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* Widen NET_EPOCH coverage.Gleb Smirnoff2019-10-071-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When epoch(9) was introduced to network stack, it was basically dropped in place of existing locking, which was mutexes and rwlocks. For the sake of performance mutex covered areas were as small as possible, so became epoch covered areas. However, epoch doesn't introduce any contention, it just delays memory reclaim. So, there is no point to minimise epoch covered areas in sense of performance. Meanwhile entering/exiting epoch also has non-zero CPU usage, so doing this less often is a win. Not the least is also code maintainability. In the new paradigm we can assume that at any stage of processing a packet, we are inside network epoch. This makes coding both input and output path way easier. On output path we already enter epoch quite early - in the ip_output(), in the ip6_output(). This patch does the same for the input path. All ISR processing, network related callouts, other ways of packet injection to the network stack shall be performed in net_epoch. Any leaf function that walks network configuration now asserts epoch. Tricky part is configuration code paths - ioctls, sysctls. They also call into leaf functions, so some need to be changed. This patch would introduce more epoch recursions (see EPOCH_TRACE) than we had before. They will be cleaned up separately, as several of them aren't trivial. Note, that unlike a lock recursion the epoch recursion is safe and just wastes a bit of resources. Reviewed by: gallatin, hselasky, cy, adrian, kristof Differential Revision: https://reviews.freebsd.org/D19111 Notes: svn path=/head/; revision=353292
* sys/dev: further adoption of SPDX licensing ID tags.Pedro F. Giffuni2017-11-271-0/+2
| | | | | | | | | | | | | | | Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Notes: svn path=/head/; revision=326255
* sys/dev: Replace zero with NULL for pointers.Pedro F. Giffuni2017-02-201-1/+1
| | | | | | | | | | | Makes things easier to read, plus architectures may set NULL to something different than zero. Found with: devel/coccinelle MFC after: 3 weeks Notes: svn path=/head/; revision=313982
* sys/dev: minor spelling fixes.Pedro F. Giffuni2016-05-031-1/+1
| | | | | | | Most affect comments, very few have user-visible effects. Notes: svn path=/head/; revision=298955
* Mechanically convert to if_inc_counter().Gleb Smirnoff2014-09-191-8/+8
| | | | Notes: svn path=/head/; revision=271849
* The r48589 promised to remove implicit inclusion of if_var.h soon. PrepareGleb Smirnoff2013-10-261-0/+1
| | | | | | | | | | | to this event, adding if_var.h to files that do need it. Also, include all includes that now are included due to implicit pollution via if_var.h Sponsored by: Netflix Sponsored by: Nginx, Inc. Notes: svn path=/head/; revision=257176
* Clean up SIOCSIFDSTADDR usage from ifnet drivers. The ioctl itself isGleb Smirnoff2013-09-111-1/+0
| | | | | | | | | | | extremely outdated, and I doubt that it was ever used for ifnet drivers. It was used for AF_INET sockets in pre-FreeBSD time. Approved by: re (hrs) Sponsored by: Nginx, Inc. Notes: svn path=/head/; revision=255471
* Add const qualifier to the dst parameter of the ifnet if_output method.Gleb Smirnoff2013-04-261-2/+2
| | | | Notes: svn path=/head/; revision=249925
* Tag mbufs of all incoming frames or packets with the interface's FIBBjoern A. Zeeb2011-07-031-0/+1
| | | | | | | | | | | | setting (either default or if supported as set by SIOCSIFFIB, e.g. from ifconfig). Submitted by: Alexander V. Chernikov (melifaro ipfw.ru) Reviewed by: julian MFC after: 2 weeks Notes: svn path=/head/; revision=223741
* Remove duplicate header includesKevin Lo2011-06-281-3/+0
| | | | Notes: svn path=/head/; revision=223624
* Add new tunable 'net.link.ifqmaxlen' to set default send interfaceMaxim Sobolev2010-05-031-1/+1
