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[Libvir] Dom0 and entitlement
by Katti, Vadiraj (STSD-Openview) 21 Jan '08

21 Jan '08

Hi, I've some questions related to xen. Can anybody help me regarding the following questions. 1. Is dom0 a logical system(like any other vm's that are configured on it) ? If yes, then all xm commands should be applicable to it (ex : vcpu-set) . 2. /proc on dom0 reflects the physical or logical utilization. 3. Is there any entitelment concept in xen for cpu and memory? What is cpu weight used for and how is set. 4. virt-manager shows physical or logical utilization (cpu, memory) 5. How do i get the IP address of each of the guests from dom0 ? 6. What are the interfaces in domU to tell me that its a guest (or dom0) and also the type of virtualization ( eg. XEN/ VMWARE etc ) Thanks, Vadiraj

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[Libvir] Question about building libvirt on Windows
by Atsushi SAKAI 21 Jan '08

21 Jan '08

Hi, Rich I try to build on current libvirt on Windows. But failed in attached compilation message. I would be appreciate If you have any suggestions. My Instruction is follows. build cygwinenvironment. Install gettext-devel, gnutls, gnutls-devel additionally. install sunrpc-4.0-4 on / compile libvirt(current) and fails and get attached message. I have not added any additional patches to libvirt. Thanks Atsushi SAKAI

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[Libvir] Windows support document seems little bit old.
by Atsushi SAKAI 21 Jan '08

21 Jan '08

Hi, Rich I am trying to build libvirt on Windows for checking Xen domain operation. I am doing this based on following instruction. http://libvirt.org/windows.html Anyway Your document seems old. since the suggest patch is already applied to libvirt itself. Is there any plan to update it? Thanks Atsushi SAKAI

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[Libvir] OCaml libvirt 0.4.0.2 released
by Richard W.M. Jones 21 Jan '08

21 Jan '08

This is an experimental release of the OCaml libvirt bindings and tools. The main changes are that we have moved to automatically generating as many of the C bindings as possible, and this includes experimental support for the libvirt storage API. Main site: http://libvirt.org/ocaml/ Source tarball: http://libvirt.org/sources/ocaml/ocaml-libvirt-0.4.0.2.tar.gz Changes: http://libvirt.org/ocaml/ChangeLog.txt I've revamped and improved the API documentation. You can find full API documentation here: http://libvirt.org/ocaml/html/Libvirt.html Example module - the job control API: http://libvirt.org/ocaml/html/Libvirt.Job.html Rich. -- Emerging Technologies, Red Hat - http://et.redhat.com/~rjones/ Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 03798903

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[Libvir] [PATCH] NIC should define in order
by Hiroyuki Kaguchi 21 Jan '08

21 Jan '08

Currently NIC definition order is reversed. If we set over 4-NICs for a domain by virt-install, this causes a network communication problem. This is because virtual mac to eth relation is lost. This patch fixes the NIC definition order. N.B. If less than 3-NICs, this problem does not occur. Sign-off-by: Hiroyuki Kaguchi <fj7025cf(a)aa.jp.fujitsu.com> Index: xm_internal.c =================================================================== RCS file: /data/cvs/libvirt/src/xm_internal.c,v retrieving revision 1.53 diff -u -p -r1.53 xm_internal.c --- xm_internal.c 14 Dec 2007 15:51:42 -0000 1.53 +++ xm_internal.c 16 Jan 2008 00:43:17 -0000 @@ -2232,7 +2232,7 @@ virConfPtr xenXMParseXMLToConfig(virConn } vifs->type = VIR_CONF_LIST; vifs->list = NULL; - for (i = 0; i < obj->nodesetval->nodeNr; i++) { + for (i = obj->nodesetval->nodeNr - 1; i >= 0; i--) { virConfValuePtr thisVif; char *vif = xenXMParseXMLVif(conn, obj->nodesetval->nodeTab[i], hvm); if (!vif)

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[Libvir] What do the docs/APIchunk*.html files do ?
by Daniel P. Berrange 21 Jan '08

21 Jan '08

Whenever we change any of the embedded API docs or add new APIs we end up with huge diffs on the docs/APIchunk*.html files. These HTML files don't seem to be visible anywhere on the website, nor are there even any <a href> links to them in other pages on the website. Can we just kill off these APIchunk* files from the doc generator in CVS Dan. -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: http://search.cpan.org/~danberr/ -=| |=- Projects: http://freshmeat.net/~danielpb/ -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|

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[Libvir] PATCH: Add xstrtol variants for long long
by Daniel P. Berrange 20 Jan '08

