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FreeBSD: Lock vnode in zfs_ioctl() #16796

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FreeBSD: Lock vnode in zfs_ioctl() #16796

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@amotin amotin commented Nov 21, 2024

Previously vnode was not locked there, unlike Linux. It required locking it in vn_flush_cached_data(), which recursed on the lock if called from zfs_clone_range(), having the vnode locked.

Closes #16789

How Has This Been Tested?

Minimally. Run cp without block cloning and fsx from #16789.

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)
  • 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:

@amotin
FreeBSD: Lock vnode in zfs_ioctl()
fd602d3 
Previously vnode was not locked there, unlike Linux.  It required
locking it in vn_flush_cached_data(), which recursed on the lock
if called from zfs_clone_range(), having the vnode locked.

Signed-off-by:	Alexander Motin <[email protected]>
Sponsored by:	iXsystems, Inc.
Closes	openzfs#16789
This was referenced Nov 22, 2024
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@amotin amotin added the Status: Code Review Needed Ready for review and testing label Nov 22, 2024
asomers
asomers approved these changes Nov 22, 2024
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Looks good, and works too.

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@asomers asomers asomers approved these changes

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Successfully merging this pull request may close these issues.

panic: excl->share in zfs_clone_range when block_cloning is enabled
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