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Date:	Fri, 22 May 2015 13:21:54 +0200
From:	Jan Kara <jack@...e.cz>
To:	linux-ext4@...r.kernel.org
Cc:	Jan Kara <jack@...e.cz>
Subject: [PATCH 1/4] ext4: Support for checksumming from journal triggers

JBD2 layer support triggers which are called when journaling layer moves
buffer to a certain state. We can use the frozen trigger, which gets
called when buffer data is frozen and about to be written out to the
journal, to compute block checksums for some buffer types (similarly as
does ocfs2). This avoids unnecessary repeated recomputation of the
checksum (at the cost of larger window where memory corruption won't be
caught by checksumming) and is even necessary when there are
unsynchronized updaters of the checksummed data.

So add argument to ext4_journal_get_write_access() and
ext4_journal_get_create_access() which describes buffer type so that
triggers can be set accordingly. This patch is mostly only a change of
prototype of the above mentioned functions and a few small helpers. Real
checksumming will come later.

Signed-off-by: Jan Kara <jack@...e.cz>
---
 fs/ext4/ext4.h      | 26 +++++++++++++++++--
 fs/ext4/ext4_jbd2.c | 52 ++++++++++++++++++++++++++------------
 fs/ext4/ext4_jbd2.h | 18 ++++++++-----
 fs/ext4/extents.c   | 12 ++++++---
 fs/ext4/file.c      |  4 ++-
 fs/ext4/ialloc.c    | 19 +++++++++-----
 fs/ext4/indirect.c  | 15 +++++++----
 fs/ext4/inline.c    | 20 ++++++++++-----
 fs/ext4/inode.c     | 73 +++++++++++++++++++++++++++++++----------------------
 fs/ext4/ioctl.c     |  4 ++-
 fs/ext4/mballoc.c   | 15 ++++++-----
 fs/ext4/namei.c     | 45 +++++++++++++++++++++------------
 fs/ext4/resize.c    | 36 ++++++++++++++++----------
 fs/ext4/super.c     | 16 +++++++++++-
 fs/ext4/xattr.c     | 17 ++++++++-----
 15 files changed, 251 insertions(+), 121 deletions(-)

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 9a83f149ac85..01916e21b8fa 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1209,6 +1209,24 @@ struct ext4_super_block {
 /* Number of quota types we support */
 #define EXT4_MAXQUOTAS 2
 
+/* Types of ext4 journal triggers */
+enum ext4_journal_trigger_type {
+	EXT4_JTR_NONE	/* This must be the last entry for indexing to work! */
+};
+
+#define EXT4_JOURNAL_TRIGGER_COUNT EXT4_JTR_NONE
+
+struct ext4_journal_trigger {
+	struct jbd2_buffer_trigger_type tr_triggers;
+	struct super_block *sb;
+};
+
+static inline struct ext4_journal_trigger *EXT4_TRIGGER(
+				struct jbd2_buffer_trigger_type *trigger)
+{
+	return container_of(trigger, struct ext4_journal_trigger, tr_triggers);
+}
+
 /*
  * fourth extended-fs super-block data in memory
  */
@@ -1370,6 +1388,9 @@ struct ext4_sb_info {
 	struct mb_cache *s_mb_cache;
 	spinlock_t s_es_lock ____cacheline_aligned_in_smp;
 
+	/* Journal triggers for checksum computation */
+	struct ext4_journal_trigger s_journal_triggers[EXT4_JOURNAL_TRIGGER_COUNT];
+
 	/* Ratelimit ext4 messages. */
 	struct ratelimit_state s_err_ratelimit_state;
 	struct ratelimit_state s_warning_ratelimit_state;
@@ -2250,13 +2271,14 @@ int ext4_get_block(struct inode *inode, sector_t iblock,
 int ext4_da_get_block_prep(struct inode *inode, sector_t iblock,
 			   struct buffer_head *bh, int create);
 int ext4_walk_page_buffers(handle_t *handle,
+		 	   struct inode *inode,
 			   struct buffer_head *head,
 			   unsigned from,
 			   unsigned to,
 			   int *partial,
-			   int (*fn)(handle_t *handle,
+			   int (*fn)(handle_t *handle, struct inode *inode,
 				     struct buffer_head *bh));
-int do_journal_get_write_access(handle_t *handle,
+int do_journal_get_write_access(handle_t *handle, struct inode *inode,
 				struct buffer_head *bh);
 #define FALL_BACK_TO_NONDELALLOC 1
 #define CONVERT_INLINE_DATA	 2
diff --git a/fs/ext4/ext4_jbd2.c b/fs/ext4/ext4_jbd2.c
index d41843181818..a5e634a8e041 100644
--- a/fs/ext4/ext4_jbd2.c
+++ b/fs/ext4/ext4_jbd2.c
@@ -154,19 +154,29 @@ static void ext4_journal_abort_handle(const char *caller, unsigned int line,
 }
 
