Commit Graph

571 Commits

Author SHA1 Message Date
Michael Heinz 1eba843dd7 IB/mad: Improve an error message so error code is included
Signed-off-by: Michael Heinz <michael.heinz@qlogic.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-03-18 09:42:20 -07:00
Sean Hefty 1bdd6384c2 RDMA/addr: Fix return of uninitialized ret value
Commit b23dd4fe42 ("ipv4: Make output route lookup return rtable
directly") resulted in leaving ret uninitialized, where it may later
be returned.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-03-17 17:00:19 -07:00
Linus Torvalds 7a6362800c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1480 commits)
  bonding: enable netpoll without checking link status
  xfrm: Refcount destination entry on xfrm_lookup
  net: introduce rx_handler results and logic around that
  bonding: get rid of IFF_SLAVE_INACTIVE netdev->priv_flag
  bonding: wrap slave state work
  net: get rid of multiple bond-related netdevice->priv_flags
  bonding: register slave pointer for rx_handler
  be2net: Bump up the version number
  be2net: Copyright notice change. Update to Emulex instead of ServerEngines
  e1000e: fix kconfig for crc32 dependency
  netfilter ebtables: fix xt_AUDIT to work with ebtables
  xen network backend driver
  bonding: Improve syslog message at device creation time
  bonding: Call netif_carrier_off after register_netdevice
  bonding: Incorrect TX queue offset
  net_sched: fix ip_tos2prio
  xfrm: fix __xfrm_route_forward()
  be2net: Fix UDP packet detected status in RX compl
  Phonet: fix aligned-mode pipe socket buffer header reserve
  netxen: support for GbE port settings
  ...

Fix up conflicts in drivers/staging/brcm80211/brcmsmac/wl_mac80211.c
with the staging updates.
2011-03-16 16:29:25 -07:00
Sean Hefty a396d43a35 RDMA/cma: Replace global lock in rdma_destroy_id() with id-specific one
rdma_destroy_id currently uses the global rdma cm 'lock' to test if an
rdma_cm_id has been bound to a device.  This prevents an active
address resolution callback handler from assigning a device to the
rdma_cm_id after rdma_destroy_id checks for one.

Instead, we can replace the use of the global lock around the check to
the rdma_cm_id device pointer by setting the id state to destroying,
then flushing all active callbacks.  The latter is accomplished by
acquiring and releasing the handler_mutex.  Any active handler will
complete first, and any newly scheduled handlers will find the
rdma_cm_id in an invalid state.

In addition to optimizing the current locking scheme, the use of the
rdma_cm_id mutex is a more intuitive synchronization mechanism than
that of the global lock.  These changes are based on feedback from
Doug Ledford <dledford@redhat.com> while he was trying to debug a
crash in the rdma cm destroy path.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-03-15 10:57:34 -07:00
Sean Hefty 8d8ac86564 IB/cm: Cancel pending LAP message when exiting IB_CM_ESTABLISH state
This problem was reported by Moni Shoua <monis@mellanox.com> and Amir
Vadai <amirv@mellanox.com>:

	When destroying a cm_id from a context of a work queue and if
	the lap_state of this cm_id is IB_CM_LAP_SENT, we need to
	release the reference of this id that was taken upon the send
	of the LAP message.  Otherwise, if the expected APR message
	gets lost, it is only after a long time that the reference
	will be released, while during that the work handler thread is
	not available to process other things.

It turns out that we need to cancel any pending LAP messages whenever
we transition out of the IB_CM_ESTABLISH state.  This occurs when
disconnecting - either sending or receiving a DREQ.  It can also
happen in a corner case where we receive a REJ message after sending
an RTU, followed by a LAP.  Add checks and cancel any outstanding LAP
messages in these three cases.

