Commit Graph

379 Commits

Author SHA1 Message Date
Li Zefan
c7482b81c8 IB: Fix return value in ib_device_register_sysfs()
If kobject_create_and_add() fails and returns NULL, the current code
in ib_device_register_sysfs() does not set ret and hence returns 0.
Set ret to -ENOMEM for this failure, so that the caller knows that
ib_device_register_sysfs() actually failed.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-02-15 15:05:05 -08:00
Sean Hefty
ead595aeb0 RDMA/cma: Do not issue MRA if user rejects connection request
There's an undesirable interaction with issuing MRA requests to
increase connection timeouts and the listen backlog.

When the rdma_cm receives a connection request, it queues an MRA with
the ib_cm.  (The ib_cm will send an MRA if it receives a duplicate
REQ.)  The rdma_cm will then create a new rdma_cm_id and give that to
the user, which in this case is the rdma_user_cm.

If the listen backlog maintained in the rdma_user_cm is full, it
destroys the rdma_cm_id, which in turns destroys the ib_cm_id.  The
ib_cm_id generates a REJ because the state of the ib_cm_id has changed
to MRA sent, versus REQ received.  When the backlog is full, we just
want to drop the REQ so that it is retried later.

Fix this by deferring queuing the MRA until after the user of the
rdma_cm has examined the connection request.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-02-14 15:30:41 -08:00
Roland Dreier
7c7a9bccd2 IB/cm: Fix infiniband_cm class kobject ref counting
Commit 9af57b7a ("IB/cm: Add basic performance counters") introduced a
bug in how the reference count for cm_class.subsys.kobj was handled:
the path that released a device did a kobject_put() on that kobject, but
there was no kobject_get() in the path the handles adding a device.  So
the reference count ended up too low, which leads to bad things.  Fix up
and simplify the reference counting to avoid this.

(Actually, I introduced the bug when fixing the patch up to match some
of Greg's kobject changes, but who's counting)

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-02-12 14:38:27 -08:00
Roland Dreier
ab64b96067 IB/cm: Remove debug printk()s that snuck upstream
Pesky little devils, sneaking around...

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-02-12 14:38:27 -08:00
Or Gerlitz
1d96354e61 IB/fmr_pool: Allocate page list for pool FMRs only when caching enabled
Allocate memory for the page_list field of struct ib_pool_fmr only
when caching is enabled for the FMR pool, since the field is not used
otherwise.  This can save significant amounts of memory for large
pools with caching turned off.

Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-02-04 20:20:44 -08:00
Sean Hefty
3971c9f6db IB/cm: Add interim support for routed paths
Paths with hop_limit > 1 indicate that the connection will be routed
between IB subnets.  Update the subnet local field in the CM REQ based
on the hop_limit value.  In addition, if the path is routed, then set
the LIDs in the REQ to the permissive LIDs.  This is used to indicate
to the passive side that it should use the LIDs in the received local
route header (LRH) associated with the REQ when programming the QP.

This is a temporary work-around to the IB CM to support IB router
development until the IB router specification is completed.  It is not
anticipated that this work-around will cause any interoperability
issues with existing stacks or future stacks that will properly
support IB routers when defined.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-02-04 20:20:42 -08:00
Denis V. Lunev
f206351a50 [NETNS]: Add namespace parameter to ip_route_output_key.
Needed to propagate it down to the ip_route_output_flow.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:11:07 -08:00
Denis V. Lunev
1ab352768f [NETNS]: Add namespace parameter to ip_dev_find.
in_dev_find() need a namespace to pass it to fib_get_table(), so add
an argument.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:11:04 -08:00
Joe Perches
6360a02af1 [IPV4] drivers/infiniband: Use ipv4_is_<type>
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:58:17 -08:00
Olaf Kirch
a3cd7d9070 IB/fmr_pool: ib_fmr_pool_flush() should flush all dirty FMRs
When a FMR is released via ib_fmr_pool_unmap(), the FMR usually ends
up on the free_list rather than the dirty_list (because we allow a
certain number of remappings before actually requiring a flush).

