June 2016 - Devel - libvirt List Archives

[libvirt] [PATCH] qemu: driver: Unset log file watcher after restoring a VM save file
by Peter Krempa 08 Jun '16

08 Jun '16

qemuProcessStart does not unset the infrastructure that retrieves errors from the qemu log file in case of migration. As this wasn't handled properly in qemuDomainSaveImageStartVM we kept the logging context/fd open for the lifetime of the VM rather than closing it after it's not needed. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1325080 --- src/qemu/qemu_driver.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 10d3e3d..4f09630 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -6509,6 +6509,11 @@ qemuDomainSaveImageStartVM(virConnectPtr conn, if (!restored) goto cleanup; + /* qemuProcessStart doesn't unsed the qemu error reporting infrastructure + * in case of migration (which is used in this case) so we need to reset it + * so that the handle to virtlogd is not held open unnecessarily */ + qemuMonitorSetDomainLog(qemuDomainGetMonitor(vm), NULL, NULL, NULL); + event = virDomainEventLifecycleNewFromObj(vm, VIR_DOMAIN_EVENT_STARTED, VIR_DOMAIN_EVENT_STARTED_RESTORED); -- 2.8.3

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[libvirt] [PATCH] xen: Also add sub-type for driver=tap2 in xen-xm
by Philipp Hahn 08 Jun '16

08 Jun '16

tap2 only handles 'aio', but not 'raw', which must be explicitly given: | $ virsh domxml-to-native yyy.xml > yyy.xm | $ xm new yyy.xm | Error: tap:/srv/xen/xxx.img not a valid disk type | $ sed -i -e 's/tap2:/&aio:/' yyy.xm | $ xm new yyy.xm Fix reading and writing "xen-xm" format for "tap2" by handling it the same as "tap". --- src/xenconfig/xen_xm.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/src/xenconfig/xen_xm.c b/src/xenconfig/xen_xm.c index e09d97e..6556886 100644 --- a/src/xenconfig/xen_xm.c +++ b/src/xenconfig/xen_xm.c @@ -196,7 +196,8 @@ xenParseXMDisk(virConfPtr conf, virDomainDefPtr def) } /* And the sub-type for tap:XXX: type */ - if (STREQ_NULLABLE(virDomainDiskGetDriver(disk), "tap")) { + if (STREQ_NULLABLE(virDomainDiskGetDriver(disk), "tap") || + STREQ_NULLABLE(virDomainDiskGetDriver(disk), "tap2")) { char *driverType; if (!(tmp = strchr(src, ':'))) @@ -298,7 +299,7 @@ xenFormatXMDisk(virConfValuePtr list, else type = virStorageFileFormatTypeToString(format); virBufferAsprintf(&buf, "%s:", driver); - if (STREQ(driver, "tap")) + if (STREQ(driver, "tap") || STREQ(driver, "tap2")) virBufferAsprintf(&buf, "%s:", type); } else { switch (virDomainDiskGetType(disk)) { -- 2.1.4

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Re: [libvirt] Channel paths
by Sascha Silbe 08 Jun '16

08 Jun '16

Dear Daniel, [CC += libvir-list, didn't notice before this thread is on qemu-devel only] "Daniel P. Berrange" <berrange(a)redhat.com> writes: > On Thu, Jun 02, 2016 at 09:27:45PM +0200, Sascha Silbe wrote: >> Since 71408079 [qemu: Don't bother user with libvirt-internal paths], >> the path chosen by libvirt isn't included in the domain XML anymore. So >> now I need to choose the path inside the application. The only safe way >> to do that is by using something in an application-managed namespace >> (e.g. /var/lib/myapp/foo or /tmp/myapp/foo); I certainly wouldn't want >> to second guess what paths would be safe inside the libvirt namespace >> (/var/lib/libvirt/qemu). Except now I hear that anything outside >> /var/lib/libvirt/qemu is not guaranteed to work due to e.g. the SELinux >> policy configured by libvirt... > > IIUC that change 71408079 ought to only apply to the persistent XML > configuration on disk. When the guest is running the live XML ought > to still report the path libvirt chose, so you should still be able > to see it while running. If that isn't the case then please raise a > bug, because we certainly expect apps to be able to discover the > path libvirt picked for exactly the reason you describe OK, this makes a lot more sense now (persistent vs. live). Just tried it with current libvirt master and it works, thanks. It even worked with 71408079 itself. I'm pretty sure things were broken some time in between, but a few quick probes didn't turn up a faulty version and I'm not curious enough to do a linear search. Cannot completely rule out other effects having played a role, either. Sascha -- Softwareentwicklung Sascha Silbe, Niederhofenstraße 5/1, 71229 Leonberg https://se-silbe.de/ USt-IdNr. DE281696641

