* Re: [PATCH] ACL supports to mqueue
[not found] <CAH-7YMmqs9j2-UTUSCZaFDEhxmjkAZvHzKVvbvy7nsG8JpFA9w@mail.gmail.com>
@ 2011-10-20 15:33 ` James Morris
2011-10-21 10:46 ` Zhou Peng
0 siblings, 1 reply; 8+ messages in thread
From: James Morris @ 2011-10-20 15:33 UTC (permalink / raw)
To: Zhou Peng
Cc: Casey Schaufler, Christoph Hellwig, linux-security-module, LKML,
linux-fsdevel
On Thu, 20 Oct 2011, Zhou Peng wrote:
> This patch adds ACL supports to mqueue filesystem.
> Based on Linux 3.0.4.
Why is this necessary, and who is planning to use it?
Are any distros likely to enable this?
- James
--
James Morris
<jmorris@namei.org>
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [PATCH] ACL supports to mqueue
2011-10-20 15:33 ` [PATCH] ACL supports to mqueue James Morris
@ 2011-10-21 10:46 ` Zhou Peng
2011-10-25 10:40 ` Zhou Peng
0 siblings, 1 reply; 8+ messages in thread
From: Zhou Peng @ 2011-10-21 10:46 UTC (permalink / raw)
To: James Morris
Cc: Casey Schaufler, Christoph Hellwig, linux-security-module, LKML,
linux-fsdevel
Thank you James for your viewing.
* In general, it can give a more fine grained and flexible DAC to msg queue obj.
* NFSARK(A distro) wants all posix ipc objects to support ACL, including mqueue.
* Posix semphore and shmem both support ACL, but mqueue as one of the
three basic ipc doesn't.
* At least, it may save one note sentence for MQ_OVERVIEW(7) ^_^
"Linux does not currently (2.6.26) support the use of access
control lists (ACLs) for POSIX message queues."
http://www.kernel.org/doc/man-pages/online/pages/man7/mq_overview.7.html
On Thu, Oct 20, 2011 at 11:33 PM, James Morris <jmorris@namei.org> wrote:
> On Thu, 20 Oct 2011, Zhou Peng wrote:
>
>> This patch adds ACL supports to mqueue filesystem.
>> Based on Linux 3.0.4.
>
> Why is this necessary, and who is planning to use it?
>
> Are any distros likely to enable this?
>
>
> - James
> --
> James Morris
> <jmorris@namei.org>
>
--
Zhou Peng
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [PATCH] ACL supports to mqueue
2011-10-21 10:46 ` Zhou Peng
@ 2011-10-25 10:40 ` Zhou Peng
2011-10-27 6:20 ` James Morris
0 siblings, 1 reply; 8+ messages in thread
From: Zhou Peng @ 2011-10-25 10:40 UTC (permalink / raw)
To: James Morris
Cc: Casey Schaufler, Christoph Hellwig, linux-security-module, LKML,
linux-fsdevel, security
Hi, how about this patch pls?
On Fri, Oct 21, 2011 at 6:46 PM, Zhou Peng <ailvpeng25@gmail.com> wrote:
> * In general, it can give a more fine grained and flexible DAC to msg queue obj.
> * NFSARK(A distro) wants all posix ipc objects to support ACL, including mqueue.
> * Posix semphore and shmem both support ACL, but mqueue as one of the
> three basic ipc doesn't.
> * At least, it may save one note sentence for MQ_OVERVIEW(7) ^_^
> "Linux does not currently (2.6.26) support the use of access
> control lists (ACLs) for POSIX message queues."
> http://www.kernel.org/doc/man-pages/online/pages/man7/mq_overview.7.html
>
> On Thu, Oct 20, 2011 at 11:33 PM, James Morris <jmorris@namei.org> wrote:
> > On Thu, 20 Oct 2011, Zhou Peng wrote:
> >
> >> This patch adds ACL supports to mqueue filesystem.
> >> Based on Linux 3.0.4.
> >
> > Why is this necessary, and who is planning to use it?
> >
> > Are any distros likely to enable this?
> >
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] ACL supports to mqueue
2011-10-25 10:40 ` Zhou Peng
@ 2011-10-27 6:20 ` James Morris
2011-10-27 23:47 ` James Morris
0 siblings, 1 reply; 8+ messages in thread
From: James Morris @ 2011-10-27 6:20 UTC (permalink / raw)
To: Zhou Peng
Cc: Casey Schaufler, Christoph Hellwig, linux-security-module, LKML,
linux-fsdevel, security
[-- Attachment #1: Type: TEXT/PLAIN, Size: 1154 bytes --]
On Tue, 25 Oct 2011, Zhou Peng wrote:
> Hi, how about this patch pls?
