[libvirt] [PATCH 6/7] node_device: introduce new capability FC_RPORT
John Ferlan
jferlan at redhat.com
Thu May 25 19:26:22 UTC 2017
On 05/22/2017 02:38 AM, Bjoern Walk wrote:
> Similar to scsi_host and fc_host, there is a relation between a
> scsi_target and its transport specific fc_remote_port. Let's expose this
> relation and relevant information behind it.
>
> An example for a virsh nodedev-dumpxml:
>
> virsh # nodedev-dumpxml scsi_target0_0_0
> <device>
> <name>scsi_target0_0_0</name>
> <path>/sys/devices/[...]/host0/rport-0:0-0/target0:0:0</path>
> <parent>scsi_host0</parent>
> <capability type='scsi_target'>
> <target>target0:0:0</target>
> <capability type='fc_remote_port'>
> <rport>rport-0:0-0</rport>
> <wwpn>0x9d73bc45f0e21a86</wwpn>
> </capability>
> </capability>
> </device>
>
> Reviewed-by: Boris Fiuczynski <fiuczy at linux.vnet.ibm.com>
> Signed-off-by: Bjoern Walk <bwalk at linux.vnet.ibm.com>
> ---
> docs/schemas/nodedev.rng | 20 ++++++++
> src/conf/node_device_conf.c | 75 +++++++++++++++++++++++++++-
> src/conf/node_device_conf.h | 7 +++
> src/node_device/node_device_driver.c | 5 +-
> src/node_device/node_device_linux_sysfs.c | 56 +++++++++++++++++++++
> src/node_device/node_device_linux_sysfs.h | 2 +
> src/node_device/node_device_udev.c | 4 +-
> tests/nodedevschemadata/scsi_target1_0_0.xml | 12 +++++
> tests/nodedevxml2xmltest.c | 1 +
> 9 files changed, 178 insertions(+), 4 deletions(-)
> create mode 100644 tests/nodedevschemadata/scsi_target1_0_0.xml
>
> diff --git a/docs/schemas/nodedev.rng b/docs/schemas/nodedev.rng
> index 87bfb0c28..5bcf31787 100644
> --- a/docs/schemas/nodedev.rng
> +++ b/docs/schemas/nodedev.rng
> @@ -458,6 +458,20 @@
> </optional>
> </define>
>
> + <define name='capsfcrport'>
> + <attribute name='type'>
> + <value>fc_remote_port</value>
> + </attribute>
> +
> + <element name='rport'>
> + <text/>
> + </element>
> +
> + <element name='wwpn'>
> + <ref name='wwn'/>
NB: 'wwn' is a string...
> + </element>
> + </define>
> +
> <define name='capscsitarget'>
> <attribute name='type'>
> <value>scsi_target</value>
> @@ -466,6 +480,12 @@
> <element name='target'>
> <text/>
> </element>
> +
> + <optional>
> + <element name='capability'>
> + <ref name='capsfcrport'/>
> + </element>
> + </optional>
> </define>
>
> <define name='capscsi'>
> diff --git a/src/conf/node_device_conf.c b/src/conf/node_device_conf.c
> index 28d4907f5..ed003d37b 100644
> --- a/src/conf/node_device_conf.c
> +++ b/src/conf/node_device_conf.c
> @@ -563,6 +563,16 @@ virNodeDeviceDefFormat(const virNodeDeviceDef *def)
> case VIR_NODE_DEV_CAP_SCSI_TARGET:
> virBufferEscapeString(&buf, "<target>%s</target>\n",
> data->scsi_target.name);
> + if (data->scsi_target.flags & VIR_NODE_DEV_CAP_FLAG_FC_RPORT) {
> + virBufferAddLit(&buf, "<capability type='fc_remote_port'>\n");
> + virBufferAdjustIndent(&buf, 2);
> + virBufferAsprintf(&buf, "<rport>%s</rport>\n",
> + data->scsi_target.rport);
> + virBufferAsprintf(&buf, "<wwpn>0x%llx</wwpn>\n",
> + data->scsi_target.wwpn);
If you don't convert to a number, then you don't need to perform this
conversion as it's just a %s print.
