linux-ext4 - [PATCH v9 8/9] ext4: add a mount opt to forcefully turn fast commits on

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: <20200919005451.3899779-9-harshadshirwadkar@gmail.com>
Date:   Fri, 18 Sep 2020 17:54:50 -0700
From:   Harshad Shirwadkar <harshadshirwadkar@...il.com>
To:     linux-ext4@...r.kernel.org
Cc:     tytso@....edu, Harshad Shirwadkar <harshadshirwadkar@...il.com>
Subject: [PATCH v9 8/9] ext4: add a mount opt to forcefully turn fast commits on

This is a debug only mount option that forcefully turns fast commits
on at mount time.

Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@...il.com>
---
 fs/ext4/super.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 967c4eac87d2..43ac8c19bf1d 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1536,8 +1536,9 @@ enum {
 	Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache,
 	Opt_prefetch_block_bitmaps, Opt_no_fc,
 #ifdef CONFIG_EXT4_DEBUG
-	Opt_fc_debug_max_replay
+	Opt_fc_debug_max_replay,
 #endif
+	Opt_fc_debug_force
 };
 
 static const match_table_t tokens = {
@@ -1625,6 +1626,7 @@ static const match_table_t tokens = {
 	{Opt_init_itable, "init_itable"},
 	{Opt_noinit_itable, "noinit_itable"},
 	{Opt_no_fc, "no_fc"},
+	{Opt_fc_debug_force, "fc_debug_force"},
 #ifdef CONFIG_EXT4_DEBUG
 	{Opt_fc_debug_max_replay, "fc_debug_max_replay=%u"},
 #endif
@@ -1856,6 +1858,8 @@ static const struct mount_opts {
 	 MOPT_SET},
 	{Opt_no_fc, EXT4_MOUNT2_JOURNAL_FAST_COMMIT,
 	 MOPT_CLEAR | MOPT_2 | MOPT_EXT4_ONLY},
+	{Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT,
+	 MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY},
 #ifdef CONFIG_EXT4_DEBUG
 	{Opt_fc_debug_max_replay, 0, MOPT_GTE0},
 #endif
-- 
2.28.0.681.g6f77f65b4e-goog