Canceling the LAP when sending a DREQ fixes the destroy problem
reported by Moni.  When a cm_id is destroyed in the IB_CM_ESTABLISHED
state, it sends a DREQ to the remote side to notify the peer that the
connection is going away.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-03-15 10:56:12 -07:00
Sean Hefty 29963437a4 IB/cm: Bump reference count on cm_id before invoking callback
When processing a SIDR REQ, the ib_cm allocates a new cm_id.  The
refcount of the cm_id is initialized to 1.  However, cm_process_work
will decrement the refcount after invoking all callbacks.  The result
is that the cm_id will end up with refcount set to 0 by the end of the
sidr req handler.

If a user tries to destroy the cm_id, the destruction will proceed,
under the incorrect assumption that no other threads are referencing
the cm_id.  This can lead to a crash when the cm callback thread tries
to access the cm_id.

This problem was noticed as part of a larger investigation with kernel
crashes in the rdma_cm when running on a real time OS.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Acked-by: Doug Ledford <dledford@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-03-15 10:56:12 -07:00
Sean Hefty 25ae21a101 RDMA/cma: Fix crash in request handlers
Doug Ledford and Red Hat reported a crash when running the rdma_cm on
a real-time OS.  The crash has the following call trace:

    cm_process_work
       cma_req_handler
          cma_disable_callback
          rdma_create_id
             kzalloc
             init_completion
          cma_get_net_info
          cma_save_net_info
          cma_any_addr
             cma_zero_addr
          rdma_translate_ip
             rdma_copy_addr
          cma_acquire_dev
             rdma_addr_get_sgid
             ib_find_cached_gid
             cma_attach_to_dev
          ucma_event_handler
             kzalloc
             ib_copy_ah_attr_to_user
          cma_comp

[ preempted ]

    cma_write
        copy_from_user
        ucma_destroy_id
           copy_from_user
           _ucma_find_context
           ucma_put_ctx
           ucma_free_ctx
              rdma_destroy_id
                 cma_exch
                 cma_cancel_operation
                 rdma_node_get_transport

        rt_mutex_slowunlock
        bad_area_nosemaphore
        oops_enter

They were able to reproduce the crash multiple times with the
following details:

    Crash seems to always happen on the:
            mutex_unlock(&conn_id->handler_mutex);
    as conn_id looks to have been freed during this code path.

An examination of the code shows that a race exists in the request
handlers.  When a new connection request is received, the rdma_cm
allocates a new connection identifier.  This identifier has a single
reference count on it.  If a user calls rdma_destroy_id() from another
thread after receiving a callback, rdma_destroy_id will proceed to
destroy the id and free the associated memory.  However, the request
handlers may still be in the process of running.  When control returns
to the request handlers, they can attempt to access the newly created
identifiers.

Fix this by holding a reference on the newly created rdma_cm_id until
the request handler is through accessing it.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Acked-by: Doug Ledford <dledford@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-03-15 10:00:28 -07:00
David S. Miller 4c9483b2fb ipv6: Convert to use flowi6 where applicable.
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-12 15:08:54 -08:00
David S. Miller 1d28f42c1b net: Put flowi_* prefix on AF independent members of struct flowi
I intend to turn struct flowi into a union of AF specific flowi
structs.  There will be a common structure that each variant includes
first, much like struct sock_common.

This is the first step to move in that direction.

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-12 15:08:44 -08:00
David S. Miller 78fbfd8a65 ipv4: Create and use route lookup helpers.
The idea here is this minimizes the number of places one has to edit
in order to make changes to how flows are defined and used.

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-12 15:08:42 -08:00
David S. Miller b23dd4fe42 ipv4: Make output route lookup return rtable directly.
Instead of on the stack.

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-02 14:31:35 -08:00
Roland Dreier e51c7b1ab0 Merge branches 'amso1100', 'cma', 'cxgb4', 'misc', 'mlx4' and 'qib' into for-next 2011-01-29 20:45:04 -08:00
Tejun Heo 96e61fa55e RDMA: Update missed conversion of flush_scheduled_work()
Commit f06267104d ("RDMA: Update workqueue usage") introduced ib_wq
and removed the use of flush_scheduled_work(); however, during the merge
process one chunk was lost in ib_sa_remove_one().  Fix it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-01-28 16:39:08 -08:00
Steve Wise e86f8b06f5 RDMA/ucma: Copy iWARP route information on queries
For iWARP rdma_cm ids, the "route" information is the L2 src and
next hop addresses.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-01-28 16:34:05 -08:00
Tejun Heo f06267104d RDMA: Update workqueue usage
* ib_wq is added, which is used as the common workqueue for infiniband
  instead of the system workqueue.  All system workqueue usages
  including flush_scheduled_work() callers are converted to use and
  flush ib_wq.

