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include/linux/ext3_fs_sb.h
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/* * linux/include/linux/ext3_fs_sb.h * * Copyright (C) 1992, 1993, 1994, 1995 * Remy Card (card@masi.ibp.fr) * Laboratoire MASI - Institut Blaise Pascal * Universite Pierre et Marie Curie (Paris VI) * * from * * linux/include/linux/minix_fs_sb.h * * Copyright (C) 1991, 1992 Linus Torvalds */ #ifndef _LINUX_EXT3_FS_SB #define _LINUX_EXT3_FS_SB #ifdef __KERNEL__ #include <linux/timer.h> #include <linux/wait.h> #include <linux/blockgroup_lock.h> #include <linux/percpu_counter.h> #endif #include <linux/rbtree.h> /* * third extended-fs super-block data in memory */ struct ext3_sb_info { unsigned long s_frag_size; /* Size of a fragment in bytes */ unsigned long s_frags_per_block;/* Number of fragments per block */ unsigned long s_inodes_per_block;/* Number of inodes per block */ unsigned long s_frags_per_group;/* Number of fragments in a group */ unsigned long s_blocks_per_group;/* Number of blocks in a group */ unsigned long s_inodes_per_group;/* Number of inodes in a group */ unsigned long s_itb_per_group; /* Number of inode table blocks per group */ unsigned long s_gdb_count; /* Number of group descriptor blocks */ unsigned long s_desc_per_block; /* Number of group descriptors per block */ unsigned long s_groups_count; /* Number of groups in the fs */ |
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unsigned long s_overhead_last; /* Last calculated overhead */ unsigned long s_blocks_last; /* Last seen block count */ |
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struct buffer_head * s_sbh; /* Buffer containing the super block */ struct ext3_super_block * s_es; /* Pointer to the super block in the buffer */ struct buffer_head ** s_group_desc; unsigned long s_mount_opt; |
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ext3_fsblk_t s_sb_block; |
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uid_t s_resuid; gid_t s_resgid; unsigned short s_mount_state; unsigned short s_pad; int s_addr_per_block_bits; int s_desc_per_block_bits; int s_inode_size; int s_first_ino; spinlock_t s_next_gen_lock; u32 s_next_generation; u32 s_hash_seed[4]; int s_def_hash_version; |
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int s_hash_unsigned; /* 3 if hash should be signed, 0 if not */ |
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struct percpu_counter s_freeblocks_counter; struct percpu_counter s_freeinodes_counter; struct percpu_counter s_dirs_counter; |
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struct blockgroup_lock *s_blockgroup_lock; |
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/* root of the per fs reservation window tree */ spinlock_t s_rsv_window_lock; struct rb_root s_rsv_window_root; struct ext3_reserve_window_node s_rsv_window_head; /* Journaling */ struct inode * s_journal_inode; struct journal_s * s_journal; struct list_head s_orphan; |
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struct mutex s_orphan_lock; |
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struct mutex s_resize_lock; |
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unsigned long s_commit_interval; struct block_device *journal_bdev; #ifdef CONFIG_JBD_DEBUG struct timer_list turn_ro_timer; /* For turning read-only (crash simulation) */ wait_queue_head_t ro_wait_queue; /* For people waiting for the fs to go read-only */ #endif #ifdef CONFIG_QUOTA char *s_qf_names[MAXQUOTAS]; /* Names of quota files with journalled quota */ int s_jquota_fmt; /* Format of quota to use */ #endif }; |
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static inline spinlock_t * sb_bgl_lock(struct ext3_sb_info *sbi, unsigned int block_group) { |
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return bgl_lock_ptr(sbi->s_blockgroup_lock, block_group); |
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} |
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#endif /* _LINUX_EXT3_FS_SB */ |