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[Launchpad Bug Tracker <1540435@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 4.4.0-6.21

---------------
linux (4.4.0-6.21) xenial; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1546283

  *  Naples/Zen, NTB Driver  (LP: #1542071)
    - [Config] CONFIG_NTB_AMD=m
    - NTB: Add support for AMD PCI-Express Non-Transparent Bridge

  * [Hyper-V] kernel panic occurs when installing Ubuntu Server x32 (LP: #1495983)
    - SAUCE: storvsc: use small sg_tablesize on x86

  * Enable arm64 emulation of removed ARMv7 instructions (LP: #1545542)
    - [Config] CONFIG_ARMV8_DEPRECATED=y

  * Surelock-GA2:kernel panic/ exception @ pcibios_set_pcie_reset_state+0x118/0x280 + cxl_reset+0x5c/0xc0 (LP: #1545037)
    - powerpc/eeh: Fix stale cached primary bus

  * Miscellaneous Ubuntu changes
    - SAUCE: fs: Add user namesapace member to struct super_block
    - SAUCE: fs: Limit file caps to the user namespace of the super block
    - SAUCE: Smack: Add support for unprivileged mounts from user namespaces
    - SAUCE: block_dev: Support checking inode permissions in lookup_bdev()
    - SAUCE: block_dev: Check permissions towards block device inode when mounting
    - SAUCE: fs: Treat foreign mounts as nosuid
    - SAUCE: selinux: Add support for unprivileged mounts from user namespaces
    - SAUCE: userns: Replace in_userns with current_in_userns
    - SAUCE: Smack: Handle labels consistently in untrusted mounts
    - SAUCE: fs: Check for invalid i_uid in may_follow_link()
    - SAUCE: cred: Reject inodes with invalid ids in set_create_file_as()
    - SAUCE: fs: Refuse uid/gid changes which don't map into s_user_ns
    - SAUCE: fs: Update posix_acl support to handle user namespace mounts
    - SAUCE: fs: Ensure the mounter of a filesystem is privileged towards its inodes
    - SAUCE: fs: Don't remove suid for CAP_FSETID in s_user_ns
    - SAUCE: fs: Allow superblock owner to access do_remount_sb()
    - SAUCE: capabilities: Allow privileged user in s_user_ns to set security.* xattrs
    - SAUCE: fuse: Add support for pid namespaces
    - SAUCE: fuse: Support fuse filesystems outside of init_user_ns
    - SAUCE: fuse: Restrict allow_other to the superblock's namespace or a descendant
    - SAUCE: fuse: Allow user namespace mounts
    - SAUCE: mtd: Check permissions towards mtd block device inode when mounting
    - SAUCE: fs: Update i_[ug]id_(read|write) to translate relative to s_user_ns
    - SAUCE: quota: Convert ids relative to s_user_ns
    - SAUCE: evm: Translate user/group ids relative to s_user_ns when computing HMAC
    - SAUCE: fs: Allow CAP_SYS_ADMIN in s_user_ns to freeze and thaw filesystems
    - SAUCE: quota: Treat superblock owner as privilged
    - SAUCE: ima/evm: Allow root in s_user_ns to set xattrs
    - SAUCE: block_dev: Forbid unprivileged mounting when device is opened for writing
    - SAUCE: ext4: Add support for unprivileged mounts from user namespaces
    - SAUCE: ext4: Add module parameter to enable user namespace mounts
    - SAUCE: fuse: Add module parameter to enable user namespace mounts

  * Miscellaneous upstream changes
    - megaraid: Fix possible NULL pointer deference in mraid_mm_ioctl
    - libahci: Implement the capability to override the generic ahci interrupt handler.
    - ata: Remove the AHCI_HFLAG_EDGE_IRQ support from libahci.
    - ahci_xgene: Implement the workaround to fix the missing of the edge interrupt for the HOST_IRQ_STAT.

 -- Tim Gardner <tim.gardner@xxxxxxxxxxxxx>  Fri, 12 Feb 2016 09:49:05
-0700

** Changed in: linux (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1540435

Title:
  Introducing ConnectX-4 Ethernet SRIOV

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  Hi,

  This patchset introduces the support of Ethernet SRIOV in ConnectX-4 
  family of 100G Ethernet NICs.

  Basic Introduction:
  ConnectX-4 HW architecture provides two kinds of underlying HW switches.

  MPFS (Multi Physical Function Switch) or L2 Table in Software terms:

  The HCA has one MPFS switch per physical port, this switch is responsible
  of forwarding Unicast traffic to the various overlying Physical Functions (PFs). 
  Multicast traffic is flooded amongst all the PFs, Each PF can request to
  forward a unicast MAC to its E-Switch Uplink vport (which we will cover later) 
  through SET_L2_TABLE_ENTRY HW command.

