mirror of https://github.com/vitalif/e2fsprogs
277 lines
10 KiB
C
277 lines
10 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2000
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Module: fsimext2.h
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*
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*/
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/* If EVMS_ABI_CODE is not defined, default to EVMS ABI 1.2 */
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#ifndef EVMS_ABI_CODE
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#define EVMS_ABI_CODE 120
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#endif
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/*
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* EVMS 1.0 backwards compatibility functions
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*/
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#if (EVMS_ABI_CODE == 100)
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#define EVMS_IS_MOUNTED(vol) ((vol)->mount_point != 0)
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#define EVMS_GET_DEVNAME(vol) ((vol)->name)
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#else
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#define EVMS_IS_MOUNTED(vol) (EngFncs->is_mounted((vol)->dev_node, NULL))
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#define EVMS_GET_DEVNAME(vol) ((vol)->dev_node)
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#endif
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/********************
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********************
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** **
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** EVMS defines **
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** **
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********************
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********************/
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extern plugin_record_t ext2_plugrec;
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engine_functions_t *EngFncs;
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/* file system type ... used by the SetPluginID macro */
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#define FS_TYPE_EXT2 7
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/* logging macros */
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#define MESSAGE(msg, args...) EngFncs->user_message(pMyPluginRecord, NULL, NULL, msg, ##args)
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#define LOGENTRY() EngFncs->write_log_entry(ENTRY_EXIT, pMyPluginRecord, "%s: Enter.\n", __FUNCTION__ )
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#define LOGEXIT() EngFncs->write_log_entry(ENTRY_EXIT, pMyPluginRecord, "%s: Exit.\n", __FUNCTION__ )
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#define LOGEXITRC() EngFncs->write_log_entry(ENTRY_EXIT, pMyPluginRecord, "%s: Exit. rc = %d.\n", __FUNCTION__ , rc)
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#define LOG_CRITICAL(msg, args...) EngFncs->write_log_entry(CRITICAL, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args)
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#define LOG_SERIOUS(msg, args...) EngFncs->write_log_entry(SERIOUS, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args)
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#define LOG_ERROR(msg, args...) EngFncs->write_log_entry(ERROR, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args)
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#define LOG_WARNING(msg, args...) EngFncs->write_log_entry(WARNING, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args)
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#define LOG(msg, args...) EngFncs->write_log_entry(DEFAULT, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args)
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#define LOG_DETAILS(msg, args...) EngFncs->write_log_entry(DETAILS, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args)
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#define LOG_DEBUG(msg, args...) EngFncs->write_log_entry(DEBUG, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args)
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#define LOG_EXTRA(msg, args...) EngFncs->write_log_entry(EXTRA, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args)
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/* useful macro for option code */
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#define SET_STRING_FIELD(a,b)\
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a = EngFncs->engine_alloc( strlen(b)+1 );\
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if (a ) {\
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strcpy(a, b);\
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}\
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else {\
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return -ENOMEM;\
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}
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#define SET_STRING(a,b) a = EngFncs->engine_alloc( strlen(b)+1 );if (a ) { strcpy(a, b); } else { rc = ENOMEM; LOG_EXIT(rc);}
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#define LOG_EXIT(x) LOG_PROC("Exiting: rc = %d\n", x)
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#define LOG_PROC(msg, args...) EngFncs->write_log_entry(ENTRY_EXIT, pMyPluginRecord, "%s: " msg, __FUNCTION__ , ## args)
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/**********************************
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**********************************
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** **
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** fsck.jfs, mkfs.jfs defines **
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** **
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**********************************
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**********************************/
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/* fsck.jfs, mkfs.jfs option counts */
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/* fsck.jfs option array indices */
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#define FSCK_FORCE_INDEX 0
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#define FSCK_READONLY_INDEX 1
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#define FSCK_CHECKBB_INDEX 2
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#define FSCK_CHECKRW_INDEX 3
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#define FSCK_TIMING_INDEX 4
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#define FSCK_EXT2_OPTIONS_COUNT 5
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/* mkfs.jfs option array indices */
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#define MKFS_CHECKBB_INDEX 0
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#define MKFS_CHECKRW_INDEX 1
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#define MKFS_SETVOL_INDEX 2
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#define MKFS_JOURNAL_INDEX 3
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#define MKFS_EXT2_OPTIONS_COUNT 4
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/* fsck exit codes */
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#define FSCK_OK 0
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#define FSCK_CORRECTED 1
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#define FSCK_REBOOT 2
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#define FSCK_ERRORS_UNCORRECTED 4
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#define FSCK_OP_ERROR 8
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#define FSCK_USAGE_ERROR 16
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/*
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* EXT2/3 defines and structs
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*/
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/* generic defines */
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#define FSIM_SUCCESS 0
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#define FSIM_ERROR -1
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#define GET 0
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#define PUT 1
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#define EXT2_SUPER_LOC 1024
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#define EXT2_SUPER_MAGIC 0xEF53
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#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
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#define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */
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#define EXT2_ERROR_FS 0x0002 /* Errors detected */
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/*
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* Structure of the ext2 super block
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*/
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struct ext2_super_block {
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u_int32_t s_inodes_count; /* Inodes count */
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u_int32_t s_blocks_count; /* Blocks count */
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u_int32_t s_r_blocks_count; /* Reserved blocks count */
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u_int32_t s_free_blocks_count; /* Free blocks count */
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u_int32_t s_free_inodes_count; /* Free inodes count */
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u_int32_t s_first_data_block; /* First Data Block */
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u_int32_t s_log_block_size; /* Block size */
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int32_t s_log_frag_size; /* Fragment size */
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u_int32_t s_blocks_per_group; /* # Blocks per group */
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u_int32_t s_frags_per_group; /* # Fragments per group */
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u_int32_t s_inodes_per_group; /* # Inodes per group */
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u_int32_t s_mtime; /* Mount time */
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u_int32_t s_wtime; /* Write time */
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u_int16_t s_mnt_count; /* Mount count */
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int16_t s_max_mnt_count; /* Maximal mount count */
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u_int16_t s_magic; /* Magic signature */
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u_int16_t s_state; /* File system state */
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u_int16_t s_errors; /* Behaviour when detecting errors */
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u_int16_t s_minor_rev_level; /* minor revision level */
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u_int32_t s_lastcheck; /* time of last check */
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u_int32_t s_checkinterval; /* max. time between checks */
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u_int32_t s_creator_os; /* OS */
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u_int32_t s_rev_level; /* Revision level */
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u_int16_t s_def_resuid; /* Default uid for reserved blocks */
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u_int16_t s_def_resgid; /* Default gid for reserved blocks */
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/*
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* These fields are for EXT2_DYNAMIC_REV superblocks only.
