Commit Graph

6183 Commits

Author SHA1 Message Date
Mike Barcroft
fd7a8150fb o In struct prison, add an allprison linked list of prisons (protected
by allprison_mtx), a unique prison/jail identifier field, two path
  fields (pr_path for reporting and pr_root vnode instance) to store
  the chroot() point of each jail.
o Add jail_attach(2) to allow a process to bind to an existing jail.
o Add change_root() to perform the chroot operation on a specified
  vnode.
o Generalize change_dir() to accept a vnode, and move namei() calls
  to callers of change_dir().
o Add a new sysctl (security.jail.list) which is a group of
  struct xprison instances that represent a snapshot of active jails.

Reviewed by:	rwatson, tjr
2003-04-09 02:55:18 +00:00
Alan Cox
b8831f8d68 Remove some dead code. 2003-04-08 18:24:28 +00:00
Dag-Erling Smørgrav
fe58453891 Introduce an M_ASSERTPKTHDR() macro which performs the very common task
of asserting that an mbuf has a packet header.  Use it instead of hand-
rolled versions wherever applicable.

Submitted by:	Hiten Pandya <hiten@unixdaemons.com>
2003-04-08 14:25:47 +00:00
Jake Burkholder
a12efae1ea Merged from kern_thread.c 1.113, avoid a panic in cpu_throw when the first
thread of a multithreaded process exits.

This unrelated and possibly wrong change was not mentioned in the commit
message for kern_thread.c 1.113.
2003-04-08 08:13:47 +00:00
David Xu
36f7b36f8a Inherit blocked thread's context for upcall thread. 2003-04-08 07:45:56 +00:00
Peter Wemm
67db8b23c3 Search for "elf32 kernel" (and elf64) and "elf32 module" (and elf64)
as well as "elf kernel" and "elf module".  This is a precursor to
x86-64 support in the i386 loader so it can load an elf64 x86-64 kernel.
2003-04-06 05:20:00 +00:00
Alan Cox
0b556837a9 Remove an unnecessary trunc_page() from vmapbuf().
Reviewed by:	tegge
2003-04-06 00:40:54 +00:00
Alan Cox
ef38cda165 Don't reinitialize fields that are already initialized by getpbuf(). 2003-04-05 23:02:58 +00:00
Alan Cox
cdb06eda66 Sufficient access checks are performed by vmapbuf() that calling
useracc() is pointless.  Remove the call to useracc() from physio().

Reviewed by:	tegge
2003-04-05 21:19:58 +00:00
Alan Cox
06363906bc o Remove useracc() calls from aio_qphysio(); they are redundant
given the checks performed by vmapbuf().

Reviewed by:	tegge
2003-04-04 06:26:28 +00:00
Alan Cox
08468b6ad7 o Check the b_bufsize passed to vmapbuf() returning an error
if it is invalid.
 o Remove a debugging printf() from vmapbuf().

Suggested by:   tegge
2003-04-04 06:14:54 +00:00
Poul-Henning Kamp
b0fc6220b8 Remove BIO_SETATTR from non-GEOM part of kernel as well. 2003-04-03 19:22:32 +00:00
Jeff Roberson
a8949de20e - Keep seperate statistics and run queues for different scheduling classes.
- Treat each class specially in kseq_{choose,add,rem}.  Let the rest of the
   code be less aware of scheduling classes.
 - Skip the interactivity calculation for non TIMESHARE ksegrps.
 - Move slice and runq selection into kseq_add().  Uninline it now that it's
   big.
2003-04-03 00:29:28 +00:00
Peter Wemm
cc66ebe2a9 Commit a partial lazy thread switch mechanism for i386. it isn't as lazy
as it could be and can do with some more cleanup.  Currently its under
options LAZY_SWITCH.  What this does is avoid %cr3 reloads for short
context switches that do not involve another user process.  ie: we can
take an interrupt, switch to a kthread and return to the user without
explicitly flushing the tlb.  However, this isn't as exciting as it could
be, the interrupt overhead is still high and too much blocks on Giant
still.  There are some debug sysctls, for stats and for an on/off switch.

The main problem with doing this has been "what if the process that you're
running on exits while we're borrowing its address space?" - in this case
we use an IPI to give it a kick when we're about to reclaim the pmap.

Its not compiled in unless you add the LAZY_SWITCH option.  I want to fix a
few more things and get some more feedback before turning it on by default.

This is NOT a replacement for Bosko's lazy interrupt stuff.  This was more
meant for the kthread case, while his was for interrupts.  Mine helps a
little for interrupts, but his helps a lot more.

The stats are enabled with options SWTCH_OPTIM_STATS - this has been a
pseudo-option for years, I just added a bunch of stuff to it.

