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2013-04-08hw: move headers to include/Paolo Bonzini1-1/+1
Many of these should be cleaned up with proper qdev-/QOM-ification. Right now there are many catch-all headers in include/hw/ARCH depending on cpu.h, and this makes it necessary to compile these files per-target. However, fixing this does not belong in these patches. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-04-04qemu-char: Call fe_claim / fe_release when not using qdev chr propertiesHans de Goede1-0/+1
chardev-frontends need to explictly check, increase and decrement the avail_connections "property" of the chardev when they are not using a qdev-chardev-property for the chardev. This fixes things like: qemu-kvm -chardev stdio,id=foo -device isa-serial,chardev=foo \ -mon chardev=foo Working, where they should fail. Most of the changes here are due to old hardware emulation code which is using serial_hds directly rather then a qdev-chardev-property. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Message-id: 1364412581-3672-3-git-send-email-hdegoede@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-04-02net: ensure "socket" backend uses non-blocking fdsStefan Hajnoczi1-1/+6
There are several code paths in net_init_socket() depending on how the socket is created: file descriptor passing, UDP multicast, TCP, or UDP. Some of these support both listen and connect. Not all code paths set the socket to non-blocking. This patch addresses the file descriptor passing and UDP cases which were missing socket_set_nonblock(fd) calls. I considered moving socket_set_nonblock(fd) to a central location but it turns out the code paths are different enough to require non-blocking at different places. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-04-02oslib-posix: rename socket_set_nonblock() to qemu_set_nonblock()Stefan Hajnoczi1-3/+3
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>
2013-03-25net: increase buffer size to accommodate Jumbo frame pktsScott Feldman4-10/+5
Socket buffer sizes were hard-coded to 4K for VDE and socket netdevs. Bump this up to 68K (ala tap netdev) to handle maximum GSO packet size (64k) plus plenty of room for the ethernet and virtio_net headers. Originally, ran into this limitation when using -netdev UDP sockets to connect VM-to-VM, where VM interface is configure with MTU=9000. (Using virtio_net NIC model). Test is simple: ping -M do -s 8500 <target>. This test will attempt to ping with unfragmented packet of given size. Without patch, size is limited to < 4K (minus protocol hdrs). With patch, ping test works with pkt size up to 9000 (again, minus protocol hdrs). v2: per Stefan, increase buf size to (4096+65536) as done in tap and apply to vde and socket netdevs. v1: increase buf size to 12K just for -netdev UDP sockets Signed-off-by: Scott Feldman <sfeldma@cumulusnetworks.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-25Common definitions for VMWARE devicesDmitry Fleytman2-0/+218
Signed-off-by: Dmitry Fleytman <dmitry@daynix.com> Signed-off-by: Yan Vugenfirer <yan@daynix.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-25net: iovec checksum calculatorDmitry Fleytman1-0/+29
Signed-off-by: Dmitry Fleytman <dmitry@daynix.com> Signed-off-by: Yan Vugenfirer <yan@daynix.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-25Checksum-related utility functionsDmitry Fleytman1-6/+7
net_checksum_add_cont() checksum calculation for scattered data with odd chunk sizes net_raw_checksum() checksum calculation for a buffer Signed-off-by: Dmitry Fleytman <dmitry@daynix.com> Signed-off-by: Yan Vugenfirer <yan@daynix.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-25net: use socket_set_nodelay() for -netdev socketStefan Hajnoczi1-0/+3
Reduce -netdev socket latency by disabling the Nagle algorithm on SOCK_STREAM sockets in net/socket.c. Since we are tunelling Ethernet over TCP we shouldn't artificially delay outgoing packets, let the guest decide packet scheduling. I already get sub-millisecond -netdev socket ping times on localhost, so there was no measurable difference in my testing. This won't hurt though and may improve remote socket performance. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
2013-03-22Fix typos and misspellingsPeter Maydell1-1/+1
Fix various typos and misspellings. The bulk of these were found with codespell. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-22MinGW: Replace setsockopt by qemu_setsocketoptStefan Weil1-11/+10
Instead of adding missing type casts which are needed by MinGW for the 4th argument, the patch uses qemu_setsockopt which was invented for this purpose. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-02-27net: reduce the unnecessary memory allocation of multiqueueJason Wang1-10/+9
Edivaldo reports a problem that the array of NetClientState in NICState is too large - MAX_QUEUE_NUM(1024) which will wastes memory even if multiqueue is not used. Instead of static arrays, solving this issue by allocating the queues on demand for both the NetClientState array in NICState and VirtIONetQueue array in VirtIONet. Tested by myself, with single virtio-net-pci device. The memory allocation is almost the same as when multiqueue is not merged. Cc: Edivaldo de Araujo Pereira <edivaldoapereira@yahoo.com.br> Cc: qemu-stable@nongnu.org Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-02-27tap: set IFF_ONE_QUEUE per defaultPeter Lieven2-8/+11
