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2016-03-30nbd: Support BDRV_REQ_FUAKevin Wolf1-1/+26
The NBD server already used to send a FUA flag when the writethrough mode was set. This code was a remnant from the times where protocol drivers actually had to implement writethrough modes. Since nowadays the block layer sends flushes in writethrough mode and non-root nodes are always writeback, this was mostly dead code - only mostly because if NBD was configured to be used without a format, we sent _both_ FUA and an explicit flush afterwards, which makes the code not technically dead, but useless overhead. This patch changes the code so that the block layer's FUA flag is recognised and translated into a NBD FUA flag. The additional flush is avoided now. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2016-03-22util: move declarations out of qemu-common.hVeronia Bahaa1-1/+1
Move declarations out of qemu-common.h for functions declared in utils/ files: e.g. include/qemu/path.h for utils/path.c. Move inline functions out of qemu-common.h and into new files (e.g. include/qemu/bcd.h) Signed-off-by: Veronia Bahaa <veroniabahaa@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-22include/qemu/osdep.h: Don't include qapi/error.hMarkus Armbruster1-0/+1
Commit 57cb38b included qapi/error.h into qemu/osdep.h to get the Error typedef. Since then, we've moved to include qemu/osdep.h everywhere. Its file comment explains: "To avoid getting into possible circular include dependencies, this file should not include any other QEMU headers, with the exceptions of config-host.h, compiler.h, os-posix.h and os-win32.h, all of which are doing a similar job to this file and are under similar constraints." qapi/error.h doesn't do a similar job, and it doesn't adhere to similar constraints: it includes qapi-types.h. That's in excess of 100KiB of crap most .c files don't actually need. Add the typedef to qemu/typedefs.h, and include that instead of qapi/error.h. Include qapi/error.h in .c files that need it and don't get it now. Include qapi-types.h in qom/object.h for uint16List. Update scripts/clean-includes accordingly. Update it further to match reality: replace config.h by config-target.h, add sysemu/os-posix.h, sysemu/os-win32.h. Update the list of includes in the qemu/osdep.h comment quoted above similarly. This reduces the number of objects depending on qapi/error.h from "all of them" to less than a third. Unfortunately, the number depending on qapi-types.h shrinks only a little. More work is needed for that one. Signed-off-by: Markus Armbruster <armbru@redhat.com> [Fix compilation without the spice devel packages. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-18qapi: Don't special-case simple union wrappersEric Blake1-3/+3
Simple unions were carrying a special case that hid their 'data' QMP member from the resulting C struct, via the hack method QAPISchemaObjectTypeVariant.simple_union_type(). But by using the work we started by unboxing flat union and alternate branches, coupled with the ability to visit the members of an implicit type, we can now expose the simple union's implicit type in qapi-types.h: | struct q_obj_ImageInfoSpecificQCow2_wrapper { | ImageInfoSpecificQCow2 *data; | }; | | struct q_obj_ImageInfoSpecificVmdk_wrapper { | ImageInfoSpecificVmdk *data; | }; ... | struct ImageInfoSpecific { | ImageInfoSpecificKind type; | union { /* union tag is @type */ | void *data; |- ImageInfoSpecificQCow2 *qcow2; |- ImageInfoSpecificVmdk *vmdk; |+ q_obj_ImageInfoSpecificQCow2_wrapper qcow2; |+ q_obj_ImageInfoSpecificVmdk_wrapper vmdk; | } u; | }; Doing this removes asymmetry between QAPI's QMP side and its C side (both sides now expose 'data'), and means that the treatment of a simple union as sugar for a flat union is now equivalent in both languages (previously the two approaches used a different layer of dereferencing, where the simple union could be converted to a flat union with equivalent C layout but different {} on the wire, or to an equivalent QMP wire form but with different C representation). Using the implicit type also lets us get rid of the simple_union_type() hack. Of course, now all clients of simple unions have to adjust from using su->u.member to using su->u.member.data; while this touches a number of files in the tree, some earlier cleanup patches helped minimize the change to the initialization of a temporary variable rather than every single member access. The generated qapi-visit.c code is also affected by the layout change: |@@ -7393,10 +7393,10 @@ void visit_type_ImageInfoSpecific_member | } | switch (obj->type) { | case IMAGE_INFO_SPECIFIC_KIND_QCOW2: |- visit_type_ImageInfoSpecificQCow2(v, "data", &obj->u.qcow2, &err); |+ visit_type_q_obj_ImageInfoSpecificQCow2_wrapper_members(v, &obj->u.qcow2, &err); | break; | case IMAGE_INFO_SPECIFIC_KIND_VMDK: |- visit_type_ImageInfoSpecificVmdk(v, "data", &obj->u.vmdk, &err); |+ visit_type_q_obj_ImageInfoSpecificVmdk_wrapper_members(v, &obj->u.vmdk, &err); | break; | default: | abort(); Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1458254921-17042-13-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-03-05util: Shorten references into SocketAddressEric Blake1-6/+8
