ext4: Rename i_dir_acl to i_size_high

Rename ext4_inode.i_dir_acl to i_size_high
drop ext4_inode_info.i_dir_acl as it is not used
Rename ext4_inode.i_size to ext4_inode.i_size_lo
Add helper function for accessing the ext4_inode combined i_size.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

4 files changed, 34 insertions, 38 deletions

diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 00b152b92480..17b5df14f85b 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -709,7 +709,6 @@ got:
         if (!S_ISDIR(mode))
                 ei->i_flags &= ~EXT4_DIRSYNC_FL;
         ei->i_file_acl = 0;
-        ei->i_dir_acl = 0;
         ei->i_dtime = 0;
         ei->i_block_alloc_info = NULL;
         ei->i_block_group = group;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 7bcec1860084..e6634550cfc8 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2694,7 +2694,6 @@ void ext4_read_inode(struct inode * inode)
                 inode->i_gid |= le16_to_cpu(raw_inode->i_gid_high) << 16;
         }
         inode->i_nlink = le16_to_cpu(raw_inode->i_links_count);
-        inode->i_size = le32_to_cpu(raw_inode->i_size);
 
         ei->i_state = 0;
         ei->i_dir_start_lookup = 0;
@@ -2720,15 +2719,11 @@ void ext4_read_inode(struct inode * inode)
         ei->i_flags = le32_to_cpu(raw_inode->i_flags);
         ei->i_file_acl = le32_to_cpu(raw_inode->i_file_acl_lo);
         if (EXT4_SB(inode->i_sb)->s_es->s_creator_os !=
-            cpu_to_le32(EXT4_OS_HURD))
+            cpu_to_le32(EXT4_OS_HURD)) {
                 ei->i_file_acl |=
                         ((__u64)le16_to_cpu(raw_inode->i_file_acl_high)) << 32;
-        if (!S_ISREG(inode->i_mode)) {
-                ei->i_dir_acl = le32_to_cpu(raw_inode->i_dir_acl);
-        } else {
-                inode->i_size |=
-                        ((__u64)le32_to_cpu(raw_inode->i_size_high)) << 32;
         }
+        inode->i_size = ext4_isize(raw_inode);
         ei->i_disksize = inode->i_size;
         inode->i_generation = le32_to_cpu(raw_inode->i_generation);
         ei->i_block_group = iloc.block_group;
@@ -2852,7 +2847,6 @@ static int ext4_do_update_inode(handle_t *handle,
                 raw_inode->i_gid_high = 0;
         }
         raw_inode->i_links_count = cpu_to_le16(inode->i_nlink);
-        raw_inode->i_size = cpu_to_le32(ei->i_disksize);
 
