- 09 Jun, 2009 20 commits
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Sergey Lapin authored
Add a netlink interface for configuration of IEEE 802.15.4 device. Also this interface specifies events notification sent by devices towards higher layers. Signed-off-by:
Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by:
Sergey Lapin <slapin@ossfans.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Sergey Lapin authored
Add support for communication over IEEE 802.15.4 networks. This implementation is neither certified nor complete, but aims to that goal. This commit contains only the socket interface for communication over IEEE 802.15.4 networks. One can either send RAW datagrams or use SOCK_DGRAM to encapsulate data inside normal IEEE 802.15.4 packets. Configuration interface, drivers and software MAC 802.15.4 implementation will follow. Initial implementation was done by Maxim Gorbachyov, Maxim Osipov and Pavel Smolensky as a research project at Siemens AG. Later the stack was heavily reworked to better suit the linux networking model, and is now maitained as an open project partially sponsored by Siemens. Signed-off-by:
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Sergey Lapin authored
IEEE 802.15.4 stack requires several constants to be defined/adjusted. Signed-off-by:
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Jarek Poplawski authored
Change PSCHED_SHIFT from 10 to 6 to increase schedulers time resolution. This will increase 16x a number of (internal) ticks per nanosecond, and is needed to improve accuracy of schedulers based on rate tables, like HTB, TBF or CBQ, with rates above 100Mbit. It is assumed this change is safe for 32bit accounting of time diffs up to 2 minutes, which should be enough for common use (extremely low rate values may overflow, so get inaccurate instead). To make full use of this change an updated iproute2 will be needed. (But using older iproute2 should be safe too.) This change breaks ticks - microseconds similarity, so some minor code fixes might be needed. It is also planned to change naming adequately eg. to PSCHED_TICKS2NS() etc. in the near future. Reported-by:
Antonio Almeida <vexwek@gmail.com> Tested-by:
Jarek Poplawski <jarkao2@gmail.com> Signed-off-by:
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Jarek Poplawski authored
Use PSCHED_SHIFT constant instead of '10' in PSCHED_US2NS() and PSCHED_NS2US() macros to enable changing this value later. Additionally use PSCHED_SHIFT in sch_hfsc SM_SHIFT and ISM_SHIFT definitions. This part of the patch is based on feedback from Patrick McHardy <kaber@trash.net>. Reported-by:
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Eric Dumazet authored
commit f001fde5 (net: introduce a list of device addresses dev_addr_list (v6)) added one regression Vegard Nossum found in its testings. With kmemcheck help, Vegard found some uninitialized memory was read and reported to user, potentialy leaking kernel data. ( thread can be found on http://lkml.org/lkml/2009/5/30/177 ) dev_addr_init() incorrectly uses sizeof() operator. We were initializing one byte instead of MAX_ADDR_LEN bytes. Reported-by:
Vegard Nossum <vegard.nossum@gmail.com> Signed-off-by:
Eric Dumazet <eric.dumazet@gmail.com> Acked-by:
Jiri Pirko <jpirko@redhat.com> Signed-off-by:
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David S. Miller authored
This driver does not indicate support for frag lists. Furthermore, even if it did, the code is walking the frag lists incorrectly. The idiom is: for (iter = skb_shinfo(skb)->frag_list; iter; iter = iter->next) but it's doing: for (iter = skb_shinfo(skb)->frag_list; iter; iter = skb_shinfo(iter)->frag_list) which would never work. And this proves that this driver never saw an SKB with active frag lists. So just remove the code altogether and the driver TX path becomes much simpler. Signed-off-by: -
David S. Miller authored
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David S. Miller authored
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David S. Miller authored
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David S. Miller authored
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David S. Miller authored
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David S. Miller authored
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David S. Miller authored
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David S. Miller authored
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David S. Miller authored
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David S. Miller authored
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David S. Miller authored
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David S. Miller authored
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David S. Miller authored
With the hope that these can be used to eliminate direct references to the frag list implementation. Signed-off-by:
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- 08 Jun, 2009 20 commits
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David S. Miller authored
Furthermore, it twiddles with the details of SKB list handling directly, which we're trying to eliminate. Signed-off-by: -
Maciej W. Rozycki authored
A driver overhaul on 29 Feb 2000 (!) broke locking around fiddling with the tx descriptor ring in start_xmit(); a follow-on "fix" removed the broken remnants altogether. Here's a patch to restore proper locking in the function -- the complement in the interrupt handler has been correct all the time. This *may* have been the reason for the occasional confusion of the chip -- triggering a tx timeout followed by a chip reset sequence -- seen on R4k-based DECstations with the onboard Ethernet interface. Another theory is the confusion is due to an unindentified problem -- perhaps a silicon erratum -- associated with the variation of the MT ASIC used to interface the R4k CPU to the rest of the system on these computers; with its aggressive write-back buffering the design is particularly weakly ordered when it comes to MMIO (in the absence of ordering barriers uncached reads are allowed to bypass earlier uncached writes, even if to the same location), which may trigger all kinds of corner cases in peripheral hardware as well as software. Either way this piece of code is buggy. Signed-off-by:
Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by:
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Tilman Schmidt authored
Clarify calling context and return codes of callback methods, and add a description of the _cmsg structure and helper functions. Impact: documentation Signed-off-by:
Tilman Schmidt <tilman@imap.cc> Signed-off-by:
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Tilman Schmidt authored
The dereferencing of the private pointer cmsg->m in capi_cmsg2str() may cause an Oops in case of an error, which is particularly inconvenient as that function is typically used to format an error message. Add a NULL pointer check to avoid this. Impact: error handling improvement Signed-off-by:
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Tilman Schmidt authored
Add kerneldoc comments for the exported funtions in capiutil.c. Impact: documentation Signed-off-by:
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Tilman Schmidt authored
Change the name of the Kernel CAPI exported function capi_ctr_reseted() to something representing its purpose better. Impact: renaming, no functional change Signed-off-by:
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Eric W. Biederman authored
It is possible for tun_chr_close to race with dellink on the a tun device. In which case if __tun_get runs before dellink but dellink runs before tun_chr_close calls unregister_netdevice we will attempt to unregister the netdevice after it is already gone. The two cases are already serialized on the rtnl_lock, so I have gone for the cheap simple fix of moving rtnl_lock to cover __tun_get in tun_chr_close. Eliminating the possibility of the tun device being unregistered between __tun_get and unregister_netdevice in tun_chr_close. Signed-off-by:
Eric W. Biederman <ebiederm@aristanetworks.com> Tested-by:
David Woodhouse <David.Woodhouse@intel.com> Signed-off-by:
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Andre Detsch authored
BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)) was being hit during e100 EEH recovery. The problem source was a napi_enable call being made during e100_io_error_detected. Napi should remain disabled after e100_down, and only be reenabled when the interface is recovered. This patch also updates e100_io_error_detected in order to make it similar to the current versions of the error_detected callback in drivers such as e1000e and ixgbe. Signed-off-by:
Andre Detsch <adetsch@br.ibm.com> Signed-off-by:
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Figo.zhang authored
vfree() does its own 'NULL' check, so no need for check before calling it. Signed-off-by:
Figo.zhang <figo1802@gmail.com> Signed-off-by:
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Yevgeny Petrilin authored
If mlx4_create_eq() would fail for one of EQ's assigned for completion handling, the code would try to free the same EQ we failed to create. The crash was found by Christoph Lameter Signed-off-by:
Yevgeny Petrilin <yevgenyp@mellanox.co.il> Signed-off-by:
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Sridhar Samudrala authored
Use the right structure while incrementing the offset in tun_get_user. Signed-off-by:
Sridhar Samudrala <sri@us.ibm.com> Acked-by:
Michael S. Tsirkin <mst@redhat.com> Signed-off-by:
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Sridhar Samudrala authored
Increment the iovec base by the offset passed in for the initial copy_to_user() in memcpy_to_iovecend(). Signed-off-by:
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Sridhar Samudrala authored
I am working on enabling UFO between KVM guests using virtio-net and i have some patches that i got working with 2.6.30-rc8. When i wanted to try them with net-next-2.6, i noticed that virtio-net is not working with that tree. After some debugging, it turned out to be several bugs in the recent patches to fix aio with tun driver, specifically the following 2 commits. http://git.kernel.org/?p=linux/kernel/git/davem/net-next-2.6.git;a=commitdiff;h=0a1ec07a67bd8b0033dace237249654d015efa21 http://git.kernel.org/?p=linux/kernel/git/davem/net-next-2.6.git;a=commitdiff;h=6f26c9a7555e5bcca3560919db9b852015077dae Fix the call to memcpy_from_iovecend() in skb_copy_datagram_from_iovec to pass the right iovec offset. Signed-off-by:
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Eric Dumazet authored
skb_dma_unmap() is quite expensive for small packets, because we use two different cache lines from skb_shared_info. One to access nr_frags, one to access dma_maps[0] Instead of dma_maps being an array of MAX_SKB_FRAGS + 1 elements, let dma_head alone in a new dma_head field, close to nr_frags, to reduce cache lines misses. Tested on my dev machine (bnx2 & tg3 adapters), nice speedup ! Signed-off-by:
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Eric Dumazet authored
Get rid of num_dma_maps in struct skb_shared_info, as it seems unused. Signed-off-by:
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Tobias Klauser authored
Remove the private definition of TRUE/FALSE and use the ones from linux/stddef.h. Also remove the definition of BOOL which is not referenced inside the driver anyway. Signed-off-by:
Tobias Klauser <tklauser@distanz.ch> Signed-off-by:
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Paulius Zaleckas authored
Signed-off-by:
Paulius Zaleckas <paulius.zaleckas@teltonika.lt> Signed-off-by:
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Richard R�öjfors authored
This is a driver for the Micrel KS8842 ethernet switch. The supplied code is for driving the KS8842 through the Timberdale FPGA on the Russellville board, a development board for Intel Atom CPU in the automotive area. Signed-off-by:
Richard Röjfors <richard.rojfors.ext@mocean-labs.com> Signed-off-by:
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Herbert Xu authored
On Thu, Jun 04, 2009 at 09:06:00PM +1000, Herbert Xu wrote: > > tun: Optimise handling of bogus gso->hdr_len > > As all current versions of virtio_net generate a value for the > header length that's too small, we should optimise this so that > we don't copy it twice. This can be done by ensuring that it is > at least as large as the place where we'll write the checksum. > > Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> With this applied we can strengthen the partial checksum check: In skb_partial_csum_set we check to see if the checksum offset is within the packet. However, we really should check that it is within the skb head as that's the only bit we can modify without copying. Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Acked-by:
Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
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Herbert Xu authored
As all current versions of virtio_net generate a value for the header length that's too small, we should optimise this so that we don't copy it twice. This can be done by ensuring that it is at least as large as the place where we'll write the checksum. Signed-off-by:
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