Commit Graph

92 Commits

Author SHA1 Message Date
Doug Ledford
f8457d5832 Merge branch 'bart-srpt-for-next' into k.o/wip/dl-for-next
Merging in 12 patch series from Bart that required changes in the
current for-rc branch in order to apply cleanly.

Signed-off-by: Doug Ledford <dledford@redhat.com>
2018-01-08 16:06:20 -05:00
Bart Van Assche
02ee9da347 IB/core: Fix two kernel warnings triggered by rxe registration
Eliminate the WARN_ONs that create following two warnings when
registering an rxe device:

WARNING: CPU: 2 PID: 1005 at drivers/infiniband/core/device.c:449 ib_register_device+0x591/0x640 [ib_core]
CPU: 2 PID: 1005 Comm: run_tests Not tainted 4.15.0-rc4-dbg+ #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.0.0-prebuilt.qemu-project.org 04/01/2014
RIP: 0010:ib_register_device+0x591/0x640 [ib_core]
Call Trace:
 rxe_register_device+0x3c6/0x470 [rdma_rxe]
 rxe_add+0x543/0x5e0 [rdma_rxe]
 rxe_net_add+0x37/0xb0 [rdma_rxe]
 rxe_param_set_add+0x5a/0x120 [rdma_rxe]
 param_attr_store+0x5e/0xc0
 module_attr_store+0x19/0x30
 sysfs_kf_write+0x3d/0x50
 kernfs_fop_write+0x116/0x1a0
 __vfs_write+0x23/0x120
 vfs_write+0xbe/0x1b0
 SyS_write+0x44/0xa0
 entry_SYSCALL_64_fastpath+0x23/0x9a

WARNING: CPU: 2 PID: 1005 at drivers/infiniband/core/sysfs.c:1279 ib_device_register_sysfs+0x11d/0x160 [ib_core]
CPU: 2 PID: 1005 Comm: run_tests Tainted: G        W        4.15.0-rc4-dbg+ #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.0.0-prebuilt.qemu-project.org 04/01/2014
RIP: 0010:ib_device_register_sysfs+0x11d/0x160 [ib_core]
Call Trace:
 ib_register_device+0x3f7/0x640 [ib_core]
 rxe_register_device+0x3c6/0x470 [rdma_rxe]
 rxe_add+0x543/0x5e0 [rdma_rxe]
 rxe_net_add+0x37/0xb0 [rdma_rxe]
 rxe_param_set_add+0x5a/0x120 [rdma_rxe]
 param_attr_store+0x5e/0xc0
 module_attr_store+0x19/0x30
 sysfs_kf_write+0x3d/0x50
 kernfs_fop_write+0x116/0x1a0
 __vfs_write+0x23/0x120
 vfs_write+0xbe/0x1b0
 SyS_write+0x44/0xa0
 entry_SYSCALL_64_fastpath+0x23/0x9a

The code should accept either a parent pointer or a fully specified DMA
specification without producing warnings.

Fixes: 99db949403 ("IB/core: Remove ib_device.dma_device")
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: stable@vger.kernel.org # v4.11
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-01-03 17:26:59 -07:00
Leon Romanovsky
f8978bd95c RDMA/netlink: Fix locking around __ib_get_device_by_index
Holding locks is mandatory when calling __ib_device_get_by_index,
otherwise there are races during the list iteration with device removal.

Since the locks are static to device.c, __ib_device_get_by_index can
never be called correctly by any user out side the file.

Make the function static and provide a safe function that gets the
correct locks and returns a kref'd pointer. Fix all callers.

Fixes: e5c9469efc ("RDMA/netlink: Add nldev device doit implementation")
Fixes: c3f66f7b00 ("RDMA/netlink: Implement nldev port doit callback")
Fixes: 7d02f605f0 ("RDMA/netlink: Add nldev port dumpit implementation")
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-01-02 14:11:40 -07:00
Leon Romanovsky
924b8900a4 RDMA/core: Replace open-coded variant of put_device
There is an existing function to decrease reference counter
of the device, let's use it.

Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-01-02 13:36:57 -07:00
Jason Gunthorpe
76a895d9e1 Merge branch 'from-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git
Patches for 4.16 that are dependent on patches sent to 4.15-rc.

These are small clean ups for the vmw_pvrdma and i40iw drivers.

* 'from-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git:
  RDMA/vmw_pvrdma: Remove usage of BIT() from UAPI header
  RDMA/vmw_pvrdma: Use refcount_t instead of atomic_t
  RDMA/vmw_pvrdma: Use more specific sizeof in kcalloc
  RDMA/vmw_pvrdma: Clarify QP and CQ is_kernel logic
  RDMA/vmw_pvrdma: Add UAR SRQ macros in ABI header file
  i40iw: Change accelerated flag to bool
2017-12-27 21:50:46 -07:00
Parav Pandit
dbb12562f7 IB/{core, ipoib}: Simplify ib_find_gid to search only for IB link layer
Currently there are no users of ib_find_gid for RoCE transport. It is
only used by IPoIB.
Therefore its simplified to ignore RoCE ports and GID type check which
was previously done for every port.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2017-12-18 15:37:10 -07:00
Leon Romanovsky
d0e312fe3d RDMA/netlink: Fix general protection fault
The RDMA netlink core code checks validity of messages by ensuring
that type and operand are in range. It works well for almost all
clients except NLDEV, which has cb_table less than number of operands.

