Where POSIX_FADV_SEQUENTIAL and HAVE_POSIX_FADVISE are not available it
is waste of resources to have variables that are meaningful only for
posix_fadvise(). Also initialize the variables immediately to correct
values, and since cachesz is never changed mark it read only.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Recent Linux kernel supports FALLOC_FL_ZERO_RANGE in fallocate(2).
This patch adds FALLOC_FL_ZERO_RANGE support to fallocate utility,
by introducing a new option -z|--zero-range.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
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>
Based on Pádraig Brady review:
* use is_nul() from coreutils rather then memcmp()
* always call skip_hole() (SEEK_DATA)
* fix possible overflows
Signed-off-by: Karel Zak <kzak@redhat.com>
It's more efficient to skip already known holes by SEEK_DATA (seek to
the next area with data).
Thanks to Pádraig Brady.
Signed-off-by: Karel Zak <kzak@redhat.com>
* don't use --length to specify hole size, always use stat.st_blksize
* use --offset and --length to specify offset within the file (like
another fallocate operations)
Signed-off-by: Karel Zak <kzak@redhat.com>
This option tries to detect chunk of '\0's and punch a hole, making the file
sparse in-place.
[kzak@redhat.com: - fix coding style, use xalloc.h and err.h]
Signed-off-by: Rodrigo Campos <rodrigo@sdfg.com.ar>
Signed-off-by: Karel Zak <kzak@redhat.com>
Future patches will add more calls to fallocate(), so it will be useful to have
all these tricks inside a function.
The error message when fallocate is not supported is slightly changed: the file
name is not printed as a prefix because is not available in the context of the
function. Also, to only print one of the two possible errors (as happens when
using directly exit()), an else clause was added.
Signed-off-by: Rodrigo Campos <rodrigo@sdfg.com.ar>
The functionality is already there, with --punch-hole, but the text was for the
preallocation case only.
Signed-off-by: Rodrigo Campos <rodrigo@sdfg.com.ar>
Recent Linux kernel supports FALLOC_FL_PUNCH_HOLE in fallocate(2).
This patch adds FALLOC_FL_PUNCH_HOLE support to fallocate utility,
by introducing a new option -p|--punch-hole.
[kzak@redhat.com: - fix merge conflict in fallocate.1]
Cc: Karel Zak <kzak@redhat.com>
Cc: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
Solaris lacks err, errx, warn and warnx. This also means the err.h header
doesn't exist. Removed err.h include from all files, and included err.h from
c.h instead if it exists, otherwise alternatives are provided.
Signed-off-by: Fabian Groffen <grobian@gentoo.org>
This patch replaces a few functions used throughout the source:
* Renames getnum (from schedutils) to strtol_or_err
* Moves strtosize (from lib/strtosize.c)
* Moves xstrncpy (from include/xstrncpy.h)
* Adds strnlen, strnchr and strndup if not available (remove it from libmount utils)
A few Makefile.am files were modified to compile accordingly along with trivial renaming
in schedutils source code.
Signed-off-by: Davidlohr Bueso <dave@gnu.org>
If linux/falloc.h does not exist, the build system still enables the
fallocate util, but ultimately fails when it tries to include the
header and use a define from it.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The fallocate(1) utility is used to preallocate blocks to a file.
This can be useful for virtual images, database files, testing, etc.
Normally we'd hope that various tools will start using preallocation
internally, but until then such a utility may be useful, and could be
scripted as well.
The original Eric's version is available at:
http://thread.gmane.org/gmane.linux.utilities.util-linux-ng/2490
This version:
- checks for fallocate glibc function and kernel syscall
- does not provide a fallback and does not call posix_fallocate()
- adds long options
- uses err.h for errro messages
- adds NLS support
- cleanups man page
Co-Author: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
Sami Kerola
Karel Zak
Bernhard Voelker
Pádraig Brady
Lukas Czerner
Dongsu Park
Rodrigo Campos
Cong Wang
Fabian Groffen
Davidlohr Bueso
Mike Frysinger