[9fans] Miller's 9pi image (rpi4) problems

[9fans] Miller's 9pi image (rpi4) problems

[adr via 9fans]

First of all, hello to everyone.

I've been using 9front attracted by the aarch64 support, not so
much by the 64 bit words but by the registers at hand.

I got problems with cwfs: the name length limit hardcoded at
compile time, impossibility of disk usage statistics for the "other"
partition (in a file system which is going to crash when full...)
and some file corruption when halting in a usb disk still reading
from the buffer. I don't feel comfortable using an experimental fs
like hjfs.

I used Plan9 almost a decade ago. I remember using fossil+venti
and been quite happy (after some bug was discovered). I'm using
only arm computers now and is great to see the rpi4 supported, and
Richard Miller's image is almost a lab's distribution. So I renounced
to those precious free registers and gave it a try.

The biggest problem to me is the usb code.

First I'm using a kvm switch so there are a lot of attachments-detachments.
At a certain point it will end with "No slots available" and the
usb will became unusable. For me is a labyrinth, but I'm pretty sure
someone with more experience with the system could fix it.

There is something wrong with the code responsible of managing and
monitoring the power of the ports. This is going to be more
complicated. It is impossible to use any usb disk. I managed to
make one appear connecting it to one of the usb2 ports and powering
the usb disk externally before turning on the pi (the system crashed
several times when I powered the disk with the os running), but it
was useless:

usb/disk: startdevs: opening #0 /dev/usb/ep5.0
usb/disk: devmain: disk: endpoints not found
usb/disk: no unhandled devices found

The other issue important to me is with webfs:
webfs: tlsClient: fd out of range or not open

So no abaco for me, almost every page I try to load ends up with
this error. I installed a recent go and compiled opossum, but
at this point is unusable, at least for me.

I've had horrible usb related experiences with openbsd and netbsd
since the beginning of time, so it really surprised me the stability
of the 9front usb system.

Sorry I can only report this at the moment.

Regards,
adr.

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Re: [9fans] Miller's 9pi image (rpi4) problems

[Richard Miller]

To be pedantic, the troubles you describe are not strictly "9pi image problems",
you will likely find that 4e Plan 9 on any architecture will behave the same.

The usb subsystem is known to be pretty rudimentary, and indeed with respect
to power management /sys/src/cmd/usb/usbd/usbd.c:/^portattach is headed by
this comment:
 * BUG: does not consider max. power avail.

Having said that, "It is impossible to use any usb disk" is possibly an
overstatement. Some disks will work, some won't. That's not necessarily
a power management problem. Steve Simon might want to comment here on
his experience with usb3 sata adapters. Some modern disks use the "UASP"
protocol in preference to the traditional bulk-only mass storage protocol
supported by the Plan 9 usbdisk driver. Even if the disk also supports
bulk-only, the existing driver won't try to pick an alternate configuration
to force the disk to fall back to that protocol. Below is a patch (tested on
only one drive, as far as I know) which will make it do that.

As for your reported problem with webfs:
> webfs: tlsClient: fd out of range or not open
what exactly did you do which raised this error? I don't usually use webfs, but
I've just tried it and made a successful tls connection to github with abaco.

--- /n/sources/plan9/sys/src/cmd/usb/lib/parse.c        Fri Jan  8 18:00:43 2010
+++ ./parse.c   Tue Mar 23 16:19:20 2021
@@ -66,6 +66,11 @@
        }
        if(c->iface[ifid] == nil)
                c->iface[ifid] = emallocz(sizeof(Iface), 1);
+       else{
+               /* hack to avoid unsupported uasp disk interface */
+               if(dip->bInterfaceClass == Clstorage && dip->bInterfaceProtocol != 0x50)
+                       return 0;
+       }
        ip = c->iface[ifid];
        class = dip->bInterfaceClass;
        subclass = dip->bInterfaceSubClass;
@@ -164,6 +169,7 @@
        Ep      *ep;
        Altc    *altc;
        char    *hd;
+       int     ok;
 
        assert(d != nil && c != nil);
        tot = 0;
@@ -174,6 +180,7 @@
                if(d->ddesc[nd] == nil)
                        break;
 
