Attilio Rao 4a0f807602 1) Fix a deadlock in the VFS: ...

- threadA runs vfs_rel(mp1)
- threadB does unmount the mp1 fs, sets MNTK_UNMOUNT and drop MNT_ILOCK()
- threadA runs vfs_busy(mp1) and, as long as, MNTK_UNMOUNT is set, sleeps
  waiting for threadB to complete the unmount
- threadB, in vfs_mount_destroy(), finds mnt_lock > 0 and sleeps waiting
  for the refcount to expire.

Fix the deadlock by adding a flag called MNTK_REFEXPIRE which signals the
unmounter is waiting for mnt_ref to expire.
The vfs_busy contenders got awake, fails, and if they retry the
MNTK_REFEXPIRE won't allow them to sleep again.

2) Simplify significantly the code of vfs_mount_destroy() trimming
   unnecessary codes:
   - as long as any reference exited, it is no-more possible to have
     write-op (primarty and secondary) in progress.
   - it is no needed to drop and reacquire the mount lock.
   - filling the structures with dummy values is unuseful as long as
     it is going to be freed.

Tested by:	pho, Andrea Barberio <insomniac at slackware dot it>
Discussed with:	kib

2008-12-16 23:16:10 +00:00

..

bus_if.m

Allow device hints to wire the unit numbers of devices.

2008-11-18 21:01:54 +00:00

clock_if.m

…

cpufreq_if.m

…

device_if.m

…

genassym.sh

refactor code so it can run in a chroot without having to have /dev/mounted

2008-01-18 17:02:14 +00:00

imgact_aout.c

Add sv_flags field to struct sysentvec with intention to provide description

2008-11-22 12:36:15 +00:00

imgact_elf32.c

…

imgact_elf64.c

…

imgact_elf.c

If the ABI-overriden interpreter was not loaded, do not set

2008-10-08 11:11:36 +00:00

imgact_gzip.c

VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in

2008-01-13 14:44:15 +00:00

imgact_shell.c

Decontextualize the couplet VOP_GETATTR / VOP_SETATTR as the passed thread

2008-08-28 15:23:18 +00:00

inflate.c

…

init_main.c

Rename three MAC entry points from _proc_ to _cred_ to reflect the fact

2008-10-28 11:33:06 +00:00

init_sysent.c

Regenerate system call tables for r184789.

2008-11-09 10:48:06 +00:00

kern_acct.c

Properly lock proctree_lock before locking the process while accounting.

2008-08-21 15:02:17 +00:00

kern_alq.c

Use msleep_spin() instead of unlock/tsleep/lock. This was

2008-07-02 20:44:33 +00:00

kern_clock.c

Implement per-cpu callout threads, wheels, and locks.

2008-04-02 11:20:30 +00:00

kern_condvar.c

- Don't do a WITNESS_SAVE() on the interlock if it is Giant in the condition

2008-09-25 13:42:19 +00:00

kern_conf.c

Explicitely note that destroy_dev() sleeps.

2008-11-27 16:47:25 +00:00

kern_cons.c

Reimplement the /dev/console device node.

2008-11-01 08:35:28 +00:00

kern_context.c

Further system call comment cleanup:

2007-03-05 13:10:58 +00:00

kern_cpu.c

If possible, try to obtain max_mhz on cpufreq attach instead of first request.

2008-12-16 01:24:05 +00:00

kern_cpuset.c

MFp4:

2008-11-29 14:32:14 +00:00

kern_ctf.c

Add the CTF source file which gets shared with link_elf.c and link_elf_obj.c.

2008-05-23 03:04:27 +00:00

kern_descrip.c

Merge user/peter/kinfo branch as of r185547 into head.

