Lars Ellenberg [Mon, 28 Apr 2014 16:43:28 +0000 (18:43 +0200)]
drbd: add back some fairness to AL transactions
When batching more updates to the activity log into single transactions,
we lost the ability for new requests to force themselves into the active
set: all preparation steps became non-blocking, and if all currently
hot extents keep busy, they could starve out new incoming requests
to cold extents for quite a while.
This can only happen if your IO backend accepts more IO operations per
average DRBD replication round trip time than you have al-extents
configured.
If we have incoming requests to cold extents,
at least do one blocking update per transaction.
In an artificial worst-case workload on SSD with an asynchronous 600 ms
replication link, with al-extents = 7 (the minimum we allow), and
concurrent full resynch, without this patch, some write requests have
been observed to be starved for 40 seconds.
With this patch, application observed a worst case latency of twice the
replication round trip time.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Lars Ellenberg [Mon, 28 Apr 2014 16:43:27 +0000 (18:43 +0200)]
drbd: keep max-bio size during detach/attach on disconnected primary
We want to store in persistent meta data what the peer DRBD can handle,
which, due to spreading requests to multiple bios,
may be more than its backing device can handle.
Otherwise, if a disconnected Primary temporarily loses access to its local data
as well, we may accidentally shrink the max-bio setting, portentially causing
already assembled, but not yet processed, application bios to be spuriously
failed due to device limits.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Lars Ellenberg [Mon, 28 Apr 2014 16:43:26 +0000 (18:43 +0200)]
drbd: fix a race between start_resync and send_and_submit
In the drbd make request function, specifically in
drbd_send_and_submit(), we decide whether we want to send the actual
write request, or only a "set this block out of sync" information.
We do so based on the current connection state, while holding the req_lock.
The connection state is not supposed to change while holding the req_lock.
But in drbd_start_resync, we did change that state anyways,
while only holding the global_state_lock, which is enough to change
sync-after dependencies (paused vs active resync), but
not good enough to change the connection state.
Fix: in drbd_start_resync, first grab the req_lock to serialize with
drbd_send_and_submit(), before grabbing the global_state_lock
to be able to evaluate the sync-after dependencies.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Lars Ellenberg [Mon, 28 Apr 2014 16:43:25 +0000 (18:43 +0200)]
drbd: Enable QUEUE_FLAG_DISCARD only if the peer can recieve P_TRIM
Allow the user of REQ_DISCARD.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Lars Ellenberg [Mon, 28 Apr 2014 16:43:24 +0000 (18:43 +0200)]
drbd: prepare sending side for REQ_DISCARD
Note that I do NOT call __drbd_chk_io_error for failed REQ_DISCARD.
That may be wrong, though, or needs to differ between EOPNOTSUPP and
other errors...
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Lars Ellenberg [Mon, 28 Apr 2014 16:43:23 +0000 (18:43 +0200)]
drbd: prepare receiving side for REQ_DISCARD
If the receiver needs to serve a discard request on a queue that does
not announce to be discard cabable, it falls back to do synchronous
blkdev_issue_zeroout().
We expect only "reasonably" large (up to one activity log extent?)
discard requests.
We do this to not to not block the receiver for too long in this
fallback code path, and to not set/clear too many bits inside one
spinlock_irq_save() in drbd_set_in_sync/drbd_set_out_of_sync,
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Lars Ellenberg [Mon, 28 Apr 2014 16:43:22 +0000 (18:43 +0200)]
drbd: allow parallel promote/demote actions
We plan to use genl_family->parallel_ops = true in the future,
but need to review all possible interactions first.
For now, only selectively drop genl_lock() in drbd_set_role(),
instead serializing on our own internal resource->conf_update mutex.
We now can be promoted/demoted on many resources in parallel,
which may significantly improve cluster failover times
when fencing is required.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Lars Ellenberg [Mon, 28 Apr 2014 16:43:21 +0000 (18:43 +0200)]
drbd: perpare for genetlink parallel_ops
Because all administrative requests via genetlink have been globally
serialized via genl_lock(), we used to have one static struct
drbd_config_context "admin context".
Move this on-stack to the respective callback functions.
This will allow us to selectively drop the genl_lock()
(or use genl_family->parallel_ops) in the future.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Philipp Reisner [Mon, 28 Apr 2014 16:43:20 +0000 (18:43 +0200)]
drbd: Do not BUG() when connection breaks in a special way
When a 'cluster wide' disconnect executes, the result comes back
from the peer, and immediately after that the connection breaks
then _conn_rq_cond() reported back SS_CW_SUCCESS.
Therefore _conn_request_state() calls conn_set_state(), which
has a BUG() in it.
The BUG() is hit because conn_is_valid_transition() does not like
the transaction. Which goes back to is_valid_soft_transition()
returning SS_OUTDATE_WO_CONN.
This fix is to consider an error reported by is_valid_soft_transition()
even when the peer agreed to the transaction.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Lars Ellenberg [Mon, 28 Apr 2014 16:43:19 +0000 (18:43 +0200)]
drbd: don't let application IO pre-empt resync too often
Before, application IO could pre-empt resync activity
for up to hardcoded 20 seconds per resync request.
A very busy server could throttle the effective resync bandwidth
down to one request per 20 seconds.
Now, we only let application IO pre-empt resync traffic
while the current resync rate estimate is above c-min-rate.
If you disable the c-min-rate throttle feature (set c-min-rate = 0),
application IO will no longer pre-empt resync traffic at all.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Lars Ellenberg [Mon, 28 Apr 2014 16:43:18 +0000 (18:43 +0200)]
drbd: fix potential distributed deadlock during verify or resync
If max-buffers and socket buffer sizes are "too small" for the chosen
resync rate, this could lead potentially lead to a distributed deadlock,
which may or may not resolve itself via the "ko-count" and request
timeout mechanism, or could be resolved by forced disconnect.
One option to deal with this is proper configuration:
use larger max-buffer and socket buffers settings,
or reduce the resync rate.
But even with bad configuration we should not deadlock,
but "gracefully" recover.
The issue is avoided by using only up to max-buffers/2 for resync
requests, and by using max-buffers not as a hard limit for data buffer
allocations, but as a throttle threshold only.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Lars Ellenberg [Mon, 28 Apr 2014 16:43:17 +0000 (18:43 +0200)]
drbd: resync: fix too large bursts for very slow rates
While merging adjacent dirty blocks into resync requests,
the resync rate throttle was disregarded.
For very low resync rates, the effective rate may have exceeded
the intended rate by a larger margin.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Lars Ellenberg [Mon, 28 Apr 2014 16:43:16 +0000 (18:43 +0200)]
drbd: fix stalled resync detection in /proc/drbd
If we don't make resync or verify progress for "too long",
we want to flag it as "stalled".
Since 2010, "use rolling marks for resync speed calculation"
this "too long" was wrong by a factor of HZ.
With HZ 250, it would have been flagged as stalled
after 100 minutes.
Hardcode 3 minutes instead.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Philipp Reisner [Mon, 28 Apr 2014 16:43:15 +0000 (18:43 +0200)]
drbd: Allow online layout change of AL while peer is not connected
If a user forces the operation he takes the blame in case
the peer does not have enough space. No reason to dey this...
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Philipp Reisner [Mon, 28 Apr 2014 16:43:14 +0000 (18:43 +0200)]
drbd: Remove drbd_wrappers.h
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Philipp Reisner [Mon, 28 Apr 2014 16:43:13 +0000 (18:43 +0200)]
drbd: Leave IO suspended if the fence handler find the peer primary
Actually we are clearing the susp_fen flag if we are not going
to call a fencing handler.
