#define EXT2_RESIZE_INO 7 /* Reserved group descriptors inode */
#define EXT2_JOURNAL_INO 8 /* Journal inode */
#define EXT2_EXCLUDE_INO 9 /* The "exclude" inode, for snapshots */
+#define EXT4_REPLICA_INO 10 /* Used by non-upstream feature */
/* First non-reserved inode for old ext2 filesystems */
#define EXT2_GOOD_OLD_FIRST_INO 11
__u16 bg_block_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+bitmap) LSB */
__u16 bg_inode_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+bitmap) LSB */
__u16 bg_itable_unused; /* Unused inodes count */
- __u16 bg_checksum; /* crc16(s_uuid+grouo_num+group_desc)*/
+ __u16 bg_checksum; /* crc16(s_uuid+group_num+group_desc)*/
};
/*
#define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_DESC_SIZE(s))
#endif
+#define EXT2_GROUPS_TO_BLOCKS(s, g) ((blk64_t) EXT2_BLOCKS_PER_GROUP(s) * \
+ (g))
+#define EXT2_GROUPS_TO_CLUSTERS(s, g) ((blk64_t) EXT2_CLUSTERS_PER_GROUP(s) * \
+ (g))
+
/*
* Constants relative to the data blocks
*/
#define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */
#define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */
#define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */
-#define EXT4_EOFBLOCKS_FL 0x00400000 /* Blocks allocated beyond EOF */
+/* EXT4_EOFBLOCKS_FL 0x00400000 was here */
+#define FS_NOCOW_FL 0x00800000 /* Do not cow file */
#define EXT4_SNAPFILE_FL 0x01000000 /* Inode is a snapshot */
#define EXT4_SNAPFILE_DELETED_FL 0x04000000 /* Snapshot is being deleted */
#define EXT4_SNAPFILE_SHRUNK_FL 0x08000000 /* Snapshot shrink has completed */
#define i_dir_acl i_size_high
+#define EXT2_FITS_IN_INODE(inode, field) \
+ ((offsetof(struct ext2_inode_large, field) + \
+ sizeof((inode)->field)) <= \
+ (EXT2_GOOD_OLD_INODE_SIZE + \
+ (inode)->i_extra_isize)) \
+
#if defined(__KERNEL__) || defined(__linux__)
#define i_reserved1 osd1.linux1.l_i_reserved1
#define i_frag osd2.linux2.l_i_frag
__u16 s_want_extra_isize; /* New inodes should reserve # bytes */
__u32 s_flags; /* Miscellaneous flags */
__u16 s_raid_stride; /* RAID stride */
- __u16 s_mmp_interval; /* # seconds to wait in MMP checking */
+ __u16 s_mmp_update_interval; /* # seconds to wait in MMP checking */
__u64 s_mmp_block; /* Block for multi-mount protection */
__u32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/
__u8 s_log_groups_per_flex; /* FLEX_BG group size */
__u32 s_usr_quota_inum; /* inode number of user quota file */
__u32 s_grp_quota_inum; /* inode number of group quota file */
__u32 s_overhead_blocks; /* overhead blocks/clusters in fs */
- __u32 s_reserved[108]; /* Padding to the end of the block */
+ __u32 s_backup_bgs[2]; /* If sparse_super2 enabled */
+ __u32 s_reserved[106]; /* Padding to the end of the block */
__u32 s_checksum; /* crc32c(superblock) */
};
#define EXT2_FEATURE_COMPAT_LAZY_BG 0x0040
/* #define EXT2_FEATURE_COMPAT_EXCLUDE_INODE 0x0080 not used, legacy */
#define EXT2_FEATURE_COMPAT_EXCLUDE_BITMAP 0x0100
+#define EXT4_FEATURE_COMPAT_SPARSE_SUPER2 0x0200
#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
#define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100
#define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200
#define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400
+#define EXT4_FEATURE_RO_COMPAT_REPLICA 0x0800
#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
#define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400
#define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000
+/* 0x2000 was EXT4_FEATURE_INCOMPAT_BG_USE_META_CSUM but this was never used */
+#define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */
+#define EXT4_FEATURE_INCOMPAT_INLINEDATA 0x8000 /* data in inode */
#define EXT2_FEATURE_COMPAT_SUPP 0
-#define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE)
+#define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \
+ EXT4_FEATURE_INCOMPAT_MMP| \
+ EXT4_FEATURE_INCOMPAT_EA_INODE)
#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
EXT4_FEATURE_RO_COMPAT_DIR_NLINK| \
+ EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE| \
EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
/*
~EXT2_DIR_ROUND)
/*
- * This structure will be used for multiple mount protection. It will be
- * written into the block number saved in the s_mmp_block field in the
- * superblock.
