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libvirt/docs/api_extension/0007-Step-7-of-8-Implement-the-driver-methods.patch

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Added docs on extending public API (Dave Allen)
2009-06-09 11:42:41 +00:00
From 04d20a662109de6727232eb1213627877bb9662f Mon Sep 17 00:00:00 2001
From: David Allan <dallan@redhat.com>
Date: Tue, 19 May 2009 16:35:15 -0400
Subject: [PATCH] Step 7 of 8 Implement the driver methods
---
src/Makefile.am | 4 +-
src/node_device.c | 430 +++++++++++++++++++++++++++++++++++++++++++
src/node_device.h | 13 ++
src/node_device_conf.c | 136 ++++++++++++--
src/node_device_conf.h | 22 ++-
src/node_device_hal.c | 5 +
src/node_device_hal.h | 40 ++++
src/node_device_hal_linux.c | 170 +++++++++++++++++
src/qemu_driver.c | 2 +-
src/storage_backend.c | 24 +--
src/xen_unified.c | 2 +-
tests/nodedevxml2xmltest.c | 2 +-
12 files changed, 810 insertions(+), 40 deletions(-)
create mode 100644 src/node_device_hal.h
create mode 100644 src/node_device_hal_linux.c
diff --git a/src/Makefile.am b/src/Makefile.am
index fd692b4..39fabce 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -188,7 +188,9 @@ NODE_DEVICE_DRIVER_SOURCES = \
node_device.c node_device.h
NODE_DEVICE_DRIVER_HAL_SOURCES = \
- node_device_hal.c
+ node_device_hal.c \
+ node_device_hal_linux.c
+
NODE_DEVICE_DRIVER_DEVKIT_SOURCES = \
node_device_devkit.c
diff --git a/src/node_device.c b/src/node_device.c
index b84729f..4f73baf 100644
--- a/src/node_device.c
+++ b/src/node_device.c
@@ -25,6 +25,8 @@
#include <unistd.h>
#include <errno.h>
+#include <fcntl.h>
+#include <time.h>
#include "virterror_internal.h"
#include "datatypes.h"
@@ -133,6 +135,53 @@ cleanup:
return ret;
}
+
+static virNodeDevicePtr
+nodeDeviceLookupByWWN(virConnectPtr conn,
+ const char *wwnn,
+ const char *wwpn)
+{
+ unsigned int i;
+ virDeviceMonitorStatePtr driver = conn->devMonPrivateData;
+ virNodeDeviceObjListPtr devs = &driver->devs;
+ virNodeDevCapsDefPtr cap = NULL;
+ virNodeDeviceObjPtr obj = NULL;
+ virNodeDevicePtr dev = NULL;
+
+ nodeDeviceLock(driver);
+
+ for (i = 0; i < devs->count; i++) {
+
+ obj = devs->objs[i];
+ virNodeDeviceObjLock(obj);
+ cap = obj->def->caps;
+
+ while (cap) {
+
+ if (cap->type == VIR_NODE_DEV_CAP_SCSI_HOST) {
+ if (cap->data.scsi_host.flags &
+ VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST) {
+
+ if (STREQ(cap->data.scsi_host.wwnn, wwnn) &&
+ STREQ(cap->data.scsi_host.wwpn, wwpn)) {
+ dev = virGetNodeDevice(conn, obj->def->name);
+ virNodeDeviceObjUnlock(obj);
+ goto out;
+ }
+ }
+ }
+ cap = cap->next;
+ }
+
+ virNodeDeviceObjUnlock(obj);
+ }
+
+out:
+ nodeDeviceUnlock(driver);
+ return dev;
+}
+
+
static char *nodeDeviceDumpXML(virNodeDevicePtr dev,
unsigned int flags ATTRIBUTE_UNUSED)
{
@@ -258,6 +307,385 @@ cleanup:
}
+static int
+nodeDeviceVportCreateDelete(virConnectPtr conn,
+ const int parent_host,
+ const char *wwpn,
+ const char *wwnn,
+ int operation)
+{
+ int fd = -1;
+ int retval = 0;
+ char *operation_path = NULL, *vport_name = NULL;
+ const char *operation_file = NULL;
+ size_t towrite = 0;
+ unsigned int written = 0;
+
+ switch (operation) {
+ case VPORT_CREATE:
+ operation_file = LINUX_SYSFS_VPORT_CREATE_POSTFIX;
+ break;
+ case VPORT_DELETE:
+ operation_file = LINUX_SYSFS_VPORT_DELETE_POSTFIX;
+ break;
+ default:
+ virNodeDeviceReportError(conn, VIR_ERR_INTERNAL_ERROR,
+ _("Invalid vport operation (%d)"), operation);
+ retval = -1;
+ goto cleanup;
+ break;
+ }
+
+ if (virAsprintf(&operation_path,
+ "%shost%d%s",
+ LINUX_SYSFS_FC_HOST_PREFIX,
+ parent_host,
+ operation_file) < 0) {
+
+ virReportOOMError(conn);
+ retval = -1;
+ goto cleanup;
