Poul-Henning Kamp e606a3c63e Rewamp DEVFS internals pretty severely [1]. ... Give DEVFS a proper inode called struct cdev_priv. It is important to keep in mind that this "inode" is shared between all DEVFS mountpoints, therefore it is protected by the global device mutex. Link the cdev_priv's into a list, protected by the global device mutex. Keep track of each cdev_priv's state with a flag bit and of references from mountpoints with a dedicated usecount. Reap the benefits of much improved kernel memory allocator and the generally better defined device driver APIs to get rid of the tables of pointers + serial numbers, their overflow tables, the atomics to muck about in them and all the trouble that resulted in. This makes RAM the only limit on how many devices we can have. The cdev_priv is actually a super struct containing the normal cdev as the "public" part, and therefore allocation and freeing has moved to devfs_devs.c from kern_conf.c. The overall responsibility is (to be) split such that kern/kern_conf.c is the stuff that deals with drivers and struct cdev and fs/devfs handles filesystems and struct cdev_priv and their private liason exposed only in devfs_int.h. Move the inode number from cdev to cdev_priv and allocate inode numbers properly with unr. Local dirents in the mountpoints (directories, symlinks) allocate inodes from the same pool to guarantee against overlaps. Various other fields are going to migrate from cdev to cdev_priv in the future in order to hide them. A few fields may migrate from devfs_dirent to cdev_priv as well. Protect the DEVFS mountpoint with an sx lock instead of lockmgr, this lock also protects the directory tree of the mountpoint. Give each mountpoint a unique integer index, allocated with unr. Use it into an array of devfs_dirent pointers in each cdev_priv. Initially the array points to a single element also inside cdev_priv, but as more devfs instances are mounted, the array is extended with malloc(9) as necessary when the filesystem populates its directory tree. Retire the cdev alias lists, the cdev_priv now know about all the relevant devfs_dirents (and their vnodes) and devfs_revoke() will pick them up from there. We still spelunk into other mountpoints and fondle their data without 100% good locking. It may make better sense to vector the revoke event into the tty code and there do a destroy_dev/make_dev on the tty's devices, but that's for further study. Lots of shuffling of stuff and churn of bits for no good reason[2]. XXX: There is still nothing preventing the dev_clone EVENTHANDLER from being invoked at the same time in two devfs mountpoints. It is not obvious what the best course of action is here. XXX: comment out an if statement that lost its body, until I can find out what should go there so it doesn't do damage in the meantime. XXX: Leave in a few extra malloc types and KASSERTS to help track down any remaining issues. Much testing provided by: Kris Much confusion caused by (races in): md(4) [1] You are not supposed to understand anything past this point. [2] This line should simplify life for the peanut gallery.		2005-09-19 19:56:48 +00:00
..
bus_if.m
clock_if.m
cpufreq_if.m
device_if.m
genassym.sh
imgact_aout.c	- Neither of our image formats require Giant now that the vm and vfs have	2005-05-03 10:51:38 +00:00
imgact_elf32.c
imgact_elf64.c
imgact_elf.c	Add GIANT_REQUIRED and WITNESS sleep warnings to uprintf() and tprintf(),	2005-09-19 16:51:43 +00:00
imgact_gzip.c	- Change the vm_mmap() function to accept an objtype_t parameter specifying	2005-04-01 20:00:11 +00:00
imgact_shell.c	Fix a panic which could occur parsing #!-lines in a shell-script. If the	2005-06-19 02:21:03 +00:00
inflate.c
init_main.c	Remove mac_create_root_mount() and mpo_create_root_mount(), which	2005-09-19 13:59:57 +00:00
init_sysent.c	Regen.	2005-07-08 15:06:58 +00:00
kern_acct.c	When mac_check_system_acct() fails, make sure to unlock as well as close	2005-03-01 08:56:13 +00:00
kern_acl.c	Implement new world order in VFS locking for ACLs. This will remove the	2005-09-17 22:01:14 +00:00
kern_alq.c	Modify the alq(9) alq_open() API to accept a file creation mode, rather	2005-04-16 12:12:27 +00:00
kern_clock.c	Use SCTL_MASK32 to determine that the sysctl call is from a 32bit	2005-06-30 17:17:29 +00:00
kern_condvar.c
kern_conf.c	Rewamp DEVFS internals pretty severely [1].	2005-09-19 19:56:48 +00:00
kern_context.c
kern_cpu.c	Break out the checks for duplicates and absolute settings being too high	2005-09-02 16:32:43 +00:00
kern_descrip.c	Two minor optimizations of fdalloc():	2005-08-26 11:16:39 +00:00
kern_environment.c	Add bounds checking to the setenv part of the kernel environment.	2005-07-31 10:28:35 +00:00
kern_event.c	Fix race condition that caused activation of an event to	2005-09-15 21:10:12 +00:00
kern_exec.c	MFP4:	2005-06-30 19:01:26 +00:00
kern_exit.c	Add witness warnings to panic if a thread tries to exit while holding any	2005-09-02 20:20:01 +00:00
kern_fork.c	Fix the recent panics/LORs/hangs created by my kqueue commit by:	2005-07-01 16:28:32 +00:00
kern_idle.c	Divorce critical sections from spinlocks. Critical sections as denoted by	2005-04-04 21:53:56 +00:00
kern_intr.c	Don't disallow sleeping for handlers on swi's since some swi handlers	2005-09-15 20:08:21 +00:00
kern_jail.c	Actually only protect mount-point if security.jail.enforce_statfs is set to 2.	2005-06-23 22:13:29 +00:00
kern_kse.c	Add witness warnings to panic if a thread tries to exit while holding any	2005-09-02 20:20:01 +00:00
kern_kthread.c
kern_ktr.c	- Add curthread to the state that ktr is saving. The extra information is	2005-06-10 23:21:29 +00:00
kern_ktrace.c	Close another information leak in ktrace(2): one was able to find active	2005-06-24 12:05:24 +00:00
kern_linker.c	Fix panic when module is compiled in and it is loaded from loader.conf.	2005-05-28 23:20:05 +00:00
kern_lock.c	Print out a warning and a backtrace if we try to unlock a lockmgr that	2005-09-02 15:56:01 +00:00
kern_lockf.c	Print name of device instead of useless major/minor numbers.	2005-03-29 08:13:01 +00:00
kern_mac.c	Bump the module versions of the MAC Framework and MAC policy modules	2005-07-14 10:46:03 +00:00
kern_malloc.c	Long overdue, keep up with mbuf.h,v 1.148.	2005-08-02 20:03:23 +00:00
kern_mbuf.c	Define four constants, MBUF_{,MEM,CLUSTER,PACKET,TAG}_MEM_NAME, which	2005-07-17 14:04:03 +00:00
kern_mib.c	mp_ncpus is always (properly) initialized, even on UP kernels, so just use it.	2005-08-21 18:03:31 +00:00
kern_module.c
kern_mtxpool.c
kern_mutex.c	- Add an assertion to panic if one tries to call mtx_trylock() on a spin	2005-09-02 20:21:49 +00:00
kern_ntptime.c	Explicitly acquire Giant around the ntp_gettime() and assert it in the	2005-05-28 14:34:41 +00:00
kern_physio.c
kern_pmc.c	Fail the module loading process if the currently executing kernel	2005-07-30 09:02:42 +00:00
kern_poll.c	Document flags of a pollrec.	2005-09-06 11:09:18 +00:00
kern_proc.c	Add a sysctl that returns the full path of a process' text file.	2005-04-18 02:10:37 +00:00
kern_prot.c	Introduce p_canwait() and MAC Framework and MAC Policy entry points	2005-04-18 13:36:57 +00:00
kern_resource.c	Giant is no longer required in kern_setrlimit(); remove its acquisition and	2005-06-01 17:52:51 +00:00
kern_sema.c
kern_shutdown.c	Add a new struct buf flag bit, B_PERSISTENT, and use it to tag	2005-09-08 06:30:05 +00:00
kern_sig.c	Fix a bug relavant to debugging, a masked signal unexpectedly interrupts	2005-06-06 05:13:10 +00:00
kern_subr.c
kern_switch.c	In adjustrunqueue(), add code to handle thread migrating case for	2005-08-03 01:23:45 +00:00
kern_sx.c
kern_synch.c	Use low level constructs borrowed from interrupt threads to wait for	2005-05-23 23:01:53 +00:00
kern_syscalls.c
