Signed-off-by: Pavel Hrdina <phrdina@xxxxxxxxxx>
---
src/qemu/qemu_block.c | 197 +++++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_block.h | 9 ++
src/qemu/qemu_driver.c | 181 +------------------------------------
3 files changed, 207 insertions(+), 180 deletions(-)
diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c
index b82e3311e1..c0c4088cbf 100644
--- a/src/qemu/qemu_block.c
+++ b/src/qemu/qemu_block.c
@@ -3201,3 +3201,200 @@ qemuBlockExportAddNBD(virDomainObj *vm,
return qemuMonitorBlockExportAdd(priv->mon, &nbdprops);
}
+
+
+int
+qemuBlockCommit(virDomainObj *vm,
+ virQEMUDriver *driver,
+ const char *path,
+ const char *base,
+ const char *top,
+ unsigned long bandwidth,
+ unsigned int flags)
+{
+ qemuDomainObjPrivate *priv = vm->privateData;
+ int rc = -1;
+ virDomainDiskDef *disk = NULL;
+ virStorageSource *topSource;
+ virStorageSource *baseSource = NULL;
+ virStorageSource *top_parent = NULL;
+ bool clean_access = false;
+ g_autofree char *backingPath = NULL;
+ qemuBlockJobData *job = NULL;
+ g_autoptr(virStorageSource) mirror = NULL;
+
+ if (virDomainObjCheckActive(vm) < 0)
+ return -1;
+
+ /* Convert bandwidth MiB to bytes, if necessary */
+ if (!(flags & VIR_DOMAIN_BLOCK_COMMIT_BANDWIDTH_BYTES)) {
+ if (bandwidth > LLONG_MAX >> 20) {
+ virReportError(VIR_ERR_OVERFLOW,
+ _("bandwidth must be less than %llu"),
+ LLONG_MAX >> 20);
+ return -1;
+ }
+ bandwidth <<= 20;
+ }
+
+ if (!(disk = qemuDomainDiskByName(vm->def, path)))
+ return -1;
+
+ if (!qemuDomainDiskBlockJobIsSupported(disk))
+ return -1;
+
+ if (virStorageSourceIsEmpty(disk->src)) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("disk %s has no source file to be committed"),
+ disk->dst);
+ return -1;
+ }
+
+ if (qemuDomainDiskBlockJobIsActive(disk))
+ return -1;
+
+ if (qemuDomainSupportsCheckpointsBlockjobs(vm) < 0)
+ return -1;
+
+ if (!top || STREQ(top, disk->dst))
+ topSource = disk->src;
+ else if (!(topSource = virStorageSourceChainLookup(disk->src, NULL, top,
+ disk->dst, &top_parent)))
+ return -1;
+
+ if (topSource == disk->src) {
+ /* XXX Should we auto-pivot when COMMIT_ACTIVE is not specified? */
+ if (!(flags & VIR_DOMAIN_BLOCK_COMMIT_ACTIVE)) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ _("commit of '%s' active layer requires active flag"),
+ disk->dst);
+ return -1;
+ }
+ } else if (flags & VIR_DOMAIN_BLOCK_COMMIT_ACTIVE) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ _("active commit requested but '%s' is not active"),
+ topSource->path);
+ return -1;
+ }
+
+ if (!virStorageSourceHasBacking(topSource)) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ _("top '%s' in chain for '%s' has no backing file"),
+ topSource->path, path);
+ return -1;
+ }
+
+ if (!base && (flags & VIR_DOMAIN_BLOCK_COMMIT_SHALLOW))
+ baseSource = topSource->backingStore;
+ else if (!(baseSource = virStorageSourceChainLookup(disk->src, topSource,
+ base, disk->dst, NULL)))
+ return -1;
+
+ if ((flags & VIR_DOMAIN_BLOCK_COMMIT_SHALLOW) &&
+ baseSource != topSource->backingStore) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ _("base '%s' is not immediately below '%s' in chain "
+ "for '%s'"),
