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Subject[GIT PULL] multi-layer support for overlay filesystem

Please pull from

git:// overlayfs-next

This adds support for multiple read-only layers to overlayfs. It also makes the
writable upper layer optional.

This is a highly requested feature and has been in -next for the last cycle.


Miklos Szeredi (16):
ovl: check whiteout while reading directory
ovl: make path-type a bitmap
ovl: dont replace opaque dir
ovl: add mutli-layer infrastructure
ovl: helper to iterate layers
ovl: multi-layer readdir
ovl: multi-layer lookup
ovl: check whiteout on lowest layer as well
ovl: lookup ENAMETOOLONG on lower means ENOENT
ovl: allow statfs if no upper layer
ovl: mount: change order of initialization
ovl: improve mount helpers
ovl: make upperdir optional
ovl: support multiple lower layers
ovl: add testsuite to docs
ovl: document lower layer ordering

Seunghun Lee (1):
ovl: Prevent rw remount when it should be ro mount

hujianyang (5):
ovl: Cleanup redundant blank lines
ovl: Use macros to present ovl_xattr
ovl: Fix kernel panic while mounting overlayfs
ovl: Fix opaque regression in ovl_lookup
ovl: discard independent cursor in readdir()

Documentation/filesystems/overlayfs.txt | 28 ++
fs/overlayfs/copy_up.c | 5 +-
fs/overlayfs/dir.c | 28 +-
fs/overlayfs/inode.c | 12 +-
fs/overlayfs/overlayfs.h | 18 +-
fs/overlayfs/readdir.c | 181 +++++-----
fs/overlayfs/super.c | 564 +++++++++++++++++++++-----------
7 files changed, 517 insertions(+), 319 deletions(-)

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