An upcoming patch will alter how simple unions, like SocketAddress, are laid out, which will impact all lines of the form 'addr->u.XXX' (expanding it to the longer 'addr->u.XXX.data'). For better legibility in that patch, and less need for line wrapping, it's better to use a temporary variable to reduce the effect of a layout change to just the variable initializations, rather than every reference within a SocketAddress. Also, take advantage of some C99 initialization where it makes sense (simplifying g_new0() to g_new()). Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1457021813-10704-7-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-02-16nbd: enable use of TLS with NBD block driverDaniel P. Berrange1-9/+69
This modifies the NBD driver so that it is possible to request use of TLS. This is done by providing the 'tls-creds' parameter with the ID of a previously created QCryptoTLSCreds object. For example $QEMU -object tls-creds-x509,id=tls0,endpoint=client,\ dir=/home/berrange/security/qemutls \ -drive driver=nbd,host=localhost,port=9000,tls-creds=tls0 The client will drop the connection if the NBD server does not provide TLS. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <1455129674-17255-15-git-send-email-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-16nbd: convert block client to use I/O channels for connection setupDaniel P. Berrange1-19/+20
This converts the NBD block driver client to use the QIOChannelSocket class for initial connection setup. The NbdClientSession struct has two pointers, one to the master QIOChannelSocket providing the raw data channel, and one to a QIOChannel which is the current channel used for I/O. Initially the two point to the same object, but when TLS support is added, they will point to different objects. The qemu-img & qemu-io tools now need to use MODULE_INIT_QOM to ensure the QIOChannel object classes are registered. The qemu-nbd tool already did this. In this initial conversion though, all I/O is still actually done using the raw POSIX sockets APIs. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <1455129674-17255-4-git-send-email-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-20block: Clean up includesPeter Maydell1-2/+1
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> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-12-18block: Pass driver-specific options to .bdrv_refresh_filename()Kevin Wolf1-5/+5
In order to decide whether a blkdebug: filename can be produced or a json: one is necessary, blkdebug checked whether bs->options had more options than just "config", "x-image" or "image" (the latter including nested options). That doesn't work well when generic block layer options are present. This patch passes an option QDict to the driver that contains only driver-specific options, i.e. the options for the general block layer as well as child nodes are already filtered out. Works much better this way. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com>
2015-11-02block: Convert to new qapi union layoutEric Blake1-9/+9
We have two issues with our qapi union layout: 1) Even though the QMP wire format spells the tag 'type', the C code spells it 'kind', requiring some hacks in the generator. 2) The C struct uses an anonymous union, which places all tag values in the same namespace as all non-variant members. This leads to spurious collisions if a tag value matches a non-variant member's name. Make the conversion to the new layout for block-related code. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1445898903-12082-16-git-send-email-eblake@redhat.com> [Commit message tweaked slightly] Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-09-25nbd: convert to use the QAPI SocketAddress objectDaniel P. Berrange1-34/+37
The nbd block driver currently uses a QemuOpts object when setting up sockets. Switch it over to use the QAPI SocketAddress object instead. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <1442411543-28513-2-git-send-email-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-03-18nbd: Fix nbd_establish_connection()'s return valueMax Reitz1-1/+1
unix_connect_opts() and inet_connect_opts() do not necessarily set errno (if at all); therefore, nbd_establish_connection() should not literally return -errno on error. Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <1424887718-10800-4-git-send-email-mreitz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-03-10nbd: fix resource leakGonglei1-0/+1