Request to access such operand will trigger the following kernel panic.

This patch updates all places where cb_table is declared for the
consistency, but only NLDEV is actually need it.

general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN
Modules linked in:
CPU: 0 PID: 522 Comm: syz-executor6 Not tainted 4.13.0+ #4
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014
task: ffff8800657799c0 task.stack: ffff8800695d000
RIP: 0010:rdma_nl_rcv_msg+0x13a/0x4c0
RSP: 0018:ffff8800695d7838 EFLAGS: 00010207
RAX: dffffc0000000000 RBX: 1ffff1000d2baf0b RCX: 00000000704ff4d7
RDX: 0000000000000000 RSI: ffffffff81ddb03c RDI: 00000003827fa6bc
RBP: ffff8800695d7900 R08: ffffffff82ec0578 R09: 0000000000000000
R10: ffff8800695d7900 R11: 0000000000000001 R12: 000000000000001c
R13: ffff880069d31e00 R14: 00000000ffffffff R15: ffff880069d357c0
FS:  00007fee6acb8700(0000) GS:ffff88006ca00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000201a9000 CR3: 0000000059766000 CR4: 00000000000006b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ? rdma_nl_multicast+0x80/0x80
 rdma_nl_rcv+0x36b/0x4d0
 ? ibnl_put_attr+0xc0/0xc0
 netlink_unicast+0x4bd/0x6d0
 ? netlink_sendskb+0x50/0x50
 ? drop_futex_key_refs.isra.4+0x68/0xb0
 netlink_sendmsg+0x9ab/0xbd0
 ? nlmsg_notify+0x140/0x140
 ? wake_up_q+0xa1/0xf0
 ? drop_futex_key_refs.isra.4+0x68/0xb0
 sock_sendmsg+0x88/0xd0
 sock_write_iter+0x228/0x3c0
 ? sock_sendmsg+0xd0/0xd0
 ? do_futex+0x3e5/0xb20
 ? iov_iter_init+0xaf/0x1d0
 __vfs_write+0x46e/0x640
 ? sched_clock_cpu+0x1b/0x190
 ? __vfs_read+0x620/0x620
 ? __fget+0x23a/0x390
 ? rw_verify_area+0xca/0x290
 vfs_write+0x192/0x490
 SyS_write+0xde/0x1c0
 ? SyS_read+0x1c0/0x1c0
 ? trace_hardirqs_on_thunk+0x1a/0x1c
 entry_SYSCALL_64_fastpath+0x18/0xad
RIP: 0033:0x7fee6a74a219
RSP: 002b:00007fee6acb7d58 EFLAGS: 00000212 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000638000 RCX: 00007fee6a74a219
RDX: 0000000000000078 RSI: 0000000020141000 RDI: 0000000000000006
RBP: 0000000000000046 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: ffff8800695d7f98
R13: 0000000020141000 R14: 0000000000000006 R15: 00000000ffffffff
Code: d6 48 b8 00 00 00 00 00 fc ff df 66 41 81 e4 ff 03 44 8d 72 ff 4a 8d 3c b5 c0 a6 7f 82 44 89 b5 4c ff ff ff 48 89 f9 48 c1 e9 03 <0f> b6 0c 01 48 89 f8 83 e0 07 83 c0 03 38 c8 7c 08 84 c9 0f 85
RIP: rdma_nl_rcv_msg+0x13a/0x4c0 RSP: ffff8800695d7838
---[ end trace ba085d123959c8ec ]---
Kernel panic - not syncing: Fatal exception

Cc: syzkaller <syzkaller@googlegroups.com>
Fixes: b4c598a67e ("RDMA/netlink: Implement nldev device dumpit calback")
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>

Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-12-07 15:28:07 -05:00
Dmitry Monakhov
a9cd1a6737 IB/core: Init subsys if compiled to vmlinuz-core
Once infiniband is compiled as a core component its subsystem must be
enabled before device initialization. Otherwise there is a NULL pointer
dereference during mlx4_core init, calltrace:
->device_add
  if (dev->class) {
     deref  dev->class->p =>NULLPTR

#Config
CONFIG_NET_DEVLINK=y
CONFIG_MAY_USE_DEVLINK=y
CONFIG_MLX4_EN=y

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2017-12-01 12:21:26 -07:00
Doug Ledford
a1139697ad Merge branch 'mellanox' into k.o/for-next
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-24 20:25:15 -04:00
Selvin Xavier
61e0962d52 IB: Avoid ib_modify_port() failure for RoCE devices
IB CM calls ib_modify_port() irrespective of link layer. If the
failure is returned, the mad agent gets unregistered for those
devices. Recently, modify_port() hook was removed from some of the
low level drivers as it was always returning success. This breaks
rdma connection establishment over those devices.
For ethernet devices, Qkey violation and port capabilities are not
applicable. So returning success for RoCE when modify_port hook is
is not implemented.