+ }
+
+ VIR_DEBUG(_("Vport operation path is '%s'"), operation_path);
+
+ fd = open(operation_path, O_WRONLY);
+
+ if (fd < 0) {
+ virReportSystemError(conn, errno,
+ _("Could not open '%s' for vport operation"),
+ operation_path);
+ retval = -1;
+ goto cleanup;
+ }
+
+ if (virAsprintf(&vport_name,
+ "%s:%s",
+ wwpn,
+ wwnn) < 0) {
+
+ virReportOOMError(conn);
+ retval = -1;
+ goto cleanup;
+ }
+
+ towrite = strlen(vport_name);
+ written = safewrite(fd, vport_name, towrite);
+ if (written != towrite) {
+ virReportSystemError(conn, errno,
+ _("Write of '%s' to '%s' during "
+ "vport create/delete failed "
+ "(towrite: %lu written: %d)"),
+ vport_name, operation_path,
+ towrite, written);
+ retval = -1;
+ }
+
+cleanup:
+ if (fd != -1) {
+ close(fd);
+ }
+ VIR_FREE(vport_name);
+ VIR_FREE(operation_path);
+ VIR_DEBUG("%s", _("Vport operation complete"));
+ return retval;
+}
+
+
+static int
+get_wwns(virConnectPtr conn,
+ virNodeDeviceDefPtr def,
+ char **wwnn,
+ char **wwpn)
+{
+ virNodeDevCapsDefPtr cap = NULL;
+ int ret = 0;
+
+ cap = def->caps;
+ while (cap != NULL) {
+ if (cap->type == VIR_NODE_DEV_CAP_SCSI_HOST &&
+ cap->data.scsi_host.flags & VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST) {
+ *wwnn = strdup(cap->data.scsi_host.wwnn);
+ *wwpn = strdup(cap->data.scsi_host.wwpn);
+ break;
+ }
+
+ cap = cap->next;
+ }
+
+ if (cap == NULL) {
+ virNodeDeviceReportError(conn, VIR_ERR_NO_SUPPORT,
+ "%s", _("Device is not a fibre channel HBA"));
+ ret = -1;
+ }
+
+ if (*wwnn == NULL || *wwpn == NULL) {
+ /* Free the other one, if allocated... */
+ VIR_FREE(wwnn);
+ VIR_FREE(wwpn);
+ ret = -1;
+ virReportOOMError(conn);
+ }
+
+ return ret;
+}
+
+
+static int
+get_parent_host(virConnectPtr conn,
+ virDeviceMonitorStatePtr driver,
+ const char *dev_name,
+ const char *parent_name,
+ int *parent_host)
+{
+ virNodeDeviceObjPtr parent = NULL;
+ virNodeDevCapsDefPtr cap = NULL;
+ int ret = 0;
+
+ parent = virNodeDeviceFindByName(&driver->devs, parent_name);
+ if (parent == NULL) {
+ virNodeDeviceReportError(conn, VIR_ERR_INVALID_NODE_DEVICE,
+ _("Could not find parent device for '%s'"),
+ dev_name);
+ ret = -1;
+ goto out;
+ }
+
+ cap = parent->def->caps;
+ while (cap != NULL) {
+ if (cap->type == VIR_NODE_DEV_CAP_SCSI_HOST &&
+ (cap->data.scsi_host.flags &
+ VIR_NODE_DEV_CAP_FLAG_HBA_VPORT_OPS)) {
+ *parent_host = cap->data.scsi_host.host;
+ break;
+ }
+
+ cap = cap->next;
+ }
+
+ if (cap == NULL) {
+ virNodeDeviceReportError(conn, VIR_ERR_INVALID_NODE_DEVICE,
+ _("Device %s is not capable of vport operations"),
+ parent->def->name);
+ ret = -1;
+ }
+
+ virNodeDeviceObjUnlock(parent);
+
+out:
+ return ret;
+}
+
+
+static int
+get_time(virConnectPtr conn, time_t *t)
+{
+ int ret = 0;
+
+ *t = time(NULL);
+ if (*t == (time_t)-1) {
+ virNodeDeviceReportError(conn, VIR_ERR_INTERNAL_ERROR,
+ "%s", _("Could not get current time"));
+
+ *t = 0;
+ ret = -1;
+ }
+
+ return ret;
+}
+
+
+/* When large numbers of devices are present on the host, it's
+ * possible for udev not to realize that it has work to do before we
+ * get here. We thus keep trying to find the new device we just
+ * created for up to LINUX_NEW_DEVICE_WAIT_TIME. Note that udev's
+ * default settle time is 180 seconds, so once udev realizes that it
+ * has work to do, it might take that long for the udev wait to
+ * return. Thus the total maximum time for this function to return is
+ * the udev settle time plus LINUX_NEW_DEVICE_WAIT_TIME.
+ *
+ * This whole area is a race, but if we retry the udev wait for
+ * LINUX_NEW_DEVICE_WAIT_TIME seconds and there's still no device,
+ * it's probably safe to assume it's not going to appear.