One non-trivial change was to select a new thread before calling
cpu_switch() in the first place.  This allows us to catch the silly
case of doing a cpu_switch() to the current process.  This happens
uncomfortably often.  This simplifies a bit of the asm code in cpu_switch
(no longer have to call choosethread() in the middle).  This has been
implemented on i386 and (thanks to jake) sparc64.  The others will come
soon.  This is actually seperate to the lazy switch stuff.

Glanced at by:  jake, jhb
2003-04-02 23:53:30 +00:00
John Baldwin
6751370f6f Lock the process before sending it a SIGIO. Not doing so is a panic(2)
implementation with INVARIANTS.
2003-04-02 21:54:51 +00:00
Jeffrey Hsu
c31548c820 Need to hold the same SMP lock for (knote) list traversal as for
list manipulation.  This lock also protects read-modify-write operations
on the pipe_state field.
2003-04-02 15:24:50 +00:00
Jeff Roberson
5053d272c2 - Make the interactivity calculator decay faster.
- Make the pcpu estimator update faster.
2003-04-02 08:22:33 +00:00
Jeff Roberson
98c9b132d1 - I meant divide by two and not shift by two in SCHED_PRI_NHALF. 2003-04-02 08:21:24 +00:00
Jake Burkholder
cef57e7624 - Make casuptr return the old value of the location we're trying to update,
and change the umtx code to expect this.

Reviewed by:	jeff
2003-04-02 08:02:27 +00:00
Jeff Roberson
245f3abfd5 - Add in support for KSEs with 0 slice values on the run queue. If we try
to select a KSE with a slice of 0 we will update its slice and insert it
   onto the next queue.
 - Pass the KSE instead of the ksegrp into sched_slice().  This more
   accurately reflects the behavior of the code.  Slices are granted to kses.
 - Add a function kseq_nice_min() which finds the smallest nice value
   assigned to the kseg of any KSE on the queue.
 - Rewrite the logic in sched_slice().  Add a large comment describing the
   new slice selection scheme.  To summarize, slices are assigned based on
   the nice value.  Priorities are still calculated based on the nice and
   interactivity of a process.  Slice sizes of 0 may be granted for KSEs
   whos nice is 20 or futher away from the lowest nice on the run queue.
   Other nice values are scaled across the range [min, min+20].  This fixes
   ULEs bad behavior with positively niced processes.
2003-04-02 06:46:43 +00:00
Jake Burkholder
fc2fca74d8 - Fix UC_COPY_SIZE. Adding up the size of structure fields doesn't take
alignment into account.
- Return EJUSTRETURN from set_context on success to avoid clobbering the
  first 2 out registers with td_retval on sparc64.
2003-04-01 23:25:18 +00:00
Poul-Henning Kamp
817509273e #include <geom/geom_disk.h> 2003-04-01 19:00:38 +00:00
Poul-Henning Kamp
af6ca7f4a9 Introduce bioq_flush() function. 2003-04-01 12:49:40 +00:00
Jeff Roberson
c9dfa2e08b - p will be unused in cursig() if INVARIANTS is not defined. Access it
through td->td_proc to avoid the unused variable.

