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* configure: Add a proper check for sys/ioccom.h and use it in tpm_ioctl.hThomas Huth2020-11-171-1/+1
| | | | | | | | | | | On Solaris and Haiku, the _IO() macros are defined in <sys/ioccom.h>. Add a proper check for this header to our build system, and make sure to include the header in tpm_ioctl.h to fix a build failure on Solaris and Haiku. Message-Id: <20201115152317.42752-1-thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
* Include qemu/main-loop.h lessMarkus Armbruster2019-08-161-1/+0Star
| | | | | | | | | | | | | | | | | | | | In my "build everything" tree, changing qemu/main-loop.h triggers a recompile of some 5600 out of 6600 objects (not counting tests and objects that don't depend on qemu/osdep.h). It includes block/aio.h, which in turn includes qemu/event_notifier.h, qemu/notify.h, qemu/processor.h, qemu/qsp.h, qemu/queue.h, qemu/thread-posix.h, qemu/thread.h, qemu/timer.h, and a few more. Include qemu/main-loop.h only where it's needed. Touching it now recompiles only some 1700 objects. For block/aio.h and qemu/event_notifier.h, these numbers drop from 5600 to 2800. For the others, they shrink only slightly. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190812052359.30071-21-armbru@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* Include qemu/queue.h slightly lessMarkus Armbruster2019-08-161-1/+0Star
| | | | | | | Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20190812052359.30071-20-armbru@redhat.com>
* nbd: Move nbd_read_eof() to nbd/client.cKevin Wolf2019-02-251-19/+0Star
| | | | | | | | | | The only caller of nbd_read_eof() is nbd_receive_reply(), so it doesn't have to live in the header file, but can move next to its caller. Also add the missing coroutine_fn to the function and its caller. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
* nbd/client: Drop pointless buf variableEric Blake2019-01-051-1/+2
| | | | | | | | | | | | | | | | | | | | | There's no need to read into a temporary buffer (oversized since commit 7d3123e1) followed by a byteswap into a uint64_t to check for a magic number via memcmp(), when the code immediately below demonstrates reading into the uint64_t then byteswapping in place and checking for a magic number via integer math. What's more, having a different error message when the server's first reply byte is 0 is unusual - it's no different from any other wrong magic number, and we already detected short reads. That whole strlen() issue has been present and useless since commit 1d45f8b5 in 2010; perhaps it was leftover debugging (since the correct magic number happens to be ASCII)? Make the error messages more consistent and detailed while touching things. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Richard W.M. Jones <rjones@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20181215135324.152629-9-eblake@redhat.com>
* nbd: publish _lookup functionsVladimir Sementsov-Ogievskiy2019-01-051-5/+0Star
| | | | | | | | | | | | | These functions are used for formatting pretty trace points. We are going to add some in block/nbd-client, so, let's publish all these functions at once. Note, that nbd_reply_type_lookup is already published, and constants, "named" by these functions live in include/block/nbd.h too. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20181102151152.288399-3-vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* nbd: Minimal structured read for clientVladimir Sementsov-Ogievskiy2017-10-301-1/+0Star
| | | | | | | | | | | | | | | Minimal implementation: for structured error only error_report error message. Note that test 83 is now more verbose, because the implementation prints more warnings about unexpected communication errors; perhaps future patches should tone things down by using trace messages instead of traces, but the common case of successful communication is no noisier than before. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20171027104037.8319-13-eblake@redhat.com>
* nbd: Move nbd_read() to common headerEric Blake2017-10-301-9/+0Star
| | | | | | | | | | | | An upcoming change to block/nbd-client.c will want to read the tail of a structured reply chunk directly from the wire. Move this function to make it easier. Based on a patch from Vladimir Sementsov-Ogievskiy. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20171027104037.8319-12-eblake@redhat.com>
* nbd: Expose constants and structs for structured readEric Blake2017-10-301-1/+1
| | | | | | | | | | | | | | | | | | | Upcoming patches will implement the NBD structured reply extension [1] for both client and server roles. Declare the constants, structs, and lookup routines that will be valuable whether the server or client code is backported in isolation. This includes moving one constant from an internal header to the public header, as part of the structured read processing will be done in block/nbd-client.c rather than nbd/client.c. [1]https://github.com/NetworkBlockDevice/nbd/blob/extension-structured-reply/doc/proto.md Based on patches from Vladimir Sementsov-Ogievskiy. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20171027104037.8319-4-eblake@redhat.com>
* nbd: Move nbd_errno_to_system_errno() to public headerEric Blake2017-10-301-12/+0Star
| | | | | | | | | | This is needed in preparation for structured reply handling, as we will be performing the translation from NBD error to system errno value higher in the stack at block/nbd-client.c. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20171027104037.8319-3-eblake@redhat.com>
