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[libvirt] [PATCH] xm_internal.c: remove misleading dead code
by Jim Meyering 15 Dec '09

15 Dec '09

This code triggered a warning about possible NULL-dereference. Actually it's more about being self-contradictory, since the NULL-dereference is not possible. >From 796e3a3254cb08fc20bce790997b5787dab51902 Mon Sep 17 00:00:00 2001 From: Jim Meyering <meyering(a)redhat.com> Date: Mon, 14 Dec 2009 21:37:54 +0100 Subject: [PATCH] xm_internal.c: remove misleading dead code * src/xen/xm_internal.c (xenXMConfigGetULong): Remove useless and misleading test (always false) for val->str == NULL before code that always dereferences val->str. "val" comes from virConfGetValue, and at that point, val->str is guaranteed to be non-NULL. (xenXMConfigGetBool): Likewise. --- src/xen/xm_internal.c | 6 ------ 1 files changed, 0 insertions(+), 6 deletions(-) diff --git a/src/xen/xm_internal.c b/src/xen/xm_internal.c index 3dc655b..944d5d5 100644 --- a/src/xen/xm_internal.c +++ b/src/xen/xm_internal.c @@ -152,9 +152,6 @@ static int xenXMConfigGetBool(virConnectPtr conn, if (val->type == VIR_CONF_LONG) { *value = val->l ? 1 : 0; } else if (val->type == VIR_CONF_STRING) { - if (!val->str) { - *value = def; - } *value = STREQ(val->str, "1") ? 1 : 0; } else { xenXMError(conn, VIR_ERR_INTERNAL_ERROR, @@ -183,9 +180,6 @@ static int xenXMConfigGetULong(virConnectPtr conn, *value = val->l; } else if (val->type == VIR_CONF_STRING) { char *ret; - if (!val->str) { - *value = def; - } *value = strtol(val->str, &ret, 10); if (ret == val->str) { xenXMError(conn, VIR_ERR_INTERNAL_ERROR, -- 1.6.6.rc2.275.g51e2d

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[libvirt] [PATCH] avoid calling exit with a constant; use EXIT_* instead
by Jim Meyering 15 Dec '09

