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-rw-r--r--fs/ext2/ext2.h631
-rw-r--r--fs/ext2/xattr_security.c5
-rw-r--r--fs/ext2/xattr_trusted.c5
-rw-r--r--fs/ext2/xip.c2
-rw-r--r--include/linux/ext2_fs.h521
-rw-r--r--include/linux/ext2_fs_sb.h126
6 files changed, 634 insertions, 656 deletions
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index 75ad433c6691..0b2b4db5bdcd 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -1,5 +1,636 @@
1/*
2 * Copyright (C) 1992, 1993, 1994, 1995
3 * Remy Card (card@masi.ibp.fr)
4 * Laboratoire MASI - Institut Blaise Pascal
5 * Universite Pierre et Marie Curie (Paris VI)
6 *
7 * from
8 *
9 * linux/include/linux/minix_fs.h
10 *
11 * Copyright (C) 1991, 1992 Linus Torvalds
12 */
1#include <linux/fs.h> 13#include <linux/fs.h>
2#include <linux/ext2_fs.h> 14#include <linux/ext2_fs.h>
15#include <linux/blockgroup_lock.h>
16#include <linux/percpu_counter.h>
17#include <linux/rbtree.h>
18
19/* XXX Here for now... not interested in restructing headers JUST now */
20
21/* data type for block offset of block group */
22typedef int ext2_grpblk_t;
23
24/* data type for filesystem-wide blocks number */
25typedef unsigned long ext2_fsblk_t;
26
27#define E2FSBLK "%lu"
28
29struct ext2_reserve_window {
30 ext2_fsblk_t _rsv_start; /* First byte reserved */
31 ext2_fsblk_t _rsv_end; /* Last byte reserved or 0 */
32};
33
34struct ext2_reserve_window_node {
35 struct rb_node rsv_node;
36 __u32 rsv_goal_size;
37 __u32 rsv_alloc_hit;
38 struct ext2_reserve_window rsv_window;
39};
40
41struct ext2_block_alloc_info {
42 /* information about reservation window */
43 struct ext2_reserve_window_node rsv_window_node;
44 /*
45 * was i_next_alloc_block in ext2_inode_info
46 * is the logical (file-relative) number of the
47 * most-recently-allocated block in this file.
48 * We use this for detecting linearly ascending allocation requests.
49 */
50 __u32 last_alloc_logical_block;
51 /*
52 * Was i_next_alloc_goal in ext2_inode_info
53 * is the *physical* companion to i_next_alloc_block.
54 * it the the physical block number of the block which was most-recentl
55 * allocated to this file. This give us the goal (target) for the next
56 * allocation when we detect linearly ascending requests.
57 */
58 ext2_fsblk_t last_alloc_physical_block;
59};
60
61#define rsv_start rsv_window._rsv_start
62#define rsv_end rsv_window._rsv_end
63
64/*
65 * second extended-fs super-block data in memory
66 */
67struct ext2_sb_info {
68 unsigned long s_frag_size; /* Size of a fragment in bytes */
69 unsigned long s_frags_per_block;/* Number of fragments per block */
70 unsigned long s_inodes_per_block;/* Number of inodes per block */
71 unsigned long s_frags_per_group;/* Number of fragments in a group */
72 unsigned long s_blocks_per_group;/* Number of blocks in a group */
73 unsigned long s_inodes_per_group;/* Number of inodes in a group */
74 unsigned long s_itb_per_group; /* Number of inode table blocks per group */
75 unsigned long s_gdb_count; /* Number of group descriptor blocks */
76 unsigned long s_desc_per_block; /* Number of group descriptors per block */
77 unsigned long s_groups_count; /* Number of groups in the fs */
78 unsigned long s_overhead_last; /* Last calculated overhead */
79 unsigned long s_blocks_last; /* Last seen block count */
80 struct buffer_head * s_sbh; /* Buffer containing the super block */
81 struct ext2_super_block * s_es; /* Pointer to the super block in the buffer */
82 struct buffer_head ** s_group_desc;
83 unsigned long s_mount_opt;
84 unsigned long s_sb_block;
85 uid_t s_resuid;
86 gid_t s_resgid;
87 unsigned short s_mount_state;
88 unsigned short s_pad;
89 int s_addr_per_block_bits;
90 int s_desc_per_block_bits;
91 int s_inode_size;
92 int s_first_ino;
93 spinlock_t s_next_gen_lock;
94 u32 s_next_generation;
95 unsigned long s_dir_count;
96 u8 *s_debts;
97 struct percpu_counter s_freeblocks_counter;
98 struct percpu_counter s_freeinodes_counter;
99 struct percpu_counter s_dirs_counter;
100 struct blockgroup_lock *s_blockgroup_lock;
101 /* root of the per fs reservation window tree */
102 spinlock_t s_rsv_window_lock;
103 struct rb_root s_rsv_window_root;
104 struct ext2_reserve_window_node s_rsv_window_head;
105 /*
106 * s_lock protects against concurrent modifications of s_mount_state,
107 * s_blocks_last, s_overhead_last and the content of superblock's
108 * buffer pointed to by sbi->s_es.