* nbd: Include error names in trace messagesEric Blake2017-10-301-0/+1
| | | | | | | | | | | | | | NBD errors were originally sent over the wire based on Linux errno values; but not all the world is Linux, and not all platforms share the same values. Since a number isn't very easy to decipher on all platforms, update the trace messages to include the name of NBD errors being sent/received over the wire. Tweak the trace messages to be at the point where we are using the NBD error, not the translation to the host errno values. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20171027104037.8319-2-eblake@redhat.com>
* nbd: header constants indentingVladimir Sementsov-Ogievskiy2017-10-131-17/+17
| | | | | | | | | Prepare indenting for the following commit. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20171012095319.136610-9-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* nbd: rename some simple-request related objects to be _simple_Vladimir Sementsov-Ogievskiy2017-10-121-1/+1
| | | | | | | | | | To be consistent when their _structured_ analogs will be introduced. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20171012095319.136610-4-vsementsov@virtuozzo.com> [eblake: also tweak trace message contents] Signed-off-by: Eric Blake <eblake@redhat.com>
* nbd: Use new qio_channel_*_all() functionsEric Blake2017-09-061-34/+7Star
| | | | | | | | | | Rather than open-coding our own read/write-all functions, we can make use of the recently-added qio code. It slightly changes the error message in one of the iotests. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20170905191114.5959-4-eblake@redhat.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
* nbd/client: refactor nbd_read_eofVladimir Sementsov-Ogievskiy2017-08-301-9/+24
| | | | | | | | | | | Refactor nbd_read_eof to return 1 on success, 0 on eof, when no data was read and <0 for other cases, because returned size of read data is not actually used. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20170804151440.320927-3-vsementsov@virtuozzo.com> [eblake: tweak function comments, rebase to test 083 enhancements] Signed-off-by: Eric Blake <eblake@redhat.com>
* nbd: Fix server reply to NBD_OPT_EXPORT_NAME of older clientsEric Blake2017-07-181-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | | A typo in commit 23e099c set the size of buf[] used in response to NBD_OPT_EXPORT_NAME according to the length needed for old-style negotiation (4 bytes of flag information) instead of the intended 2 bytes used in new style. If the client doesn't enable NBD_FLAG_C_NO_ZEROES, then the server sends two bytes too many, and is then out of sync in response to the client's next command (the bug is masked when modern qemu is the client, since we enable the no zeroes flag). While touching this code, add some more defines to nbd_internal.h rather than having quite so many magic numbers in the .c; also, use "" initialization rather than memset(), and tweak the oldstyle negotiation to better match the spec description of the layout (since the spec is big-endian, skipping two bytes as 0 followed by writing a 2-byte flag is the same as writing a zero-extended 4-byte flag), to make it a bit easier to follow compared to the spec. [checkpatch.pl has some false positives in the comments] Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20170717192635.17880-3-eblake@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com>
* nbd: Implement NBD_OPT_GO on clientEric Blake2017-07-141-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | NBD_OPT_EXPORT_NAME is lousy: per the NBD protocol, any failure requires the server to close the connection rather than report an error to us. Therefore, upstream NBD recently added NBD_OPT_GO as the improved version of the option that does what we want [1]: it reports sane errors on failures, and on success provides at least as much info as NBD_OPT_EXPORT_NAME. [1] https://github.com/NetworkBlockDevice/nbd/blob/extension-info/doc/proto.md This is a first cut at use of the information types. Note that we do not need to use NBD_OPT_INFO, and that use of NBD_OPT_GO means we no longer have to use NBD_OPT_LIST to learn whether a server requires TLS (this requires servers that gracefully handle unknown NBD_OPT, many servers prior to qemu 2.5 were buggy, but I have patched qemu, upstream nbd, and nbdkit in the meantime, in part because of interoperability testing with this patch). We still fall back to NBD_OPT_LIST when NBD_OPT_GO is not supported on the server, as it is still one last chance for a nicer error message. Later patches will use further info, like NBD_INFO_BLOCK_SIZE. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20170707203049.534-8-eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* nbd: Expose and debug more NBD constantsEric Blake2017-07-141-6/+4Star
| | | | | | | | | | | The NBD protocol has several constants defined in various extensions that we are about to implement. Expose them to the code, along with an easy way to map various constants to strings during diagnostic messages. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20170707203049.534-4-eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* nbd: use generic trace subsystem instead of TRACE macroVladimir Sementsov-Ogievskiy2017-07-101-19/+0Star
