[PATCH 1/7] ext4: Convert bg_block_bitmap to bg_block_bitmap_lo

[PATCH 1/7] ext4: Convert bg_block_bitmap to bg_block_bitmap_lo

[Aneesh Kumar K.V]

Convert bg_block_bitmap to bg_block_bitmap_lo
This helps in catching some BUGS due to direct
partial access of these split fields.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 fs/ext4/super.c         |    6 +++---
 include/linux/ext4_fs.h |    2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index d035653..fd2a6a6 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -70,9 +70,9 @@ static void ext4_write_super_lockfs(struct super_block *sb);
 ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
 			       struct ext4_group_desc *bg)
 {
-	return le32_to_cpu(bg->bg_block_bitmap) |
+	return le32_to_cpu(bg->bg_block_bitmap_lo) |
 		(EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ?
-		 (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0);
+		(ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0);
 }
 
 ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
@@ -94,7 +94,7 @@ ext4_fsblk_t ext4_inode_table(struct super_block *sb,
 void ext4_block_bitmap_set(struct super_block *sb,
 			   struct ext4_group_desc *bg, ext4_fsblk_t blk)
 {
-	bg->bg_block_bitmap = cpu_to_le32((u32)blk);
+	bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk);
 	if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT)
 		bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32);
 }
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 046a6a7..89d56c1 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -150,7 +150,7 @@ struct ext4_allocation_request {
  */
 struct ext4_group_desc
 {
-	__le32	bg_block_bitmap;	/* Blocks bitmap block */
+	__le32	bg_block_bitmap_lo;	/* Blocks bitmap block */
 	__le32	bg_inode_bitmap;	/* Inodes bitmap block */
 	__le32	bg_inode_table;		/* Inodes table block */
 	__le16	bg_free_blocks_count;	/* Free blocks count */
-- 
1.5.3.1.91.gd3392-dirty

[PATCH 2/7] ext4: Convert bg_inode_bitmap and bg_inode_table

[Aneesh Kumar K.V]

Convert bg_inode_bitmap and bg_inode_table to bg_inode_bitmap_lo
and bg_inode_table_lo.  This helps in finding BUGs due to
direct partial access of these split 64 bit values

Also fix one direct partial access

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 fs/ext4/balloc.c        |    2 +-
 fs/ext4/super.c         |   12 ++++++------
 include/linux/ext4_fs.h |    4 ++--
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 2a37635..b717a37 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -103,7 +103,7 @@ unsigned ext4_init_block_bitmap(struct super_block *sb, struct buffer_head *bh,
 		/* Set bits for block and inode bitmaps, and inode table */
 		ext4_set_bit(ext4_block_bitmap(sb, gdp) - start, bh->b_data);
 		ext4_set_bit(ext4_inode_bitmap(sb, gdp) - start, bh->b_data);
-		for (bit = le32_to_cpu(gdp->bg_inode_table) - start,
+		for (bit = (ext4_inode_table(sb, gdp) - start),
 		     bit_max = bit + sbi->s_itb_per_group; bit < bit_max; bit++)
 			ext4_set_bit(bit, bh->b_data);
 	}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index fd2a6a6..60050e2 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -78,17 +78,17 @@ ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
 ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
 			       struct ext4_group_desc *bg)
 {
-	return le32_to_cpu(bg->bg_inode_bitmap) |
+	return le32_to_cpu(bg->bg_inode_bitmap_lo) |
 		(EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ?
-		 (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0);
+		(ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0);
 }
 
 ext4_fsblk_t ext4_inode_table(struct super_block *sb,
 			      struct ext4_group_desc *bg)
 {
-	return le32_to_cpu(bg->bg_inode_table) |
+	return le32_to_cpu(bg->bg_inode_table_lo) |
 		(EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ?
-		 (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0);
+		(ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0);
 }
 
 void ext4_block_bitmap_set(struct super_block *sb,
@@ -102,7 +102,7 @@ void ext4_block_bitmap_set(struct super_block *sb,
 void ext4_inode_bitmap_set(struct super_block *sb,
 			   struct ext4_group_desc *bg, ext4_fsblk_t blk)
 {
-	bg->bg_inode_bitmap  = cpu_to_le32((u32)blk);
+	bg->bg_inode_bitmap_lo  = cpu_to_le32((u32)blk);
 	if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT)
 		bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32);
 }
@@ -110,7 +110,7 @@ void ext4_inode_bitmap_set(struct super_block *sb,
 void ext4_inode_table_set(struct super_block *sb,
 			  struct ext4_group_desc *bg, ext4_fsblk_t blk)
 {
-	bg->bg_inode_table = cpu_to_le32((u32)blk);
+	bg->bg_inode_table_lo = cpu_to_le32((u32)blk);
 	if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT)
 		bg->bg_inode_table_hi = cpu_to_le32(blk >> 32);
 }
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 89d56c1..411d259 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -151,8 +151,8 @@ struct ext4_allocation_request {
 struct ext4_group_desc
 {
 	__le32	bg_block_bitmap_lo;	/* Blocks bitmap block */
-	__le32	bg_inode_bitmap;	/* Inodes bitmap block */
-	__le32	bg_inode_table;		/* Inodes table block */
+	__le32	bg_inode_bitmap_lo;	/* Inodes bitmap block */
+	__le32	bg_inode_table_lo;	/* Inodes table block */
 	__le16	bg_free_blocks_count;	/* Free blocks count */
 	__le16	bg_free_inodes_count;	/* Free inodes count */
 	__le16	bg_used_dirs_count;	/* Directories count */
-- 
1.5.3.1.91.gd3392-dirty

[PATCH 3/7] ext4: Convert s_blocks_count to s_blocks_count_lo

[Aneesh Kumar K.V]

Convert s_blocks_count to s_blocks_count_lo
This helps in finding BUGs due to direct partial access of
these split 64 bit values

