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* Hide tunable definitions behind _KERNELMitchell Horne2020-09-211-0/+4
| | | | | | | | | | | | | | | Some userspace code include sys/kernel.h. Namely, some OpenZFS tests do this, and it was causing breakage after r365945 due to a lack of bool typedef. Userspace should not need the TUNABLE_** stuff, so hide it behind an #ifdef _KERNEL. Sorry for the breakage. Reported by: andrew, Michael Butler, Jenkins Discussed with: kevans, allanjude Notes: svn path=/head/; revision=365955
* Add getenv(9) boolean parsing functionsMitchell Horne2020-09-211-0/+19
| | | | | | | | | | | | | | | | | | | | This adds the getenv_bool() function, to parse a boolean value from a kernel environment variable or tunable. This works for traditional boolean values like "0" and "1", and also "true" and "false" (case-insensitive). These semantics do not yet apply to sysctls declared using SYSCTL_BOOL with CTLFLAG_TUN (they still only parse 1 and 0). Also added are two wrapper functions, getenv_is_true() and getenv_is_false(). These are slightly simpler for callers wishing to perform a single check of a configuration variable. Reviewed by: jhb (slightly earlier version) Sponsored by: NetApp, Inc. Sponsored by: Klara, Inc. Differential Revision: https://reviews.freebsd.org/D26270 Notes: svn path=/head/; revision=365945
* sys: clean up empty lines in .c and .h filesMateusz Guzik2020-09-011-2/+0
| | | | Notes: svn path=/head/; revision=365223
* Add COUNTER_U64_SYSINIT() and COUNTER_U64_DEFINE_EARLY().Mark Johnston2020-03-061-1/+2
| | | | | | | | | | | | | | The aim is to reduce the boilerplate needed today to define and initialize global counters. Also add SI_SUB_COUNTER to the sysinit ordering. Reviewed by: kib MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D23977 Notes: svn path=/head/; revision=358715
* Define more subsystem orders.Hans Petter Selasky2020-03-061-0/+4
| | | | | | | | | | Intended for use with module_init_order() in the LinuxKPI. MFC after: 1 week Sponsored by: Mellanox Technologies Notes: svn path=/head/; revision=358695
* Add explicit SI_SUB_EPOCHConrad Meyer2019-11-221-0/+1
| | | | | | | | | | | | | | | | Add explicit SI_SUB_EPOCH, after SI_SUB_TASKQ and before SI_SUB_SMP (EARLY_AP_STARTUP). Rename existing "SI_SUB_TASKQ + 1" to SI_SUB_EPOCH. epoch(9) consumers cannot epoch_alloc() before SI_SUB_EPOCH:SI_ORDER_SECOND, but likely should allocate before SI_SUB_SMP. Prior to this change, consumers (well, epoch itself, and net/if.c) just open-coded the SI_SUB_TASKQ + 1 order to match epoch.c, but this was fragile. Reviewed by: mmacy Differential Revision: https://reviews.freebsd.org/D22503 Notes: svn path=/head/; revision=355024
* Move sysinit and sysuninit linker sets in the data (writeable) section.Konstantin Belousov2018-03-211-3/+3
| | | | | | | | | | | | | | Both sets are sorted in place, and with the introduction of read-only permissions on the amd64 kernel text, the sorting override depended on CR0.WP turned off. Make it correct by moving the sets into writeable part of the KVA, also fixing boot on machines where hand-off from BIOS to OS occurs with CR0.WP set. Based on submission by: Peter Lei <peter.lei@ieee.org> MFC after: 1 week Notes: svn path=/head/; revision=331290
* Use the TSLOG framework to record SYSINIT entry/exit timestamps.Colin Percival2017-12-311-0/+33
| | | | Notes: svn path=/head/; revision=327427
* spdx: initial adoption of licensing ID tags.Pedro F. Giffuni2017-11-181-0/+2
| | | | | | | | | | | | | | | | | | | | 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. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point. Initially, only tag files that use BSD 4-Clause "Original" license. RelNotes: yes Differential Revision: https://reviews.freebsd.org/D13133 Notes: svn path=/head/; revision=325966
* Add SI_SUB_TASKQ after SI_SUB_INTR and move taskqueue initialization there ↵Conrad Meyer2017-08-161-0/+1
| | | | | | | | | | | | | | for EARLY_AP_STARTUP This fixes a regression accidentally introduced in r322588, due to an interaction with EARLY_AP_STARTUP. Reviewed by: bdrewery@, jhb@ Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D12053 Notes: svn path=/head/; revision=322596
* Add config_intrhook_oneshot(): schedule an intrhook function and unregisterIan Lepore2017-08-131-2/+5
| | | | | | | | | | | | | | | | | | | | it automatically after it runs. The config_intrhook mechanism allows a driver to stall the boot process until device(s) required for booting are available, by not allowing system inits to proceed until all intrhook functions have been unregistered. Virtually all existing code simply unregisters from within the hook function when it gets called. This new function makes that common usage more convenient. Instead of allocating and filling in a struct, passing it to a function that might (in theory) fail, and checking the return code, now a driver can simply call this cannot-fail routine, passing just the intrhook function and its arg. Differential Revision: https://reviews.freebsd.org/D11963 Notes: svn path=/head/; revision=322465