+ */
+static virNodeDevicePtr
+find_new_device(virConnectPtr conn, const char *wwnn, const char *wwpn)
+{
+ virDeviceMonitorStatePtr driver = conn->devMonPrivateData;
+ virNodeDevicePtr dev = NULL;
+ time_t start = 0, now = 0;
+
+ /* The thread that creates the device takes the driver lock, so we
+ * must release it in order to allow the device to be created.
+ * We're not doing anything with the driver pointer at this point,
+ * so it's safe to release it, assuming that the pointer itself
+ * doesn't become invalid. */
+ nodeDeviceUnlock(driver);
+
+ get_time(conn, &start);
+
+ while ((now - start) < LINUX_NEW_DEVICE_WAIT_TIME) {
+
+ virNodeDeviceWaitForDevices(conn);
+
+ dev = nodeDeviceLookupByWWN(conn, wwnn, wwpn);
+
+ if (dev != NULL) {
+ break;
+ }
+
+ sleep(5);
+ if (get_time(conn, &now) == -1) {
+ break;
+ }
+ }
+
+ nodeDeviceLock(driver);
+
+ return dev;
+}
+
+static virNodeDevicePtr
+nodeDeviceCreateXML(virConnectPtr conn,
+ const char *xmlDesc,
+ unsigned int flags ATTRIBUTE_UNUSED)
+{
+ virDeviceMonitorStatePtr driver = conn->devMonPrivateData;
+ virNodeDeviceDefPtr def = NULL;
+ char *wwnn = NULL, *wwpn = NULL;
+ int parent_host = -1;
+ virNodeDevicePtr dev = NULL;
+
+ nodeDeviceLock(driver);
+
+ def = virNodeDeviceDefParseString(conn, xmlDesc, CREATE_DEVICE);
+ if (def == NULL) {
+ goto cleanup;
+ }
+
+ if (get_wwns(conn, def, &wwnn, &wwpn) == -1) {
+ goto cleanup;
+ }
+
+ if (get_parent_host(conn,
+ driver,
+ def->name,
+ def->parent,
+ &parent_host) == -1) {
+ goto cleanup;
+ }
+
+ if (nodeDeviceVportCreateDelete(conn,
+ parent_host,
+ wwpn,
+ wwnn,
+ VPORT_CREATE) == -1) {
+ goto cleanup;
+ }
+
+ dev = find_new_device(conn, wwnn, wwpn);
+ /* We don't check the return value, because one way or another,
+ * we're returning what we get... */
+
+ if (dev == NULL) {
+ virNodeDeviceReportError(conn, VIR_ERR_NO_NODE_DEVICE, NULL);
+ }
+
+cleanup:
+ nodeDeviceUnlock(driver);
+ virNodeDeviceDefFree(def);
+ VIR_FREE(wwnn);
+ VIR_FREE(wwpn);
+ return dev;
+}
+
+
+static int
+nodeDeviceDestroy(virNodeDevicePtr dev)
+{
+ int ret = 0;
+ virDeviceMonitorStatePtr driver = dev->conn->devMonPrivateData;
+ virNodeDeviceObjPtr obj = NULL;
+ char *parent_name = NULL, *wwnn = NULL, *wwpn = NULL;
+ int parent_host = -1;
+
+ nodeDeviceLock(driver);
+ obj = virNodeDeviceFindByName(&driver->devs, dev->name);
+ nodeDeviceUnlock(driver);
+
+ if (!obj) {
+ virNodeDeviceReportError(dev->conn, VIR_ERR_NO_NODE_DEVICE, NULL);
+ goto out;
+ }
+
+ if (get_wwns(dev->conn, obj->def, &wwnn, &wwpn) == -1) {
+ goto out;
+ }
+
+ parent_name = strdup(obj->def->parent);
+
+ /* get_parent_host will cause the device object's lock to be
+ * taken, so we have to dup the parent's name and drop the lock
+ * before calling it. We don't need the reference to the object
+ * any more once we have the parent's name. */
+ virNodeDeviceObjUnlock(obj);
+ obj = NULL;
+
+ if (parent_name == NULL) {
+ virReportOOMError(dev->conn);
+ goto out;
+ }
+
+ if (get_parent_host(dev->conn,
+ driver,
+ dev->name,
+ parent_name,
+ &parent_host) == -1) {
+ goto out;
+ }
+
+ if (nodeDeviceVportCreateDelete(dev->conn,
+ parent_host,
+ wwpn,
+ wwnn,
+ VPORT_DELETE) == -1) {
+ goto out;
+ }
+
+out:
+ VIR_FREE(parent_name);
+ VIR_FREE(wwnn);
+ VIR_FREE(wwpn);
+ return ret;
+}
+
+
+#if defined(UDEVADM) || defined(UDEVSETTLE)
+void virNodeDeviceWaitForDevices(virConnectPtr conn)
+{
+#ifdef UDEVADM
+ const char *const settleprog[] = { UDEVADM, "settle", NULL };
+#else
+ const char *const settleprog[] = { UDEVSETTLE, NULL };
+#endif
+ int exitstatus;
+
+ if (access(settleprog[0], X_OK) != 0)
+ return;
+
+ /*
+ * NOTE: we ignore errors here; this is just to make sure that any device
+ * nodes that are being created finish before we try to scan them.
