[SRU][N:linux-azure][PATCH v3 0/8] azure: backport various SMB multichannel fixes

[Vinicius Peixoto]

BugLink: https://bugs.launchpad.net/bugs/2118807

[Impact]

Users of the Azure kernel have been experiencing instabilities when using
SMB multichannel mounts, especially when the share migrates to a new
server.

[Fix]

Microsoft has pointed us to the following patches, all of which have
already been merged to mainline as well as several stable branches:

cifs: reset connections for all channels when reconnect requested (upstream 6.1, 6.6, 6.12, 6.15, and 6.16)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1f396b9bfe39aaf55ea74a7005806164b236653d

cifs: update dstaddr whenever channel iface is updated (upstream 6.6, 6.12, 6.15, and 6.16)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c1846893991f3b4ec8a0cc12219ada153f0814d6

cifs: dns resolution is needed only for primary channel (upstream 6.6, 6.12, 6.15, and 6.16)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4f60a053a2534c3e510ba0c1f8727566adf8317

cifs: deal with the channel loading lag while picking channels (upstream 6.6, 6.12, 6.15, and 6.16)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=66d590b828b1fd9fa337047ae58fe1c4c6f43609

cifs: serialize other channels when query server interfaces is pending (upstream 6.6, 6.12, 6.15, and 6.16)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b5e3e6e28cf3853566ba5d816f79aba5be579158

cifs: do not disable interface polling on failure (upstream 6.6, 6.12, 6.15, and 6.16)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=42ca547b13a20e7cbb04fbdf8d5f089ac4bb35b7

smb: client: fix potential deadlock when reconnecting channels (upstream 6.6, 6.12, 6.15, and 6.16)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=711741f94ac3cf9f4e3aa73aa171e76d188c0819

smb: client: fix warning when reconnecting channel (upstream 6.6, 6.12, 6.15, and 6.16)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3bbe46716092d8ef6b0df4b95 6f585c5cd0fc78e

All patches above have been cleanly cherry-picked into the Noble/Plucky
linux-azure trees.

[Test plan]

Build tested only; Microsoft will validate the bug fix.

[Where problems could occur]

The changes here could cause errors when managing SMB filesystems with channels connected to multiple different servers.

[Other info]
SF #00413632

Paulo Alcantara (2):
  smb: client: fix potential deadlock when reconnecting channels
  smb: client: fix warning when reconnecting channel

Shyam Prasad N (6):
  cifs: reset connections for all channels when reconnect requested
  cifs: update dstaddr whenever channel iface is updated
  cifs: dns resolution is needed only for primary channel
  cifs: deal with the channel loading lag while picking channels
  cifs: serialize other channels when query server interfaces is pending
  cifs: do not disable interface polling on failure

 fs/smb/client/cifsglob.h  |  3 ++
 fs/smb/client/connect.c   | 74 ++++++++++++++++++++++++---------------
 fs/smb/client/sess.c      |  4 +++
 fs/smb/client/smb2pdu.c   | 37 +++++++++++++-------
 fs/smb/client/transport.c | 14 ++++----
 5 files changed, 84 insertions(+), 48 deletions(-)

-- 
2.45.2