[libvirt] [PATCH 2/6] Add helper APIs for iterating over PCI device resource files
* src/pci.h, src/pci.c: Helper for iterating over PCI device
resource files
* src/libvirt_private.syms: Export pciDeviceFileIterate
---
src/libvirt_private.syms | 2 +
src/pci.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++
src/pci.h | 9 +++++++-
3 files changed, 62 insertions(+), 1 deletions(-)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 67f7aa2..93d55ca 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -291,6 +291,8 @@ pciDeviceListNew;
pciDeviceListFree;
pciDeviceListAdd;
pciDeviceListDel;
+pciDeviceFileIterate;
+
# qparams.h
qparam_get_query;
diff --git a/src/pci.c b/src/pci.c
index 96e5d6d..feaa6e8 100644
--- a/src/pci.c
+++ b/src/pci.c
@@ -1022,3 +1022,55 @@ pciDeviceListFind(pciDeviceList *list, pciDevice *dev)
return list->devs[i];
return NULL;
}
+
+
+int pciDeviceFileIterate(virConnectPtr conn,
+ pciDevice *dev,
+ pciDeviceFileActor actor,
+ void *opaque)
+{
+ char *pcidir = NULL;
+ char *file = NULL;
+ DIR *dir = NULL;
+ int ret = -1;
+ struct dirent *ent;
+
+ if (virAsprintf(&pcidir, "/sys/bus/pci/devices/%04x:%02x:%02x.%x",
+ dev->domain, dev->bus, dev->slot, dev->function) < 0)
{
+ virReportOOMError(conn);
+ goto cleanup;
+ }
+
+ if (!(dir = opendir(pcidir))) {
+ virReportSystemError(conn, errno,
+ _("cannot open %s"), pcidir);
+ goto cleanup;
+ }
+
+ while ((ent = readdir(dir)) != NULL) {
+ /* Device assignment requires:
+ * $PCIDIR/config, $PCIDIR/resource, $PCIDIR/resourceNNN, $PCIDIR/rom
+ */
+ if (STREQ(ent->d_name, "config") ||
+ STRPREFIX(ent->d_name, "resource") ||
+ STREQ(ent->d_name, "rom")) {
+ if (virAsprintf(&file, "%s/%s", pcidir, ent->d_name) < 0)
{
+ virReportOOMError(conn);
+ goto cleanup;
+ }
+ if ((actor)(conn, dev, file, opaque) < 0)
+ goto cleanup;
+
+ VIR_FREE(file);
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ if (dir)
+ closedir(dir);
+ VIR_FREE(file);
+ VIR_FREE(pcidir);
+ return ret;
+}
diff --git a/src/pci.h b/src/pci.h
index 685b0af..d23ee0e 100644
--- a/src/pci.h
+++ b/src/pci.h
@@ -22,7 +22,6 @@
#ifndef __VIR_PCI_H__
#define __VIR_PCI_H__
-#include <config.h>
#include "internal.h"
typedef struct _pciDevice pciDevice;
@@ -62,4 +61,12 @@ void pciDeviceListDel (virConnectPtr conn,
pciDevice * pciDeviceListFind (pciDeviceList *list,
pciDevice *dev);
+typedef int (*pciDeviceFileActor)(virConnectPtr conn, pciDevice *dev,
+ const char *path, void *opaque);
+
+int pciDeviceFileIterate(virConnectPtr conn,
+ pciDevice *dev,
+ pciDeviceFileActor actor,
+ void *opaque);
+
#endif /* __VIR_PCI_H__ */
--
1.6.2.5