+ * If this fails for any reason, we still have the backup of polling for
+ * 5 seconds for device nodes.
+ */
+ virRun(conn, settleprog, &exitstatus);
+}
+#else
+void virNodeDeviceWaitForDevices(virConnectPtr conn ATTRIBUTE_UNUSED) {}
+#endif
+
+
void registerCommonNodeFuncs(virDeviceMonitorPtr driver)
{
driver->numOfDevices = nodeNumOfDevices;
@@ -267,6 +695,8 @@ void registerCommonNodeFuncs(virDeviceMonitorPtr driver)
driver->deviceGetParent = nodeDeviceGetParent;
driver->deviceNumOfCaps = nodeDeviceNumOfCaps;
driver->deviceListCaps = nodeDeviceListCaps;
+ driver->deviceCreateXML = nodeDeviceCreateXML;
+ driver->deviceDestroy = nodeDeviceDestroy;
}
diff --git a/src/node_device.h b/src/node_device.h
index 9496120..882ba0f 100644
--- a/src/node_device.h
+++ b/src/node_device.h
@@ -28,6 +28,17 @@
#include "driver.h"
#include "node_device_conf.h"
+#define LINUX_SYSFS_SCSI_HOST_PREFIX "/sys/class/scsi_host"
+#define LINUX_SYSFS_SCSI_HOST_POSTFIX "device"
+#define LINUX_SYSFS_FC_HOST_PREFIX "/sys/class/fc_host/"
+
+#define VPORT_CREATE 0
+#define VPORT_DELETE 1
+#define LINUX_SYSFS_VPORT_CREATE_POSTFIX "/vport_create"
+#define LINUX_SYSFS_VPORT_DELETE_POSTFIX "/vport_delete"
+
+#define LINUX_NEW_DEVICE_WAIT_TIME 60
+
#ifdef HAVE_HAL
int halNodeRegister(void);
#endif
@@ -42,4 +53,6 @@ void registerCommonNodeFuncs(virDeviceMonitorPtr mon);
int nodedevRegister(void);
+void virNodeDeviceWaitForDevices(virConnectPtr conn);
+
#endif /* __VIR_NODE_DEVICE_H__ */
diff --git a/src/node_device_conf.c b/src/node_device_conf.c
index 6e04112..5b35b60 100644
--- a/src/node_device_conf.c
+++ b/src/node_device_conf.c
@@ -53,9 +53,34 @@ VIR_ENUM_IMPL(virNodeDevNetCap, VIR_NODE_DEV_CAP_NET_LAST,
"80203",
"80211")
+VIR_ENUM_IMPL(virNodeDevHBACap, VIR_NODE_DEV_CAP_HBA_LAST,
+ "fc_host",
+ "vport_ops")
#define virNodeDeviceLog(msg...) fprintf(stderr, msg)
+static int
+virNodeDevCapsDefParseString(virConnectPtr conn,
+ const char *xpath,
+ xmlXPathContextPtr ctxt,
+ char **string,
+ virNodeDeviceDefPtr def,
+ const char *missing_error_fmt)
+{
+ char *s;
+
+ s = virXPathString(conn, xpath, ctxt);
+ if (s == NULL) {
+ virNodeDeviceReportError(conn, VIR_ERR_INTERNAL_ERROR,
+ missing_error_fmt,
+ def->name);
+ return -1;
+ }
+
+ *string = s;
+ return 0;
+}
+
virNodeDeviceObjPtr virNodeDeviceFindByName(const virNodeDeviceObjListPtr devs,
const char *name)
{
@@ -302,6 +327,18 @@ char *virNodeDeviceDefFormat(virConnectPtr conn,
case VIR_NODE_DEV_CAP_SCSI_HOST:
virBufferVSprintf(&buf, " <host>%d</host>\n",
data->scsi_host.host);
+ if (data->scsi_host.flags & VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST) {
+ virBufferAddLit(&buf, " <capability type='fc_host'>\n");
+ virBufferVSprintf(&buf,
+ " <wwnn>%s</wwnn>\n", data->scsi_host.wwnn);
+ virBufferVSprintf(&buf,
+ " <wwpn>%s</wwpn>\n", data->scsi_host.wwpn);
+ virBufferAddLit(&buf, " </capability>\n");
+ }
+ if (data->scsi_host.flags & VIR_NODE_DEV_CAP_FLAG_HBA_VPORT_OPS) {
+ virBufferAddLit(&buf, " <capability type='vport_ops' />\n");
+ }
+
break;
case VIR_NODE_DEV_CAP_SCSI:
virBufferVSprintf(&buf, " <host>%d</host>\n", data->scsi.host);
@@ -561,26 +598,91 @@ virNodeDevCapScsiHostParseXML(virConnectPtr conn,
xmlXPathContextPtr ctxt,
virNodeDeviceDefPtr def,
xmlNodePtr node,
- union _virNodeDevCapData *data)
+ union _virNodeDevCapData *data,
+ int create)
{
- xmlNodePtr orignode;
- int ret = -1;