For setting the susp_fen flag needs to be edge-triggerd, and not
level triggered.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Philipp Reisner [Mon, 28 Apr 2014 16:43:12 +0000 (18:43 +0200)]
drbd: Break a deadlock while concurrent fencing and establishing a connection
When we need to outdate the peer while being promoted to primary,
and the connection gets established at the same time, we deadlock
in drbd_try_outdate_peer() when trying to clear the susp_fen
bit.
Fix this by setting the STATE_SENT bit while holding the mutex.
Using drbd_change_state(.. , CS_HARD, ..) which does not block
until STATE_SENT is cleared, is only for clearness. It does
not contribute anything to the fix.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Asai Thambi S P [Fri, 14 Mar 2014 01:45:15 +0000 (18:45 -0700)]
mtip32xx: Fix ERO and NoSnoop values in PCIe upstream on AMD systems
A hardware quirk in P320h/P420m interfere with PCIe transactions on some
AMD chipsets, making P320h/P420m unusable. This workaround is to disable
ERO and NoSnoop bits in the parent and root complex for normal
functioning of these devices
NOTE: This workaround is specific to AMD chipset with a PCIe upstream
device with device id 0x5aXX
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Signed-off-by: Sam Bradshaw <sbradshaw@micron.com>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
Asai Thambi S P [Thu, 17 Apr 2014 03:30:16 +0000 (20:30 -0700)]
mtip32xx: Remove dfs_parent after pci unregister
In module exit, dfs_parent and it's subtree were removed before
unregistering with pci. When debugfs entry for each device is attempted
to remove in pci_remove() context, they don't exist, as dfs_parent and
its children were already ripped apart.
Modified to first unregister with pci and then remove dfs_parent.
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
Asai Thambi S P [Thu, 17 Apr 2014 03:27:54 +0000 (20:27 -0700)]
mtip32xx: Increase timeout for STANDBY IMMEDIATE command
Increased timeout for STANDBY IMMEDIATE command to 2 minutes.
Signed-off-by: Selvan Mani <smani@micron.com>
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
Alexander Gordeev [Mon, 21 Apr 2014 15:19:32 +0000 (17:19 +0200)]
cciss: Use pci_enable_msix_exact() instead of pci_enable_msix()
As result of deprecation of MSI-X/MSI enablement functions
pci_enable_msix() and pci_enable_msi_block() all drivers
using these two interfaces need to be updated to use the
new pci_enable_msi_range() or pci_enable_msi_exact()
and pci_enable_msix_range() or pci_enable_msix_exact()
interfaces.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Cc: Mike Miller <mike.miller@hp.com>
Cc: iss_storagedev@hp.com
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-pci@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
Alexander Gordeev [Mon, 21 Apr 2014 15:19:31 +0000 (17:19 +0200)]
skd: Use pci_enable_msix_exact() instead of pci_enable_msix_range()
Function pci_enable_msix_exact() is a variation of
pci_enable_msix_range() that allows a device driver
to request a particular number of MSI-X interrupts,
rather than any number within a specified range.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: linux-pci@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
Jens Axboe [Wed, 16 Apr 2014 16:57:18 +0000 (10:57 -0600)]
bsg: update check for rq based driver for blk-mq
bsg currently checks ->request_fn to check whether a queue can
handle struct request. But with blk-mq, we don't have a request_fn
yet are request based. Add a queue_is_rq_based() helper and use
that in bsg, I'm guessing this is not the last place we need to
update for this. Besides, it better explains what is being
checked.
Signed-off-by: Jens Axboe <axboe@fb.com>
Jens Axboe [Wed, 16 Apr 2014 20:14:33 +0000 (14:14 -0600)]
jsflash: missed conversion from rq->buffer to bio_data(rq->bio)
Signed-off-by: Jens Axboe <axboe@fb.com>
Jens Axboe [Wed, 16 Apr 2014 17:36:54 +0000 (11:36 -0600)]
block: relax when to modify the timeout timer
Since we are now, by default, applying timer slack to expiry times,
the logic for when to modify a timer in the block code is suboptimal.
The block layer keeps a forward rolling timer per queue for all
requests, and modifies this timer if a request has a shorter timeout
than what the current expiry time is. However, this breaks down
when our rounded timer values get applied slack. Then each new
request ends up modifying the timer, since we're still a little
in front of the timer + slack.
Fix this by allowing a tolerance of HZ / 2, the timeout handling
doesn't need to be very precise. This drastically cuts down
the number of timer modifications we have to make.
Signed-off-by: Jens Axboe <axboe@fb.com>
Christoph Hellwig [Wed, 16 Apr 2014 07:44:59 +0000 (09:44 +0200)]
block: export blk_finish_request
This allows to mirror the blk-mq code flow for more a more readable I/O
completion handler in SCSI.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Christoph Hellwig [Wed, 16 Apr 2014 07:44:58 +0000 (09:44 +0200)]
blk-mq: rename mq_flush_work struct request member
We will use this work_struct to requeue scsi commands from the
completion handler as well, so give it a more generic name.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Christoph Hellwig [Wed, 16 Apr 2014 07:44:57 +0000 (09:44 +0200)]
blk-mq: add blk_mq_requeue_request
This allows to requeue a request that has been accepted by ->queue_rq
earlier. This is needed by the SCSI layer in various error conditions.
The existing internal blk_mq_requeue_request is renamed to
__blk_mq_requeue_request as it is a lower level building block for this
funtionality.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Christoph Hellwig [Wed, 16 Apr 2014 07:44:56 +0000 (09:44 +0200)]
blk-mq: add blk_mq_start_hw_queues
Add a helper to unconditionally kick contexts of a queue. This will
be needed by the SCSI layer to provide fair queueing between multiple
devices on a single host.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Christoph Hellwig [Wed, 16 Apr 2014 16:48:08 +0000 (10:48 -0600)]
blk-mq: add blk_mq_delay_queue
Add a blk-mq equivalent to blk_delay_queue so that the scsi layer can ask
to be kicked again after a delay.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Modified by me to kill the unnecessary preempt disable/enable
in the delayed workqueue handler.
Signed-off-by: Jens Axboe <axboe@fb.com>
Christoph Hellwig [Wed, 16 Apr 2014 07:44:54 +0000 (09:44 +0200)]
blk-mq: add async parameter to blk_mq_start_stopped_hw_queues
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Christoph Hellwig [Wed, 16 Apr 2014 07:44:53 +0000 (09:44 +0200)]
blk-mq: bidi support
Add two unlinkely branches to make sure the resid is initialized correctly
for bidi request pairs, and the second request gets properly freed.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Christoph Hellwig [Wed, 16 Apr 2014 07:44:52 +0000 (09:44 +0200)]
blk-mq: allow drivers to hook into I/O completion
Split out the bottom half of blk_mq_end_io so that drivers can perform
work when they know a request has been completed, but before it has been
freed. This also obsoletes blk_mq_end_io_partial as drivers can now
pass any value to blk_update_request directly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Jens Axboe [Wed, 16 Apr 2014 16:38:35 +0000 (10:38 -0600)]
blk-mq: kill preempt disable/enable in blk_mq_work_fn()
blk_mq_work_fn() is always invoked off the bounded workqueues,
so it can happily preempt among the queues in that set without
causing any issues for blk-mq.
Signed-off-by: Jens Axboe <axboe@fb.com>
Jens Axboe [Wed, 16 Apr 2014 15:23:48 +0000 (09:23 -0600)]
blk-mq: don't use preempt_count() to check for right CPU
UP or CONFIG_PREEMPT_NONE will return 0, and what we really
want to check is whether or not we are on the right CPU.
So don't make PREEMPT part of this, just test the CPU in
the mask directly.
