android_kernel_xiaomi_sm7250/net/sunrpc
NeilBrown 1f1e030bf7 [PATCH] knfsd: fix hash function for IP addresses on 64bit little-endian machines.
The hash.h hash_long function, when used on a 64 bit machine, ignores many
of the middle-order bits.  (The prime chosen it too bit-sparse).

IP addresses for clients of an NFS server are very likely to differ only in
the low-order bits.  As addresses are stored in network-byte-order, these
bits become middle-order bits in a little-endian 64bit 'long', and so do
not contribute to the hash.  Thus you can have the situation where all
clients appear on one hash chain.

So, until hash_long is fixed (or maybe forever), us a hash function that
works well on IP addresses - xor the bytes together.

Thanks to "Iozone" <capps@iozone.org> for identifying this problem.

Cc: "Iozone" <capps@iozone.org>

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-06 08:33:21 -08:00
..
auth_gss SUNRPC: Fix "EPIPE" error on mount of rpcsec_gss-protected partitions 2005-12-19 23:12:21 -05:00
auth_null.c
auth_unix.c
auth.c
cache.c
clnt.c
Makefile
pmap_clnt.c
rpc_pipe.c SUNRPC: Fix "EPIPE" error on mount of rpcsec_gss-protected partitions 2005-12-19 23:12:21 -05:00
sched.c
socklib.c
stats.c
sunrpc_syms.c
svc.c
svcauth_unix.c [PATCH] knfsd: fix hash function for IP addresses on 64bit little-endian machines. 2006-01-06 08:33:21 -08:00
svcauth.c
svcsock.c [NET]: move struct proto_ops to const 2006-01-03 13:11:15 -08:00
sysctl.c
timer.c
xdr.c
xprt.c
xprtsock.c RPC: Do not block on skb allocation 2005-12-19 23:11:54 -05:00