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locking: Add APIs to lock individual image files

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Add helper APIs to manage individual image files rather than disks. To
simplify the addition some parts of the code were refactored in this
patch.
This commit is contained in:
Peter Krempa 2014-06-23 15:16:46 +02:00
parent 1ba14d6df2
commit 68f0deb0dc
3 changed files with 52 additions and 23 deletions
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2
src/libvirt_private.syms
View File

@ -862,6 +862,8 @@ virRegisterStorageDriver;
# locking/domain_lock.h
virDomainLockDiskAttach;
virDomainLockDiskDetach;
virDomainLockImageAttach;
virDomainLockImageDetach;
virDomainLockLeaseAttach;
virDomainLockLeaseDetach;
virDomainLockProcessInquire;

65
src/locking/domain_lock.c
View File

@ -68,14 +68,13 @@ static int virDomainLockManagerAddLease(virLockManagerPtr lock,
}
static int virDomainLockManagerAddDisk(virLockManagerPtr lock,
virDomainDiskDefPtr disk)
static int virDomainLockManagerAddImage(virLockManagerPtr lock,
virStorageSourcePtr src)
{
unsigned int diskFlags = 0;
const char *src = virDomainDiskGetSource(disk);
int type = virDomainDiskGetType(disk);
int type = virStorageSourceGetActualType(src);
if (!src)
if (!src->path)
return 0;
if (!(type == VIR_STORAGE_TYPE_BLOCK ||
@ -83,24 +82,25 @@ static int virDomainLockManagerAddDisk(virLockManagerPtr lock,
type == VIR_STORAGE_TYPE_DIR))
return 0;
if (disk->src->readonly)
if (src->readonly)
diskFlags |= VIR_LOCK_MANAGER_RESOURCE_READONLY;
if (disk->src->shared)
if (src->shared)
diskFlags |= VIR_LOCK_MANAGER_RESOURCE_SHARED;
VIR_DEBUG("Add disk %s", src);
VIR_DEBUG("Add disk %s", src->path);
if (virLockManagerAddResource(lock,
VIR_LOCK_MANAGER_RESOURCE_TYPE_DISK,
src,
src->path,
0,
NULL,
diskFlags) < 0) {
VIR_DEBUG("Failed add disk %s", src);
VIR_DEBUG("Failed add disk %s", src->path);
return -1;
}
return 0;
}
static virLockManagerPtr virDomainLockManagerNew(virLockManagerPluginPtr plugin,
const char *uri,
virDomainObjPtr dom,
@ -148,9 +148,12 @@ static virLockManagerPtr virDomainLockManagerNew(virLockManagerPluginPtr plugin,
goto error;
VIR_DEBUG("Adding disks");
for (i = 0; i < dom->def->ndisks; i++)
if (virDomainLockManagerAddDisk(lock, dom->def->disks[i]) < 0)
for (i = 0; i < dom->def->ndisks; i++) {
virDomainDiskDefPtr disk = dom->def->disks[i];
if (virDomainLockManagerAddImage(lock, disk->src) < 0)
goto error;
}
}
return lock;
@ -247,21 +250,20 @@ int virDomainLockProcessInquire(virLockManagerPluginPtr plugin,
}
int virDomainLockDiskAttach(virLockManagerPluginPtr plugin,
const char *uri,
virDomainObjPtr dom,
virDomainDiskDefPtr disk)
int virDomainLockImageAttach(virLockManagerPluginPtr plugin,
const char *uri,
virDomainObjPtr dom,
virStorageSourcePtr src)
{
virLockManagerPtr lock;
int ret = -1;
VIR_DEBUG("plugin=%p dom=%p disk=%p",
plugin, dom, disk);
VIR_DEBUG("plugin=%p dom=%p src=%p", plugin, dom, src);
if (!(lock = virDomainLockManagerNew(plugin, uri, dom, false)))
return -1;
if (virDomainLockManagerAddDisk(lock, disk) < 0)
if (virDomainLockManagerAddImage(lock, src) < 0)
goto cleanup;
if (virLockManagerAcquire(lock, NULL, 0,
@ -276,20 +278,29 @@ int virDomainLockDiskAttach(virLockManagerPluginPtr plugin,
return ret;
}
int virDomainLockDiskDetach(virLockManagerPluginPtr plugin,
int virDomainLockDiskAttach(virLockManagerPluginPtr plugin,
const char *uri,
virDomainObjPtr dom,
virDomainDiskDefPtr disk)
{
return virDomainLockImageAttach(plugin, uri, dom, disk->src);
}
int virDomainLockImageDetach(virLockManagerPluginPtr plugin,
virDomainObjPtr dom,
virStorageSourcePtr src)
{
virLockManagerPtr lock;
int ret = -1;
VIR_DEBUG("plugin=%p dom=%p disk=%p",
plugin, dom, disk);
VIR_DEBUG("plugin=%p dom=%p src=%p", plugin, dom, src);
if (!(lock = virDomainLockManagerNew(plugin, NULL, dom, false)))
return -1;
if (virDomainLockManagerAddDisk(lock, disk) < 0)
if (virDomainLockManagerAddImage(lock, src) < 0)
goto cleanup;
if (virLockManagerRelease(lock, NULL, 0) < 0)
@ -304,6 +315,14 @@ int virDomainLockDiskDetach(virLockManagerPluginPtr plugin,
}
int virDomainLockDiskDetach(virLockManagerPluginPtr plugin,
virDomainObjPtr dom,
virDomainDiskDefPtr disk)
{
return virDomainLockImageDetach(plugin, dom, disk->src);
}
int virDomainLockLeaseAttach(virLockManagerPluginPtr plugin,
const char *uri,
virDomainObjPtr dom,

8
src/locking/domain_lock.h
View File

@ -50,6 +50,14 @@ int virDomainLockDiskDetach(virLockManagerPluginPtr plugin,
virDomainObjPtr dom,
virDomainDiskDefPtr disk);
int virDomainLockImageAttach(virLockManagerPluginPtr plugin,
const char *uri,
virDomainObjPtr dom,
virStorageSourcePtr src);
int virDomainLockImageDetach(virLockManagerPluginPtr plugin,
virDomainObjPtr dom,
virStorageSourcePtr src);
int virDomainLockLeaseAttach(virLockManagerPluginPtr plugin,
const char *uri,
virDomainObjPtr dom,