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[libvirt] [PATCH v3 0/4] Replace VIR_ERROR with standard vir*Error in state driver init
by Jovanka Gulicoska 08 Jun '16

08 Jun '16

Replace VIR_ERROR logging macros for error reporting in driver startup routines with vir*Error function. Don't use virStrerror and remove ebuf. Link to task: http://wiki.libvirt.org/page/BiteSizedTasks#Replace_VIR_ERROR_with_standard… Jovanka Gulicoska (4): uml: Replace VIR_ERROR with standard vir*Error in state driver init qemu: Replace VIR_ERROR with standard vir*Error in state driver init xen: Replace VIR_ERROR with standard vir*Error in state driver init node_device: Replace VIR_ERROR with standard vir*Error in state driver init src/node_device/node_device_hal.c | 26 +++++++++++------- src/node_device/node_device_udev.c | 49 ++++++++++++++++++++-------------- src/qemu/qemu_driver.c | 54 +++++++++++++++++++++++--------------- src/uml/uml_driver.c | 20 ++++++-------- src/xen/xen_driver.c | 5 ++-- 5 files changed, 90 insertions(+), 64 deletions(-) -- 2.5.5

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[libvirt] [PATCH] Updated to deal with specifying user IDs to that do not map to usernames
by Roy Keene 08 Jun '16

08 Jun '16

Patch to libvirt master to avoid failing when a user ID is specified, e.g. for <seclabel type='dac'>, that does not map to a user name. This is useful if you want to run each VM as a separate user and not bother creating an /etc/passwd entry for each UID. It compiles but is as yet untested. --- src/util/virutil.c | 69 +++++++++++++++++++++++++++++++++++++++--------------- 1 file changed, 50 insertions(+), 19 deletions(-) diff --git a/src/util/virutil.c b/src/util/virutil.c index d80d994..ae95237 100644 --- a/src/util/virutil.c +++ b/src/util/virutil.c @@ -790,26 +790,57 @@ virGetUserEnt(uid_t uid, char **name, gid_t *group, char **dir) if (VIR_RESIZE_N(strbuf, strbuflen, strbuflen, strbuflen) < 0) goto cleanup; } - if (rc != 0) { - virReportSystemError(rc, - _("Failed to find user record for uid '%u'"), - (unsigned int) uid); - goto cleanup; - } else if (pw == NULL) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("Failed to find user record for uid '%u'"), - (unsigned int) uid); - goto cleanup; - } - if (name && VIR_STRDUP(*name, pw->pw_name) < 0) - goto cleanup; - if (group) - *group = pw->pw_gid; - if (dir && VIR_STRDUP(*dir, pw->pw_dir) < 0) { - if (name) - VIR_FREE(*name); - goto cleanup; + if (rc != 0 || pw == NULL) { + /* + * If the user does not exist or its data is not present, return + * a created username. + */ + VIR_FREE(strbuf); + + strbuflen = 128; + + if (VIR_ALLOC_N(strbuf, strbuflen) < 0) { + return(-1); + } + + /* + * Fake user home directory: / + */ + if (dir) { + if (VIR_STRDUP(*dir, "/") < 0) { + goto cleanup; + } + } + + /* + * Fake user GID: Same as UID + */ + if (group) { + *group = (gid_t) uid; + } + + /* + * Fake user name: Same as UID (in string) + */ + snprintf(strbuf, strbuflen, "%llu", (unsigned long long) uid); + + if (name && VIR_STRDUP(*name, strbuf) < 0) { + if (dir) { + VIR_FREE(*dir); + } + goto cleanup; + } + } else { + if (name && VIR_STRDUP(*name, pw->pw_name) < 0) + goto cleanup; + if (group) + *group = pw->pw_gid; + if (dir && VIR_STRDUP(*dir, pw->pw_dir) < 0) { + if (name) + VIR_FREE(*name); + goto cleanup; + } } ret = 0; -- 2.7.4

