*after* writing, the directory tree gets alphabetically sorted for
path table. this causes data to not be in the same order as it was
written causing seeks when taring up the filesystem.
so instead write the files in alphabetical order as well to better
match the directory sorting.
9660srv: keep data and metadata separate in the cache with a tag
data on the disk is layed out sequentially and directory information
is at the end of the disk. we want to keep data and metadata separated
so that reading large sequential files will not evict the directory
information from the cache causing long seeks.
for that, we tag the clusters (an 8th for metadata, and the rest
for data) and getbuf() will only evict clusters of the same tag.
cpp: search source file directory first for quoted #include (thanks Ori_B)
foo.c includes bar/bar.h, which includes "baz.h"; it wants bar/baz.h
meanwhile, it also includes meh/quux.h, which includes "baz.h"; it wants meh/baz.h
kernel: reject bogus two byte "#!" shell scripts in sysexec()
- reject files smaller or equal to two bytes, they are bogus
- fix out of bounds access in shargs() when n <= 2
- only copy the bytes read into line buffer
- use nil for pointers instead of 0
kernel: various cleanups of imagereclaim(), pagereclaim(), freepages(), putimage()
imagereclaim(), pagereclaim():
- move imagereclaim() and pagereclaim() declarations to portfns.h
- consistently use ulong type for page counts
- name number of pages to free "pages" instead of "min"
- check for pages == 0 on entry
cinap_lenrek [Sun, 21 Jun 2015 17:35:08 +0000 (19:35 +0200)]
wifi: berlin prime bunny hopping
- reduce delay for channel hop to 200ms
- use 1000ms timeout for auth response (dont hop channels while we wait)
- bunny hop sequence is mathematically prooven
cinap_lenrek [Thu, 18 Jun 2015 10:15:33 +0000 (12:15 +0200)]
kernel: ignore memory pages with singular kernel addresses
addresses va's of 0 and -BY2PG cause trouble with some memmove()/memset()
implementations and possibly other code because of the nil pointer
and end pointers wrapping to zero.
cinap_lenrek [Thu, 18 Jun 2015 02:35:46 +0000 (04:35 +0200)]
zynq: fix barriers
unlock()/iunlock():
we need to place the coherence() *before* "l->key = 0", so that any
stores that where done while holding the lock become observable
*before* other processors see the lock released.
cas()/tas():
place memory barrier before successfull return to prevent reordering.
cinap_lenrek [Thu, 18 Jun 2015 01:13:50 +0000 (03:13 +0200)]
kernel: do not inherit Proc.dot (current working directory) in kproc()
making sure to close the dot in every kproc appears repetitive,
so instead stop inheriting the dot in kproc() as this is usually
never what you wanted in the first place.
cinap_lenrek [Mon, 15 Jun 2015 14:05:00 +0000 (16:05 +0200)]
kernel: implement separate wait queues for page allocation
give kernel processes and local disk file servers (procs
having noswap flag set) a clear advantage for page allocation
under starved condition by giving them ther own wait queue so
they get readied as soon as pages become available.
cinap_lenrek [Mon, 15 Jun 2015 06:28:10 +0000 (08:28 +0200)]
hjfs: defer parent directory permission check for wstat
check parent directory permission *after* we determined
that the new name does not exist in the parent, so that
when the new name is the same as old name then no write
permission is required in the parent directory.
cinap_lenrek [Sun, 14 Jun 2015 19:31:44 +0000 (21:31 +0200)]
ndb/dns: cleanup forwarding code (redistrib())
instead of copying the whole packet, just save the
udp header and restore it aftwards. dont call redistrib()
when there are no forwards (this should be almost always
the case).
cinap_lenrek [Fri, 12 Jun 2015 15:28:09 +0000 (17:28 +0200)]
games/doom: fix desyncing demo (thanks qwx)
the code used P_Random()-P_Random() in some places which has
undefined evaluation order resulting in the wrong pseudo random
numbers being returned causing demo playback to desync.
this change adds P_Random2() function which returns the right
delta-random number and uses it in place of P_Random()-P_Random()
expression.
cinap_lenrek [Tue, 9 Jun 2015 08:04:04 +0000 (10:04 +0200)]
ip: fix wrong radix for iphash() (thanks yoann padioleau)
yoann padioleaus report on 9fans:
> I think I’ve found a bug in the network stack.
> in 9/ip/ip.h there is
> struct Ipht
> {
> Lock;
> Iphash *tab[Nipht];
> };
>
> where Night is 521,
>
> but then in 9/ip/ipaux.c there is
>
> ulong
> iphash(uchar *sa, ushort sp, uchar *da, ushort dp)
> {
> return ((sa[IPaddrlen-1]<<24) ^ (sp << 16) ^ (da[IPaddrlen-1]<<8) ^ dp ) % Nhash;
> }
>
> where Nhash is just 64,