1. 20 Jul, 2017 16 commits
  2. 18 Jul, 2017 19 commits
  3. 17 Jul, 2017 5 commits
    • Moni Shoua's avatar
      IB/core: Don't resolve IP address to the loopback device · cbd09aeb
      Moni Shoua authored
      When resolving an IP address that is on the host of the caller the
      result from querying the routing table is the loopback device. This is
      not a valid response, because it doesn't represent the RDMA device and
      the port.
      
      Therefore, callers need to check the resolved device and if it is a
      loopback device find an alternative way to resolve it. To avoid this we
      make sure that the response from rdma_resolve_ip() will not be the
      loopback device.
      
      While that, we fix an static checker warning about dereferencing an
      unintitialized pointer using the same solution as in commit abeffce9
      ("net/mlx5e: Fix a -Wmaybe-uninitialized warning") as a reference.
      Signed-off-by: default avatarMoni Shoua <monis@mellanox.com>
      Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      cbd09aeb
    • Moni Shoua's avatar
      IB/core: Namespace is mandatory input for address resolution · bebb2a47
      Moni Shoua authored
      In function addr_resolve() the namespace is a required input parameter
      and not an output. It is passed later for searching the routing table
      and device addresses. Also, it shouldn't be copied back to the caller.
      
      Fixes: 565edd1d ('IB/addr: Pass network namespace as a parameter')
      Cc: <stable@vger.kernel.org> # v4.3+
      Signed-off-by: default avatarMoni Shoua <monis@mellanox.com>
      Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      bebb2a47
    • Vladimir Neyelov's avatar
      IB/iser: Fix connection teardown race condition · c8c16d3b
      Vladimir Neyelov authored
      Under heavy iser target(scst) start/stop stress during login/logout
      on iser intitiator side happened trace call provided below.
      
      The function iscsi_iser_slave_alloc iser_conn pointer could be NULL,
      due to the fact that function iscsi_iser_conn_stop can be called before
      and free iser connection. Let's protect that flow by introducing global mutex.
      
      BUG: unable to handle kernel paging request at 0000000000001018
      IP: [<ffffffffc0426f7e>] iscsi_iser_slave_alloc+0x1e/0x50 [ib_iser]
      Call Trace:
      ? scsi_alloc_sdev+0x242/0x300
      scsi_probe_and_add_lun+0x9e1/0xea0
      ? kfree_const+0x21/0x30
      ? kobject_set_name_vargs+0x76/0x90
      ? __pm_runtime_resume+0x5b/0x70
      __scsi_scan_target+0xf6/0x250
      scsi_scan_target+0xea/0x100
      iscsi_user_scan_session.part.13+0x101/0x130 [scsi_transport_iscsi]
      ? iscsi_user_scan_session.part.13+0x130/0x130 [scsi_transport_iscsi]
      iscsi_user_scan_session+0x1e/0x30 [scsi_transport_iscsi]
      device_for_each_child+0x50/0x90
      iscsi_user_scan+0x44/0x60 [scsi_transport_iscsi]
      store_scan+0xa8/0x100
      ? common_file_perm+0x5d/0x1c0
      dev_attr_store+0x18/0x30
      sysfs_kf_write+0x37/0x40
      kernfs_fop_write+0x12c/0x1c0
      __vfs_write+0x18/0x40
      vfs_write+0xb5/0x1a0
      SyS_write+0x55/0xc0
      
      Fixes: 318d311e ("iser: Accept arbitrary sg lists mapping if the device supports it")
      Cc: <stable@vger.kernel.org> # v4.5+
      Signed-off-by: default avatarVladimir Neyelov <vladimirn@mellanox.com>
      Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
      Reviewed-by: default avatarSagi Grimberg <sagi@grimbeg.me>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      c8c16d3b
    • Gustavo A. R. Silva's avatar
      RDMA/core: Document confusing code · 28b5b3a2
      Gustavo A. R. Silva authored
      While looking into Coverity ID 1351047 I ran into the following
      piece of code at
      drivers/infiniband/core/verbs.c:496:
      
      ret = rdma_addr_find_l2_eth_by_grh(&dgid, &sgid,
                                         ah_attr->dmac,
                                         wc->wc_flags & IB_WC_WITH_VLAN ?
                                         NULL : &vlan_id,
                                         &if_index, &hoplimit);
      
      The issue here is that the position of arguments in the call to
      rdma_addr_find_l2_eth_by_grh() function do not match the order of
      the parameters:
      
      &dgid is passed to sgid
      &sgid is passed to dgid
      
      This is the function prototype:
      
      int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid,
       				 const union ib_gid *dgid,
       				 u8 *dmac, u16 *vlan_id, int *if_index,
       				 int *hoplimit)
      
      My question here is if this is intentional?
      
      Answer:
      Yes. ib_init_ah_from_wc() creates ah from the incoming packet.
      Incoming packet has dgid of the receiver node on which this code is
      getting executed and sgid contains the GID of the sender.
      
      When resolving mac address of destination, you use arrived dgid as
      sgid and use sgid as dgid because sgid contains destinations GID whom to
      respond to.
      Signed-off-by: default avatarGustavo A. R. Silva <garsilva@embeddedor.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      28b5b3a2
    • Bart Van Assche's avatar
      mlx5: Avoid that mlx5_ib_sg_to_klms() overflows the klms[] array · 99975cd4
      Bart Van Assche authored
      ib_map_mr_sg() can pass an SG-list to .map_mr_sg() that is larger
      than what fits into a single MR. .map_mr_sg() must not attempt to
      map more SG-list elements than what fits into a single MR.
      Hence make sure that mlx5_ib_sg_to_klms() does not write outside
      the MR klms[] array.
      
      Fixes: b005d316 ("mlx5: Add arbitrary sg list support")
      Signed-off-by: default avatarBart Van Assche <bart.vanassche@sandisk.com>
      Reviewed-by: default avatarMax Gurtovoy <maxg@mellanox.com>
      Cc: Sagi Grimberg <sagi@grimberg.me>
      Cc: Leon Romanovsky <leonro@mellanox.com>
      Cc: Israel Rukshin <israelr@mellanox.com>
      Cc: <stable@vger.kernel.org>
      Acked-by: default avatarLeon Romanovsky <leonro@mellanox.com>
      Reviewed-by: default avatarSagi Grimberg <sagi@grimberg.me>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      99975cd4