Some kernel threads try to do significant work, and the default KSTACK_PAGES
doesn't give them enough stack to do much before blowing away the pcb.
This adds MI and MD code to allow the allocation of

Some kernel threads try to do significant work, and the default KSTACK_PAGES
doesn't give them enough stack to do much before blowing away the pcb.
This adds MI and MD code to allow the allocation of an alternate kstack
who's size can be speficied when calling kthread_create. Passing the
value 0 prevents the alternate kstack from being created. Note that the
ia64 MD code is missing for now, and PowerPC was only partially written
due to the pmap.c being incomplete there.
Though this patch does not modify anything to make use of the alternate
kstack, acpi and usb are good candidates.

Reviewed by: jake, peter, jhb

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The AAC_COMPAT_LINUX option was really annoying, since it made the
aac driver dependent on the linux emulation module. This was
especially bad for the release engineers who tried to move the
aac dri

The AAC_COMPAT_LINUX option was really annoying, since it made the
aac driver dependent on the linux emulation module. This was
especially bad for the release engineers who tried to move the
aac driver from the kernel onto the drivers floppy. The linux
compat bits for this driver are now in their own driver, aac_linux.
It can be loaded as a module or compiled into the kernel. For
the latter case, the AAC_COMPAT_LINUX option is needed, along with
the COMPAT_LINUX option.

I've tested this in every configuration I can think of. This is an
MFC candidate for 4.7.

Idea from: rwatson
MFC after: 3 days

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The aac driver needs 256K of contiguous physical memory in order to
attach. If it can't get that (highly likely if loaded as a module on
a system that's been up for a while), give a more descriptive

The aac driver needs 256K of contiguous physical memory in order to
attach. If it can't get that (highly likely if loaded as a module on
a system that's been up for a while), give a more descriptive error
message.
Also clean up some nearby style nits.

MFC after: 2 days

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In continuation of early fileop credential changes, modify fo_ioctl() to
accept an 'active_cred' argument reflecting the credential of the thread
initiating the ioctl operation.

- Change fo_ioctl()

In continuation of early fileop credential changes, modify fo_ioctl() to
accept an 'active_cred' argument reflecting the credential of the thread
initiating the ioctl operation.

- Change fo_ioctl() to accept active_cred; change consumers of the
fo_ioctl() interface to generally pass active_cred from td->td_ucred.
- In fifofs, initialize filetmp.f_cred to ap->a_cred so that the
invocations of soo_ioctl() are provided access to the calling f_cred.
Pass ap->a_td->td_ucred as the active_cred, but note that this is
required because we don't yet distinguish file_cred and active_cred
in invoking VOP's.
- Update kqueue_ioctl() for its new argument.
- Update pipe_ioctl() for its new argument, pass active_cred rather
than td_ucred to MAC for authorization.
- Update soo_ioctl() for its new argument.
- Update vn_ioctl() for its new argument, use active_cred rather than
td->td_ucred to authorize VOP_IOCTL() and the associated VOP_GETATTR().

Obtained from: TrustedBSD Project
Sponsored by: DARPA, NAI Labs

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bzero out the sync command buffer when sending commands. This was causing
problems when enumerating multiple arrays.

This is an MFC candidate.

Add a CAM interface to the aac driver. This is useful in case you should
ever connect a SCSI Cdrom/Tape/Jukebox/Scanner/Printer/kitty-litter-scooper
to your high-end RAID controller. The interface

Add a CAM interface to the aac driver. This is useful in case you should
ever connect a SCSI Cdrom/Tape/Jukebox/Scanner/Printer/kitty-litter-scooper
to your high-end RAID controller. The interface to the arrays is still
via the block interface; this merely provides a way to circumvent the
RAID functionality and access the SCSI buses directly. Note that for
somewhat obvious reasons, hard drives are not exposed to the da driver
through this interface, though you can still talk to them via the pass
driver. Be the first on your block to low-level format unsuspecting
drives that are part of an array!

To enable this, add the 'aacp' device to your kernel config.

MFC after: 3 days

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Prepare for a major update to the aac driver:
Update the aac driver with the new crashdump api.
Protect sync fibs with a mutex.
Align all DMA buffers on a PAGE_SIZE boundary.

MFC after: 3 days

Don't attach to Dell PERC2/QC cards that have a firmware rev of 1.x. This
check is complicated by the fact that the Adaptec 5400S cards claim to use
1.x firmware also. PERC2/QC 1.x firmware is not

Don't attach to Dell PERC2/QC cards that have a firmware rev of 1.x. This
check is complicated by the fact that the Adaptec 5400S cards claim to use
1.x firmware also. PERC2/QC 1.x firmware is not compatible with this driver
and will cause a system hang.

MFC after: 3 days

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Replace ffind_* with fget calls.

Make fget MPsafe.

Make fgetvp and fgetsock use the fget subsystem to reduce code bloat.

Push giant down in fpathconf().

Include sys/_lock.h and sys/_mutex.h to reduce namespace pollution.