Also fix direct partial access in ext4 code

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 fs/ext4/mballoc.c       |    4 ++--
 fs/ext4/super.c         |    4 ++--
 include/linux/ext4_fs.h |    6 +++---
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index c4e6c92..5b804b2 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4036,7 +4036,7 @@ int ext4_mb_initialize_context(struct ext4_allocation_context *ac,
 	/* start searching from the goal */
 	goal = ar->goal;
 	if (goal < le32_to_cpu(es->s_first_data_block) ||
-			goal >= le32_to_cpu(es->s_blocks_count))
+			goal >= ext4_blocks_count(es))
 		goal = le32_to_cpu(es->s_first_data_block);
 	ext4_get_group_no_and_offset(sb, goal, &group, &block);
 
@@ -4337,7 +4337,7 @@ void ext4_mb_free_blocks(handle_t *handle, struct inode *inode,
 	es = EXT4_SB(sb)->s_es;
 	if (block < le32_to_cpu(es->s_first_data_block) ||
 	    block + count < block ||
-	    block + count > le32_to_cpu(es->s_blocks_count)) {
+	    block + count > ext4_blocks_count(es)) {
 		ext4_error(sb, __FUNCTION__,
 			    "Freeing blocks not in datazone - "
 			    "block = %lu, count = %lu", block, count);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 60050e2..0f38bd1 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2653,7 +2653,7 @@ static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf)
 
 	if (test_opt(sb, MINIX_DF)) {
 		sbi->s_overhead_last = 0;
-	} else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) {
+	} else if (sbi->s_blocks_last != ext4_blocks_count(es)) {
 		unsigned long ngroups = sbi->s_groups_count, i;
 		ext4_fsblk_t overhead = 0;
 		smp_rmb();
@@ -2688,7 +2688,7 @@ static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf)
 		overhead += ngroups * (2 + sbi->s_itb_per_group);
 		sbi->s_overhead_last = overhead;
 		smp_wmb();
-		sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count);
+		sbi->s_blocks_last = ext4_blocks_count(es);
 	}
 
 	buf->f_type = EXT4_SUPER_MAGIC;
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 411d259..7846558 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -563,7 +563,7 @@ do {									       \
  */
 struct ext4_super_block {
 /*00*/	__le32	s_inodes_count;		/* Inodes count */
-	__le32	s_blocks_count;		/* Blocks count */
+	__le32	s_blocks_count_lo;	/* Blocks count */
 	__le32	s_r_blocks_count;	/* Reserved blocks count */
 	__le32	s_free_blocks_count;	/* Free blocks count */
 /*10*/	__le32	s_free_inodes_count;	/* Free inodes count */
@@ -1067,7 +1067,7 @@ extern void ext4_inode_table_set(struct super_block *sb,
 static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es)
 {
 	return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) |
-		le32_to_cpu(es->s_blocks_count);
+		le32_to_cpu(es->s_blocks_count_lo);
 }
 
 static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es)
@@ -1085,7 +1085,7 @@ static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es)
 static inline void ext4_blocks_count_set(struct ext4_super_block *es,
 					 ext4_fsblk_t blk)
 {
-	es->s_blocks_count = cpu_to_le32((u32)blk);
+	es->s_blocks_count_lo = cpu_to_le32((u32)blk);
 	es->s_blocks_count_hi = cpu_to_le32(blk >> 32);
 }
 
-- 
1.5.3.1.91.gd3392-dirty

[PATCH 4/7] ext4: Convert s_r_blocks_count and s_free_blocks_count

[Aneesh Kumar K.V]

Convert s_r_blocks_count and s_free_blocks_count to
s_r_blocks_count_lo and s_free_blocks_count_lo

This helps in finding BUGs due to direct partial access of
these split 64 bit values

Also fix direct partial access in ext4 code

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 fs/ext4/super.c         |    2 +-
 include/linux/ext4_fs.h |   12 ++++++------
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 0f38bd1..3c7446d 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2695,7 +2695,7 @@ static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf)
 	buf->f_bsize = sb->s_blocksize;
 	buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last;
 	buf->f_bfree = percpu_counter_sum(&sbi->s_freeblocks_counter);
-	es->s_free_blocks_count = cpu_to_le32(buf->f_bfree);
+	ext4_free_blocks_count_set(es, buf->f_bfree);
 	buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es);
 	if (buf->f_bfree < ext4_r_blocks_count(es))
 		buf->f_bavail = 0;
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 7846558..74cf8a8 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -564,8 +564,8 @@ do {									       \
 struct ext4_super_block {
 /*00*/	__le32	s_inodes_count;		/* Inodes count */
 	__le32	s_blocks_count_lo;	/* Blocks count */
-	__le32	s_r_blocks_count;	/* Reserved blocks count */
-	__le32	s_free_blocks_count;	/* Free blocks count */
+	__le32	s_r_blocks_count_lo;	/* Reserved blocks count */
+	__le32	s_free_blocks_count_lo;	/* Free blocks count */
 /*10*/	__le32	s_free_inodes_count;	/* Free inodes count */
 	__le32	s_first_data_block;	/* First Data Block */
 	__le32	s_log_block_size;	/* Block size */
@@ -1073,13 +1073,13 @@ static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es)
 static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es)
 {
 	return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) |
-		le32_to_cpu(es->s_r_blocks_count);
+		le32_to_cpu(es->s_r_blocks_count_lo);
 }
 
 static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es)
 {
 	return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi) << 32) |
-		le32_to_cpu(es->s_free_blocks_count);
+		le32_to_cpu(es->s_free_blocks_count_lo);
 }
 
 static inline void ext4_blocks_count_set(struct ext4_super_block *es,
@@ -1092,14 +1092,14 @@ static inline void ext4_blocks_count_set(struct ext4_super_block *es,
 static inline void ext4_free_blocks_count_set(struct ext4_super_block *es,
 					      ext4_fsblk_t blk)
 {
-	es->s_free_blocks_count = cpu_to_le32((u32)blk);
+	es->s_free_blocks_count_lo = cpu_to_le32((u32)blk);
 	es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32);
 }
 
 static inline void ext4_r_blocks_count_set(struct ext4_super_block *es,
 					   ext4_fsblk_t blk)
 {
-	es->s_r_blocks_count = cpu_to_le32((u32)blk);
+	es->s_r_blocks_count_lo = cpu_to_le32((u32)blk);
 	es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32);
 }
 
