Home » Mailing lists » Devel » [RFC][PATCH 4/5] utsname namespaces: sysctl hack
| [RFC][PATCH 4/5] utsname namespaces: sysctl hack [message #2483] |
Fri, 07 April 2006 18:36  |
serue
Messages: 750
Registered: February 2006
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Senior Member |
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Sysctl uts patch. This clearly will need to be done another way, but
since sysctl itself needs to be container aware, 'the right thing' is
a separate patchset.
Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
---
kernel/sysctl.c | 38 ++++++++++++++++++++++++++++----------
1 files changed, 28 insertions(+), 10 deletions(-)
40f7e1320c82efb6e875fc3bf44408cdfd093f21
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index e82726f..c2b18ef 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -233,8 +233,8 @@ static ctl_table kern_table[] = {
{
.ctl_name = KERN_OSTYPE,
.procname = "ostype",
- .data = system_utsname.sysname,
- .maxlen = sizeof(system_utsname.sysname),
+ .data = init_uts_ns.name.sysname,
+ .maxlen = sizeof(init_uts_ns.name.sysname),
.mode = 0444,
.proc_handler = &proc_doutsstring,
.strategy = &sysctl_string,
@@ -242,8 +242,8 @@ static ctl_table kern_table[] = {
{
.ctl_name = KERN_OSRELEASE,
.procname = "osrelease",
- .data = system_utsname.release,
- .maxlen = sizeof(system_utsname.release),
+ .data = init_uts_ns.name.release,
+ .maxlen = sizeof(init_uts_ns.name.release),
.mode = 0444,
.proc_handler = &proc_doutsstring,
.strategy = &sysctl_string,
@@ -251,8 +251,8 @@ static ctl_table kern_table[] = {
{
.ctl_name = KERN_VERSION,
.procname = "version",
- .data = system_utsname.version,
- .maxlen = sizeof(system_utsname.version),
+ .data = init_uts_ns.name.version,
+ .maxlen = sizeof(init_uts_ns.name.version),
.mode = 0444,
.proc_handler = &proc_doutsstring,
.strategy = &sysctl_string,
@@ -260,8 +260,8 @@ static ctl_table kern_table[] = {
{
.ctl_name = KERN_NODENAME,
.procname = "hostname",
- .data = system_utsname.nodename,
- .maxlen = sizeof(system_utsname.nodename),
+ .data = init_uts_ns.name.nodename,
+ .maxlen = sizeof(init_uts_ns.name.nodename),
.mode = 0644,
.proc_handler = &proc_doutsstring,
.strategy = &sysctl_string,
@@ -269,8 +269,8 @@ static ctl_table kern_table[] = {
{
.ctl_name = KERN_DOMAINNAME,
.procname = "domainname",
- .data = system_utsname.domainname,
- .maxlen = sizeof(system_utsname.domainname),
+ .data = init_uts_ns.name.domainname,
+ .maxlen = sizeof(init_uts_ns.name.domainname),
.mode = 0644,
.proc_handler = &proc_doutsstring,
.strategy = &sysctl_string,
@@ -1619,6 +1619,24 @@ static int proc_doutsstring(ctl_table *t
{
int r;
+ switch (table->ctl_name) {
+ case KERN_OSTYPE:
+ table->data = utsname()->sysname;
+ break;
+ case KERN_OSRELEASE:
+ table->data = utsname()->release;
+ break;
+ case KERN_VERSION:
+ table->data = utsname()->version;
+ break;
+ case KERN_NODENAME:
+ table->data = utsname()->nodename;
+ break;
+ case KERN_DOMAINNAME:
+ table->data = utsname()->domainname;
+ break;
+ }
+
if (!write) {
down_read(&uts_sem);
r=proc_dostring(table,0,filp,buffer,lenp, ppos);
--
1.2.4
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| Re: [RFC][PATCH 4/5] utsname namespaces: sysctl hack [message #2750 is a reply to message #2483] |
Wed, 19 April 2006 15:10  |
dev
Messages: 1693
Registered: September 2005
Location: Moscow
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Senior Member |
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Serge,
can we do nothing with sysctls at this moment, instead of commiting hacks?
Thanks,
Kirill
> Sysctl uts patch. This clearly will need to be done another way, but
> since sysctl itself needs to be container aware, 'the right thing' is
> a separate patchset.
