[PATCH v2 0/4] ubifs: Add overlayfs support
From: Richard Weinberger
Date: Wed Sep 14 2016 - 16:29:54 EST
To support overlayfs in a proper way a filesystem has to offer support
for DT_CHR, RENAME_WHITEOUT and RENAME_EXCHANGE.
While UBIFS supports DT_CHR it lacks support for RENAME_WHITEOUT and
RENAME_EXCHANGE. This patch series implement the missing bits.
RENAME_WHITEOUT itself depends on O_TMPFILE, therefore O_TMPFILE is now
also supported.
Changes since v1:
- Build fix for CONFIG_LOCKDEP=y
- Fix for wrong dentry name length calculation in ubifs_jnl_xrename()
- Fix for wrong directory link count after RENAME_EXCHANGE
Richard Weinberger (4):
ubifs: Implement O_TMPFILE
ubifs: Implement RENAME_WHITEOUT
ubifs: Implement RENAME_EXCHANGE
ubifs: Use move variable in ubifs_rename()
fs/ubifs/dir.c | 242 +++++++++++++++++++++++++++++++++++++++++++++++++----
fs/ubifs/journal.c | 188 +++++++++++++++++++++++++++++++++++++----
fs/ubifs/ubifs.h | 8 +-
3 files changed, 404 insertions(+), 34 deletions(-)
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2.7.3