* cancel_delayed_work() + flush_scheduled_work() converted to
  cancel_delayed_work_sync().

* qib_wq is removed and ib_wq is used instead.

This is to prepare for deprecation of flush_scheduled_work().

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2011-01-16 21:16:31 -08:00
David S. Miller 17f7f4d9fc Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:
	net/ipv4/fib_frontend.c
2010-12-26 22:37:05 -08:00
Dan Carpenter 7182afea8d IB/uverbs: Handle large number of entries in poll CQ
In ib_uverbs_poll_cq() code there is a potential integer overflow if
userspace passes in a large cmd.ne.  The calls to kmalloc() would
allocate smaller buffers than intended, leading to memory corruption.
There iss also an information leak if resp wasn't all used.
Unprivileged userspace may call this function, although only if an
RDMA device that uses this function is present.

Fix this by copying CQ entries one at a time, which avoids the
allocation entirely, and also by moving this copying into a function
that makes sure to initialize all memory copied to userspace.

Special thanks to Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
for his help and advice.

Cc: <stable@kernel.org>
Signed-off-by: Dan Carpenter <error27@gmail.com>

[ Monkey around with things a bit to avoid bad code generation by gcc
  when designated initializers are used.  - Roland ]

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-12-08 15:23:49 -08:00
Vasiliy Kulikov 91a4d157d0 IB: Fix information leak in marshalling code
ib_ucm_init_qp_attr() and ucma_init_qp_attr() pass struct ib_uverbs_qp_attr
with reserved, qp_state, {ah_attr,alt_ah_attr}{reserved,->grh.reserved}
fields uninitialized to copy_to_user().  This leads to leaking of
contents of kernel stack memory to userspace.

Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-12-01 16:33:18 -08:00
Or Gerlitz f55864a4f4 IB/pack: Remove some unused code added by the IBoE patches
Remove unused functions added by commit ff7f5aab35 ("IB/pack: IBoE UD
packet packing support").

Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com>
2010-12-01 16:30:18 -08:00
Eric Dumazet 22f4fbd9bd infiniband: remove dev_base_lock use
dev_base_lock is the legacy way to lock the device list, and is planned
to disappear. (writers hold RTNL, readers hold RCU lock)

Convert rdma_translate_ip() and update_ipv6_gids() to RCU locking.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-24 11:41:56 -08:00
Eric Dumazet 72cdd1d971 net: get rid of rtable->idev
It seems idev field in struct rtable has no special purpose, but adding
extra atomic ops.

We hold refcounts on the device itself (using percpu data, so pretty
cheap in current kernel).

infiniband case is solved using dst.dev instead of idev->dev

Removal of this field means routing without route cache is now using
shared data, percpu data, and only potential contention is a pair of
atomic ops on struct neighbour per forwarded packet.

About 5% speedup on routing test.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Roland Dreier <rolandd@cisco.com>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-11 10:29:40 -08:00
Roland Dreier 116e9535fe Merge branches 'amso1100', 'cma', 'cxgb3', 'cxgb4', 'ehca', 'iboe', 'ipoib', 'misc', 'mlx4', 'nes', 'qib' and 'srp' into for-next 2010-10-26 16:09:11 -07:00
Eli Cohen 8ad330a002 IB/core: Add link layer type information to sysfs
Since an IB transport port may use either IB or Ethernet as its link layer,
add the file /sys/class/infiniband/<device>/ports/<port_num>/link_layer to
show the link layer for the port.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-10-25 10:20:39 -07:00
Eli Cohen af7bd46376 IB/core: Add VLAN support for IBoE
Add 802.1q VLAN support to IBoE. The VLAN tag is encoded within the
GID derived from a link local address in the following way:

    GID[11] GID[12] contain the VLAN ID when the GID contains a VLAN.

