X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lib%2Fext2fs%2Fext2_fs.h;h=d31891c448a30d32c8dad9712eb2fbb58f0ca513;hb=336c440ccea8f94b0728f881cddee84f730e7cc7;hp=554c708b37d512484b0030f82d07051451e684e1;hpb=5c4f8d674845095050f94ea95f3c73072cbe34b5;p=tools%2Fe2fsprogs.git diff --git a/lib/ext2fs/ext2_fs.h b/lib/ext2fs/ext2_fs.h index 554c708..d31891c 100644 --- a/lib/ext2fs/ext2_fs.h +++ b/lib/ext2fs/ext2_fs.h @@ -18,6 +18,15 @@ #include /* Changed from linux/types.h */ +#ifndef __GNUC_PREREQ +#if defined(__GNUC__) && defined(__GNUC_MINOR__) +#define __GNUC_PREREQ(maj, min) \ + ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) +#else +#define __GNUC_PREREQ(maj, min) 0 +#endif +#endif + /* * The second extended filesystem constants/structures */ @@ -44,12 +53,14 @@ */ #define EXT2_BAD_INO 1 /* Bad blocks inode */ #define EXT2_ROOT_INO 2 /* Root inode */ -#define EXT2_ACL_IDX_INO 3 /* ACL inode */ -#define EXT2_ACL_DATA_INO 4 /* ACL inode */ +#define EXT4_USR_QUOTA_INO 3 /* User quota inode */ +#define EXT4_GRP_QUOTA_INO 4 /* Group quota inode */ #define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */ #define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */ #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 @@ -97,18 +108,27 @@ #define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof(__u32)) /* + * Macro-instructions used to manage allocation clusters + */ +#define EXT2_MIN_CLUSTER_LOG_SIZE EXT2_MIN_BLOCK_LOG_SIZE +#define EXT2_MAX_CLUSTER_LOG_SIZE 29 /* 512MB */ +#define EXT2_MIN_CLUSTER_SIZE EXT2_MIN_BLOCK_SIZE +#define EXT2_MAX_CLUSTER_SIZE (1 << EXT2_MAX_CLUSTER_LOG_SIZE) +#define EXT2_CLUSTER_SIZE(s) (EXT2_MIN_BLOCK_SIZE << \ + (s)->s_log_cluster_size) +#define EXT2_CLUSTER_SIZE_BITS(s) ((s)->s_log_cluster_size + 10) + +/* * Macro-instructions used to manage fragments + * + * Note: for backwards compatibility only, for the dump program. + * Ext2/3/4 will never support fragments.... */ -#define EXT2_MIN_FRAG_SIZE EXT2_MIN_BLOCK_SIZE -#define EXT2_MAX_FRAG_SIZE EXT2_MAX_BLOCK_SIZE -#define EXT2_MIN_FRAG_LOG_SIZE EXT2_MIN_BLOCK_LOG_SIZE -#ifdef __KERNEL__ -# define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->s_frag_size) -# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->s_frags_per_block) -#else -# define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size) -# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s)) -#endif +#define EXT2_MIN_FRAG_SIZE EXT2_MIN_BLOCK_SIZE +#define EXT2_MAX_FRAG_SIZE EXT2_MAX_BLOCK_SIZE +#define EXT2_MIN_FRAG_LOG_SIZE EXT2_MIN_BLOCK_LOG_SIZE +#define EXT2_FRAG_SIZE(s) EXT2_BLOCK_SIZE(s) +#define EXT2_FRAGS_PER_BLOCK(s) 1 /* * ACL structures @@ -144,11 +164,16 @@ struct ext2_group_desc __u16 bg_free_inodes_count; /* Free inodes count */ __u16 bg_used_dirs_count; /* Directories count */ __u16 bg_flags; - __u32 bg_reserved[2]; + __u32 bg_exclude_bitmap_lo; /* Exclude bitmap for snapshots */ + __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)*/ }; +/* + * Structure of a blocks group descriptor + */ struct ext4_group_desc { __u32 bg_block_bitmap; /* Blocks bitmap block */ @@ -157,20 +182,32 @@ struct ext4_group_desc __u16 bg_free_blocks_count; /* Free blocks count */ __u16 bg_free_inodes_count; /* Free inodes count */ __u16 bg_used_dirs_count; /* Directories count */ - __u16 bg_flags; - __u32 bg_reserved[2]; + __u16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */ + __u32 bg_exclude_bitmap_lo; /* Exclude bitmap for snapshots */ + __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(sb_uuid+group+desc) */ __u32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ __u32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ __u32 bg_inode_table_hi; /* Inodes table block MSB */ __u16 bg_free_blocks_count_hi;/* Free blocks count MSB */ __u16 bg_free_inodes_count_hi;/* Free inodes count MSB */ __u16 bg_used_dirs_count_hi; /* Directories count MSB */ - __u16 bg_pad; - __u32 bg_reserved2[3]; + __u16 bg_itable_unused_hi; /* Unused inodes count MSB */ + __u32 bg_exclude_bitmap_hi; /* Exclude bitmap block MSB */ + __u16 