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*
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* Note: the difference between the compatible feature set and
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* the incompatible feature set is that if there is a bit set
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* in the incompatible feature set that the kernel doesn't
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* know about, it should refuse to mount the filesystem.
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*
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* e2fsck's requirements are more strict; if it doesn't know
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* about a feature in either the compatible or incompatible
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* feature set, it must abort and not try to meddle with
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* things it doesn't understand...
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*/
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u_int32_t s_first_ino; /* First non-reserved inode */
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u_int16_t s_inode_size; /* size of inode structure */
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u_int16_t s_block_group_nr; /* block group # of this superblock */
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u_int32_t s_feature_compat; /* compatible feature set */
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u_int32_t s_feature_incompat; /* incompatible feature set */
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u_int32_t s_feature_ro_compat; /* readonly-compatible feature set */
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u_int8_t s_uuid[16]; /* 128-bit uuid for volume */
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int8_t s_volume_name[16]; /* volume name */
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int8_t s_last_mounted[64]; /* directory where last mounted */
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u_int32_t s_algorithm_usage_bitmap; /* For compression */
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/*
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* Performance hints. Directory preallocation should only
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* happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on.
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*/
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u_int8_t s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
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u_int8_t s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
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u_int16_t s_padding1;
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/*
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* Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set.
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*/
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u_int8_t s_journal_uuid[16]; /* uuid of journal superblock */
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u_int32_t s_journal_inum; /* inode number of journal file */
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u_int32_t s_journal_dev; /* device number of journal file */
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u_int32_t s_last_orphan; /* start of list of inodes to delete */
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u_int32_t s_reserved[197]; /* Padding to the end of the block */
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};
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#define L2MEGABYTE 20
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#define MEGABYTE (1 << L2MEGABYTE)
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#define MEGABYTE32 (MEGABYTE << 5)
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#define MAX_LOG_PERCENTAGE 10 /* Log can be at most 10% of disk */
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/*
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* buffer cache configuration
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*/
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/* page size */
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#ifdef PSIZE
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#undef PSIZE
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#endif
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#define PSIZE 4096 /* page size (in byte) */
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#define PBSIZE 512 /* physical block size (in byte) */
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/*
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* Minimum number of bytes supported for an ext2 partition
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* (64k, quite small!)
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*/
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#define MINEXT2 (64*1024)
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/*
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* SIZE_OF_SUPER defines the total amount of space reserved on disk for the
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* superblock. This is not the same as the superblock structure, since all of
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* this space is not currently being used.
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*/
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#define SIZE_OF_SUPER sizeof(struct ext2_super_block)
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/*
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* SIZE_OF_MAP_PAGE defines the amount of disk space reserved for each page of
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* the inode allocation map (to hold iag)
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*/
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#define SIZE_OF_MAP_PAGE PSIZE
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/*
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* directory configuration
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*/
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#define JFS_NAME_MAX 255
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#define JFS_PATH_MAX BPSIZE
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/*
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* file system state (superblock state)
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*/
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#define FM_CLEAN 0x00000000 /* file system is unmounted and clean */
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#define FM_MOUNT 0x00000001 /* file system is mounted cleanly */
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#define FM_DIRTY 0x00000002 /* file system was not unmounted and clean
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* when mounted or
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* commit failure occurred while being mounted:
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* fsck() must be run to repair
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*/
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#define FM_LOGREDO 0x00000004 /* log based recovery (logredo()) failed:
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* fsck() must be run to repair
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*/
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#define FM_EXTENDFS 0x00000008 /* file system extendfs() in progress */
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/*******************
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*******************
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** **
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** Common code **
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** **
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*******************
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*******************/
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int fsim_get_ext2_superblock( logical_volume_t *, struct ext2_super_block * );
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int fsim_unmkfs( logical_volume_t * );
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int fsim_mkfs( logical_volume_t *, option_array_t * );
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int fsim_fsck( logical_volume_t *, option_array_t *, int * );
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int fsim_get_volume_limits( struct ext2_super_block *, sector_count_t *,
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sector_count_t *, sector_count_t * );
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int fsim_test_version( void );
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