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489fde76
编写于
1月 27, 2009
作者:
D
Daniel P. Berrange
浏览文件
操作
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电子邮件补丁
差异文件
Add support for copy-on-write storage volumes
上级
765bca14
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11 changed file
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ChangeLog
ChangeLog
+19
-0
docs/formatstorage.html
docs/formatstorage.html
+43
-2
docs/formatstorage.html.in
docs/formatstorage.html.in
+50
-2
src/libvirt_private.syms
src/libvirt_private.syms
+1
-0
src/storage_backend.c
src/storage_backend.c
+79
-51
src/storage_backend.h
src/storage_backend.h
+9
-4
src/storage_backend_fs.c
src/storage_backend_fs.c
+296
-41
src/storage_backend_iscsi.c
src/storage_backend_iscsi.c
+5
-1
src/storage_backend_logical.c
src/storage_backend_logical.c
+46
-22
src/storage_conf.c
src/storage_conf.c
+72
-29
src/storage_conf.h
src/storage_conf.h
+1
-0
未找到文件。
ChangeLog
浏览文件 @
489fde76
Tue Jan 27 18:17:07 GMT 2009 Daniel P. Berrange <berrange@redhat.com>
Support Copy-on-Write storage volumes
* docs/formatstorage.html.in: Add notes about backingStore
XML for storage volumes wanting copy-on-write (eg qcow,
LVM snapshots).
* src/libvirt_private.syms: Add virStorageVolFormatFileSystemTypeFromString
* src/storage_backend.c, src/storage_backend.h: Refactor the
virStorageBackendUpdateVolInfo* methods to allow re-use for
backingStore files
* src/storage_backend_fs.c: Extract backing store data out of
Cow, QCow, QCow2, and VMDK file formats. Allow creation of volumes
with a backing store
* src/storage_backend_logical.c: Extract information about master
volume for snapshots, and allow creation of snapshots.
* src/storage_backend_iscsi.c: Adapt to storage_backend.h changes
* src/storage_conf.h, src/storage_conf.c: Support new backingStore
XML element for COW file data
Tue Jan 27 16:27:07 +0100 2009 Jim Meyering <meyering@redhat.com>
* POTFILES.in: update: remove src/lxc_conf.c; Add src/bridge.c.
...
...
docs/formatstorage.html
浏览文件 @
489fde76
...
...
@@ -131,6 +131,8 @@
<a
href=
"#StorageVolFirst"
>
General metadata
</a>
</li><li>
<a
href=
"#StorageVolTarget"
>
Target elements
</a>
</li><li>
<a
href=
"#StorageVolBacking"
>
Backing store elements
</a>
</li></ul>
</li><li>
<a
href=
"#examples"
>
Example configuration
</a>
...
...
@@ -328,14 +330,14 @@
...
<
target
>
<
path
>
/var/lib/virt/images/sparse.img
<
/path
>
<
format
>
qcow2
<
/format
>
<
permissions
>
<
owner
>
0744
<
/owner
>
<
group
>
0744
<
/group
>
<
mode
>
0744
<
/mode
>
<
label
>
virt_image_t
<
/label
>
<
/permissions
>
<
/target
>
<
/volume
>
</pre>
<
/target
>
</pre>
<dl><dt><code>
path
</code></dt><dd>
Provides the location at which the volume can be accessed on
the local filesystem, as an absolute path. This is a readonly
attribute, so shouldn't be specified when creating a volume.
...
...
@@ -355,6 +357,45 @@
element contains the numeric group ID. The
<code>
label
</code>
element
contains the MAC (eg SELinux) label string.
<span
class=
"since"
>
Since 0.4.1
</span>
</dd></dl>
<h3>
<a
name=
"StorageVolBacking"
id=
"StorageVolBacking"
>
Backing store elements
</a>
</h3>
<p>
A single
<code>
backingStore
</code>
element is contained within the top level
<code>
volume
</code>
element. This tag is used to describe the optional copy
on write, backing store for the storage volume. It can contain the following
child elements:
</p>
<pre>
...
<
backingStore
>
<
path
>
/var/lib/virt/images/master.img
<
/path
>
<
format
>
raw
<
/format
>
<
permissions
>
<
owner
>
0744
<
/owner
>
<
group
>
0744
<
/group
>
<
mode
>
0744
<
/mode
>
<
label
>
virt_image_t
<
/label
>
<
/permissions
>
<
/backingStore
>
<
/volume
>
</pre>
<dl><dt><code>
path
</code></dt><dd>
Provides the location at which the backing store can be accessed on
the local filesystem, as an absolute path. If omitted, there is no
backing store for this volume.
<span
class=
"since"
>
Since 0.6.0
</span></dd><dt><code>
format
</code></dt><dd>
Provides information about the pool specific backing store format.
For disk pools it will provide the partition type. For filesystem
or directory pools it will provide the file format type, eg cow,
qcow, vmdk, raw. Consult the pool-specific docs for the list of valid
values. Most file formats require a backing store of the same format,
however, the qcow2 format allows a different backing store format.
<span
class=
"since"
>
Since 0.6.0
</span></dd><dt><code>
permissions
</code></dt><dd>
Provides information about the permissions of the backing file.
It contains 4 child elements. The
<code>
mode
</code>
element contains the octal permission set. The
<code>
owner
</code>
element contains the numeric user ID. The
<code>
group
</code>
element contains the numeric group ID. The
<code>
label
</code>
element
contains the MAC (eg SELinux) label string.
<span
class=
"since"
>
Since 0.6.0
</span>
</dd></dl>
<h2>
<a
name=
"examples"
id=
"examples"
>
Example configuration
</a>
...
...
docs/formatstorage.html.in
浏览文件 @
489fde76
...
...
@@ -234,14 +234,14 @@
...
<
target
>
<
path
>
/var/lib/virt/images/sparse.img
<
/path
>
<
format
>
qcow2
<
/format
>
<
permissions
>
<
owner
>
0744
<
/owner
>
<
group
>
0744
<
/group
>
<
mode
>
0744
<
/mode
>
<
label
>
virt_image_t
<
/label
>
<
/permissions
>
<
/target
>
<
/volume
>
</pre>
<
/target
>
</pre>
<dl>
<dt><code>
path
</code></dt>
...
...
@@ -271,6 +271,54 @@
</dd>
</dl>
<h3><a
name=
"StorageVolBacking"
>
Backing store elements
</a></h3>
<p>
A single
<code>
backingStore
</code>
element is contained within the top level
<code>
volume
</code>
element. This tag is used to describe the optional copy
on write, backing store for the storage volume. It can contain the following
child elements:
</p>
<pre>
...
<
backingStore
>
<
path
>
/var/lib/virt/images/master.img
<
/path
>
<
format
>
raw
<
/format
>
<
permissions
>
<
owner
>
0744
<
/owner
>
<
group
>
0744
<
/group
>
<
mode
>
0744
<
/mode
>
<
label
>
virt_image_t
<
/label
>
<
/permissions
>
<
/backingStore
>
<
/volume
>
</pre>
<dl>
<dt><code>
path
</code></dt>
<dd>
Provides the location at which the backing store can be accessed on
the local filesystem, as an absolute path. If omitted, there is no
backing store for this volume.
