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2012-11-28iscsi: do not assume device is zero initializedPeter Lieven1-0/+6
Without any complex checks we can't assume that an iscsi target is initialized to zero. Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-28iscsi: fix deadlock during loginPeter Lieven1-181/+70
If the connection is interrupted before the first login is successfully completed qemu-kvm is waiting forever in qemu_aio_wait(). This is fixed by performing an sync login to the target. If the connection breaks after the first successful login errors are handled internally by libiscsi. Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-28iscsi: fix segfault in url parsingPeter Lieven1-2/+1
If an invalid URL is specified iscsi_get_error(iscsi) is called with iscsi == NULL. Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-21use int64_t for return values from rbd instead of intStefan Priebe1-2/+2
rbd / rados tends to return pretty often length of writes or discarded blocks. These values might be bigger than int. The steps to reproduce are: mkfs.xfs -f a whole device bigger than int in bytes. mkfs.xfs sends a discard. Important is that you use scsi-hd and set discard_granularity=512. Otherwise rbd disabled discard support. Signed-off-by: Stefan Priebe <s.priebe@profihost.ag> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2012-11-21vdi: don't override libuuid symbolsStefan Hajnoczi1-6/+3
It's poor symbol hygiene to provide a global symbols that collide with a common library like libuuid. If QEMU links against a shared library that depends on uuid_generate() it can end up calling our stub version of the function. This exact scenario happened with GlusterFS libgfapi.so, which depends on libglusterfs.so's uuid_generate(). Scope the uuid stubs for vdi.c only and avoid affecting other shared objects. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com>
2012-11-21block: add bdrv_reopen() support for raw hdev, floppy, and cdromJeff Cody1-0/+16
For hdev, floppy, and cdrom, the reopen() handlers are the same as for the file reopen handler. For floppy and cdrom types, however, we keep O_NONBLOCK, as in the _open function. Signed-off-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2012-11-14vmdk: Fix data corruption bug in WRITE and READ handlingGerhard Wiesinger1-2/+8
Fixed a MAJOR BUG in VMDK files on file boundaries on reads and ALSO ON WRITES WHICH MIGHT CORRUPT THE IMAGE AND DATA!!!!!! Triggered for example with the following VMDK file (partly listed): RW 4193792 FLAT "XP-W1-f001.vmdk" 0 RW 2097664 FLAT "XP-W1-f002.vmdk" 0 RW 4193792 FLAT "XP-W1-f003.vmdk" 0 RW 512 FLAT "XP-W1-f004.vmdk" 0 RW 4193792 FLAT "XP-W1-f005.vmdk" 0 RW 2097664 FLAT "XP-W1-f006.vmdk" 0 RW 4193792 FLAT "XP-W1-f007.vmdk" 0 RW 512 FLAT "XP-W1-f008.vmdk" 0 Patch includes: 1.) Patch fixes wrong calculation on extent boundaries. Especially it fixes the relativeness of the sector number to the current extent. Verfied correctness with: 1.) Converted either with Virtualbox to VDI and then with qemu-img and then with qemu-img only: VBoxManage clonehd --format vdi /VM/XP-W/new/XP-W1.vmdk ~/.VirtualBox/Harddisks/XP-W1-new-test.vdi ./qemu-img convert -O raw ~/.VirtualBox/Harddisks/XP-W1-new-test.vdi /root/QEMU/VM-XP-W1/XP-W1-via-VBOX.img md5sum /root/QEMU/VM-XP-W/XP-W1-direct.img md5sum /root/QEMU/VM-XP-W/XP-W1-via-VBOX.img => same MD5 hash 2.) Verified debug log files 3.) Run Windows XP successfully 4.) chkdsk run successfully without any errors Signed-off-by: Gerhard Wiesinger <lists@wiesinger.com> Acked-by: Fam Zheng <famcool@gmail.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-11-14aio: rename AIOPool to AIOCBInfoStefan Hajnoczi10-25/+25
Now that AIOPool no longer keeps a freelist, it isn't really a "pool" anymore. Rename it to AIOCBInfo and make it const since it no longer needs to be modified. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-11-14block: Workaround for older versions of MinGW gccStefan Weil1-5/+5
Versions before gcc-4.6 don't support unnamed fields in initializers (see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=10676). Offset and OffsetHigh belong to an unnamed struct which is part of an unnamed union. Therefore the original code does not work with older versions of gcc. Signed-off-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-11-14qcow2: Fix refcount table size calculationKevin Wolf1-1/+2
A missing factor for the refcount table entry size in the calculation could mean that too little memory was allocated for the in-memory representation of the table, resulting in a buffer overflow. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Michael Tokarev <mjt@tls.msk.ru> Tested-by: Michael Tokarev <mjt@tls.msk.ru>
2012-11-12nbd: accept URIsPaolo Bonzini1-1/+97
The URI syntax is consistent with the Gluster syntax. Export names are specified in the path, preceded by one or more (otherwise unused) slashes. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-12nbd: accept relative path to Unix socketPaolo Bonzini1-10/+7
Adding the "is_unix" member now will simplify the parsing of NBD URIs. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-31Merge remote-tracking branch 'origin/master' into threadpoolPaolo Bonzini4-12/+326
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-31raw-win32: implement native asynchronous I/OPaolo Bonzini4-6/+274
