f2fs: introduce F2FS_FEATURE_LOST_FOUND feature

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This patch introduces a new feature, F2FS_FEATURE_LOST_FOUND, which
is set by mkfs. mkfs creates a directory named lost+found, which saves
unreachable files. If fsck finds a file which has no parent, or its
parent is removed by fsck, the file will be placed under lost+found
directory by fsck.

lost+found directory could not be encrypted. As a result, the root
directory cannot be encrypted too. So if LOST_FOUND feature is enabled,
let's avoid to encrypt root directory.

Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

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Sheng Yong 2018-03-15 18:51:41 +08:00 • committed by Jaegeuk Kim

parent da5ce874f8

commit b7c409deda

3 changed files with 21 additions and 0 deletions

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2

fs/f2fs/f2fs.h

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12

fs/f2fs/super.c

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7

fs/f2fs/sysfs.c

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