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[libvirt] CfP with Extended Deadline 5th Workshop on Virtualization in High-Performance Cloud Computing (VHPC'10)
by Michael Alexander 30 Mar '10

30 Mar '10

Apologies if you received multiple copies of this message. ================================================================= CALL FOR PAPERS 5th Workshop on Virtualization in High-Performance Cloud Computing VHPC'10 as part of Euro-Par 2010, Island of Ischia-Naples, Italy ================================================================= Date: August 31, 2010 Euro-Par 2009: http://www.europar2010.org/ Workshop URL: http://vhpc.org SUBMISSION DEADLINE: Abstracts: April 4, 2010 (extended) Full Paper: June 19, 2010 (extended) Scope: Virtualization has become a common abstraction layer in modern data centers, enabling resource owners to manage complex infrastructure independently of their applications. Conjointly virtualization is becoming a driving technology for a manifold of industry grade IT services. Piloted by the Amazon Elastic Computing Cloud services, the cloud concept includes the notion of a separation between resource owners and users, adding services such as hosted application frameworks and queuing. Utilizing the same infrastructure, clouds carry significant potential for use in high-performance scientific computing. The ability of clouds to provide for requests and releases of vast computing resource dynamically and close to the marginal cost of providing the services is unprecedented in the history of scientific and commercial computing. Distributed computing concepts that leverage federated resource access are popular within the grid community, but have not seen previously desired deployed levels so far. Also, many of the scientific datacenters have not adopted virtualization or cloud concepts yet. This workshop aims to bring together industrial providers with the scientific community in order to foster discussion, collaboration and mutual exchange of knowledge and experience. The workshop will be one day in length, composed of 20 min paper presentations, each followed by 10 min discussion sections. Presentations may be accompanied by interactive demonstrations. It concludes with a 30 min panel discussion by presenters. TOPICS Topics include, but are not limited to, the following subjects: - Virtualization in cloud, cluster and grid HPC environments - VM cloud, cluster load distribution algorithms - Cloud, cluster and grid filesystems - QoS and and service level guarantees - Cloud programming models, APIs and databases - Software as a service (SaaS) - Cloud provisioning - Virtualized I/O - VMMs and storage virtualization - MPI, PVM on virtual machines - High-performance network virtualization - High-speed interconnects - Hypervisor extensions - Tools for cluster and grid computing - Xen/other VMM cloud/cluster/grid tools - Raw device access from VMs - Cloud reliability, fault-tolerance, and security - Cloud load balancing - VMs - power efficiency - Network architectures for VM-based environments - VMMs/Hypervisors - Hardware support for virtualization - Fault tolerant VM environments - Workload characterizations for VM-based environments - Bottleneck management - Metering - VM-based cloud performance modeling - Cloud security, access control and data integrity - Performance management and tuning hosts and guest VMs - VMM performance tuning on various load types - Research and education use cases - Cloud use cases - Management of VM environments and clouds - Deployment of VM-based environments PAPER SUBMISSION Papers submitted to the workshop will be reviewed by at least two members of the program committee and external reviewers. Submissions should include abstract, key words, the e-mail address of the corresponding author, and must not exceed 10 pages, including tables and figures at a main font size no smaller than 11 point. Submission of a paper should be regarded as a commitment that, should the paper be accepted, at least one of the authors will register and attend the conference to present the work. Accepted papers will be published in the Springer LNCS series - the format must be according to the Springer LNCS Style. Initial submissions are in PDF, accepted papers will be requested to provided source files. Format Guidelines: http://www.springer.de/comp/lncs/authors.html Submission Link: http://edas.info/newPaper.php?c=8553 IMPORTANT DATES April 4 - Abstract submission due (extended) May 19 - Full paper submission (extended) July 14 - Acceptance notification August 3 - Camera-ready version due August 31 - September 3 - conference CHAIR Michael Alexander (chair), scaledinfra technologies GmbH, Austria Gianluigi Zanetti (co-chair), CRS4, Italy PROGRAM COMMITTEE Padmashree Apparao, Intel Corp., USA Volker Buege, University of Karlsruhe, Germany Roberto Canonico, University of Napoli Federico II, Italy Tommaso Cucinotta, Scuola Superiore Sant'Anna, Italy Werner Fischer, Thomas Krenn AG, Germany William Gardner, University of Guelph, Canada Wolfgang Gentzsch, DEISA. Max Planck Gesellschaft, Germany Derek Groen, UVA, The Netherlands Marcus Hardt, Forschungszentrum Karlsruhe, Germany Sverre Jarp, CERN, Switzerland Shantenu Jha, Louisiana State University, USA Xuxian Jiang, NC State, USA Kenji Kaneda, Google, Japan Yves Kemp, DESY Hamburg, Germany Ignacio Llorente, Universidad Complutense de Madrid, Spain Naoya Maruyama, Tokyo Institute of Technology, Japan Jean-Marc Menaud, Ecole des Mines de Nantes, France Anastassios Nano, National Technical University of Athens, Greece Oliver Oberst, Karlsruhe Institute of Technology, Germany Jose Renato Santos, HP Labs, USA Borja Sotomayor, University of Chicago, USA Yoshio Turner, HP Labs, USA Kurt Tuschku, University of Vienna, Austria Lizhe Wang, Indiana University, USA Chao-Tung Yang, Tunghai University, Taiwan DURATION: Workshop Duration is one day. GENERAL INFORMATION The workshop will be held as part of Euro-Par 2010, Island of Ischia-Naples, Italy. Euro-Par 2010: http://www.europar2010.org/

