* rename flags functions to scols_table_enable_*
* rename *_no_foo() functions to _nofoo()
* output formats are mutually exclusive, so don't use flags there
* don't assume symbols in scols_new_table(), use scols_table_set_symbols()
Signed-off-by: Karel Zak <kzak@redhat.com>
The option is unsupported since v2.23, let's cleanup man pages and
code to remove it at all.
Reported-by: "Dale R. Worley" <worley@alum.mit.edu>
Signed-off-by: Karel Zak <kzak@redhat.com>
Kernel aligns the device size, but the offset where the device starts
is not required to be aligned.
# losetup --offset 32 -f file.img
is just fine, the final size of the look device will be (in sectors)
(backing_file_size - offset) >> 9
so we have to do the same in userspace when we check for successful
set capacity ioctl.
Signed-off-by: Karel Zak <kzak@redhat.com>
Now we use LOOP_CTL_GET_FREE ioctl to ask for free device, for example
losetup -f foo.img
Unfortunately, losetup(8) allows to ask for specified device
losetup /dev/loop100 foo.img
and in this case we assume that the device already exists in the
system. This is incorrect, we should be able to use loop-control
LOOP_CTL_ADD ioctl to ask for the specified device.
Signed-off-by: Karel Zak <kzak@redhat.com>
The code is not paranoid enough, loopcxt_set_device() only set the
device name to loopdev struct, but it does not check if the device
really exists.
Signed-off-by: Karel Zak <kzak@redhat.com>
It's usually unnecessary as we compare devno and ino, but let's
use absolute paths for situations when it's necessary to compare
paths as strings.
Signed-off-by: Karel Zak <kzak@redhat.com>
I recently tried to mount an hfsplus file system from an image file with
a partition table by using the loop offset and sizelimit options to specify
the location of the file system.
hfsplus stores some metadata at a set offset from the end of the partition,
so it's sensitive to the device size reported by the kernel.
It worked with this:
But failed with this:
/dev/loop0: [0089]:2 (<imagefile>), offset 32768, sizelimit 102400000
/dev/loop1: [0089]:2 (<imagefile>), offset 32768, sizelimit 102400000
/proc/partitions shows the correct number of blocks to match the sizelimit.
But if I set a breakpoint in mount before the mount syscall, I could see:
102400000
102432768
The kernel loop driver will set the gendisk capacity of the device at
LOOP_SET_STATUS64 but won't sync it to the block device until one of two
conditions are met: All open file descriptors referring to the device are
closed (and it will sync when re-opened) or if the LOOP_SET_CAPACITY ioctl
is called to sync it. Since mount opens the device and passes it directly
to the mount syscall after LOOP_SET_STATUS64 without closing and reopening
it, the sizelimit argument is effectively ignroed. The capacity needs to
be synced immediately for it to work as expected.
This patch adds the LOOP_SET_CAPACITY call to loopctx_setup_device since
the device isn't yet released to the user, so it's safe to sync the capacity
immediately.
[kzak@redhat.com: - port to the current git HEAD,
- use uint64_t]
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
sys-utils/losetup.c:309:2: error: 'for' loop initial declarations are only allowed in C99 mode
sys-utils/losetup.c:374:2: error: 'for' loop initial declarations are only allowed in C99 mode
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
The --list --all is the default output:
# losetup
NAME SIZE OFFSET AUTOCLEAR RO BACK-FILE
/dev/loop0 0 0 0 0 /home/fs-images/swap.img
/dev/loop1 0 100 0 0 /home/fs-images/disk.img
[kzak@redhat.com: - default to --all if no device specified,
- cleanup column names (add BACK- prefix)
- add MAJ:MIN to of the loopdev device]
Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
kernel cryptoloop is deprecated since ages and support for cryptoloop
in util-linux is incomplete/broken.
- no password hashing
- last 8 bit of key are always set to zero
- no binary keys possible (stops reading key at \n and \0)
In the past some Distros added the above features with patches. So
remove cryptoloop support from util-linux completely to make sure
people won't try using it.
Signed-off-by: Ludwig Nussel <ludwig.nussel@suse.de>
Signed-off-by: Karel Zak <kzak@redhat.com>
"losetup --offset 10 --sizelimit 20 foo.img" was producing
a loop device with offset 20 and no sizelimit. Looks like a typo,
fix it.
Signed-off-by: Daniel Drake <dsd@laptop.org>
Benno Schulenberg
Karel Zak
Ondrej Oprala
Sami Kerola
Yuri Chornoivan
Jeff Mahoney
Ludwig Nussel
Daniel Drake