However, ib_fmr_batch_release() only looks at dirty_list when flushing
out old mappings.  This means that when ib_fmr_pool_flush() is used to
force a flush of the FMR pool, some dirty FMRs that have not reached
their maximum remap count will not actually be flushed.

Fix this by flushing all FMRs that have been used at least once in
ib_fmr_batch_release().

Signed-off-by: Olaf Kirch <olaf.kirch@oracle.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-01-25 14:15:43 -08:00
Olaf Kirch
a656eb758f IB/fmr_pool: Flush serial numbers can get out of sync
Normally, the serial numbers for flush requests and flushes executed
for an FMR pool should be in sync.

However, if the FMR pool flushes dirty FMRs because the
dirty_watermark was reached, we wake up the cleanup thread and let it
do its stuff.  As a side effect, the cleanup thread increments
pool->flush_ser, which leaves it one higher than pool->req_ser.  The
next time the user calls ib_flush_fmr_pool(), the cleanup thread will
be woken up, but ib_flush_fmr_pool() won't wait for the flush to
complete because flush_ser is already past req_ser.  This means the
FMRs that the user expects to be flushed may not have all been flushed
when the function returns.

Fix this by telling the cleanup thread to do work exclusively by
incrementing req_ser, and by moving the comparison of dirty_len and
dirty_watermark into ib_fmr_pool_unmap().

Signed-off-by: Olaf Kirch <olaf.kirch@oracle.com>
2008-01-25 14:15:42 -08:00
Roland Dreier
2fe7e6f7c9 IB/umad: Simplify and fix locking
In addition to being overly complex, the locking in user_mad.c is
broken: there were multiple reports of deadlocks and lockdep warnings.
In particular it seems that a single thread may end up trying to take
the same rwsem for reading more than once, which is explicitly
forbidden in the comments in <linux/rwsem.h>.

To solve this, we change the locking to use plain mutexes instead of
rwsems.  There is one mutex per open file, which protects the contents
of the struct ib_umad_file, including the array of agents and list of
queued packets; and there is one mutex per struct ib_umad_port, which
protects the contents, including the list of open files.  We never
hold the file mutex across calls to functions like ib_unregister_mad_agent(),
which can call back into other ib_umad code to queue a packet, and we
always hold the port mutex as long as we need to make sure that a
device is not hot-unplugged from under us.

This even makes things nicer for users of the -rt patch, since we
remove calls to downgrade_write() (which is not implemented in -rt).

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-01-25 14:15:42 -08:00
Sean Hefty
5851bb893e RDMA/cma: Override default responder_resources with user value
By default, the responder_resources parameter is set to that received
in a connection request.  The passive side may override this value
when accepting the connection.  Use the value provided by the passive
side when transitioning the QP to RTR state, rather than the value
given in the connect request.  Without this change, the RTR transition
may fail if the passive side supports fewer responder_resources than
that in the request.

For code consistency and to protect against QP destruction, restructure
overriding initiator_depth to match how responder_resources is set.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-01-25 14:15:41 -08:00
Rolf Manderscheid
a9e527e3f9 IPoIB: improve IPv4/IPv6 to IB mcast mapping functions
An IPoIB subnet on an IB fabric that spans multiple IB subnets can't
use link-local scope in multicast GIDs.  The existing routines that
map IP/IPv6 multicast addresses into IB link-level addresses hard-code
the scope to link-local, and they also leave the partition key field
uninitialised.  This patch adds a parameter (the link-level broadcast
address) to the mapping routines, allowing them to initialise both the
scope and the P_Key appropriately, and fixes up the call sites.

The next step will be to add a way to configure the scope for an IPoIB
interface.

Signed-off-by: Rolf Manderscheid <rvm@obsidianresearch.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-01-25 14:15:37 -08:00
Sean Hefty
88314e4dda RDMA/cma: add support for rdma_migrate_id()
This is based on user feedback from Doug Ledford at RedHat:

Events that occur on an rdma_cm_id are reported to userspace through an
event channel.  Connection request events are reported on the event
channel associated with the listen.  When the connection is accepted, a
new rdma_cm_id is created and automatically uses the listen event
channel.  This is suboptimal where the user only wants listen events on
that channel.

