ovl: whiteout orphan index entries on mount

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Orphan index entries are non-dir index entries whose union nlink count
dropped to zero. With index=on, orphan index entries are removed on
mount. With NFS export feature enabled, orphan index entries are replaced
with white out index entries to block future open by handle from opening
the lower file.

When dir index has a stale 'upper' xattr, we assume that the upper dir
was removed and we treat the dir index as orphan entry that needs to be
whited out or removed.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

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This commit is contained in:

Amir Goldstein 2018-01-11 15:33:51 +02:00 • committed by Miklos Szeredi

parent e7dd0e7134

commit 24f0b17203

2 changed files with 40 additions and 4 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

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19

fs/overlayfs/namei.c

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25

fs/overlayfs/readdir.c

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