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426da3bcfb
freebsd-nq/sys/kern
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Alfred Perlstein 426da3bcfb SMP Lock struct file, filedesc and the global file list. 
Seigo Tanimura (tanimura) posted the initial delta.

I've polished it quite a bit reducing the need for locking and
adapting it for KSE.

Locks:

1 mutex in each filedesc
   protects all the fields.
   protects "struct file" initialization, while a struct file
     is being changed from &badfileops -> &pipeops or something
     the filedesc should be locked.

1 mutex in each struct file
   protects the refcount fields.
   doesn't protect anything else.
   the flags used for garbage collection have been moved to
     f_gcflag which was the FILLER short, this doesn't need
     locking because the garbage collection is a single threaded
     container.
  could likely be made to use a pool mutex.

1 sx lock for the global filelist.

struct file *	fhold(struct file *fp);
        /* increments reference count on a file */

struct file *	fhold_locked(struct file *fp);
        /* like fhold but expects file to locked */

struct file *	ffind_hold(struct thread *, int fd);
        /* finds the struct file in thread, adds one reference and
                returns it unlocked */

struct file *	ffind_lock(struct thread *, int fd);
        /* ffind_hold, but returns file locked */

I still have to smp-safe the fget cruft, I'll get to that asap.
2002-01-13 11:58:06 +00:00
..
bus_if.m Alter the return value and arguments of the GET_RESOURCE_LIST bus method. 2000-11-28 06:49:15 +00:00
device_if.m
genassym.sh brace by itself after function declaration. 2001-12-27 20:16:21 +00:00
imgact_aout.c Make MAXTSIZ, DFLDSIZ, MAXDSIZ, DFLSSIZ, MAXSSIZ, SGROWSIZ loader 2001-10-10 23:06:54 +00:00
imgact_elf.c Remove whitespace at end of line. 2001-12-16 17:21:16 +00:00
imgact_gzip.c Make MAXTSIZ, DFLDSIZ, MAXDSIZ, DFLSSIZ, MAXSSIZ, SGROWSIZ loader 2001-10-10 23:06:54 +00:00
imgact_shell.c Return a more meaningful errno when the length of the interpreter 2001-11-28 03:26:58 +00:00
inflate.c
init_main.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
init_sysent.c Make AIO a loadable module. 2001-12-29 07:13:47 +00:00
kern_acct.c o Move suser() calls in kern/ to using suser_xxx() with an explicit 2001-11-01 20:56:57 +00:00
kern_acl.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
kern_cap.c Update copyrights to include Thomas Moestl. 2001-11-05 15:36:24 +00:00
kern_clock.c Change the preemption code for software interrupt thread schedules and 2002-01-05 08:47:13 +00:00
kern_condvar.c Change the preemption code for software interrupt thread schedules and 2002-01-05 08:47:13 +00:00
kern_conf.c Add a new sysinit SI_SUB_DEVFS. Devfs hooks into the kernel at SI_ORDER_FIRST, 2002-01-09 04:58:49 +00:00
kern_descrip.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
kern_environment.c Fix an inverted test csae. Success of getenv() is determined by a return 2001-10-25 17:22:31 +00:00
kern_event.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
kern_exec.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
kern_exit.c Release text vnode in exit() rather than wait(). Occasionally 2002-01-05 21:47:58 +00:00
kern_fork.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
kern_idle.c Modify the critical section API as follows: 2001-12-18 00:27:18 +00:00
kern_intr.c Change the preemption code for software interrupt thread schedules and 2002-01-05 08:47:13 +00:00
