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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-24 21:01:50 +0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-24 21:01:50 +0400 |
commit | 3c4cfadef6a1665d9cd02a543782d03d3e6740c6 (patch) | |
tree | 3df72faaacd494d5ac8c9668df4f529b1b5e4457 /net/batman-adv/bitarray.c | |
parent | e017507f37d5cb8b541df165a824958bc333bec3 (diff) | |
parent | 320f5ea0cedc08ef65d67e056bcb9d181386ef2c (diff) | |
download | linux-3c4cfadef6a1665d9cd02a543782d03d3e6740c6.tar.xz |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking changes from David S Miller:
1) Remove the ipv4 routing cache. Now lookups go directly into the FIB
trie and use prebuilt routes cached there.
No more garbage collection, no more rDOS attacks on the routing
cache. Instead we now get predictable and consistent performance,
no matter what the pattern of traffic we service.
This has been almost 2 years in the making. Special thanks to
Julian Anastasov, Eric Dumazet, Steffen Klassert, and others who
have helped along the way.
I'm sure that with a change of this magnitude there will be some
kind of fallout, but such things ought the be simple to fix at this
point. Luckily I'm not European so I'll be around all of August to
fix things :-)
The major stages of this work here are each fronted by a forced
merge commit whose commit message contains a top-level description
of the motivations and implementation issues.
2) Pre-demux of established ipv4 TCP sockets, saves a route demux on
input.
3) TCP SYN/ACK performance tweaks from Eric Dumazet.
4) Add namespace support for netfilter L4 conntrack helpers, from Gao
Feng.
5) Add config mechanism for Energy Efficient Ethernet to ethtool, from
Yuval Mintz.
6) Remove quadratic behavior from /proc/net/unix, from Eric Dumazet.
7) Support for connection tracker helpers in userspace, from Pablo
Neira Ayuso.
8) Allow userspace driven TX load balancing functions in TEAM driver,
from Jiri Pirko.
9) Kill off NLMSG_PUT and RTA_PUT macros, more gross stuff with
embedded gotos.
10) TCP Small Queues, essentially minimize the amount of TCP data queued
up in the packet scheduler layer. Whereas the existing BQL (Byte
Queue Limits) limits the pkt_sched --> netdevice queuing levels,
this controls the TCP --> pkt_sched queueing levels.
From Eric Dumazet.
11) Reduce the number of get_page/put_page ops done on SKB fragments,
from Alexander Duyck.
12) Implement protection against blind resets in TCP (RFC 5961), from
Eric Dumazet.
13) Support the client side of TCP Fast Open, basically the ability to
send data in the SYN exchange, from Yuchung Cheng.
Basically, the sender queues up data with a sendmsg() call using
MSG_FASTOPEN, then they do the connect() which emits the queued up
fastopen data.
14) Avoid all the problems we get into in TCP when timers or PMTU events
hit a locked socket. The TCP Small Queues changes added a
tcp_release_cb() that allows us to queue work up to the
release_sock() caller, and that's what we use here too. From Eric
Dumazet.
15) Zero copy on TX support for TUN driver, from Michael S. Tsirkin.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1870 commits)
genetlink: define lockdep_genl_is_held() when CONFIG_LOCKDEP
r8169: revert "add byte queue limit support".
ipv4: Change rt->rt_iif encoding.
net: Make skb->skb_iif always track skb->dev
ipv4: Prepare for change of rt->rt_iif encoding.
ipv4: Remove all RTCF_DIRECTSRC handliing.
ipv4: Really ignore ICMP address requests/replies.
decnet: Don't set RTCF_DIRECTSRC.
net/ipv4/ip_vti.c: Fix __rcu warnings detected by sparse.
ipv4: Remove redundant assignment
rds: set correct msg_namelen
openvswitch: potential NULL deref in sample()
tcp: dont drop MTU reduction indications
bnx2x: Add new 57840 device IDs
tcp: avoid oops in tcp_metrics and reset tcpm_stamp
niu: Change niu_rbr_fill() to use unlikely() to check niu_rbr_add_page() return value
niu: Fix to check for dma mapping errors.
net: Fix references to out-of-scope variables in put_cmsg_compat()
net: ethernet: davinci_emac: add pm_runtime support
net: ethernet: davinci_emac: Remove unnecessary #include
...