> + virBufferAdjustIndent(&buf, -2);
> + virBufferAddLit(&buf, "</capability>\n");
> + }
> break;
> case VIR_NODE_DEV_CAP_SCSI:
> virNodeDeviceCapSCSIDefFormat(&buf, data);
> @@ -932,8 +942,10 @@ virNodeDevCapSCSITargetParseXML(xmlXPathContextPtr ctxt,
> xmlNodePtr node,
> virNodeDevCapSCSITargetPtr scsi_target)
> {
> - xmlNodePtr orignode;
> - int ret = -1;
> + xmlNodePtr orignode, *nodes = NULL;
> + int ret = -1, n = 0;
> + size_t i;
> + char *type = NULL, *wwpn = NULL;
>
> orignode = ctxt->node;
> ctxt->node = node;
> @@ -946,10 +958,68 @@ virNodeDevCapSCSITargetParseXML(xmlXPathContextPtr ctxt,
> goto out;
> }
>
> + if ((n = virXPathNodeSet("./capability", ctxt, &nodes)) < 0)
> + goto out;
> +
> + for (i = 0; i < n; ++i) {
> + type = virXMLPropString(nodes[i], "type");
> +
> + if (!type) {
> + virReportError(VIR_ERR_INTERNAL_ERROR,
> + _("missing type for SCSI target capability for '%s'"),
> + def->name);
> + goto out;
> + }
> +
> + if (STREQ(type, "fc_remote_port")) {
> + xmlNodePtr orignode2;
> +
> + scsi_target->flags |= VIR_NODE_DEV_CAP_FLAG_FC_RPORT;
> +
> + orignode2 = ctxt->node;
> + ctxt->node = nodes[i];
Like the virNodeDevCapSCSIHostParseXML I assume this only parses the
first 'fc_remote_port'... Trying to think whether a VIR_FREE would be
necessary here (and perhaps from SCSIHost code just in case there were
more than one <rport> or <wwpn> provided...
> +
> + if (virNodeDevCapsDefParseString("string(./rport[1])",
> + ctxt,
> + &scsi_target->rport) < 0) {
> + virReportError(VIR_ERR_INTERNAL_ERROR,
> + _("missing rport name for '%s'"), def->name);
> + goto out;
> + }
> +
> + if (virNodeDevCapsDefParseString("string(./wwpn[1])",
> + ctxt, &wwpn) < 0) {
If you don't do the conversion, this could just be a straight parse into
scsi_target->wwpn
> + virReportError(VIR_ERR_INTERNAL_ERROR,
> + _("missing wwpn identifier for '%s'"),
> + def->name);
> + goto out;
> + }
> +
> + if (virStrToLong_ullp(wwpn, NULL, 16, &scsi_target->wwpn) < 0) {
> + virReportError(VIR_ERR_INTERNAL_ERROR,
> + _("invalid wwpn identifier '%s' for '%s'"),
> + wwpn, def->name);
Why even both with this conversion?
> + goto out;
> + }
> +
> + ctxt->node = orignode2;
> + } else {
> + virReportError(VIR_ERR_INTERNAL_ERROR,
> + _("unknown SCSI target capability type '%s' for '%s'"),
> + type, def->name);
> + goto out;
> + }
> +
> + VIR_FREE(type);
> + VIR_FREE(wwpn);
> + }
> +
> ret = 0;
>
> out:
> ctxt->node = orignode;
> + VIR_FREE(type);
> + VIR_FREE(wwpn);
If you don't do the conversion, then this VIR_FREE is unnecessary.
Coverity complained that nodes was leaked, so I added a VIR_FREE(nodes);
here.
> return ret;
> }
>
> @@ -2132,6 +2202,7 @@ virNodeDevCapsDefFree(virNodeDevCapsDefPtr caps)
> break;
> case VIR_NODE_DEV_CAP_SCSI_TARGET:
> VIR_FREE(data->scsi_target.name);
> + VIR_FREE(data->scsi_target.rport);
Without the conversion there's a VIR_FREE here for wwpn
> break;
> case VIR_NODE_DEV_CAP_SCSI:
> VIR_FREE(data->scsi.type);
> diff --git a/src/conf/node_device_conf.h b/src/conf/node_device_conf.h
> index 285841edc..f5267efda 100644
> --- a/src/conf/node_device_conf.h
> +++ b/src/conf/node_device_conf.h
> @@ -93,6 +93,10 @@ typedef enum {
> } virNodeDevSCSIHostCapFlags;
>
> typedef enum {
> + VIR_NODE_DEV_CAP_FLAG_FC_RPORT = (1 << 0),
> +} virNodeDevSCSITargetCapsFlags;
> +
> +typedef enum {
> VIR_NODE_DEV_CAP_FLAG_PCI_PHYSICAL_FUNCTION = (1 << 0),
> VIR_NODE_DEV_CAP_FLAG_PCI_VIRTUAL_FUNCTION = (1 << 1),
> VIR_NODE_DEV_CAP_FLAG_PCIE = (1 << 2),
> @@ -227,6 +231,9 @@ typedef struct _virNodeDevCapSCSITarget virNodeDevCapSCSITarget;
> typedef virNodeDevCapSCSITarget *virNodeDevCapSCSITargetPtr;
> struct _virNodeDevCapSCSITarget {