Cc: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-24 17:34:57 -04:00
Leon Romanovsky
dcc9881e67 RDMA/(core, ulp): Convert register/unregister event handler to be void
The functions ib_register_event_handler() and
ib_unregister_event_handler() always returned success and they can't fail.

Let's convert those functions to be void, remove redundant checks and
cleanup tons of goto statements.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-24 16:27:10 -04:00
Jason Gunthorpe
e3bf14bdc1 rdma: Autoload netlink client modules
If a message comes in and we do not have the client in the table, then
try to load the module supplying that client using MODULE_ALIAS to find
it.

This duplicates the scheme seen in other netlink muxes (eg nfnetlink).

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22 17:04:22 -04:00
Doug Ledford
b0e32e20e3 Merge branch 'k.o/for-4.13-rc' into k.o/for-next
Merging our (hopefully) final -rc pull branch into our for-next branch
because some of our pending patches won't apply cleanly without having
the -rc patches in our tree.

Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-18 14:12:04 -04:00
Doug Ledford
d3cf4d9915 Merge branch 'misc' into k.o/for-next
Conflicts:
	drivers/infiniband/core/iwcm.c - The rdma_netlink patches in
	HEAD and the iwarp cm workqueue fix (don't use WQ_MEM_RECLAIM,
	we aren't safe for that context) touched the same code.

Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-18 14:10:23 -04:00
Sagi Grimberg
b059e2108d RDMA/core: make ib_device.add method optional
ib_clients can indeed fill .add to NULL, but then they will not see
any device removal notifications. The reason is that that
ib_register_client and ib_register_device checked existence of .add
before adding the creating a corresponding client_data and adding
it to the list. Simple condition reverse fixes the issue.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-18 10:46:20 -04:00
Shiraz Saleem
06f8174a97 IB/core: Protect sysfs entry on ib_unregister_device
ib_unregister_device is not protecting removal of sysfs entries.
A call to ib_register_device in that window can result in
duplicate sysfs entry warning. Move mutex_unlock to after
ib_device_unregister_sysfs to protect against sysfs entry creation.

This issue is exposed during driver load/unload stress test.

WARNING: CPU: 5 PID: 4445 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x5f/0x70
sysfs: cannot create duplicate filename '/class/infiniband/i40iw0'
Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./Q87M-D2H
BIOS F7 01/17/2014
Workqueue: i40e i40e_service_task [i40e]
Call Trace:
dump_stack+0x67/0x98
__warn+0xcc/0xf0
warn_slowpath_fmt+0x4a/0x50
? kernfs_path_from_node+0x4b/0x60
sysfs_warn_dup+0x5f/0x70
sysfs_do_create_link_sd.isra.2+0xb7/0xc0
sysfs_create_link+0x20/0x40
device_add+0x28c/0x600
ib_device_register_sysfs+0x58/0x170 [ib_core]
ib_register_device+0x325/0x570 [ib_core]
? i40iw_register_rdma_device+0x1f4/0x400 [i40iw]
? kmem_cache_alloc_trace+0x143/0x330
? __raw_spin_lock_init+0x2d/0x50
i40iw_register_rdma_device+0x2dc/0x400 [i40iw]
i40iw_open+0x10a6/0x1950 [i40iw]
? i40iw_open+0xeab/0x1950 [i40iw]
? i40iw_make_cm_node+0x9c0/0x9c0 [i40iw]
i40e_client_subtask+0xa4/0x110 [i40e]
i40e_service_task+0xc2d/0x1320 [i40e]
process_one_work+0x203/0x710
? process_one_work+0x16f/0x710
worker_thread+0x126/0x4a0
? trace_hardirqs_on+0xd/0x10
kthread+0x112/0x150
? process_one_work+0x710/0x710
? kthread_create_on_node+0x40/0x40
ret_from_fork+0x2e/0x40
---[ end trace fd11b69e21ea7653 ]---
Couldn't register device i40iw0 with driver model

Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Sindhu Devale <sindhu.devale@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-16 11:47:55 -04:00
Leon Romanovsky
9abb0d1bbd RDMA: Simplify get firmware interface
There is a need to forward FW version to user space
application through RDMA netlink. In order to make it safe, there
is need to declare nla_policy and limit the size of FW string.

The new define IB_FW_VERSION_NAME_MAX will limit the size of
FW version string. That define was chosen to be equal to
ETHTOOL_FWVERS_LEN, because many drivers anyway are limited
by that value indirectly.

