Changeset 0d110908 in mainline

Timestamp:

2013-07-22T21:48:09Z (12 years ago)

Author:

Manuele Conti <conti.ma@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

675a2bb

Parents:

17a0fb8

Message:

Start to implement free block count operation for FAT fs.

File:

• uspace/srv/fs/fat/fat_ops.c (modified) (3 diffs)

uspace/srv/fs/fat/fat_ops.c

@@ -93 +93 @@
 static uint32_t fat_size_block(service_id_t);
 static uint64_t fat_total_block_count(service_id_t);
+static uint64_t fat_free_block_count(service_id_t);
 
 /*
@@ -863 +864 @@
 }
 
+uint64_t fat_free_block_count(service_id_t service_id)
+{
+        fat_bs_t *bs;
+        fat_cluster_t e0 = 0;
+        uint64_t block_count;
+        int rc;
+        uint32_t fat_no, fat_tot;
+
+        block_count = 0;
+        bs = block_bb_get(service_id);
+        
+        fat_tot = (SPC(bs)) ? TS(bs) / SPC(bs) : 0;
+        
+        for (fat_no = 0; fat_no < fat_tot; fat_no++) {
+                rc = fat_get_cluster(bs, service_id, FAT1, e0, &e0);
+                if (rc != EOK)
+                        return EIO;
+
+                if (e0 == FAT_CLST_RES0)
+                        block_count++;
+        }
+
+        return block_count;
+}
+
 /** libfs operations */
 libfs_ops_t fat_libfs_ops = {
@@ -882 +908 @@
         .service_get = fat_service_get,
         .size_block = fat_size_block,
-        .total_block_count = fat_total_block_count
+        .total_block_count = fat_total_block_count,
+        .free_block_count = fat_free_block_count
 };