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review.evervolv.com / android_kernel_htc_msm8960 / 9b823b43ff308c914530ec7fde5e2d79cb37b51a / . / include / linux / ext4_fs_sb.h
blob: 691a713139ceea2b9457d16ab86286f2d1a972fe [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 */
42 struct buffer_head * s_sbh; /* Buffer containing the super block */
Mingming Cao617ba132006-10-11 01:20:53 -0700[diff] [blame]43 struct ext4_super_block * s_es; /* Pointer to the super block in the buffer */
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]44 struct buffer_head ** s_group_desc;
45 unsigned long s_mount_opt;
46 uid_t s_resuid;
47 gid_t s_resgid;
48 unsigned short s_mount_state;
49 unsigned short s_pad;
50 int s_addr_per_block_bits;
51 int s_desc_per_block_bits;
52 int s_inode_size;
53 int s_first_ino;
54 spinlock_t s_next_gen_lock;
55 u32 s_next_generation;
56 u32 s_hash_seed[4];
57 int s_def_hash_version;
58 struct percpu_counter s_freeblocks_counter;
59 struct percpu_counter s_freeinodes_counter;
60 struct percpu_counter s_dirs_counter;
61 struct blockgroup_lock s_blockgroup_lock;
62
63 /* root of the per fs reservation window tree */
64 spinlock_t s_rsv_window_lock;
65 struct rb_root s_rsv_window_root;
Mingming Cao617ba132006-10-11 01:20:53 -0700[diff] [blame]66 struct ext4_reserve_window_node s_rsv_window_head;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]67
68 /* Journaling */
69 struct inode * s_journal_inode;
70 struct journal_s * s_journal;
71 struct list_head s_orphan;
72 unsigned long s_commit_interval;
73 struct block_device *journal_bdev;
74#ifdef CONFIG_JBD_DEBUG
75 struct timer_list turn_ro_timer; /* For turning read-only (crash simulation) */
76 wait_queue_head_t ro_wait_queue; /* For people waiting for the fs to go read-only */
77#endif
78#ifdef CONFIG_QUOTA
79 char *s_qf_names[MAXQUOTAS]; /* Names of quota files with journalled quota */
80 int s_jquota_fmt; /* Format of quota to use */
81#endif
Alex Tomasa86c6182006-10-11 01:21:03 -0700[diff] [blame]82
83#ifdef EXTENTS_STATS
84 /* ext4 extents stats */
85 unsigned long s_ext_min;
86 unsigned long s_ext_max;
87 unsigned long s_depth_max;
88 spinlock_t s_ext_stats_lock;
89 unsigned long s_ext_blocks;
90 unsigned long s_ext_extents;
91#endif
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700[diff] [blame]92};
93
Mingming Cao617ba132006-10-11 01:20:53 -0700[diff] [blame]94#endif /* _LINUX_EXT4_FS_SB */