>
> Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
> ---
> kernel/sysctl.c | 38 ++++++++++++++++++++++++++++----------
> 1 files changed, 28 insertions(+), 10 deletions(-)
>
> 40f7e1320c82efb6e875fc3bf44408cdfd093f21
> diff --git a/kernel/sysctl.c b/kernel/sysctl.c
> index e82726f..c2b18ef 100644
> --- a/kernel/sysctl.c
> +++ b/kernel/sysctl.c
> @@ -233,8 +233,8 @@ static ctl_table kern_table[] = {
> {
> .ctl_name = KERN_OSTYPE,
> .procname = "ostype",
> - .data = system_utsname.sysname,
> - .maxlen = sizeof(system_utsname.sysname),
> + .data = init_uts_ns.name.sysname,
> + .maxlen = sizeof(init_uts_ns.name.sysname),
> .mode = 0444,
> .proc_handler = &proc_doutsstring,
> .strategy = &sysctl_string,
> @@ -242,8 +242,8 @@ static ctl_table kern_table[] = {
> {
> .ctl_name = KERN_OSRELEASE,
> .procname = "osrelease",
> - .data = system_utsname.release,
> - .maxlen = sizeof(system_utsname.release),
> + .data = init_uts_ns.name.release,
> + .maxlen = sizeof(init_uts_ns.name.release),
> .mode = 0444,
> .proc_handler = &proc_doutsstring,
> .strategy = &sysctl_string,
> @@ -251,8 +251,8 @@ static ctl_table kern_table[] = {
> {
> .ctl_name = KERN_VERSION,
> .procname = "version",
> - .data = system_utsname.version,
> - .maxlen = sizeof(system_utsname.version),
> + .data = init_uts_ns.name.version,
> + .maxlen = sizeof(init_uts_ns.name.version),
> .mode = 0444,
> .proc_handler = &proc_doutsstring,
> .strategy = &sysctl_string,
> @@ -260,8 +260,8 @@ static ctl_table kern_table[] = {
> {
> .ctl_name = KERN_NODENAME,
> .procname = "hostname",
> - .data = system_utsname.nodename,
> - .maxlen = sizeof(system_utsname.nodename),
> + .data = init_uts_ns.name.nodename,
> + .maxlen = sizeof(init_uts_ns.name.nodename),
> .mode = 0644,
> .proc_handler = &proc_doutsstring,
> .strategy = &sysctl_string,
> @@ -269,8 +269,8 @@ static ctl_table kern_table[] = {
> {
> .ctl_name = KERN_DOMAINNAME,
> .procname = "domainname",
> - .data = system_utsname.domainname,
> - .maxlen = sizeof(system_utsname.domainname),
> + .data = init_uts_ns.name.domainname,
> + .maxlen = sizeof(init_uts_ns.name.domainname),
> .mode = 0644,
> .proc_handler = &proc_doutsstring,
> .strategy = &sysctl_string,
> @@ -1619,6 +1619,24 @@ static int proc_doutsstring(ctl_table *t
> {
> int r;
>
> + switch (table->ctl_name) {
> + case KERN_OSTYPE:
> + table->data = utsname()->sysname;
> + break;
> + case KERN_OSRELEASE:
> + table->data = utsname()->release;
> + break;
> + case KERN_VERSION:
> + table->data = utsname()->version;
> + break;
> + case KERN_NODENAME:
> + table->data = utsname()->nodename;
> + break;
> + case KERN_DOMAINNAME:
> + table->data = utsname()->domainname;
> + break;
> + }
> +
> if (!write) {
> down_read(&uts_sem);
> r=proc_dostring(table,0,filp,buffer,lenp, ppos);
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| Re: [RFC][PATCH 4/5] utsname namespaces: sysctl hack [message #2751 is a reply to message #2750] |
Wed, 19 April 2006 15:21 |
serue
Messages: 750
Registered: February 2006
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Senior Member |
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Quoting Kirill Korotaev (dev@sw.ru):
> Serge,
>
> can we do nothing with sysctls at this moment, instead of commiting hacks?
Please look closer at the patch.
I *am* doing nothing with sysctls.
system_utsname no longer exists, and the way to get to that is by using
init_uts_ns.name. That's all this does.