The 3 bits user priority field of the packets are identical to the 3
bits of the SL.

In case of rdma_cm apps, the TOS field is used to generate the SL
field by doing a shift right of 5 bits effectively taking to 3 MS bits
of the TOS field.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-10-25 10:20:39 -07:00
Eli Cohen 2420b60b1d IB/uverbs: Return link layer type to userspace for query port operation
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-10-25 10:20:39 -07:00
Steve Wise 97cb7e40c6 RDMA/ucma: Allow tuning the max listen backlog
For iWARP connections, the connect request is carried in a TCP payload
on an already established TCP connection.  So if the ucma's backlog is
full, the connection request is transmitted and acked at the TCP level
by the time the connect request gets dropped in the ucma.  The end
result is the connection gets rejected by the iWARP provider.
Further, a 32 node 256NP OpenMPI job will generate > 128 connect
requests on some ranks.

This patch increases the default max backlog to 1024, and adds a
sysctl variable so the backlog can be adjusted at run time.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-10-23 13:41:40 -07:00
Eli Cohen ff7f5aab35 IB/pack: IBoE UD packet packing support
Add support for packing IBoE packet headers.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>

[ Clean up and fix ib_ud_header_init() a bit.  - Roland ]

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-10-14 12:41:29 -07:00
Eli Cohen 3c86aa70bf RDMA/cm: Add RDMA CM support for IBoE devices
Add support for IBoE device binding and IP --> GID resolution.  Path
resolving and multicast joining are implemented within cma.c by
filling in the responses and running callbacks in the CMA work queue.

IP --> GID resolution always yields IPv6 link local addresses; remote
GIDs are derived from the destination MAC address of the remote port.
Multicast GIDs are always mapped to multicast MACs as is done in IPv6.
(IPv4 multicast is enabled by translating IPv4 multicast addresses to
IPv6 multicast as described in
<http://www.mail-archive.com/ipng@sunroof.eng.sun.com/msg02134.html>.)

Some helper functions are added to ib_addr.h.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-10-13 15:46:43 -07:00
Eli Cohen fac70d5191 IB/mad: IBoE supports only QP1 (no QP0)
Since IBoE is using Ethernet as its link layer, there is no central
management entity so there is need for QP0.  QP1 is still needed since
it handles communications between CM agents.  This patch will skip QP0
and create only QP1 for IBoE ports.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-10-13 09:38:11 -07:00
Animesh K Trivedi 26012f0750 RDMA/iwcm: Fix hang in uninterruptible wait on cm_id destroy
A process can get stuck in an uninterruptible wait in the
kernel while destroying a cm_id when iw_cm_connect() fails:

For example, When creation of a PD fails but the user continues with
an attempt to connect to the server without checking the return value,
in iw_cm_connect() a NULL qp is found so the call fails.  However the
IWCM_F_CONNECT_WAIT bit is not cleared.  destroy_cm_id() then waits
forever for IWCM_F_CONNECT_WAIT to be cleared.

The same problem exists on the passive side with the accept call.

Fix this by clearing the bit and waking up any waiters in the
appropriate spots.