bg_block_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+bitmap) MSB */ + __u16 bg_inode_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+bitmap) MSB */ + __u32 bg_reserved; }; +#define EXT4_BG_INODE_BITMAP_CSUM_HI_END \ + (offsetof(struct ext4_group_desc, bg_inode_bitmap_csum_hi) + \ + sizeof(__u16)) +#define EXT4_BG_BLOCK_BITMAP_CSUM_HI_LOCATION \ + (offsetof(struct ext4_group_desc, bg_block_bitmap_csum_hi) + \ + sizeof(__u16)) + #define EXT2_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not initialized */ #define EXT2_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not initialized */ #define EXT2_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ @@ -204,16 +241,25 @@ struct ext2_dx_root_info { #define EXT2_HASH_FLAG_INCOMPAT 0x1 +#define EXT4_DX_BLOCK_MASK 0x0fffffff + struct ext2_dx_entry { - __u32 hash; - __u32 block; + __le32 hash; + __le32 block; }; struct ext2_dx_countlimit { - __u16 limit; - __u16 count; + __le16 limit; + __le16 count; }; +/* + * This goes at the end of each htree block. + */ +struct ext2_dx_tail { + __le32 dt_reserved; + __le32 dt_checksum; /* crc32c(uuid+inum+dxblock) */ +}; /* * Macro-instructions used to manage group descriptors @@ -227,10 +273,15 @@ struct ext2_dx_countlimit { #define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->s_blocks_per_group) #define EXT2_INODES_PER_GROUP(s) (EXT2_SB(s)->s_inodes_per_group) +#define EXT2_CLUSTERS_PER_GROUP(s) (EXT2_SB(s)->s_clusters_per_group) #define EXT2_INODES_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s)/EXT2_INODE_SIZE(s)) /* limits imposed by 16-bit value gd_free_{blocks,inode}_count */ -#define EXT2_MAX_BLOCKS_PER_GROUP(s) ((1 << 16) - 8) -#define EXT2_MAX_INODES_PER_GROUP(s) ((1 << 16) - EXT2_INODES_PER_BLOCK(s)) +#define EXT2_MAX_BLOCKS_PER_GROUP(s) ((((unsigned) 1 << 16) - 8) * \ + (EXT2_CLUSTER_SIZE(s) / \ + EXT2_BLOCK_SIZE(s))) +#define EXT2_MAX_CLUSTERS_PER_GROUP(s) (((unsigned) 1 << 16) - 8) +#define EXT2_MAX_INODES_PER_GROUP(s) (((unsigned) 1 << 16) - \ + EXT2_INODES_PER_BLOCK(s)) #ifdef __KERNEL__ #define EXT2_DESC_PER_BLOCK(s) (EXT2_SB(s)->s_desc_per_block) #define EXT2_DESC_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_desc_per_block_bits) @@ -238,6 +289,11 @@ struct ext2_dx_countlimit { #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 */ @@ -262,7 +318,8 @@ struct ext2_dx_countlimit { #define EXT2_DIRTY_FL 0x00000100 #define EXT2_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ #define EXT2_NOCOMPR_FL 0x00000400 /* Access raw compressed data */ -#define EXT2_ECOMPR_FL 0x00000800 /* Compression error */ + /* nb: was previously EXT2_ECOMPR_FL */ +#define EXT4_ENCRYPT_FL 0x00000800 /* encrypted inode */ /* End compression flags --- maybe not all used */ #define EXT2_BTREE_FL 0x00001000 /* btree format dir */ #define EXT2_INDEX_FL 0x00001000 /* hash-indexed directory */ @@ -273,10 +330,20 @@ struct ext2_dx_countlimit { #define EXT2_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ #define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ #define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ +#define EXT4_VERITY_FL 0x00100000 /* Verity protected inode */ +#define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */ +/* 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 EXT4_INLINE_DATA_FL 0x10000000 /* Inode has inline data */ +#define EXT4_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ +#define EXT4_CASEFOLD_FL 0x40000000 /* Casefolded file */ #define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ -#define EXT2_FL_USER_VISIBLE 0x000BDFFF /* User visible flags */ -#define EXT2_FL_USER_MODIFIABLE 0x000080FF /* User modifiable flags */ +#define EXT2_FL_USER_VISIBLE 0x604BDFFF /* User visible flags */ +#define EXT2_FL_USER_MODIFIABLE 0x604B80FF /* User modifiable flags */ /* * ioctl commands @@ -316,22 +383,23 @@ struct ext4_new_group_input { #define EXT2_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) #define EXT2_IOC_GROUP_ADD _IOW('f', 8,struct ext2_new_group_input) #define EXT4_IOC_GROUP_ADD _IOW('f', 8,struct