netdev - [PATCH 3/5] eventpoll: move expires to epoll

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20221028214325.13496-4-axboe@kernel.dk>
Date:   Fri, 28 Oct 2022 15:43:23 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Cc:     Jens Axboe <axboe@...nel.dk>
Subject: [PATCH 3/5] eventpoll: move expires to epoll_wq

This makes the expiration available to the wakeup handler. No functional
changes expected in this patch, purely in preparation for being able to
use the timeout on the wakeup side.

Signed-off-by: Jens Axboe <axboe@...nel.dk>
---
 fs/eventpoll.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index f53bb4ec9e91..8b3c94ab7762 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1765,6 +1765,7 @@ static int ep_autoremove_wake_function(struct wait_queue_entry *wq_entry,
 struct epoll_wq {
 	wait_queue_entry_t wait;
 	struct hrtimer timer;
+	ktime_t timeout_ts;
 	bool timed_out;
 };
 
@@ -1825,7 +1826,7 @@ static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events,
 {
 	int res, eavail;
 	u64 slack = 0;
-	ktime_t expires, *to = NULL;
+	ktime_t *to = NULL;
 	struct epoll_wq ewq;
 
 	lockdep_assert_irqs_enabled();
@@ -1834,7 +1835,7 @@ static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events,
 
 	if (timeout && (timeout->tv_sec | timeout->tv_nsec)) {
 		slack = select_estimate_accuracy(timeout);
-		to = &expires;
+		to = &ewq.timeout_ts;
 		*to = timespec64_to_ktime(*timeout);
 	} else if (timeout) {
 		/*
-- 
2.35.1