<span
class=
"since"
>
Since 0.6.0
</span></dd>
<dt><code>
format
</code></dt>
<dd>
Provides information about the pool specific backing store format.
For disk pools it will provide the partition type. For filesystem
or directory pools it will provide the file format type, eg cow,
qcow, vmdk, raw. Consult the pool-specific docs for the list of valid
values. Most file formats require a backing store of the same format,
however, the qcow2 format allows a different backing store format.
<span
class=
"since"
>
Since 0.6.0
</span></dd>
<dt><code>
permissions
</code></dt>
<dd>
Provides information about the permissions of the backing file.
It contains 4 child elements. The
<code>
mode
</code>
element contains the octal permission set. The
<code>
owner
</code>
element contains the numeric user ID. The
<code>
group
</code>
element contains the numeric group ID. The
<code>
label
</code>
element
contains the MAC (eg SELinux) label string.
<span
class=
"since"
>
Since 0.6.0
</span>
</dd>
</dl>
<h2><a
name=
"examples"
>
Example configuration
</a></h2>
<p>
...
...
src/libvirt_private.syms
浏览文件 @
489fde76
...
...
@@ -259,6 +259,7 @@ virStoragePoolFormatDiskTypeToString;
virStoragePoolFormatFileSystemTypeToString;
virStoragePoolFormatFileSystemNetTypeToString;
virStorageVolFormatFileSystemTypeToString;
virStorageVolFormatFileSystemTypeFromString;
virStoragePoolTypeFromString;
virStoragePoolObjLock;
virStoragePoolObjUnlock;
...
...
src/storage_backend.c
浏览文件 @
489fde76
...
...
@@ -99,29 +99,53 @@ virStorageBackendForType(int type) {
int
virStorageBackendUpdateVolInfo
(
virConnectPtr
conn
,
virStorageVolDefPtr
vol
,
int
withCapacity
)
virStorageBackendUpdateVolTargetInfo
(
virConnectPtr
conn
,
virStorageVolTargetPtr
target
,
unsigned
long
long
*
allocation
,
unsigned
long
long
*
capacity
)
{
int
ret
,
fd
;
if
((
fd
=
open
(
vol
->
target
.
path
,
O_RDONLY
))
<
0
)
{
if
((
fd
=
open
(
target
->
path
,
O_RDONLY
))
<
0
)
{
virReportSystemError
(
conn
,
errno
,
_
(
"cannot open volume '%s'"
),
vol
->
target
.
path
);
target
->
path
);
return
-
1
;
}
ret
=
virStorageBackendUpdateVolInfoFD
(
conn
,
vol
,
ret
=
virStorageBackendUpdateVol
Target
InfoFD
(
conn
,
target
,
fd
,
withCapacity
);
allocation
,
capacity
);
close
(
fd
);
return
ret
;
}
int
virStorageBackendUpdateVolInfo
(
virConnectPtr
conn
,
virStorageVolDefPtr
vol
,
int
withCapacity
)
{
int
ret
;
if
((
ret
=
virStorageBackendUpdateVolTargetInfo
(
conn
,
&
vol
->
target
,
&
vol
->
allocation
,
withCapacity
?
&
vol
->
capacity
:
NULL
))
<
0
)
return
ret
;
if
(
vol
->
backingStore
.
path
&&
(
ret
=
virStorageBackendUpdateVolTargetInfo
(
conn
,
&
vol
->
backingStore
,
NULL
,
NULL
))
<
0
)
return
ret
;
return
0
;
}
struct
diskType
{
int
part_table_type
;
unsigned
short
offset
;
...
...
@@ -154,10 +178,11 @@ static struct diskType const disk_types[] = {
};
int
virStorageBackendUpdateVolInfoFD
(
virConnectPtr
conn
,
virStorageVolDefPtr
vol
,
virStorageBackendUpdateVol
Target
InfoFD
(
virConnectPtr
conn
,
virStorageVolTargetPtr
target
,
int
fd
,
int
withCapacity
)
unsigned
long
long
*
allocation
,
unsigned
long
long
*
capacity
)
{
struct
stat
sb
;
#if HAVE_SELINUX
...
...
@@ -167,7 +192,7 @@ virStorageBackendUpdateVolInfoFD(virConnectPtr conn,
if
(
fstat
(
fd
,
&
sb
)
<
0
)
{
virReportSystemError
(
conn
,
errno
,
_
(
"cannot stat file '%s'"
),
vol
->
target
.
path
);
target
->
path
);
return
-
1
;
}
...
...
@@ -176,18 +201,19 @@ virStorageBackendUpdateVolInfoFD(virConnectPtr conn,
!
S_ISBLK
(
sb
.
st_mode
))
return
-
2
;
if
(
allocation
)
{
if
(
S_ISREG
(
sb
.
st_mode
))
{
#ifndef __MINGW32__
vol
->
allocation
=
(
unsigned
long
long
)
sb
.
st_blocks
*
*
allocation
=
(
unsigned
long
long
)
sb
.
st_blocks
*
(
unsigned
long
long
)
sb
.
st_blksize
;
#else
vol
->
allocation
=
sb
.
st_size
;
*
allocation
=
sb
.
st_size
;
#endif
/* Regular files may be sparse, so logical size (capacity) is not same
* as actual allocation above
*/
if
(
withC
apacity
)
vol
->
capacity
=
sb
.
st_size
;
if
(
c
apacity
)
*
capacity
=
sb
.
st_size
;
}
else
{
off_t
end
;
/* XXX this is POSIX compliant, but doesn't work for for CHAR files,
...
...
@@ -199,15 +225,17 @@ virStorageBackendUpdateVolInfoFD(virConnectPtr conn,
if
(
end
==
(
off_t
)
-
1
)
{
virReportSystemError
(
conn
,
errno
,
_
(
"cannot seek to end of file '%s'"
),
vol
->
target
.
path
);
target
->
path
);
return
-
1
;
}
vol
->
allocation
=
end
;
if
(
withCapacity
)
vol
->
capacity
=
end
;
*
allocation
=
end
;
if
(
capacity
)
*
capacity
=
end
;
}
}
/* make sure to set the target format "unknown" to begin with */
vol
->
target
.
format
=
VIR_STORAGE_POOL_DISK_UNKNOWN
;
target
->
format
=
VIR_STORAGE_POOL_DISK_UNKNOWN
;
if
(
S_ISBLK
(
sb
.
st_mode
))
{
off_t
start
;
...
...
@@ -219,14 +247,14 @@ virStorageBackendUpdateVolInfoFD(virConnectPtr conn,
if
(
start
<
0
)
{
virReportSystemError
(
conn
,
errno
,
_
(
"cannot seek to beginning of file '%s'"
),
vol
->
target
.
path
);
target
->
path
);
return
-
1
;
}
bytes
=
saferead
(
fd
,
buffer
,
sizeof
(
buffer
));
if
(
bytes
<
0
)
{
virReportSystemError
(
conn
,
errno
,
_
(
"cannot read beginning of file '%s'"
),
vol
->
target
.
path
);
target
->
path
);
return
-
1
;
}
...
