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2012-01-04hw/9pfs: Open and create filesM. Mohan Kumar
Add interfaces to open and create files for proxy file system driver. Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2012-01-04hw/9pfs: File system helper process for qemu 9p proxy FSM. Mohan Kumar
Provide root privilege access to QEMU 9p proxy filesystem using socket communication. Proxy helper is started by root user as: ~ # virtfs-proxy-helper -f|--fd <socket descriptor> -p|--path <path-to-share> Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2012-01-04hw/9pfs: Add new proxy filesystem driverM. Mohan Kumar
Add new proxy filesystem driver to add root privilege to qemu process. It needs a helper process to be started by root user. Following command line can be used to utilize proxy filesystem driver -virtfs proxy,id=<id>,mount_tag=<tag>,socket_fd=<socket-fd> Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2012-01-04hw/9pfs: Add validation to {un}marshal codeM. Mohan Kumar
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2012-01-04hw/9pfs: Move pdu_marshal/unmarshal code to a seperate fileM. Mohan Kumar
Move p9 marshaling/unmarshaling code to a separate file so that proxy filesytem driver can use these calls. Also made marshaling code generic to accept "struct iovec" instead of V9fsPDU. Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2012-01-04hw/9pfs: Move opt validation to FsDriver callbackAneesh Kumar K.V
This remove all conditional code from common code path and make opt validation a FSDriver callback. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2012-01-03Merge remote-tracking branch 'qemu-kvm/memory/page_desc' into stagingAnthony Liguori
* qemu-kvm/memory/page_desc: (22 commits) Remove cpu_get_physical_page_desc() sparc: avoid cpu_get_physical_page_desc() virtio-balloon: avoid cpu_get_physical_page_desc() vhost: avoid cpu_get_physical_page_desc() kvm: avoid cpu_get_physical_page_desc() memory: remove CPUPhysMemoryClient xen: convert to MemoryListener API memory: temporarily add memory_region_get_ram_addr() xen, vga: add API for registering the framebuffer vhost: convert to MemoryListener API kvm: convert to MemoryListener API kvm: switch kvm slots to use host virtual address instead of ram_addr_t memory: add API for observing updates to the physical memory map memory: replace cpu_physical_sync_dirty_bitmap() with a memory API framebuffer: drop use of cpu_physical_sync_dirty_bitmap() loader: remove calls to cpu_get_physical_page_desc() framebuffer: drop use of cpu_get_physical_page_desc() memory: introduce memory_region_find() memory: add memory_region_is_logging() memory: add memory_region_is_rom() ...
2012-01-03Remove cpu_get_physical_page_desc()Avi Kivity
No longer used. Signed-off-by: Avi Kivity <avi@redhat.com>
2012-01-03sparc: avoid cpu_get_physical_page_desc()Avi Kivity
This reaches into the innards of the memory core, which are being changed. Switch to a memory API version. Signed-off-by: Avi Kivity <avi@redhat.com>
2012-01-03virtio-balloon: avoid cpu_get_physical_page_desc()Avi Kivity
This reaches into the innards of the memory core, which are being changed. Switch to a memory API version. Signed-off-by: Avi Kivity <avi@redhat.com>
2012-01-03vhost: avoid cpu_get_physical_page_desc()Avi Kivity
This reaches into the innards of the memory core, which are being changed. Switch to a memory API version. Signed-off-by: Avi Kivity <avi@redhat.com>
2012-01-03kvm: avoid cpu_get_physical_page_desc()Avi Kivity
This reaches into the innards of the memory core, which are being changed. Switch to a memory API version. Signed-off-by: Avi Kivity <avi@redhat.com>
2012-01-03memory: remove CPUPhysMemoryClientAvi Kivity
No longer used. Signed-off-by: Avi Kivity <avi@redhat.com>
2012-01-03xen: convert to MemoryListener APIAvi Kivity
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-27Fix qapi code generation wrt parallel buildAvi Kivity
Make's multiple output syntax x.c x.h: x.template gen < x.template actually invokes the command once for x.c and once for x.h (with differing $@ in each invocation). During a parallel build, the two commands may be invoked in parallel; this opens up a race, where the second invocation trashes a file supposedly produced during the first, and now in use by a dependent command. The various qapi code generators are susceptible to this; fix by making them generate just one file per invocation. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-12-27Merge remote-tracking branch 'aneesh/for-upstream' into stagingAnthony Liguori
* aneesh/for-upstream: scripts/analyse-9p-simpletrace.py: Add symbolic names for 9p operations. hw/9pfs: iattr_valid flags are kernel internal flags map them to 9p values. hw/9pfs: Use the correct signed type for different variables hw/9pfs: replace iovec manipulation with QEMUIOVector
2011-12-27Merge remote-tracking branch 'bonzini/nbd-for-anthony' into stagingAnthony Liguori
