This reverts commit b1555acc2f.
It seems that the option is used by kernel guys to test kernel, so
let's keep the option in the blockdev(8) although it's almost useless
in userspace. All we need is to improve docs to make things more
obvious to end users.
Signed-off-by: Karel Zak <kzak@redhat.com>
This option has never worked. If you try setting the block size on a
block device, and then read it using --getbsz, you will see that the
block size never changes.
The reason for this is because the block size is specific to the
current file descriptor opening the block device, so the change of
block size only persists for as long as blockdev has the device open,
and is lost once blockdev exits.
Also the block size is not really used anywhere. Filesystems, for
example, have their own idea of block size and ignore this setting
completely.
(Thanks Masayoshi Mizuma for diagnosing the problem)
Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
The option is also accepted in format `-h'. As a side effect
usage function is now able to return success, and since it had to
be touched the printing is cleaned up.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Use spaces in usage text instead of tabs and reduce the distance between
option names and descriptions.
This helps to minimize problems due to limited number of columns and
translated texts which take up more space than English.
Signed-off-by: Francesco Cosoleto <cosoleto@gmail.com>
new options:
--getpbsz get physical block (sector) size
--getiomin get minimum I/O size
--getioopt get optimal I/O size
--getalignoff get alignment offset
--getmaxsect get max sectors per request
Signed-off-by: Karel Zak <kzak@redhat.com>
This patch replaces duplicate code with blkdev_ functions from
lib/blkdev.c.
The patch also fix the output from "blockdev --report". The Size field
was in 512-byte sectors instead in real size in bytes.
Signed-off-by: Karel Zak <kzak@redhat.com>
Gettextize three new strings, make two strings indentical to two others,
and gettextize three strings that are already gettextized elsewhere.
Signed-off-by: Benno Schulenberg <bensberg@justemail.net>
Signed-off-by: Karel Zak <kzak@redhat.com>
The "blkockdev --getsize" returns negative numbers on i386
for 1Tb devices. The BLKGETSIZE and BLKGETSIZE64 have to
use unsigned long and unsigned long long.
$ blockdev --getsize /dev/mapper/huge
-2147483648
Signed-off-by: Karel Zak <kzak@redhat.com>
The "blockdev --getsz" command doesn't try to use BLKGETSIZE64 when
previous BLKGETSIZE failed with EFBIG. This patch fixes this problem.
Signed-off-by: Karel Zak <kzak@redhat.com>
In Linux 2.6 the BLKRASET ioctl has the desired effect for mounted
file-systems. In Linux 2.4 it appears to set the number of blocks to
read-ahead on the *device* as opposed to within a *file*, and the
maximum value of this number is 255. As a result the invocation of
blockdev will fail on Linux 2.4 for any usefully large value of
READAHEAD, and will not in any case have the desired affect for
fragmented files.
(Based on the blockdev-getfra-setfra.patch Debian patch.)
Signed-off-by: Karel Zak <kzak@redhat.com>