...
@@ -235,38 +263,38 @@ virStorageBackendUpdateVolInfoFD(virConnectPtr conn,
continue
;
if
(
memcmp
(
buffer
+
disk_types
[
i
].
offset
,
&
disk_types
[
i
].
magic
,
disk_types
[
i
].
length
)
==
0
)
{
vol
->
target
.
format
=
disk_types
[
i
].
part_table_type
;
target
->
format
=
disk_types
[
i
].
part_table_type
;
break
;
}
}
}
vol
->
target
.
perms
.
mode
=
sb
.
st_mode
;
vol
->
target
.
perms
.
uid
=
sb
.
st_uid
;
vol
->
target
.
perms
.
gid
=
sb
.
st_gid
;
target
->
perms
.
mode
=
sb
.
st_mode
&
S_IRWXUGO
;
target
->
perms
.
uid
=
sb
.
st_uid
;
target
->
perms
.
gid
=
sb
.
st_gid
;
VIR_FREE
(
vol
->
target
.
perms
.
label
);
VIR_FREE
(
target
->
perms
.
label
);
#if HAVE_SELINUX
if
(
fgetfilecon
(
fd
,
&
filecon
)
==
-
1
)
{
if
(
errno
!=
ENODATA
&&
errno
!=
ENOTSUP
)
{
virReportSystemError
(
conn
,
errno
,
_
(
"cannot get file context of '%s'"
),
vol
->
target
.
path
);
target
->
path
);
return
-
1
;
}
else
{
vol
->
target
.
perms
.
label
=
NULL
;
target
->
perms
.
label
=
NULL
;
}
}
else
{
vol
->
target
.
perms
.
label
=
strdup
(
filecon
);
if
(
vol
->
target
.
perms
.
label
==
NULL
)
{
target
->
perms
.
label
=
strdup
(
filecon
);
if
(
target
->
perms
.
label
==
NULL
)
{
virReportOOMError
(
conn
);
return
-
1
;
}
freecon
(
filecon
);
}
#else
vol
->
target
.
perms
.
label
=
NULL
;
target
->
perms
.
label
=
NULL
;
#endif
return
0
;
...
...
src/storage_backend.h
浏览文件 @
489fde76
...
...
@@ -64,10 +64,15 @@ int virStorageBackendUpdateVolInfo(virConnectPtr conn,
virStorageVolDefPtr
vol
,
int
withCapacity
);
int
virStorageBackendUpdateVolInfoFD
(
virConnectPtr
conn
,
virStorageVolDefPtr
vol
,
int
virStorageBackendUpdateVolTargetInfo
(
virConnectPtr
conn
,
virStorageVolTargetPtr
target
,
unsigned
long
long
*
allocation
,
unsigned
long
long
*
capacity
);
int
virStorageBackendUpdateVolTargetInfoFD
(
virConnectPtr
conn
,
virStorageVolTargetPtr
target
,
int
fd
,
int
withCapacity
);
unsigned
long
long
*
allocation
,
unsigned
long
long
*
capacity
);
void
virStorageBackendWaitForDevices
(
virConnectPtr
conn
);
...
...
src/storage_backend_fs.c
浏览文件 @
489fde76
...
...
@@ -49,6 +49,19 @@ enum lv_endian {
LV_BIG_ENDIAN
/* 4321 */
};
enum
{
BACKING_STORE_OK
,
BACKING_STORE_INVALID
,
BACKING_STORE_ERROR
,
};
static
int
cowGetBackingStore
(
virConnectPtr
,
char
**
,
const
unsigned
char
*
,
size_t
);
static
int
qcowXGetBackingStore
(
virConnectPtr
,
char
**
,
const
unsigned
char
*
,
size_t
);
static
int
vmdk4GetBackingStore
(
virConnectPtr
,
char
**
,
const
unsigned
char
*
,
size_t
);
/* Either 'magic' or 'extension' *must* be provided */
struct
FileTypeInfo
{
int
type
;
/* One of the constants above */
...
...
@@ -65,85 +78,228 @@ struct FileTypeInfo {
* -1 to use st_size as capacity */
int
sizeBytes
;
/* Number of bytes for size field */
int
sizeMultiplier
;
/* A scaling factor if size is not in bytes */
/* Store a COW base image path (possibly relative),
* or NULL if there is no COW base image, to RES;
* return BACKING_STORE_* */
int
(
*
getBackingStore
)(
virConnectPtr
conn
,
char
**
res
,
const
unsigned
char
*
buf
,
size_t
buf_size
);
};
const
struct
FileTypeInfo
const
fileTypeInfo
[]
=
{
/* Bochs */
/* XXX Untested
{ VIR_STORAGE_VOL_BOCHS, "Bochs Virtual HD Image", NULL,
LV_LITTLE_ENDIAN, 64, 0x20000,
32+16+16+4+4+4+4+4, 8, 1 },*/
32+16+16+4+4+4+4+4, 8, 1
, NULL
},*/
/* CLoop */
/* XXX Untested
{ VIR_STORAGE_VOL_CLOOP, "#!/bin/sh\n#V2.0 Format\nmodprobe cloop file=$0 && mount -r -t iso9660 /dev/cloop $1\n", NULL,
LV_LITTLE_ENDIAN, -1, 0,
-1, 0, 0 }, */
-1, 0, 0
, NULL
}, */
/* Cow */
{
VIR_STORAGE_VOL_FILE_COW
,
"OOOM"
,
NULL
,
LV_BIG_ENDIAN
,
4
,
2
,
4
+
4
+
1024
+
4
,
8
,
1
},
4
+
4
+
1024
+
4
,
8
,
1
,
cowGetBackingStore
},
/* DMG */
/* XXX QEMU says there's no magic for dmg, but we should check... */
{
VIR_STORAGE_VOL_FILE_DMG
,
NULL
,
".dmg"
,
0
,
-
1
,
0
,
-
1
,
0
,
0
},
-
1
,
0
,
0
,
NULL
},
/* XXX there's probably some magic for iso we can validate too... */
{
VIR_STORAGE_VOL_FILE_ISO
,
NULL
,
".iso"
,
0
,
-
1
,
0
,
-
1
,
0
,
0
},
-
1
,
0
,
0
,
NULL
},
/* Parallels */
/* XXX Untested
{ VIR_STORAGE_VOL_FILE_PARALLELS, "WithoutFreeSpace", NULL,
LV_LITTLE_ENDIAN, 16, 2,
16+4+4+4+4, 4, 512 },
16+4+4+4+4, 4, 512
, NULL
},
*/
/* QCow */
{
VIR_STORAGE_VOL_FILE_QCOW
,
"QFI"
,
NULL
,
LV_BIG_ENDIAN
,
4
,
1
,
4
