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Support idmapped mount in user namespace

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Linux 5.17 commit torvalds/linux@5dfbfe71e enables "the idmapping 
infrastructure to support idmapped mounts of filesystems mounted 
with an idmapping". Update the OpenZFS accordingly to improve the 
idmapped mount support. 

This pull request contains the following changes:

- xattr setter functions are fixed to take mnt_ns argument. Without
  this, cp -p would fail for an idmapped mount in a user namespace.
- idmap_util is enhanced/fixed for its use in a user ns context.
- One test case added to test idmapped mount in a user ns.

Reviewed-by: Christian Brauner <christian@brauner.io>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Youzhong Yang <yyang@mathworks.com>
Closes #14097
This commit is contained in:
youzhongyang
2022-11-08 13:28:56 -05:00
committed by GitHub
parent 109731cd73
commit f224eddf92
21 changed files with 424 additions and 96 deletions
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tests/test-runner/bin/zts-report.py.in
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@@ -284,6 +284,7 @@ elif sys.platform.startswith('linux'):
'idmap_mount/idmap_mount_002': ['SKIP', idmap_reason],
'idmap_mount/idmap_mount_003': ['SKIP', idmap_reason],
'idmap_mount/idmap_mount_004': ['SKIP', idmap_reason],
'idmap_mount/idmap_mount_005': ['SKIP', idmap_reason],
})