The introduction of this define allows us to remove the string size
from get_fw_str function signature.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2017-08-10 13:28:10 +03:00
Leon Romanovsky
6c80b41abe RDMA/netlink: Add nldev initialization flows
Add nldev init and exit flows to the RDMA/core.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
2017-08-10 13:28:07 +03:00
Leon Romanovsky
647c75ac59 RDMA/netlink: Convert LS to doit callback
RDMA_NL_LS protocol is actually does not dump anything,
but sets data and it should be handled by doit callback.

This patch actually converts RDMA_NL_LS to doit callback, while
preserving IWCM and RDMA_CM flows through netlink_dump_start().

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
2017-08-10 13:21:56 +03:00
Leon Romanovsky
ecc82c53f9 RDMA/core: Add and expose static device index
This patch adds static device index in similar fashion to
already available in netdev world (struct net->ifindex).

In downstream patches, the RDMA nelink will use this idx-to-ib_device
conversion, so as part of this commit, we are exposing the translation
function to be visible for IB/core users.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2017-08-10 13:21:54 +03:00
Leon Romanovsky
8030c8357a RDMA/core: Add iterator over ib_devices
The coming nldev needs to iterate over all IB devices in the system
and in order to not expose the ib_devices list outside the devices.c,
it is necessary to provide function iterator.

Current version is written explicitly for nldev callback to avoid
over-engineering at this stage, but it can be easily extended for
other types.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
2017-08-10 13:21:54 +03:00
Leon Romanovsky
3250b4dbd8 RDMA/netlink: Rename netlink callback struct
The RDMA netlink client infrastructure was removed and made obsolete.
The old infrastructure defined struct ibnl_client_cbs. Now that all
uses of this have been updated to the new infrastructure, rename the
struct to be compliant with the current stack naming standards:
struct rdma_nl_cbs.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
2017-08-10 13:20:15 +03:00
Leon Romanovsky
e3a2b93ddd RDMA/netlink: Add flag to consolidate common handling
Add ability to provide flags to control RDMA netlink callbacks
and convert addr.c and sa_query.c to be first users of such
infrastructure. It allows to move their CAP_NET_ADMIN checks
into netlink core.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
2017-08-10 13:18:45 +03:00
Leon Romanovsky
c9901724a2 RDMA/netlink: Remove netlink clients infrastructure
RDMA netlink has a complicated infrastructure for dynamically
registering and de-registering netlink clients to the NETLINK_RDMA
group. The complicated portion of this code is not widely used because
2 of the 3 current clients are statically compiled together with
netlink.c. The infrastructure, therefore, is deemed overkill.

Refactor the code to eliminate the dynamically added clients. Now all
clients are pre-registered in a client array at compile time, and at run
time they merely check-in with the infrastructure to pass their callback
table for inclusion in the pre-sized client array.

This also allows for future cleanups and removal of unneeded code in the
iwcm* netlink handler.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Chien Tin Tung <chien.tin.tung@intel.com>
2017-08-10 13:13:06 +03:00
Daniel Jurgens
a750cfde13 IB/core: Fix static analysis warning in ib_policy_change_task
ib_get_cached_subnet_prefix can technically fail, but the only way it
could is not possible based on the loop conditions. Check the return
value before using the variable sp to resolve a static analysis warning.

-v1:
- Fix check to !ret. Paul Moore

Fixes: 8f408ab64b ("selinux lsm IB/core: Implement LSM notification
system")
Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
2017-07-07 09:49:26 +10:00
Daniel Jurgens
8f408ab64b selinux lsm IB/core: Implement LSM notification system
Add a generic notificaiton mechanism in the LSM. Interested consumers
can register a callback with the LSM and security modules can produce
events.

Because access to Infiniband QPs are enforced in the setup phase of a
connection security should be enforced again if the policy changes.
Register infiniband devices for policy change notification and check all
QPs on that device when the notification is received.

Add a call to the notification mechanism from SELinux when the AVC
cache changes or setenforce is cleared.

Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Acked-by: James Morris <james.l.morris@oracle.com>
Acked-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
2017-05-23 12:27:11 -04:00
Daniel Jurgens
d291f1a652 IB/core: Enforce PKey security on QPs
Add new LSM hooks to allocate and free security contexts and check for
permission to access a PKey.

Allocate and free a security context when creating and destroying a QP.
This context is used for controlling access to PKeys.

When a request is made to modify a QP that changes the port, PKey index,
or alternate path, check that the QP has permission for the PKey in the
PKey table index on the subnet prefix of the port. If the QP is shared
make sure all handles to the QP also have access.

Store which port and PKey index a QP is using. After the reset to init
transition the user can modify the port, PKey index and alternate path
independently. So port and PKey settings changes can be a merge of the
previous settings and the new ones.

In order to maintain access control if there are PKey table or subnet
prefix change keep a list of all QPs are using each PKey index on
each port. If a change occurs all QPs using that device and port must
have access enforced for the new cache settings.