+ * This structure is used for multiple mount protection. It is written
+ * into the block number saved in the s_mmp_block field in the superblock.
+ * Programs that check MMP should assume that if SEQ_FSCK (or any unknown
+ * code above SEQ_MAX) is present then it is NOT safe to use the filesystem,
+ * regardless of how old the timestamp is.
+ *
+ * The timestamp in the MMP structure will be updated by e2fsck at some
+ * arbitary intervals (start of passes, after every few groups of inodes
+ * in pass1 and pass1b). There is no guarantee that e2fsck is updating
+ * the MMP block in a timely manner, and the updates it does are purely
+ * for the convenience of the sysadmin and not for automatic validation.
+ *
+ * Note: Only the mmp_seq value is used to determine whether the MMP block
+ * is being updated. The mmp_time, mmp_nodename, and mmp_bdevname
+ * fields are only for informational purposes for the administrator,
+ * due to clock skew between nodes and hostname HA service takeover.
*/
-#define EXT2_MMP_MAGIC 0x004D4D50 /* ASCII for MMP */
-#define EXT2_MMP_CLEAN 0xFF4D4D50 /* Value of mmp_seq for clean unmount */
-#define EXT2_MMP_FSCK_ON 0xE24D4D50 /* Value of mmp_seq when being fscked */
+#define EXT4_MMP_MAGIC 0x004D4D50U /* ASCII for MMP */
+#define EXT4_MMP_SEQ_CLEAN 0xFF4D4D50U /* mmp_seq value for clean unmount */
+#define EXT4_MMP_SEQ_FSCK 0xE24D4D50U /* mmp_seq value when being fscked */
+#define EXT4_MMP_SEQ_MAX 0xE24D4D4FU /* maximum valid mmp_seq value */
struct mmp_struct {
- __u32 mmp_magic;
- __u32 mmp_seq;
- __u64 mmp_time;
- char mmp_nodename[64];
- char mmp_bdevname[32];
- __u16 mmp_interval;
+ __u32 mmp_magic; /* Magic number for MMP */
+ __u32 mmp_seq; /* Sequence no. updated periodically */
+ __u64 mmp_time; /* Time last updated */
+ char mmp_nodename[64]; /* Node which last updated MMP block */
+ char mmp_bdevname[32]; /* Bdev which last updated MMP block */
+ __u16 mmp_check_interval; /* Changed mmp_check_interval */
__u16 mmp_pad1;
- __u32 mmp_pad2;
+ __u32 mmp_pad2[227];
};
/*
- * Interval in number of seconds to update the MMP sequence number.
+ * Default interval for MMP update in seconds.
+ */
+#define EXT4_MMP_UPDATE_INTERVAL 5
+
+/*
+ * Maximum interval for MMP update in seconds.
+ */
+#define EXT4_MMP_MAX_UPDATE_INTERVAL 300
+
+/*
+ * Minimum interval for MMP checking in seconds.
*/
-#define EXT2_MMP_DEF_INTERVAL 5
+#define EXT4_MMP_MIN_CHECK_INTERVAL 5
#endif /* _LINUX_EXT2_FS_H */
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff