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1275 |
phoenix |
/*
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* linux/include/linux/ext3_fs_sb.h
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*
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* Copyright (C) 1992, 1993, 1994, 1995
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* Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*
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* from
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*
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* linux/include/linux/minix_fs_sb.h
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*/
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#ifndef _LINUX_EXT3_FS_SB
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#define _LINUX_EXT3_FS_SB
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#ifdef __KERNEL__
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#include <linux/timer.h>
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#include <linux/wait.h>
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#endif
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/*
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* The following is not needed anymore since the descriptors buffer
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* heads are now dynamically allocated
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*/
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/* #define EXT3_MAX_GROUP_DESC 8 */
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#define EXT3_MAX_GROUP_LOADED 8
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/*
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* third extended-fs super-block data in memory
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*/
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struct ext3_sb_info {
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unsigned long s_frag_size; /* Size of a fragment in bytes */
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unsigned long s_frags_per_block;/* Number of fragments per block */
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unsigned long s_inodes_per_block;/* Number of inodes per block */
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unsigned long s_frags_per_group;/* Number of fragments in a group */
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unsigned long s_blocks_per_group;/* Number of blocks in a group */
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unsigned long s_inodes_per_group;/* Number of inodes in a group */
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unsigned long s_itb_per_group; /* Number of inode table blocks per group */
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unsigned long s_gdb_count; /* Number of group descriptor blocks */
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unsigned long s_desc_per_block; /* Number of group descriptors per block */
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unsigned long s_groups_count; /* Number of groups in the fs */
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struct buffer_head * s_sbh; /* Buffer containing the super block */
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struct ext3_super_block * s_es; /* Pointer to the super block in the buffer */
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struct buffer_head ** s_group_desc;
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unsigned short s_loaded_inode_bitmaps;
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unsigned short s_loaded_block_bitmaps;
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unsigned long s_inode_bitmap_number[EXT3_MAX_GROUP_LOADED];
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struct buffer_head * s_inode_bitmap[EXT3_MAX_GROUP_LOADED];
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unsigned long s_block_bitmap_number[EXT3_MAX_GROUP_LOADED];
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struct buffer_head * s_block_bitmap[EXT3_MAX_GROUP_LOADED];
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unsigned long s_mount_opt;
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uid_t s_resuid;
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gid_t s_resgid;
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unsigned short s_mount_state;
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unsigned short s_pad;
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int s_addr_per_block_bits;
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int s_desc_per_block_bits;
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int s_inode_size;
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int s_first_ino;
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u32 s_next_generation;
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/* Journaling */
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struct inode * s_journal_inode;
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struct journal_s * s_journal;
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struct list_head s_orphan;
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unsigned long s_commit_interval;
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struct block_device *journal_bdev;
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#ifdef CONFIG_JBD_DEBUG
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struct timer_list turn_ro_timer; /* For turning read-only (crash simulation) */
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wait_queue_head_t ro_wait_queue; /* For people waiting for the fs to go read-only */
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#endif
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};
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#endif /* _LINUX_EXT3_FS_SB */
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