[backport] Kernel 5.12 compat patches for 2.0.* #12009
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In Linux 5.12, the filesystem API was modified to support ipmapped mounts by adding a "struct user_namespace *" parameter to a number functions and VFS handlers. This change adds the needed autoconf macros to detect the new interfaces and updates the code appropriately. This change does not add support for idmapped mounts, instead it preserves the existing behavior by passing the initial user namespace where needed. A subsequent commit will be required to add support for idmapped mounted. Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Co-authored-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Coleman Kane <ckane@colemankane.org> Closes #11712 (cherry picked from commit e2a8296) Signed-off-by: Jonathon Fernyhough <jonathon@m2x.dev>
The BIO_MAX_PAGES macro is being retired in favor of a bio_max_segs() function that implements the typical MIN(x,y) logic used throughout the kernel for bounding the allocation, and also the new implementation is intended to be signed-safe (which the former was not). Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Coleman Kane <ckane@colemankane.org> Closes #11765 (cherry picked from commit ffd6978) Signed-off-by: Jonathon Fernyhough <jonathon@m2x.dev>
tonyhutter
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May 7, 2021
behlendorf
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May 7, 2021
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This was referenced May 28, 2021
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Sep 10, 2021
Backport kernel 5.12 compat and update patches This backports the upstream compat patches openzfs/zfs@e2a8296 and openzfs/zfs@ffd6978 via openzfs/zfs#12009 Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
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Motivation and Context
This PR backports two additional compat patches necessary for kernel 5.12 support for the 2.0.* series.
Description
This cherry-picks both e2a8296 and ffd6978 for kernel 5.12 compatibility.
How Has This Been Tested?
This has been tested on several systems running Arch Linux and kernels 5.12.0 and 5.12.1 using the PR eli-schwartz/pkgbuilds#24 (which will be updated pending this PR).
Types of changes
Checklist:
Signed-off-by.