Use Azure host for time keeping in all images

[Joseph Salisbury]

SRU Justification:

[Impact]

Microsoft would like to request a change to the time keeping method in the Azure images.

We would like to request that an Azure image uses the Azure host for time sync by default. This will require the use of the Chrony package.

The Chrony package would need to be installed by default in all images and be configured to use /dev/ptp0 for timekeeping.

There is a request for two patches to be backported so Chrony time can stay in sync before being set as the default.

Patches are already in the 5.8 kernel. Only needed for azure 5.4 and 4.15

[Fix]

backport these two patches:
b46b4a8a57c3 ("hv_utils: drain the timesync packets on onchannelcallback")
90b125f4cd26 ("hv_utils: return error if host timesysnc update is stale")

[Test Case]

Desired test cases:
 - verify Chrony time can stay in sync
 - verify caller is notified if host timesync update is stale
 - verify all timesync packets are drained on onchannelcallback to avoid stale packets

Microsoft holds test cases for the above. They verified a 4.15 and 5.4 test kernels with the above patches backported to work as expected.

[Regression Potential]

Caller may get an error now if host timesync messages were not processed by the guest. This wasn't getting reported to the caller before and may appear to be a regression if it occurs.

Regression potential may also lay in still incorrectly managing timesync packets on onchannelcallback.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-azure - 5.4.0-1039.41

---------------
linux-azure (5.4.0-1039.41) focal; urgency=medium

  * focal/linux-azure: 5.4.0-1039.41 -proposed tracker (LP: #1912002)

  * Use Azure host for time keeping in all images (LP: #1896784)
    - hv_utils: return error if host timesysnc update is stale
    - hv_utils: drain the timesync packets on onchannelcallback

  * [linux-azure] Batch hibernate and resume IO requests (LP: #1904458)
    - PM: hibernate: Batch hibernate and resume IO requests

linux-azure (5.4.0-1038.40) focal; urgency=medium

  * focal/linux-azure: 5.4.0-1038.40 -proposed tracker (LP: #1911317)

  [ Ubuntu: 5.4.0-63.71 ]

  * focal/linux: 5.4.0-63.71 -proposed tracker (LP: #1911333)
  * overlay: permission regression in 5.4.0-51.56 due to patches related to
    CVE-2020-16120 (LP: #1900141)
    - ovl: do not fail because of O_NOATIME
  * Focal update: v5.4.79 upstream stable release (LP: #1907151)
    - net/mlx5: Use async EQ setup cleanup helpers for multiple EQs
    - net/mlx5: poll cmd EQ in case of command timeout
    - net/mlx5: Fix a race when moving command interface to events mode
    - net/mlx5: Add retry mechanism to the command entry index allocation
  * Kernel 5.4.0-56 Wi-Fi does not connect (LP: #1906770)
    - mt76: fix fix ampdu locking
  * [Ubuntu 21.04 FEAT] mpt3sas: Request to include the patch set which supports
    topology where zoning is enabled in expander (LP: #1899802)
    - scsi: mpt3sas: Define hba_port structure
    - scsi: mpt3sas: Allocate memory for hba_port objects
    - scsi: mpt3sas: Rearrange _scsih_mark_responding_sas_device()
    - scsi: mpt3sas: Update hba_port's sas_address & phy_mask
    - scsi: mpt3sas: Get device objects using sas_address & portID
    - scsi: mpt3sas: Rename transport_del_phy_from_an_existing_port()
    - scsi: mpt3sas: Get sas_device objects using device's rphy
    - scsi: mpt3sas: Update hba_port objects after host reset
    - scsi: mpt3sas: Set valid PhysicalPort in SMPPassThrough
    - scsi: mpt3sas: Handling HBA vSES device
    - scsi: mpt3sas: Add bypass_dirty_port_flag parameter
    - scsi: mpt3sas: Handle vSES vphy object during HBA reset
    - scsi: mpt3sas: Add module parameter multipath_on_hba
    - scsi: mpt3sas: Bump driver version to 35.101.00.00