-- 
1.5.3.1.91.gd3392-dirty

[PATCH 5/7] ext4: Convert ext4_extent.ee_start to ext4_extent.ee_start_lo

[Aneesh Kumar K.V]

Convert ext4_extent.ee_start to ext4_extent.ee_start_lo
This helps in finding BUGs due to direct partial access of
these split 48 bit values

Also fix direct partial access in ext4 code

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 fs/ext4/extents.c               |    8 +++-----
 fs/ext4/migrate.c               |    2 +-
 include/linux/ext4_fs_extents.h |    2 +-
 3 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 9ccdb85..e852c2c 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -52,7 +52,7 @@ static ext4_fsblk_t ext_pblock(struct ext4_extent *ex)
 {
 	ext4_fsblk_t block;
 
-	block = le32_to_cpu(ex->ee_start);
+	block = le32_to_cpu(ex->ee_start_lo);
 	block |= ((ext4_fsblk_t) le16_to_cpu(ex->ee_start_hi) << 31) << 1;
 	return block;
 }
@@ -77,7 +77,7 @@ static ext4_fsblk_t idx_pblock(struct ext4_extent_idx *ix)
  */
 static void ext4_ext_store_pblock(struct ext4_extent *ex, ext4_fsblk_t pb)
 {
-	ex->ee_start = cpu_to_le32((unsigned long) (pb & 0xffffffff));
+	ex->ee_start_lo = cpu_to_le32((unsigned long) (pb & 0xffffffff));
 	ex->ee_start_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
 }
 
@@ -1551,8 +1551,7 @@ has_space:
 	eh->eh_entries = cpu_to_le16(le16_to_cpu(eh->eh_entries)+1);
 	nearex = path[depth].p_ext;
 	nearex->ee_block = newext->ee_block;
-	nearex->ee_start = newext->ee_start;
-	nearex->ee_start_hi = newext->ee_start_hi;
+	ext4_ext_store_pblock(nearex, ext_pblock(newext));
 	nearex->ee_len = newext->ee_len;
 
 merge:
@@ -2321,7 +2320,6 @@ int ext4_ext_convert_to_initialized(handle_t *handle, struct inode *inode,
 	}
 	/* ex2: iblock to iblock + maxblocks-1 : initialised */
 	ex2->ee_block = cpu_to_le32(iblock);
-	ex2->ee_start = cpu_to_le32(newblock);
 	ext4_ext_store_pblock(ex2, newblock);
 	ex2->ee_len = cpu_to_le16(allocated);
 	if (ex2 != ex)
diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index 5efcdd0..3a597b5 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -24,7 +24,7 @@ struct list_blocks_struct {
 /* will go away */
 static void ext4_ext_store_pblock(struct ext4_extent *ex, ext4_fsblk_t pb)
 {
-	ex->ee_start = cpu_to_le32((unsigned long) (pb & 0xffffffff));
+	ex->ee_start_lo = cpu_to_le32((unsigned long) (pb & 0xffffffff));
 	ex->ee_start_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
 }
 
diff --git a/include/linux/ext4_fs_extents.h b/include/linux/ext4_fs_extents.h
index 5ed0891..016977b 100644
--- a/include/linux/ext4_fs_extents.h
+++ b/include/linux/ext4_fs_extents.h
@@ -74,7 +74,7 @@ struct ext4_extent {
 	__le32	ee_block;	/* first logical block extent covers */
 	__le16	ee_len;		/* number of blocks covered by extent */
 	__le16	ee_start_hi;	/* high 16 bits of physical block */
-	__le32	ee_start;	/* low 32 bits of physical block */
+	__le32	ee_start_lo;	/* low 32 bits of physical block */
 };
 
 /*
-- 
1.5.3.1.91.gd3392-dirty

[PATCH 6/7] ext4: Convert ext4_extent_idx.ei_leaf ext4_extent_idx.ei_leaf_lo

[Aneesh Kumar K.V]

Convert ext4_extent_idx.ei_leaf  ext4_extent_idx.ei_leaf_lo
This helps in finding BUGs due to direct partial access of
these split 48 bit values.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 fs/ext4/extents.c               |    4 ++--
 fs/ext4/migrate.c               |    2 +-
 include/linux/ext4_fs_extents.h |    2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index e852c2c..4da0090 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -65,7 +65,7 @@ static ext4_fsblk_t idx_pblock(struct ext4_extent_idx *ix)
 {
 	ext4_fsblk_t block;
 
-	block = le32_to_cpu(ix->ei_leaf);
+	block = le32_to_cpu(ix->ei_leaf_lo);
 	block |= ((ext4_fsblk_t) le16_to_cpu(ix->ei_leaf_hi) << 31) << 1;
 	return block;
 }
@@ -88,7 +88,7 @@ static void ext4_ext_store_pblock(struct ext4_extent *ex, ext4_fsblk_t pb)
  */
 static void ext4_idx_store_pblock(struct ext4_extent_idx *ix, ext4_fsblk_t pb)
 {
-	ix->ei_leaf = cpu_to_le32((unsigned long) (pb & 0xffffffff));
+	ix->ei_leaf_lo = cpu_to_le32((unsigned long) (pb & 0xffffffff));
 	ix->ei_leaf_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
 }
 
diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index 3a597b5..3a306b8 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -375,7 +375,7 @@ static ext4_fsblk_t idx_pblock(struct ext4_extent_idx *ix)
 {
 	ext4_fsblk_t block;
 
