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[libvirt] [v8 0/6]Write separate module for hostdev passthrough
by Chunyan Liu 19 Dec '13

19 Dec '13

These patches implements a separate module for hostdev passthrough so that it could be shared by different drivers and can maintain a global state of a host device. patch 1/6: extract hostdev passthrough function from qemu_hostdev.c and make it reusable by multiple drivers. patch 2/6: add a unit test for hostdev common library. patch 3/6: switch qemu driver to use the common library instead of its own hostdev passthrough APIs. patch 4/6: switch lxc driver to use the common library instead of its own hostdev passthrough APIs. patch 5/6: add a hostdev pci backend type for xen usage. patch 6/6: add pci passthrough to libxl driver. --- Changes: * fix v7 comments * reorganize order of patches * rebase to latest source code Chunyan Liu (6): add hostdev passthrough common library add a unit test for hostdev common library change qemu driver to use hostdev common library change lxc driver to use hostdev common library add hostdev pci backend type for xen add pci passthrough to libxl driver docs/schemas/domaincommon.rng | 1 + po/POTFILES.in | 3 +- src/Makefile.am | 3 +- src/conf/domain_conf.c | 3 +- src/conf/domain_conf.h | 1 + src/libvirt_private.syms | 21 + src/libxl/libxl_conf.c | 63 + src/libxl/libxl_conf.h | 4 + src/libxl/libxl_domain.c | 9 + src/libxl/libxl_driver.c | 448 +++++- src/lxc/lxc_conf.h | 4 - src/lxc/lxc_driver.c | 47 +- src/lxc/lxc_hostdev.c | 413 ----- src/lxc/lxc_hostdev.h | 43 - src/lxc/lxc_process.c | 24 +- src/qemu/qemu_command.c | 4 +- src/qemu/qemu_conf.h | 9 +- src/qemu/qemu_domain.c | 22 + src/qemu/qemu_driver.c | 81 +- src/qemu/qemu_hostdev.c | 1454 ----------------- src/qemu/qemu_hostdev.h | 76 - src/qemu/qemu_hotplug.c | 136 +- src/qemu/qemu_process.c | 40 +- src/util/virhostdev.c | 1703 ++++++++++++++++++++ src/util/virhostdev.h | 134 ++ src/util/virpci.c | 30 +- src/util/virpci.h | 9 +- src/util/virscsi.c | 28 +- src/util/virscsi.h | 8 +- src/util/virusb.c | 29 +- src/util/virusb.h | 8 +- tests/Makefile.am | 5 + .../qemuxml2argv-hostdev-pci-address.xml | 1 + .../qemuxml2argvdata/qemuxml2argv-net-hostdev.xml | 1 + tests/qemuxml2argvdata/qemuxml2argv-pci-rom.xml | 2 + tests/virhostdevtest.c | 481 ++++++ tests/virpcimock.c | 45 +- 37 files changed, 3181 insertions(+), 2212 deletions(-) delete mode 100644 src/lxc/lxc_hostdev.c delete mode 100644 src/lxc/lxc_hostdev.h delete mode 100644 src/qemu/qemu_hostdev.c delete mode 100644 src/qemu/qemu_hostdev.h create mode 100644 src/util/virhostdev.c create mode 100644 src/util/virhostdev.h create mode 100644 tests/virhostdevtest.c

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[libvirt] [v7 0/6] Write separate module for hostdev passthrough
by Chunyan Liu 19 Dec '13

