fail the allocation request. Allocations of "reserved" resources such as
PCI BARs already fail the request instead of panic'ing in this case.
MFC after: 1 week
Summary:
Add the beginnings of multipass suspend/resume, by introducing
BUS_SUSPEND_CHILD/BUS_RESUME_CHILD, and move the PCI driver to this.
Reviewers: jhb
Reviewed By: jhb
Differential Revision: https://reviews.freebsd.org/D590
These changes prevent sysctl(8) from returning proper output,
such as:
1) no output from sysctl(8)
2) erroneously returning ENOMEM with tools like truss(1)
or uname(1)
truss: can not get etype: Cannot allocate memory
there is an environment variable which shall initialize the SYSCTL
during early boot. This works for all SYSCTL types both statically and
dynamically created ones, except for the SYSCTL NODE type and SYSCTLs
which belong to VNETs. A new flag, CTLFLAG_NOFETCH, has been added to
be used in the case a tunable sysctl has a custom initialisation
function allowing the sysctl to still be marked as a tunable. The
kernel SYSCTL API is mostly the same, with a few exceptions for some
special operations like iterating childrens of a static/extern SYSCTL
node. This operation should probably be made into a factored out
common macro, hence some device drivers use this. The reason for
changing the SYSCTL API was the need for a SYSCTL parent OID pointer
and not only the SYSCTL parent OID list pointer in order to quickly
generate the sysctl path. The motivation behind this patch is to avoid
parameter loading cludges inside the OFED driver subsystem. Instead of
adding special code to the OFED driver subsystem to post-load tunables
into dynamically created sysctls, we generalize this in the kernel.
Other changes:
- Corrected a possibly incorrect sysctl name from "hw.cbb.intr_mask"
to "hw.pcic.intr_mask".
- Removed redundant TUNABLE statements throughout the kernel.
- Some minor code rewrites in connection to removing not needed
TUNABLE statements.
- Added a missing SYSCTL_DECL().
- Wrapped two very long lines.
- Avoid malloc()/free() inside sysctl string handling, in case it is
called to initialize a sysctl from a tunable, hence malloc()/free() is
not ready when sysctls from the sysctl dataset are registered.
- Bumped FreeBSD version to indicate SYSCTL API change.
MFC after: 2 weeks
Sponsored by: Mellanox Technologies
old devd's and thus hosts that get IP addresses from DHCP was too much
of a POLA violation.
The sysctl may be removed again after r263758 has been merged to at
least stable/9 and stable/10, and releases have been cut from those
branches.
Discussed with: mjg
Reported by: theraven, rwatson
Add a SYSINIT that forces a reseed during proc0 setup, which happens
fairly late in the boot process.
Add a RANDOM_DEBUG option which enables some debugging printf()s.
Add a new RANDOM_ATTACH entropy source which harvests entropy from the
get_cyclecount() delta across each call to a device attach method.
match devices where the driver class was fixed but the unit number was
wildcarded. This better matches the documented behaviour in
DEVICE_PROBE(9).
Reviewed by: imp
Submitted by: adrian, zec
Fix multiple kernel panics when VIMAGE is enabled in the kernel.
These fixes are based on patches submitted by Adrian Chadd and Marko Zec.
(1) Set curthread->td_vnet to vnet0 in device_probe_and_attach() just before calling
device_attach(). This fixes multiple VIMAGE related kernel panics
when trying to attach Bluetooth or USB Ethernet devices because
curthread->td_vnet is NULL.
(2) Set curthread->td_vnet in if_detach(). This fixes kernel panics when detaching networking
interfaces, especially USB Ethernet devices.
(3) Use VNET_DOMAIN_SET() in ng_btsocket.c
(4) In ng_unref_node() set curthread->td_vnet. This fixes kernel panics
when detaching Netgraph nodes.
bug where a PCI device would be powered down if it failed to probe, but
not when its driver was detached (e.g. via kldunload).
- Add a new helper method resource_list_release_active() which forcefully
releases any active resources of a specified type from a resource list.
- Add a bus_child_detached method for the PCI bus driver which forces any
active resources to be released (and whines to the console if it finds
any) and then powers the device down.