These changes add a transaction to the QP modify process. Association
with the old port and PKey index must be maintained if the modify fails,
and must be removed if it succeeds. Association with the new port and
PKey index must be established prior to the modify and removed if the
modify fails.

1. When a QP is modified to a particular Port, PKey index or alternate
   path insert that QP into the appropriate lists.

2. Check permission to access the new settings.

3. If step 2 grants access attempt to modify the QP.

4a. If steps 2 and 3 succeed remove any prior associations.

4b. If ether fails remove the new setting associations.

If a PKey table or subnet prefix changes walk the list of QPs and
check that they have permission. If not send the QP to the error state
and raise a fatal error event. If it's a shared QP make sure all the
QPs that share the real_qp have permission as well. If the QP that
owns a security structure is denied access the security structure is
marked as such and the QP is added to an error_list. Once the moving
the QP to error is complete the security structure mark is cleared.

Maintaining the lists correctly turns QP destroy into a transaction.
The hardware driver for the device frees the ib_qp structure, so while
the destroy is in progress the ib_qp pointer in the ib_qp_security
struct is undefined. When the destroy process begins the ib_qp_security
structure is marked as destroying. This prevents any action from being
taken on the QP pointer. After the QP is destroyed successfully it
could still listed on an error_list wait for it to be processed by that
flow before cleaning up the structure.

If the destroy fails the QPs port and PKey settings are reinserted into
the appropriate lists, the destroying flag is cleared, and access control
is enforced, in case there were any cache changes during the destroy
flow.

To keep the security changes isolated a new file is used to hold security
related functionality.

Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Acked-by: Doug Ledford <dledford@redhat.com>
[PM: merge fixup in ib_verbs.h and uverbs_cmd.c]
Signed-off-by: Paul Moore <paul@paul-moore.com>
2017-05-23 12:26:59 -04:00
Parav Pandit
4be3a4fa51 IB/core: Fix kernel crash during fail to initialize device
This patch fixes the kernel crash that occurs during ib_dealloc_device()
called due to provider driver fails with an error after
ib_alloc_device() and before it can register using ib_register_device().

This crashed seen in tha lab as below which can occur with any IB device
which fails to perform its device initialization before invoking
ib_register_device().

This patch avoids touching cache and port immutable structures if device
is not yet initialized.
It also releases related memory when cache and port immutable data
structure initialization fails during register_device() state.

[81416.561946] BUG: unable to handle kernel NULL pointer dereference at (null)
[81416.570340] IP: ib_cache_release_one+0x29/0x80 [ib_core]
[81416.576222] PGD 78da66067
[81416.576223] PUD 7f2d7c067
[81416.579484] PMD 0
[81416.582720]
[81416.587242] Oops: 0000 [#1] SMP
[81416.722395] task: ffff8807887515c0 task.stack: ffffc900062c0000
[81416.729148] RIP: 0010:ib_cache_release_one+0x29/0x80 [ib_core]
[81416.735793] RSP: 0018:ffffc900062c3a90 EFLAGS: 00010202
[81416.741823] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
[81416.749785] RDX: 0000000000000000 RSI: 0000000000000282 RDI: ffff880859fec000
[81416.757757] RBP: ffffc900062c3aa0 R08: ffff8808536e5ac0 R09: ffff880859fec5b0
[81416.765708] R10: 00000000536e5c01 R11: ffff8808536e5ac0 R12: ffff880859fec000
[81416.773672] R13: 0000000000000000 R14: ffff8808536e5ac0 R15: ffff88084ebc0060
[81416.781621] FS:  00007fd879fab740(0000) GS:ffff88085fac0000(0000) knlGS:0000000000000000
[81416.790522] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[81416.797094] CR2: 0000000000000000 CR3: 00000007eb215000 CR4: 00000000003406e0
[81416.805051] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[81416.812997] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[81416.820950] Call Trace:
[81416.824226]  ib_device_release+0x1e/0x40 [ib_core]
[81416.829858]  device_release+0x32/0xa0
[81416.834370]  kobject_cleanup+0x63/0x170
[81416.839058]  kobject_put+0x25/0x50
[81416.843319]  ib_dealloc_device+0x25/0x40 [ib_core]
[81416.848986]  mlx5_ib_add+0x163/0x1990 [mlx5_ib]
[81416.854414]  mlx5_add_device+0x5a/0x160 [mlx5_core]
[81416.860191]  mlx5_register_interface+0x8d/0xc0 [mlx5_core]
[81416.866587]  ? 0xffffffffa09e9000
[81416.870816]  mlx5_ib_init+0x15/0x17 [mlx5_ib]
[81416.876094]  do_one_initcall+0x51/0x1b0
[81416.880861]  ? __vunmap+0x85/0xd0
[81416.885113]  ? kmem_cache_alloc_trace+0x14b/0x1b0
[81416.890768]  ? vfree+0x2e/0x70
[81416.894762]  do_init_module+0x60/0x1fa
[81416.899441]  load_module+0x15f6/0x1af0
[81416.904114]  ? __symbol_put+0x60/0x60
[81416.908709]  ? ima_post_read_file+0x3d/0x80
[81416.913828]  ? security_kernel_post_read_file+0x6b/0x80
[81416.920006]  SYSC_finit_module+0xa6/0xf0
[81416.924888]  SyS_finit_module+0xe/0x10
[81416.929568]  entry_SYSCALL_64_fastpath+0x1a/0xa9
[81416.935089] RIP: 0033:0x7fd879494949
[81416.939543] RSP: 002b:00007ffdbc1b4e58 EFLAGS: 00000202 ORIG_RAX: 0000000000000139
[81416.947982] RAX: ffffffffffffffda RBX: 0000000001b66f00 RCX: 00007fd879494949
[81416.955965] RDX: 0000000000000000 RSI: 000000000041a13c RDI: 0000000000000003
[81416.963926] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000001b652a0
[81416.971861] R10: 0000000000000003 R11: 0000000000000202 R12: 00007ffdbc1b3e70
[81416.979763] R13: 00007ffdbc1b3e50 R14: 0000000000000005 R15: 0000000000000000
[81417.008005] RIP: ib_cache_release_one+0x29/0x80 [ib_core] RSP: ffffc900062c3a90
[81417.016045] CR2: 0000000000000000