kern_jail.c - Move _jail sysctl node underneath _kern_security in order to standardize 2001-12-12 05:23:20 +00:00
kern_kthread.c Use a different mechanism to get the vnlru process to wake up and notice 2001-12-19 01:31:12 +00:00
kern_ktr.c Print parm6 too in the !KTR_EXTEND case. 2002-01-01 21:47:38 +00:00
kern_ktrace.c Fix ktrace enablement/disablement races that can result in a vnode 2001-10-24 01:05:39 +00:00
kern_linker.c - Ensure that linker file id's are unique, rather than blindly 2001-11-18 18:19:35 +00:00
kern_lock.c Fix a BUF_TIMELOCK race against BUF_LOCK and fix a deadlock in vget() 2001-12-20 22:42:27 +00:00
kern_lockf.c make LOCKF_DEBUG kernel option work (sorta) 2001-12-02 12:47:25 +00:00
kern_malloc.c KSE Milestone 2 2001-09-12 08:38:13 +00:00
kern_mib.c Add/correct description for some sysctl variables where it was missing. 2001-12-16 16:07:20 +00:00
kern_module.c KSE Milestone 2 2001-09-12 08:38:13 +00:00
kern_mtxpool.c cast hashing index to (int)(intptr_t) for calculation. 2001-11-19 00:20:36 +00:00
kern_mutex.c Change the preemption code for software interrupt thread schedules and 2002-01-05 08:47:13 +00:00
kern_ntptime.c KSE Milestone 2 2001-09-12 08:38:13 +00:00
kern_physio.c
kern_poll.c Complete the device polling support by adding a thread in charge 2001-12-19 00:53:24 +00:00
kern_proc.c Fix a bug where the mutex name wasn't always displayed for processes in 2002-01-05 17:18:59 +00:00
kern_prot.c - Push much of the logic for p_cansignal() behind cr_cansignal, which 2002-01-06 00:20:12 +00:00
kern_random.c This patchset fixes a large number of file descriptor race conditions. 2000-11-18 21:01:04 +00:00
kern_resource.c *** empty log message *** 2001-11-04 18:22:48 +00:00
kern_sema.c Repeat after me -- "Use of ANSI string concatenation can be bad." 2001-12-10 05:40:12 +00:00
kern_shutdown.c Change the preemption code for software interrupt thread schedules and 2002-01-05 08:47:13 +00:00
kern_sig.c o Revert kern_sig.c#1.143, as cr_cansignal() doesn't currently permit 2002-01-10 01:25:35 +00:00
kern_subr.c Change the preemption code for software interrupt thread schedules and 2002-01-05 08:47:13 +00:00
kern_switch.c Modify the critical section API as follows: 2001-12-18 00:27:18 +00:00
kern_sx.c Update to C99, s/__FUNCTION__/__func__/. 2001-12-10 05:51:45 +00:00
kern_synch.c Change the preemption code for software interrupt thread schedules and 2002-01-05 08:47:13 +00:00
kern_syscalls.c KSE Milestone 2 2001-09-12 08:38:13 +00:00
kern_sysctl.c Add code to export and print the description associated to sysctl 2001-12-16 02:55:41 +00:00
kern_tc.c Remove a bogus #ifdef KTR stanza. 2001-01-01 23:09:53 +00:00
kern_time.c o Modify static settime() to accept the proc * for the process requesting 2001-09-26 19:53:57 +00:00
kern_timeout.c Move most of the kernel submap initialization code, including the 2001-08-22 04:07:27 +00:00
kern_xxx.c KSE Milestone 2 2001-09-12 08:38:13 +00:00
ksched.c KSE Milestone 2 2001-09-12 08:38:13 +00:00
link_aout.c Since we used '#ifdef __i386__', don't close with '#endif /* !__alpha__ */' 2001-11-24 10:11:14 +00:00
link_elf_obj.c Fix a number of misspellings of "dependency" and "dependencies" in 2001-11-16 21:08:40 +00:00
link_elf.c Fix a number of misspellings of "dependency" and "dependencies" in 2001-11-16 21:08:40 +00:00
linker_if.m Add the sysctl "kern.function_list", which currently exports all 2001-10-30 15:21:45 +00:00
Make.tags.inc Update pathnames for creation of tags file. 2001-12-05 01:23:21 +00:00