+ xmlNodePtr orignode, *nodes = NULL;
+ int ret = -1, n = 0, i;
+ char *type = NULL;
orignode = ctxt->node;
ctxt->node = node;
- if (virNodeDevCapsDefParseULong(conn, "number(./host[1])", ctxt,
+ if (create == EXISTING_DEVICE &&
+ virNodeDevCapsDefParseULong(conn, "number(./host[1])", ctxt,
&data->scsi_host.host, def,
_("no SCSI host ID supplied for '%s'"),
- _("invalid SCSI host ID supplied for '%s'")) < 0)
+ _("invalid SCSI host ID supplied for '%s'")) < 0) {
goto out;
+ }
+
+ if ((n = virXPathNodeSet(conn, "./capability", ctxt, &nodes)) < 0) {
+ virNodeDeviceReportError(conn, VIR_ERR_INTERNAL_ERROR,
+ _("error parsing SCSI host capabilities for '%s'"),
+ def->name);
+ goto out;
+ }
+
+ for (i = 0 ; i < n ; i++) {
+ type = virXMLPropString(nodes[i], "type");
+
+ if (!type) {
+ virNodeDeviceReportError(conn, VIR_ERR_INTERNAL_ERROR,
+ _("missing SCSI host capability type for '%s'"),
+ def->name);
+ goto out;
+ }
+
+ if (STREQ(type, "vport_ops")) {
+
+ data->scsi_host.flags |= VIR_NODE_DEV_CAP_FLAG_HBA_VPORT_OPS;
+
+ } else if (STREQ(type, "fc_host")) {
+
+ xmlNodePtr orignode2;
+
+ data->scsi_host.flags |= VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST;
+
+ orignode2 = ctxt->node;
+ ctxt->node = nodes[i];
+
+ if (virNodeDevCapsDefParseString(conn, "string(./wwnn[1])",
+ ctxt,
+ &data->scsi_host.wwnn,
+ def,
+ _("no WWNN supplied for '%s'")) < 0) {
+ goto out;
+ }
+
+ if (virNodeDevCapsDefParseString(conn, "string(./wwpn[1])",
+ ctxt,
+ &data->scsi_host.wwpn,
+ def,
+ _("no WWPN supplied for '%s'")) < 0) {
+ goto out;
+ }
+
+ ctxt->node = orignode2;
+
+ } else {
+ virNodeDeviceReportError(conn, VIR_ERR_INTERNAL_ERROR,
+ _("unknown SCSI host capability type '%s' for '%s'"),
+ type, def->name);
+ goto out;
+ }
+
+ VIR_FREE(type);
+ }
ret = 0;
+
out:
+ VIR_FREE(type);
ctxt->node = orignode;
return ret;
}
+
static int
virNodeDevCapNetParseXML(virConnectPtr conn,
xmlXPathContextPtr ctxt,
@@ -848,7 +950,8 @@ static virNodeDevCapsDefPtr
virNodeDevCapsDefParseXML(virConnectPtr conn,
xmlXPathContextPtr ctxt,
virNodeDeviceDefPtr def,
- xmlNodePtr node)
+ xmlNodePtr node,
+ int create)
{
virNodeDevCapsDefPtr caps;
char *tmp;
@@ -892,7 +995,7 @@ virNodeDevCapsDefParseXML(virConnectPtr conn,
ret = virNodeDevCapNetParseXML(conn, ctxt, def, node, &caps->data);
break;
case VIR_NODE_DEV_CAP_SCSI_HOST:
- ret = virNodeDevCapScsiHostParseXML(conn, ctxt, def, node, &caps->data);
+ ret = virNodeDevCapScsiHostParseXML(conn, ctxt, def, node, &caps->data, create);
break;
case VIR_NODE_DEV_CAP_SCSI:
ret = virNodeDevCapScsiParseXML(conn, ctxt, def, node, &caps->data);
@@ -918,7 +1021,7 @@ error:
}
static virNodeDeviceDefPtr
-virNodeDeviceDefParseXML(virConnectPtr conn, xmlXPathContextPtr ctxt)
+virNodeDeviceDefParseXML(virConnectPtr conn, xmlXPathContextPtr ctxt, int create)
{
virNodeDeviceDefPtr def;
virNodeDevCapsDefPtr *next_cap;
@@ -931,7 +1034,12 @@ virNodeDeviceDefParseXML(virConnectPtr conn, xmlXPathContextPtr ctxt)
}
/* Extract device name */
- def->name = virXPathString(conn, "string(./name[1])", ctxt);
+ if (create == EXISTING_DEVICE) {
+ def->name = virXPathString(conn, "string(./name[1])", ctxt);
+ } else {
+ def->name = strdup("new device");
+ }
+
if (!def->name) {
virNodeDeviceReportError(conn, VIR_ERR_NO_NAME, NULL);
goto error;
@@ -951,7 +1059,7 @@ virNodeDeviceDefParseXML(virConnectPtr conn, xmlXPathContextPtr ctxt)
