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[libvirt] [PATCH 00/10 v5] New internal infrastructure for RPC
by Daniel P. Berrange 24 May '11

24 May '11

An update of https://www.redhat.com/archives/libvir-list/2011-May/msg00633.html New in this series: - Nothing. Just rebased to latest GIT. Again, I'm not posting the remote client / daemon conversion patches here, since I want to get this core infrastructure merged real soon and the client/daemon conversion would delay review Full series also available at http://gitorious.org/~berrange/libvirt/staging/commits/rpc

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[libvirt] [PATCH] qemu: Don't change ownership of file when appending to it
by Michal Privoznik 24 May '11

24 May '11

Saving domain to previously created file changes also its ownership. This is certainly not what users want if some conditions are met: it is a regular, local file and dynamic_ownership is off. --- src/qemu/qemu_driver.c | 12 +++++++++++- 1 files changed, 11 insertions(+), 1 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index db299a2..4538cf3 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -1963,6 +1963,8 @@ static int qemudDomainSaveFlag(struct qemud_driver *driver, virDomainPtr dom, bool is_reg = false; unsigned long long offset; int fd = -1; + uid_t uid = getuid(); + gid_t gid = getgid(); memset(&header, 0, sizeof(header)); memcpy(header.magic, QEMUD_SAVE_MAGIC, sizeof(header.magic)); @@ -2013,6 +2015,14 @@ static int qemudDomainSaveFlag(struct qemud_driver *driver, virDomainPtr dom, is_reg = true; } else { is_reg = !!S_ISREG(sb.st_mode); + /* If the path is regular local file which exists + * already and dynamic_ownership is off, we don't + * want to change it's ownership, just append the data */ + if (is_reg && !driver->dynamicOwnership && + virStorageFileIsSharedFS(path) == 0) { + uid=sb.st_uid; + gid=sb.st_gid; + } } offset = sizeof(header) + header.xml_len; @@ -2048,7 +2058,7 @@ static int qemudDomainSaveFlag(struct qemud_driver *driver, virDomainPtr dom, } else { if ((fd = virFileOpenAs(path, O_CREAT|O_TRUNC|O_WRONLY, S_IRUSR|S_IWUSR, - getuid(), getgid(), 0)) < 0) { + uid, gid, 0)) < 0) { /* If we failed as root, and the error was permission-denied (EACCES or EPERM), assume it's on a network-connected share where root access is restricted (eg, root-squashed NFS). If the -- 1.7.5.rc3

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[libvirt] API Proposal: virDomainBlockPull() V5
by Adam Litke 24 May '11