Additionally, it may be desirable to have events related to connection
establishment use a different event channel than those related to
already established connections.

Allow the user to migrate an rdma_cm_id between event channels. All
pending events associated with the rdma_cm_id are moved to the new event
channel.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-01-25 14:15:32 -08:00
Vladimir Sokolovsky
45d9478da1 RDMA/cma: Reenable device removal on passive side
Enable conn_id remove on the passive side after connection
establishment.  This corrects an issue where the IB driver can't be
unloaded after running applications over RDS.  The 'dev_remove' counter
does not reach 0 for established connections on the passive side.

This problem is limited to device removal, and only occurs on the
passive side if there are established connections.

Signed-off-by: Vladimir Sokolovsky <vlad@mellanox.co.il>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-01-25 14:15:31 -08:00
Sean Hefty
b61d92d8ae IB/mad: Fix incorrect access to items on local_list
In cancel_mads(), MADs are moved from the wait_list and local_list
to a cancel_list for processing.  However, the structures on these two
lists are not the same.  The wait_list references struct
ib_mad_send_wr_private, but local_list references struct
ib_mad_local_private.  Cancel_mads() treats all items moved to the
cancel_list as struct ib_mad_send_wr_private.  This leads to a system
crash when requests are moved from the local_list to the cancel_list.

Fix this by leaving local_list alone.  All requests on the local_list
have completed are just awaiting processing by a queued worker thread.

Bug (crash) reported by Dotan Barak <dotanb@dev.mellanox.co.il>.
Problem with local_list access reported by Robert Reynolds
<rreynolds@opengridcomputing.com>.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-01-25 14:15:31 -08:00
Sean Hefty
9af57b7a27 IB/cm: Add basic performance counters
Add performance/debug counters to track sent/received messages, retries,
and duplicates.  Counters are tracked per CM message type, per port.

The counters are always enabled, so intrusive state tracking is not done.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-01-25 14:15:30 -08:00
Sean Hefty
4fc8cd4919 IB/mad: Report number of times a mad was retried
To allow ULPs to tune timeout values and capture retry statistics,
report the number of times that a mad send operation was retried.

For RMPP mads, report the total number of times that the any portion
(send window) of the send operation was retried.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-01-25 14:15:30 -08:00
Sean Hefty
547af76521 IB/multicast: Report errors on multicast groups if P_key changes
P_key changes can invalidate multicast groups.  Report errors on all
multicast groups affected by a pkey change.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-01-25 14:15:29 -08:00
Steve Welch
727792da2b IB/mad: Enable loopback of DR SMP responses from userspace
The local loopback of an outgoing DR SMP response is limited to those
that originate at the driver specific SMA implementation during the
driver specific process_mad() function.  This patch enables a
returning DR SMP originating in userspace (or elsewhere) to be
delivered to the local managment stack.  In this specific case the
driver process_mad() function does not consume or process the MAD, so
a reponse mad has not be created and the original MAD must manually be
copied to the MAD buffer that is to be handed off to the local agent.

Signed-off-by: Steve Welch <swelch@systemfabricworks.com>
Acked-by: Hal Rosenstock <hal@xsigo.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-01-25 14:15:25 -08:00
Ralph Campbell
3828ff457a IB/mad: Remove redundant NULL pointer check in ib_mad_recv_done_handler()
In ib_mad_recv_done_handler(), the response pointer is checked for
NULL after allocating it.  It is then checked again in the local
process_mad() path but there is no possibility of it changing in
between.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Acked-by: Hal Rosenstock <hal@xsigo.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-01-25 14:15:25 -08:00
Steve Wise
8d8293cfb3 RDMA/iwcm: Set initiator depth and responder resources to device max values
Set the initiator depth and responder resources to the device max
values for new connect request events in the iWARP connection manager.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-01-25 14:15:25 -08:00
Greg Kroah-Hartman
c10997f657 Kobject: convert drivers/* from kobject_unregister() to kobject_put()
There is no need for kobject_unregister() anymore, thanks to Kay's
kobject cleanup changes, so replace all instances of it with
kobject_put().


Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-01-24 20:40:40 -08:00
Greg Kroah-Hartman
35be068198 Kobject: change drivers/infiniband to use kobject_init_and_add
Stop using kobject_register, as this way we can control the sending of
the uevent properly, after everything is properly initialized.

Cc: Roland Dreier <rolandd@cisco.com>
Cc: Sean Hefty <mshefty@ichips.intel.com>
Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-01-24 20:40:26 -08:00
Linus Torvalds
53173920da Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IB/fmr_pool: Stop ib_fmr threads from contributing to load average
  IB/ipath: Fix incorrect use of sizeof on msg buffer (function argument)
  IB/ipath: Limit length checksummed in eeprom
  IB/ipath: Fix a race where s_last is updated without lock held
  IB/mlx4: Lock SQ lock in mlx4_ib_post_send()
  IPoIB/cm: Fix receive QP cleanup
2007-10-30 15:26:56 -07:00
Anton Blanchard
3f776e8a25 IB/fmr_pool: Stop ib_fmr threads from contributing to load average
I noticed my machine was at a constant load average of 1. This was
because ib_create_fmr_pool calls kthread_create but does not
immediately wake the thread up.

Change to using kthread_run so we enter ib_fmr_cleanup_thread(), set
TASK_INTERRUPTIBLE, then go to sleep.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-30 14:57:43 -07:00
Jens Axboe
642f149031 SG: Change sg_set_page() to take length and offset argument
Most drivers need to set length and offset as well, so may as well fold
those three lines into one.

Add sg_assign_page() for those two locations that only needed to set
the page, where the offset/length is set outside of the function context.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-10-24 11:20:47 +02:00
Linus Torvalds
0b776eb542 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  mlx4_core: Increase command timeout for INIT_HCA to 10 seconds
  IPoIB/cm: Use common CQ for CM send completions
  IB/uverbs: Fix checking of userspace object ownership
  IB/mlx4: Sanity check userspace send queue sizes
  IPoIB: Rewrite "if (!likely(...))" as "if (unlikely(!(...)))"
  IB/ehca: Enable large page MRs by default
  IB/ehca: Change meaning of hca_cap_mr_pgsize
  IB/ehca: Fix ehca_encode_hwpage_size() and alloc_fmr()
  IB/ehca: Fix masking error in {,re}reg_phys_mr()
  IB/ehca: Supply QP token for SRQ base QPs
  IPoIB: Use round_jiffies() for ah_reap_task
  RDMA/cma: Fix deadlock destroying listen requests
  RDMA/cma: Add locking around QP accesses
  IB/mthca: Avoid alignment traps when writing doorbells
  mlx4_core: Kill mlx4_write64_raw()
2007-10-23 09:56:11 -07:00
Jens Axboe
45711f1af6 [SG] Update drivers to use sg helpers
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-10-22 21:19:53 +02:00
Roland Dreier
cbfb50e6e2 IB/uverbs: Fix checking of userspace object ownership
Commit 9ead190b ("IB/uverbs: Don't serialize with ib_uverbs_idr_mutex")
rewrote how userspace objects are looked up in the uverbs module's
idrs, and introduced a severe bug in the process: there is no checking
that an operation is being performed by the right process any more.
Fix this by adding the missing check of uobj->context in __idr_get_uobj().

Apparently everyone is being very careful to only touch their own
objects, because this bug was introduced in June 2006 in 2.6.18, and
has gone undetected until now.

Cc: stable <stable@kernel.org>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-19 20:01:43 -07:00
Anton Arapov
a25de534f8 [INET]: Justification for local port range robustness.
There is a justifying patch for Stephen's patches. Stephen's patches
disallows using a port range of one single port and brakes the meaning
of the 'remaining' variable, in some places it has different meaning.
My patch gives back the sense of 'remaining' variable. It should mean
how many ports are remaining and nothing else. Also my patch allows
using a single port.