> char *name;
> + unsigned int flags; /* enum virNodeDevSCSITargetCapsFlags */
> + char *rport;
> + unsigned long long wwpn;
and this would be a char *wwpn;
> };
>
> typedef struct _virNodeDevCapSCSI virNodeDevCapSCSI;
> diff --git a/src/node_device/node_device_driver.c b/src/node_device/node_device_driver.c
> index 286af26bc..acb8b89af 100644
> --- a/src/node_device/node_device_driver.c
> +++ b/src/node_device/node_device_driver.c
> @@ -56,6 +56,10 @@ static int update_caps(virNodeDeviceObjPtr dev)
> case VIR_NODE_DEV_CAP_SCSI_HOST:
> nodeDeviceSysfsGetSCSIHostCaps(&cap->data.scsi_host);
> break;
> + case VIR_NODE_DEV_CAP_SCSI_TARGET:
> + nodeDeviceSysfsGetSCSITargetCaps(dev->def->sysfs_path,
> + &cap->data.scsi_target);
> + break;
> case VIR_NODE_DEV_CAP_NET:
> if (virNetDevGetLinkInfo(cap->data.net.ifname, &cap->data.net.lnk) < 0)
> return -1;
> @@ -76,7 +80,6 @@ static int update_caps(virNodeDeviceObjPtr dev)
> case VIR_NODE_DEV_CAP_SYSTEM:
> case VIR_NODE_DEV_CAP_USB_DEV:
> case VIR_NODE_DEV_CAP_USB_INTERFACE:
> - case VIR_NODE_DEV_CAP_SCSI_TARGET:
> case VIR_NODE_DEV_CAP_SCSI:
> case VIR_NODE_DEV_CAP_STORAGE:
> case VIR_NODE_DEV_CAP_FC_HOST:
> diff --git a/src/node_device/node_device_linux_sysfs.c b/src/node_device/node_device_linux_sysfs.c
> index 1b7aa9435..90452fb29 100644
> --- a/src/node_device/node_device_linux_sysfs.c
> +++ b/src/node_device/node_device_linux_sysfs.c
> @@ -26,11 +26,13 @@
> #include <sys/stat.h>
> #include <stdlib.h>
>
> +#include "dirname.h"
> #include "node_device_driver.h"
> #include "node_device_hal.h"
> #include "node_device_linux_sysfs.h"
> #include "virerror.h"
> #include "viralloc.h"
> +#include "virfcp.h"
> #include "virlog.h"
> #include "virfile.h"
> #include "virscsihost.h"
> @@ -124,6 +126,54 @@ nodeDeviceSysfsGetSCSIHostCaps(virNodeDevCapSCSIHostPtr scsi_host)
> }
>
>
> +int
> +nodeDeviceSysfsGetSCSITargetCaps(const char *sysfsPath,
> + virNodeDevCapSCSITargetPtr scsi_target)
> +{
> + int ret = -1;
> + char *dir = NULL, *rport = NULL, *wwpn = NULL;
> +
> + VIR_DEBUG("Checking if '%s' is an FC remote port", scsi_target->name);
> +
> + /* /sys/devices/[...]/host0/rport-0:0-0/target0:0:0 -> rport-0:0-0 */
> + if (!(dir = mdir_name(sysfsPath)))
> + return -1;
> +
> + if (VIR_STRDUP(rport, last_component(dir)) < 0)
> + goto cleanup;
> +
> + if (!virFCIsCapableRport(rport))
> + goto cleanup;
> +
> + VIR_FREE(scsi_target->rport);
> + scsi_target->rport = rport;
VIR_STEAL_PTR(scsi_target->rport, rport);
> +
> + if (virFCReadRportValue(scsi_target->rport, "port_name", &wwpn) < 0) {
> + VIR_WARN("Failed to read port_name for '%s'", scsi_target->rport);
> + goto cleanup;
> + }
> +
> + if (virStrToLong_ullp(wwpn, NULL, 16, &scsi_target->wwpn) < 0) {
> + VIR_WARN("Failed to parse value of port_name '%s'", wwpn);
> + goto cleanup;
> + }
> +
> + scsi_target->flags |= VIR_NODE_DEV_CAP_FLAG_FC_RPORT;
> + ret = 0;
> +
> + cleanup:
> + if (ret < 0) {
> + VIR_FREE(scsi_target->rport);
> + scsi_target->wwpn = 0;
> + scsi_target->flags &= ~VIR_NODE_DEV_CAP_FLAG_FC_RPORT;
> + }
Coverity complained that rport could be leaked, so I added the
VIR_STEAL_PTR above and a VIR_FREE(rport); here.
> + VIR_FREE(dir);
> + VIR_FREE(wwpn);
> +
> + return ret;
> +}
> +
> +
> static int
> nodeDeviceSysfsGetPCISRIOVCaps(const char *sysfsPath,
> virNodeDevCapPCIDevPtr pci_dev)
> @@ -230,6 +280,12 @@ nodeDeviceSysfsGetSCSIHostCaps(virNodeDevCapSCSIHostPtr scsi_host ATTRIBUTE_UNUS
> return -1;
> }
>
Reviewed-by: John Ferlan <jferlan at redhat.com>
I can make the suggested changes if you'd like or you can send a v2 or a
squash diff... Let me know
John
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