Spotted by:	Maxim Konovalov <maxim@macomnet.ru>
2003-04-01 09:07:36 +00:00
Jeff Roberson
4518589564 - Regen. 2003-04-01 02:34:21 +00:00
Jeff Roberson
8446303e01 - thr_exit() should no longer be called with Giant held. 2003-04-01 02:32:53 +00:00
Jeff Roberson
f27bf63b8a - Mark the various thr syscalls as MP safe. Previously there was a bug if
this was not done since thr_exit() unwinds giant.
2003-04-01 02:32:07 +00:00
Jeff Roberson
2c10d16a4b - Borrow the KSE single threading code for exec and exit. We use the check
if (p->p_numthreads > 1) and not a flag because action is only necessary
   if there are other threads.  The rest of the system has no need to
   identify thr threaded processes.
 - In kern_thread.c use thr_exit1() instead of thread_exit() if P_THREADED
   is not set.
2003-04-01 01:26:20 +00:00
Jeff Roberson
8af830c374 - Regen for umtx. 2003-04-01 01:22:18 +00:00
Jeff Roberson
6eeb9653aa - Include umtx.h in files generated by makesyscalls.sh
- Add system calls for umtx.
2003-04-01 01:12:24 +00:00
Jeff Roberson
69404b5090 - Add an api for doing smp safe locks in userland.
- umtx_lock() is defined as an inline in umtx.h.  It tries to do an
   uncontested acquire of a lock which falls back to the _umtx_lock()
   system-call if that fails.
 - umtx_unlock() is also an inline which falls back to _umtx_unlock() if the
   uncontested unlock fails.
 - Locks are keyed off of the thr_id_t of the currently running thread which
   is currently just the pointer to the 'struct thread' in kernel.
 - _umtx_lock() uses the proc pointer to synchronize access to blocked thread
   queues which are stored in the first blocked thread.
2003-04-01 01:10:42 +00:00
Jeff Roberson
90e38817b7 - We now have to include umtx.h and ucontext.h in the system call related
headers.
2003-04-01 00:35:12 +00:00
Jeff Roberson
d4a63cb9c8 - Regen for thr related system calls. 2003-04-01 00:34:29 +00:00
Jeff Roberson
8d5377e538 - Add the four thr related system calls. 2003-04-01 00:31:37 +00:00
Jeff Roberson
89bb1cef1d - Add two files to support the thr threading interface.
- sys/thr.h contains the user space visible api that is intended only for
   use in threading library packages.
 - kern/kern_thr.c contains thr system calls and other thr specific code.
2003-04-01 00:30:30 +00:00
Jeff Roberson
722547925e - Regen for the sig*wait* system calls. 2003-03-31 23:33:45 +00:00
Jeff Roberson
a447cd8b28 - Define sigwait, sigtimedwait, and sigwaitinfo in terms of
kern_sigtimedwait() which is capable of supporting all of their semantics.
 - These should be POSIX compliant but more careful review is needed before
   we announce this.
2003-03-31 23:30:41 +00:00
Jeff Roberson
4093529dee - Move p->p_sigmask to td->td_sigmask. Signal masks will be per thread with
a follow on commit to kern_sig.c
 - signotify() now operates on a thread since unmasked pending signals are
   stored in the thread.
 - PS_NEEDSIGCHK moves to TDF_NEEDSIGCHK.
2003-03-31 22:49:17 +00:00
Julian Elischer
0d49bb4b30 Do NOT return from an non-interruptable cv_wait, falsely
claiming to have timed out. I don't know what I was thinking..
2003-03-31 22:41:47 +00:00
Jeff Roberson
da33176f39 - Mark signals which may be delivered to any thread in the process with
SA_PROC.  Signals without this flag should be directed to a particular
   thread if this is possible.
2003-03-31 22:12:09 +00:00
Jeff Roberson
1bf4700bff - Change trapsignal() to accept a thread and not a proc.
- Change all consumers to pass in a thread.

Right now this does not cause any functional changes but it will be important
later when signals can be delivered to specific threads.
2003-03-31 22:02:38 +00:00
Alan Cox
7be80f55ba Recent changes to uipc_cow.c have eliminated the need for some sf_buf-
related variables to be global.  Make them either local to sf_buf_init() or
static.
2003-03-31 06:25:42 +00:00
Poul-Henning Kamp
d2a0822e9d retire the "busy" field in bioqueues, it's served it's purpose. 2003-03-30 10:16:31 +00:00
Poul-Henning Kamp
d086f85ac4 Preparation commit before I start on the bioqueue lockdown:
Collect all the bits of bioqueue handing in subr_disk.c, vfs_bio.c is big
enough as it is and disksort already lives in subr_disk.c.
2003-03-30 08:51:23 +00:00
Jeff Roberson
abb0e6da6b - We are not guaranteed that read ahead blocks are not in memory already.
Check for B_DELWRI as well as B_CACHED before issuing io on a buffer.  This
   is especially important since we are changing the b_iocmd.
2003-03-30 02:57:32 +00:00
Alan Cox
9f6d45b1a4 Pass the vm_page's address to sf_buf_alloc(); map the vm_page as part
of sf_buf_alloc() instead of expecting sf_buf_alloc()'s caller to map it.

The ultimate reason for this change is to enable two optimizations:
(1) that there never be more than one sf_buf mapping a vm_page at a time
and (2) 64-bit architectures can transparently use their 1-1 virtual
to physical mapping (e.g., "K0SEG") avoiding the overhead of pmap_qenter()
and pmap_qremove().
2003-03-29 06:14:14 +00:00
Mike Silbersack
55e9f80d76 Add the m_defrag routine, as discussed on committers@. This
incarnation should address the concerns of all in the discussion,
and keeps statistics which show how much it is used.

MFC after:	2 weeks
2003-03-29 05:48:36 +00:00
John Baldwin
16088e4a88 Check for the PS_NEEDSIGCHK flag in the right flags field. 2003-03-28 18:08:57 +00:00
Mike Silbersack
df8c7fc96e Allow m_dup_pkthdr to accept mbufs with attached clusters as
targets.

Submitted by:	bmilekic
2003-03-28 05:57:48 +00:00
Ian Dowse
6205bf3107 Add a checksum to the kernel message buffer, and update it every
time a character is written. Use this at boot time to reject the
existing buffer contents if they are corrupt. This fixes a problem
seen on some hardware (especially laptops) where the message buffer
gets partially corrupted during a short power cycle or reset, but
the msgbuf structure is left intact so it gets reused, resulting
in random junk and control characters appearing in dmesg and
/var/log/messages.

PR:		kern/28497
2003-03-28 02:50:10 +00:00