Signed-off-by: Jens Axboe <axboe@fb.com>
Jens Axboe [Wed, 16 Apr 2014 14:26:20 +0000 (08:26 -0600)]
gdrom: missed conversion from req->buffer
The friendly Intel kbuild test robot reported:
drivers/cdrom/gdrom.c: In function 'gdrom_readdisk_dma':
drivers/cdrom/gdrom.c:605:3: error: 'struct request' has no member named 'buffer'
Convert that from req->buffer to bio_data(rq->bio). Apparently
my grep missed this one, and I don't build for Sega Dreamcast
enough.
Signed-off-by: Jens Axboe <axboe@fb.com>
Christoph Hellwig [Mon, 14 Apr 2014 08:30:12 +0000 (10:30 +0200)]
block: all blk-mq requests are tagged
Instead of setting the REQ_QUEUED flag on each of them just take it into
account in the only macro checking it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Christoph Hellwig [Tue, 15 Apr 2014 20:14:00 +0000 (14:14 -0600)]
blk-mq: split out tag initialization, support shared tags
Add a new blk_mq_tag_set structure that gets set up before we initialize
the queue. A single blk_mq_tag_set structure can be shared by multiple
queues.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Modular export of blk_mq_{alloc,free}_tagset added by me.
Signed-off-by: Jens Axboe <axboe@fb.com>
Christoph Hellwig [Mon, 14 Apr 2014 08:30:10 +0000 (10:30 +0200)]
blk-mq: initialize request on allocation
If we want to share tag and request allocation between queues we cannot
initialize the request at init/free time, but need to initialize it
at allocation time as it might get used for different queues over its
lifetime.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Christoph Hellwig [Tue, 15 Apr 2014 19:59:10 +0000 (13:59 -0600)]
blk-mq: add ->init_request and ->exit_request methods
The current blk_mq_init_commands/blk_mq_free_commands interface has a
two problems:
1) Because only the constructor is passed to blk_mq_init_commands there
is no easy way to clean up when a comman initialization failed. The
current code simply leaks the allocations done in the constructor.
2) There is no good place to call blk_mq_free_commands: before
blk_cleanup_queue there is no guarantee that all outstanding
commands have completed, so we can't free them yet. After
blk_cleanup_queue the queue has usually been freed. This can be
worked around by grabbing an unconditional reference before calling
blk_cleanup_queue and dropping it after blk_mq_free_commands is
done, although that's not exatly pretty and driver writers are
guaranteed to get it wrong sooner or later.
Both issues are easily fixed by making the request constructor and
destructor normal blk_mq_ops methods.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Christoph Hellwig [Mon, 14 Apr 2014 08:30:08 +0000 (10:30 +0200)]
blk-mq: make ->flush_rq fully transparent to drivers
Drivers shouldn't have to care about the block layer setting aside a
request to implement the flush state machine. We already override the
mq context and tag to make it more transparent, but so far haven't deal
with the driver private data in the request. Make sure to override this
as well, and while we're at it add a proper helper sitting in blk-mq.c
that implements the full impersonation.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Christoph Hellwig [Mon, 14 Apr 2014 08:30:07 +0000 (10:30 +0200)]
blk-mq: do not initialize req->special
Drivers can reach their private data easily using the blk_mq_rq_to_pdu
helper and don't need req->special. By not initializing it code can
be simplified nicely, and we also shave off a few more instructions from
the I/O path.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Christoph Hellwig [Mon, 14 Apr 2014 08:30:06 +0000 (10:30 +0200)]
blk-mq: initialize resid_len
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Jens Axboe [Thu, 10 Apr 2014 15:46:28 +0000 (09:46 -0600)]
block: remove struct request buffer member
This was used in the olden days, back when onions were proper
yellow. Basically it mapped to the current buffer to be
transferred. With highmem being added more than a decade ago,
most drivers map pages out of a bio, and rq->buffer isn't
pointing at anything valid.
Convert old style drivers to just use bio_data().
For the discard payload use case, just reference the page
in the bio.
Signed-off-by: Jens Axboe <axboe@fb.com>
Jens Axboe [Tue, 15 Apr 2014 20:02:24 +0000 (14:02 -0600)]
Merge tag 'v3.15-rc1' into for-3.16/core
We don't like this, but things have diverged with the blk-mq fixes
in 3.15-rc1. So merge it in.
Linus Torvalds [Sun, 13 Apr 2014 21:18:35 +0000 (14:18 -0700)]
Linux 3.15-rc1
Geert Uytterhoeven [Sun, 13 Apr 2014 18:46:22 +0000 (20:46 +0200)]
mm: Initialize error in shmem_file_aio_read()
Some versions of gcc even warn about it:
mm/shmem.c: In function ‘shmem_file_aio_read’:
mm/shmem.c:1414: warning: ‘error’ may be used uninitialized in this function
If the loop is aborted during the first iteration by one of the two
first break statements, error will be uninitialized.
Introduced by commit
6e58e79db8a1 ("introduce copy_page_to_iter, kill
loop over iovec in generic_file_aio_read()").
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Geert Uytterhoeven [Sun, 13 Apr 2014 18:46:21 +0000 (20:46 +0200)]
cifs: Use min_t() when comparing "size_t" and "unsigned long"
On 32 bit, size_t is "unsigned int", not "unsigned long", causing the
following warning when comparing with PAGE_SIZE, which is always "unsigned
long":
fs/cifs/file.c: In function ‘cifs_readdata_to_iov’:
fs/cifs/file.c:2757: warning: comparison of distinct pointer types lacks a cast
Introduced by commit
7f25bba819a3 ("cifs_iovec_read: keep iov_iter
between the calls of cifs_readdata_to_iov()"), which changed the
signedness of "remaining" and the code from min_t() to min().
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sun, 13 Apr 2014 20:28:13 +0000 (13:28 -0700)]
Merge branch 'slab/next' of git://git./linux/kernel/git/penberg/linux
Pull slab changes from Pekka Enberg:
"The biggest change is byte-sized freelist indices which reduces slab
freelist memory usage:
https://lkml.org/lkml/2013/12/2/64"
* 'slab/next' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux:
mm: slab/slub: use page->list consistently instead of page->lru
mm/slab.c: cleanup outdated comments and unify variables naming
slab: fix wrongly used macro
slub: fix high order page allocation problem with __GFP_NOFAIL
slab: Make allocations with GFP_ZERO slightly more efficient
slab: make more slab management structure off the slab
slab: introduce byte sized index for the freelist of a slab
slab: restrict the number of objects in a slab
slab: introduce helper functions to get/set free object
slab: factor out calculate nr objects in cache_estimate
Linus Torvalds [Sun, 13 Apr 2014 01:22:27 +0000 (18:22 -0700)]
Merge branch 'misc' of git://git./linux/kernel/git/mmarek/kbuild
Pull misc kbuild changes from Michal Marek:
"Here is the non-critical part of kbuild:
- One bogus coccinelle check removed, one check fixed not to suggest
the obsolete PTR_RET macro
- scripts/tags.sh does not index the generated *.mod.c files
- new objdiff tool to list differences between two versions of an
object file
- A fix for scripts/bootgraph.pl"
* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
scripts/coccinelle: Use PTR_ERR_OR_ZERO
scripts/bootgraph.pl: Add graphic header
scripts: objdiff: detect object code changes between two commits
Coccicheck: Remove memcpy to struct assignment test
scripts/tags.sh: Ignore *.mod.c
Mikulas Patocka [Wed, 9 Apr 2014 01:52:05 +0000 (21:52 -0400)]
sym53c8xx_2: Set DID_REQUEUE return code when aborting squeue
This patch fixes I/O errors with the sym53c8xx_2 driver when the disk
returns QUEUE FULL status.
When the controller encounters an error (including QUEUE FULL or BUSY
status), it aborts all not yet submitted requests in the function
sym_dequeue_from_squeue.
This function aborts them with DID_SOFT_ERROR.