 int __ext4_journal_get_write_access(const char *where, unsigned int line,
-				    handle_t *handle, struct buffer_head *bh)
+				    handle_t *handle, struct super_block *sb,
+				    struct buffer_head *bh,
+				    enum ext4_journal_trigger_type trigger_type)
 {
-	int err = 0;
+	int err;
 
 	might_sleep();
 
-	if (ext4_handle_valid(handle)) {
-		err = jbd2_journal_get_write_access(handle, bh);
-		if (err)
-			ext4_journal_abort_handle(where, line, __func__, bh,
-						  handle, err);
+	if (!ext4_handle_valid(handle))
+		return 0;
+
+	err = jbd2_journal_get_write_access(handle, bh);
+	if (err) {
+		ext4_journal_abort_handle(where, line, __func__, bh, handle,
+					  err);
+		return err;
 	}
-	return err;
+	if (trigger_type == EXT4_JTR_NONE || !ext4_has_metadata_csum(sb))
+		return 0;
+	WARN_ON_ONCE(trigger_type >= EXT4_JOURNAL_TRIGGER_COUNT);
+	jbd2_journal_set_triggers(bh,
+		&EXT4_SB(sb)->s_journal_triggers[trigger_type].tr_triggers);
+	return 0;
 }
 
 /*
@@ -237,17 +247,27 @@ int __ext4_forget(const char *where, unsigned int line, handle_t *handle,
 }
 
 int __ext4_journal_get_create_access(const char *where, unsigned int line,
-				handle_t *handle, struct buffer_head *bh)
+				handle_t *handle, struct super_block *sb,
+				struct buffer_head *bh,
+				enum ext4_journal_trigger_type trigger_type)
 {
-	int err = 0;
+	int err;
 
-	if (ext4_handle_valid(handle)) {
-		err = jbd2_journal_get_create_access(handle, bh);
-		if (err)
-			ext4_journal_abort_handle(where, line, __func__,
-						  bh, handle, err);
+	if (!ext4_handle_valid(handle))
+		return 0;
+
+	err = jbd2_journal_get_create_access(handle, bh);
+	if (err) {
+		ext4_journal_abort_handle(where, line, __func__, bh, handle,
+					  err);
+		return err;
 	}
-	return err;
+	if (trigger_type == EXT4_JTR_NONE || !ext4_has_metadata_csum(sb))
+		return 0;
+	WARN_ON_ONCE(trigger_type >= EXT4_JOURNAL_TRIGGER_COUNT);
+	jbd2_journal_set_triggers(bh,
+		&EXT4_SB(sb)->s_journal_triggers[trigger_type].tr_triggers);
+	return 0;
 }
 
 int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h
index 9c5b49fb281e..c5ec6de3220e 100644
--- a/fs/ext4/ext4_jbd2.h
+++ b/fs/ext4/ext4_jbd2.h
@@ -232,14 +232,18 @@ int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode);
  * Wrapper functions with which ext4 calls into JBD.
  */
 int __ext4_journal_get_write_access(const char *where, unsigned int line,
-				    handle_t *handle, struct buffer_head *bh);
+				    handle_t *handle, struct super_block *sb,
+				    struct buffer_head *bh,
+				    enum ext4_journal_trigger_type trigger_type);
 
 int __ext4_forget(const char *where, unsigned int line, handle_t *handle,
 		  int is_metadata, struct inode *inode,
 		  struct buffer_head *bh, ext4_fsblk_t blocknr);
 
 int __ext4_journal_get_create_access(const char *where, unsigned int line,
-				handle_t *handle, struct buffer_head *bh);
+				handle_t *handle, struct super_block *sb,
+				struct buffer_head *bh,
+				enum ext4_journal_trigger_type trigger_type);
 
 int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
 				 handle_t *handle, struct inode *inode,
@@ -248,13 +252,15 @@ int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
 int __ext4_handle_dirty_super(const char *where, unsigned int line,
 			      handle_t *handle, struct super_block *sb);
 