+       ok = 1;
        while(n > 2 && b[0] != 0 && b[0] <= n){
                len = b[0];
                if(usbdebug>1){
@@ -189,7 +196,7 @@
                        ddprint(2, "%s\tparsedesc: %r", argv0);
                        break;
                case Diface:
-                       if(parseiface(d, c, b, n, &ip, &altc) < 0){
+                       if((ok = parseiface(d, c, b, n, &ip, &altc)) < 0){
                                ddprint(2, "%s\tparsedesc: %r\n", argv0);
                                return -1;
                        }
@@ -199,6 +206,8 @@
                                werrstr("unexpected endpoint descriptor");
                                break;
                        }
+                       if(!ok)
+                               break;
                        if(parseendpt(d, c, ip, altc, b, n, &ep) < 0){
                                ddprint(2, "%s\tparsedesc: %r\n", argv0);
                                return -1;


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Re: [9fans] Miller's 9pi image (rpi4) problems

[Richard Miller]

> Below is a patch ...

Something in the 9fans pathway has expanded the tabs in my patch into
8 spaces. Irritating. If you want to apply the patch, it will probably
be necessary to turn them back into tabs.


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Re: [9fans] Miller's 9pi image (rpi4) problems

[adr via 9fans]

> The usb subsystem is known to be pretty rudimentary, and indeed with respect
> to power management /sys/src/cmd/usb/usbd/usbd.c:/^portattach is headed by
> this comment:
>  * BUG: does not consider max. power avail.
> 
> Having said that, "It is impossible to use any usb disk" is possibly an
> overstatement.

Of course! I was talking about _me_ and  _my_disks_.

> Some disks will work, some won't. That's not necessarily
> a power management problem.

They are only recognized when powering them externally, and with
risk of freezing the system. Note also that usb3 devices are not
recognized on the usb3 ports (again...  I mean my usb3 devices).

> Some modern disks use the "UASP"
> protocol in preference to the traditional bulk-only mass storage protocol
> supported by the Plan 9 usbdisk driver. Even if the disk also supports
> bulk-only, the existing driver won't try to pick an alternate configuration
> to force the disk to fall back to that protocol. Below is a patch (tested on
> only one drive, as far as I know) which will make it do that.

Thanks, I'll give it a try.

> As for your reported problem with webfs:
> > webfs: tlsClient: fd out of range or not open
> what exactly did you do which raised this error? I don't usually use webfs, but
> I've just tried it and made a successful tls connection to github with abaco.

I can connect to github too, and some other places. But if you surf the web
you'll end up with this error. Just a few If you want to do a test:

https://developer.arm.com
https://wikipedia.org
https://marc.info
https://www.perseus.tufts.edu
http://mars.jpl.nasa.gov

Regards,
adr.

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Re: [9fans] Miller's 9pi image (rpi4) problems

[Richard Miller]

> I can connect to github too, and some other places. But if you surf the web
> you'll end up with this error. Just a few If you want to do a test:
> 
> https://developer.arm.com
> https://wikipedia.org
> https://marc.info
> https://www.perseus.tufts.edu
> http://mars.jpl.nasa.gov

Thanks, I did a test:

term% hget https://wikipedia.org
tlsClient: could not negotiate acceptable security parameters

What most of these sites have in common is that they allow only ECDHE key exchange
for tls1.2, which I think is not currently implemented in either 4e or 9legacy.

Any volunteers?

The last example is a weird one:

term% hget https://mars.jpl.nasa.gov
tlsClient: devtls expected ver=303, saw (len=2) type=15 ver=0 '\x15'

I'll let somebody else try to diagnose that!


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Re: [9fans] Miller's 9pi image (rpi4) problems

[adr via 9fans]

> > Some modern disks use the "UASP"
> > protocol in preference to the traditional bulk-only mass storage protocol
> > supported by the Plan 9 usbdisk driver. Even if the disk also supports
> > bulk-only, the existing driver won't try to pick an alternate configuration
> > to force the disk to fall back to that protocol. Below is a patch (tested on
> > only one drive, as far as I know) which will make it do that.
> 
> Thanks, I'll give it a try.