+
4
+
8
+
4
+
4
,
8
,
1
},
4
+
4
+
8
+
4
+
4
,
8
,
1
,
qcowXGetBackingStore
},
/* QCow 2 */
{
VIR_STORAGE_VOL_FILE_QCOW2
,
"QFI"
,
NULL
,
LV_BIG_ENDIAN
,
4
,
2
,
4
+
4
+
8
+
4
+
4
,
8
,
1
},
4
+
4
+
8
+
4
+
4
,
8
,
1
,
qcowXGetBackingStore
},
/* VMDK 3 */
/* XXX Untested
{ VIR_STORAGE_VOL_FILE_VMDK, "COWD", NULL,
LV_LITTLE_ENDIAN, 4, 1,
4+4+4, 4, 512 },
4+4+4, 4, 512
, NULL
},
*/
/* VMDK 4 */
{
VIR_STORAGE_VOL_FILE_VMDK
,
"KDMV"
,
NULL
,
LV_LITTLE_ENDIAN
,
4
,
1
,
4
+
4
+
4
,
8
,
512
},
4
+
4
+
4
,
8
,
512
,
vmdk4GetBackingStore
},
/* Connectix / VirtualPC */
/* XXX Untested
{ VIR_STORAGE_VOL_FILE_VPC, "conectix", NULL,
LV_BIG_ENDIAN, -1, 0,
-1, 0, 0},
-1, 0, 0
, NULL
},
*/
};
#define VIR_FROM_THIS VIR_FROM_STORAGE
static
int
cowGetBackingStore
(
virConnectPtr
conn
,
char
**
res
,
const
unsigned
char
*
buf
,
size_t
buf_size
)
{
#define COW_FILENAME_MAXLEN 1024
*
res
=
NULL
;
if
(
buf_size
<
4
+
4
+
COW_FILENAME_MAXLEN
)
return
BACKING_STORE_INVALID
;
if
(
buf
[
4
+
4
]
==
'\0'
)
/* cow_header_v2.backing_file[0] */
return
BACKING_STORE_OK
;
*
res
=
strndup
((
const
char
*
)
buf
+
4
+
4
,
COW_FILENAME_MAXLEN
);
if
(
*
res
==
NULL
)
{
virReportOOMError
(
conn
);
return
BACKING_STORE_ERROR
;
}
return
BACKING_STORE_OK
;
}
static
int
qcowXGetBackingStore
(
virConnectPtr
conn
,
char
**
res
,
const
unsigned
char
*
buf
,
size_t
buf_size
)
{
unsigned
long
long
offset
;
unsigned
long
size
;
*
res
=
NULL
;
if
(
buf_size
<
4
+
4
+
8
+
4
)
return
BACKING_STORE_INVALID
;
offset
=
(((
unsigned
long
long
)
buf
[
4
+
4
]
<<
56
)
|
((
unsigned
long
long
)
buf
[
4
+
4
+
1
]
<<
48
)
|
((
unsigned
long
long
)
buf
[
4
+
4
+
2
]
<<
40
)
|
((
unsigned
long
long
)
buf
[
4
+
4
+
3
]
<<
32
)
|
((
unsigned
long
long
)
buf
[
4
+
4
+
4
]
<<
24
)
|
((
unsigned
long
long
)
buf
[
4
+
4
+
5
]
<<
16
)
|
((
unsigned
long
long
)
buf
[
4
+
4
+
6
]
<<
8
)
|
buf
[
4
+
4
+
7
]);
/* QCowHeader.backing_file_offset */
if
(
offset
>
buf_size
)
return
BACKING_STORE_INVALID
;
size
=
((
buf
[
4
+
4
+
8
]
<<
24
)
|
(
buf
[
4
+
4
+
8
+
1
]
<<
16
)
|
(
buf
[
4
+
4
+
8
+
2
]
<<
8
)
|
buf
[
4
+
4
+
8
+
3
]);
/* QCowHeader.backing_file_size */
if
(
size
==
0
)
return
BACKING_STORE_OK
;
if
(
offset
+
size
>
buf_size
||
offset
+
size
<
offset
)
return
BACKING_STORE_INVALID
;
if
(
size
+
1
==
0
)
return
BACKING_STORE_INVALID
;
if
(
VIR_ALLOC_N
(
*
res
,
size
+
1
)
<
0
)
{
virStorageReportError
(
conn
,
VIR_ERR_NO_MEMORY
,
_
(
"backing store path"
));
return
BACKING_STORE_ERROR
;
}
memcpy
(
*
res
,
buf
+
offset
,
size
);
(
*
res
)[
size
]
=
'\0'
;
return
BACKING_STORE_OK
;
}
static
int
vmdk4GetBackingStore
(
virConnectPtr
conn
,
char
**
res
,
const
unsigned
char
*
buf
,
size_t
buf_size
)
{
static
const
char
prefix
[]
=
"parentFileNameHint=
\"
"
;
char
desc
[
20
*
512
+
1
],
*
start
,
*
end
;
size_t
len
;
*
res
=
NULL
;
if
(
buf_size
<=
0x200
)
return
BACKING_STORE_INVALID
;
len
=
buf_size
-
0x200
;
if
(
len
>
sizeof
(
desc
)
-
1
)
len
=
sizeof
(
desc
)
-
1
;
memcpy
(
desc
,
buf
+
0x200
,
len
);
desc
[
len
]
=
'\0'
;
start
=
strstr
(
desc
,
prefix
);
if
(
start
==
NULL
)
return
BACKING_STORE_OK
;
start
+=
strlen
(
prefix
);
end
=
strchr
(
start
,
'"'
);
if
(
end
==
NULL
)
return
BACKING_STORE_INVALID
;
if
(
end
==
start
)
return
BACKING_STORE_OK
;
*
end
=
'\0'
;
*
res
=
strdup
(
start
);
if
(
*
res
==
NULL
)
{
virStorageReportError
(
conn
,
VIR_ERR_NO_MEMORY
,
_
(
"backing store path"
));
return
BACKING_STORE_ERROR
;
}
return
BACKING_STORE_OK
;
}
/**
* Return an absolute path corresponding to PATH, which is absolute or relative
* to the directory containing BASE_FILE, or NULL on error
*/
static
char
*
absolutePathFromBaseFile
(
const
char
*
base_file
,
const
char
*
path
)
{
size_t
base_size
,
path_size
;
char
*
res
,
*
p
;
if
(
*
path
==
'/'
)
return
strdup
(
path
);
base_size
=
strlen
(
base_file
)
+
1
;
path_size
=
strlen
(
path
)
+
1
;
if
(
VIR_ALLOC_N
(
res
,
base_size
-
1
+
path_size
)
<
0
)
return
NULL
;
memcpy
(
res
,
base_file
,
base_size
);
p
=
strrchr
(
res
,
'/'
);
if
(
p
!=
NULL
)
p
++
;
else
p
=
res
;
memcpy
(
p
,
path
,
path_size
);
if
(
VIR_REALLOC_N
(
res
,
(
p
+
path_size
)
-
res
)
<
0
)
{
/* Ignore failure */
}
return
res
;
}
/**
* Probe the header of a file to determine what type of disk image
* it is, and info about its capacity if available.