next_cap = &def->caps;
for (i = 0 ; i < n ; i++) {
- *next_cap = virNodeDevCapsDefParseXML(conn, ctxt, def, nodes[i]);
+ *next_cap = virNodeDevCapsDefParseXML(conn, ctxt, def, nodes[i], create);
if (!*next_cap) {
VIR_FREE(nodes);
goto error;
@@ -969,7 +1077,7 @@ virNodeDeviceDefParseXML(virConnectPtr conn, xmlXPathContextPtr ctxt)
}
static virNodeDeviceDefPtr
-virNodeDeviceDefParseNode(virConnectPtr conn, xmlDocPtr xml, xmlNodePtr root)
+virNodeDeviceDefParseNode(virConnectPtr conn, xmlDocPtr xml, xmlNodePtr root, int create)
{
xmlXPathContextPtr ctxt = NULL;
virNodeDeviceDefPtr def = NULL;
@@ -987,7 +1095,7 @@ virNodeDeviceDefParseNode(virConnectPtr conn, xmlDocPtr xml, xmlNodePtr root)
}
ctxt->node = root;
- def = virNodeDeviceDefParseXML(conn, ctxt);
+ def = virNodeDeviceDefParseXML(conn, ctxt, create);
cleanup:
xmlXPathFreeContext(ctxt);
@@ -1015,7 +1123,7 @@ catchXMLError(void *ctx, const char *msg ATTRIBUTE_UNUSED, ...)
}
virNodeDeviceDefPtr
-virNodeDeviceDefParseString(virConnectPtr conn, const char *str)
+virNodeDeviceDefParseString(virConnectPtr conn, const char *str, int create)
{
xmlParserCtxtPtr pctxt;
xmlDocPtr xml = NULL;
@@ -1046,7 +1154,7 @@ virNodeDeviceDefParseString(virConnectPtr conn, const char *str)
goto cleanup;
}
- def = virNodeDeviceDefParseNode(conn, xml, root);
+ def = virNodeDeviceDefParseNode(conn, xml, root, create);
cleanup:
xmlFreeParserCtxt(pctxt);
diff --git a/src/node_device_conf.h b/src/node_device_conf.h
index 26e5558..62b4e71 100644
--- a/src/node_device_conf.h
+++ b/src/node_device_conf.h
@@ -28,6 +28,9 @@
#include "util.h"
#include "threads.h"
+#define CREATE_DEVICE 1
+#define EXISTING_DEVICE 0
+
enum virNodeDevCapType {
/* Keep in sync with VIR_ENUM_IMPL in node_device_conf.c */
VIR_NODE_DEV_CAP_SYSTEM, /* System capability */
@@ -48,8 +51,16 @@ enum virNodeDevNetCapType {
VIR_NODE_DEV_CAP_NET_LAST
};
+enum virNodeDevHBACapType {
+ /* Keep in sync with VIR_ENUM_IMPL in node_device_conf.c */
+ VIR_NODE_DEV_CAP_HBA_FC_HOST, /* fibre channel HBA */
+ VIR_NODE_DEV_CAP_HBA_VPORT_OPS, /* capable of vport operations */
+ VIR_NODE_DEV_CAP_HBA_LAST
+};
+
VIR_ENUM_DECL(virNodeDevCap)
VIR_ENUM_DECL(virNodeDevNetCap)
+VIR_ENUM_DECL(virNodeDevHBACap)
enum virNodeDevStorageCapFlags {
VIR_NODE_DEV_CAP_STORAGE_REMOVABLE = (1 << 0),
@@ -57,6 +68,11 @@ enum virNodeDevStorageCapFlags {
VIR_NODE_DEV_CAP_STORAGE_HOTPLUGGABLE = (1 << 2),
};
+enum virNodeDevScsiHostCapFlags {
+ VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST = (1 << 0),
+ VIR_NODE_DEV_CAP_FLAG_HBA_VPORT_OPS = (1 << 1),
+};
+
typedef struct _virNodeDevCapsDef virNodeDevCapsDef;
typedef virNodeDevCapsDef *virNodeDevCapsDefPtr;
struct _virNodeDevCapsDef {
@@ -108,6 +124,9 @@ struct _virNodeDevCapsDef {
} net;
struct {
unsigned host;
+ char *wwnn;
+ char *wwpn;
+ unsigned flags;
} scsi_host;
struct {
unsigned host;
@@ -185,7 +204,8 @@ char *virNodeDeviceDefFormat(virConnectPtr conn,
const virNodeDeviceDefPtr def);
virNodeDeviceDefPtr virNodeDeviceDefParseString(virConnectPtr conn,
- const char *str);
+ const char *str,
+ int create);
void virNodeDeviceDefFree(virNodeDeviceDefPtr def);
diff --git a/src/node_device_hal.c b/src/node_device_hal.c
index b214f60..5927ba1 100644
--- a/src/node_device_hal.c
+++ b/src/node_device_hal.c
@@ -28,6 +28,7 @@
#include <libhal.h>
#include "node_device_conf.h"
+#include "node_device_hal.h"
