platform/kernel/linux-rpi.git
7 years agonvme: use ida_simple_{get,remove} for the controller instance
Christoph Hellwig [Wed, 18 Oct 2017 11:10:01 +0000 (13:10 +0200)]
nvme: use ida_simple_{get,remove} for the controller instance

Switch to the ida_simple_* helpers instead of opencoding them.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
7 years agonvmet: Change max_nsid in subsystem due to ns_disable if needed
Roy Shterman [Wed, 18 Oct 2017 10:46:07 +0000 (13:46 +0300)]
nvmet: Change max_nsid in subsystem due to ns_disable if needed

In case we disable namespaces which has the nsid like
subsystem max_nsid we need to search for the next largest nsid
in this subsystem. If the subsystem don't has more namespaces
we set it to 0, else we take nsid from the last namespace in
namespaces list because the list is sorted while inserting.

Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Roy Shterman <roys@lightbitslabs.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
[hch: slight refactor]
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme-loop: Add BLK_MQ_F_NO_SCHED flag to admin tag set
Israel Rukshin [Wed, 18 Oct 2017 12:38:26 +0000 (12:38 +0000)]
nvme-loop: Add BLK_MQ_F_NO_SCHED flag to admin tag set

This flag is useful for admin queues that aren't used for normal IO.

Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme-fc: Add BLK_MQ_F_NO_SCHED flag to admin tag set
Israel Rukshin [Wed, 18 Oct 2017 12:38:25 +0000 (12:38 +0000)]
nvme-fc: Add BLK_MQ_F_NO_SCHED flag to admin tag set

Since commit b86dd81
"block: get rid of blk-mq default scheduler choice Kconfig entries",
when setting nr_hw_queues to 1 the admin tag set uses mq-deadline scheduler.
This flag is useful for admin queues that aren't used for normal IO.

Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme-rdma: Add BLK_MQ_F_NO_SCHED flag to admin tag set
Israel Rukshin [Wed, 18 Oct 2017 12:38:24 +0000 (12:38 +0000)]
nvme-rdma: Add BLK_MQ_F_NO_SCHED flag to admin tag set

Since commit b86dd81
"block: get rid of blk-mq default scheduler choice Kconfig entries",
when setting nr_hw_queues to 1 the admin tag set uses mq-deadline scheduler.
This flag is useful for admin queues that aren't used for normal IO.

Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme-pci: fix typos in comments
Minwoo Im [Wed, 18 Oct 2017 13:56:09 +0000 (22:56 +0900)]
nvme-pci: fix typos in comments

fixed comment typos in adapter_alloc_cq() and adapter_alloc_sq().
'the the' duplications are replaced with 'that the'.

Signed-off-by: Minwoo Im <dn3108@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme-rdma: stop controller reset if the controller is deleting
Sagi Grimberg [Wed, 11 Oct 2017 09:49:51 +0000 (12:49 +0300)]
nvme-rdma: stop controller reset if the controller is deleting

If the controller is deleting (in case the user decided to delete it), we
have no point to continue reset sequence.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme-rdma: change queue flag semantics DELETING -> ALLOCATED
Sagi Grimberg [Wed, 11 Oct 2017 12:29:12 +0000 (15:29 +0300)]
nvme-rdma: change queue flag semantics DELETING -> ALLOCATED

Instead of marking we are deleting, mark we are allocated and check that
instead. This makes the logic symmetrical to connected mark check.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme-rdma: Don't local invalidate if the queue is not live
Sagi Grimberg [Wed, 11 Oct 2017 12:29:10 +0000 (15:29 +0300)]
nvme-rdma: Don't local invalidate if the queue is not live

No chance for the local invalidate to succeed if the queue-pair
is in error state. Most likely the target will do a remote
invalidation of our mr so not a big loss on the test_bit.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme-rdma: teardown admin/io queues once on error recovery
Sagi Grimberg [Wed, 11 Oct 2017 12:29:11 +0000 (15:29 +0300)]
nvme-rdma: teardown admin/io queues once on error recovery

Relying on the queue state while tearing down on every reconnect
attempt is not a good design. We should do it once in err_work
and simply try to establish the queues for each reconnect attempt.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme-rdma: Check that reinit_request got a proper mr
Sagi Grimberg [Wed, 11 Oct 2017 12:29:09 +0000 (15:29 +0300)]
nvme-rdma: Check that reinit_request got a proper mr

Warn if req->mr is NULL as it should never happen.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme-rdma: move assignment to declaration
Sagi Grimberg [Wed, 11 Oct 2017 12:29:08 +0000 (15:29 +0300)]
nvme-rdma: move assignment to declaration

No need for the extra line for trivial assignments.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme-rdma: fix wrong logging message
Sagi Grimberg [Wed, 11 Oct 2017 12:29:07 +0000 (15:29 +0300)]
nvme-rdma: fix wrong logging message

Not necessarily address resolution failed.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme-rdma: pass tagset to directly nvme_rdma_free_tagset
Sagi Grimberg [Wed, 11 Oct 2017 12:29:06 +0000 (15:29 +0300)]
nvme-rdma: pass tagset to directly nvme_rdma_free_tagset

Instead of flagging admin/io.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agoblock: remove blk_mq_reinit_tagset
Sagi Grimberg [Wed, 11 Oct 2017 09:53:08 +0000 (12:53 +0300)]
block: remove blk_mq_reinit_tagset

No callers left.

Reviewed-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme: introduce nvme_reinit_tagset
Sagi Grimberg [Wed, 11 Oct 2017 09:53:07 +0000 (12:53 +0300)]
nvme: introduce nvme_reinit_tagset

Move blk_mq_reinit_tagset from blk-mq to nvme core
as the only user of it. Current transports that use
it (rdma, fc) simply implement .reinit_request op.

This patch does not change any functionality.

Reviewed-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agoblock: introduce blk_mq_tagset_iter
Sagi Grimberg [Wed, 11 Oct 2017 09:53:06 +0000 (12:53 +0300)]
block: introduce blk_mq_tagset_iter

Iterator helper to apply a function on all the
tags in a given tagset. export it as it will be used
outside the block layer later on.

Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme: simplify compat_ioctl handling
Christoph Hellwig [Thu, 5 Oct 2017 16:46:46 +0000 (18:46 +0200)]
nvme: simplify compat_ioctl handling

We can just use our normal ioctl handler for the compat case and remove
the boilerplate code for it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
7 years agonvme-fc: move remote port get/put/free location
James Smart [Wed, 27 Sep 2017 04:50:45 +0000 (21:50 -0700)]
nvme-fc: move remote port get/put/free location

move nvme_fc_rport_get/put and rport free to higher in the file to
avoid adding prototypes to resolve references in upcoming code additions

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme-fc: create fc class and transport device
James Smart [Thu, 14 Sep 2017 17:38:41 +0000 (10:38 -0700)]
nvme-fc: create fc class and transport device

Added a new fc class and a device node for udev events under it.  I
expect the fc class will eventually be the location where the FC SCSI and
FC NVME merge in the future. Therefore names are kept somewhat generic.

Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme-fc: add uevent for auto-connect
James Smart [Thu, 14 Sep 2017 17:38:42 +0000 (10:38 -0700)]
nvme-fc: add uevent for auto-connect

To support auto-connecting to FC-NVME devices upon their dynamic
appearance, add a uevent that can kick off connection scripts.
uevent is posted against the fc_udev device.

patch set tested with the following rule to kick an nvme-cli connect-all
for the FC initiator and FC target ports. This is just an example for
testing and not intended for real life use.

ACTION=="change", SUBSYSTEM=="fc", ENV{FC_EVENT}=="nvmediscovery", \
        ENV{NVMEFC_HOST_TRADDR}=="*", ENV{NVMEFC_TRADDR}=="*", \
RUN+="/bin/sh -c '/usr/local/sbin/nvme connect-all --transport=fc --host-traddr=$env{NVMEFC_HOST_TRADDR} --traddr=$env{NVMEFC_TRADDR} >> /tmp/nvme_fc.log'"

I will post proposed udev/systemd scripts for possible kernel support.

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme-fabrics: request transport module
Sagi Grimberg [Sun, 24 Sep 2017 13:15:55 +0000 (16:15 +0300)]
nvme-fabrics: request transport module

Help userspace to make sure transport module is loaded.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvmet: bump NVMET_NR_QUEUES to 128
James Smart [Mon, 11 Sep 2017 23:14:50 +0000 (16:14 -0700)]
nvmet: bump NVMET_NR_QUEUES to 128

Raise the max number of IO queues to 128. There are several hosts with
more than 64 cpus/threads.

Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme: use menu Kconfig interface
Randy Dunlap [Sat, 23 Sep 2017 01:04:43 +0000 (18:04 -0700)]
nvme: use menu Kconfig interface

Add a menu interface for NVME host and target support so that it is
presented to users more like other Kconfig symbols.
This makes the Device Driver menu less cluttered (easier to read)
and keeps all of these symbols grouped together.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agonvme: update timeout module parameter type
Marc Olson [Thu, 7 Sep 2017 00:23:56 +0000 (17:23 -0700)]
nvme: update timeout module parameter type

The underlying blk_mq_tag_set, and request timeout parameters support an
unsigned int. Extend the size of the nvme module parameters for io and
admin commands to match.

Signed-off-by: Marc Olson <marcolso@amazon.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
7 years agoblock: move __elv_next_request to blk-core.c
Christoph Hellwig [Tue, 3 Oct 2017 08:47:00 +0000 (10:47 +0200)]
block: move __elv_next_request to blk-core.c

No need to have this helper inline in a header.  Also drop the __ prefix.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoblock, bfq: decrease burst size when queues in burst exit
Paolo Valente [Thu, 21 Sep 2017 09:04:03 +0000 (11:04 +0200)]
block, bfq: decrease burst size when queues in burst exit

If many queues belonging to the same group happen to be created
shortly after each other, then the concurrent processes associated
with these queues have typically a common goal, and they get it done
as soon as possible if not hampered by device idling.  Examples are
processes spawned by git grep, or by systemd during boot. As for
device idling, this mechanism is currently necessary for weight
raising to succeed in its goal: privileging I/O.  In view of these
facts, BFQ does not provide the above queues with either weight
raising or device idling.

On the other hand, a burst of queue creations may be caused also by
the start-up of a complex application. In this case, these queues need
usually to be served one after the other, and as quickly as possible,
to maximise responsiveness. Therefore, in this case the best strategy
is to weight-raise all the queues created during the burst, i.e., the
exact opposite of the strategy for the above case.

To distinguish between the two cases, BFQ uses an empirical burst-size
threshold, found through extensive tests and monitoring of daily
usage. Only large bursts, i.e., burst with a size above this
threshold, are considered as generated by a high number of parallel
processes. In this respect, upstart-based boot proved to be rather
hard to detect as generating a large burst of queue creations, because
with upstart most of the queues created in a burst exit *before* the
next queues in the same burst are created. To address this issue, I
changed the burst-detection mechanism so as to not decrease the size
of the current burst even if one of the queues in the burst is
eliminated.

Unfortunately, this missing decrease causes false positives on very
fast systems: on the start-up of a complex application, such as
libreoffice writer, so many queues are created, served and exited
shortly after each other, that a large burst of queue creations is
wrongly detected as occurring. These false positives just disappear if
the size of a burst is decreased when one of the queues in the burst
exits. This commit restores the missing burst-size decrease, relying
of the fact that upstart is apparently unlikely to be used on systems
running this and future versions of the kernel.

Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Mauro Andreolini <mauro.andreolini@unimore.it>
Signed-off-by: Angelo Ruocco <angeloruocco90@gmail.com>
Tested-by: Mirko Montanari <mirkomontanari91@gmail.com>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Tested-by: Lee Tibbert <lee.tibbert@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoblock, bfq: let early-merged queues be weight-raised on split too
Paolo Valente [Thu, 21 Sep 2017 09:04:02 +0000 (11:04 +0200)]
block, bfq: let early-merged queues be weight-raised on split too

A just-created bfq_queue, say Q, may happen to be merged with another
bfq_queue on the very first invocation of the function
__bfq_insert_request. In such a case, even if Q would clearly deserve
interactive weight raising (as it has just been created), the function
bfq_add_request does not make it to be invoked for Q, and thus to
activate weight raising for Q. As a consequence, when the state of Q
is saved for a possible future restore, after a split of Q from the
other bfq_queue(s), such a state happens to be (unjustly)
non-weight-raised. Then the bfq_queue will not enjoy any weight
raising on the split, even if should still be in an interactive
weight-raising period when the split occurs.

This commit solves this problem as follows, for a just-created
bfq_queue that is being early-merged: it stores directly, in the saved
state of the bfq_queue, the weight-raising state that would have been
assigned to the bfq_queue if not early-merged.

Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Tested-by: Angelo Ruocco <angeloruocco90@gmail.com>
Tested-by: Mirko Montanari <mirkomontanari91@gmail.com>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Tested-by: Lee Tibbert <lee.tibbert@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoblock, bfq: check and switch back to interactive wr also on queue split
Paolo Valente [Thu, 21 Sep 2017 09:04:01 +0000 (11:04 +0200)]
block, bfq: check and switch back to interactive wr also on queue split

As already explained in the message of commit "block, bfq: fix
wrong init of saved start time for weight raising", if a soft
real-time weight-raising period happens to be nested in a larger
interactive weight-raising period, then BFQ restores the interactive
weight raising at the end of the soft real-time weight raising. In
particular, BFQ checks whether the latter has ended only on request
dispatches.

Unfortunately, the above scheme fails to restore interactive weight
raising in the following corner case: if a bfq_queue, say Q,
1) Is merged with another bfq_queue while it is in a nested soft
real-time weight-raising period. The weight-raising state of Q is
then saved, and not considered any longer until a split occurs.
2) Is split from the other bfq_queue(s) at a time instant when its
soft real-time weight raising is already finished.
On the split, while resuming the previous, soft real-time
weight-raised state of the bfq_queue Q, BFQ checks whether the
current soft real-time weight-raising period is actually over. If so,
BFQ switches weight raising off for Q, *without* checking whether the
soft real-time period was actually nested in a non-yet-finished
interactive weight-raising period.

