/* * * Copyright (c) International Business Machines Corp., 2000 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See * the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Module: fsimext2.h * */ /* If EVMS_ABI_CODE is not defined, default to EVMS ABI 1.2 */ #ifndef EVMS_ABI_CODE #define EVMS_ABI_CODE 120 #endif /* * EVMS 1.0 backwards compatibility functions */ #if (EVMS_ABI_CODE == 100) #define EVMS_IS_MOUNTED(vol) ((vol)->mount_point != 0) #define EVMS_GET_DEVNAME(vol) ((vol)->name) #else #define EVMS_IS_MOUNTED(vol) (EngFncs->is_mounted((vol)->dev_node, NULL)) #define EVMS_GET_DEVNAME(vol) ((vol)->dev_node) #endif /******************** ******************** ** ** ** EVMS defines ** ** ** ******************** ********************/ extern plugin_record_t ext2_plugrec; engine_functions_t *EngFncs; /* file system type ... used by the SetPluginID macro */ #define FS_TYPE_EXT2 7 /* logging macros */ #define MESSAGE(msg, args...) EngFncs->user_message(pMyPluginRecord, NULL, NULL, msg, ##args) #define LOGENTRY() EngFncs->write_log_entry(ENTRY_EXIT, pMyPluginRecord, "%s: Enter.\n", __FUNCTION__ ) #define LOGEXIT() EngFncs->write_log_entry(ENTRY_EXIT, pMyPluginRecord, "%s: Exit.\n", __FUNCTION__ ) #define LOGEXITRC() EngFncs->write_log_entry(ENTRY_EXIT, pMyPluginRecord, "%s: Exit. RC= %d.\n", __FUNCTION__ , rc) #define LOG_CRITICAL(msg, args...) EngFncs->write_log_entry(CRITICAL, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args) #define LOG_SERIOUS(msg, args...) EngFncs->write_log_entry(SERIOUS, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args) #define LOG_ERROR(msg, args...) EngFncs->write_log_entry(ERROR, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args) #define LOG_WARNING(msg, args...) EngFncs->write_log_entry(WARNING, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args) #define LOG(msg, args...) EngFncs->write_log_entry(DEFAULT, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args) #define LOG_DETAILS(msg, args...) EngFncs->write_log_entry(DETAILS, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args) #define LOG_DEBUG(msg, args...) EngFncs->write_log_entry(DEBUG, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args) #define LOG_EXTRA(msg, args...) EngFncs->write_log_entry(EXTRA, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args) /* useful macro for option code */ #define SET_STRING_FIELD(a,b)\ a = EngFncs->engine_alloc( strlen(b)+1 );\ if (a ) {\ strcpy(a, b);\ }\ else {\ return -ENOMEM;\ } #define SET_STRING(a,b) a = EngFncs->engine_alloc( strlen(b)+1 );if (a ) { strcpy(a, b); } else { rc = ENOMEM; LOG_EXIT(rc);} #define LOG_EXIT(x) LOG_PROC("Exiting: rc = %d\n", x) #define LOG_PROC(msg, args...) EngFncs->write_log_entry(ENTRY_EXIT, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args) /********************************** ********************************** ** ** ** fsck.jfs, mkfs.jfs defines ** ** ** ********************************** **********************************/ /* fsck.jfs, mkfs.jfs option counts */ /* fsck.jfs option array indices */ #define FSCK_FORCE_INDEX 0 #define FSCK_READONLY_INDEX 1 #define FSCK_CHECKBB_INDEX 2 #define FSCK_CHECKRW_INDEX 3 #define FSCK_TIMING_INDEX 4 #define FSCK_EXT2_OPTIONS_COUNT 5 /* mkfs.jfs option array indices */ #define MKFS_CHECKBB_INDEX 0 #define MKFS_CHECKRW_INDEX 1 #define MKFS_SETVOL_INDEX 2 #define MKFS_JOURNAL_INDEX 3 #define MKFS_EXT2_OPTIONS_COUNT 4 /* fsck exit codes */ #define FSCK_OK 0 #define FSCK_CORRECTED 1 #define FSCK_REBOOT 2 #define FSCK_ERRORS_UNCORRECTED 4 #define FSCK_OP_ERROR 8 #define FSCK_USAGE_ERROR 16 /* * EXT2/3 defines and structs */ /* generic defines */ #define FSIM_SUCCESS 0 #define FSIM_ERROR -1 #define GET 0 #define PUT 1 #define EXT2_SUPER_LOC 1024 #define EXT2_SUPER_MAGIC 0xEF53 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ #define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */ #define EXT2_ERROR_FS 0x0002 /* Errors detected */ /* * Structure of the ext2 super block */ struct ext2_super_block { u_int32_t s_inodes_count; /* Inodes count */ u_int32_t s_blocks_count; /* Blocks count */ u_int32_t s_r_blocks_count; /* Reserved blocks count */ u_int32_t s_free_blocks_count; /* Free blocks count */ u_int32_t s_free_inodes_count; /* Free inodes count */ u_int32_t s_first_data_block; /* First Data Block */ u_int32_t s_log_block_size; /* Block size */ int32_t s_log_frag_size; /* Fragment size */ u_int32_t s_blocks_per_group; /* # Blocks per group */ u_int32_t