diff options
Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/radix-tree.h')
| -rw-r--r-- | sys/compat/linuxkpi/common/include/linux/radix-tree.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/radix-tree.h b/sys/compat/linuxkpi/common/include/linux/radix-tree.h new file mode 100644 index 0000000..838b81c --- /dev/null +++ b/sys/compat/linuxkpi/common/include/linux/radix-tree.h @@ -0,0 +1,62 @@ +/*- + * Copyright (c) 2010 Isilon Systems, Inc. + * Copyright (c) 2010 iX Systems, Inc. + * Copyright (c) 2010 Panasas, Inc. + * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice unmodified, this list of conditions, and the following + * disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $FreeBSD$ + */ +#ifndef _LINUX_RADIX_TREE_H_ +#define _LINUX_RADIX_TREE_H_ + +#define RADIX_TREE_MAP_SHIFT 6 +#define RADIX_TREE_MAP_SIZE (1 << RADIX_TREE_MAP_SHIFT) +#define RADIX_TREE_MAP_MASK (RADIX_TREE_MAP_SIZE - 1) +#define RADIX_TREE_MAX_HEIGHT \ + DIV_ROUND_UP((sizeof(long) * NBBY), RADIX_TREE_MAP_SHIFT) + +struct radix_tree_node { + void *slots[RADIX_TREE_MAP_SIZE]; + int count; +}; + +struct radix_tree_root { + struct radix_tree_node *rnode; + gfp_t gfp_mask; + int height; +}; + +#define RADIX_TREE_INIT(mask) \ + { .rnode = NULL, .gfp_mask = mask, .height = 0 }; +#define INIT_RADIX_TREE(root, mask) \ + { (root)->rnode = NULL; (root)->gfp_mask = mask; (root)->height = 0; } +#define RADIX_TREE(name, mask) \ + struct radix_tree_root name = RADIX_TREE_INIT(mask) + +void *radix_tree_lookup(struct radix_tree_root *, unsigned long); +void *radix_tree_delete(struct radix_tree_root *, unsigned long); +int radix_tree_insert(struct radix_tree_root *, unsigned long, void *); + +#endif /* _LINUX_RADIX_TREE_H_ */ |
