- Devel - libvirt List Archives

[libvirt] [PATCH 0/3] Keep original file label
by Michal Privoznik 06 Sep '13

06 Sep '13

This is just a resurrection of my previous patchset. As of atomicity problem, I just realized there is none. The qemuProcessHook (which is responsible for locking the files) is called prior virSecurityManagerSetAllLabel (responsible for chown()-ing). Anyway, even if there's still one and it's pre-existing, it shouldn't block this set, should it? Michal Privoznik (3): virFile: Add APIs for extended attributes handling virfile: Introduce internal API for managing ACL security_dac: Favour ACLs over chown() configure.ac | 2 + libvirt.spec.in | 1 + m4/virt-acl.m4 | 9 ++ src/Makefile.am | 4 +- src/libvirt_private.syms | 6 + src/security/security_dac.c | 297 ++++++++++++++++++++++++++++++++++++++----- src/util/virfile.c | 301 ++++++++++++++++++++++++++++++++++++++++++++ src/util/virfile.h | 28 +++++ 8 files changed, 617 insertions(+), 31 deletions(-) create mode 100644 m4/virt-acl.m4 -- 1.8.1.5

2 7

[libvirt] [PATCH] qemu: Remove unnecessary variable assignment
by Hongwei Bi 06 Sep '13

06 Sep '13

Remove unnecessary 'addrs = NULL' in qemuDomainAssignS390Addresses() and qemuDomainAssignPCIAddresses() due to the related Free function in label cleanup. --- src/qemu/qemu_command.c | 2 -- 1 files changed, 0 insertions(+), 2 deletions(-) diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 643532f..3cc9c1d 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -1320,7 +1320,6 @@ qemuDomainAssignS390Addresses(virDomainDefPtr def, qemuDomainCCWAddressSetFree(priv->ccwaddrs); priv->persistentAddrs = 1; priv->ccwaddrs = addrs; - addrs = NULL; } else { priv->persistentAddrs = 0; } @@ -1901,7 +1900,6 @@ qemuDomainAssignPCIAddresses(virDomainDefPtr def, qemuDomainPCIAddressSetFree(priv->pciaddrs); priv->persistentAddrs = 1; priv->pciaddrs = addrs; - addrs = NULL; } else { priv->persistentAddrs = 0; } -- 1.7.1

3 2

[libvirt] [PATCH 1/1] qemu: avoid users specifying CPU features for non-x86 plaftorm.
by Li Zhang 06 Sep '13

06 Sep '13

From: Li Zhang <zhlcindy(a)linux.vnet.ibm.com> Currently, only X86 provides users CPU features with CPUID instruction. If users specify the features for non-x86, it should tell users to remove them. This patch is to report one error if features are specified by users for non-x86 platform. Signed-off-by: Li Zhang <zhlcindy(a)linux.vnet.ibm.com> --- src/qemu/qemu_command.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 91ca86a..1a158e4 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -10644,6 +10644,14 @@ qemuParseCommandLineCPU(virDomainDefPtr dom, if (*feature == '\0') goto syntax; + if (dom->os.arch != VIR_ARCH_X86_64 && + dom->os.arch != VIR_ARCH_I686) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("%s platform doesn't support CPU features'"), + virArchToString(dom->os.arch)); + goto cleanup; + } + if (STREQ(feature, "kvmclock")) { bool present = (policy == VIR_CPU_FEATURE_REQUIRE); size_t j; -- 1.8.1.4

1 0

[libvirt] [PATCH] Docs: fix a typo in virt-login-shell.pod
by Alex Jia 06 Sep '13

06 Sep '13

Signed-off-by: Alex Jia <ajia(a)redhat.com> --- tools/virt-login-shell.pod | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/tools/virt-login-shell.pod b/tools/virt-login-shell.pod index e27d500..bcd7855 100644 --- a/tools/virt-login-shell.pod +++ b/tools/virt-login-shell.pod @@ -11,7 +11,7 @@ B<virt-login-shell> The B<virt-login-shell> program is a setuid shell that is used to join an LXC container that matches the user's name. If the container is not running, virt-login-shell will attempt to start the container. -virt-sandbox-shell is not allowed to be run by root. Normal users will get +virt-login-shell is not allowed to be run by root. Normal users will get added to a container that matches their username, if it exists, and they are configured in /etc/libvirt/virt-login-shell.conf. -- 1.7.1

2 2

[libvirt] [PATCH] domain_conf: Delete the USB controller check from the USB Device checklist on virDomainDeviceIsUSB
by Liuji (Jeremy) 06 Sep '13

06 Sep '13

When using "virsh attach-device" to attach a device, the virDomainDefCompatibleDevice function will check the compatibility. If the device is a USB device, but the VM don't have any USB controller, the execution of "virsh attach-device" will fails. It considers the USB controller as a USB device on virDomainDeviceIsUSB, so we can't use "virsh attach-device" to attach a USB controller for a VM which don't have any other USB controller. >From ec3257407a9c4aadcd4554dcaad00d40387cf488 Mon Sep 17 00:00:00 2001 From: Liu Ji <jeremy.liu(a)huawei.com> Date: Thu, 5 Sep 2013 09:56:42 +0800 Subject: [PATCH] domain_conf: Delete the USB controller check from the USB Device checklist on virDomainDeviceIsUSB Delete the USB controller check from the USB Device checklist on virDomainDeviceIsUSB, otherwise we can't use "virsh attach-device" to attach a USB controller for a VM which don't have any other USB controller. Signed-off-by: Liu Ji <jeremy.liu(a)huawei.com> --- src/conf/domain_conf.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index e3aec69..ffb3254 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -16899,8 +16899,6 @@ virDomainDeviceIsUSB(virDomainDeviceDefPtr dev) int t = dev->type; if ((t == VIR_DOMAIN_DEVICE_DISK && dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_USB) || - (t == VIR_DOMAIN_DEVICE_CONTROLLER && - dev->data.controller->type == VIR_DOMAIN_CONTROLLER_TYPE_USB) || (t == VIR_DOMAIN_DEVICE_INPUT && dev->data.input->type == VIR_DOMAIN_INPUT_BUS_USB) || (t == VIR_DOMAIN_DEVICE_HOSTDEV && -- 1.7.11.7