  [ Ubuntu: 5.4.0-62.70 ]

  * focal/linux: 5.4.0-62.70 -proposed tracker (LP: #1911144)
  * CVE-2020-28374
    - SAUCE: target: fix XCOPY NAA identifier lookup
  * Packaging resync (LP: #1786013)
    - update dkms package versions

 -- Marcelo Henrique Cerri <email address hidden> Mon, 18 Jan 2021 09:44:59 -0300

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-azure-4.15 - 4.15.0-1106.118

---------------
linux-azure-4.15 (4.15.0-1106.118) bionic; urgency=medium

  * bionic/linux-azure-4.15: 4.15.0-1106.118 -proposed tracker (LP: #1911280)

  [ Ubuntu: 4.15.0-133.137 ]

  * bionic/linux: 4.15.0-133.137 -proposed tracker (LP: #1911295)
  * [drm:qxl_enc_commit [qxl]] *ERROR* head number too large or missing monitors
    config: (LP: #1908219)
    - qxl: remove qxl_io_log()
    - qxl: move qxl_send_monitors_config()
    - qxl: hook monitors_config updates into crtc, not encoder.
  * Touchpad not detected on ByteSpeed C15B laptop (LP: #1906128)
    - Input: i8042 - add ByteSpeed touchpad to noloop table
  * vmx_nm_test in ubuntu_kvm_unit_tests interrupted on X-oracle-4.15 /
    B-oracle-4.15 / X-KVM / B-KVM (LP: #1872401)
    - KVM: nVMX: Always reflect #NM VM-exits to L1
  * stack trace in kernel (LP: #1903596)
    - net: napi: remove useless stack trace
  * CVE-2020-27777
    - [Config]: Set CONFIG_PPC_RTAS_FILTER
  * Bionic update: upstream stable patchset 2020-12-04 (LP: #1906875)
    - regulator: defer probe when trying to get voltage from unresolved supply
    - ring-buffer: Fix recursion protection transitions between interrupt context
    - time: Prevent undefined behaviour in timespec64_to_ns()
    - nbd: don't update block size after device is started
    - btrfs: sysfs: init devices outside of the chunk_mutex
    - btrfs: reschedule when cloning lots of extents
    - genirq: Let GENERIC_IRQ_IPI select IRQ_DOMAIN_HIERARCHY
    - hv_balloon: disable warning when floor reached
    - net: xfrm: fix a race condition during allocing spi
    - perf tools: Add missing swap for ino_generation
    - ALSA: hda: prevent undefined shift in snd_hdac_ext_bus_get_link()
    - can: rx-offload: don't call kfree_skb() from IRQ context
    - can: dev: can_get_echo_skb(): prevent call to kfree_skb() in hard IRQ
      context
    - can: dev: __can_get_echo_skb(): fix real payload length return value for RTR
      frames
    - can: can_create_echo_skb(): fix echo skb generation: always use skb_clone()
    - can: peak_usb: add range checking in decode operations
    - can: peak_usb: peak_usb_get_ts_time(): fix timestamp wrapping
    - can: peak_canfd: pucan_handle_can_rx(): fix echo management when loopback is
      on
    - xfs: flush new eof page on truncate to avoid post-eof corruption
    - Btrfs: fix missing error return if writeback for extent buffer never started
    - ath9k_htc: Use appropriate rs_datalen type
    - usb: gadget: goku_udc: fix potential crashes in probe
    - gfs2: Free rd_bits later in gfs2_clear_rgrpd to fix use-after-free
    - gfs2: Add missing truncate_inode_pages_final for sd_aspace
    - gfs2: check for live vs. read-only file system in gfs2_fitrim
    - scsi: hpsa: Fix memory leak in hpsa_init_one()
    - drm/amdgpu: perform srbm soft reset always on SDMA resume
    - mac80211: fix use of skb payload instead of header
    - cfg80211: regulatory: Fix inconsistent format argument
    - scsi: scsi_dh_alua: Avoid crash during alua_bus_detach()
    - iommu/amd: Increase interrupt remapping table limit to 512 entries
    - pinctrl: intel: Set default...

