4:26 a.m.
changes in v3:
- rename the XML attribute to appid as technically what user
provides is not VMID, that is created by kernel
changes in v2:
- refactor of resource parsing and formatting code
- use <fibrechannel vmid=''/> element
- use stat() directly
- report only single system error
Pavel Hrdina (5):
vircgroup: introduce virCgroupGetInode function
conf: refactor virDomainResourceDefParse
conf: refactor virDomainResourceDefFormat
conf: introduce support for Fibre Channel VMID
qemu: implement support for Fibre Channel VMID
docs/formatdomain.rst | 21 ++++++++++
docs/schemas/domaincommon.rng | 21 ++++++++--
src/conf/domain_conf.c | 42 +++++++++++--------
src/conf/domain_conf.h | 1 +
src/conf/domain_validate.c | 19 +++++++++
src/libvirt_private.syms | 1 +
src/qemu/qemu_cgroup.c | 27 ++++++++++++
src/util/vircgroup.c | 31 ++++++++++++++
src/util/vircgroup.h | 2 +
.../fibrechannel-appid.xml | 21 ++++++++++
tests/genericxml2xmltest.c | 2 +
11 files changed, 167 insertions(+), 21 deletions(-)
create mode 100644 tests/genericxml2xmlindata/fibrechannel-appid.xml
--
2.31.1
4:26 a.m.
New subject: [libvirt PATCH v3 1/5] vircgroup: introduce virCgroupGetInode function
For new feature Fibre Channel VMID we will need to get inode of the
VM root cgroup as it is used in the new kernel API together with VMID.
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
---
src/libvirt_private.syms | 1 +
src/util/vircgroup.c | 31 +++++++++++++++++++++++++++++++
src/util/vircgroup.h | 2 ++
3 files changed, 34 insertions(+)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 51a400ba59..fcb02c21b1 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1922,6 +1922,7 @@ virCgroupGetCpuShares;
virCgroupGetDevicePermsString;
virCgroupGetDomainTotalCpuStats;
virCgroupGetFreezerState;
+virCgroupGetInode;
virCgroupGetMemoryHardLimit;
virCgroupGetMemorySoftLimit;
virCgroupGetMemoryStat;
diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index 1b3b28342e..4c9445340e 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -3973,3 +3973,34 @@ virCgroupGetCpuPeriodQuota(virCgroup *cgroup, unsigned long long
*period,
return 0;
}
+
+
+/**
+ * virCgroupGetInode:
+ *
+ * @cgroup: the cgroup to get inode for
+ *
+ * Get the @cgroup inode and return its value to the caller.
+ *
+ * Returns inode on success, -1 on error with error message reported.
+ */
+int
+virCgroupGetInode(virCgroup *cgroup)
+{
+ struct stat st;
+ int controller = virCgroupGetAnyController(cgroup);
+ g_autofree char *path = NULL;
+
+ if (controller < 0)
+ return -1;
+
+ if (virCgroupPathOfController(cgroup, controller, "", &path) < 0)
+ return -1;
+
+ if (stat(path, &st) < 0) {
+ virReportSystemError(errno, _("failed to get stat for '%s'"),
path);
+ return -1;
+ }
+
+ return st.st_ino;
+}
diff --git a/src/util/vircgroup.h b/src/util/vircgroup.h
index 8002cac570..690f09465c 100644
--- a/src/util/vircgroup.h
+++ b/src/util/vircgroup.h
@@ -283,3 +283,5 @@ int virCgroupSetOwner(virCgroup *cgroup,
int virCgroupHasEmptyTasks(virCgroup *cgroup, int controller);
bool virCgroupControllerAvailable(int controller);
+
+int virCgroupGetInode(virCgroup *cgroup);
--
2.31.1
4:26 a.m.
New subject: [libvirt PATCH v3 2/5] conf: refactor virDomainResourceDefParse
There is no need to error out for empty <partition></partition> element
as we can just simply ignore it. This allows to simplify the function
and prepare it for new sub-elements of <resource>.
It makes the <partition> element optional so we need to reflect the
change in schema as well.
