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| author | Dongsu Park | 2014-02-27 11:35:07 +0100 |
|---|---|---|
| committer | Karel Zak | 2014-04-18 12:49:39 +0200 |
| commit | 83cc932d7412cb9d23bf9f06a9a54c8566e1a788 (patch) | |
| tree | 45d2fbf9b7ac14d08d0f5bd66e44ddf2c8e1eda0 /sys-utils/fallocate.1 | |
| parent | libsmartcols: fix buffer usage (diff) | |
| download | kernel-qcow2-util-linux-83cc932d7412cb9d23bf9f06a9a54c8566e1a788.tar.gz kernel-qcow2-util-linux-83cc932d7412cb9d23bf9f06a9a54c8566e1a788.tar.xz kernel-qcow2-util-linux-83cc932d7412cb9d23bf9f06a9a54c8566e1a788.zip | |
fallocate: introduce an option -c to support COLLAPSE_RANGE
Introduce a new option -c (or --collapse-range) to support a new flag
FALLOC_FL_COLLAPSE_RANGE for fallocate(2). It will nullify a particular
range [offset, offset+len] by shifting extents beyond the range to the
beginning of the hole.
Cc: Lukas Czerner <lczerner@redhat.com>
Cc: Namjae Jeon <namjae.jeon@samsung.com>
Cc: Ashish Sangwan <a.sangwan@samsung.com>
Signed-off-by: Dongsu Park <dongsu.park@profitbricks.com>
Diffstat (limited to 'sys-utils/fallocate.1')
| -rw-r--r-- | sys-utils/fallocate.1 | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys-utils/fallocate.1 b/sys-utils/fallocate.1 index 8a3aa4fbe..634c595b4 100644 --- a/sys-utils/fallocate.1 +++ b/sys-utils/fallocate.1 @@ -6,6 +6,7 @@ fallocate \- preallocate or deallocate space to a file .B fallocate .RB [ \-n ] .RB [ \-p ] +.RB [ \-c ] .RB [ \-o .IR offset ] .B \-l @@ -54,6 +55,12 @@ implied. .IP You can think of this as doing a "\fBcp --sparse\fP" and renaming the dest file as the original, without the need for extra disk space. +.IP "\fB\-c, \-\-collapse-range\fP" +Collapse a particular file range to nullify the hole. Extents beyond the range +[offset, offset+length] will be shifted to the beginning of hole. Hence this +command does not leave a hole, while \fI\-\-punch-hole\fP leaves a hole +instead of shifting extents. Both offset and length should be aligned to +the block size of filesystem. .IP "\fB\-o, \-\-offset\fP \fIoffset\fP Specifies the beginning offset of the allocation, in bytes. .IP "\fB\-l, \-\-length\fP \fIlength\fP |