historically the kernel queues packets two times. once at the device and second in qdisc. this is believed to cause interface stalls if one of these queues overruns. setting IFF_ONE_QUEUE is the default in kernels >= 3.8. the flag is ignored since then. see kernel commit 5d097109257c03a71845729f8db6b5770c4bbedc Signed-off-by: Peter Lieven <pl@kamp.de> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-02-27tap: forbid creating multiqueue tap when hub is usedJason Wang1-0/+7
Obviously, hub does not support multiqueue tap. So this patch forbids creating multiple queue tap when hub is used to prevent the crash when command line such as "-net tap,queues=2" is used. Cc: qemu-stable@nongnu.org Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-02-27net: fix unbounded NetQueueLuigi Rizzo1-0/+15
In the current implementation of qemu, running without a network backend will cause the queue to grow unbounded when the guest is transmitting traffic. This patch fixes the problem by implementing bounded size NetQueue, used with an arbitrary limit of 10000 packets, and dropping packets when the queue is full _and_ the sender does not pass a callback. The second condition makes sure that we never drop packets that contains a callback (which would be tricky, because the producer expects the callback to be run when all previous packets have been consumed; so we cannot run it when the packet is dropped). If documentation is correct, producers that submit a callback should stop sending when their packet is queued, so there is no real risk that the queue exceeds the max size by large values. Signed-off-by: Luigi Rizzo <rizzo@iet.unipi.it> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-02-27net: fix qemu_flush_queued_packets() in presence of a hubLuigi Rizzo3-0/+21
When frontend and backend are connected through a hub as below (showing only one direction), and the frontend (or in general, all output ports of the hub) cannot accept more traffic, the backend queues packets in queue-A. When the frontend (or in general, one output port) becomes ready again, quemu tries to flush packets from queue-B, which is unfortunately empty. e1000.0 <--[queue B]-- hub0port0(hub)hub0port1 <--[queue A]-- tap.0 To fix this i propose to introduce a new function net_hub_flush() which is called when trying to flush a queue connected to a hub. Signed-off-by: Luigi Rizzo <rizzo@iet.unipi.it> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-02-13net: Avoid NULL function pointer dereference on cleanupAndreas Färber1-1/+3
The pSeries machine and some other devices don't supply a cleanup callback. Revert part of 1ceef9f27359cbe92ef124bf74de6f792e71f6fb that started calling it unconditionally. Cc: Jason Wang <jasowang@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de> Message-id: 1360707366-9271-1-git-send-email-afaerber@suse.de Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-07net: fix infinite loop on exitMichael Roth1-1/+1
1ceef9f27359cbe92ef124bf74de6f792e71f6fb added handling for cleaning up multiple queues in qemu_del_nic() for cases where multiqueue is in use. To determine the number of queues it looks at nic->conf->queues, then iterates through all the queues to cleanup the associated NetClientStates. If no queues are found, no NetClientStates are deleted. However, nic->conf->queues is only set when a peer is created via -netdev or netdev_add, and is otherwise 0. This causes us to spin in net_cleanup() if we attempt to shut down qemu before adding a host device. Since qemu_new_nic() unconditionally creates at least 1 queue/NetClientState at queue idx 0, make qemu_del_nic() always attempt to clean it up. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01tap: unbreak -netdev tap,fd=XAnthony Liguori1-1/+1
The multiqueue patch series broke -netdev tap,fd=X which manifests as libvirt not being able to start a guest. This was because it passed NULL for the netdev name which results in an anonymous netdev device regardless of what the user specified. Cc: Jason Wang <jasowang@redhat.com> Cc: Bruce Rogers <brogers@suse.com> Reported-by: Bruce Rogers <brogers@suse.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01tap: multiqueue supportJason Wang7-42/+135
Recently, linux support multiqueue tap which could let userspace call TUNSETIFF for a signle device many times to create multiple file descriptors as independent queues. User could also enable/disabe a specific queue through TUNSETQUEUE. The patch adds the generic infrastructure to create multiqueue taps. To achieve this a new parameter "queues" were introduced to specify how many queues were expected to be created for tap by qemu itself. Alternatively, management could also pass multiple pre-created tap file descriptors separated with ':' through a new parameter fds like -netdev tap,id=hn0,fds="X:Y:..:Z". Multiple vhost file descriptors could also be passed in this way. Each TAPState were still associated to a tap fd, which mean multiple TAPStates were created when user needs multiqueue taps. Since each TAPState contains one NetClientState, with the multiqueue nic support, an N peers of NetClientState were built up. A new parameter, mq_required were introduce in tap_open() to create multiqueue tap fds. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01tap: introduce a helper to get the name of an interfaceJason Wang6-0/+32