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
---
docs/schemas/domaincommon.rng | 8 +++++---
src/conf/domain_conf.c | 18 +++++++-----------
2 files changed, 12 insertions(+), 14 deletions(-)
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 2442078969..9b669d9de5 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -1172,9 +1172,11 @@
<define name="respartition">
<element name="resource">
- <element name="partition">
- <ref name="absFilePath"/>
- </element>
+ <optional>
+ <element name="partition">
+ <ref name="absFilePath"/>
+ </element>
+ </optional>
</element>
</define>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index e9bdbbfd74..7dff6c8beb 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -17284,23 +17284,19 @@ virDomainResourceDefParse(xmlNodePtr node,
{
VIR_XPATH_NODE_AUTORESTORE(ctxt)
virDomainResourceDef *def = NULL;
+ char *partition = NULL;
ctxt->node = node;
+ partition = virXPathString("string(./partition)", ctxt);
+
+ if (!partition)
+ return NULL;
+
def = g_new0(virDomainResourceDef, 1);
-
- /* Find out what type of virtualization to use */
- if (!(def->partition = virXPathString("string(./partition)", ctxt))) {
- virReportError(VIR_ERR_INTERNAL_ERROR,
- "%s", _("missing resource partition
attribute"));
- goto error;
- }
+ def->partition = partition;
return def;
-
- error:
- virDomainResourceDefFree(def);
- return NULL;
}
--
2.31.1
4:26 a.m.
New subject: [libvirt PATCH v3 3/5] conf: refactor virDomainResourceDefFormat
Prepare the function for additional sub-elements where all of the
sub-elements are optional.
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
---
src/conf/domain_conf.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 7dff6c8beb..571650bfd3 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -26761,11 +26761,15 @@ static void
virDomainResourceDefFormat(virBuffer *buf,
virDomainResourceDef *def)
{
- virBufferAddLit(buf, "<resource>\n");
- virBufferAdjustIndent(buf, 2);
- virBufferEscapeString(buf, "<partition>%s</partition>\n",
def->partition);
- virBufferAdjustIndent(buf, -2);
- virBufferAddLit(buf, "</resource>\n");
+ g_auto(virBuffer) childBuf = VIR_BUFFER_INIT_CHILD(buf);
+
+ if (!def)
+ return;
+
+ if (def->partition)
+ virBufferEscapeString(&childBuf,
"<partition>%s</partition>\n", def->partition);
+
+ virXMLFormatElement(buf, "resource", NULL, &childBuf);
}
@@ -27918,8 +27922,7 @@ virDomainDefFormatInternalSetRootName(virDomainDef *def,
if (virDomainNumatuneFormatXML(buf, def->numa) < 0)
return -1;
- if (def->resource)
- virDomainResourceDefFormat(buf, def->resource);
+ virDomainResourceDefFormat(buf, def->resource);
for (i = 0; i < def->nsysinfo; i++) {
if (virSysinfoFormat(buf, def->sysinfo[i]) < 0)
--
2.31.1
4:26 a.m.
New subject: [libvirt PATCH v3 4/5] conf: introduce support for Fibre Channel VMID
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
---
docs/formatdomain.rst | 21 +++++++++++++++++++
docs/schemas/domaincommon.rng | 13 ++++++++++++
src/conf/domain_conf.c | 9 +++++++-
src/conf/domain_conf.h | 1 +
src/conf/domain_validate.c | 19 +++++++++++++++++
.../fibrechannel-appid.xml | 21 +++++++++++++++++++
tests/genericxml2xmltest.c | 2 ++
7 files changed, 85 insertions(+), 1 deletion(-)
create mode 100644 tests/genericxml2xmlindata/fibrechannel-appid.xml
diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst
index 61ccd8895a..881a75df87 100644
--- a/docs/formatdomain.rst
+++ b/docs/formatdomain.rst
@@ -1221,6 +1221,27 @@ Resource partitions are currently supported by the QEMU and LXC
drivers, which
map partition paths to cgroups directories, in all mounted controllers.
:since:`Since 1.0.5`
+Fibre Channel VMID
+-------------------
+
+The FC SAN can provide various QOS levels, access control depending on the
+VMID. Also it can collect telemetry data at per-VM level which can be used
+to enhance the IO performance of the VM. This can be configured by using
+the ``appid`` attribute of ``fibrechannel`` element. The attribute contains
+single string (max 128 bytes) and it is used by kernel to create VMID.
+
+::
+
+ ...
+ <resource>
+ <fibrechannel appid='userProvidedID'/>
+ </resource>
+ ...