* Fix TUNABLE_UINT64() on 32bit architectures.Konstantin Belousov2017-03-271-1/+1
| | | | | | | | | | The macro is not used in the tree. Sponsored by: The FreeBSD Foundation MFC after: 1 week Notes: svn path=/head/; revision=316009
* The pr_destroy field does not allow us to run the teardown code in aBjoern A. Zeeb2016-06-011-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | specific order. VNET_SYSUNINITs however are doing exactly that. Thus remove the VIMAGE conditional field from the domain(9) protosw structure and replace it with VNET_SYSUNINITs. This also allows us to change some order and to make the teardown functions file local static. Also convert divert(4) as it uses the same mechanism ip(4) and ip6(4) use internally. Slightly reshuffle the SI_SUB_* fields in kernel.h and add a new ones, e.g., for pfil consumers (firewalls), partially for this commit and for others to come. Reviewed by: gnn, tuexen (sctp), jhb (kernel.h) Obtained from: projects/vnet MFC after: 2 weeks X-MFC: do not remove pr_destroy Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D6652 Notes: svn path=/head/; revision=301114
* Add an EARLY_AP_STARTUP option to start APs earlier during boot.John Baldwin2016-05-141-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, Application Processors (non-boot CPUs) are started by MD code at SI_SUB_CPU, but they are kept waiting in a "pen" until SI_SUB_SMP at which point they are released to run kernel threads. SI_SUB_SMP is one of the last SYSINIT levels, so APs don't enter the scheduler and start running threads until fairly late in the boot. This change moves SI_SUB_SMP up to just before software interrupt threads are created allowing the APs to start executing kernel threads much sooner (before any devices are probed). This allows several initialization routines that need to perform initialization on all CPUs to now perform that initialization in one step rather than having to defer the AP initialization to a second SYSINIT run at SI_SUB_SMP. It also permits all CPUs to be available for handling interrupts before any devices are probed. This last feature fixes a problem on with interrupt vector exhaustion. Specifically, in the old model all device interrupts were routed onto the boot CPU during boot. Later after the APs were released at SI_SUB_SMP, interrupts were redistributed across all CPUs. However, several drivers for multiqueue hardware allocate N interrupts per CPU in the system. In a system with many CPUs, just a few drivers doing this could exhaust the available pool of interrupt vectors on the boot CPU as each driver was allocating N * mp_ncpu vectors on the boot CPU. Now, drivers will allocate interrupts on their desired CPUs during boot meaning that only N interrupts are allocated from the boot CPU instead of N * mp_ncpu. Some other bits of code can also be simplified as smp_started is now true much earlier and will now always be true for these bits of code. This removes the need to treat the single-CPU boot environment as a special case. As a transition aid, the new behavior is available under a new kernel option (EARLY_AP_STARTUP). This will allow the option to be turned off if need be during initial testing. I plan to enable this on x86 by default in a followup commit in the next few days and to have all platforms moved over before 11.0. Once the transition is complete, the option will be removed along with the !EARLY_AP_STARTUP code. These changes have only been tested on x86. Other platform maintainers are encouraged to port their architectures over as well. The main things to check for are any uses of smp_started in MD code that can be simplified and SI_SUB_SMP SYSINITs in MD code that can be removed in the EARLY_AP_STARTUP case (e.g. the interrupt shuffling). PR: kern/199321 Reviewed by: markj, gnn, kib Sponsored by: Netflix Notes: svn path=/head/; revision=299746
* Create wrappers for uint64_t and int64_t for the tunables. While notWarner Losh2016-04-151-0/+38
| | | | | | | strictly necessary, it is more convenient. Notes: svn path=/head/; revision=298025
* Remove comment obsoleted by r289056.Edward Tomasz Napierala2015-10-081-4/+0
| | | | | | | | MFC after: 1 month Sponsored by: The FreeBSD Foundation Notes: svn path=/head/; revision=289057
* Remove unused SI_SUB_* #defines.Edward Tomasz Napierala2015-10-081-7/+0
| | | | | | | | | | Reviewed by: kib@ MFC after: 1 month Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D3708 Notes: svn path=/head/; revision=289056
