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FreeBSD: Add support for lockless lookup

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Authored-by: mjg <mjg@FreeBSD.org>
Reviewed-by: Ryan Moeller <ryan@ixsystems.com>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #10657
This commit is contained in:
Matthew Macy
2020-08-05 10:19:51 -07:00
committed by GitHub
parent 22dcf89181
commit 1b376d176e
7 changed files with 176 additions and 12 deletions
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module/os/freebsd/spl/spl_vfs.c
+3
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@@ -161,6 +161,7 @@ mount_snapshot(kthread_t *td, vnode_t **vpp, const char *fstype, char *fspath,
vput(vp);
return (error);
}
vn_seqc_write_begin(vp);
VOP_UNLOCK1(vp);
/*
@@ -213,6 +214,7 @@ mount_snapshot(kthread_t *td, vnode_t **vpp, const char *fstype, char *fspath,
VI_LOCK(vp);
vp->v_iflag &= ~VI_MOUNT;
VI_UNLOCK(vp);
vn_seqc_write_end(vp);
vput(vp);
vfs_unbusy(mp);
vfs_freeopts(mp->mnt_optnew);
@@ -248,6 +250,7 @@ mount_snapshot(kthread_t *td, vnode_t **vpp, const char *fstype, char *fspath,
vfs_event_signal(NULL, VQ_MOUNT, 0);
if (VFS_ROOT(mp, LK_EXCLUSIVE, &mvp))
panic("mount: lost mount");
vn_seqc_write_end(vp);
VOP_UNLOCK1(vp);
#if __FreeBSD_version >= 1300048
vfs_op_exit(mp);