-	block = le32_to_cpu(ix->ei_leaf);
+	block = le32_to_cpu(ix->ei_leaf_lo);
 	block |= ((ext4_fsblk_t) le16_to_cpu(ix->ei_leaf_hi) << 31) << 1;
 	return block;
 }
diff --git a/include/linux/ext4_fs_extents.h b/include/linux/ext4_fs_extents.h
index 016977b..149fd4b 100644
--- a/include/linux/ext4_fs_extents.h
+++ b/include/linux/ext4_fs_extents.h
@@ -83,7 +83,7 @@ struct ext4_extent {
  */
 struct ext4_extent_idx {
 	__le32	ei_block;	/* index covers logical blocks from 'block' */
-	__le32	ei_leaf;	/* pointer to the physical block of the next *
+	__le32	ei_leaf_lo;	/* pointer to the physical block of the next *
 				 * level. leaf or next index could be there */
 	__le16	ei_leaf_hi;	/* high 16 bits of physical block */
 	__u16	ei_unused;
-- 
1.5.3.1.91.gd3392-dirty

[PATCH 7/7] ext4: sparse fixes

[Aneesh Kumar K.V]

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 fs/ext4/fsync.c |    2 +-
 fs/ext4/inode.c |    2 +-
 fs/ext4/xattr.c |    4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index 2a167d7..8d50879 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -47,7 +47,7 @@ int ext4_sync_file(struct file * file, struct dentry *dentry, int datasync)
 	struct inode *inode = dentry->d_inode;
 	int ret = 0;
 
-	J_ASSERT(ext4_journal_current_handle() == 0);
+	J_ASSERT(ext4_journal_current_handle() == NULL);
 
 	/*
 	 * data=writeback:
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 29dca87..c3fc63e 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -976,7 +976,7 @@ struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode,
 		}
 		if (buffer_new(&dummy)) {
 			J_ASSERT(create != 0);
-			J_ASSERT(handle != 0);
+			J_ASSERT(handle != NULL);
 
 			/*
 			 * Now that we do not always journal data, we should
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 0fbaa0e..d796213 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1120,7 +1120,7 @@ int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
 	int total_ino, total_blk;
 	void *base, *start, *end;
 	int extra_isize = 0, error = 0, tried_min_extra_isize = 0;
-	int s_min_extra_isize = EXT4_SB(inode->i_sb)->s_es->s_min_extra_isize;
+	int s_min_extra_isize = le16_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_min_extra_isize);
 
 	down_write(&EXT4_I(inode)->xattr_sem);
 retry:
@@ -1292,7 +1292,7 @@ retry:
 
 		i.name = b_entry_name;
 		i.value = buffer;
-		i.value_len = cpu_to_le32(size);
+		i.value_len = size;
 		error = ext4_xattr_block_find(inode, &i, bs);
 		if (error)
 			goto cleanup;
-- 
1.5.3.1.91.gd3392-dirty

[PATCH 1/7] ext4: Introduce le32_t and le16_t

[Aneesh Kumar K.V]

ext4 file system layout contain different split members
like bg_block_bitmap  and bg_block_bitmap_hi. Introduce
data type le32_t and le16_t to be used as the type of
these split members. This prevents these members frome
being accessed directly. Accesing them directly gives
a compiler warning. This helps in catching some BUGS
due to direct partial access of these split fields.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 fs/ext4/super.c           |    8 ++++----
 include/linux/ext4_fs.h   |    4 ++--
 include/linux/ext4_fs_i.h |    4 ++++
 3 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index d035653..c8f8e4d 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -70,9 +70,9 @@ static void ext4_write_super_lockfs(struct super_block *sb);
 ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
 			       struct ext4_group_desc *bg)
 {
-	return le32_to_cpu(bg->bg_block_bitmap) |
+	return le32_to_cpu(bg->bg_block_bitmap.value) |
 		(EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ?
-		 (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0);
+		 (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi.value) << 32 : 0);
 }
 
 ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
@@ -94,9 +94,9 @@ ext4_fsblk_t ext4_inode_table(struct super_block *sb,
 void ext4_block_bitmap_set(struct super_block *sb,
 			   struct ext4_group_desc *bg, ext4_fsblk_t blk)
 {
-	bg->bg_block_bitmap = cpu_to_le32((u32)blk);
+	bg->bg_block_bitmap.value = cpu_to_le32((u32)blk);
 	if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT)
-		bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32);
+		bg->bg_block_bitmap_hi.value = cpu_to_le32(blk >> 32);
 }
 
 void ext4_inode_bitmap_set(struct super_block *sb,
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 046a6a7..4494f8e 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -150,7 +150,7 @@ struct ext4_allocation_request {
  */
 struct ext4_group_desc
 {
-	__le32	bg_block_bitmap;	/* Blocks bitmap block */
+	le32_t	bg_block_bitmap;	/* Blocks bitmap block */
 	__le32	bg_inode_bitmap;	/* Inodes bitmap block */
 	__le32	bg_inode_table;		/* Inodes table block */
 	__le16	bg_free_blocks_count;	/* Free blocks count */
@@ -160,7 +160,7 @@ struct ext4_group_desc
 	__u32	bg_reserved[2];		/* Likely block/inode bitmap checksum */
 	__le16  bg_itable_unused;	/* Unused inodes count */
 	__le16  bg_checksum;		/* crc16(sb_uuid+group+desc) */
-	__le32	bg_block_bitmap_hi;	/* Blocks bitmap block MSB */
+	le32_t	bg_block_bitmap_hi;	/* Blocks bitmap block MSB */
 	__le32	bg_inode_bitmap_hi;	/* Inodes bitmap block MSB */
 	__le32	bg_inode_table_hi;	/* Inodes table block MSB */
 };
diff --git a/include/linux/ext4_fs_i.h b/include/linux/ext4_fs_i.h
index 22ba80e..d7eb271 100644
--- a/include/linux/ext4_fs_i.h
+++ b/include/linux/ext4_fs_i.h
@@ -27,6 +27,10 @@ typedef int ext4_grpblk_t;
 /* data type for filesystem-wide blocks number */
 typedef unsigned long long ext4_fsblk_t;
 