15 Dec '09

Without this, and with updated gnulib, "make syntax-check" would fail, complaining about exit(1), exit(0), exit(77). It's no big deal, but slightly better for readability to use EXIT_SUCCESS, EXIT_FAILURE, and the new, made-up/defined EXIT_AM_SKIP. The only semantic change was to convert the "exit(2)" and "exit(3)" in tests/conftest.c to "exit(EXIT_FAILURE);". That seems ok, since the sole invoker of that test program cares only about success/failure, and not about the precise exit code. >From 8dba638f597b50f295f3f9b5628002f39b16d776 Mon Sep 17 00:00:00 2001 From: Jim Meyering <meyering(a)redhat.com> Date: Tue, 15 Dec 2009 09:43:29 +0100 Subject: [PATCH] avoid calling exit with a constant; use EXIT_* instead This appeases a new gnulib-provided "syntax-check". * daemon/libvirtd.c (main): Use EXIT_FAILURE, not 1. * proxy/libvirt_proxy.c (main): Likewise, and EXIT_SUCCESS, not 0. * tests/conftest.c (main): Likewise. * tests/reconnect.c (main): Likewise. * tests/testutils.h (EXIT_AM_SKIP): Define. * tests/nodeinfotest.c (mymain): Use EXIT_AM_SKIP, not 77. * tests/qemuargv2xmltest.c: Likewise. * tests/qemuxml2xmltest.c: Likewise. * tests/virshtest.c (mymain): Likewise. --- daemon/libvirtd.c | 2 +- proxy/libvirt_proxy.c | 10 +++++----- tests/conftest.c | 10 +++++----- tests/nodeinfotest.c | 2 +- tests/qemuargv2xmltest.c | 2 +- tests/qemuxml2xmltest.c | 2 +- tests/reconnect.c | 10 +++++----- tests/testutils.h | 4 +++- tests/virshtest.c | 2 +- 9 files changed, 23 insertions(+), 21 deletions(-) diff --git a/daemon/libvirtd.c b/daemon/libvirtd.c index de6fc27..281a46a 100644 --- a/daemon/libvirtd.c +++ b/daemon/libvirtd.c @@ -3036,7 +3036,7 @@ int main(int argc, char **argv) { default: fprintf (stderr, "libvirtd: internal error: unknown flag: %c\n", c); - exit (1); + exit (EXIT_FAILURE); } } diff --git a/proxy/libvirt_proxy.c b/proxy/libvirt_proxy.c index e5298fd..375966c 100644 --- a/proxy/libvirt_proxy.c +++ b/proxy/libvirt_proxy.c @@ -816,14 +816,14 @@ int main(int argc, char **argv) { persist = 1; } else { usage(argv[0]); - exit(1); + exit(EXIT_FAILURE); } } if (geteuid() != 0) { fprintf(stderr, "%s must be run as root or suid\n", argv[0]); - /* exit(1); */ + /* exit(EXIT_FAILURE); */ } /* @@ -838,19 +838,19 @@ int main(int argc, char **argv) { * failure. */ if (proxyListenUnixSocket(PROXY_SOCKET_PATH) < 0) - exit(0); + exit(EXIT_SUCCESS); if (proxyInitXen() == 0) proxyMainLoop(); sleep(1); proxyCloseUnixSocket(); - exit(0); + exit(EXIT_SUCCESS); } #else /* WITHOUT_XEN */ int main(void) { fprintf(stderr, "libvirt was compiled without Xen support\n"); - exit(1); + exit(EXIT_FAILURE); } #endif /* WITH_XEN */ diff --git a/tests/conftest.c b/tests/conftest.c index d265de2..a7977bb 100644 --- a/tests/conftest.c +++ b/tests/conftest.c @@ -15,23 +15,23 @@ int main(int argc, char **argv) { if (argc != 2) { fprintf(stderr, "Usage: %s conf_file\n", argv[0]); - exit(1); + exit(EXIT_FAILURE); } conf = virConfReadFile(argv[1], 0); if (conf == NULL) { fprintf(stderr, "Failed to process %s\n", argv[1]); - exit(2); + exit(EXIT_FAILURE); } ret = virConfWriteMem(&buffer[0], &len, conf); if (ret < 0) { fprintf(stderr, "Failed to serialize %s back\n", argv[1]); - exit(3); + exit(EXIT_FAILURE); } virConfFree(conf); if (fwrite(buffer, 1, len, stdout) != len) { fprintf(stderr, "Write failed: %s\n", strerror (errno)); - exit(1); + exit(EXIT_FAILURE); } - exit(0); + exit(EXIT_SUCCESS); } diff --git a/tests/nodeinfotest.c b/tests/nodeinfotest.c index 608a056..4cb248a 100644 --- a/tests/nodeinfotest.c +++ b/tests/nodeinfotest.c @@ -15,7 +15,7 @@ static int mymain(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED) { - exit (77); /* means 'test skipped' for automake */ + exit (EXIT_AM_SKIP); } #else diff --git a/tests/qemuargv2xmltest.c b/tests/qemuargv2xmltest.c index 5602df0..7f62bac 100644 --- a/tests/qemuargv2xmltest.c +++ b/tests/qemuargv2xmltest.c @@ -232,6 +232,6 @@ VIRT_TEST_MAIN(mymain) #else -int main (void) { return (77); /* means 'test skipped' for automake */ } +int main (void) { return (EXIT_AM_SKIP); } #endif /* WITH_QEMU */ diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c index 793900c..e5900a2 100644 --- a/tests/qemuxml2xmltest.c +++ b/tests/qemuxml2xmltest.c @@ -146,6 +146,6 @@ VIRT_TEST_MAIN(mymain) #else -int main (void) { exit (77); /* means 'test skipped' to automake */ } +int main (void) { exit (EXIT_AM_SKIP); } #endif /* WITH_QEMU */ diff --git a/tests/reconnect.c b/tests/reconnect.c index 33af2cc..63877fc 100644 --- a/tests/reconnect.c +++ b/tests/reconnect.c @@ -24,12 +24,12 @@ int main(void) { } if (conn == NULL) { fprintf(stderr, "First virConnectOpen() failed\n"); - exit(1); + exit(EXIT_FAILURE); } dom = virDomainLookupByID(conn, id); if (dom == NULL) { fprintf(stderr, "First lookup for domain %d failed\n", id); - exit(1); + exit(EXIT_FAILURE); } virDomainFree(dom); virConnectClose(conn); @@ -39,16 +39,16 @@ int main(void) { conn = virConnectOpen(NULL); if (conn == NULL) { fprintf(stderr, "Second virConnectOpen() failed\n"); - exit(1); + exit(EXIT_FAILURE); } dom = virDomainLookupByID(conn, id); if (dom == NULL) { fprintf(stderr, "Second lookup for domain %d failed\n", id); - exit(1); + exit(EXIT_FAILURE); } virDomainFree(dom); virConnectClose(conn); printf("OK\n"); - exit(0); + exit(EXIT_SUCCESS); } diff --git a/tests/testutils.h b/tests/testutils.h index aef1179..e5d5750 100644 --- a/tests/testutils.h +++ b/tests/testutils.h @@ -1,7 +1,7 @@ /* * utils.c: test utils * - * Copyright (C) 2005, 2008 Red Hat, Inc. + * Copyright (C) 2005, 2008-2009 Red Hat, Inc. * * See COPYING.LIB for the License of this software * @@ -13,6 +13,8 @@ #include <stdio.h> +#define EXIT_AM_SKIP 77 /* tell Automake we're skipping a test */ + double virtTestCountAverage(double *items, int nitems); diff --git a/tests/virshtest.c b/tests/virshtest.c index ef760e2..ad3e2fc 100644 --- a/tests/virshtest.c +++ b/tests/virshtest.c @@ -231,7 +231,7 @@ mymain(int argc, char **argv) abs_srcdir = getcwd(cwd, sizeof(cwd)); #ifdef WIN32 - exit (77); /* means 'test skipped' for automake */ + exit (EXIT_AM_SKIP); #endif snprintf(buffer, PATH_MAX-1, "test://%s/../examples/xml/test/testnode.xml", abs_srcdir); -- 1.6.6.rc2.275.g51e2d