Fixes: 55aeed0654 ("IB/core: Make ib_alloc_device init the kobject")
Fixes: 7738613e7c ("IB/core: Add per port immutable struct to ib_device")
Cc: <stable@vger.kernel.org> # v4.2+
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-04-21 12:26:05 -04:00
Sagi Grimberg
b7363e67b2 IB/device: Convert ib-comp-wq to be CPU-bound
This workqueue is used by our storage target mode ULPs
via the new CQ API. Recent observations when working
with very high-end flash storage devices reveal that
UNBOUND workqueue threads can migrate between cpu cores
and even numa nodes (although some numa locality is accounted
for).

While this attribute can be useful in some workloads,
it does not fit in very nicely with the normal
run-to-completion model we usually use in our target-mode
ULPs and the block-mq irq<->cpu affinity facilities.

The whole block-mq concept is that the completion will
land on the same cpu where the submission was performed.
The fact that our submitter thread is migrating cpus
can break this locality.

We assume that as a target mode ULP, we will serve multiple
initiators/clients and we can spread the load enough without
having to use unbound kworkers.

Also, while we're at it, expose this workqueue via sysfs which
is harmless and can be useful for debug.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>--
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-03-24 22:24:04 -04:00
Bart Van Assche
0957c29f78 IB/core: Restore I/O MMU, s390 and powerpc support
Avoid that the following error message is reported on the console
while loading an RDMA driver with I/O MMU support enabled:

DMAR: Allocating domain for mlx5_0 failed

Ensure that DMA mapping operations that use to_pci_dev() to
access to struct pci_dev see the correct PCI device. E.g. the s390
and powerpc DMA mapping operations use to_pci_dev() even with I/O
MMU support disabled.

This patch preserves the following changes of the DMA mapping updates
patch series:
- Introduction of dma_virt_ops.
- Removal of ib_device.dma_ops.
- Removal of struct ib_dma_mapping_ops.
- Removal of an if-statement from each ib_dma_*() operation.
- IB HW drivers no longer set dma_device directly.

Reported-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reported-by: Parav Pandit <parav@mellanox.com>
Fixes: commit 99db949403 ("IB/core: Remove ib_device.dma_device")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: parav@mellanox.com
Tested-by: parav@mellanox.com
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-03-24 21:51:16 -04:00
Linus Torvalds
f7878dc3a9 Merge branch 'for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup updates from Tejun Heo:
 "Several noteworthy changes.

   - Parav's rdma controller is finally merged. It is very straight
     forward and can limit the abosolute numbers of common rdma
     constructs used by different cgroups.

   - kernel/cgroup.c got too chubby and disorganized. Created
     kernel/cgroup/ subdirectory and moved all cgroup related files
     under kernel/ there and reorganized the core code. This hurts for
     backporting patches but was long overdue.

   - cgroup v2 process listing reimplemented so that it no longer
     depends on allocating a buffer large enough to cache the entire
     result to sort and uniq the output. v2 has always mangled the sort
     order to ensure that users don't depend on the sorted output, so
     this shouldn't surprise anybody. This makes the pid listing
     functions use the same iterators that are used internally, which
     have to have the same iterating capabilities anyway.

   - perf cgroup filtering now works automatically on cgroup v2. This
     patch was posted a long time ago but somehow fell through the
     cracks.