This commit addresses this issue by adding the above missing check in
bfq_queue splits, and restoring interactive weight raising if needed.

Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Tested-by: Angelo Ruocco <angeloruocco90@gmail.com>
Tested-by: Mirko Montanari <mirkomontanari91@gmail.com>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Tested-by: Lee Tibbert <lee.tibbert@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoblock, bfq: fix wrong init of saved start time for weight raising
Paolo Valente [Thu, 21 Sep 2017 09:04:00 +0000 (11:04 +0200)]
block, bfq: fix wrong init of saved start time for weight raising

This commit fixes a bug that causes bfq to fail to guarantee a high
responsiveness on some drives, if there is heavy random read+write I/O
in the background. More precisely, such a failure allowed this bug to
be found [1], but the bug may well cause other yet unreported
anomalies.

BFQ raises the weight of the bfq_queues associated with soft real-time
applications, to privilege the I/O, and thus reduce latency, for these
applications. This mechanism is named soft-real-time weight raising in
BFQ. A soft real-time period may happen to be nested into an
interactive weight raising period, i.e., it may happen that, when a
bfq_queue switches to a soft real-time weight-raised state, the
bfq_queue is already being weight-raised because deemed interactive
too. In this case, BFQ saves in a special variable
wr_start_at_switch_to_srt, the time instant when the interactive
weight-raising period started for the bfq_queue, i.e., the time
instant when BFQ started to deem the bfq_queue interactive. This value
is then used to check whether the interactive weight-raising period
would still be in progress when the soft real-time weight-raising
period ends.  If so, interactive weight raising is restored for the
bfq_queue. This restore is useful, in particular, because it prevents
bfq_queues from losing their interactive weight raising prematurely,
as a consequence of spurious, short-lived soft real-time
weight-raising periods caused by wrong detections as soft real-time.

If, instead, a bfq_queue switches to soft-real-time weight raising
while it *is not* already in an interactive weight-raising period,
then the variable wr_start_at_switch_to_srt has no meaning during the
following soft real-time weight-raising period. Unfortunately the
handling of this case is wrong in BFQ: not only the variable is not
flagged somehow as meaningless, but it is also set to the time when
the switch to soft real-time weight-raising occurs. This may cause an
interactive weight-raising period to be considered mistakenly as still
in progress, and thus a spurious interactive weight-raising period to
start for the bfq_queue, at the end of the soft-real-time
weight-raising period. In particular the spurious interactive
weight-raising period will be considered as still in progress, if the
soft-real-time weight-raising period does not last very long. The
bfq_queue will then be wrongly privileged and, if I/O bound, will
unjustly steal bandwidth to truly interactive or soft real-time
bfq_queues, harming responsiveness and low latency.

This commit fixes this issue by just setting wr_start_at_switch_to_srt
to minus infinity (farthest past time instant according to jiffies
macros): when the soft-real-time weight-raising period ends, certainly
no interactive weight-raising period will be considered as still in
progress.

[1] Background I/O Type: Random - Background I/O mix: Reads and writes
- Application to start: LibreOffice Writer in
http://www.phoronix.com/scan.php?page=news_item&px=Linux-4.13-IO-Laptop

Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Angelo Ruocco <angeloruocco90@gmail.com>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Tested-by: Lee Tibbert <lee.tibbert@gmail.com>
Tested-by: Mirko Montanari <mirkomontanari91@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agowriteback: only allow one inflight and pending full flush
Jens Axboe [Thu, 28 Sep 2017 17:31:55 +0000 (11:31 -0600)]
writeback: only allow one inflight and pending full flush

When someone calls wakeup_flusher_threads() or
wakeup_flusher_threads_bdi(), they schedule writeback of all dirty
pages in the system (or on that bdi). If we are tight on memory, we
can get tons of these queued from kswapd/vmscan. This causes (at
least) two problems:

1) We consume a ton of memory just allocating writeback work items.
   We've seen as much as 600 million of these writeback work items
   pending. That's a lot of memory to pointlessly hold hostage,
   while the box is under memory pressure.

2) We spend so much time processing these work items, that we
   introduce a softlockup in writeback processing. This is because
   each of the writeback work items don't end up doing any work (it's
   hard when you have millions of identical ones coming in to the
   flush machinery), so we just sit in a tight loop pulling work
   items and deleting/freeing them.

Fix this by adding a 'start_all' bit to the writeback structure, and
set that when someone attempts to flush all dirty pages. The bit is
cleared when we start writeback on that work item. If the bit is
already set when we attempt to queue !nr_pages writeback, then we
simply ignore it.

This provides us one full flush in flight, with one pending as well,
and makes for more efficient handling of this type of writeback.

Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Tested-by: Chris Mason <clm@fb.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agowriteback: move nr_pages == 0 logic to one location
Jens Axboe [Thu, 28 Sep 2017 17:31:22 +0000 (11:31 -0600)]
writeback: move nr_pages == 0 logic to one location

Now that we have no external callers of wb_start_writeback(), we
can shuffle the passing in of 'nr_pages'. Everybody passes in 0
at this point, so just kill the argument and move the dirty
count retrieval to that function.

Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Tested-by: Chris Mason <clm@fb.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agowriteback: make wb_start_writeback() static
Jens Axboe [Thu, 28 Sep 2017 17:28:55 +0000 (11:28 -0600)]
writeback: make wb_start_writeback() static

We don't have any callers outside of fs-writeback.c anymore,
make it private.

Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Tested-by: Chris Mason <clm@fb.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agowriteback: pass in '0' for nr_pages writeback in laptop mode
Jens Axboe [Thu, 28 Sep 2017 17:28:02 +0000 (11:28 -0600)]
writeback: pass in '0' for nr_pages writeback in laptop mode

Laptop mode really wants to writeback the number of dirty
pages and inodes. Instead of calculating this in the caller,
just pass in 0 and let wakeup_flusher_threads() handle it.

Use the new wakeup_flusher_threads_bdi() instead of rolling
our own.

Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Tested-by: Chris Mason <clm@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agowriteback: provide a wakeup_flusher_threads_bdi()
Jens Axboe [Thu, 28 Sep 2017 17:26:59 +0000 (11:26 -0600)]
writeback: provide a wakeup_flusher_threads_bdi()

Similar to wakeup_flusher_threads(), except that we only wake
up the flusher threads on the specified backing device.

No functional changes in this patch.

Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Tested-by: Chris Mason <clm@fb.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agowriteback: remove 'range_cyclic' argument for wb_start_writeback()
Jens Axboe [Thu, 28 Sep 2017 17:25:03 +0000 (11:25 -0600)]
writeback: remove 'range_cyclic' argument for wb_start_writeback()

All the callers pass in 'true' for range_cyclic, so kill the
argument.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agowriteback: switch wakeup_flusher_threads() to cyclic writeback
Jens Axboe [Wed, 27 Sep 2017 19:28:18 +0000 (13:28 -0600)]
writeback: switch wakeup_flusher_threads() to cyclic writeback

We're writing back the full range of dirty pages on the devices,
there's no point in making this special and not do normal range
cyclic writeback.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agofs: kill 'nr_pages' argument from wakeup_flusher_threads()
Jens Axboe [Wed, 20 Sep 2017 14:58:25 +0000 (08:58 -0600)]
fs: kill 'nr_pages' argument from wakeup_flusher_threads()

Everybody is passing in 0 now, let's get rid of the argument.

Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agobuffer: eliminate the need to call free_more_memory() in __getblk_slow()
Jens Axboe [Wed, 27 Sep 2017 12:08:57 +0000 (06:08 -0600)]
buffer: eliminate the need to call free_more_memory() in __getblk_slow()

Since the previous commit removed any case where grow_buffers()
would return failure due to memory allocations, we can safely
remove the case where we have to call free_more_memory() in
this function.

Since this is also the last user of free_more_memory(), kill
it off completely.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agobuffer: grow_dev_page() should use __GFP_NOFAIL for all cases
Jens Axboe [Wed, 27 Sep 2017 11:45:36 +0000 (05:45 -0600)]
buffer: grow_dev_page() should use __GFP_NOFAIL for all cases

We currently use it for find_or_create_page(), which means that it
cannot fail. Ensure we also pass in 'retry == true' to
alloc_page_buffers(), which also ensure that it cannot fail.

After this, there are no failure cases in grow_dev_page() that
occur because of a failed memory allocation.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agobuffer: have alloc_page_buffers() use __GFP_NOFAIL
Jens Axboe [Wed, 27 Sep 2017 11:40:16 +0000 (05:40 -0600)]
buffer: have alloc_page_buffers() use __GFP_NOFAIL

Instead of adding weird retry logic in that function, utilize
__GFP_NOFAIL to ensure that the vm takes care of handling any
potential retries appropriately. This means we don't have to
call free_more_memory() from here.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoblk-mq: wire up completion notifier for laptop mode
Jens Axboe [Sat, 30 Sep 2017 08:08:24 +0000 (02:08 -0600)]
blk-mq: wire up completion notifier for laptop mode

For some reason, the laptop mode IO completion notified was never wired
up for blk-mq. Ensure that we trigger the callback appropriately, to arm
the laptop mode flush timer.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <Bart.VanAssche@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoblk-mq-tag: kill unused tag enums
Jens Axboe [Sun, 1 Oct 2017 07:26:21 +0000 (01:26 -0600)]
blk-mq-tag: kill unused tag enums

We don't have any notion of a tagging cache anymore, and haven't
for a long time. Kill off the unused enums.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoblk-mq: remove unused function hctx_allow_merges
weiping zhang [Sat, 30 Sep 2017 07:01:48 +0000 (15:01 +0800)]
blk-mq: remove unused function hctx_allow_merges

since 9bddeb2a5b981 "blk-mq: make per-sw-queue bio merge as default .bio_merge"
there is no caller for this function.

Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: weiping zhang <zhangweiping@didichuxing.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonull_blk: add "no_sched" module parameter
weiping zhang [Sat, 30 Sep 2017 01:49:21 +0000 (09:49 +0800)]
null_blk: add "no_sched" module parameter

add an option that disable io scheduler for null block device.

Signed-off-by: weiping zhang <zhangweiping@didichuxing.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoblock: fix a build error
Shaohua Li [Tue, 26 Sep 2017 18:02:12 +0000 (11:02 -0700)]
block: fix a build error

The code is only for blkcg not for all cgroups

Fixes: d4478e92d618 ("block/loop: make loop cgroup aware")
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoblock: cryptoloop - Fix build warning
Corentin Labbe [Mon, 25 Sep 2017 17:10:07 +0000 (19:10 +0200)]
block: cryptoloop - Fix build warning

This patch fix the following build warning:
drivers/block/cryptoloop.c:46:8: warning: variable 'cipher' set but not used [-Wunused-but-set-variable]

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoblock/loop: make loop cgroup aware
Shaohua Li [Mon, 25 Sep 2017 19:07:22 +0000 (13:07 -0600)]
block/loop: make loop cgroup aware

loop block device handles IO in a separate thread. The actual IO
dispatched isn't cloned from the IO loop device received, so the
dispatched IO loses the cgroup context.

I'm ignoring buffer IO case now, which is quite complicated.  Making the
loop thread aware cgroup context doesn't really help. The loop device
only writes to a single file. In current writeback cgroup
implementation, the file can only belong to one cgroup.

For direct IO case, we could workaround the issue in theory. For
example, say we assign cgroup1 5M/s BW for loop device and cgroup2
10M/s. We can create a special cgroup for loop thread and assign at
least 15M/s for the underlayer disk. In this way, we correctly throttle
the two cgroups. But this is tricky to setup.

This patch tries to address the issue. We record bio's css in loop
command. When loop thread is handling the command, we then use the API
provided in patch 1 to set the css for current task. The bio layer will
use the css for new IO (from patch 3).

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoblock: make blkcg aware of kthread stored original cgroup info
Shaohua Li [Thu, 14 Sep 2017 21:02:06 +0000 (14:02 -0700)]
block: make blkcg aware of kthread stored original cgroup info

bio_blkcg is the only API to get cgroup info for a bio right now. If
bio_blkcg finds current task is a kthread and has original blkcg
associated, it will use the css instead of associating the bio to
current task. This makes it possible that kthread dispatches bios on
behalf of other threads.

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoblkcg: delete unused APIs
Shaohua Li [Thu, 14 Sep 2017 21:02:05 +0000 (14:02 -0700)]
blkcg: delete unused APIs

Nobody uses the APIs right now.

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agokthread: add a mechanism to store cgroup info
Shaohua Li [Thu, 14 Sep 2017 21:02:04 +0000 (14:02 -0700)]
kthread: add a mechanism to store cgroup info

kthread usually runs jobs on behalf of other threads. The jobs should be
charged to cgroup of original threads. But the jobs run in a kthread,
where we lose the cgroup context of original threads. The patch adds a
machanism to record cgroup info of original threads in kthread context.
Later we can retrieve the cgroup info and attach the cgroup info to jobs.

Since this mechanism is only required by kthread, we store the cgroup
info in kthread data instead of generic task_struct.

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Tue, 26 Sep 2017 01:24:14 +0000 (18:24 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs

Pull compat fix from Al Viro:
 "I really wish gcc warned about conversions from pointer to function
  into void *..."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fix a typo in put_compat_shm_info()

7 years agofix a typo in put_compat_shm_info()
Al Viro [Tue, 26 Sep 2017 00:38:45 +0000 (20:38 -0400)]
fix a typo in put_compat_shm_info()

"uip" misspelled as "up"; unfortunately, the latter happens to be
a function and gcc is happy to convert it to void *...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
7 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-block
Linus Torvalds [Mon, 25 Sep 2017 22:46:04 +0000 (15:46 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - Two sets of NVMe pull requests from Christoph:
      - Fixes for the Fibre Channel host/target to fix spec compliance
      - Allow a zero keep alive timeout
      - Make the debug printk for broken SGLs work better
      - Fix queue zeroing during initialization
      - Set of RDMA and FC fixes
      - Target div-by-zero fix

 - bsg double-free fix.

