I made Snapshot/subvolume listing feature.
This feature consists of two patches, for kernel(ioctl),
and for progs(btrfsctl). I send these two patches as response
of this mail soon.
New option '-l' is introduced to btrfsctl for listing.
If this option is specified, btrfsctl call new ioctl. New ioctl
searches root tree and enumerates subtrees. For each subtrees,
ioctl searches directory path to tree root, and enumerates
more descendant until no more subtree is found.
MANPAGE-like option description and examples are as follows.
OPTIONS
-l _file_
List all snapshot/subvolume directories under a tree
which _file_ belongs to.
EXAMPLES
# btrfsctl -l /work/btrfs
Base path = /work/btrfs/
No. Tree ID Subvolume Relative Path
1 256 ss1/
2 257 ss2/
3 258 svs1/ss1/
4 259 svs1/ss2/
5 260 svs2/ss1/
6 261 svs2/ss2/
7 262 ss3/
8 263 ss4/
9 264 sv_pool/
10 265 sv_pool/ss01/
11 266 sv_pool/ss02/
12 267 sv_pool/ss03/
13 268 sv_pool/ss04/
14 269 sv_pool/ss05/
15 270 sv_pool/ss06/
16 271 sv_pool/ss07/
17 272 sv_pool/ss08/
18 273 sv_pool/ss09/
19 274 sv_pool/ss10/
operation complete
Btrfs v0.19-9-gd67dad2
Regards,
taruisi
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