ext4_new_group_input) +#define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64) /* * Structure of an inode on the disk */ struct ext2_inode { - __u16 i_mode; /* File mode */ +/*00*/ __u16 i_mode; /* File mode */ __u16 i_uid; /* Low 16 bits of Owner Uid */ __u32 i_size; /* Size in bytes */ __u32 i_atime; /* Access time */ __u32 i_ctime; /* Inode change time */ - __u32 i_mtime; /* Modification time */ +/*10*/ __u32 i_mtime; /* Modification time */ __u32 i_dtime; /* Deletion Time */ __u16 i_gid; /* Low 16 bits of Group Id */ __u16 i_links_count; /* Links count */ __u32 i_blocks; /* Blocks count */ - __u32 i_flags; /* File flags */ +/*20*/ __u32 i_flags; /* File flags */ union { struct { __u32 l_i_version; /* was l_i_reserved1 */ @@ -340,18 +408,19 @@ struct ext2_inode { __u32 h_i_translator; } hurd1; } osd1; /* OS dependent 1 */ - __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ - __u32 i_generation; /* File version (for NFS) */ +/*28*/ __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ +/*64*/ __u32 i_generation; /* File version (for NFS) */ __u32 i_file_acl; /* File ACL */ - __u32 i_dir_acl; /* Directory ACL */ - __u32 i_faddr; /* Fragment address */ + __u32 i_size_high; +/*70*/ __u32 i_faddr; /* Fragment address */ union { struct { __u16 l_i_blocks_hi; __u16 l_i_file_acl_high; __u16 l_i_uid_high; /* these 2 fields */ __u16 l_i_gid_high; /* were reserved2[0] */ - __u32 l_i_reserved2; + __u16 l_i_checksum_lo; /* crc32c(uuid+inum+inode) */ + __u16 l_i_reserved; } linux2; struct { __u8 h_i_frag; /* Fragment number */ @@ -368,17 +437,17 @@ struct ext2_inode { * Permanent part of an large inode on the disk */ struct ext2_inode_large { - __u16 i_mode; /* File mode */ +/*00*/ __u16 i_mode; /* File mode */ __u16 i_uid; /* Low 16 bits of Owner Uid */ __u32 i_size; /* Size in bytes */ __u32 i_atime; /* Access time */ __u32 i_ctime; /* Inode Change time */ - __u32 i_mtime; /* Modification time */ +/*10*/ __u32 i_mtime; /* Modification time */ __u32 i_dtime; /* Deletion Time */ __u16 i_gid; /* Low 16 bits of Group Id */ __u16 i_links_count; /* Links count */ __u32 i_blocks; /* Blocks count */ - __u32 i_flags; /* File flags */ +/*20*/ __u32 i_flags; /* File flags */ union { struct { __u32 l_i_version; /* was l_i_reserved1 */ @@ -387,18 +456,19 @@ struct ext2_inode_large { __u32 h_i_translator; } hurd1; } osd1; /* OS dependent 1 */ - __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ - __u32 i_generation; /* File version (for NFS) */ +/*28*/ __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ +/*64*/ __u32 i_generation; /* File version (for NFS) */ __u32 i_file_acl; /* File ACL */ - __u32 i_dir_acl; /* Directory ACL */ - __u32 i_faddr; /* Fragment address */ + __u32 i_size_high; +/*70*/ __u32 i_faddr; /* Fragment address */ union { struct { __u16 l_i_blocks_hi; __u16 l_i_file_acl_high; __u16 l_i_uid_high; /* these 2 fields */ __u16 l_i_gid_high; /* were reserved2[0] */ - __u32 l_i_reserved2; + __u16 l_i_checksum_lo; /* crc32c(uuid+inum+inode) */ + __u16 l_i_reserved; } linux2; struct { __u8 h_i_frag; /* Fragment number */ @@ -409,17 +479,29 @@ struct ext2_inode_large { __u32 h_i_author; } hurd2; } osd2; /* OS dependent 2 */ - __u16 i_extra_isize; - __u16 i_pad1; +/*80*/ __u16 i_extra_isize; + __u16 i_checksum_hi; /* crc32c(uuid+inum+inode) */ __u32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */ __u32 i_mtime_extra; /* extra Modification time (nsec << 2 | epoch) */ __u32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ - __u32 i_crtime; /* File creation time */ +/*90*/ __u32 i_crtime; /* File creation time */ __u32 i_crtime_extra; /* extra File creation time (nsec << 2 | epoch)*/ __u32 i_version_hi; /* high 32 bits for 64-bit version */ +/*9c*/ __u32 i_projid; /* Project ID */ }; -#define i_size_high i_dir_acl +#define EXT4_INODE_CSUM_HI_EXTRA_END \ + (offsetof(struct ext2_inode_large, i_checksum_hi) + sizeof(__u16) - \ + EXT2_GOOD_OLD_INODE_SIZE) + +#define EXT4_EPOCH_BITS 2 +#define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1) + +#define i_checksum_lo osd2.linux2.l_i_checksum_lo + +#define