changelog:
v3 -> v4
- call btrfs_next_leaf() after btrfs_search_slot() when the slot
position exceeds the number of items
- rebased to current misc-next
v2 -> v3
- fix kbuild test bot warning
v1 -> v2
- completely reimplement 1st/2nd ioctl to have user friendly api
- various cleanup, remove unnecessary goto
===
This adds three new unprivileged ioctls:
1st patch:
ioctl which returns subvolume information of ROOT_ITEM and ROOT_BACKREF
2nd patch:
ioctl which returns subvolume information of ROOT_REF (without subvolume name)
3rd patch:
user version of ino_lookup ioctl which also performs permission check.
They will be used to implement user version of "subvolume list/show" etc.
in user tools.
See each commit log for more detals.
The implementation of btrfs-progs can be found in the ML titled as follows:
[PATCH 0/11] btrfs-progs: Rework of "subvolume list/show" and relax the root
privileges of them
Tomohiro Misono (3):
btrfs: Add unprivileged ioctl which returns subvolume information
btrfs: Add unprivileged ioctl which returns subvolume's ROOT_REF
btrfs: Add unprivileged version of ino_lookup ioctl
fs/btrfs/ioctl.c | 435 +++++++++++++++++++++++++++++++++++++++++++++
include/uapi/linux/btrfs.h | 84 +++++++++
2 files changed, 519 insertions(+)
--
2.14.3
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