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[libvirt] [PATCH] avoid malfunction when virFileResolveLink is applied to non-POSIX FS
by Jim Meyering 15 Dec '09

15 Dec '09

Without this patch, virFileResolveLink could misbehave when applied to a file on a POSIX-nonconforming file system. The fix is to use gnulib's areadlink module, but it's GPL'd. I'm ready to relax it to LGPLv2+, and have asked the other author for his rubber stamp. Once that's fixed, this change will depend on having an up-to-date gnulib submodule. That will be the subject of my next message. >From a3133b2e8b1453578b30e4b9c83c7473feb7c65b Mon Sep 17 00:00:00 2001 From: Jim Meyering <meyering(a)redhat.com> Date: Tue, 15 Dec 2009 08:27:53 +0100 Subject: [PATCH] avoid malfunction when virFileResolveLink is applied to non-POSIX FS The virFileResolveLink utility function relied on the POSIX guarantee that stat.st_size of a symlink is the length of the value. However, on some types of file systems, it is invalid, so do not rely on it. Use gnulib's areadlink module instead. * bootstrap (modules): Add areadlink. * src/util/util.c: Include "areadlink.h". Let areadlink perform the readlink and malloc. * configure.in (AC_CHECK_FUNCS): Remove readlink. No need, since it's presence is guaranteed by gnulib. --- bootstrap | 1 + configure.in | 2 +- src/util/util.c | 27 +++------------------------ 3 files changed, 5 insertions(+), 25 deletions(-) diff --git a/bootstrap b/bootstrap index 667af4f..c07d851 100755 --- a/bootstrap +++ b/bootstrap @@ -65,6 +65,7 @@ gnulib_tool=$GNULIB_SRCDIR/gnulib-tool <$gnulib_tool || exit modules=' +areadlink base64 c-ctype close diff --git a/configure.in b/configure.in index 6135932..6ed2efd 100644 --- a/configure.in +++ b/configure.in @@ -83,7 +83,7 @@ dnl Use --disable-largefile if you don't want this. AC_SYS_LARGEFILE dnl Availability of various common functions (non-fatal if missing). -AC_CHECK_FUNCS([cfmakeraw regexec uname sched_getaffinity getuid getgid posix_fallocate mmap readlink]) +AC_CHECK_FUNCS([cfmakeraw regexec uname sched_getaffinity getuid getgid posix_fallocate mmap]) dnl Availability of various not common threadsafe functions AC_CHECK_FUNCS([strerror_r strtok_r getmntent_r getgrnam_r getpwuid_r]) diff --git a/src/util/util.c b/src/util/util.c index 694838a..44a4b2f 100644 --- a/src/util/util.c +++ b/src/util/util.c @@ -64,6 +64,7 @@ #include <mntent.h> #endif +#include "areadlink.h" #include "virterror_internal.h" #include "logging.h" #include "event.h" @@ -1059,10 +1060,7 @@ int virFileLinkPointsTo(const char *checkLink, int virFileResolveLink(const char *linkpath, char **resultpath) { -#ifdef HAVE_READLINK struct stat st; - char *buf; - int n; *resultpath = NULL; @@ -1075,28 +1073,9 @@ int virFileResolveLink(const char *linkpath, return 0; } - /* Posix says that 'st_size' field from - * result of an lstat() call is filled with - * number of bytes in the destination - * filename. - */ - if (VIR_ALLOC_N(buf, st.st_size + 1) < 0) - return -ENOMEM; - - if ((n = readlink(linkpath, buf, st.st_size)) < 0) { - VIR_FREE(buf); - return -errno; - } - - buf[n] = '\0'; + *resultpath = areadlink (linkpath); - *resultpath = buf; - return 0; -#else - if (!(*resultpath = strdup(linkpath))) - return -ENOMEM; - return 0; -#endif + return *resultpath == NULL ? -1 : 0; } /* -- 1.6.6.rc2.275.g51e2d

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[libvirt] [PATCH] qemu migration: avoid NULL-deref given an invalid input
by Jim Meyering 15 Dec '09

15 Dec '09

The fix here is to add the missing "goto". Nearly every other use of qemudReportError is followed closely by a goto or a return statement. >From 898033ec5bb0399f7cc6a22ffd9f351552ced85b Mon Sep 17 00:00:00 2001 From: Jim Meyering <meyering(a)redhat.com> Date: Mon, 14 Dec 2009 17:02:56 +0100 Subject: [PATCH] qemu migration: avoid NULL-deref given an invalid input * src/qemu/qemu_driver.c (doNonTunnelMigrate): Don't let a NULL "uri_out" provoke a NULL-dereference in doNativeMigrate: supply omitted goto-after-qemudReportError. --- src/qemu/qemu_driver.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index c782f0d..9ef6c35 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -7430,6 +7430,7 @@ static int doNonTunnelMigrate(virDomainPtr dom, if (uri_out == NULL) { qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("domainMigratePrepare2 did not set uri")); + goto cleanup; } if (doNativeMigrate(dom, driver, vm, uri_out, flags, dname, resource) < 0) -- 1.6.6.rc2.275.g51e2d

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[libvirt] [PATCH] qemu_driver.c: don't unlink(NULL) on OOM error path
by Jim Meyering 15 Dec '09

15 Dec '09

Not terribly likely, but not impossible, either: >From dc8fe76ed209d04b1e962b94b20da17a077e102f Mon Sep 17 00:00:00 2001 From: Jim Meyering <meyering(a)redhat.com> Date: Mon, 14 Dec 2009 16:41:11 +0100 Subject: [PATCH] qemu_driver.c: don't unlink(NULL) on OOM error path * src/qemu/qemu_driver.c (qemudDomainMigratePrepareTunnel): Upon an out of memory error, we would end up with unixfile==NULL and attempt to unlink(NULL). Skip the unlink when it's NULL. --- src/qemu/qemu_driver.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 56bcec5..04b2511 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -6903,7 +6903,8 @@ endjob: cleanup: virDomainDefFree(def); - unlink(unixfile); + if (unixfile) + unlink(unixfile); VIR_FREE(unixfile); if (vm) virDomainObjUnlock(vm); -- 1.6.6.rc2.275.g51e2d

