Comment 0 for bug 1929831

SRU Justification

[Impact]

CIFS team is requesting below patch to be backported for 5.4 Azure tuned kernel

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4e456b30f78c429b183db420e23b26cde7e03a78

A customer is encountering the bug fixed by this patch.

[Fix]

7d397a034d5c45528c7bdf7fc3752c4793029cce cifs: rename reconn_inval_dfs_target()
7d6535b720421d58886d5590ffc3617d359aa871 cifs: Simplify reconnect code when dfs upcall is enabled
4e456b30f78c429b183db420e23b26cde7e03a78 cifs: On cifs_reconnect, resolve the hostname again.

The first 2 patches are scaffolding to make the backport simpler. the 3rd patch is the bug fix.

[Test Plan]

The test kernel at https://launchpad.net/~timg-tpi/+archive/ubuntu/cifs-reconnect-sf00309672 has been found to fix the issue.

[Where problems could occur]

This could perturb CIFS connections in new and different ways.