the "virsh nodedev-reattch" command could return successfully, but the pci device is still
bound to pci-stub driver. The reason is noddev-reattach trys to use the variables set by
nodedev-dettach commands. Becuase these variables is not persistent, this is not we expected.
the patch try to fix it.
---
src/util/pci.c | 74 +++++++++++++++++++------------------------------------
1 files changed, 26 insertions(+), 48 deletions(-)
diff --git a/src/util/pci.c b/src/util/pci.c
index 46a3a83..d345c3e 100644
--- a/src/util/pci.c
+++ b/src/util/pci.c
@@ -67,9 +67,6 @@ struct _pciDevice {
unsigned managed : 1;
/* used by reattach function */
- unsigned unbind_from_stub : 1;
- unsigned remove_slot : 1;
- unsigned reprobe : 1;
};
struct _pciDeviceList {
@@ -882,14 +879,23 @@ pciUnbindDeviceFromStub(pciDevice *dev, const char *driver)
if (pciDriverDir(&drvdir, driver) < 0)
goto cleanup;
- if (!dev->unbind_from_stub)
- goto remove_slot;
-
- /* If the device is bound to stub, unbind it.
- */
if (pciDeviceFile(&path, dev->name, "driver") < 0)
goto cleanup;
+ /* If the device is bound to a driver instead of pci-stub, do nothing.
+ */
+ if (virFileExists(path) && ! virFileLinkPointsTo(path, drvdir)){
+ result = 0;
+ goto cleanup;
+ }
+
+ /* If the device is not bound to any driver, reprobe it.
+ */
+ if (!virFileExists(path))
+ goto reprobe;
+
+ /* If the device is bound to stub, unbind it.
+ */
if (virFileExists(drvdir) && virFileLinkPointsTo(path, drvdir)) {
if (pciDriverFile(&path, driver, "unbind") < 0) {
goto cleanup;
@@ -902,11 +908,6 @@ pciUnbindDeviceFromStub(pciDevice *dev, const char *driver)
goto cleanup;
}
}
- dev->unbind_from_stub = 0;
-
-remove_slot:
- if (!dev->remove_slot)
- goto reprobe;
/* Xen's pciback.ko wants you to use remove_slot on the specific device */
if (pciDriverFile(&path, driver, "remove_slot") < 0) {
@@ -919,14 +920,8 @@ remove_slot:
dev->name, driver);
goto cleanup;
}
- dev->remove_slot = 0;
reprobe:
- if (!dev->reprobe) {
- result = 0;
- goto cleanup;
- }
-
/* Trigger a re-probe of the device is not in the stub's dynamic
* ID table. If the stub is available, but 'remove_id' isn't
* available, then re-probing would just cause the device to be
@@ -935,6 +930,12 @@ reprobe:
if (pciDriverFile(&path, driver, "remove_id") < 0) {
goto cleanup;
}
+
+ /* If the device is still in stub's dynamic ID table,remove it,
+ * otherwise, ignore the error.
+ */
+ if (virFileExists(path) && virFileWriteStr(path, dev->name, 0) < 0){
+ }
if (!virFileExists(drvdir) || virFileExists(path)) {
if (virFileWriteStr(PCI_SYSFS "drivers_probe", dev->name, 0) < 0) {
@@ -948,11 +949,6 @@ reprobe:
result = 0;
cleanup:
- /* do not do it again */
- dev->unbind_from_stub = 0;
- dev->remove_slot = 0;
- dev->reprobe = 0;
-
VIR_FREE(drvdir);
VIR_FREE(path);
@@ -966,7 +962,6 @@ pciBindDeviceToStub(pciDevice *dev, const char *driver)
int result = -1;
char *drvdir = NULL;
char *path = NULL;
- int reprobe = 0;
/* check whether the device is already bound to a driver */
if (pciDriverDir(&drvdir, driver) < 0 ||
@@ -980,7 +975,6 @@ pciBindDeviceToStub(pciDevice *dev, const char *driver)
result = 0;
goto cleanup;
}
- reprobe = 1;
}
/* Add the PCI device ID to the stub's dynamic ID table;
@@ -1011,8 +1005,7 @@ pciBindDeviceToStub(pciDevice *dev, const char *driver)
}
if (virFileLinkPointsTo(path, drvdir)) {
- dev->unbind_from_stub = 1;
- dev->remove_slot = 1;
+ result = 0;
goto remove_id;
}
@@ -1022,7 +1015,7 @@ pciBindDeviceToStub(pciDevice *dev, const char *driver)
* your root filesystem.
*/
if (pciDeviceFile(&path, dev->name, "driver/unbind") < 0) {
- goto cleanup;
+ goto remove_id;
}
if (virFileExists(path)) {
@@ -1030,9 +1023,8 @@ pciBindDeviceToStub(pciDevice *dev, const char *driver)
virReportSystemError(errno,
_("Failed to unbind PCI device '%s'"),
dev->name);
- goto cleanup;
+ goto remove_id;
}
- dev->reprobe = reprobe;
}
/* If the device isn't already bound to pci-stub, try binding it now.
@@ -1054,7 +1046,6 @@ pciBindDeviceToStub(pciDevice *dev, const char *driver)
dev->name, driver);
goto remove_id;
}
- dev->remove_slot = 1;
if (pciDriverFile(&path, driver, "bind") < 0) {
goto remove_id;
@@ -1066,20 +1057,15 @@ pciBindDeviceToStub(pciDevice *dev, const char *driver)
dev->name, driver);
goto remove_id;
}
- dev->unbind_from_stub = 1;
}
+ result = 0;
remove_id:
/* If 'remove_id' exists, remove the device id from pci-stub's dynamic
* ID table so that 'drivers_probe' works below.
*/
if (pciDriverFile(&path, driver, "remove_id") < 0) {
- /* We do not remove PCI ID from pci-stub, and we cannot reprobe it */
- if (dev->reprobe) {
- VIR_WARN("Could not remove PCI ID '%s' from %s, and the device "
- "cannot be probed again.", dev->id, driver);
- }
- dev->reprobe = 0;
+ result = -1;
goto cleanup;
}
@@ -1087,18 +1073,10 @@ remove_id:
virReportSystemError(errno,
_("Failed to remove PCI ID '%s' from %s"),
dev->id, driver);
-
- /* remove PCI ID from pci-stub failed, and we cannot reprobe it */
- if (dev->reprobe) {
- VIR_WARN("Failed to remove PCI ID '%s' from %s, and the device "
- "cannot be probed again.", dev->id, driver);
- }
- dev->reprobe = 0;
+ result = -1;
goto cleanup;
}
- result = 0;
-
cleanup:
VIR_FREE(drvdir);
VIR_FREE(path);
--
1.7.1
--
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