19 Dec '13

These patches implements a separate module for hostdev passthrough so that it could be shared by different drivers and can maintain a global state of a host device. patch 1/6: extract hostdev passthrough function from qemu_hostdev.c and make it reusable by multiple drivers. patch 2/6: switch qemu driver to use the common library instead of its own hostdev passthrough APIs. patch 3/6: switch lxc driver to use the common library instead of its own hostdev passthrough APIs. patch 4/6: add a unit test for hostdev common library, based on virpcimock. patch 5/6: add a hostdev pci backend type for xen usage. For xen, the default stub driver would be 'pciback'. patch 6/6: add pci passthrough to libxl driver. --- Changes: * fix v6 comments * rebase to latest source code * add unit test for hostdev common library Chunyan Liu (6): add hostdev passthrough common library change qemu driver to use hostdev common library change lxc driver to use hostdev common library add unit test for hostdev common library add hostdev pci backend type for xen add pci passthrough to libxl driver docs/schemas/domaincommon.rng | 1 + po/POTFILES.in | 3 +- src/Makefile.am | 3 +- src/conf/domain_conf.c | 3 +- src/conf/domain_conf.h | 1 + src/libvirt_private.syms | 21 + src/libxl/libxl_conf.c | 63 ++ src/libxl/libxl_conf.h | 4 + src/libxl/libxl_domain.c | 9 + src/libxl/libxl_driver.c | 448 +++++++++++- src/lxc/lxc_conf.h | 4 - src/lxc/lxc_driver.c | 47 +- src/lxc/lxc_hostdev.c | 413 ---------- src/lxc/lxc_hostdev.h | 43 - src/lxc/lxc_process.c | 24 +- src/qemu/qemu_command.c | 4 +- src/qemu/qemu_conf.h | 9 +- src/qemu/qemu_domain.c | 22 + src/qemu/qemu_driver.c | 81 +-- src/qemu/qemu_hostdev.c | 1454 ----------------------------------- src/qemu/qemu_hostdev.h | 76 -- src/qemu/qemu_hotplug.c | 136 ++-- src/qemu/qemu_process.c | 40 +- src/util/virhostdev.c | 1703 +++++++++++++++++++++++++++++++++++++++++ src/util/virhostdev.h | 134 ++++ src/util/virpci.c | 30 +- src/util/virpci.h | 9 +- src/util/virscsi.c | 28 +- src/util/virscsi.h | 8 +- src/util/virusb.c | 29 +- src/util/virusb.h | 8 +- tests/Makefile.am | 5 + tests/virhostdevtest.c | 481 ++++++++++++ tests/virpcimock.c | 45 ++- 34 files changed, 3177 insertions(+), 2212 deletions(-) delete mode 100644 src/lxc/lxc_hostdev.c delete mode 100644 src/lxc/lxc_hostdev.h delete mode 100644 src/qemu/qemu_hostdev.c delete mode 100644 src/qemu/qemu_hostdev.h create mode 100644 src/util/virhostdev.c create mode 100644 src/util/virhostdev.h create mode 100644 tests/virhostdevtest.c

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[libvirt] Implementation deficiency in virInitctlSetRunLevel
by Reco 18 Dec '13

18 Dec '13

Hello, list. I was pointed here by maintainer of libvirt package in Debian, Guido Günther. For the sake of completeness, the original bug report can be viewed at this link: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=732394 To sum up the bug report, current implementation of virInitctlSetRunLevel function (src/util/virinitctl.c) lacks any sanity checks before writing to container's /dev/initctl. In the absence of such checks, libvirtd can be easily tricked to write runlevel check request to an arbitrary main hosts' file (including hosts' /run/initctl, as described in the bug report). All it takes is one symlink in place of containers' /dev/initctl. I've checked current libvirtd's git, and it seems to me that the problem is still here. Attached to this letter is a patch which tries to mitigate the issue by checking whenever container's /dev/initctl is a pipe actually. Sincerely yours, Reco PS I'm not subscribed to this list, in case of further questions please CC me.