+
+Using this feature requires Fibre Channel capable HW, kernel compiled with
+option ``CONFIG_BLK_CGROUP_FC_APPID`` and ``nvme_fc`` kernel module loaded.
+:since:`Since 7.7.0`
+
:anchor:`<a id="elementsCPU"/>`
CPU model and topology
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 9b669d9de5..b32fb8c04c 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -576,6 +576,16 @@
</element>
</define>
+ <define name="fibrechannel">
+ <element name="fibrechannel">
+ <attribute name="appid">
+ <data type="string">
+ <param name="pattern">.{1,128}</param>
+ </data>
+ </attribute>
+ </element>
+ </define>
+
<!--
The Identifiers can be:
- an optional id attribute with a number on the domain element
@@ -1177,6 +1187,9 @@
<ref name="absFilePath"/>
</element>
</optional>
+ <optional>
+ <ref name="fibrechannel"/>
+ </optional>
</element>
</define>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 571650bfd3..926f831073 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -3446,6 +3446,7 @@ virDomainResourceDefFree(virDomainResourceDef *resource)
return;
g_free(resource->partition);
+ g_free(resource->appid);
g_free(resource);
}
@@ -17285,16 +17286,19 @@ virDomainResourceDefParse(xmlNodePtr node,
VIR_XPATH_NODE_AUTORESTORE(ctxt)
virDomainResourceDef *def = NULL;
char *partition = NULL;
+ char *appid = NULL;
ctxt->node = node;
partition = virXPathString("string(./partition)", ctxt);
+ appid = virXPathString("string(./fibrechannel/@appid)", ctxt);
- if (!partition)
+ if (!partition && !appid)
return NULL;
def = g_new0(virDomainResourceDef, 1);
def->partition = partition;
+ def->appid = appid;
return def;
}
@@ -26769,6 +26773,9 @@ virDomainResourceDefFormat(virBuffer *buf,
if (def->partition)
virBufferEscapeString(&childBuf,
"<partition>%s</partition>\n", def->partition);
+ if (def->appid)
+ virBufferEscapeString(&childBuf, "<fibrechannel
appid='%s'/>\n", def->appid);
+
virXMLFormatElement(buf, "resource", NULL, &childBuf);
}
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 748b1d5f30..c7e6df7981 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -2538,6 +2538,7 @@ void virBlkioDeviceArrayClear(virBlkioDevice *deviceWeights,
struct _virDomainResourceDef {
char *partition;
+ char *appid;
};
struct _virDomainHugePage {
diff --git a/src/conf/domain_validate.c b/src/conf/domain_validate.c
index a9e4519b1a..48f03dfdba 100644
--- a/src/conf/domain_validate.c
+++ b/src/conf/domain_validate.c
@@ -55,6 +55,22 @@ virDomainDefBootValidate(const virDomainDef *def)
}
+static int
+virDomainDefResourceValidate(const virDomainDef *def)
+{
+ if (!def->resource)
+ return 0;
+
+ if (def->resource->appid && strlen(def->resource->appid) >
128) {
+ virReportError(VIR_ERR_INVALID_ARG, "%s",
+ _("Fibre Channel 'appid' cannot be longer then 128
characters"));
+ return -1;
+ }
+
+ return 0;
+}
+
+
static int
virDomainDefVideoValidate(const virDomainDef *def)
{
@@ -1538,6 +1554,9 @@ static int
virDomainDefValidateInternal(const virDomainDef *def,
virDomainXMLOption *xmlopt)
{
+ if (virDomainDefResourceValidate(def) < 0)
+ return -1;
+
if (virDomainDefDuplicateDiskInfoValidate(def) < 0)
return -1;
diff --git a/tests/genericxml2xmlindata/fibrechannel-appid.xml
b/tests/genericxml2xmlindata/fibrechannel-appid.xml
new file mode 100644
index 0000000000..ad7df4d4ac
--- /dev/null
+++ b/tests/genericxml2xmlindata/fibrechannel-appid.xml
@@ -0,0 +1,21 @@
+<domain type='qemu'>
+ <name>QEMUGuest1</name>
+ <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+ <memory unit='KiB'>219100</memory>
+ <currentMemory unit='KiB'>219100</currentMemory>
+ <vcpu placement='static'>4</vcpu>
+ <resource>
+ <fibrechannel appid='someapp:c7a5fdbd-edaf-9455-926a-d65c16db1809'/>
+ </resource>
+ <os>
+ <type arch='x86_64' machine='q35'>hvm</type>
+ <boot dev='hd'/>
+ </os>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>destroy</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu-system-x86_64</emulator>
+ </devices>
+</domain>
diff --git a/tests/genericxml2xmltest.c b/tests/genericxml2xmltest.c
index 54622ea831..39fd6d403a 100644
--- a/tests/genericxml2xmltest.c
+++ b/tests/genericxml2xmltest.c
@@ -225,6 +225,8 @@ mymain(void)
DO_TEST_DIFFERENT("cputune");
DO_TEST("device-backenddomain");
+ DO_TEST("fibrechannel-appid");
+
#define DO_TEST_BACKUP_FULL(name, intrnl) \
do { \
const struct testCompareBackupXMLData data = { .testname = name, \
--
2.31.1
4:59 a.m.
