Hi, all.

I'm writing a lib to build 9P200 file servers for x86-class embedded 
systems under RTEMS.
Testing the same server under FreeBSD and RTEMS with one Plan9 or 
FreeBSD p9p client I noted some things that I don't understand.

Config: Server = adri (FreeBSD 6.2+fuse+p9p) or leo (RTEMS 4.6.5), 
same    	behaviour
	Client = dria (Plan9 or FreeBSD 6.0+fuse+p9p)

1) Different use of Fids in Plan9 and p9p

Plan9% srv tcp!adri!12000 adri
Plan9% mount /srv/adri /n/adri
Plan9% lc /n/adri (several times)
Plan9% unmount /n/adri

FrBSD% srv 'tcp!adri!12000' adri
FrBSD% 9 mount NS/adri /n/adri
FrBSD% lc /n/adri (several times)
FrBSD% 9 unmount /n/adri

The log of the two sessions above are in the the attached files.
I see that the FreeBDS "lc" command allocates a lot of Fids while
Plan9 reuse them issuing Tclunk messages as soon as possible.
My server use a static Fid table (FidTab=<used>/<total> in the logs).
The number of allocated Fids grows (until the unmount) so a larger table 
(or malloc-ed Fids) is not a solution.

2) Different use of Fids in Plan9 and p9p
The Unix "ls" reuse the Fids as the "lc" does.

3) Tread

 >[ 23] Tread:    tag=4, fid=201, offset=0, count=8192
<[292] Rread:    tag=4, count=281
       E\0\0\0\0\0\0\0\0\0\0\0\0\32\1\0\0\0\0\0\0\37777777666\1\0\0\0
       \0\0\0\0\0\0\0\20\0\0\0\0\0\0\0\7\0file_0a\7\0adriano\7\0adr
 >[ 23] Tread:    tag=4, fid=201, offset=281, count=8192
<[ 11] Rread:    tag=4, count=0

Why the client always sends a second Tread request ?
If the Rread returned 281/8192 bytes and the msize is > 8192 it should 
be clear that there is no other data to read.

Thanks in advance
A. Verardo