With the new support for EventNotifiers in the AIO event loop, we can hook a completion port to every opened file and use asynchronous I/O on them. Wine's support is extremely inefficient, also because it really does the I/O synchronously on regular files. (!) But it works, and it is good to keep the Win32 and POSIX ports as similar as possible. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-31raw-posix: move linux-aio.c to block/Paolo Bonzini2-0/+217
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-31raw-win32: add emulated AIO supportPaolo Bonzini1-49/+138
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-31raw-posix: rename raw-posix-aio.h, hide unavailable prototypesPaolo Bonzini2-5/+7
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-31raw: merge posix-aio-compat.c into block/raw-posix.cPaolo Bonzini2-8/+294
Making the qemu_paiocb specific to raw devices will let us access members of the BDRVRawState arbitrarily. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-31block: switch posix-aio-compat to threadpoolPaolo Bonzini2-11/+2
This is not meant for portability, but to remove code duplication. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-30aio: add Win32 implementationPaolo Bonzini1-1/+5
The Win32 implementation will only accept EventNotifiers, thus a few drivers are disabled under Windows. EventNotifiers are a good match for the GSource implementation, too, because the Win32 port of glib allows to place their HANDLEs in a GPollFD. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-24mirror: add support for on-source-error/on-target-errorPaolo Bonzini1-21/+73
Error management is important for mirroring; otherwise, an error on the target (even something as "innocent" as ENOSPC) requires to start again with a full copy. Similar to on_read_error/on_write_error, two separate knobs are provided for on_source_error (reads) and on_target_error (writes). The default is 'report' for both. The 'ignore' policy will leave the sector dirty, so that it will be retried later. Thus, it will not cause corruption. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-10-24mirror: implement completionPaolo Bonzini1-5/+40
Switching to the target of the migration is done mostly asynchronously, and reported to management via the BLOCK_JOB_COMPLETED event; the only synchronous phase is opening the backing files. bdrv_open_backing_file can always be done, even for migration of the full image (aka sync: 'full'). In this case, qmp_drive_mirror will create the target disk with no backing file at all, and bdrv_open_backing_file will be a no-op. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-10-24mirror: introduce mirror jobPaolo Bonzini2-0/+236
This patch adds the implementation of a new job that mirrors a disk to a new image while letting the guest continue using the old image. The target is treated as a "black box" and data is copied from the source to the target in the background. This can be used for several purposes, including storage migration, continuous replication, and observation of the guest I/O in an external program. It is also a first step in replacing the inefficient block migration code that is part of QEMU. The job is possibly never-ending, but it is logically structured into two phases: 1) copy all data as fast as possible until the target first gets in sync with the source; 2) keep target in sync and ensure that reopening to the target gets a correct (full) copy of the source data. The second phase is indicated by the progress in "info block-jobs" reporting the current offset to be equal to the length of the file. When the job is cancelled in the second phase, QEMU will run the job until the source is clean and quiescent, then it will report successful completion of the job. In other words, the BLOCK_JOB_CANCELLED event means that the target may _not_ be consistent with a past state of the source; the BLOCK_JOB_COMPLETED event means that the target is consistent with a past state of the source. (Note that it could already happen that management lost the race against QEMU and got a completion event instead of cancellation). It is not yet possible to complete the job and switch over to the target disk. The next patches will fix this and add many refinements to the basic idea introduced here. These include improved error management, some tunable knobs and performance optimizations. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-10-24block: rename block_job_complete to block_job_completedPaolo Bonzini2-3/+3
The imperative will be used for the QMP command. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-10-24block: in commit, determine base image from the top imageJeff Cody1-9/+0
This simplifies some code and error checking, and also fixes a bug. bdrv_find_backing_image() should only be passed absolute filenames, or filenames relative to the chain. In the QMP message handler for block commit, when looking up the base do so from the determined top image, so we know it is reachable from top. Some of the error messages put out by block-commit have changed slightly, which causes 2 tests cases for block-commit to fail. This patch updates the test cases to look for the correct error output. Signed-off-by: Jeff Cody <jcody@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-10-12sheepdog: use bool for boolean variablesMORITA Kazutaka1-35/+35
