mirror of
https://github.com/qemu/qemu.git
synced 2024-12-14 06:53:43 +08:00
Block layer patches:
- file-posix: Ignore unlock failure instead of crashing - gluster: Limit the transfer size to 512 MiB - stream: Fix backing chain freezing - qemu-img: Enable BDRV_REQ_MAY_UNMAP for zero writes in convert - iotests fixes -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJco1nvAAoJEH8JsnLIjy/WKSAP/AyAGt4DFbsfVq1SbX2MB/3F QtLi3q3Yjy71OaNyMJsqgd8dxoqO1bWKC7MmLxwFZwvwmXhgq7EVbJ6vJ7kzuHw5 FMsVavm61mL/vsKypFieYHbahiKC31R7sw4Vl7yeKG02oDgi/0SnIQxxO0rmIZxG Jx+p5tBDmrJ2WpgCWI0yr3VuYeJ/gJyw8la3Ubf1OzTBuTyfg94vSCsECX7GWm1w 0YkcRODct96mmqKCf6haHXQs9tTa6FnC9fsReenYcQg7nyqTttyXJz08fuqGQwWm sNcmMp2/YxAg2Z85Aq21fmTkXbGopEHtoC2fg71WET1DzpqMvvJPFBIOneBSzUon KHrZfZnziAzUESHDqenCQcHlbtWXxPY+7H0lojvhsLVzyEns6eLOSer093HqAh4s +av55+ucTUYRl9Uk8/vFPdFBh0bNJRJB2yazp0Fk5Yoo8y70TXePQ8ZkpjH9VSpb uQXy+FBc7LXYHB1KW/vhtuVoKgftbHi29rQ3imb9y6HYuJoJYZS9uGgrFpzF0YBN /mBG17YqE8Imfuavt0WQqNLSub/km9eqFrejnMqDBka1hZblecOB+3Ujcud5C7Vk HtKDdr2/Z+M1KApFMKhNZzEksXwhOVQ6VVZZfRGCjc/EXMOZ2gg8YlqOtotUzA0i vV2wMgpqE2Ihx1gIIqw/ =a4LV -----END PGP SIGNATURE----- Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging Block layer patches: - file-posix: Ignore unlock failure instead of crashing - gluster: Limit the transfer size to 512 MiB - stream: Fix backing chain freezing - qemu-img: Enable BDRV_REQ_MAY_UNMAP for zero writes in convert - iotests fixes # gpg: Signature made Tue 02 Apr 2019 13:47:43 BST # gpg: using RSA key 7F09B272C88F2FD6 # gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full] # Primary key fingerprint: DC3D EB15 9A9A F95D 3D74 56FE 7F09 B272 C88F 2FD6 * remotes/kevin/tags/for-upstream: tests/qemu-iotests/235: Allow fallback to tcg block: test block-stream with a base node that is used by block-commit block: freeze the backing chain earlier in stream_start() block: continue until base is found in bdrv_freeze_backing_chain() et al block/file-posix: do not fail on unlock bytes tests/qemu-iotests: Remove redundant COPYING file block/gluster: limit the transfer size to 512 MiB qemu-img: Enable BDRV_REQ_MAY_UNMAP in convert iotests: Fix test 200 on s390x without virtio-pci Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell
commit
9a363f0bcc
21
block.c
21
block.c
@ -4218,14 +4218,15 @@ BlockDriverState *bdrv_find_base(BlockDriverState *bs)
|
||||
/*
|
||||
* Return true if at least one of the backing links between @bs and
|
||||
* @base is frozen. @errp is set if that's the case.
|
||||
* @base must be reachable from @bs, or NULL.