2008-12-02 06:50:26 +00:00

kern_dtrace.c

Remove code that isn't required. It actually breaks the case where KDTRACE_HOOKS

2008-06-16 04:44:29 +00:00

kern_environment.c

Implement the following macros for completeness:

2008-07-21 15:05:25 +00:00

kern_event.c

Fix a number of style issues in the MALLOC / FREE commit. I've tried to

2008-10-23 20:26:15 +00:00

kern_exec.c

Several threads in a process may do vfork() simultaneously. Then, all

2008-12-05 20:50:24 +00:00

kern_exit.c

Several threads in a process may do vfork() simultaneously. Then, all

2008-12-05 20:50:24 +00:00

kern_fork.c

Several threads in a process may do vfork() simultaneously. Then, all

2008-12-05 20:50:24 +00:00

kern_idle.c

In keeping with style(9)'s recommendations on macros, use a ';'

2008-03-16 10:58:09 +00:00

kern_intr.c

style(9)

2008-09-23 14:25:56 +00:00

kern_jail.c

Correctly check the number of prison states to not access anything

2008-12-11 01:04:25 +00:00

kern_kthread.c

Kill a dead variable

2008-08-03 21:07:19 +00:00

kern_ktr.c

…

kern_ktrace.c

Fix a credential reference leak. [1]

2008-12-03 15:54:35 +00:00

kern_linker.c

Conditionally compile out V_ globals while instantiating the appropriate

2008-12-10 23:12:39 +00:00

kern_lock.c

Teach WITNESS about the interlocks used with lockmgr. This removes a bunch

2008-09-10 19:13:30 +00:00

kern_lockf.c

Remove unused variable.

2008-11-27 04:40:37 +00:00

kern_malloc.c

Enable the creation of a kmem map larger than 4GB.

2008-07-05 19:34:33 +00:00

kern_mbuf.c

Make sure nmbclusters are initialized before maxsockets

2008-12-10 22:17:09 +00:00

kern_mib.c

Step 1.5 of importing the network stack virtualization infrastructure

2008-10-02 15:37:58 +00:00

kern_module.c

When the SYSINIT() to load a module invokes the MOD_LOAD event successfully,

2008-12-05 16:47:30 +00:00

kern_mtxpool.c

Fix a number of style issues in the MALLOC / FREE commit. I've tried to

2008-10-23 20:26:15 +00:00

kern_mutex.c

Teach WITNESS about the interlocks used with lockmgr. This removes a bunch

2008-09-10 19:13:30 +00:00

kern_ntptime.c

In keeping with style(9)'s recommendations on macros, use a ';'

2008-03-16 10:58:09 +00:00

kern_osd.c

Update ZFS from version 6 to 13 and bring some FreeBSD-specific changes.

2008-11-17 20:49:29 +00:00

kern_physio.c

…

kern_pmc.c

Support sparsely numbered CPUs.

2008-09-22 10:37:02 +00:00

kern_poll.c

Order #includes - also to reduce diffs with vimage branches in p4.

2008-12-11 16:09:31 +00:00

kern_priv.c

Remove the suser(9) interface from the kernel. It has been replaced from

2008-09-17 15:49:44 +00:00

kern_proc.c

Reference the vmspace of the process being inspected by procfs, linprocfs

2008-12-12 12:12:36 +00:00

kern_prot.c

The userland_sysctl() function retries sysctl_root() until returned

2008-12-12 12:06:28 +00:00

kern_resource.c

Don't rearm callout if the process is exiting, it may leak a callout

2008-10-24 01:09:24 +00:00

kern_rmlock.c

Teach WITNESS about the interlocks used with lockmgr. This removes a bunch

2008-09-10 19:13:30 +00:00

kern_rwlock.c

add RW_SYSINIT_FLAGS macro and rw_sysinit_flags initialization function

2008-12-08 21:46:55 +00:00

kern_sdt.c

Add kernel support for the Statically Defined Trace provider.

2008-05-18 19:32:36 +00:00

kern_sema.c

…

kern_shutdown.c

It's possible that the dump device has gone away after it was

2008-11-23 21:05:22 +00:00

kern_sig.c

Revert rev 184216 and 184199, due to the way the thread_lock works,

2008-11-05 03:01:23 +00:00

kern_subr.c

Make ureadc() warn when holding any locks, just like uiomove().

2008-08-28 19:34:58 +00:00

kern_switch.c

fix typo in runz_fuzz

2008-05-12 06:42:06 +00:00

kern_sx.c

Teach WITNESS about the interlocks used with lockmgr. This removes a bunch

2008-09-10 19:13:30 +00:00

kern_synch.c

- Forward port flush of page table updates on context switch or userret

2008-10-19 01:35:27 +00:00

kern_syscalls.c

Various style fixes. 7 space indent is just odd.