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[libvirt] ESX snapshot deletion
by Chris Lalancette 30 Mar '10

30 Mar '10

Hey Mattias, I'm currently working on the semantics of virDomainSnapshotDelete(), which has been renamed from the earlier virDomainSnapshotDeactivate(). In qemu/kvm, it seems like it is possible to delete a snapshot at any time, even while that snapshot is running (though I'm not yet sure exactly what happens in that case). Talking to Jirka, it seems like the virtualbox GUI doesn't allow you to do any operations at all on snapshots while a domain is running, although we don't know yet if this is a restriction in the API as well. My questions for you are about how ESX handles this situation: 1) Can you manipulate a domain's snapshots while that domain is running? 2) If so, can you delete the snapshot that is currently running? If so, what happens? -- Chris Lalancette

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[libvirt] [PATCH 1/2] build: update gnulib
by Eric Blake 30 Mar '10

30 Mar '10

Picks up fixes for gethostname compilation problems on mingw. * .gnulib: Update to latest. * build-aux/.gitignore: Regenerate. * cfg.mk (local-checks-to-skip): Avoid new test not relevent to libvirt. --- This replaces https://www.redhat.com/archives/libvir-list/2010-March/msg00915.html, and should fix the issues Matthias was seeing with compiling gnulib on mingw. .gnulib | 2 +- build-aux/.gitignore | 1 + cfg.mk | 1 + 3 files changed, 3 insertions(+), 1 deletions(-) diff --git a/.gnulib b/.gnulib index 10d66ae..4f01268 160000 --- a/.gnulib +++ b/.gnulib @@ -1 +1 @@ -Subproject commit 10d66aedfdd610f731c8c54152b9dfca3efbee12 +Subproject commit 4f01268d0c584c20704e42527f4fa125e7525aae diff --git a/build-aux/.gitignore b/build-aux/.gitignore index 29b1e03..8717628 100644 --- a/build-aux/.gitignore +++ b/build-aux/.gitignore @@ -6,6 +6,7 @@ /useless-if-before-free /vc-list-files arg-nonnull.h +c++defs.h config.rpath gitlog-to-changelog mkinstalldirs diff --git a/cfg.mk b/cfg.mk index 27cfca4..0c41ae5 100644 --- a/cfg.mk +++ b/cfg.mk @@ -51,6 +51,7 @@ local-checks-to-skip = \ sc_space_tab \ sc_sun_os_names \ sc_system_h_headers \ + sc_texinfo_acronym \ sc_tight_scope \ sc_two_space_separator_in_usage \ sc_error_message_uppercase \ -- 1.6.6.1

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[libvirt] [PATCH] maint: show which compiler warning triggered
by Eric Blake 30 Mar '10

30 Mar '10

* acinclude.m4 (LIBVIRT_COMPILE_WARNINGS): Add -fdiagnostics-show-option. --- Here's an example of how things change, when using './configure --enable-compiler-warnings=error' and introducing something gcc would warn about: CC libvirt_driver_nwfilter_la-nwfilter_ebiptables_driver.lo cc1: warnings being treated as errors nwfilter/nwfilter_ebiptables_driver.c: In function '_iptablesCreateRuleInstance': nwfilter/nwfilter_ebiptables_driver.c:1059: error: unused variable 'oops' [-Wunused-variable] acinclude.m4 | 10 +++++++--- 1 files changed, 7 insertions(+), 3 deletions(-) diff --git a/acinclude.m4 b/acinclude.m4 index f00933f..7fa2d67 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -13,13 +13,17 @@ AC_DEFUN([LIBVIRT_COMPILE_WARNINGS],[ dnl ****************************** AC_ARG_ENABLE(compile-warnings, - AC_HELP_STRING([--enable-compile-warnings=@<:@no/minimum/yes/maximum/error@:>@], - [Turn on compiler warnings]),, + [AC_HELP_STRING([--enable-compile-warnings=@<:@no/minimum/yes/maximum/error@:>@], + [Turn on compiler warnings])],, [enable_compile_warnings="m4_default([$1],[maximum])"]) warnCFLAGS= - common_flags="-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fasynchronous-unwind-tables" + common_flags= + common_flags="$common_flags -Wp,-D_FORTIFY_SOURCE=2" + common_flags="$common_flags -fexceptions" + common_flags="$common_flags -fasynchronous-unwind-tables" + common_flags="$common_flags -fdiagnostics-show-option" case "$enable_compile_warnings" in no) -- 1.6.6.1

