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* [NET] core: add RFC2863 operstateStefan Rompf2006-03-207-8/+200
| | | | | | | | | | | | | | | | | this patch adds a dormant flag to network devices, RFC2863 operstate derived from these flags and possibility for userspace interaction. It allows drivers to signal that a device is unusable for user traffic without disabling queueing (and therefore the possibility for protocol establishment traffic to flow) and a userspace supplicant (WPA, 802.1X) to mark a device unusable without changes to the driver. It is the result of our long discussion. However I must admit that it represents what Jamal and I agreed on with compromises towards Krzysztof, but Thomas and Krzysztof still disagree with some parts. Anyway I think it should be applied. Signed-off-by: Stefan Rompf <stefan@loplof.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Ensure to accept redirects from nexthop for the target.YOSHIFUJI Hideaki2006-03-201-43/+47
| | | | | | | | It is possible to get redirects from nexthop of "more-specific" routes. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Add accept_ra_rt_info_max_plen sysctl.YOSHIFUJI Hideaki2006-03-205-1/+36
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Flag RTF_DEFAULT for Route Infomation for ::/0.YOSHIFUJI Hideaki2006-03-201-0/+3
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Add experimental support for Route Information Option in RA ↵YOSHIFUJI Hideaki2006-03-206-1/+191
| | | | | | | (RFC4191). Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Add router_probe_interval sysctl.YOSHIFUJI Hideaki2006-03-205-1/+22
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Add accept_ra_rtr_pref sysctl.YOSHIFUJI Hideaki2006-03-205-1/+32
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Add Router Reachability Probing (RFC4191).YOSHIFUJI Hideaki2006-03-201-0/+39
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Add support for Router Preference (RFC4191).YOSHIFUJI Hideaki2006-03-206-7/+49
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Handle finding the next best route in reachability in ↵YOSHIFUJI Hideaki2006-03-201-10/+18
| | | | | | | BACKTRACK(). Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Try finding the next best route.YOSHIFUJI Hideaki2006-03-201-1/+1
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Clean up rt6_select() code path in ip6_route_{intput,output}().YOSHIFUJI Hideaki2006-03-201-26/+7
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Try selecting better route for non-default routes as well.YOSHIFUJI Hideaki2006-03-201-5/+13
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: More strict check for default routers in rt6_get_dflt_router().YOSHIFUJI Hideaki2006-03-201-0/+1
| | | | | | | Check RTF_ADDRCONF|RTF_DEFAULT in rt6_get_dflt_router(). Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Eliminate lock for default route pointer.YOSHIFUJI Hideaki2006-03-203-131/+69
| | | | | | | And prepare for more advanced router selection. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Clean-up cow'ing in ip6_route_{intput,output}().YOSHIFUJI Hideaki2006-03-201-53/+60
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Convert rt6_cow() to rt6_alloc_cow().YOSHIFUJI Hideaki2006-03-201-32/+25
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Clean up reference counting / unlocking for returning object.YOSHIFUJI Hideaki2006-03-201-14/+15
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Unify two code paths for pmtu disc.YOSHIFUJI Hideaki2006-03-201-14/+4
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Add rt6_alloc_clone() for cloning route allocation.YOSHIFUJI Hideaki2006-03-201-9/+18
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Copy u.dst.error for RTF_REJECT routes when cloning.YOSHIFUJI Hideaki2006-03-201-0/+2
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Set appropriate information before inserting a route.YOSHIFUJI Hideaki2006-03-201-15/+18
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Split up rt6_cow() for future changes.YOSHIFUJI Hideaki2006-03-201-11/+21
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ADDRCONF: Add accept_ra_pinfo sysctl.YOSHIFUJI Hideaki2006-03-205-3/+23
| | | | | | | This controls whether we accept Prefix Information in RAs. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ROUTE: Add accept_ra_defrtr sysctl.YOSHIFUJI Hideaki2006-03-205-1/+26
| | | | | | | | This controls whether we accept default router information in RAs. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ADDRCONF: Split up ipv6_generate_eui64() by device type.YOSHIFUJI Hideaki2006-03-201-38/+53
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: ADDRCONF: Use our standard algorithm for randomized ifid.YOSHIFUJI Hideaki2006-03-203-50/+5
| | | | | | | | | | | | RFC 3041 describes an algorithm to generate random interface identifier. In RFC 3041bis, it is allowed to use different algorithm than one described in RFC 3041. So, let's use our standard pseudo random algorithm to simplify our implementation. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: NEIGHBOUR: Ensure to record time to neigh->updated when neighbour's ↵YOSHIFUJI Hideaki2006-03-201-0/+8
| | | | | | | state changed. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: TUNNEL6: Don't try to add multicast route twice.YOSHIFUJI Hideaki2006-03-201-1/+0