New subject: [libvirt PATCH v3 4/5] conf: introduce support for Fibre Channel VMID
On Tue, Aug 17, 2021 at 11:26:41AM +0200, Pavel Hrdina wrote:
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
---
docs/formatdomain.rst | 21 +++++++++++++++++++
docs/schemas/domaincommon.rng | 13 ++++++++++++
src/conf/domain_conf.c | 9 +++++++-
src/conf/domain_conf.h | 1 +
src/conf/domain_validate.c | 19 +++++++++++++++++
.../fibrechannel-appid.xml | 21 +++++++++++++++++++
tests/genericxml2xmltest.c | 2 ++
7 files changed, 85 insertions(+), 1 deletion(-)
create mode 100644 tests/genericxml2xmlindata/fibrechannel-appid.xml
diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst
index 61ccd8895a..881a75df87 100644
--- a/docs/formatdomain.rst
+++ b/docs/formatdomain.rst
@@ -1221,6 +1221,27 @@ Resource partitions are currently supported by the QEMU and LXC
drivers, which
map partition paths to cgroups directories, in all mounted controllers.
:since:`Since 1.0.5`
+Fibre Channel VMID
+-------------------
+
+The FC SAN can provide various QOS levels, access control depending on the
"QoS levels and access control"
+VMID. Also it can collect telemetry data at per-VM level which can be
used
"It can also collect" reads better
+to enhance the IO performance of the VM. This can be configured by
using
+the ``appid`` attribute of ``fibrechannel`` element. The attribute contains
+single string (max 128 bytes) and it is used by kernel to create VMID.
+
+::
+
+ ...
+ <resource>
+ <fibrechannel appid='userProvidedID'/>
+ </resource>
+ ...
+
+Using this feature requires Fibre Channel capable HW, kernel compiled with
+option ``CONFIG_BLK_CGROUP_FC_APPID`` and ``nvme_fc`` kernel module loaded.
+:since:`Since 7.7.0`
+
:anchor:`<a id="elementsCPU"/>`
CPU model and topology
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 9b669d9de5..b32fb8c04c 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -576,6 +576,16 @@
</element>
</define>
+ <define name="fibrechannel">
+ <element name="fibrechannel">
+ <attribute name="appid">
+ <data type="string">
+ <param name="pattern">.{1,128}</param>
I can imagine this biting us in the future, wouldn't it be safer to
limit the character set of the string? From the kernel code it looks
like it handles any bytes and pads them to 128 unconditionally, but I
still feel uneasy about not limiting it to at least printable characters
(like we do with e.g. disk vendor and product strings).
5:09 a.m.
New subject: [libvirt PATCH v3 4/5] conf: introduce support for Fibre Channel VMID
On Tue, Aug 17, 2021 at 11:59:56AM +0200, Martin Kletzander wrote:
On Tue, Aug 17, 2021 at 11:26:41AM +0200, Pavel Hrdina wrote:
> Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
> ---
> docs/formatdomain.rst | 21 +++++++++++++++++++
> docs/schemas/domaincommon.rng | 13 ++++++++++++
> src/conf/domain_conf.c | 9 +++++++-
> src/conf/domain_conf.h | 1 +
> src/conf/domain_validate.c | 19 +++++++++++++++++
> .../fibrechannel-appid.xml | 21 +++++++++++++++++++
> tests/genericxml2xmltest.c | 2 ++
> 7 files changed, 85 insertions(+), 1 deletion(-)
> create mode 100644 tests/genericxml2xmlindata/fibrechannel-appid.xml
>
> diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst
> index 61ccd8895a..881a75df87 100644
> --- a/docs/formatdomain.rst
> +++ b/docs/formatdomain.rst
> @@ -1221,6 +1221,27 @@ Resource partitions are currently supported by the QEMU and
LXC drivers, which
> map partition paths to cgroups directories, in all mounted controllers.