24 May '11

Changes since V4: - Split out BlockPull() and BlockPullAll(). - BlockPull() cursor changed to a virDomainBlockPullInfo for progress reporting only (from in/out to out-only parameter). /* An iterator for initiating and monitoring block pull operations */ typedef unsigned long long virDomainBlockPullCursor; typedef struct _virDomainBlockPullInfo virDomainBlockPullInfo; struct _virDomainBlockPullInfo { /* * The following fields provide an indication of block pull progress. @cur * indicates the current position and will be between 0 and @end. @end is * the final cursor position for this operation and represents completion. * To approximate progress, divide @cur by @end. */ virDomainBlockPullCursor cur; virDomainBlockPullCursor end; }; typedef virDomainBlockPullInfo *virDomainBlockPullInfoPtr; /** * virDomainBlockPull: * @dom: pointer to domain object * @path: Fully-qualified filename of disk * @pos: A pointer to a virDomainBlockPullInfo structure, or NULL * @flags: currently unused, for future extension * * Populate a disk image with data from its backing image. Once all data from * its backing image has been pulled, the disk no longer depends on a backing * image. This function works incrementally, performing a small amount of work * each time it is called. When successful, @pos is updated with the current * progress. * * Returns -1 in case of failure, 0 when successful. */ int virDomainBlockPull(virDomainPtr dom, const char *path, virDomainBlockPullInfoPtr *pos, unsigned int flags); /** * virDomainBlockPullAll: * @dom: pointer to domain object * @path: Fully-qualified filename of disk * @flags: currently unused, for future extension * * Populate a disk image with data from its backing image. Once all data from * its backing image has been pulled, the disk no longer depends on a backing * image. This function pulls data for the entire device in the background. * Progress of the operation can be checked with virDomainGetBlockPullInfo() and * the operation can be aborted with virDomainBlockPullAbort(). When finished, * an asynchronous event is raised to indicate the final status. * * Returns 0 if the operation has started, -1 on failure. */ int virDomainBlockPullAll(virDomainPtr dom, const char *path, unsigned int flags); /** * virDomainBlockPullAbort: * @dom: pointer to domain object * @path: fully-qualified filename of disk * @flags: currently unused, for future extension * * Cancel a pull operation previously started by virDomainBlockPullAll(). * * Returns -1 in case of failure, 0 when successful. */ int virDomainBlockPullAbort(virDomainPtr dom, const char *path, unsigned int flags); /** * virDomainGetBlockPullInfo: * @dom: pointer to domain object * @path: fully-qualified filename of disk * @info: pointer to a virDomainBlockPullInfo structure * @flags: currently unused, for future extension * * Request progress information on a block pull operation that has been started * with virDomainBlockPullAll(). If an operation is active for the given * parameters, @info will be updated with the current progress. * * Returns -1 in case of failure, 0 when successful. */ int virDomainGetBlockPullInfo(virDomainPtr dom, const char *path, virDomainBlockStreamInfoPtr info, unsigned int flags); The following new asynchronous event will be made available for subscription: VIR_DOMAIN_EVENT_ID_BLOCK_PULL = 7, typedef enum { VIR_DOMAIN_BLOCK_PULL_COMPLETED, VIR_DOMAIN_BLOCK_PULL_FAILED, } virConnectDomainEventBlockPullStatus; typedef void (*virConnectDomainEventBlockPullCallback(virConnectPtr conn, virDomainPtr dom, const char *path, int status); Upon receipt of this event and when the status field indicates success, libvirt will revoke access to the backing file which is no longer needed by the domain. NOTE: Qemu will emit an asynchronous event (VIR_DOMAIN_BLOCK_PULL_COMPLETED) after any operation that eliminates the dependency on the backing file. This will allow libvirt to manage backing file security. If the operation failed, an event (VIR_DOMAIN_BLOCK_PULL_FAILED) will indicate that the backing file has not been removed. -- Adam Litke IBM Linux Technology Center

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[libvirt] [PATCH] qemu: fix typo in name - should be VHOST_NET, not VNET_HOST
by Laine Stump 24 May '11