3 3

[libvirt] virsh domstate output when kvm killed vs guest OS panic
by Chris Friesen 05 Sep '13

05 Sep '13

Hi, If I kill a libvirt-managed kvm process with "kill -9", running "virsh domstate --reason <name>" gives shut off (crashed) Looking at the code, that corresponds to VIR_DOMAIN_SHUTOFF/VIR_DOMAIN_SHUTOFF_CRASHED. The comment says that VIR_DOMAIN_SHUTOFF_CRASHED corresponds to "domain crashed". Is this supposed to be a crash of the hypervisor, or of the guest OS? If I trigger a panic in the guest, it sits there in the panicked state doing nothing and "virsh domstate" gives running (booted) So what's the point of VIR_DOMAIN_CRASHED/VIR_DOMAIN_CRASHED_PANICKED? Chris

2 1

[libvirt] [PATCH 0/2] Only free compiled regex when regcomp() succeeds
by Jim Fehlig 05 Sep '13

05 Sep '13

During a recent discussion about calling regfree() when regcomp() fails, we decided it was best to not call regfree() when compilation fails. https://www.redhat.com/archives/libvir-list/2013-September/msg00262.html The first patch fixes existing infractions throughout the code. I split the second patch out since there were other issues beyond simply removing a call to regfree(). Jim Fehlig (2): Don't call regfree() if regcomp() fails libxl: Compile regular expression where it is used src/libxl/libxl_conf.c | 29 +++++++++++++++-------------- src/storage/storage_backend.c | 2 +- src/storage/storage_backend_logical.c | 1 - src/xen/xen_hypervisor.c | 3 --- 4 files changed, 16 insertions(+), 19 deletions(-) -- 1.8.1.4

2 5

[libvirt] [PATCH] storage: new backend: btrfs subvolumes
by Oskari Saarenmaa 05 Sep '13