* Huge cleanup of random(4) code.Mark Murray2015-06-301-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * GENERAL - Update copyright. - Make kernel options for RANDOM_YARROW and RANDOM_DUMMY. Set neither to ON, which means we want Fortuna - If there is no 'device random' in the kernel, there will be NO random(4) device in the kernel, and the KERN_ARND sysctl will return nothing. With RANDOM_DUMMY there will be a random(4) that always blocks. - Repair kern.arandom (KERN_ARND sysctl). The old version went through arc4random(9) and was a bit weird. - Adjust arc4random stirring a bit - the existing code looks a little suspect. - Fix the nasty pre- and post-read overloading by providing explictit functions to do these tasks. - Redo read_random(9) so as to duplicate random(4)'s read internals. This makes it a first-class citizen rather than a hack. - Move stuff out of locked regions when it does not need to be there. - Trim RANDOM_DEBUG printfs. Some are excess to requirement, some behind boot verbose. - Use SYSINIT to sequence the startup. - Fix init/deinit sysctl stuff. - Make relevant sysctls also tunables. - Add different harvesting "styles" to allow for different requirements (direct, queue, fast). - Add harvesting of FFS atime events. This needs to be checked for weighing down the FS code. - Add harvesting of slab allocator events. This needs to be checked for weighing down the allocator code. - Fix the random(9) manpage. - Loadable modules are not present for now. These will be re-engineered when the dust settles. - Use macros for locks. - Fix comments. * src/share/man/... - Update the man pages. * src/etc/... - The startup/shutdown work is done in D2924. * src/UPDATING - Add UPDATING announcement. * src/sys/dev/random/build.sh - Add copyright. - Add libz for unit tests. * src/sys/dev/random/dummy.c - Remove; no longer needed. Functionality incorporated into randomdev.*. * live_entropy_sources.c live_entropy_sources.h - Remove; content moved. - move content to randomdev.[ch] and optimise. * src/sys/dev/random/random_adaptors.c src/sys/dev/random/random_adaptors.h - Remove; plugability is no longer used. Compile-time algorithm selection is the way to go. * src/sys/dev/random/random_harvestq.c src/sys/dev/random/random_harvestq.h - Add early (re)boot-time randomness caching. * src/sys/dev/random/randomdev_soft.c src/sys/dev/random/randomdev_soft.h - Remove; no longer needed. * src/sys/dev/random/uint128.h - Provide a fake uint128_t; if a real one ever arrived, we can use that instead. All that is needed here is N=0, N++, N==0, and some localised trickery is used to manufacture a 128-bit 0ULLL. * src/sys/dev/random/unit_test.c src/sys/dev/random/unit_test.h - Improve unit tests; previously the testing human needed clairvoyance; now the test will do a basic check of compressibility. Clairvoyant talent is still a good idea. - This is still a long way off a proper unit test. * src/sys/dev/random/fortuna.c src/sys/dev/random/fortuna.h - Improve messy union to just uint128_t. - Remove unneeded 'static struct fortuna_start_cache'. - Tighten up up arithmetic. - Provide a method to allow eternal junk to be introduced; harden it against blatant by compress/hashing. - Assert that locks are held correctly. - Fix the nasty pre- and post-read overloading by providing explictit functions to do these tasks. - Turn into self-sufficient module (no longer requires randomdev_soft.[ch]) * src/sys/dev/random/yarrow.c src/sys/dev/random/yarrow.h - Improve messy union to just uint128_t. - Remove unneeded 'staic struct start_cache'. - Tighten up up arithmetic. - Provide a method to allow eternal junk to be introduced; harden it against blatant by compress/hashing. - Assert that locks are held correctly. - Fix the nasty pre- and post-read overloading by providing explictit functions to do these tasks. - Turn into self-sufficient module (no longer requires randomdev_soft.[ch]) - Fix some magic numbers elsewhere used as FAST and SLOW. Differential Revision: https://reviews.freebsd.org/D2025 Reviewed by: vsevolod,delphij,rwatson,trasz,jmg Approved by: so (delphij) Notes: svn path=/head/; revision=284959
* Spell raccdt in a more conventional way in a comment.Robert Watson2014-05-061-1/+1
| | | | | | | MFC after: 3 days Notes: svn path=/head/; revision=265432
* Garbage collect two more unused sysinit subsystems: SI_SUB_KVM_RSRC andRobert Watson2014-05-051-2/+0
| | | | | | | | | SI_SUB_CLISTS. MFC after: 3 days Notes: svn path=/head/; revision=265396
* Garbage collect mtxpool_lockbuilder, the mutex pool historically usedRobert Watson2014-05-021-1/+0
| | | | | | | | | | | | | for lockmgr and sx interlocks, but unused since optimised versions of those sleep locks were introduced. This will save a (quite) small amount of memory in all kernel configurations. The sleep mutex pool is retained as it is used for 'struct bio' and several other consumers. Discussed with: jhb MFC after: 3 days Notes: svn path=/head/; revision=265216
