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btrfs-ioctl(3)
================
NAME
----
btrfs-ioctl - documentation for the ioctl interface to btrfs
DATA STRUCTURES AND DEFINITIONS
-------------------------------
[verse]
struct btrfs_ioctl_vol_args {
__s64 fd;
char name[BTRFS_PATH_NAME_MAX + 1];
};
[verse]
struct btrfs_ioctl_vol_args_v2 {
\__s64 fd;
\__u64 transid;
\__u64 flags;
union {
struct {
\__u64 size;
struct btrfs_qgroup_inherit \__user *qgroup_inherit;
};
__u64 unused[4];
};
char name[BTRFS_SUBVOL_NAME_MAX + 1];
};
[verse]
BTRFS_SUBVOL_NAME_MAX = 4039
BTRFS_PATH_NAME_MAX = 4087
LIST OF IOCTLS
--------------
BTRFS_IOC_SUBVOL_CREATE -- (obsolete) create a subvolume
BTRFS_IOC_SNAP_CREATE
BTRFS_IOC_DEFRAG
BTRFS_IOC_RESIZE
BTRFS_IOC_SCAN_DEV
BTRFS_IOC_TRANS_START
BTRFS_IOC_TRANS_END
BTRFS_IOC_SYNC
BTRFS_IOC_CLONE
BTRFS_IOC_ADD_DEV
BTRFS_IOC_RM_DEV
BTRFS_IOC_BALANCE
BTRFS_IOC_CLONE_RANGE
BTRFS_IOC_SUBVOL_CREATE
BTRFS_IOC_SNAP_DESTROY
BTRFS_IOC_DEFRAG_RANGE
BTRFS_IOC_TREE_SEARCH
BTRFS_IOC_TREE_SEARCH_V2
BTRFS_IOC_INO_LOOKUP
BTRFS_IOC_DEFAULT_SUBVOL
BTRFS_IOC_SPACE_INFO
BTRFS_IOC_START_SYNC
BTRFS_IOC_WAIT_SYNC
BTRFS_IOC_SNAP_CREATE_V2
BTRFS_IOC_SUBVOL_CREATE_V2 -- create a subvolume
BTRFS_IOC_SUBVOL_GETFLAGS
BTRFS_IOC_SUBVOL_SETFLAGS
BTRFS_IOC_SCRUB
BTRFS_IOC_SCRUB_CANCEL
BTRFS_IOC_SCRUB_PROGRESS
BTRFS_IOC_DEV_INFO
BTRFS_IOC_FS_INFO
BTRFS_IOC_BALANCE_V2
BTRFS_IOC_BALANCE_CTL
BTRFS_IOC_BALANCE_PROGRESS
BTRFS_IOC_INO_PATHS
BTRFS_IOC_LOGICAL_INO
BTRFS_IOC_SET_RECEIVED_SUBVOL
BTRFS_IOC_SEND
BTRFS_IOC_DEVICES_READY
BTRFS_IOC_QUOTA_CTL
BTRFS_IOC_QGROUP_ASSIGN
BTRFS_IOC_QGROUP_CREATE
BTRFS_IOC_QGROUP_LIMIT
BTRFS_IOC_QUOTA_RESCAN
BTRFS_IOC_QUOTA_RESCAN_STATUS
BTRFS_IOC_QUOTA_RESCAN_WAIT
BTRFS_IOC_GET_FSLABEL
BTRFS_IOC_SET_FSLABEL
BTRFS_IOC_GET_DEV_STATS
BTRFS_IOC_DEV_REPLACE
BTRFS_IOC_FILE_EXTENT_SAME
BTRFS_IOC_GET_FEATURES
BTRFS_IOC_SET_FEATURES
BTRFS_IOC_GET_SUPPORTED_FEATURES
DETAILED DESCRIPTION
--------------------
BTRFS_IOC_SUBVOL_CREATE
~~~~~~~~~~~~~~~~~~~~~~~
NOTE: obsoleted by BTRFS_IOC_SUBVOL_CREATE_V2
_(since: 3.0, obsoleted: 4.0)_ Create a subvolume.
ioctl fd:: file descriptor of the parent directory of the new subvolume
argument:: struct btrfs_ioctl_vol_args
fd:: ignored
name:: name of the subvolume, although the buffer can be almost 4k, the file
size is limited by linux VFS to 255 characters and must not contain a slash
('/')
BTRFS_IOC_SUBVOL_CREATE_V2
~~~~~~~~~~~~~~~~~~~~~~~~~~
NOTE: obsoletes BTRFS_IOC_SUBVOL_CREATE
_(since: 3.6)_ Create a subvolume, qgroup inheritance can be specified.
ioctl fd:: file descriptor of the parent directory of the new subvolume
argument:: struct btrfs_ioctl_vol_args_v2
fd:: ignored
transid:: ignored
flags:: ignored
size:: ...
qgroup_inherit:: ...
name:: name of the subvolume, although the buffer can be almost 4k, the file
size is limited by linux VFS to 255 characters and must not contain a slash
('/')
devid:: ...
AVAILABILITY
------------
*btrfs* is part of btrfs-progs.
Please refer to the btrfs wiki http://btrfs.wiki.kernel.org for
further details.
SEE ALSO
--------
`ioctl`(2)
|