| | | | | | | | | Since addrconf_add_dev() has already called addrconf_add_mroute() to added route for multicast prefix, there's no point to call it again in addrconf_ip6_tnl_config(). Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2006-03-20125-4007/+14175
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: (230 commits) [SPARC64]: Update defconfig. [SPARC64]: Fix 2 bugs in huge page support. [SPARC64]: CONFIG_BLK_DEV_RAM fix [SPARC64]: Optimized TSB table initialization. [SPARC64]: Allow CONFIG_MEMORY_HOTPLUG to build. [SPARC64]: Use SLAB caches for TSB tables. [SPARC64]: Don't kill the page allocator when growing a TSB. [SPARC64]: Randomize mm->mmap_base when PF_RANDOMIZE is set. [SPARC64]: Increase top of 32-bit process stack. [SPARC64]: Top-down address space allocation for 32-bit tasks. [SPARC64] bbc_i2c: Fix cpu check and add missing module license. [SPARC64]: Fix and re-enable dynamic TSB sizing. [SUNSU]: Fix missing spinlock initialization. [TG3]: Do not try to access NIC_SRAM_DATA_SIG on Sun parts. [SPARC64]: First cut at VIS simulator for Niagara. [SPARC64]: Fix system type in /proc/cpuinfo and remove bogus OBP check. [SPARC64]: Add SMT scheduling support for Niagara. [SPARC64]: Fix 32-bit truncation which broke sparsemem. [SPARC64]: Move over to sparsemem. [SPARC64]: Fix new context version SMP handling. ...
| * [SPARC64]: Update defconfig.David S. Miller2006-03-201-11/+14
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix 2 bugs in huge page support.David S. Miller2006-03-202-4/+176
| | | | | | | | | | | | | | | | | | | | 1) huge_pte_offset() did not check the page table hierarchy elements as being empty correctly, resulting in an OOPS 2) Need platform specific hugetlb_get_unmapped_area() to handle the top-down vs. bottom-up address space allocation strategies. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: CONFIG_BLK_DEV_RAM fixAndrew Morton2006-03-201-1/+1
| | | | | | | | | | | | | | init/do_mounts_rd.c depends upon CONFIG_BLK_DEV_RAM, not CONFIG_BLK_DEV_INITRD. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Optimized TSB table initialization.David S. Miller2006-03-204-1/+72
| | | | | | | | | | | | | | | | | | | | | | | | | | | | We only need to write an invalid tag every 16 bytes, so taking advantage of this can save many instructions compared to the simple memset() call we make now. A prefetching implementation is implemented for sun4u and a block-init store version if implemented for Niagara. The next trick is to be able to perform an init and a copy_tsb() in parallel when growing a TSB table. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Allow CONFIG_MEMORY_HOTPLUG to build.David S. Miller2006-03-201-0/+18
| | | | | | | | | | | | | | | | | | | | online_page() is straightforward, and then add a dummy remove_memory() that returns -EINVAL just like i386. There is no point in implementing remove_memory() since __remove_pages() has no implementation either. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Use SLAB caches for TSB tables.David S. Miller2006-03-203-25/+69
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Don't kill the page allocator when growing a TSB.David S. Miller2006-03-201-8/+35
| | | | | | | | | | | | | | | | | | | | | | | | Try only lightly on > 1 order allocations. If a grow fails, we are under memory pressure, so do not try to grow the TSB for this address space any more. If a > 0 order TSB allocation fails on a new fork, retry using a 0 order allocation. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Randomize mm->mmap_base when PF_RANDOMIZE is set.David S. Miller2006-03-201-2/+14
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Increase top of 32-bit process stack.David S. Miller2006-03-205-15/+21
| | | | | | | | | | | | | | Put it one page below the top of the 32-bit address space. This gives us ~16MB more address space to work with. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Top-down address space allocation for 32-bit tasks.David S. Miller2006-03-204-10/+189
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently allocations are very constrained for 32-bit processes. It grows down-up from 0x70000000 to 0xf0000000 which gives about 2GB of stack + dynamic mmap() space. So support the top-down method, and we need to override the generic helper function in order to deal with D-cache coloring. With these changes I was able to squeeze out a mmap() just over 3.6GB in size in a 32-bit process. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64] bbc_i2c: Fix cpu check and add missing module license.David S. Miller2006-03-201-1/+3
| | | | | | | | | | | | | | Should allow cheetah_plus cpu types and don't taint the kernel. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix and re-enable dynamic TSB sizing.David S. Miller2006-03-205-118/+203