24 May '11

--- configure.ac | 8 +++++--- src/qemu/qemu_capabilities.c | 2 +- src/qemu/qemu_capabilities.h | 2 +- src/qemu/qemu_command.c | 2 +- tests/qemuhelptest.c | 8 ++++---- 5 files changed, 12 insertions(+), 10 deletions(-) diff --git a/configure.ac b/configure.ac index 80a13a1..b6f433b 100644 --- a/configure.ac +++ b/configure.ac @@ -318,14 +318,16 @@ AC_ARG_WITH([init-script], [AC_HELP_STRING([--with-init-script=@<:@redhat|auto|none@:>@], [Style of init script to install @<:@default=auto@:>@])]) if test "x$with_init_script" = "x" || test "x$with_init_script" = "xauto"; then - if test "$cross_compiling" = yes || test ! -f /etc/redhat-release; then + if test "$sysconfdir" != "/etc" || test "$cross_compiling" = yes \ + || test ! -f /etc/redhat-release; then with_init_script=none else with_init_script=redhat fi fi -AM_CONDITIONAL([LIBVIRT_INIT_SCRIPT_RED_HAT], test x$with_init_script = xredhat) -AC_MSG_RESULT($with_init_script) +AM_CONDITIONAL([LIBVIRT_INIT_SCRIPT_RED_HAT], + [test x$with_init_script = xredhat]) +AC_MSG_RESULT([$with_init_script]) dnl RHEL-5 has a peculiar version of Xen, which requires some special casing AC_ARG_WITH([rhel5-api], diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 71a54a5..8289141 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -983,7 +983,7 @@ qemuCapsComputeCmdFlags(const char *help, qemuCapsSet(flags, QEMU_CAPS_VNET_HDR); if (strstr(help, ",vhost=")) { - qemuCapsSet(flags, QEMU_CAPS_VNET_HOST); + qemuCapsSet(flags, QEMU_CAPS_VHOST_NET); } /* diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h index ab47f22..4c1ad63 100644 --- a/src/qemu/qemu_capabilities.h +++ b/src/qemu/qemu_capabilities.h @@ -66,7 +66,7 @@ enum qemuCapsFlags { QEMU_CAPS_SMP_TOPOLOGY = 28, /* Is sockets=s,cores=c,threads=t available for -smp? */ QEMU_CAPS_NETDEV = 29, /* The -netdev flag & netdev_add/remove monitor commands */ QEMU_CAPS_RTC = 30, /* The -rtc flag for clock options */ - QEMU_CAPS_VNET_HOST = 31, /* vnet-host support is available in qemu */ + QEMU_CAPS_VHOST_NET = 31, /* vhost-net support is available in qemu */ QEMU_CAPS_RTC_TD_HACK = 32, /* -rtc-td-hack available */ QEMU_CAPS_NO_HPET = 33, /* -no-hpet flag is supported */ QEMU_CAPS_NO_KVM_PIT = 34, /* -no-kvm-pit-reinjection supported */ diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 2828823..a4a7e8e 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -320,7 +320,7 @@ qemuOpenVhostNet(virDomainDefPtr def, /* If qemu doesn't support vhost-net mode (including the -netdev command * option), don't try to open the device. */ - if (!(qemuCapsGet(qemuCaps, QEMU_CAPS_VNET_HOST) && + if (!(qemuCapsGet(qemuCaps, QEMU_CAPS_VHOST_NET) && qemuCapsGet(qemuCaps, QEMU_CAPS_NETDEV) && qemuCapsGet(qemuCaps, QEMU_CAPS_DEVICE))) { if (net->driver.virtio.name == VIR_DOMAIN_NET_BACKEND_TYPE_VHOST) { diff --git a/tests/qemuhelptest.c b/tests/qemuhelptest.c index 2522396..71780d8 100644 --- a/tests/qemuhelptest.c +++ b/tests/qemuhelptest.c @@ -333,7 +333,7 @@ mymain(void) QEMU_CAPS_DEVICE, QEMU_CAPS_SMP_TOPOLOGY, QEMU_CAPS_RTC, - QEMU_CAPS_VNET_HOST, + QEMU_CAPS_VHOST_NET, QEMU_CAPS_NO_KVM_PIT, QEMU_CAPS_TDF, QEMU_CAPS_PCI_CONFIGFD, @@ -374,7 +374,7 @@ mymain(void) QEMU_CAPS_DEVICE, QEMU_CAPS_SMP_TOPOLOGY, QEMU_CAPS_RTC, - QEMU_CAPS_VNET_HOST, + QEMU_CAPS_VHOST_NET, QEMU_CAPS_NO_HPET, QEMU_CAPS_NO_KVM_PIT, QEMU_CAPS_TDF, @@ -415,7 +415,7 @@ mymain(void) QEMU_CAPS_SMP_TOPOLOGY, QEMU_CAPS_NETDEV, QEMU_CAPS_RTC, - QEMU_CAPS_VNET_HOST, + QEMU_CAPS_VHOST_NET, QEMU_CAPS_NO_HPET, QEMU_CAPS_NO_KVM_PIT, QEMU_CAPS_TDF, @@ -456,7 +456,7 @@ mymain(void) QEMU_CAPS_DEVICE, QEMU_CAPS_SMP_TOPOLOGY, QEMU_CAPS_RTC, - QEMU_CAPS_VNET_HOST, + QEMU_CAPS_VHOST_NET, QEMU_CAPS_NO_KVM_PIT, QEMU_CAPS_TDF, QEMU_CAPS_PCI_CONFIGFD, -- 1.7.3.4

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[libvirt] API Proposal: virDomainBlockPull() (Block device streaming) V4
by Adam Litke 24 May '11