Requested by: jhb

SMP Lock struct file, filedesc and the global file list.

Seigo Tanimura (tanimura) posted the initial delta.

I've polished it quite a bit reducing the need for locking and
adapting it for KSE.

Loc

SMP Lock struct file, filedesc and the global file list.

Seigo Tanimura (tanimura) posted the initial delta.

I've polished it quite a bit reducing the need for locking and
adapting it for KSE.

Locks:

1 mutex in each filedesc
protects all the fields.
protects "struct file" initialization, while a struct file
is being changed from &badfileops -> &pipeops or something
the filedesc should be locked.

1 mutex in each struct file
protects the refcount fields.
doesn't protect anything else.
the flags used for garbage collection have been moved to
f_gcflag which was the FILLER short, this doesn't need
locking because the garbage collection is a single threaded
container.
could likely be made to use a pool mutex.

1 sx lock for the global filelist.

struct file * fhold(struct file *fp);
/* increments reference count on a file */

struct file * fhold_locked(struct file *fp);
/* like fhold but expects file to locked */

struct file * ffind_hold(struct thread *, int fd);
/* finds the struct file in thread, adds one reference and
returns it unlocked */

struct file * ffind_lock(struct thread *, int fd);
/* ffind_hold, but returns file locked */

I still have to smp-safe the fget cruft, I'll get to that asap.

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Staticise the aac devclass.

Use d_thread_t to reduce diffs between current and stable.
Spell ACQUIRE correctly.

Add functionality and fix bugs so the driver will work with soon-to-be
released management apps.

1. Implement poll(). This will check for queued aif's so that a
subsequent ioctl call to retrie

Add functionality and fix bugs so the driver will work with soon-to-be
released management apps.

1. Implement poll(). This will check for queued aif's so that a
subsequent ioctl call to retrieve the next aif will not block.
2. Don't catch signals when sleeping on a fib sent from userland. This
causes a race and panic due to the pthread context switcher waking
up the tsleep at inopportune times.
3. Fix some whitespace nits.

MFC after: 3 days

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- Change the taskqueue locking to protect the necessary parts of a task
while it is on a queue with the queue lock and remove the per-task locks.
- Remove TASK_DESTROY now that it is no longer need

- Change the taskqueue locking to protect the necessary parts of a task
while it is on a queue with the queue lock and remove the per-task locks.
- Remove TASK_DESTROY now that it is no longer needed.
- Go back to inlining TASK_INIT now that it is short again.

Inspired by: dfr

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Add locking to taskqueues. There is one mutex per task, one mutex per
queue, and a mutex to protect the global list of taskqueues. The only
visible change is that a TASK_DESTROY() macro has been ad

Add locking to taskqueues. There is one mutex per task, one mutex per
queue, and a mutex to protect the global list of taskqueues. The only
visible change is that a TASK_DESTROY() macro has been added to mirror
the TASK_INIT() macro to destroy a task before it is free'd.

Submitted by: Andrew Reiter <awr@watson.org>

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KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is fu

KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after: ha ha ha ha

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Bring the aac driver *much* closer to style(9).

Reviewed by: ken

Sigh. There are actually two ioctls ranges that need to be watched on the
linux side. This will all be over soon...

Restrict the range of linux ioctls we will accept.

Doh! Fix a comma that disappeared along the way.

Pointy-hat by: peter

Mega update to the aac driver.
1. Correctly handle commands initiated by the adapter. These commands
are defered to a kthread responsible for their processing, then are
properly returned to

Mega update to the aac driver.
1. Correctly handle commands initiated by the adapter. These commands
are defered to a kthread responsible for their processing, then are
properly returned to the controller.
2. Add/remove disk devices when notified by the card that a container was
created/deleted/offline.
3. Implement crashdump functionality.
4. Support all ioctls needed for the management CLI to work. The linux
version of this app can be found at the Dell or HP website. A native
version will be forthcoming.

MFC-after: 4.4-RELEASE

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Adding missing () in a KASSERT format string.

Submitted by: brandt@fokus.gmd.de

Put the linux compat ioctl interface on death row. Add FreeBSD
definitions of all of the ioctls, plus round out all ioctl definitions to
match what exists for linux. Allow ioctls to be called throu

Put the linux compat ioctl interface on death row. Add FreeBSD
definitions of all of the ioctls, plus round out all ioctl definitions to
match what exists for linux. Allow ioctls to be called through either the
native or linux interface, though no apps exist (yet) that can take
advantage of native calling.

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Once again throw out the calculation of si_iosize_max and set it to 64K.
Although it can go higher, it is not safe to so do on arrays with many
members. Compromise by adding a tunable, "hw.aac.iosiz

Once again throw out the calculation of si_iosize_max and set it to 64K.
Although it can go higher, it is not safe to so do on arrays with many
members. Compromise by adding a tunable, "hw.aac.iosize_max" that can be
set at boottime. Also document in the aac(4) manpage.

MFC after: 4 weeks

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