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2014-01-15etherdevice: Use ether_addr_copy to copy an Ethernet addressJoe Perches1-1/+23
Some systems can use the normally known u16 alignment of Ethernet addresses to save some code/text bytes and cycles. This does not change currently emitted code on x86 by gcc 4.8. Signed-off-by: Joe Perches <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-12-09etherdevice: Optimize a few is_<foo>_ether_addr functionsJoe Perches1-2/+23
If CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is set, several is_<foo>_ether_addr functions can be slightly improved by using u32 dereferences. I believe all current uses of is_zero_ether_addr and is_broadcast_ether_addr are u16 aligned, so always use u16 references to improve those functions performance. Document the u16 alignment requirements. Signed-off-by: Joe Perches <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-12-09etherdevice: Add ether_addr_equal_unalignedJoe Perches1-0/+18
Add a generic routine to test if possibly unaligned to u16 Ethernet addresses are equal. If CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is set, this uses the slightly faster generic routine ether_addr_equal, otherwise this uses memcmp. Signed-off-by: Joe Perches <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-12-06ether_addr_equal: Optimize implementation, remove unused compare_ether_addrJoe Perches1-33/+18
Add a new check for CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS to reduce the number of or's used in the ether_addr_equal comparison to very slightly improve function performance. Simplify the ether_addr_equal_64bits implementation. Integrate and remove the zap_last_2bytes helper as it's now used only once. Remove the now unused compare_ether_addr function. Update the unaligned-memory-access documentation to remove the compare_ether_addr description and show how unaligned accesses could occur with ether_addr_equal. Signed-off-by: Joe Perches <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-09-26[networking]device.h: Remove extern from function prototypesJoe Perches1-19/+16
There are a mix of function prototypes with and without extern in the kernel sources. Standardize on not using extern for function prototypes. Function prototypes don't need to be written with extern. extern is assumed by the compiler. Its use is as unnecessary as using auto to declare automatic/local variables in a block. Signed-off-by: Joe Perches <[email protected]>
2013-09-03net: etherdevice: add address inherit helperBjørn Mork1-0/+15
Some etherdevices inherit their address from a parent or master device. The addr_assign_type should be updated along with the address in these cases. Adding a helper function to simplify this. Signed-off-by: Bjørn Mork <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-01-21net: split eth_mac_addr for better error handlingStefan Hajnoczi1-0/+2
When we set mac address, software mac address in system and hardware mac address all need to be updated. Current eth_mac_addr() doesn't allow callers to implement error handling nicely. This patch split eth_mac_addr() to prepare part and real commit part, then we can prepare first, and try to change hardware address, then do the real commit if hardware address is set successfully. Signed-off-by: Stefan Hajnoczi <[email protected]> Signed-off-by: Amos Kong <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-01-03net: set dev->addr_assign_type correctlyJiri Pirko1-1/+1
Not a bitfield, but a plain value. Signed-off-by: Jiri Pirko <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-02eth: Rename and properly align br_reserved_address arrayBen Hutchings1-2/+3
Since this array is no longer part of the bridge driver, it should have an 'eth' prefix not 'br'. We also assume that either it's 16-bit-aligned or the architecture has efficient unaligned access. Ensure the first of these is true by explicitly aligning it. Signed-off-by: Ben Hutchings <[email protected]> Acked-by: John Fastabend <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-02eth: Make is_link_local() consistent with other address testsBen Hutchings1-3/+3
Function name should include '_ether_addr'. Return type should be bool. Parameter name should be 'addr' not 'dest' (also matching kernel-doc). Signed-off-by: Ben Hutchings <[email protected]> Acked-by: John Fastabend <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-10-29net, ixgbe: handle link local multicast addresses in SR-IOV modeJohn Fastabend1-0/+19
In SR-IOV mode the PF driver acts as the uplink port and is used to send control packets e.g. lldpad, stp, etc. eth0.1 eth0.2 eth0 VF VF PF | | | <-- stand-in for uplink | | | -------------------------- | Embedded Switch | -------------------------- | MAC <-- uplink But the embedded switch is setup to forward multicast addresses to all interfaces both VFs and PF and onto the physical link. This results in reserved MAC addresses used by control protocols to be forwarded over the switch onto the VF. In the LLDP case the PF sends an LLDPDU and it is currently being forwarded to all the VFs who then see the PF as a peer. This is incorrect. This patch adds the multicast addresses to the RAR table in the hardware to prevent this behavior. Signed-off-by: John Fastabend <[email protected]> Tested-by: Phil Schmitt <[email protected]> Tested-by: Sibai Li <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2012-09-10etherdevice: introduce help function eth_zero_addr()Duan Jiong1-0/+11