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[libvirt] [PATCH] Add dummy nwfilter driver to test driver
by Stefan Berger 30 Mar '10

30 Mar '10

This patch adds a dummy nwfilter driver to the test driver so that the int-overflow test passes without modifications. Signed-off-by: Stefan Berger <Stefanb(a)us.ibm.com> Index: libvirt/src/test/test_driver.c =================================================================== --- libvirt.orig/src/test/test_driver.c +++ libvirt/src/test/test_driver.c @@ -5205,6 +5205,22 @@ static int testSecretClose(virConnectPtr return 0; } + +static virDrvOpenStatus testNWFilterOpen(virConnectPtr conn, + virConnectAuthPtr auth ATTRIBUTE_UNUSED, + int flags ATTRIBUTE_UNUSED) { + if (STRNEQ(conn->driver->name, "Test")) + return VIR_DRV_OPEN_DECLINED; + + conn->secretPrivateData = conn->privateData; + return VIR_DRV_OPEN_SUCCESS; +} + +static int testNWFilterClose(virConnectPtr conn) { + conn->nwfilterPrivateData = NULL; + return 0; +} + static virDriver testDriver = { VIR_DRV_TEST, "Test", @@ -5398,6 +5414,12 @@ static virSecretDriver testSecretDriver }; +static virNWFilterDriver testNWFilterDriver = { + .name = "Test", + .open = testNWFilterOpen, + .close = testNWFilterClose, +}; + /** * testRegister: * @@ -5418,6 +5440,8 @@ testRegister(void) return -1; if (virRegisterSecretDriver(&testSecretDriver) < 0) return -1; + if (virRegisterNWFilterDriver(&testNWFilterDriver) < 0) + return -1; return 0; }

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[libvirt] [PATCH] Use libvirt's existing ipv6/ipv4 parser/printer rather than self-written ones
by Stefan Berger 30 Mar '10

