o Move the non-blocking socket test below the SBS_CANTRCVMORE so that EOF
is correctly returned on a remote connection close.
o In the non-blocking socket test compare SS_NBIO against the so->so_state
field instead of the incorrect sb->sb_state field.
o Simplify the ENOTCONN test by removing cases that can't occur.
Submitted by: trociny (with some further tweaks by committer)
Tested by: trociny
won't happen before 9.0. This commit adds "#ifdef RACCT" around all the
"PROC_LOCK(p); racct_whatever(p, ...); PROC_UNLOCK(p)" instances, in order
to avoid useless locking/unlocking in kernels built without "options RACCT".
This new version of _fget() requires new parameters:
- cap_rights_t needrights
the rights that we expect the capability's rights mask to include
(e.g. CAP_READ if we are going to read from the file)
- cap_rights_t *haverights
used to return the capability's rights mask (ignored if NULL)
- u_char *maxprotp
the maximum mmap() rights (e.g. VM_PROT_READ) that can be permitted
(only used if we are going to mmap the file; ignored if NULL)
- int fget_flags
FGET_GETCAP if we want to return the capability itself, rather than
the underlying object which it wraps
Approved by: mentor (rwatson), re (Capsicum blanket)
Sponsored by: Google Inc
cap_funwrap() and cap_funwrap_mmap() unwrap capabilities, exposing the
underlying object. Attempting to unwrap a capability with an inadequate
rights mask (e.g. calling cap_funwrap(fp, CAP_WRITE | CAP_MMAP, &result)
on a capability whose rights mask is CAP_READ | CAP_MMAP) will result in
ENOTCAPABLE.
Unwrapping a non-capability is effectively a no-op.
These functions will be used by Capsicum-aware versions of _fget(), etc.
Approved by: mentor (rwatson), re (Capsicum blanket)
Sponsored by: Google Inc
to be assigned to a non-default FIB instance.
You may need to recompile world or ports due to the change of struct ifnet.
Submitted by: cjsp
Submitted by: Alexander V. Chernikov (melifaro ipfw.ru)
(original versions)
Reviewed by: julian
Reviewed by: Alexander V. Chernikov (melifaro ipfw.ru)
MFC after: 2 weeks
X-MFC: use spare in struct ifnet
The cioctl() hook can be used by drivers to add ioctls to the *.init and
*.lock devices. This commit breaks the ttydevsw ABI, since this
structure didn't provide any padding. To prevent ABI breakage in the
future, add a tsw_spare.
Submitted by: Peter Jeremy <peter jeremy alcatel lucent com>
Obtained from: kern/152254 (slightly modified)
descriptors, we will want to allocate a new descriptor without installing
it in the FD array.
Split falloc() into falloc_noinstall() and finstall(), and rewrite
falloc() to call them with appropriate atomicity.
Approved by: mentor (rwatson), re (bz)
more explicit comments about what's going on and what future maintainers
need to do when e.g. adding a new operation to a sys_machdep.c.
Approved by: mentor(rwatson), re(bz)
option to vm_object_page_remove() asserts that the specified range of pages
is not mapped, or more precisely that none of these pages have any managed
mappings. Thus, vm_object_page_remove() need not call pmap_remove_all() on
the pages.
This change not only saves time by eliminating pointless calls to
pmap_remove_all(), but it also eliminates an inconsistency in the use of
pmap_remove_all() versus related functions, like pmap_remove_write(). It
eliminates harmless but pointless calls to pmap_remove_all() that were being
performed on PG_UNMANAGED pages.
Update all of the existing assertions on pmap_remove_all() to reflect this
change.
Reviewed by: kib
to do with global namespaces) and CAPABILITIES (which has to do with
constraining file descriptors). Just in case, and because it's a better
name anyway, let's move CAPABILITIES out of the way.
Also, change opt_capabilities.h to opt_capsicum.h; for now, this will
only hold CAPABILITY_MODE, but it will probably also hold the new
CAPABILITIES (implying constrained file descriptors) in the future.
Approved by: rwatson
Sponsored by: Google UK Ltd
... and thus retire debug.kdb.stop_cpus tunable/sysctl.
The knob was to work around CPU stopping issues, which since have been
either fixed or greatly reduced. kdb should really operate in a special
environment with scheduler stopped and interrupts disabled to provide
deterministic debugging.
Discussed with: attilio, rwatson
X-MFC after: 2 months or never
... and also increase the timeout.
It's better to try to proceed somehow despite stuck CPUs than to hang
indefinitely. Especially so during shutdown and when entering kdb or panic.