  I sure we must be able to use mentioned port range, this does not
restricted by documentation and does not brake current behavior.

usefull links:
Patches posted by Stephen Hemminger
  http://marc.info/?l=linux-netdev&m=119206106218187&w=2
  http://marc.info/?l=linux-netdev&m=119206109918235&w=2

Andrew Morton's comment
  http://marc.info/?l=linux-kernel&m=119248225007737&w=2

1. Allows using a port range of one single port.
2. Gives back sense of 'remaining' variable.

Signed-off-by: Anton Arapov <aarapov@redhat.com>
Acked-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-18 22:00:17 -07:00
Sean Hefty
d02d1f5359 RDMA/cma: Fix deadlock destroying listen requests
Deadlock condition reported by Kanoj Sarcar <kanoj@netxen.com>.
The deadlock occurs when a connection request arrives at the same
time that a wildcard listen is being destroyed.

A wildcard listen maintains per device listen requests for each
RDMA device in the system.  The per device listens are automatically
added and removed when RDMA devices are inserted or removed from
the system.

When a wildcard listen is destroyed, rdma_destroy_id() acquires
the rdma_cm's device mutex ('lock') to protect against hot-plug
events adding or removing per device listens.  It then tries to
destroy the per device listens by calling ib_destroy_cm_id() or
iw_destroy_cm_id().  It does this while holding the device mutex.

However, if the underlying iw/ib CM reports a connection request
while this is occurring, the rdma_cm callback function will try
to acquire the same device mutex.  Since we're in a callback,
the ib_destroy_cm_id() or iw_destroy_cm_id() calls will block until
their callback thread returns, but the callback is blocked waiting for
the device mutex.

Fix this by re-working how per device listens are destroyed.  Use
rdma_destroy_id(), which avoids the deadlock, in place of
cma_destroy_listen().  Additional synchronization is added to handle
device hot-plug events and ensure that the id is not destroyed twice.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-16 12:25:49 -07:00
Sean Hefty
c5483388bb RDMA/cma: Add locking around QP accesses
If a user allocates a QP on an rdma_cm_id, the rdma_cm will automatically
transition the QP through its states (RTR, RTS, error, etc.)  While the
QP state transitions are occurring, the QP itself must remain valid.
Provide locking around the QP pointer to prevent its destruction while
accessing the pointer.

This fixes an issue reported by Olaf Kirch from Oracle that resulted in
a system crash:

"An incoming connection arrives and we decide to tear down the nascent
 connection.  The remote ends decides to do the same.  We start to shut
 down the connection, and call rdma_destroy_qp on our cm_id. ... Now
 apparently a 'connect reject' message comes in from the other host,
 and cma_ib_handler() is called with an event of IB_CM_REJ_RECEIVED.
 It calls cma_modify_qp_err, which for some odd reason tries to modify
 the exact same QP we just destroyed."

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-16 12:25:00 -07:00
Kay Sievers
7eff2e7a8b Driver core: change add_uevent_var to use a struct
This changes the uevent buffer functions to use a struct instead of a
long list of parameters. It does no longer require the caller to do the
proper buffer termination and size accounting, which is currently wrong
in some places. It fixes a known bug where parts of the uevent
environment are overwritten because of wrong index calculations.