- Call pci_child_detached() if we fail to probe a device when a driver
is kldloaded. This isn't perfect but can avoid leaking resources
from a probe() routine in the kldload case.
Reviewed by: imp, brooks
MFC after: 1 month
"device_free_softc()" and "device_claim_softc()",
to allow USB serial drivers refcounting the softc.
These functions are used to grab the softc from
auto-free and to free the softc back to the correct
malloc type, respectivly.
Discussed with: jhb
MFC after: 2 weeks
allocated softc structure which is returned by
device_get_softc(). This method can be used to
easily implement softc refcounting. This can be
desirable when the softc has memory references
which are controlled by userspace handles for
example.
This solves the problem of blocking the caller
of device_detach() for a non-deterministic time.
Discussed with: kib, ed
MFC after: 2 weeks
This combination doesn't make sense, unit numbers should be hardwired
only in context of a known driver. The wildcard devices should have
wildcard unit numbers.
Reviewed by: jhb
MFC after: 2 weeks
being attached. This is implemented by adding a new DS_ATTACHING state
while a device's DEVICE_ATTACH() method is being invoked. A driver is
required to not fail an attach of a busy device. The device's state will
be promoted to DS_BUSY rather than DS_ACTIVE() if the device was marked
busy during DEVICE_ATTACH().
Reviewed by: kib
MFC after: 1 week
Descriptions are specific to drivers and we don't change drivers on attached
devices. This fixes a few places where we were not clearing the description
when detaching a driver (e.g. with device_attach() failed). While here, fix
a few other nits:
- Remove spurious call to remove a device's driver from
devclass_driver_deleted(). device_detach() removes it already.
- Fix a typo.
having dereferenced it. We either should generally check the device_t's
supplied to bus functions before using them (which we seem to virtually
never do) or just assume that they are not NULL.
While at it make this code fit 78 columns.
Found with: Coverity Prevent(tm)
CID: 4230
when actually setting a driver as especially ENOMEM is fatal in these
cases.
- Annotate other calls to device_set_devclass(9) and device_set_driver(9)
without the return value being checked and that are okay to fail.
Reviewed by: yongari (slightly earlier version)
to kern/subr_bus.c. Simplify this function so that it no longer
depends on malloc() to execute. Identify a few other places where
it makes sense to use device_delete_all_children().
MFC after: 1 week
patch modifies makesyscalls.sh to prefix all of the non-compatibility
calls (e.g. not linux_, freebsd32_) with sys_ and updates the kernel
entry points and all places in the code that use them. It also
fixes an additional name space collision between the kernel function
psignal and the libc function of the same name by renaming the kernel
psignal kern_psignal(). By introducing this change now we will ease future
MFCs that change syscalls.
Reviewed by: rwatson
Approved by: re (bz)
wrapper around rman_adjust_resource(). Include a generic implementation,
bus_generic_adjust_resource() which passes the request up to the parent
bus. There is currently no default implementation. A
bus_adjust_resource() wrapper is provided for use in drivers.
a driver during kldunload. Specifically, recursively walk the tree of
subclasses of a given driver attachment's bus device class detaching all
instances of that driver for each class and its subclasses.
Reported by: bschmidt
Reviewed by: imp
MFC after: 1 week
This reflects actual type used to store and compare child device orders.
Change is mostly done via a Coccinelle (soon to be devel/coccinelle)
semantic patch.
Verified by LINT+modules kernel builds.
Followup to: r212213
MFC after: 10 days
Also change int -> u_int for order parameter in device_add_child_ordered.
There should not be any ABI change as struct device is private to subr_bus.c
and the API change should be compatible.
To do: change int -> u_int for order parameter of bus_add_child method
and its implementations. The change should also be API compatible, but
is a bit more churn.
Suggested by: imp, jhb
MFC after: 1 week
flags to specify M_WAITOK/M_NOWAIT. M_WAITOK allows devctl to sleep for
the memory allocation.
As Warner noted, allowing the functions to sleep might cause
reordering of the queued notifications.
Reviewed by: imp, jh
MFC after: 3 weeks