05 Sep '13

This commit adds a new storage pool driver, btrfs, which can be used to manage btrfs subvolumes on an existing btrfs filesystem. The driver can create new blank subvolumes and snapshots of existing subvolumes as well as delete existing subvolumes. The subvolumes created are automatically made visible on the host side and can be attached to domains using the <filesystem> tags as defined in 'format domain' documentation. Libvirt volumes do not implement quotas at the moment because the current (btrfs-progs-0.20.rc1.20130501git7854c8b-4.fc20.x86_64) support for quota management in btrfs-progs is lacking the necessary features, for example it's not possible to see the quota assigned to a certain subvolume and usage information is only updated on syncfs(2). Quota support will be implemented once the tools gain the necessary features. Signed-off-by: Oskari Saarenmaa <os(a)ohmu.fi> --- configure.ac | 23 +- docs/drivers.html.in | 1 + docs/schemas/storagepool.rng | 11 + docs/storage.html.in | 60 +++++ include/libvirt/libvirt.h.in | 1 + libvirt.spec.in | 2 + src/Makefile.am | 8 + src/conf/storage_conf.c | 12 +- src/conf/storage_conf.h | 1 + src/storage/storage_backend.c | 6 + src/storage/storage_backend_btrfs.c | 284 ++++++++++++++++++++++ src/storage/storage_backend_btrfs.h | 30 +++ tests/storagepoolxml2xmlin/pool-btrfs.xml | 7 + tests/storagepoolxml2xmlout/pool-btrfs.xml | 17 ++ tests/storagepoolxml2xmltest.c | 1 + tests/storagevolxml2xmlin/vol-btrfs-snapshot.xml | 11 + tests/storagevolxml2xmlin/vol-btrfs.xml | 8 + tests/storagevolxml2xmlout/vol-btrfs-snapshot.xml | 26 ++ tests/storagevolxml2xmlout/vol-btrfs.xml | 17 ++ tests/storagevolxml2xmltest.c | 2 + 20 files changed, 525 insertions(+), 3 deletions(-) create mode 100644 src/storage/storage_backend_btrfs.c create mode 100644 src/storage/storage_backend_btrfs.h create mode 100644 tests/storagepoolxml2xmlin/pool-btrfs.xml create mode 100644 tests/storagepoolxml2xmlout/pool-btrfs.xml create mode 100644 tests/storagevolxml2xmlin/vol-btrfs-snapshot.xml create mode 100644 tests/storagevolxml2xmlin/vol-btrfs.xml create mode 100644 tests/storagevolxml2xmlout/vol-btrfs-snapshot.xml create mode 100644 tests/storagevolxml2xmlout/vol-btrfs.xml diff --git a/configure.ac b/configure.ac index f853e03..100c87d 100644 --- a/configure.ac +++ b/configure.ac @@ -1562,6 +1562,8 @@ AC_ARG_WITH([storage-rbd], AC_HELP_STRING([--with-storage-rbd], [with RADOS Block Device backend for the storage driver @<:@default=check@:>@]),[],[with_storage_rbd=check]) AC_ARG_WITH([storage-sheepdog], AC_HELP_STRING([--with-storage-sheepdog], [with Sheepdog backend for the storage driver @<:@default=check@:>@]),[],[with_storage_sheepdog=check]) +AC_ARG_WITH([storage-btrfs], + AC_HELP_STRING([--with-storage-btrfs], [with Btrfs backend for the storage driver @<:@default=check@:>@]),[],[with_storage_btrfs=check]) if test "$with_libvirtd" = "no"; then with_storage_dir=no @@ -1774,6 +1776,24 @@ fi AM_CONDITIONAL([WITH_STORAGE_SHEEPDOG], [test "$with_storage_sheepdog" = "yes"]) +if test "$with_storage_btrfs" = "yes" || test "$with_storage_btrfs" = "check"; then + AC_PATH_PROG([BTRFS], [btrfs], [], [$PATH:/sbin:/usr/sbin]) + + if test "$with_storage_btrfs" = "yes" ; then + if test -z "$BTRFS" ; then AC_MSG_ERROR([We need btrfs -command for btrfs storage driver]) ; fi + else + if test -z "$BTRFS" ; then with_storage_btrfs=no ; fi + if test "$with_storage_btrfs" = "check" ; then with_storage_btrfs=yes ; fi + fi + + if test "$with_storage_btrfs" = "yes" ; then + AC_DEFINE_UNQUOTED([WITH_STORAGE_BTRFS], 1, [whether Btrfs backend for storage driver is enabled]) + AC_DEFINE_UNQUOTED([BTRFS],["$BTRFS"],[Location of btrfs program]) + fi +fi +AM_CONDITIONAL([WITH_STORAGE_BTRFS], [test "$with_storage_btrfs" = "yes"]) + + LIBPARTED_CFLAGS= LIBPARTED_LIBS= @@ -1861,7 +1881,7 @@ AC_SUBST([DEVMAPPER_CFLAGS]) AC_SUBST([DEVMAPPER_LIBS]) with_storage=no -for backend in dir fs lvm iscsi scsi mpath rbd disk; do +for backend in dir fs lvm iscsi scsi mpath rbd disk btrfs; do if eval test \$with_storage_$backend = yes; then with_storage=yes break @@ -2573,6 +2593,7 @@ AC_MSG_NOTICE([ mpath: $with_storage_mpath]) AC_MSG_NOTICE([ Disk: $with_storage_disk]) AC_MSG_NOTICE([ RBD: $with_storage_rbd]) AC_MSG_NOTICE([Sheepdog: $with_storage_sheepdog]) +AC_MSG_NOTICE([ Btrfs: $with_storage_btrfs]) AC_MSG_NOTICE([]) AC_MSG_NOTICE([Security Drivers]) AC_MSG_NOTICE([]) diff --git a/docs/drivers.html.in b/docs/drivers.html.in index 7aa44f3..d9eb6d7 100644 --- a/docs/drivers.html.in +++ b/docs/drivers.html.in @@ -48,6 +48,7 @@ <li><strong><a href="storage.html#StorageBackendMultipath">Multipath