data;
+ __poll_t events = poll_requested_events(wait);
- return busy_flag | sock->ops->poll(file, sock, wait);
+ sock_poll_busy_loop(sock, events);
+ return sock->ops->poll(file, sock, wait) | sock_poll_busy_flag(sock);
}
static int sock_mmap(struct file *file, struct vm_area_struct *vma)
--
2.14.2
next prev parent reply other threads:[~2018-03-21 7:49 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-21 7:40 aio poll and a new in-kernel poll API V6 Christoph Hellwig
2018-03-21 7:40 ` [PATCH 01/28] fs: unexport poll_schedule_timeout Christoph Hellwig
2018-03-21 9:05 ` Greg KH
2018-03-21 7:40 ` [PATCH 02/28] fs: cleanup do_pollfd Christoph Hellwig
2018-03-21 9:06 ` Greg KH
2018-03-21 7:40 ` [PATCH 03/28] fs: update documentation to mention __poll_t Christoph Hellwig
2018-03-21 9:06 ` Greg KH
2018-03-21 16:28 ` Darrick J. Wong
2018-03-21 7:40 ` [PATCH 04/28] fs: add new vfs_poll and file_can_poll helpers Christoph Hellwig
2018-03-21 9:07 ` Greg KH
2018-03-21 7:40 ` [PATCH 05/28] fs: introduce new ->get_poll_head and ->poll_mask methods Christoph Hellwig
2018-03-21 9:08 ` Greg KH
2018-03-21 16:29 ` Darrick J. Wong
2018-03-21 7:40 ` [PATCH 06/28] aio: implement IOCB_CMD_POLL Christoph Hellwig
2018-03-21 9:09 ` Greg KH
2018-03-21 16:31 ` Darrick J. Wong
2018-03-22 16:52 ` Al Viro
2018-03-22 17:24 ` Christoph Hellwig
2018-03-22 18:16 ` Al Viro
2018-03-23 18:05 ` Christoph Hellwig
2018-03-21 7:40 ` Christoph Hellwig [this message]
2018-03-21 7:40 ` [PATCH 08/28] net: add support for ->poll_mask in proto_ops Christoph Hellwig
2018-03-21 7:40 ` [PATCH 09/28] net: remove sock_no_poll Christoph Hellwig
2018-03-21 7:40 ` [PATCH 10/28] net/tcp: convert to ->poll_mask Christoph Hellwig
2018-03-21 7:40 ` [PATCH 11/28] net/unix: " Christoph Hellwig
2018-03-21 7:40 ` [PATCH 12/28] net: convert datagram_poll users tp ->poll_mask Christoph Hellwig
2018-03-21 9:11 ` Greg KH
2018-03-21 7:40 ` [PATCH 13/28] net/dccp: convert to ->poll_mask Christoph Hellwig
2018-03-21 7:40 ` [PATCH 14/28] net/atm: " Christoph Hellwig
2018-03-21 7:40 ` [PATCH 15/28] net/vmw_vsock: " Christoph Hellwig
2018-03-21 7:40 ` [PATCH 16/28] net/tipc: " Christoph Hellwig
2018-03-21 7:40 ` [PATCH 17/28] net/sctp: " Christoph Hellwig
2018-03-21 7:40 ` [PATCH 18/28] net/bluetooth: " Christoph Hellwig
2018-03-21 7:40 ` [PATCH 19/28] net/caif: " Christoph Hellwig
2018-03-21 7:40 ` [PATCH 20/28] net/nfc: " Christoph Hellwig
2018-03-21 7:40 ` [PATCH 21/28] net/phonet: " Christoph Hellwig
2018-03-21 7:40 ` [PATCH 22/28] net/iucv: " Christoph Hellwig
2018-03-21 7:40 ` [PATCH 23/28] net/rxrpc: " Christoph Hellwig
2018-03-21 7:40 ` [PATCH 24/28] crypto: af_alg: " Christoph Hellwig
2018-03-21 7:40 ` [PATCH 25/28] pipe: " Christoph Hellwig
2018-03-21 7:40 ` [PATCH 26/28] eventfd: switch " Christoph Hellwig
2018-03-21 7:40 ` [PATCH 27/28] timerfd: convert " Christoph Hellwig
2018-03-21 7:40 ` [PATCH 28/28] random: " Christoph Hellwig
2018-03-21 9:10 ` Greg KH
2018-03-22 13:49 ` Theodore Y. Ts'o
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