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gerrit-public.fairphone.software / kernel / msm-4.19 / 9f6200bbfc962d8f926278cf5d5ddb90a228c322 / . / fs / ext4 / ext4_sb.h
blob: 95e046e77cb13739c9275e5b5072131fefe3c42a [file] [log] [blame]
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]1/*
Christoph Hellwig3dcf5452008-04-29 18:13:32 -0400[diff] [blame]2 * ext4_sb.h
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]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
Christoph Hellwig3dcf5452008-04-29 18:13:32 -0400[diff] [blame]16#ifndef _EXT4_SB
17#define _EXT4_SB
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]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/*
Shen Feng8a356942008-07-11 19:27:31 -0400[diff] [blame]28 * fourth extended-fs super-block data in memory
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]29 */
Mingming Cao617ba132006-10-11 01:20:53 -0700[diff] [blame]30struct ext4_sb_info {
Alexandre Ratchov0d1ee422006-10-11 01:21:14 -0700[diff] [blame]31 unsigned long s_desc_size; /* Size of a group descriptor in bytes */
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]32 unsigned long s_inodes_per_block;/* Number of inodes per block */
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]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 */
Avantika Mathurfd2d4292008-01-28 23:58:27 -0500[diff] [blame]38 ext4_group_t s_groups_count; /* Number of groups in the fs */
Badari Pulavarty5e700302007-07-15 23:42:00 -0700[diff] [blame]39 unsigned long s_overhead_last; /* Last calculated overhead */
40 unsigned long s_blocks_last; /* Last seen block count */
Eric Sandeene2b46572008-01-28 23:58:27 -0500[diff] [blame]41 loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]42 struct buffer_head * s_sbh; /* Buffer containing the super block */
Theodore Ts'oaf5bc922008-09-08 22:25:24 -0400[diff] [blame]43 struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */
44 struct buffer_head **s_group_desc;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]45 unsigned long s_mount_opt;
Miklos Szeredid9c9bef12007-10-16 23:26:27 -0700[diff] [blame]46 ext4_fsblk_t s_sb_block;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]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;
Aneesh Kumar K.V6bc6e632008-10-10 09:39:00 -0400[diff] [blame]62 struct percpu_counter s_dirtyblocks_counter;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]63 struct blockgroup_lock s_blockgroup_lock;
Theodore Ts'o9f6200b2008-09-23 09:18:24 -0400[diff] [blame^]64 struct proc_dir_entry *s_proc;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]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;
Mingming Cao617ba132006-10-11 01:20:53 -0700[diff] [blame]69 struct ext4_reserve_window_node s_rsv_window_head;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]70
71 /* Journaling */
Theodore Ts'oaf5bc922008-09-08 22:25:24 -0400[diff] [blame]72 struct inode *s_journal_inode;
73 struct journal_s *s_journal;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]74 struct list_head s_orphan;
75 unsigned long s_commit_interval;
76 struct block_device *journal_bdev;
Jose R. Santose23291b2007-07-18 08:57:06 -0400[diff] [blame]77#ifdef CONFIG_JBD2_DEBUG
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]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
Kalpak Shahef7f3832007-07-18 09:15:20 -0400[diff] [blame]85 unsigned int s_want_extra_isize; /* New inodes should reserve # bytes */
Alex Tomasa86c6182006-10-11 01:21:03 -0700[diff] [blame]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
Alex Tomasc9de5602008-01-29 00:19:52 -0500[diff] [blame]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;
Alex Tomasc9de5602008-01-29 00:19:52 -0500[diff] [blame]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;
Jose R. Santos772cb7c2008-07-11 19:27:31 -0400[diff] [blame]147
148 unsigned int s_log_groups_per_flex;
149 struct flex_groups *s_flex_groups;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]150};
151
Christoph Hellwig3dcf5452008-04-29 18:13:32 -0400[diff] [blame]152#endif /* _EXT4_SB */