- 09 11月, 2009 8 次提交
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由 Eric Dumazet 提交于
IPV6 UDP multicast rx path is a bit complex and can hold a spinlock for a long time. Using a small (32 or 64 entries) stack of socket pointers can help to perform expensive operations (skb_clone(), udp_queue_rcv_skb()) outside of the lock, in most cases. Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Eric Dumazet 提交于
UDP multicast rx path is a bit complex and can hold a spinlock for a long time. Using a small (32 or 64 entries) stack of socket pointers can help to perform expensive operations (skb_clone(), udp_queue_rcv_skb()) outside of the lock, in most cases. It's also a base for a future RCU conversion of multicast recption. Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NLucian Adrian Grijincu <lgrijincu@ixiacom.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Eric Dumazet 提交于
We first locate the (local port) hash chain head If few sockets are in this chain, we proceed with previous lookup algo. If too many sockets are listed, we take a look at the secondary (port, address) hash chain. We choose the shortest chain and proceed with a RCU lookup on the elected chain. But, if we chose (port, address) chain, and fail to find a socket on given address, we must try another lookup on (port, in6addr_any) chain to find sockets not bound to a particular IP. -> No extra cost for typical setups, where the first lookup will probabbly be performed. RCU lookups everywhere, we dont acquire spinlock. Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Eric Dumazet 提交于
We first locate the (local port) hash chain head If few sockets are in this chain, we proceed with previous lookup algo. If too many sockets are listed, we take a look at the secondary (port, address) hash chain we added in previous patch. We choose the shortest chain and proceed with a RCU lookup on the elected chain. But, if we chose (port, address) chain, and fail to find a socket on given address, we must try another lookup on (port, INADDR_ANY) chain to find socket not bound to a particular IP. -> No extra cost for typical setups, where the first lookup will probabbly be performed. RCU lookups everywhere, we dont acquire spinlock. Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Eric Dumazet 提交于
Extends udp_table to contain a secondary hash table. socket anchor for this second hash is free, because UDP doesnt use skc_bind_node : We define an union to hold both skc_bind_node & a new hlist_nulls_node udp_portaddr_node udp_lib_get_port() inserts sockets into second hash chain (additional cost of one atomic op) udp_lib_unhash() deletes socket from second hash chain (additional cost of one atomic op) Note : No spinlock lockdep annotation is needed, because lock for the secondary hash chain is always get after lock for primary hash chain. Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Eric Dumazet 提交于
Union sk_hash with two u16 hashes for udp (no extra memory taken) One 16 bits hash on (local port) value (the previous udp 'hash') One 16 bits hash on (local address, local port) values, initialized but not yet used. This second hash is using jenkin hash for better distribution. Because the 'port' is xored later, a partial hash is performed on local address + net_hash_mix(net) Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Eric Dumazet 提交于
Adds a counter in udp_hslot to keep an accurate count of sockets present in chain. This will permit to upcoming UDP lookup algo to chose the shortest chain when secondary hash is added. Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Stephen Rothwell 提交于
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 08 11月, 2009 3 次提交
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由 Eric W. Biederman 提交于
There is no good reason to not support userspace specifying the network namespace during device creation, and it makes it easier to create a network device and pass it to a child network namespace with a well known name. We have to be careful to ensure that the target network namespace for the new device exists through the life of the call. To keep that logic clear I have factored out the network namespace grabbing logic into rtnl_link_get_net. In addtion we need to continue to pass the source network namespace to the rtnl_link_ops.newlink method so that we can find the base device source network namespace. Signed-off-by: NEric W. Biederman <ebiederm@aristanetworks.com> Acked-by: NEric Dumazet <eric.dumazet@gmail.com>
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由 Joe Perches 提交于
atalk_sum_partial can now use the rol16 function in bitops.h Signed-off-by: NJoe Perches <joe@perches.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Eric Dumazet 提交于
Using RCU helps not touching device refcount in rawv6_bind() Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 07 11月, 2009 10 次提交