Signed-off-by: Gonglei <arei.gonglei@huawei.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-02-26QemuOpts: Convert qemu_opt_set_number() to Error, fix its useMarkus Armbruster1-1/+2
Return the Error object instead of reporting it with qerror_report_err(). Change callers that assume the function can't fail to pass &error_abort, so that should the assumption ever break, it'll break noisily. Turns out all callers outside its unit test assume that. We could drop the Error ** argument, but that would make the interface less regular, so don't. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-02-16nbd: Drop BDS backpointerMax Reitz1-23/+14
Before this patch, the "opaque" pointer in an NBD BDS points to a BDRVNBDState, which contains an NbdClientSession object, which in turn contains a pointer to the BDS. This pointer may become invalid due to bdrv_swap(), so drop it, and instead pass the BDS directly to the nbd-client.c functions which then retrieve the NbdClientSession object from there. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1423256778-3340-2-git-send-email-mreitz@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-02-06nbd: fix max_discard/max_transfer_lengthDenis V. Lunev1-0/+9
nbd_co_discard calls nbd_client_session_co_discard which uses uint32_t as the length in bytes of the data to discard due to the following definition: struct nbd_request { uint32_t magic; uint32_t type; uint64_t handle; uint64_t from; uint32_t len; <-- the length of data to be discarded, in bytes } QEMU_PACKED; Thus we should limit bl_max_discard to UINT32_MAX >> BDRV_SECTOR_BITS to avoid overflow. NBD read/write code uses the same structure for transfers. Fix max_transfer_length accordingly. Signed-off-by: Denis V. Lunev <den@openvz.org> CC: Peter Lieven <pl@kamp.de> CC: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-02-06nbd: Improve error messagesMax Reitz1-1/+1
This patch makes use of the Error object for nbd_receive_negotiate() so that errors during negotiation look nicer. Furthermore, this patch adds an additional error message if the received magic was wrong, but would be correct for the other protocol version, respectively: So if an export name was specified, but the NBD server magic corresponds to an old handshake, this condition is explicitly signaled to the user, and vice versa. As these messages are now part of the "Could not open image" error message, additional filtering has to be employed in iotest 083, which this patch does as well. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20nbd: Fix filename generationMax Reitz1-15/+29
Export names may be used with nbd+unix, too, fix nbd_refresh_filename() accordingly. Also, for nbd+tcp, the documented path schema is "nbd://host[:port]/export", so use it. Furthermore, as can be seen from that schema, the port is optional. That makes six single cases for how the filename can be formatted; it is not easy to generalize these cases without the resulting statement being completely unreadable, thus there is simply one snprintf() per case. Finally, taking the options from BDRVNBDState::socket_opts is wrong, because those will not contain the export name. Just use BlockDriverState::options instead. Reported-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-08-20nbd: Implement bdrv_refresh_filename()Max Reitz1-0/+36
Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-06-04nbd: implement .bdrv_detach/attach_aio_context()Stefan Hajnoczi1-33/+54
Drop the assumption that we're using the main AioContext. Convert qemu_aio_set_fd_handler() calls to aio_set_fd_handler(). The .bdrv_detach/attach_aio_context() interfaces also need to be implemented to move the socket fd handler from the old to the new AioContext. Acked-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-04-25nbd: Use return values instead of error_is_set(errp)Markus Armbruster1-1/+1
Using error_is_set(errp) to check whether a function call failed is fragile: it breaks when errp is null. Check perfectly suitable return values instead when possible. errp can't be null there now, but this is more robust and more obviously correct Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-02-21nbd: correctly propagate errorsPaolo Bonzini1-18/+16
Before: $ ./qemu-io-old qemu-io-old> open -r -o file.driver=nbd one of path and host must be specified. qemu-io-old: can't open device (null): Could not open image: Invalid argument $ ./qemu-io-old qemu-io-old> open -r -o file.driver=nbd,file.host=foo,file.path=bar path and host may not be used at the same time. qemu-io-old: can't open device (null): Could not open image: Invalid argument After: $ ./qemu-io qemu-io> open -r -o file.driver=nbd qemu-io: can't open device (null): one of path and host must be specified. $ ./qemu-io qemu-io> open -r -o file.driver=nbd,file.host=foo,file.path=bar qemu-io: can't open device (null): path and host may not be used at the same time. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-02-21nbd: produce a better error if neither host nor port is passedPaolo Bonzini1-7/+6
