Changeset fb04cd90 in mainline for uspace/lib/ext4/libext4_superblock.c

Timestamp:

2012-05-28T09:56:44Z (12 years ago)

Author:

Frantisek Princ <frantisek.princ@…>

Branches:

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

Children:

4585bda

Parents:

d0c9b4b

Message:

checks by mount operation

File:

• uspace/lib/ext4/libext4_superblock.c (modified) (5 diffs)

uspace/lib/ext4/libext4_superblock.c

@@ -217 +217 @@
 }
 
+/** Get logarithmic fragment size (1024 << size)
+ *
+ * @param sb            superblock
+ * @return                      logarithmic fragment size
+ */
+uint32_t ext4_superblock_get_log_frag_size(ext4_superblock_t *sb)
+{
+        return uint32_t_le2host(sb->log_frag_size);
+}
+
+/** Set logarithmic fragment size (1024 << size)
+ *
+ * @param sb            superblock
+ * @return                      logarithmic fragment size
+ */
+
+void ext4_superblock_set_log_frag_size(ext4_superblock_t *sb, uint32_t frag_size)
+{
+        sb->log_frag_size = host2uint32_t_le(frag_size);
+}
+
+/** Get size of fragment (in bytes).
+ *
+ * @param sb            superblock
+ * @return                      size of fragment
+ */
+uint32_t ext4_superblock_get_frag_size(ext4_superblock_t *sb)
+{
+        return 1024 << ext4_superblock_get_log_frag_size(sb);
+}
+
+/** Set size of fragment (in bytes).
+ *
+ * @param sb            superblock
+ * @param size          size of fragment (must be power of 2, at least 1024)
+ */
+void ext4_superblock_set_frag_size(ext4_superblock_t *sb, uint32_t size)
+{
+        uint32_t log = 0;
+        uint32_t tmp = size / EXT4_MIN_BLOCK_SIZE;
+
+        tmp >>= 1;
+        while (tmp) {
+                log++;
+                tmp >>= 1;
+        }
+
+        ext4_superblock_set_log_frag_size(sb, log);
+}
+
 /** Get number of data blocks per block group (except last BG)
  *
@@ -236 +286 @@
         sb->blocks_per_group = host2uint32_t_le(blocks);
 }
+
+/** Get number of fragments per block group (except last BG)
+ *
+ * @param sb            superblock
+ * @return                      fragments per block group
+ */
+uint32_t ext4_superblock_get_frags_per_group(ext4_superblock_t *sb)
+{
+        return uint32_t_le2host(sb->frags_per_group);
+}
+
+/** Set number of fragment per block group (except last BG)
+ *
+ * @param sb            superblock
+ * @param frags         fragments per block group
+ */
+void ext4_superblock_set_frags_per_group(ext4_superblock_t *sb, uint32_t frags)
+{
+        sb->frags_per_group = host2uint32_t_le(frags);
+}
+
 
 /** Get number of i-nodes per block group (except last BG)
@@ -796 +867 @@
         uint16_t size = uint16_t_le2host(sb->desc_size);
 
-        if (size < EXT4_BLOCK_MIN_GROUP_DESCRIPTOR_SIZE) {
-                size = EXT4_BLOCK_MIN_GROUP_DESCRIPTOR_SIZE;
+        if (size < EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE) {
+                size = EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE;
         }
 
@@ -812 +883 @@
 void ext4_superblock_set_desc_size(ext4_superblock_t *sb, uint16_t size)
 {
-        if (size < EXT4_BLOCK_MIN_GROUP_DESCRIPTOR_SIZE) {
-                sb->desc_size = host2uint16_t_le(EXT4_BLOCK_MIN_GROUP_DESCRIPTOR_SIZE);
+        if (size < EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE) {
+                sb->desc_size = host2uint16_t_le(EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE);
         }
 
@@ -978 +1049 @@
         }
 
-        // block size
-        // desc size
-
+        if (ext4_superblock_get_inodes_count(sb) == 0) {
+                return ENOTSUP;
+        }
+
+        if (ext4_superblock_get_blocks_count(sb) == 0) {
+                return ENOTSUP;
+        }
+
+        if (ext4_superblock_get_blocks_per_group(sb) == 0) {
+                return ENOTSUP;
+        }
+
+        if (ext4_superblock_get_inodes_per_group(sb) == 0) {
+                return ENOTSUP;
+        }
+
+        if (ext4_superblock_get_inode_size(sb) < 128) {
+                return ENOTSUP;
+        }
+
+        if (ext4_superblock_get_first_inode(sb) < 11) {
+                return ENOTSUP;
+        }
+
+        if (ext4_superblock_get_desc_size(sb) < EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE) {
+                return ENOTSUP;
+        }
+
+        if (ext4_superblock_get_desc_size(sb) > EXT4_MAX_BLOCK_GROUP_DESCRIPTOR_SIZE) {
+                return ENOTSUP;
+        }
 
         // TODO more checks !!!