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由 Eric Dumazet 提交于
Pure cleanups patch Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Arnd Bergmann 提交于
The x25 driver uses lock_kernel() implicitly through its proto_ops wrapper. The makes the usage explicit in order to get rid of that wrapper and to better document the usage of the BKL. The next step should be to get rid of the usage of the BKL in x25 entirely, which requires understanding what data structures need serialized accesses. Cc: Henner Eisen <eis@baty.hanse.de> Cc: David S. Miller <davem@davemloft.net> Cc: linux-x25@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Arnd Bergmann 提交于
The irda driver uses the BKL implicitly in its protocol operations. Replace the wrapped proto_ops with explicit lock_kernel() calls makes the usage more obvious and shrinks the size of the object code. The calls t lock_kernel() should eventually all be replaced by other serialization methods, which requires finding out The calls t lock_kernel() should eventually all be replaced by other serialization methods, which requires finding out which data actually needs protection. Signed-off-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Arnd Bergmann 提交于
Making the BKL usage explicit in ipx makes it more obvious where it is used, reduces code size and helps getting rid of the BKL in common code. I did not analyse how to kill lock_kernel from ipx entirely, this will involve either proving that it's not needed, or replacing with a proper mutex or spinlock, after finding out which data structures are protected by the lock. Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: David S. Miller <davem@davemloft.net> Cc: Stephen Hemminger <shemminger@vyatta.com> Cc: netdev@vger.kernel.org Signed-off-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Arnd Bergmann 提交于
Making the BKL usage explicit in appletalk makes it more obvious where it is used, reduces code size and helps getting rid of the BKL in common code. I did not analyse how to kill lock_kernel from appletalk entirely, this will involve either proving that it's not needed, or replacing with a proper mutex or spinlock, after finding out which data structures are protected by the lock. Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: David S. Miller <davem@davemloft.net> Cc: Stephen Hemminger <shemminger@vyatta.com> Cc: netdev@vger.kernel.org Signed-off-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Thomas Gleixner 提交于
SPIN_LOCK_UNLOCKED is deprecated. Use DEFINE_SPINLOCK instead. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Arnd Bergmann 提交于
The MII ioctls and SIOCSIFNAME need to go through ifsioc conversion, which they never did so far. Some others are not implemented in the native path, so we can just return -EINVAL directly. Add IFSLAVE ioctls to the EINVAL list and move it to the end to optimize the code path for the common case. Signed-off-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Arnd Bergmann 提交于
This removes the original socket compat_ioctl code from fs/compat_ioctl.c and converts the code from the copy in net/socket.c into a single function. We add a few cycles of runtime to compat_sock_ioctl() with the long switch() statement, but gain some cycles in return by simplifying the call chain to get there. Due to better inlining, save 1.5kb of object size in the process, and enable further savings: before: text data bss dec hex filename 13540 18008 2080 33628 835c obj/fs/compat_ioctl.o 14565 636 40 15241 3b89 obj/net/socket.o after: text data bss dec hex filename 8916 15176 2080 26172 663c obj/fs/compat_ioctl.o 20725 636 40 21401 5399 obj/net/socket.o Signed-off-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Arnd Bergmann 提交于
We must not have a compat ioctl handler for SIOCATALKDIFADDR in common code, because the same number is used in other protocols with different data structures. Signed-off-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Arnd Bergmann 提交于
This makes an identical copy of the socket compat_ioctl code from fs/compat_ioctl.c to net/socket.c, as a preparation for moving the functionality in a way that can be easily reviewed. The code is hidden inside of #if 0 and gets activated in the patch that will make it work. Signed-off-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 06 11月, 2009 19 次提交
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由 Dmitry Eremin-Solenikov 提交于
Add support for two more NL802154 commands: ADD_IFACE and DEL_IFACE, thus allowing creation and removal of logic WPAN interfaces on the top of wpan-phy. Signed-off-by: NDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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由 Dmitry Eremin-Solenikov 提交于
Signed-off-by: NDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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由 Dmitry Eremin-Solenikov 提交于