   - misc fixes asnd documentation updates"

* 'for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (27 commits)
  kernfs: fix locking around kernfs_ops->release() callback
  cgroup: drop the matching uid requirement on migration for cgroup v2
  cgroup, perf_event: make perf_event controller work on cgroup2 hierarchy
  cgroup: misc cleanups
  cgroup: call subsys->*attach() only for subsystems which are actually affected by migration
  cgroup: track migration context in cgroup_mgctx
  cgroup: cosmetic update to cgroup_taskset_add()
  rdmacg: Fixed uninitialized current resource usage
  cgroup: Add missing cgroup-v2 PID controller documentation.
  rdmacg: Added documentation for rdmacg
  IB/core: added support to use rdma cgroup controller
  rdmacg: Added rdma cgroup controller
  cgroup: fix a comment typo
  cgroup: fix RCU related sparse warnings
  cgroup: move namespace code to kernel/cgroup/namespace.c
  cgroup: rename functions for consistency
  cgroup: move v1 mount functions to kernel/cgroup/cgroup-v1.c
  cgroup: separate out cgroup1_kf_syscall_ops
  cgroup: refactor mount path and clearly distinguish v1 and v2 paths
  cgroup: move cgroup v1 specific code to kernel/cgroup/cgroup-v1.c
  ...
2017-02-27 21:41:08 -08:00
Linus Torvalds
ac1820fb28 This is a tree wide change and has been kept separate for that reason.
Bart Van Assche noted that the ib DMA mapping code was significantly
 similar enough to the core DMA mapping code that with a few changes
 it was possible to remove the IB DMA mapping code entirely and
 switch the RDMA stack to use the core DMA mapping code.  This resulted
 in a nice set of cleanups, but touched the entire tree.  This branch
 will be submitted separately to Linus at the end of the merge window
 as per normal practice for tree wide changes like this.
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Merge tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

Pull rdma DMA mapping updates from Doug Ledford:
 "Drop IB DMA mapping code and use core DMA code instead.

  Bart Van Assche noted that the ib DMA mapping code was significantly
  similar enough to the core DMA mapping code that with a few changes it
  was possible to remove the IB DMA mapping code entirely and switch the
  RDMA stack to use the core DMA mapping code.

  This resulted in a nice set of cleanups, but touched the entire tree
  and has been kept separate for that reason."

* tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (37 commits)
  IB/rxe, IB/rdmavt: Use dma_virt_ops instead of duplicating it
  IB/core: Remove ib_device.dma_device
  nvme-rdma: Switch from dma_device to dev.parent
  RDS: net: Switch from dma_device to dev.parent
  IB/srpt: Modify a debug statement
  IB/srp: Switch from dma_device to dev.parent
  IB/iser: Switch from dma_device to dev.parent
  IB/IPoIB: Switch from dma_device to dev.parent
  IB/rxe: Switch from dma_device to dev.parent
  IB/vmw_pvrdma: Switch from dma_device to dev.parent
  IB/usnic: Switch from dma_device to dev.parent
  IB/qib: Switch from dma_device to dev.parent
  IB/qedr: Switch from dma_device to dev.parent
  IB/ocrdma: Switch from dma_device to dev.parent
  IB/nes: Remove a superfluous assignment statement
  IB/mthca: Switch from dma_device to dev.parent
  IB/mlx5: Switch from dma_device to dev.parent
  IB/mlx4: Switch from dma_device to dev.parent
  IB/i40iw: Remove a superfluous assignment statement
  IB/hns: Switch from dma_device to dev.parent
  ...
2017-02-25 13:45:43 -08:00
Yuval Shaia
24dc831b77 IB/core: Add inline function to validate port
Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-27 14:33:59 -05:00
Bart Van Assche
99db949403 IB/core: Remove ib_device.dma_device
Add code in ib_register_device() for copying the DMA masks. Use
&ib_device.dev in DMA mapping operations instead of dma_device.
Remove ib_device.dma_device because due to this and previous patches
it is no longer used.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-24 12:26:17 -05:00
Bart Van Assche
97a9ea8480 IB/core: Initialize ib_device.dev.parent earlier
Move the ib_device.dev.parent initialization code from
ib_device_register_sysfs() to ib_register_device(). Additionally,
allow HBA drivers to set ib_device.dev.parent without setting
ib_device.dma_device. This is the first step towards removing
ib_device.dma_device.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-24 12:23:35 -05:00
Parav Pandit
43579b5f2c IB/core: added support to use rdma cgroup controller
Added support APIs for IB core to register/unregister every IB/RDMA
device with rdma cgroup for tracking rdma resources.
IB core registers with rdma cgroup controller.
Added support APIs for uverbs layer to make use of rdma controller.
Added uverbs layer to perform resource charge/uncharge functionality.
Added support during query_device uverb operation to ensure it
returns resource limits by honoring rdma cgroup configured limits.

Signed-off-by: Parav Pandit <pandit.parav@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2017-01-10 11:14:27 -05:00
Leon Romanovsky
a0b3455fcb IB/core: Remove debug prints after allocation failure
The prints after [k|v][m|z|c]alloc() functions are not needed,
because in case of failure, allocator will print their internal
error prints anyway.

Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-03 13:12:52 -05:00
Ira Weiny
5fa76c2045 IB/core: Add get FW version string to the core
Allow for a common core function to get firmware version strings
from the individual devices.