|
||||
*/
|
||||
bool bdrv_is_backing_chain_frozen(BlockDriverState *bs, BlockDriverState *base,
|
||||
Error **errp)
|
||||
{
|
||||
BlockDriverState *i;
|
||||
|
||||
for (i = bs; i != base && i->backing; i = backing_bs(i)) {
|
||||
if (i->backing->frozen) {
|
||||
for (i = bs; i != base; i = backing_bs(i)) {
|
||||
if (i->backing && i->backing->frozen) {
|
||||
error_setg(errp, "Cannot change '%s' link from '%s' to '%s'",
|
||||
i->backing->name, i->node_name,
|
||||
backing_bs(i)->node_name);
|
||||
@ -4240,6 +4241,7 @@ bool bdrv_is_backing_chain_frozen(BlockDriverState *bs, BlockDriverState *base,
|
||||
* Freeze all backing links between @bs and @base.
|
||||
* If any of the links is already frozen the operation is aborted and
|
||||
* none of the links are modified.
|
||||
* @base must be reachable from @bs, or NULL.
|
||||
* Returns 0 on success. On failure returns < 0 and sets @errp.
|
||||
*/
|
||||
int bdrv_freeze_backing_chain(BlockDriverState *bs, BlockDriverState *base,
|
||||
@ -4251,8 +4253,10 @@ int bdrv_freeze_backing_chain(BlockDriverState *bs, BlockDriverState *base,
|
||||
return -EPERM;
|
||||
}
|
||||
|
||||
for (i = bs; i != base && i->backing; i = backing_bs(i)) {
|
||||
i->backing->frozen = true;
|
||||
for (i = bs; i != base; i = backing_bs(i)) {
|
||||
if (i->backing) {
|
||||
i->backing->frozen = true;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
@ -4261,14 +4265,17 @@ int bdrv_freeze_backing_chain(BlockDriverState *bs, BlockDriverState *base,
|
||||
/*
|
||||
* Unfreeze all backing links between @bs and @base. The caller must
|
||||
* ensure that all links are frozen before using this function.
|
||||
* @base must be reachable from @bs, or NULL.
|
||||
*/
|
||||
void bdrv_unfreeze_backing_chain(BlockDriverState *bs, BlockDriverState *base)
|
||||
{
|
||||
BlockDriverState *i;
|
||||
|
||||
for (i = bs; i != base && i->backing; i = backing_bs(i)) {
|
||||
assert(i->backing->frozen);
|
||||
i->backing->frozen = false;
|
||||
for (i = bs; i != base; i = backing_bs(i)) {
|
||||
if (i->backing) {
|
||||
assert(i->backing->frozen);
|
||||
i->backing->frozen = false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -815,6 +815,18 @@ static int raw_handle_perm_lock(BlockDriverState *bs,
|
||||
|
||||
switch (op) {
|
||||
case RAW_PL_PREPARE:
|
||||
if ((s->perm | new_perm) == s->perm &&
|
||||
(s->shared_perm & new_shared) == s->shared_perm)
|
||||
{
|
||||
/*
|
||||
* We are going to unlock bytes, it should not fail. If it fail due
|
||||
* to some fs-dependent permission-unrelated reasons (which occurs
|
||||
* sometimes on NFS and leads to abort in bdrv_replace_child) we
|
||||
* can't prevent such errors by any check here. And we ignore them
|
||||
* anyway in ABORT and COMMIT.
|
||||
*/
|
||||
return 0;
|
||||
}
|
||||
ret = raw_apply_lock_bytes(s, s->fd, s->perm | new_perm,
|
||||
~s->shared_perm | ~new_shared,
|
||||
false, errp);
|
||||
|
||||
@ -9,6 +9,7 @@
|
||||
*/
|
||||
|
||||
#include "qemu/osdep.h"
|
||||
#include "qemu/units.h"
|
||||
#include <glusterfs/api/glfs.h>
|
||||
#include "block/block_int.h"
|
||||
#include "block/qdict.h"
|
||||
@ -41,6 +42,12 @@
|
||||
#define GLUSTER_DEBUG_MAX 9
|
||||
#define GLUSTER_OPT_LOGFILE "logfile"
|
||||
#define GLUSTER_LOGFILE_DEFAULT "-" /* handled in libgfapi as /dev/stderr */
|
||||
/*
|
||||
* Several versions of GlusterFS (3.12? -> 6.0.1) fail when the transfer size
|
||||
* is greater or equal to 1024 MiB, so we are limiting the transfer size to 512
|
||||
* MiB to avoid this rare issue.
