1 files changed, 145 insertions, 22 deletions

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index bf938cf7c5f0..60bd31026e7c 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -29,6 +29,9 @@
 #include <linux/wait.h>
 #include <linux/blockgroup_lock.h>
 #include <linux/percpu_counter.h>
+#ifdef __KERNEL__
+#include <linux/compat.h>
+#endif
 
 /*
  * The fourth extended filesystem constants/structures
@@ -54,10 +57,10 @@
 #endif
 
 #define EXT4_ERROR_INODE(inode, fmt, a...) \
-        ext4_error_inode(__func__, (inode), (fmt), ## a);
+        ext4_error_inode(__func__, (inode), (fmt), ## a)
 
 #define EXT4_ERROR_FILE(file, fmt, a...)        \
-        ext4_error_file(__func__, (file), (fmt), ## a);
+        ext4_error_file(__func__, (file), (fmt), ## a)
 
 /* data type for block offset of block group */
 typedef int ext4_grpblk_t;
@@ -72,7 +75,7 @@ typedef __u32 ext4_lblk_t;
 typedef unsigned int ext4_group_t;
 
 /*
- * Flags used in mballoc's allocation_context flags field.  
+ * Flags used in mballoc's allocation_context flags field.
  *
  * Also used to show what's going on for debugging purposes when the
  * flag field is exported via the traceport interface
@@ -126,6 +129,29 @@ struct ext4_allocation_request {
 };
 
 /*
+ * Logical to physical block mapping, used by ext4_map_blocks()
+ *
+ * This structure is used to pass requests into ext4_map_blocks() as
+ * well as to store the information returned by ext4_map_blocks().  It
+ * takes less room on the stack than a struct buffer_head.
+ */
+#define EXT4_MAP_NEW            (1 << BH_New)
+#define EXT4_MAP_MAPPED         (1 << BH_Mapped)
+#define EXT4_MAP_UNWRITTEN      (1 << BH_Unwritten)
+#define EXT4_MAP_BOUNDARY       (1 << BH_Boundary)
+#define EXT4_MAP_UNINIT         (1 << BH_Uninit)
+#define EXT4_MAP_FLAGS          (EXT4_MAP_NEW | EXT4_MAP_MAPPED |\
+                                 EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY |\
+                                 EXT4_MAP_UNINIT)
+
+struct ext4_map_blocks {
+        ext4_fsblk_t m_pblk;
+        ext4_lblk_t m_lblk;
+        unsigned int m_len;
+        unsigned int m_flags;
+};
+
+/*
  * For delayed allocation tracking
  */
 struct mpage_da_data {
@@ -321,6 +347,83 @@ static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags)
                 return flags & EXT4_OTHER_FLMASK;
 }
 