24 May '11

Here is version 4 of the BlockStream API (now called BlockPull). Hopefully this version addresses all remaining concerns and I can begin to work on the code. Does everyone approve of the new name 'virDomainBlockPull'? Changes since V3: - Renamed the API to 'Block Pull' to emphasize the effect of the API over its method of operation. - Changed virDomainGetBlockPullInfo() to accept a path argument and to return information about that path alone. - Added a new virDomainEvent to report final status when using CONTINUOUS mode. /* * Block Pull API */ typedef enum { /* * If set, virDomainBlockPull() will operate on the entire device in the * background. The status can be checked and the operation aborted by * using the functions virDomainBlockPullInfo() and * virDomainBlockPullAbort(). */ VIR_DOMAIN_BLOCK_PULL_CONTINUOUS = 1, } virDomainBlockPullFlags; /* An iterator for initiating and monitoring block pull operations */ typedef unsigned long long virDomainBlockPullCursor; typedef struct _virDomainBlockPullInfo virDomainBlockPullInfo; struct _virDomainBlockPullInfo { /* * The following fields provide an indication of block pull progress. @cur * indicates the current position and will be between 0 and @end. @end is * the final cursor position for this operation and represents completion. * To approximate progress, divide @cur by @end. */ virDomainBlockPullCursor cur; virDomainBlockPullCursor end; }; typedef virDomainBlockPullInfo *virDomainBlockPullInfoPtr; /** * virDomainBlockPull: * @dom: pointer to domain object * @path: Fully-qualified filename of disk * @cursor: pointer to a virDomainBlockPullCursor, or NULL * @flags: One of virDomainBlockPullFlags, or zero * * Populate a disk image with data from its backing image. Once all data from * its backing image has been pulled, the disk no longer depends on a backing * image. * * If VIR_DOMAIN_BLOCK_PULL_CONTINUOUS is specified, the entire device will be * streamed in the background. Otherwise, the value stored in @cursor will be * used to stream an increment. * * Returns -1 in case of failure, 0 when successful. On success and when @flags * does not contain VIR_DOMAIN_BLOCK_PULL_CONTINUOUS, the iterator @cursor will * be updated to the proper value for use in a subsequent call. */ int virDomainBlockPull(virDomainPtr dom, const char *path, virDomainBlockPullCursor *cursor, unsigned int flags); /** * virDomainBlockPullAbort: * @dom: pointer to domain object * @path: fully-qualified filename of disk * @flags: currently unused, for future extension * * Cancel a pull operation that has been previously started by a call to * virDomainBlockPull() with the VIR_DOMAIN_BLOCK_PULL_CONTINUOUS flag. * * Returns -1 in case of failure, 0 when successful. */ int virDomainBlockPullAbort(virDomainPtr dom, const char *path, unsigned int flags); /** * virDomainGetBlockPullInfo: * @dom: pointer to domain object * @path: fully-qualified filename of disk * @info: pointer to a virDomainBlockPullInfo structure * @flags: currently unused, for future extension * * Request progress information on a block pull operation that has been started * with the VIR_DOMAIN_BLOCK_PULL_CONTINUOUS flag set. If an operation is * active for the given parameters, @info will be updated with the current * progress. * * Returns -1 in case of failure, 0 when successful. */ int virDomainGetBlockPullInfo(virDomainPtr dom, const char *path, virDomainBlockStreamInfoPtr info, unsigned int flags); The following new asynchronous event will be made available for subscription: VIR_DOMAIN_EVENT_ID_BLOCK_PULL = 7, typedef enum { VIR_DOMAIN_BLOCK_PULL_COMPLETED, VIR_DOMAIN_BLOCK_PULL_FAILED, } virConnectDomainEventBlockPullStatus; typedef void (*virConnectDomainEventBlockPullCallback(virConnectPtr conn, virDomainPtr dom, const char *path, int status); Upon receipt of this event and when the status field indicates success, libvirt will revoke access to the backing file which is no longer needed by the domain. NOTE: Qemu will emit an asynchronous event (VIR_DOMAIN_BLOCK_PULL_COMPLETED) after any operation that eliminates the dependency on the backing file. This could be a virDomainBlockPull() without VIR_DOMAIN_BLOCK_PULL_CONTINUOUS and will allow libvirt to manage backing file security regardless of the pull mode used. -- Adam Litke IBM Linux Technology Center

3 8

[libvirt] Git snapshot tar not working?
by Neil Wilson 24 May '11

24 May '11

Hi, Has the git snapshot tar service stopped working? The file is dated 6th May and is very out of date compared to git head. Rgs Neil

2 2

[libvirt] [PATCH] Don't restore labels on network shares
by Christian Brunner 24 May '11

24 May '11

Restoring security labels on network shares doesn't work and will cause an error. Therefore it should be skipped. Signed-off-by: Christian Brunner <chb(a)muc.de> --- src/security/security_dac.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/src/security/security_dac.c b/src/security/security_dac.c index fba2d1d..02c0bc1 100644 --- a/src/security/security_dac.c +++ b/src/security/security_dac.c @@ -213,6 +213,13 @@ virSecurityDACRestoreSecurityImageLabelInt(virSecurityManagerPtr mgr, if (!disk->src) return 0; + /* Don't restore labels on network shares */ + if (disk->type == VIR_DOMAIN_DISK_TYPE_NETWORK) { + VIR_DEBUG("Skipping image label restore on %s because FS is of type network", + disk->src); + return 0; + } + /* If we have a shared FS & doing migrated, we must not * change ownership, because that kills access on the * destination host which is sub-optimal for the guest -- 1.7.1

2 1

[libvirt] [PATCH] python: Don't free must-not-free variables
by Michal Privoznik 24 May '11

24 May '11

py_str() function call PyString_AsString(). As written in documentation, the caller must not free the returned value, because it points to some internal structures. --- python/libvirt-override.c | 15 ++++++--------- 1 files changed, 6 insertions(+), 9 deletions(-) diff --git a/python/libvirt-override.c b/python/libvirt-override.c index a151e78..7998723 100644 --- a/python/libvirt-override.c +++ b/python/libvirt-override.c @@ -35,6 +35,8 @@ extern void initcygvirtmod(void); #define VIR_PY_INT_FAIL (libvirt_intWrap(-1)) #define VIR_PY_INT_SUCCESS (libvirt_intWrap(0)) +/* We don't want to free() returned value, as written in doc + * to PyString_AsString. */ static char *py_str(PyObject *obj) { PyObject *str = PyObject_Str(obj); @@ -2660,7 +2662,6 @@ libvirt_virEventAddHandleFunc (int fd, char *name = py_str(python_cb); printf("%s: %s is not callable\n", __FUNCTION__, name ? name : "libvirt.eventInvokeHandleCallback"); - free(name); #endif goto cleanup; } @@ -2805,7 +2806,6 @@ libvirt_virEventAddTimeoutFunc(int timeout, char *name = py_str(python_cb); printf("%s: %s is not callable\n", __FUNCTION__, name ? name : "libvirt.eventInvokeTimeoutCallback"); - free(name); #endif goto cleanup; } @@ -2919,17 +2919,11 @@ libvirt_virEventRegisterImpl(ATTRIBUTE_UNUSED PyObject * self, { /* Unref the previously-registered impl (if any) */ Py_XDECREF(addHandleObj); - free(addHandleName); Py_XDECREF(updateHandleObj); - free(updateHandleName); Py_XDECREF(removeHandleObj); - free(removeHandleName); Py_XDECREF(addTimeoutObj); - free(addTimeoutName); Py_XDECREF(updateTimeoutObj); - free(updateTimeoutName); Py_XDECREF(removeTimeoutObj); - free(removeTimeoutName); /* Parse and check arguments */ if (!PyArg_ParseTuple(args, (char *) "OOOOOO:virEventRegisterImpl", @@ -2944,7 +2938,10 @@ libvirt_virEventRegisterImpl(ATTRIBUTE_UNUSED PyObject * self, !PyCallable_Check(removeTimeoutObj)) return VIR_PY_INT_FAIL; - /* Get argument string representations (for error reporting) */ + /* Get argument string representations (for error reporting). + * py_str calls PyString_AsString() which returns pointer to: + * 'internal buffer of string, not a copy.' and 'It must not be + * deallocated' (pyhton c-api documentation) */ addHandleName = py_str(addHandleObj); updateHandleName = py_str(updateHandleObj); removeHandleName = py_str(removeHandleObj); -- 1.7.5.rc3

2 1

[libvirt] [PATCH] storage: Add comment to picking return value of qemu-img
by Michal Privoznik 24 May '11

24 May '11

Commit d7b2679253504d6defa9fc7159b572cfd6a25a95 introduced a return value picking of qemu-img on '-h', but without any comment. --- src/storage/storage_backend.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c index c8e19c8..b423d11 100644 --- a/src/storage/storage_backend.c +++ b/src/storage/storage_backend.c @@ -628,6 +628,9 @@ static int virStorageBackendQEMUImgBackingFormat(const char *qemuimg) virCommandSetOutputBuffer(cmd, &help); virCommandClearCaps(cmd); + /* qemuimg doesn't return zero exit status on -h, + * therefore we need to provide pointer for storing + * exit status, although we don't parse it any later */ if (virCommandRun(cmd, &exitstatus) < 0) goto cleanup; -- 1.7.5.rc3

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[libvirt] [PATCH 0/3] add support for changing blkio parameters for inactive domains
by Hu Tao 24 May '11

24 May '11

This series enables user to change blkio parameters for inactive domains from virsh command line. Hu Tao (3): Add new parameters for blkiotune update qemuDomainGetBlkioParameters to use flags Update qemuDomainSetBlkioParameters to use flags include/libvirt/libvirt.h.in | 6 + src/qemu/qemu_driver.c | 250 +++++++++++++++++++++++++++++------------- tools/virsh.c | 26 ++++- tools/virsh.pod | 6 +- 4 files changed, 210 insertions(+), 78 deletions(-) -- 1.7.3.1

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