This patch introduces a helper tap_get_ifname() to get the device name of tap device. This is needed when ifname is unspecified in the command line and qemu were asked to create tap device by itself. In this situation, the name were allocated by kernel, so if multiqueue is asked, we need to fetch its name after creating the first queue. Only linux has this support since it's the only platform that supports multiqueue tap. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01tap: support enabling or disabling a queueJason Wang2-3/+50
This patch introduce a new bit - enabled in TAPState which tracks whether a specific queue/fd is enabled. The tap/fd is enabled during initialization and could be enabled/disabled by tap_enalbe() and tap_disable() which calls platform specific helpers to do the real work. Polling of a tap fd can only done when the tap was enabled. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01tap: add Linux multiqueue supportJason Wang6-0/+97
This patch add basic multiqueue support for Linux. When multiqueue is needed, we will first check whether kernel support multiqueue tap before creating more queues. Two new functions tap_fd_enable() and tap_fd_disable() were introduced to enable and disable a specific queue. Since the multiqueue is only supported in Linux, return error on other platforms. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01tap: factor out common tap initializationJason Wang1-57/+73
This patch factors out the common initialization of tap into a new helper net_init_tap_one(). This will be used by multiqueue tap patches. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01tap: import linux multiqueue constantsJason Wang1-0/+4
Import multiqueue constants from if_tun.h from 3.8-rc3. A new ifr flag IFF_MULTI_QUEUE were introduced to create a multiqueue backend by calling TUNSETIFF with the this flag and with the same interface name many times. A new ioctl TUNSETQUEUE were introduced. When doing this ioctl with IFF_DETACH_QUEUE, the queue were disabled in the linux kernel. When doing this ioctl with IFF_ATTACH_QUEUE, the queue were enabled in the linux kernel. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01net: multiqueue supportJason Wang1-32/+81
This patch adds basic multiqueue support for qemu. The idea is simple, an array of NetClientStates were introduced in NICState, parse_netdev() were extended to find and match all NetClientStates belongs to the backend and place their pointers in NICConf. Then qemu_new_nic can setup a N:N mapping between NICStates that belongs to a nic and NICStates belongs to the netdev. And a queue_index were introduced in NetClientState to track its index. After this, each peers of a NICState were abstracted as a queue. After this change, all NetClientState that belongs to the same backend/nic has the same id. When use want to change the link status, all NetClientStates that belongs to the same backend/nic will be also changed. When user want to delete a device or netdev, all NetClientStates that belongs to the same backend/nic will be deleted also. Changing or deleting an specific queue is not allowed. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01net: introduce NetClientState destructorJason Wang1-4/+13
To allow allocating an array of NetClientState and free it once, this patch introduces destructor of NetClientState. Which could do type specific free, which could be used by multiqueue to free the array once. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01net: introduce qemu_net_client_setup()Jason Wang1-10/+19
This patch separates the setup of NetClientState from its allocation, this will allow allocating an arrays of NetClientState and does the initialization one by one which is what multiqueue needs. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01net: introduce qemu_find_net_clients_except()Jason Wang1-0/+21
In multiqueue, all NetClientState that belongs to the same netdev or nic has the same id. So this patches introduces an helper qemu_find_net_clients_except() which finds all NetClientState with the same id. This will be used by multiqueue networking. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01net: intorduce qemu_del_nic()Jason Wang1-1/+14
To support multiqueue nic, this patch separate the nic destructor from qemu_del_net_client() to a new helper qemu_del_nic() since the mapping bettween NiCState and NetClientState were not 1:1 in multiqueue. The following patches would refactor this function to support multiqueue nic. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01net: introduce qemu_get_nic()Jason Wang1-4/+16