Many thanks to Mathieu Desnoyers for finding bugs and improving the
error handling.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 14:51:01 -07:00
Linus Torvalds
ce9d3c9a6a Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (87 commits)
  mlx4_core: Fix section mismatches
  IPoIB: Allow setting policy to ignore multicast groups
  IB/mthca: Mark error paths as unlikely() in post_srq_recv functions
  IB/ipath: Minor fix to ordering of freeing and zeroing of tid pages.
  IB/ipath: Remove redundant link state checks
  IB/ipath: Fix IB_EVENT_PORT_ERR event
  IB/ipath: Better handling of unexpected GPIO interrupts
  IB/ipath: Maintain active time on all chips
  IB/ipath: Fix QHT7040 serial number check
  IB/ipath: Indicate a couple of chip bugs to userspace
  IB/ipath: iba6110 rev4 no longer needs recv header overrun workaround
  IB/ipath: Use counters in ipath_poll and cleanup interrupts in ipath_close
  IB/ipath: Remove duplicate copy of LMC
  IB/ipath: Add ability to set the LMC via the sysfs debugging interface
  IB/ipath: Optimize completion queue entry insertion and polling
  IB/ipath: Implement IB_EVENT_QP_LAST_WQE_REACHED
  IB/ipath: Generate flush CQE when QP is in error state
  IB/ipath: Remove redundant code
  IB/ipath: Future proof eeprom checksum code (contents reading)
  IB/ipath: UC RDMA WRITE with IMMEDIATE doesn't send the immediate
  ...
2007-10-11 19:43:13 -07:00
Stephen Hemminger
227b60f510 [INET]: local port range robustness
Expansion of original idea from Denis V. Lunev <den@openvz.org>

Add robustness and locking to the local_port_range sysctl.
1. Enforce that low < high when setting.
2. Use seqlock to ensure atomic update.

The locking might seem like overkill, but there are
cases where sysadmin might want to change value in the
middle of a DoS attack.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 17:30:46 -07:00
Sean Hefty
dcb3f974da RDMA/cma: Queue IB CM MRAs to avoid unnecessary remote retries
Automatically queue MRA message to decrease the number of retries sent
by the remote side during connection establishment.  This also has the
effect of increasing the overall connection timeout without using a
longer retry time in the case of dropped packets.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:17 -07:00
Sean Hefty
de98b693e9 IB/cm: Modify interface to send MRAs in response to duplicate messages
The IB CM provides a message received acknowledged (MRA) message that
can be sent to indicate that a REQ or REP message has been received, but
will require more time to process than the timeout specified by those
messages.  In many cases, the application may not know how long it will
take to respond to a CM message, but the majority of the time, it will
usually respond before a retry has been sent.  Rather than sending an
MRA in response to all messages just to handle the case where a longer
timeout is needed, it is more efficient to queue the MRA for sending in
case a duplicate message is received.

This avoids sending an MRA when it is not needed, but limits the number
of times that a REQ or REP will be resent.  It also provides for a
simpler implementation than generating the MRA based on a timer event.
(That is, trying to send the MRA after receiving the first REQ or REP if
a response has not been generated, so that it is received at the remote
side before a duplicate REQ or REP has been received)

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:17 -07:00
Roland Dreier
04d29b0ede IB/uverbs: Make ib_uverbs_release_event_file() static
ib_uverbs_release_event_file() is only used in uverbs_main.c, so make it
static to that file.  Also move the definition before the first use, so
a forward declaration is not needed.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:15 -07:00
Roland Dreier
a394f83bdf IB/umad: Fix bit ordering and 32-on-64 problems on big endian systems
The declaration of struct ib_user_mad_reg_req.method_mask[] exported
to userspace was an array of __u32, but the kernel internally treated
it as a bitmap made up of longs.  This makes a difference for 64-bit
big-endian kernels, where numbering the bits in an array of__u32 gives:

    |31.....0|63....31|95....64|127...96|

while numbering the bits in an array of longs gives:

    |63..............0|127............64|

64-bit userspace can handle this by just treating method_mask[] as an
array of longs, but 32-bit userspace is really stuck: the meaning of
the bits in method_mask[] depends on whether the kernel is 32-bit or
64-bit, and there's no sane way for userspace to know that.