* bonzini/nbd-for-anthony: (26 commits) nbd: add myself as maintainer qemu-nbd: throttle requests qemu-nbd: asynchronous operation qemu-nbd: add client pointer to NBDRequest qemu-nbd: move client handling to nbd.c qemu-nbd: use common main loop link the main loop and its dependencies into the tools qemu-nbd: introduce NBDRequest qemu-nbd: introduce NBDExport qemu-nbd: introduce nbd_do_receive_request qemu-nbd: more robust handling of invalid requests qemu-nbd: introduce nbd_do_send_reply qemu-nbd: simplify nbd_trip move corking functions to osdep.c qemu-nbd: remove data_size argument to nbd_trip qemu-nbd: remove offset argument to nbd_trip Update ioctl order in nbd_init() to detect EBUSY nbd: add support for NBD_CMD_TRIM nbd: add support for NBD_CMD_FLUSH nbd: add support for NBD_CMD_FLAG_FUA ...
2011-12-22enable architectural PMU cpuid leaf for kvmGleb Natapov
Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-12-22Set numa topology for max_cpusVasilis Liaskovitis
qemu-kvm passes numa/SRAT topology information for smp_cpus to SeaBIOS. However SeaBIOS always expects to setup max_cpus number of SRAT cpu entries (MaxCountCPUs variable in build_srat function of Seabios). When qemu-kvm runs with smp_cpus != max_cpus (e.g. -smp 2,maxcpus=4), Seabios will mistakenly use memory SRAT info for setting up CPU SRAT entries for the offline CPUs. Wrong SRAT memory entries are also created. This breaks NUMA in a guest. Fix by setting up SRAT info for max_cpus in qemu-kvm. Signed-off-by: Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-12-22kvm: x86: Drop redundant apic base and tpr update from kvm_get_sregsJan Kiszka
The latter was already commented out, the former is redundant as well. We always get the latest changes after return from the guest via kvm_arch_post_run. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-12-22kvm: x86: Avoid runtime allocation of xsave bufferJan Kiszka
Keep a per-VCPU xsave buffer for kvm_put/get_xsave instead of continuously allocating and freeing it on state sync. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-12-22kvm: x86: Use symbols for all xsave fieldJan Kiszka
Field 0 (FCW+FSW) and 1 (FTW+FOP) were hard-coded so far. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-12-22nbd: add myself as maintainerPaolo Bonzini
Not planning to do much else, hence listing it as "Odd Fixes". Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: throttle requestsPaolo Bonzini
Limiting the number of in-flight requests is implemented very simply with a can_read callback. It does not require a semaphore, unlike the client side in block/nbd.c, because we can throttle directly the creation of coroutines. The client side can have a coroutine created at any time when an I/O request is made. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: asynchronous operationPaolo Bonzini
Using coroutines enable asynchronous operation on both the network and the block side. Network can be owned by two coroutines at the same time, one writing and one reading. On the send side, mutual exclusion is guaranteed by a CoMutex. On the receive side, mutual exclusion is guaranteed because new coroutines immediately start receiving data, and no new coroutines are created as long as the previous one is receiving. Between receive and send, qemu-nbd can have an arbitrary number of in-flight block transfers. Throttling is implemented by the next patch. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: add client pointer to NBDRequestPaolo Bonzini
By attaching a client to an NBDRequest, we can avoid passing around the socket descriptor and data buffer. Also, we can now manage the reference count for the client in nbd_request_get/put request instead of having to do it ourselved in nbd_read. This simplifies things when coroutines are used. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: move client handling to nbd.cPaolo Bonzini
This patch sets up the fd handler in nbd.c instead of qemu-nbd.c. It introduces NBDClient, which wraps the arguments to nbd_trip in a single structure, so that we can add a notifier to it. This way, qemu-nbd can know about disconnections. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: use common main loopPaolo Bonzini
Using a single main loop for sockets will help yielding from the socket coroutine back to the main loop, and later reentering it. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22link the main loop and its dependencies into the toolsPaolo Bonzini
Using the main loop code from QEMU enables tools to operate fully asynchronously. Advantages include better Windows portability (for some definition of portability) over glib's. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: introduce NBDRequestPaolo Bonzini
Move the buffer from NBDExport to a new structure, so that it will be possible to have multiple in-flight requests for the same export (and for the same client too---we get that for free). Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: introduce NBDExportPaolo Bonzini