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[libvirt] [PATCH 0/5] qemu: Improve VM file logging using virtlogd
by Peter Krempa 08 Jun '16

08 Jun '16

Patch 4/5 fixes a bug that was introduced with virtlogd. Rest of the patches add infrastructure for logging singular events to the vm log file. Peter Krempa (5): log: handler: Add new API to append to logging files log: daemon: Add remote protocol handling for the log appending API qemu: domain: Implement helper for one-shot log entries to the VM log file qemu: process: Append the "shutting down" message using the new APIs qemu: migration: Add VM log entry on start of migration src/libvirt_private.syms | 1 + src/logging/log_daemon_dispatch.c | 26 ++++++++++++++++ src/logging/log_handler.c | 50 +++++++++++++++++++++++++++++++ src/logging/log_handler.h | 8 +++++ src/logging/log_manager.c | 34 +++++++++++++++++++++ src/logging/log_manager.h | 8 +++++ src/logging/log_protocol.x | 20 ++++++++++++- src/qemu/qemu_domain.c | 62 +++++++++++++++++++++++++++++++++++++++ src/qemu/qemu_domain.h | 5 ++++ src/qemu/qemu_migration.c | 7 +++++ src/qemu/qemu_process.c | 11 ++----- 11 files changed, 223 insertions(+), 9 deletions(-) -- 2.8.3

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[libvirt] [PATCH 0/3] Speed up schema testing
by Ján Tomko 08 Jun '16

08 Jun '16

Currently, we spawn a new xmllint process for every tested XML file. Fortunately, xmllint accepts multiple files on its command line. Use xargs on XML files we expect to be valid and only fall back to file-by-file check if that fails (or if VIR_TEST_EXPENSIVE was requested). This speeds up successfully passing domainschematest 32x (from ~13s to ~0.5s) and make check over 2x (over 16s to ~8s), making it even more fun to use with git rebase -x. Ján Tomko (3): schematestutils: split out file-by-file schema checking schematestutils: split out check_one_file schematestutils: Add check_schema_quick tests/schematestutils.sh | 79 ++++++++++++++++++++++++++++++++++++------------ 1 file changed, 59 insertions(+), 20 deletions(-) -- 2.7.3

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[libvirt] [PATCH] util: Perform proper virRandomBytes return value checking
by John Ferlan 07 Jun '16

