Michael, can you apply this now that we merged FALLOC_FL_COLLAPSE_RANGE into the kernel tree? On Wed, Feb 19, 2014 at 01:39:53AM +0900, Namjae Jeon wrote: > From: Namjae Jeon <namjae.jeon@xxxxxxxxxxx> > > Update FALLOC_FL_COLLAPSE_RANGE flag in fallocate. > > Signed-off-by: Namjae Jeon <namjae.jeon@xxxxxxxxxxx> > Signed-off-by: Ashish Sangwan <a.sangwan@xxxxxxxxxxx> > --- > man2/fallocate.2 | 21 +++++++++++++++++++++ > 1 file changed, 21 insertions(+) > > diff --git a/man2/fallocate.2 b/man2/fallocate.2 > index b31bbde..06a0b0c 100644 > --- a/man2/fallocate.2 > +++ b/man2/fallocate.2 > @@ -1,5 +1,6 @@ > .\" Copyright (c) 2007 Silicon Graphics, Inc. All Rights Reserved > .\" Written by Dave Chinner <dgc@xxxxxxx> > +.\" Updated by Namjae Jeon <namjae.jeon@xxxxxxxxxxx> > .\" > .\" %%%LICENSE_START(GPLv2_ONELINE) > .\" May be distributed as per GNU General Public License version 2. > @@ -7,6 +8,7 @@ > .\" > .\" 2011-09-19: Added FALLOC_FL_PUNCH_HOLE > .\" 2011-09-19: Substantial restructuring of the page > +.\" 2014-02-19: Added FALLOC_FL_COLLAPSE_RANGE > .\" > .TH FALLOCATE 2 2014-01-24 "Linux" "Linux Programmer's Manual" > .SH NAME > @@ -124,6 +126,25 @@ Btrfs (since Linux 3.7) > .IP * > tmpfs (since Linux 3.5) > .\" commit 83e4fa9c16e4af7122e31be3eca5d57881d236fe > +.SS Collapsing file space > +Specifiying the > +.BR FALLOC_FL_COLLAPSE_RANGE > +flag in > +.I mode > +collpse space in the byte range starting at > +.I offset > +and continuing for > +.I len > +bytes. Within the specified range, it first de-allocates blocks and eliminates > +the hole created in this process by shifting data blocks into the hole. > + > +Different filesystem may implement different limitatios on the granularity of > +the operation. Most filesystem will limit operations to filesystem block size > +boundaries, but this boundary may be larger or smaller depending > +on the filesystem and/or the configuration of the filesystem or file. > + > +If filesystem has such limitation on granularity, It will return error(EINVAL). > + > .SH RETURN VALUE > On success, > .BR fallocate () > -- > 1.7.9.5 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html ---end quoted text--- -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
