Changes in uspace/srv/fs/exfat/exfat_ops.c [062d900:6b6f394d] in mainline

File:

• uspace/srv/fs/exfat/exfat_ops.c (modified) (3 diffs)

uspace/srv/fs/exfat/exfat_ops.c

@@ -89 +89 @@
 static bool exfat_is_file(fs_node_t *node);
 static service_id_t exfat_service_get(fs_node_t *node);
+static int exfat_size_block(service_id_t, uint32_t *);
+static int exfat_total_block_count(service_id_t, uint64_t *);
+static int exfat_free_block_count(service_id_t, uint64_t *);
 
 /*
@@ -912 +915 @@
 }
 
+int exfat_size_block(service_id_t service_id, uint32_t *size)
+{
+        exfat_bs_t *bs;
+        bs = block_bb_get(service_id);
+        *size = BPC(bs);
+
+        return EOK;
+}
+
+int exfat_total_block_count(service_id_t service_id, uint64_t *count)
+{
+        exfat_bs_t *bs;
+        bs = block_bb_get(service_id);
+        *count = DATA_CNT(bs);
+        
+        return EOK;
+}
+
+int exfat_free_block_count(service_id_t service_id, uint64_t *count)
+{
+        fs_node_t *node;
+        exfat_node_t *bmap_node;
+        exfat_bs_t *bs;
+        uint64_t free_block_count = 0;
+        uint64_t block_count;
+        unsigned sector;
+        int rc;
+
+        rc = exfat_total_block_count(service_id, &block_count);
+        if (rc != EOK)
+                goto exit;
+
+        bs = block_bb_get(service_id);
+        node = NULL;
+        rc = exfat_bitmap_get(&node, service_id);
+        if (rc != EOK)
+                goto exit;
+
+        bmap_node = (exfat_node_t *) node->data;
+
+        unsigned const bmap_sectors = ROUND_UP(bmap_node->size, BPS(bs)) /
+            BPS(bs);
+
+        for (sector = 0; sector < bmap_sectors; ++sector) {
+
+                block_t *block;
+                uint8_t *bitmap;
+                unsigned bit;
+
+                rc = exfat_block_get(&block, bs, bmap_node, sector,
+                    BLOCK_FLAGS_NONE);
+                if (rc != EOK) {
+                        free_block_count = 0;
+                        goto exit;
+                }
+
+                bitmap = (uint8_t *) block->data;
+
+                for (bit = 0; bit < BPS(bs) * 8 && block_count > 0;
+                    ++bit, --block_count) {
+                        if (!(bitmap[bit / 8] & (1 << (bit % 8))))
+                                ++free_block_count;
+                }
+
+                block_put(block);
+
+                if (block_count == 0) {
+                        /* Reached the end of the bitmap */
+                        goto exit;
+                }
+        }
+
+exit:
+        exfat_node_put(node);
+        *count = free_block_count;
+        return rc;
+}
 
 /** libfs operations */
@@ -930 +1010 @@
         .is_directory = exfat_is_directory,
         .is_file = exfat_is_file,
-        .service_get = exfat_service_get
+        .service_get = exfat_service_get,
+        .size_block = exfat_size_block,
+        .total_block_count = exfat_total_block_count,
+        .free_block_count = exfat_free_block_count
 };