ext4: fix data corruption in inodes with journalled data

[linux-2.6-block.git] / fs / ext4 / ext4.h

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 1921392cd7085d4b2679ea398979ec78d17d2099..62cee2b6fe799a42bb7ca16dc1aeb73dc0e02e70 100644 (file)
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -526,6 +526,7 @@ struct ext4_new_group_data {
 #define EXT4_FREE_BLOCKS_METADATA      0x0001
 #define EXT4_FREE_BLOCKS_FORGET                0x0002
 #define EXT4_FREE_BLOCKS_VALIDATED     0x0004
+#define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE        0x0008
 
 /*
  * ioctl commands
@@ -1214,6 +1215,9 @@ struct ext4_sb_info {
 
        /* Kernel thread for multiple mount protection */
        struct task_struct *s_mmp_tsk;
+
+       /* record the last minlen when FITRIM is called. */
+       atomic_t s_last_trim_minblks;
 };
 
 static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb)
@@ -1743,6 +1747,7 @@ extern unsigned ext4_init_block_bitmap(struct super_block *sb,
                                       struct ext4_group_desc *desc);
 #define ext4_free_blocks_after_init(sb, group, desc)                   \
                ext4_init_block_bitmap(sb, NULL, group, desc)
+ext4_fsblk_t ext4_inode_to_goal_block(struct inode *);
 
 /* dir.c */
 extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *,
@@ -1834,6 +1839,17 @@ extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
 extern qsize_t *ext4_get_reserved_space(struct inode *inode);
 extern void ext4_da_update_reserve_space(struct inode *inode,
                                        int used, int quota_claim);
+
+/* indirect.c */
+extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode,
+                               struct ext4_map_blocks *map, int flags);
+extern ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
+                               const struct iovec *iov, loff_t offset,
+                               unsigned long nr_segs);
+extern int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock);
+extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks, int chunk);
+extern void ext4_ind_truncate(struct inode *inode);
+
 /* ioctl.c */
 extern long ext4_ioctl(struct file *, unsigned int, unsigned long);
 extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long);
@@ -2067,11 +2083,19 @@ struct ext4_group_info {
                                         * 5 free 8-block regions. */
 };
 
-#define EXT4_GROUP_INFO_NEED_INIT_BIT  0
+#define EXT4_GROUP_INFO_NEED_INIT_BIT          0
+#define EXT4_GROUP_INFO_WAS_TRIMMED_BIT                1
 
 #define EXT4_MB_GRP_NEED_INIT(grp)     \
        (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state)))
 
+#define EXT4_MB_GRP_WAS_TRIMMED(grp)   \
+       (test_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
+#define EXT4_MB_GRP_SET_TRIMMED(grp)   \
+       (set_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
+#define EXT4_MB_GRP_CLEAR_TRIMMED(grp) \
+       (clear_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
+
 #define EXT4_MAX_CONTENTION            8
 #define EXT4_CONTENTION_THRESHOLD      2
 
@@ -2122,6 +2146,19 @@ static inline void ext4_mark_super_dirty(struct super_block *sb)
                sb->s_dirt =1;
 }
 
+/*
+ * Block validity checking
+ */
+#define ext4_check_indirect_blockref(inode, bh)                                \
+       ext4_check_blockref(__func__, __LINE__, inode,                  \
+                           (__le32 *)(bh)->b_data,                     \
+                           EXT4_ADDR_PER_BLOCK((inode)->i_sb))
+
+#define ext4_ind_check_inode(inode)                                    \
+       ext4_check_blockref(__func__, __LINE__, inode,                  \
+                           EXT4_I(inode)->i_data,                      \
+                           EXT4_NDIR_BLOCKS)
+
 /*
  * Inodes and files operations
  */
@@ -2151,6 +2188,8 @@ extern void ext4_exit_system_zone(void);
 extern int ext4_data_block_valid(struct ext4_sb_info *sbi,
                                 ext4_fsblk_t start_blk,
                                 unsigned int count);
+extern int ext4_check_blockref(const char *, unsigned int,
+                              struct inode *, __le32 *, unsigned int);
 
 /* extents.c */
 extern int ext4_ext_tree_init(handle_t *handle, struct inode *);