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Linux 6.17 compat #17621

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Linux 6.17 compat #17621

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@robn robn commented Aug 12, 2025 •
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Motivation and Context

And Yertle the Turtle, the king of the trees,
The king of the air and the birds and the bees,
The king of a house and a cow and a mule . . .
Well, that was the end of the Turtle King’s rule!
For Yertle, the King of all Sala-ma-Sond,
Fell off his high throne and fell Plunk! in the pond!

– Yertle the Turtle, Dr. Seuss, 1958.

16.7-rc1 is here; lets make sure there's a fancy filesystem to go with it.

Description

Only one change so far:

  • d_set_d_op() is no longer available, so replace it with just enough to swap in dentry ops in the snapdir automounter.

More might be needed, in particular, the change from mmap to mmap_prepare in struct file_operations. However, this a deprecation, not a removal, so it can possibly wait.

How Has This Been Tested?

ZTS run passed on 16.7-rc1, -rc2, -rc3.

Types of changes

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Performance enhancement (non-breaking change which improves efficiency)
  • Code cleanup (non-breaking change which makes code smaller or more readable)
  • Quality assurance (non-breaking change which makes the code more robust against bugs)
  • Breaking change (fix or feature that would cause existing functionality to change)
  • Library ABI change (libzfs, libzfs_core, libnvpair, libuutil and libzfsbootenv)
  • Documentation (a change to man pages or other documentation)

Checklist:

@hphilm hphilm mentioned this pull request Aug 12, 2025
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@amotin amotin added the Status: Code Review Needed Ready for review and testing label Aug 12, 2025
This was referenced Aug 13, 2025
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@robn robn force-pushed the linux-6.17-compat branch from bcceb48 to e89e773 Compare August 20, 2025 02:15
robn added 2 commits August 25, 2025 09:12
@robn
config: restore ZFS_AC_KERNEL_DENTRY tests
5a1981a 
Accidentally removed calls in ed048fd.

Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <[email protected]>
@robn
Linux 6.17: d_set_d_op() is no longer available
9b83cfc 
We only have extremely narrow uses, so move it all into a single
function that does only what we need, with and without d_set_d_op().

Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <[email protected]>
@robn robn force-pushed the linux-6.17-compat branch from e89e773 to 9b83cfc Compare August 25, 2025 11:06
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@tonyhutter tonyhutter tonyhutter approved these changes

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@robn @tonyhutter @amotin