Fix this by updating <rdma/ib_user_mad.h> to make it clear that
method_mask[] is an array of longs, and using a compat_ioctl method to
convert to an array of 64-bit longs to handle the 32-on-64 problem.
This fixes the interface description to match existing behavior (so
working binaries continue to work) in almost all situations, and gives
consistent semantics in the case of 32-bit userspace that can run on
either a 32-bit or 64-bit kernel, so that the same binary can work for
both 32-on-32 and 32-on-64 systems.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:15 -07:00
Roland Dreier
2be8e3ee8e IB/umad: Add P_Key index support
Add support for setting the P_Key index of sent MADs and getting the
P_Key index of received MADs.  This requires a change to the layout of
the ABI structure struct ib_user_mad_hdr, so to avoid breaking
compatibility, we default to the old (unchanged) ABI and add a new
ioctl IB_USER_MAD_ENABLE_PKEY that allows applications that are aware
of the new ABI to opt into using it.

We plan on switching to the new ABI by default in a year or so, and
this patch adds a warning that is printed when an application uses the
old ABI, to push people towards converting to the new ABI.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Hal Rosenstock <hal@xsigo.com>
2007-10-09 19:59:15 -07:00
Ralph Campbell
57cb61d587 IB/core: Fix handling of multicast response failures
I was looking at the code for multicast.c and noticed that
ib_sa_join_multicast() calls queue_join() which puts the
request at the front of the group->pending_list.  If this
is a second request, it seems like it would interfere with
process_join_error() since group->last_join won't point
to the member at the head of the pending_list. The sequence
would thus be:

1. ib_sa_join_multicast()
   puts member1 on head of pending_list and starts work thread
2. mcast_work_handler()
   calls send_join() which sets group->last_join to member1
3. ib_sa_join_multicast()
   puts member2 on head of pending_list
4. join operation for member1 receives failures response from SA.
5. join_handler() is called with error status
6. process_join_error() fails to process member1 since
   it doesn't match the first entry in the group->pending_list.

The impact is that the failed join request is tossed.  The second
request is processed, and after it completes, the original request ends
up being retried.

This change also results in join requests being processed in FIFO
order.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:14 -07:00
Steve Wise
935ef2d7a2 RDMA/cma: Use neigh_event_send() to start neighbour discovery
Calling arp_send() to initiate neighbour discovery (ND) doesn't do the
full ND protocol.  Namely, it doesn't handle retransmitting the arp
request if it is dropped. The function neigh_event_send() does all
this.  Without doing full ND, RDMA address resolution fails in the
presence of dropped ARP broadcast packets.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:13 -07:00
Joachim Fenkes
c8d8beea03 IB/umem: Add hugetlb flag to struct ib_umem
During ib_umem_get(), determine whether all pages from the memory
region are hugetlb pages and report this in the "hugetlb" member.
Low-level drivers can use this information if they need it.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:13 -07:00
Sean Hefty
7ce86409ad RDMA/ucma: Allow user space to set service type
Export the ability to set the type of service to user space.  Model
the interface after setsockopt.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:12 -07:00
Sean Hefty
a81c994d5e RDMA/cma: Add ability to specify type of service
Provide support to specify a type of service for a communication
identifier.  A new function call is used when dealing with IPv4
addresses.  For IPv6 addresses, the ToS is specified through the
traffic class field in the sockaddr_in6 structure.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>

[ The comments Eitan Zahavi and myself have made over the v1 post at 
  <http://lists.openfabrics.org/pipermail/general/2007-August/039247.html>
  were fully addressed. ]
 
Reviewed-by: Or Gerlitz <ogerlitz@voltaire.com> 
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:12 -07:00
Sean Hefty
733d65fe33 IB/sa: Add new QoS fields to path record
The QoS annex defines new fields for path records.  Add them to the
ib_sa for consumers that want to use them.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Or Gerlitz <ogerlitz@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:12 -07:00
Ali Ayoub
3c10c7c929 IB/sa: Error handling thinko fix
ib_create_send_mad() returns an error code pointer on error, not NULL.

Signed-off-by: Michael S. Tsirkin <mst@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:07 -07:00
Anton Blanchard
8a68bbe31d IB/fmr_pool: Clean up some error messages in fmr_pool.c
A number of printks in fmr_pool.c dont have newlines, eg:

    fmr_create failed for FMR 0<5>FS-Cache: Loaded

Fix them up.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:05 -07:00