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: <20240124115938.80132-5-byungchul@sk.com>
Date: Wed, 24 Jan 2024 20:59:15 +0900
From: Byungchul Park <byungchul@...com>
To: linux-kernel@...r.kernel.org
Cc: kernel_team@...ynix.com,
	torvalds@...ux-foundation.org,
	damien.lemoal@...nsource.wdc.com,
	linux-ide@...r.kernel.org,
	adilger.kernel@...ger.ca,
	linux-ext4@...r.kernel.org,
	mingo@...hat.com,
	peterz@...radead.org,
	will@...nel.org,
	tglx@...utronix.de,
	rostedt@...dmis.org,
	joel@...lfernandes.org,
	sashal@...nel.org,
	daniel.vetter@...ll.ch,
	duyuyang@...il.com,
	johannes.berg@...el.com,
	tj@...nel.org,
	tytso@....edu,
	willy@...radead.org,
	david@...morbit.com,
	amir73il@...il.com,
	gregkh@...uxfoundation.org,
	kernel-team@....com,
	linux-mm@...ck.org,
	akpm@...ux-foundation.org,
	mhocko@...nel.org,
	minchan@...nel.org,
	hannes@...xchg.org,
	vdavydov.dev@...il.com,
	sj@...nel.org,
	jglisse@...hat.com,
	dennis@...nel.org,
	cl@...ux.com,
	penberg@...nel.org,
	rientjes@...gle.com,
	vbabka@...e.cz,
	ngupta@...are.org,
	linux-block@...r.kernel.org,
	josef@...icpanda.com,
	linux-fsdevel@...r.kernel.org,
	viro@...iv.linux.org.uk,
	jack@...e.cz,
	jlayton@...nel.org,
	dan.j.williams@...el.com,
	hch@...radead.org,
	djwong@...nel.org,
	dri-devel@...ts.freedesktop.org,
	rodrigosiqueiramelo@...il.com,
	melissa.srw@...il.com,
	hamohammed.sa@...il.com,
	42.hyeyoo@...il.com,
	chris.p.wilson@...el.com,
	gwan-gyeong.mun@...el.com,
	max.byungchul.park@...il.com,
	boqun.feng@...il.com,
	longman@...hat.com,
	hdanton@...a.com,
	her0gyugyu@...il.com
Subject: [PATCH v11 04/26] dept: Add lock dependency tracker APIs

Wrapped the base APIs for easier annotation on typical lock.

Signed-off-by: Byungchul Park <byungchul@...com>
---
 include/linux/dept_ldt.h | 77 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 include/linux/dept_ldt.h

diff --git a/include/linux/dept_ldt.h b/include/linux/dept_ldt.h
new file mode 100644
index 000000000000..062613e89fc3
--- /dev/null
+++ b/include/linux/dept_ldt.h
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Lock Dependency Tracker
+ *
+ * Started by Byungchul Park <max.byungchul.park@...il.com>:
+ *
+ *  Copyright (c) 2020 LG Electronics, Inc., Byungchul Park
+ */
+
+#ifndef __LINUX_DEPT_LDT_H
+#define __LINUX_DEPT_LDT_H
+
+#include <linux/dept.h>
+
+#ifdef CONFIG_DEPT
+#define LDT_EVT_L			1UL
+#define LDT_EVT_R			2UL
+#define LDT_EVT_W			1UL
+#define LDT_EVT_RW			(LDT_EVT_R | LDT_EVT_W)
+#define LDT_EVT_ALL			(LDT_EVT_L | LDT_EVT_RW)
+
+#define ldt_init(m, k, su, n)		dept_map_init(m, k, su, n)
+#define ldt_lock(m, sl, t, n, i)					\
+	do {								\
+		if (n)							\
+			dept_ecxt_enter_nokeep(m);			\
+		else if (t)						\
+			dept_ecxt_enter(m, LDT_EVT_L, i, "trylock", "unlock", sl);\
+		else {							\
+			dept_wait(m, LDT_EVT_L, i, "lock", sl);		\
+			dept_ecxt_enter(m, LDT_EVT_L, i, "lock", "unlock", sl);\
+		}							\
+	} while (0)
+
+#define ldt_rlock(m, sl, t, n, i, q)					\
+	do {								\
+		if (n)							\
+			dept_ecxt_enter_nokeep(m);			\
+		else if (t)						\
+			dept_ecxt_enter(m, LDT_EVT_R, i, "read_trylock", "read_unlock", sl);\
+		else {							\
+			dept_wait(m, q ? LDT_EVT_RW : LDT_EVT_W, i, "read_lock", sl);\
+			dept_ecxt_enter(m, LDT_EVT_R, i, "read_lock", "read_unlock", sl);\
+		}							\
+	} while (0)
+
+#define ldt_wlock(m, sl, t, n, i)					\
+	do {								\
+		if (n)							\
+			dept_ecxt_enter_nokeep(m);			\
+		else if (t)						\
+			dept_ecxt_enter(m, LDT_EVT_W, i, "write_trylock", "write_unlock", sl);\
+		else {							\
+			dept_wait(m, LDT_EVT_RW, i, "write_lock", sl);	\
+			dept_ecxt_enter(m, LDT_EVT_W, i, "write_lock", "write_unlock", sl);\
+		}							\
+	} while (0)
+
+#define ldt_unlock(m, i)		dept_ecxt_exit(m, LDT_EVT_ALL, i)
+
+#define ldt_downgrade(m, i)						\
+	do {								\
+		if (dept_ecxt_holding(m, LDT_EVT_W))			\
+			dept_map_ecxt_modify(m, LDT_EVT_W, NULL, LDT_EVT_R, i, "downgrade", "read_unlock", -1);\
+	} while (0)
+
+#define ldt_set_class(m, n, k, sl, i)	dept_map_ecxt_modify(m, LDT_EVT_ALL, k, 0UL, i, "lock_set_class", "(any)unlock", sl)
+#else /* !CONFIG_DEPT */
+#define ldt_init(m, k, su, n)		do { (void)(k); } while (0)
+#define ldt_lock(m, sl, t, n, i)	do { } while (0)
+#define ldt_rlock(m, sl, t, n, i, q)	do { } while (0)
+#define ldt_wlock(m, sl, t, n, i)	do { } while (0)
+#define ldt_unlock(m, i)		do { } while (0)
+#define ldt_downgrade(m, i)		do { } while (0)
+#define ldt_set_class(m, n, k, sl, i)	do { } while (0)
+#endif
+#endif /* __LINUX_DEPT_LDT_H */
-- 
2.17.1


Powered by blists - more mailing lists