1 /* 2 * linux/include/linux/ext3_fs_sb.h 3 * 4 * Copyright (C) 1992, 1993, 1994, 1995 5 * Remy Card (card@masi.ibp.fr) 6 * Laboratoire MASI - Institut Blaise Pascal 7 * Universite Pierre et Marie Curie (Paris VI) 8 * 9 * from 10 * 11 * linux/include/linux/minix_fs_sb.h 12 * 13 * Copyright (C) 1991, 1992 Linus Torvalds 14 */ 15 16 #ifndef _LINUX_EXT3_FS_SB 17 #define _LINUX_EXT3_FS_SB 18 19 #ifdef __KERNEL__ 20 #include <linux/timer.h> 21 #include <linux/wait.h> 22 #include <linux/blockgroup_lock.h> 23 #include <linux/percpu_counter.h> 24 #endif 25 #include <linux/rbtree.h> 26 27 /* 28 * third extended-fs super-block data in memory 29 */ 30 struct ext3_sb_info { 31 unsigned long s_frag_size; /* Size of a fragment in bytes */ 32 unsigned long s_frags_per_block;/* Number of fragments per block */ 33 unsigned long s_inodes_per_block;/* Number of inodes per block */ 34 unsigned long s_frags_per_group;/* Number of fragments in a group */ 35 unsigned long s_blocks_per_group;/* Number of blocks in a group */ 36 unsigned long s_inodes_per_group;/* Number of inodes in a group */ 37 unsigned long s_itb_per_group; /* Number of inode table blocks per group */ 38 unsigned long s_gdb_count; /* Number of group descriptor blocks */ 39 unsigned long s_desc_per_block; /* Number of group descriptors per block */ 40 unsigned long s_groups_count; /* Number of groups in the fs */ 41 unsigned long s_overhead_last; /* Last calculated overhead */ 42 unsigned long s_blocks_last; /* Last seen block count */ 43 struct buffer_head * s_sbh; /* Buffer containing the super block */ 44 struct ext3_super_block * s_es; /* Pointer to the super block in the buffer */ 45 struct buffer_head ** s_group_desc; 46 unsigned long s_mount_opt; 47 ext3_fsblk_t s_sb_block; 48 uid_t s_resuid; 49 gid_t s_resgid; 50 unsigned short s_mount_state; 51 unsigned short s_pad; 52 int s_addr_per_block_bits; 53 int s_desc_per_block_bits; 54 int s_inode_size; 55 int s_first_ino; 56 spinlock_t s_next_gen_lock; 57 u32 s_next_generation; 58 u32 s_hash_seed[4]; 59 int s_def_hash_version; 60 int s_hash_unsigned; /* 3 if hash should be signed, 0 if not */ 61 struct percpu_counter s_freeblocks_counter; 62 struct percpu_counter s_freeinodes_counter; 63 struct percpu_counter s_dirs_counter; 64 struct blockgroup_lock *s_blockgroup_lock; 65 66 /* root of the per fs reservation window tree */ 67 spinlock_t s_rsv_window_lock; 68 struct rb_root s_rsv_window_root; 69 struct ext3_reserve_window_node s_rsv_window_head; 70 71 /* Journaling */ 72 struct inode * s_journal_inode; 73 struct journal_s * s_journal; 74 struct list_head s_orphan; 75 unsigned long s_commit_interval; 76 struct block_device *journal_bdev; 77 #ifdef CONFIG_JBD_DEBUG 78 struct timer_list turn_ro_timer; /* For turning read-only (crash simulation) */ 79 wait_queue_head_t ro_wait_queue; /* For people waiting for the fs to go read-only */ 80 #endif 81 #ifdef CONFIG_QUOTA 82 char *s_qf_names[MAXQUOTAS]; /* Names of quota files with journalled quota */ 83 int s_jquota_fmt; /* Format of quota to use */ 84 #endif 85 }; 86 87 static inline spinlock_t * sb_bgl_lock(struct ext3_sb_info * sbi,unsigned int block_group)88sb_bgl_lock(struct ext3_sb_info *sbi, unsigned int block_group) 89 { 90 return bgl_lock_ptr(sbi->s_blockgroup_lock, block_group); 91 } 92 93 #endif /* _LINUX_EXT3_FS_SB */ 94