4 #include <linux/types.h>
5 #include <linux/kernel.h>
6 #include <linux/bitops.h>
11 item_tag_set(struct radix_tree_root *root, unsigned long index, int tag)
13 return radix_tree_tag_set(root, index, tag);
17 item_tag_clear(struct radix_tree_root *root, unsigned long index, int tag)
19 return radix_tree_tag_clear(root, index, tag);
22 int item_tag_get(struct radix_tree_root *root, unsigned long index, int tag)
24 return radix_tree_tag_get(root, index, tag);
27 int __item_insert(struct radix_tree_root *root, struct item *item)
29 return __radix_tree_insert(root, item->index, item->order, item);
32 struct item *item_create(unsigned long index, unsigned int order)
34 struct item *ret = malloc(sizeof(*ret));
41 int item_insert_order(struct radix_tree_root *root, unsigned long index,
44 struct item *item = item_create(index, order);
45 int err = __item_insert(root, item);
51 int item_insert(struct radix_tree_root *root, unsigned long index)
53 return item_insert_order(root, index, 0);
56 void item_sanity(struct item *item, unsigned long index)
59 assert(!radix_tree_is_internal_node(item));
60 assert(item->order < BITS_PER_LONG);
61 mask = (1UL << item->order) - 1;
62 assert((item->index | mask) == (index | mask));
65 int item_delete(struct radix_tree_root *root, unsigned long index)
67 struct item *item = radix_tree_delete(root, index);
70 item_sanity(item, index);
77 void item_check_present(struct radix_tree_root *root, unsigned long index)
81 item = radix_tree_lookup(root, index);
83 item_sanity(item, index);
86 struct item *item_lookup(struct radix_tree_root *root, unsigned long index)
88 return radix_tree_lookup(root, index);
91 void item_check_absent(struct radix_tree_root *root, unsigned long index)
95 item = radix_tree_lookup(root, index);
100 * Scan only the passed (start, start+nr] for present items
102 void item_gang_check_present(struct radix_tree_root *root,
103 unsigned long start, unsigned long nr,
106 struct item *items[chunk];
109 for (into = 0; into < nr; ) {
111 int nr_to_find = chunk;
114 if (nr_to_find > (nr - into))
115 nr_to_find = nr - into;
117 nfound = radix_tree_gang_lookup(root, (void **)items,
118 start + into, nr_to_find);
119 assert(nfound == nr_to_find);
120 for (i = 0; i < nfound; i++)
121 assert(items[i]->index == start + into + i);
127 * Scan the entire tree, only expecting present items (start, start+nr]
129 void item_full_scan(struct radix_tree_root *root, unsigned long start,
130 unsigned long nr, int chunk)
132 struct item *items[chunk];
133 unsigned long into = 0;
134 unsigned long this_index = start;
138 // printf("%s(0x%08lx, 0x%08lx, %d)\n", __FUNCTION__, start, nr, chunk);
140 while ((nfound = radix_tree_gang_lookup(root, (void **)items, into,
142 // printf("At 0x%08lx, nfound=%d\n", into, nfound);
143 for (i = 0; i < nfound; i++) {
144 assert(items[i]->index == this_index);
147 // printf("Found 0x%08lx->0x%08lx\n",
148 // items[0]->index, items[nfound-1]->index);
152 assert(this_index == start + nr);
153 nfound = radix_tree_gang_lookup(root, (void **)items,
158 /* Use the same pattern as tag_pages_for_writeback() in mm/page-writeback.c */
159 int tag_tagged_items(struct radix_tree_root *root, pthread_mutex_t *lock,
160 unsigned long start, unsigned long end, unsigned batch,
161 unsigned iftag, unsigned thentag)
163 unsigned long tagged = 0;
164 struct radix_tree_iter iter;
171 pthread_mutex_lock(lock);
172 radix_tree_for_each_tagged(slot, root, &iter, start, iftag) {
173 if (iter.index > end)
175 radix_tree_iter_tag_set(root, &iter, thentag);
177 if ((tagged % batch) != 0)
179 slot = radix_tree_iter_resume(slot, &iter);
181 pthread_mutex_unlock(lock);
183 pthread_mutex_lock(lock);
187 pthread_mutex_unlock(lock);
192 /* Use the same pattern as find_swap_entry() in mm/shmem.c */
193 unsigned long find_item(struct radix_tree_root *root, void *item)
195 struct radix_tree_iter iter;
197 unsigned long found = -1;
198 unsigned long checked = 0;
200 radix_tree_for_each_slot(slot, root, &iter, 0) {
206 if ((checked % 4) != 0)
208 slot = radix_tree_iter_resume(slot, &iter);
214 static int verify_node(struct radix_tree_node *slot, unsigned int tag,
221 slot = entry_to_node(slot);
223 /* Verify consistency at this level */
224 for (i = 0; i < RADIX_TREE_TAG_LONGS; i++) {
225 if (slot->tags[tag][i]) {
230 if (tagged != anyset) {
231 printf("tag: %u, shift %u, tagged: %d, anyset: %d\n",
232 tag, slot->shift, tagged, anyset);
233 for (j = 0; j < RADIX_TREE_MAX_TAGS; j++) {
234 printf("tag %d: ", j);
235 for (i = 0; i < RADIX_TREE_TAG_LONGS; i++)
236 printf("%016lx ", slot->tags[j][i]);
241 assert(tagged == anyset);
243 /* Go for next level */
244 if (slot->shift > 0) {
245 for (i = 0; i < RADIX_TREE_MAP_SIZE; i++)
247 if (verify_node(slot->slots[i], tag,
248 !!test_bit(i, slot->tags[tag]))) {
249 printf("Failure at off %d\n", i);
250 for (j = 0; j < RADIX_TREE_MAX_TAGS; j++) {
251 printf("tag %d: ", j);
252 for (i = 0; i < RADIX_TREE_TAG_LONGS; i++)
253 printf("%016lx ", slot->tags[j][i]);
262 void verify_tag_consistency(struct radix_tree_root *root, unsigned int tag)
264 struct radix_tree_node *node = root->rnode;
265 if (!radix_tree_is_internal_node(node))
267 verify_node(node, tag, !!root_tag_get(root, tag));
270 void item_kill_tree(struct radix_tree_root *root)
272 struct radix_tree_iter iter;
274 struct item *items[32];
277 radix_tree_for_each_slot(slot, root, &iter, 0) {
278 if (radix_tree_exceptional_entry(*slot))
279 radix_tree_delete(root, iter.index);
282 while ((nfound = radix_tree_gang_lookup(root, (void **)items, 0, 32))) {
285 for (i = 0; i < nfound; i++) {
288 ret = radix_tree_delete(root, items[i]->index);
289 assert(ret == items[i]);
293 assert(radix_tree_gang_lookup(root, (void **)items, 0, 32) == 0);
294 assert(root->rnode == NULL);
297 void tree_verify_min_height(struct radix_tree_root *root, int maxindex)
300 struct radix_tree_node *node = root->rnode;
301 if (!radix_tree_is_internal_node(node)) {
302 assert(maxindex == 0);
306 node = entry_to_node(node);
307 assert(maxindex <= node_maxindex(node));
311 assert(maxindex > shift_maxindex(shift - RADIX_TREE_MAP_SHIFT));
313 assert(maxindex > 0);