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gerrit-public.fairphone.software / kernel / msm-4.19 / 9a799d71034c4e2b168740c8a8530591011313d5 / . / include / linux / ext4_fs_sb.h
blob: 1b2ffee12be910095b846d0ca18a856c5ef75e82 [file] [log] [blame]
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]1/*
Mingming Cao617ba132006-10-11 01:20:53 -0700[diff] [blame]2 * linux/include/linux/ext4_fs_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
Mingming Cao617ba132006-10-11 01:20:53 -0700[diff] [blame]16#ifndef _LINUX_EXT4_FS_SB
17#define _LINUX_EXT4_FS_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/*
28 * third extended-fs super-block data in memory
29 */
Mingming Cao617ba132006-10-11 01:20:53 -0700[diff] [blame]30struct ext4_sb_info {
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]31 unsigned long s_frag_size; /* Size of a fragment in bytes */
Alexandre Ratchov0d1ee422006-10-11 01:21:14 -0700[diff] [blame]32 unsigned long s_desc_size; /* Size of a group descriptor in bytes */
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]33 unsigned long s_frags_per_block;/* Number of fragments per block */
34 unsigned long s_inodes_per_block;/* Number of inodes per block */
35 unsigned long s_frags_per_group;/* Number of fragments in a group */
36 unsigned long s_blocks_per_group;/* Number of blocks in a group */
37 unsigned long s_inodes_per_group;/* Number of inodes in a group */
38 unsigned long s_itb_per_group; /* Number of inode table blocks per group */
39 unsigned long s_gdb_count; /* Number of group descriptor blocks */
40 unsigned long s_desc_per_block; /* Number of group descriptors per block */
41 unsigned long s_groups_count; /* Number of groups in the fs */
Badari Pulavarty5e700302007-07-15 23:42:00 -0700[diff] [blame]42 unsigned long s_overhead_last; /* Last calculated overhead */
43 unsigned long s_blocks_last; /* Last seen block count */
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]44 struct buffer_head * s_sbh; /* Buffer containing the super block */
Mingming Cao617ba132006-10-11 01:20:53 -0700[diff] [blame]45 struct ext4_super_block * s_es; /* Pointer to the super block in the buffer */
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]46 struct buffer_head ** s_group_desc;
47 unsigned long s_mount_opt;
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 struct percpu_counter s_freeblocks_counter;
61 struct percpu_counter s_freeinodes_counter;
62 struct percpu_counter s_dirs_counter;
63 struct blockgroup_lock s_blockgroup_lock;
64
65 /* root of the per fs reservation window tree */
66 spinlock_t s_rsv_window_lock;
67 struct rb_root s_rsv_window_root;
Mingming Cao617ba132006-10-11 01:20:53 -0700[diff] [blame]68 struct ext4_reserve_window_node s_rsv_window_head;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]69
70 /* Journaling */
71 struct inode * s_journal_inode;
72 struct journal_s * s_journal;
73 struct list_head s_orphan;
74 unsigned long s_commit_interval;
75 struct block_device *journal_bdev;
Jose R. Santose23291b2007-07-18 08:57:06 -0400[diff] [blame]76#ifdef CONFIG_JBD2_DEBUG
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]77 struct timer_list turn_ro_timer; /* For turning read-only (crash simulation) */
78 wait_queue_head_t ro_wait_queue; /* For people waiting for the fs to go read-only */
79#endif
80#ifdef CONFIG_QUOTA
81 char *s_qf_names[MAXQUOTAS]; /* Names of quota files with journalled quota */
82 int s_jquota_fmt; /* Format of quota to use */
83#endif
Kalpak Shahef7f3832007-07-18 09:15:20 -0400[diff] [blame]84 unsigned int s_want_extra_isize; /* New inodes should reserve # bytes */
Alex Tomasa86c6182006-10-11 01:21:03 -0700[diff] [blame]85
86#ifdef EXTENTS_STATS
87 /* ext4 extents stats */
88 unsigned long s_ext_min;
89 unsigned long s_ext_max;
90 unsigned long s_depth_max;
91 spinlock_t s_ext_stats_lock;
92 unsigned long s_ext_blocks;
93 unsigned long s_ext_extents;
94#endif
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]95};
96
Mingming Cao617ba132006-10-11 01:20:53 -0700[diff] [blame]97#endif /* _LINUX_EXT4_FS_SB */