s_frags_per_group; /* # Fragments per group */ u_int32_t s_inodes_per_group; /* # Inodes per group */ u_int32_t s_mtime; /* Mount time */ u_int32_t s_wtime; /* Write time */ u_int16_t s_mnt_count; /* Mount count */ int16_t s_max_mnt_count; /* Maximal mount count */ u_int16_t s_magic; /* Magic signature */ u_int16_t s_state; /* File system state */ u_int16_t s_errors; /* Behaviour when detecting errors */ u_int16_t s_minor_rev_level; /* minor revision level */ u_int32_t s_lastcheck; /* time of last check */ u_int32_t s_checkinterval; /* max. time between checks */ u_int32_t s_creator_os; /* OS */ u_int32_t s_rev_level; /* Revision level */ u_int16_t s_def_resuid; /* Default uid for reserved blocks */ u_int16_t s_def_resgid; /* Default gid for reserved blocks */ /* * These fields are for EXT2_DYNAMIC_REV superblocks only. * * Note: the difference between the compatible feature set and * the incompatible feature set is that if there is a bit set * in the incompatible feature set that the kernel doesn't * know about, it should refuse to mount the filesystem. * * e2fsck's requirements are more strict; if it doesn't know * about a feature in either the compatible or incompatible * feature set, it must abort and not try to meddle with * things it doesn't understand... */ u_int32_t s_first_ino; /* First non-reserved inode */ u_int16_t s_inode_size; /* size of inode structure */ u_int16_t s_block_group_nr; /* block group # of this superblock */ u_int32_t s_feature_compat; /* compatible feature set */ u_int32_t s_feature_incompat; /* incompatible feature set */ u_int32_t s_feature_ro_compat; /* readonly-compatible feature set */ u_int8_t s_uuid[16]; /* 128-bit uuid for volume */ int8_t s_volume_name[16]; /* volume name */ int8_t s_last_mounted[64]; /* directory where last mounted */ u_int32_t s_algorithm_usage_bitmap; /* For compression */ /* * Performance hints. Directory preallocation should only * happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on. */ u_int8_t s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ u_int8_t s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ u_int16_t s_padding1; /* * Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set. */ u_int8_t s_journal_uuid[16]; /* uuid of journal superblock */ u_int32_t s_journal_inum; /* inode number of journal file */ u_int32_t s_journal_dev; /* device number of journal file */ u_int32_t s_last_orphan; /* start of list of inodes to delete */ u_int32_t s_reserved[197]; /* Padding to the end of the block */ }; #define L2MEGABYTE 20 #define MEGABYTE (1 << L2MEGABYTE) #define MEGABYTE32 (MEGABYTE << 5) #define MAX_LOG_PERCENTAGE 10 /* Log can be at most 10% of disk */ /* * buffer cache configuration */ /* page size */ #ifdef PSIZE #undef PSIZE #endif #define PSIZE 4096 /* page size (in byte) */ #define PBSIZE 512 /* physical block size (in byte) */ /* * Minimum number of bytes supported for an ext2 partition * (64k, quite small!) */ #define MINEXT2 (64*1024) /* * SIZE_OF_SUPER defines the total amount of space reserved on disk for the * superblock. This is not the same as the superblock structure, since all of * this space is not currently being used. */ #define SIZE_OF_SUPER sizeof(struct ext2_super_block) /* * SIZE_OF_MAP_PAGE defines the amount of disk space reserved for each page of * the inode allocation map (to hold iag) */ #define SIZE_OF_MAP_PAGE PSIZE /* * directory configuration */ #define JFS_NAME_MAX 255 #define JFS_PATH_MAX BPSIZE /* * file system state (superblock state) */ #define FM_CLEAN 0x00000000 /* file system is unmounted and clean */ #define FM_MOUNT 0x00000001 /* file system is mounted cleanly */ #define FM_DIRTY 0x00000002 /* file system was not unmounted and clean * when mounted or * commit failure occurred while being mounted: * fsck() must be run to repair */ #define FM_LOGREDO 0x00000004 /* log based recovery (logredo()) failed: * fsck() must be run to repair */ #define FM_EXTENDFS 0x00000008 /* file system extendfs() in progress */ /******************* ******************* ** ** ** Common code ** ** ** ******************* *******************/ int fsim_get_ext2_superblock( logical_volume_t *, struct ext2_super_block * ); int fsim_unmkfs( logical_volume_t * ); int fsim_mkfs( logical_volume_t *, option_array_t * ); int fsim_fsck( logical_volume_t *, option_array_t *, int * ); int fsim_get_volume_limits( struct ext2_super_block *, sector_count_t *, sector_count_t *, sector_count_t * ); int fsim_test_version( void );