If the disk has full tag queue, the request that caused the overflow is
aborted with QUEUE FULL status (and the scsi midlayer properly retries
it until it is accepted by the disk), but the sym53c8xx_2 driver aborts
the following requests with DID_SOFT_ERROR --- for them, the midlayer
does just a few retries and then signals the error up to sd.
The result is that disk returning QUEUE FULL causes request failures.
The error was reproduced on 53c895 with COMPAQ
BD03685A24 disk
(rebranded ST336607LC) with command queue 48 or 64 tags. The disk has
64 tags, but under some access patterns it return QUEUE FULL when there
are less than 64 pending tags. The SCSI specification allows returning
QUEUE FULL anytime and it is up to the host to retry.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: Matthew Wilcox <matthew@wil.cx>
Cc: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Paul Mackerras [Fri, 11 Apr 2014 06:43:35 +0000 (16:43 +1000)]
powerpc: Don't try to set LPCR unless we're in hypervisor mode
Commit
8f619b5429d9 ("powerpc/ppc64: Do not turn AIL (reloc-on
interrupts) too early") added code to set the AIL bit in the LPCR
without checking whether the kernel is running in hypervisor mode. The
result is that when the kernel is running as a guest (i.e., under
PowerKVM or PowerVM), the processor takes a privileged instruction
interrupt at that point, causing a panic. The visible result is that
the kernel hangs after printing "returning from prom_init".
This fixes it by checking for hypervisor mode being available before
setting LPCR. If we are not in hypervisor mode, we enable relocation-on
interrupts later in pSeries_setup_arch using the H_SET_MODE hcall.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Davidlohr Bueso [Wed, 9 Apr 2014 18:55:07 +0000 (11:55 -0700)]
futex: update documentation for ordering guarantees
Commits
11d4616bd07f ("futex: revert back to the explicit waiter
counting code") and
69cd9eba3886 ("futex: avoid race between requeue and
wake") changed some of the finer details of how we think about futexes.
One was a late fix and the other a consequence of overlooking the whole
requeuing logic.
The first change caused our documentation to be incorrect, and the
second made us aware that we need to explicitly add more details to it.
Signed-off-by: Davidlohr Bueso <davidlohr@hp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sun, 13 Apr 2014 00:31:22 +0000 (17:31 -0700)]
Merge git://git./linux/kernel/git/davem/net
Pull yet more networking updates from David Miller:
1) Various fixes to the new Redpine Signals wireless driver, from
Fariya Fatima.
2) L2TP PPP connect code takes PMTU from the wrong socket, fix from
Dmitry Petukhov.
3) UFO and TSO packets differ in whether they include the protocol
header in gso_size, account for that in skb_gso_transport_seglen().
From Florian Westphal.
4) If VLAN untagging fails, we double free the SKB in the bridging
output path. From Toshiaki Makita.
5) Several call sites of sk->sk_data_ready() were referencing an SKB
just added to the socket receive queue in order to calculate the
second argument via skb->len. This is dangerous because the moment
the skb is added to the receive queue it can be consumed in another
context and freed up.
It turns out also that none of the sk->sk_data_ready()
implementations even care about this second argument.
So just kill it off and thus fix all these use-after-free bugs as a
side effect.
6) Fix inverted test in tcp_v6_send_response(), from Lorenzo Colitti.
7) pktgen needs to do locking properly for LLTX devices, from Daniel
Borkmann.
8) xen-netfront driver initializes TX array entries in RX loop :-) From
Vincenzo Maffione.
9) After refactoring, some tunnel drivers allow a tunnel to be
configured on top itself. Fix from Nicolas Dichtel.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (46 commits)
vti: don't allow to add the same tunnel twice
gre: don't allow to add the same tunnel twice
drivers: net: xen-netfront: fix array initialization bug
pktgen: be friendly to LLTX devices
r8152: check RTL8152_UNPLUG
net: sun4i-emac: add promiscuous support
net/apne: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
net: ipv6: Fix oif in TCP SYN+ACK route lookup.
drivers: net: cpsw: enable interrupts after napi enable and clearing previous interrupts
drivers: net: cpsw: discard all packets received when interface is down
net: Fix use after free by removing length arg from sk_data_ready callbacks.
Drivers: net: hyperv: Address UDP checksum issues
Drivers: net: hyperv: Negotiate suitable ndis version for offload support
Drivers: net: hyperv: Allocate memory for all possible per-pecket information
bridge: Fix double free and memory leak around br_allowed_ingress
bonding: Remove debug_fs files when module init fails
i40evf: program RSS LUT correctly
i40evf: remove open-coded skb_cow_head
ixgb: remove open-coded skb_cow_head
igbvf: remove open-coded skb_cow_head
...
Linus Torvalds [Sun, 13 Apr 2014 00:26:45 +0000 (17:26 -0700)]
Merge tag 'blackfin-for-linus' of git://git./linux/kernel/git/realmz6/blackfin-linux
Pull blackfin updates from Steven Miao:
"Code cleanup, some previously ignored patches, and bug fixes"
* tag 'blackfin-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/realmz6/blackfin-linux:
blackfin: cleanup board files
bf609: clock: drop unused clock bit set/clear functions
Blackfin: bf537: rename "CONFIG_ADT75"
Blackfin: bf537: rename "CONFIG_AD7314"
Blackfin: bf537: rename ad2s120x ->ad2s1200
blackfin: bf537: fix typo "CONFIG_SND_SOC_ADV80X_MODULE"
blackfin: dma: current count mmr is read only
bfin_crc: Move architecture independant crc header file out of the blackfin folder.
bf54x: drop unuesd HOST status,control,timeout registers bit define macros
blackfin: portmux: cleanup head file
Blackfin: remove "config IP_CHECKSUM_L1"
blackfin: Remove GENERIC_GPIO config option again
blackfin:Use generic /proc/interrupts implementation
blackfin: bf60x: fix typo "CONFIG_PM_BFIN_WAKE_PA15_POL"
Linus Torvalds [Sun, 13 Apr 2014 00:23:12 +0000 (17:23 -0700)]
Merge tag 'remoteproc-3.15-cleanups' of git://git./linux/kernel/git/ohad/remoteproc
Pull remoteproc cleanups from Ohad Ben-Cohen:
"Several remoteproc cleanup patches coming from Jingoo Han, Julia
Lawall and Uwe Kleine-König"
* tag 'remoteproc-3.15-cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc:
remoteproc/ste_modem: staticize local symbols
remoteproc/davinci: simplify use of devm_ioremap_resource
remoteproc/davinci: drop needless devm_clk_put
Linus Torvalds [Sun, 13 Apr 2014 00:00:40 +0000 (17:00 -0700)]
Merge tag 'llvmlinux-for-v3.15' of git://git.linuxfoundation.org/llvmlinux/kernel
Pull llvm patches from Behan Webster:
"These are some initial updates to support compiling the kernel with
clang.
These patches have been through the proper reviews to the best of my
ability, and have been soaking in linux-next for a few weeks. These
patches by themselves still do not completely allow clang to be used
with the kernel code, but lay the foundation for other patches which
are still under review.
Several other of the LLVMLinux patches have been already added via
maintainer trees"
* tag 'llvmlinux-for-v3.15' of git://git.linuxfoundation.org/llvmlinux/kernel:
x86: LLVMLinux: Fix "incomplete type const struct x86cpu_device_id"
x86 kbuild: LLVMLinux: More cc-options added for clang
x86, acpi: LLVMLinux: Remove nested functions from Thinkpad ACPI
LLVMLinux: Add support for clang to compiler.h and new compiler-clang.h
LLVMLinux: Remove warning about returning an uninitialized variable
kbuild: LLVMLinux: Fix LINUX_COMPILER definition script for compilation with clang
Documentation: LLVMLinux: Update Documentation/dontdiff
kbuild: LLVMLinux: Adapt warnings for compilation with clang
kbuild: LLVMLinux: Add Kbuild support for building kernel with Clang
Linus Torvalds [Sat, 12 Apr 2014 23:51:08 +0000 (16:51 -0700)]
Merge branch 'for-next' of git://git./linux/kernel/git/nab/target-pending
Pull SCSI target updates from Nicholas Bellinger:
"Here are the target pending updates for v3.15-rc1. Apologies in
advance for waiting until the second to last day of the merge window
to send these out.