+ base, topSource->path, path);
+ return -1;
+ }
+
+ /* For an active commit, clone enough of the base to act as the mirror */
+ if (topSource == disk->src) {
+ if (!(mirror = virStorageSourceCopy(baseSource, false)))
+ return -1;
+ if (virStorageSourceInitChainElement(mirror,
+ disk->src,
+ true) < 0)
+ return -1;
+ }
+
+ if (flags & VIR_DOMAIN_BLOCK_COMMIT_RELATIVE &&
+ topSource != disk->src) {
+ if (top_parent &&
+ qemuBlockUpdateRelativeBacking(vm, top_parent, disk->src) < 0)
+ return -1;
+
+ if (virStorageSourceGetRelativeBackingPath(topSource, baseSource,
+ &backingPath) < 0)
+ return -1;
+
+ if (!backingPath) {
+ virReportError(VIR_ERR_OPERATION_INVALID, "%s",
+ _("can't keep relative backing relationship"));
+ return -1;
+ }
+ }
+
+ /* For the commit to succeed, we must allow qemu to open both the
+ * 'base' image and the parent of 'top' as read/write; 'top' might
+ * not have a parent, or might already be read-write. XXX It
+ * would also be nice to revert 'base' to read-only, as well as
+ * revoke access to files removed from the chain, when the commit
+ * operation succeeds, but doing that requires tracking the
+ * operation in XML across libvirtd restarts. */
+ clean_access = true;
+ if (qemuDomainStorageSourceAccessAllow(driver, vm, baseSource,
+ false, false, false) < 0)
+ goto error;
+
+ if (top_parent && top_parent != disk->src) {
+ /* While top_parent is topmost image, we don't need to remember its
+ * owner as it will be overwritten upon finishing the commit. Hence,
+ * pass chainTop = false. */
+ if (qemuDomainStorageSourceAccessAllow(driver, vm, top_parent,
+ false, false, false) < 0)
+ goto error;
+ }
+
+ if (!(job = qemuBlockJobDiskNewCommit(vm, disk, top_parent, topSource,
+ baseSource,
+ flags & VIR_DOMAIN_BLOCK_COMMIT_DELETE,
+ flags)))
+ goto error;
+
+ disk->mirrorState = VIR_DOMAIN_DISK_MIRROR_STATE_NONE;
+
+ if (!backingPath && top_parent &&
+ !(backingPath = qemuBlockGetBackingStoreString(baseSource, false)))
+ goto error;
+
+ qemuDomainObjEnterMonitor(vm);
+
+ rc = qemuMonitorBlockCommit(priv->mon,
+ qemuDomainDiskGetTopNodename(disk),
+ job->name,
+ topSource->nodeformat,
+ baseSource->nodeformat,
+ backingPath, bandwidth);
+
+ qemuDomainObjExitMonitor(vm);
+
+ if (rc < 0)
+ goto error;
+
+ if (mirror) {
+ disk->mirror = g_steal_pointer(&mirror);
+ disk->mirrorJob = VIR_DOMAIN_BLOCK_JOB_TYPE_ACTIVE_COMMIT;
+ }
+ qemuBlockJobStarted(job, vm);
+
+ return 0;
+
+ error:
+ if (clean_access) {
+ virErrorPtr orig_err;
+ virErrorPreserveLast(&orig_err);
+ /* Revert access to read-only, if possible. */
+ qemuDomainStorageSourceAccessAllow(driver, vm, baseSource,
+ true, false, false);
+ if (top_parent && top_parent != disk->src)
+ qemuDomainStorageSourceAccessAllow(driver, vm, top_parent,
+ true, false, false);
+
+ virErrorRestore(&orig_err);
+ }
+ qemuBlockJobStartupFinalize(vm, job);
+
+ return -1;
+}
diff --git a/src/qemu/qemu_block.h b/src/qemu/qemu_block.h
index 8a3a10344e..be81ec3c7f 100644
--- a/src/qemu/qemu_block.h
+++ b/src/qemu/qemu_block.h
@@ -276,3 +276,12 @@ qemuBlockExportAddNBD(virDomainObj *vm,
const char *exportname,
bool writable,
const char *bitmap);
+