30 Mar '10

This patch changes the network filtering code to use libvirt's existing IPv4 and IPv6 address parsers/printers rather than my self-written ones. I am introducing a new function in network.c that counts the number of bits in a netmask and ensures that the given address is indeed a netmask, return -1 on error or values of 0-32 for IPv4 addresses and 0-128 for IPv6 addresses. I then based the function checking for valid netmask on invoking this function. Signed-off-by: Stefan Berger <stefanb(a)us.ibm.com> --- src/conf/nwfilter_conf.c | 181 ++---------------------------- src/conf/nwfilter_conf.h | 8 - src/nwfilter/nwfilter_ebiptables_driver.c | 46 ++++--- src/util/network.c | 173 +++++++++++++++------------- src/util/network.h | 3 5 files changed, 142 insertions(+), 269 deletions(-) Index: libvirt-acl/src/conf/nwfilter_conf.h =================================================================== --- libvirt-acl.orig/src/conf/nwfilter_conf.h +++ libvirt-acl/src/conf/nwfilter_conf.h @@ -33,6 +33,8 @@ # include "util.h" # include "hash.h" # include "xml.h" +# include "network.h" + /** * Chain suffix size is: @@ -85,11 +87,7 @@ struct _nwMACAddress { typedef struct _nwIPAddress nwIPAddress; typedef nwIPAddress *nwIPAddressPtr; struct _nwIPAddress { - int isIPv6; - union { - unsigned char ipv4Addr[4]; - unsigned char ipv6Addr[16]; - } addr; + virSocketAddr addr; }; Index: libvirt-acl/src/util/network.c =================================================================== --- libvirt-acl.orig/src/util/network.c +++ libvirt-acl/src/util/network.c @@ -219,88 +219,10 @@ virSocketGetPort(virSocketAddrPtr addr) * Returns 0 in case of success and -1 in case of error */ int virSocketAddrIsNetmask(virSocketAddrPtr netmask) { - int i; - - if (netmask == NULL) - return(-1); - - if (netmask->stor.ss_family == AF_INET) { - virIPv4Addr tm; - unsigned char tmp; - int ok = 0; - - if (getIPv4Addr(netmask, &tm) < 0) - return(-1); - - for (i = 0;i < 4;i++) { - if (tm[i] != 0) - break; - } - - if (i >= 4) - return(0); - - tmp = 0xFF; - do { - if (tm[i] == tmp) { - ok = 1; - break; - } - tmp <<= 1; - } while (tmp != 0); - if (ok == 0) - return(-1); - i++; - - if (i >= 4) - return(0); - - for (;i < 4;i++) { - if (tm[i] != 0xFF) - return(-1); - } - } else if (netmask->stor.ss_family == AF_INET6) { - virIPv6Addr tm; - unsigned short tmp; - int ok = 0; - - /* - * Hum, on IPv6 people use prefixes instead of netmask - */ - if (getIPv6Addr(netmask, &tm) < 0) - return(-1); - - for (i = 0;i < 8;i++) { - if (tm[i] != 0) - break; - } - - if (i >= 8) - return(0); - - tmp = 0xFFFF; - do { - if (tm[i] == tmp) { - ok = 1; - break; - } - tmp <<= 1; - } while (tmp != 0); - if (ok == 0) - return(-1); - i++; - - if (i >= 8) - return(0); - - for (;i < 8;i++) { - if (tm[i] != 0xFFFF) - return(-1); - } - } else { - return(-1); - } - return(0); + int n = virSocketGetNumNetmaskBits(netmask); + if (n < 0) + return -1; + return 0; } /** @@ -415,3 +337,90 @@ int virSocketGetRange(virSocketAddrPtr s } return(ret); } + + +/** + * virGetNumNetmaskBits + * @netmask: the presumed netmask + * + * Get the number of netmask bits in a netmask. + * + * Returns the number of bits in the netmask or -1 if an error occurred + * or the netmask is invalid. + */ +int virSocketGetNumNetmaskBits(const virSocketAddrPtr netmask) +{ + int i, j; + int c = 0; + + if (netmask->stor.ss_family == AF_INET) { + virIPv4Addr tm; + uint8_t bit; + + if (getIPv4Addr(netmask, &tm) < 0) + return -1; + + for (i = 0; i < 4; i++) + if (tm[i] == 0xff) + c += 8; + else + break; + + if (c == 8 * 4) + return c; + + j = i << 3; + while (j < (8 * 4)) { + bit = 1 << (7 - (j & 7)); + if ((tm[j >> 3] & bit)) { + c++; + } else + break; + j++; + } + + while (j < (8 * 4)) { + bit = 1 << (7 - (j & 7)); + if ((tm[j >> 3] & bit)) + return -1; + j++; + } + + return c; + } else if (netmask->stor.ss_family == AF_INET6) { + virIPv6Addr tm; + uint16_t bit; + + if (getIPv6Addr(netmask, &tm) < 0) + return -1; + + for (i = 0; i < 8; i++) + if (tm[i] == 0xffff) + c += 16; + else + break; + + if (c == 16 * 8) + return c; + + j = i << 4; + while (j < (16 * 8)) { + bit = 1 << (15 - (j & 0xf)); + if ((tm[j >> 4] & bit)) { + c++; + } else + break; + j++; + } + + while (j < (16 * 8)) { + bit = 1 << (15 - (j & 0xf)); + if ((tm[j >> 4]) & bit) + return -1; + j++; + } + + return c; + } + return -1; +} Index: libvirt-acl/src/util/network.h =================================================================== --- libvirt-acl.orig/src/util/network.h +++ libvirt-acl/src/util/network.h @@ -48,4 +48,7 @@ int virSocketAddrIsNetmask(virSocketAddr int virSocketCheckNetmask (virSocketAddrPtr addr1, virSocketAddrPtr addr2, virSocketAddrPtr netmask); + +int virSocketGetNumNetmaskBits(const virSocketAddrPtr netmask); + #endif /* __VIR_NETWORK_H__ */ Index: libvirt-acl/src/conf/nwfilter_conf.c =================================================================== --- libvirt-acl.orig/src/conf/nwfilter_conf.c +++ libvirt-acl/src/conf/nwfilter_conf.c @@ -473,22 +473,6 @@ checkValidMask(unsigned char *data, int } -/* check for a valid IPv4 mask */ -static bool -checkIPv4Mask(enum attrDatatype datatype ATTRIBUTE_UNUSED, void *maskptr, - virNWFilterRuleDefPtr nwf ATTRIBUTE_UNUSED) -{ - return checkValidMask(maskptr, 4); -} - -static bool -checkIPv6Mask(enum attrDatatype datatype ATTRIBUTE_UNUSED, void *maskptr, - virNWFilterRuleDefPtr nwf ATTRIBUTE_UNUSED) -{ - return checkValidMask(maskptr, 16); -} - - static bool checkMACMask(enum attrDatatype datatype ATTRIBUTE_UNUSED, void *macMask, @@ -498,16 +482,6 @@ checkMACMask(enum attrDatatype datatype } -static int getMaskNumBits(const unsigned char *mask, int len) { - int i = 0; - while (i < (len << 3)) { - if (!(mask[i>>3] & (0x80 >> (i & 3)))) - break; - i++; - } - return i; -} - /* * supported arp opcode -- see 'ebtables -h arp' for the naming */ @@ -1227,21 +1201,8 @@ static bool virNWIPv4AddressParser(const char *input, nwIPAddressPtr output) { - int i; - char *endptr; - const char *n = input; - long int d; - - for (i = 0; i < 4; i++) { - d = strtol(n, &endptr, 10); - if (d < 0 || d > 255 || - (endptr - n > 3 ) || - (i <= 2 && *endptr != '.' ) || - (i == 3 && *endptr != '\0')) - return 0; - output->addr.ipv4Addr[i] = (unsigned char)d; - n = endptr + 1; - } + if (virSocketParseIpv4Addr(input, &output->addr) == -1) + return 0; return 1; } @@ -1250,81 +1211,8 @@ static bool virNWIPv6AddressParser(const char *input, nwIPAddressPtr output) { - int i, j, pos; - uint16_t n; - int shiftpos = -1; - char prevchar; - char base; - - memset(output, 0x0, sizeof(*output)); - - output->isIPv6 = 1; - - pos = 0; - i = 0; - - while (i < 8) { - j = 0; - n = 0; - while (1) { - prevchar = input[pos++]; - if (prevchar == ':' || prevchar == 0) { - if (j > 0) { - output->addr.ipv6Addr[i * 2 + 0] = n >> 8; - output->addr.ipv6Addr[i * 2 + 1] = n; - i++; - } - break; - } - - if (j >= 4) - return 0; - - if (prevchar >= '0' && prevchar <= '9') - base = '0'; - else if (prevchar >= 'a' && prevchar <= 'f') - base = 'a' - 10; - else if (prevchar >= 'A' && prevchar <= 'F') - base = 'A' - 10; - else - return 0; - n <<= 4; - n |= (prevchar - base); - j++; - } - - if (prevchar == 0) - break; - - if (input[pos] == ':') { - pos ++; - // sequence of zeros - if (prevchar != ':') - return 0; - - if (shiftpos != -1) - return 0; - - shiftpos = i; - } - } - - if (shiftpos != -1) { - if (i >= 7) - return 0; - i--; - j = 0; - while (i >= shiftpos) { - output->addr.ipv6Addr[15 - (j*2) - 1] = - output->addr.ipv6Addr[i * 2 + 0]; - output->addr.ipv6Addr[15 - (j*2) - 0] = - output->addr.ipv6Addr[i * 2 + 1]; - output->addr.ipv6Addr[i * 2 + 0] = 0; - output->addr.ipv6Addr[i * 2 + 1] = 0; - i--; - j++; - } - } + if (virSocketParseIpv6Addr(input, &output->addr) == -1) + return 0; return 1; } @@ -1442,11 +1330,10 @@ virNWFilterRuleDetailsParse(virConnectPt } else rc = -1; } else { - if (checkIPv4Mask(datatype, - ipaddr.addr.ipv4Addr, nwf)) - *(uint8_t *)storage_ptr = - getMaskNumBits(ipaddr.addr.ipv4Addr, - sizeof(ipaddr.addr.ipv4Addr)); + int_val = virSocketGetNumNetmaskBits( + &ipaddr.addr); + if (int_val >= 0) + *(uint8_t *)storage_ptr = int_val; else rc = -1; found = 1; @@ -1497,11 +1384,10 @@ virNWFilterRuleDetailsParse(virConnectPt } else rc = -1; } else { - if (checkIPv6Mask(datatype, - ipaddr.addr.ipv6Addr, nwf)) - *(uint8_t *)storage_ptr = - getMaskNumBits(ipaddr.addr.ipv6Addr, - sizeof(ipaddr.addr.ipv6Addr)); + int_val = virSocketGetNumNetmaskBits( + &ipaddr.addr); + if (int_val >= 0) + *(uint8_t *)storage_ptr = int_val; else rc = -1; found = 1; @@ -2571,43 +2457,12 @@ virNWFilterPoolObjDeleteDef(virConnectPt static void virNWIPAddressFormat(virBufferPtr buf, nwIPAddressPtr ipaddr) { - if (!ipaddr->isIPv6) { - virBufferVSprintf(buf, "%d.%d.%d.%d", - ipaddr->addr.ipv4Addr[0], - ipaddr->addr.ipv4Addr[1], - ipaddr->addr.ipv4Addr[2], - ipaddr->addr.ipv4Addr[3]); - } else { - int i; - int dcshown = 0, in_dc = 0; - unsigned short n; - while (i < 8) { - n = (ipaddr->addr.ipv6Addr[i * 2 + 0] << 8) | - ipaddr->addr.ipv6Addr[i * 2 + 1]; - if (n == 0) { - if (!dcshown) { - in_dc = 1; - if (i == 0) - virBufferAddLit(buf, ":"); - dcshown = 1; - } - if (in_dc) { - i++; - continue; - } - } - if (in_dc) { - dcshown = 1; - virBufferAddLit(buf, ":"); - in_dc = 0; - } - i++; - virBufferVSprintf(buf, "%x", n); - if (i < 8) - virBufferAddLit(buf, ":"); - } - if (in_dc) - virBufferAddLit(buf, ":"); + virSocketAddrPtr addr = &ipaddr->addr; + char *output = virSocketFormatAddr(addr); + + if (output) { + virBufferVSprintf(buf, "%s", output); + VIR_FREE(output); } } Index: libvirt-acl/src/nwfilter/nwfilter_ebiptables_driver.c =================================================================== --- libvirt-acl.orig/src/nwfilter/nwfilter_ebiptables_driver.c +++ libvirt-acl/src/nwfilter/nwfilter_ebiptables_driver.c @@ -144,7 +144,7 @@ printDataType(virConnectPtr conn, nwItemDescPtr item) { int done; - int i, pos, s; + char *data; if (printVar(conn, vars, buf, bufsize, item, &done)) return 1; @@ -154,30 +154,38 @@ printDataType(virConnectPtr conn, switch (item->datatype) { case DATATYPE_IPADDR: - if (snprintf(buf, bufsize, "%d.%d.%d.%d", - item->u.ipaddr.addr.ipv4Addr[0], - item->u.ipaddr.addr.ipv4Addr[1], - item->u.ipaddr.addr.ipv4Addr[2], - item->u.ipaddr.addr.ipv4Addr[3]) >= bufsize) { - virNWFilterReportError(conn, VIR_ERR_INVALID_NWFILTER, - _("Buffer too small for IP address")); + data = virSocketFormatAddr(&item->u.ipaddr.addr); + if (!data) { + virNWFilterReportError(conn, VIR_ERR_INTERNAL_ERROR, + _("internal IPv4 address representation " + "is bad")); + return 1; + } + if (snprintf(buf, bufsize, "%s", data) >= bufsize) { + virNWFilterReportError(conn, VIR_ERR_INTERNAL_ERROR, + _("buffer too small for IP address")); + VIR_FREE(data); return 1; } + VIR_FREE(data); break; case DATATYPE_IPV6ADDR: - pos = 0; - for (i = 0; i < 16; i++) { - s = snprintf(&buf[pos], bufsize - pos, "%x%s", - (unsigned int)item->u.ipaddr.addr.ipv6Addr[i], - ((i & 1) && (i < 15)) ? ":" : "" ); - if (s >= bufsize - pos) { - virNWFilterReportError(conn, VIR_ERR_INVALID_NWFILTER, - _("Buffer too small for IPv6 address")); - return 1; - } - pos += s; + data = virSocketFormatAddr(&item->u.ipaddr.addr); + if (!data) { + virNWFilterReportError(conn, VIR_ERR_INTERNAL_ERROR, + _("internal IPv6 address representation " + "is bad")); + return 1; + } + + if (snprintf(buf, bufsize, "%s", data) >= bufsize) { + virNWFilterReportError(conn, VIR_ERR_INTERNAL_ERROR, + _("buffer too small for IPv6 address")); + VIR_FREE(data); + return 1; } + VIR_FREE(data); break; case DATATYPE_MACADDR:

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[libvirt] [PATCH] Remove driver dependency from nwfilter_conf.c
by Stefan Berger 30 Mar '10

30 Mar '10

This patch removes the driver dependency from nwfilter_conf.c and moves a callback function calling into the driver into nwfilter_gentech_driver.c and passes a pointer to that callback function upon initialization of nwfilter_conf.c. Signed-off-by: Stefan Berger <stefanb(a)us.ibm.com> Index: libvirt-acl/src/conf/nwfilter_conf.c =================================================================== --- libvirt-acl.orig/src/conf/nwfilter_conf.c +++ libvirt-acl/src/conf/nwfilter_conf.c @@ -39,7 +39,6 @@ #include "nwfilter_params.h" #include "nwfilter_conf.h" #include "domain_conf.h" -#include "nwfilter/nwfilter_gentech_driver.h" #define VIR_FROM_THIS VIR_FROM_NWFILTER @@ -2064,56 +2063,7 @@ virNWFilterRegisterCallbackDriver(virNWF } -enum UpdateStep { - STEP_APPLY_NEW, - STEP_TEAR_NEW, - STEP_TEAR_OLD, -}; - -struct cbStruct { - virConnectPtr conn; - enum UpdateStep step; - int err; -}; - -static void -virNWFilterDomainFWUpdateCB(void *payload, - const char *name ATTRIBUTE_UNUSED, - void *data) -{ - virDomainObjPtr obj = payload; - virDomainDefPtr vm = obj->def; - struct cbStruct *cb = data; - int i; - - virDomainObjLock(obj); - - if (virDomainObjIsActive(obj)) { - for (i = 0; i < vm->nnets; i++) { - virDomainNetDefPtr net = vm->nets[i]; - if ((net->filter) && (net->ifname)) { - switch (cb->step) { - case STEP_APPLY_NEW: - cb->err = virNWFilterUpdateInstantiateFilter(cb->conn, - net); - break; - - case STEP_TEAR_NEW: - cb->err = virNWFilterRollbackUpdateFilter(cb->conn, net); - break; - - case STEP_TEAR_OLD: - cb->err = virNWFilterTearOldFilter(cb->conn, net); - break; - } - if (cb->err) - break; - } - } - } - - virDomainObjUnlock(obj); -} +static virHashIterator virNWFilterDomainFWUpdateCB; static int @@ -2121,7 +2071,7 @@ virNWFilterTriggerVMFilterRebuild(virCon { int i; int err; - struct cbStruct cb = { + struct domUpdateCBStruct cb = { .conn = conn, .err = 0, .step = STEP_APPLY_NEW, @@ -2717,8 +2667,10 @@ char *virNWFilterConfigFile(virConnectPt } -int virNWFilterConfLayerInit(void) +int virNWFilterConfLayerInit(virHashIterator domUpdateCB) { + virNWFilterDomainFWUpdateCB = domUpdateCB; + if (virMutexInit(&updateMutex)) return 1; Index: libvirt-acl/src/conf/nwfilter_conf.h =================================================================== --- libvirt-acl.orig/src/conf/nwfilter_conf.h +++ libvirt-acl/src/conf/nwfilter_conf.h @@ -402,6 +402,19 @@ struct _virNWFilterRuleInst { }; +enum UpdateStep { + STEP_APPLY_NEW, + STEP_TEAR_NEW, + STEP_TEAR_OLD, +}; + +struct domUpdateCBStruct { + virConnectPtr conn; + enum UpdateStep step; + int err; +}; + + enum virDomainNetType; typedef int (*virNWFilterRuleCreateInstance)(virConnectPtr conn, @@ -516,7 +529,7 @@ virNWFilterDefPtr virNWFilterDefParseFil void virNWFilterPoolObjLock(virNWFilterPoolObjPtr obj); void virNWFilterPoolObjUnlock(virNWFilterPoolObjPtr obj); -int virNWFilterConfLayerInit(void); +int virNWFilterConfLayerInit(virHashIterator domUpdateCB); void virNWFilterConfLayerShutdown(void); int virNWFilterParamConfLayerInit(void); Index: libvirt-acl/src/nwfilter/nwfilter_driver.c =================================================================== --- libvirt-acl.orig/src/nwfilter/nwfilter_driver.c +++ libvirt-acl/src/nwfilter/nwfilter_driver.c @@ -34,6 +34,7 @@ #include "memory.h" #include "domain_conf.h" #include "nwfilter_driver.h" +#include "nwfilter_gentech_driver.h" #define VIR_FROM_THIS VIR_FROM_NWFILTER @@ -64,7 +65,7 @@ static int nwfilterDriverStartup(int privileged) { char *base = NULL; - if (virNWFilterConfLayerInit() < 0) + if (virNWFilterConfLayerInit(virNWFilterDomainFWUpdateCB) < 0) return -1; if (VIR_ALLOC(driverState) < 0) Index: libvirt-acl/src/nwfilter/nwfilter_gentech_driver.c =================================================================== --- libvirt-acl.orig/src/nwfilter/nwfilter_gentech_driver.c +++ libvirt-acl/src/nwfilter/nwfilter_gentech_driver.c @@ -681,3 +681,43 @@ virNWFilterTeardownFilter(const virDomai return 0; } + + +void +virNWFilterDomainFWUpdateCB(void *payload, + const char *name ATTRIBUTE_UNUSED, + void *data) +{ + virDomainObjPtr obj = payload; + virDomainDefPtr vm = obj->def; + struct domUpdateCBStruct *cb = data; + int i; + + virDomainObjLock(obj); + + if (virDomainObjIsActive(obj)) { + for (i = 0; i < vm->nnets; i++) { + virDomainNetDefPtr net = vm->nets[i]; + if ((net->filter) && (net->ifname)) { + switch (cb->step) { + case STEP_APPLY_NEW: + cb->err = virNWFilterUpdateInstantiateFilter(cb->conn, + net); + break; + + case STEP_TEAR_NEW: + cb->err = virNWFilterRollbackUpdateFilter(cb->conn, net); + break; + + case STEP_TEAR_OLD: + cb->err = virNWFilterTearOldFilter(cb->conn, net); + break; + } + if (cb->err) + break; + } + } + } + + virDomainObjUnlock(obj); +} Index: libvirt-acl/src/nwfilter/nwfilter_gentech_driver.h =================================================================== --- libvirt-acl.orig/src/nwfilter/nwfilter_gentech_driver.h +++ libvirt-acl/src/nwfilter/nwfilter_gentech_driver.h @@ -51,4 +51,8 @@ int virNWFilterTeardownFilter(const virD virNWFilterHashTablePtr virNWFilterCreateVarHashmap(virConnectPtr conn, char *macaddr); +void virNWFilterDomainFWUpdateCB(void *payload, + const char *name ATTRIBUTE_UNUSED, + void *data); + #endif