*/
static
int
virStorageBackendProbeFile
(
virConnectPtr
conn
,
virStorageVolDefPtr
def
)
{
static
int
virStorageBackendProbeTarget
(
virConnectPtr
conn
,
virStorageVolTargetPtr
target
,
char
**
backingStore
,
unsigned
long
long
*
allocation
,
unsigned
long
long
*
capacity
)
{
int
fd
;
unsigned
char
head
[
4096
];
unsigned
char
head
[
20
*
512
];
/* vmdk4GetBackingStore needs this much. */
int
len
,
i
,
ret
;
if
((
fd
=
open
(
def
->
target
.
path
,
O_RDONLY
))
<
0
)
{
if
(
backingStore
)
*
backingStore
=
NULL
;
if
((
fd
=
open
(
target
->
path
,
O_RDONLY
))
<
0
)
{
virReportSystemError
(
conn
,
errno
,
_
(
"cannot open volume '%s'"
),
def
->
target
.
path
);
target
->
path
);
return
-
1
;
}
if
((
ret
=
virStorageBackendUpdateVolInfoFD
(
conn
,
def
,
fd
,
1
))
<
0
)
{
if
((
ret
=
virStorageBackendUpdateVolTargetInfoFD
(
conn
,
target
,
fd
,
allocation
,
capacity
))
<
0
)
{
close
(
fd
);
return
ret
;
/* Take care to propagate ret, it is not always -1 */
}
...
...
@@ -151,7 +307,7 @@ static int virStorageBackendProbeFile(virConnectPtr conn,
if
((
len
=
read
(
fd
,
head
,
sizeof
(
head
)))
<
0
)
{
virReportSystemError
(
conn
,
errno
,
_
(
"cannot read header '%s'"
),
def
->
target
.
path
);
target
->
path
);
close
(
fd
);
return
-
1
;
}
...
...
@@ -191,9 +347,9 @@ static int virStorageBackendProbeFile(virConnectPtr conn,
}
/* Optionally extract capacity from file */
if
(
fileTypeInfo
[
i
].
sizeOffset
!=
-
1
)
{
if
(
fileTypeInfo
[
i
].
sizeOffset
!=
-
1
&&
capacity
)
{
if
(
fileTypeInfo
[
i
].
endian
==
LV_LITTLE_ENDIAN
)
{
def
->
capacity
=
*
capacity
=
((
unsigned
long
long
)
head
[
fileTypeInfo
[
i
].
sizeOffset
+
7
]
<<
56
)
|
((
unsigned
long
long
)
head
[
fileTypeInfo
[
i
].
sizeOffset
+
6
]
<<
48
)
|
((
unsigned
long
long
)
head
[
fileTypeInfo
[
i
].
sizeOffset
+
5
]
<<
40
)
|
...
...
@@ -203,7 +359,7 @@ static int virStorageBackendProbeFile(virConnectPtr conn,
((
unsigned
long
long
)
head
[
fileTypeInfo
[
i
].
sizeOffset
+
1
]
<<
8
)
|
((
unsigned
long
long
)
head
[
fileTypeInfo
[
i
].
sizeOffset
]);
}
else
{
def
->
capacity
=
*
capacity
=
((
unsigned
long
long
)
head
[
fileTypeInfo
[
i
].
sizeOffset
]
<<
56
)
|
((
unsigned
long
long
)
head
[
fileTypeInfo
[
i
].
sizeOffset
+
1
]
<<
48
)
|
((
unsigned
long
long
)
head
[
fileTypeInfo
[
i
].
sizeOffset
+
2
]
<<
40
)
|
...
...
@@ -214,13 +370,37 @@ static int virStorageBackendProbeFile(virConnectPtr conn,
((
unsigned
long
long
)
head
[
fileTypeInfo
[
i
].
sizeOffset
+
7
]);
}
/* Avoid unlikely, but theoretically possible overflow */
if
(
def
->
capacity
>
(
ULLONG_MAX
/
fileTypeInfo
[
i
].
sizeMultiplier
))
if
(
*
capacity
>
(
ULLONG_MAX
/
fileTypeInfo
[
i
].
sizeMultiplier
))
continue
;
def
->
capacity
*=
fileTypeInfo
[
i
].
sizeMultiplier
;
*
capacity
*=
fileTypeInfo
[
i
].
sizeMultiplier
;
}
/* Validation passed, we know the file format now */
def
->
target
.
format
=
fileTypeInfo
[
i
].
type
;
target
->
format
=
fileTypeInfo
[
i
].
type
;
if
(
fileTypeInfo
[
i
].
getBackingStore
!=
NULL
&&
backingStore
)
{
char
*
base
;
switch
(
fileTypeInfo
[
i
].
getBackingStore
(
conn
,
&
base
,
head
,
len
))
{
case
BACKING_STORE_OK
:
break
;
case
BACKING_STORE_INVALID
:
continue
;
case
BACKING_STORE_ERROR
:
return
-
1
;
}
if
(
base
!=
NULL
)
{
*
backingStore
=
absolutePathFromBaseFile
(
target
->
path
,
base
);
VIR_FREE
(
base
);
if
(
*
backingStore
==
NULL
)
{
virStorageReportError
(
conn
,
VIR_ERR_NO_MEMORY
,
_
(
"backing store path"
));
return
-
1
;
}
}
}
return
0
;
}
...
...
@@ -229,15 +409,15 @@ static int virStorageBackendProbeFile(virConnectPtr conn,
if
(
fileTypeInfo
[
i
].
extension
==
NULL
)
continue
;
if
(
!
virFileHasSuffix
(
def
->
target
.
path
,
fileTypeInfo
[
i
].
extension
))
if
(
!
virFileHasSuffix
(
target
->
path
,
fileTypeInfo
[
i
].
extension
))
continue
;
def
->
target
.
format
=
fileTypeInfo
[
i
].
type
;
target
->
format
=
fileTypeInfo
[
i
].
type
;
return
0
;
}
/* All fails, so call it a raw file */
def
->
target
.
format
=
VIR_STORAGE_VOL_FILE_RAW
;
target
->
format
=
VIR_STORAGE_VOL_FILE_RAW
;
return
0
;
}
...
...
@@ -636,6 +816,7 @@ virStorageBackendFileSystemRefresh(virConnectPtr conn,
while
((
ent
=
readdir
(
dir
))
!=
NULL
)
{
int
ret
;
char
*
backingStore
;
if
(
VIR_ALLOC
(
vol
)
<
0
)
goto
no_memory
;
...
...
@@ -655,7 +836,11 @@ virStorageBackendFileSystemRefresh(virConnectPtr conn,
if
((
vol
->
key
=
strdup
(
vol
->
target
.
path
))
==
NULL
)
goto
no_memory
;
if
((
ret
=
virStorageBackendProbeFile
(
conn
,
vol
)
<
0
))
{
if
((
ret
=
virStorageBackendProbeTarget
(
conn
,
&
vol
->
target
,
&
backingStore
,
&
vol
->
allocation
,
&
vol
->
capacity
)
<
0
))
{
if
(
ret
==
-
1
)
goto
no_memory
;
else
{
...
...