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[libvirt] [PATCH] Remove stray semicolon after pragma macros
by Daniel P. Berrange 18 Dec '13

18 Dec '13

The VIR_WARNINGS_NO_CAST_ALIGN / VIR_WARNINGS_RESET should not have any trailing ';' since they are pragmas. The use of a ';' results in an empty statement which confuses CIL. Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com> --- src/nwfilter/nwfilter_dhcpsnoop.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/nwfilter/nwfilter_dhcpsnoop.c b/src/nwfilter/nwfilter_dhcpsnoop.c index e8fcfef..a96a790 100644 --- a/src/nwfilter/nwfilter_dhcpsnoop.c +++ b/src/nwfilter/nwfilter_dhcpsnoop.c @@ -981,9 +981,9 @@ virNWFilterSnoopDHCPDecode(virNWFilterSnoopReqPtr req, /* go through the protocol headers */ switch (ntohs(pep->eh_type)) { case ETHERTYPE_IP: - VIR_WARNINGS_NO_CAST_ALIGN; + VIR_WARNINGS_NO_CAST_ALIGN pip = (struct iphdr *) pep->eh_data; - VIR_WARNINGS_RESET; + VIR_WARNINGS_RESET len -= offsetof(virNWFilterSnoopEthHdr, eh_data); break; default: -- 1.8.4.2

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[libvirt] [PATCH 0/2] undefine with storage fixes
by Peter Krempa 18 Dec '13

18 Dec '13

Two fixes related to the virsh undefine --storage command. Peter Krempa (2): virsh: man: Mention that volumes need to be in storage pool for undefine virsh: domain: Fix undefine with storage of 'volume' disks tools/virsh-domain.c | 36 ++++++++++++++++++++++++++++++++++-- tools/virsh.pod | 3 ++- 2 files changed, 36 insertions(+), 3 deletions(-) -- 1.8.5.1

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[libvirt] [PATCH] Fix crash in virsystemdtest with dbus 1.7.6
by Cédric Bosdonnat 18 Dec '13

18 Dec '13

D-bus introduced some changes in its locking code. Overriding the init function skips the new locking init and thus crashes later in libvirt test. Removing the function makes the test pass again. --- tests/virsystemdmock.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/tests/virsystemdmock.c b/tests/virsystemdmock.c index b8fc031..b3b82b4 100644 --- a/tests/virsystemdmock.c +++ b/tests/virsystemdmock.c @@ -31,11 +31,6 @@ void dbus_connection_set_change_sigpipe(dbus_bool_t will_modify_sigpipe ATTRIBUT { } -dbus_bool_t dbus_threads_init_default(void) -{ - return 1; -} - DBusConnection *dbus_bus_get(DBusBusType type ATTRIBUTE_UNUSED, DBusError *error ATTRIBUTE_UNUSED) { -- 1.8.4.4

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[libvirt] python pypi package - backport older version?
by Jason Antman 18 Dec '13

18 Dec '13

Hello, First off, thanks for the wonderful project, and thanks even more for all of the excellent work on the Python bindings lately. I'm working on a small project to collect data on kvm hosts/guests via a python collector client and display the data in a web interface. It works beautifully when using my various distros' OS packages for libvirt-python, but I've hit a bit of a snag when trying to do automated testing. I'm quite happy to see libvirt-python packaged as a python package and on pypi, but the version there is 1.2.0, which requires libvirt >= 0.9.11. Unfortunately, I was planning to test my python app on travis-ci, which runs Ubuntu Precise (12.04 LTS), and the latest version of libvirt for that is 0.9.8 (package python-libvirt 0.9.8-2ubuntu17.13). If I were to submit a patch, would there be any interest in me backporting the setup.py/packaging work to an older version of the python bindings - say 0.9.8 - and getting it published on pypi? Thanks, Jason Antman CMGdigital Atlanta, GA

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[libvirt] [PATCH v2] libxl: libxl_get_max_cpus returning a libxl error from 4.4 onward
by Dario Faggioli 18 Dec '13