Wrap the common parameters of nbd_trip and nbd_negotiate in a single opaque struct. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: introduce nbd_do_receive_requestPaolo Bonzini
Group the receiving of a response and the associated data into a new function. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: more robust handling of invalid requestsPaolo Bonzini
Fail invalid requests with EINVAL instead of dropping them into the void. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: introduce nbd_do_send_replyPaolo Bonzini
Group the sending of a reply and the associated data into a new function. Without corking, the caller would be forced to leave 12 free bytes at the beginning of the data pointer. Not too ugly, but still ugly. :) Using nbd_do_send_reply everywhere will help when the routine will set up the write handler that re-enters the send coroutine. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: simplify nbd_tripPaolo Bonzini
Use TCP_CORK to remove a violation of encapsulation, that would later require nbd_trip to know too much about an NBD reply. We could also switch to sendmsg (qemu_co_sendv) later, it is even easier once coroutines are in. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22move corking functions to osdep.cPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: remove data_size argument to nbd_tripPaolo Bonzini
The size of the buffer is in practice part of the protocol. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22qemu-nbd: remove offset argument to nbd_tripPaolo Bonzini
The argument is write-only. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22Update ioctl order in nbd_init() to detect EBUSYChunyan Liu
Update ioctl(s) in nbd_init() to detect device busy early. Current nbd_init() issues NBD_CLEAR_SOCKET before NBD_SET_SOCKET, if issuing "qemu-nbd -c /dev/nbd0 disk.img" twice, the second time won't detect EBUSY in nbd_init(), but in nbd_client will report EBUSY and do clear socket (the 1st time command will be affacted too because of no socket any more.) No change to previous version. Signed-off-by: Chunyan Liu <cyliu@suse.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22nbd: add support for NBD_CMD_TRIMPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22nbd: add support for NBD_CMD_FLUSHPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22nbd: add support for NBD_CMD_FLAG_FUAPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22nbd: fix error handling in the serverPaolo Bonzini
bdrv_read and bdrv_write return negative errno values, not -1. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22nbd: allow multiple in-flight requestsPaolo Bonzini
Allow sending up to 16 requests, and drive the replies to the coroutine that did the request. The code is written to be exactly the same as before this patch when MAX_NBD_REQUESTS == 1 (modulo the extra mutex and state). Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22nbd: split requestsPaolo Bonzini
qemu-nbd has a limit of slightly less than 1M per request. Work around this in the nbd block driver. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22nbd: switch to asynchronous operationPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22sheepdog: move coroutine send/recv function to generic codePaolo Bonzini
Outside coroutines, avoid busy waiting on EAGAIN by temporarily making the socket blocking. The API of qemu_recvv/qemu_sendv is slightly different from do_readv/do_writev because they do not handle coroutines. It returns the number of bytes written before encountering an EAGAIN. The specificity of yielding on EAGAIN is entirely in qemu-coroutine.c. Reviewed-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-21virtio-serial-bus: Ports are expected to implement 'have_data' callbackAmit Shah
There's no need to check if ports can accept any incoming data from the guest each time the guest sends data. Check if the port implements such functionality during port initialisation. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-12-21virtio-console: Properly initialise class methodsAmit Shah
The earlier code really was a hack: initialising class methods in an object init function as noted by Anthony. The motivation for that was to not have the virtio-serial-bus call into the callback functions if there was no chardev backend registered. However, that really wasn't a worthwhile optimisation, and definitely not one that was well-implemented. Get rid of it. Reported-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-12-21virtio-console: Check if chardev backends available before calling into themAmit Shah
For the callback functions invoked by the virtio-serial-bus code, check if we have chardev backends registered before we call into the chardev functions. Signed-off-by: Amit Shah <amit.shah@redhat.com> Reported-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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