No luck!, although the end points appear now after manually executing
usb/disk.

kprint when attaching the disk:
usb/disk... usb/hub... /boot/usbd: disk: disk: endpoints not found
usb/disk... 

; cat /dev/usb/ctl
ep1.0 enabled control rw speed high maxpkt 64 pollival 0 samplesz 0 hz 0 hub 0 port 0 rootport 0 addr 0 busy
roothub csp 0x000009 ports 1 xhci
ep2.0 enabled control rw speed super maxpkt 512 pollival 0 samplesz 0 hz 0 hub 0 port 0 rootport 0 addr 0 busy
roothub csp 0x000009 ports 4 xhci
ep3.0 enabled control rw speed high maxpkt 64 pollival 0 samplesz 0 hz 0 hub 0 port 1 rootport 1 addr 1 busy
hub csp 0x010009 ports 4 none <nil> xhci
ep8.0 enabled control rw speed high maxpkt 64 pollival 0 samplesz 0 hz 0 hub 1 port 3 rootport 1 addr 6 busy
hub csp 0x020009 ports 4 'VIA Labs, Inc.         ' 'USB2.0 Hub             ' xhci
ep5.0 enabled control rw speed high maxpkt 64 pollival 0 samplesz 0 hz 0 hub 1 port 4 rootport 1 addr 3 busy
hub csp 0x010009 ports 4 'USB Device  ' 'USB 2.0 Hub            ' xhci
ep6.0 enabled control rw speed low maxpkt 8 pollival 0 samplesz 0 hz 0 hub 3 port 1 rootport 1 addr 4 busy
hid csp 0x020103 vid 0x1c4f did 0x0078 SIGMACHIP 'SG 2.4G Wireless Mouse' xhci
ep6.2 enabled interrupt r speed low maxpkt 8 pollival 10 samplesz 0 hz 0 hub 3 port 1 rootport 1 addr 4 busy
ep7.0 enabled control rw speed low maxpkt 8 pollival 0 samplesz 0 hz 0 hub 3 port 2 rootport 1 addr 5 busy
hid csp 0x010103 csp 0x000003 vid 0x0c45 did 0x9510 S U xhci
ep7.1 enabled interrupt r speed low maxpkt 8 pollival 10 samplesz 0 hz 0 hub 3 port 2 rootport 1 addr 5 busy
ep9.0 enabled control rw speed high maxpkt 64 pollival 0 samplesz 0 hz 0 hub 6 port 3 rootport 1 addr 8 idle
storage csp 0x500608 csp 0x620608 vid 0x0bc2 did 0xaa14 Seagate Basic xhci

; usb/disk -dD /dev/usb/ep9.0
usb/disk: fsioproc pid 332
<- Tversion tag 65535 msize 8216 version '9P2000'
-> Rversion tag 65535 msize 8216 version '9P2000'
<- Tauth tag 12 afid 394 uname adr aname 
-> Rerror tag 12 ename permission denied
<- Tattach tag 12 fid 394 afid -1 uname adr aname 
-> Rattach tag 12 qid (0000000000000000 0 d)
usb/disk: startdevs: opening #0 /dev/usb/ep9.0
usb/disk: opendev 0x4e5d8 /dev/usb/ep9.0
usb/disk: /dev/usb/ep9.0 csp storage.6.80 vid 0xbc2 did 0xaa14 refs 1
        Seagate Basic 00000000NABC5SSF
        conf: cval 1 attrib 80 500 mA
                iface csp storage.6.80
                  alt 0 attr 2 ival 0
disk: ep ids: in 1 out 2
usb/disk: opendev 0x50d98 /dev/usb/ep9.1
usb/disk: /dev/usb/ep9.1: maxpkt 512
usb/disk: /dev/usb/ep9.1: ntds 1
usb/disk: opendev 0x50e58 /dev/usb/ep9.2
usb/disk: /dev/usb/ep9.2: maxpkt 512
usb/disk: /dev/usb/ep9.2: ntds 1
disk: ep in /dev/usb/ep9.1 out /dev/usb/ep9.2
disk: /dev/usb/ep9.0: maxlun 0
disk: cmd: tag 0x1:  12 00 00 00 ff 00 datalen: 255
disk: data: 76 bytes
disk: status: 00 residue: 179
disk: cmd: tag 0x2:  1b 00 00 00 01 00 datalen: 0
disk: status: 00 residue: 0
disk: cmd: tag 0x3:  25 00 00 00 00 00 00 00 00 00 datalen: 8
disk: data: 8 bytes
disk: status: 00 residue: 0
disk: cmd: tag 0x4:  9e 10 00 00 00 00 00 00 00 00 00 00 00 20 00 00 datalen: 32
disk: data: 32 bytes
disk: status: 00 residue: 0
disk: logical block size 512, # blocks 7814037167
usb/disk: fsadd sdU9.0