a lot of code has either the memset or an inefficient copy from a static array that contains the all-zeros Ethernet address. Introduce help function eth_zero_addr() to fill an address with all zeros, making the code clearer and allowing us to get rid of some constant arrays. Signed-off-by: Duan Jiong <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-07-16etherdevice: Rename random_ether_addr to eth_random_addrJoe Perches1-6/+8
Add some API symmetry to eth_broadcast_addr and add a #define to the old name for backward compatibility. Signed-off-by: Joe Perches <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-07-10etherdevice: introduce eth_broadcast_addrJohannes Berg1-0/+11
A lot of code has either the memset or an inefficient copy from a static array that contains the all-ones broadcast address. Introduce eth_broadcast_addr() to fill an address with all ones, making the code clearer and allowing us to get rid of some constant arrays. Signed-off-by: Johannes Berg <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-05-17etherdevice: fix commentsstephen hemminger1-8/+6
Fix some minor problems in comments of etherdevice.h * Warning is out dated, file hasn't moved or disappeared in many years and is unlikely to do so soon. * Capitalize Ethernet consistently since it is a proper name * Fix descriptive comment of padding * Spelling and grammar fix for alignment comment Signed-off-by: Stephen Hemminger <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-05-12etherdevice: Remove now unused compare_ether_addr_64bitsJoe Perches1-33/+13
Move and invert the logic from the otherwise unused compare_ether_addr_64bits to ether_addr_equal_64bits. Neaten the logic in is_etherdev_addr. Signed-off-by: Joe Perches <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-05-10etherdevice.h: Add ether_addr_equal_64bitsJoe Perches1-0/+20
Add an optimized boolean function to check if 2 ethernet addresses are the same. This is to avoid any confusion about compare_ether_addr_64bits returning an unsigned, and not being able to use the compare_ether_addr_64bits function for sorting ala memcmp. Signed-off-by: Joe Perches <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-05-09etherdevice.h: Add ether_addr_equalJoe Perches1-0/+12
Add a boolean function to check if 2 ethernet addresses are the same. This is to avoid any confusion about compare_ether_addr returning an unsigned, and not being able to use the compare_ether_addr function for sorting ala memcmp. Signed-off-by: Joe Perches <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-05-08etherdev.h: Convert int is_<foo>_ether_addr to boolJoe Perches1-6/+6
Make the return value explicitly true or false. Signed-off-by: Joe Perches <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-05-07net: compare_ether_addr[_64bits]() has no orderingJohannes Berg1-5/+6
Neither compare_ether_addr() nor compare_ether_addr_64bits() (as it can fall back to the former) have comparison semantics like memcmp() where the sign of the return value indicates sort order. We had a bug in the wireless code due to a blind memcmp replacement because of this. A cursory look suggests that the wireless bug was the only one due to this semantic difference. Signed-off-by: Johannes Berg <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-02-13rename dev_hw_addr_random and remove redundant secondDanny Kukawka1-6/+7
Renamed dev_hw_addr_random to eth_hw_addr_random() to reflect that this function only assign a random ethernet address (MAC). Removed the second parameter (u8 *hwaddr), it's redundant since the also given net_device already contains net_device->dev_addr. Set it directly. Adapt igbvf and ixgbevf to the changed function. Small fix for ixgbevf_probe(): if ixgbevf_sw_init() fails (which means the device got no dev_addr) handle the error and jump to err_sw_init as already done by igbvf in similar case. Signed-off-by: Danny Kukawka <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2011-07-13net: Push protocol type directly down to header_ops->cache()David S. Miller1-1/+1
Signed-off-by: David S. Miller <[email protected]>
2011-01-13etherdevice.h: Add is_unicast_ether_addr functionTobias Klauser1-0/+11
From a check for !is_multicast_ether_addr it is not always obvious that we're checking for a unicast address. So add this helper function to make those code paths easier to read. Signed-off-by: Tobias Klauser <[email protected]> Acked-by: Chris Metcalf <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2011-01-10net: Add alloc_netdev_mqs functionTom Herbert1-1/+3
Added alloc_netdev_mqs function which allows the number of transmit and receive queues to be specified independenty. alloc_netdev_mq was changed to a macro to call the new function. Also added alloc_etherdev_mqs with same purpose. Signed-off-by: Tom Herbert <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2010-09-23net: return operator cleanupEric Dumazet1-2/+2