+int
+qemuBlockCommit(virDomainObj *vm,
+ virQEMUDriver *driver,
+ const char *path,
+ const char *base,
+ const char *top,
+ unsigned long bandwidth,
+ unsigned int flags);
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 707f4cc1bb..d353b6df93 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -15375,18 +15375,8 @@ qemuDomainBlockCommit(virDomainPtr dom,
unsigned int flags)
{
virQEMUDriver *driver = dom->conn->privateData;
- qemuDomainObjPrivate *priv;
virDomainObj *vm = NULL;
int ret = -1;
- virDomainDiskDef *disk = NULL;
- virStorageSource *topSource;
- virStorageSource *baseSource = NULL;
- virStorageSource *top_parent = NULL;
- bool clean_access = false;
- g_autofree char *backingPath = NULL;
- unsigned long long speed = bandwidth;
- qemuBlockJobData *job = NULL;
- g_autoptr(virStorageSource) mirror = NULL;
virCheckFlags(VIR_DOMAIN_BLOCK_COMMIT_SHALLOW |
VIR_DOMAIN_BLOCK_COMMIT_ACTIVE |
@@ -15396,7 +15386,6 @@ qemuDomainBlockCommit(virDomainPtr dom,
if (!(vm = qemuDomainObjFromDomain(dom)))
goto cleanup;
- priv = vm->privateData;
if (virDomainBlockCommitEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
@@ -15404,176 +15393,8 @@ qemuDomainBlockCommit(virDomainPtr dom,
if (qemuDomainObjBeginJob(vm, VIR_JOB_MODIFY) < 0)
goto cleanup;
- if (virDomainObjCheckActive(vm) < 0)
- goto endjob;
+ ret = qemuBlockCommit(vm, driver, path, base, top, bandwidth, flags);
- /* Convert bandwidth MiB to bytes, if necessary */
- if (!(flags & VIR_DOMAIN_BLOCK_COMMIT_BANDWIDTH_BYTES)) {
- if (speed > LLONG_MAX >> 20) {
- virReportError(VIR_ERR_OVERFLOW,
- _("bandwidth must be less than %llu"),
- LLONG_MAX >> 20);
- goto endjob;
- }
- speed <<= 20;
- }
-
- if (!(disk = qemuDomainDiskByName(vm->def, path)))
- goto endjob;
-
- if (!qemuDomainDiskBlockJobIsSupported(disk))
- goto endjob;
-
- if (virStorageSourceIsEmpty(disk->src)) {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
- _("disk %s has no source file to be committed"),
- disk->dst);
- goto endjob;
- }
-
- if (qemuDomainDiskBlockJobIsActive(disk))
- goto endjob;
-
- if (qemuDomainSupportsCheckpointsBlockjobs(vm) < 0)
- goto endjob;
-
- if (!top || STREQ(top, disk->dst))
- topSource = disk->src;
- else if (!(topSource = virStorageSourceChainLookup(disk->src, NULL, top,
- disk->dst, &top_parent)))
- goto endjob;
-
- if (topSource == disk->src) {
- /* XXX Should we auto-pivot when COMMIT_ACTIVE is not specified? */
- if (!(flags & VIR_DOMAIN_BLOCK_COMMIT_ACTIVE)) {
- virReportError(VIR_ERR_INVALID_ARG,
- _("commit of '%s' active layer requires active flag"),
- disk->dst);
- goto endjob;
- }
- } else if (flags & VIR_DOMAIN_BLOCK_COMMIT_ACTIVE) {
- virReportError(VIR_ERR_INVALID_ARG,
- _("active commit requested but '%s' is not active"),
- topSource->path);
- goto endjob;
- }
-
- if (!virStorageSourceHasBacking(topSource)) {
- virReportError(VIR_ERR_INVALID_ARG,
- _("top '%s' in chain for '%s' has no backing file"),
- topSource->path, path);
- goto endjob;
- }
-
- if (!base && (flags & VIR_DOMAIN_BLOCK_COMMIT_SHALLOW))
- baseSource = topSource->backingStore;
- else if (!(baseSource = virStorageSourceChainLookup(disk->src, topSource,