> :since:`Since 1.0.5`
>
> +Fibre Channel VMID
> +-------------------
> +
> +The FC SAN can provide various QOS levels, access control depending on the
"QoS levels and access control"
> +VMID. Also it can collect telemetry data at per-VM level which can be used
"It can also collect" reads better
> +to enhance the IO performance of the VM. This can be configured by using
> +the ``appid`` attribute of ``fibrechannel`` element. The attribute contains
> +single string (max 128 bytes) and it is used by kernel to create VMID.
> +
> +::
> +
> + ...
> + <resource>
> + <fibrechannel appid='userProvidedID'/>
> + </resource>
> + ...
> +
> +Using this feature requires Fibre Channel capable HW, kernel compiled with
> +option ``CONFIG_BLK_CGROUP_FC_APPID`` and ``nvme_fc`` kernel module loaded.
> +:since:`Since 7.7.0`
> +
> :anchor:`<a id="elementsCPU"/>`
>
> CPU model and topology
> diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
> index 9b669d9de5..b32fb8c04c 100644
> --- a/docs/schemas/domaincommon.rng
> +++ b/docs/schemas/domaincommon.rng
> @@ -576,6 +576,16 @@
> </element>
> </define>
>
> + <define name="fibrechannel">
> + <element name="fibrechannel">
> + <attribute name="appid">
> + <data type="string">
> + <param name="pattern">.{1,128}</param>
I can imagine this biting us in the future, wouldn't it be safer to
limit the character set of the string? From the kernel code it looks
like it handles any bytes and pads them to 128 unconditionally, but I
still feel uneasy about not limiting it to at least printable characters
(like we do with e.g. disk vendor and product strings).
Yeah, I was not completely sure about this as well. Sounds reasonable to
limit it, we can always add more characters if there is a need to do it.
I'll fix it, thanks!
4:26 a.m.
New subject: [libvirt PATCH v3 5/5] qemu: implement support for Fibre Channel VMID
Based on kernel commit messages the interface is
/sys/class/fc/fc_udev_device/appid_store
where we need to write the following string "$INODE:$APPID".
$INODE is the VM root cgroup inode in hexadecimal and $APPID is user
provided string that will be attached to each FC frame for the VM
within the cgroup identified by inode and has limit 128 bytes.
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
---
src/qemu/qemu_cgroup.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/src/qemu/qemu_cgroup.c b/src/qemu/qemu_cgroup.c
index f2d99abcfa..cb83cc8e3e 100644
--- a/src/qemu/qemu_cgroup.c
+++ b/src/qemu/qemu_cgroup.c
@@ -904,6 +904,30 @@ qemuSetupCpuCgroup(virDomainObj *vm)
}
+static int
+qemuSetupCgroupAppid(virDomainObj *vm)
+{
+ qemuDomainObjPrivate *priv = vm->privateData;
+ int inode = virCgroupGetInode(priv->cgroup);
+ const char *path = "/sys/class/fc/fc_udev_device/appid_store";
+ g_autofree char *appid = NULL;
+ virDomainResourceDef *resource = vm->def->resource;
+
+ if (!resource || !resource->appid)
+ return 0;
+
+ appid = g_strdup_printf("%X:%s", inode, resource->appid);
+
+ if (virFileWriteStr(path, appid, 0) < 0) {
+ virReportSystemError(errno,
+ _("Unable to write '%s' to '%s'"),
appid, path);
+ return -1;
+ }
+
+ return 0;
+}
+
+
static int
qemuInitCgroup(virDomainObj *vm,
size_t nnicindexes,
@@ -1096,6 +1120,9 @@ qemuSetupCgroup(virDomainObj *vm,
if (qemuSetupCpusetCgroup(vm) < 0)
return -1;
+ if (qemuSetupCgroupAppid(vm) < 0)
+ return -1;
+
return 0;
}
--
2.31.1
5:06 a.m.