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-azure - 4.15.0-1106.118~16.04.1

---------------
linux-azure (4.15.0-1106.118~16.04.1) xenial; urgency=medium

  * xenial/linux-azure: 4.15.0-1106.118~16.04.1 -proposed tracker (LP: #1911278)

  [ Ubuntu: 4.15.0-1106.118 ]

  * bionic/linux-azure-4.15: 4.15.0-1106.118 -proposed tracker (LP: #1911280)
  * bionic/linux: 4.15.0-133.137 -proposed tracker (LP: #1911295)
  * [drm:qxl_enc_commit [qxl]] *ERROR* head number too large or missing monitors
    config: (LP: #1908219)
    - qxl: remove qxl_io_log()
    - qxl: move qxl_send_monitors_config()
    - qxl: hook monitors_config updates into crtc, not encoder.
  * Touchpad not detected on ByteSpeed C15B laptop (LP: #1906128)
    - Input: i8042 - add ByteSpeed touchpad to noloop table
  * vmx_nm_test in ubuntu_kvm_unit_tests interrupted on X-oracle-4.15 /
    B-oracle-4.15 / X-KVM / B-KVM (LP: #1872401)
    - KVM: nVMX: Always reflect #NM VM-exits to L1
  * stack trace in kernel (LP: #1903596)
    - net: napi: remove useless stack trace
  * CVE-2020-27777
    - [Config]: Set CONFIG_PPC_RTAS_FILTER
  * Bionic update: upstream stable patchset 2020-12-04 (LP: #1906875)
    - regulator: defer probe when trying to get voltage from unresolved supply
    - ring-buffer: Fix recursion protection transitions between interrupt context
    - time: Prevent undefined behaviour in timespec64_to_ns()
    - nbd: don't update block size after device is started
    - btrfs: sysfs: init devices outside of the chunk_mutex
    - btrfs: reschedule when cloning lots of extents
    - genirq: Let GENERIC_IRQ_IPI select IRQ_DOMAIN_HIERARCHY
    - hv_balloon: disable warning when floor reached
    - net: xfrm: fix a race condition during allocing spi
    - perf tools: Add missing swap for ino_generation
    - ALSA: hda: prevent undefined shift in snd_hdac_ext_bus_get_link()
    - can: rx-offload: don't call kfree_skb() from IRQ context
    - can: dev: can_get_echo_skb(): prevent call to kfree_skb() in hard IRQ
      context
    - can: dev: __can_get_echo_skb(): fix real payload length return value for RTR
      frames
    - can: can_create_echo_skb(): fix echo skb generation: always use skb_clone()
    - can: peak_usb: add range checking in decode operations
    - can: peak_usb: peak_usb_get_ts_time(): fix timestamp wrapping
    - can: peak_canfd: pucan_handle_can_rx(): fix echo management when loopback is
      on
    - xfs: flush new eof page on truncate to avoid post-eof corruption
    - Btrfs: fix missing error return if writeback for extent buffer never started
    - ath9k_htc: Use appropriate rs_datalen type
    - usb: gadget: goku_udc: fix potential crashes in probe
    - gfs2: Free rd_bits later in gfs2_clear_rgrpd to fix use-after-free
    - gfs2: Add missing truncate_inode_pages_final for sd_aspace
    - gfs2: check for live vs. read-only file system in gfs2_fitrim
    - scsi: hpsa: Fix memory leak in hpsa_init_one()
    - drm/amdgpu: perform srbm soft reset always on SDMA resume
    - mac80211: fix use of skb payload instead of header
    - cfg80211: regulatory: Fix inconsistent format argument
    - scsi: scsi_dh_alua: Avoid crash during alua_bus_detach()
    - iommu/amd: I...