Add two nl802154 helpers: one for starting a reply message, one for sending. Signed-off-by: NDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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由 Dmitry Eremin-Solenikov 提交于
Add nl802154 command to get information about PHY's present in the system. Signed-off-by: NDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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由 Dmitry Eremin-Solenikov 提交于
Move all mac-related stuff to separate file so that ieee802154/netlink.c contains only generic code. Signed-off-by: NDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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由 Dmitry Eremin-Solenikov 提交于
There is no real need to have ieee802154 interfaces separate into several small modules, as neither of them has it's own use. Signed-off-by: NDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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由 Dmitry Eremin-Solenikov 提交于
Follow the usual pattern of devices registration by adding new function (wpan_phy_set_dev) that sets child->parent relationship and removing parent argument from wpan_phy_register call. Signed-off-by: NDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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由 Dmitry Eremin-Solenikov 提交于
IEEE 802.15.4-2006 defines channel pages that hold channels (max 32 pages, 27 channels per page). Allow the driver to specify supported channels on pages, other than the first one. Signed-off-by: NDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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由 Dmitry Eremin-Solenikov 提交于
Use snprintf to limit the amount of chars put in the buffer for attr -> show. Signed-off-by: NDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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由 Dmitry Eremin-Solenikov 提交于
Set page to zero (for compatibility w/ devices supporting only first page). Also init channel by default to -1 to disallow transfers for non-initialised devices. Signed-off-by: NDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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由 Dmitry Eremin-Solenikov 提交于
Add API to iterate over the wpan-phy instances. Signed-off-by: NDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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由 Eric Dumazet 提交于
While working on device refcount stuff, I found a device refcount leak through DECNET. This nasty bug can be used to hold refcounts on any !DECNET netdevice. Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Jozsef Kadlecsik 提交于
Vitezslav Samel discovered that since 2.6.30.4+ active FTP can not work over NAT. The "cause" of the problem was a fix of unacknowledged data detection with NAT (commit a3a9f79e). However, actually, that fix uncovered a long standing bug in TCP conntrack: when NAT was enabled, we simply updated the max of the right edge of the segments we have seen (td_end), by the offset NAT produced with changing IP/port in the data. However, we did not update the other parameter (td_maxend) which is affected by the NAT offset. Thus that could drift away from the correct value and thus resulted breaking active FTP. The patch below fixes the issue by *not* updating the conntrack parameters from NAT, but instead taking into account the NAT offsets in conntrack in a consistent way. (Updating from NAT would be more harder and expensive because it'd need to re-calculate parameters we already calculated in conntrack.) Signed-off-by: NJozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: NPatrick McHardy <kaber@trash.net> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
net/core/sock.c: In function 'sock_setsockopt': net/core/sock.c:396: warning: 'index' may be used uninitialized in this function net/core/sock.c:396: note: 'index' was declared here GCC can't see that all paths initialize index, so just set it to the default (0) and eliminate the specific code block that handles the null device name string. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Eric Dumazet 提交于
cur_pkt_size can be changed in proc fs while pktgen is running, we better use a private field to get precise tx-bytes counter. Signed-off-by: NBen Greear <greearb@candelatech.com> Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Eric Dumazet 提交于
Avoid dev_hold()/dev_put() in sock_bindtodevice() Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Eric Dumazet 提交于
When sending fragmentation expiration ICMP V4/V6 messages, we can avoid touching device refcount, thanks to RCU Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Eric Dumazet 提交于
We hold RTNL in tc_dump_tfilter(), we can avoid dev_hold()/dev_put() Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Eric Dumazet 提交于
Avoid touching device refcount in sctp/ipv6, thanks to RCU Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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