New subject: [libvirt PATCH v3 5/5] qemu: implement support for Fibre Channel VMID
On Tue, Aug 17, 2021 at 11:26:42AM +0200, Pavel Hrdina wrote:
Based on kernel commit messages the interface is
/sys/class/fc/fc_udev_device/appid_store
where we need to write the following string "$INODE:$APPID".
$INODE is the VM root cgroup inode in hexadecimal and $APPID is user
provided string that will be attached to each FC frame for the VM
within the cgroup identified by inode and has limit 128 bytes.
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
---
src/qemu/qemu_cgroup.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/src/qemu/qemu_cgroup.c b/src/qemu/qemu_cgroup.c
index f2d99abcfa..cb83cc8e3e 100644
--- a/src/qemu/qemu_cgroup.c
+++ b/src/qemu/qemu_cgroup.c
@@ -904,6 +904,30 @@ qemuSetupCpuCgroup(virDomainObj *vm)
}
+static int
+qemuSetupCgroupAppid(virDomainObj *vm)
+{
+ qemuDomainObjPrivate *priv = vm->privateData;
+ int inode = virCgroupGetInode(priv->cgroup);
You are not checking if this resulted in an error.
5:12 a.m.
New subject: [libvirt PATCH v3 5/5] qemu: implement support for Fibre Channel VMID
On Tue, Aug 17, 2021 at 12:06:11PM +0200, Martin Kletzander wrote:
On Tue, Aug 17, 2021 at 11:26:42AM +0200, Pavel Hrdina wrote:
> Based on kernel commit messages the interface is
>
> /sys/class/fc/fc_udev_device/appid_store
>
> where we need to write the following string "$INODE:$APPID".
>
> $INODE is the VM root cgroup inode in hexadecimal and $APPID is user
> provided string that will be attached to each FC frame for the VM
> within the cgroup identified by inode and has limit 128 bytes.
>
> Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
> ---
> src/qemu/qemu_cgroup.c | 27 +++++++++++++++++++++++++++
> 1 file changed, 27 insertions(+)
>
> diff --git a/src/qemu/qemu_cgroup.c b/src/qemu/qemu_cgroup.c
> index f2d99abcfa..cb83cc8e3e 100644
> --- a/src/qemu/qemu_cgroup.c
> +++ b/src/qemu/qemu_cgroup.c
> @@ -904,6 +904,30 @@ qemuSetupCpuCgroup(virDomainObj *vm)
> }
>
>
> +static int
> +qemuSetupCgroupAppid(virDomainObj *vm)
> +{
> + qemuDomainObjPrivate *priv = vm->privateData;
> + int inode = virCgroupGetInode(priv->cgroup);
You are not checking if this resulted in an error.
Nice catch, somehow missed that! Will fix, thanks.
5:07 a.m.
On Tue, Aug 17, 2021 at 11:26:37AM +0200, Pavel Hrdina wrote:
changes in v3:
- rename the XML attribute to appid as technically what user
provides is not VMID, that is created by kernel
changes in v2:
- refactor of resource parsing and formatting code
- use <fibrechannel vmid=''/> element
- use stat() directly
- report only single system error
Pavel Hrdina (5):
vircgroup: introduce virCgroupGetInode function
conf: refactor virDomainResourceDefParse
conf: refactor virDomainResourceDefFormat
conf: introduce support for Fibre Channel VMID
qemu: implement support for Fibre Channel VMID
After the obvious fix in PATCH 5/5 and question answered in 4/5 the
series is
Reviewed-by: Martin Kletzander <mkletzan(a)redhat.com>
docs/formatdomain.rst | 21 ++++++++++
docs/schemas/domaincommon.rng | 21 ++++++++--
src/conf/domain_conf.c | 42 +++++++++++--------
src/conf/domain_conf.h | 1 +
src/conf/domain_validate.c | 19 +++++++++
src/libvirt_private.syms | 1 +
src/qemu/qemu_cgroup.c | 27 ++++++++++++
src/util/vircgroup.c | 31 ++++++++++++++
src/util/vircgroup.h | 2 +
.../fibrechannel-appid.xml | 21 ++++++++++
tests/genericxml2xmltest.c | 2 +
11 files changed, 167 insertions(+), 21 deletions(-)
create mode 100644 tests/genericxml2xmlindata/fibrechannel-appid.xml
--
2.31.1
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participants (2)
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Martin Kletzander -
Pavel Hrdina