I'm not convinced that this is a necessary feature for the mainline
kernel.
>
> On Fri, Oct 21, 2011 at 6:46 PM, Zhou Peng <ailvpeng25@gmail.com> wrote:
> > * In general, it can give a more fine grained and flexible DAC to msg queue obj.
> > * NFSARK(A distro) wants all posix ipc objects to support ACL, including mqueue.
> > * Posix semphore and shmem both support ACL, but mqueue as one of the
> > three basic ipc doesn't.
> > * At least, it may save one note sentence for MQ_OVERVIEW(7) ^_^
> > "Linux does not currently (2.6.26) support the use of access
> > control lists (ACLs) for POSIX message queues."
> > http://www.kernel.org/doc/man-pages/online/pages/man7/mq_overview.7.html
> >
> > On Thu, Oct 20, 2011 at 11:33 PM, James Morris <jmorris@namei.org> wrote:
> > > On Thu, 20 Oct 2011, Zhou Peng wrote:
> > >
> > >> This patch adds ACL supports to mqueue filesystem.
> > >> Based on Linux 3.0.4.
> > >
> > > Why is this necessary, and who is planning to use it?
> > >
> > > Are any distros likely to enable this?
> > >
>
--
James Morris
<jmorris@namei.org>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] ACL supports to mqueue
2011-10-27 6:20 ` James Morris
@ 2011-10-27 23:47 ` James Morris
2011-11-02 2:37 ` Zhou Peng
0 siblings, 1 reply; 8+ messages in thread
From: James Morris @ 2011-10-27 23:47 UTC (permalink / raw)
To: Zhou Peng
Cc: Casey Schaufler, Christoph Hellwig, linux-security-module, LKML,
linux-fsdevel
[-- Attachment #1: Type: TEXT/PLAIN, Size: 1505 bytes --]
On Thu, 27 Oct 2011, James Morris wrote:
> On Tue, 25 Oct 2011, Zhou Peng wrote:
>
> > Hi, how about this patch pls?
>
> I'm not convinced that this is a necessary feature for the mainline
> kernel.
It also needs more review, from at least other security folk, and ideally
also from fs/vfs folk.
Why does NFSARK want this supportr? Are its users asking for it? (I
couldn't find the distro, btw).
>
> >
> > On Fri, Oct 21, 2011 at 6:46 PM, Zhou Peng <ailvpeng25@gmail.com> wrote:
> > > * In general, it can give a more fine grained and flexible DAC to msg queue obj.
> > > * NFSARK(A distro) wants all posix ipc objects to support ACL, including mqueue.
> > > * Posix semphore and shmem both support ACL, but mqueue as one of the
> > > three basic ipc doesn't.
> > > * At least, it may save one note sentence for MQ_OVERVIEW(7) ^_^
> > > "Linux does not currently (2.6.26) support the use of access
> > > control lists (ACLs) for POSIX message queues."
> > > http://www.kernel.org/doc/man-pages/online/pages/man7/mq_overview.7.html
> > >
> > > On Thu, Oct 20, 2011 at 11:33 PM, James Morris <jmorris@namei.org> wrote:
> > > > On Thu, 20 Oct 2011, Zhou Peng wrote:
> > > >
> > > >> This patch adds ACL supports to mqueue filesystem.
> > > >> Based on Linux 3.0.4.
> > > >
> > > > Why is this necessary, and who is planning to use it?
> > > >
> > > > Are any distros likely to enable this?
> > > >
> >
>
> --
> James Morris
> <jmorris@namei.org>
--
James Morris
<jmorris@namei.org>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] ACL supports to mqueue
2011-10-27 23:47 ` James Morris
@ 2011-11-02 2:37 ` Zhou Peng
[not found] ` <201111032026.FIF95800.HOJFOFFtQMSVLO@I-love.SAKURA.ne.jp>
0 siblings, 1 reply; 8+ messages in thread
From: Zhou Peng @ 2011-11-02 2:37 UTC (permalink / raw)
To: James Morris
Cc: Alexander Viro, Chris Wright, Hugh Dickins, Stephen Smalley,
Kentaro Takeda, Tetsuo Handa, John Johansen, Casey Schaufler,
Christoph Hellwig, linux-security-module, LKML, linux-fsdevel,
linux-mm
Sorry for late reply, the mail skiped the inbox
and to the lkml label directly of gmail.