Before: $ qemu-io-old qemu-io-old> open -r -o file.driver=nbd qemu-io-old: can't open device (null): Could not open image: Invalid argument $ ./qemu-io-old qemu-io-old> open -r -o file.driver=nbd,file.host=foo,file.path=bar path and host may not be used at the same time. qemu-io-old: can't open device (null): Could not open image: Invalid argument After: $ ./qemu-io qemu-io> open -r -o file.driver=nbd one of path and host must be specified. qemu-io: can't open device (null): Could not open image: Invalid argument $ ./qemu-io qemu-io> open -r -o file.driver=nbd,file.host=foo,file.path=bar path and host may not be used at the same time. qemu-io: can't open device (null): Could not open image: Invalid argument Next patch will fix the error propagation. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-02-17Use error_is_set() only when necessaryMarkus Armbruster1-1/+1
error_is_set(&var) is the same as var != NULL, but it takes whole-program analysis to figure that out. Unnecessarily hard for optimizers, static checkers, and human readers. Dumb it down to obvious. Gets rid of several dozen Coverity false positives. Note that the obvious form is already used in many places. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2014-01-06qemu-option: Remove qemu_opts_create_nofailPeter Crosthwaite1-1/+2
This is a boiler-plate _nofail variant of qemu_opts_create. Remove and use error_abort in call sites. null/0 arguments needs to be added for the id and fail_if_exists fields in affected callsites due to argument inconsistency between the normal and no_fail variants. Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-12-16nbd: pass export name as init argumentMarc-André Lureau1-5/+8
There is no need to keep the export name around, and it seems a better fit as an argument in the init() call. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-12-16Split nbd block client codeMarc-André Lureau1-345/+28
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-09-12bdrv: Use "Error" for opening imagesMax Reitz1-1/+2
Add an Error ** parameter to BlockDriver.bdrv_open and BlockDriver.bdrv_file_open to allow more specific error messages. Signed-off-by: Max Reitz <mreitz@redhat.com>
2013-08-19aio: drop io_flush argumentStefan Hajnoczi1-7/+4
The .io_flush() handler no longer exists and has no users. Drop the io_flush argument to aio_set_fd_handler() and related functions. The AioFlushEventNotifierHandler and AioFlushHandler typedefs are no longer used and are dropped too. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-08-19block/nbd: drop nbd_have_request()Stefan Hajnoczi1-10/+3
.io_flush() is no longer called so drop nbd_have_request(). We cannot drop in_flight since it is still used by other block/nbd.c code. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-06-18nbd: strip braces from literal IPv6 address in URIJán Tomko1-1/+10
Otherwise they would get passed to getaddrinfo and fail with: address resolution failed for [::1]:1234: Name or service not known (Broken by commit v1.4.0-736-gf17c90b) Signed-off-by: Ján Tomko <jtomko@redhat.com> Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-05-12remove double semicolonsDong Xu Wang1-1/+1
Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2013-04-22Merge remote-tracking branch 'kwolf/for-anthony' into stagingAnthony Liguori1-2/+1
# By Kevin Wolf (16) and Stefan Hajnoczi (4) # Via Kevin Wolf * kwolf/for-anthony: qemu-iotests: add 053 unaligned compressed image size test block: Allow overriding backing.file.filename block: Remove filename parameter from .bdrv_file_open() vvfat: Use bdrv_open options instead of filename sheepdog: Use bdrv_open options instead of filename rbd: Use bdrv_open options instead of filename iscsi: Use bdrv_open options instead of filename gluster: Use bdrv_open options instead of filename curl: Use bdrv_open options instead of filename blkverify: Use bdrv_open options instead of filename blkdebug: Use bdrv_open options instead of filename raw-win32: Use bdrv_open options instead of filename raw-posix: Use bdrv_open options instead of filename block: Enable filename option block: Add driver-specific options for backing files block: Fail gracefully when using a format driver on protocol level qemu-iotests: Fix _filter_qemu qemu-img: do not zero-pad the compressed write buffer qcow: allow sub-cluster compressed write to last cluster qcow2: allow sub-cluster compressed write to last cluster Message-id: 1366630294-18984-1-git-send-email-kwolf@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-04-22block: Remove filename parameter from .bdrv_file_open()Kevin Wolf1-2/+1
It is unused now in all block drivers. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-04-15nbd: set TCP_NODELAYStefan Hajnoczi1-0/+3