* Implement vector callback for PVHVM and unify event channel implementationsJustin T. Gibbs2013-08-291-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Re-structure Xen HVM support so that: - Xen is detected and hypercalls can be performed very early in system startup. - Xen interrupt services are implemented using FreeBSD's native interrupt delivery infrastructure. - the Xen interrupt service implementation is shared between PV and HVM guests. - Xen interrupt handlers can optionally use a filter handler in order to avoid the overhead of dispatch to an interrupt thread. - interrupt load can be distributed among all available CPUs. - the overhead of accessing the emulated local and I/O apics on HVM is removed for event channel port events. - a similar optimization can eventually, and fairly easily, be used to optimize MSI. Early Xen detection, HVM refactoring, PVHVM interrupt infrastructure, and misc Xen cleanups: Sponsored by: Spectra Logic Corporation Unification of PV & HVM interrupt infrastructure, bug fixes, and misc Xen cleanups: Submitted by: Roger Pau Monné Sponsored by: Citrix Systems R&D sys/x86/x86/local_apic.c: sys/amd64/include/apicvar.h: sys/i386/include/apicvar.h: sys/amd64/amd64/apic_vector.S: sys/i386/i386/apic_vector.s: sys/amd64/amd64/machdep.c: sys/i386/i386/machdep.c: sys/i386/xen/exception.s: sys/x86/include/segments.h: Reserve IDT vector 0x93 for the Xen event channel upcall interrupt handler. On Hypervisors that support the direct vector callback feature, we can request that this vector be called directly by an injected HVM interrupt event, instead of a simulated PCI interrupt on the Xen platform PCI device. This avoids all of the overhead of dealing with the emulated I/O APIC and local APIC. It also means that the Hypervisor can inject these events on any CPU, allowing upcalls for different ports to be handled in parallel. sys/amd64/amd64/mp_machdep.c: sys/i386/i386/mp_machdep.c: Map Xen per-vcpu area during AP startup. sys/amd64/include/intr_machdep.h: sys/i386/include/intr_machdep.h: Increase the FreeBSD IRQ vector table to include space for event channel interrupt sources. sys/amd64/include/pcpu.h: sys/i386/include/pcpu.h: Remove Xen HVM per-cpu variable data. These fields are now allocated via the dynamic per-cpu scheme. See xen_intr.c for details. sys/amd64/include/xen/hypercall.h: sys/dev/xen/blkback/blkback.c: sys/i386/include/xen/xenvar.h: sys/i386/xen/clock.c: sys/i386/xen/xen_machdep.c: sys/xen/gnttab.c: Prefer FreeBSD primatives to Linux ones in Xen support code. sys/amd64/include/xen/xen-os.h: sys/i386/include/xen/xen-os.h: sys/xen/xen-os.h: sys/dev/xen/balloon/balloon.c: sys/dev/xen/blkback/blkback.c: sys/dev/xen/blkfront/blkfront.c: sys/dev/xen/console/xencons_ring.c: sys/dev/xen/control/control.c: sys/dev/xen/netback/netback.c: sys/dev/xen/netfront/netfront.c: sys/dev/xen/xenpci/xenpci.c: sys/i386/i386/machdep.c: sys/i386/include/pmap.h: sys/i386/include/xen/xenfunc.h: sys/i386/isa/npx.c: sys/i386/xen/clock.c: sys/i386/xen/mp_machdep.c: sys/i386/xen/mptable.c: sys/i386/xen/xen_clock_util.c: sys/i386/xen/xen_machdep.c: sys/i386/xen/xen_rtc.c: sys/xen/evtchn/evtchn_dev.c: sys/xen/features.c: sys/xen/gnttab.c: sys/xen/gnttab.h: sys/xen/hvm.h: sys/xen/xenbus/xenbus.c: sys/xen/xenbus/xenbus_if.m: sys/xen/xenbus/xenbusb_front.c: sys/xen/xenbus/xenbusvar.h: sys/xen/xenstore/xenstore.c: sys/xen/xenstore/xenstore_dev.c: sys/xen/xenstore/xenstorevar.h: Pull common Xen OS support functions/settings into xen/xen-os.h. sys/amd64/include/xen/xen-os.h: sys/i386/include/xen/xen-os.h: sys/xen/xen-os.h: Remove constants, macros, and functions unused in FreeBSD's Xen support. sys/xen/xen-os.h: sys/i386/xen/xen_machdep.c: sys/x86/xen/hvm.c: Introduce new functions xen_domain(), xen_pv_domain(), and xen_hvm_domain(). These are used in favor of #ifdefs so that FreeBSD can dynamically detect and adapt to the presence of a hypervisor. The goal is to have an HVM optimized GENERIC, but more is necessary before this is possible. sys/amd64/amd64/machdep.c: sys/dev/xen/xenpci/xenpcivar.h: sys/dev/xen/xenpci/xenpci.c: sys/x86/xen/hvm.c: sys/sys/kernel.h: Refactor magic ioport, Hypercall table and Hypervisor shared information page setup, and move it to a dedicated HVM support module. HVM mode initialization is now triggered during the SI_SUB_HYPERVISOR phase of system startup. This currently occurs just after the kernel VM is fully setup which is just enough infrastructure to allow the hypercall table and shared info page to be properly mapped. sys/xen/hvm.h: sys/x86/xen/hvm.c: Add definitions and a method for configuring Hypervisor event delievery via a direct vector callback. sys/amd64/include/xen/xen-os.h: sys/x86/xen/hvm.c: sys/conf/files: sys/conf/files.amd64: sys/conf/files.i386: Adjust kernel build to reflect the refactoring of early Xen startup code and Xen interrupt services. sys/dev/xen/blkback/blkback.c: sys/dev/xen/blkfront/blkfront.c: sys/dev/xen/blkfront/block.h: sys/dev/xen/control/control.c: sys/dev/xen/evtchn/evtchn_dev.c: sys/dev/xen/netback/netback.c: sys/dev/xen/netfront/netfront.c: sys/xen/xenstore/xenstore.c: sys/xen/evtchn/evtchn_dev.c: sys/dev/xen/console/console.c: sys/dev/xen/console/xencons_ring.c Adjust drivers to use new xen_intr_*() API. sys/dev/xen/blkback/blkback.c: Since blkback defers all event handling to a taskqueue, convert this task queue to a "fast" taskqueue, and schedule it via an interrupt filter. This avoids an unnecessary ithread context switch. sys/xen/xenstore/xenstore.c: The xenstore driver is MPSAFE. Indicate as much when registering its interrupt handler. sys/xen/xenbus/xenbus.c: sys/xen/xenbus/xenbusvar.h: Remove unused event channel APIs. sys/xen/evtchn.h: Remove all kernel Xen interrupt service API definitions from this file. It is now only used for structure and ioctl definitions related to the event channel userland device driver. Update the definitions in this file to match those from NetBSD. Implementing this interface will be necessary for Dom0 support. sys/xen/evtchn/evtchnvar.h: Add a header file for implemenation internal APIs related to managing event channels event delivery. This is used to allow, for example, the event channel userland device driver to access low-level routines that typical kernel consumers of event channel services should never access. sys/xen/interface/event_channel.h: sys/xen/xen_intr.h: Standardize on the evtchn_port_t type for referring to an event channel port id. In order to prevent low-level event channel APIs from leaking to kernel consumers who should not have access to this data, the type is defined twice: Once in the Xen provided event_channel.h, and again in xen/xen_intr.h. The double declaration is protected by __XEN_EVTCHN_PORT_DEFINED__ to ensure it is never declared twice within a given compilation unit. sys/xen/xen_intr.h: sys/xen/evtchn/evtchn.c: sys/x86/xen/xen_intr.c: sys/dev/xen/xenpci/evtchn.c: sys/dev/xen/xenpci/xenpcivar.h: New implementation of Xen interrupt services. This is similar in many respects to the i386 PV implementation with the exception that events for bound to event channel ports (i.e. not IPI, virtual IRQ, or physical IRQ) are further optimized to avoid mask/unmask operations that aren't necessary for these edge triggered events. Stubs exist for supporting physical IRQ binding, but will need additional work before this implementation can be fully shared between PV and HVM. sys/amd64/amd64/mp_machdep.c: sys/i386/i386/mp_machdep.c: sys/i386/xen/mp_machdep.c sys/x86/xen/hvm.c: Add support for placing vcpu_info into an arbritary memory page instead of using HYPERVISOR_shared_info->vcpu_info. This allows the creation of domains with more than 32 vcpus. sys/i386/i386/machdep.c: sys/i386/xen/clock.c: sys/i386/xen/xen_machdep.c: sys/i386/xen/exception.s: Add support for new event channle implementation. Notes: svn path=/head/; revision=255040
* rename scheduler->swapper and SI_SUB_RUN_SCHEDULER->SI_SUB_LASTAndriy Gapon2013-07-241-2/+2
| | | | | | | | | | | | | | | | | | | Also directly call swapper() at the end of mi_startup instead of relying on swapper being the last thing in sysinits order. Rationale: - "RUN_SCHEDULER" was misleading, scheduling already takes place at that stage - "scheduler" was misleading, the function swaps in the swapped out processes - another SYSINIT(SI_SUB_RUN_SCHEDULER, SI_ORDER_ANY) could never be invoked depending on its relative order with scheduler; this was not obvious and the bug actually used to exist Reviewed by: kib (ealier version) MFC after: 14 days Notes: svn path=/head/; revision=253604
* Mark 'ticks', 'time_second', and 'time_uptime' as volatile to prevent theJohn Baldwin2013-01-281-1/+1
| | | | | | | | | | compiler from caching their values in tight loops. Reviewed by: bde MFC after: 1 week Notes: svn path=/head/; revision=246037
* Remove splimp() comment from sysinit table and attribute SI_SUB_PROTO_BEGINAndre Oppermann2012-10-191-8/+2
| | | | | | | | | and SI_SUB_PROTO_END to VNET related initializations. MFC after: 3 days Notes: svn path=/head/; revision=241724
* Replace a reference to the non-existent SI_ORDER_LAST in a comment withJohn Baldwin2012-06-121-1/+1
| | | | | | | | | SI_ORDER_ANY. Submitted by: Brandon Gooch brandongooch yahoo com Notes: svn path=/head/; revision=236968
* Add racct. It's an API to keep per-process, per-jail, per-loginclassEdward Tomasz Napierala2011-03-291-0/+2
| | | | | | | | | | | | and per-loginclass resource accounting information, to be used by the new resource limits code. It's connected to the build, but the code that actually calls the new functions will come later. Sponsored by: The FreeBSD Foundation Reviewed by: kib (earlier version) Notes: svn path=/head/; revision=220137
* Mostly revert r219468, as I had misremembered the C standard regardingMatthew D Fleming2011-03-111-1/+1
| | | | | | | | | the size of an extern array. Keep one change from strncpy to strlcpy. Notes: svn path=/head/; revision=219523
* Use MAXPATHLEN rather than the size of an extern array when copying theMatthew D Fleming2011-03-101-1/+1
| | | | | | | | | kernel name. Also consistenly use strlcpy(). Suggested by: Warner Losh Notes: svn path=/head/; revision=219468
* Remove unexisted since r212541 timer1hz/timer2hz variables.Alexander Motin2010-11-101-2/+0
| | | | Notes: svn path=/head/; revision=215090
* - Implement MI helper functions, dividing one or two timer interrupts withAlexander Motin2010-05-241-0/+2
| | | | | | | | | | | arbitrary frequencies into hardclock(), statclock() and profclock() calls. Same code with minor variations duplicated several times over the tree for different timer drivers and architectures. - Switch all x86 archs to new functions, simplifying the code and removing extra logic from timer drivers. Other archs are also welcome. Notes: svn path=/head/; revision=208494
* Random number generator initialization cleanup:Ruslan Ermilov2009-10-201-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | - Introduce new SI_SUB_RANDOM point in boot sequence to make it clear from where one may start using random(9). It should be as early as possible, so place it just after SI_SUB_CPU where we have some randomness on most platforms via get_cyclecount(). - Move stack protector initialization to be after SI_SUB_RANDOM as before this point we have no randomness at all. This fixes stack protector to actually protect stack with some random guard value instead of a well-known one. Note that this patch doesn't try to address arc4random(9) issues. With current code, it will be implicitly seeded by stack protector and hence will get the same entropy as random(9). It will be securely reseeded once /dev/random is feeded by some entropy from userland. Submitted by: Maxim Dounin <mdounin@mdounin.ru> MFC after: 3 days Notes: svn path=/head/; revision=198295
* Introduce and use a sysinit-based initialization scheme for virtualRobert Watson2009-07-231-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | network stacks, VNET_SYSINIT: - Add VNET_SYSINIT and VNET_SYSUNINIT macros to declare events that will occur each time a network stack is instantiated and destroyed. In the !VIMAGE case, these are simply mapped into regular SYSINIT/SYSUNINIT. For the VIMAGE case, we instead use SYSINIT's to track their order and properties on registration, using them for each vnet when created/ destroyed, or immediately on module load for already-started vnets. - Remove vnet_modinfo mechanism that existed to serve this purpose previously, as well as its dependency scheme: we now just use the SYSINIT ordering scheme. - Implement VNET_DOMAIN_SET() to allow protocol domains to declare that they want init functions to be called for each virtual network stack rather than just once at boot, compiling down to DOMAIN_SET() in the non-VIMAGE case. - Walk all virtualized kernel subsystems and make use of these instead of modinfo or DOMAIN_SET() for init/uninit events. In some cases, convert modular components from using modevent to using sysinit (where appropriate). In some cases, do minor rejuggling of SYSINIT ordering to make room for or better manage events. Portions submitted by: jhb (VNET_SYSINIT), bz (cleanup) Discussed with: jhb, bz, julian, zec Reviewed by: bz Approved by: re (VIMAGE blanket) Notes: svn path=/head/; revision=195837
* Reimplement and/or implement vnet list locking by replacing a mostlyRobert Watson2009-07-191-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | unused custom mutex/condvar-based sleep locks with two locks: an rwlock (for non-sleeping use) and sxlock (for sleeping use). Either acquired for read is sufficient to stabilize the vnet list, but both must be acquired for write to modify the list. Replace previous no-op read locking macros, used in various places in the stack, with actual locking to prevent race conditions. Callers must declare when they may perform unbounded sleeps or not when selecting how to lock. Refactor vnet sysinits so that the vnet list and locks are initialized before kernel modules are linked, as the kernel linker will use them for modules loaded by the boot loader. Update various consumers of these KPIs based on whether they may sleep or not. Reviewed by: bz Approved by: re (kib) Notes: svn path=/head/; revision=195760
* Place hostnames and similar information fully under the prison system.Jamie Gritton2009-05-291-7/+0
| | | | | | | | | | | | | | | | | | | | The system hostname is now stored in prison0, and the global variable "hostname" has been removed, as has the hostname_mtx mutex. Jails may have their own host information, or they may inherit it from the parent/system. The proper way to read the hostname is via getcredhostname(), which will copy either the hostname associated with the passed cred, or the system hostname if you pass NULL. The system hostname can still be accessed directly (and without locking) at prison0.pr_host, but that should be avoided where possible. The "similar information" referred to is domainname, hostid, and hostuuid, which have also become prison parameters and had their associated global variables removed. Approved by: bz (mentor) Notes: svn path=/head/; revision=193066
* Introduce a new virtualization container, provisionally named vprocg, to holdMarko Zec2009-05-081-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | virtualized instances of hostname and domainname, as well as a new top-level virtualization struct vimage, which holds pointers to struct vnet and struct vprocg. Struct vprocg is likely to become replaced in the near future with a new jail management API import. As a consequence of this change, change struct ucred to point to a struct vimage, instead of directly pointing to a vnet. Merge vnet / vimage / ucred refcounting infrastructure from p4 / vimage branch. Permit kldload / kldunload operations to be executed only from the default vimage context. This change should have no functional impact on nooptions VIMAGE kernel builds. Reviewed by: bz Approved by: julian (mentor) Notes: svn path=/head/; revision=191915