The highlights this round include:
- iser-target support for T10 PI (DIF) offloads (Sagi + Or)
- Fix Task Aborted Status (TAS) handling in target-core (Alex Leung)
- Pass in transport supported PI at session initialization (Sagi + MKP + nab)
- Add WRITE_INSERT + READ_STRIP T10 PI support in target-core (nab + Sagi)
- Fix iscsi-target ERL=2 ASYNC_EVENT connection pointer bug (nab)
- Fix tcm_fc use-after-free of ft_tpg (Andy Grover)
- Use correct ib_sg_dma primitives in ib_isert (Mike Marciniszyn)
Also, note the virtio-scsi + vhost-scsi changes to expose T10 PI
metadata into KVM guest have been left-out for now, as there where a
few comments from MST + Paolo that where not able to be addressed in
time for v3.15. Please expect this feature for v3.16-rc1"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (43 commits)
ib_srpt: Use correct ib_sg_dma primitives
target/tcm_fc: Rename ft_tport_create to ft_tport_get
target/tcm_fc: Rename ft_{add,del}_lport to {add,del}_wwn
target/tcm_fc: Rename structs and list members for clarity
target/tcm_fc: Limit to 1 TPG per wwn
target/tcm_fc: Don't export ft_lport_list
target/tcm_fc: Fix use-after-free of ft_tpg
target: Add check to prevent Abort Task from aborting itself
target: Enable READ_STRIP emulation in target_complete_ok_work
target/sbc: Add sbc_dif_read_strip software emulation
target: Enable WRITE_INSERT emulation in target_execute_cmd
target/sbc: Add sbc_dif_generate software emulation
target/sbc: Only expose PI read_cap16 bits when supported by fabric
target/spc: Only expose PI mode page bits when supported by fabric
target/spc: Only expose PI inquiry bits when supported by fabric
target: Pass in transport supported PI at session initialization
target/iblock: Fix double bioset_integrity_free bug
Target/sbc: Initialize COMPARE_AND_WRITE write_sg scatterlist
target/rd: T10-Dif: RAM disk is allocating more space than required.
iscsi-target: Fix ERL=2 ASYNC_EVENT connection pointer bug
...
Linus Torvalds [Sat, 12 Apr 2014 23:18:17 +0000 (16:18 -0700)]
Merge branch 'v4l_for_linus' of git://git./linux/kernel/git/mchehab/linux-media
Pull media fixes from Mauro Carvalho Chehab:
"A series of bug fix patches for v3.15-rc1. Most are just driver
fixes. There are some changes at remote controller core level, fixing
some definitions on a new API added for Kernel v3.15.
It also adds the missing include at include/uapi/linux/v4l2-common.h,
to allow its compilation on userspace, as pointed by you"
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (24 commits)
[media] gpsca: remove the risk of a division by zero
[media] stk1160: warrant a NUL terminated string
[media] v4l: ti-vpe: retain v4l2_buffer flags for captured buffers
[media] v4l: ti-vpe: Set correct field parameter for output and capture buffers
[media] v4l: ti-vpe: zero out reserved fields in try_fmt
[media] v4l: ti-vpe: Fix initial configuration queue data
[media] v4l: ti-vpe: Use correct bus_info name for the device in querycap
[media] v4l: ti-vpe: report correct capabilities in querycap
[media] v4l: ti-vpe: Allow usage of smaller images
[media] v4l: ti-vpe: Use video_device_release_empty
[media] v4l: ti-vpe: Make sure in job_ready that we have the needed number of dst_bufs
[media] lgdt3305: include sleep functionality in lgdt3304_ops
[media] drx-j: use customise option correctly
[media] m88rs2000: fix sparse static warnings
[media] r820t: fix size and init values
[media] rc-core: remove generic scancode filter
[media] rc-core: split dev->s_filter
[media] rc-core: do not change 32bit NEC scancode format for now
[media] rtl28xxu: remove duplicate ID 0458:707f Genius TVGo DVB-T03
[media] xc2028: add missing break to switch
...
Linus Torvalds [Sat, 12 Apr 2014 23:16:39 +0000 (16:16 -0700)]
Merge tag 'ntb-3.15' of git://github.com/jonmason/ntb
Pull PCIe non-transparent bridge fixes and features from Jon Mason:
"NTB driver bug fixes to address issues in list traversal, skb leak in
ntb_netdev, a typo, and a leak of msix entries in the error path.
Clean ups of the event handling logic, as well as a overall style
cleanup. Finally, the driver was converted to use the new
pci_enable_msix_range logic (and the refactoring to go along with it)"
* tag 'ntb-3.15' of git://github.com/jonmason/ntb:
ntb: Use pci_enable_msix_range() instead of pci_enable_msix()
ntb: Split ntb_setup_msix() into separate BWD/SNB routines
ntb: Use pci_msix_vec_count() to obtain number of MSI-Xs
NTB: Code Style Clean-up
NTB: client event cleanup
ntb: Fix leakage of ntb_device::msix_entries[] array
NTB: Fix typo in setting one translation register
ntb_netdev: Fix skb free issue in open
ntb_netdev: Fix list_for_each_entry exit issue
Linus Torvalds [Sat, 12 Apr 2014 22:39:53 +0000 (15:39 -0700)]
ceph: fix pr_fmt() redefinition
The vfs merge caused a latent bug to show up:
In file included from fs/ceph/super.h:4:0,
from fs/ceph/ioctl.c:3:
include/linux/ceph/ceph_debug.h:4:0: warning: "pr_fmt" redefined [enabled by default]
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^
In file included from include/linux/kernel.h:13:0,
from include/linux/uio.h:12,
from include/linux/socket.h:7,
from include/uapi/linux/in.h:22,
from include/linux/in.h:23,
from fs/ceph/ioctl.c:1:
include/linux/printk.h:214:0: note: this is the location of the previous definition
#define pr_fmt(fmt) fmt
^
where the reason is that <linux/ceph_debug.h> is included much too late
for the "pr_fmt()" define.
The include of <linux/ceph_debug.h> needs to be the first include in the
file, but fs/ceph/ioctl.c had for some reason missed that, and it wasn't
noticeable until some unrelated header file changes brought in an
indirect earlier include of <linux/kernel.h>.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 12 Apr 2014 21:49:50 +0000 (14:49 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs
Pull vfs updates from Al Viro:
"The first vfs pile, with deep apologies for being very late in this
window.
Assorted cleanups and fixes, plus a large preparatory part of iov_iter
work. There's a lot more of that, but it'll probably go into the next
merge window - it *does* shape up nicely, removes a lot of
boilerplate, gets rid of locking inconsistencie between aio_write and
splice_write and I hope to get Kent's direct-io rewrite merged into
the same queue, but some of the stuff after this point is having
(mostly trivial) conflicts with the things already merged into
mainline and with some I want more testing.