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[libvirt] [PATCH] qemu_driver.c: avoid double free on error path
by Jim Meyering 15 Dec '09

15 Dec '09

Note that there's nearly identical code in the same file where there is already an "event = NULL;" statement right after two identical lines. >From 69f3c74b6cdc36fb4958f4c9cc2d4497a03d40c1 Mon Sep 17 00:00:00 2001 From: Jim Meyering <meyering(a)redhat.com> Date: Mon, 14 Dec 2009 15:55:19 +0100 Subject: [PATCH] qemu_driver.c: avoid double free on error path * src/qemu/qemu_driver.c (qemudDomainMigrateFinish2): Set "event" to NULL after qemuDomainEventQueue frees it, so a subsequent free (after endjob label) upon qemuMonitorStartCPUs failure does not cause a double free. --- src/qemu/qemu_driver.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 34fa582..43f7927 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -7668,6 +7668,7 @@ qemudDomainMigrateFinish2 (virConnectPtr dconn, VIR_DOMAIN_EVENT_DEFINED_UPDATED); if (event) qemuDomainEventQueue(driver, event); + event = NULL; } qemuDomainObjPrivatePtr priv = vm->privateData; -- 1.6.6.rc2.275.g51e2d

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[libvirt] [PATCH] virsh: avoid double-free
by Jim Meyering 15 Dec '09

15 Dec '09

I didn't try to trigger the double free, but it looks feasible. >From 864cc161ffaf6c08cb980e66a673b53ac5ea52ab Mon Sep 17 00:00:00 2001 From: Jim Meyering <meyering(a)redhat.com> Date: Mon, 14 Dec 2009 14:34:29 +0100 Subject: [PATCH] virsh: avoid double-free * tools/virsh.c (vshCommandParse): Avoid double-free of "tkdata". Set it to NULL immediately after free in the (cmd == NULL) case, just as in the other case, in case the final free(tkdata) is triggered by a syntax error. --- tools/virsh.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/tools/virsh.c b/tools/virsh.c index 62c1270..0312945 100644 --- a/tools/virsh.c +++ b/tools/virsh.c @@ -8044,6 +8044,7 @@ vshCommandParse(vshControl *ctl, char *cmdstr) goto syntaxError; /* ... or ignore this command only? */ } free(tkdata); + tkdata = NULL; } else if (tk == VSH_TK_OPTION) { if (!(opt = vshCmddefGetOption(cmd, tkdata))) { vshError(ctl, -- 1.6.6.rc2.275.g51e2d

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[libvirt] [PATCH] remote_driver.c: also zero out ->saslDecodedOffset member
by Jim Meyering 15 Dec '09

15 Dec '09

Technically, the initialization of ->saslDecodedOffset is not required, but... What could go wrong if saslDecodedOffset is left with some positive value in the if-block below? Well, in that same if-block priv->saslDecoded is set to NULL, and in that case, the code above *usually* sets priv->saslDecodedOffset to 0, but not if we hit one of the intervening returns. In that case, you have to wonder if priv->saslDecoded can be set to non-NULL, yet with priv->saslDecodedOffset still left with the now-bogus positive value. In that case, with an initial saslDecodedLength of 0, we'd compute this: wantData = (priv->saslDecodedLength - priv->saslDecodedOffset and that would be negative. The very next statement would cause trouble, as the negative value treated-as-size_t would wreak havoc: memcpy(priv->buffer + priv->bufferOffset, priv->saslDecoded + priv->saslDecodedOffset, wantData); Luckily, the semantics of sasl_decode ensure that does not happen. Hence, an alternate (though riskier) patch would be to skip that of priv->saslDecodedOffset altogether. >From a3578fc03714a210678e6bcf62d162d92c9d07c0 Mon Sep 17 00:00:00 2001 From: Jim Meyering <meyering(a)redhat.com> Date: Mon, 14 Dec 2009 13:00:01 +0100 Subject: [PATCH] remote_driver.c: also zero out ->saslDecodedOffset member * src/remote/remote_driver.c (remoteIOReadMessage): ...rather than zeroing out priv->saslDecodedLength twice. --- src/remote/remote_driver.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c index affeb0f..77962fe 100644 --- a/src/remote/remote_driver.c +++ b/src/remote/remote_driver.c @@ -7782,7 +7782,7 @@ remoteIOReadMessage(virConnectPtr conn, struct private_data *priv, priv->saslDecodedOffset += wantData; priv->bufferOffset += wantData; if (priv->saslDecodedOffset == priv->saslDecodedLength) { - priv->saslDecodedLength = priv->saslDecodedLength = 0; + priv->saslDecodedOffset = priv->saslDecodedLength = 0; priv->saslDecoded = NULL; } -- 1.6.6.rc2.275.g51e2d