On Fri, Oct 28, 2011 at 7:47 AM, James Morris <jmorris@namei.org> wrote:
> On Thu, 27 Oct 2011, James Morris wrote:
>
>> On Tue, 25 Oct 2011, Zhou Peng wrote:
>>
>> > Hi, how about this patch pls?
>>
>> I'm not convinced that this is a necessary feature for the mainline
>> kernel.
>
> It also needs more review, from at least other security folk, and ideally
> also from fs/vfs folk.
Thank you James.
I cc to Alexander Viro (VFS),
Chris Wright (LSM),
Hugh Dickins (TMPFS),
Stephen Smalley (SELINUX),
Kentaro Takeda, Tetsuo Handa (TOMOYO),
John Johansen (APPARMOR)
Hope any review
> Why does NFSARK want this supportr? Are its users asking for it? (I
> couldn't find the distro, btw).
Yes, it's user asks for acl for ipc,
It is a distro by nfschina.
>>
>> >
>> > On Fri, Oct 21, 2011 at 6:46 PM, Zhou Peng <ailvpeng25@gmail.com> wrote:
>> > > * In general, it can give a more fine grained and flexible DAC to msg queue obj.
>> > > * NFSARK(A distro) wants all posix ipc objects to support ACL, including mqueue.
>> > > * Posix semphore and shmem both support ACL, but mqueue as one of the
>> > > three basic ipc doesn't.
>> > > * At least, it may save one note sentence for MQ_OVERVIEW(7) ^_^
>> > > "Linux does not currently (2.6.26) support the use of access
>> > > control lists (ACLs) for POSIX message queues."
>> > > http://www.kernel.org/doc/man-pages/online/pages/man7/mq_overview.7.html
>> > >
>> > > On Thu, Oct 20, 2011 at 11:33 PM, James Morris <jmorris@namei.org> wrote:
>> > > > On Thu, 20 Oct 2011, Zhou Peng wrote:
>> > > >
>> > > >> This patch adds ACL supports to mqueue filesystem.
>> > > >> Based on Linux 3.0.4.
>> > > >
>> > > > Why is this necessary, and who is planning to use it?
>> > > >
>> > > > Are any distros likely to enable this?
--
Zhou Peng
--
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^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH] ACL supports to mqueue
@ 2011-10-20 2:39 Zhou Peng
0 siblings, 0 replies; 8+ messages in thread
From: Zhou Peng @ 2011-10-20 2:39 UTC (permalink / raw)
To: Casey Schaufler, Christoph Hellwig, linux-security-module, LKML,
linux-fsdevel <linux-fsde
[-- Attachment #1: Type: text/plain, Size: 4697 bytes --]
This patch adds ACL supports to mqueue filesystem.
Based on Linux 3.0.4.
Signed-off-by: Zhou Peng <zhoupeng@nfs.iscas.ac.cn>
diff --git a/fs/Kconfig b/fs/Kconfig
index 19891aa..dbf0aca 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -151,6 +151,14 @@ config TMPFS_XATTR
If unsure, say N.
+config MQUEUE_POSIX_ACL
+ bool "Mqueue POSIX Access Control Lists support"
+ depends on POSIX_MQUEUE
+ select GENERIC_ACL
+ help
+ Mqueue is a file system which is used to suport POSIX msg queue.
+ Say y to get Access Control Lists support for mqueue file system.
+
config HUGETLBFS
bool "HugeTLB file system support"
depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 14fb6d6..e9d7ea9 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -10,6 +10,9 @@
*
* Audit: George Wilson (ltcgcw@us.ibm.com)
*
+ * ACL:
+ * Copyright (c) 2011 Zhou Peng (ailvpeng25@gmail.com)
+ *
* This file is released under the GPL.