@@ -667,6 +852,48 @@ virStorageBackendFileSystemRefresh(virConnectPtr conn,
}
}
if
(
backingStore
!=
NULL
)
{
if
(
vol
->
target
.
format
==
VIR_STORAGE_VOL_FILE_QCOW2
&&
STRPREFIX
(
"fmt:"
,
backingStore
))
{
char
*
fmtstr
=
backingStore
+
4
;
char
*
path
=
strchr
(
fmtstr
,
':'
);
if
(
!
path
)
{
VIR_FREE
(
backingStore
);
}
else
{
*
path
=
'\0'
;
if
((
vol
->
backingStore
.
format
=
virStorageVolFormatFileSystemTypeFromString
(
fmtstr
))
<
0
)
{
VIR_FREE
(
backingStore
);
}
else
{
memmove
(
backingStore
,
path
,
strlen
(
path
)
+
1
);
vol
->
backingStore
.
path
=
backingStore
;
if
(
virStorageBackendUpdateVolTargetInfo
(
conn
,
&
vol
->
backingStore
,
NULL
,
NULL
)
<
0
)
VIR_FREE
(
vol
->
backingStore
);
}
}
}
else
{
vol
->
backingStore
.
path
=
backingStore
;
if
((
ret
=
virStorageBackendProbeTarget
(
conn
,
&
vol
->
backingStore
,
NULL
,
NULL
,
NULL
))
<
0
)
{
if
(
ret
==
-
1
)
goto
no_memory
;
else
{
/* Silently ignore non-regular files,
* eg '.' '..', 'lost+found' */
VIR_FREE
(
vol
->
backingStore
);
}
}
}
}
if
(
VIR_REALLOC_N
(
pool
->
volumes
.
objs
,
pool
->
volumes
.
count
+
1
)
<
0
)
goto
no_memory
;
...
...
@@ -836,28 +1063,48 @@ virStorageBackendFileSystemVolCreate(virConnectPtr conn,
}
}
else
{
#if HAVE_QEMU_IMG
const
char
*
type
;
const
char
*
type
=
virStorageVolFormatFileSystemTypeToString
(
vol
->
target
.
format
);
const
char
*
backingType
=
vol
->
backingStore
.
path
?
virStorageVolFormatFileSystemTypeToString
(
vol
->
backingStore
.
format
)
:
NULL
;
char
size
[
100
];
const
char
*
imgargv
[
7
];
const
char
**
imgargv
;
const
char
*
imgargvnormal
[]
=
{
QEMU_IMG
,
"create"
,
"-f"
,
type
,
vol
->
target
.
path
,
size
,
NULL
,
};
/* XXX including "backingType" here too, once QEMU accepts
* the patches to specify it. It'll probably be -F backingType */
const
char
*
imgargvbacking
[]
=
{
QEMU_IMG
,
"create"
,
"-f"
,
type
,
"-b"
,
vol
->
backingStore
.
path
,
vol
->
target
.
path
,
size
,
NULL
,
};
if
(
(
type
=
virStorageVolFormatFileSystemTypeToString
(
vol
->
target
.
format
))
==
NULL
)
{
if
(
type
==
NULL
)
{
virStorageReportError
(
conn
,
VIR_ERR_INTERNAL_ERROR
,
_
(
"unknown storage vol type %d"
),
vol
->
target
.
format
);
return
-
1
;
}
if
(
vol
->
backingStore
.
path
==
NULL
)
{
imgargv
=
imgargvnormal
;
}
else
{
if
(
backingType
==
NULL
)
{
virStorageReportError
(
conn
,
VIR_ERR_INTERNAL_ERROR
,
_
(
"unknown storage vol backing store type %d"
),
vol
->
backingStore
.
format
);
return
-
1
;
}
if
(
access
(
vol
->
backingStore
.
path
,
R_OK
)
!=
0
)
{
virReportSystemError
(
conn
,
errno
,
_
(
"inaccessible backing store volume %s"
),
vol
->
backingStore
.
path
);
return
-
1
;
}
imgargv
=
imgargvbacking
;
}
/* Size in KB */
snprintf
(
size
,
sizeof
(
size
),
"%llu"
,
vol
->
capacity
/
1024
);
imgargv
[
0
]
=
QEMU_IMG
;
imgargv
[
1
]
=
"create"
;
imgargv
[
2
]
=
"-f"
;
imgargv
[
3
]
=
type
;
imgargv
[
4
]
=
vol
->
target
.
path
;
imgargv
[
5
]
=
size
;
imgargv
[
6
]
=
NULL
;
if
(
virRun
(
conn
,
imgargv
,
NULL
)
<
0
)
{
unlink
(
vol
->
target
.
path
);
return
-
1
;
...
...
@@ -884,6 +1131,12 @@ virStorageBackendFileSystemVolCreate(virConnectPtr conn,
vol
->
target
.
format
);
return
-
1
;
}
if
(
vol
->
target
.
backingStore
!=
NULL
)
{
virStorageReportError
(
conn
,
VIR_ERR_NO_SUPPORT
,
_
(
"copy-on-write image not supported with "
"qcow-create"
));
return
-
1
;
}
/* Size in MB - yes different units to qemu-img :-( */
snprintf
(
size
,
sizeof
(
size
),
"%llu"
,
vol
->
capacity
/
1024
/
1024
);
...
...
@@ -934,7 +1187,9 @@ virStorageBackendFileSystemVolCreate(virConnectPtr conn,
}
/* Refresh allocation / permissions info, but not capacity */
if
(
virStorageBackendUpdateVolInfoFD
(
conn
,
vol
,
fd
,
0
)
<
0
)
{
if
(
virStorageBackendUpdateVolTargetInfoFD
(
conn
,
&
vol
->
target
,
fd
,
&
vol
->
allocation
,
NULL
)
<
0
)
{
unlink
(
vol
->
target
.
path
);
close
(
fd
);
return
-
1
;
...
...
src/storage_backend_iscsi.c
浏览文件 @
489fde76
...
...
@@ -228,7 +228,11 @@ virStorageBackendISCSINewLun(virConnectPtr conn, virStoragePoolObjPtr pool,
VIR_FREE
(
devpath
);
if
(
virStorageBackendUpdateVolInfoFD
(
conn
,
vol
,
fd
,
1
)
<
0
)
if
(
virStorageBackendUpdateVolTargetInfoFD
(
conn
,
&
vol
->
target
,
fd
,
&
vol
->
allocation
,
&
vol
->
capacity
)
<
0
)
goto
cleanup
;
/* XXX use unique iSCSI id instead */
...
...
src/storage_backend_logical.c
浏览文件 @
489fde76
...
...
@@ -106,18 +106,27 @@ virStorageBackendLogicalMakeVol(virConnectPtr conn,
}
if
(
vol
->
target
.
path
==
NULL
)
{
if
(
VIR_ALLOC_N
(
vol
->
target
.
path
,
strlen
(
pool
->
def
->
target
.
path
)
+
1
+
strlen
(
vol
->
name
)
+
1
)
<
0
)
{
virStorageReportError
(
conn
,
VIR_ERR_NO_MEMORY
,
"%s"
,
_
(
"volume"
));
if
(
virAsprintf
(
&
vol
->
target
.
path
,
"%s/%s"
,
pool
->
def
->
target
.
path
,
vol
->
name
)
<
0
)
{
virReportOOMError
(
conn
);
virStorageVolDefFree
(
vol
);
return
-
1
;
}
strcpy
(
vol
->
target
.
path
,
pool
->
def
->
target
.
path
);
strcat
(
vol
->
target
.
path
,
"/"
);
strcat
(
vol
->
target
.
path
,
vol
->
name
);
}
if
(
groups
[
1
]
&&
!