In later patches this format can then then be used to pass a
properly formated version string through the IPoIB layer.

The problem with the current code in the IPoIB layer is that it is
specific to certain hardware types.

Furthermore, this gives us a common function through which the core
can provide a common sysfs entry.  Eventually we may want to
remove the sysfs export but this provides for user space backwards
compatibility.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-06-23 12:08:33 -04:00
Eli Cohen
d7012467a9 IB/core: Fix query port failure in RoCE
Currently ib_query_port always attempts to to read the subnet prefix by
calling ib_query_gid(). For RoCE/iWARP there is no subnet manager and no
subnet prefix. Fix this by querying GID[0] only for IB networks.

Fixes: fad61ad4e7 ('IB/core: Add subnet prefix to port info')
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-06-07 09:50:52 -04:00
Dan Carpenter
da1f857be6 IB/core: fix an error code in ib_core_init()
We should return the error code if ib_add_ibnl_clients() fails.  The
current code returns success.

Fixes: 735c631ae9 ('IB/core: Register SA ibnl client during ib_core initialization')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-06-06 19:19:07 -04:00
Mark Bloch
ae43f82867 IB/core: Add IP to GID netlink offload
There is an assumption that rdmacm is used only between nodes
in the same IB subnet, this why ARP resolution can be used to turn
IP to GID in rdmacm.

When dealing with IB communication between subnets this assumption
is no longer valid. ARP resolution will get us the next hop device
address and not the peer node's device address.

To solve this issue, we will check user space if it can provide the
GID of the peer node, and fail if not.

We add a sequence number to identify each request and fill in the GID
upon answer from userspace.

Signed-off-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-05-24 14:44:04 -04:00
Mark Bloch
735c631ae9 IB/core: Register SA ibnl client during ib_core initialization
Move SA ibnl client registration to ib_core module init.
This will allow us to register a single client to handle
all RDMA_NL_LS operations and make it SA independent.

Signed-off-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-05-24 14:43:43 -04:00
Mark Bloch
c2e49c9232 IB/SA: Integrate ib_sa module into ib_core module
Consolidate ib_sa into ib_core, this commit eliminates
ib_sa.ko and makes it part of ib_core.ko

Signed-off-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-05-24 14:42:36 -04:00
Mark Bloch
4c2cb42204 IB/MAD: Integrate ib_mad module into ib_core module
Consolidate ib_mad into ib_core, this commit eliminates
ib_mad.ko and makes it part of ib_core.ko

Signed-off-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-05-24 14:40:13 -04:00
Leon Romanovsky
e3f20f0286 IB/core: Integrate IB address resolution module into core
IB address resolution is declared as a module (ib_addr.ko) which loads
itself before IB core module (ib_core.ko).

It causes to the scenario where IB netlink which is initialized by IB
core can't be used by ib_addr.ko.

In order to solve it, we are converting ib_addr.ko to be part of
IB core module.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-05-24 14:40:13 -04:00
Eli Cohen
fad61ad4e7 IB/core: Add subnet prefix to port info
The subnet prefix is a part of the port_info MAD returned and should be
available at the ib_port_attr struct. We define it here and provide a
default implementation in case the hardware driver does not provide one.
The subnet prefix is required when creating the address vector to access
the SA in networks where GRH must be used.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-03-21 16:34:06 -04:00
Parav Pandit
aba25a3e96 IB/core: trivial prink cleanup.
1. Replaced printk with appropriate pr_warn, pr_err, pr_info.
2. Removed unnecessary prints around memory allocation failure
which are not required, as reported by the checkpatch script.

Signed-off-by: Parav Pandit <pandit.parav@gmail.com>
Reviewed-by: Haggai Eran <haggaie@mellanox.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-03-03 10:20:25 -05:00
Leon Romanovsky
5adebafb75 IB/core: Fix missed clean call in registration path
In case of failure returned from query function in
IB device registration, we need to clean IB cache which
was missed.

This change fixes it.

Fixes: 3e153a93a1 ('IB/core: Save the device attributes on the device
structure')
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-02-29 20:41:47 -05:00
Matan Barak
b39ffa1df5 IB/core: Add gid_type to gid attribute
In order to support multiple GID types, we need to store the gid_type
with each GID. This is also aligned with the RoCE v2 annex "RoCEv2 PORT
GID table entries shall have a "GID type" attribute that denotes the L3
Address type". The currently supported GID is IB_GID_TYPE_IB which is
also RoCE v1 GID type.

This implies that gid_type should be added to roce_gid_table meta-data.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-12-23 10:35:10 -05:00
Doug Ledford
882f3b3b91 Merge branches '4.5/Or-cleanup' and '4.5/rdma-cq' into k.o/for-4.5
Signed-off-by: Doug Ledford <dledford@redhat.com>

Conflicts:
	drivers/infiniband/ulp/iser/iser_verbs.c
2015-12-22 17:03:15 -05:00