2008-09-18 20:10:11 +00:00

kern_sysctl.c

Uio_yield() already does DROP_GIANT/PICKUP_GIANT, no need to repeat this

2008-12-12 14:03:04 +00:00

kern_tc.c

In keeping with style(9)'s recommendations on macros, use a ';'

2008-03-16 10:58:09 +00:00

kern_thr.c

Add sv_flags field to struct sysentvec with intention to provide description

2008-11-22 12:36:15 +00:00

kern_thread.c

Update ZFS from version 6 to 13 and bring some FreeBSD-specific changes.

2008-11-17 20:49:29 +00:00

kern_time.c

In realtimer_delete(), clear timer's value and interval to tell

2008-10-20 02:37:53 +00:00

kern_timeout.c

After a machine has been up for a bit more than 20 days with HZ=1000,

2008-10-28 03:26:25 +00:00

kern_umtx.c

Add two commands to _umtx_op system call to allow a simple mutex to be

2008-06-24 07:32:12 +00:00

kern_uuid.c

Rather than using hidden includes (with cicular dependencies),

2008-12-02 21:37:28 +00:00

kern_vimage.c

Conditionally compile out V_ globals while instantiating the appropriate

2008-12-10 23:12:39 +00:00

kern_xxx.c

Mark uname(), getdomainname() and setdomainname() with COMPAT_FREEBSD4.

2008-11-09 10:45:13 +00:00

ksched.c

Commit 14/14 of sched_lock decomposition.

2007-06-05 00:00:57 +00:00

link_elf_obj.c

Calling linker_load_dependencies() while holding the module'

2008-08-03 13:33:45 +00:00

link_elf.c

Calling linker_load_dependencies() while holding the module'

2008-08-03 13:33:45 +00:00

linker_if.m

Add the ctf_get method.

2008-05-23 04:06:49 +00:00

Make.tags.inc

Catch up with the disappearance of sys/dev/hfa.

2008-12-01 14:34:42 +00:00

Makefile

style.Makefile(5)

2007-12-14 21:30:51 +00:00

makesyscalls.sh

Tidy up a few things with syscall generation:

2008-09-25 20:07:42 +00:00

md4c.c

…

md5c.c

…

p1003_1b.c

Remove kernel support for M:N threading.

2008-03-12 10:12:01 +00:00

posix4_mib.c

…

sched_4bsd.c

When choosing a CPU for a thread in a cpuset, prefer the last CPU that the

2008-07-28 20:39:21 +00:00

sched_ule.c

When checking to see if another CPU is running its idle thread, examine

2008-11-18 05:41:34 +00:00

serdev_if.m

…

stack_protector.c

Fix a chicken-and-egg problem: this files implements SSP support,

2008-06-26 07:52:45 +00:00

subr_acl_posix1e.c

Rename a variable missed in previous accmode_t-related commits.

2008-10-28 21:58:48 +00:00

subr_autoconf.c

If run_interrupt_driven_config_hooks() waits 360 seconds and INVARIANTS

2008-07-21 20:50:49 +00:00

subr_blist.c

Retire the MALLOC and FREE macros. They are an abomination unto style(9).

2008-10-23 15:53:51 +00:00

subr_bufring.c

- bump __FreeBSD version to reflect added buf_ring, memory barriers,

2008-11-22 05:55:56 +00:00

subr_bus.c

Allow device hints to wire the unit numbers of devices.

2008-11-18 21:01:54 +00:00

subr_clist.c

Now that the number of clist consumers have dropped massively, trim down

2008-09-21 18:12:18 +00:00

subr_clock.c

Now that all platforms use genclock, shuffle things around slightly

2008-04-22 19:38:30 +00:00

subr_devstat.c

…

subr_disk.c

…

subr_eventhandler.c

In keeping with style(9)'s recommendations on macros, use a ';'

2008-03-16 10:58:09 +00:00

subr_fattime.c

…

subr_firmware.c

Avoid scheduling firmware taskqs when cold.

2008-11-11 12:25:08 +00:00

subr_hints.c

…

subr_kdb.c

Expand kdb_alt_break a little, most commonly used with the option

2008-05-04 23:29:38 +00:00

subr_kobj.c

…

subr_lock.c

- track maximum wait time

2008-07-27 21:45:20 +00:00

subr_log.c

In keeping with style(9)'s recommendations on macros, use a ';'

2008-03-16 10:58:09 +00:00

subr_mbpool.c

Add parens around *free in *free++ in mbp_count() so that mbp_count()

2007-05-27 17:38:36 +00:00

subr_mchain.c

Replaced the misleading uses of a historical artefact M_TRYWAIT with M_WAIT.