 - ndb unknown ioctl fix from Josef.

 - Buffered vs O_DIRECT page cache inconsistency fix. Has been floating
   around for a long time, well reviewed. From Lukas.

 - brd overflow fix from Mikulas.

 - Fix for a loop regression in this merge window, where using a union
   for two members of the loop_cmd turned out to be a really bad idea.
   From Omar.

 - Fix for an iostat regression fix in this series, using the wrong API
   to get at the block queue. From Shaohua.

 - Fix for a potential blktrace delection deadlock. From Waiman.

* 'for-linus' of git://git.kernel.dk/linux-block: (30 commits)
  nvme-fcloop: fix port deletes and callbacks
  nvmet-fc: sync header templates with comments
  nvmet-fc: ensure target queue id within range.
  nvmet-fc: on port remove call put outside lock
  nvme-rdma: don't fully stop the controller in error recovery
  nvme-rdma: give up reconnect if state change fails
  nvme-core: Use nvme_wq to queue async events and fw activation
  nvme: fix sqhd reference when admin queue connect fails
  block: fix a crash caused by wrong API
  fs: Fix page cache inconsistency when mixing buffered and AIO DIO
  nvmet: implement valid sqhd values in completions
  nvme-fabrics: Allow 0 as KATO value
  nvme: allow timed-out ios to retry
  nvme: stop aer posting if controller state not live
  nvme-pci: Print invalid SGL only once
  nvme-pci: initialize queue memory before interrupts
  nvmet-fc: fix failing max io queue connections
  nvme-fc: use transport-specific sgl format
  nvme: add transport SGL definitions
  nvme.h: remove FC transport-specific error values
  ...

7 years agoMerge tag 'gfs2-for-linus-4.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 25 Sep 2017 22:41:56 +0000 (15:41 -0700)]
Merge tag 'gfs2-for-linus-4.14-rc3' of git://git./linux/kernel/git/gfs2/linux-gfs2

Pull gfs2 fix from Bob Peterson:
 "GFS2: Fix an old regression in GFS2's debugfs interface

 This fixes a regression introduced by commit 88ffbf3e037e ("GFS2: Use
 resizable hash table for glocks"). The regression caused the glock dump
 in debugfs to not report all the glocks, which makes debugging
 extremely difficult"

* tag 'gfs2-for-linus-4.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  gfs2: Fix debugfs glocks dump

7 years agoMerge tag 'microblaze-4.14-rc3' of git://git.monstr.eu/linux-2.6-microblaze
Linus Torvalds [Mon, 25 Sep 2017 22:37:19 +0000 (15:37 -0700)]
Merge tag 'microblaze-4.14-rc3' of git://git.monstr.eu/linux-2.6-microblaze

Pull Microblaze fixes from Michal Simek:

 - Kbuild fix

 - use vma_pages

 - setup default little endians

* tag 'microblaze-4.14-rc3' of git://git.monstr.eu/linux-2.6-microblaze:
  arch: change default endian for microblaze
  microblaze: Cocci spatch "vma_pages"
  microblaze: Add missing kvm_para.h to Kbuild

7 years agoMerge tag 'trace-v4.14-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rosted...
Linus Torvalds [Mon, 25 Sep 2017 22:22:31 +0000 (15:22 -0700)]
Merge tag 'trace-v4.14-rc1-2' of git://git./linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "Stack tracing and RCU has been having issues with each other and
  lockdep has been pointing out constant problems.

  The changes have been going into the stack tracer, but it has been
  discovered that the problem isn't with the stack tracer itself, but it
  is with calling save_stack_trace() from within the internals of RCU.

  The stack tracer is the one that can trigger the issue the easiest,
  but examining the problem further, it could also happen from a WARN()
  in the wrong place, or even if an NMI happened in this area and it did
  an rcu_read_lock().

  The critical area is where RCU is not watching. Which can happen while
  going to and from idle, or bringing up or taking down a CPU.

  The final fix was to put the protection in kernel_text_address() as it
  is the one that requires RCU to be watching while doing the stack
  trace.

  To make this work properly, Paul had to allow rcu_irq_enter() happen
  after rcu_nmi_enter(). This should have been done anyway, since an NMI
  can page fault (reading vmalloc area), and a page fault triggers
  rcu_irq_enter().

  One patch is just a consolidation of code so that the fix only needed
  to be done in one location"

* tag 'trace-v4.14-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Remove RCU work arounds from stack tracer
  extable: Enable RCU if it is not watching in kernel_text_address()
  extable: Consolidate *kernel_text_address() functions
  rcu: Allow for page faults in NMI handlers

7 years agonvme-fcloop: fix port deletes and callbacks
James Smart [Tue, 19 Sep 2017 21:01:50 +0000 (14:01 -0700)]
nvme-fcloop: fix port deletes and callbacks

Now that there are potentially long delays between when a remoteport or
targetport delete calls is made and when the callback occurs (dev_loss_tmo
timeout), no longer block in the delete routines and move the final nport
puts to the callbacks.

Moved the fcloop_nport_get/put/free routines to avoid forward declarations.

Ensure port_info structs used in registrations are nulled in case fields
are not set (ex: devloss_tmo values).

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvmet-fc: sync header templates with comments
James Smart [Wed, 20 Sep 2017 18:07:26 +0000 (11:07 -0700)]
nvmet-fc: sync header templates with comments

Comments were incorrect:
- defer_rcv was in host port template. moved to target port template
- Added Mandatory statements for target port template items

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvmet-fc: ensure target queue id within range.
James Smart [Tue, 19 Sep 2017 23:33:56 +0000 (16:33 -0700)]
nvmet-fc: ensure target queue id within range.

When searching for queue id's ensure they are within the expected range.

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvmet-fc: on port remove call put outside lock
James Smart [Tue, 19 Sep 2017 22:13:11 +0000 (15:13 -0700)]
nvmet-fc: on port remove call put outside lock

Avoid calling the put routine, as it may traverse to free routines while
holding the target lock.

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvme-rdma: don't fully stop the controller in error recovery
Sagi Grimberg [Thu, 21 Sep 2017 14:01:38 +0000 (17:01 +0300)]
nvme-rdma: don't fully stop the controller in error recovery

By calling nvme_stop_ctrl on a already failed controller will wait for the
scan work to complete (only by identify timeout expiration which is 60
seconds). This is unnecessary when we already know that the controller has
failed.