+/*
+ * Inode flags used for atomic set/get
+ */
+enum {
+        EXT4_INODE_SECRM        = 0,    /* Secure deletion */
+        EXT4_INODE_UNRM         = 1,    /* Undelete */
+        EXT4_INODE_COMPR        = 2,    /* Compress file */
+        EXT4_INODE_SYNC         = 3,    /* Synchronous updates */
+        EXT4_INODE_IMMUTABLE    = 4,    /* Immutable file */
+        EXT4_INODE_APPEND       = 5,    /* writes to file may only append */
+        EXT4_INODE_NODUMP       = 6,    /* do not dump file */
+        EXT4_INODE_NOATIME      = 7,    /* do not update atime */
+/* Reserved for compression usage... */
+        EXT4_INODE_DIRTY        = 8,
+        EXT4_INODE_COMPRBLK     = 9,    /* One or more compressed clusters */
+        EXT4_INODE_NOCOMPR      = 10,   /* Don't compress */
+        EXT4_INODE_ECOMPR       = 11,   /* Compression error */
+/* End compression flags --- maybe not all used */
+        EXT4_INODE_INDEX        = 12,   /* hash-indexed directory */
+        EXT4_INODE_IMAGIC       = 13,   /* AFS directory */
+        EXT4_INODE_JOURNAL_DATA = 14,   /* file data should be journaled */
+        EXT4_INODE_NOTAIL       = 15,   /* file tail should not be merged */
+        EXT4_INODE_DIRSYNC      = 16,   /* dirsync behaviour (directories only) */
+        EXT4_INODE_TOPDIR       = 17,   /* Top of directory hierarchies*/
+        EXT4_INODE_HUGE_FILE    = 18,   /* Set to each huge file */
+        EXT4_INODE_EXTENTS      = 19,   /* Inode uses extents */
+        EXT4_INODE_EA_INODE     = 21,   /* Inode used for large EA */
+        EXT4_INODE_EOFBLOCKS    = 22,   /* Blocks allocated beyond EOF */
+        EXT4_INODE_RESERVED     = 31,   /* reserved for ext4 lib */
+};
+
+#define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG))
+#define CHECK_FLAG_VALUE(FLAG) if (!TEST_FLAG_VALUE(FLAG)) { \
+        printk(KERN_EMERG "EXT4 flag fail: " #FLAG ": %d %d\n", \
+                EXT4_##FLAG##_FL, EXT4_INODE_##FLAG); BUG_ON(1); }
+
+/*
+ * Since it's pretty easy to mix up bit numbers and hex values, and we
+ * can't do a compile-time test for ENUM values, we use a run-time
+ * test to make sure that EXT4_XXX_FL is consistent with respect to
+ * EXT4_INODE_XXX.  If all is well the printk and BUG_ON will all drop
+ * out so it won't cost any extra space in the compiled kernel image.
+ * But it's important that these values are the same, since we are
+ * using EXT4_INODE_XXX to test for the flag values, but EXT4_XX_FL
+ * must be consistent with the values of FS_XXX_FL defined in
+ * include/linux/fs.h and the on-disk values found in ext2, ext3, and
+ * ext4 filesystems, and of course the values defined in e2fsprogs.
+ *
+ * It's not paranoia if the Murphy's Law really *is* out to get you.  :-)
+ */
+static inline void ext4_check_flag_values(void)
+{
+        CHECK_FLAG_VALUE(SECRM);
+        CHECK_FLAG_VALUE(UNRM);
+        CHECK_FLAG_VALUE(COMPR);
+        CHECK_FLAG_VALUE(SYNC);
+        CHECK_FLAG_VALUE(IMMUTABLE);
+        CHECK_FLAG_VALUE(APPEND);
+        CHECK_FLAG_VALUE(NODUMP);
+        CHECK_FLAG_VALUE(NOATIME);
+        CHECK_FLAG_VALUE(DIRTY);
+        CHECK_FLAG_VALUE(COMPRBLK);
+        CHECK_FLAG_VALUE(NOCOMPR);
+        CHECK_FLAG_VALUE(ECOMPR);
+        CHECK_FLAG_VALUE(INDEX);
+        CHECK_FLAG_VALUE(IMAGIC);
+        CHECK_FLAG_VALUE(JOURNAL_DATA);
+        CHECK_FLAG_VALUE(NOTAIL);
+        CHECK_FLAG_VALUE(DIRSYNC);
+        CHECK_FLAG_VALUE(TOPDIR);
+        CHECK_FLAG_VALUE(HUGE_FILE);
+        CHECK_FLAG_VALUE(EXTENTS);
+        CHECK_FLAG_VALUE(EA_INODE);
+        CHECK_FLAG_VALUE(EOFBLOCKS);
+        CHECK_FLAG_VALUE(RESERVED);
+}
+
 /* Used to pass group descriptor data when online resize is done */
 struct ext4_new_group_input {
         __u32 group;            /* Group number for this data */
@@ -332,6 +435,18 @@ struct ext4_new_group_input {
         __u16 unused;
 };
 
+#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
+struct compat_ext4_new_group_input {
+        u32 group;
+        compat_u64 block_bitmap;
+        compat_u64 inode_bitmap;
+        compat_u64 inode_table;
+        u32 blocks_count;
+        u16 reserved_blocks;
+        u16 unused;
+};
+#endif
+
 /* The struct ext4_new_group_input in kernel space, with free_blocks_count */
 struct ext4_new_group_data {
         __u32 group;
@@ -355,7 +470,7 @@ struct ext4_new_group_data {
 #define EXT4_GET_BLOCKS_CREATE_UNINIT_EXT       (EXT4_GET_BLOCKS_UNINIT_EXT|\
                                                  EXT4_GET_BLOCKS_CREATE)
         /* Caller is from the delayed allocation writeout path,
-           so set the magic i_delalloc_reserve_flag after taking the 
+           so set the magic i_delalloc_reserve_flag after taking the
            inode allocation semaphore for */
 #define EXT4_GET_BLOCKS_DELALLOC_RESERVE        0x0004
         /* caller is from the direct IO path, request to creation of an
@@ -398,6 +513,7 @@ struct ext4_new_group_data {
 #define EXT4_IOC_ALLOC_DA_BLKS          _IO('f', 12)
 #define EXT4_IOC_MOVE_EXT               _IOWR('f', 15, struct move_extent)
 
+#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
 /*
  * ioctl commands in 32 bit emulation
  */
@@ -408,11 +524,13 @@ struct ext4_new_group_data {
 #define EXT4_IOC32_GETRSVSZ             _IOR('f', 5, int)
 #define EXT4_IOC32_SETRSVSZ             _IOW('f', 6, int)
 #define EXT4_IOC32_GROUP_EXTEND         _IOW('f', 7, unsigned int)
+#define EXT4_IOC32_GROUP_ADD            _IOW('f', 8, struct compat_ext4_new_group_input)
 #ifdef CONFIG_JBD2_DEBUG
 #define EXT4_IOC32_WAIT_FOR_READONLY    _IOR('f', 99, int)
 #endif
 #define EXT4_IOC32_GETVERSION_OLD       FS_IOC32_GETVERSION
 #define EXT4_IOC32_SETVERSION_OLD       FS_IOC32_SETVERSION
+#endif
 
