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virsh-volume: add support for --reflink
Add support for --reflink to the virsh 'vol-create-from' and 'vol-clone' commands to signify usage of the VIR_STORAGE_VOL_CREATE_REFLINK flag in the ensuing virStorageVolCreateXMLFrom API call. Updated the man page to describe the new flag. Signed-off-by: Chen Hanxiao <chenhanxiao@cn.fujitsu.com>
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@ -204,6 +204,7 @@ cmdVolCreateAs(vshControl *ctl, const vshCmd *cmd)
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if (vshCommandOptBool(cmd, "prealloc-metadata"))
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flags |= VIR_STORAGE_VOL_CREATE_PREALLOC_METADATA;
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if (!(pool = vshCommandOptPool(ctl, cmd, "pool", NULL)))
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return false;
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@ -378,6 +379,7 @@ cmdVolCreate(vshControl *ctl, const vshCmd *cmd)
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if (vshCommandOptBool(cmd, "prealloc-metadata"))
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flags |= VIR_STORAGE_VOL_CREATE_PREALLOC_METADATA;
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if (!(pool = vshCommandOptPool(ctl, cmd, "pool", NULL)))
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return false;
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@ -441,6 +443,10 @@ static const vshCmdOptDef opts_vol_create_from[] = {
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.type = VSH_OT_BOOL,
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.help = N_("preallocate metadata (for qcow2 instead of full allocation)")
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},
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{.name = "reflink",
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.type = VSH_OT_BOOL,
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.help = N_("use btrfs COW lightweight copy")
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},
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{.name = NULL}
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};
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@ -460,6 +466,9 @@ cmdVolCreateFrom(vshControl *ctl, const vshCmd *cmd)
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if (vshCommandOptBool(cmd, "prealloc-metadata"))
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flags |= VIR_STORAGE_VOL_CREATE_PREALLOC_METADATA;
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if (vshCommandOptBool(cmd, "reflink"))
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flags |= VIR_STORAGE_VOL_CREATE_REFLINK;
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if (vshCommandOptStringReq(ctl, cmd, "file", &from) < 0)
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goto cleanup;
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@ -554,6 +563,10 @@ static const vshCmdOptDef opts_vol_clone[] = {
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.type = VSH_OT_BOOL,
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.help = N_("preallocate metadata (for qcow2 instead of full allocation)")
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},
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{.name = "reflink",
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.type = VSH_OT_BOOL,
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.help = N_("use btrfs COW lightweight copy")
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},
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{.name = NULL}
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};
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@ -574,6 +587,9 @@ cmdVolClone(vshControl *ctl, const vshCmd *cmd)
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if (vshCommandOptBool(cmd, "prealloc-metadata"))
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flags |= VIR_STORAGE_VOL_CREATE_PREALLOC_METADATA;
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if (vshCommandOptBool(cmd, "reflink"))
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flags |= VIR_STORAGE_VOL_CREATE_REFLINK;
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origpool = virStoragePoolLookupByVolume(origvol);
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if (!origpool) {
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vshError(ctl, "%s", _("failed to get parent pool"));
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@ -3160,6 +3160,7 @@ B<Example>
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=item B<vol-create-from> I<pool-or-uuid> I<FILE> [I<--inputpool>
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I<pool-or-uuid>] I<vol-name-or-key-or-path> [I<--prealloc-metadata>]
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[I<--reflink>]
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Create a volume, using another volume as input.
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I<pool-or-uuid> is the name or UUID of the storage pool to create the volume in.
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@ -3171,6 +3172,9 @@ I<vol-name-or-key-or-path> is the name or key or path of the source volume.
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support full allocation). This option creates a sparse image file with metadata,
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resulting in higher performance compared to images with no preallocation and
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only slightly higher initial disk space usage.
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When I<--reflink> is specified, perform a COW lightweight copy,
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where the data blocks are copied only when modified.
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If this is not possible, the copy fails.
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=item B<vol-create-as> I<pool-or-uuid> I<name> I<capacity>
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[I<--allocation> I<size>] [I<--format> I<string>] [I<--backing-vol>
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@ -3205,7 +3209,7 @@ resulting in higher performance compared to images with no preallocation and
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only slightly higher initial disk space usage.
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=item B<vol-clone> [I<--pool> I<pool-or-uuid>] I<vol-name-or-key-or-path>
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I<name> [I<--prealloc-metadata>]
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I<name> [I<--prealloc-metadata>] [I<--reflink>]
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Clone an existing volume. Less powerful, but easier to type, version of
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B<vol-create-from>.
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@ -3217,6 +3221,9 @@ I<name> is the name of the new volume.
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support full allocation). This option creates a sparse image file with metadata,
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resulting in higher performance compared to images with no preallocation and
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only slightly higher initial disk space usage.
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When I<--reflink> is specified, perform a COW lightweight copy,
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where the data blocks are copied only when modified.
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If this is not possible, the copy fails.
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=item B<vol-delete> [I<--pool> I<pool-or-uuid>] I<vol-name-or-key-or-path>
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