diff options
| author | Darrick J. Wong <djwong@kernel.org> | 2024-04-15 14:54:14 -0700 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2024-04-15 14:54:14 -0700 |
| commit | 9a64d9b3109d01cca0b83c1d36538b7a37c5284e (patch) | |
| tree | c33eacfdac02eb3c34365fa448aaf7b2fab437fe /fs/xfs/Makefile | |
| parent | 5b9932f6001c70b984e8c9c2fe09e443beb4baba (diff) | |
xfs: introduce new file range exchange ioctl
Introduce a new ioctl to handle exchanging ranges of bytes
between files. The goal here is to perform the exchange atomically with
respect to applications -- either they see the file contents before the
exchange or they see that A-B is now B-A, even if the kernel crashes.
My original goal with all this code was to make it so that online repair
can build a replacement directory or xattr structure in a temporary file
and commit the repair by atomically exchanging all the data blocks
between the two files. However, I needed a way to test this mechanism
thoroughly, so I've been evolving an ioctl interface since then.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs/Makefile')
| -rw-r--r-- | fs/xfs/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile index 76674ad5833e..2474242f5a05 100644 --- a/fs/xfs/Makefile +++ b/fs/xfs/Makefile @@ -67,6 +67,7 @@ xfs-y += xfs_aops.o \ xfs_dir2_readdir.o \ xfs_discard.o \ xfs_error.o \ + xfs_exchrange.o \ xfs_export.o \ xfs_extent_busy.o \ xfs_file.o \ |