Reported-by: Yi Zhang <yizhan@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvme-rdma: give up reconnect if state change fails
Sagi Grimberg [Thu, 21 Sep 2017 14:01:37 +0000 (17:01 +0300)]
nvme-rdma: give up reconnect if state change fails

If we failed to transition to state LIVE after a successful reconnect,
then controller deletion already started. In this case there is no
point moving forward with reconnect.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvme-core: Use nvme_wq to queue async events and fw activation
Sagi Grimberg [Thu, 21 Sep 2017 14:01:36 +0000 (17:01 +0300)]
nvme-core: Use nvme_wq to queue async events and fw activation

async_event_work might race as it is executed from two different
workqueues at the moment.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvme: fix sqhd reference when admin queue connect fails
James Smart [Thu, 21 Sep 2017 15:13:49 +0000 (08:13 -0700)]
nvme: fix sqhd reference when admin queue connect fails

Fix bug in sqhd patch.

It wasn't the sq that was at risk. In the case where the admin queue
connect command fails, the sq->size field is not set. Therefore, this
becomes a divide by zero error.

Add a quick check to bypass under this failure condition.

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agogfs2: Fix debugfs glocks dump
Andreas Gruenbacher [Tue, 19 Sep 2017 12:15:35 +0000 (07:15 -0500)]
gfs2: Fix debugfs glocks dump

The switch to rhashtables (commit 88ffbf3e03) broke the debugfs glock
dump (/sys/kernel/debug/gfs2/<device>/glocks) for dumps bigger than a
single buffer: the right function for restarting an rhashtable iteration
from the beginning of the hash table is rhashtable_walk_enter;
rhashtable_walk_stop + rhashtable_walk_start will just resume from the
current position.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Cc: stable@vger.kernel.org # v4.3+
7 years agoblock: fix a crash caused by wrong API
Shaohua Li [Thu, 21 Sep 2017 19:17:16 +0000 (12:17 -0700)]
block: fix a crash caused by wrong API

part_stat_show takes a part device not a disk, so we should use
part_to_disk.

Fixes: d62e26b3ffd2("block: pass in queue to inflight accounting")
Cc: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Omar Sandoval <osandov@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agofs: Fix page cache inconsistency when mixing buffered and AIO DIO
Lukas Czerner [Thu, 21 Sep 2017 14:16:29 +0000 (08:16 -0600)]
fs: Fix page cache inconsistency when mixing buffered and AIO DIO

Currently when mixing buffered reads and asynchronous direct writes it
is possible to end up with the situation where we have stale data in the
page cache while the new data is already written to disk. This is
permanent until the affected pages are flushed away. Despite the fact
that mixing buffered and direct IO is ill-advised it does pose a thread
for a data integrity, is unexpected and should be fixed.

Fix this by deferring completion of asynchronous direct writes to a
process context in the case that there are mapped pages to be found in
the inode. Later before the completion in dio_complete() invalidate
the pages in question. This ensures that after the completion the pages
in the written area are either unmapped, or populated with up-to-date
data. Also do the same for the iomap case which uses
iomap_dio_complete() instead.

This has a side effect of deferring the completion to a process context
for every AIO DIO that happens on inode that has pages mapped. However
since the consensus is that this is ill-advised practice the performance
implication should not be a problem.

This was based on proposal from Jeff Moyer, thanks!

Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvmet: implement valid sqhd values in completions
James Smart [Mon, 18 Sep 2017 16:08:29 +0000 (09:08 -0700)]
nvmet: implement valid sqhd values in completions

To support sqhd, for initiators that are following the spec and
paying attention to sqhd vs their sqtail values:

- add sqhd to struct nvmet_sq
- initialize sqhd to 0 in nvmet_sq_setup
- rather than propagate the 0's-based qsize value from the connect message
  which requires a +1 in every sqhd update, and as nothing else references
  it, convert to 1's-based value in nvmt_sq/cq_setup() calls.
- validate connect message sqsize being non-zero per spec.
- updated assign sqhd for every completion that goes back.

Also remove handling the NULL sq case in __nvmet_req_complete, as it can't
happen with the current code.

Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvme-fabrics: Allow 0 as KATO value
Guilherme G. Piccoli [Thu, 14 Sep 2017 16:59:28 +0000 (13:59 -0300)]
nvme-fabrics: Allow 0 as KATO value

Currently, driver code allows user to set 0 as KATO
(Keep Alive TimeOut), but this is not being respected.
This patch enforces the expected behavior.

Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvme: allow timed-out ios to retry
James Smart [Thu, 7 Sep 2017 20:18:04 +0000 (13:18 -0700)]
nvme: allow timed-out ios to retry

Currently the nvme_req_needs_retry() applies several checks to see if
a retry is allowed. On of those is whether the current time has exceeded
the start time of the io plus the timeout length. This check, if an io
times out, means there is never a retry allowed for the io. Which means
applications see the io failure.

Remove this check and allow the io to timeout, like it does on other
protocols, and retries to be made.

On the FC transport, a frame can be lost for an individual io, and there
may be no other errors that escalate for the connection/association.
The io will timeout, which causes the transport to escalate into creating
a new association, but the io that timed out, due to this retry logic, has
already failed back to the application and things are hosed.

Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvme: stop aer posting if controller state not live
James Smart [Thu, 14 Sep 2017 18:03:09 +0000 (11:03 -0700)]
nvme: stop aer posting if controller state not live

If an nvme async_event command completes, in most cases, a new
async event is posted. However, if the controller enters a
resetting or reconnecting state, there is nothing to block the
scheduled work element from posting the async event again. Nor are
there calls from the transport to stop async events when an
association dies.

In the case of FC, where the association is torn down, the aer must
be aborted on the FC link and completes through the normal job
completion path. Thus the terminated async event ends up being
rescheduled even though the controller isn't in a valid state for
the aer, and the reposting gets the transport into a partially torn
down data structure.

It's possible to hit the scenario on rdma, although much less likely
due to an aer completing right as the association is terminated and
as the association teardown reclaims the blk requests via
nvme_cancel_request() so its immediate, not a link-related action
like on FC.

Fix by putting controller state checks in both the async event
completion routine where it schedules the async event and in the
async event work routine before it calls into the transport. It's
effectively a "stop_async_events()" behavior.  The transport, when
it creates a new association with the subsystem will transition
the state back to live and is already restarting the async event
posting.

Signed-off-by: James Smart <james.smart@broadcom.com>
[hch: remove taking a lock over reading the controller state]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvme-pci: Print invalid SGL only once
Keith Busch [Fri, 15 Sep 2017 17:05:38 +0000 (13:05 -0400)]
nvme-pci: Print invalid SGL only once

The WARN_ONCE macro returns true if the condition is true, not if the
warn was raised, so we're printing the scatter list every time it's
invalid. This is excessive and makes debugging harder, so this patch
prints it just once.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvme-pci: initialize queue memory before interrupts
Keith Busch [Thu, 14 Sep 2017 17:54:39 +0000 (13:54 -0400)]
nvme-pci: initialize queue memory before interrupts

A spurious interrupt before the nvme driver has initialized the completion
queue may inadvertently cause the driver to believe it has a completion
to process. This may result in a NULL dereference since the nvmeq's tags
are not set at this point.

