[PATCH] out of memory notifier

[pandora-kernel.git] / include / linux / ext3_fs.h

diff --git a/include/linux/ext3_fs.h b/include/linux/ext3_fs.h
index e7239f2..0eed918 100644 (file)
--- a/include/linux/ext3_fs.h
+++ b/include/linux/ext3_fs.h
@@ -17,11 +17,7 @@
 #define _LINUX_EXT3_FS_H
 
 #include <linux/types.h>
-#include <linux/ext3_fs_i.h>
-#include <linux/ext3_fs_sb.h>
-
-
-struct statfs;
+#include <linux/magic.h>
 
 /*
  * The second extended filesystem constants/structures
@@ -36,7 +32,8 @@ struct statfs;
  * Define EXT3_RESERVATION to reserve data blocks for expanding files
  */
 #define EXT3_DEFAULT_RESERVE_BLOCKS     8
-#define EXT3_MAX_RESERVE_BLOCKS         1024
+/*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
+#define EXT3_MAX_RESERVE_BLOCKS         1027
 #define EXT3_RESERVE_WINDOW_NOT_ALLOCATED 0
 /*
  * Always enable hashed directories
@@ -70,11 +67,6 @@ struct statfs;
 /* First non-reserved inode for old ext3 filesystems */
 #define EXT3_GOOD_OLD_FIRST_INO        11
 
-/*
- * The second extended file system magic number
- */
-#define EXT3_SUPER_MAGIC       0xEF53
-
 /*
  * Maximal count of links to a file
  */
@@ -486,6 +478,8 @@ struct ext3_super_block {
 };
 
 #ifdef __KERNEL__
+#include <linux/ext3_fs_i.h>
+#include <linux/ext3_fs_sb.h>
 static inline struct ext3_sb_info * EXT3_SB(struct super_block *sb)
 {
        return sb->s_fs_info;
@@ -494,6 +488,15 @@ static inline struct ext3_inode_info *EXT3_I(struct inode *inode)
 {
        return container_of(inode, struct ext3_inode_info, vfs_inode);
 }
+
+static inline int ext3_valid_inum(struct super_block *sb, unsigned long ino)
+{
+       return ino == EXT3_ROOT_INO ||
+               ino == EXT3_JOURNAL_INO ||
+               ino == EXT3_RESIZE_INO ||
+               (ino >= EXT3_FIRST_INO(sb) &&
+                ino <= le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count));
+}
 #else
 /* Assume that user mode programs are passing in an ext3fs superblock, not
  * a kernel struct super_block.  This will allow us to call the feature-test
@@ -663,6 +666,8 @@ struct ext3_dir_entry_2 {
 #define DX_HASH_HALF_MD4       1
 #define DX_HASH_TEA            2
 
+#ifdef __KERNEL__
+
 /* hash info structure used by the directory hash */
 struct dx_hash_info
 {
@@ -674,7 +679,6 @@ struct dx_hash_info
 
 #define EXT3_HTREE_EOF 0x7fffffff
 
-#ifdef __KERNEL__
 /*
  * Control parameters used by ext3_htree_next_block
  */
@@ -711,6 +715,14 @@ struct dir_private_info {
        __u32           next_hash;
 };
 
+/* calculate the first block number of the group */
+static inline ext3_fsblk_t
+ext3_group_first_block_no(struct super_block *sb, unsigned long group_no)
+{
+       return group_no * (ext3_fsblk_t)EXT3_BLOCKS_PER_GROUP(sb) +
+               le32_to_cpu(EXT3_SB(sb)->s_es->s_first_data_block);
+}
+
 /*
  * Special error return code only used by dx_probe() and its callers.
  */
@@ -731,12 +743,16 @@ struct dir_private_info {
 /* balloc.c */
 extern int ext3_bg_has_super(struct super_block *sb, int group);
 extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group);
-extern int ext3_new_block (handle_t *, struct inode *, unsigned long, int *);
-extern void ext3_free_blocks (handle_t *, struct inode *, unsigned long,
-                             unsigned long);
-extern void ext3_free_blocks_sb (handle_t *, struct super_block *,
-                                unsigned long, unsigned long, int *);
-extern unsigned long ext3_count_free_blocks (struct super_block *);
+extern ext3_fsblk_t ext3_new_block (handle_t *handle, struct inode *inode,
+                       ext3_fsblk_t goal, int *errp);
+extern ext3_fsblk_t ext3_new_blocks (handle_t *handle, struct inode *inode,
+                       ext3_fsblk_t goal, unsigned long *count, int *errp);
+extern void ext3_free_blocks (handle_t *handle, struct inode *inode,
+                       ext3_fsblk_t block, unsigned long count);
+extern void ext3_free_blocks_sb (handle_t *handle, struct super_block *sb,
+                                ext3_fsblk_t block, unsigned long count,
+                               unsigned long *pdquot_freed_blocks);
+extern ext3_fsblk_t ext3_count_free_blocks (struct super_block *);
 extern void ext3_check_blocks_bitmap (struct super_block *);
 extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
                                                    unsigned int block_group,
@@ -772,12 +788,13 @@ extern unsigned long ext3_count_free (struct buffer_head *, unsigned);
 
 
 /* inode.c */
-int ext3_forget(handle_t *, int, struct inode *, struct buffer_head *, int);
+int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode,
+               struct buffer_head *bh, ext3_fsblk_t blocknr);
 struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *);
 struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *);
-int ext3_get_block_handle(handle_t *handle, struct inode *inode,
-       sector_t iblock, struct buffer_head *bh_result, int create,
-       int extend_disksize);
+int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
+       sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result,
+       int create, int extend_disksize);
 
 extern void ext3_read_inode (struct inode *);
 extern int  ext3_write_inode (struct inode *, int);
@@ -807,7 +824,7 @@ extern int ext3_group_add(struct super_block *sb,
                                struct ext3_new_group_data *input);
 extern int ext3_group_extend(struct super_block *sb,
                                struct ext3_super_block *es,
-                               unsigned long n_blocks_count);
+                               ext3_fsblk_t n_blocks_count);
 
 /* super.c */
 extern void ext3_error (struct super_block *, const char *, const char *, ...)
@@ -830,11 +847,11 @@ do {                                                              \
  */
 
 /* dir.c */
-extern struct file_operations ext3_dir_operations;
+extern const struct file_operations ext3_dir_operations;
 
 /* file.c */
 extern struct inode_operations ext3_file_inode_operations;
-extern struct file_operations ext3_file_operations;
+extern const struct file_operations ext3_file_operations;
 
 /* namei.c */
 extern struct inode_operations ext3_dir_inode_operations;