|
||||
*/
|
||||
#define GLUSTER_MAX_TRANSFER (512 * MiB)
|
||||
|
||||
#define GERR_INDEX_HINT "hint: check in 'server' array index '%d'\n"
|
||||
|
||||
@ -887,6 +894,11 @@ out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void qemu_gluster_refresh_limits(BlockDriverState *bs, Error **errp)
|
||||
{
|
||||
bs->bl.max_transfer = GLUSTER_MAX_TRANSFER;
|
||||
}
|
||||
|
||||
static int qemu_gluster_reopen_prepare(BDRVReopenState *state,
|
||||
BlockReopenQueue *queue, Error **errp)
|
||||
{
|
||||
@ -1544,6 +1556,7 @@ static BlockDriver bdrv_gluster = {
|
||||
.bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
|
||||
#endif
|
||||
.bdrv_co_block_status = qemu_gluster_co_block_status,
|
||||
.bdrv_refresh_limits = qemu_gluster_refresh_limits,
|
||||
.create_opts = &qemu_gluster_create_opts,
|
||||
.strong_runtime_opts = gluster_strong_open_opts,
|
||||
};
|
||||
@ -1574,6 +1587,7 @@ static BlockDriver bdrv_gluster_tcp = {
|
||||
.bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
|
||||
#endif
|
||||
.bdrv_co_block_status = qemu_gluster_co_block_status,
|
||||
.bdrv_refresh_limits = qemu_gluster_refresh_limits,
|
||||
.create_opts = &qemu_gluster_create_opts,
|
||||
.strong_runtime_opts = gluster_strong_open_opts,
|
||||
};
|
||||
@ -1604,6 +1618,7 @@ static BlockDriver bdrv_gluster_unix = {
|
||||
.bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
|
||||
#endif
|
||||
.bdrv_co_block_status = qemu_gluster_co_block_status,
|
||||
.bdrv_refresh_limits = qemu_gluster_refresh_limits,
|
||||
.create_opts = &qemu_gluster_create_opts,
|
||||
.strong_runtime_opts = gluster_strong_open_opts,
|
||||
};
|
||||
@ -1640,6 +1655,7 @@ static BlockDriver bdrv_gluster_rdma = {
|
||||
.bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
|
||||
#endif
|
||||
.bdrv_co_block_status = qemu_gluster_co_block_status,
|
||||
.bdrv_refresh_limits = qemu_gluster_refresh_limits,
|
||||
.create_opts = &qemu_gluster_create_opts,
|
||||
.strong_runtime_opts = gluster_strong_open_opts,
|
||||
};
|
||||
|
||||
@ -238,11 +238,16 @@ void stream_start(const char *job_id, BlockDriverState *bs,
|
||||
BlockDriverState *iter;
|
||||
bool bs_read_only;
|
||||
|
||||
if (bdrv_freeze_backing_chain(bs, base, errp) < 0) {
|
||||
return;
|
||||
}
|
||||
|
||||
/* Make sure that the image is opened in read-write mode */
|
||||
bs_read_only = bdrv_is_read_only(bs);
|
||||
if (bs_read_only) {
|
||||
if (bdrv_reopen_set_read_only(bs, false, errp) != 0) {
|
||||
return;
|
||||
bs_read_only = false;
|
||||
goto fail;
|
||||
}
|
||||
}
|
||||
|
||||
@ -269,11 +274,6 @@ void stream_start(const char *job_id, BlockDriverState *bs,
|
||||
&error_abort);
|
||||
}
|
||||
|
||||
if (bdrv_freeze_backing_chain(bs, base, errp) < 0) {
|
||||
job_early_fail(&s->common.job);
|
||||
goto fail;
|
||||
}
|
||||
|
||||
s->base = base;
|
||||
s->backing_file_str = g_strdup(backing_file_str);
|
||||
s->bs_read_only = bs_read_only;
|
||||
@ -288,4 +288,5 @@ fail:
|
||||
if (bs_read_only) {
|
||||
bdrv_reopen_set_read_only(bs, true, NULL);
|
||||
}
|
||||
bdrv_unfreeze_backing_chain(bs, base);
|
||||
}
|
||||
|
||||
@ -1756,7 +1756,8 @@ static int coroutine_fn convert_co_write(ImgConvertState *s, int64_t sector_num,
|
||||
}
|
||||
ret = blk_co_pwrite_zeroes(s->target,
|
||||
sector_num << BDRV_SECTOR_BITS,
|
||||
n << BDRV_SECTOR_BITS, 0);
|
||||
n << BDRV_SECTOR_BITS,
|
||||
BDRV_REQ_MAY_UNMAP);
|
||||
if (ret < 0) {
|
||||
return ret;
|
||||
}
|
||||
|
||||
@ -314,6 +314,23 @@ class TestParallelOps(iotests.QMPTestCase):
|
||||
|
||||
self.wait_until_completed(drive='commit-drive0')
