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WIP: Introduce new IOCTLs and their structs #9

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WIP: Introduce new IOCTLs and their structs #9

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02ad51a
ioct_h: Add new IOCTLs (up to 6.9)
casKd-dev Sep 26, 2024
60ba7d4
ioctl_h: introduce structs up to 6.9 (except the IOVEC structs)
casKd-dev Sep 26, 2024
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96 changes: 96 additions & 0 deletions ioctl_h.go
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Original file line number Diff line number Diff line change
Expand Up @@ -328,6 +328,37 @@ func (arg *btrfs_ioctl_ino_lookup_args) Name() string {
return string(arg.name[:n])
}

const _BTRFS_INO_LOOKUP_USER_PATH_MAX = (_BTRFS_INO_LOOKUP_PATH_MAX - _BTRFS_VOL_NAME_MAX - 1)

type btrfs_ioctl_ino_lookup_user_args struct {
dirid objectID // in
objectid objectID // in
name [_BTRFS_VOL_NAME_MAX]byte // out
path [_BTRFS_INO_LOOKUP_USER_PATH_MAX]byte // out
}

func (arg *btrfs_ioctl_ino_lookup_user_args) Name() string {
n := 0
for i, b := range arg.name {
if b == '\x00' {
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Could be replaced with bytes.IndexByte

n = i
break
}
}
return string(arg.name[:n])
}

func (arg *btrfs_ioctl_ino_lookup_user_args) Path() string {
n := 0
for i, b := range arg.path {
if b == '\x00' {
n = i
break
}
}
return string(arg.path[:n])
}

type btrfs_ioctl_search_key struct {
tree_id objectID // which root are we searching. 0 is the tree of tree roots
// keys returned will be >= min and <= max
Expand Down Expand Up @@ -562,6 +593,62 @@ type btrfs_ioctl_send_args struct {
_ [4]uint64 // in
}

const (
_BTRFS_VOL_NAME_MAX = 0xff
)

type btrfs_ioctl_get_subvol_info_args struct {
treeid objectID //
name [_BTRFS_VOL_NAME_MAX + 1]byte // out
parent_id objectID //
dirid objectID //
generation uint64 //
flags SubvolFlags //

uuid UUID //
parent_uuid UUID //
received_uuid UUID //

ctransid uint64 //
otransid uint64 //
stransid uint64 //
rtransid uint64 //

ctime btrfs_timespec_raw //
otime btrfs_timespec_raw //
stime btrfs_timespec_raw //
rtime btrfs_timespec_raw //

_ [8]uint64
}

func (arg *btrfs_ioctl_get_subvol_info_args) Name() string {
n := 0
for i, b := range arg.name {
if b == '\x00' {
n = i
break
}
}
return string(arg.name[:n])
}

const (
_BTRFS_MAX_ROOTREF_BUFFER_NUM = 0xff
)

type btrfs_ioctl_get_subvol_rootref_args struct {
min_treeid objectID

rootref [_BTRFS_MAX_ROOTREF_BUFFER_NUM]struct {
treeid objectID
dirid objectID
}
num_items uint8

_ [7]uint8
}

var (
_BTRFS_IOC_SNAP_CREATE = ioctl.IOW(ioctlMagic, 1, unsafe.Sizeof(btrfs_ioctl_vol_args{}))
_BTRFS_IOC_DEFRAG = ioctl.IOW(ioctlMagic, 2, unsafe.Sizeof(btrfs_ioctl_vol_args{}))
Expand Down Expand Up @@ -616,6 +703,15 @@ var (
_BTRFS_IOC_GET_FEATURES = ioctl.IOR(ioctlMagic, 57, unsafe.Sizeof(btrfs_ioctl_feature_flags{}))
_BTRFS_IOC_SET_FEATURES = ioctl.IOW(ioctlMagic, 57, unsafe.Sizeof([2]btrfs_ioctl_feature_flags{}))
_BTRFS_IOC_GET_SUPPORTED_FEATURES = ioctl.IOR(ioctlMagic, 57, unsafe.Sizeof([3]btrfs_ioctl_feature_flags{}))
_BTRFS_IOC_RM_DEV_V2 = ioctl.IOW(ioctlMagic, 58, unsafe.Sizeof(btrfs_ioctl_vol_args_v2{}))
_BTRFS_IOC_LOGICAL_INO_V2 = ioctl.IOWR(ioctlMagic, 59, unsafe.Sizeof(btrfs_ioctl_logical_ino_args{}))
_BTRFS_IOC_GET_SUBVOL_INFO = ioctl.IOR(ioctlMagic, 60, unsafe.Sizeof(btrfs_ioctl_get_subvol_info_args{}))
_BTRFS_IOC_GET_SUBVOL_ROOTREF = ioctl.IOWR(ioctlMagic, 61, unsafe.Sizeof(btrfs_ioctl_get_subvol_rootref_args{}))
_BTRFS_IOC_INO_LOOKUP_USER = ioctl.IOWR(ioctlMagic, 62, unsafe.Sizeof(btrfs_ioctl_ino_lookup_user_args{}))
_BTRFS_IOC_SNAP_DESTROY_V2 = ioctl.IOW(ioctlMagic, 63, unsafe.Sizeof(btrfs_ioctl_vol_args_v2{}))
// TODO: Requires IOVEC definitions
// _BTRFS_IOC_ENCODED_READ = ioctl.IOR(ioctlMagic, 64, unsafe.Sizeof(btrfs_ioctl_encoded_io_args{}))
// _BTRFS_IOC_ENCODED_WRITE = ioctl.IOW(ioctlMagic, 64, unsafe.Sizeof(btrfs_ioctl_encoded_io_args{}))
)

func iocSnapCreate(f *os.File, in *btrfs_ioctl_vol_args) error {
Expand Down