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[libvirt] [PATCH] [0/6] implement synchronous hook scripts
by Daniel Veillard 30 Mar '10

30 Mar '10

As discussed previously this implement hook scripts which may be called from libvirtd at specific times. The script are supposed to be small, execute fast as it's synchronous, their exit value is 0 otherwise it's considered a failure (which may be ignored but in general will stops the ongoing operation). Scripts are stored under /etc/libvirt/hook/ (or rather $SYSCONF_DIR/libvirt/hook/) if missing no script invocation will ever be done. There is one script per 'driver' there is currently hooks for the daemon, qemu and lxc, so right now only /etc/libvirt/hook/daemon /etc/libvirt/hook/qemu /etc/libvirt/hook/lxc are potentially used. The implemented set of operations is rather simple currently daemon start, reload, and exit, and for domain operations, domain startup and exit. This can be extended to more drivers in the future of more fine-grained modularity for the scripts. The current API to the script israther simple it get passed arguments about the object name, the operation name, suboperation, and an extra string. Right now for the daemon the script would get the fallowing calls: /etc/libvirt/hooks/daemon - start - start /etc/libvirt/hooks/daemon - reload begin SIGHUP /etc/libvirt/hooks/daemon - shutdown - shutdown and for qemu (or lxc): /etc/libvirt/hooks/qemu RHEL-5.4-64 start begin - /etc/libvirt/hooks/qemu RHEL-5.4-64 stopped end - with the XML configuration of the domain passed on the script stdin if needed. In case of script failure at domain startup, this is raised as an normal error, e.g.: [root@paphio tmp]# virsh start RHEL-5.4-64 error: Failed to start domain RHEL-5.4-64 error: Hook script execution failed: Hook script /etc/libvirt/hooks/qemu qemu failed with error code 256:forbidden startup [root@paphio tmp]# Some hooks could certainly be added at different place in domain lifetime operations, for example we plan to add some for migration, but one thing to remember is that those synchronous scripts can have a serious impact on execution, so to some extend it's better to use the asynchronous async event mechanism when possible. Among the things left to improve and check, there is the behaviour when the daemon is started by the user for example for qemu:///user and double check some of the script interaction with security, SELinux in particular. But the basics are there, and I would hope to have this in the next release, Daniel -- Daniel Veillard | libxml Gnome XML XSLT toolkit http://xmlsoft.org/ daniel(a)veillard.com | Rpmfind RPM search engine http://rpmfind.net/ http://veillard.com/ | virtualization library http://libvirt.org/

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[libvirt] virsh setmaxmem
by Chris Lalancette 30 Mar '10

30 Mar '10

All, My recent patch to remove qemudDomainSetMaxMem() revealed some surprising (to me) behavior of "virsh setmaxmem". In particular, if you run setmaxmem, and the hypervisor doesn't support it, this fact will be reported to you. However, if the amount you were setting for maxmem happens to be lower than "currentMemory", setmaxmem will silently balloon down the domain for you. This is a surprising result exactly because virsh reports error, but did something anyway. What I would expect is that if a hypervisor doesn't support virDomainSetMaxMem(), nothing at all is done. If we agree that this is behavior that needs to be fixed, I would suggest that we move the code to do the auto-ballooning into each of the individual drivers that *do* support virDomainSetMaxMem(). Currently that includes the test driver, the LXC driver, and the Xen driver. This way, we maintain the current behavior for the hypervisors that support this call, and make sure not to do anything at all for the hypervisors that do not. Opinions? -- Chris Lalancette

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[libvirt] [PATCH 0/4] Add timer element to domain clock elements
by Laine Stump 30 Mar '10

30 Mar '10

This patchset implements the XML described in http://www.redhat.com/archives/libvir-list/2010-March/msg00304.html (with one small change - the tickpolicy 'none' was changed to 'delay' after a later discussion). It also implements the qemu backend for those timer types that qemu supports. One thing to point out to 'early adopters': qemu's driftfix option is currently broken, so if you try to specify a tickpolicy=catchup in an rtc timer, the domain will give an error on startup. A patch for that has been posted by Zach Amsden to qemu-devel: http://lists.gnu.org/archive/html/qemu-devel/2010-03/msg02036.html Backends for other hypervisors have not been implemented. That is left as an exercise for later ;-)

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