18 Dec '13

Starting from commit 2e82c18c in Xen (will be included in Xen 4.4) both libxl_get_max_cpus() and libxl_get_max_ndoes() start returning a proper libxl error code, in case of failure. This patch fixes this in the libxl driver. Note that, although it is now basically impossible for them to return 0, that would, theoretically, still be wrong. Also, checking that the returned value is '<= 0' makes the code correct for both Xen 4.4 and Xen 4.3 (and 4.2), and that is why we go for it (rather than just '< 0'). Signed-off-by: Dario Faggioli <dario.faggioli(a)citrix.com> Cc: Jim Fehlig <jfehlig(a)suse.com> Cc: Ian Jackson <Ian.Jackson(a)eu.citrix.com> Cc: Martin Kletzander <mkletzan(a)redhat.com> --- Changes from v1: * taking care of libxl_get_max_nodes() too --- src/libxl/libxl_driver.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/src/libxl/libxl_driver.c b/src/libxl/libxl_driver.c index 692c3b7..29aa6c7 100644 --- a/src/libxl/libxl_driver.c +++ b/src/libxl/libxl_driver.c @@ -1101,9 +1101,11 @@ libxlConnectGetMaxVcpus(virConnectPtr conn, const char *type ATTRIBUTE_UNUSED) cfg = libxlDriverConfigGet(driver); ret = libxl_get_max_cpus(cfg->ctx); - /* libxl_get_max_cpus() will return 0 if there were any failures, - e.g. xc_physinfo() failing */ - if (ret == 0) + /* On failure, libxl_get_max_cpus() will return ERROR_FAIL from Xen 4.4 + * onward, but it ever returning 0 is obviously wrong too (and it is + * what happens, on failure, on Xen 4.3 and earlier). Therefore, a 'less + * or equal' is the catchall we want. */ + if (ret <= 0) ret = -1; virObjectUnref(cfg); @@ -3980,6 +3982,7 @@ libxlDomainGetNumaParameters(virDomainPtr dom, for (i = 0; i < LIBXL_NUMA_NPARAM && i < *nparams; i++) { virMemoryParameterPtr param = &params[i]; + int numnodes; switch (i) { case 0: @@ -3998,8 +4001,12 @@ libxlDomainGetNumaParameters(virDomainPtr dom, /* Node affinity */ /* Let's allocate both libxl and libvirt bitmaps */ + numnodes = libxl_get_max_nodes(priv->ctx); + if (numnodes <= 0) + goto cleanup; + if (libxl_node_bitmap_alloc(priv->ctx, &nodemap, 0) || - !(nodes = virBitmapNew(libxl_get_max_nodes(priv->ctx)))) { + !(nodes = virBitmapNew(numnodes))) { virReportOOMError(); goto cleanup; }

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[libvirt] [PATCH] Remove redefinition of bool type when --enable-test-locking
by Daniel P. Berrange 18 Dec '13

18 Dec '13

Old versions of CIL did not understand the 'bool' data type, but at least 1.7.3 does now cope. We can remove the old hack which redefined bool and no longer compiles successfully. Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com> --- configure.ac | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/configure.ac b/configure.ac index 5446634..675f1fc 100644 --- a/configure.ac +++ b/configure.ac @@ -2129,7 +2129,7 @@ AC_ARG_ENABLE([test-locking], enable_locking=$enableval if test "$enable_locking" = "yes"; then - LOCK_CHECKING_CFLAGS="-Dbool=char -D_Bool=char -save-temps" + LOCK_CHECKING_CFLAGS="-save-temps" AC_SUBST([LOCK_CHECKING_CFLAGS]) fi AM_CONDITIONAL([WITH_CIL],[test "$enable_locking" = "yes"]) -- 1.8.4.2

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[libvirt] libxl: cannot connect to PV console
by Dario Faggioli 18 Dec '13