-serge
>
> Thanks,
> Kirill
>
> >Sysctl uts patch. This clearly will need to be done another way, but
> >since sysctl itself needs to be container aware, 'the right thing' is
> >a separate patchset.
> >
> >Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
> >---
> > kernel/sysctl.c | 38 ++++++++++++++++++++++++++++----------
> > 1 files changed, 28 insertions(+), 10 deletions(-)
> >
> >40f7e1320c82efb6e875fc3bf44408cdfd093f21
> >diff --git a/kernel/sysctl.c b/kernel/sysctl.c
> >index e82726f..c2b18ef 100644
> >--- a/kernel/sysctl.c
> >+++ b/kernel/sysctl.c
> >@@ -233,8 +233,8 @@ static ctl_table kern_table[] = {
> > {
> > .ctl_name = KERN_OSTYPE,
> > .procname = "ostype",
> >- .data = system_utsname.sysname,
> >- .maxlen = sizeof(system_utsname.sysname),
> >+ .data = init_uts_ns.name.sysname,
> >+ .maxlen = sizeof(init_uts_ns.name.sysname),
> > .mode = 0444,
> > .proc_handler = &proc_doutsstring,
> > .strategy = &sysctl_string,
> >@@ -242,8 +242,8 @@ static ctl_table kern_table[] = {
> > {
> > .ctl_name = KERN_OSRELEASE,
> > .procname = "osrelease",
> >- .data = system_utsname.release,
> >- .maxlen = sizeof(system_utsname.release),
> >+ .data = init_uts_ns.name.release,
> >+ .maxlen = sizeof(init_uts_ns.name.release),
> > .mode = 0444,
> > .proc_handler = &proc_doutsstring,
> > .strategy = &sysctl_string,
> >@@ -251,8 +251,8 @@ static ctl_table kern_table[] = {
> > {
> > .ctl_name = KERN_VERSION,
> > .procname = "version",
> >- .data = system_utsname.version,
> >- .maxlen = sizeof(system_utsname.version),
> >+ .data = init_uts_ns.name.version,
> >+ .maxlen = sizeof(init_uts_ns.name.version),
> > .mode = 0444,
> > .proc_handler = &proc_doutsstring,
> > .strategy = &sysctl_string,
> >@@ -260,8 +260,8 @@ static ctl_table kern_table[] = {
> > {
> > .ctl_name = KERN_NODENAME,
> > .procname = "hostname",
> >- .data = system_utsname.nodename,
> >- .maxlen = sizeof(system_utsname.nodename),
> >+ .data = init_uts_ns.name.nodename,
> >+ .maxlen = sizeof(init_uts_ns.name.nodename),
> > .mode = 0644,
> > .proc_handler = &proc_doutsstring,
> > .strategy = &sysctl_string,
> >@@ -269,8 +269,8 @@ static ctl_table kern_table[] = {
> > {
> > .ctl_name = KERN_DOMAINNAME,
> > .procname = "domainname",
> >- .data = system_utsname.domainname,
> >- .maxlen = sizeof(system_utsname.domainname),
> >+ .data = init_uts_ns.name.domainname,
> >+ .maxlen = sizeof(init_uts_ns.name.domainname),
> > .mode = 0644,
> > .proc_handler = &proc_doutsstring,
> > .strategy = &sysctl_string,
> >@@ -1619,6 +1619,24 @@ static int proc_doutsstring(ctl_table *t
> > {
> > int r;
> >
> >+ switch (table->ctl_name) {
> >+ case KERN_OSTYPE:
> >+ table->data = utsname()->sysname;
> >+ break;
> >+ case KERN_OSRELEASE:
> >+ table->data = utsname()->release;
> >+ break;
> >+ case KERN_VERSION:
> >+ table->data = utsname()->version;
> >+ break;
> >+ case KERN_NODENAME:
> >+ table->data = utsname()->nodename;
> >+ break;
> >+ case KERN_DOMAINNAME:
> >+ table->data = utsname()->domainname;
> >+ break;
> >+ }
> >+
> > if (!write) {
> > down_read(&uts_sem);
> > r=proc_dostring(table,0,filp,buffer,lenp, ppos);
>
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| Re: [RFC][PATCH 4/5] utsname namespaces: sysctl hack [message #2754 is a reply to message #2751] |
Wed, 19 April 2006 15:43 |
dev
Messages: 1693
Registered: September 2005
Location: Moscow
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Senior Member |
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Serge,
> Please look closer at the patch.