|
||||
|
||||
# In this case the base node of the stream job is the same as the
|
||||
# top node of commit job. Since block-commit removes the top node
|
||||
# when it finishes, this is not allowed.
|
||||
def test_overlapping_4(self):
|
||||
self.assert_no_active_block_jobs()
|
||||
|
||||
# Commit from node2 into node0
|
||||
result = self.vm.qmp('block-commit', device='drive0', top=self.imgs[2], base=self.imgs[0])
|
||||
self.assert_qmp(result, 'return', {})
|
||||
|
||||
# Stream from node2 into node4
|
||||
result = self.vm.qmp('block-stream', device='node4', base_node='node2', job_id='node4')
|
||||
self.assert_qmp(result, 'error/class', 'GenericError')
|
||||
|
||||
self.wait_until_completed()
|
||||
self.assert_no_active_block_jobs()
|
||||
|
||||
# Test a block-stream and a block-commit job in parallel
|
||||
# Here the stream job is supposed to finish quickly in order to reproduce
|
||||
# the scenario that triggers the bug fixed in 3d5d319e1221 and 1a63a907507
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
........................
|
||||
.........................
|
||||
----------------------------------------------------------------------
|
||||
Ran 24 tests
|
||||
Ran 25 tests
|
||||
|
||||
OK
|
||||
|
||||
@ -52,13 +52,21 @@ ${QEMU_IMG} create -f $IMGFMT -F $IMGFMT "${TEST_IMG}" -b "${BACKING_IMG}" 512M
|
||||
|
||||
${QEMU_IO} -c "write -P 0xa5 512 300M" "${BACKING_IMG}" | _filter_qemu_io
|
||||
|
||||
case "$QEMU_DEFAULT_MACHINE" in
|
||||
s390-ccw-virtio)
|
||||
virtio_scsi="-device virtio-scsi-ccw,id=scsi0,iothread=iothread0"
|
||||
;;
|
||||
*)
|
||||
virtio_scsi="-device pci-bridge,id=bridge1,chassis_nr=1,bus=pci.0
|
||||
-device virtio-scsi-pci,bus=bridge1,addr=0x1f,id=scsi0,iothread=iothread0"
|
||||
;;
|
||||
esac
|
||||
|
||||
echo
|
||||
echo === Starting QEMU VM ===
|
||||
echo
|
||||
qemu_comm_method="qmp"
|
||||
_launch_qemu -device pci-bridge,id=bridge1,chassis_nr=1,bus=pci.0 \
|
||||
-object iothread,id=iothread0 \
|
||||
-device virtio-scsi-pci,bus=bridge1,addr=0x1f,id=scsi0,iothread=iothread0 \
|
||||
_launch_qemu -object iothread,id=iothread0 $virtio_scsi \
|
||||
-drive file="${TEST_IMG}",media=disk,if=none,cache=$CACHEMODE,id=drive_sysdisk,format=$IMGFMT \
|
||||
-device scsi-hd,drive=drive_sysdisk,bus=scsi0.0,id=sysdisk,bootindex=0
|
||||
h1=$QEMU_HANDLE
|
||||
|
||||
@ -49,7 +49,7 @@ qemu_img_create('-f', iotests.imgfmt, '-o', 'preallocation=metadata', disk,
|
||||
str(size))
|
||||
|
||||
vm = QEMUMachine(iotests.qemu_prog)
|
||||
vm.add_args('-machine', 'accel=kvm')
|
||||
vm.add_args('-machine', 'accel=kvm:tcg')
|
||||
if iotests.qemu_default_machine == 's390-ccw-virtio':
|
||||
vm.add_args('-no-shutdown')
|
||||
vm.add_args('-drive', 'id=src,file=' + disk)
|
||||
|
||||
@ -1,339 +0,0 @@
|
||||
GNU GENERAL PUBLIC LICENSE
|
||||
Version 2, June 1991
|
||||
|
||||
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
|
||||
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
Everyone is permitted to copy and distribute verbatim copies
|
||||
of this license document, but changing it is not allowed.
