Module for managing BTRFS file systems.

salt.modules.btrfs.add(mountpoint, *devices, **kwargs)

Add a devices to a BTRFS filesystem.

General options:

  • nodiscard: Do not perform whole device TRIM
  • force: Force overwrite existing filesystem on the disk

CLI Example:

salt '*' btrfs.add /mountpoint /dev/sda1 /dev/sda2
salt.modules.btrfs.convert(device, permanent=False, keeplf=False)

Convert ext2/3/4 to BTRFS. Device should be mounted.

Filesystem can be converted temporarily so the further processing and rollback is possible, or permanently, where previous extended filesystem image gets deleted. Please note, permanent conversion takes a while as BTRFS filesystem needs to be properly rebalanced afterwards.

General options:

  • permanent: Specify if the migration should be permanent (false by default)

  • keeplf: Keep lost+found of the partition (removed by default,

    but still in the image, if not permanent migration)

CLI Example:

salt '*' btrfs.convert /dev/sda1
salt '*' btrfs.convert /dev/sda1 permanent=True

Defragment mounted BTRFS filesystem. In order to defragment a filesystem, device should be properly mounted and writable.

If passed a device name, then defragmented whole filesystem, mounted on in. If passed a moun tpoint of the filesystem, then only this mount point is defragmented.

CLI Example:

salt '*' btrfs.defragment /dev/sda1
salt '*' btrfs.defragment /path/on/filesystem
salt.modules.btrfs.delete(mountpoint, *devices, **kwargs)

Remove devices from a BTRFS filesystem.

CLI Example:

salt '*' btrfs.delete /mountpoint /dev/sda1 /dev/sda2

Get known BTRFS formatted devices on the system.

CLI Example:

salt '*' btrfs.devices

List currently available BTRFS features.

CLI Example:

salt '*' btrfs.mkfs_features

Get BTRFS filesystem information.

CLI Example:

salt '*' /dev/sda1
salt.modules.btrfs.mkfs(*devices, **kwargs)

Create a file system on the specified device. By default wipes out with force.

General options:

  • allocsize: Specify the BTRFS offset from the start of the device.
  • bytecount: Specify the size of the resultant filesystem.
  • nodesize: Node size.
  • leafsize: Specify the nodesize, the tree block size in which btrfs stores data.
  • noforce: Prevent force overwrite when an existing filesystem is detected on the device.
  • sectorsize: Specify the sectorsize, the minimum data block allocation unit.
  • nodiscard: Do not perform whole device TRIM operation by default.
  • uuid: Pass UUID or pass True to generate one.


  • dto: (raid0|raid1|raid5|raid6|raid10|single|dup)

    Specify how the data must be spanned across the devices specified.

  • mto: (raid0|raid1|raid5|raid6|raid10|single|dup)

    Specify how metadata must be spanned across the devices specified.

  • fts: Features (call salt <host> btrfs.features for full list of available features)

See the mkfs.btrfs(8) manpage for a more complete description of corresponding options description.

CLI Example:

salt '*' btrfs.mkfs /dev/sda1
salt '*' btrfs.mkfs /dev/sda1 noforce=True, type=None, set=None)

List properties for given btrfs object. The object can be path of BTRFS device, mount point, or any directories/files inside the BTRFS filesystem.

General options:

  • type: Possible types are s[ubvol], f[ilesystem], i[node] and d[evice].
  • force: Force overwrite existing filesystem on the disk
  • set: <key=value,key1=value1...> Options for a filesystem properties.

CLI Example:

salt '*' /mountpoint
salt '*' /dev/sda1 type=subvol set='ro=false,label="My Storage"'
salt.modules.btrfs.resize(mountpoint, size)

Resize filesystem.

General options:

  • mountpoint: Specify the BTRFS mountpoint to resize.
  • size: ([+/-]<newsize>[kKmMgGtTpPeE]|max) Specify the new size of the target.

CLI Example:

salt '*' btrfs.resize /mountpoint size=+1g
salt '*' btrfs.resize /dev/sda1 size=max
salt.modules.btrfs.subvolume_create(name, dest=None, qgroupids=None)

Create subvolume name in dest.

Return True if the subvolume is created, False is the subvolume is already there.