STREQ
(
groups
[
1
],
""
))
{
if
(
virAsprintf
(
&
vol
->
backingStore
.
path
,
"%s/%s"
,
pool
->
def
->
target
.
path
,
groups
[
1
])
<
0
)
{
virReportOOMError
(
conn
);
virStorageVolDefFree
(
vol
);
return
-
1
;
}
vol
->
backingStore
.
format
=
VIR_STORAGE_POOL_LOGICAL_LVM2
;
}
if
(
vol
->
key
==
NULL
&&
(
vol
->
key
=
strdup
(
groups
[
1
]))
==
NULL
)
{
(
vol
->
key
=
strdup
(
groups
[
2
]))
==
NULL
)
{
virStorageReportError
(
conn
,
VIR_ERR_NO_MEMORY
,
"%s"
,
_
(
"volume"
));
return
-
1
;
}
...
...
@@ -134,22 +143,22 @@ virStorageBackendLogicalMakeVol(virConnectPtr conn,
}
if
((
vol
->
source
.
extents
[
vol
->
source
.
nextent
].
path
=
strdup
(
groups
[
2
]))
==
NULL
)
{
strdup
(
groups
[
3
]))
==
NULL
)
{
virStorageReportError
(
conn
,
VIR_ERR_NO_MEMORY
,
"%s"
,
_
(
"extents"
));
return
-
1
;
}
if
(
virStrToLong_ull
(
groups
[
3
],
NULL
,
10
,
&
offset
)
<
0
)
{
if
(
virStrToLong_ull
(
groups
[
4
],
NULL
,
10
,
&
offset
)
<
0
)
{
virStorageReportError
(
conn
,
VIR_ERR_INTERNAL_ERROR
,
"%s"
,
_
(
"malformed volume extent offset value"
));
return
-
1
;
}
if
(
virStrToLong_ull
(
groups
[
4
],
NULL
,
10
,
&
length
)
<
0
)
{
if
(
virStrToLong_ull
(
groups
[
5
],
NULL
,
10
,
&
length
)
<
0
)
{
virStorageReportError
(
conn
,
VIR_ERR_INTERNAL_ERROR
,
"%s"
,
_
(
"malformed volume extent length value"
));
return
-
1
;
}
if
(
virStrToLong_ull
(
groups
[
5
],
NULL
,
10
,
&
size
)
<
0
)
{
if
(
virStrToLong_ull
(
groups
[
6
],
NULL
,
10
,
&
size
)
<
0
)
{
virStorageReportError
(
conn
,
VIR_ERR_INTERNAL_ERROR
,
"%s"
,
_
(
"malformed volume extent size value"
));
return
-
1
;
...
...
@@ -168,14 +177,14 @@ virStorageBackendLogicalFindLVs(virConnectPtr conn,
virStorageVolDefPtr
vol
)
{
/*
* # lvs --separator , --noheadings --units b --unbuffered --nosuffix --options "lv_name,uuid,devices,seg_size,vg_extent_size" VGNAME
* RootLV,06UgP5-2rhb-w3Bo-3mdR-WeoL-pytO-SAa2ky,/dev/hda2(0),5234491392,33554432
* SwapLV,oHviCK-8Ik0-paqS-V20c-nkhY-Bm1e-zgzU0M,/dev/hda2(156),1040187392,33554432
* Test2,3pg3he-mQsA-5Sui-h0i6-HNmc-Cz7W-QSndcR,/dev/hda2(219),1073741824,33554432
* Test3,UB5hFw-kmlm-LSoX-EI1t-ioVd-h7GL-M0W8Ht,/dev/hda2(251),2181038080,33554432
* Test3,UB5hFw-kmlm-LSoX-EI1t-ioVd-h7GL-M0W8Ht,/dev/hda2(187),1040187392,33554432
* # lvs --separator , --noheadings --units b --unbuffered --nosuffix --options "lv_name,
origin,
uuid,devices,seg_size,vg_extent_size" VGNAME
* RootLV,
,
06UgP5-2rhb-w3Bo-3mdR-WeoL-pytO-SAa2ky,/dev/hda2(0),5234491392,33554432
* SwapLV,
,
oHviCK-8Ik0-paqS-V20c-nkhY-Bm1e-zgzU0M,/dev/hda2(156),1040187392,33554432
* Test2,
,
3pg3he-mQsA-5Sui-h0i6-HNmc-Cz7W-QSndcR,/dev/hda2(219),1073741824,33554432
* Test3,
,
UB5hFw-kmlm-LSoX-EI1t-ioVd-h7GL-M0W8Ht,/dev/hda2(251),2181038080,33554432
* Test3,
Test2,
UB5hFw-kmlm-LSoX-EI1t-ioVd-h7GL-M0W8Ht,/dev/hda2(187),1040187392,33554432
*
* Pull out name & uuid, device, device extent start #, segment size, extent size.
* Pull out name
, origin,
& uuid, device, device extent start #, segment size, extent size.
*
* NB can be multiple rows per volume if they have many extents
*
...
...
@@ -185,15 +194,15 @@ virStorageBackendLogicalFindLVs(virConnectPtr conn,
* not a suitable separator (rhbz 470693).
*/
const
char
*
regexes
[]
=
{
"^
\\
s*(
\\
S+),(
\\
S+),(
\\
S+)
\\
((
\\
S+)
\\
),(
\\
S+),([0-9]+),?
\\
s*$"
"^
\\
s*(
\\
S+),(
\\
S
*),(
\\
S
+),(
\\
S+)
\\
((
\\
S+)
\\
),(
\\
S+),([0-9]+),?
\\
s*$"
};
int
vars
[]
=
{
6
7
};
const
char
*
prog
[]
=
{
LVS
,
"--separator"
,
","
,
"--noheadings"
,
"--units"
,
"b"
,
"--unbuffered"
,
"--nosuffix"
,
"--options"
,
"lv_name,uuid,devices,seg_size,vg_extent_size"
,
"lv_name,
origin,
uuid,devices,seg_size,vg_extent_size"
,
pool
->
def
->
source
.
name
,
NULL
};
...
...
