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Instead of allocating a static amount of memory for the data
structures via valloc() in allocsys(), allocate things dynamically
using pool(9) when possible and malloc(9) when not. The various
members of struct seminfo and struct shminfo are in kern.seminfo
and kern.shminfo respectively (not all members of kern.seminfo are
changable).
The data structures used still leave something to be desired but
things are not made worse in that respect by this commit.
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deraadt@ ok.
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thanks to jpmp@fibertel.com.ar for the testbed. ish@ ok
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or out - this allows linux programs that use IPv6 to work (not ipv4
mapped addresses though)
- from NetBSD
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for HP-UX, FreeBSD, and Linux emulations. Note that Linux has two
versions of these system calls. One for 16bit uids and another for
32bit uids.
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thanks to jpmk@fibertel.com.ar for providing a testbed; jasoni ok.
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with not refing it.
Eyeballed by lurene@daemonkitty.net, fries@, nordin@ and fries@
Some additional cleanups by nordin@
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on the returned file, do the FREF inside getvnode so that people can't
get away with avoiding FREF and FRELE.
Eyeballed by various people.
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the time.
This could lead to problems when a process wants to do an exec on the same
vnode it's being run from and needs to copy in arguments from an uncached
page in the data segment. When that happens uvm detects a vnode deadlock
and returns an error causing execve() return EFAULT.
This fixes the regress test in regress/sys/kern/exec_self
Also, initialize scriptvp early in exec_script because it could be
used uninitialized in a failure case.
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by gustavo, several ppl ok@
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ibcs2_stat.c one OK by provos@
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an uvm aobj, copy out the signal trampoline into it and share that page
among all processes for the same emulation.
This also requires us to actually be able to tell signal code where the
trampoline is located, so introduce a new field in struct proc - p_sigcode
that is a pointer to sigcode. This allows us to remove all the ugly
calculations of the signal trampoline address done in every sendsig
function in the tree (that's why so many files are changed).
Tested by various people. ok deraadt@
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to get shared locks for lookup and get the exclusive lock only with
LK_DRAIN on unmount and do the real exclusive locking with flags in
mnt_flags, we now use shared locks for lookup and an exclusive lock for
unmount.
This is accomplished by slightly changing the semantics of vfs_busy.
Old vfs_busy behavior:
- with LK_NOWAIT set in flags, a shared lock was obtained if the
mountpoint wasn't being unmounted, otherwise we just returned an error.
- with no flags, a shared lock was obtained if the mountpoint was being
unmounted, otherwise we slept until the unmount was done and returned
an error.
LK_NOWAIT was used for sync(2) and some statistics code where it isn't really
critical that we get the correct results.
0 was used in fchdir and lookup where it's critical that we get the right
directory vnode for the filesystem root.
After this change vfs_busy keeps the same behavior for no flags and LK_NOWAIT.
But if some other flags are passed into it, they are passed directly
into lockmgr (actually LK_SLEEPFAIL is always added to those flags because
if we sleep for the lock, that means someone was holding the exclusive lock
and the exclusive lock is only held when the filesystem is being unmounted.
More changes:
dounmount must now be called with the exclusive lock held. (before this
the caller was supposed to hold the vfs_busy lock, but that wasn't always
true).
Zap some (now) unused mount flags.
And the highlight of this change:
Add some vfs_busy calls to match some vfs_unbusy calls, especially in
sys_mount. (lockmgr doesn't detect the case where we release a lock noone
holds (it will do that soon)).
If you've seen hangs on reboot with mfs this should solve it (I repeat this
for the fourth time now, but this time I spent two months fixing and
redesigning this and reading the code so this time I must have gotten
this right).
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stuff a value in retval[1] as newer linux libs puke on it.
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decriptor -> descriptor
authentciated -> authenticated
transmition -> transmission
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- from NetBSD
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Synch files that use that field.
(This argument is an internal interface specific to OpenBSD, so it won't
cause compatibility problems.)
(No bump, not an ABI change).
ok art, millert...
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they are and declarre 'em accordingly also removing private externies of those
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your kernel configuration file.
By default, GENERIC will enable this.
When PTRACE is not enabled, several ptrace-like features of the procfs
filesystem will be disabled as well (namely, the ability to read and write
any process' registers, as well as attching, single stepping and detaching
to/from processes).
This should help paranoid people build better sandboxens, and us to build
smaller ramdisks.
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They still stay in MD code for backwards compatibility, but a check in
ptrace.h checks if they are defined.
Note - the same thing will be done with PT_{GET,SET}FPREGS once vax implements
them and with PT_STEP when it's implemented by sparc, sparc64 and alpha.
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noted by pvalchev@
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- ok art@
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functions in sys/compat are left.
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