This improves readability. Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2012-10-06Merge branch 'trivial-patches' of git://github.com/stefanha/qemuAurelien Jarno1-1/+0
* 'trivial-patches' of git://github.com/stefanha/qemu: versatilepb: Use symbolic indices for ARM PIC qdev: kill bogus comment qemu-barrier: Fix compiler version check for future gcc versions hw: Add missing 'static' attribute for QEMUMachine cleanup useless return sentence qemu-sockets: Fix compiler warning (regression for MinGW) vnc: Fix spelling (hellmen -> hellman) in comment slirp: Fix spelling in comment (enought -> enough, insure -> ensure) tcg/arm: Use tcg_out_mov_reg rather than inline equivalent code cpu: Add missing 'static' attribute to qemu_global_mutex configure: Support empty target list (--target-list=) hw: Fix return value check for bdrv_read, bdrv_write
2012-10-05cleanup useless return sentenceAmos Kong1-1/+0
This patch cleans up return sentences in the end of void functions. Reported-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Amos Kong <akong@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
2012-10-05qcow2: mark this file's sole strncpy use as justifiedJim Meyering1-0/+1
Acked-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Jim Meyering <meyering@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-10-05vmdk: relative_path: use pstrcpy in place of strncpyJim Meyering1-2/+1
Avoid strncpy+manual-NUL-terminate. Use pstrcpy instead. Acked-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Jim Meyering <meyering@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-10-05sheepdog: avoid a few buffer overrunsJim Meyering1-12/+22
* parse_vdiname: Use pstrcpy, not strncpy, when the destination buffer must be NUL-terminated. * sd_open: Likewise, avoid buffer overrun. * do_sd_create: Likewise. Leave the preceding memset, since pstrcpy does not NUL-fill, and filename needs that. * sd_snapshot_create: Add a comment/question. * find_vdi_name: Remove a useless memset. * sd_snapshot_goto: Remove a useless memset. Use pstrcpy to NUL-terminate, because find_vdi_name requires that its vdi arg (filename parameter) be NUL-terminated. It seems ok not to NUL-fill the buffer. Do the same for snapid: remove useless memset-0 (instead, zero tag[0]). Use pstrcpy, not strncpy. * sd_snapshot_list: Use pstrcpy, not strncpy to write into the ->name member. Each must be NUL-terminated. Acked-by: Kevin Wolf <kwolf@redhat.com> Acked-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Jim Meyering <meyering@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-09-28blkdebug: process all set_state rules in the old statePaolo Bonzini1-5/+7
Currently it is impossible to write a blkdebug script that ping-pongs between two states, because the second set-state rule will use the state that is set in the first. If you have [set-state] event = "..." state = "1" new_state = "2" [set-state] event = "..." state = "2" new_state = "1" for example the state will remain locked at 1. This can be fixed by first processing all rules, and then setting the state. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-28stream: add on-error argumentPaolo Bonzini1-1/+27
This patch adds support for error management to streaming. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-28iostatus: move BlockdevOnError declaration to QAPIPaolo Bonzini1-7/+7
This will let block-stream reuse the enum. Places that used the enums are renamed accordingly. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-28block: move job APIs to separate filesPaolo Bonzini3-2/+5
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-28block: add live block commit functionalityJeff Cody2-0/+268
This adds the live commit coroutine. This iteration focuses on the commit only below the active layer, and not the active layer itself. The behaviour is similar to block streaming; the sectors are walked through, and anything that exists above 'base' is committed back down into base. At the end, intermediate images are deleted, and the chain stitched together. Images are restored to their original open flags upon completion. Signed-off-by: Jeff Cody <jcody@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-28block: Support GlusterFS as a QEMU block backend.Bharata B Rao2-0/+625
This patch adds gluster as the new block backend in QEMU. This gives QEMU the ability to boot VM images from gluster volumes. Its already possible to boot from VM images on gluster volumes using FUSE mount, but this patchset provides the ability to boot VM images from gluster volumes by by-passing the FUSE layer in gluster. This is made possible by using libgfapi routines to perform IO on gluster volumes directly. VM Image on gluster volume is specified like this: file=gluster[+transport]://[server[:port]]/volname/image[?socket=...] 'gluster' is the protocol. 'transport' specifies the transport type used to connect to gluster management daemon (glusterd). Valid transport types are tcp, unix and rdma. If a transport type isn't specified, then tcp type is assumed. 'server' specifies the server where the volume file specification for the given volume resides. This can be either hostname, ipv4 address or ipv6 address. ipv6 address needs to be within square brackets [ ]. If transport type is 'unix', then 'server' field should not be specifed. The 'socket' field needs to be populated with the path to unix domain socket. 