diff options
| -rw-r--r-- | fatcache.c | 20 |
1 files changed, 20 insertions, 0 deletions
@@ -357,6 +357,20 @@ re_calc: /*re-calc Numfree*/ boot->NumFree += (org_chain_len - fat->length); } + +/* + * This is a trade-off between time and memory + * In order to reduce the runtime memory consumption + * We change the whole strategy of cluster chain checking + * and managment. + * In some extreme cases, most of the clusters in FAT file + * system are discrete. that means it will take much time + * to manage memory and cluster chain at runtime. + * So set a limitation of max memory malloc here. + */ +int limit = 0; +#define FSCK_MSDOS_MAX_CALLOC_TIMES 0x15000 + struct cluster_chain_descriptor* New_fatentry(void) { struct cluster_chain_descriptor *fat; @@ -366,6 +380,9 @@ struct cluster_chain_descriptor* New_fatentry(void) return fat; } RB_SET(fat, NULL, rb); + if (++limit >= FSCK_MSDOS_MAX_CALLOC_TIMES) + exit(0); + return fat; } @@ -375,6 +392,9 @@ struct fatcache* New_fatcache(void) cache = calloc(1,sizeof(struct fatcache)); if(!cache) fsck_warn("No space \n"); + if (++limit >= FSCK_MSDOS_MAX_CALLOC_TIMES) + exit(0); + return cache; } |