109 *
110 * Note: It is used in ext2_show_options() to provide a consistent view
111 * of the mount options.
112 */
113 spinlock_t s_lock;
114};
115
116static inline spinlock_t *
117sb_bgl_lock(struct ext2_sb_info *sbi, unsigned int block_group)
118{
119 return bgl_lock_ptr(sbi->s_blockgroup_lock, block_group);
120}
121
122/*
123 * Define EXT2FS_DEBUG to produce debug messages
124 */
125#undef EXT2FS_DEBUG
126
127/*
128 * Define EXT2_RESERVATION to reserve data blocks for expanding files
129 */
130#define EXT2_DEFAULT_RESERVE_BLOCKS 8
131/*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
132#define EXT2_MAX_RESERVE_BLOCKS 1027
133#define EXT2_RESERVE_WINDOW_NOT_ALLOCATED 0
134/*
135 * The second extended file system version
136 */
137#define EXT2FS_DATE "95/08/09"
138#define EXT2FS_VERSION "0.5b"
139
140/*
141 * Debug code
142 */
143#ifdef EXT2FS_DEBUG
144# define ext2_debug(f, a...) { \
145 printk ("EXT2-fs DEBUG (%s, %d): %s:", \
146 __FILE__, __LINE__, __func__); \
147 printk (f, ## a); \
148 }
149#else
150# define ext2_debug(f, a...) /**/
151#endif
152
153/*
154 * Special inode numbers
155 */
156#define EXT2_BAD_INO 1 /* Bad blocks inode */
157#define EXT2_ROOT_INO 2 /* Root inode */
158#define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */
159#define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */
160
161/* First non-reserved inode for old ext2 filesystems */
162#define EXT2_GOOD_OLD_FIRST_INO 11
163
164static inline struct ext2_sb_info *EXT2_SB(struct super_block *sb)
165{
166 return sb->s_fs_info;
167}
168
169/*
170 * Macro-instructions used to manage several block sizes
171 */
172#define EXT2_MIN_BLOCK_SIZE 1024
173#define EXT2_MAX_BLOCK_SIZE 4096
174#define EXT2_MIN_BLOCK_LOG_SIZE 10
175#define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize)
176#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
177#define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
178#define EXT2_ADDR_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_addr_per_block_bits)
179#define EXT2_INODE_SIZE(s) (EXT2_SB(s)->s_inode_size)
180#define EXT2_FIRST_INO(s) (EXT2_SB(s)->s_first_ino)
181
182/*
183 * Macro-instructions used to manage fragments
184 */
185#define EXT2_MIN_FRAG_SIZE 1024
186#define EXT2_MAX_FRAG_SIZE 4096
187#define EXT2_MIN_FRAG_LOG_SIZE 10
188#define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->s_frag_size)
189#define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->s_frags_per_block)
190
191/*
192 * Structure of a blocks group descriptor
193 */
194struct ext2_group_desc
195{
196 __le32 bg_block_bitmap; /* Blocks bitmap block */
197 __le32 bg_inode_bitmap; /* Inodes bitmap block */
198 __le32 bg_inode_table; /* Inodes table block */
199 __le16 bg_free_blocks_count; /* Free blocks count */
200 __le16 bg_free_inodes_count; /* Free inodes count */
201 __le16 bg_used_dirs_count; /* Directories count */
202 __le16 b