-#define ext4_journal_get_write_access(handle, bh) \
-	__ext4_journal_get_write_access(__func__, __LINE__, (handle), (bh))
+#define ext4_journal_get_write_access(handle, sb, bh, trigger_type) \
+	__ext4_journal_get_write_access(__func__, __LINE__, (handle), (sb), \
+					(bh), (trigger_type))
 #define ext4_forget(handle, is_metadata, inode, bh, block_nr) \
 	__ext4_forget(__func__, __LINE__, (handle), (is_metadata), (inode), \
 		      (bh), (block_nr))
-#define ext4_journal_get_create_access(handle, bh) \
-	__ext4_journal_get_create_access(__func__, __LINE__, (handle), (bh))
+#define ext4_journal_get_create_access(handle, sb, bh, trigger_type) \
+	__ext4_journal_get_create_access(__func__, __LINE__, (handle), (sb), \
+					 (bh), (trigger_type))
 #define ext4_handle_dirty_metadata(handle, inode, bh) \
 	__ext4_handle_dirty_metadata(__func__, __LINE__, (handle), (inode), \
 				     (bh))
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index e003a1e81dc3..9d6200b1172a 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -142,7 +142,8 @@ static int ext4_ext_get_access(handle_t *handle, struct inode *inode,
 	if (path->p_bh) {
 		/* path points to block */
 		BUFFER_TRACE(path->p_bh, "get_write_access");
-		return ext4_journal_get_write_access(handle, path->p_bh);
+		return ext4_journal_get_write_access(handle, inode->i_sb,
+						     path->p_bh, EXT4_JTR_NONE);
 	}
 	/* path points to leaf/index in inode body */
 	/* we use in-core data, no need to protect them */
@@ -1095,7 +1096,8 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode,
 	}
 	lock_buffer(bh);
 
-	err = ext4_journal_get_create_access(handle, bh);
+	err = ext4_journal_get_create_access(handle, inode->i_sb, bh,
+					     EXT4_JTR_NONE);
 	if (err)
 		goto cleanup;
 
@@ -1168,7 +1170,8 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode,
 		}
 		lock_buffer(bh);
 
-		err = ext4_journal_get_create_access(handle, bh);
+		err = ext4_journal_get_create_access(handle, inode->i_sb, bh,
+						     EXT4_JTR_NONE);
 		if (err)
 			goto cleanup;
 
@@ -1287,7 +1290,8 @@ static int ext4_ext_grow_indepth(handle_t *handle, struct inode *inode,
 		return -ENOMEM;
 	lock_buffer(bh);
 
-	err = ext4_journal_get_create_access(handle, bh);
+	err = ext4_journal_get_create_access(handle, inode->i_sb, bh,
+					     EXT4_JTR_NONE);
 	if (err) {
 		unlock_buffer(bh);
 		goto out;
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 0613c256c344..a17673e8a904 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -267,7 +267,9 @@ static int ext4_file_open(struct inode * inode, struct file * filp)
 			if (IS_ERR(handle))
 				return PTR_ERR(handle);
 			BUFFER_TRACE(sbi->s_sbh, "get_write_access");
-			err = ext4_journal_get_write_access(handle, sbi->s_sbh);
+			err = ext4_journal_get_write_access(handle, sb,
+							    sbi->s_sbh,
+							    EXT4_JTR_NONE);
 			if (err) {
 				ext4_journal_stop(handle);
 				return err;
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 1eaa6cb96cd0..286e9fe3c659 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -290,7 +290,8 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
 		goto error_return;
 