Change "return (EXPR);" to "return EXPR;" return is not a function, parentheses are not required. Signed-off-by: Eric Dumazet <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2010-08-26gro: __napi_gro_receive() optimizationsEric Dumazet1-1/+17
compare_ether_header() can have a special implementation on 64 bit arches if CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is defined. __napi_gro_receive() and vlan_gro_common() can avoid a conditional branch to perform device match. On x86_64, __napi_gro_receive() has now 38 instructions instead of 53 As gcc-4.4.3 still choose to not inline it, add inline keyword to this performance critical function. Signed-off-by: Eric Dumazet <[email protected]> CC: Herbert Xu <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2010-08-10etherdevice.h: fix kernel-doc typoRandy Dunlap1-1/+1
Fix etherdevice.h parameter name typo in kernel-doc: Warning(include/linux/etherdevice.h:138): No description found for parameter 'hwaddr' Warning(include/linux/etherdevice.h:138): Excess function parameter 'addr' description in 'dev_hw_addr_random' Signed-off-by: Randy Dunlap <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2010-07-24sysfs: add attribute to indicate hw address assignment typeStefan Assmann1-0/+14
Add addr_assign_type to struct net_device and expose it via sysfs. This new attribute has the purpose of giving user-space the ability to distinguish between different assignment types of MAC addresses. For example user-space can treat NICs with randomly generated MAC addresses differently than NICs that have permanent (locally assigned) MAC addresses. For the former udev could write a persistent net rule by matching the device path instead of the MAC address. There's also the case of devices that 'steal' MAC addresses from slave devices. In which it is also be beneficial for user-space to be aware of the fact. This patch also introduces a helper function to assist adoption of drivers that generate MAC addresses randomly. Signed-off-by: Stefan Assmann <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2009-05-05net: introduce a list of device addresses dev_addr_list (v6)Jiri Pirko1-0/+27
v5 -> v6 (current): -removed so far unused static functions -corrected dev_addr_del_multiple to call del instead of add v4 -> v5: -added device address type (suggested by davem) -removed refcounting (better to have simplier code then safe potentially few bytes) v3 -> v4: -changed kzalloc to kmalloc in __hw_addr_add_ii() -ASSERT_RTNL() avoided in dev_addr_flush() and dev_addr_init() v2 -> v3: -removed unnecessary rcu read locking -moved dev_addr_flush() calling to ensure no null dereference of dev_addr v1 -> v2: -added forgotten ASSERT_RTNL to dev_addr_init and dev_addr_flush -removed unnecessary rcu_read locking in dev_addr_init -use compare_ether_addr_64bits instead of compare_ether_addr -use L1_CACHE_BYTES as size for allocating struct netdev_hw_addr -use call_rcu instead of rcu_synchronize -moved is_etherdev_addr into __KERNEL__ ifdef This patch introduces a new list in struct net_device and brings a set of functions to handle the work with device address list. The list is a replacement for the original dev_addr field and because in some situations there is need to carry several device addresses with the net device. To be backward compatible, dev_addr is made to point to the first member of the list so original drivers sees no difference. Signed-off-by: Jiri Pirko <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2009-02-08gro: Optimise Ethernet header comparisonHerbert Xu1-0/+21
This patch optimises the Ethernet header comparison to use 2-byte and 4-byte xors instead of memcmp. In order to facilitate this, the actual comparison is now carried out by the callers of the shared dev_gro_receive function. This has a significant impact when receiving 1500B packets through 10GbE. Signed-off-by: Herbert Xu <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2008-11-23eth: Declare an optimized compare_ether_addr_64bits() functionEric Dumazet1-0/+42
Linus mentioned we could try to perform long word operations, even on potentially unaligned addresses, on x86 at least. David mentioned the HAVE_EFFICIENT_UNALIGNED_ACCESS test to handle this on all arches that have efficient unailgned accesses. I tried this idea and got nice assembly on 32 bits: 158: 33 82 38 01 00 00 xor 0x138(%edx),%eax 15e: 33 8a 34 01 00 00 xor 0x134(%edx),%ecx 164: c1 e0 10 shl $0x10,%eax 167: 09 c1 or %eax,%ecx 169: 74 0b je 176 <eth_type_trans+0x87> And very nice assembly on 64 bits of course (one xor, one shl) Nice oprofile improvement in eth_type_trans(), 0.17 % instead of 0.41 %, expected since we remove 8 instructions on a fast path. This patch implements a compare_ether_addr_64bits() function, that uses the CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS ifdef to efficiently perform the 6 bytes comparison on all capable arches. Signed-off-by: Eric Dumazet <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2008-11-19netdev: expose ethernet address primitivesStephen Hemminger1-0/+4
When ethernet devices are converted, the function pointer setup by eth_setup() need to be done during intialization. Signed-off-by: Stephen Hemminger <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2008-02-13docbook: make a networking book and fix a few errorsRandy Dunlap1-2/+1
