Changeset 63ffffd in mainline

Timestamp:

2011-03-04T18:53:02Z (13 years ago)

Author:

Maurizio Lombardi <m.lombardi85@…>

Branches:

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

Children:

1ffbbc1

Parents:

7413683

Message:

MFSv3 superblock structure is different than V1/V2 superblock

Location:

uspace/srv/fs/minixfs

Files:

• mfs_super.c (modified) (1 diff)
• mfs_super.h (modified) (2 diffs)

uspace/srv/fs/minixfs/mfs_super.c

@@ -47 +47 @@
         devmap_handle_t devmap_handle = (devmap_handle_t) IPC_GET_ARG1(*request);
         enum cache_mode cmode;  
-        struct mfs_superblock *sp;
+        struct mfs3_superblock *sp;
         bool native;
         mfs_version_t version;

uspace/srv/fs/minixfs/mfs_super.h

@@ -45 +45 @@
 #define MFS_MAGIC_V3R           0x5A4D
 
-/*V3 superblock data on disk*/
+/*MFS V1/V2 superblock data on disk*/
 struct mfs_superblock {
         /*Total number of inodes on the device*/
+        uint16_t        s_ninodes;
+        /*Total number of zones on the device*/
+        uint16_t        s_nzones;
+        /*Number of inode bitmap blocks*/
+        uint16_t        s_ibmap_blocks;
+        /*Number of zone bitmap blocks*/
+        uint16_t        s_zbmap_blocks;
+        /*First data zone on device*/
+        uint16_t        s_first_data_zone;
+        /*Base 2 logarithm of the zone to block ratio*/
+        uint16_t        s_log2_zone_size;
+        /*Maximum file size expressed in bytes*/
+        uint32_t        s_max_file_size;
+        /*
+         *Magic number used to recognize MinixFS
+         *and to detect on-disk endianness
+         */
+        uint16_t        s_magic;
+        /*Flag used to detect FS errors*/
+        uint16_t        s_state;
+        /*Total number of zones on the device (V2 only)*/
+        uint32_t        s_nzones2;
+} __attribute__ ((packed));
+
+
+/*MFS V3 superblock data on disk*/
+struct mfs3_superblock {
+        /*Total number of inodes on the device*/
         uint32_t        s_ninodes;
-        /*Device size expressed as number of zones (unused)*/
-        uint16_t        s_nzones;
         /*Number of inode bitmap blocks*/
         int16_t         s_ibmap_blocks;
@@ -64 +90 @@
         /*Total number of zones on the device*/
         uint32_t        s_total_zones;
-        /*Magic number used to recognize MinixFS and to detect on-disk endianness*/
+        /*
+         *Magic number used to recognize MinixFS
+         *and to detect on-disk endianness
+         */
         int16_t         s_magic;
         int16_t         s_pad2;