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[libvirt] problem connecting to vbox
by anuj rampal 15 Dec '09

15 Dec '09

Hi, I have installed VBOX 3.0.12 on fc12 which is running libvirt-0.7.1. Now when i try to connect using virsh using uri "virsh -c vbox+tcp:///system" this is the error i get: error: internal error unable to initialize VirtualBox driver API error: failed to connect to the hypervisor But it connects successfully with this ur: "virsh -c vbox:///system" i have also qemu installed on the same machine and connects successfully with uri "virsh -c qemu+tcp:///system" Libvirt is listening on tcp port:16509 any idea what am i doing wrong? Here is a detailed message: LIBVIRT_DEBUG=1 virsh -c vbox+tcp:///system 11:10:45.469: debug : virInitialize:279 : register drivers 11:10:45.495: debug : virRegisterDriver:776 : registering Test as driver 0 11:10:45.495: debug : virRegisterNetworkDriver:614 : registering Test as network driver 0 11:10:45.495: debug : virRegisterInterfaceDriver:645 : registering Test as interface driver 0 11:10:45.495: debug : virRegisterStorageDriver:676 : registering Test as storage driver 0 11:10:45.495: debug : virRegisterDeviceMonitor:707 : registering Test as device driver 0 11:10:45.495: debug : virRegisterSecretDriver:738 : registering Test as secret driver 0 11:10:45.496: debug : virRegisterDriver:776 : registering Xen as driver 1 11:10:45.496: debug : virRegisterDriver:776 : registering OPENVZ as driver 2 11:10:45.496: debug : virRegisterDriver:776 : registering PHYP as driver 3 11:10:45.506: debug : vboxRegister:80 : VBoxCGlueInit found API version: 3.0.12 (3000012) 11:10:45.506: debug : vboxRegister:92 : VirtualBox API version: 3.0 11:10:45.506: debug : virRegisterDriver:776 : registering VBOX as driver 4 11:10:45.506: debug : virRegisterNetworkDriver:614 : registering VBOX as network driver 1 11:10:45.506: debug : virRegisterStorageDriver:676 : registering VBOX as storage driver 1 11:10:45.506: debug : virRegisterDriver:776 : registering ESX as driver 5 11:10:45.506: debug : virRegisterDriver:776 : registering remote as driver 6 11:10:45.506: debug : virRegisterNetworkDriver:614 : registering remote as network driver 2 11:10:45.506: debug : virRegisterInterfaceDriver:645 : registering remote as interface driver 1 11:10:45.506: debug : virRegisterStorageDriver:676 : registering remote as storage driver 2 11:10:45.506: debug : virRegisterDeviceMonitor:707 : registering remote as device driver 1 11:10:45.506: debug : virRegisterSecretDriver:738 : registering remote as secret driver 1 11:10:45.506: debug : virConnectOpenAuth:1273 : name=vbox+tcp:///system, auth=0x43d940, flags=0 11:10:45.506: debug : do_open:1042 : name "vbox+tcp:///system" to URI components: scheme vbox+tcp opaque (null) authority (null) server (null) user (null) port 0 path /system 11:10:45.506: debug : do_open:1052 : trying driver 0 (Test) ... 11:10:45.506: debug : do_open:1058 : driver 0 Test returned DECLINED 11:10:45.506: debug : do_open:1052 : trying driver 1 (Xen) ... 11:10:45.506: debug : do_open:1058 : driver 1 Xen returned DECLINED 11:10:45.506: debug : do_open:1052 : trying driver 2 (OPENVZ) ... 11:10:45.506: debug : do_open:1058 : driver 2 OPENVZ returned DECLINED 11:10:45.506: debug : do_open:1052 : trying driver 3 (PHYP) ... 11:10:45.506: debug : do_open:1058 : driver 3 PHYP returned DECLINED 11:10:45.506: debug : do_open:1052 : trying driver 4 (VBOX) ... 11:10:45.506: debug : do_open:1058 : driver 4 VBOX returned DECLINED 11:10:45.506: debug : do_open:1052 : trying driver 5 (ESX) ... 11:10:45.506: debug : do_open:1058 : driver 5 ESX returned DECLINED 11:10:45.506: debug : do_open:1052 : trying driver 6 (remote) ... 11:10:45.506: debug : doRemoteOpen:535 : proceeding with name = vbox:///system 11:10:45.508: debug : remoteIO:7421 : Do proc=66 serial=0 length=28 wait=(nil) 11:10:45.508: debug : remoteIO:7483 : We have the buck 66 0xb75df008 0xb75df008 11:10:45.509: debug : remoteIODecodeMessageLength:7032 : Got length, now need 64 total (60 more) 11:10:45.509: debug : remoteIOEventLoop:7347 : Giving up the buck 66 0xb75df008 (nil) 11:10:45.509: debug : remoteIO:7514 : All done with our call 66 (nil) 0xb75df008 11:10:45.509: debug : remoteIO:7421 : Do proc=1 serial=1 length=56 wait=(nil) 11:10:45.509: debug : remoteIO:7483 : We have the buck 1 0x9fb2ea8 0x9fb2ea8 11:10:45.510: debug : remoteIODecodeMessageLength:7032 : Got length, now need 208 total (204 more) 11:10:45.510: debug : remoteIOEventLoop:7347 : Giving up the buck 1 0x9fb2ea8 (nil) 11:10:45.510: debug : remoteIO:7514 : All done with our call 1 (nil) 0x9fb2ea8 11:10:45.510: debug : do_open:1058 : driver 6 remote returned ERROR 11:10:45.510: debug : virUnrefConnect:257 : unref connection 0x9fb0b30 1 11:10:45.510: debug : virReleaseConnect:214 : release connection 0x9fb0b30 error: internal error unable to initialize VirtualBox driver API error: failed to connect to the hypervisor Regards Anuj

