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$(srcdir) is not needed for guestfs_c.c.
*.mli only exists in $(srcdir) and isn't found on "make install" otherwise
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This code modifies zero, zero-device, is-zero, is-zero-device.
zero and zero-device are modified so that if the blocks of the device
already contain zeroes, then we don't write zeroes. The reason for
this is to avoid unnecessarily making the underlying storage
non-sparse or (in the qcow2 case) growing it.
is-zero and is-zero-device are modified so that zero detection is
faster. This is a nice side effect of making the first change.
Since avoiding unnecessary zeroing involves reading the blocks before
writing them, whereas before we just blindly wrote, this can be
slower. As you can see from the tests below, in the case where the
disk is sparse, it actually turns out to be faster, because we avoid
allocating the underlying blocks.
However in the case where the disk is non-sparse and full of existing
data, it is much slower. There might be a case for an API flag to
adjust whether or not we perform the zero check. I did not add this
flag because it is unlikely that the caller would have enough
information to be able to set the flag correctly.
(Elapsed time in seconds)
Format Test case Before After
Raw Sparse 16.4 5.3
Preallocated zero 17.0 18.8
Preallocated random 16.0 41.3
Qcow2 preallocation=off 18.7 5.6
preallocation=metadata 17.4 5.8
The current code uses a fixed block size of 4K for reading and
writing. I also tried the same tests with a block size of 64K but it
didn't make any significant difference.
(Thanks to Federico Simoncelli for suggesting this change)
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(RHBZ#729887).
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This documents bug 592910.
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RHBZ#666578).
This is a comprehensive fix for the warnings from the old (and
obsolete) Perl inspection code. For a full description and
reproducer, see:
https://bugzilla.redhat.com/show_bug.cgi?id=678231#c5
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Previously any disk that had /autoexec.bat or /boot.ini or /ntldr
would be picked up as a candidate for a Windows root disk. If further
checking could not find any systemroot (eg. /windows) then this would
result in complete failure of inspection.
In particular, this got confused by Hp_recovery partitions which have
/autoexec.bat, but don't have a systemroot in one of the usual places
(they have /MiniNT instead).
What we do now is to properly investigate all possible systemroot
places before deciding this is a Windows systemroot, so the subsequent
failure cannot occur.
(Thanks to lorimar for reporting this bug).
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This avoids conflicts with the globally installed libguestfs
appliance, or lets us build in multiple local directories at the same
time without conflicts.
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This updates commit 60d5a50f4d3d9e2c2f5a7d42a6859de709bda3f6.
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These commands allow you to manipulate the environment within
guestfish.
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Calls to these functions are generated, so there is no need to declare
the functions by hand.
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It always has done. The documentation was wrong.
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This updates commit 319e946b92e175c05cdd1fdcb85c9b86f5631011.
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eg:
*stdin*:37: libguestfs: error: luks_close: Device lukstest is busy.
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This updates the previous two commits.
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We don't use this library (it is only used in the daemon),
but we need to add this to make the linker happy.
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Combine the two Gnulib instances together.
Add checks from old daemon/configure.ac into configure.ac.
Fix daemon/Makefile.am so it is like a normal subdirectory
Makefile.am.
Because we are now using the replacement strerror_r function from
Gnulib (instead of the one from glibc directly), this requires a small
change to src/guestfs.c.
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This was failing on Debian where $(SHELL) is the minimal dash shell.
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Related to RHBZ#727178.
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It's already included, but implicitly.
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The files could be listed in any order, resulting in the test failing
for no reason. Sort the output of tar.
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This is a fix for Perl 5.14.
See previous commit 5c3c7e8825341e18c9449976f8a321a04cc78d79.
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We weren't acquiring the GC lock around some allocations, resulting in
segfaults when an event callback ran at the same time as a main thread
allocation or garbage collection.
In particular this fixes a noticable crash in guestfs-browser.
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The documentation for the --csv option disappeared between 1.6 and 1.8
when we rewrote virt-df in C. Re-add it from 1.6 sources.
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This updates commit f173543fd207bdc254a5eb75180d82ef25eacae9.
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This function is like qemu_supports, but allows us to grep
the help text using regular expressions.
Note the function is not used yet.
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This library is widely available in distros.
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