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2013-01-25block: return count of dirty sectors, not chunksPaolo Bonzini3-5/+4
Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-01-25mirror: perform COW if the cluster size is bigger than the granularityPaolo Bonzini5-23/+109
When mirroring runs, the backing files for the target may not yet be ready. However, this means that a copy-on-write operation on the target would fill the missing sectors with zeros. Copy-on-write only happens if the granularity of the dirty bitmap is smaller than the cluster size (and only for clusters that are allocated in the source after the job has started copying). So far, the granularity was fixed to 1MB; to avoid the problem we detected the situation and required the backing files to be available in that case only. However, we want to lower the granularity for efficiency, so we need a better solution. The solution is to always copy a whole cluster the first time it is touched. The code keeps a bitmap of clusters that have already been allocated by the mirroring job, and only does "manual" copy-on-write if the chunk being copied is zero in the bitmap. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-01-25block: make round_to_clusters publicPaolo Bonzini2-8/+12
This is needed in the following patch. Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-01-25block: implement dirty bitmap using HBitmapPaolo Bonzini5-86/+33
This actually uses the dirty bitmap in the block layer, and converts mirroring to use an HBitmapIter. Reviewed-by: Laszlo Ersek <lersek@redhat.com> (except block/mirror.c parts) Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-01-25add hierarchical bitmap data type and test casesPaolo Bonzini6-1/+1024
HBitmaps provides an array of bits. The bits are stored as usual in an array of unsigned longs, but HBitmap is also optimized to provide fast iteration over set bits; going from one bit to the next is O(logB n) worst case, with B = sizeof(long) * CHAR_BIT: the result is low enough that the number of levels is in fact fixed. In order to do this, it stacks multiple bitmaps with progressively coarser granularity; in all levels except the last, bit N is set iff the N-th unsigned long is nonzero in the immediately next level. When iteration completes on the last level it can examine the 2nd-last level to quickly skip entire words, and even do so recursively to skip blocks of 64 words or powers thereof (32 on 32-bit machines). Given an index in the bitmap, it can be split in group of bits like this (for the 64-bit case): bits 0-57 => word in the last bitmap | bits 58-63 => bit in the word bits 0-51 => word in the 2nd-last bitmap | bits 52-57 => bit in the word bits 0-45 => word in the 3rd-last bitmap | bits 46-51 => bit in the word So it is easy to move up simply by shifting the index right by log2(BITS_PER_LONG) bits. To move down, you shift the index left similarly, and add the word index within the group. Iteration uses ffs (find first set bit) to find the next word to examine; this operation can be done in constant time in most current architectures. Setting or clearing a range of m bits on all levels, the work to perform is O(m + m/W + m/W^2 + ...), which is O(m) like on a regular bitmap. When iterating on a bitmap, each bit (on any level) is only visited once. Hence, The total cost of visiting a bitmap with m bits in it is the number of bits that are set in all bitmaps. Unless the bitmap is extremely sparse, this is also O(m + m/W + m/W^2 + ...), so the amortized cost of advancing from one bit to the next is usually constant. Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-01-25host-utils: add ffslPaolo Bonzini1-0/+26
We can provide fast versions based on the other functions defined by host-utils.h. Some care is required on glibc, which provides ffsl already. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-01-24Merge remote-tracking branch 'bonzini/scsi-next' into stagingAnthony Liguori1-10/+41
# By Paolo Bonzini (1) and Peter Lieven (1) # Via Paolo Bonzini * bonzini/scsi-next: iscsi: add support for iovectors iscsi: do not leak acb->buf when commands are aborted
2013-01-24Revert "serial: fix retry logic"Michael Tokarev1-3/+1
This reverts commit 67c5322d7000fd105a926eec44bc1765b7d70bdd: I'm not sure if the retry logic has ever worked when not using FIFO mode. I found this while writing a test case although code inspection confirms it is definitely broken. The TSR retry logic will never actually happen because it is guarded by an 'if (s->tsr_rety > 0)' but this is the only place that can ever make the variable greater than zero. That effectively makes the retry logic an 'if (0) I believe this is a typo and the intention was >= 0. Once this is fixed thoug I see double transmits with my test case. This is because in the non FIFO case, serial_xmit may get invoked while LSR.THRE is still high because the character was processed but the retransmit timer was still active. We can handle this by simply checking for LSR.THRE and returning early. It's possible that the FIFO paths also need some attention. Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Even if the previous logic was never worked, new logic breaks stuff - namely, qemu -enable-kvm -nographic -kernel /boot/vmlinuz-$(uname -r) -append console=ttyS0 -serial pty the above command will cause the virtual machine to stuck at startup using 100% CPU till one connects to the pty and sends any char to it. Note this is rather typical invocation for various headless virtual machines by libvirt. So revert this change for now, till a better solution will be found. Signed-off-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-24iscsi: add support for iovectorsPeter Lieven1-9/+34