backend</a></strong></li> <li><strong><a href="storage.html#StorageBackendRBD">RBD (RADOS Block Device) backend</a></strong></li> <li><strong><a href="storage.html#StorageBackendSheepdog">Sheepdog backend</a></strong></li> + <li><strong><a href="storage.html#StorageBackendBtrfs">Btrfs subvolume backend</a></strong></li> </ul> </body> </html> diff --git a/docs/schemas/storagepool.rng b/docs/schemas/storagepool.rng index a4ef5af..6435566 100644 --- a/docs/schemas/storagepool.rng +++ b/docs/schemas/storagepool.rng @@ -21,6 +21,7 @@ <ref name='poolmpath'/> <ref name='poolrbd'/> <ref name='poolsheepdog'/> + <ref name='poolbtrfs'/> </choice> </element> </define> @@ -125,6 +126,16 @@ <ref name='sourcesheepdog'/> </define> + <define name='poolbtrfs'> + <attribute name='type'> + <value>btrfs</value> + </attribute> + <ref name='commonmetadata'/> + <ref name='sizing'/> + <ref name='sourcedir'/> + <ref name='target'/> + </define> + <define name='sourceinfovendor'> <optional> <element name='vendor'> diff --git a/docs/storage.html.in b/docs/storage.html.in index 1181444..4d4690c 100644 --- a/docs/storage.html.in +++ b/docs/storage.html.in @@ -114,6 +114,9 @@ <li> <a href="#StorageBackendSheepdog">Sheepdog backend</a> </li> + <li> + <a href="#StorageBackendBtrfs">Btrfs subvolume backend</a> + </li> </ul> <h2><a name="StorageBackendDir">Directory pool</a></h2> @@ -647,5 +650,62 @@ The Sheepdog pool does not use the volume format type element. </p> + <h2><a name="StorageBackendBtrfs">Btrfs subolume pools</a></h2> + <p> + This provides a pool based on a Btrfs filesystem using subvolumes and + optionally their snapshots. Btrfs subvolume pool can be used to create + subvolumes ans snapshots on the host side and the created volumes can + be attached as filesystems to LXC domains. + + The btrfs filesystem must already be formatted and mounted. Subvolume + quotas are not supported at the moment. + + <span class="since">Since 1.1.3</span> + </p> + + <h3>Example pool input</h3> + <pre> + <pool type="btrfs"> + <name>lxcdomains</name> + <target> + <path>/lxc</path> + </target> + </pool></pre> + + <h3>Example volume output</h3> + <pre> + <volume> + <name>vanilla</name> + <key>/lxc/vanilla</key> + <source> + </source> + <capacity unit='bytes'>0</capacity> + <allocation unit='bytes'>0</allocation> + <target> + <path>/lxc/vanilla</path> + <permissions> + <mode>00</mode> + <owner>0</owner> + <group>0</group> + </permissions> + </target> + </volume></pre> + + <h3>Example filesystem attachment</h3> + <p>Btrfs volumes can be attached to LXC guests. Information about + attaching a filesystem to a guest can be found at the + <a href="formatdomain.html#elementsFilesystems">format domain</a> + page.</p> + + <h3>Valid pool format types</h3> + <p> + The Btrfs pool does not use the pool format type element. + </p> + + <h3>Valid volume format types</h3> + <p> + The Btrfs pool does not use the volume format type element. + </p> + </body> </html> diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in index a47e33c..6106ad5 100644 --- a/include/libvirt/libvirt.h.in +++ b/include/libvirt/libvirt.h.in @@ -3028,6 +3028,7 @@ typedef enum { VIR_CONNECT_LIST_STORAGE_POOLS_MPATH = 1 << 13, VIR_CONNECT_LIST_STORAGE_POOLS_RBD = 1 << 14, VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG = 1 << 15, + VIR_CONNECT_LIST_STORAGE_POOLS_BTRFS = 1 << 16, } virConnectListAllStoragePoolsFlags; int virConnectListAllStoragePools(virConnectPtr conn, diff --git a/libvirt.spec.in b/libvirt.spec.in index e94901a..3867b99 100644 --- a/libvirt.spec.in +++ b/libvirt.spec.in @@ -730,6 +730,8 @@ Requires: device-mapper Requires: device-mapper %endif %if %{with_storage_sheepdog} +# For Btrfs storage +Requires: btrfs-progs # For Sheepdog support Requires: sheepdog %endif diff --git a/src/Makefile.am b/src/Makefile.am index 636bcbc..cdcda36 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -789,6 +789,9 @@ STORAGE_DRIVER_RBD_SOURCES = \ STORAGE_DRIVER_SHEEPDOG_SOURCES = \ storage/storage_backend_sheepdog.h storage/storage_backend_sheepdog.c +STORAGE_DRIVER_BTRFS_SOURCES = \ + storage/storage_backend_btrfs.h storage/storage_backend_btrfs.c + STORAGE_HELPER_DISK_SOURCES = \ storage/parthelper.c @@ -1402,6 +1405,10 @@ if WITH_STORAGE_SHEEPDOG libvirt_driver_storage_impl_la_SOURCES += $(STORAGE_DRIVER_SHEEPDOG_SOURCES) endif +if WITH_STORAGE_BTRFS +libvirt_driver_storage_impl_la_SOURCES += $(STORAGE_DRIVER_BTRFS_SOURCES) +endif + if WITH_NODE_DEVICES # Needed to keep automake quiet about conditionals if WITH_DRIVER_MODULES @@ -1594,6 +1601,7 @@ EXTRA_DIST += \ $(STORAGE_DRIVER_DISK_SOURCES) \ $(STORAGE_DRIVER_RBD_SOURCES) \ $(STORAGE_DRIVER_SHEEPDOG_SOURCES) \ + $(STORAGE_DRIVER_BTRFS_SOURCES) \ $(NODE_DEVICE_DRIVER_SOURCES) \ $(NODE_DEVICE_DRIVER_HAL_SOURCES) \ $(NODE_DEVICE_DRIVER_UDEV_SOURCES) \ diff --git a/src/conf/storage_conf.c b/src/conf/storage_conf.c index 002663f..ce7c999 100644 --- a/src/conf/storage_conf.c +++ b/src/conf/storage_conf.c @@ -55,7 +55,8 @@ VIR_ENUM_IMPL(virStoragePool, VIR_STORAGE_POOL_LAST, "dir", "fs", "netfs", "logical", "disk", "iscsi", - "scsi", "mpath", "rbd", "sheepdog") + "scsi", "mpath", "rbd", "sheepdog", + "btrfs") VIR_ENUM_IMPL(virStoragePoolFormatFileSystem, VIR_STORAGE_POOL_FS_LAST, @@ -261,6 +262,11 @@ static virStoragePoolTypeInfo poolTypeInfo[] = { .formatFromString = virStorageVolFormatDiskTypeFromString, .formatToString = virStorageVolFormatDiskTypeToString, }, + }, + {.poolType = VIR_STORAGE_POOL_BTRFS, + .volOptions = { + .formatToString = virStoragePoolFormatDiskTypeToString, + } } }; @@ -2189,7 +2195,9 @@ virStoragePoolMatch(virStoragePoolObjPtr poolobj, (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_RBD) && (poolobj->def->type == VIR_STORAGE_POOL_RBD)) || (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG) && - (poolobj->def->type == VIR_STORAGE_POOL_SHEEPDOG)))) + (poolobj->def->type == VIR_STORAGE_POOL_SHEEPDOG)) || + (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_BTRFS) && + (poolobj->def->type == VIR_STORAGE_POOL_BTRFS)))) return false; } diff --git a/src/conf/storage_conf.h b/src/conf/storage_conf.h index 62ff1fd..3d02c2a 100644 --- a/src/conf/storage_conf.h +++ b/src/conf/storage_conf.h @@ -128,6 +128,7 @@ enum virStoragePoolType { VIR_STORAGE_POOL_MPATH, /* Multipath devices */ VIR_STORAGE_POOL_RBD, /* RADOS Block Device */ VIR_STORAGE_POOL_SHEEPDOG, /* Sheepdog device */ + VIR_STORAGE_POOL_BTRFS, /* btrfs subvolumes / snapshots */ VIR_STORAGE_POOL_LAST, }; diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c index 4ebe11b..1518dec 100644 --- a/src/storage/storage_backend.c +++ b/src/storage/storage_backend.c @@ -80,6 +80,9 @@ #if WITH_STORAGE_SHEEPDOG # include "storage_backend_sheepdog.h" #endif +#if WITH_STORAGE_BTRFS +# include "storage_backend_btrfs.h" +#endif #define VIR_FROM_THIS VIR_FROM_STORAGE @@ -112,6 +115,9 @@ static virStorageBackendPtr backends[] = { #if WITH_STORAGE_SHEEPDOG &virStorageBackendSheepdog, #endif +#if WITH_STORAGE_BTRFS + &virStorageBackendBtrfs, +#endif NULL }; diff --git a/src/storage/storage_backend_btrfs.c b/src/storage/storage_backend_btrfs.c new file mode 100644 index 0000000..f0b7563 --- /dev/null +++ b/src/storage/storage_backend_btrfs.c @@ -0,0 +1,284 @@ +/* + * storage_backend_btrfs.c: btrfs subvolume / snapshot backed storage + * + * Copyright (C) 2007-2012 Red Hat, Inc. + * Copyright (C) 2013 Oskari Saarenmaa + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <http://www.gnu.org/licenses/>. + * + * Author: Oskari Saarenmaa <os(a)ohmu.fi> + */ + +#include <config.h> + +#include <sys/statvfs.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <unistd.h> + +#include "storage_backend.h" +#include "viralloc.h" +#include "virfile.h" +#include "virstring.h" + +#define VIR_FROM_THIS VIR_FROM_STORAGE + +static char * +btrfsPoolVolPath(virStoragePoolObjPtr pool, + const char *name) +{ + char *res = NULL; + int rc = -1; + if (STREQLEN(name, pool->def->target.path, + strlen(pool->def->target.path))) { + rc = VIR_STRDUP(res, name); + } else { + rc = virAsprintf(&res, "%s/%s", pool->def->target.path, name); + } + return (rc < 0) ? NULL : res; +} + +static int +btrfsPoolCheck(virConnectPtr conn ATTRIBUTE_UNUSED, + virStoragePoolObjPtr pool, + bool *isActive) +{ + *isActive = (access(pool->def->target.path, R_OK | X_OK) == 0); + return 0; +} + +struct btrfsVolS { + int count; + struct { + char *name; + char *uuid; + } *vols; +}; + +static int +btrfsPoolFindVols(virStoragePoolObjPtr pool, + char **const groups, + void *data) +{ + struct btrfsVolS *bvols = data; + virStorageVolDefPtr vol = NULL; + int idx, ret = -1; + + if (VIR_ALLOC(vol) < 0) + goto cleanup; + + if (VIR_STRDUP(vol->name, groups[2]) < 0) + goto cleanup; + + vol->type = VIR_STORAGE_VOL_DIR; + if (virAsprintf(&vol->target.path, "%s/%s", + pool->def->target.path, + vol->name) == -1) + goto cleanup; + + if (VIR_STRDUP(vol->key, vol->target.path) < 0) + goto cleanup; + + /* Store uuid and name in case a snapshot targets this volume */ + if (VIR_REALLOC_N(bvols->vols, bvols->count+1) < 0) + goto cleanup; + idx = bvols->count++; + bvols->vols[idx].name = NULL; + bvols->vols[idx].uuid = NULL; + if (VIR_STRDUP(bvols->vols[idx].name, groups[2]) < 0 || + VIR_STRDUP(bvols->vols[idx].uuid, groups[1]) < 0) + goto