Changeset da34d61d in mainline for uspace/app/mkexfat/mkexfat.c

Timestamp:

2012-02-25T14:53:21Z (12 years ago)

Author:

Maurizio Lombardi <m.lombardi85@…>

Branches:

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

Children:

ff415f62

Parents:

392bd67c

Message:

mkexfat: Write the root directory entries to disk.

File:

• uspace/app/mkexfat/mkexfat.c (modified) (8 diffs)

uspace/app/mkexfat/mkexfat.c

@@ -47 +47 @@
 #include <sys/typefmt.h>
 #include <bool.h>
+#include <str.h>
 #include "exfat.h"
 #include "upcase.h"
@@ -88 +89 @@
         unsigned long rootdir_cluster;
         unsigned long upcase_table_cluster;
+        unsigned long bitmap_cluster;
         unsigned long total_clusters;
         unsigned long allocated_clusters;
@@ -111 +113 @@
 bitmap_write(service_id_t service_id, exfat_cfg_t *cfg);
 
+static uint32_t
+upcase_table_checksum(void const *data, size_t nbytes);
+
 static void usage(void)
 {
@@ -168 +173 @@
         /* Will be set later */
         cfg->rootdir_cluster = 0;
+
+        /* Bitmap always starts at the first free cluster */
+        cfg->bitmap_cluster = FIRST_FREE_CLUSTER;
 
         /* The first sector of the partition is zero */
@@ -524 +532 @@
 }
 
+/** Initialize and write the root directory entries to disk.
+ *
+ * @param service_id   The service id.
+ * @param cfg   Pointer to the exFAT configuration structure.
+ * @return   EOK on success or a negative error code.
+ */
+static int
+root_dentries_write(service_id_t service_id, exfat_cfg_t *cfg)
+{
+        exfat_dentry_t *d;
+        aoff64_t rootdir_sec;
+        int rc;
+        uint8_t *data;
+
+        data = calloc(cfg->sector_size, 1);
+        if (!data)
+                return ENOMEM;
+
+        d = (exfat_dentry_t *) data;
+
+        /* Initialize the volume label dentry */
+        d->type = EXFAT_TYPE_VOLLABEL;
+        str_to_utf16(d->vollabel.label, 7, "HELENOS");
+        d->vollabel.size = 7;
+
+        d++;
+
+        /* Initialize the allocation bitmap dentry */
+        d->type = EXFAT_TYPE_BITMAP;
+        d->bitmap.flags = 0; /* First FAT */
+        d->bitmap.firstc = host2uint32_t_le(cfg->bitmap_cluster);
+        d->bitmap.size = host2uint64_t_le(cfg->bitmap_size);
+
+        d++;
+
+        /* Initialize the upcase table dentry */
+        d->type = EXFAT_TYPE_UCTABLE;
+        d->uctable.checksum = host2uint32_t_le(upcase_table_checksum(
+            upcase_table, sizeof(upcase_table)));
+        d->uctable.firstc = host2uint32_t_le(cfg->upcase_table_cluster);
+        d->uctable.size = host2uint64_t_le(sizeof(upcase_table));
+
+        /* Compute the number of the sector where the rootdir resides */
+
+        rootdir_sec = cfg->data_start_sector;
+        rootdir_sec += ((cfg->rootdir_cluster - 2) * cfg->cluster_size) /
+            cfg->sector_size;
+
+        rc = block_write_direct(service_id, rootdir_sec, 1, data);
+
+        free(data);
+        return rc;
+}
+
 /** Given a number (n), returns the result of log2(n).
  *
@@ -655 +717 @@
 
         /* Allocate clusters for the bitmap */
-        rc = fat_allocate_clusters(service_id, &cfg, FIRST_FREE_CLUSTER,
+        rc = fat_allocate_clusters(service_id, &cfg, cfg.bitmap_cluster,
             div_round_up(cfg.bitmap_size, cfg.cluster_size));
         if (rc != EOK) {
@@ -662 +724 @@
         }
 
-        next_cls = FIRST_FREE_CLUSTER +
+        next_cls = cfg.bitmap_cluster +
             div_round_up(cfg.bitmap_size, cfg.cluster_size);
         cfg.upcase_table_cluster = next_cls;
@@ -699 +761 @@
         }
 
+        rc = root_dentries_write(service_id, &cfg);
+        if (rc != EOK) {
+                printf(NAME ": Error, failed to write the root directory" \
+                    " entries to disk.\n");
+                return 2;
+        }
+
         rc = bootsec_write(service_id, &cfg);
         if (rc != EOK) {