+/* data type to carry split 64 and 48 bits */
+typedef struct { __le16 value; } le16_t;
+typedef struct { __le32 value; } le32_t;
+
 struct ext4_reserve_window {
 	ext4_fsblk_t	_rsv_start;	/* First byte reserved */
 	ext4_fsblk_t	_rsv_end;	/* Last byte reserved or 0 */
-- 
1.5.3.1.91.gd3392-dirty

[PATCH 2/7] ext4: Convert bg_inode_bitmap and bg_inode_table to new type

[Aneesh Kumar K.V]

Convert bg_inode_bitmap and bg_inode_table to le32_t
This helps in finding BUGs due to direct partial access of
these split 64 bit values

Also fix one direct partial access

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 fs/ext4/balloc.c        |    2 +-
 fs/ext4/super.c         |   18 +++++++++---------
 include/linux/ext4_fs.h |    8 ++++----
 3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 2a37635..b717a37 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -103,7 +103,7 @@ unsigned ext4_init_block_bitmap(struct super_block *sb, struct buffer_head *bh,
 		/* Set bits for block and inode bitmaps, and inode table */
 		ext4_set_bit(ext4_block_bitmap(sb, gdp) - start, bh->b_data);
 		ext4_set_bit(ext4_inode_bitmap(sb, gdp) - start, bh->b_data);
-		for (bit = le32_to_cpu(gdp->bg_inode_table) - start,
+		for (bit = (ext4_inode_table(sb, gdp) - start),
 		     bit_max = bit + sbi->s_itb_per_group; bit < bit_max; bit++)
 			ext4_set_bit(bit, bh->b_data);
 	}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c8f8e4d..b9dda19 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -72,23 +72,23 @@ ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
 {
 	return le32_to_cpu(bg->bg_block_bitmap.value) |
 		(EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ?
-		 (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi.value) << 32 : 0);
+	 (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi.value) << 32 : 0);
 }
 
 ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
 			       struct ext4_group_desc *bg)
 {
-	return le32_to_cpu(bg->bg_inode_bitmap) |
+	return le32_to_cpu(bg->bg_inode_bitmap.value) |
 		(EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ?
-		 (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0);
+	 (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi.value) << 32 : 0);
 }
 
 ext4_fsblk_t ext4_inode_table(struct super_block *sb,
 			      struct ext4_group_desc *bg)
 {
-	return le32_to_cpu(bg->bg_inode_table) |
+	return le32_to_cpu(bg->bg_inode_table.value) |
 		(EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ?
-		 (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0);
+	 (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi.value) << 32 : 0);
 }
 
 void ext4_block_bitmap_set(struct super_block *sb,
@@ -102,17 +102,17 @@ void ext4_block_bitmap_set(struct super_block *sb,
 void ext4_inode_bitmap_set(struct super_block *sb,
 			   struct ext4_group_desc *bg, ext4_fsblk_t blk)
 {
-	bg->bg_inode_bitmap  = cpu_to_le32((u32)blk);
+	bg->bg_inode_bitmap.value  = cpu_to_le32((u32)blk);
 	if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT)
-		bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32);
+		bg->bg_inode_bitmap_hi.value = cpu_to_le32(blk >> 32);
 }
 
 void ext4_inode_table_set(struct super_block *sb,
 			  struct ext4_group_desc *bg, ext4_fsblk_t blk)
 {
-	bg->bg_inode_table = cpu_to_le32((u32)blk);
+	bg->bg_inode_table.value = cpu_to_le32((u32)blk);
 	if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT)
-		bg->bg_inode_table_hi = cpu_to_le32(blk >> 32);
+		bg->bg_inode_table_hi.value = cpu_to_le32(blk >> 32);
 }
 
 /*
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 4494f8e..84ef557 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -151,8 +151,8 @@ struct ext4_allocation_request {
 struct ext4_group_desc
 {
 	le32_t	bg_block_bitmap;	/* Blocks bitmap block */
-	__le32	bg_inode_bitmap;	/* Inodes bitmap block */
-	__le32	bg_inode_table;		/* Inodes table block */
+	le32_t	bg_inode_bitmap;	/* Inodes bitmap block */
+	le32_t	bg_inode_table;		/* Inodes table block */
 	__le16	bg_free_blocks_count;	/* Free blocks count */
 	__le16	bg_free_inodes_count;	/* Free inodes count */
 	__le16	bg_used_dirs_count;	/* Directories count */
@@ -161,8 +161,8 @@ struct ext4_group_desc
 	__le16  bg_itable_unused;	/* Unused inodes count */
 	__le16  bg_checksum;		/* crc16(sb_uuid+group+desc) */
 	le32_t	bg_block_bitmap_hi;	/* Blocks bitmap block MSB */
-	__le32	bg_inode_bitmap_hi;	/* Inodes bitmap block MSB */
-	__le32	bg_inode_table_hi;	/* Inodes table block MSB */
+	le32_t	bg_inode_bitmap_hi;	/* Inodes bitmap block MSB */
+	le32_t	bg_inode_table_hi;	/* Inodes table block MSB */
 };
 
 #define EXT4_BG_INODE_UNINIT	0x0001 /* Inode table/bitmap not in use */
-- 
1.5.3.1.91.gd3392-dirty

