On Sun, Aug 23, 2020 at 09:50:06PM +0200, Filip Bozuta wrote:
> This series covers support for following btrfs ioctls
>
> *BTRFS_SUBVOL_CREATE *BTRFS_IOC_ADD_DEV
> *BTRFS_SUBVOL_SETFLAGS *BTRFS_IOC_RM_DEV
> *BTRFS_SUBVOL_GETFLAGS *BTRFS_IOC_DEV_INFO
> *BTRFS_GET_SUBVOL_INFO *BTRFS_IOC_GET_DEV_STATS
> *BTRFS_IOC_SNAP_CREATE *BTRFS_IOC_GET_FEATURES
> *BTRFS_IOC_SNAP_DESTROY *BTRFS_IOC_SET_FEATURES
> *BTRFS_IOC_SCAN_DEV *BTRFS_IOC_GET_SUPPORTED_FEATURES
> *BTRFS_IOC_DEFAULT_SUBVOL *BTRFS_IOC_QUOTA_RESCAN
> *BTRFS_IOC_GET_SUBVOL_ROOTREF *BTRFS_IOC_QUOTA_RESCAN_WAIT
> *BTRFS_IOC_QUOTA_CTL *BTRFS_IOC_SCRUB
> *BTRFS_IOC_QGROUP_CREATE *BTRFS_IOC_SCRUB_CANCEL
> *BTRFS_IOC_QGROUP_ASSIGN *BTRFS_IOC_SCRUB_PROGRESS
> *BTRFS_IOC_INO_PATHS *BTRFS_IOC_QGROUP_LIMIT
> *BTRFS_IOC_LOGICAL_INO *BTRFS_IOC_QUOTA_RESCAN_STATUS
> *BTRFS_IOC_LOGICAL_INO_V2
> *BTRFS_IOC_INO_LOOKUP_USER
> *BTRFS_IOC_INO_LOOKUP
>
> The functionalities of individual ioctls were described in this series
> patch commit messages. Since all of these ioctls are added in kernel
> version 3.9, their definitions in file 'linux-user/ioctls.h' are
> enwrapped in an #ifdef directive.
>
> Testing method:
>
> Mini test programs were written for these ioctls. These test programs
> can be found on a repositort which is located on the link:
> https://github.com/bozutaf/btrfs-tests
>
> These test programs were compiled (sometimes using cross compilers) for
> following architectures:
>
> * Intel 64-bit (little endian)
> * Power pc 32-bit (big endian)
> * Power pc 64-bit (big endian)
>
> The corresponding native programs were executed without using QEMU on
> an intel x86_64 host.
>
> All applicable compiled programs were in turn executed through QEMU
> and the results obtained were the same ones gotten for native
> execution.
>
> v2:
>
> * Merged two series in one 8 patch series
> * Changed target ioctl definitions from IOR/IOW/IOWR to IORU/IOWU/IOWRU
> * Fixed some thunk struct definitions
>
> v3:
>
> * Added some checks in fine 'syscall_types.h' to see whether the ioctls that
> use the defined thunk types are present. This is done to support systems
> that have older versions of 'btrfs.h' file or if the file is not present
> at all. This is neccesary as to not cause build errors as some structures
> depend on values which are defined in 'btrfs.h'.
>
> Filip Bozuta (8):
> linux-user: Add support for a group of btrfs ioctls used for
> subvolumes
> linux-user: Add support for a group of btrfs ioctls used for snapshots
> linux-user: Add support for btrfs ioctls used to manipulate with
> devices
> linux-user: Add support for btrfs ioctls used to get/set features
> linux-user: Add support for a group of btrfs inode ioctls
> linux-user: Add support for two btrfs ioctls used for subvolume
> linux-user: Add support for btrfs ioctls used to manage quota
> linux-user: Add support for btrfs ioctls used to scrub a filesystem
>
> configure | 9 ++
> linux-user/ioctls.h | 124 ++++++++++++++++++++++++++++
> linux-user/syscall.c | 3 +
> linux-user/syscall_defs.h | 37 +++++++++
> linux-user/syscall_types.h | 163 +++++++++++++++++++++++++++++++++++++
> 5 files changed, 336 insertions(+)
Tested-by: Daniel P. Berrangé <berrange@redhat.com>
This series solves a problem that Fedora has with creating btrfs volumes
inside a mock chroot using qemu-user.
Regards,
Daniel
--
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