This one passes LTP and xfstests without regressions, in addition to
usual beating. BTW, readahead02 in ltp syscalls testsuite has started
giving failures since "mm/readahead.c: fix readahead failure for
memoryless NUMA nodes and limit readahead pages" - might be a false
positive, might be a real regression..."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits)
missing bits of "splice: fix racy pipe->buffers uses"
cifs: fix the race in cifs_writev()
ceph_sync_{,direct_}write: fix an oops on ceph_osdc_new_request() failure
kill generic_file_buffered_write()
ocfs2_file_aio_write(): switch to generic_perform_write()
ceph_aio_write(): switch to generic_perform_write()
xfs_file_buffered_aio_write(): switch to generic_perform_write()
export generic_perform_write(), start getting rid of generic_file_buffer_write()
generic_file_direct_write(): get rid of ppos argument
btrfs_file_aio_write(): get rid of ppos
kill the 5th argument of generic_file_buffered_write()
kill the 4th argument of __generic_file_aio_write()
lustre: don't open-code kernel_recvmsg()
ocfs2: don't open-code kernel_recvmsg()
drbd: don't open-code kernel_recvmsg()
constify blk_rq_map_user_iov() and friends
lustre: switch to kernel_sendmsg()
ocfs2: don't open-code kernel_sendmsg()
take iov_iter stuff to mm/iov_iter.c
process_vm_access: tidy up a bit
...
David S. Miller [Sat, 12 Apr 2014 21:03:20 +0000 (17:03 -0400)]
Merge branch 'tunnels'
Nicolas Dichtel says:
====================
tunnels: don't allow to add the same tunnel twice
This series fixes the check of an existing tunnel with the same
parameters when a new tunnel is added. I've checked all users of
ip_tunnel_newlink(): gre, gretap, ipip and vti. The bug exists only
for gre and vti.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Nicolas Dichtel [Fri, 11 Apr 2014 13:51:19 +0000 (15:51 +0200)]
vti: don't allow to add the same tunnel twice
Before the patch, it was possible to add two times the same tunnel:
ip l a vti1 type vti remote 10.16.0.121 local 10.16.0.249 key 41
ip l a vti2 type vti remote 10.16.0.121 local 10.16.0.249 key 41
It was possible, because ip_tunnel_newlink() calls ip_tunnel_find() with the
argument dev->type, which was set only later (when calling ndo_init handler
in register_netdevice()). Let's set this type in the setup handler, which is
called before newlink handler.
Introduced by commit
b9959fd3b0fa ("vti: switch to new ip tunnel code").
CC: Cong Wang <amwang@redhat.com>
CC: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Nicolas Dichtel [Fri, 11 Apr 2014 13:51:18 +0000 (15:51 +0200)]
gre: don't allow to add the same tunnel twice
Before the patch, it was possible to add two times the same tunnel:
ip l a gre1 type gre remote 10.16.0.121 local 10.16.0.249
ip l a gre2 type gre remote 10.16.0.121 local 10.16.0.249
It was possible, because ip_tunnel_newlink() calls ip_tunnel_find() with the
argument dev->type, which was set only later (when calling ndo_init handler
in register_netdevice()). Let's set this type in the setup handler, which is
called before newlink handler.
Introduced by commit
c54419321455 ("GRE: Refactor GRE tunneling code.").
CC: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Vincenzo Maffione [Sat, 12 Apr 2014 09:55:40 +0000 (11:55 +0200)]
drivers: net: xen-netfront: fix array initialization bug
This patch fixes the initialization of an array used in the TX
datapath that was mistakenly initialized together with the
RX datapath arrays. An out of range array access could happen
when RX and TX rings had different sizes.
Signed-off-by: Vincenzo Maffione <v.maffione@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sat, 12 Apr 2014 20:36:44 +0000 (16:36 -0400)]
Merge branch 'master' of git://git./linux/kernel/git/jkirsher/net
Jeff Kirsher says:
====================
Intel Wired LAN Driver Updates
This series contains updates to e1000, e1000e, igb, igbvf, ixgb, ixgbe,
ixgbevf and i40evf.
Mark fixes an issue with ixgbe and ixgbevf by adding a bit to indicate
when workqueues have been initialized. This permits the register read
error handling from attempting to use them prior to that, which also
generates warnings. Checking for a detected removal after initializing
the work queues allows the probe function to return an error without
getting the workqueue involved. Further, if the error_detected
callback is entered before the workqueues are initialized, exit without
recovery since the device initialization was so truncated.
Francois Romieu provides several patches to all the drivers to remove
the open coded skb_cow_head.
Jakub Kicinski provides a fix for igb where last_rx_timestamp should be
updated only when Rx time stamp is read.
Mitch provides a fix for i40evf where a recent change broke the RSS LUT
programming causing it to be programmed with all 0's.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Sat, 12 Apr 2014 20:06:10 +0000 (13:06 -0700)]
Merge tag 'trace-3.15-v2' of git://git./linux/kernel/git/rostedt/linux-trace
Pull more tracing updates from Steven Rostedt:
"This includes the final patch to clean up and fix the issue with the
design of tracepoints and how a user could register a tracepoint and
have that tracepoint not be activated but no error was shown.
The design was for an out of tree module but broke in tree users. The
clean up was to remove the saving of the hash table of tracepoint
names such that they can be enabled before they exist (enabling a
module tracepoint before that module is loaded). This added more
complexity than needed. The clean up was to remove that code and just
enable tracepoints that exist or fail if they do not.
This removed a lot of code as well as the complexity that it brought.
As a side effect, instead of registering a tracepoint by its name, the
tracepoint needs to be registered with the tracepoint descriptor.
This removes having to duplicate the tracepoint names that are
enabled.
The second patch was added that simplified the way modules were
searched for.
This cleanup required changes that were in the 3.15 queue as well as
some changes that were added late in the 3.14-rc cycle. This final
change waited till the two were merged in upstream and then the change
was added and full tests were run. Unfortunately, the test found some
errors, but after it was already submitted to the for-next branch and
not to be rebased. Sparse errors were detected by Fengguang Wu's bot
tests, and my internal tests discovered that the anonymous union
initialization triggered a bug in older gcc compilers. Luckily, there
was a bugzilla for the gcc bug which gave a work around to the
problem. The third and fourth patch handled the sparse error and the
gcc bug respectively.
A final patch was tagged along to fix a missing documentation for the
README file"
* tag 'trace-3.15-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Add missing function triggers dump and cpudump to README
tracing: Fix anonymous unions in struct ftrace_event_call
tracepoint: Fix sparse warnings in tracepoint.c
tracepoint: Simplify tracepoint module search
tracepoint: Use struct pointer instead of name hash for reg/unreg tracepoints
Linus Torvalds [Sat, 12 Apr 2014 19:38:53 +0000 (12:38 -0700)]
Merge git://git.infradead.org/users/eparis/audit
Pull audit updates from Eric Paris.
* git://git.infradead.org/users/eparis/audit: (28 commits)
AUDIT: make audit_is_compat depend on CONFIG_AUDIT_COMPAT_GENERIC
audit: renumber AUDIT_FEATURE_CHANGE into the 1300 range
audit: do not cast audit_rule_data pointers pointlesly
AUDIT: Allow login in non-init namespaces
audit: define audit_is_compat in kernel internal header
kernel: Use RCU_INIT_POINTER(x, NULL) in audit.c
sched: declare pid_alive as inline
audit: use uapi/linux/audit.h for AUDIT_ARCH declarations
syscall_get_arch: remove useless function arguments
audit: remove stray newline from audit_log_execve_info() audit_panic() call
audit: remove stray newlines from audit_log_lost messages
audit: include subject in login records
audit: remove superfluous new- prefix in AUDIT_LOGIN messages
audit: allow user processes to log from another PID namespace
audit: anchor all pid references in the initial pid namespace
audit: convert PPIDs to the inital PID namespace.
pid: get pid_t ppid of task in init_pid_ns
audit: rename the misleading audit_get_context() to audit_take_context()
audit: Add generic compat syscall support
audit: Add CONFIG_HAVE_ARCH_AUDITSYSCALL
...