; ls /dev/sd*
/dev/sdM0/ctl
/dev/sdM0/data
/dev/sdM0/dos
/dev/sdM0/fossil
/dev/sdM0/nvram
/dev/sdM0/plan9
/dev/sdM0/raw
/dev/sdctl

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Re: [9fans] Miller's 9pi image (rpi4) problems

[Richard Miller]

> No luck!, although the end points appear now after manually executing
> usb/disk.
> ...
> disk: logical block size 512, # blocks 7814037167
> usb/disk: fsadd sdU9.0

Once you've reached that point, it looks like the driver is handling the disk ok.
But despite the message you won't see it in /dev/sdU9.0 when starting usb/disk
manually, because the usb device namespace appears someplace else ... I can't
recall where just now. (9front does this in a different and better way.)

What I would do is update /$objtype/bin/usb/usbd from the patched source and
rebuild the kernel with that.


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Re: [9fans] Miller's 9pi image (rpi4) problems

[adr via 9fans]

On Fri, Jun 11, 2021 at 05:26:46PM +0100, Richard Miller wrote:
> > No luck!, although the end points appear now after manually executing
> > usb/disk.
> > ...
> > disk: logical block size 512, # blocks 7814037167
> > usb/disk: fsadd sdU9.0
> 
> Once you've reached that point, it looks like the driver is handling the disk ok.
> But despite the message you won't see it in /dev/sdU9.0 when starting usb/disk
> manually, because the usb device namespace appears someplace else ... I can't
> recall where just now. (9front does this in a different and better way.)
> 
> What I would do is update /$objtype/bin/usb/usbd from the patched source and
> rebuild the kernel with that.

I did it, now the sd disk appears in /dev, but I can't set up the
plan9 partitions:

; diskparts /dev/sdU0.0
; ls /dev/sdU0.0
/dev/sdU0.0/ctl
/dev/sdU0.0/data
/dev/sdU0.0/raw

; fdisk /dev/sdU0.0/data
cylinder = 8225280 bytes
   p1                       0 50            (50 cylinders, 392.21 MB) FAT32
   p2                      50 219051        (219001 cylinders, 1.63 TB) PLAN9
   empty               219051 486401        (267350 cylinders, 2.00 TB) 

; fdisk -p /dev/sdU0.0/data
part dos 63 803250
part plan9 803250 3519064769

; fdisk -p /dev/sdU0.0/data >/dev/sdU0.0/ctl
; ls /dev/sdU0.0
/dev/sdU0.0/ctl
/dev/sdU0.0/data
/dev/sdU0.0/raw

Thanks anyway.
adr.

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Re: [9fans] Miller's 9pi image (rpi4) problems

[Richard Miller]

I said:
> But despite the message you won't see it in /dev/sdU9.0 when starting usb/disk

I remember now: just do 'usb/disk -m /dev' to get the sdUX.Y mounted where you want.

adr said:
>now the sd disk appears in /dev, but I can't set up the
>plan9 partitions:
> ...
>Thanks anyway.

If you're used to 9front, you'll be having all sorts of little surprises.
It may be easy to jump to the conclusion "9front can do X, plan 9 can't",
but sometimes the situation is "9front does it this way, plan 9 does it that way".

This usb/disk doesn't have its own partition manager, because there's an
independent one which does the job: see partfs(8) for how to use it.


