1 files changed, 100 insertions, 4 deletions

diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index de1f9f78625a..cdee7aaa57aa 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -71,7 +71,7 @@
 /*
  * Maximal count of links to a file
  */
-#define EXT4_LINK_MAX           32000
+#define EXT4_LINK_MAX           65000
 
 /*
  * Macro-instructions used to manage several block sizes
@@ -102,6 +102,7 @@
                                  EXT4_GOOD_OLD_FIRST_INO : \
                                  (s)->s_first_ino)
 #endif
+#define EXT4_BLOCK_ALIGN(size, blkbits)         ALIGN((size), (1 << (blkbits)))
 
 /*
  * Macro-instructions used to manage fragments
@@ -201,6 +202,7 @@ struct ext4_group_desc
 #define EXT4_STATE_JDATA                0x00000001 /* journaled data exists */
 #define EXT4_STATE_NEW                  0x00000002 /* inode is newly created */
 #define EXT4_STATE_XATTR                0x00000004 /* has in-inode xattrs */
+#define EXT4_STATE_NO_EXPAND            0x00000008 /* No space for expansion */
 
 /* Used to pass group descriptor data when online resize is done */
 struct ext4_new_group_input {
@@ -225,6 +227,11 @@ struct ext4_new_group_data {
         __u32 free_blocks_count;
 };
 
+/*
+ * Following is used by preallocation code to tell get_blocks() that we
+ * want uninitialzed extents.
+ */
+#define EXT4_CREATE_UNINITIALIZED_EXT           2
 
 /*
  * ioctl commands
@@ -237,7 +244,7 @@ struct ext4_new_group_data {
 #define EXT4_IOC_GROUP_ADD              _IOW('f', 8,struct ext4_new_group_input)
 #define EXT4_IOC_GETVERSION_OLD         FS_IOC_GETVERSION
 #define EXT4_IOC_SETVERSION_OLD         FS_IOC_SETVERSION
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
 #define EXT4_IOC_WAIT_FOR_READONLY      _IOR('f', 99, long)
 #endif
 #define EXT4_IOC_GETRSVSZ               _IOR('f', 5, long)
@@ -253,7 +260,7 @@ 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)
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
 #define EXT4_IOC32_WAIT_FOR_READONLY    _IOR('f', 99, int)
 #endif
 #define EXT4_IOC32_GETVERSION_OLD       FS_IOC32_GETVERSION
@@ -282,7 +289,7 @@ struct ext4_inode {
         __le16  i_uid;          /* Low 16 bits of Owner Uid */
         __le32  i_size;         /* Size in bytes */
         __le32  i_atime;        /* Access time */
-        __le32  i_ctime;        /* Creation time */
+        __le32  i_ctime;        /* Inode Change time */
         __le32  i_mtime;        /* Modification time */
         __le32  i_dtime;        /* Deletion Time */
         __le16  i_gid;          /* Low 16 bits of Group Id */
@@ -331,10 +338,85 @@ struct ext4_inode {
         } osd2;                         /* OS dependent 2 */
         __le16  i_extra_isize;
         __le16  i_pad1;
+        __le32  i_ctime_extra;  /* extra Change time      (nsec << 2 | epoch) */
+        __le32  i_mtime_extra;  /* extra Modification time(nsec << 2 | epoch) */
+        __le32  i_atime_extra;  /* extra Access time      (nsec << 2 | epoch) */
+        __le32  i_crtime;       /* File Creation time */
+        __le32  i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */
 };
 