18 Dec '13

Hey Jim, I'm on libvirt.git's trunk and I see the following: [xen@ghoul3 libvirt.git]$ sudo ./tools/virsh list Id Name State ---------------------------------------------------- 3 debian_32 running 4 fedora20_64 running [xen@ghoul3 libvirt.git]$ sudo ./tools/virsh console debian_32 Connected to domain debian_32 Escape character is ^] error: internal error: cannot find character device (null) [xen@ghoul3 libvirt.git]$ sudo ./tools/virsh console fedora20_64 Connected to domain fedora20_64 Escape character is ^] error: internal error: cannot find character device (null) And this: [xen@ghoul3 libvirt.git]$ sudo ./daemon/libvirtd -v [sudo] password for xen: 2013-12-17 13:19:35.366+0000: 22124: info : libvirt version: 1.2.1 2013-12-17 14:00:06.587+0000: 22122: error : libxlDomainOpenConsole:3885 : internal error: cannot find character device (null) 2013-12-17 14:00:15.705+0000: 22125: error : libxlDomainOpenConsole:3885 : internal error: cannot find character device (null) What I have in /var/log/libvirt/libxl does not look useful, while below it comes my xenstore-ls. What is it that is going wrong? [xen@ghoul3 libvirt.git]$ sudo xenstore-ls tool = "" xenstored = "" local = "" domain = "" 0 = "" name = "Domain-0" domid = "0" device-model = "" 0 = "" state = "running" memory = "" target = "13118716" static-max = "4294967292" freemem-slack = "317576" libxl = "" disable_udev = "1" backend = "" vbd = "" 3 = "" 51712 = "" frontend = "/local/domain/3/device/vbd/51712" params = "/dev/fedora_ghoul3/debian_32" script = "/etc/xen/scripts/block" physical-device = "fd:2" frontend-id = "3" online = "1" removable = "1" bootable = "1" state = "4" dev = "xvda" type = "phy" mode = "w" device-type = "disk" feature-flush-cache = "1" feature-discard = "0" feature-barrier = "1" feature-persistent = "1" feature-max-indirect-segments = "256" sectors = "10485760" info = "0" sector-size = "512" physical-sector-size = "512" 4 = "" 51712 = "" frontend = "/local/domain/4/device/vbd/51712" params = "/dev/fedora_ghoul3/fedora20_64" script = "/etc/xen/scripts/block" physical-device = "fd:3" frontend-id = "4" online = "1" removable = "1" bootable = "1" state = "4" dev = "xvda" type = "phy" mode = "w" device-type = "disk" feature-flush-cache = "1" feature-discard = "0" feature-barrier = "1" feature-persistent = "1" feature-max-indirect-segments = "256" sectors = "10485760" info = "0" sector-size = "512" physical-sector-size = "512" console = "" 3 = "" 0 = "" frontend = "/local/domain/3/console" frontend-id = "3" online = "1" state = "1" domain = "debian_32" protocol = "vt100" 4 = "" 0 = "" frontend = "/local/domain/4/console" frontend-id = "4" online = "1" state = "1" domain = "fedora20_64" protocol = "vt100" vif = "" 3 = "" 0 = "" frontend = "/local/domain/3/device/vif/0" frontend-id = "3" online = "1" state = "4" script = "/etc/xen/scripts/vif-bridge" mac = "00:16:3e:9f:ea:e6" bridge = "virbr0" handle = "0" type = "vif" feature-sg = "1" feature-gso-tcpv4 = "1" feature-rx-copy = "1" feature-rx-flip = "0" feature-split-event-channels = "1" hotplug-status = "connected" 4 = "" 0 = "" frontend = "/local/domain/4/device/vif/0" frontend-id = "4" online = "1" state = "4" script = "/etc/xen/scripts/vif-bridge" mac = "00:16:3e:a8:fd:05" bridge = "virbr0" handle = "0" type = "vif" feature-sg = "1" feature-gso-tcpv4 = "1" feature-rx-copy = "1" feature-rx-flip = "0" feature-split-event-channels = "1" hotplug-status = "connected" 3 = "" vm = "/vm/d3c586b2-f26d-4671-a6b3-6782fa01f49f" name = "debian_32" cpu = "" 0 = "" availability = "online" 1 = "" availability = "online" memory = "" static-max = "1048576" target = "1048577" videoram = "-1" device = "" suspend = "" event-channel = "" vbd = "" 51712 = "" backend = "/local/domain/0/backend/vbd/3/51712" backend-id = "0" state = "4" virtual-device = "51712" device-type = "disk" protocol = "x86_32-abi" ring-ref = "8" event-channel = "15" feature-persistent = "1" vif = "" 0 = "" backend = "/local/domain/0/backend/vif/3/0" backend-id = "0" state = "4" handle = "0" mac = "00:16:3e:9f:ea:e6" tx-ring-ref = "9" rx-ring-ref = "10" event-channel-tx = "16" event-channel-rx = "17" request-rx-copy = "1" feature-rx-notify = "1" feature-sg = "1" feature-gso-tcpv4 = "1" control = "" shutdown = "" platform-feature-multiprocessor-suspend = "1" platform-feature-xs_reset_watches = "1" data = "" domid = "3" store = "" port = "1" ring-ref = "1353957" console = "" backend = "/local/domain/0/backend/console/3/0" backend-id = "0" limit = "1048576" type = "xenconsoled" output = "pty" tty = "/dev/pts/2" port = "2" ring-ref = "2366273" 4 = "" vm = "/vm/d02acb9a-e99e-42ca-b2a4-9e32a65b9a0f" name = "fedora20_64" cpu = "" 0 = "" availability = "online" 1 = "" availability = "online" memory = "" static-max = "2097152" target = "2097153" videoram = "-1" device = "" suspend = "" event-channel = "" vbd = "" 51712 = "" backend = "/local/domain/0/backend/vbd/4/51712" backend-id = "0" state = "4" virtual-device = "51712" device-type = "disk" protocol = "x86_64-abi" ring-ref = "8" event-channel = "15" feature-persistent = "1" vif = "" 0 = "" backend = "/local/domain/0/backend/vif/4/0" backend-id = "0" state = "4" handle = "0" mac = "00:16:3e:a8:fd:05" tx-ring-ref = "135" rx-ring-ref = "136" event-channel-tx = "16" event-channel-rx = "17" request-rx-copy = "1" feature-rx-notify = "1" feature-sg = "1" feature-gso-tcpv4 = "1" control = "" shutdown = "" platform-feature-multiprocessor-suspend = "1" platform-feature-xs_reset_watches = "1" data = "" domid = "4" store = "" port = "1" ring-ref = "2486615" console = "" backend = "/local/domain/0/backend/console/4/0" backend-id = "0" limit = "1048576" type = "xenconsoled" output = "pty" tty = "/dev/pts/4" port = "2" ring-ref = "1364170" vm = "" 00000000-0000-0000-0000-000000000000 = "" memory = "12811" d3c586b2-f26d-4671-a6b3-6782fa01f49f = "" uuid = "d3c586b2-f26d-4671-a6b3-6782fa01f49f" name = "debian_32" image = "" ostype = "linux" kernel = "/var/run/xen/bootloader.3.d/boot_kernel.eYl1YW" ramdisk = "/var/run/xen/bootloader.3.d/boot_ramdisk.BxZLo9" cmdline = "root=UUID=9df3cd14-ed12-4cee-a252-d0cd29f75b55 ro quiet" start_time = "1387288160.47" d02acb9a-e99e-42ca-b2a4-9e32a65b9a0f = "" uuid = "d02acb9a-e99e-42ca-b2a4-9e32a65b9a0f" name = "fedora20_64" image = "" ostype = "linux" kernel = "/var/run/xen/bootloader.4.d/boot_kernel.w1Ntxo" ramdisk = "/var/run/xen/bootloader.4.d/boot_ramdisk.XU7an0" cmdline = "root=/dev/mapper/fedora-root ro rd.lvm.lv=fedora/swap rd.lvm.lv=fedora/root vconsole.font=latarcyrheb-sun16 LANG=en_US.UTF-8" start_time = "1387288245.20" libxl = "" 3 = "" dm-version = "qemu_xen" 4 = "" dm-version = "qemu_xen" Regards, Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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