Disable the Nagle algorithm to reduce latency. Note this means we must also use TCP_CORK when sending header followed by payload to avoid fragmenting lots of little packets. The previous patch took care of that. Suggested-by: Nick Thomas <nick@bytemark.co.uk> Tested-by: Nick Thomas <nick@bytemark.co.uk> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-04-15nbd: use TCP_CORK in nbd_co_send_request()Stefan Hajnoczi1-6/+16
Use TCP_CORK to defer packet transmission until both the header and the payload have been written. Suggested-by: Nick Thomas <nick@bytemark.co.uk> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-04-15nbd: unlock mutex in nbd_co_send_request() error pathStefan Hajnoczi1-1/+1
Cc: qemu-stable@nongnu.org Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-04-02oslib-posix: rename socket_set_nonblock() to qemu_set_nonblock()Stefan Hajnoczi1-1/+1
The fcntl(fd, F_SETFL, O_NONBLOCK) flag is not specific to sockets. Rename to qemu_set_nonblock() just like qemu_set_cloexec(). Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-03-22nbd: Check against invalid option combinationsKevin Wolf1-0/+14
A file name may only specified if no host or socket path is specified. The latter two may not appear at the same time either. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-03-22nbd: Use default port if only host is specifiedKevin Wolf1-9/+10
The URL method already takes care to apply the default port when none is specfied. Directly specifying driver-specific options required the port number until now. Allow leaving it out and apply the default. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-03-22block: Introduce .bdrv_parse_filename callbackKevin Wolf1-16/+13
If a driver needs structured data and not just a string, it can provide a .bdrv_parse_filename callback now that parses the command line string into separate options. Keeping this separate from .bdrv_open_filename ensures that the preferred way of directly specifying the options always works as well if parsing the string works. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-03-22nbd: Accept -drive options for the network connectionKevin Wolf1-52/+77
The existing parsers for the file name now parse everything into the bdrv_open() options QDict. Instead of using these parsers, you can now directly specify the options on the command line, like this: qemu-system-x86_64 -drive file=nbd:,file.port=1234,file.host=::1 Clearly the file=... part could use further improvement, but it's a start. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-03-22nbd: Keep hostname and port separateKevin Wolf1-9/+40
The NBD block supports an URL syntax, for which a URL parser returns separate hostname and port fields. It also supports the traditional qemu syntax encoded in a filename. Until now, after parsing the URL to get each piece of information, a new string is built to be fed to socket functions. Instead of building a string in the URL case that is immediately parsed again, parse the string in both cases and use the QemuOpts interface to qemu-sockets.c. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-03-22block: Add options QDict to bdrv_file_open() prototypesKevin Wolf1-1/+2
The new parameter is unused yet. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2012-12-19misc: move include files to include/qemu/Paolo Bonzini1-3/+3
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19block: move include files to include/block/Paolo Bonzini1-2/+2
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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>
2012-06-11cleanup qemu_co_sendv(), qemu_co_recvv() and friendsMichael Tokarev1-8/+10
The same as for non-coroutine versions in previous patches: rename arguments to be more obvious, change type of arguments from int to size_t where appropriate, and use common code for send and receive paths (with one extra argument) since these are exactly the same. Use common iov_send_recv() directly. qemu_co_sendv(), qemu_co_recvv(), and qemu_co_recv() are now trivial #define's merely adding one extra arg. qemu_co_sendv() and qemu_co_recvv() callers are converted to different argument order and extra `iov_cnt' argument. Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2012-04-26nbd: Fix uninitialised use of s->sockKevin Wolf1-1/+1
s->sock is assigned only afterwards, so we're really registering an aio_fd_handler for file descriptor 0 here. Not exactly what we intended. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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