#include "virterror_internal.h"
#include "driver.h"
#include "datatypes.h"
@@ -37,6 +38,8 @@
#include "logging.h"
#include "node_device.h"
+#define VIR_FROM_THIS VIR_FROM_NODEDEV
+
/*
* Host device enumeration (HAL implementation)
*/
@@ -215,6 +218,8 @@ static int gather_scsi_host_cap(LibHalContext *ctx, const char *udi,
union _virNodeDevCapData *d)
{
(void)get_int_prop(ctx, udi, "scsi_host.host", (int *)&d->scsi_host.host);
+ (void)check_fc_host(d);
+ (void)check_vport_capable(d);
return 0;
}
diff --git a/src/node_device_hal.h b/src/node_device_hal.h
new file mode 100644
index 0000000..0b4a2ef
--- /dev/null
+++ b/src/node_device_hal.h
@@ -0,0 +1,40 @@
+/*
+ * node_device_hal.h: node device enumeration - HAL-based implementation
+ *
+ * Copyright (C) 2009 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#ifndef __VIR_NODE_DEVICE_HAL_H__
+#define __VIR_NODE_DEVICE_HAL_H__
+
+#ifdef __linux__
+
+#define check_fc_host(d) check_fc_host_linux(d)
+int check_fc_host_linux(union _virNodeDevCapData *d);
+
+#define check_vport_capable(d) check_vport_capable_linux(d)
+int check_vport_capable_linux(union _virNodeDevCapData *d);
+
+#else /* __linux__ */
+
+#define check_fc_host(d)
+#define check_vport_capable(d)
+
+#endif /* __linux__ */
+
+#endif /* __VIR_NODE_DEVICE_HAL_H__ */
diff --git a/src/node_device_hal_linux.c b/src/node_device_hal_linux.c
new file mode 100644
index 0000000..1deb6d2
--- /dev/null
+++ b/src/node_device_hal_linux.c
@@ -0,0 +1,170 @@
+/*
+ * node_device_hal_linuc.c: Linux specific code to gather device data
+ * not available through HAL.
+ *
+ * Copyright (C) 2009 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <config.h>
+
+#include <fcntl.h>
+
+#include "node_device.h"
+#include "node_device_hal.h"
+#include "virterror_internal.h"
+#include "memory.h"
+#include "logging.h"
+
+#define VIR_FROM_THIS VIR_FROM_NODEDEV
+
+#ifdef __linux__
+
+int check_fc_host_linux(union _virNodeDevCapData *d)
+{
+ char *sysfs_path = NULL;
+ char *wwnn_path = NULL;
+ char *wwpn_path = NULL;
+ char *p = NULL;
+ int fd = -1;
+ char buf[64];
+ struct stat st;
+
+ VIR_DEBUG(_("Checking if host%d is an FC HBA"), d->scsi_host.host);
+
+ if (virAsprintf(&sysfs_path, "%s/host%d",
+ LINUX_SYSFS_FC_HOST_PREFIX,
+ d->scsi_host.host) < 0) {
+ virReportOOMError(NULL);
+ goto out;
+ }
+
+ if (stat(sysfs_path, &st) != 0) {
+ /* Not an FC HBA */
+ goto out;
+ }
+
+ d->scsi_host.flags |= VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST;
+
+ if (virAsprintf(&wwnn_path, "%s/node_name",
+ sysfs_path) < 0) {
+ virReportOOMError(NULL);
+ goto out;
+ }
+
+ if ((fd = open(wwnn_path, O_RDONLY)) < 0) {
+ goto out;
+ }
+
+ memset(buf, 0, sizeof(buf));
+ if (saferead(fd, buf, sizeof(buf)) < 0) {
+ goto out;
+ }
+
+ close(fd);
+ fd = -1;
+
+ p = strstr(buf, "0x");
+ if (p != NULL) {
+ p += strlen("0x");
+ } else {
+ p = buf;
+ }
+
+ d->scsi_host.wwnn = strndup(p, sizeof(buf));
+ if (d->scsi_host.wwnn == NULL) {
+ virReportOOMError(NULL);
+ goto out;
+ }
+
+ p = strchr(d->scsi_host.wwnn, '\n');
+ if (p != NULL) {
+ *p = '\0';
+ }
+
+ if (virAsprintf(&wwpn_path, "%s/port_name",
+ sysfs_path) < 0) {
+ virReportOOMError(NULL);
+ goto out;
+ }
+
+ if ((fd = open(wwpn_path, O_RDONLY)) < 0) {
+ goto out;
+ }
+
+ memset(buf, 0, sizeof(buf));
+ if (saferead(fd, buf, sizeof(buf)) < 0) {
+ goto out;
+ }
+
+ close(fd);
+ fd = -1;
+
+ p = strstr(buf, "0x");
+ if (p != NULL) {
