* Performance hints. Directory preallocation should only
* happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on.
*/
- uint8_t s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
- uint8_t s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
+ uint8_t s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
+ uint8_t s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
uint16_t s_reserved_gdt_blocks; /* Per group table for online growth */
/*
* Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set.
*/
- uint8_t s_journal_uuid[16]; /* uuid of journal superblock */
- uint32_t s_journal_inum; /* inode number of journal file */
+/*D0*/ uint8_t s_journal_uuid[16]; /* uuid of journal superblock */
+/*E0*/ uint32_t s_journal_inum; /* inode number of journal file */
uint32_t s_journal_dev; /* device number of journal file */
uint32_t s_last_orphan; /* start of list of inodes to delete */
uint32_t s_hash_seed[4]; /* HTREE hash seed */
uint8_t s_def_hash_version; /* Default hash version to use */
uint8_t s_jnl_backup_type; /* Default type of journal backup */
uint16_t s_reserved_word_pad;
- uint32_t s_default_mount_opts;
+/*100*/ uint32_t s_default_mount_opts;
uint32_t s_first_meta_bg; /* First metablock group */
+ /* ext3 additions */
uint32_t s_mkfs_time; /* When the filesystem was created */
uint32_t s_jnl_blocks[17]; /* Backup of the journal inode */
- uint32_t s_reserved[172]; /* Padding to the end of the block */
+ /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */
+/*150*/ uint32_t s_blocks_count_hi; /* Blocks count */
+ uint32_t s_r_blocks_count_hi; /* Reserved blocks count */
+ uint32_t s_free_blocks_count_hi; /* Free blocks count */
+ uint16_t s_min_extra_isize; /* All inodes have at least # bytes */
+ uint16_t s_want_extra_isize; /* New inodes should reserve # bytes */
+ uint32_t s_flags; /* Miscellaneous flags */
+ uint16_t s_raid_stride; /* RAID stride */
+ uint16_t s_mmp_interval; /* # seconds to wait in MMP checking */
+ uint64_t s_mmp_block; /* Block for multi-mount protection */
+ uint32_t s_raid_stripe_width; /* blocks on all data disks (N*stride)*/
+ uint8_t s_log_groups_per_flex; /* FLEX_BG group size */
+ uint8_t s_reserved_char_pad2;
+ uint16_t s_reserved_pad;
+ uint32_t s_reserved[162]; /* Padding to the end of the block */
+};
+struct BUG_ext2_super_block {
+ char bug[sizeof(struct ext2_super_block) == 1024 ? 1 : -1];
};
/*
#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
( EXT2_SB(sb)->s_feature_incompat & (mask) )
+/* for s_feature_compat */
#define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
#define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
#define EXT2_FEATURE_COMPAT_RESIZE_INO 0x0010
#define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020
+/* for s_feature_ro_compat */
#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
-/* #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 not used */
+#define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 /* not used */
+#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008
+#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
+#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
+#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
+/* for s_feature_incompat */
#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
-#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
-#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
+#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004
+#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
#define EXT2_FEATURE_INCOMPAT_META_BG 0x0010
-#define EXT3_FEATURE_INCOMPAT_EXTENTS 0x0040
+#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040
+#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
+#define EXT4_FEATURE_INCOMPAT_MMP 0x0100
+#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
#define EXT2_FEATURE_COMPAT_SUPP 0
-#define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE)
#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
+#define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \
+ EXT2_FEATURE_INCOMPAT_META_BG)
+#define EXT2_FEATURE_INCOMPAT_UNSUPPORTED (~EXT2_FEATURE_INCOMPAT_SUPP)
+#define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED (~EXT2_FEATURE_RO_COMPAT_SUPP)
+
+#define EXT3_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
+ EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
+ EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
+#define EXT3_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \
+ EXT3_FEATURE_INCOMPAT_RECOVER| \
+ EXT2_FEATURE_INCOMPAT_META_BG)
+#define EXT3_FEATURE_INCOMPAT_UNSUPPORTED (~EXT3_FEATURE_INCOMPAT_SUPP)
+#define EXT3_FEATURE_RO_COMPAT_UNSUPPORTED (~EXT3_FEATURE_RO_COMPAT_SUPP)
+
/*
* Default values for user and/or group using reserved blocks
projects / oweals / busybox.git / blobdiff