Al Viro [Fri, 11 Apr 2014 16:01:03 +0000 (12:01 -0400)]
missing bits of "splice: fix racy pipe->buffers uses"
that commit has fixed only the parts of that mess in fs/splice.c itself;
there had been more in several other ->splice_read() instances...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 3 Apr 2014 14:27:17 +0000 (10:27 -0400)]
cifs: fix the race in cifs_writev()
O_APPEND handling there hadn't been completely fixed by Pavel's
patch; it checks the right value, but it's racy - we can't really
do that until i_mutex has been taken.
Fix by switching to __generic_file_aio_write() (open-coding
generic_file_aio_write(), actually) and pulling mutex_lock() above
inode_size_read().
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 4 Apr 2014 02:44:19 +0000 (22:44 -0400)]
ceph_sync_{,direct_}write: fix an oops on ceph_osdc_new_request() failure
ceph_osdc_put_request(ERR_PTR(-error)) oopses. What we want there
is break, not goto out.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Daniel Borkmann [Fri, 11 Apr 2014 11:22:00 +0000 (13:22 +0200)]
pktgen: be friendly to LLTX devices
Similarly to commit
43279500deca ("packet: respect devices with
LLTX flag in direct xmit"), we can basically apply the very same
to pktgen. This will help testing against LLTX devices such as
dummy driver (or others), which only have a single netdevice txq
and would otherwise require locking their txq from pktgen side
while e.g. in dummy case, we would not need any locking. Fix this
by making use of HARD_TX_{UN,}LOCK API, so that NETIF_F_LLTX will
be respected.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hayeswang [Fri, 11 Apr 2014 09:54:31 +0000 (17:54 +0800)]
r8152: check RTL8152_UNPLUG
When the device is unplugged, the driver would try to disable the
device. Add checking the flag of RTL8152_UNPLUG to skip setting
the device when it is unplugged. This could shorten the time of
unloading the driver.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Marc Zyngier [Fri, 11 Apr 2014 09:46:17 +0000 (10:46 +0100)]
net: sun4i-emac: add promiscuous support
The sun4i-emac driver is rather primitive, and doesn't support
promiscuous mode. This makes usage such as bridging impossible,
which is a shame on virtualization capable HW such as the
Allwinner A20.
The fix is fairly simple: move the RX setup code to the ndo_set_rx_mode
vector, and add the required HW configuration when IFF_PROMISC is passed
by the core code.
This has been tested on a generic A20 box running a few virtual
machines hanging off a bridge with the EMAC chip as the link to the
outside world.
Cc: Stefan Roese <sr@denx.de>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Stefan Roese <sr@denx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Duan Jiong [Fri, 11 Apr 2014 08:37:37 +0000 (16:37 +0800)]
net/apne: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
This patch fixes coccinelle error regarding usage of IS_ERR and
PTR_ERR instead of PTR_ERR_OR_ZERO.
Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Steven Miao [Fri, 11 Apr 2014 18:07:27 +0000 (02:07 +0800)]
blackfin: cleanup board files
using IS_ENABLED() macro instead of defined(CONFIG_XXX) || defined(CONFIG_XXX_MODULE)
Signed-off-by: Steven Miao <realmz6@gmail.com>
Steven Miao [Fri, 11 Apr 2014 15:54:25 +0000 (23:54 +0800)]
bf609: clock: drop unused clock bit set/clear functions
Signed-off-by: Steven Miao <realmz6@gmail.com>
Paul Bolle [Thu, 4 Apr 2013 10:31:06 +0000 (12:31 +0200)]
Blackfin: bf537: rename "CONFIG_ADT75"
In v3.2 the Analog Devices ADT75 temperature sensor driver was removed
as an IIO driver and support for it was added to the LM75 HWMON driver.
But it was apparently overlooked to rename one reference to CONFIG_ADT75
to CONFIG_SENSORS_LM75. Do so now. Use the IS_ENABLED() macro, while
we're at it.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Paul Bolle [Thu, 4 Apr 2013 10:08:25 +0000 (12:08 +0200)]
Blackfin: bf537: rename "CONFIG_AD7314"
In v3.2 the Analog Devices AD7314 temperature sensor driver was removed
as an IIO driver and added as a HWMON driver. But it was apparently
overlooked to rename two references to CONFIG_AD7314 to
CONFIG_SENSORS_AD7314. Do so now. Use the IS_ENABLED() macro, while
we're at it.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Paul Bolle [Thu, 4 Apr 2013 11:02:10 +0000 (13:02 +0200)]
Blackfin: bf537: rename ad2s120x ->ad2s1200
In v3.2 the Analog Devices ad2s1200/ad2s1205 driver was renamed from
ad2s120x to ad2s1200. But it apparently forgot to rename the references
to this driver in the BF537-STAMP code. Rename these now, and use the
IS_ENABLED() macro, while we're at it.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Paul Bolle [Fri, 8 Mar 2013 12:06:13 +0000 (13:06 +0100)]
blackfin: bf537: fix typo "CONFIG_SND_SOC_ADV80X_MODULE"
There's a (rather subtle) typo in "CONFIG_SND_SOC_ADV80X_MODULE". Fix it
once and for all by using IS_ENABLED(), which is designed to avoid
issues like this.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Sonic Zhang [Wed, 2 Apr 2014 08:57:23 +0000 (16:57 +0800)]
blackfin: dma: current count mmr is read only
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Sonic Zhang [Thu, 27 Mar 2014 08:34:31 +0000 (16:34 +0800)]
bfin_crc: Move architecture independant crc header file out of the blackfin folder.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Steven Miao <realmz6@gmail.com>
Steven Miao [Mon, 17 Mar 2014 06:49:26 +0000 (14:49 +0800)]
bf54x: drop unuesd HOST status,control,timeout registers bit define macros
Signed-off-by: Steven Miao <realmz6@gmail.com>
Steven Miao [Mon, 17 Mar 2014 05:36:51 +0000 (13:36 +0800)]
blackfin: portmux: cleanup head file
drop unused head file
change pinmux request/free macro for backward compatiblity
add function declaration
Signed-off-by: Steven Miao <realmz6@gmail.com>
Linus Torvalds [Sat, 12 Apr 2014 00:23:52 +0000 (17:23 -0700)]
Merge branch 'async-scsi-resume' of git://git./linux/kernel/git/djbw/isci
Pull async SCSI resume support from Dan Williams:
"Allow disks and other devices to resume in parallel.
This provides a tangible speed up for a non-esoteric use case (laptop
resume):
https://01.org/suspendresume/blogs/tebrandt/2013/hard-disk-resume-optimization-simpler-approach"
* 'async-scsi-resume' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/isci:
scsi: async sd resume
Linus Torvalds [Sat, 12 Apr 2014 00:20:38 +0000 (17:20 -0700)]
Merge tag 'md/3.15' of git://neil.brown.name/md
Pull md updates from Neil Brown:
"Just a few md patches for the 3.15 merge window.
Not much happening in md/raid at the moment. Just a few bug fixes
(one for -stable) and a couple of performance tweaks"
* tag 'md/3.15' of git://neil.brown.name/md:
raid5: get_active_stripe avoids device_lock
raid5: make_request does less prepare wait
md: avoid oops on unload if some process is in poll or select.
md/raid1: r1buf_pool_alloc: free allocate pages when subsequent allocation fails.
md/bitmap: don't abuse i_writecount for bitmap files.
Linus Torvalds [Fri, 11 Apr 2014 23:45:59 +0000 (16:45 -0700)]
Merge git://git.infradead.org/users/willy/linux-nvme
Pull NVMe driver updates from Matthew Wilcox:
"Various updates to the NVMe driver. The most user-visible change is
that drive hotplugging now works and CPU hotplug while an NVMe drive
is installed should also work better"
* git://git.infradead.org/users/willy/linux-nvme:
NVMe: Retry failed commands with non-fatal errors
NVMe: Add getgeo to block ops
NVMe: Start-stop nvme_thread during device add-remove.
