Changeset 245b7945 in mainline for uspace/srv/fs/exfat/exfat_fat.c

Timestamp:

2011-08-14T08:22:25Z (13 years ago)

Author:

Oleg Romanenko <romanenko.oleg@…>

Branches:

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

Children:

5f0e16e4

Parents:

a18bd22

Message:

exFAT: implement bitmap_set_clusters, bitmap_clear_clusters,
bitmap_free_clusters

File:

• uspace/srv/fs/exfat/exfat_fat.c (modified) (2 diffs)

uspace/srv/fs/exfat/exfat_fat.c

@@ -483 +483 @@
 }
 
+int bitmap_set_cluster(exfat_bs_t *bs, devmap_handle_t devmap_handle, 
+    exfat_cluster_t firstc)
+{
+        /* TODO */
+        return EOK;
+}
+
+int bitmap_clear_cluster(exfat_bs_t *bs, devmap_handle_t devmap_handle, 
+    exfat_cluster_t firstc)
+{
+        /* TODO */
+        return EOK;
+}
+
 int bitmap_set_clusters(exfat_bs_t *bs, devmap_handle_t devmap_handle, 
     exfat_cluster_t firstc, exfat_cluster_t count)
 {
-        /* TODO */
-        return EOK;
-}
-
+        int rc;
+        exfat_cluster_t clst;
+        clst = firstc;
+
+        while (clst < firstc+count ) {
+                rc = bitmap_set_cluster(bs, devmap_handle, clst);
+                if (rc != EOK) {
+                        if ((clst-firstc) > 0)
+                                (void) bitmap_clear_clusters(bs, devmap_handle, firstc, clst-firstc);
+                        return rc;
+                }
+                clst++;
+        }
+        return EOK;
+}
+
+int bitmap_clear_clusters(exfat_bs_t *bs, devmap_handle_t devmap_handle, 
+    exfat_cluster_t firstc, exfat_cluster_t count)
+{
+        int rc;
+        exfat_cluster_t clst;
+        clst = firstc;
+
+        while (clst < firstc+count ) {
+                rc = bitmap_clear_cluster(bs, devmap_handle, clst);
+                if (rc != EOK)
+                        return rc;
+                clst++;
+        }
+        return EOK;
+}
 
 int bitmap_alloc_clusters(exfat_bs_t *bs, devmap_handle_t devmap_handle, 
@@ -544 +585 @@
     exfat_cluster_t count)
 {
-        /* TODO */
-        return EOK;
+        exfat_cluster_t lastc;
+        lastc = nodep->firstc + ROUND_UP(nodep->size, BPC(bs)) / BPC(bs) - 1;
+        lastc -= count;
+
+        return bitmap_clear_clusters(bs, nodep->idx->devmap_handle, lastc+1, count);
 }