To support multiqueue, this patch introduces a helper qemu_get_nic() to get NICState from a NetClientState. The following patches would refactor this helper to support multiqueue. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01net: introduce qemu_get_queue()Jason Wang1-0/+5
To support multiqueue, the patch introduce a helper qemu_get_queue() which is used to get the NetClientState of a device. The following patches would refactor this helper to support multiqueue. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01net: tap: use abort() instead of assert(0)Jason Wang2-3/+3
Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01net: tap: using bool instead of bitfieldJason Wang2-23/+21
Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-30g_strdup(NULL) returns NULL; simplifyMarkus Armbruster1-3/+1
Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-01-17HMP: add QDict to info callback handlerWenchao Xia2-2/+2
This patch change all info call back function to take additional QDict * parameter, which allow those command take parameter. Now it is set to NULL at default case. Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-01-12qemu-option: move standard option definitions out of qemu-config.cPaolo Bonzini1-0/+26
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-22net: add missing include fileLiming Wang1-0/+1
To fix building error: CC net/vde.o net/vde.c: In function ‘vde_cleanup’: net/vde.c:65:5: error: implicit declaration of function ‘qemu_set_fd_handler’ [-Werror=implicit-function-declaration] net/vde.c:65:5: error: nested extern declaration of ‘qemu_set_fd_handler’ [-Werror=nested-externs] cc1: all warnings being treated as errors Signed-off-by: Liming Wang <walimisdev@gmail.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-12-22net: Add missing include statement (fix compiler warnings for MinGW)Stefan Weil1-0/+1
These and some more compiler warnings were caused by a recent commit: net/tap-win32.c:724: warning: no previous prototype for ‘tap_has_ufo’ net/tap-win32.c:729: warning: no previous prototype for ‘tap_has_vnet_hdr’ ... Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-12-19Merge remote-tracking branch 'bonzini/header-dirs' into stagingAnthony Liguori23-215/+1114
* bonzini/header-dirs: (45 commits) janitor: move remaining public headers to include/ hw: move executable format header files to hw/ fpu: move public header file to include/fpu softmmu: move remaining include files to include/ subdirectories softmmu: move include files to include/sysemu/ misc: move include files to include/qemu/ qom: move include files to include/qom/ migration: move include files to include/migration/ monitor: move include files to include/monitor/ exec: move include files to include/exec/ block: move include files to include/block/ qapi: move include files to include/qobject/ janitor: add guards to headers qapi: make struct Visitor opaque qapi: remove qapi/qapi-types-core.h qapi: move inclusions of qemu-common.h from headers to .c files ui: move files to ui/ and include/ui/ qemu-ga: move qemu-ga files to qga/ net: reorganize headers net: move net.c to net/ ... Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-12-19softmmu: move remaining include files to include/ subdirectoriesPaolo Bonzini1-1/+1
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19softmmu: move include files to include/sysemu/Paolo Bonzini5-5/+5
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19misc: move include files to include/qemu/Paolo Bonzini12-19/+19
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19monitor: move include files to include/monitor/Paolo Bonzini5-5/+5
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19qapi: move include files to include/qobject/Paolo Bonzini1-1/+1
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19net: reorganize headersPaolo Bonzini21-188/+25
Move public headers to include/net, and leave private headers in net/. Put the virtio headers in include/net/tap.h, removing the multiple copies that existed. Leave include/net/tap.h as the interface for NICs, and net/tap_int.h as the interface for OS-specific parts of the tap backend. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19net: move net.c to net/Paolo Bonzini2-1/+1057
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19janitor: do not include qemu-char everywherePaolo Bonzini4-3/+1
Touching char/char.h basically causes the whole of QEMU to be rebuilt. Avoid this, it is usually unnecessary. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-18net, hub: fix the indent in the commentsZhi Yong Wu1-1/+1
Remove some redundant blanks in the comments of net_hub_id_for_client(). Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2012-12-12tap: reset vnet header size on openMichael S. Tsirkin1-0/+8
For tap, we currently assume the vnet header size is 10 (the default value) but that might not be the case if tap is persistent and has been used by qemu previously. To fix, set vnet header size correctly on open. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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