cleanup; + + /* Is this a snapshot? */ + if (STRNEQ(groups[0], "-")) { + for (idx = 0; idx < bvols->count; idx++) { + if (STREQ(bvols->vols[idx].uuid, groups[0])) { + vol->backingStore.path = btrfsPoolVolPath(pool, bvols->vols[idx].name); + if (vol->backingStore.path == NULL) + goto cleanup; + break; + } + } + } + + if (VIR_REALLOC_N(pool->volumes.objs, + pool->volumes.count+1) < 0) + goto cleanup; + + pool->volumes.objs[pool->volumes.count++] = vol; + vol = NULL; + ret = 0; + +cleanup: + virStorageVolDefFree(vol); + return ret; +} + +static int +btrfsPoolRefresh(virConnectPtr conn ATTRIBUTE_UNUSED, + virStoragePoolObjPtr pool) +{ + struct statvfs sb; + struct btrfsVolS bvols; + int idx, vars[] = {3}; + const char *regexes[] = { + "^ID [0-9]+ gen [0-9]+ top level [0-9]+ " + "parent_uuid ([-a-f0-9]+) uuid ([-a-f0-9]+) path (\\S+)$"}; + virCommandPtr cmd = virCommandNewArgList( + "btrfs", "subvolume", "list", "-uq", pool->def->target.path, NULL); + + bvols.count = 0; + bvols.vols = NULL; + if (virStorageBackendRunProgRegex(pool, cmd, 1, regexes, vars, + btrfsPoolFindVols, &bvols, NULL) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("failed to parse btrfs subvolume list")); + goto cleanup; + } + + if (statvfs(pool->def->target.path, &sb) < 0) { + virReportSystemError(errno, + _("cannot statvfs path '%s'"), + pool->def->target.path); + goto cleanup; + } + pool->def->capacity = ((unsigned long long)sb.f_frsize * + (unsigned long long)sb.f_blocks); + pool->def->available = ((unsigned long long)sb.f_bfree * + (unsigned long long)sb.f_frsize); + pool->def->allocation = pool->def->capacity - pool->def->available; + + return 0; + +cleanup: + virStoragePoolObjClearVols(pool); + for (idx = 0; idx < bvols.count; idx++) { + VIR_FREE(bvols.vols[idx].name); + VIR_FREE(bvols.vols[idx].uuid); + } + VIR_FREE(bvols.vols); + + return -1; +} + +static int +btrfsPoolVolCreate(virConnectPtr conn ATTRIBUTE_UNUSED, + virStoragePoolObjPtr pool, + virStorageVolDefPtr vol) +{ + vol->type = VIR_STORAGE_VOL_DIR; + + VIR_FREE(vol->target.path); + vol->target.path = btrfsPoolVolPath(pool, vol->name); + if (vol->target.path == NULL) + return -1; + + if (virFileExists(vol->target.path)) { + virReportError(VIR_ERR_OPERATION_INVALID, + _("volume target path '%s' already exists"), + vol->target.path); + return -1; + } + + VIR_FREE(vol->key); + return VIR_STRDUP(vol->key, vol->target.path); +} + +static int +btrfsPoolVolBuild(virConnectPtr conn ATTRIBUTE_UNUSED, + virStoragePoolObjPtr pool, + virStorageVolDefPtr vol, + unsigned int flags ATTRIBUTE_UNUSED) +{ + int ret = -1; + char *target_volume = NULL, *snapshot_source = NULL; + virCommandPtr cmd = virCommandNew("btrfs"); + struct stat st; + + if (!cmd) + goto cleanup; + + target_volume = btrfsPoolVolPath(pool, vol->target.path); + if (target_volume == NULL) + goto cleanup; + + if (vol->backingStore.path == NULL) { + virCommandAddArgList(cmd, "subvolume", "create", target_volume, NULL); + } else { + int accessRetCode = -1; + snapshot_source = btrfsPoolVolPath(pool, vol->backingStore.path); + if (snapshot_source == NULL) + goto cleanup; + + accessRetCode = access(snapshot_source, R_OK | X_OK); + if (accessRetCode != 0) { + virReportSystemError(errno, + _("inaccessible backing store volume %s"), + vol->backingStore.path); + goto cleanup; + } + + virCommandAddArgList(cmd, "subvolume", "snapshot", snapshot_source, + target_volume, NULL); + } + + if (virCommandRun(cmd, NULL) < 0) + goto cleanup; + if (stat(target_volume, &st) < 0) { + virReportSystemError(errno, + _("failed to create %s"), vol->target.path); + goto cleanup; + } + ret = 0; + +cleanup: + VIR_FREE(target_volume); + VIR_FREE(snapshot_source); + virCommandFree(cmd); + return ret; +} + +static int +btrfsPoolVolDelete(virConnectPtr conn ATTRIBUTE_UNUSED, + virStoragePoolObjPtr pool, + virStorageVolDefPtr vol, + unsigned int flags ATTRIBUTE_UNUSED) +{ + int ret = -1; + char *target_volume = btrfsPoolVolPath(pool, vol->target.path); + virCommandPtr cmd = virCommandNewArgList("btrfs", "subvolume", + "delete", target_volume, NULL); + if (target_volume == NULL || cmd == NULL) + goto cleanup; + if (virCommandRun(cmd, NULL) < 0) + goto cleanup; + ret = 0; + +cleanup: + VIR_FREE(target_volume); + virCommandFree(cmd); + return ret; +} + +virStorageBackend virStorageBackendBtrfs = { + .type = VIR_STORAGE_POOL_BTRFS, + + .checkPool = btrfsPoolCheck, + .refreshPool = btrfsPoolRefresh, + + .buildVol = btrfsPoolVolBuild, + .createVol = btrfsPoolVolCreate, + .deleteVol = btrfsPoolVolDelete, +}; diff --git a/src/storage/storage_backend_btrfs.h b/src/storage/storage_backend_btrfs.h new file mode 100644 