 	BUFFER_TRACE(bitmap_bh, "get_write_access");
-	fatal = ext4_journal_get_write_access(handle, bitmap_bh);
+	fatal = ext4_journal_get_write_access(handle, sb, bitmap_bh,
+					      EXT4_JTR_NONE);
 	if (fatal)
 		goto error_return;
 
@@ -298,7 +299,8 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
 	gdp = ext4_get_group_desc(sb, block_group, &bh2);
 	if (gdp) {
 		BUFFER_TRACE(bh2, "get_write_access");
-		fatal = ext4_journal_get_write_access(handle, bh2);
+		fatal = ext4_journal_get_write_access(handle, sb, bh2,
+						      EXT4_JTR_NONE);
 	}
 	ext4_lock_group(sb, block_group);
 	cleared = ext4_test_and_clear_bit(bit, bitmap_bh->b_data);
@@ -844,7 +846,8 @@ repeat_in_this_group:
 			}
 		}
 		BUFFER_TRACE(inode_bitmap_bh, "get_write_access");
-		err = ext4_journal_get_write_access(handle, inode_bitmap_bh);
+		err = ext4_journal_get_write_access(handle, sb, inode_bitmap_bh,
+						    EXT4_JTR_NONE);
 		if (err) {
 			ext4_std_error(sb, err);
 			goto out;
@@ -874,7 +877,8 @@ got:
 	}
 
 	BUFFER_TRACE(group_desc_bh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, group_desc_bh);
+	err = ext4_journal_get_write_access(handle, sb, group_desc_bh,
+					    EXT4_JTR_NONE);
 	if (err) {
 		ext4_std_error(sb, err);
 		goto out;
@@ -891,7 +895,8 @@ got:
 			goto out;
 		}
 		BUFFER_TRACE(block_bitmap_bh, "get block bitmap access");
-		err = ext4_journal_get_write_access(handle, block_bitmap_bh);
+		err = ext4_journal_get_write_access(handle, sb, block_bitmap_bh,
+						    EXT4_JTR_NONE);
 		if (err) {
 			brelse(block_bitmap_bh);
 			ext4_std_error(sb, err);
@@ -1310,8 +1315,8 @@ int ext4_init_inode_table(struct super_block *sb, ext4_group_t group,
 	num = sbi->s_itb_per_group - used_blks;
 
 	BUFFER_TRACE(group_desc_bh, "get_write_access");
-	ret = ext4_journal_get_write_access(handle,
-					    group_desc_bh);
+	ret = ext4_journal_get_write_access(handle, sb, group_desc_bh,
+					    EXT4_JTR_NONE);
 	if (ret)
 		goto err_out;
 
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 958824019509..9f015a9f86a4 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -351,7 +351,8 @@ static int ext4_alloc_branch(handle_t *handle,
 		}
 		lock_buffer(bh);
 		BUFFER_TRACE(bh, "call get_create_access");
-		err = ext4_journal_get_create_access(handle, bh);
+		err = ext4_journal_get_create_access(handle, ar->inode->i_sb,
+						     bh, EXT4_JTR_NONE);
 		if (err) {
 			unlock_buffer(bh);
 			goto failed;
@@ -423,7 +424,8 @@ static int ext4_splice_branch(handle_t *handle,
 	 */
 	if (where->bh) {
 		BUFFER_TRACE(where->bh, "get_write_access");
-		err = ext4_journal_get_write_access(handle, where->bh);
+		err = ext4_journal_get_write_access(handle, ar->inode->i_sb,
+						    where->bh, EXT4_JTR_NONE);
 		if (err)
 			goto err_out;
 	}
@@ -968,7 +970,8 @@ static int ext4_clear_blocks(handle_t *handle, struct inode *inode,
 			goto out_err;
 		if (bh) {
 			BUFFER_TRACE(bh, "retaking write access");
-			err = ext4_journal_get_write_access(handle, bh);
+			err = ext4_journal_get_write_access(handle, inode->i_sb,
+							    bh, EXT4_JTR_NONE);
 			if (unlikely(err))
 				goto out_err;
 		}
@@ -1019,7 +1022,8 @@ static void ext4_free_data(handle_t *handle, struct inode *inode,
 