20 Jan '08

Jim's xstrtol convenience function simplified the use of strtol, but only support the 'int' variant. For the storage drivers I need a similar function that will always be at minimum 64-bit since we may have files > 2 GB even on 32-bit. So this adds a variant of the xstrtol functions which use a long long / unsigned long long type Regards, Dan. diff -r 83e80c558f4d src/internal.h --- a/src/internal.h Wed Jan 16 09:28:01 2008 -0500 +++ b/src/internal.h Wed Jan 16 09:28:05 2008 -0500 @@ -304,6 +304,42 @@ xstrtol_ui(char const *s, char **end_ptr return 0; } +static inline int +xstrtol_ll(char const *s, char **end_ptr, int base, long long *result) +{ + long long val; + char *p; + int err; + + errno = 0; + val = strtoll(s, &p, base); + err = (errno || (!end_ptr && *p) || p == s || (long long) val != val); + if (end_ptr) + *end_ptr = p; + if (err) + return -1; + *result = val; + return 0; +} + +/* Just like xstrtol_i, above, but produce an "unsigned long long" value. */ +static inline int +xstrtol_ull(char const *s, char **end_ptr, int base, unsigned long long *result) +{ + unsigned long long val; + char *p; + int err; + + errno = 0; + val = strtoull(s, &p, base); + err = (errno || (!end_ptr && *p) || p == s || (unsigned long long) val != val); + if (end_ptr) + *end_ptr = p; + if (err) + return -1; + *result = val; + return 0; +} #ifdef __cplusplus } #endif /* __cplusplus */ Dan. -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: http://search.cpan.org/~danberr/ -=| |=- Projects: http://freshmeat.net/~danielpb/ -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|

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[Libvir] PATCH: RFC: env var to set default connection URI
by Daniel P. Berrange 20 Jan '08

20 Jan '08

Currently, if the app provides NULL as the connect URI, we always connect to a Xen hypervisor. virsh provides a VIR_DEFAULT_CONNECT_URI env var which can be used to override this. virt-install/virt-manager never use NULL, and now try to 'guess' a default URI based on whether /dev/kvm or /proc/xen exist. Users have requested that VIR_DEFAULT_CONNECT_URI apply to other apps besides virsh. So this patch adds support for LIBVIRT_DEFAULT_URI env variable which will be used if the connect URI is NULL. If that variable is not set it will still default to Xen. diff -r 673c98e11c78 src/libvirt.c --- a/src/libvirt.c Wed Jan 16 09:27:56 2008 -0500 +++ b/src/libvirt.c Wed Jan 16 09:28:00 2008 -0500 @@ -516,8 +516,13 @@ do_open (const char *name, xmlURIPtr uri; /* Convert NULL or "" to xen:/// for back compat */ - if (!name || name[0] == '\0') - name = "xen:///"; + if (!name || name[0] == '\0') { + char *defname = getenv("LIBVIRT_DEFAULT_URI"); + if (defname && *defname) + name = defname; + else + name = "xen:///"; + } /* Convert xen -> xen:/// for back compat */ if (!strcasecmp(name, "xen")) Regards, Dan. -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: http://search.cpan.org/~danberr/ -=| |=- Projects: http://freshmeat.net/~danielpb/ -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|

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[Libvir] PATCH: Fix compat for Xen 3.2.0
by Daniel P. Berrange 20 Jan '08

20 Jan '08

Xen 3.2.0 removed the sockets_per_node field from the nodeinfo data returned by XenD. I previously add compat for this, but got it in the wrong place so it would most likely end up in a divide-by-zero error. This patch re-arranges it to be correct. diff -rup libvirt-0.4.0.orig/src/xend_internal.c libvirt-0.4.0.new/src/xend_internal.c --- libvirt-0.4.0.orig/src/xend_internal.c 2007-12-17 18:05:27.000000000 -0500 +++ libvirt-0.4.0.new/src/xend_internal.c 2008-01-18 21:13:30.000000000 -0500 @@ -1907,6 +1907,9 @@ sexpr_to_xend_node_info(struct sexpr *ro info->mhz = sexpr_int(root, "node/cpu_mhz"); info->nodes = sexpr_int(root, "node/nr_nodes"); info->sockets = sexpr_int(root, "node/sockets_per_node"); + info->cores = sexpr_int(root, "node/cores_per_socket"); + info->threads = sexpr_int(root, "node/threads_per_core"); + /* Xen 3.2.0 replaces sockets_per_node with 'nr_cpus'. * Old Xen calculated sockets_per_node using its internal * nr_cpus / (nodes*cores*threads), so fake it ourselves @@ -1921,8 +1924,6 @@ sexpr_to_xend_node_info(struct sexpr *ro if (info->sockets == 0) info->sockets = 1; } - info->cores = sexpr_int(root, "node/cores_per_socket"); - info->threads = sexpr_int(root, "node/threads_per_core"); return (0); } Dan. -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: http://search.cpan.org/~danberr/ -=| |=- Projects: http://freshmeat.net/~danielpb/ -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|

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[Libvir] PATCH: make debug builds quiet by default
by Daniel P. Berrange 19 Jan '08