Timeout value is still an aribitrary value.
Timeout diagnostic is just a printf; the work on something more
debuggable is planned by attilio. Need to be careful here as
stop_cpus_hard is called very early while enetering kdb and soon(-ish)
it may become called very early when entering panic.
Reviewed by: attilio
MFC after: 2 months
processors unless the invariant TSC bit of CPUID is set. Intel processors
may stop incrementing TSC when DPSLP# pin is asserted, according to Intel
processor manuals, i. e., TSC timecounter is useless if the processor can
enter deep sleep state (C3/C4). This problem was accidentally uncovered by
r222869, which increased timecounter quality of P-state invariant TSC, e.g.,
for Core2 Duo T5870 (Family 6, Model f) and Atom N270 (Family 6, Model 1c).
Reported by: Fabian Keil (freebsd-listen at fabiankeil dot de)
Ian FREISLICH (ianf at clue dot co dot za)
Tested by: Fabian Keil (freebsd-listen at fabiankeil dot de)
- Core2 Duo T5870 (C3 state available/enabled)
jkim - Xeon X5150 (C3 state unavailable)
Modify the "alternate break sequence" detecting state
machine so that only a contiguous invocation of the
break sequence is accepted. The old implementation
did not reset the state machine when detecting an
unexpected character.
While here, use an enum for the states of the machine
instead of magic numbers.bmitted by:
Sponsored by: Spectra Logic Corporation
sys/kern/kern_conf.c:
Add make_dev_physpath_alias(). This interface takes
the parent cdev of the alias, an old alias cdev (if any)
to replace with the newly created alias, and the physical
path string. The alias is visiable as a symlink to the
parent, with the same name as the parent, rooted at
physpath in devfs.
Note: make_dev_physpath_alias() has hard coded knowledge of the
Solaris style prefix convention for physical path data,
"id1,". In the future, I expect the convention to change
to allow "physical path quality" to be reported in the
prefix. For example, a physical path based on NewBus
topology would be of "lower quality" than a physical path
reported by a device enclosure.
Sponsored by: Spectra Logic Corporation
device node has been created, pass MAKEDEV_CHECKNAME in so that the devfs
code will do the check.
Use a regular static variable as before, that's good enough to keep us from
calling into devfs most of the time.
Suggested by: kib
MFC after: 1 week
Sponsored by: Spectra Logic Corporation
In devstat_new_entry(), there is no need to initialize the queue
and the mutex in this function. There are ways to do static
initialization on both, so use STAILQ_HEAD_INITIALIZER and
MTX_SYSINIT to initialize the queue and the mutex.
In devstat_alloc(), use an atomic test and set routine to guard
making our entry in /dev. Using just a plain static variable
creates a race condition on multiprocessor machines. If you
attempt to create a second entry in devfs, the kernel will panic.
Submitted by: kdm
Reviewed by: gibbs
Sponsored by: Spectra Logic Corporation
MFC after: 1 week.
interleaving.
Signal dumping to happen only for the first panic which should be the
most important.
Sponsored by: Sandvine Incorporated
Submitted by: Nima Misaghian (nmisaghian AT sandvine DOT com)
MFC after: 2 weeks
Otherwise, p_bufr is set to garbage on the stack, and if that garbage
happens to be non-NULL, and the TOLOG or TOCONS flag is set, putbuf()
will get called and attempt to fill the non-existent buffer.
This is really only relevant for tprintf() (and only when the priority is
not -1), but set it in uprintf() and ttyprintf() for completeness.
The next step, to avoid log buffer scrambling, would be to add the
PRINTF_BUFR_SIZE code to tprintf(), but this should prevent panics.
Submitted by: rmacklem
Found by: pho
for it. Do not not expect a developer to call doadump(). Calling
doadump does not necessarily work when it's declared static. Nor
does it necessarily do what was intended in the context of text
dumps. The dump command always creates a core dump.
Move printing of error messages from doadump to the dump command,
now that we don't have to worry about being called from DDB.
In msgbuf_reinit() and msgbuf_init(), we weren't initializing the mutex.
Depending on the contents of memory, the LO_INITIALIZED flag might be
set on the mutex (either due to a warm reboot, and the message buffer
remaining in place, or due to garbage in memory) and in that case, with
INVARIANTS turned on, we would trigger an assertion that the mutex had
already been initialized.
Fix this by bzeroing the message buffer mutex for the _init() and _reinit()
paths.
Reported by: mdf