inode_includes(size, field) \ + (size >= (sizeof(((struct ext2_inode_large *)0)->field) + \ + offsetof(struct ext2_inode_large, field))) #if defined(__KERNEL__) || defined(__linux__) #define i_reserved1 osd1.linux1.l_i_reserved1 @@ -429,7 +511,6 @@ struct ext2_inode_large { #define i_gid_low i_gid #define i_uid_high osd2.linux2.l_i_uid_high #define i_gid_high osd2.linux2.l_i_gid_high -#define i_reserved2 osd2.linux2.l_i_reserved2 #else #if defined(__GNU__) @@ -445,9 +526,16 @@ struct ext2_inode_large { #define inode_uid(inode) ((inode).i_uid | (inode).osd2.linux2.l_i_uid_high << 16) #define inode_gid(inode) ((inode).i_gid | (inode).osd2.linux2.l_i_gid_high << 16) +#define inode_projid(inode) ((inode).i_projid) #define ext2fs_set_i_uid_high(inode,x) ((inode).osd2.linux2.l_i_uid_high = (x)) #define ext2fs_set_i_gid_high(inode,x) ((inode).osd2.linux2.l_i_gid_high = (x)) +static inline +struct ext2_inode *EXT2_INODE(struct ext2_inode_large *large_inode) +{ + return (struct ext2_inode *) large_inode; +} + /* * File system states */ @@ -461,6 +549,9 @@ struct ext2_inode_large { #define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ #define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ #define EXT2_FLAGS_TEST_FILESYS 0x0004 /* OK for use on development code */ +#define EXT2_FLAGS_IS_SNAPSHOT 0x0010 /* This is a snapshot image */ +#define EXT2_FLAGS_FIX_SNAPSHOT 0x0020 /* Snapshot inodes corrupted */ +#define EXT2_FLAGS_FIX_EXCLUDE 0x0040 /* Exclude bitmaps corrupted */ /* * Mount flags @@ -492,34 +583,84 @@ struct ext2_inode_large { #define EXT2_ERRORS_PANIC 3 /* Panic */ #define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE +#if (__GNUC__ >= 4) +#define ext4_offsetof(TYPE,MEMBER) __builtin_offsetof(TYPE,MEMBER) +#else +#define ext4_offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) +#endif + +/* Metadata checksum algorithms */ +#define EXT2_CRC32C_CHKSUM 1 + +/* Encryption algorithms, key size and key reference len */ +#define EXT4_ENCRYPTION_MODE_INVALID 0 +#define EXT4_ENCRYPTION_MODE_AES_256_XTS 1 +#define EXT4_ENCRYPTION_MODE_AES_256_GCM 2 +#define EXT4_ENCRYPTION_MODE_AES_256_CBC 3 +#define EXT4_ENCRYPTION_MODE_AES_256_CTS 4 + +#define EXT4_AES_256_XTS_KEY_SIZE 64 +#define EXT4_AES_256_GCM_KEY_SIZE 32 +#define EXT4_AES_256_CBC_KEY_SIZE 32 +#define EXT4_AES_256_CTS_KEY_SIZE 32 +#define EXT4_MAX_KEY_SIZE 64 + +#define EXT4_KEY_DESCRIPTOR_SIZE 8 +#define EXT4_CRYPTO_BLOCK_SIZE 16 + +/* Password derivation constants */ +#define EXT4_MAX_PASSPHRASE_SIZE 1024 +#define EXT4_MAX_SALT_SIZE 256 +#define EXT4_PBKDF2_ITERATIONS 0xFFFF + +#define EXT2_LABEL_LEN 16 + +/* + * Policy provided via an ioctl on the topmost directory. This + * structure is also in the kernel. + */ +struct ext4_encryption_policy { + char version; + char contents_encryption_mode; + char filenames_encryption_mode; + char flags; + char master_key_descriptor[EXT4_KEY_DESCRIPTOR_SIZE]; +} __attribute__((__packed__)); + +struct ext4_encryption_key { + __u32 mode; + char raw[EXT4_MAX_KEY_SIZE]; + __u32 size; +} __attribute__((__packed__)); + /* * Structure of the super block */ struct ext2_super_block { - __u32 s_inodes_count; /* Inodes count */ +/*000*/ __u32 s_inodes_count; /* Inodes count */ __u32 s_blocks_count; /* Blocks count */ __u32 s_r_blocks_count; /* Reserved blocks count */ __u32 s_free_blocks_count; /* Free blocks count */ - __u32 s_free_inodes_count; /* Free inodes count */ +/*010*/ __u32 s_free_inodes_count; /* Free inodes count */ __u32 s_first_data_block; /* First Data Block */ __u32 s_log_block_size; /* Block size */ - __s32 s_log_frag_size; /* Fragment size */ - __u32 s_blocks_per_group; /* # Blocks per group */ - __u32 s_frags_per_group; /* # Fragments per group */ + __u32 s_log_cluster_size; /* Allocation cluster size */ +/*020*/ __u32 s_blocks_per_group; /* # Blocks per group */ + __u32 s_clusters_per_group; /* # Fragments per group */ __u32 s_inodes_per_group; /* # Inodes per group */ __u32 s_mtime; /* Mount time */ - __u32 s_wtime; /* Write time */ +/*030*/ __u32 s_wtime; /* Write time */ __u16 s_mnt_count; /* Mount