This patch adds support for directly passing the iovec array from QEMUIOVector if libiscsi supports it (1.8.0 or newer). Signed-off-by: Peter Lieven <pl@kamp.de> [Preserve the improvements from commit 4cc841b, iscsi: partly avoid iovec linearization in iscsi_aio_writev, 2012-11-19 - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-01-24iscsi: do not leak acb->buf when commands are abortedPaolo Bonzini1-1/+7
acb->buf is freed in the WRITE(16) callback, but this may not get called at all when commands are aborted. Add another free in the ABORT TASK callback, which requires setting acb->buf to NULL everywhere. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-01-24target-cris: Fix typo in D_LOG() macroAndreas Färber2-2/+2
It's __VA_ARGS__. Fixes the build with CRIS_[OP_]HELPER_DEBUG defined. Broken since r6338 / 93fcfe39a0383377e647b821c9f165fd927cd4e0 (Convert references to logfile/loglevel to use qemu_log*() macros). Cc: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2013-01-24trivial: etraxfs_eth: Eliminate checkpatch errorsGrant Likely1-456/+466
This is a trivial patch to harmonize the coding style on hw/etraxfs_eth.c. This is in preparation to split off the bitbang mdio code into a separate file. Cc: Peter Maydell <peter.maydell@linaro.org> Cc: Paul Brook <paul@codesourcery.com> Cc: Edgar E. Iglesias <edgar.iglesias@gmail.com> Cc: Anthony Liguori <aliguori@us.ibm.com> Cc: Andreas Färber <afaerber@suse.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2013-01-23Merge remote-tracking branch 'bonzini/scsi-next' into stagingAnthony Liguori4-14/+105
# By Peter Lieven (3) and others # Via Paolo Bonzini * bonzini/scsi-next: scsi: Drop useless null test in scsi_unit_attention() lsi: use qbus_reset_all to reset SCSI bus scsi: fix segfault with 0-byte disk iscsi: add support for iSCSI NOPs [v2] iscsi: partly avoid iovec linearization in iscsi_aio_writev iscsi: add iscsi_create support
2013-01-23Merge remote-tracking branch 'kraxel/usb.77' into stagingAnthony Liguori3-17/+91
# By Gerd Hoffmann # Via Gerd Hoffmann * kraxel/usb.77: usb: add usb-bot device (scsi bulk-only transport). ohci: add missing break Revert "usb-storage: Drop useless null test in usb_msd_handle_data()"
2013-01-23Merge remote-tracking branch 'spice/spice.v68' into stagingAnthony Liguori2-6/+20
# By Alon Levy # Via Gerd Hoffmann * spice/spice.v68: qxl: change rom size to 8192 qxl: stop using non revision 4 rom fields for revision < 4
2013-01-22scsi: Drop useless null test in scsi_unit_attention()Markus Armbruster1-1/+1
req was created by scsi_req_alloc(), which initializes req->dev to a value it dereferences. req->dev isn't changed anywhere else. Therefore, req->dev can't be null. Drop the useless null test; it spooks Coverity. Signed-off-by: Markus Armbruster <armbru@redhat.com>
2013-01-22lsi: use qbus_reset_all to reset SCSI busPaolo Bonzini1-6/+1
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-01-22scsi: fix segfault with 0-byte diskPaolo Bonzini1-2/+2
When a 0-sized disk is found, READ CAPACITY will return a LUN NOT READY error. However, because it returns -1 instead of zero, the HBA will call scsi_req_continue. This will typically cause a segmentation fault or an assertion failure. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-01-22iscsi: add support for iSCSI NOPs [v2]Peter Lieven1-0/+38
This patch will send NOP-Out PDUs every 5 seconds to the iSCSI target. If a consecutive number of NOP-In replies fail a reconnect is initiated. iSCSI NOPs help to ensure that the connection to the target is still operational. This should not, but in reality may be the case even if the TCP connection is still alive if there are bugs in either the target or the initiator implementation. v2: - track the NOPs inside libiscsi so libiscsi can reset the counter in case it initiates a reconnect. Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-01-22iscsi: partly avoid iovec linearization in iscsi_aio_writevPeter Lieven1-5/+11
libiscsi expects all write16 data in a linear buffer. If the iovec only contains one buffer we can skip the linearization step as well as the additional malloc/free and pass the buffer directly. Reported-by: Ronnie Sahlberg <ronniesahlberg@gmail.com> Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-01-22iscsi: add iscsi_create supportPeter Lieven1-0/+52
This patch adds support for bdrv_create. This allows e.g. to use qemu-img to convert from any supported device to an iscsi backed storage as destination. Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-01-22usb: add usb-bot device (scsi bulk-only transport).Gerd Hoffmann2-16/+89