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Re: [9fans] Miller's 9pi image (rpi4) problems

[a]

FWIW, here's an excerpt from my /cfg/sysname/termrc which i use to
start an extra fossil. The disk is a large (10TB from memory) WD Elements
connected to one of the USB2 ports. I don't yet start the venti
automatically because i keep remaking it to try different
configurations, but it runs fine.


# If the big WD Elements is attached, make it available.
# Not sure this is the best thing to grep for.
if (grep -s 25A3 /dev/sdU0.0/ctl) {
        disk/partfs /dev/sdU0.0/data
        disk/fdisk -p /dev/sdXX/data > /dev/sdXX/ctl
        disk/prep -p /dev/sdXX/plan9 > /dev/sdXX/ctl
        fossil/fossil -f /dev/sdXX/fossil
        # pending: venti/venti -c /dev/sdXX/arenas
} &

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Re: [9fans] Miller's 9pi image (rpi4) problems

[hiro]

> It may be easy to jump to the conclusion "9front can do X, plan 9 can't",
> but sometimes the situation is "9front does it this way, plan 9 does it that
> way".

yep, and sometimes 9front does it some way, while 4e doesn't do it in any way.
and sometimes 4e does it some way and 9front doesn't do it at all due
to unmaintainable unstable code (that's why we went back to cwfs).

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Re: [9fans] Miller's 9pi image (rpi4) problems

[adr via 9fans]

Now all is making sense. The tricky part will be configuring it at
boot time to make it the root file system...

Thanks a lot to both of you for the help, specially to you Richard.

Regards,
adr.

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[9fans] Re: Miller's 9pi image (rpi4) problems

[adr via 9fans]

> The biggest problem to me is the usb code.
> 
> First I'm using a kvm switch so there are a lot of attachments-detachments.
> At a certain point it will end with "No slots available" and the
> usb will became unusable. For me is a labyrinth, but I'm pretty sure
> someone with more experience with the system could fix it.

I found how 9front fixed this:

--- /n/sources/contrib/miller/9/bcm/devusb.c    Wed Sep 18 16:02:39 2019
+++ devusb.c    Sun Jun 13 16:21:28 2021
@@ -389,6 +389,10 @@
                if(ep->ep0 != ep){
                        putep(ep->ep0);
                        ep->ep0 = nil;
+               } else if(d != nil){
+                       if(d->free != nil)
+                               (*d->free)(d->aux);
+                       free(d);
                }
                free(ep->info);
                free(ep->name);

I can't understand the code yet, but my impression is that the
original intention was to not free the slot by default when a device
is detached, not allocate a new one if the same device is reconnected
but reused the old one, and free the unused slots when some time
has passed or if there is no one available.  But what the code is
doing is allocating a new slot every time a new device is attached
and what this hack does is free the corresponded slot every time
a device is detached.

Regards,
adr.

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Re: [9fans] Miller's 9pi image (rpi4) problems

[Steve Simon]

I must appologise, though I sent a reply at the time, an out of date x509
certificate meant the email never reached my ISP.

What I tried to say was... 

> I wonder if the abaco problem you are seeing is the global move to
> stronger TLS algorithms. I have backported libcrypt from 9front which
> was fairly straightforward - a it needed wider (but justified IMHO) changes
> than i hoped but it was an afternoon's work.
> 
> I use webfs from 9front too to - cinap pretty much rewrote it and his code
> is much cleaner (again IMHO). It needs only a couple of tiny tweeks to work.
> 
> I found usb2 disk adapters worked fine, and usb3 adapters work in usb2 sockets 
> in the pi4, the combination I failed to get to work was usb3 adapters in usb3
> sockets (the most interesting one of course).
> 
> The usbxhci.c in the kernal is cinap's from 9front with a few small changes
> for different kernal interfaces, I checked it was in sync a few months ago
> and expect it still is.
> 
> I am afriad my progress stalled there.

-Steve

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Re: [9fans] Miller's 9pi image (rpi4) problems

[adr via 9fans]

On Thu, Jun 17, 2021 at 04:05:15PM +0100, Steve Simon wrote:
> I must appologise, though I sent a reply at the time, an out of date x509
> certificate meant the email never reached my ISP.

Hi Steve, thanks anyway.