 #define i_size_high     i_dir_acl
 
+#define EXT4_EPOCH_BITS 2
+#define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1)
+#define EXT4_NSEC_MASK  (~0UL << EXT4_EPOCH_BITS)
+
+/*
+ * Extended fields will fit into an inode if the filesystem was formatted
+ * with large inodes (-I 256 or larger) and there are not currently any EAs
+ * consuming all of the available space. For new inodes we always reserve
+ * enough space for the kernel's known extended fields, but for inodes
+ * created with an old kernel this might not have been the case. None of
+ * the extended inode fields is critical for correct filesystem operation.
+ * This macro checks if a certain field fits in the inode. Note that
+ * inode-size = GOOD_OLD_INODE_SIZE + i_extra_isize
+ */
+#define EXT4_FITS_IN_INODE(ext4_inode, einode, field)   \
+        ((offsetof(typeof(*ext4_inode), field) +        \
+          sizeof((ext4_inode)->field))                  \
+        <= (EXT4_GOOD_OLD_INODE_SIZE +                  \
+            (einode)->i_extra_isize))                   \
+
+static inline __le32 ext4_encode_extra_time(struct timespec *time)
+{
+       return cpu_to_le32((sizeof(time->tv_sec) > 4 ?
+                           time->tv_sec >> 32 : 0) |
+                           ((time->tv_nsec << 2) & EXT4_NSEC_MASK));
+}
+
+static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra)
+{
+       if (sizeof(time->tv_sec) > 4)
+               time->tv_sec |= (__u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK)
+                               << 32;
+       time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> 2;
+}
+
+#define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode)                          \
+do {                                                                           \
+        (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec);               \
+        if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra))     \
+                (raw_inode)->xtime ## _extra =                                 \
+                                ext4_encode_extra_time(&(inode)->xtime);       \
+} while (0)
+
+#define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode)                        \
+do {                                                                           \
+        if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime))                      \
+                (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec);      \
+        if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra))            \
+                (raw_inode)->xtime ## _extra =                                 \
+                                ext4_encode_extra_time(&(einode)->xtime);      \
+} while (0)
+
+#define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode)                          \
+do {                                                                           \
+        (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime);       \
+        if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra))     \
+                ext4_decode_extra_time(&(inode)->xtime,                        \
+                                       raw_inode->xtime ## _extra);            \
+} while (0)
+
+#define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode)                        \
+do {                                                                           \
+        if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime))                      \
+                (einode)->xtime.tv_sec =                                       \
+                        (signed)le32_to_cpu((raw_inode)->xtime);               \
+        if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra))            \
+                ext4_decode_extra_time(&(einode)->xtime,                       \
+                                       raw_inode->xtime ## _extra);            \
+} while (0)
+
 #if defined(__KERNEL__) || defined(__linux__)
 #define i_reserved1     osd1.linux1.l_i_reserved1
 #define i_frag          osd2.linux2.l_i_frag
@@ -533,6 +615,13 @@ static inline struct ext4_inode_info *EXT4_I(struct inode *inode)
         return container_of(inode, struct ext4_inode_info, vfs_inode);
 }
 
+static inline struct timespec ext4_current_time(struct inode *inode)
+{
+        return (inode->i_sb->s_time_gran < NSEC_PER_SEC) ?
+                current_fs_time(inode->i_sb) : CURRENT_TIME_SEC;
+}
+
+
 static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
 {
         return ino == EXT4_ROOT_INO ||
@@ -603,6 +692,8 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
 #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER     0x0001
 #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE       0x0002
 #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR        0x0004
+#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK        0x0020
+#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE      0x0040
 
 #define EXT4_FEATURE_INCOMPAT_COMPRESSION       0x0001
 #define EXT4_FEATURE_INCOMPAT_FILETYPE          0x0002
@@ -620,6 +711,8 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
                                          EXT4_FEATURE_INCOMPAT_64BIT)
 #define EXT4_FEATURE_RO_COMPAT_SUPP     (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
                                          EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
+                                         EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
+                                         EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
                                          EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
 
 /*
@@ -862,6 +955,7 @@ extern int ext4_change_inode_journal_flag(struct inode *, int);
 extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *);
 extern void ext4_truncate (struct inode *);
 extern void ext4_set_inode_flags(struct inode *);
+extern void ext4_get_inode_flags(struct ext4_inode_info *);
 extern void ext4_set_aops(struct inode *inode);
 extern int ext4_writepage_trans_blocks(struct inode *);
 extern int ext4_block_truncate_page(handle_t *handle, struct page *page,
@@ -983,6 +1077,8 @@ extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
 extern void ext4_ext_truncate(struct inode *, struct page *);
 extern void ext4_ext_init(struct super_block *);
 extern void ext4_ext_release(struct super_block *);
+extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset,
+                          loff_t len);
 static inline int
 ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block,
                         unsigned long max_blocks, struct buffer_head *bh,