Diffstat (limited to 'net/batman-adv/bitarray.c')
-rw-r--r-- | net/batman-adv/bitarray.c | 65 |
1 files changed, 31 insertions, 34 deletions
diff --git a/net/batman-adv/bitarray.c b/net/batman-adv/bitarray.c index 07ae6e1b8aca..aea174cdbfbd 100644 --- a/net/batman-adv/bitarray.c +++ b/net/batman-adv/bitarray.c @@ -1,5 +1,4 @@ -/* - * Copyright (C) 2006-2012 B.A.T.M.A.N. contributors: +/* Copyright (C) 2006-2012 B.A.T.M.A.N. contributors: * * Simon Wunderlich, Marek Lindner * @@ -16,7 +15,6 @@ * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301, USA - * */ #include "main.h" @@ -25,12 +23,12 @@ #include <linux/bitops.h> /* shift the packet array by n places. */ -static void bat_bitmap_shift_left(unsigned long *seq_bits, int32_t n) +static void batadv_bitmap_shift_left(unsigned long *seq_bits, int32_t n) { - if (n <= 0 || n >= TQ_LOCAL_WINDOW_SIZE) + if (n <= 0 || n >= BATADV_TQ_LOCAL_WINDOW_SIZE) return; - bitmap_shift_left(seq_bits, seq_bits, n, TQ_LOCAL_WINDOW_SIZE); + bitmap_shift_left(seq_bits, seq_bits, n, BATADV_TQ_LOCAL_WINDOW_SIZE); } @@ -40,58 +38,57 @@ static void bat_bitmap_shift_left(unsigned long *seq_bits, int32_t n) * 1 if the window was moved (either new or very old) * 0 if the window was not moved/shifted. */ -int bit_get_packet(void *priv, unsigned long *seq_bits, - int32_t seq_num_diff, int set_mark) +int batadv_bit_get_packet(void *priv, unsigned long *seq_bits, + int32_t seq_num_diff, int set_mark) { - struct bat_priv *bat_priv = priv; + struct batadv_priv *bat_priv = priv; /* sequence number is slightly older. We already got a sequence number - * higher than this one, so we just mark it. */ - - if ((seq_num_diff <= 0) && (seq_num_diff > -TQ_LOCAL_WINDOW_SIZE)) { + * higher than this one, so we just mark it. + */ + if (seq_num_diff <= 0 && seq_num_diff > -BATADV_TQ_LOCAL_WINDOW_SIZE) { if (set_mark) - bat_set_bit(seq_bits, -seq_num_diff); + batadv_set_bit(seq_bits, -seq_num_diff); return 0; } /* sequence number is slightly newer, so we shift the window and - * set the mark if required */ - - if ((seq_num_diff > 0) && (seq_num_diff < TQ_LOCAL_WINDOW_SIZE)) { - bat_bitmap_shift_left(seq_bits, seq_num_diff); + * set the mark if required + */ + if (seq_num_diff > 0 && seq_num_diff < BATADV_TQ_LOCAL_WINDOW_SIZE) { + batadv_bitmap_shift_left(seq_bits, seq_num_diff); if (set_mark) - bat_set_bit(seq_bits, 0); + batadv_set_bit(seq_bits, 0); return 1; } /* sequence number is much newer, probably missed a lot of packets */ - - if ((seq_num_diff >= TQ_LOCAL_WINDOW_SIZE) && - (seq_num_diff < EXPECTED_SEQNO_RANGE)) { - bat_dbg(DBG_BATMAN, bat_priv, - "We missed a lot of packets (%i) !\n", - seq_num_diff - 1); - bitmap_zero(seq_bits, TQ_LOCAL_WINDOW_SIZE); + if (seq_num_diff >= BATADV_TQ_LOCAL_WINDOW_SIZE && + seq_num_diff < BATADV_EXPECTED_SEQNO_RANGE) { + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "We missed a lot of packets (%i) !\n", + seq_num_diff - 1); + bitmap_zero(seq_bits, BATADV_TQ_LOCAL_WINDOW_SIZE); if (set_mark) - bat_set_bit(seq_bits, 0); + batadv_set_bit(seq_bits, 0); return 1; } /* received a much older packet. The other host either restarted * or the old packet got delayed somewhere in the network. The * packet should be dropped without calling this function if the - * seqno window is protected. */ - - if ((seq_num_diff <= -TQ_LOCAL_WINDOW_SIZE) || - (seq_num_diff >= EXPECTED_SEQNO_RANGE)) { + * seqno window is protected. + */ + if (seq_num_diff <= -BATADV_TQ_LOCAL_WINDOW_SIZE || + seq_num_diff >= BATADV_EXPECTED_SEQNO_RANGE) { - bat_dbg(DBG_BATMAN, bat_priv, - "Other host probably restarted!\n"); + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "Other host probably restarted!\n"); - bitmap_zero(seq_bits, TQ_LOCAL_WINDOW_SIZE); + bitmap_zero(seq_bits, BATADV_TQ_LOCAL_WINDOW_SIZE); if (set_mark) - bat_set_bit(seq_bits, 0); + batadv_set_bit(seq_bits, 0); return 1; } |