9b8b170585e2959d552b0ba592b649d758b933b8 Merge branch 'drbd-8.3' into drbd-8.3-cleanups
1922274c822b34cf4b66843819ccfed97e1da4f1 Improvements to drbd_nl_net_conf()  * Removing macros  * Fixed the code for
1a59b007715215697968cfaed3f2f159d262c030 Removing a workaround for bugs in blk_queue_stack_limits() in older kernels
56d788e4fa7a4809fc41f8c17a02032fb8793080 Merge branch 'drbd-8.3' into drbd-8.3-cleanups
a95b4cfb595ced59ca6d2b26d450fd7e5e08fec8 The coding style guide says: Constants are ALL_CAPS
84cc8259557954b39fa8b0c57931b08cdc3df3f6 Merge branch 'drbd-8.2' into drbd-8.3
555b9f742cce70430a5769a35128ee3fa06fa9f4 Merge branch 'drbd-8.0' into drbd-8.2
f96e2776b2e49ef992d43a624d7c6be7d0610bfa Removing CamelCase from structs, enums and unions
727aca1fcc001381ab6f0a7229fa7db54b9431ea Removing '#if 0' code
546cbdec6779e997a37eac0d3762f4e0a3a390f2 Changing the remaining constants to UPPER_CASE only
57e478a0d328405ed97c3bada9d617e5d21a3868 Merge branch 'drbd-8.3' into drbd-8.3-cleanups
23b99bfb4ceca5a00c180620ac3f6db91edf7f85 Andi does not want to get it CC, he prefers to pick it off LKML
d362ab639c966107670f4b375cbff757314f5cba Changing the remaining constants to UPPER_CASE only
6fe98c4f0302a28174dd3a852e72fbc6a0caa45e Merge branch 'drbd-8.2' into drbd-8.3
ff327744475ffc66795fc49dcdc232b21589185e Changing the remaining constants to UPPER_CASE only
185392bf5ce63936a5c424b97e38512ab4bcfdb7 Merge branch 'drbd-8.0' into drbd-8.2
5f87618f7272e9ef92b17b2b7c36dcc1c3d59031 Making all constants UPPER_CASE only
2ebf5224634bf5fda709fb54b43a5de6e3c10bee Adding explicit numbers to the return codes to user space
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

 * Moving BUG_ON() as suggested by Nikanth Karthikesan
 * Removing our ERR, drbd_WARN, INFO, ALERT macros, using the kernel standard dev_err, dev_warn etc.. instead
   suggested by Bart Van Assche
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

782b1ed1e3582393381e1f3f1cb80020f027ca06 Merge branch 'drbd-8.0' into drbd-8.3
80de0d362ffd9906412ce7b602db7c9cd550b678 Adjusted the drbd_congested() function to work on kernels >= 2.6.30
f484da549b3375ef7e7d9d08d5bf2c95745c8eaa Correct exapnsion of "device minor %d" statements for upper resources.
4cecefe99336e911425e390f115cf32a9036679f Fixed the res_by_minor() function
10d77c7a0d08257a19f8d67fdda3af71bf415b1d Do not do state changes on unconfigured devices (bugz 214)
706b35dc7ada32cf9cc47d331733514a52c5a820 double :: typo
3ced685cd6ae4179d77e09945a4951f4c997d2db Merge branch 'drbd-8.2' into drbd-8.3
70339fe8d52ee93696aa975b9ed14cbaa61d0e0c Merge branch 'drbd-8.0' into drbd-8.2
864141476a52d5e174dcbb03fa9f98b6da6f9689 Fixing the error code path in case the bitmap allocation failes.
8126b2adf618924c1d00407bd56b8b4f3976e198 Fault injection for the bitmap allocation
c091e4513f805f9a2118f01ee87e6ec7a419126a proc/drbd: catch uninitialized congestion flag
d30881451c988619e243d6294a899139eed1183d Preparing 8.0.16
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

Kconfig integration, Makefile and major.h
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

buildtag.c tag will go away when we are not longer an external module.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

Encoding of our simple LRE compression scheme. It is very effective since
large parts of our bitmap are sparse.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

Our generic worker thread. Does the actual sending of data via the network
link. Does all the after-state-change activities, that have to be done
without holding the req_lock spinlock. And some other stuff.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

The /proc/drbd interface.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

Nearly everything of the "receiver" and the "asender" is in this file. The
receiver is the thread that processes all data packets. The receiver might
gets blocked while waiting for memory or being slowed while submitting IO.
  The asender on the other hand is used to send out acknowledgements and
to receive them. It only blocks while waiting on its socket.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

The DRBD state engine, and lots of other stuff, that does not have its own
source file.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

The big "struct drbd_conf". It actually describes one DRBD device.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

DRBD uses netlink via connector. The packets are composed of extensible tag
lists. That interface can be extended over time without breaking old
userspace programs.
The nice part of the interface to userspace: drbd.h. The ugly part is for
sure drbd_tag_magic.h. I realize that macros are generally frowned upon, but
this way it is easier to maintain. The code that gets generated by
repeatedly including drbd_nl.h is hard to maintain over time if it is open
coded. (BTW, did you know that the samba 4 people are proud to have more
than 50% of their code auto generated:)
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

The request state engine.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

DRBD maintains a dirty bitmap in case it has to run without peer node or
without local disk. Writes to the on disk dirty bitmap are minimized by the
activity log (=AL). Each time an extent is evicted from the AL the part of
the bitmap no longer covered by the AL is written to disk.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