Basically the same as usb-storage, but without automatic scsi device setup. Also features support for up to 16 LUNs. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-01-22ohci: add missing breakGerd Hoffmann1-0/+1
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-01-22qxl: change rom size to 8192Alon Levy1-6/+7
This is a simpler solution to 869981, where migration breaks since qxl's rom bar size has changed. Instead of ignoring fields in QXLRom, which is what has actually changed, we remove some of the modes, a mechanism already accounted for by the guest. The modes left allow for portrait and landscape only modes, corresponding to orientations 0 and 1. Orientations 2 and 3 are dropped. Added assert so that rom size will fit the future QXLRom increases via spice-protocol changes. This patch has been tested with 6.1.0.10015. With the newer 6.1.0.10016 there are problems with both "(flipped)" modes prior to the patch, and the patch loses the ability to set "Portrait" modes. But this is a separate bug to be fixed in the driver, and besides the patch doesn't affect the new arbitrary mode setting functionality. Signed-off-by: Alon Levy <alevy@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-01-22Revert "usb-storage: Drop useless null test in usb_msd_handle_data()"Gerd Hoffmann1-1/+1
This reverts commit a1cbfd554e11bb8af38c2f3e1f1574bf4c563cd2. Test isn't useless. scsi_req_enqueue() may finish the request (will actually happen for requests which don't trigger any I/O such as INQUIRY), then call usb_msd_command_complete() which in turn will set s->req to NULL after unref'ing it. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-01-22qxl: stop using non revision 4 rom fields for revision < 4Alon Levy2-0/+13
Signed-off-by: Alon Levy <alevy@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-01-21sysbus: Drop sysbus_from_qdev() cast macroAndreas Färber76-215/+214
Replace by SYS_BUS_DEVICE() QOM cast macro using a scripted conversion. Avoids the old macro creeping into new code. Resolve a Coding Style warning in openpic code. Signed-off-by: Andreas Färber <afaerber@suse.de> Cc: Anthony Liguori <anthony@codemonkey.ws> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-21vnc: fix possible uninitialized removalsTim Hardeck2-3/+9
Some VncState values are not initialized before the Websocket handshake. If it fails QEMU segfaults during the cleanup. To prevent this behavior intialization checks are added. Signed-off-by: Tim Hardeck <thardeck@suse.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-21vnc: added initial websocket protocol supportTim Hardeck7-21/+591
This patch adds basic Websocket Protocol version 13 - RFC 6455 - support to QEMU VNC. Binary encoding support on the client side is mandatory. Because of the GnuTLS requirement the Websockets implementation is optional (--enable-vnc-ws). To activate Websocket support the VNC option "websocket"is used, for example "-vnc :0,websocket". The listen port for Websocket connections is (5700 + display) so if QEMU VNC is started with :0 the Websocket port would be 5700. As an alternative the Websocket port could be manually specified by using ",websocket=<port>" instead. Parts of the implementation base on Anthony Liguori's QEMU Websocket patch from 2010 and on Joel Martin's LibVNC Websocket implementation. Signed-off-by: Tim Hardeck <thardeck@suse.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-21vnc: added buffer_advance functionTim Hardeck2-4/+10
Following Anthony Liguori's Websocket implementation I have added the buffer_advance function to VNC and replaced all related buffer memmove operations with it. Signed-off-by: Tim Hardeck <thardeck@suse.de> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-21virtio-s390-device: create a virtio-s390-bus during init.KONRAD Frederic2-0/+3
A virtio-s390-bus is created during the init. So one VirtIODevice can be connected on the virtio-s390-device through this bus. Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-21virtio-s390-bus: add virtio-s390-bus.KONRAD Frederic2-0/+46
This add the virtio-s390-bus which extends virtio-bus. So one VirtIODevice can be connected on this bus. Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-21virtio-pci: refactor virtio-pci device.KONRAD Frederic2-2/+139
Create the virtio-pci device which is abstract. This transport device will create a virtio-pci-bus, so one VirtIODevice can be connected. Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-21virtio-pci-bus: introduce virtio-pci-bus.KONRAD Frederic2-0/+52
Introduce virtio-pci-bus, which extends virtio-bus. It is used with virtio-pci transport device. Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-21virtio-device: refactor virtio-device.KONRAD Frederic4-12/+130
Create the virtio-device which is abstract. All the virtio-device can extend this class. It also add some functions to virtio-bus. Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-21virtio-bus: introduce virtio-busKONRAD Frederic3-0/+217
Introduce virtio-bus. Refactored transport device will create a bus which extends virtio-bus. Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-21qdev: add a maximum device allowed field for the bus.KONRAD Frederic2-0/+14