Makefile Don't generate <sys/syscalls-hide.h> it has never had any users anywhere in 2001-10-13 09:17:49 +00:00
makeobjops.pl Switch warnings and strict back on again in a way that's compatible 2001-11-16 02:02:42 +00:00
makesyscalls.sh Don't generate <sys/syscalls-hide.h> it has never had any users anywhere in 2001-10-13 09:17:49 +00:00
md4c.c Import kernel part of SMB/CIFS requester. 2001-04-10 07:59:06 +00:00
md5c.c Add ia64 support. 2000-09-29 13:36:47 +00:00
p1003_1b.c KSE Milestone 2 2001-09-12 08:38:13 +00:00
posix4_mib.c
subr_acl_posix1e.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
subr_autoconf.c
subr_blist.c With Alfred's permission, remove vm_mtx in favor of a fine-grained approach 2001-07-04 16:20:28 +00:00
subr_bus.c Fixed an apparent typo ("-" before ":") and an English error (comma 2001-12-28 18:32:13 +00:00
subr_clist.c Make cblock_alloc_cblocks() spell its own name 2001-03-27 10:21:26 +00:00
subr_devstat.c Export the head structure for the device statistics STAILQ in 2001-08-04 18:02:47 +00:00
subr_disk.c Don't call cdevsw_add(). 2001-11-04 11:56:22 +00:00
subr_disklabel.c Fix typo so that the delay code introduced in revision 1.60 actually 2002-01-12 02:04:15 +00:00
subr_diskmbr.c Wrap Dangerously Dedicated printf under if (bootverbose) 2001-12-11 05:35:43 +00:00
subr_diskslice.c KSE Milestone 2 2001-09-12 08:38:13 +00:00
subr_eventhandler.c KSE Milestone 2 2001-09-12 08:38:13 +00:00
subr_hints.c Fix a fatal type mismatch (char *static_env; vs char static_env[]). 2001-09-17 21:27:41 +00:00
subr_kobj.c Convert more malloc+bzero to malloc+M_ZERO. 2000-12-08 21:51:06 +00:00
subr_log.c Use the passed in thread to selrecord() instead of curthread. 2001-09-21 22:46:54 +00:00
subr_mbuf.c On the first day of Christmas bde gave to me: 2001-12-23 22:04:08 +00:00
subr_mchain.c Update to C99, s/__FUNCTION__/__func__/. 2001-12-10 05:51:45 +00:00
subr_module.c Preceed/preceeding are not english words. Use precede and preceding. 2001-02-18 10:43:53 +00:00
subr_param.c Proper fix for old config setting maxusers to 8. 2001-12-14 09:39:29 +00:00
subr_pcpu.c Add a per-cpu variable, cpumask, the preshifted equivalent of 1 << cpuid. 2002-01-05 09:35:50 +00:00
subr_power.c Some fix for the recent apm module changes. 2001-11-01 16:34:07 +00:00
subr_prf.c o Introduce kern.security.bsd.unprivileged_read_msgbuf, which allows 2001-11-30 21:40:52 +00:00
subr_prof.c - Change all callers of addupc_task() to check PS_PROFIL explicitly and 2001-12-18 09:06:10 +00:00
subr_rman.c Add a rman_reserve_resource_bound() function that takes an additional 2001-12-21 21:40:55 +00:00
subr_sbuf.c Replace spaces after #defines with tabs; this makes all #defines 2002-01-09 07:29:28 +00:00
subr_scanf.c
subr_smp.c Fix forward_roundrobin(). It was mistakenly using the cpu number as 2002-01-05 09:38:47 +00:00
subr_taskqueue.c Change the preemption code for software interrupt thread schedules and 2002-01-05 08:47:13 +00:00
subr_trap.c Change the preemption code for software interrupt thread schedules and 2002-01-05 08:47:13 +00:00
subr_turnstile.c Change the preemption code for software interrupt thread schedules and 2002-01-05 08:47:13 +00:00
subr_witness.c Change the preemption code for software interrupt thread schedules and 2002-01-05 08:47:13 +00:00
subr_xxx.c KSE Milestone 2 2001-09-12 08:38:13 +00:00
sys_generic.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
sys_pipe.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