The patch initializes the host's CQ memory so that a spurious interrupt
isn't mistaken for a real completion.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvmet-fc: fix failing max io queue connections
James Smart [Mon, 11 Sep 2017 23:16:53 +0000 (16:16 -0700)]
nvmet-fc: fix failing max io queue connections

fc transport is treating NVMET_NR_QUEUES as maximum queue count, e.g.
admin queue plus NVMET_NR_QUEUES-1 io queues.  But NVMET_NR_QUEUES is
the number of io queues, so maximum queue count is really
NVMET_NR_QUEUES+1.

Fix the handling in the target fc transport

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvme-fc: use transport-specific sgl format
James Smart [Thu, 7 Sep 2017 20:20:24 +0000 (13:20 -0700)]
nvme-fc: use transport-specific sgl format

Sync with NVM Express spec change and FC-NVME 1.18.

FC transport sets SGL type to Transport SGL Data Block Descriptor and
subtype to transport-specific value 0x0A.

Removed the warn-on's on the PRP fields. They are unneeded. They were
to check for values from the upper layer that weren't set right, and
for the most part were fine. But, with Async events, which reuse the
same structure and 2nd time issued the SGL overlay converted them to
the Transport SGL values - the warn-on's were errantly firing.

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvme: add transport SGL definitions
James Smart [Thu, 7 Sep 2017 20:20:23 +0000 (13:20 -0700)]
nvme: add transport SGL definitions

Add transport SGL defintions from NVMe TP 4008, required for
the final NVMe-FC standard.

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvme.h: remove FC transport-specific error values
James Smart [Thu, 7 Sep 2017 23:27:25 +0000 (16:27 -0700)]
nvme.h: remove FC transport-specific error values

The NVM express group recinded the reserved range for the transport.
Remove the FC-centric values that had been defined.

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoqla2xxx: remove use of FC-specific error codes
James Smart [Thu, 14 Sep 2017 18:30:15 +0000 (11:30 -0700)]
qla2xxx: remove use of FC-specific error codes

The qla2xxx driver uses the FC-specific error when it needed to return an
error to the FC-NVME transport.  Convert to use a generic value instead.

Signed-off-by: James Smart <james.smart@broadcom.com>
Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agolpfc: remove use of FC-specific error codes
James Smart [Thu, 7 Sep 2017 23:27:29 +0000 (16:27 -0700)]
lpfc: remove use of FC-specific error codes

The lpfc driver uses the FC-specific error when it needed to return an
error to the FC-NVME transport. Convert to use a generic value instead.

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvmet-fcloop: remove use of FC-specific error codes
James Smart [Thu, 7 Sep 2017 23:27:28 +0000 (16:27 -0700)]
nvmet-fcloop: remove use of FC-specific error codes

The FC-NVME transport loopback test module used the FC-specific error
codes in cases where it emulated a transport abort case. Instead of
using the FC-specific values, now use a generic value (NVME_SC_INTERNAL).

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvmet-fc: remove use of FC-specific error codes
James Smart [Thu, 7 Sep 2017 23:27:27 +0000 (16:27 -0700)]
nvmet-fc: remove use of FC-specific error codes

The FC-NVME target transport used the FC-specific error codes in
return codes when the transport or lldd failed. Instead of using the
FC-specific values, now use a generic value (NVME_SC_INTERNAL).

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonvme-fc: remove use of FC-specific error codes
James Smart [Thu, 7 Sep 2017 23:27:26 +0000 (16:27 -0700)]
nvme-fc: remove use of FC-specific error codes

The FC-NVME transport used the FC-specific error codes in cases where
it had to fabricate an error to go back up stack. Instead of using the
FC-specific values, now use a generic value (NVME_SC_INTERNAL).

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoloop: remove union of use_aio and ref in struct loop_cmd
Omar Sandoval [Wed, 20 Sep 2017 21:24:34 +0000 (14:24 -0700)]
loop: remove union of use_aio and ref in struct loop_cmd

When the request is completed, lo_complete_rq() checks cmd->use_aio.
However, if this is in fact an aio request, cmd->use_aio will have
already been reused as cmd->ref by lo_rw_aio*. Fix it by not using a
union. On x86_64, there's a hole after the union anyways, so this
doesn't make struct loop_cmd any bigger.

Fixes: 92d773324b7e ("block/loop: fix use after free")
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoblktrace: Fix potential deadlock between delete & sysfs ops
Waiman Long [Wed, 20 Sep 2017 19:12:20 +0000 (13:12 -0600)]
blktrace: Fix potential deadlock between delete & sysfs ops

The lockdep code had reported the following unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(s_active#228);
                               lock(&bdev->bd_mutex/1);
                               lock(s_active#228);
  lock(&bdev->bd_mutex);

 *** DEADLOCK ***

The deadlock may happen when one task (CPU1) is trying to delete a
partition in a block device and another task (CPU0) is accessing
tracing sysfs file (e.g. /sys/block/dm-1/trace/act_mask) in that
partition.

The s_active isn't an actual lock. It is a reference count (kn->count)
on the sysfs (kernfs) file. Removal of a sysfs file, however, require
a wait until all the references are gone. The reference count is
treated like a rwsem using lockdep instrumentation code.

The fact that a thread is in the sysfs callback method or in the
ioctl call means there is a reference to the opended sysfs or device
file. That should prevent the underlying block structure from being
removed.

Instead of using bd_mutex in the block_device structure, a new
blk_trace_mutex is now added to the request_queue structure to protect
access to the blk_trace structure.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Waiman Long <longman@redhat.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Fix typo in patch subject line, and prune a comment detailing how
the code used to work.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agonbd: ignore non-nbd ioctl's
Josef Bacik [Sat, 6 May 2017 02:25:18 +0000 (22:25 -0400)]
nbd: ignore non-nbd ioctl's

In testing we noticed that nbd would spew if you ran a fio job against
the raw device itself.  This is because fio calls a block device
specific ioctl, however the block layer will first pass this back to the
driver ioctl handler in case the driver wants to do something special.
Since the device was setup using netlink this caused us to spew every
time fio called this ioctl.  Since we don't have special handling, just
error out for any non-nbd specific ioctl's that come in.  This fixes the
spew.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agobsg-lib: don't free job in bsg_prepare_job
Christoph Hellwig [Thu, 7 Sep 2017 11:54:35 +0000 (13:54 +0200)]
bsg-lib: don't free job in bsg_prepare_job

The job structure is allocated as part of the request, so we should not
free it in the error path of bsg_prepare_job.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: stable@vger.kernel.org
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agobrd: fix overflow in __brd_direct_access
Mikulas Patocka [Wed, 13 Sep 2017 13:17:57 +0000 (09:17 -0400)]
brd: fix overflow in __brd_direct_access

The code in __brd_direct_access multiplies the pgoff variable by page size
and divides it by 512. It can cause overflow on 32-bit architectures. The
overflow happens if we create ramdisk larger than 4G and use it as a
sparse device.

This patch replaces multiplication and division with multiplication by the
number of sectors per page.

Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Fixes: 1647b9b959c7 ("brd: add dax_operations support")
Cc: stable@vger.kernel.org # 4.12+
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoarch: change default endian for microblaze
Babu Moger [Mon, 18 Sep 2017 16:53:29 +0000 (10:53 -0600)]
arch: change default endian for microblaze

Fix the default for microblaze. Michal Simek mentioned default for
microblaze should be CPU_LITTLE_ENDIAN.

Fixes : commit 206d3642d8ee ("arch/microblaze: add choice for endianness
and update Makefile")

Signed-off-by: Babu Moger <babu.moger@oracle.com>
Cc: Michal Simek <monstr@monstr.eu>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
7 years agomicroblaze: Cocci spatch "vma_pages"
Thomas Meyer [Wed, 20 Sep 2017 22:29:36 +0000 (00:29 +0200)]
microblaze: Cocci spatch "vma_pages"

Use vma_pages function on vma object instead of explicit computation.
Found by coccinelle spatch "api/vma_pages.cocci"

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
7 years agomicroblaze: Add missing kvm_para.h to Kbuild
Michal Simek [Tue, 19 Sep 2017 14:40:21 +0000 (16:40 +0200)]
microblaze: Add missing kvm_para.h to Kbuild

Running make allmodconfig;make is throwing compilation error:
  CC      kernel/watchdog.o
In file included from ./include/linux/kvm_para.h:4:0,
                 from kernel/watchdog.c:29:
./include/uapi/linux/kvm_para.h:32:26: fatal error: asm/kvm_para.h: No
such file or directory
 #include <asm/kvm_para.h>
                          ^
compilation terminated.
make[1]: *** [kernel/watchdog.o] Error 1
make: *** [kernel/watchdog.o] Error 2

Reported-by: Michal Hocko <mhocko@kernel.org>
Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Fixes: 83f0124ad81e87b ("microblaze: remove asm-generic wrapper headers")
Reviewed-by: Tobias Klauser <tklauser@distanz.ch>
Tested-by: Michal Hocko <mhocko@suse.com>
7 years agoLinux 4.14-rc2 v4.14-rc2
Linus Torvalds [Sun, 24 Sep 2017 23:38:56 +0000 (16:38 -0700)]
Linux 4.14-rc2

7 years agoMerge tag 'devicetree-fixes-for-4.14' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 24 Sep 2017 23:04:12 +0000 (16:04 -0700)]
Merge tag 'devicetree-fixes-for-4.14' of git://git./linux/kernel/git/robh/linux

Pull DeviceTree fixes from Rob Herring:

 - fix build for !OF providing empty of_find_device_by_node

 - fix Abracon vendor prefix

 - sync dtx_diff include paths (again)

 - a stm32h7 clock binding doc fix

* tag 'devicetree-fixes-for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  dt-bindings: clk: stm32h7: fix clock-cell size
  scripts/dtc: dtx_diff - 2nd update of include dts paths to match build
  dt-bindings: fix vendor prefix for Abracon
  of: provide inline helper for of_find_device_by_node

7 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 24 Sep 2017 19:33:58 +0000 (12:33 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Ingo Molnar:
 "Another round of CR3/PCID related fixes (I think this addresses all
  but one of the known problems with PCID support), an objtool fix plus
  a Clang fix that (finally) solves all Clang quirks to build a bootable
  x86 kernel as-is"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/asm: Fix inline asm call constraints for Clang
  objtool: Handle another GCC stack pointer adjustment bug
  x86/mm/32: Load a sane CR3 before cpu_init() on secondary CPUs
  x86/mm/32: Move setup_clear_cpu_cap(X86_FEATURE_PCID) earlier
  x86/mm/64: Stop using CR3.PCID == 0 in ASID-aware code
  x86/mm: Factor out CR3-building code

7 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 24 Sep 2017 19:28:55 +0000 (12:28 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer fix from Ingo Molnar:
 "A clocksource driver section mismatch fix"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource/integrator: Fix section mismatch warning

7 years agoMerge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 24 Sep 2017 18:57:07 +0000 (11:57 -0700)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull irq fixes from Ingo Molnar:
 "Three irqchip driver fixes, and an affinity mask helper function bug
  fix affecting x86"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  Revert "genirq: Restrict effective affinity to interrupts actually using it"
  irqchip.mips-gic: Fix shared interrupt mask writes
  irqchip/gic-v4: Fix building with ancient gcc
  irqchip/gic-v3: Iterate over possible CPUs by for_each_possible_cpu()

7 years agoMerge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 24 Sep 2017 18:53:13 +0000 (11:53 -0700)]
Merge branch 'core-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull address-limit checking fixes from Ingo Molnar:
 "This fixes a number of bugs in the address-limit (USER_DS) checks that
  got introduced in the merge window, (mostly) affecting the ARM and
  ARM64 platforms"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  arm64/syscalls: Move address limit check in loop
  arm/syscalls: Optimize address limit check
  Revert "arm/syscalls: Check address limit on user-mode return"
  syscalls: Use CHECK_DATA_CORRUPTION for addr_limit_user_check

7 years agoMerge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
Linus Torvalds [Sun, 24 Sep 2017 18:40:41 +0000 (11:40 -0700)]
Merge branch 'next-general' of git://git./linux/kernel/git/jmorris/linux-security

Pull misc security layer update from James Morris:
 "This is the remaining 'general' change in the security tree for v4.14,
  following the direct merging of SELinux (+ TOMOYO), AppArmor, and
  seccomp.

  That's everything now for the security tree except IMA, which will
  follow shortly (I've been traveling for the past week with patchy
  internet)"

* 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  security: fix description of values returned by cap_inode_need_killpriv

7 years agoMerge branch 'next-tpm' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
Linus Torvalds [Sun, 24 Sep 2017 18:34:28 +0000 (11:34 -0700)]
Merge branch 'next-tpm' of git://git./linux/kernel/git/jmorris/linux-security

Pull TPM updates from James Morris:
 "Here are the TPM updates from Jarkko for v4.14, which I've placed in
  their own branch (next-tpm). I ended up cherry-picking them as other
  changes had been made in Jarkko's branch after he sent me his original
  pull request.

  I plan on maintaining a separate branch for TPM (and other security
  subsystems) from now on.

  From Jarkko: 'Not much this time except a few fixes'"

* 'next-tpm' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  tpm: ibmvtpm: simplify crq initialization and document crq format
  tpm: replace msleep() with  usleep_range() in TPM 1.2/2.0 generic drivers
  Documentation: tpm: add powered-while-suspended binding documentation
  tpm: tpm_crb: constify acpi_device_id.
  tpm: vtpm: constify vio_device_id

7 years agotpm: ibmvtpm: simplify crq initialization and document crq format
Michal Suchanek [Fri, 24 Feb 2017 19:35:16 +0000 (20:35 +0100)]
tpm: ibmvtpm: simplify crq initialization and document crq format

The crq is passed in registers and is the same on BE and LE hosts.
However, current implementation allocates a structure on-stack to
represent the crq, initializes the members swapping them to BE, and
loads the structure swapping it from BE. This is pointless and causes
GCC warnings about ununitialized members. Get rid of the structure and
the warnings.

Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>