*/
@@ -33,6 +36,9 @@
#include <linux/pid.h>
#include <linux/ipc_namespace.h>
#include <linux/slab.h>
+#include <linux/xattr.h>
+#include <linux/posix_acl.h>
+#include <linux/generic_acl.h>
#include <net/sock.h>
#include "util.h"
@@ -76,6 +82,9 @@ struct mqueue_inode_info {
};
static const struct inode_operations mqueue_dir_inode_operations;
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+static const struct inode_operations mqueue_inode_operations;
+#endif
static const struct file_operations mqueue_file_operations;
static const struct super_operations mqueue_super_ops;
static void remove_notification(struct mqueue_inode_info *info);
@@ -84,6 +93,14 @@ static struct kmem_cache *mqueue_inode_cachep;
static struct ctl_table_header * mq_sysctl_table;
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+static const struct xattr_handler *mqueue_xattr_handlers[] = {
+ &generic_acl_access_handler,
+ &generic_acl_default_handler,
+ NULL
+};
+#endif
+
static inline struct mqueue_inode_info *MQUEUE_I(struct inode *inode)
{
return container_of(inode, struct mqueue_inode_info, vfs_inode);
@@ -122,12 +139,19 @@ static struct inode *mqueue_get_inode(struct
super_block *sb,
inode->i_gid = current_fsgid();
inode->i_mtime = inode->i_ctime = inode->i_atime =
CURRENT_TIME;
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+ cache_no_acl(inode);
+#endif
if (S_ISREG(mode)) {
struct mqueue_inode_info *info;
struct task_struct *p = current;
unsigned long mq_bytes, mq_msg_tblsz;
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+ inode->i_op = &mqueue_inode_operations;
+#endif
+
inode->i_fop = &mqueue_file_operations;
inode->i_size = FILENT_SIZE;
/* mqueue specific info */
@@ -192,6 +216,11 @@ static int mqueue_fill_super(struct super_block
*sb, void *data, int silent)
sb->s_magic = MQUEUE_MAGIC;
sb->s_op = &mqueue_super_ops;
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+ sb->s_xattr = mqueue_xattr_handlers;
+ sb->s_flags |= MS_POSIXACL;
+#endif
+
inode = mqueue_get_inode(sb, ns, S_IFDIR | S_ISVTX | S_IRWXUGO,
NULL);
if (!inode) {
@@ -322,6 +351,16 @@ static int mqueue_create(struct inode *dir,
struct dentry *dentry,
goto out_unlock;
}
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+ error = generic_acl_init(inode, dir);
+ if (error) {
+ iput(inode);
+ spin_lock(&mq_lock);
+ ipc_ns->mq_queues_count--;
+ goto out_unlock;
+ }
+#endif
+
put_ipc_ns(ipc_ns);
dir->i_size += DIRENT_SIZE;
dir->i_ctime = dir->i_mtime = dir->i_atime = CURRENT_TIME;
@@ -1217,10 +1256,46 @@ out:
return ret;
}
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+static int mqueue_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ struct inode *inode = dentry->d_inode;
+ int error;
+
+ error = simple_setattr(dentry, attr);
+ if (error)
+ return error;
+
+ if (attr->ia_valid & ATTR_MODE)
+ error = generic_acl_chmod(inode);
+
+ return error;
+}
+#endif
+
static const struct inode_operations mqueue_dir_inode_operations = {
.lookup = simple_lookup,
.create = mqueue_create,
.unlink = mqueue_unlink,
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = generic_listxattr,
+ .removexattr = generic_removexattr,
+ .check_acl = generic_check_acl,
+ .setattr = mqueue_setattr,
+#endif
+};
+
+static const struct inode_operations mqueue_inode_operations = {
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = generic_listxattr,
+ .removexattr = generic_removexattr,
+ .check_acl = generic_check_acl,
+ .setattr = mqueue_setattr,
+#endif
};
static const struct file_operations mqueue_file_operations = {
--
Zhou Peng
[-- Attachment #2: posix_msg_queue_acl_linux 3.0.4.diff --]
[-- Type: text/x-patch, Size: 4696 bytes --]
This patch adds ACL supports to mqueue filesystem.
Based on Linux 3.0.4.
Signed-off-by: Zhou Peng <zhoupeng@nfs.iscas.ac.cn>
diff --git a/fs/Kconfig b/fs/Kconfig
index 19891aa..dbf0aca 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -151,6 +151,14 @@ config TMPFS_XATTR
If unsure, say N.
+config MQUEUE_POSIX_ACL
+ bool "Mqueue POSIX Access Control Lists support"
+ depends on POSIX_MQUEUE
+ select GENERIC_ACL
+ help
+ Mqueue is a file system which is used to suport POSIX msg queue.
+ Say y to get Access Control Lists support for mqueue file system.
+
config HUGETLBFS
bool "HugeTLB file system support"
depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 14fb6d6..e9d7ea9 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -10,6 +10,9 @@
*
* Audit: George Wilson (ltcgcw@us.ibm.com)
*
+ * ACL:
+ * Copyright (c) 2011 Zhou Peng (ailvpeng25@gmail.com)
+ *
* This file is released under the GPL.