NVMe: Make I/O timeout a module parameter
NVMe: CPU hot plug notification
NVMe: per-cpu io queues
NVMe: Replace DEFINE_PCI_DEVICE_TABLE
NVMe: Fix divide-by-zero in nvme_trans_io_get_num_cmds
NVMe: IOCTL path RCU protect queue access
NVMe: RCU protected access to io queues
NVMe: Initialize device reference count earlier
NVMe: Add CONFIG_PM_SLEEP to suspend/resume functions
Linus Torvalds [Fri, 11 Apr 2014 23:36:50 +0000 (16:36 -0700)]
Merge git://git.kvack.org/~bcrl/aio-next
Pull aio ctx->ring_pages migration serialization fix from Ben LaHaise.
* git://git.kvack.org/~bcrl/aio-next:
aio: v4 ensure access to ctx->ring_pages is correctly serialised for migration
Mike Marciniszyn [Mon, 7 Apr 2014 17:58:35 +0000 (13:58 -0400)]
ib_srpt: Use correct ib_sg_dma primitives
The code was incorrectly using sg_dma_address() and
sg_dma_len() instead of ib_sg_dma_address() and
ib_sg_dma_len().
This prevents srpt from functioning with the
Intel HCA and indeed will corrupt memory
badly.
Cc: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Tested-by: Vinod Kumar <vinod.kumar@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Cc: stable@vger.kernel.org # 3.3+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Andy Grover [Fri, 4 Apr 2014 23:54:15 +0000 (16:54 -0700)]
target/tcm_fc: Rename ft_tport_create to ft_tport_get
Because it doesn't always create, if there's an existing one it just
returns it.
Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Andy Grover [Fri, 4 Apr 2014 23:54:14 +0000 (16:54 -0700)]
target/tcm_fc: Rename ft_{add,del}_lport to {add,del}_wwn
These functions are not adding or deleting an lport. They are adding a
wwn that may match with an lport that is present on the system.
Renaming ft_del_lport also means we won't have functions named
both ft_del_lport and ft_lport_del any more.
Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Andy Grover [Fri, 4 Apr 2014 23:54:13 +0000 (16:54 -0700)]
target/tcm_fc: Rename structs and list members for clarity
Rename struct ft_lport_acl to ft_lport_wwn. "acl" is associated with
something different in LIO terms. Really, ft_lport_wwn is the
fabric-specific wrapper for the struct se_wwn.
Rename "lacl" local variables to "ft_wwn" as well.
Rename list_heads used as list members to make it clear they're nodes, not
heads.
Rename lport_node to ft_wwn_node.
Rename ft_lport_list to ft_wwn_list
Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Andy Grover [Fri, 4 Apr 2014 23:54:12 +0000 (16:54 -0700)]
target/tcm_fc: Limit to 1 TPG per wwn
tcm_fc doesn't support multiple TPGs per wwn. For proof, see
ft_lport_find_tpg. Enforce this in the code.
Replace ft_lport_wwn.tpg_list with a single pointer. We can't fold ft_tpg
into ft_lport_wwn because they can have different lifetimes.
Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Andy Grover [Fri, 4 Apr 2014 23:54:11 +0000 (16:54 -0700)]
target/tcm_fc: Don't export ft_lport_list
Nobody outside tfc_conf.c uses it.
Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Andy Grover [Fri, 4 Apr 2014 23:44:37 +0000 (16:44 -0700)]
target/tcm_fc: Fix use-after-free of ft_tpg
ft_del_tpg checks tpg->tport is set before unlinking the tpg from the
tport when the tpg is being removed. Set this pointer in ft_tport_create,
or the unlinking won't happen in ft_del_tpg and tport->tpg will reference
a deleted object.
This patch sets tpg->tport in ft_tport_create, because that's what
ft_del_tpg checks, and is the only way to get back to the tport to
clear tport->tpg.
The bug was occuring when:
- lport created, tport (our per-lport, per-provider context) is
allocated.
tport->tpg = NULL
- tpg created
- a PRLI is received. ft_tport_create is called, tpg is found and
tport->tpg is set
- tpg removed. ft_tpg is freed in ft_del_tpg. Since tpg->tport was not
set, tport->tpg is not cleared and points at freed memory
- Future calls to ft_tport_create return tport via first conditional,
instead of searching for new tpg by calling ft_lport_find_tpg.
tport->tpg is still invalid, and will access freed memory.
see https://bugzilla.redhat.com/show_bug.cgi?id=1071340
Cc: stable@vger.kernel.org # 3.0+
Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Alex Leung [Fri, 4 Apr 2014 04:38:19 +0000 (04:38 +0000)]
target: Add check to prevent Abort Task from aborting itself
This patch addresses an issue that occurs when an ABTS is received
for an se_cmd that completes just before the sess_cmd_list is searched
in core_tmr_abort_task(). When the sess_cmd_list is searched, since
the ABTS and the FCP_CMND being aborted (that just completed) both
have the same OXID, TFO->get_task_tag(TMR) returns a value that
matches tmr->ref_task_tag (from TFO->get_task_tag(FCP_CMND)), and
the Abort Task tries to abort itself. When this occurs,
transport_wait_for_tasks() hangs forever since the TMR is waiting
for itself to finish.
This patch adds a check to core_tmr_abort_task() to make sure the
TMR does not attempt to abort itself.
Signed-off-by: Alex Leung <alex.leung@emulex.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Linus Torvalds [Fri, 11 Apr 2014 21:16:53 +0000 (14:16 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mason/linux-btrfs
Pull second set of btrfs updates from Chris Mason:
"The most important changes here are from Josef, fixing a btrfs
regression in 3.14 that can cause corruptions in the extent allocation
tree when snapshots are in use.
Josef also fixed some deadlocks in send/recv and other assorted races
when balance is running"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (23 commits)
Btrfs: fix compile warnings on on avr32 platform
btrfs: allow mounting btrfs subvolumes with different ro/rw options
btrfs: export global block reserve size as space_info
btrfs: fix crash in remount(thread_pool=) case
Btrfs: abort the transaction when we don't find our extent ref
Btrfs: fix EINVAL checks in btrfs_clone
Btrfs: fix unlock in __start_delalloc_inodes()
Btrfs: scrub raid56 stripes in the right way
Btrfs: don't compress for a small write
Btrfs: more efficient io tree navigation on wait_extent_bit
Btrfs: send, build path string only once in send_hole
btrfs: filter invalid arg for btrfs resize
Btrfs: send, fix data corruption due to incorrect hole detection
Btrfs: kmalloc() doesn't return an ERR_PTR
Btrfs: fix snapshot vs nocow writting
btrfs: Change the expanding write sequence to fix snapshot related bug.
btrfs: make device scan less noisy
btrfs: fix lockdep warning with reclaim lock inversion
Btrfs: hold the commit_root_sem when getting the commit root during send
Btrfs: remove transaction from send
...
Linus Torvalds [Fri, 11 Apr 2014 21:14:57 +0000 (14:14 -0700)]
Merge tag 'for-linus-3.15' of git://git./linux/kernel/git/ericvh/v9fs
Pull 9p changes from Eric Van Hensbergen:
"A bunch of updates and cleanup within the transport layer,
particularly with a focus on RDMA"
* tag 'for-linus-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
9pnet_rdma: check token type before int conversion
9pnet: trans_fd : allocate struct p9_trans_fd and struct p9_conn together.
9pnet: p9_client->conn field is unused. Remove it.
9P: Get rid of REQ_STATUS_FLSH
9pnet_rdma: add cancelled()
9pnet_rdma: update request status during send
9P: Add cancelled() to the transport functions.
net: Mark function as static in 9p/client.c
9P: Add memory barriers to protect request fields over cb/rpc threads handoff