Move networking (core and drivers) docbook to its own networking book. Fix a few kernel-doc errors in header and source files. Signed-off-by: Randy Dunlap <[email protected]> Cc: Trond Myklebust <[email protected]> Cc: "J. Bruce Fields" <[email protected]> Cc: Neil Brown <[email protected]> Cc: "David S. Miller" <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-10-10[NET]: Move hardware header operations out of netdevice.Stephen Hemminger1-8/+12
Since hardware header operations are part of the protocol class not the device instance, make them into a separate object and save memory. Signed-off-by: Stephen Hemminger <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2007-07-10[CORE] Stack changes to add multiqueue hardware support APIPeter P Waskiewicz Jr1-1/+2
Add the multiqueue hardware device support API to the core network stack. Allow drivers to allocate multiple queues and manage them at the netdev level if they choose to do so. Added a new field to sk_buff, namely queue_mapping, for drivers to know which tx_ring to select based on OS classification of the flow. Signed-off-by: Peter P Waskiewicz Jr <[email protected]> Signed-off-by: Patrick McHardy <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2007-07-10[NET]: Kill eth_copy_and_sum().David S. Miller1-6/+0
It hasn't "summed" anything in over 7 years, and it's just a straight mempcy ala skb_copy_to_linear_data() so just get rid of it. Signed-off-by: David S. Miller <[email protected]>
2007-05-07uml: improve checking and diagnostics of ethernet MACsPaolo 'Blaisorblade' Giarrusso1-0/+12
Improve checking and diagnostics for broadcast and multicast Ethernet MAC addresses, and distinguish between those cases in output; also make sure the device is assigned a MAC address valid only locally to avoid collisions. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[email protected]> Signed-off-by: Jeff Dike <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-03[NET]: Don't exclude broadcast addresses from is_multicast_ether_addr()Stephen Hemminger1-1/+2
The check for multicast shouldn't exclude broadcast type addresses. This reverts the incorrect change done in 2.6.13. The broadcast address is a multicast address and should be excluded from being a valid_ether_address for use in bridging or device address. Signed-off-by: Stephen Hemminger <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2005-11-02[ETHERNET]: Add ether stuff to docbookStephen Hemminger1-9/+15
Fix up etherdevice docbook comments and make them (and other networking stuff) get dragged into the kernel-api. Delete the old 8390 stuff, it really isn't interesting anymore. Signed-off-by: Stephen Hemminger <[email protected]> Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2005-11-02[ETHERNET]: Optimize is_broadcast_ether_addrStephen Hemminger1-2/+1
Optimize the match for broadcast address by using bit operations instead of comparison. This saves a number of conditional branches, and generates smaller code. Signed-off-by: Stephen Hemminger <[email protected]> Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2005-10-29[ETH]: ether address compareStephen Hemminger1-0/+16
Expose faster ether compare for use by protocols and other driver. And change name to be more consistent with other ether address manipulation routines in same file Signed-off-by: Stephen Hemminger <[email protected]> Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2005-07-13Merge upstream 2.6.13-rc3 into ieee80211 branch of netdev-2.6.Jeff Garzik1-1/+1
2005-07-12[NET]: __be'ify *_type_trans()Alexey Dobriyan1-1/+1
tr_type_trans(), hippi_type_trans() left as-is. Signed-off-by: Alexey Dobriyan <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2005-06-30Merge upstream 2.6.13-rc1-git1 into 'ieee80211' branch of netdev-2.6.Jeff Garzik1-0/+1
2005-06-28[NET]: Add missing include to linux/netdevice.hArnd Bergmann1-0/+1
linux/etherdevice.h can't be included standalone at the moment, which is required in order to sort the header files in the recommended alphabetic order. This patch fixes that and is needed to build spider_net. Signed-off-by: Arnd Bergmann <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2005-06-28wireless: fix ipw warning; add is_broadcast_ether_addr() to linux/etherdevice.hJeff Garzik1-0/+6
2005-06-27Update is_multicast_ether_addr() definition; net/ieee80211.h cleanups.Jeff Garzik1-1/+1
2005-05-29[NET]: Add is_multicast_ether_addr() in include/linux/etherdevice.hMichael Ellerman1-4/+18
This patch adds is_multicast_ether_addr() to go along with is_valid_ether_addr() and friends. It then changes is_valid_ether_addr() to use the new macro, and fixes up the comment on that function to move implementation details out of the API doco. Signed-off-by: Michael Ellerman <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2005-05-05[PATCH] update Ross Biro bouncing email addressJesper Juhl1-1/+1
Ross moved. Remove the bad email address so people will find the correct one in ./CREDITS. Signed-off-by: Jesper Juhl <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2005-04-16Linux-2.6.12-rc2Linus Torvalds1-0/+88
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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