 	if (this_bh) {				/* For indirect block */
 		BUFFER_TRACE(this_bh, "get_write_access");
-		err = ext4_journal_get_write_access(handle, this_bh);
+		err = ext4_journal_get_write_access(handle, inode->i_sb,
+						    this_bh, EXT4_JTR_NONE);
 		/* Important: if we can't update the indirect pointers
 		 * to the blocks, we can't free them. */
 		if (err)
@@ -1183,7 +1187,8 @@ static void ext4_free_branches(handle_t *handle, struct inode *inode,
 				 */
 				BUFFER_TRACE(parent_bh, "get_write_access");
 				if (!ext4_journal_get_write_access(handle,
-								   parent_bh)){
+						inode->i_sb, parent_bh,
+						EXT4_JTR_NONE)) {
 					*p = 0;
 					BUFFER_TRACE(parent_bh,
 					"call ext4_handle_dirty_metadata");
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 095c7a258d97..7afd64c613e4 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -261,7 +261,8 @@ static int ext4_create_inline_data(handle_t *handle,
 		return error;
 
 	BUFFER_TRACE(is.iloc.bh, "get_write_access");
-	error = ext4_journal_get_write_access(handle, is.iloc.bh);
+	error = ext4_journal_get_write_access(handle, inode->i_sb, is.iloc.bh,
+					      EXT4_JTR_NONE);
 	if (error)
 		goto out;
 
@@ -345,7 +346,8 @@ static int ext4_update_inline_data(handle_t *handle, struct inode *inode,
 		goto out;
 
 	BUFFER_TRACE(is.iloc.bh, "get_write_access");
-	error = ext4_journal_get_write_access(handle, is.iloc.bh);
+	error = ext4_journal_get_write_access(handle, inode->i_sb, is.iloc.bh,
+					      EXT4_JTR_NONE);
 	if (error)
 		goto out;
 
@@ -423,7 +425,8 @@ static int ext4_destroy_inline_data_nolock(handle_t *handle,
 		goto out;
 
 	BUFFER_TRACE(is.iloc.bh, "get_write_access");
-	error = ext4_journal_get_write_access(handle, is.iloc.bh);
+	error = ext4_journal_get_write_access(handle, inode->i_sb, is.iloc.bh,
+					      EXT4_JTR_NONE);
 	if (error)
 		goto out;
 
@@ -588,7 +591,7 @@ retry:
 		ret = __block_write_begin(page, from, to, ext4_get_block);
 
 	if (!ret && ext4_should_journal_data(inode)) {
-		ret = ext4_walk_page_buffers(handle, page_buffers(page),
+		ret = ext4_walk_page_buffers(handle, inode, page_buffers(page),
 					     from, to, NULL,
 					     do_journal_get_write_access);
 	}
@@ -1013,7 +1016,8 @@ static int ext4_add_dirent_to_inline(handle_t *handle,
 		return err;
 
 	BUFFER_TRACE(iloc->bh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, iloc->bh);
+	err = ext4_journal_get_write_access(handle, dir->i_sb, iloc->bh,
+					    EXT4_JTR_NONE);
 	if (err)
 		return err;
 	ext4_insert_dentry(dir, inode, de, inline_size, &dentry->d_name,
@@ -1214,7 +1218,8 @@ static int ext4_convert_inline_data_nolock(handle_t *handle,
 	}
 
 	lock_buffer(data_bh);
-	error = ext4_journal_get_create_access(handle, data_bh);
+	error = ext4_journal_get_create_access(handle, inode->i_sb, data_bh,
+					       EXT4_JTR_NONE);
 	if (error) {
 		unlock_buffer(data_bh);
 		error = -EIO;
@@ -1691,7 +1696,8 @@ int ext4_delete_inline_entry(handle_t *handle,
 	}
 
 	BUFFER_TRACE(bh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, bh);
+	err = ext4_journal_get_write_access(handle, dir->i_sb, bh,
+					    EXT4_JTR_NONE);
 	if (err)
 		goto out;
 
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 0554b0b5957b..bb53854c9908 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -131,7 +131,6 @@ static inline int ext4_begin_ordered_truncate(struct inode *inode,
 static void ext4_invalidatepage(struct page *page, unsigned int offset,
 				unsigned int length);
 static int __ext4_journalled_writepage(struct page *page, unsigned int len);
-static int ext4_bh_delay_or_unwritten(handle_t *handle, struct buffer_head *bh);
 static int ext4_meta_trans_blocks(struct inode *inode, int lblocks,
 				  int pextents);
 
@@ -765,7 +764,8 @@ struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode,
 		 */
 		lock_buffer(bh);
 		BUFFER_TRACE(bh, "call get_create_access");
-		err = ext4_journal_get_create_access(handle, bh);
+		err = ext4_journal_get_create_access(handle, inode->i_sb, bh,
+						     EXT4_JTR_NONE);
 		if (unlikely(err)) {
 			unlock_buffer(bh);
 			goto errout;
@@ -805,12 +805,12 @@ struct buffer_head *ext4_bread(handle_t *handle, struct inode *inode,
 	return ERR_PTR(-EIO);
 }
 
-int ext4_walk_page_buffers(handle_t *handle,
+int ext4_walk_page_buffers(handle_t *handle, struct inode *inode,
 			   struct buffer_head *head,
 			   unsigned from,
 			   unsigned to,
 			   int *partial,
-			   int (*fn)(handle_t *handle,
+			   int (*fn)(handle_t *handle, struct inode *inode,
 				     struct buffer_head *bh))
 {
 	struct buffer_head *bh;
@@ -829,7 +829,7 @@ int ext4_walk_page_buffers(handle_t *handle,
 				*partial = 1;
 			continue;
 		}
-		err = (*fn)(handle, bh);
+		err = (*fn)(handle, inode, bh);
 		if (!ret)
 			ret = err;
 	}
@@ -860,7 +860,7 @@ int ext4_walk_page_buffers(handle_t *handle,
  * is elevated.  We'll still have enough credits for the tiny quotafile
  * write.
  */
-int do_journal_get_write_access(handle_t *handle,
+int do_journal_get_write_access(handle_t *handle, struct inode *inode,
 				struct buffer_head *bh)
 {
 	int dirty = buffer_dirty(bh);
@@ -879,7 +879,8 @@ int do_journal_get_write_access(handle_t *handle,
 	if (dirty)
 		clear_buffer_dirty(bh);
 	BUFFER_TRACE(bh, "get write access");
-	ret = ext4_journal_get_write_access(handle, bh);
+	ret = ext4_journal_get_write_access(handle, inode->i_sb, bh,
+					    EXT4_JTR_NONE);
 	if (!ret && dirty)
 		ret = ext4_handle_dirty_metadata(handle, NULL, bh);
 	return ret;
@@ -1052,8 +1053,8 @@ retry_journal:
 		ret = __block_write_begin(page, pos, len, ext4_get_block);
 #endif
 	if (!ret && ext4_should_journal_data(inode)) {
-		ret = ext4_walk_page_buffers(handle, page_buffers(page),
-					     from, to, NULL,
+		ret = ext4_walk_page_buffers(handle, inode,
+					     page_buffers(page), from, to, NULL,
 					     do_journal_get_write_access);
 	}
 
@@ -1094,7 +1095,8 @@ retry_journal:
 }
 
 /* For write_end() in data=journal mode */
-static int write_end_fn(handle_t *handle, struct buffer_head *bh)
+static int write_end_fn(handle_t *handle, struct inode *inode,
+			struct buffer_head *bh)
 {
 	int ret;
 	if (!buffer_mapped(bh) || buffer_freed(bh))
@@ -1216,8 +1218,8 @@ static int ext4_journalled_write_end(struct file *file,
 			page_zero_new_buffers(page, from+copied, to);
 		}
 
-		ret = ext4_walk_page_buffers(handle, page_buffers(page), from,
-					     to, &partial, write_end_fn);
+		ret = ext4_walk_page_buffers(handle, inode, page_buffers(page),
+					     from, to, &partial, write_end_fn);
 		if (!partial)
 			SetPageUptodate(page);
 	}
@@ -1473,7 +1475,8 @@ static void ext4_print_free_blocks(struct inode *inode)
 	return;
 }
 
-static int ext4_bh_delay_or_unwritten(handle_t *handle, struct buffer_head *bh)
+static int ext4_bh_delay_or_unwritten(handle_t *handle, struct inode *inode,
+				      struct buffer_head *bh)
 {
 	return (buffer_delay(bh) || buffer_unwritten(bh)) && buffer_dirty(bh);
 }
@@ -1661,13 +1664,15 @@ int ext4_da_get_block_prep(struct inode *inode, sector_t iblock,
 	return 0;
 }
 
-static int bget_one(handle_t *handle, struct buffer_head *bh)
+static int bget_one(handle_t *handle, struct inode *inode,
+		    struct buffer_head *bh)
 {
 	get_bh(bh);
 	return 0;
 }
 
-static int bput_one(handle_t *handle, struct buffer_head *bh)
+static int bput_one(handle_t *handle, struct inode *inode,
+		    struct buffer_head *bh)
 {
 	put_bh(bh);
 	return 0;
@@ -1698,7 +1703,7 @@ static int __ext4_journalled_writepage(struct page *page,
 			BUG();
 			goto out;
 		}
-		ext4_walk_page_buffers(handle, page_bufs, 0, len,
+		ext4_walk_page_buffers(handle, inode, page_bufs, 0, len,
 				       NULL, bget_one);
 	}
 	/* As soon as we unlock the page, it can go away, but we have
@@ -1716,16 +1721,17 @@ static int __ext4_journalled_writepage(struct page *page,
 
 	if (inline_data) {
 		BUFFER_TRACE(inode_bh, "get write access");
-		ret = ext4_journal_get_write_access(handle, inode_bh);
+		ret = ext4_journal_get_write_access(handle, inode->i_sb,
+						    inode_bh, EXT4_JTR_NONE);
 
 		err = ext4_handle_dirty_metadata(handle, inode, inode_bh);
 
 	} else {
-		ret = ext4_walk_page_buffers(handle, page_bufs, 0, len, NULL,
-					     do_journal_get_write_access);
+		ret = ext4_walk_page_buffers(handle, inode, page_bufs, 0, len,
+					     NULL, do_journal_get_write_access);
 
-		err = ext4_walk_page_buffers(handle, page_bufs, 0, len, NULL,
-					     write_end_fn);
+		err = ext4_walk_page_buffers(handle, inode, page_bufs, 0, len,
+					     NULL, write_end_fn);
 	}
 	if (ret == 0)
 		ret = err;
@@ -1735,7 +1741,7 @@ static int __ext4_journalled_writepage(struct page *page,
 		ret = err;
 
 	if (!ext4_has_inline_data(inode))
-		ext4_walk_page_buffers(NULL, page_bufs, 0, len,
+		ext4_walk_page_buffers(NULL, inode, page_bufs, 0, len,
 				       NULL, bput_one);
 	ext4_set_inode_state(inode, EXT4_STATE_JDATA);
 out:
@@ -1810,7 +1816,7 @@ static int ext4_writepage(struct page *page,
 	 * journal_submit_inode_data_buffers() and in that case we must write
 	 * allocated buffers to achieve data=ordered mode guarantees.
 	 */
-	if (ext4_walk_page_buffers(NULL, page_bufs, 0, len, NULL,
+	if (ext4_walk_page_buffers(NULL, inode, page_bufs, 0, len, NULL,
 				   ext4_bh_delay_or_unwritten)) {
 		redirty_page_for_writepage(wbc, page);
 		if (current->flags & PF_MEMALLOC) {
@@ -3381,7 +3387,8 @@ static int __ext4_block_zero_page_range(handle_t *handle,
 	}
 	if (ext4_should_journal_data(inode)) {
 		BUFFER_TRACE(bh, "get write access");
-		err = ext4_journal_get_write_access(handle, bh);
+		err = ext4_journal_get_write_access(handle, inode->i_sb, bh,
+						    EXT4_JTR_NONE);
 		if (err)
 			goto unlock;
 	}
@@ -4476,7 +4483,9 @@ static int ext4_do_update_inode(handle_t *handle,
 	ext4_clear_inode_state(inode, EXT4_STATE_NEW);
 	if (set_large_file) {
 		BUFFER_TRACE(EXT4_SB(sb)->s_sbh, "get write access");
-		err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh);
+		err = ext4_journal_get_write_access(handle, sb,
+						    EXT4_SB(sb)->s_sbh,
+						    EXT4_JTR_NONE);
 		if (err)
 			goto out_brelse;
 		ext4_update_dynamic_rev(sb);
@@ -4942,7 +4951,8 @@ ext4_reserve_inode_write(handle_t *handle, struct inode *inode,
 	err = ext4_get_inode_loc(inode, iloc);
 	if (!err) {
 		BUFFER_TRACE(iloc->bh, "get_write_access");
-		err = ext4_journal_get_write_access(handle, iloc->bh);
+		err = ext4_journal_get_write_access(handle, inode->i_sb,
+						    iloc->bh, EXT4_JTR_NONE);
 		if (err) {
 			brelse(iloc->bh);
 			iloc->bh = NULL;
@@ -5095,7 +5105,9 @@ static int ext4_pin_inode(handle_t *handle, struct inode *inode)
 		err = ext4_get_inode_loc(inode, &iloc);
 		if (!err) {
 			BUFFER_TRACE(iloc.bh, "get_write_access");
-			err = jbd2_journal_get_write_access(handle, iloc.bh);
+			err = jbd2_journal_get_write_access(inode->i_sb, handle,
+							    iloc.bh,
+							    EXT4_JTR_NONE);
 			if (!err)
 				err = ext4_handle_dirty_metadata(handle,
 								 NULL,
@@ -5185,7 +5197,8 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
 	return err;
 }
 