 
 /*
@@ -616,9 +734,8 @@ struct ext4_ext_cache {
  */
 struct ext4_inode_info {
         __le32  i_data[15];     /* unconverted */
-        __u32   i_flags;
-        ext4_fsblk_t    i_file_acl;
         __u32   i_dtime;
+        ext4_fsblk_t    i_file_acl;
 
         /*
          * i_block_group is the number of the block group which contains
@@ -629,6 +746,7 @@ struct ext4_inode_info {
          */
         ext4_group_t    i_block_group;
         unsigned long   i_state_flags;          /* Dynamic state flags */
+        unsigned long   i_flags;
 
         ext4_lblk_t             i_dir_start_lookup;
 #ifdef CONFIG_EXT4_FS_XATTR
@@ -1062,22 +1180,25 @@ enum {
         EXT4_STATE_DA_ALLOC_CLOSE,      /* Alloc DA blks on close */
         EXT4_STATE_EXT_MIGRATE,         /* Inode is migrating */
         EXT4_STATE_DIO_UNWRITTEN,       /* need convert on dio done*/
+        EXT4_STATE_NEWENTRY,            /* File just added to dir */
 };
 
-static inline int ext4_test_inode_state(struct inode *inode, int bit)
-{
-        return test_bit(bit, &EXT4_I(inode)->i_state_flags);
-}
-
-static inline void ext4_set_inode_state(struct inode *inode, int bit)
-{
-        set_bit(bit, &EXT4_I(inode)->i_state_flags);
+#define EXT4_INODE_BIT_FNS(name, field)                                 \
+static inline int ext4_test_inode_##name(struct inode *inode, int bit)  \
+{                                                                       \
+        return test_bit(bit, &EXT4_I(inode)->i_##field);                \
+}                                                                       \
+static inline void ext4_set_inode_##name(struct inode *inode, int bit)  \
+{                                                                       \
+        set_bit(bit, &EXT4_I(inode)->i_##field);                        \
+}                                                                       \
+static inline void ext4_clear_inode_##name(struct inode *inode, int bit) \
+{                                                                       \
+        clear_bit(bit, &EXT4_I(inode)->i_##field);                      \
 }
 
-static inline void ext4_clear_inode_state(struct inode *inode, int bit)
-{
-        clear_bit(bit, &EXT4_I(inode)->i_state_flags);
-}
+EXT4_INODE_BIT_FNS(flag, flags)
+EXT4_INODE_BIT_FNS(state, state_flags)
 #else
 /* Assume that user mode programs are passing in an ext4fs superblock, not
  * a kernel struct super_block.  This will allow us to call the feature-test
@@ -1264,7 +1385,7 @@ struct ext4_dir_entry_2 {
 
 #define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \
                                       EXT4_FEATURE_COMPAT_DIR_INDEX) && \
-                      (EXT4_I(dir)->i_flags & EXT4_INDEX_FL))
+                    ext4_test_inode_flag((dir), EXT4_INODE_INDEX))
 #define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX)
 #define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
 
@@ -1678,6 +1799,7 @@ struct ext4_group_info {
         ext4_grpblk_t   bb_first_free;  /* first free block */
         ext4_grpblk_t   bb_free;        /* total free blocks */
         ext4_grpblk_t   bb_fragments;   /* nr of freespace fragments */
+        ext4_grpblk_t   bb_largest_free_order;/* order of largest frag in BG */
         struct          list_head bb_prealloc_list;
 #ifdef DOUBLE_CHECK
         void            *bb_bitmap;
@@ -1772,9 +1894,8 @@ extern int ext4_ext_tree_init(handle_t *handle, struct inode *);
 extern int ext4_ext_writepage_trans_blocks(struct inode *, int);
 extern int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks,
                                        int chunk);
-extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
-                               ext4_lblk_t iblock, unsigned int max_blocks,
-                               struct buffer_head *bh_result, int flags);
+extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
+                               struct ext4_map_blocks *map, int flags);
 extern void ext4_ext_truncate(struct inode *);
 extern void ext4_ext_init(struct super_block *);
 extern void ext4_ext_release(struct super_block *);
@@ -1782,6 +1903,8 @@ extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset,
                           loff_t len);
 extern int ext4_convert_unwritten_extents(struct inode *inode, loff_t offset,
                           ssize_t len);
+extern int ext4_map_blocks(handle_t *handle, struct inode *inode,
+                           struct ext4_map_blocks *map, int flags);
 extern int ext4_get_blocks(handle_t *handle, struct inode *inode,
                            sector_t block, unsigned int max_blocks,
                            struct buffer_head *bh, int flags);