Name of the new subvolume
If not given, the subvolume will be created in the current directory, if given will be in /dest/name
Add the newly created subcolume to a qgroup. This parameter is a list

CLI Example:

salt '*' btrfs.subvolume_create var
salt '*' btrfs.subvolume_create var dest=/mnt
salt '*' btrfs.subvolume_create var qgroupids='[200]'
salt.modules.btrfs.subvolume_delete(name=None, names=None, commit=None)

Delete the subvolume(s) from the filesystem

The user can remove one single subvolume (name) or multiple of then at the same time (names). One of the two parameters needs to specified.

Please, refer to the documentation to understand the implication on the transactions, and when the subvolume is really deleted.

Return True if the subvolume is deleted, False is the subvolume was already missing.

Name of the subvolume to remove
List of names of subvolumes to remove
  • 'after': Wait for transaction commit at the end
  • 'each': Wait for transaction commit after each delete

CLI Example:

salt '*' btrfs.subvolume_delete /var/volumes/tmp
salt '*' btrfs.subvolume_delete /var/volumes/tmp commit=after

Check if a subvolume is present in the filesystem.

Mount point for the subvolume (full path)

CLI Example:

salt '*' btrfs.subvolume_exists /mnt/var
salt.modules.btrfs.subvolume_find_new(name, last_gen)

List the recently modified files in a subvolume

Name of the subvolume
Last transid marker from where to compare

CLI Example:

salt '*' btrfs.subvolume_find_new /var/volumes/tmp 1024

Get the default subvolume of the filesystem path

Mount point for the subvolume

CLI Example:

salt '*' btrfs.subvolume_get_default /var/volumes/tmp
salt.modules.btrfs.subvolume_list(path, parent_id=False, absolute=False, ogeneration=False, generation=False, subvolumes=False, uuid=False, parent_uuid=False, sent_subvolume_uuid=False, snapshots=False, readonly=False, deleted=False, generation_cmp=None, ogeneration_cmp=None, sort=None)

List the subvolumes present in the filesystem.

Mount point for the subvolume
Print parent ID
Print all the subvolumes in the filesystem and distinguish between absolute and relative path with respect to the given <path>
Print the ogeneration of the subvolume
Print the generation of the subvolume
Print only subvolumes below specified <path>
Print the UUID of the subvolume
Print the parent uuid of subvolumes (and snapshots)
Print the UUID of the sent subvolume, where the subvolume is the result of a receive operation
Only snapshot subvolumes in the filesystem will be listed
Only readonly subvolumes in the filesystem will be listed
Only deleted subvolumens that are ye not cleaned
List subvolumes in the filesystem that its generation is >=, <= or = value. '+' means >= value, '-' means <= value, If there is neither '+' nor '-', it means = value
List subvolumes in the filesystem that its ogeneration is >=, <= or = value
List subvolumes in order by specified items. Possible values: * rootid * gen * ogen * path You can add '+' or '-' in front of each items, '+' means ascending, '-' means descending. The default is ascending. You can combite it in a list.

CLI Example:

salt '*' btrfs.subvolume_list /var/volumes/tmp
salt '*' btrfs.subvolume_list /var/volumes/tmp path=True
salt '*' btrfs.subvolume_list /var/volumes/tmp sort='[-rootid]'
salt.modules.btrfs.subvolume_set_default(subvolid, path)

Set the subvolume as default

ID of the new default subvolume
Mount point for the filesystem

CLI Example:

salt '*' btrfs.subvolume_set_default 257 /var/volumes/tmp

Show information of a given subvolume

Mount point for the filesystem

CLI Example:

salt '*' btrfs.subvolume_show /var/volumes/tmp
salt.modules.btrfs.subvolume_snapshot(source, dest=None, name=None, read_only=False)

Create a snapshot of a source subvolume

Source subvolume from where to create the snapshot
If only dest is given, the subvolume will be named as the basename of the source
Name of the snapshot
Create a read only snapshot

CLI Example:

salt '*' btrfs.subvolume_snapshot /var/volumes/tmp dest=/.snapshots
salt '*' btrfs.subvolume_snapshot /var/volumes/tmp name=backup
salt.modules.btrfs.subvolume_sync(path, subvolids=None, sleep=None)

Wait until given subvolume are completely removed from the filesystem after deletion.

Mount point for the filesystem
List of IDs of subvolumes to wait for
Sleep N seconds betwenn checks (default: 1)

CLI Example:

salt '*' btrfs.subvolume_sync /var/volumes/tmp
salt '*' btrfs.subvolume_sync /var/volumes/tmp subvolids='[257]'

Show in which disk the chunks are allocated.

CLI Example:

salt '*' btrfs.usage /your/mountpoint

Return BTRFS version.

CLI Example:

salt '*' btrfs.version