[PATCH 3/7] ext4: Convert s_blocks_count_hi and s_blocks_count to le32_t

[Aneesh Kumar K.V]

Convert s_blocks_count_hi and s_blocks_count to le32_t
This helps in finding BUGs due to direct partial access of
these split 64 bit values

Also fix direct partial access in ext4 code

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 fs/ext4/mballoc.c       |    4 ++--
 fs/ext4/super.c         |    4 ++--
 include/linux/ext4_fs.h |   12 ++++++------
 3 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index c4e6c92..5b804b2 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4036,7 +4036,7 @@ int ext4_mb_initialize_context(struct ext4_allocation_context *ac,
 	/* start searching from the goal */
 	goal = ar->goal;
 	if (goal < le32_to_cpu(es->s_first_data_block) ||
-			goal >= le32_to_cpu(es->s_blocks_count))
+			goal >= ext4_blocks_count(es))
 		goal = le32_to_cpu(es->s_first_data_block);
 	ext4_get_group_no_and_offset(sb, goal, &group, &block);
 
@@ -4337,7 +4337,7 @@ void ext4_mb_free_blocks(handle_t *handle, struct inode *inode,
 	es = EXT4_SB(sb)->s_es;
 	if (block < le32_to_cpu(es->s_first_data_block) ||
 	    block + count < block ||
-	    block + count > le32_to_cpu(es->s_blocks_count)) {
+	    block + count > ext4_blocks_count(es)) {
 		ext4_error(sb, __FUNCTION__,
 			    "Freeing blocks not in datazone - "
 			    "block = %lu, count = %lu", block, count);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index b9dda19..069d5f3 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2653,7 +2653,7 @@ static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf)
 
 	if (test_opt(sb, MINIX_DF)) {
 		sbi->s_overhead_last = 0;
-	} else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) {
+	} else if (sbi->s_blocks_last != ext4_blocks_count(es)) {
 		unsigned long ngroups = sbi->s_groups_count, i;
 		ext4_fsblk_t overhead = 0;
 		smp_rmb();
@@ -2688,7 +2688,7 @@ static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf)
 		overhead += ngroups * (2 + sbi->s_itb_per_group);
 		sbi->s_overhead_last = overhead;
 		smp_wmb();
-		sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count);
+		sbi->s_blocks_last = ext4_blocks_count(es);
 	}
 
 	buf->f_type = EXT4_SUPER_MAGIC;
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 84ef557..53a8665 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -563,7 +563,7 @@ do {									       \
  */
 struct ext4_super_block {
 /*00*/	__le32	s_inodes_count;		/* Inodes count */
-	__le32	s_blocks_count;		/* Blocks count */
+	le32_t	s_blocks_count;		/* Blocks count */
 	__le32	s_r_blocks_count;	/* Reserved blocks count */
 	__le32	s_free_blocks_count;	/* Free blocks count */
 /*10*/	__le32	s_free_inodes_count;	/* Free inodes count */
@@ -633,7 +633,7 @@ struct ext4_super_block {
 	__le32	s_mkfs_time;		/* When the filesystem was created */
 	__le32	s_jnl_blocks[17];	/* Backup of the journal inode */
 	/* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */
-/*150*/	__le32	s_blocks_count_hi;	/* Blocks count */
+/*150*/	le32_t	s_blocks_count_hi;	/* Blocks count */
 	__le32	s_r_blocks_count_hi;	/* Reserved blocks count */
 	__le32	s_free_blocks_count_hi;	/* Free blocks count */
 	__le16	s_min_extra_isize;	/* All inodes have at least # bytes */
@@ -1066,8 +1066,8 @@ extern void ext4_inode_table_set(struct super_block *sb,
 
 static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es)
 {
-	return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) |
-		le32_to_cpu(es->s_blocks_count);
+	return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi.value) << 32) |
+		le32_to_cpu(es->s_blocks_count.value);
 }
 
 static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es)
@@ -1085,8 +1085,8 @@ static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es)
 static inline void ext4_blocks_count_set(struct ext4_super_block *es,
 					 ext4_fsblk_t blk)
 {
-	es->s_blocks_count = cpu_to_le32((u32)blk);
-	es->s_blocks_count_hi = cpu_to_le32(blk >> 32);
+	es->s_blocks_count.value = cpu_to_le32((u32)blk);
+	es->s_blocks_count_hi.value = cpu_to_le32(blk >> 32);
 }
 
 static inline void ext4_free_blocks_count_set(struct ext4_super_block *es,
-- 
1.5.3.1.91.gd3392-dirty

[PATCH 4/7] ext4: Convert s_r_blocks_count[_hi] s_free_blocks_count[_hi] to le32_t

[Aneesh Kumar K.V]

Convert s_r_blocks_count[_hi] s_free_blocks_count[_hi] to le32_t
This helps in finding BUGs due to direct partial access of
these split 64 bit values