@@ -565,10 +574,25 @@ virStorageBackendLogicalCreateVol(virConnectPtr conn,
{
int
fd
=
-
1
;
char
size
[
100
];
const
char
*
cmdargv
[]
=
{
const
char
*
cmdargv
new
[]
=
{
LVCREATE
,
"--name"
,
vol
->
name
,
"-L"
,
size
,
pool
->
def
->
target
.
path
,
NULL
};
const
char
*
cmdargvsnap
[]
=
{
LVCREATE
,
"--name"
,
vol
->
name
,
"-L"
,
size
,
"-s"
,
vol
->
backingStore
.
path
,
NULL
};
const
char
**
cmdargv
=
cmdargvnew
;
if
(
vol
->
backingStore
.
path
)
{
if
(
vol
->
backingStore
.
format
!=
VIR_STORAGE_POOL_LOGICAL_LVM2
)
{
virStorageReportError
(
conn
,
VIR_ERR_INTERNAL_ERROR
,
"%s"
,
_
(
"LVM snapshots must be backed by another LVM volume"
));
return
-
1
;
}
cmdargv
=
cmdargvsnap
;
}
snprintf
(
size
,
sizeof
(
size
)
-
1
,
"%lluK"
,
vol
->
capacity
/
1024
);
size
[
sizeof
(
size
)
-
1
]
=
'\0'
;
...
...
src/storage_conf.c
浏览文件 @
489fde76
...
...
@@ -249,6 +249,8 @@ virStorageVolDefFree(virStorageVolDefPtr def) {
VIR_FREE
(
def
->
target
.
path
);
VIR_FREE
(
def
->
target
.
perms
.
label
);
VIR_FREE
(
def
->
backingStore
.
path
);
VIR_FREE
(
def
->
backingStore
.
perms
.
label
);
VIR_FREE
(
def
);
}
...
...
@@ -998,6 +1000,28 @@ virStorageVolDefParseDoc(virConnectPtr conn,
if
(
virStorageVolDefParsePerms
(
conn
,
ctxt
,
&
ret
->
target
.
perms
)
<
0
)
goto
cleanup
;
ret
->
backingStore
.
path
=
virXPathString
(
conn
,
"string(/volume/backingStore/path)"
,
ctxt
);
if
(
options
->
formatFromString
)
{
char
*
format
=
virXPathString
(
conn
,
"string(/volume/backingStore/format/@type)"
,
ctxt
);
if
(
format
==
NULL
)
ret
->
backingStore
.
format
=
options
->
defaultFormat
;
else
ret
->
backingStore
.
format
=
(
options
->
formatFromString
)(
format
);
if
(
ret
->
backingStore
.
format
<
0
)
{
virStorageReportError
(
conn
,
VIR_ERR_XML_ERROR
,
_
(
"unknown volume format type %s"
),
format
);
VIR_FREE
(
format
);
goto
cleanup
;
}
VIR_FREE
(
format
);
}
if
(
virStorageVolDefParsePerms
(
conn
,
ctxt
,
&
ret
->
backingStore
.
perms
)
<
0
)
goto
cleanup
;
return
ret
;
cleanup:
...
...
@@ -1069,6 +1093,47 @@ virStorageVolDefParse(virConnectPtr conn,
}
static
int
virStorageVolTargetDefFormat
(
virConnectPtr
conn
,
virStorageVolOptionsPtr
options
,
virBufferPtr
buf
,
virStorageVolTargetPtr
def
,
const
char
*
type
)
{
virBufferVSprintf
(
buf
,
" <%s>
\n
"
,
type
);
if
(
def
->
path
)
virBufferVSprintf
(
buf
,
" <path>%s</path>
\n
"
,
def
->
path
);
if
(
options
->
formatToString
)
{
const
char
*
format
=
(
options
->
formatToString
)(
def
->
format
);
if
(
!
format
)
{
virStorageReportError
(
conn
,
VIR_ERR_INTERNAL_ERROR
,
_
(
"unknown volume format number %d"
),
def
->
format
);
return
-
1
;
}
virBufferVSprintf
(
buf
,
" <format type='%s'/>
\n
"
,
format
);
}
virBufferAddLit
(
buf
,
" <permissions>
\n
"
);
virBufferVSprintf
(
buf
,
" <mode>0%o</mode>
\n
"
,
def
->
perms
.
mode
);
virBufferVSprintf
(
buf
,
" <owner>%d</owner>
\n
"
,
def
->
perms
.
uid
);
virBufferVSprintf
(
buf
,
" <group>%d</group>
\n
"
,
def
->
perms
.
gid
);
if
(
def
->
perms
.
label
)
virBufferVSprintf
(
buf
,
" <label>%s</label>
\n
"
,
def
->
perms
.
label
);
virBufferAddLit
(
buf
,
" </permissions>
\n
"
);
virBufferVSprintf
(
buf
,
" </%s>
\n
"
,
type
);
return
0
;
}
char
*
virStorageVolDefFormat
(
virConnectPtr
conn
,
...
...
@@ -1116,37 +1181,15 @@ virStorageVolDefFormat(virConnectPtr conn,
virBufferVSprintf
(
&
buf
,
" <allocation>%llu</allocation>
\n
"
,
def
->
allocation
);
virBufferAddLit
(
&
buf
,
" <target>
\n
"
);
if
(
def
->
target
.
path
)
virBufferVSprintf
(
&
buf
,
" <path>%s</path>
\n
"
,
def
->
target
.
path
);
if
(
options
->
formatToString
)
{
const
char
*
format
=
(
options
->
formatToString
)(
def
->
target
.
format
);
if
(
!
format
)
{
virStorageReportError
(
conn
,
VIR_ERR_INTERNAL_ERROR
,
_
(
"unknown volume format number %d"
),
def
->
target
.
format
);
if
(
virStorageVolTargetDefFormat
(
conn
,
options
,
&
buf
,
&
def
->
target
,
"target"
)
<
0
)
goto
cleanup
;
}
virBufferVSprintf
(
&
buf
,
" <format type='%s'/>
\n
"
,
format
);
}
virBufferAddLit
(
&
buf
,
" <permissions>
\n
"
);
virBufferVSprintf
(
&
buf
,
" <mode>0%o</mode>
\n
"
,
def
->
target
.
perms
.
mode
);
virBufferVSprintf
(
&
buf
,
" <owner>%d</owner>
\n
"
,
def
->
target
.
perms
.
uid
);
virBufferVSprintf
(
&
buf
,
" <group>%d</group>
\n
"
,
def
->
target
.
perms
.
gid
);
if
(
def
->
target
.
perms
.
label
)
virBufferVSprintf
(
&
buf
,
" <label>%s</label>
\n
"
,
def
->
target
.
perms
.
label
);
if
(
def
->
backingStore
.
path
&&
virStorageVolTargetDefFormat
(
conn
,
options
,
&
buf
,
&
def
->
backingStore
,
"backingStore"
)
<
0
)
goto
cleanup
;
virBufferAddLit
(
&
buf
,
" </permissions>
\n
"
);
virBufferAddLit
(
&
buf
,
" </target>
\n
"
);
virBufferAddLit
(
&
buf
,
"</volume>
\n
"
);
if
(
virBufferError
(
&
buf
))
...
...
src/storage_conf.h
浏览文件 @
489fde76
...
...
@@ -89,6 +89,7 @@ struct _virStorageVolDef {
virStorageVolSource
source
;
virStorageVolTarget
target
;
virStorageVolTarget
backingStore
;
};
typedef
struct
_virStorageVolDefList
virStorageVolDefList
;
...
...
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