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FreeBSD: try to fallback early if can't do optimized copy

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Not complete, but already shaves on some locking.

Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Sponsored by:	Rubicon Communications, LLC ("Netgate")
Closes #14723
This commit is contained in:
Mateusz Guzik 2023-04-05 21:28:52 +00:00 committed by Brian Behlendorf
parent a7982d5d30
commit ff0e135e25
1 changed files with 8 additions and 0 deletions
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8
module/os/freebsd/zfs/zfs_vnops_os.c
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@ -6235,6 +6235,7 @@ struct vop_copy_file_range_args {
static int
zfs_freebsd_copy_file_range(struct vop_copy_file_range_args *ap)
{
zfsvfs_t *outzfsvfs;
struct vnode *invp = ap->a_invp;
struct vnode *outvp = ap->a_outvp;
struct mount *mp;
@ -6250,6 +6251,13 @@ zfs_freebsd_copy_file_range(struct vop_copy_file_range_args *ap)
*/
vn_start_write(outvp, &mp, V_WAIT);
if (__predict_true(mp == outvp->v_mount)) {
outzfsvfs = (zfsvfs_t *)mp->mnt_data;
if (!spa_feature_is_enabled(dmu_objset_spa(outzfsvfs->z_os),
SPA_FEATURE_BLOCK_CLONING)) {
goto bad_write_fallback;
}
}
if (invp == outvp) {
if (vn_lock(outvp, LK_EXCLUSIVE) != 0) {
goto bad_write_fallback;