kern_sysctl.c	Drop in a WITNESS_WARN into SYSCTL_IN to make sure that we are	2005-08-08 21:06:42 +00:00
kern_tc.c	Forward declaring static variables as extern is invalid ISO-C. Now that	2005-09-07 10:06:14 +00:00
kern_thr.c	Validate if the value written into {FS,GS}.base is a canonical	2005-07-10 23:31:11 +00:00
kern_thread.c	Remove sleep queue hack, it is no longer needed with current sleep queue.	2005-05-27 04:27:22 +00:00
kern_time.c	Implement kern_adjtime(), kern_readv(), kern_sched_rr_get_interval(),	2005-03-31 22:51:18 +00:00
kern_timeout.c	Oops, missed adding the required include.	2005-09-15 20:20:36 +00:00
kern_umtx.c	Allocate umtx_q from heap instead of stack, this avoids	2005-03-05 09:15:03 +00:00
kern_uuid.c	Move the UUID generator into its own function, called kern_uuidgen(),	2005-09-18 21:40:15 +00:00
kern_xxx.c
ksched.c
link_elf_obj.c	Handle vm_map_wire()'s failure.	2005-08-28 05:38:40 +00:00
link_elf.c	Correctly handle vm_map_wire()'s failure. (See also revisions 1.81 and	2005-08-28 04:50:11 +00:00
linker_if.m
Make.tags.inc
Makefile	Add a 'sysent' target that depends on the various files built from	2005-07-13 20:50:17 +00:00
makesyscalls.sh	Introduce a new field in the syscalls.master file format to hold the	2005-05-30 15:09:18 +00:00
md4c.c
md5c.c
p1003_1b.c	Actually commit the code for kern_sched_get_rr_interval().	2005-03-31 22:54:48 +00:00
posix4_mib.c
sched_4bsd.c	Move HWPMC_HOOKS into its own opt_hwpmc_hooks.h file. It doesn't merit	2005-06-24 00:16:57 +00:00
sched_ule.c	Move up code for testing KEF_HOLD to avoid ke_cpu being changed unexpectly	2005-08-19 11:51:41 +00:00
subr_acl_posix1e.c	Implement new world order in VFS locking for ACLs. This will remove the	2005-09-17 22:01:14 +00:00
subr_autoconf.c
subr_blist.c
subr_bus.c	MFp4: Expose device_probe_child()	2005-09-18 01:32:09 +00:00
subr_clist.c
subr_clock.c
subr_devstat.c	- Remove two mtx_asserts that can incorrectly trigger if	2005-05-03 10:58:05 +00:00
subr_disk.c	- Fix insertions of bios which represent data earlier than anything else	2005-06-15 23:32:07 +00:00
subr_eventhandler.c
subr_hints.c	The resource_xxx routines in subr_hints.c are called before and after the	2005-07-31 10:46:55 +00:00
subr_kdb.c	Move the KDB_STOP_NMI option from opt_global.h to opt_kdb.h	2005-06-29 23:23:16 +00:00
subr_kobj.c	Export a routine, kobj_machdep_init(), that allows platforms	2005-08-07 02:20:35 +00:00
subr_log.c	Use dynamic major number allocation.	2005-02-27 22:02:03 +00:00
subr_mbpool.c
subr_mchain.c	Change API of mb_copy_t in libmchain so that netsmb can handle	2005-07-29 13:22:37 +00:00
subr_module.c
subr_msgbuf.c
subr_param.c	Increase default HZ for sparc64 to 1000.	2005-04-16 15:07:41 +00:00
subr_pcpu.c
subr_power.c
subr_prf.c	Add GIANT_REQUIRED and WITNESS sleep warnings to uprintf() and tprintf(),	2005-09-19 16:51:43 +00:00
subr_prof.c	netchild's mega-patch to isolate compiler dependencies into a central	2005-03-02 21:33:29 +00:00
subr_rman.c	If we are going to	2005-05-06 02:50:00 +00:00
subr_rtc.c
subr_sbuf.c
subr_scanf.c
subr_sleepqueue.c	- Add a new simple facility for marking the current thread as being in a	2005-09-15 19:05:37 +00:00
subr_smp.c	Second part of commit for moving KDB_STOP_NMI from opt_global.h to	2005-06-30 03:38:10 +00:00
subr_stack.c	Add 'depth' argument to CTRSTACK() macro, which allows to reduce number	2005-08-29 11:34:08 +00:00
subr_taskqueue.c	o enable shutdown of taskqueue threads; the thread servicing the queue checks	2005-05-01 00:38:11 +00:00
subr_trap.c	- Rev 1.83 of kern_lock.c fixes the td_locks assert, reenable it here.	2005-03-28 12:52:46 +00:00
subr_turnstile.c
subr_unit.c	Remove debugging printfs.	2005-03-14 06:51:29 +00:00
subr_witness.c	- Enforce an implicit lock order that Giant cannot be locked while holding	2005-09-15 19:07:14 +00:00
sys_generic.c	- Add two new system calls: preadv() and pwritev() which are like readv()	2005-07-07 18:17:55 +00:00