count */ __s16 s_max_mnt_count; /* Maximal mount count */ __u16 s_magic; /* Magic signature */ __u16 s_state; /* File system state */ __u16 s_errors; /* Behaviour when detecting errors */ __u16 s_minor_rev_level; /* minor revision level */ - __u32 s_lastcheck; /* time of last check */ +/*040*/ __u32 s_lastcheck; /* time of last check */ __u32 s_checkinterval; /* max. time between checks */ __u32 s_creator_os; /* OS */ __u32 s_rev_level; /* Revision level */ - __u16 s_def_resuid; /* Default uid for reserved blocks */ +/*050*/ __u16 s_def_resuid; /* Default uid for reserved blocks */ __u16 s_def_resgid; /* Default gid for reserved blocks */ /* * These fields are for EXT2_DYNAMIC_REV superblocks only. @@ -538,12 +679,12 @@ struct ext2_super_block { __u16 s_inode_size; /* size of inode structure */ __u16 s_block_group_nr; /* block group # of this superblock */ __u32 s_feature_compat; /* compatible feature set */ - __u32 s_feature_incompat; /* incompatible feature set */ +/*060*/ __u32 s_feature_incompat; /* incompatible feature set */ __u32 s_feature_ro_compat; /* readonly-compatible feature set */ - __u8 s_uuid[16]; /* 128-bit uuid for volume */ - char s_volume_name[16]; /* volume name */ - char s_last_mounted[64]; /* directory where last mounted */ - __u32 s_algorithm_usage_bitmap; /* For compression */ +/*068*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ +/*078*/ __u8 s_volume_name[EXT2_LABEL_LEN]; /* volume name, no NUL? */ +/*088*/ __u8 s_last_mounted[64]; /* directory last mounted on, no NUL? */ +/*0c8*/ __u32 s_algorithm_usage_bitmap; /* For compression */ /* * Performance hints. Directory preallocation should only * happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on. @@ -554,34 +695,76 @@ struct ext2_super_block { /* * Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set. */ - __u8 s_journal_uuid[16]; /* uuid of journal superblock */ - __u32 s_journal_inum; /* inode number of journal file */ +/*0d0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ +/*0e0*/ __u32 s_journal_inum; /* inode number of journal file */ __u32 s_journal_dev; /* device number of journal file */ __u32 s_last_orphan; /* start of list of inodes to delete */ - __u32 s_hash_seed[4]; /* HTREE hash seed */ - __u8 s_def_hash_version; /* Default hash version to use */ - __u8 s_jnl_backup_type; /* Default type of journal backup */ +/*0ec*/ __u32 s_hash_seed[4]; /* HTREE hash seed */ +/*0fc*/ __u8 s_def_hash_version; /* Default hash version to use */ + __u8 s_jnl_backup_type; /* Default type of journal backup */ __u16 s_desc_size; /* Group desc. size: INCOMPAT_64BIT */ - __u32 s_default_mount_opts; +/*100*/ __u32 s_default_mount_opts; /* default EXT2_MOUNT_* flags used */ __u32 s_first_meta_bg; /* First metablock group */ __u32 s_mkfs_time; /* When the filesystem was created */ - __u32 s_jnl_blocks[17]; /* Backup of the journal inode */ - __u32 s_blocks_count_hi; /* Blocks count high 32bits */ +/*10c*/ __u32 s_jnl_blocks[17]; /* Backup of the journal inode */ +/*150*/ __u32 s_blocks_count_hi; /* Blocks count high 32bits */ __u32 s_r_blocks_count_hi; /* Reserved blocks count high 32 bits*/ - __u32 s_free_blocks_hi; /* Free blocks count */ + __u32 s_free_blocks_hi; /* Free blocks count */ __u16 s_min_extra_isize; /* All inodes have at least # bytes */ - __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 */ - __u64 s_mmp_block; /* Block for multi-mount protection */ - __u32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ + __u16 s_want_extra_isize; /* New inodes should reserve # bytes */ +/*160*/ __u32 s_flags; /* Miscellaneous flags */ + __u16 s_raid_stride; /* RAID stride in blocks */ + __u16 s_mmp_update_interval; /* # seconds to wait in MMP checking */ + __u64 s_mmp_block; /* Block for multi-mount protection */ +/*170*/ __u32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ __u8 s_log_groups_per_flex; /* FLEX_BG group size */ - __u8 s_reserved_char_pad; - __u16 s_reserved_pad; /* Padding to next 32bits */ - __u32 s_reserved[162]; /* Padding to the end of the block */ + __u8 s_checksum_type; /* metadata