19 Jan '08

During development I like to have the --enable-debug flag enabled all the time because its very handy at times. I don't want it spewing to stderr all the time though, just because I turned on the compile option. So this patch adds an env variable 'LIBVIRT_DEBUG' which controls whether it is chatty or not. So with this patch you can use --enable-debug all the time, and just run LIBVIRT_DEBUG=1 ./src/virsh .... to turn it on for a particular test, or likewise for the daemon LIBVIRT_DEBUG=1 ./qemud/libvirtd Dan. libvirt.c | 64 +++++++++++++++++++++++++++++++++++--------------------------- 1 file changed, 37 insertions(+), 27 deletions(-) diff -r c747561694fc src/libvirt.c --- a/src/libvirt.c Tue Jan 08 23:52:20 2008 -0500 +++ b/src/libvirt.c Tue Jan 08 23:53:57 2008 -0500 @@ -59,10 +59,11 @@ static int initialized = 0; * are printed to stderr for debugging. */ #ifdef ENABLE_DEBUG +static int debugFlag = 0; #define DEBUG(fs,...) \ - fprintf (stderr, "libvirt: %s (" fs ")\n", __func__, __VA_ARGS__) + do { if (debugFlag) fprintf (stderr, "libvirt: %s (" fs ")\n", __func__, __VA_ARGS__); } while (0) #define DEBUG0 \ - fprintf (stderr, "libvirt: %s ()\n", __func__) + do { if (debugFlag) fprintf (stderr, "libvirt: %s ()\n", __func__); } while (0) #else #define DEBUG0 #define DEBUG(fs,...) @@ -179,10 +180,20 @@ int int virInitialize(void) { - DEBUG0; +#ifdef ENABLE_DEBUG + char *debugEnv; +#endif if (initialized) return(0); initialized = 1; + +#ifdef ENABLE_DEBUG + debugEnv = getenv("LIBVIRT_DEBUG"); + if (debugEnv && *debugEnv) + debugFlag = 1; +#endif + + DEBUG0; #if HAVE_WINSOCK2_H if (winsock_init () == -1) return -1; @@ -543,18 +554,17 @@ do_open (const char *name, } #ifdef ENABLE_DEBUG - fprintf (stderr, - "libvirt: do_open: name \"%s\" to URI components:\n" - " scheme %s\n" - " opaque %s\n" - " authority %s\n" - " server %s\n" - " user %s\n" - " port %d\n" - " path %s\n", - name, - uri->scheme, uri->opaque, uri->authority, uri->server, - uri->user, uri->port, uri->path); + DEBUG("libvirt: do_open: name \"%s\" to URI components:\n" + " scheme %s\n" + " opaque %s\n" + " authority %s\n" + " server %s\n" + " user %s\n" + " port %d\n" + " path %s\n", + name, + uri->scheme, uri->opaque, uri->authority, uri->server, + uri->user, uri->port, uri->path); #endif ret->name = strdup (name); @@ -565,16 +575,16 @@ do_open (const char *name, for (i = 0; i < virDriverTabCount; i++) { #ifdef ENABLE_DEBUG - fprintf (stderr, "libvirt: do_open: trying driver %d (%s) ...\n", - i, virDriverTab[i]->name); + DEBUG("libvirt: do_open: trying driver %d (%s) ...\n", + i, virDriverTab[i]->name); #endif res = virDriverTab[i]->open (ret, uri, auth, flags); #ifdef ENABLE_DEBUG - fprintf (stderr, "libvirt: do_open: driver %d %s returned %s\n", - i, virDriverTab[i]->name, - res == VIR_DRV_OPEN_SUCCESS ? "SUCCESS" : - (res == VIR_DRV_OPEN_DECLINED ? "DECLINED" : - (res == VIR_DRV_OPEN_ERROR ? "ERROR" : "unknown status"))); + DEBUG("libvirt: do_open: driver %d %s returned %s\n", + i, virDriverTab[i]->name, + res == VIR_DRV_OPEN_SUCCESS ? "SUCCESS" : + (res == VIR_DRV_OPEN_DECLINED ? "DECLINED" : + (res == VIR_DRV_OPEN_ERROR ? "ERROR" : "unknown status"))); #endif if (res == VIR_DRV_OPEN_ERROR) goto failed; else if (res == VIR_DRV_OPEN_SUCCESS) { @@ -592,11 +602,11 @@ do_open (const char *name, for (i = 0; i < virNetworkDriverTabCount; i++) { res = virNetworkDriverTab[i]->open (ret, uri, auth, flags); #ifdef ENABLE_DEBUG - fprintf (stderr, "libvirt: do_open: network driver %d %s returned %s\n", - i, virNetworkDriverTab[i]->name, - res == VIR_DRV_OPEN_SUCCESS ? "SUCCESS" : - (res == VIR_DRV_OPEN_DECLINED ? "DECLINED" : - (res == VIR_DRV_OPEN_ERROR ? "ERROR" : "unknown status"))); + DEBUG("libvirt: do_open: network driver %d %s returned %s\n", + i, virNetworkDriverTab[i]->name, + res == VIR_DRV_OPEN_SUCCESS ? "SUCCESS" : + (res == VIR_DRV_OPEN_DECLINED ? "DECLINED" : + (res == VIR_DRV_OPEN_ERROR ? "ERROR" : "unknown status"))); #endif if (res == VIR_DRV_OPEN_ERROR) { if (STREQ(virNetworkDriverTab[i]->name, "remote")) { Regards, Dan. -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: http://search.cpan.org/~danberr/ -=| |=- Projects: http://freshmeat.net/~danielpb/ -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|

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