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btrfs_ioc_snap_getflags
2010 Nov 30
1
R: Re: [PATCH 5/5] btrfs: Add ioctl to set snapshot readonly/writable
...So I am suggesting to develop a more general
interface for future improvement. These pair of functions (*_set/get) should
be use to
set the subvolume/snapshot properties. And the RDONLY is one of them.
In the detail to set an attributue an user should be:
- get the subvolume flags (ioctl(fd, BTRFS_IOC_SNAP_GETFLAGS....) )
- compute the new flags ( flags |= BTRFS_FLAGS_XXXX or flags &=
~BTRFS_FLAG_XXXX)
- set the subvolume flags (ioctl(fd, BTRFS_IOC_SNAP_SGETFLAGS....) )
>
>- It seems to me there''s no user requirement for getflags ioctl to
>return _RDONLY/_WRITABLE flags of a tree root...