|
||||
|
||||
Preamble
|
||||
|
||||
The licenses for most software are designed to take away your
|
||||
freedom to share and change it. By contrast, the GNU General Public
|
||||
License is intended to guarantee your freedom to share and change free
|
||||
software--to make sure the software is free for all its users. This
|
||||
General Public License applies to most of the Free Software
|
||||
Foundation's software and to any other program whose authors commit to
|
||||
using it. (Some other Free Software Foundation software is covered by
|
||||
the GNU Lesser General Public License instead.) You can apply it to
|
||||
your programs, too.
|
||||
|
||||
When we speak of free software, we are referring to freedom, not
|
||||
price. Our General Public Licenses are designed to make sure that you
|
||||
have the freedom to distribute copies of free software (and charge for
|
||||
this service if you wish), that you receive source code or can get it
|
||||
if you want it, that you can change the software or use pieces of it
|
||||
in new free programs; and that you know you can do these things.
|
||||
|
||||
To protect your rights, we need to make restrictions that forbid
|
||||
anyone to deny you these rights or to ask you to surrender the rights.
|
||||
These restrictions translate to certain responsibilities for you if you
|
||||
distribute copies of the software, or if you modify it.
|
||||
|
||||
For example, if you distribute copies of such a program, whether
|
||||
gratis or for a fee, you must give the recipients all the rights that
|
||||
you have. You must make sure that they, too, receive or can get the
|
||||
source code. And you must show them these terms so they know their
|
||||
rights.
|
||||
|
||||
We protect your rights with two steps: (1) copyright the software, and
|
||||
(2) offer you this license which gives you legal permission to copy,
|
||||
distribute and/or modify the software.
|
||||
|
||||
Also, for each author's protection and ours, we want to make certain
|
||||
that everyone understands that there is no warranty for this free
|
||||
software. If the software is modified by someone else and passed on, we
|
||||
want its recipients to know that what they have is not the original, so
|
||||
that any problems introduced by others will not reflect on the original
|
||||
authors' reputations.
|
||||
|
||||
Finally, any free program is threatened constantly by software
|
||||
patents. We wish to avoid the danger that redistributors of a free
|
||||
program will individually obtain patent licenses, in effect making the
|
||||
program proprietary. To prevent this, we have made it clear that any
|
||||
patent must be licensed for everyone's free use or not licensed at all.
|
||||
|
||||
The precise terms and conditions for copying, distribution and
|
||||
modification follow.
|
||||
|
||||
GNU GENERAL PUBLIC LICENSE
|
||||
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
|
||||
|
||||
0. This License applies to any program or other work which contains
|
||||
a notice placed by the copyright holder saying it may be distributed
|
||||
under the terms of this General Public License. The "Program", below,
|
||||
refers to any such program or work, and a "work based on the Program"
|
||||
means either the Program or any derivative work under copyright law:
|
||||
that is to say, a work containing the Program or a portion of it,
|
||||
either verbatim or with modifications and/or translated into another
|
||||
language. (Hereinafter, translation is included without limitation in
|
||||
the term "modification".) Each licensee is addressed as "you".
