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| author | Kent Overstreet <kent.overstreet@linux.dev> | 2024-01-21 10:42:53 +0300 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-01-21 21:27:11 +0300 |
| commit | c6c4ff6507c4e1d32f9c2019795d4b7aa6eb559f (patch) | |
| tree | 18b47b480f4601a5a570cb5ed8865979e0021b4c /fs/bcachefs/subvolume_format.h | |
| parent | 8fed323b14040f42e5755bbb9bd778415634c4b6 (diff) | |
| download | linux-c6c4ff6507c4e1d32f9c2019795d4b7aa6eb559f.tar.xz | |
bcachefs: subvolume_format.h
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/subvolume_format.h')
| -rw-r--r-- | fs/bcachefs/subvolume_format.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/fs/bcachefs/subvolume_format.h b/fs/bcachefs/subvolume_format.h new file mode 100644 index 000000000000..af79134b07d6 --- /dev/null +++ b/fs/bcachefs/subvolume_format.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _BCACHEFS_SUBVOLUME_FORMAT_H +#define _BCACHEFS_SUBVOLUME_FORMAT_H + +#define SUBVOL_POS_MIN POS(0, 1) +#define SUBVOL_POS_MAX POS(0, S32_MAX) +#define BCACHEFS_ROOT_SUBVOL 1 + +struct bch_subvolume { + struct bch_val v; + __le32 flags; + __le32 snapshot; + __le64 inode; + /* + * Snapshot subvolumes form a tree, separate from the snapshot nodes + * tree - if this subvolume is a snapshot, this is the ID of the + * subvolume it was created from: + * + * This is _not_ necessarily the subvolume of the directory containing + * this subvolume: + */ + __le32 parent; + __le32 pad; + bch_le128 otime; +}; + +LE32_BITMASK(BCH_SUBVOLUME_RO, struct bch_subvolume, flags, 0, 1) +/* + * We need to know whether a subvolume is a snapshot so we can know whether we + * can delete it (or whether it should just be rm -rf'd) + */ +LE32_BITMASK(BCH_SUBVOLUME_SNAP, struct bch_subvolume, flags, 1, 2) +LE32_BITMASK(BCH_SUBVOLUME_UNLINKED, struct bch_subvolume, flags, 2, 3) + +#endif /* _BCACHEFS_SUBVOLUME_FORMAT_H */ |