> I *am* doing nothing with sysctls.
>
> system_utsname no longer exists, and the way to get to that is by using
> init_uts_ns.name. That's all this does.
Sorry for being not concrete enough.
I mean switch () in the code. Until we decided how to virtualize
sysctls/proc, I believe no dead code/hacks should be commited. IMHO.
FYI, I strongly object against virtualizing sysctls this way as it is
not flexible and is a real hack from my POV.
Sure, change of system_utsname.sysname -> init_uts_ns.name.sysname is Ok.
Thanks,
Kirill
>>>Sysctl uts patch. This clearly will need to be done another way, but
>>>since sysctl itself needs to be container aware, 'the right thing' is
>>>a separate patchset.
>>>
>>>Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
>>>---
>>>kernel/sysctl.c | 38 ++++++++++++++++++++++++++++----------
>>>1 files changed, 28 insertions(+), 10 deletions(-)
>>>
>>>40f7e1320c82efb6e875fc3bf44408cdfd093f21
>>>diff --git a/kernel/sysctl.c b/kernel/sysctl.c
>>>index e82726f..c2b18ef 100644
>>>--- a/kernel/sysctl.c
>>>+++ b/kernel/sysctl.c
>>>@@ -233,8 +233,8 @@ static ctl_table kern_table[] = {
>>> {
>>> .ctl_name = KERN_OSTYPE,
>>> .procname = "ostype",
>>>- .data = system_utsname.sysname,
>>>- .maxlen = sizeof(system_utsname.sysname),
>>>+ .data = init_uts_ns.name.sysname,
>>>+ .maxlen = sizeof(init_uts_ns.name.sysname),
>>> .mode = 0444,
>>> .proc_handler = &proc_doutsstring,
>>> .strategy = &sysctl_string,
>>>@@ -242,8 +242,8 @@ static ctl_table kern_table[] = {
>>> {
>>> .ctl_name = KERN_OSRELEASE,
>>> .procname = "osrelease",
>>>- .data = system_utsname.release,
>>>- .maxlen = sizeof(system_utsname.release),
>>>+ .data = init_uts_ns.name.release,
>>>+ .maxlen = sizeof(init_uts_ns.name.release),
>>> .mode = 0444,
>>> .proc_handler = &proc_doutsstring,
>>> .strategy = &sysctl_string,
>>>@@ -251,8 +251,8 @@ static ctl_table kern_table[] = {
>>> {
>>> .ctl_name = KERN_VERSION,
>>> .procname = "version",
>>>- .data = system_utsname.version,
>>>- .maxlen = sizeof(system_utsname.version),
>>>+ .data = init_uts_ns.name.version,
>>>+ .maxlen = sizeof(init_uts_ns.name.version),
>>> .mode = 0444,
>>> .proc_handler = &proc_doutsstring,
>>> .strategy = &sysctl_string,
>>>@@ -260,8 +260,8 @@ static ctl_table kern_table[] = {
>>> {
>>> .ctl_name = KERN_NODENAME,
>>> .procname = "hostname",
>>>- .data = system_utsname.nodename,
>>>- .maxlen = sizeof(system_utsname.nodename),
>>>+ .data = init_uts_ns.name.nodename,
>>>+ .maxlen = sizeof(init_uts_ns.name.nodename),
>>> .mode = 0644,
>>> .proc_handler = &proc_doutsstring,
>>> .strategy = &sysctl_string,
>>>@@ -269,8 +269,8 @@ static ctl_table kern_table[] = {
>>> {
>>> .ctl_name = KERN_DOMAINNAME,
>>> .procname = "domainname",
>>>- .data = system_utsname.domainname,
>>>- .maxlen = sizeof(system_utsname.domainname),
>>>+ .data = init_uts_ns.name.domainname,
>>>+ .maxlen = sizeof(init_uts_ns.name.domainname),
>>> .mode = 0644,
>>> .proc_handler = &proc_doutsstring,
>>> .strategy = &sysctl_string,
>>>@@ -1619,6 +1619,24 @@ static int proc_doutsstring(ctl_table *t
>>>{
>>> int r;
>>>
>>>+ switch (table->ctl_name) {
>>>+ case KERN_OSTYPE:
>>>+ table->data = utsname()->sysname;
>>>+ break;
>>>+ case KERN_OSRELEASE:
>>>+ table->data = utsname()->release;
>>>+ break;
>>>+ case KERN_VERSION:
>>>+ table->data = utsname()->version;
>>>+ break;
>>>+ case KERN_NODENAME:
>>>+ table->data = utsname()->nodename;
>>>+ break;
>>>+ case KERN_DOMAINNAME:
>>>+ table->data = utsname()->domainname;
>>>+ break;
>>>+ }
>>>+
>>> if (!write) {
>>> down_read(&uts_sem);
>>> r=proc_dostring(table,0,filp,buffer,lenp, ppos);
>>
>
