9:05 p.m.
v2: add man page patch
Chen Hanxiao (2):
virsh-volume: add support for --reflink
man: add --reflink man page of virsh
tools/virsh-volume.c | 16 ++++++++++++++++
tools/virsh.pod | 9 ++++++++-
2 files changed, 24 insertions(+), 1 deletion(-)
--
2.1.0
9:05 p.m.
New subject: [libvirt] [PATCH v2 1/2] virsh-volume: add support for --reflink
add support for --reflink to specify
VIR_STORAGE_VOL_CREATE_REFLINK flag.
Signed-off-by: Chen Hanxiao <chenhanxiao(a)cn.fujitsu.com>
---
tools/virsh-volume.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/tools/virsh-volume.c b/tools/virsh-volume.c
index d585ee2..db94154 100644
--- a/tools/virsh-volume.c
+++ b/tools/virsh-volume.c
@@ -204,6 +204,7 @@ cmdVolCreateAs(vshControl *ctl, const vshCmd *cmd)
if (vshCommandOptBool(cmd, "prealloc-metadata"))
flags |= VIR_STORAGE_VOL_CREATE_PREALLOC_METADATA;
+
if (!(pool = vshCommandOptPool(ctl, cmd, "pool", NULL)))
return false;
@@ -378,6 +379,7 @@ cmdVolCreate(vshControl *ctl, const vshCmd *cmd)
if (vshCommandOptBool(cmd, "prealloc-metadata"))
flags |= VIR_STORAGE_VOL_CREATE_PREALLOC_METADATA;
+
if (!(pool = vshCommandOptPool(ctl, cmd, "pool", NULL)))
return false;
@@ -441,6 +443,10 @@ static const vshCmdOptDef opts_vol_create_from[] = {
.type = VSH_OT_BOOL,
.help = N_("preallocate metadata (for qcow2 instead of full allocation)")
},
+ {.name = "reflink",
+ .type = VSH_OT_BOOL,
+ .help = N_("use btrfs COW lightweight copy")
+ },
{.name = NULL}
};
@@ -460,6 +466,9 @@ cmdVolCreateFrom(vshControl *ctl, const vshCmd *cmd)
if (vshCommandOptBool(cmd, "prealloc-metadata"))
flags |= VIR_STORAGE_VOL_CREATE_PREALLOC_METADATA;
+ if (vshCommandOptBool(cmd, "reflink"))
+ flags |= VIR_STORAGE_VOL_CREATE_REFLINK;
+
if (vshCommandOptStringReq(ctl, cmd, "file", &from) < 0)
goto cleanup;
@@ -554,6 +563,10 @@ static const vshCmdOptDef opts_vol_clone[] = {
.type = VSH_OT_BOOL,
.help = N_("preallocate metadata (for qcow2 instead of full allocation)")
},
+ {.name = "reflink",
+ .type = VSH_OT_BOOL,
+ .help = N_("use btrfs COW lightweight copy")
+ },
{.name = NULL}
};
@@ -574,6 +587,9 @@ cmdVolClone(vshControl *ctl, const vshCmd *cmd)
if (vshCommandOptBool(cmd, "prealloc-metadata"))
flags |= VIR_STORAGE_VOL_CREATE_PREALLOC_METADATA;
+ if (vshCommandOptBool(cmd, "reflink"))
+ flags |= VIR_STORAGE_VOL_CREATE_REFLINK;
+
origpool = virStoragePoolLookupByVolume(origvol);
if (!origpool) {
vshError(ctl, "%s", _("failed to get parent pool"));
--
2.1.0
9:05 p.m.
New subject: [libvirt] [PATCH v2 2/2] man: add --reflink man page of virsh
Signed-off-by: Chen Hanxiao <chenhanxiao(a)cn.fujitsu.com>
---
tools/virsh.pod | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/tools/virsh.pod b/tools/virsh.pod
index 804458e..c0bd99b 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -3160,6 +3160,7 @@ B<Example>
=item B<vol-create-from> I<pool-or-uuid> I<FILE> [I<--inputpool>
I<pool-or-uuid>] I<vol-name-or-key-or-path> [I<--prealloc-metadata>]
+[I<--reflink>]
Create a volume, using another volume as input.
I<pool-or-uuid> is the name or UUID of the storage pool to create the volume in.
@@ -3171,6 +3172,9 @@ I<vol-name-or-key-or-path> is the name or key or path of the
source volume.
support full allocation). This option creates a sparse image file with metadata,
resulting in higher performance compared to images with no preallocation and
only slightly higher initial disk space usage.
+[I<--reflink>] When --reflink is specified, perform a COW lightweight copy,
+where the data blocks are copied only when modified.
+If this is not possible, the copy fails.
=item B<vol-create-as> I<pool-or-uuid> I<name> I<capacity>
[I<--allocation> I<size>] [I<--format> I<string>]
[I<--backing-vol>
@@ -3205,7 +3209,7 @@ resulting in higher performance compared to images with no
preallocation and
only slightly higher initial disk space usage.
=item B<vol-clone> [I<--pool> I<pool-or-uuid>]
I<vol-name-or-key-or-path>
-I<name> [I<--prealloc-metadata>]
+I<name> [I<--prealloc-metadata>] [I<--reflink>]
Clone an existing volume. Less powerful, but easier to type, version of
B<vol-create-from>.
@@ -3217,6 +3221,9 @@ I<name> is the name of the new volume.
support full allocation). This option creates a sparse image file with metadata,
resulting in higher performance compared to images with no preallocation and
only slightly higher initial disk space usage.
+[I<--reflink>] When --reflink is specified, perform a COW lightweight copy,
+where the data blocks are copied only when modified.
+If this is not possible, the copy fails.
=item B<vol-delete> [I<--pool> I<pool-or-uuid>]
I<vol-name-or-key-or-path>
--
2.1.0
10:38 a.m.
On 02/02/2015 10:05 PM, Chen Hanxiao wrote:
v2: add man page patch
Chen Hanxiao (2):
virsh-volume: add support for --reflink
man: add --reflink man page of virsh
tools/virsh-volume.c | 16 ++++++++++++++++
tools/virsh.pod | 9 ++++++++-
2 files changed, 24 insertions(+), 1 deletion(-)
I combined the two patches, cleaned up the verbiage a bit, and pushed.
John
7:50 p.m.
-----Original Message-----
From: John Ferlan [mailto:jferlan@redhat.com]
Sent: Wednesday, February 04, 2015 12:39 AM
To: Chen, Hanxiao/陈 晗霄; libvir-list(a)redhat.com
Subject: Re: [libvirt] [PATCH v2 0/2] add support for --reflink to virsh
On 02/02/2015 10:05 PM, Chen Hanxiao wrote:
> v2: add man page patch
>
> Chen Hanxiao (2):
> virsh-volume: add support for --reflink
> man: add --reflink man page of virsh
>
> tools/virsh-volume.c | 16 ++++++++++++++++
> tools/virsh.pod | 9 ++++++++-
> 2 files changed, 24 insertions(+), 1 deletion(-)
>
I combined the two patches, cleaned up the verbiage a bit, and pushed.
Thanks for your help.
Regards,
- Chen
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John Ferlan