sys_pipe.c	Fix the recent panics/LORs/hangs created by my kqueue commit by:	2005-07-01 16:28:32 +00:00
sys_process.c	Fix a LOR between sched_lock and sleep queue lock.	2005-08-19 13:35:34 +00:00
sys_socket.c	Introduce three additional MAC Framework and MAC Policy entry points to	2005-04-16 18:46:29 +00:00
syscalls.c	Regen.	2005-07-08 15:06:58 +00:00
syscalls.master	Mark second instance of lchown() MP safe just like the first.	2005-07-08 15:01:13 +00:00
sysv_ipc.c
sysv_msg.c
sysv_sem.c	Gratuitous renaming of four System V Semaphore MAC Framework entry	2005-06-07 05:03:28 +00:00
sysv_shm.c	Change the data type of the upper shared memory limits from a signed	2005-08-06 07:20:18 +00:00
tty_compat.c
tty_conf.c
tty_cons.c	Use dynamic major number allocation for /dev/console, there is no	2005-02-27 21:52:42 +00:00
tty_pty.c	Merge the dev_clone and dev_clone_cred event handlers into a single	2005-08-08 19:55:32 +00:00
tty_subr.c
tty_tty.c	Merge the dev_clone and dev_clone_cred event handlers into a single	2005-08-08 19:55:32 +00:00
tty.c	Fix the recent panics/LORs/hangs created by my kqueue commit by:	2005-07-01 16:28:32 +00:00
uipc_accf.c	o setsockopt(2) cannot remove accept filter. [1]	2005-06-11 11:59:48 +00:00
uipc_cow.c	Allow sends sent from non page-aligned userspace addresses to be	2005-06-05 17:13:23 +00:00
uipc_domain.c
uipc_mbuf2.c	Define four constants, MBUF_{,MEM,CLUSTER,PACKET,TAG}_MEM_NAME, which	2005-07-17 14:04:03 +00:00
uipc_mbuf.c	Changes and cleanups to m_sanity():	2005-08-30 21:31:42 +00:00
uipc_proto.c
uipc_sem.c	In sem_forkhook(), don't attempt to generate a copy of the process semaphore	2005-06-08 07:29:22 +00:00
uipc_sockbuf.c	Re-comment sbcompress() to explain what it is it does; it took me	2005-09-18 10:30:10 +00:00
uipc_socket2.c	Re-comment sbcompress() to explain what it is it does; it took me	2005-09-18 10:30:10 +00:00
uipc_socket.c	Add three new read-only socket options, which allow regression tests	2005-09-18 21:08:03 +00:00
uipc_syscalls.c	Add MAC Framework and MAC policy entry point mac_check_socket_create(),	2005-07-05 22:49:10 +00:00
uipc_usrreq.c	Fix two issues which were missed in FreeBSD-SA-05:08.kmem.	2005-05-07 00:41:36 +00:00
vfs_acl.c	Implement new world order in VFS locking for ACLs. This will remove the	2005-09-17 22:01:14 +00:00
vfs_aio.c	Eliminate inconsistency in the setting of the B_DONE flag. Specifically,	2005-07-20 19:06:06 +00:00
vfs_bio.c	- Use lockmgr_printinfo rather than rolling our own. This introduces a	2005-08-03 05:02:08 +00:00
vfs_cache.c	- Fix a leaked reference to a vnode via v_dd. We rely on cache_purge() and	2005-06-17 01:05:13 +00:00
vfs_cluster.c	Do not use vm_pager_init() to initialize vnode_pbuf_freecnt variable.	2005-08-13 20:21:33 +00:00
vfs_default.c	In vop_stdpathconf(ap) also default for _PC_NAME_MAX and _PC_PATH_MAX.	2005-08-17 06:59:23 +00:00
vfs_export.c	Handle theoretical case of vfs_export being called with both MNT_DELEXPORT and	2005-05-11 18:25:42 +00:00
vfs_extattr.c	Improve the MP safeness associated with the creation of symbolic	2005-09-15 15:03:48 +00:00
vfs_hash.c	Don't retry when vget() returns ENOENT in the nonblocking case due to the	2005-09-12 01:48:57 +00:00
vfs_init.c
vfs_lookup.c	Improve the MP safeness associated with the creation of symbolic	2005-09-15 15:03:48 +00:00
vfs_mount.c	Don't unbusy the devfs mount in vfs_mountroot_try() as it gets accessed	2005-09-02 13:37:54 +00:00
vfs_subr.c	Break out of loop if next buffer pointer has become invalid while flushing	2005-09-16 18:28:12 +00:00
vfs_syscalls.c	Improve the MP safeness associated with the creation of symbolic	2005-09-15 15:03:48 +00:00
vfs_vnops.c	- Replace the series of DEBUG_LOCKS hacks which tried to save the vn_lock	2005-08-03 04:48:22 +00:00
vnode_if.src	Allow EVFILT_VNODE events to work on every filesystem type, not just	2005-06-09 20:20:31 +00:00