- base, disk->dst, NULL)))
- goto endjob;
-
- if ((flags & VIR_DOMAIN_BLOCK_COMMIT_SHALLOW) &&
- baseSource != topSource->backingStore) {
- virReportError(VIR_ERR_INVALID_ARG,
- _("base '%s' is not immediately below '%s' in chain "
- "for '%s'"),
- base, topSource->path, path);
- goto endjob;
- }
-
- /* For an active commit, clone enough of the base to act as the mirror */
- if (topSource == disk->src) {
- if (!(mirror = virStorageSourceCopy(baseSource, false)))
- goto endjob;
- if (virStorageSourceInitChainElement(mirror,
- disk->src,
- true) < 0)
- goto endjob;
- }
-
- if (flags & VIR_DOMAIN_BLOCK_COMMIT_RELATIVE &&
- topSource != disk->src) {
- if (top_parent &&
- qemuBlockUpdateRelativeBacking(vm, top_parent, disk->src) < 0)
- goto endjob;
-
- if (virStorageSourceGetRelativeBackingPath(topSource, baseSource,
- &backingPath) < 0)
- goto endjob;
-
- if (!backingPath) {
- virReportError(VIR_ERR_OPERATION_INVALID, "%s",
- _("can't keep relative backing relationship"));
- goto endjob;
- }
- }
-
- /* For the commit to succeed, we must allow qemu to open both the
- * 'base' image and the parent of 'top' as read/write; 'top' might
- * not have a parent, or might already be read-write. XXX It
- * would also be nice to revert 'base' to read-only, as well as
- * revoke access to files removed from the chain, when the commit
- * operation succeeds, but doing that requires tracking the
- * operation in XML across libvirtd restarts. */
- clean_access = true;
- if (qemuDomainStorageSourceAccessAllow(driver, vm, baseSource,
- false, false, false) < 0)
- goto endjob;
-
- if (top_parent && top_parent != disk->src) {
- /* While top_parent is topmost image, we don't need to remember its
- * owner as it will be overwritten upon finishing the commit. Hence,
- * pass chainTop = false. */
- if (qemuDomainStorageSourceAccessAllow(driver, vm, top_parent,
- false, false, false) < 0)
- goto endjob;
- }
-
- if (!(job = qemuBlockJobDiskNewCommit(vm, disk, top_parent, topSource,
- baseSource,
- flags & VIR_DOMAIN_BLOCK_COMMIT_DELETE,
- flags)))
- goto endjob;
-
- disk->mirrorState = VIR_DOMAIN_DISK_MIRROR_STATE_NONE;
-
- if (!backingPath && top_parent &&
- !(backingPath = qemuBlockGetBackingStoreString(baseSource, false)))
- goto endjob;
-
- qemuDomainObjEnterMonitor(vm);
-
- ret = qemuMonitorBlockCommit(priv->mon,
- qemuDomainDiskGetTopNodename(disk),
- job->name,
- topSource->nodeformat,
- baseSource->nodeformat,
- backingPath, speed);
-
- qemuDomainObjExitMonitor(vm);
-
- if (ret < 0)
- goto endjob;
-
- if (mirror) {
- disk->mirror = g_steal_pointer(&mirror);
- disk->mirrorJob = VIR_DOMAIN_BLOCK_JOB_TYPE_ACTIVE_COMMIT;
- }
- qemuBlockJobStarted(job, vm);
-
- endjob:
- if (ret < 0 && clean_access) {
- virErrorPtr orig_err;
- virErrorPreserveLast(&orig_err);
- /* Revert access to read-only, if possible. */
- qemuDomainStorageSourceAccessAllow(driver, vm, baseSource,
- true, false, false);
- if (top_parent && top_parent != disk->src)
- qemuDomainStorageSourceAccessAllow(driver, vm, top_parent,
- true, false, false);
-
- virErrorRestore(&orig_err);
- }
- qemuBlockJobStartupFinalize(vm, job);
qemuDomainObjEndJob(vm);
cleanup:
--
2.37.2