| | | | | | | | | | | | | | | | | | Let NBD use the trace mechanisms already present in qemu. Now you can use the -trace optino of qemu, or the -T/--trace option of qemu-img, qemu-io, and qemu-nbd, to select nbd traces. For qemu, the QMP commands trace-event-{get,set}-state can also toggle tracing on the fly. Example: qemu-nbd --trace 'nbd_*' <image file> # enables all nbd traces Recompilation with CFLAGS=-DDEBUG_NBD is no more needed, furthermore, DEBUG_NBD macro is removed from the code. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20170707152918.23086-11-vsementsov@virtuozzo.com> [eblake: minor tweaks to a couple of traces] Signed-off-by: Eric Blake <eblake@redhat.com>
* nbd: make nbd_drop publicVladimir Sementsov-Ogievskiy2017-06-151-0/+2
| | | | | | | | | Following commit will reuse it for nbd server too. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20170602150150.258222-3-vsementsov@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* nbd: rename read_sync and friendsVladimir Sementsov-Ogievskiy2017-06-151-13/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename nbd_wr_syncv -> nbd_rwv read_sync -> nbd_read read_sync_eof -> nbd_read_eof write_sync -> nbd_write drop_sync -> nbd_drop 1. nbd_ prefix read_sync and write_sync are already shared, so it is good to have a namespace prefix. drop_sync will be shared, and read_sync_eof is related to read_sync, so let's rename them all. 2. _sync suffix _sync is related to the fact that nbd_wr_syncv doesn't return if a write to socket returns EAGAIN. The first implementation of nbd_wr_syncv (was wr_sync in 7a5ca8648b) just loops while getting EAGAIN, the current implementation yields in this case. Why we want to get rid of it: - it is normal for r/w functions to be synchronous, so having an additional suffix for it looks redundant (contrariwise, we have _aio suffix for async functions) - _sync suffix in block layer is used when function does flush (so using it for other thing is confusing a bit) - keep function names short after adding nbd_ prefix 3. for nbd_wr_syncv let's use more common notation 'rw' Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20170602150150.258222-2-vsementsov@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* nbd: add errp to read_sync, write_sync and drop_syncVladimir Sementsov-Ogievskiy2017-06-061-6/+10
| | | | | | | | | | There a lot of calls of these functions, which already have errp, which they are filling themselves. On the other hand, nbd_wr_syncv has errp parameter too, so it would be great to connect them. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20170516094533.6160-5-vsementsov@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* nbd: add errp parameter to nbd_wr_syncv()Vladimir Sementsov-Ogievskiy2017-06-061-2/+2
| | | | | | | | | Will be used in following patch to provide actual error message in some cases. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20170516094533.6160-4-vsementsov@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* nbd: read_sync and friends: return 0 on successVladimir Sementsov-Ogievskiy2017-06-061-4/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | functions read_sync, drop_sync, write_sync, and also nbd_negotiate_write, nbd_negotiate_read, nbd_negotiate_drop_sync returns number of processed bytes. But what this number can be, except requested number of bytes? Actually, underlying nbd_wr_syncv function returns a value >= 0 and != requested_bytes only on eof on read operation. So, firstly, it is impossible on write (let's add an assert) and on read it actually means, that communication is broken (except nbd_receive_reply, see below). Most of callers operate like this: if (func(..., size) != size) { /* error path */ } , i.e.: 1. They are not interested in partial success 2. Extra duplications in code (especially bad are duplications of magic numbers) 3. User doesn't see actual error message, as return code is lost. (this patch doesn't fix this point, but it makes fixing easier) Several callers handles ret >= 0 and != requested-size separately, by just returning EINVAL in this case. This patch makes read_sync and friends return EINVAL in this case, so final behavior is the same. And only one caller - nbd_receive_reply() does something not so obvious. It returns EINVAL for ret > 0 and != requested-size, like previous group, but for ret == 0 it returns 0. The only caller of nbd_receive_reply() - nbd_read_reply_entry() handles ret == 0 in the same way as ret < 0, so for now it doesn't matter. However, in following commits error path handling will be improved and we'll need to distinguish success from fail in this case too. So, this patch adds separate helper for this case - read_sync_eof. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20170516094533.6160-3-vsementsov@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* io: change the QIOTask callback signatureDaniel P. Berrange2017-01-231-2/+1Star
| | | | | | | | | | | | | Currently the QIOTaskFunc signature takes an Object * for the source, and an Error * for any error. We also need to be able to provide a result pointer. Rather than continue to add parameters to QIOTaskFunc, remove the existing ones and simply pass the QIOTask object instead. This has methods to access all the other data items required in the callback impl. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