Add a max_dev field to BusClass to specify the maximum amount of devices allowed on the bus (has no effect if max_dev=0) Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-21Merge remote-tracking branch 'quintela/thread.next' into stagingAnthony Liguori5-91/+81
# By Juan Quintela (7) and Paolo Bonzini (6) # Via Juan Quintela * quintela/thread.next: migration: remove argument to qemu_savevm_state_cancel migration: Only go to the iterate stage if there is anything to send migration: unfold rest of migrate_fd_put_ready() into thread migration: move exit condition to migration thread migration: Add buffered_flush error handling migration: move beginning stage to the migration thread qemu-file: Only set last_error if it is not already set migration: fix off-by-one in buffered_rate_limit migration: remove double call to migrate_fd_close migration: make function static use XFER_LIMIT_RATIO consistently Protect migration_bitmap_sync() with the ramlist lock Unlock ramlist lock also in error case
2013-01-21Merge remote-tracking branch 'stefanha/trivial-patches' into stagingAnthony Liguori4-6/+6
# By Stefan Weil (2) and others # Via Stefan Hajnoczi * stefanha/trivial-patches: hw/tpci200: Fix compiler warning (redefined symbol with MinGW) configure: silence pkg-config's check for curses acpitable: open the data file in binary mode hw: Spelling fix in log message
2013-01-21Merge remote-tracking branch 'kraxel/seabios-1.7.2' into stagingAnthony Liguori4-0/+0
# By Gerd Hoffmann # Via Gerd Hoffmann * kraxel/seabios-1.7.2: seabios: update to 1.7.2 release
2013-01-21target-microblaze: Drop unused cpu_mb_close() prototypeAndreas Färber1-1/+0
Such a function never existed. Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2013-01-21target-cris: Drop unused cpu_cris_close() prototypeAndreas Färber1-1/+0
Such a function never existed. Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2013-01-21hw/tpci200: Fix compiler warning (redefined symbol with MinGW)Stefan Weil1-3/+3
STATUS_TIMEOUT is defined in winnt.h: CC hw/tpci200.o hw/tpci200.c:34:0: warning: "STATUS_TIMEOUT" redefined [enabled by default] /usr/lib/gcc/x86_64-w64-mingw32/4.6/../../../../x86_64-w64-mingw32/include/winnt.h:1036:0: note: this is the location of the previous definition Use STATUS_TIME instead of STATUS_TIMEOUT as suggested by Alberto Garcia. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-01-21configure: silence pkg-config's check for cursesVadim Evard1-1/+1
Signed-off-by: Vadim Evard <v.e.evard@gmail.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-01-21acpitable: open the data file in binary modeMichael Tokarev1-1/+1
-acpitable {file|data}=file reads the content of file, but it is in binary form, so the file should be opened usin O_BINARY flag. On *nix it is a no-op, but on windows and other weird platform it is really needed. Signed-off-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-01-21hw: Spelling fix in log messageStefan Weil1-1/+1
defineition -> definition Signed-off-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Andreas F=E4rber <afaerber@suse.de> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-01-21seabios: update to 1.7.2 releaseGerd Hoffmann4-0/+0
Not that many changes as we have a pretty recent git snapshot in master already: Hannes Reinecke (1): megasas: Invert PCI device selection Kevin O'Connor (2): Minor: Separate UUID display from F12 boot prompt. boot: Support "halt" in the boot order to prevent default boot attempts. Laszlo Ersek (1): display_uuid(): fix incomplete check after the loop Paolo Bonzini (1): vgabios: implement AX=1120H..1124H functions
2013-01-20Merge remote-tracking branch 'stefanha/block' into stagingAnthony Liguori9-32/+23
# By Kevin Wolf (4) and others # Via Stefan Hajnoczi * stefanha/block: dataplane: support viostor virtio-pci status bit setting dataplane: avoid reentrancy during virtio_blk_data_plane_stop() win32-aio: use iov utility functions instead of open-coding them win32-aio: Fix memory leak win32-aio: Fix vectored reads aio: Fix return value of aio_poll() ide: Remove wrong assertion block: fix null-pointer bug on error case in block commit
2013-01-19tci: Fix broken build (regression)Stefan Weil1-7/+1
s390x-linux-user now also uses GETPC. Instead of adding it to the list of targets which use GETPC, the macro is now defined unconditionally. This avoids future build regressions like this one: CC s390x-linux-user/target-s390x/int_helper.o cc1: warnings being treated as errors qemu/target-s390x/int_helper.c: In function ‘helper_divs32’: qemu/target-s390x/int_helper.c:47: error: implicit declaration of function ‘GETPC’ qemu/target-s390x/int_helper.c:47: error: nested extern declaration of ‘GETPC’ Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-19block/raw-posix: Make hdev_aio_discard() available outside LinuxAndreas Färber1-13/+13
Fixes the build on OpenBSD among others. Suggested-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Andreas Färber <andreas.faerber@web.de> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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