2008-03-25 09:39:02 +00:00

subr_module.c

…

subr_msgbuf.c

…

subr_param.c

- Detect Bochs BIOS variants and use HZ_VM as well.

2008-12-08 18:39:59 +00:00

subr_pcpu.c

Make ddb command registration dynamic so modules can extend

2008-09-15 22:45:14 +00:00

subr_power.c

…

subr_prf.c

Remove added newlines from logged messages written to /dev/console.

2008-12-10 21:48:05 +00:00

subr_prof.c

In keeping with style(9)'s recommendations on macros, use a ';'

2008-03-16 10:58:09 +00:00

subr_rman.c

Trivially avoid a null pointer dereference when drivers

2008-10-22 18:20:45 +00:00

subr_rtc.c

Now that all platforms use genclock, shuffle things around slightly

2008-04-22 19:38:30 +00:00

subr_sbuf.c

Switch to simplified BSD license (with phk's approval), plus whitespace

2008-08-09 10:26:21 +00:00

subr_scanf.c

…

subr_sleepqueue.c

Revision 184199 had not been fully reverted, add missing piece.

2008-12-01 01:54:55 +00:00

subr_smp.c

Adjust the license statement to more closely match a standard 3-clause BSD

2008-11-03 21:17:02 +00:00

subr_stack.c

Make it possible to compile kernel with KTR but without DDB.

2008-10-30 21:48:28 +00:00

subr_taskqueue.c

revert local change

2008-07-18 07:10:33 +00:00

subr_trap.c

- Bug fix: prevent a thread from migrating between CPUs between the

2008-12-13 13:07:12 +00:00

subr_turnstile.c

Make ddb command registration dynamic so modules can extend

2008-09-15 22:45:14 +00:00

subr_unit.c

Since cdev mutex is after system map mutex in global lock order, free()

2007-07-04 06:56:58 +00:00

subr_witness.c

- convert radix node head lock from mutex to rwlock

2008-12-07 21:15:43 +00:00

sys_generic.c

Reverse if() logic to improve readability.

2008-09-23 14:25:38 +00:00

sys_pipe.c

Several cleanups related to pipe(2).

2008-11-11 14:55:59 +00:00

sys_process.c

Revert rev 184216 and 184199, due to the way the thread_lock works,

2008-11-05 03:01:23 +00:00

sys_socket.c

Lock receive socket buffer in soo_stat() rather than commenting that we

2008-10-07 07:10:28 +00:00

syscalls.c

Regenerate system call tables for r184789.

2008-11-09 10:48:06 +00:00

syscalls.master

Mark uname(), getdomainname() and setdomainname() with COMPAT_FREEBSD4.

2008-11-09 10:45:13 +00:00

systrace_args.c

Regenerate system call tables for r184789.

2008-11-09 10:48:06 +00:00

sysv_ipc.c

Eliminate now-unused SUSER_ALLOWJAIL arguments to priv_check_cred(); in

2007-06-12 00:12:01 +00:00

sysv_msg.c

Merge first in a series of TrustedBSD MAC Framework KPI changes

2007-10-24 19:04:04 +00:00

sysv_sem.c

Renew semaphore's pointer after wakeup since during msleep

2008-06-19 18:08:42 +00:00

sysv_shm.c

Make sure we restrict Linux only IPC calls from being executed

2008-02-12 20:55:03 +00:00

tty_compat.c

Fix an awful bug inside our COMPAT_43TTY code.

2008-09-04 16:30:53 +00:00

tty_info.c

Integrate the new MPSAFE TTY layer to the FreeBSD operating system.

2008-08-20 08:31:58 +00:00

tty_inq.c

Fix some edge cases in the TTY queues:

2008-08-30 09:18:27 +00:00

tty_outq.c

Fix some edge cases in the TTY queues:

2008-08-30 09:18:27 +00:00

tty_pts.c

Add FIONREAD to pseudo-terminal master devices.

2008-12-13 07:23:55 +00:00

tty_pty.c

Allow the user to suppress the rate-limited pty(4) warning.