  MPFS has five ports, four are connected to PFs (one for each) and one is connected 
  directly to the Physical Port (Physical Link).

  E-Switch (Ethernet Switch):

  The HCA has one per physical function. The main responsibility of this component is 
  to forward Unicast/Multicast and vlan tagged/untagged traffic to the various 
  Virtual Functions (VFs) allocated by the PF. Unlike MPFS, the PF needs to explicitly 
  create the E-Switch FDB table, Which is a HW flow table managed by the PF driver 
  whenever vport_group_manager capability bit is set for this PF.

  E-Switch has Virtual Ports (vports) entities as its ports, vport0 and uplink vport
  are special kind of vports that represents PF vport (vport0) and uplink vport which
  is connected to the MPFS switch (if exists) as the PF external link.
  vport1..vportN represent VF0..VF(N-1) egress/ingress ports.

  E-Switch FDB contains forwarding rules such as:
          UC MAC0 -> vport0(PF).
          UC MAC1 -> vport1.
          UC MAC2 -> vport2.
          MC MACX -> vport0, vport2, Uplink.
          MC MACY -> vport1, Uplink.
      
      For unmatched traffic FDB has the following default rules:
          Unmatched Traffic (src vport != Uplink) -> Uplink.
          Unmatched Traffic (src vport == Uplink) -> vport0(PF).

  NIC VPort context: 
  Each NIC (VF/PF) has its own vport context which will be used to store the current
  NIC vport context (UC/MC and vlan lists) and other NIC properties such as MTU, promisc 
  mode, etc.. NIC (VF/PF) driver is responsible of constantly updating this context.

  FDB rules population:
  Each NIC vport (VF/PF) will notify E-Switch manager of its UC/MC vport
  context changes via modify vport context command, which will be
  translated to an event that will be handled by E-Switch manager (PF)
  which will update FDB table accordingly.

  Both PF and VF use the same driver and submit commands directly to the firmware.
  The PF sees the vport_group_manager capability bit and as such runs the code
  to populate the embedded switches as explained above.

  The patch goes as follows:

  Patches 1-2 introduces the basic PCI SRIOV functionalities and the support of
  Connectx4 to enable specific VFs via enable/disable HCA commands. These two
  patches will be also in use later for the IB SRIOV flow.

  Patches 3-8 Introduces the basic E-Switch capabilities and commands to be used later by
  VF to modify and update its NIC vport context, and by PF (E-Switch Manager) driver to
  Query the VF NIC context and acts accordingly.

  Patches 9-10 Provide the needed functionality of a NIC driver VF/PF to support SRIOV,
  mainly vport context update support.

  Patch 11 ("net/mlx5: Introducing E-Switch and l2 table"), Introduces the basic
  E-Switch support and infrastructure to read vport context events and to update
  MPFS L2 Table of the UC mac addresses request by the PF.

  Patches 12-18 Introduces SRIOV enablemenet and E-Switch FDB table management
  It adds the Basic E-Swtich public API to set and get sriov properties to be used
  in PF netdev sriov ndos.

  Patchset was applied ontop of commit 3f8c0f7 "gianfar: use
  of_property_read_bool()"

  Saeed, Eli and Or.

  Eli Cohen (2):
    net/mlx5_core: Modify enable/disable hca functions
    net/mlx5_core: Add base sriov support

  Saeed Mahameed (18):
    net/mlx5: Add HW capabilities and structs for SR-IOV E-Switch.
    net/mlx5: Update access functions to Query/Modify vport MAC address
    net/mlx5: Introduce access functions to modify/query vport mac lists
    net/mlx5: Introduce access functions to modify/query vport state
    net/mlx5: Introduce access functions to modify/query vport promisc mode
    net/mlx5: Introduce access functions to modify/query vport vlans
    net/mlx5e: Write UC/MC list and promisc mode into vport context
    net/mlx5e: Write vlan list into vport context
    net/mlx5: Introducing E-Switch and l2 table
    net/mlx5: E-Switch, Introduce FDB hardware capabilities
    net/mlx5: E-Switch, Add SR-IOV (FDB) support
    net/mlx5: E-Switch, Introduce Vport administration functions
    net/mlx5: E-Switch, Introduce HCA cap and E-Switch vport context
    net/mlx5: E-Switch, Introduce set vport vlan (VST mode)
    net/mlx5: E-Switch, Introduce get vf statistics
    net/mlx5e: Add support for SR-IOV ndos
   net/mlx5e: Assign random MAC address if needed
   net/mlx5: Fix query E-Switch capabilities

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