* Introduce vnet module registration / initialization framework withMarko Zec2009-04-111-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | dependency tracking and ordering enforcement. With this change, per-vnet initialization functions introduced with r190787 are no longer directly called from traditional initialization functions (which cc in most cases inlined to pre-r190787 code), but are instead registered via the vnet framework first, and are invoked only after all prerequisite modules have been initialized. In the long run, this framework should allow us to both initialize and dismantle multiple vnet instances in a correct order. The problem this change aims to solve is how to replay the initialization sequence of various network stack components, which have been traditionally triggered via different mechanisms (SYSINIT, protosw). Note that this initialization sequence was and still can be subtly different depending on whether certain pieces of code have been statically compiled into the kernel, loaded as modules by boot loader, or kldloaded at run time. The approach is simple - we record the initialization sequence established by the traditional mechanisms whenever vnet_mod_register() is called for a particular vnet module. The vnet_mod_register_multi() variant allows a single initializer function to be registered multiple times but with different arguments - currently this is only used in kern/uipc_domain.c by net_add_domain() with different struct domain * as arguments, which allows for protosw-registered initialization routines to be invoked in a correct order by the new vnet initialization framework. For the purpose of identifying vnet modules, each vnet module has to have a unique ID, which is statically assigned in sys/vimage.h. Dynamic assignment of vnet module IDs is not supported yet. A vnet module may specify a single prerequisite module at registration time by filling in the vmi_dependson field of its vnet_modinfo struct with the ID of the module it depends on. Unless specified otherwise, all vnet modules depend on VNET_MOD_NET (container for ifnet list head, rt_tables etc.), which thus has to and will always be initialized first. The framework will panic if it detects any unresolved dependencies before completing system initialization. Detection of unresolved dependencies for vnet modules registered after boot (kldloaded modules) is not provided. Note that the fact that each module can specify only a single prerequisite may become problematic in the long run. In particular, INET6 depends on INET being already instantiated, due to TCP / UDP structures residing in INET container. IPSEC also depends on INET, which will in turn additionally complicate making INET6-only kernel configs a reality. The entire registration framework can be compiled out by turning on the VIMAGE_GLOBALS kernel config option. Reviewed by: bz Approved by: julian (mentor) Notes: svn path=/head/; revision=190909
* Conditionally compile out V_ globals while instantiating the appropriateMarko Zec2008-12-101-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | container structures, depending on VIMAGE_GLOBALS compile time option. Make VIMAGE_GLOBALS a new compile-time option, which by default will not be defined, resulting in instatiations of global variables selected for V_irtualization (enclosed in #ifdef VIMAGE_GLOBALS blocks) to be effectively compiled out. Instantiate new global container structures to hold V_irtualized variables: vnet_net_0, vnet_inet_0, vnet_inet6_0, vnet_ipsec_0, vnet_netgraph_0, and vnet_gif_0. Update the VSYM() macro so that depending on VIMAGE_GLOBALS the V_ macros resolve either to the original globals, or to fields inside container structures, i.e. effectively #ifdef VIMAGE_GLOBALS #define V_rt_tables rt_tables #else #define V_rt_tables vnet_net_0._rt_tables #endif Update SYSCTL_V_*() macros to operate either on globals or on fields inside container structs. Extend the internal kldsym() lookups with the ability to resolve selected fields inside the virtualization container structs. This applies only to the fields which are explicitly registered for kldsym() visibility via VNET_MOD_DECLARE() and vnet_mod_register(), currently this is done only in sys/net/if.c. Fix a few broken instances of MODULE_GLOBAL() macro use in SCTP code, and modify the MODULE_GLOBAL() macro to resolve to V_ macros, which in turn result in proper code being generated depending on VIMAGE_GLOBALS. De-virtualize local static variables in sys/contrib/pf/net/pf_subr.c which were prematurely V_irtualized by automated V_ prepending scripts during earlier merging steps. PF virtualization will be done separately, most probably after next PF import. Convert a few variable initializations at instantiation to initialization in init functions, most notably in ipfw. Also convert TUNABLE_INT() initializers for V_ variables to TUNABLE_FETCH_INT() in initializer functions. Discussed at: devsummit Strassburg Reviewed by: bz, julian Approved by: julian (mentor) Obtained from: //depot/projects/vimage-commit2/... X-MFC after: never Sponsored by: NLnet Foundation, The FreeBSD Foundation Notes: svn path=/head/; revision=185895