Signed-off-by: Animesh Trivedi <atr@zurich.ibm.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-10-11 20:24:04 -07:00
Thomas Gleixner 557d0540b9 IB/umad: Make user_mad semaphore a real one
Get rid of init_MUTEX[_LOCKED]() and use sema_init() instead.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-09-28 20:52:21 -07:00
Eli Cohen a3f5adaf49 IB/core: Add link layer property to ports
This patch allows ports to have different link layers:
IB_LINK_LAYER_INFINIBAND or IB_LINK_LAYER_ETHERNET.  This is required
for adding IBoE (InfiniBand-over-Ethernet, aka RoCE) support.  For
devices that do not provide an implementation for querying the link
layer property of a port, we return a default value based on the
transport: RMA_TRANSPORT_IB nodes will return IB_LINK_LAYER_INFINIBAND
and RDMA_TRANSPORT_IWARP nodes will return IB_LINK_LAYER_ETHERNET.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-09-27 17:51:10 -07:00
Linus Torvalds 3cc08fc35d 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: (42 commits)
  IB/qib: Add missing <linux/slab.h> include
  IB/ehca: Drop unnecessary NULL test
  RDMA/nes: Fix confusing if statement indentation
  IB/ehca: Init irq tasklet before irq can happen
  RDMA/nes: Fix misindented code
  RDMA/nes: Fix showing wqm_quanta
  RDMA/nes: Get rid of "set but not used" variables
  RDMA/nes: Read firmware version from correct place
  IB/srp: Export req_lim via sysfs
  IB/srp: Make receive buffer handling more robust
  IB/srp: Use print_hex_dump()
  IB: Rename RAW_ETY to RAW_ETHERTYPE
  RDMA/nes: Fix two sparse warnings
  RDMA/cxgb3: Make needlessly global iwch_l2t_send() static
  IB/iser: Make needlessly global iser_alloc_rx_descriptors() static
  RDMA/cxgb4: Add timeouts when waiting for FW responses
  IB/qib: Fix race between qib_error_qp() and receive packet processing
  IB/qib: Limit the number of packets processed per interrupt
  IB/qib: Allow writes to the diag_counters to be able to clear them
  IB/qib: Set cfgctxts to number of CPUs by default
  ...
2010-08-07 17:08:02 -07:00
Aleksey Senin a2ebf07ae5 IB: Rename RAW_ETY to RAW_ETHERTYPE
Change abbreviated IB_QPT_RAW_ETY to IB_QPT_RAW_ETHERTYPE to make
the special QP type easier to understand.

cf http://www.mail-archive.com/linux-rdma@vger.kernel.org/msg04530.html

Signed-off-by: Aleksey Senin <alekseys@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-08-04 10:44:19 -07:00
Sean Hefty 50a025c69e IB/cm: Check LAP state before sending an MRA
NULL pointer dereferences in ib_cm_init_qp_attr() were seen by some
users.  From a crash dump, I determined that we died in
cm_init_qp_rts_attr() (it's inlined, so it doesn't show up in the
traceback) on the line labeled below:

static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
                               struct ib_qp_attr *qp_attr,
                               int *qp_attr_mask)
{
        ........
        if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) {
                .....
        } else {
               *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE;
               qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; <-die


The problem is that the rdma_cm can call ib_send_cm_mra() after a
connection has been established.  The ib_cm incorrectly assumes that
the MRA is in response to a LAP (load alternate path) message, even
though no LAP message has been received.  The ib_cm needs to check the
lap_state before sending an MRA if the cm_id state is established.

Reported-by: Arthur Kepner <akepner@sgi.com>
Reported-by: Josh England <jjengla@gmail.com>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-07-28 15:18:24 -07:00
Roland Dreier f400e5b38a IB/umad: Remove unused-but-set variable 'already_dead'
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-07-14 13:25:04 -07:00
Changli Gao d8d1f30b95 net-next: remove useless union keyword
remove useless union keyword in rtable, rt6_info and dn_route.

Since there is only one member in a union, the union keyword isn't useful.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-10 23:31:35 -07:00
Julia Lawall e642df6a0b IB/ucm: Use memdup_user()
Use memdup_user when user data is immediately copied into the
allocated region.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression from,to,size,flag;
position p;
identifier l1,l2;
@@