'port' is the port number on which glusterd is listening. This is optional and if not specified, QEMU will send 0 which will make gluster to use the default port. If the transport type is unix, then 'port' should not be specified. 'volname' is the name of the gluster volume which contains the VM image. 'image' is the path to the actual VM image that resides on gluster volume. Examples: file=gluster://1.2.3.4/testvol/a.img file=gluster+tcp://1.2.3.4/testvol/a.img file=gluster+tcp://1.2.3.4:24007/testvol/dir/a.img file=gluster+tcp://[1:2:3:4:5:6:7:8]/testvol/dir/a.img file=gluster+tcp://[1:2:3:4:5:6:7:8]:24007/testvol/dir/a.img file=gluster+tcp://server.domain.com:24007/testvol/dir/a.img file=gluster+unix:///testvol/dir/a.img?socket=/tmp/glusterd.socket file=gluster+rdma://1.2.3.4:24007/testvol/a.img Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-25Merge remote-tracking branch 'kwolf/for-anthony' into stagingAnthony Liguori12-91/+286
* kwolf/for-anthony: block: remove keep_read_only flag from BlockDriverState struct block: convert bdrv_commit() to use bdrv_reopen() block: vpc image file reopen block: vdi image file reopen block: vmdk image file reopen block: qcow image file reopen block: qcow2 image file reopen block: qed image file reopen block: raw image file reopen block: raw-posix image file reopen block: purge s->aligned_buf and s->aligned_buf_size from raw-posix.c block: use BDRV_O_NOCACHE instead of s->aligned_buf in raw-posix.c block: do not parse BDRV_O_CACHE_WB in block drivers block: move open flag parsing in raw block drivers to helper functions block: move aio initialization into a helper function block: Framework for reopening files safely block: make bdrv_set_enable_write_cache() modify open_flags block: correctly set the keep_read_only flag blockdev: preserve readonly and snapshot states across media changes
2012-09-24block: vpc image file reopenJeff Cody1-0/+7
There is currently nothing that needs to be done for VPC image file reopen. Signed-off-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-24block: vdi image file reopenJeff Cody1-0/+7
There is currently nothing that needs to be done for VDI reopen. Signed-off-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-24block: vmdk image file reopenJeff Cody1-0/+35
This patch supports reopen for VMDK image files. VMDK extents are added to the existing reopen queue, so that the transactional model of reopen is maintained with multiple image files. Signed-off-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-24block: qcow image file reopenJeff Cody1-0/+10
These are the stubs for the file reopen drivers for the qcow format. There is currently nothing that needs to be done by the qcow driver in reopen. Signed-off-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-24block: qcow2 image file reopenJeff Cody1-0/+10
These are the stubs for the file reopen drivers for the qcow2 format. There is currently nothing that needs to be done by the qcow2 driver in reopen. Signed-off-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-24block: qed image file reopenJeff Cody1-0/+9
These are the stubs for the file reopen drivers for the qed format. There is currently nothing that needs to be done by the qed driver in reopen. Signed-off-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-24block: raw image file reopenJeff Cody1-0/+10
These are the stubs for the file reopen drivers for the raw format. There is currently nothing that needs to be done by the raw driver in reopen. Signed-off-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-24block: raw-posix image file reopenJeff Cody1-0/+114
This is derived from the Supriya Kannery's reopen patches. This contains the raw-posix driver changes for the bdrv_reopen_* functions. All changes are staged into a temporary scratch buffer during the prepare() stage, and copied over to the live structure during commit(). Upon abort(), all changes are abandoned, and the live structures are unmodified. The _prepare() will create an extra fd - either by means of a dup, if possible, or opening a new fd if not (for instance, access control changes). Upon _commit(), the original fd is closed and the new fd is used. Upon _abort(), the duplicate/new fd is closed. Signed-off-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-24block: purge s->aligned_buf and s->aligned_buf_size from raw-posix.cJeff Cody1-20/+1
The aligned_buf pointer and aligned_buf size are no longer used in raw_posix.c, so remove all references to them. Signed-off-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-24block: use BDRV_O_NOCACHE instead of s->aligned_buf in raw-posix.cJeff Cody1-1/+1
Rather than check for a non-NULL aligned_buf to determine if raw_aio_submit needs to check for alignment, check for the presence of BDRV_O_NOCACHE in the bs->open_flags. Signed-off-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-24block: do not parse BDRV_O_CACHE_WB in block driversJeff Cody5-24/+6
Block drivers should ignore BDRV_O_CACHE_WB in .bdrv_open flags, and in the bs->open_flags. This patch removes the code, leaving the behaviour behind as if BDRV_O_CACHE_WB was set. Signed-off-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-24block: move open flag parsing in raw block drivers to helper functionsJeff Cody2-34/+47
Code motion, to move parsing of open flags into a helper function. Signed-off-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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