Within DRBD the activity log is used to track extents (4MB each) in which IO
happens (or happened recently). It is based on the LRU cache. Each change of
the activity log causes a meta data update (single sector write).  The size
of the activity log is configured by the user, and is a tradeoff between
minimizing updates to the meta data and the resync time after the crash of a
primary node.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

The lru_cache is a fixed size cache of equal sized objects. It allows its
users to do arbitrary transactions in case an element in the cache needs to
be replaced. Its replacement policy is LRU.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  work_on_cpu(): rewrite it to create a kernel thread on demand
  kthread: move sched-realeted initialization from kthreadd context
  kthread: Don't looking for a task in create_kthread() #2

* git://git.infradead.org/battery-2.6:
  pda_power: Add optional OTG transceiver and voltage regulator support
  pcf50633_charger: Remove unused mbc_set_status function
  pcf50633_charger: Enable periodic charging restart

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
  cap_prctl: don't set error to 0 at 'no_change'

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
  igb: remove sysfs entry that was used to set the number of vfs
  igbvf: add new driver to support 82576 virtual functions
  drivers/net/eql.c: Fix a dev leakage.
  niu: Fix unused variable warning.
  r6040: set MODULE_VERSION
  bnx2: Don't use reserved names
  FEC driver: add missing #endif
  niu: Fix error handling
  mv643xx_eth: don't reset the rx coal timer on interface up
  smsc911x: correct debugging message on mii read timeout
  ethoc: fix library build errors
  netfilter: ctnetlink: fix regression in expectation handling
  netfilter: fix selection of "LED" target in netfilter
  netfilter: ip6tables regression fix

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc: Hook up sys_preadv and sys_pwritev
  sparc64: add_node_ranges() must be __init
  serial: sunsu: sunsu_kbd_ms_init needs to be __devinit
  sparc: Fix section mismatch warnings in cs4231 sound driver.
  sparc64: Fix section mismatch warnings in PCI controller drivers.
  sparc64: Fix section mismatch warnings in power driver.
  sparc64: get_cells() can't be marked __init

* 'ext3-latency-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext3: Try to avoid starting a transaction in writepage for data=writepage
  block_write_full_page: switch synchronous writes to use WRITE_SYNC_PLUG

Impact: circular locking bugfix

The various implemetnations and proposed implemetnations of work_on_cpu()
are vulnerable to various deadlocks because they all used queues of some
form.

Unrelated pieces of kernel code thus gained dependencies wherein if one
work_on_cpu() caller holds a lock which some other work_on_cpu() callback
also takes, the kernel could rarely deadlock.

Fix this by creating a short-lived kernel thread for each work_on_cpu()
invokation.

This is not terribly fast, but the only current caller of work_on_cpu() is
pci_call_probe().

It would be nice to find some other way of doing the node-local
allocations in the PCI probe code so that we can zap work_on_cpu()
altogether.  The code there is rather nasty.  I can't think of anything
simple at this time...

Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

kthreadd is the single thread which implements ths "create" request, move
sched_setscheduler/etc from create_kthread() to kthread_create() to
improve the scalability.

We should be careful with sched_setscheduler(), use _nochek helper.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Vitaliy Gusev <vgusev@openvz.org
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Remove the unnecessary find_task_by_pid_ns(). kthread() can just
use "current" to get the same result.
Signed-off-by: Vitaliy Gusev <vgusev@openvz.org>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

One-liner: capsh --print is broken without this patch.

In certain cases, cap_prctl returns error > 0 for success.  However,
the 'no_change' label was always setting error to 0.  As a result,
for example, 'prctl(CAP_BSET_READ, N)' would always return 0.
It should return 1 if a process has N in its bounding set (as
by default it does).

I'm keeping the no_change label even though it's now functionally
the same as 'error'.
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>

This patch removes the sysfs entry num_vfs which was added to support
enabling pci virtual functions for 82576.

To prevent VFs from loading automatically a module parameter "max_vfs" was
added so that the number of VFs per PF can be limited.  This is especially
useful when 4 or more 82576 ports are on the system because otherwise to
load all VFs would result in 8 interface per physical port.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This adds an igbvf driver to handle virtual functions provided by the
igb driver when SR-IOV has been enabled.  A virtual function is a
lightweight pci-e function that supports a single queue and shares
resources with the 82576 physical function contained within the igb
driver.

To spawn virtual functions from the igb driver all that is needed is to
enable CONFIG_PCI_IOV and have an 82576 Ethernet adapter on a system that
supports SR-IOV in the BIOS.  The virtual functions will appear after the
interface is loaded.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

After dev_get_by_name(), we should follow a dev_put().
Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Don't strain gcc's tiny mind.
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch sets MODULE_VERSION in order to help users track
changes to this module.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

The mips identifier is reserved by gcc on mips plattforms. Don't use it
in the code.
Signed-off-by: Bastian Blank <waldi@debian.org>
Tested-by: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

platform_device_register_simple() returns ERR_PTR(), not NULL, if an error 
occurs.

Found by smatch (http://repo.or.cz/w/smatch.git).  Compile tested.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Move SDMA configuration from interface up to port probe, to prevent
overwriting the receive coalescing timer value on interface up.
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

the warning printed when a mii READ times out currently says "Timed out
waiting for MII write to finish".  This patch corrects this.
Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>