Also fix direct partial access in ext4 code

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 fs/ext4/super.c         |    2 +-
 include/linux/ext4_fs.h |   24 ++++++++++++------------
 2 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 069d5f3..8bc5afb 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2695,7 +2695,7 @@ static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf)
 	buf->f_bsize = sb->s_blocksize;
 	buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last;
 	buf->f_bfree = percpu_counter_sum(&sbi->s_freeblocks_counter);
-	es->s_free_blocks_count = cpu_to_le32(buf->f_bfree);
+	ext4_free_blocks_count_set(es, buf->f_bfree);
 	buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es);
 	if (buf->f_bfree < ext4_r_blocks_count(es))
 		buf->f_bavail = 0;
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 53a8665..b96e792 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -564,8 +564,8 @@ do {									       \
 struct ext4_super_block {
 /*00*/	__le32	s_inodes_count;		/* Inodes count */
 	le32_t	s_blocks_count;		/* Blocks count */
-	__le32	s_r_blocks_count;	/* Reserved blocks count */
-	__le32	s_free_blocks_count;	/* Free blocks count */
+	le32_t	s_r_blocks_count;	/* Reserved blocks count */
+	le32_t	s_free_blocks_count;	/* Free blocks count */
 /*10*/	__le32	s_free_inodes_count;	/* Free inodes count */
 	__le32	s_first_data_block;	/* First Data Block */
 	__le32	s_log_block_size;	/* Block size */
@@ -634,8 +634,8 @@ struct ext4_super_block {
 	__le32	s_jnl_blocks[17];	/* Backup of the journal inode */
 	/* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */
 /*150*/	le32_t	s_blocks_count_hi;	/* Blocks count */
-	__le32	s_r_blocks_count_hi;	/* Reserved blocks count */
-	__le32	s_free_blocks_count_hi;	/* Free blocks count */
+	le32_t	s_r_blocks_count_hi;	/* Reserved blocks count */
+	le32_t	s_free_blocks_count_hi;	/* Free blocks count */
 	__le16	s_min_extra_isize;	/* All inodes have at least # bytes */
 	__le16	s_want_extra_isize; 	/* New inodes should reserve # bytes */
 	__le32	s_flags;		/* Miscellaneous flags */
@@ -1072,14 +1072,14 @@ static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es)
 
 static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es)
 {
-	return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) |
-		le32_to_cpu(es->s_r_blocks_count);
+	return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi.value) << 32) |
+		le32_to_cpu(es->s_r_blocks_count.value);
 }
 
 static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es)
 {
-	return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi) << 32) |
-		le32_to_cpu(es->s_free_blocks_count);
+	return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi.value) << 32) |
+		le32_to_cpu(es->s_free_blocks_count.value);
 }
 
 static inline void ext4_blocks_count_set(struct ext4_super_block *es,
@@ -1092,15 +1092,15 @@ static inline void ext4_blocks_count_set(struct ext4_super_block *es,
 static inline void ext4_free_blocks_count_set(struct ext4_super_block *es,
 					      ext4_fsblk_t blk)
 {
-	es->s_free_blocks_count = cpu_to_le32((u32)blk);
-	es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32);
+	es->s_free_blocks_count.value = cpu_to_le32((u32)blk);
+	es->s_free_blocks_count_hi.value = cpu_to_le32(blk >> 32);
 }
 
 static inline void ext4_r_blocks_count_set(struct ext4_super_block *es,
 					   ext4_fsblk_t blk)
 {
-	es->s_r_blocks_count = cpu_to_le32((u32)blk);
-	es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32);
+	es->s_r_blocks_count.value = cpu_to_le32((u32)blk);
+	es->s_r_blocks_count_hi.value = cpu_to_le32(blk >> 32);
 }
 
 
-- 
1.5.3.1.91.gd3392-dirty

[PATCH 5/7] ext4: Convert ext4_extent.ee_start and ee_start_hi to le32_t and le16_t

[Aneesh Kumar K.V]

Convert ext4_extent.ee_start and ee_start_hi to le32_t and le16_t
This helps in finding BUGs due to direct partial access of
these split 48 bit values

Also fix direct partial access in ext4 code

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 fs/ext4/extents.c               |   12 +++++-------
 fs/ext4/migrate.c               |    4 ++--
 include/linux/ext4_fs_extents.h |    4 ++--
 3 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 9ccdb85..a7e70d8 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -52,8 +52,8 @@ static ext4_fsblk_t ext_pblock(struct ext4_extent *ex)
 {
 	ext4_fsblk_t block;
 
-	block = le32_to_cpu(ex->ee_start);
-	block |= ((ext4_fsblk_t) le16_to_cpu(ex->ee_start_hi) << 31) << 1;
+	block = le32_to_cpu(ex->ee_start.value);
+	block |= ((ext4_fsblk_t) le16_to_cpu(ex->ee_start_hi.value) << 31) << 1;
 	return block;
 }
 
@@ -77,8 +77,8 @@ static ext4_fsblk_t idx_pblock(struct ext4_extent_idx *ix)
  */
 static void ext4_ext_store_pblock(struct ext4_extent *ex, ext4_fsblk_t pb)
 {
-	ex->ee_start = cpu_to_le32((unsigned long) (pb & 0xffffffff));
-	ex->ee_start_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
+	ex->ee_start.value = cpu_to_le32((unsigned long) (pb & 0xffffffff));
+	ex->ee_start_hi.value = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
 }
 
 /*
@@ -1551,8 +1551,7 @@ has_space:
 	eh->eh_entries = cpu_to_le16(le16_to_cpu(eh->eh_entries)+1);
 	nearex = path[depth].p_ext;
 	nearex->ee_block = newext->ee_block;
-	nearex->ee_start = newext->ee_start;
-	nearex->ee_start_hi = newext->ee_start_hi;
+	ext4_ext_store_pblock(nearex, ext_pblock(newext));
 	nearex->ee_len = newext->ee_len;
 
 merge:
@@ -2321,7 +2320,6 @@ int ext4_ext_convert_to_initialized(handle_t *handle, struct inode *inode,
 	}
 	/* ex2: iblock to iblock + maxblocks-1 : initialised */
 	ex2->ee_block = cpu_to_le32(iblock);
-	ex2->ee_start = cpu_to_le32(newblock);
 	ext4_ext_store_pblock(ex2, newblock);
 	ex2->ee_len = cpu_to_le16(allocated);
 	if (ex2 != ex)
diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index 5efcdd0..2e9a807 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -24,8 +24,8 @@ struct list_blocks_struct {
 /* will go away */
 static void ext4_ext_store_pblock(struct ext4_extent *ex, ext4_fsblk_t pb)
 {
-	ex->ee_start = cpu_to_le32((unsigned long) (pb & 0xffffffff));
-	ex->ee_start_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
+	ex->ee_start.value = cpu_to_le32((unsigned long) (pb & 0xffffffff));
+	ex->ee_start_hi.value = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
 }
 