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is good for up to %50 performance improvement of some test cases. The problem has been the race conditions, and hopefully I've plugged them all up here. 1) There was a serious race in switch_mm() wrt. lazy TLB switching to and from kernel threads. We could erroneously skip a tsb_context_switch() and thus use a stale TSB across a TSB grow event. There is a big comment now in that function describing exactly how it can happen. 2) All code paths that do something with the TSB need to be guarded with the mm->context.lock spinlock. This makes page table flushing paths properly synchronize with both TSB growing and TLB context changes. 3) TSB growing events are moved to the end of successful fault processing. Previously it was in update_mmu_cache() but that is deadlock prone. At the end of do_sparc64_fault() we hold no spinlocks that could deadlock the TSB grow sequence. We also have dropped the address space semaphore. While we're here, add prefetching to the copy_tsb() routine and put it in assembler into the tsb.S file. This piece of code is quite time critical. There are some small negative side effects to this code which can be improved upon. In particular we grab the mm->context.lock even for the tsb insert done by update_mmu_cache() now and that's a bit excessive. We can get rid of that locking, and the same lock taking in flush_tsb_user(), by disabling PSTATE_IE around the whole operation including the capturing of the tsb pointer and tsb_nentries value. That would work because anyone growing the TSB won't free up the old TSB until all cpus respond to the TSB change cross call. I'm not quite so confident in that optimization to put it in right now, but eventually we might be able to and the description is here for reference. This code seems very solid now. It passes several parallel GCC bootstrap builds, and our favorite "nut cruncher" stress test which is a full "make -j8192" build of a "make allmodconfig" kernel. That puts about 256 processes on each cpu's run queue, makes lots of process cpu migrations occur, causes lots of page table and TLB flushing activity, incurs many context version number changes, and it swaps the machine real far out to disk even though there is 16GB of ram on this test system. :-) Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SUNSU]: Fix missing spinlock initialization.David S. Miller2006-03-201-0/+2
| | | | | | | | | | | | Caught by CONFIG_DEBUG_SPINLOCK. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [TG3]: Do not try to access NIC_SRAM_DATA_SIG on Sun parts.David S. Miller2006-03-201-0/+4
| | | | | | | | | | | | | | Sun does't put an SEEPROM behind the tigon3 chip, among other things, so accesses to these areas just give bus timeouts. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: First cut at VIS simulator for Niagara.David S. Miller2006-03-203-1/+901
| | | | | | | | | | | | | | Niagara does not implement some of the VIS instructions in hardware, so we have to emulate them. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix system type in /proc/cpuinfo and remove bogus OBP check.David S. Miller2006-03-204-90/+12
| | | | | | | | | | | | | | | | | | | | Report 'sun4v' when appropriate in /proc/cpuinfo Remove all the verifications of the OBP version string. Just make sure it's there, and report it raw in the bootup logs and via /proc/cpuinfo. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Add SMT scheduling support for Niagara.David S. Miller2006-03-203-0/+29
| | | | | | | | | | | | | | | | | | | | | | | | The mapping is a simple "(cpuid >> 2) == core" for now. Later we'll add more sophisticated code that will walk the sun4v machine description and figure this out from there. We should also add core mappings for jaguar and panther processors. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix 32-bit truncation which broke sparsemem.David S. Miller2006-03-201-10/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The page->flags manipulations done by the D-cache dirty state tracking was broken because the constants were not marked with "UL" to make them 64-bit, which means we were clobbering the upper 32-bits of page->flags all the time. This doesn't jive well with sparsemem which stores the section and indexing information in the top 32-bits of page->flags. This is yet another sparc64 bug which has been with us forever. While we're here, tidy up some things in bootmem_init() and paginig_init(): 1) Pass min_low_pfn to init_bootmem_node(), it's identical to (phys_base >> PAGE_SHIFT) but we should use consistent with the variable names we print in CONFIG_BOOTMEM_DEBUG 2) max_mapnr, although no longer used, was being set inaccurately, we shouldn't subtract pfn_base any more. 3) All the games with phys_base in the zones_*[] arrays we pass to free_area_init_node() are no longer necessary. Thanks to Josh Grebe and Fabbione for the bug reports and testing. Fix also verified locally on an SB2500 which had a memory layout that triggered the same problem. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Move over to sparsemem.David S. Miller2006-03-207-54/+123
| | | | | | | | | | | | | | | | This has been pending for a long time, and the fact that we waste a ton of ram on some configurations kind of pushed things over the edge. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix new context version SMP handling.David S. Miller2006-03-2010-46/+63
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't piggy back the SMP receive signal code to do the context version change handling. Instead allocate another fixed PIL number for this asynchronous cross-call. We can't use smp_call_function() because this thing is invoked with interrupts disabled and a few spinlocks held. Also, fix smp_call_function_mask() to count "cpus" correctly. There is no guarentee that the local cpu is in the mask yet that is exactly what this code was assuming. Signed-off-by: David S. Miller <davem@davemloft.net>
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