2008-08-23 16:03:00 +00:00

tty_tty.c

Remove unneeded Giant locking of /dev/tty.

2008-06-03 12:38:00 +00:00

tty_ttydisc.c

Don't forget to relock the TTY after uiomove() returns an error.

2008-11-12 09:04:44 +00:00

tty.c

Change ttyhook_register() second argument from thread to process pointer.

2008-12-13 21:17:46 +00:00

uipc_accf.c

Retire the MALLOC and FREE macros. They are an abomination unto style(9).

2008-10-23 15:53:51 +00:00

uipc_cow.c

Give MEXTADD() another argument to make both void pointers to the

2008-02-01 19:36:27 +00:00

uipc_debug.c

Change a variable name to not shadow a global

2008-07-03 08:35:59 +00:00

uipc_domain.c

In keeping with style(9)'s recommendations on macros, use a ';'

2008-03-16 10:58:09 +00:00

uipc_mbuf2.c

Merge first in a series of TrustedBSD MAC Framework KPI changes

2007-10-24 19:04:04 +00:00

uipc_mbuf.c

Remove the alignment of the align parameter. This is up to the caller to pass

2008-09-05 04:05:31 +00:00

uipc_mqueue.c

Fix matching of message queues by name.

2008-11-28 14:53:18 +00:00

uipc_sem.c

Rework the lifetime management of the kernel implementation of POSIX

2008-06-27 05:39:04 +00:00

uipc_shm.c

Shared memory objects that have size which is not necessarily equal to

2008-12-01 22:33:50 +00:00

uipc_sockbuf.c

Rewrite sbreserve_locked()'s comment on NULL thread pointers, eliminating

2008-10-07 09:51:39 +00:00

uipc_socket.c

Make sure nmbclusters are initialized before maxsockets

2008-12-10 22:17:09 +00:00

uipc_syscalls.c

Retire the MALLOC and FREE macros. They are an abomination unto style(9).

2008-10-23 15:53:51 +00:00

uipc_usrreq.c

Retire the MALLOC and FREE macros. They are an abomination unto style(9).

2008-10-23 15:53:51 +00:00

vfs_acl.c

Add the support for the AT_FDCWD and fd-relative name lookups to the

2008-03-31 12:01:21 +00:00

vfs_aio.c

- Add 32-bit compat system calls for VFS_AIO. The system calls live in the

2008-12-10 20:56:19 +00:00

vfs_bio.c

Remove the struct thread unuseful argument from bufobj interface.

2008-10-10 21:23:50 +00:00

vfs_cache.c

Add a new VOP, VOP_VPTOCNP, which translates a vnode to its component name

2008-12-12 00:57:38 +00:00

vfs_cluster.c

- Complete part of the unfinished bufobj work by consistently using

2008-03-22 09:15:16 +00:00

vfs_default.c

Add a new VOP, VOP_VPTOCNP, which translates a vnode to its component name

2008-12-12 00:57:38 +00:00

vfs_export.c

- convert radix node head lock from mutex to rwlock

2008-12-07 21:15:43 +00:00

vfs_extattr.c

Add the support for the AT_FDCWD and fd-relative name lookups to the

2008-03-31 12:01:21 +00:00

vfs_hash.c

In keeping with style(9)'s recommendations on macros, use a ';'

2008-03-16 10:58:09 +00:00

vfs_init.c

Remove VFS_VPTOFH entirely. API is already broken and it is good time to

2007-02-16 17:32:41 +00:00

vfs_lookup.c

Update ZFS from version 6 to 13 and bring some FreeBSD-specific changes.

2008-11-17 20:49:29 +00:00

vfs_mount.c

1) Fix a deadlock in the VFS:

2008-12-16 23:16:10 +00:00

vfs_subr.c

1) Fix a deadlock in the VFS:

2008-12-16 23:16:10 +00:00

vfs_syscalls.c

In the nfsrv_fhtovp(), after the vfs_getvfs() function found the pointer

2008-11-29 13:34:59 +00:00

vfs_vnops.c

Improve KASSERT() call a bit:

2008-11-29 12:40:14 +00:00

vnode_if.src

Add a new VOP, VOP_VPTOCNP, which translates a vnode to its component name

2008-12-12 00:57:38 +00:00