Btrfs-progs: add feature to get mininum size for resizing a fs/device

[platform/upstream/btrfs-progs.git] / Documentation / btrfs-filesystem.asciidoc

diff --git a/Documentation/btrfs-filesystem.asciidoc b/Documentation/btrfs-filesystem.asciidoc
index 31cd51b..2b34242 100644 (file)
--- a/Documentation/btrfs-filesystem.asciidoc
+++ b/Documentation/btrfs-filesystem.asciidoc
@@ -93,7 +93,7 @@ If a newlabel optional argument is passed, the label is changed.
 NOTE: the maximum allowable length shall be less than 256 chars
 
 // Some wording are extracted by the resize2fs man page
-*resize* [<devid>:][+/-]<size>[kKmMgGtTpPeE]|[<devid>:]max <path>::
+*resize* [<devid>:][+/-]<size>[kKmMgGtTpPeE]|[<devid>:]max|[<devid>:]get_min_size <path>::
 Resize a mounted filesystem identified by directory <path>. A particular device
 can be resized by specifying a <devid>.
 +
@@ -113,6 +113,8 @@ KiB, MiB, GiB, TiB, PiB, or EiB, respectively. Case does not matter.
 +
 If \'max' is passed, the filesystem will occupy all available space on the
 device devid.
+If \'get_min_size' is passed, return the minimum size the device can be
+shrunk to, without performing any resize operation.
 +
 The resize command does not manipulate the size of underlying
 partition.  If you wish to enlarge/reduce a filesystem, you must make sure you