index 0000000..7d65f58 --- /dev/null +++ b/src/storage/storage_backend_btrfs.h @@ -0,0 +1,30 @@ +/* + * storage_backend_btrfs.c: btrfs subvolume / snapshot backed storage + * + * Copyright (C) 2013 Oskari Saarenmaa + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <http://www.gnu.org/licenses/>. + * + * Author: Oskari Saarenmaa <os(a)ohmu.fi> + */ + +#ifndef __VIR_STORAGE_BACKEND_BTRFS_H__ +# define __VIR_STORAGE_BACKEND_BTRFS_H__ + +# include "storage_backend.h" + +extern virStorageBackend virStorageBackendBtrfs; + +#endif /* __VIR_STORAGE_BACKEND_BTRFS_H__ */ diff --git a/tests/storagepoolxml2xmlin/pool-btrfs.xml b/tests/storagepoolxml2xmlin/pool-btrfs.xml new file mode 100644 index 0000000..c9e0626 --- /dev/null +++ b/tests/storagepoolxml2xmlin/pool-btrfs.xml @@ -0,0 +1,7 @@ +<pool type='btrfs'> + <name>lxc</name> + <uuid>96a73758-5481-4e79-b557-e130b81adf4c</uuid> + <target> + <path>/lxc</path> + </target> +</pool> diff --git a/tests/storagepoolxml2xmlout/pool-btrfs.xml b/tests/storagepoolxml2xmlout/pool-btrfs.xml new file mode 100644 index 0000000..c2cdec9 --- /dev/null +++ b/tests/storagepoolxml2xmlout/pool-btrfs.xml @@ -0,0 +1,17 @@ +<pool type='btrfs'> + <name>lxc</name> + <uuid>96a73758-5481-4e79-b557-e130b81adf4c</uuid> + <capacity unit='bytes'>0</capacity> + <allocation unit='bytes'>0</allocation> + <available unit='bytes'>0</available> + <source> + </source> + <target> + <path>/lxc</path> + <permissions> + <mode>0755</mode> + <owner>-1</owner> + <group>-1</group> + </permissions> + </target> +</pool> diff --git a/tests/storagepoolxml2xmltest.c b/tests/storagepoolxml2xmltest.c index d59cff9..cf61d24 100644 --- a/tests/storagepoolxml2xmltest.c +++ b/tests/storagepoolxml2xmltest.c @@ -100,6 +100,7 @@ mymain(void) DO_TEST("pool-iscsi-multiiqn"); DO_TEST("pool-iscsi-vendor-product"); DO_TEST("pool-sheepdog"); + DO_TEST("pool-btrfs"); return ret==0 ? EXIT_SUCCESS : EXIT_FAILURE; } diff --git a/tests/storagevolxml2xmlin/vol-btrfs-snapshot.xml b/tests/storagevolxml2xmlin/vol-btrfs-snapshot.xml new file mode 100644 index 0000000..f412e44 --- /dev/null +++ b/tests/storagevolxml2xmlin/vol-btrfs-snapshot.xml @@ -0,0 +1,11 @@ +<volume> + <name>clone</name> + <capacity unit="bytes">0</capacity> + <allocation unit="bytes">0</allocation> + <target> + <path>/lxc/clone</path> + </target> + <backingStore> + <path>/lxc/vanilla</path> + </backingStore> +</volume> diff --git a/tests/storagevolxml2xmlin/vol-btrfs.xml b/tests/storagevolxml2xmlin/vol-btrfs.xml new file mode 100644 index 0000000..9522029 --- /dev/null +++ b/tests/storagevolxml2xmlin/vol-btrfs.xml @@ -0,0 +1,8 @@ +<volume> + <name>vanilla</name> + <capacity unit="bytes">0</capacity> + <allocation unit="bytes">0</allocation> + <target> + <path>/lxc/vanilla</path> + </target> +</volume> diff --git a/tests/storagevolxml2xmlout/vol-btrfs-snapshot.xml b/tests/storagevolxml2xmlout/vol-btrfs-snapshot.xml new file mode 100644 index 0000000..b96b5f0 --- /dev/null +++ b/tests/storagevolxml2xmlout/vol-btrfs-snapshot.xml @@ -0,0 +1,26 @@ +<volume> + <name>clone</name> + <key>(null)</key> + <source> + </source> + <capacity unit='bytes'>0</capacity> + <allocation unit='bytes'>0</allocation> + <target> + <path>/lxc/clone</path> + <format type='unknown'/> + <permissions> + <mode>0600</mode> + <owner>4294967295</owner> + <group>4294967295</group> + </permissions> + </target> + <backingStore> + <path>/lxc/vanilla</path> + <format type='unknown'/> + <permissions> + <mode>0600</mode> + <owner>4294967295</owner> + <group>4294967295</group> + </permissions> + </backingStore> +</volume> diff --git a/tests/storagevolxml2xmlout/vol-btrfs.xml b/tests/storagevolxml2xmlout/vol-btrfs.xml new file mode 100644 index 0000000..bef5a1a --- /dev/null +++ b/tests/storagevolxml2xmlout/vol-btrfs.xml @@ -0,0 +1,17 @@ +<volume> + <name>vanilla</name> + <key>(null)</key> + <source> + </source> + <capacity unit='bytes'>0</capacity> + <allocation unit='bytes'>0</allocation> + <target> + <path>/lxc/vanilla</path> + <format type='unknown'/> + <permissions> + <mode>0600</mode> + <owner>4294967295</owner> + <group>4294967295</group> + </permissions> + </target> +</volume> diff --git a/tests/storagevolxml2xmltest.c b/tests/storagevolxml2xmltest.c index 5b0a60b..fdfcc55 100644 --- a/tests/storagevolxml2xmltest.c +++ b/tests/storagevolxml2xmltest.c @@ -120,6 +120,8 @@ mymain(void) DO_TEST("pool-logical", "vol-logical"); DO_TEST("pool-logical", "vol-logical-backing"); DO_TEST("pool-sheepdog", "vol-sheepdog"); + DO_TEST("pool-btrfs", "vol-btrfs"); + DO_TEST("pool-btrfs", "vol-btrfs-snapshot"); return ret==0 ? EXIT_SUCCESS : EXIT_FAILURE; } -- 1.8.3.1