+ p += strlen("0x");
+ } else {
+ p = buf;
+ }
+
+ d->scsi_host.wwpn = strndup(p, sizeof(buf));
+ if (d->scsi_host.wwpn == NULL) {
+ virReportOOMError(NULL);
+ goto out;
+ }
+
+ p = strchr(d->scsi_host.wwpn, '\n');
+ if (p != NULL) {
+ *p = '\0';
+ }
+
+out:
+ if (fd != -1) {
+ close(fd);
+ }
+ VIR_FREE(sysfs_path);
+ VIR_FREE(wwnn_path);
+ VIR_FREE(wwpn_path);
+ return 0;
+}
+
+
+int check_vport_capable_linux(union _virNodeDevCapData *d)
+{
+ char *sysfs_path = NULL;
+ struct stat st;
+
+ if (virAsprintf(&sysfs_path, "%s/host%d/vport_create",
+ LINUX_SYSFS_FC_HOST_PREFIX,
+ d->scsi_host.host) < 0) {
+ virReportOOMError(NULL);
+ goto out;
+ }
+
+ if (stat(sysfs_path, &st) != 0) {
+ /* Not a vport capable HBA */
+ goto out;
+ }
+
+ d->scsi_host.flags |= VIR_NODE_DEV_CAP_FLAG_HBA_VPORT_OPS;
+
+out:
+ VIR_FREE(sysfs_path);
+ return 0;
+}
+
+#endif /* __linux__ */
diff --git a/src/qemu_driver.c b/src/qemu_driver.c
index bd60b29..057e97b 100644
--- a/src/qemu_driver.c
+++ b/src/qemu_driver.c
@@ -5089,7 +5089,7 @@ qemudNodeDeviceGetPciInfo (virNodeDevicePtr dev,
if (!xml)
goto out;
- def = virNodeDeviceDefParseString(dev->conn, xml);
+ def = virNodeDeviceDefParseString(dev->conn, xml, EXISTING_DEVICE);
if (!def)
goto out;
diff --git a/src/storage_backend.c b/src/storage_backend.c
index b154140..74759cf 100644
--- a/src/storage_backend.c
+++ b/src/storage_backend.c
@@ -46,6 +46,7 @@
#include "virterror_internal.h"
#include "util.h"
#include "memory.h"
+#include "node_device.h"
#include "storage_backend.h"
@@ -245,30 +246,11 @@ virStorageBackendUpdateVolTargetInfoFD(virConnectPtr conn,
return 0;
}
-#if defined(UDEVADM) || defined(UDEVSETTLE)
void virStorageBackendWaitForDevices(virConnectPtr conn)
{
-#ifdef UDEVADM
- const char *const settleprog[] = { UDEVADM, "settle", NULL };
-#else
- const char *const settleprog[] = { UDEVSETTLE, NULL };
-#endif
- int exitstatus;
-
- if (access(settleprog[0], X_OK) != 0)
- return;
-
- /*
- * NOTE: we ignore errors here; this is just to make sure that any device
- * nodes that are being created finish before we try to scan them.
- * If this fails for any reason, we still have the backup of polling for
- * 5 seconds for device nodes.
- */
- virRun(conn, settleprog, &exitstatus);
+ virNodeDeviceWaitForDevices(conn);
+ return;
}
-#else
-void virStorageBackendWaitForDevices(virConnectPtr conn ATTRIBUTE_UNUSED) {}
-#endif
/*
* Given a volume path directly in /dev/XXX, iterate over the
diff --git a/src/xen_unified.c b/src/xen_unified.c
index e708980..8da4e23 100644
--- a/src/xen_unified.c
+++ b/src/xen_unified.c
@@ -1439,7 +1439,7 @@ xenUnifiedNodeDeviceGetPciInfo (virNodeDevicePtr dev,
if (!xml)
goto out;
- def = virNodeDeviceDefParseString(dev->conn, xml);
+ def = virNodeDeviceDefParseString(dev->conn, xml, EXISTING_DEVICE);
if (!def)
goto out;
diff --git a/tests/nodedevxml2xmltest.c b/tests/nodedevxml2xmltest.c
index 29cdb9e..7621212 100644
--- a/tests/nodedevxml2xmltest.c
+++ b/tests/nodedevxml2xmltest.c
@@ -29,7 +29,7 @@ static int testCompareXMLToXMLFiles(const char *xml) {
if (virtTestLoadFile(xml, &xmlPtr, MAX_FILE) < 0)
goto fail;
- if (!(dev = virNodeDeviceDefParseString(NULL, xmlData)))
+ if (!(dev = virNodeDeviceDefParseString(NULL, xmlData, EXISTING_DEVICE)))
goto fail;
if (!(actual = virNodeDeviceDefFormat(NULL, dev)))
--
1.6.0.6
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