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Re: [libvirt] getSchedulerParameters() always returning nullpointerexception in JAVA
by Marc Gonzalez Mateo 15 Dec '09

15 Dec '09

Hi Bryan, I've applied and tested the PATCH and still does not work. Here is the console output: -> [chipiron04, Domain-0, XenTest, XenTest2, chipiron03] Dec 15, 2009 9:49:14 AM net.emotivecloud.virtmonitor.VirtMonitor getCPUPriority SEVERE: Error: getting CPU priority of "XenTest".class java.lang.NullPointerException java.lang.NullPointerException at org.libvirt.SchedParameter.create(Unknown Source) at org.libvirt.Domain.getSchedulerParameters(Unknown Source) at net.emotivecloud.virtmonitor.VirtMonitor.getCPUPriority(VirtMonitor.java:495) at net.emotivecloud.virtmonitor.VirtMonitor.main(VirtMonitor.java:775) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:616) at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:283) at java.lang.Thread.run(Thread.java:636) -1 Dec 15, 2009 9:49:14 AM net.emotivecloud.virtmonitor.VirtMonitor getCPUCapacity SEVERE: Error: getting CPU capacity of "XenTest". java.lang.NullPointerException at org.libvirt.SchedParameter.create(Unknown Source) at org.libvirt.Domain.getSchedulerParameters(Unknown Source) at net.emotivecloud.virtmonitor.VirtMonitor.getCPUCapacity(VirtMonitor.java:470) at net.emotivecloud.virtmonitor.VirtMonitor.main(VirtMonitor.java:776) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:616) at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:283) at java.lang.Thread.run(Thread.java:636) -1 Both GetCPUCapacity and GetCPUPriority use the schedparameter type. Here is the code and the main. getDomain method just returns the domain object itself and I've also tested it's not null value at this point of the code: public int getCPUCapacity(String name) { int ret = -1; try { Domain d = getDomain(name); SchedParameter[] pars= d.getSchedulerParameters(); for (SchedParameter pri : pars) { if (pri.field=="cap") ret=Integer.parseInt(pri.getValueAsString()); } } catch (Exception e) { log.error(" Error: getting CPU capacity of \""+name+"\"."); e.printStackTrace(); } return ret; } /** * Returns CPU Priority assigned to VM name * @param name * @return */ public int getCPUPriority(String name) { int res=-1; try { Domain d = getDomain(name); SchedParameter[] pars = d.getSchedulerParameters(); for (SchedParameter pri : pars) { if (pri.field=="weight") res=Integer.parseInt(pri.getValueAsString()); } } catch (Exception e) { log.error(" Error: getting CPU priority of \""+name+"\"." + e.getClass()); e.printStackTrace(); } return res; } public static void main(String args[]) { VirtMonitor virt = new VirtMonitor(); System.out.println(" -> " + virt.getDomains()); System.out.println(virt.getCPUPriority("XenTest")); System.out.println(virt.getCPUCapacity("XenTest")); } Thanks in advance, Marc Gonzalez Mateo marcg(a)ac.upc.edu Universitat Politècnica de Catalunya El 14/12/2009, a las 16:41, Bryan Kearney escribió: Can you send me more info on the use case.. and I will try and recreate it? In the mean time.. tell me if the patched jar file at: http://bkearney.fedorapeople.org/libvirt-0.4.0-PATCH.jar works. You will need to download this and copy it into /usr/share/java/libvirt-0.4.0.jar -- bk On 12/14/2009 04:22 AM, Marc Gonzalez Mateo wrote: OK, let's see if Bryan has an idea/solution about this. Thanks guys! MARC El 11/12/2009, a las 14:29, Daniel Veillard escribió: On Fri, Dec 11, 2009 at 02:01:36PM +0100, Marc Gonzalez Mateo wrote: Hi everyvody, I'm developing a new API based on libvirt. I'm currently stucked using getSchedulerParameters, always is returning a nullpointerexception, no matter which Xen Domain I'm passing to the function. Enclosing both the code and the error console: public int getCPUPriority(String name) { int res=-1; try { Domain d = getDomain(name); SchedParameter[] pars = d.getSchedulerParameters(); Hum, it seems Domain.getSchedulerParameters() does SchedParameter[] returnValue = new SchedParameter[0]; and public static SchedParameter create(virSchedParameter vParam) { SchedParameter returnValue = null; switch (vParam.type) { case (1): and the create method getting there gets a null pointer as the initialization argument, which it first dereference ... so not surprizing looking at the code, maybe Bryan has an idea of what is going on there, I'm a bit lost in this initialization process ... Daniel for (SchedParameter pri : pars) { if (pri.field=="weight") res=Integer.parseInt(pri.getValueAsString()); } } catch (LibvirtException e) { log.error(" Error: getting CPU priority of \""+name+"\"." + e.getClass()); e.printStackTrace(); } return res; } Dec 11, 2009 1:04:18 PM net.emotivecloud.virtmonitor.VirtMonitor getCPUCapacity SEVERE: Error: getting CPU capacity of "XenTest". java.lang.NullPointerException at org.libvirt.SchedParameter.create(Unknown Source) at org.libvirt.Domain.getSchedulerParameters(Unknown Source) at net.emotivecloud.virtmonitor.VirtMonitor.getCPUCapacity(VirtMonitor.java:462) at net.emotivecloud.virtmonitor.VirtMonitor.main(VirtMonitor.java:763) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:616) at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:283) at java.lang.Thread.run(Thread.java:636) Any ideas? Thanks in advance, Marc Gonzalez Mateo -- Libvir-list mailing list Libvir-list(a)redhat.com https://www.redhat.com/mailman/listinfo/libvir-list -- 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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