-  to = \(kmalloc@p\|kzalloc@p\)(size,flag);
+  to = memdup_user(from,size);
   if (
-      to==NULL
+      IS_ERR(to)
                 || ...) {
   <+... when != goto l1;
-  -ENOMEM
+  PTR_ERR(to)
   ...+>
   }
-  if (copy_from_user(to, from, size) != 0) {
-    <+... when != goto l2;
-    -EFAULT
-    ...+>
-  }
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
2010-05-25 21:10:57 -07:00
Roland Dreier acdc30b56a Merge branches 'cxgb4', 'misc', 'mlx4', 'nes' and 'qib' into for-next 2010-05-25 09:54:03 -07:00
Roland Dreier 1693395511 IB/mad: Make needlessly global mad_sendq_size/mad_recvq_size static
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-05-23 21:39:31 -07:00
Ralph Campbell 9a6edb60ec IB/core: Allow device-specific per-port sysfs files
Add a new parameter to ib_register_device() so that low-level device
drivers can pass in a pointer to a callback function that will be
called for each port that is registered in sysfs.  This allows
low-level device drivers to create files in

    /sys/class/infiniband/<hca>/ports/<N>/

without having to poke through the internals of the RDMA sysfs handling.

There is no need for an unregister function since the kobject
reference will go to zero when ib_unregister_device() is called.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-05-21 10:34:44 -07:00
Roland Dreier ffebedb7ab Merge branches 'amso1100', 'bkl', 'cma', 'cxgb3', 'cxgb4', 'ipoib', 'iser', 'masked-atomics', 'misc', 'mthca' and 'nes' into for-next 2010-05-15 20:06:01 -07:00
Julia Lawall 9893e742a0 IB/core: Use kmemdup() instead of kmalloc()+memcpy()
Use kmemdup when some other buffer is immediately copied into the
allocated region.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression from,to,size,flag;
statement S;
@@

-  to = \(kmalloc\|kzalloc\)(size,flag);
+  to = kmemdup(from,size,flag);
   if (to==NULL || ...) S
-  memcpy(to, from, size);
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-05-15 20:05:07 -07:00
Tetsuo Handa 5d7220e8dc RDMA/cma: Randomize local port allocation
Randomize local port allocation in the way sctp_get_port_local() does.
Update rover at the end of loop since we're likely to pick a valid port
on the first try.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-04-21 16:18:40 -07:00
Roland Dreier bc1db9af73 IB: Explicitly rule out llseek to avoid BKL in default_llseek()
Several RDMA user-access drivers have file_operations structures with
no .llseek method set.  None of the drivers actually do anything with
f_pos, so this means llseek is essentially a NOP, instead of returning
an error as leaving other file_operations methods unimplemented would
do.  This is mostly harmless, except that a NULL .llseek means that
default_llseek() is used, and this function grabs the BKL, which we
would like to avoid.

Since llseek does nothing useful on these files, we would like it to
return an error to userspace instead of silently grabbing the BKL and
succeeding.  For nearly all of the file types, we take the
belt-and-suspenders approach of setting the .llseek method to
no_llseek and also calling nonseekable_open(); the exception is the
uverbs_event files, which are created with anon_inode_getfile(), which
already sets f_mode the same way as nonseekable_open() would.

This work is motivated by Arnd Bergmann's bkl-removal tree.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-04-21 12:17:38 -07:00
Linus Torvalds 0eddb519b9 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/mlx4: Check correct variable for allocation failure
  RDMA/nes: Correct cap.max_inline_data assignment in nes_query_qp()
  RDMA/cm: Set num_paths when manually assigning path records
  IB/cm: Fix device_create() return value check
2010-04-09 11:53:06 -07:00
Roland Dreier 5091b35388 Merge branches 'cma', 'misc', 'mlx4' and 'nes' into for-linus 2010-04-09 09:14:21 -07:00
Sean Hefty ae2d9293d7 RDMA/cm: Set num_paths when manually assigning path records
When manually assigning the path records to use for a connection, save
the number of paths that were set.  Otherwise, checks against num_path
will show 0, even though path record data is available.

This was discovered by manually setting the path records from user
space, then querying the kernel to see if the correct path records
were assigned, only to discover that the kernel returned 0 path
records to the query.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-04-07 14:13:22 -07:00
Jani Nikula 3e340c05c0 IB/cm: Fix device_create() return value check
Use IS_ERR() instead of comparing to NULL.

Signed-off-by: Jani Nikula <ext-jani.1.nikula@nokia.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-03-31 14:26:52 -07:00
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00