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Linux/vnops: implement STATX_DIOALIGN

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This statx(2) mask returns the alignment restrictions for O_DIRECT
access on the given file.

We're expected to return both memory and IO alignment. For memory, it's
always PAGE_SIZE. For IO, we return the current block size for the file,
which is the required alignment for an arbitrary block, and for the
first block we'll fall back to the ARC when necessary, so it should
always work.

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #16972
This commit is contained in:
Rob Norris
2025-03-14 04:15:14 +11:00
committed by GitHub
parent 0433523ca2
commit 13ec35ce3b
11 changed files with 548 additions and 2 deletions
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tests/zfs-tests/cmd/Makefile.am
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@@ -126,6 +126,7 @@ if BUILD_LINUX
scripts_zfs_tests_bin_PROGRAMS += %D%/getversion
scripts_zfs_tests_bin_PROGRAMS += %D%/user_ns_exec
scripts_zfs_tests_bin_PROGRAMS += %D%/renameat2
scripts_zfs_tests_bin_PROGRAMS += %D%/statx
scripts_zfs_tests_bin_PROGRAMS += %D%/xattrtest
scripts_zfs_tests_bin_PROGRAMS += %D%/zed_fd_spill-zedlet
scripts_zfs_tests_bin_PROGRAMS += %D%/idmap_util