checksum algorithm */ + __u8 s_encryption_level; /* versioning level for encryption */ + __u8 s_reserved_pad; /* Padding to next 32bits */ + __u64 s_kbytes_written; /* nr of lifetime kilobytes written */ +/*180*/ __u32 s_snapshot_inum; /* Inode number of active snapshot */ + __u32 s_snapshot_id; /* sequential ID of active snapshot */ + __u64 s_snapshot_r_blocks_count; /* active snapshot reserved blocks */ +/*190*/ __u32 s_snapshot_list; /* inode number of disk snapshot list */ +#define EXT4_S_ERR_START ext4_offsetof(struct ext2_super_block, s_error_count) + __u32 s_error_count; /* number of fs errors */ + __u32 s_first_error_time; /* first time an error happened */ + __u32 s_first_error_ino; /* inode involved in first error */ +/*1a0*/ __u64 s_first_error_block; /* block involved in first error */ + __u8 s_first_error_func[32]; /* function where error hit, no NUL? */ +/*1c8*/ __u32 s_first_error_line; /* line number where error happened */ + __u32 s_last_error_time; /* most recent time of an error */ +/*1d0*/ __u32 s_last_error_ino; /* inode involved in last error */ + __u32 s_last_error_line; /* line number where error happened */ + __u64 s_last_error_block; /* block involved of last error */ +/*1e0*/ __u8 s_last_error_func[32]; /* function where error hit, no NUL? */ +#define EXT4_S_ERR_END ext4_offsetof(struct ext2_super_block, s_mount_opts) +/*200*/ __u8 s_mount_opts[64]; /* default mount options, no NUL? */ +/*240*/ __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 */ +/*24c*/ __u32 s_backup_bgs[2]; /* If sparse_super2 enabled */ +/*254*/ __u8 s_encrypt_algos[4]; /* Encryption algorithms in use */ +/*258*/ __u8 s_encrypt_pw_salt[16]; /* Salt used for string2key algorithm */ +/*268*/ __le32 s_lpf_ino; /* Location of the lost+found inode */ + __le32 s_prj_quota_inum; /* inode for tracking project quota */ +/*270*/ __le32 s_checksum_seed; /* crc32c(orig_uuid) if csum_seed set */ +/*274*/ __u8 s_wtime_hi; + __u8 s_mtime_hi; + __u8 s_mkfs_time_hi; + __u8 s_lastcheck_hi; + __u8 s_first_error_time_hi; + __u8 s_last_error_time_hi; + __u8 s_pad[2]; +/*27c*/ __le16 s_encoding; /* Filename charset encoding */ + __le16 s_encoding_flags; /* Filename charset encoding flags */ + __le32 s_reserved[95]; /* Padding to the end of the block */ +/*3fc*/ __u32 s_checksum; /* crc32c(superblock) */ }; +#define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START) +#define EXT2_LEN_STR(buf) (int)sizeof(buf), (char *)buf + /* * Codes for operating systems */ @@ -625,6 +808,11 @@ struct ext2_super_block { #define EXT2_FEATURE_COMPAT_RESIZE_INODE 0x0010 #define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020 #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 EXT4_FEATURE_COMPAT_FAST_COMMIT 0x0400 + #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 @@ -633,6 +821,20 @@ struct ext2_super_block { #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 +#define EXT4_FEATURE_RO_COMPAT_HAS_SNAPSHOT 0x0080 +#define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100 +#define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200 +/* + * METADATA_CSUM implies GDT_CSUM. When METADATA_CSUM is set, group + * descriptor checksums use the same algorithm as all other data + * structures' checksums. + */ +#define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400 +#define EXT4_FEATURE_RO_COMPAT_REPLICA 0x0800 +#define EXT4_FEATURE_RO_COMPAT_READONLY 0x1000 +#define EXT4_FEATURE_RO_COMPAT_PROJECT 0x2000 /* Project quota */ +#define EXT4_FEATURE_RO_COMPAT_SHARED_BLOCKS 0x4000 +#define EXT4_FEATURE_RO_COMPAT_VERITY 0x8000 #define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001 #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002 @@ -643,14 +845,119 @@ struct ext2_super_block { #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 #define EXT4_FEATURE_INCOMPAT_MMP 0x0100 #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 - +#define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 +#define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 +#define EXT4_FEATURE_INCOMPAT_CSUM_SEED 0x2000 +#define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */ +#define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */ +#define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000 +#define EXT4_FEATURE_INCOMPAT_CASEFOLD 0x20000 + +#define EXT4_FEATURE_COMPAT_FUNCS(name, ver, flagname) \ +static inline int ext2fs_has_feature_##name(struct ext2_super_block *sb) \ +{ \ + return ((EXT2_SB(sb)->s_feature_compat & \ + EXT##ver##_FEATURE_COMPAT_##flagname) != 0); \ +} \ +static inline void ext2fs_set_feature_##name(struct ext2_super_block *sb) \ +{ \ + EXT2_SB(sb)->s_feature_compat |= \ + EXT##ver##_FEATURE_COMPAT_##flagname; \ +} \ +static inline void ext2fs_clear_feature_##name(struct ext2_super_block *sb) \ +{ \ + EXT2_SB(sb)->s_feature_compat &= \ + ~EXT##ver##_FEATURE_COMPAT_##flagname; \ +} + +#define EXT4_FEATURE_RO_COMPAT_FUNCS(name, ver, flagname) \ +static inline int ext2fs_has_feature_##name(struct ext2_super_block *sb) \ +{ \ + return ((EXT2_SB(sb)->s_feature_ro_compat & \ + EXT##ver##_FEATURE_RO_COMPAT_##flagname) != 0); \ +} \ +static inline void ext2fs_set_feature_##name(struct ext2_super_block *sb) \ +{ \ + EXT2_SB(sb)->s_feature_ro_compat |= \ + EXT##ver##_FEATURE_RO_COMPAT_##flagname; \ +} \ +static inline void ext2fs_clear_feature_##name(struct ext2_super_block *sb) \ +{ \ + EXT2_SB(sb)->s_feature_ro_compat &= \ + ~EXT##ver##_FEATURE_RO_COMPAT_##flagname; \ +} + +#define EXT4_FEATURE_INCOMPAT_FUNCS(name, ver, flagname) \ +static inline int ext2fs_has_feature_##name(struct ext2_super_block *sb) \ +{ \ + return ((EXT2_SB(sb)->s_feature_incompat & \ + EXT##ver##_FEATURE_INCOMPAT_##flagname) != 0); \ +} \ +static inline void ext2fs_set_feature_##name(struct ext2_super_block *sb) \ +{ \ + EXT2_SB(sb)->s_feature_incompat |= \ + EXT##ver##_FEATURE_INCOMPAT_##flagname; \ +} \ +static inline void ext2fs_clear_feature_##name(struct ext2_super_block *sb) \ +{ \ + EXT2_SB(sb)->s_feature_incompat &= \ + ~EXT##ver##_FEATURE_INCOMPAT_##flagname; \ +} + +EXT4_FEATURE_COMPAT_FUNCS(dir_prealloc, 2, DIR_PREALLOC) +EXT4_FEATURE_COMPAT_FUNCS(imagic_inodes, 2, IMAGIC_INODES) +EXT4_FEATURE_COMPAT_FUNCS(journal, 3, HAS_JOURNAL) +EXT4_FEATURE_COMPAT_FUNCS(xattr, 2, EXT_ATTR) +EXT4_FEATURE_COMPAT_FUNCS(resize_inode, 2, RESIZE_INODE) +EXT4_FEATURE_COMPAT_FUNCS(dir_index, 2, DIR_INDEX) +EXT4_FEATURE_COMPAT_FUNCS(lazy_bg, 2, LAZY_BG) +EXT4_FEATURE_COMPAT_FUNCS(exclude_bitmap, 2, EXCLUDE_BITMAP) +EXT4_FEATURE_COMPAT_FUNCS(sparse_super2, 4, SPARSE_SUPER2) +EXT4_FEATURE_COMPAT_FUNCS(fast_commit, 4, FAST_COMMIT) + +EXT4_FEATURE_RO_COMPAT_FUNCS(sparse_super, 2, SPARSE_SUPER) +EXT4_FEATURE_RO_COMPAT_FUNCS(large_file, 2, LARGE_FILE) +EXT4_FEATURE_RO_COMPAT_FUNCS(huge_file, 4, HUGE_FILE) +EXT4_FEATURE_RO_COMPAT_FUNCS(gdt_csum, 4, GDT_CSUM) +EXT4_FEATURE_RO_COMPAT_FUNCS(dir_nlink, 4, DIR_NLINK) +EXT4_FEATURE_RO_COMPAT_FUNCS(extra_isize, 4, EXTRA_ISIZE) +EXT4_FEATURE_RO_COMPAT_FUNCS(has_snapshot, 4, HAS_SNAPSHOT) +EXT4_FEATURE_RO_COMPAT_FUNCS(quota, 4, QUOTA) +EXT4_FEATURE_RO_COMPAT_FUNCS(bigalloc, 4, BIGALLOC) +EXT4_FEATURE_RO_COMPAT_FUNCS(metadata_csum, 4, METADATA_CSUM) +EXT4_FEATURE_RO_COMPAT_FUNCS(replica, 4, REPLICA) +EXT4_FEATURE_RO_COMPAT_FUNCS(readonly, 4, READONLY) +EXT4_FEATURE_RO_COMPAT_FUNCS(project, 4, PROJECT) +EXT4_FEATURE_RO_COMPAT_FUNCS(shared_blocks, 4, SHARED_BLOCKS) +EXT4_FEATURE_RO_COMPAT_FUNCS(verity, 4, VERITY) + +EXT4_FEATURE_INCOMPAT_FUNCS(compression, 2, COMPRESSION) +EXT4_FEATURE_INCOMPAT_FUNCS(filetype, 2, FILETYPE) +EXT4_FEATURE_INCOMPAT_FUNCS(journal_needs_recovery, 3, RECOVER) +EXT4_FEATURE_INCOMPAT_FUNCS(journal_dev, 3, JOURNAL_DEV) +EXT4_FEATURE_INCOMPAT_FUNCS(meta_bg, 2, META_BG) +EXT4_FEATURE_INCOMPAT_FUNCS(extents, 3, EXTENTS) +EXT4_FEATURE_INCOMPAT_FUNCS(64bit, 4, 64BIT) +EXT4_FEATURE_INCOMPAT_FUNCS(mmp, 4, MMP) +EXT4_FEATURE_INCOMPAT_FUNCS(flex_bg, 4, FLEX_BG) +EXT4_FEATURE_INCOMPAT_FUNCS(ea_inode, 4, EA_INODE) +EXT4_FEATURE_INCOMPAT_FUNCS(dirdata, 4, DIRDATA) +EXT4_FEATURE_INCOMPAT_FUNCS(csum_seed, 4, CSUM_SEED) +EXT4_FEATURE_INCOMPAT_FUNCS(largedir, 4, LARGEDIR) +EXT4_FEATURE_INCOMPAT_FUNCS(inline_data, 