|
||||
|
||||
Activities other than copying, distribution and modification are not
|
||||
covered by this License; they are outside its scope. The act of
|
||||
running the Program is not restricted, and the output from the Program
|
||||
is covered only if its contents constitute a work based on the
|
||||
Program (independent of having been made by running the Program).
|
||||
Whether that is true depends on what the Program does.
|
||||
|
||||
1. You may copy and distribute verbatim copies of the Program's
|
||||
source code as you receive it, in any medium, provided that you
|
||||
conspicuously and appropriately publish on each copy an appropriate
|
||||
copyright notice and disclaimer of warranty; keep intact all the
|
||||
notices that refer to this License and to the absence of any warranty;
|
||||
and give any other recipients of the Program a copy of this License
|
||||
along with the Program.
|
||||
|
||||
You may charge a fee for the physical act of transferring a copy, and
|
||||
you may at your option offer warranty protection in exchange for a fee.
|
||||
|
||||
2. You may modify your copy or copies of the Program or any portion
|
||||
of it, thus forming a work based on the Program, and copy and
|
||||
distribute such modifications or work under the terms of Section 1
|
||||
above, provided that you also meet all of these conditions:
|
||||
|
||||
a) You must cause the modified files to carry prominent notices
|
||||
stating that you changed the files and the date of any change.
|
||||
|
||||
b) You must cause any work that you distribute or publish, that in
|
||||
whole or in part contains or is derived from the Program or any
|
||||
part thereof, to be licensed as a whole at no charge to all third
|
||||
parties under the terms of this License.
|
||||
|
||||
c) If the modified program normally reads commands interactively
|
||||
when run, you must cause it, when started running for such
|
||||
interactive use in the most ordinary way, to print or display an
|
||||
announcement including an appropriate copyright notice and a
|
||||
notice that there is no warranty (or else, saying that you provide
|
||||
a warranty) and that users may redistribute the program under
|
||||
these conditions, and telling the user how to view a copy of this
|
||||
License. (Exception: if the Program itself is interactive but
|
||||
does not normally print such an announcement, your work based on
|
||||
the Program is not required to print an announcement.)
|
||||
|
||||
These requirements apply to the modified work as a whole. If
|
||||
identifiable sections of that work are not derived from the Program,
|
||||
and can be reasonably considered independent and separate works in
|
||||
themselves, then this License, and its terms, do not apply to those
|
||||
sections when you distribute them as separate works. But when you
|
||||
distribute the same sections as part of a whole which is a work based
|
||||
on the Program, the distribution of the whole must be on the terms of
|
||||
this License, whose permissions for other licensees extend to the
|
||||
entire whole, and thus to each and every part regardless of who wrote it.
|
||||
|
||||
Thus, it is not the intent of this section to claim rights or contest
|
||||
your rights to work written entirely by you; rather, the intent is to
|
||||
exercise the right to control the distribution of derivative or
|
||||
collective works based on the Program.
|
||||
|
||||
In addition, mere aggregation of another work not based on the Program
|
||||
with the Program (or with a work based on the Program) on a volume of
|
||||
a storage or distribution medium does not bring the other work under
|
||||
the scope of this License.
|
||||
|
||||
3. You may copy and distribute the Program (or a work based on it,
|
||||
under Section 2) in object code or executable form under the terms of
|
||||
Sections 1 and 2 above provided that you also do one of the following:
|
||||
|
||||
a) Accompany it with the complete corresponding machine-readable
|
||||
source code, which must be distributed under the terms of Sections
|
||||
1 and 2 above on a medium customarily used for software interchange; or,
|
||||
|
||||
b) Accompany it with a written offer, valid for at least three
|
||||
years, to give any third party, for a charge no more than your
|
||||
cost of physically performing source distribution, a complete
|
||||
machine-readable copy of the corresponding source code, to be
|
||||
distributed under the terms of Sections 1 and 2 above on a medium
|
||||
customarily used for software interchange; or,
|
||||
|
||||
c) Accompany it with the information you received as to the offer
|
||||
to distribute corresponding source code. (This alternative is
|
||||
allowed only for noncommercial distribution and only if you
|
||||
received the program in object code or executable form with such
|
||||
an offer, in accord with Subsection b above.)
|
||||
|
||||
The source code for a work means the preferred form of the work for
|
||||
making modifications to it. For an executable work, complete source
|
||||
code means all the source code for all modules it contains, plus any
|
||||
associated interface definition files, plus the scripts used to
|
||||
control compilation and installation of the executable. However, as a
|
||||
special exception, the source code distributed need not include
|
||||
anything that is normally distributed (in either source or binary
|
||||
form) with the major components (compiler, kernel, and so on) of the
|
||||
operating system on which the executable runs, unless that component
|
||||
itself accompanies the executable.
|
||||
|
||||
If distribution of executable or object code is made by offering
|
||||
access to copy from a designated place, then offering equivalent
|
||||
access to copy the source code from the same place counts as
|
||||
distribution of the source code, even though third parties are not
|
||||
compelled to copy the source along with the object code.
|
||||
|
||||
4. You may not copy, modify, sublicense, or distribute the Program
|
||||
except as expressly provided under this License. Any attempt
|
||||
otherwise to copy, modify, sublicense or distribute the Program is
|
||||
void, and will automatically terminate your rights under this License.
|
||||
However, parties who have received copies, or rights, from you under
|
||||
this License will not have their licenses terminated so long as such
|
||||
parties remain in full compliance.
|
||||
|
||||
5. You are not required to accept this License, since you have not
|
||||
signed it. However, nothing else grants you permission to modify or
|
||||
distribute the Program or its derivative works. These actions are
|
||||
prohibited by law if you do not accept this License. Therefore, by
|
||||
modifying or distributing the Program (or any work based on the
|
||||
Program), you indicate your acceptance of this License to do so, and
|
||||
all its terms and conditions for copying, distributing or modifying
|
||||
the Program or works based on it.
|
||||
|
||||
6. Each time you redistribute the Program (or any work based on the
|
||||
Program), the recipient automatically receives a license from the
|
||||
original licensor to copy, distribute or modify the Program subject to
|
||||
these terms and conditions. You may not impose any further
|
||||
restrictions on the recipients' exercise of the rights granted herein.
|
||||
You are not responsible for enforcing compliance by third parties to
|
||||
this License.
|
||||
|
||||
7. If, as a consequence of a court judgment or allegation of patent
|
||||
infringement or for any other reason (not limited to patent issues),
|
||||
conditions are imposed on you (whether by court order, agreement or
|
||||
otherwise) that contradict the conditions of this License, they do not
|
||||
excuse you from the conditions of this License. If you cannot
|
||||
distribute so as to satisfy simultaneously your obligations under this
|
||||
License and any other pertinent obligations, then as a consequence you
|
||||
may not distribute the Program at all. For example, if a patent
|
||||
license would not permit royalty-free redistribution of the Program by
|
||||
all those who receive copies directly or indirectly through you, then
|
||||
the only way you could satisfy both it and this License would be to
|
||||
refrain entirely from distribution of the Program.
|
||||
|
||||
If any portion of this section is held invalid or unenforceable under
|
||||
any particular circumstance, the balance of the section is intended to
|
||||
apply and the section as a whole is intended to apply in other
|
||||
circumstances.
|
||||
|
||||
It is not the purpose of this section to induce you to infringe any
|
||||
patents or other property right claims or to contest validity of any
|
||||
such claims; this section has the sole purpose of protecting the
|
||||
integrity of the free software distribution system, which is
|
||||
implemented by public license practices. Many people have made
|
||||
generous contributions to the wide range of software distributed
|
||||
through that system in reliance on consistent application of that
|
||||
system; it is up to the author/donor to decide if he or she is willing
|
||||
to distribute software through any other system and a licensee cannot
|
||||
impose that choice.
|
||||
|
||||
This section is intended to make thoroughly clear what is believed to
|
||||
be a consequence of the rest of this License.
|
||||
|
||||
8. If the distribution and/or use of the Program is restricted in
|
||||
certain countries either by patents or by copyrighted interfaces, the
|
||||
original copyright holder who places the Program under this License
|
||||
may add an explicit geographical distribution limitation excluding
|
||||
those countries, so that distribution is permitted only in or among
|
||||
countries not thus excluded. In such case, this License incorporates
|
||||
the limitation as if written in the body of this License.
|
||||
|
||||
9. The Free Software Foundation may publish revised and/or new versions
|
||||
of the General Public License from time to time. Such new versions will
|
||||
be similar in spirit to the present version, but may differ in detail to
|
||||
address new problems or concerns.
|
||||
|
||||
Each version is given a distinguishing version number. If the Program
|
||||
specifies a version number of this License which applies to it and "any
|
||||
later version", you have the option of following the terms and conditions
|
||||
either of that version or of any later version published by the Free
|
||||
Software Foundation. If the Program does not specify a version number of
|
||||
this License, you may choose any version ever published by the Free Software
|
||||
Foundation.
|
||||
|
||||
10. If you wish to incorporate parts of the Program into other free
|
||||
programs whose distribution conditions are different, write to the author
|
||||
to ask for permission. For software which is copyrighted by the Free
|
||||
Software Foundation, write to the Free Software Foundation; we sometimes
|
||||
make exceptions for this. Our decision will be guided by the two goals
|
||||
of preserving the free status of all derivatives of our free software and
|
||||
of promoting the sharing and reuse of software generally.
|
||||
|
||||
NO WARRANTY
|
||||
|
||||
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
|
||||
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
|
||||
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
|
||||
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
|
||||
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
|
||||
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
|
||||
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
|
||||
REPAIR OR CORRECTION.
|
||||
|
||||
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
|
||||
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
|
||||
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
|
||||
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
|
||||
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
|
||||
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
|
||||
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
|
||||
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
|
||||
POSSIBILITY OF SUCH DAMAGES.
|
||||
|
||||
END OF TERMS AND CONDITIONS
|
||||
|
||||
How to Apply These Terms to Your New Programs
|
||||
|
||||
If you develop a new program, and you want it to be of the greatest
|
||||
possible use to the public, the best way to achieve this is to make it
|
||||
free software which everyone can redistribute and change under these terms.
|
||||
|
||||
To do so, attach the following notices to the program. It is safest
|
||||
to attach them to the start of each source file to most effectively
|
||||
convey the exclusion of warranty; and each file should have at least
|
||||
the "copyright" line and a pointer to where the full notice is found.
|
||||
|
||||
<one line to give the program's name and a brief idea of what it does.>
|
||||
Copyright (C) <year> <name of author>
|
||||
|
||||
This program is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 2 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License along
|
||||
with this program; if not, write to the Free Software Foundation, Inc.,
|
||||
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
||||
|
||||
Also add information on how to contact you by electronic and paper mail.
|
||||
|
||||
If the program is interactive, make it output a short notice like this
|
||||
when it starts in an interactive mode:
|
||||
|
||||
Gnomovision version 69, Copyright (C) year name of author
|
||||
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
|
||||
This is free software, and you are welcome to redistribute it
|
||||
under certain conditions; type `show c' for details.
|
||||
|
||||
The hypothetical commands `show w' and `show c' should show the appropriate
|
||||
parts of the General Public License. Of course, the commands you use may
|
||||
be called something other than `show w' and `show c'; they could even be
|
||||
mouse-clicks or menu items--whatever suits your program.
|
||||
|
||||
You should also get your employer (if you work as a programmer) or your
|
||||
school, if any, to sign a "copyright disclaimer" for the program, if
|
||||
necessary. Here is a sample; alter the names:
|
||||
|
||||
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
|
||||
`Gnomovision' (which makes passes at compilers) written by James Hacker.
|
||||
|
||||
<signature of Ty Coon>, 1 April 1989
|
||||
Ty Coon, President of Vice
|
||||
|
||||
This General Public License does not permit incorporating your program into
|
||||
proprietary programs. If your program is a subroutine library, you may
|
||||
consider it more useful to permit linking proprietary applications with the
|
||||
library. If this is what you want to do, use the GNU Lesser General
|
||||
Public License instead of this License.
|
||||
Loading…
Reference in New Issue
Block a user