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)
11 * linux/include/linux/minix_fs_sb.h
13 * Copyright (C) 1991, 1992 Linus Torvalds
20 #include <linux/timer.h>
21 #include <linux/wait.h>
22 #include <linux/blockgroup_lock.h>
23 #include <linux/percpu_counter.h>
25 #include <linux/rbtree.h>
28 * fourth extended-fs super-block data in memory
31 unsigned long s_desc_size
; /* Size of a group descriptor in bytes */
32 unsigned long s_inodes_per_block
;/* Number of inodes per block */
33 unsigned long s_blocks_per_group
;/* Number of blocks in a group */
34 unsigned long s_inodes_per_group
;/* Number of inodes in a group */
35 unsigned long s_itb_per_group
; /* Number of inode table blocks per group */
36 unsigned long s_gdb_count
; /* Number of group descriptor blocks */
37 unsigned long s_desc_per_block
; /* Number of group descriptors per block */
38 ext4_group_t s_groups_count
; /* Number of groups in the fs */
39 unsigned long s_overhead_last
; /* Last calculated overhead */
40 unsigned long s_blocks_last
; /* Last seen block count */
41 loff_t s_bitmap_maxbytes
; /* max bytes for bitmap files */
42 struct buffer_head
* s_sbh
; /* Buffer containing the super block */
43 struct ext4_super_block
* s_es
; /* Pointer to the super block in the buffer */
44 struct buffer_head
** s_group_desc
;
45 unsigned long s_mount_opt
;
46 ext4_fsblk_t s_sb_block
;
49 unsigned short s_mount_state
;
51 int s_addr_per_block_bits
;
52 int s_desc_per_block_bits
;
55 spinlock_t s_next_gen_lock
;
56 u32 s_next_generation
;
58 int s_def_hash_version
;
59 int s_hash_unsigned
; /* 3 if hash should be signed, 0 if not */
60 struct percpu_counter s_freeblocks_counter
;
61 struct percpu_counter s_freeinodes_counter
;
62 struct percpu_counter s_dirs_counter
;
63 struct percpu_counter s_dirtyblocks_counter
;
64 struct blockgroup_lock s_blockgroup_lock
;
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 ext4_reserve_window_node s_rsv_window_head
;
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_JBD2_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 */
82 char *s_qf_names
[MAXQUOTAS
]; /* Names of quota files with journalled quota */
83 int s_jquota_fmt
; /* Format of quota to use */
85 unsigned int s_want_extra_isize
; /* New inodes should reserve # bytes */
88 /* ext4 extents stats */
89 unsigned long s_ext_min
;
90 unsigned long s_ext_max
;
91 unsigned long s_depth_max
;
92 spinlock_t s_ext_stats_lock
;
93 unsigned long s_ext_blocks
;
94 unsigned long s_ext_extents
;
97 /* for buddy allocator */
98 struct ext4_group_info
***s_group_info
;
99 struct inode
*s_buddy_cache
;
100 long s_blocks_reserved
;
101 spinlock_t s_reserve_lock
;
102 struct list_head s_active_transaction
;
103 struct list_head s_closed_transaction
;
104 struct list_head s_committed_transaction
;
105 spinlock_t s_md_lock
;
106 tid_t s_last_transaction
;
107 unsigned short *s_mb_offsets
;
108 unsigned int *s_mb_maxs
;
111 unsigned long s_stripe
;
112 unsigned long s_mb_stream_request
;
113 unsigned long s_mb_max_to_scan
;
114 unsigned long s_mb_min_to_scan
;
115 unsigned long s_mb_stats
;
116 unsigned long s_mb_order2_reqs
;
117 unsigned long s_mb_group_prealloc
;
118 /* where last allocation was done - for stream allocation */
119 unsigned long s_mb_last_group
;
120 unsigned long s_mb_last_start
;
122 /* history to debug policy */
123 struct ext4_mb_history
*s_mb_history
;
124 int s_mb_history_cur
;
125 int s_mb_history_max
;
126 int s_mb_history_num
;
127 struct proc_dir_entry
*s_mb_proc
;
128 spinlock_t s_mb_history_lock
;
129 int s_mb_history_filter
;
131 /* stats for buddy allocator */
132 spinlock_t s_mb_pa_lock
;
133 atomic_t s_bal_reqs
; /* number of reqs with len > 1 */
134 atomic_t s_bal_success
; /* we found long enough chunks */
135 atomic_t s_bal_allocated
; /* in blocks */
136 atomic_t s_bal_ex_scanned
; /* total extents scanned */
137 atomic_t s_bal_goals
; /* goal hits */
138 atomic_t s_bal_breaks
; /* too long searches */
139 atomic_t s_bal_2orders
; /* 2^order hits */
140 spinlock_t s_bal_lock
;
141 unsigned long s_mb_buddies_generated
;
142 unsigned long long s_mb_generation_time
;
143 atomic_t s_mb_lost_chunks
;
144 atomic_t s_mb_preallocated
;
145 atomic_t s_mb_discarded
;
147 /* locality groups */
148 struct ext4_locality_group
*s_locality_groups
;
150 unsigned int s_log_groups_per_flex
;
151 struct flex_groups
*s_flex_groups
;
154 #endif /* _EXT4_SB */