add checktag and nil checks in cfsdump() making sure to notice
when the roroot directory structures is corrupted.
cwrecur() used tag == Tsuper to indicate that this is the first
level recursive invocation. this is confusing as we really expect
Tdir tag in that case for the root directory. instead, we now
pass the correct tag (Tdir) and use cw->depth > 1 to see if we
are past the root.
the block tag was only checked when the block was not in
the memory cache. check the tag always!
using a shared reply queue and a pool of worker procs does
result in replies to be send out of order under some conditions.
the symptoms are mnt errors when interrupting requests (Rflush
arriving before the original requests response).
this change gives each connection its own reply queue and its
own srvo process. so now a connection consists of one reply
queue, a srvi process reading the connections file descriptor
and a srvo process reading the reply queue and writng replies
to the connections file descriptor.
the srvi processes live as long as the connection is established.
the srvo prcoesses live forever and are attached to the chan
(which gets reused).
to avoid excessive process creation, we limit the number of
connections to 30. srvchan() returns nil when all 30 network
channels are in use.
allow attach as none. (this was supposed to work but it
doesnt for 9p2000 because we have to check for
afid being NOFID instead of checking the uname string).
and add "nonone" flag to disable this.
before, cwfs would print everything to /dev/cons. this change
will redirect the output of commands to the /srv/cwfs.cmd pipe
so one can use:
con -C /srv/cwfs.cmd
and not have the fish for the output in /dev/kmesg.
use standard error (/dev/cons) for unsolicited messages as
there is not always a reader on the command file.