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| Re: [RFC][PATCH 4/5] utsname namespaces: sysctl hack [message #2759 is a reply to message #2754] |
Wed, 19 April 2006 17:10 |
serue
Messages: 750
Registered: February 2006
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Senior Member |
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Quoting Kirill Korotaev (dev@sw.ru):
> Serge,
>
> >Please look closer at the patch.
> >I *am* doing nothing with sysctls.
> >
> >system_utsname no longer exists, and the way to get to that is by using
> >init_uts_ns.name. That's all this does.
> Sorry for being not concrete enough.
> I mean switch () in the code. Until we decided how to virtualize
> sysctls/proc, I believe no dead code/hacks should be commited. IMHO.
>
> FYI, I strongly object against virtualizing sysctls this way as it is
> not flexible and is a real hack from my POV.
Oops, I forgot that was there!
Sorry.
Yup, I'm fine with leaving that out. After all, nothing in the
non-debugging patchset allows userspace to clone the utsnamespace yet,
so it's tough to argue that leaving out that switch impacts
functionality :)
I believe Dave is working on a more acceptable sysctl adaptation, though
I'm not sure when he'll have a patch to submit. In any case, one clear
concise piece at a time.
thanks,
-serge
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| Re: [RFC][PATCH 4/5] utsname namespaces: sysctl hack [message #2761 is a reply to message #2758] |
Wed, 19 April 2006 17:19 |
Dave Hansen
Messages: 240
Registered: October 2005
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Senior Member |
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On Wed, 2006-04-19 at 10:52 -0600, Eric W. Biederman wrote:
> Dave Hansen <haveblue@us.ibm.com> writes:
>
> > Besides ipc and utsnames, can anybody think of some other things in
> > sysctl that we really need to virtualize?
>
> All of the networking entries.
...
> Only in that you attacked the wrong piece of the puzzle.
> The strategy table entries simply need to die, or be rewritten
> to use the appropriate proc entries.
If we are limited to ipc, utsname, and network, I'd be worried trying to
justify _too_ much infrastructure. The network namespaces are not going
to be solved any time soon. Why not have something like this which is a
quite simple, understandable, minor hack?
> The proc entries are the real interface, and the two pieces
> don't share an implementation unfortunately.
You're saying that the proc interface doesn't use the ->strategy entry?
That isn't what I remember, but I could be completely wrong.
-- Dave
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| Re: [RFC][PATCH 4/5] utsname namespaces: sysctl hack [message #2762 is a reply to message #2761] |
Wed, 19 April 2006 17:37 |
ebiederm
Messages: 1354
Registered: February 2006
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Senior Member |
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Dave Hansen <haveblue@us.ibm.com> writes:
> On Wed, 2006-04-19 at 10:52 -0600, Eric W. Biederman wrote:
>> Dave Hansen <haveblue@us.ibm.com> writes:
>>
>> > Besides ipc and utsnames, can anybody think of some other things in
>> > sysctl that we really need to virtualize?
>>
>> All of the networking entries.
> ...
>> Only in that you attacked the wrong piece of the puzzle.
>> The strategy table entries simply need to die, or be rewritten
>> to use the appropriate proc entries.
>
> If we are limited to ipc, utsname, and network, I'd be worried trying to
> justify _too_ much infrastructure. The network namespaces are not going
> to be solved any time soon. Why not have something like this which is a
> quite simple, understandable, minor hack?