sys_process.c Move procfs_* from procfs_machdep.c into sys_process.c, and rename them to 2001-10-21 23:57:24 +00:00
sys_socket.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
syscalls.c Add nmount() stub function and regenerate the syscall-glue which should 2001-11-02 17:59:23 +00:00
syscalls.master Make AIO a loadable module. 2001-12-29 07:13:47 +00:00
sysv_ipc.c Eliminate semexit_hook using at_exit(9) and rm_at_exit(9). 2001-12-30 18:55:09 +00:00
sysv_msg.c Make AIO a loadable module. 2001-12-29 07:13:47 +00:00
sysv_sem.c Eliminate semexit_hook using at_exit(9) and rm_at_exit(9). 2001-12-30 18:55:09 +00:00
sysv_shm.c Make AIO a loadable module. 2001-12-29 07:13:47 +00:00
tty_compat.c
tty_conf.c KSE Milestone 2 2001-09-12 08:38:13 +00:00
tty_cons.c Fix boot -p for DDBless kernels 2001-12-11 10:21:26 +00:00
tty_pty.c o Move suser() calls in kern/ to using suser_xxx() with an explicit 2001-11-01 20:56:57 +00:00
tty_subr.c Make cblock_alloc_cblocks() spell its own name 2001-03-27 10:21:26 +00:00
tty_tty.c KSE Milestone 2 2001-09-12 08:38:13 +00:00
tty.c utime/stime.tv_sec are elapsed times, not relative to 1970. We can 2001-11-17 00:26:57 +00:00
uipc_accf.c Revert the last bits of my bogus move of NMBCLUSTERS 2001-06-01 21:47:34 +00:00
uipc_domain.c Update the comment about System initialization to reflect the use of 2001-12-08 04:20:54 +00:00
uipc_mbuf2.c Sync with recent KAME. 2001-06-11 12:39:29 +00:00
uipc_mbuf.c Update to C99, s/__FUNCTION__/__func__/. 2001-12-10 05:51:45 +00:00
uipc_proto.c Implement a LOCAL_PEERCRED socket option which returns a 2001-08-17 22:01:18 +00:00
uipc_sockbuf.c Revert 1.81; 1.19 fixed this already in a different way. 2002-01-09 01:45:17 +00:00
uipc_socket2.c Revert 1.81; 1.19 fixed this already in a different way. 2002-01-09 01:45:17 +00:00
uipc_socket.c o Make the credential used by socreate() an explicit argument to 2001-12-31 17:45:16 +00:00
uipc_syscalls.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
uipc_usrreq.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
vfs_acl.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
vfs_aio.c o Correct a 32/64-bit error in the initialization of aiol_zone, specifically, 2002-01-09 06:40:45 +00:00
vfs_bio.c This fixes a large number of bugs in our NFS client side code. A recent 2001-12-14 01:16:57 +00:00
vfs_cache.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
vfs_cluster.c Implement IO_NOWDRAIN and B_NOWDRAIN - prevents the buffer cache from blocking 2001-11-05 18:48:54 +00:00
vfs_conf.c Remove the use of _PATH_DEV in the example. 2001-11-24 01:34:12 +00:00
vfs_default.c Fix incorrect double-termination of vm_object. When a vm_object is 2001-10-23 01:23:41 +00:00
vfs_export.c Fix some signed/unsigned integer confusion, and add bounds checking of 2001-09-10 11:28:07 +00:00
vfs_extattr.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
vfs_init.c Revert consequences of changes to mount.h, part 2. 2001-04-29 02:45:39 +00:00
vfs_lookup.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
vfs_mount.c Remove the use of _PATH_DEV in the example. 2001-11-24 01:34:12 +00:00
vfs_subr.c Add vlruvp() routine - implements LRU operation for vnode recycling. 2002-01-10 18:31:53 +00:00
vfs_syscalls.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
vfs_vnops.c SMP Lock struct file, filedesc and the global file list. 2002-01-13 11:58:06 +00:00
vnode_if.pl Throw the $FreeBSD$s back in, properly escaping them. 2002-01-04 05:27:47 +00:00
vnode_if.src KSE Milestone 2 2001-09-12 08:38:13 +00:00