4, INLINE_DATA) +EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, 4, ENCRYPT) +EXT4_FEATURE_INCOMPAT_FUNCS(casefold, 4, CASEFOLD) #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_LARGEDIR| \ + 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| \ - EXT2_FEATURE_RO_COMPAT_BTREE_DIR) + EXT2_FEATURE_RO_COMPAT_BTREE_DIR| \ + EXT4_FEATURE_RO_COMPAT_VERITY) /* * Default values for user and/or group using reserved blocks @@ -666,10 +973,14 @@ struct ext2_super_block { #define EXT2_DEFM_XATTR_USER 0x0004 #define EXT2_DEFM_ACL 0x0008 #define EXT2_DEFM_UID16 0x0010 -#define EXT3_DEFM_JMODE 0x0060 +#define EXT3_DEFM_JMODE 0x0060 #define EXT3_DEFM_JMODE_DATA 0x0020 #define EXT3_DEFM_JMODE_ORDERED 0x0040 #define EXT3_DEFM_JMODE_WBACK 0x0060 +#define EXT4_DEFM_NOBARRIER 0x0100 +#define EXT4_DEFM_BLOCK_VALIDITY 0x0200 +#define EXT4_DEFM_DISCARD 0x0400 +#define EXT4_DEFM_NODELALLOC 0x0800 /* * Structure of a directory entry @@ -688,6 +999,14 @@ struct ext2_dir_entry { * stored in intel byte order, and the name_len field could never be * bigger than 255 chars, it's safe to reclaim the extra byte for the * file_type field. + * + * This structure is deprecated due to endian issues. Please use struct + * ext2_dir_entry and accessor functions + * ext2fs_dirent_name_len + * ext2fs_dirent_set_name_len + * ext2fs_dirent_file_type + * ext2fs_dirent_set_file_type + * to get and set name_len and file_type fields. */ struct ext2_dir_entry_2 { __u32 inode; /* Inode number */ @@ -698,6 +1017,17 @@ struct ext2_dir_entry_2 { }; /* + * This is a bogus directory entry at the end of each leaf block that + * records checksums. + */ +struct ext2_dir_entry_tail { + __u32 det_reserved_zero1; /* Pretend to be unused */ + __u16 det_rec_len; /* 12 */ + __u16 det_reserved_name_len; /* 0xDE00, fake namelen/filetype */ + __u32 det_checksum; /* crc32c(uuid+inode+dirent) */ +}; + +/* * Ext2 directory file types. Only the low 3 bits are used. The * other bits are reserved for now. */ @@ -713,38 +1043,96 @@ struct ext2_dir_entry_2 { #define EXT2_FT_MAX 8 /* + * Annoyingly, e2fsprogs always swab16s ext2_dir_entry.name_len, so we + * have to build ext2_dir_entry_tail with that assumption too. This + * constant helps to build the dir_entry_tail to look like it has an + * "invalid" file type. + */ +#define EXT2_DIR_NAME_LEN_CSUM 0xDE00 + +/* * EXT2_DIR_PAD defines the directory entries boundaries * * NOTE: It must be a multiple of 4 */ +#define EXT2_DIR_ENTRY_HEADER_LEN 8 #define EXT2_DIR_PAD 4 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1) -#define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \ +#define EXT2_DIR_REC_LEN(name_len) (((name_len) + \ + EXT2_DIR_ENTRY_HEADER_LEN + \ + EXT2_DIR_ROUND) & \ ~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. + * Constants for ext4's extended time encoding */ -#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_EPOCH_BITS 2 +#define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1) +#define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS) +/* + * 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 + * arbitrary 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 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 */ + +/* Not endian-annotated; it's swapped at read/write time */ 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 (seconds) */ + __u8 mmp_nodename[64]; /* Node updating MMP block, no NUL? */ + __u8 mmp_bdevname[32]; /* Bdev updating MMP block, no NUL? */ + __u16 mmp_check_interval; /* Changed mmp_check_interval */ __u16 mmp_pad1; - __u32 mmp_pad2; + __u32 mmp_pad2[226]; + __u32 mmp_checksum; /* crc32c(uuid+mmp_block) */ }; /* - * 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 + +/* + * Minimum size of inline data. + */ +#define EXT4_MIN_INLINE_DATA_SIZE ((sizeof(__u32) * EXT2_N_BLOCKS)) + +/* + * Size of a parent inode in inline data directory. + */ +#define EXT4_INLINE_DATA_DOTDOT_SIZE (4) + +#define EXT4_ENC_UTF8_12_1 1 + +#define EXT4_ENC_STRICT_MODE_FL (1 << 0) /* Reject invalid sequences */ #endif /* _LINUX_EXT2_FS_H */