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FreeBSD: Implement hole-punching support

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This adds supports for hole-punching facilities in the FreeBSD kernel
starting from __FreeBSD_version 1400032.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Ka Ho Ng <khng@FreeBSD.org>
Sponsored-by: The FreeBSD Foundation
Closes #12458
This commit is contained in:
Ka Ho Ng
2021-08-04 23:57:48 +08:00
committed by Brian Behlendorf
parent 70bf547a98
commit f3bbeb970e
2 changed files with 64 additions and 3 deletions
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module/os/freebsd/zfs/zfs_znode.c
+7 -3
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@@ -1476,12 +1476,16 @@ zfs_free_range(znode_t *zp, uint64_t off, uint64_t len)
error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, off, len);
if (error == 0) {
#if __FreeBSD_version >= 1400032
vnode_pager_purge_range(ZTOV(zp), off, off + len);
#else
/*
* In FreeBSD we cannot free block in the middle of a file,
* but only at the end of a file, so this code path should
* never happen.
* Before __FreeBSD_version 1400032 we cannot free block in the
* middle of a file, but only at the end of a file, so this code
* path should never happen.
*/
vnode_pager_setsize(ZTOV(zp), off);
#endif
}
zfs_rangelock_exit(lr);