> What I tried to say was... 
> 
> > I wonder if the abaco problem you are seeing is the global move to
> > stronger TLS algorithms. I have backported libcrypt from 9front which
> > was fairly straightforward - a it needed wider (but justified IMHO) changes
> > than i hoped but it was an afternoon's work.

Excuse my ignorance, but you mean libsec?

I've already done that, I'm in the process of converting my system
to 9legacy and and I'll share a diff then.

I started importing ciphers and adding functions when needed, but
soon I realized that it was silly because the code was written in
a really conservative way, I copied the entire libsec/port dir and
made only the needed changes when needed, it was easiest and fastest.

The only major changes to the api were in okThumbprint() and
initThumbprints() with an extra parameter for hash length and tag
respectively.

As I said I'll share it when it's clean, I think everybody would
benefit sharing the same code in such an evolving field, I'll put
a big patch somewhere and let the people decide.

> > I use webfs from 9front too to - cinap pretty much rewrote it and his code
> > is much cleaner (again IMHO). It needs only a couple of tiny tweeks to work.

I think I didn't have to change webfs, I can connect to almost
every site, but I still have some trouble with some of them, I want
to debug it but now I'm using some free time trying to decide my
fossil and venti partitions and settings... piece of cake...

Regards,
adr.

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Re: [9fans] Miller's 9pi image (rpi4) problems

[adr via 9fans]

> Some modern disks use the "UASP" protocol in preference to the
> traditional bulk-only mass storage protocol supported by the Plan
> 9 usbdisk driver. Even if the disk also supports bulk-only, the
> existing driver won't try to pick an alternate configuration to
> force the disk to fall back to that protocol. Below is a patch
> (tested on only one drive, as far as I know) which will make it do
> that.

Richards that patch makes other devices to not work, have you tested
it after compiling all usb and kernel? The test for storage and
bulk is done in usb/disk.c. Adding Protouas to the test solve the
problem. This is done also in 9front.

Regards,
adr.

diff -urP /n/img/sys/src/cmd/usb/disk/disk.c /sys/src/cmd/usb/disk/disk.c
--- /n/img/sys/src/cmd/usb/disk/disk.c  Tue Dec 13 23:35:47 2011
+++ /sys/src/cmd/usb/disk/disk.c        Sat Jun 19 10:45:37 2021
@@ -663,7 +663,7 @@
                        continue;
                csp = ep->iface->csp;
                sc = Subclass(csp);
-               if(!(Class(csp) == Clstorage && (Proto(csp) == Protobulk)))
+               if(!(Class(csp) == Clstorage && (Proto(csp) == Protobulk || Proto(csp) == Protouas)))
                        continue;
                if(sc != Subatapi && sc != Sub8070 && sc != Subscsi)
                        fprint(2, "disk: subclass %#ulx not supported. trying anyway\n", sc);
diff -urP /n/img/sys/src/cmd/usb/disk/ums.h /sys/src/cmd/usb/disk/ums.h
--- /n/img/sys/src/cmd/usb/disk/ums.h   Wed Feb 13 21:22:23 2013
+++ /sys/src/cmd/usb/disk/ums.h Sat Jun 19 10:44:13 2021
@@ -13,6 +13,7 @@
        Protocbi =      0,      /* control/bulk/interrupt; mainly floppies */
        Protocb =       1,      /*   "  with no interrupt; mainly floppies */
        Protobulk =     0x50,   /* bulk only */
+       Protouas =      0x62,   /* USB-attached SCSI */
 
        Subrbc =        1,      /* reduced blk cmds */
        Subatapi =      2,      /* cd/dvd using sff-8020i or mmc-2 cmd blks */


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Re: [9fans] Miller's 9pi image (rpi4) problems

[Richard Miller]

> Some modern disks use the "UASP" protocol in preference to the
>> traditional bulk-only mass storage protocol supported by the Plan
>> 9 usbdisk driver...
>
> Richards that patch makes other devices to not work, have you tested
> it after compiling all usb and kernel?

No, it was an experiment on one particular drive, tested with
usb/disk started by hand. I didn't think the patch was ready to be
submitted anywhere, and you've confirmed that was right.

Thanks for the extra tweak.


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