Commit | Line | Data |
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ac27a0ec | 1 | /* |
3dcf5451 | 2 | * ext4_sb.h |
ac27a0ec DK |
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 | ||
3dcf5451 CH |
16 | #ifndef _EXT4_SB |
17 | #define _EXT4_SB | |
ac27a0ec DK |
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 | /* | |
8a35694e | 28 | * fourth extended-fs super-block data in memory |
ac27a0ec | 29 | */ |
617ba13b | 30 | struct ext4_sb_info { |
0d1ee42f | 31 | unsigned long s_desc_size; /* Size of a group descriptor in bytes */ |
ac27a0ec | 32 | unsigned long s_inodes_per_block;/* Number of inodes per block */ |
ac27a0ec DK |
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 */ | |
fd2d4291 | 38 | ext4_group_t s_groups_count; /* Number of groups in the fs */ |
5e70030d BP |
39 | unsigned long s_overhead_last; /* Last calculated overhead */ |
40 | unsigned long s_blocks_last; /* Last seen block count */ | |
e2b46574 | 41 | loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */ |
ac27a0ec | 42 | struct buffer_head * s_sbh; /* Buffer containing the super block */ |
af5bc92d TT |
43 | struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */ |
44 | struct buffer_head **s_group_desc; | |
ac27a0ec | 45 | unsigned long s_mount_opt; |
d9c9bef1 | 46 | ext4_fsblk_t s_sb_block; |
ac27a0ec DK |
47 | uid_t s_resuid; |
48 | gid_t s_resgid; | |
49 | unsigned short s_mount_state; | |
50 | unsigned short s_pad; | |
51 | int s_addr_per_block_bits; | |
52 | int s_desc_per_block_bits; | |
53 | int s_inode_size; | |
54 | int s_first_ino; | |
55 | spinlock_t s_next_gen_lock; | |
56 | u32 s_next_generation; | |
57 | u32 s_hash_seed[4]; | |
58 | int s_def_hash_version; | |
59 | struct percpu_counter s_freeblocks_counter; | |
60 | struct percpu_counter s_freeinodes_counter; | |
61 | struct percpu_counter s_dirs_counter; | |
6bc6e63f | 62 | struct percpu_counter s_dirtyblocks_counter; |
ac27a0ec | 63 | struct blockgroup_lock s_blockgroup_lock; |
9f6200bb | 64 | struct proc_dir_entry *s_proc; |
ac27a0ec DK |
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; | |
617ba13b | 69 | struct ext4_reserve_window_node s_rsv_window_head; |
ac27a0ec DK |
70 | |
71 | /* Journaling */ | |
af5bc92d TT |
72 | struct inode *s_journal_inode; |
73 | struct journal_s *s_journal; | |
ac27a0ec DK |
74 | struct list_head s_orphan; |
75 | unsigned long s_commit_interval; | |
76 | struct block_device *journal_bdev; | |
e23291b9 | 77 | #ifdef CONFIG_JBD2_DEBUG |
ac27a0ec DK |
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 | |
ef7f3835 | 85 | unsigned int s_want_extra_isize; /* New inodes should reserve # bytes */ |
a86c6181 AT |
86 | |
87 | #ifdef EXTENTS_STATS | |
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; | |
95 | #endif | |
c9de560d AT |
96 | |
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, *s_mb_maxs; | |
108 | ||
109 | /* tunables */ | |
110 | unsigned long s_stripe; | |
111 | unsigned long s_mb_stream_request; | |
112 | unsigned long s_mb_max_to_scan; | |
113 | unsigned long s_mb_min_to_scan; | |
114 | unsigned long s_mb_stats; | |
115 | unsigned long s_mb_order2_reqs; | |
116 | unsigned long s_mb_group_prealloc; | |
117 | /* where last allocation was done - for stream allocation */ | |
118 | unsigned long s_mb_last_group; | |
119 | unsigned long s_mb_last_start; | |
120 | ||
121 | /* history to debug policy */ | |
122 | struct ext4_mb_history *s_mb_history; | |
123 | int s_mb_history_cur; | |
124 | int s_mb_history_max; | |
125 | int s_mb_history_num; | |
c9de560d AT |
126 | spinlock_t s_mb_history_lock; |
127 | int s_mb_history_filter; | |
128 | ||
129 | /* stats for buddy allocator */ | |
130 | spinlock_t s_mb_pa_lock; | |
131 | atomic_t s_bal_reqs; /* number of reqs with len > 1 */ | |
132 | atomic_t s_bal_success; /* we found long enough chunks */ | |
133 | atomic_t s_bal_allocated; /* in blocks */ | |
134 | atomic_t s_bal_ex_scanned; /* total extents scanned */ | |
135 | atomic_t s_bal_goals; /* goal hits */ | |
136 | atomic_t s_bal_breaks; /* too long searches */ | |
137 | atomic_t s_bal_2orders; /* 2^order hits */ | |
138 | spinlock_t s_bal_lock; | |
139 | unsigned long s_mb_buddies_generated; | |
140 | unsigned long long s_mb_generation_time; | |
141 | atomic_t s_mb_lost_chunks; | |
142 | atomic_t s_mb_preallocated; | |
143 | atomic_t s_mb_discarded; | |
144 | ||
145 | /* locality groups */ | |
146 | struct ext4_locality_group *s_locality_groups; | |
772cb7c8 JS |
147 | |
148 | unsigned int s_log_groups_per_flex; | |
149 | struct flex_groups *s_flex_groups; | |
ac27a0ec DK |
150 | }; |
151 | ||
3dcf5451 | 152 | #endif /* _EXT4_SB */ |