         EXT4_INODE_SET_XTIME(i_ctime, inode, raw_inode);
         EXT4_INODE_SET_XTIME(i_mtime, inode, raw_inode);
@@ -2867,32 +2861,27 @@ static int ext4_do_update_inode(handle_t *handle,
                 raw_inode->i_file_acl_high =
                         cpu_to_le16(ei->i_file_acl >> 32);
         raw_inode->i_file_acl_lo = cpu_to_le32(ei->i_file_acl);
-        if (!S_ISREG(inode->i_mode)) {
-                raw_inode->i_dir_acl = cpu_to_le32(ei->i_dir_acl);
-        } else {
-                raw_inode->i_size_high =
-                        cpu_to_le32(ei->i_disksize >> 32);
-                if (ei->i_disksize > 0x7fffffffULL) {
-                        struct super_block *sb = inode->i_sb;
-                        if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
-                                        EXT4_FEATURE_RO_COMPAT_LARGE_FILE) ||
-                            EXT4_SB(sb)->s_es->s_rev_level ==
-                                        cpu_to_le32(EXT4_GOOD_OLD_REV)) {
-                               /* If this is the first large file
-                                * created, add a flag to the superblock.
-                                */
-                                err = ext4_journal_get_write_access(handle,
-                                                EXT4_SB(sb)->s_sbh);
-                                if (err)
-                                        goto out_brelse;
-                                ext4_update_dynamic_rev(sb);
-                                EXT4_SET_RO_COMPAT_FEATURE(sb,
+        ext4_isize_set(raw_inode, ei->i_disksize);
+        if (ei->i_disksize > 0x7fffffffULL) {
+                struct super_block *sb = inode->i_sb;
+                if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
+                                EXT4_FEATURE_RO_COMPAT_LARGE_FILE) ||
+                                EXT4_SB(sb)->s_es->s_rev_level ==
+                                cpu_to_le32(EXT4_GOOD_OLD_REV)) {
+                        /* If this is the first large file
+                         * created, add a flag to the superblock.
+                         */
+                        err = ext4_journal_get_write_access(handle,
+                                        EXT4_SB(sb)->s_sbh);
+                        if (err)
+                                goto out_brelse;
+                        ext4_update_dynamic_rev(sb);
+                        EXT4_SET_RO_COMPAT_FEATURE(sb,
                                         EXT4_FEATURE_RO_COMPAT_LARGE_FILE);
-                                sb->s_dirt = 1;
-                                handle->h_sync = 1;
-                                err = ext4_journal_dirty_metadata(handle,
-                                                EXT4_SB(sb)->s_sbh);
-                        }
+                        sb->s_dirt = 1;
+                        handle->h_sync = 1;
+                        err = ext4_journal_dirty_metadata(handle,
+                                        EXT4_SB(sb)->s_sbh);
                 }
         }
         raw_inode->i_generation = cpu_to_le32(inode->i_generation);
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 6894f361d01d..a8f3faea8eff 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -275,7 +275,7 @@ struct ext4_mount_options {
 struct ext4_inode {
         __le16  i_mode;         /* File mode */
         __le16  i_uid;          /* Low 16 bits of Owner Uid */
-        __le32  i_size;         /* Size in bytes */
+        __le32  i_size_lo;      /* Size in bytes */
         __le32  i_atime;        /* Access time */
         __le32  i_ctime;        /* Inode Change time */
         __le32  i_mtime;        /* Modification time */
@@ -298,7 +298,7 @@ struct ext4_inode {
         __le32  i_block[EXT4_N_BLOCKS];/* Pointers to blocks */
         __le32  i_generation;   /* File version (for NFS) */
         __le32  i_file_acl_lo;  /* File ACL */
-        __le32  i_dir_acl;      /* Directory ACL */
+        __le32  i_size_high;
         __le32  i_obso_faddr;   /* Obsoleted fragment address */
         union {
                 struct {
@@ -330,7 +330,6 @@ struct ext4_inode {
         __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)
@@ -1049,7 +1048,17 @@ static inline void ext4_r_blocks_count_set(struct ext4_super_block *es,
         es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32);
 }
 
+static inline loff_t ext4_isize(struct ext4_inode *raw_inode)
+{
+        return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) |
+                le32_to_cpu(raw_inode->i_size_lo);
+}
 
+static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size)
+{
+        raw_inode->i_size_lo = cpu_to_le32(i_size);
+        raw_inode->i_size_high = cpu_to_le32(i_size >> 32);
+}
 
 #define ext4_std_error(sb, errno)                               \
 do {                                                            \
diff --git a/include/linux/ext4_fs_i.h b/include/linux/ext4_fs_i.h
index 2b4e3700c725..f1cd4934e46f 100644
--- a/include/linux/ext4_fs_i.h
+++ b/include/linux/ext4_fs_i.h
@@ -85,7 +85,6 @@ struct ext4_inode_info {
         __le32  i_data[15];     /* unconverted */
         __u32   i_flags;
         ext4_fsblk_t    i_file_acl;
-        __u32   i_dir_acl;
         __u32   i_dtime;
 
         /*