* Remove the now unused `lbolt' variable from the kernel.Ed Schouten2008-08-201-1/+0
| | | | | | | | | | | | | We used to have a single wait channel inside the kernel which could be used by threads that just wanted to sleep for some time (the next second). The old TTY layer was the only piece of code that still used lbolt, because I already removed the use of lbolt from the NFS clients and the VFS syncer. Approved by: philip Notes: svn path=/head/; revision=181921
* Implement the following macros for completeness:Pawel Jakub Dawidek2008-07-211-0/+19
| | | | | | | | | | | | SYSCTL_QUAD() SYSCTL_ADD_QUAD() TUNABLE_QUAD() TUNABLE_QUAD_FETCH() Now we can use 64bit tunables on 32bit systems. Notes: svn path=/head/; revision=180661
* Introduce a new lock, hostname_mtx, and use it to synchronize accessRobert Watson2008-07-051-0/+1
| | | | | | | | | | | | | | | to global hostname and domainname variables. Where necessary, copy to or from a stack-local buffer before performing copyin() or copyout(). A few uses, such as in cd9660 and daemon_saver, remain under-synchronized and will require further updates. Correct a bug in which a failed copyin() of domainname would leave domainname potentially corrupted. MFC after: 3 weeks Notes: svn path=/head/; revision=180291
* Add sysinit levels for DTrace.John Birrell2008-05-181-0/+6
| | | | Notes: svn path=/head/; revision=179095
* o add a mountroot event handler that fires when / is mounted; this informationSam Leffler2008-04-081-1/+0
| | | | | | | | | | was lost when root started being mounted by init o remove SI_SUB_MOUNT_ROOT since it's no longer meaningful MFC after: 2 weeks Notes: svn path=/head/; revision=178016
* Remove trailing ';' from C_SYSINIT() macro definition, in keepingRobert Watson2008-03-161-1/+1
| | | | | | | | | | | | | | with style(9) recommendation that macros not contain the terminating ';', leaving that to the invoker. All SYSINIT() consumers must now provide a trailing ';'. Unlike the change to remove the ';'s from callers, this change shouldn't be MFC'd unless we don't mind requiring source changes to third party modules that might still depend on SYSINIT() providing its own ';'. Notes: svn path=/head/; revision=177254
* Add a new kernel startup event for DDB services, which will include DDBRobert Watson2007-12-251-0/+1
| | | | | | | output capture, scripting, and textdumps. Notes: svn path=/head/; revision=174900
* Remove _SOLARIS_C_SOURCE compatibility definitions. Unfortunately theJohn Birrell2007-11-281-2/+0
| | | | | | | | | | | ZFS porting style didn't extend this, instead using a heap of additional header files that don't get installed. My intention had been to allow OpenSolaris external code to build on FreeBSD out of the box (i.e. without a src tree). Notes: svn path=/head/; revision=174043
* First in a series of changes to remove the now-unused Giant compatibilityRobert Watson2007-07-271-5/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | framework for non-MPSAFE network protocols: - Remove debug_mpsafenet variable, sysctl, and tunable. - Remove NET_NEEDS_GIANT() and associate SYSINITSs used by it to force debug.mpsafenet=0 if non-MPSAFE protocols are compiled into the kernel. - Remove logic to automatically flag interrupt handlers as non-MPSAFE if debug.mpsafenet is set for an INTR_TYPE_NET handler. - Remove logic to automatically flag netisr handlers as non-MPSAFE if debug.mpsafenet is set. - Remove references in a few subsystems, including NFS and Cronyx drivers, which keyed off debug_mpsafenet to determine various aspects of their own locking behavior. - Convert NET_LOCK_GIANT(), NET_UNLOCK_GIANT(), and NET_ASSERT_GIANT into no-op's, as their entire behavior was determined by the value in debug_mpsafenet. - Alias NET_CALLOUT_MPSAFE to CALLOUT_MPSAFE. Many remaining references to NET_.*_GIANT() and NET_CALLOUT_MPSAFE are still present in subsystems, and will be removed in followup commits. Reviewed by: bz, jhb Approved by: re (kensmith) Notes: svn path=/head/; revision=171613
* Fix build breakage.Pawel Jakub Dawidek2007-04-091-1/+1
| | | | Notes: svn path=/head/; revision=168555
* Add kern.hostuuid sysctl, which will be used to keep host's UUID.Pawel Jakub Dawidek2007-04-091-0/+1
| | | | | | | Reviewed by: mlaier, rink, brooks, rwatson Notes: svn path=/head/; revision=168545
* Hide lbolt under _SOLARIS_C_SOURCE in preparation for ZFS import.Pawel Jakub Dawidek2007-04-051-0/+2
| | | | | | | I really couldn't avoid this with preprocessor magic. Notes: svn path=/head/; revision=168393
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