 static int finish_range(handle_t *handle, struct inode *inode,
diff --git a/include/linux/ext4_fs_extents.h b/include/linux/ext4_fs_extents.h
index 5ed0891..112926e 100644
--- a/include/linux/ext4_fs_extents.h
+++ b/include/linux/ext4_fs_extents.h
@@ -73,8 +73,8 @@
 struct ext4_extent {
 	__le32	ee_block;	/* first logical block extent covers */
 	__le16	ee_len;		/* number of blocks covered by extent */
-	__le16	ee_start_hi;	/* high 16 bits of physical block */
-	__le32	ee_start;	/* low 32 bits of physical block */
+	le16_t	ee_start_hi;	/* high 16 bits of physical block */
+	le32_t	ee_start;	/* low 32 bits of physical block */
 };
 
 /*
-- 
1.5.3.1.91.gd3392-dirty

[PATCH 6/7] ext4: Convert ext4_extent_idx.ei_leaf and ei_leaf_hi to le32_t and le16_t

[Aneesh Kumar K.V]

Convert ext4_extent_idx.ei_leaf and ei_leaf_hi to le32_t and le16_t
This helps in finding BUGs due to direct partial access of
these split 48 bit values

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 fs/ext4/extents.c               |    8 ++++----
 fs/ext4/migrate.c               |    4 ++--
 include/linux/ext4_fs_extents.h |    4 ++--
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index a7e70d8..858997b 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -65,8 +65,8 @@ static ext4_fsblk_t idx_pblock(struct ext4_extent_idx *ix)
 {
 	ext4_fsblk_t block;
 
-	block = le32_to_cpu(ix->ei_leaf);
-	block |= ((ext4_fsblk_t) le16_to_cpu(ix->ei_leaf_hi) << 31) << 1;
+	block = le32_to_cpu(ix->ei_leaf.value);
+	block |= ((ext4_fsblk_t) le16_to_cpu(ix->ei_leaf_hi.value) << 31) << 1;
 	return block;
 }
 
@@ -88,8 +88,8 @@ static void ext4_ext_store_pblock(struct ext4_extent *ex, ext4_fsblk_t pb)
  */
 static void ext4_idx_store_pblock(struct ext4_extent_idx *ix, ext4_fsblk_t pb)
 {
-	ix->ei_leaf = cpu_to_le32((unsigned long) (pb & 0xffffffff));
-	ix->ei_leaf_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
+	ix->ei_leaf.value = cpu_to_le32((unsigned long) (pb & 0xffffffff));
+	ix->ei_leaf_hi.value = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
 }
 
 static handle_t *ext4_ext_journal_restart(handle_t *handle, int needed)
diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index 2e9a807..6a4de2c 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -375,8 +375,8 @@ static ext4_fsblk_t idx_pblock(struct ext4_extent_idx *ix)
 {
 	ext4_fsblk_t block;
 
-	block = le32_to_cpu(ix->ei_leaf);
-	block |= ((ext4_fsblk_t) le16_to_cpu(ix->ei_leaf_hi) << 31) << 1;
+	block = le32_to_cpu(ix->ei_leaf.value);
+	block |= ((ext4_fsblk_t) le16_to_cpu(ix->ei_leaf_hi.value) << 31) << 1;
 	return block;
 }
 
diff --git a/include/linux/ext4_fs_extents.h b/include/linux/ext4_fs_extents.h
index 112926e..2930120 100644
--- a/include/linux/ext4_fs_extents.h
+++ b/include/linux/ext4_fs_extents.h
@@ -83,9 +83,9 @@ struct ext4_extent {
  */
 struct ext4_extent_idx {
 	__le32	ei_block;	/* index covers logical blocks from 'block' */
-	__le32	ei_leaf;	/* pointer to the physical block of the next *
+	le32_t	ei_leaf;	/* pointer to the physical block of the next *
 				 * level. leaf or next index could be there */
-	__le16	ei_leaf_hi;	/* high 16 bits of physical block */
+	le16_t	ei_leaf_hi;	/* high 16 bits of physical block */
 	__u16	ei_unused;
 };
 
-- 
1.5.3.1.91.gd3392-dirty

[PATCH 7/7] ext4: sparse fixes

[Aneesh Kumar K.V]

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 fs/ext4/fsync.c |    2 +-
 fs/ext4/xattr.c |    4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index 2a167d7..8d50879 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -47,7 +47,7 @@ int ext4_sync_file(struct file * file, struct dentry *dentry, int datasync)
 	struct inode *inode = dentry->d_inode;
 	int ret = 0;
 
-	J_ASSERT(ext4_journal_current_handle() == 0);
+	J_ASSERT(ext4_journal_current_handle() == NULL);
 
 	/*
 	 * data=writeback:
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 0fbaa0e..d796213 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1120,7 +1120,7 @@ int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
 	int total_ino, total_blk;
 	void *base, *start, *end;
 	int extra_isize = 0, error = 0, tried_min_extra_isize = 0;
-	int s_min_extra_isize = EXT4_SB(inode->i_sb)->s_es->s_min_extra_isize;
+	int s_min_extra_isize = le16_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_min_extra_isize);
 
 	down_write(&EXT4_I(inode)->xattr_sem);
 retry:
@@ -1292,7 +1292,7 @@ retry:
 
 		i.name = b_entry_name;
 		i.value = buffer;
-		i.value_len = cpu_to_le32(size);
+		i.value_len = size;
 		error = ext4_xattr_block_find(inode, &i, bs);
 		if (error)
 			goto cleanup;
-- 
1.5.3.1.91.gd3392-dirty