Because it doesn't affect what happens in /proc/sys !
Strategy routines only affect sys_sysctl.
As strategy routines I have no real problems with them.
I haven't looked terribly closely yet.
>> The proc entries are the real interface, and the two pieces
>> don't share an implementation unfortunately.
>
> You're saying that the proc interface doesn't use the ->strategy entry?
> That isn't what I remember, but I could be completely wrong.
Exactly. I have a patch I will be sending out shortly that
make sys_sysctl a compile time option (so we can seriously start killing it)
and it compiles out the strategy routines and /proc/sys still works :)
Eric
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| Re: [RFC][PATCH 4/5] utsname namespaces: sysctl hack [message #2763 is a reply to message #2761] |
Wed, 19 April 2006 17:48 |
ebiederm
Messages: 1354
Registered: February 2006
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Senior Member |
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Dave Hansen <haveblue@us.ibm.com> writes:
> On Wed, 2006-04-19 at 10:52 -0600, Eric W. Biederman wrote:
>> Dave Hansen <haveblue@us.ibm.com> writes:
>>
>> > Besides ipc and utsnames, can anybody think of some other things in
>> > sysctl that we really need to virtualize?
>>
>> All of the networking entries.
> ...
>> Only in that you attacked the wrong piece of the puzzle.
>> The strategy table entries simply need to die, or be rewritten
>> to use the appropriate proc entries.
>
> If we are limited to ipc, utsname, and network, I'd be worried trying to
> justify _too_ much infrastructure. The network namespaces are not going
> to be solved any time soon. Why not have something like this which is a
> quite simple, understandable, minor hack?
As for the network namespaces. It actually isn't that hard, but
it is tedious and big. Once we get ipc and uts it will probably be
the namespace to merge. I have the basic code sitting out on a branch.
Getting the little things like sysctl, sorted out are the primary
problems. At the same time we don't have to solve the problems for
the network namespace now. Just don't expect it way of in the
indefinite future, either.
Eric
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| Re: [RFC][PATCH 4/5] utsname namespaces: sysctl hack [message #2766 is a reply to message #2765] |
Wed, 19 April 2006 20:24 |
serue
Messages: 750
Registered: February 2006
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Senior Member |
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Quoting Eric W. Biederman (ebiederm@xmission.com):
> "Serge E. Hallyn" <serue@us.ibm.com> writes:
>
> > Quoting Eric W. Biederman (ebiederm@xmission.com):
> >> Kirill Korotaev <dev@sw.ru> writes:
> >>
> >> > Serge,
> >> >
> >> > can we do nothing with sysctls at this moment, instead of commiting hacks?
> >>
> >> Except that we modify a static table changing the uts behaviour in
> >> proc_doutsstring isn't all that bad.
> >>
> >> I'm just about to start on something more comprehensive, in
> >> the sysctl case.
> >
> > So assuming that I take out the switch(), leaving that for a better
> > solution by Eric (or Dave, or whoever),
> >
> > Is it time to ask for the utsname namespace patch to be tried out
> > in -mm?
>
> Can we please suggest a syscall interface?
We can, but I was hoping that would be a separate patch, separate
discussion.
Are you asking for a new syscall, specifically to unshare utsname()? Or
for discussion over whether we want to do
one syscall per namespace
extend CLONE_NEWns flags
use unshare
use namespacefs
-serge
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| Re: [RFC][PATCH 4/5] utsname namespaces: sysctl hack [message #2903 is a reply to message #2768] |
Tue, 25 April 2006 22:00 |
serue
Messages: 750
Registered: February 2006
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Senior Member |
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Quoting Sam Vilain (sam@vilain.net):
> Eric W. Biederman wrote:
>
> >>Is it time to ask for the utsname namespace patch to be tried out
> >>in -mm?
> >>
> >>
> >
> >Can we please suggest a syscall interface?
Eric,
Did you have any ideas for how you'd want to interface to look? Are
you fine with the vserver approach?
> What was wrong with the method of the one I posted / extracted from the
> Linux-VServer project? I mean, apart from the baggage which I intend to
> remove for the next posting.
Sam,
Are you working on a next posting?
-serge
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