* nbd: Improve server handling of shutdown requestsEric Blake2016-11-021-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | NBD commit 6d34500b clarified how clients and servers are supposed to behave before closing a connection. It added NBD_REP_ERR_SHUTDOWN (for the server to announce it is about to go away during option haggling, so the client should quit sending NBD_OPT_* other than NBD_OPT_ABORT) and ESHUTDOWN (for the server to announce it is about to go away during transmission, so the client should quit sending NBD_CMD_* other than NBD_CMD_DISC). It also clarified that NBD_OPT_ABORT gets a reply, while NBD_CMD_DISC does not. This patch merely adds the missing reply to NBD_OPT_ABORT and teaches the client to recognize server errors. Actually teaching the server to send NBD_REP_ERR_SHUTDOWN or ESHUTDOWN would require knowing that the server has been requested to shut down soon (maybe we could do that by installing a SIGINT handler in qemu-nbd, which transitions from RUNNING to a new state that waits for the client to react, rather than just out-right quitting - but that's a bigger task for another day). Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1476469998-28592-15-git-send-email-eblake@redhat.com> [Move dummy ESHUTDOWN to include/qemu/osdep.h. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* nbd: Share common option-sending code in clientEric Blake2016-11-021-1/+1
| | | | | | | | | | | Rather than open-coding each option request, it's easier to have common helper functions do the work. That in turn requires having convenient packed types for handling option requests and replies. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1476469998-28592-9-git-send-email-eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* nbd: Treat flags vs. command type as separate fieldsEric Blake2016-11-021-2/+2
| | | | | | | | | | | | | | | | | | Current upstream NBD documents that requests have a 16-bit flags, followed by a 16-bit type integer; although older versions mentioned only a 32-bit field with masking to find flags. Since the protocol is in network order (big-endian over the wire), the ABI is unchanged; but dealing with the flags as a separate field rather than masking will make it easier to add support for upcoming NBD extensions that increase the number of both flags and commands. Improve some comments in nbd.h based on the current upstream NBD protocol (https://github.com/yoe/nbd/blob/master/doc/proto.md), and touch some nearby code to keep checkpatch.pl happy. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1476469998-28592-3-git-send-email-eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* nbd: Add qemu-nbd -D for human-readable descriptionEric Blake2016-11-021-2/+3
| | | | | | | | | | | | | The NBD protocol allows servers to advertise a human-readable description alongside an export name during NBD_OPT_LIST. Add an option to pass through the user's string to the NBD client. Doing this also makes it easier to test commit 200650d4, which is the client counterpart of receiving the description. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1476469998-28592-2-git-send-email-eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* nbd: Drop unused offset parameterEric Blake2016-07-201-2/+2
| | | | | | | | | | | | | | | | Now that NBD relies on the block layer to fragment things, we no longer need to track an offset argument for which fragment of a request we are actually servicing. While at it, use true and false instead of 0 and 1 for a bool parameter. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1468607524-19021-6-git-send-email-eblake@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* qemu-common: stop including qemu/bswap.h from qemu-common.hPaolo Bonzini2016-05-191-0/+1
| | | | | | | Move it to the actual users. There are still a few includes of qemu/bswap.h in headers; removing them is left for future work. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* nbd: Avoid bitrot in TRACE() usageEric Blake2016-04-081-6/+9
| | | | | | | | | The compiler is smart enough to optimize out 'if (0)', but won't type-check our printfs if they are hidden behind #if. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1459913704-19949-3-git-send-email-eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* all: Clean up includesPeter Maydell2016-02-231-4/+0Star
| | | | | | | | | | Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Eric Blake <eblake@redhat.com>
* nbd: implement TLS support in the protocol negotiationDaniel P. Berrange2016-02-161-0/+14
| | | | | | | | | | This extends the NBD protocol handling code so that it is capable of negotiating TLS support during the connection setup. This involves requesting the STARTTLS protocol option before any other NBD options. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <1455129674-17255-14-git-send-email-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* nbd: convert to using I/O channels for actual socket I/ODaniel P. Berrange2016-02-161-10/+8Star
| | | | | | | | | | | Now that all callers are converted to use I/O channels for initial connection setup, it is possible to switch the core NBD protocol handling core over to use QIOChannel APIs for actual sockets I/O. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <1455129674-17255-7-git-send-email-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* nbd: Split nbd.cFam Zheng2016-01-151-0/+113
We have NBD server code and client code, all mixed in a file. Now split them into separate files under nbd/, and update MAINTAINERS. filter_nbd for iotest 083 is updated to keep the log filtered out. Signed-off-by: Fam Zheng <famz@redhat.com> Message-Id: <1452760863-25350-3-git-send-email-famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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