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qemu: shared: Split out insertion code to the shared device list

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To allow reuse split the code into a separate function and refactor it.
To update an existing entry there's no need to copy it first, just
update it inplace.
This commit is contained in:
Peter Krempa 2014-08-06 13:57:42 +02:00
parent b57ca1320c
commit f36a94f236
1 changed files with 44 additions and 37 deletions
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81
src/qemu/qemu_conf.c
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@ -949,6 +949,47 @@ qemuSharedDeviceEntryCopy(const qemuSharedDeviceEntry *entry)
return NULL;
}
static int
qemuSharedDeviceEntryInsert(virQEMUDriverPtr driver,
const char *key,
const char *name)
{
qemuSharedDeviceEntry *entry = NULL;
int ret = -1;
if ((entry = virHashLookup(driver->sharedDevices, key))) {
/* Nothing to do if the shared scsi host device is already
* recorded in the table.
*/
if (qemuSharedDeviceEntryDomainExists(entry, name, NULL)) {
ret = 0;
goto cleanup;
}
if (VIR_EXPAND_N(entry->domains, entry->ref, 1) < 0 ||
VIR_STRDUP(entry->domains[entry->ref - 1], name) < 0)
goto cleanup;
} else {
if (VIR_ALLOC(entry) < 0 ||
VIR_ALLOC_N(entry->domains, 1) < 0 ||
VIR_STRDUP(entry->domains[0], name) < 0)
goto cleanup;
entry->ref = 1;
if (virHashAddEntry(driver->sharedDevices, key, entry))
goto cleanup;
}
ret = 0;
cleanup:
qemuSharedDeviceEntryFree(entry, NULL);
return ret;
}
/* qemuAddSharedDevice:
* @driver: Pointer to qemu driver struct
* @dev: The device def
@ -963,8 +1004,6 @@ qemuAddSharedDevice(virQEMUDriverPtr driver,
virDomainDeviceDefPtr dev,
const char *name)
{
qemuSharedDeviceEntry *entry = NULL;
qemuSharedDeviceEntry *new_entry = NULL;
virDomainDiskDefPtr disk = NULL;
virDomainHostdevDefPtr hostdev = NULL;
char *dev_name = NULL;
@ -1016,43 +1055,11 @@ qemuAddSharedDevice(virQEMUDriverPtr driver,
goto cleanup;
}
if ((entry = virHashLookup(driver->sharedDevices, key))) {
/* Nothing to do if the shared scsi host device is already
* recorded in the table.
*/
if (qemuSharedDeviceEntryDomainExists(entry, name, NULL)) {
ret = 0;
goto cleanup;
}
if (!(new_entry = qemuSharedDeviceEntryCopy(entry)))
goto cleanup;
if (VIR_EXPAND_N(new_entry->domains, new_entry->ref, 1) < 0 ||
VIR_STRDUP(new_entry->domains[new_entry->ref - 1], name) < 0) {
qemuSharedDeviceEntryFree(new_entry, NULL);
goto cleanup;
}
if (virHashUpdateEntry(driver->sharedDevices, key, new_entry) < 0) {
qemuSharedDeviceEntryFree(new_entry, NULL);
goto cleanup;
}
} else {
if (VIR_ALLOC(entry) < 0 ||
VIR_ALLOC_N(entry->domains, 1) < 0 ||
VIR_STRDUP(entry->domains[0], name) < 0) {
qemuSharedDeviceEntryFree(entry, NULL);
goto cleanup;
}
entry->ref = 1;
if (virHashAddEntry(driver->sharedDevices, key, entry))
goto cleanup;
}
if (qemuSharedDeviceEntryInsert(driver, key, name) < 0)
goto cleanup;
ret = 0;
cleanup:
qemuDriverUnlock(driver);
VIR_FREE(dev_name);