Commit fffce4a4 authored Apr 13, 2020 by Theodore Ts'o Committed by Greg Kroah-Hartman May 02, 2020

ext4: increase wait time needed before reuse of deleted inode numbers

[ Upstream commit a17a9d935dc4a50acefaf319d58030f1da7f115a ]

Current wait times have proven to be too short to protect against inode
reuses that lead to metadata inconsistencies.

Now that we will retry the inode allocation if we can't find any
recently deleted inodes, it's a lot safer to increase the recently
deleted time from 5 seconds to a minute.

Link: https://lore.kernel.org/r/20200414023925.273867-1-tytso@mit.edu


Google-Bug-Id: 36602237
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent 70e1d0a0

fs/ext4/ialloc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -665,7 +665,7 @@ static int find_group_other(struct super_block sb, struct inode parent,
		* block has been written back to disk. (Yes, these values are
		* somewhat arbitrary...)
		*/
		#define RECENTCY_MIN 5
		#define RECENTCY_MIN 60
		#define RECENTCY_DIRTY 300

		static int recently_deleted(struct super_block *sb, ext4_group_t group, int ino)