Lines Matching full:refcount
22 * reference counts. Once the refcount has dropped to zero, it is
38 void ea_refcount_free(ext2_refcount_t refcount)
40 if (!refcount)
43 if (refcount->list)
44 ext2fs_free_mem(&refcount->list);
45 ext2fs_free_mem(&refcount);
50 ext2_refcount_t refcount;
54 retval = ext2fs_get_mem(sizeof(struct ea_refcount), &refcount);
57 memset(refcount, 0, sizeof(struct ea_refcount));
61 refcount->size = size;
64 printf("Refcount allocated %d entries, %d bytes.\n",
65 refcount->size, bytes);
67 retval = ext2fs_get_mem(bytes, &refcount->list);
70 memset(refcount->list, 0, bytes);
72 refcount->count = 0;
73 refcount->cursor = 0;
75 *ret = refcount;
79 ea_refcount_free(refcount);
84 * collapse_refcount() --- go through the refcount array, and get rid
87 static void refcount_collapse(ext2_refcount_t refcount)
92 list = refcount->list;
93 for (i = 0, j = 0; i < refcount->count; i++) {
102 refcount->count, j);
104 refcount->count = j;
112 static struct ea_refcount_el *insert_refcount_el(ext2_refcount_t refcount,
120 if (refcount->count >= refcount->size) {
121 new_size = refcount->size + 100;
123 printf("Reallocating refcount %d entries...\n", new_size);
125 retval = ext2fs_resize_mem((size_t) refcount->size *
129 &refcount->list);
132 refcount->size = new_size;
134 num = (int) refcount->count - pos;
138 memmove(&refcount->list[pos+1], &refcount->list[pos],
141 refcount->count++;
142 el = &refcount->list[pos];
150 * get_refcount_el() --- given an block number, try to find refcount
154 static struct ea_refcount_el *get_refcount_el(ext2_refcount_t refcount,
159 if (!refcount || !refcount->list)
163 high = (int) refcount->count-1;
164 if (create && ((refcount->count == 0) ||
165 (blk > refcount->list[high].ea_blk))) {
166 if (refcount->count >= refcount->size)
167 refcount_collapse(refcount);
169 return insert_refcount_el(refcount, blk,
170 (unsigned) refcount->count);
172 if (refcount->count == 0)
175 if (refcount->cursor >= refcount->count)
176 refcount->cursor = 0;
177 if (blk == refcount->list[refcount->cursor].ea_blk)
178 return &refcount->list[refcount->cursor++];
184 if (blk == refcount->list[mid].ea_blk) {
185 refcount->cursor = mid+1;
186 return &refcount->list[mid];
188 if (blk < refcount->list[mid].ea_blk)
198 if (refcount->count >= refcount->size) {
199 refcount_collapse(refcount);
200 if (refcount->count < refcount->size)
203 return insert_refcount_el(refcount, blk, low);
208 errcode_t ea_refcount_fetch(ext2_refcount_t refcount, blk64_t blk,
213 el = get_refcount_el(refcount, blk, 0);
222 errcode_t ea_refcount_increment(ext2_refcount_t refcount, blk64_t blk, int *ret)
226 el = get_refcount_el(refcount, blk, 1);
236 errcode_t ea_refcount_decrement(ext2_refcount_t refcount, blk64_t blk, int *ret)
240 el = get_refcount_el(refcount, blk, 0);
251 errcode_t ea_refcount_store(ext2_refcount_t refcount, blk64_t blk, int count)
256 * Get the refcount element
258 el = get_refcount_el(refcount, blk, count ? 1 : 0);
265 blk_t ext2fs_get_refcount_size(ext2_refcount_t refcount)
267 if (!refcount)
270 return refcount->size;
273 void ea_refcount_intr_begin(ext2_refcount_t refcount)
275 refcount->cursor = 0;
279 blk64_t ea_refcount_intr_next(ext2_refcount_t refcount,
285 if (refcount->cursor >= refcount->count)
287 list = refcount->list;
288 if (list[refcount->cursor].ea_count) {
290 *ret = list[refcount->cursor].ea_count;
291 return list[refcount->cursor++].ea_blk;
293 refcount->cursor++;
300 errcode_t ea_refcount_validate(ext2_refcount_t refcount, FILE *out)
304 const char *bad = "bad refcount";
306 if (refcount->count > refcount->size) {
310 for (i=1; i < refcount->count; i++) {
311 if (refcount->list[i-1].ea_blk >= refcount->list[i].ea_blk) {
314 bad, i-1, refcount->list[i-1].ea_blk,
315 i, refcount->list[i].ea_blk);
371 ext2_refcount_t refcount;
382 retval = ea_refcount_create(size, &refcount);
388 printf("Creating refcount with size %d\n",
392 ea_refcount_free(refcount);
393 refcount = 0;
394 printf("Freeing refcount\n");
400 retval = ea_refcount_store(refcount, blk, arg);
407 retval = ea_refcount_fetch(refcount, blk, &arg);
417 retval = ea_refcount_increment(refcount, blk, &arg);
427 retval = ea_refcount_decrement(refcount, blk, &arg);
436 retval = ea_refcount_validate(refcount, stderr);
441 printf("Refcount validation OK.\n");
444 ea_refcount_intr_begin(refcount);
446 blk = ea_refcount_intr_next(refcount, &arg);
453 refcount_collapse(refcount);