*/
@@ -33,6 +36,9 @@
#include <linux/pid.h>
#include <linux/ipc_namespace.h>
#include <linux/slab.h>
+#include <linux/xattr.h>
+#include <linux/posix_acl.h>
+#include <linux/generic_acl.h>
#include <net/sock.h>
#include "util.h"
@@ -76,6 +82,9 @@ struct mqueue_inode_info {
};
static const struct inode_operations mqueue_dir_inode_operations;
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+static const struct inode_operations mqueue_inode_operations;
+#endif
static const struct file_operations mqueue_file_operations;
static const struct super_operations mqueue_super_ops;
static void remove_notification(struct mqueue_inode_info *info);
@@ -84,6 +93,14 @@ static struct kmem_cache *mqueue_inode_cachep;
static struct ctl_table_header * mq_sysctl_table;
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+static const struct xattr_handler *mqueue_xattr_handlers[] = {
+ &generic_acl_access_handler,
+ &generic_acl_default_handler,
+ NULL
+};
+#endif
+
static inline struct mqueue_inode_info *MQUEUE_I(struct inode *inode)
{
return container_of(inode, struct mqueue_inode_info, vfs_inode);
@@ -122,12 +139,19 @@ static struct inode *mqueue_get_inode(struct super_block *sb,
inode->i_gid = current_fsgid();
inode->i_mtime = inode->i_ctime = inode->i_atime =
CURRENT_TIME;
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+ cache_no_acl(inode);
+#endif
if (S_ISREG(mode)) {
struct mqueue_inode_info *info;
struct task_struct *p = current;
unsigned long mq_bytes, mq_msg_tblsz;
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+ inode->i_op = &mqueue_inode_operations;
+#endif
+
inode->i_fop = &mqueue_file_operations;
inode->i_size = FILENT_SIZE;
/* mqueue specific info */
@@ -192,6 +216,11 @@ static int mqueue_fill_super(struct super_block *sb, void *data, int silent)
sb->s_magic = MQUEUE_MAGIC;
sb->s_op = &mqueue_super_ops;
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+ sb->s_xattr = mqueue_xattr_handlers;
+ sb->s_flags |= MS_POSIXACL;
+#endif
+
inode = mqueue_get_inode(sb, ns, S_IFDIR | S_ISVTX | S_IRWXUGO,
NULL);
if (!inode) {
@@ -322,6 +351,16 @@ static int mqueue_create(struct inode *dir, struct dentry *dentry,
goto out_unlock;
}
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+ error = generic_acl_init(inode, dir);
+ if (error) {
+ iput(inode);
+ spin_lock(&mq_lock);
+ ipc_ns->mq_queues_count--;
+ goto out_unlock;
+ }
+#endif
+
put_ipc_ns(ipc_ns);
dir->i_size += DIRENT_SIZE;
dir->i_ctime = dir->i_mtime = dir->i_atime = CURRENT_TIME;
@@ -1217,10 +1256,46 @@ out:
return ret;
}
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+static int mqueue_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ struct inode *inode = dentry->d_inode;
+ int error;
+
+ error = simple_setattr(dentry, attr);
+ if (error)
+ return error;
+
+ if (attr->ia_valid & ATTR_MODE)
+ error = generic_acl_chmod(inode);
+
+ return error;
+}
+#endif
+
static const struct inode_operations mqueue_dir_inode_operations = {
.lookup = simple_lookup,
.create = mqueue_create,
.unlink = mqueue_unlink,
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = generic_listxattr,
+ .removexattr = generic_removexattr,
+ .check_acl = generic_check_acl,
+ .setattr = mqueue_setattr,
+#endif
+};
+
+static const struct inode_operations mqueue_inode_operations = {
+#ifdef CONFIG_MQUEUE_POSIX_ACL
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = generic_listxattr,
+ .removexattr = generic_removexattr,
+ .check_acl = generic_check_acl,
+ .setattr = mqueue_setattr,
+#endif
};
static const struct file_operations mqueue_file_operations = {
^ permalink raw reply related [flat|nested] 8+ messages in thread
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[not found] <CAH-7YMmqs9j2-UTUSCZaFDEhxmjkAZvHzKVvbvy7nsG8JpFA9w@mail.gmail.com>
2011-10-20 15:33 ` [PATCH] ACL supports to mqueue James Morris
2011-10-21 10:46 ` Zhou Peng
2011-10-25 10:40 ` Zhou Peng
2011-10-27 6:20 ` James Morris
2011-10-27 23:47 ` James Morris
2011-11-02 2:37 ` Zhou Peng
[not found] ` <201111032026.FIF95800.HOJFOFFtQMSVLO@I-love.SAKURA.ne.jp>
2011-11-04 2:15 ` Zhou Peng
2011-10-20 2:39 Zhou Peng
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