2 1

[libvirt] [PATCH 1/n] spec: fix rpm build when lxc disabled
by Eric Blake 05 Sep '13

05 Sep '13

'make rpm' failed if ~/.rpmmacros contains '%_without_lxc 1', which simulates the case of not having lxc available. RPM build errors: File not found: /home/eblake/rpmbuild/BUILDROOT/libvirt-1.1.1-1.fc19.x86_64/etc/libvirt/virt-login-shell.conf File not found by glob: /home/eblake/rpmbuild/BUILDROOT/libvirt-1.1.1-1.fc19.x86_64/usr/share/man/man1/virt-login-shell.1* File not found: /home/eblake/rpmbuild/BUILDROOT/libvirt-1.1.1-1.fc19.x86_64/usr/bin/virt-login-shell make: *** [rpm] Error 1 Reported by Dan Berrange. * libvirt.spec.in: Mark virt-login-shell as conditional on lxc. Signed-off-by: Eric Blake <eblake(a)redhat.com> --- I'm working on a couple more that I spotted while in the area: we still unconditionally build vbox even though we recently moved it into libvirtd for licensing reasons, which means a client_only build will probably fall over on that; but while testing my hypothesis, I discoverd that a client_only build fails even earlier with: TEST: fdstreamtest 1) Stream read blocking ... OK 2) Stream read non-blocking ... Unexpected EOF block 0 want 128 FAILED 3) Stream write blocking ... OK 4) Stream write non-blocking ... Failed to finish stream: internal error: libvirt: error : cannot execute binary /home/eblake/rpmbuild/BUILD/libvirt-1.1.1/tests/../src/libvirt_iohelper: No such file or directory libvirt.spec.in | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/libvirt.spec.in b/libvirt.spec.in index e94901a..affd2ec 100644 --- a/libvirt.spec.in +++ b/libvirt.spec.in @@ -2014,17 +2014,23 @@ fi %doc AUTHORS ChangeLog.gz NEWS README COPYING COPYING.LESSER TODO %config(noreplace) %{_sysconfdir}/libvirt/libvirt.conf +%if %{with_lxc} %config(noreplace) %{_sysconfdir}/libvirt/virt-login-shell.conf +%endif %{_mandir}/man1/virsh.1* %{_mandir}/man1/virt-xml-validate.1* %{_mandir}/man1/virt-pki-validate.1* %{_mandir}/man1/virt-host-validate.1* +%if %{with_lxc} %{_mandir}/man1/virt-login-shell.1* +%endif %{_bindir}/virsh %{_bindir}/virt-xml-validate %{_bindir}/virt-pki-validate %{_bindir}/virt-host-validate +%if %{with_lxc} %attr(4755, root, root) %{_bindir}/virt-login-shell +%endif %{_libdir}/lib*.so.* %if %{with_dtrace} -- 1.8.3.1

2 18

[libvirt] [PATCH] libxl: Check for regcomp failure
by Jim Fehlig 05 Sep '13

05 Sep '13

Change libxlGetAutoballoonConf() function to return an int for success/failure, and fail if regcomp fails. Signed-off-by: Jim Fehlig <jfehlig(a)suse.com> --- src/libxl/libxl_conf.c | 30 +++++++++++++++++++----------- 1 file changed, 19 insertions(+), 11 deletions(-) diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c index fcb278b..a634476 100644 --- a/src/libxl/libxl_conf.c +++ b/src/libxl/libxl_conf.c @@ -1014,21 +1014,28 @@ error: return -1; } -static bool -libxlGetAutoballoonConf(libxlDriverConfigPtr cfg) +static int +libxlGetAutoballoonConf(libxlDriverConfigPtr cfg, bool *autoballoon) { regex_t regex; - int ret; + int res; + + if ((res = regcomp(&regex, + "(^| )dom0_mem=((|min:|max:)[0-9]+[bBkKmMgG]?,?)+($| )", + REG_NOSUB | REG_EXTENDED)) != 0) { + char error[100]; + regerror(res, &regex, error, sizeof(error)); + virReportError(VIR_ERR_INTERNAL_ERROR, + _("Failed to compile regex %s"), + error); - ret = regcomp(&regex, - "(^| )dom0_mem=((|min:|max:)[0-9]+[bBkKmMgG]?,?)+($| )", - REG_NOSUB | REG_EXTENDED); - if (ret) - return true; + return -1; + } - ret = regexec(&regex, cfg->verInfo->commandline, 0, NULL, 0); + res = regexec(&regex, cfg->verInfo->commandline, 0, NULL, 0); regfree(&regex); - return ret == REG_NOMATCH; + *autoballoon = res == REG_NOMATCH; + return 0; } libxlDriverConfigPtr @@ -1098,7 +1105,8 @@ libxlDriverConfigNew(void) } /* setup autoballoon */ - cfg->autoballoon = libxlGetAutoballoonConf(cfg); + if (libxlGetAutoballoonConf(cfg, &cfg->autoballoon) < 0) + goto error; return cfg; -- 1.8.1.4

3 8