07 Jun '16

Document the return value of virRandomBytes as 0 or some errno value and then make sure all callers make the proper checks. Signed-off-by: John Ferlan <jferlan(a)redhat.com> --- src/util/vircrypto.c | 2 +- src/util/virrandom.c | 2 ++ tests/vircryptotest.c | 6 ++++-- tests/virrandomtest.c | 2 +- 4 files changed, 8 insertions(+), 4 deletions(-) diff --git a/src/util/vircrypto.c b/src/util/vircrypto.c index 4f288f0..8452936 100644 --- a/src/util/vircrypto.c +++ b/src/util/vircrypto.c @@ -301,7 +301,7 @@ virCryptoGenerateRandom(size_t nbytes) /* If we don't have gnutls_rnd(), we will generate a less cryptographically * strong master buf from /dev/urandom. */ - if ((ret = virRandomBytes(buf, nbytes)) < 0) { + if ((ret = virRandomBytes(buf, nbytes))) { virReportSystemError(ret, "%s", _("failed to generate byte stream")); VIR_FREE(buf); return NULL; diff --git a/src/util/virrandom.c b/src/util/virrandom.c index 62a0e31..41daa40 100644 --- a/src/util/virrandom.c +++ b/src/util/virrandom.c @@ -167,6 +167,8 @@ uint32_t virRandomInt(uint32_t max) * * Generate a stream of random bytes from /dev/urandom * into @buf of size @buflen + * + * Returns 0 on success or an errno on failure */ int virRandomBytes(unsigned char *buf, diff --git a/tests/vircryptotest.c b/tests/vircryptotest.c index 72265d9..e7b7de5 100644 --- a/tests/vircryptotest.c +++ b/tests/vircryptotest.c @@ -87,9 +87,11 @@ testCryptoEncrypt(const void *opaque) VIR_ALLOC_N(iv, ivlen) < 0) goto cleanup; - if (virRandomBytes(enckey, enckeylen) < 0 || - virRandomBytes(iv, ivlen) < 0) + if (virRandomBytes(enckey, enckeylen) || + virRandomBytes(iv, ivlen)) { + fprintf(stderr, "Failed to generate random bytes\n"); goto cleanup; + } if (virCryptoEncryptData(data->algorithm, enckey, enckeylen, iv, ivlen, data->input, data->inputlen, diff --git a/tests/virrandomtest.c b/tests/virrandomtest.c index 367bdc7..687ebd9 100644 --- a/tests/virrandomtest.c +++ b/tests/virrandomtest.c @@ -40,7 +40,7 @@ testRandomBytes(const void *unused ATTRIBUTE_UNUSED) if (VIR_ALLOC_N(data, datalen) < 0) return -1; - if (virRandomBytes(data, datalen) < 0) { + if (virRandomBytes(data, datalen)) { fprintf(stderr, "Failed to generate random bytes"); goto cleanup; } -- 2.5.5

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[libvirt] [PATCH] Reindent virNetDevSendEthtoolIoctl
by Ján Tomko 07 Jun '16

07 Jun '16

--- src/util/virnetdev.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) Pushed as trivial. diff --git a/src/util/virnetdev.c b/src/util/virnetdev.c index e6c57ac..af122f5 100644 --- a/src/util/virnetdev.c +++ b/src/util/virnetdev.c @@ -3213,15 +3213,15 @@ virNetDevSendEthtoolIoctl(int fd, struct ifreq *ifr) ret = ioctl(fd, SIOCETHTOOL, ifr); if (ret != 0) { switch (errno) { - case EINVAL: /* kernel doesn't support SIOCETHTOOL */ - VIR_DEBUG("ethtool ioctl: invalid request"); - break; - case EOPNOTSUPP: /* kernel doesn't support specific feature */ - VIR_DEBUG("ethtool ioctl: request not supported"); - break; - default: - virReportSystemError(errno, "%s", _("ethtool ioctl error")); - break; + case EINVAL: /* kernel doesn't support SIOCETHTOOL */ + VIR_DEBUG("ethtool ioctl: invalid request"); + break; + case EOPNOTSUPP: /* kernel doesn't support specific feature */ + VIR_DEBUG("ethtool ioctl: request not supported"); + break; + default: + virReportSystemError(errno, "%s", _("ethtool ioctl error")); + break; } } -- 2.7.3

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[libvirt] [PATCH] Reindent comment of virNetDevFeatureAvailable
by Ján Tomko 07 Jun '16

07 Jun '16

--- src/util/virnetdev.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) Pushed as trivial. diff --git a/src/util/virnetdev.c b/src/util/virnetdev.c index 7db4497..5ad61fe 100644 --- a/src/util/virnetdev.c +++ b/src/util/virnetdev.c @@ -3241,14 +3241,14 @@ virNetDevSendEthtoolIoctl(const char *ifname, void *cmd) /** -* virNetDevFeatureAvailable -* This function checks for the availability of a network device feature -* -* @ifname: name of the interface -* @cmd: reference to an ethtool command structure -* -* Returns 0 if not found, 1 on success, and -1 on failure. -*/ + * virNetDevFeatureAvailable + * This function checks for the availability of a network device feature + * + * @ifname: name of the interface + * @cmd: reference to an ethtool command structure + * + * Returns 0 if not found, 1 on success, and -1 on failure. + */ static int virNetDevFeatureAvailable(const char *ifname, struct ethtool_value *cmd) { -- 2.7.3

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