| | | | | | | | | | | | | queue length. The default value for this parameter is 50, which is quite low for many of today's uses and the only way to modify this parameter right now is to edit if_var.h file. Also add read-only sysctl with the same name, so that it's possible to retrieve the current value. MFC after: 1 month Notes: svn path=/head/; revision=207554
* Change if_output to take a struct route as its fourth argument in orderKip Macy2009-04-161-2/+2
| | | | | | | | | to allow passing a cached struct llentry * down to L2 Reviewed by: rwatson Notes: svn path=/head/; revision=191148
* Fix iicbus_intr, iicbus_write and device_read_ivar prototypes...Warner Losh2009-02-101-3/+3
| | | | Notes: svn path=/head/; revision=188461
* Change the way I2C bus attachment works to allow firmware-assisted busNathan Whitehorn2009-01-061-1/+1
| | | | | | | | | | | | subclasses as are available with PCI. Changes I2C device drivers without real probe logic to return BUS_PROBE_NOWILDWARD to avoid interference with firmware bus enumeration, and reduces the probe priority of the iicbus base driver to allow subclass attachment at higher priority. Discussed on: freebsd-arch Notes: svn path=/head/; revision=186833
* Lock the consumers of the iicbus(4) infrastructure:John Baldwin2008-08-041-70/+86
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | - ad7418(4) uses an sx lock instead of a mtx since the iicbus(4) stuff it calls can sleep (request_bus()). Also, I expanded the locking slightly to serialize writes to data stored in the softc. - Similarly, the icee(4) driver now uses an sx lock instead of a mutex. I also removed the pointless OPENED flag and flags field from the softc. - The locking for the ic(4) driver was a bit trickier: - Add a mutex to the softc to protect softc data. - The driver uses malloc'd buffers that are the size of the interface MTU to send and receive packets. Previously, these were allocated every time the interface was brought up and anytime the MTU was changed, with various races that could result in memory leaks. I changed this to be a bit simpler and more like other NIC drivers in that we allocate buffers during attach for the default MTU size and only reallocate them on MTU changes. The reallocation procedure goes to some lengths with various flags to not replace either the the receive or transmit buffers while the driver is busy receiving or transmitting a packet. - Store the device_t of the driver in the softc instead of detours into new-bus using if_dunit from the ifnet and an even more bizarre detour to get the softc instead of using if_softc. - Drop the driver mutex when invoking netisr_dispatch() to pass the packet up to IP. - Use if_printf(). Notes: svn path=/head/; revision=181305
* Minor style(9) treatment to make things a little more consistantWarner Losh2006-08-211-3/+3
| | | | | | | within iicbus code. Notes: svn path=/head/; revision=161516
* Turn a file that was mostly style(9) compliant to a file that's really closeWarner Losh2006-04-041-140/+114
| | | | | | | | to being completely style(9). The odd-ball indentation in a few places was really distracting. Notes: svn path=/head/; revision=157497
* Propagate rename of IFF_OACTIVE and IFF_RUNNING to IFF_DRV_OACTIVE andRobert Watson2005-08-091-5/+7
| | | | | | | | | | | | | | | | | IFF_DRV_RUNNING, as well as the move from ifnet.if_flags to ifnet.if_drv_flags. Device drivers are now responsible for synchronizing access to these flags, as they are in if_drv_flags. This helps prevent races between the network stack and device driver in maintaining the interface flags field. Many __FreeBSD__ and __FreeBSD_version checks maintained and continued; some less so. Reviewed by: pjd, bz MFC after: 7 days Notes: svn path=/head/; revision=148887
* Fix some long standing bugs in writing to the BPF device attached toDavid Malone2005-06-261-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | a DLT_NULL interface. In particular: 1) Consistently use type u_int32_t for the header of a DLT_NULL device - it continues to represent the address family as always. 2) In the DLT_NULL case get bpf_movein to store the u_int32_t in a sockaddr rather than in the mbuf, to be consistent with all the DLT types. 3) Consequently fix a bug in bpf_movein/bpfwrite which only permitted packets up to 4 bytes less than the MTU to be written. 4) Fix all DLT_NULL devices to have the code required to allow writing to their bpf devices. 5) Move the code to allow writing to if_lo from if_simloop to looutput, because it only applies to DLT_NULL devices but was being applied to other devices that use if_simloop possibly incorrectly. PR: 82157 Submitted by: Matthew Luckie <mjl@luckie.org.nz> Approved by: re (scottl) Notes: svn path=/head/; revision=147611
* Stop embedding struct ifnet at the top of driver softcs. Instead theBrooks Davis2005-06-101-14/+18
| | | | | | | | | | | | | | | | | | | | | | | struct ifnet or the layer 2 common structure it was embedded in have been replaced with a struct ifnet pointer to be filled by a call to the new function, if_alloc(). The layer 2 common structure is also allocated via if_alloc() based on the interface type. It is hung off the new struct ifnet member, if_l2com. This change removes the size of these structures from the kernel ABI and will allow us to better manage them as interfaces come and go. Other changes of note: - Struct arpcom is no longer referenced in normal interface code. Instead the Ethernet address is accessed via the IFP2ENADDR() macro. To enforce this ac_enaddr has been renamed to _ac_enaddr. - The second argument to ether_ifattach is now always the mac address from driver private storage rather than sometimes being ac_enaddr. Reviewed by: sobomax, sam Notes: svn path=/head/; revision=147256
* Since if_ic doesn't contain locking or run with INTR_MPSAFE, markRobert Watson2004-08-131-1/+2
| | | | | | | the interface as IFF_NEEDSGIANT so if_start is run holding Giant. Notes: svn path=/head/; revision=133690
* o eliminate widespread on-stack mbuf use for bpf by introducingSam Leffler2003-12-281-19/+3
| | | | | | | | | | | | | | | | a new bpf_mtap2 routine that does the right thing for an mbuf and a variable-length chunk of data that should be prepended. o while we're sweeping the drivers, use u_int32_t uniformly when when prepending the address family (several places were assuming sizeof(int) was 4) o return M_ASSERTVALID to BPF_MTAP* now that all stack-allocated mbufs have been eliminated; this may better be moved to the bpf routines Reviewed by: arch@ and several others Notes: svn path=/head/; revision=123922
* Replace the if_name and if_unit members of struct ifnet with new membersBrooks Davis2003-10-311-4/+3
| | | | | | | | | | | | | | | | if_xname, if_dname, and if_dunit. if_xname is the name of the interface and if_dname/unit are the driver name and instance. This change paves the way for interface renaming and enhanced pseudo device creation and configuration symantics. Approved By: re (in principle) Reviewed By: njl, imp Tested On: i386, amd64, sparc64 Obtained From: NetBSD (if_xname) Notes: svn path=/head/; revision=121816
* Use __FBSDID().David E. O'Brien2003-08-241-2/+3
| | | | | | | Also some minor style cleanups. Notes: svn path=/head/; revision=119418
* Update netisr handling; Each SWI now registers its queue, and all queueJonathan Lemon2003-03-041-4/+2
| | | | | | | | | | | | | drain routines are done by swi_net, which allows for better queue control at some future point. Packets may also be directly dispatched to a netisr instead of queued, this may be of interest at some installations, but currently defaults to off. Reviewed by: hsu, silby, jayanth, sam Sponsored by: DARPA, NAI Labs Notes: svn path=/head/; revision=111888
* Back out M_* changes, per decision of the TRB.Warner Losh2003-02-191-2/+2
| | | | | | | Approved by: trb Notes: svn path=/head/; revision=111119
* Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.Alfred Perlstein2003-01-211-2/+2
| | | | | | | Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT. Notes: svn path=/head/; revision=109623
* network interface driver changes:Sam Leffler2002-11-141-3/+2
| | | | | | | | | | | | | | | | | o don't strip the Ethernet header from inbound packets; pass packets up the stack intact (required significant changes to some drivers) o reference common definitions in net/ethernet.h (e.g. ETHER_ALIGN) o track ether_ifattach/ether_ifdetach API changes o track bpf changes (use BPF_TAP and BPF_MTAP) o track vlan changes (ifnet capabilities, revised processing scheme, etc.) o use if_input to pass packets "up" o call ether_ioctl for default handling of ioctls Reviewed by: many Approved by: re Notes: svn path=/head/; revision=106937
* Fix misindentation.Poul-Henning Kamp2002-10-161-2/+2
| | | | | | | Spotted by: FlexeLint Notes: svn path=/head/; revision=105214
* Major rework of the iicbus/smbus framework:Nicolas Souchu2002-03-231-4/+6
| | | | | | | | | | | - VIA chipset SMBus controllers added - alpm driver updated - Support for dynamic modules added - bktr FreeBSD smbus updated but not tested - cleanup Notes: svn path=/head/; revision=93023
* Update to C99, s/__FUNCTION__/__func__/,David E. O'Brien2001-12-101-1/+1
| | | | | | | also don't use ANSI string concatenation. Notes: svn path=/head/; revision=87599
* Lock down the network interface queues. The queue mutex must be obtainedJonathan Lemon2000-11-251-7/+2
| | | | | | | | | | | | | | | | | before adding/removing packets from the queue. Also, the if_obytes and if_omcasts fields should only be manipulated under protection of the mutex. IF_ENQUEUE, IF_PREPEND, and IF_DEQUEUE perform all necessary locking on the queue. An IF_LOCK macro is provided, as well as the old (mutex-less) versions of the macros in the form _IF_ENQUEUE, _IF_QFULL, for code which needs them, but their use is discouraged. Two new macros are introduced: IF_DRAIN() to drain a queue, and IF_HANDOFF, which takes care of locking/enqueue, and also statistics updating/start if necessary. Notes: svn path=/head/; revision=69152
* Remove unneeded #include <sys/proc.h> lines.Poul-Henning Kamp2000-10-291-1/+0
| | | | Notes: svn path=/head/; revision=67882
* Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL"Peter Wemm1999-12-291-2/+2
| | | | | | | | | is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come. Notes: svn path=/head/; revision=55205
* Remove NBPF conditionality of bpf calls in most of our network drivers.Poul-Henning Kamp1999-09-251-10/+0
| | | | | | | | | | | | | | | This means that we will not have to have a bpf and a non-bpf version of our driver modules. This does not open any security hole, because the bpf core isn't loadable The drivers left unchanged are the "cross platform" drivers where the respective maintainers are urged to DTRT, whatever that may be. Add a couple of missing FreeBSD tags. Notes: svn path=/head/; revision=51646
* $Id$ -> $FreeBSD$Peter Wemm1999-08-281-1/+1
| | | | Notes: svn path=/head/; revision=50477
* Rename bpfilter to bpf.Dag-Erling Smørgrav1999-07-061-6/+6
| | | | Notes: svn path=/head/; revision=48645
* Move the declaration of the interrupt type from the driver structureDoug Rabson1999-05-081-2/+1
| | | | | | | to the BUS_SETUP_INTR call. Notes: svn path=/head/; revision=46743
* The "easy" fixes for compiling the kernel -Wunused: remove unreferenced staticArchie Cobbs1998-12-071-2/+1
| | | | | | | and local variables, goto labels, and functions declared but not defined. Notes: svn path=/head/; revision=41591
* iicbb is generic support for I2C bit-banging.Nicolas Souchu1998-10-311-2/+2
| | | | | | | Other files: timeout management added to the I2C framework. Notes: svn path=/head/; revision=40782
* Submitted by: nsouchNicolas Souchu1998-09-031-0/+468
Philips I2C bus generic support other new bus architecture. Notes: svn path=/cvs2svn/branches/NSOUCH/; revision=38774
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