-static int ext4_bh_unmapped(handle_t *handle, struct buffer_head *bh)
+static int ext4_bh_unmapped(handle_t *handle, struct inode *inode,
+			    struct buffer_head *bh)
 {
 	return !buffer_mapped(bh);
 }
@@ -5235,7 +5248,7 @@ int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 	 * journal_start/journal_stop which can block and take a long time
 	 */
 	if (page_has_buffers(page)) {
-		if (!ext4_walk_page_buffers(NULL, page_buffers(page),
+		if (!ext4_walk_page_buffers(NULL, inode, page_buffers(page),
 					    0, len, NULL,
 					    ext4_bh_unmapped)) {
 			/* Wait so that we don't change page under IO */
@@ -5259,7 +5272,7 @@ retry_alloc:
 	}
 	ret = __block_page_mkwrite(vma, vmf, get_block);
 	if (!ret && ext4_should_journal_data(inode)) {
-		if (ext4_walk_page_buffers(handle, page_buffers(page), 0,
+		if (ext4_walk_page_buffers(handle, inode, page_buffers(page), 0,
 			  PAGE_CACHE_SIZE, NULL, do_journal_get_write_access)) {
 			unlock_page(page);
 			ret = VM_FAULT_SIGBUS;
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 2cb9e178d1c5..b5d9c87ecef9 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -660,7 +660,9 @@ encryption_policy_out:
 				err = PTR_ERR(handle);
 				goto pwsalt_err_exit;
 			}
-			err = ext4_journal_get_write_access(handle, sbi->s_sbh);
+			err = ext4_journal_get_write_access(handle, sb,
+							    sbi->s_sbh,
+							    EXT4_JTR_NONE);
 			if (err)
 				goto pwsalt_err_journal;
 			generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 8d1e60214ef0..524903fbd972 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2886,7 +2886,8 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
 		goto out_err;
 
 	BUFFER_TRACE(bitmap_bh, "getting write access");
-	err = ext4_journal_get_write_access(handle, bitmap_bh);
+	err = ext4_journal_get_write_access(handle, sb, bitmap_bh,
+					    EXT4_JTR_NONE);
 	if (err)
 		goto out_err;
 
@@ -2899,7 +2900,7 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
 			ext4_free_group_clusters(sb, gdp));
 
 	BUFFER_TRACE(gdp_bh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, gdp_bh);
+	err = ext4_journal_get_write_access(handle, sb, gdp_bh, EXT4_JTR_NONE);
 	if (err)
 		goto out_err;
 
@@ -4769,7 +4770,8 @@ do_more:
 	}
 
 	BUFFER_TRACE(bitmap_bh, "getting write access");
-	err = ext4_journal_get_write_access(handle, bitmap_bh);
+	err = ext4_journal_get_write_access(handle, sb, bitmap_bh,
+					    EXT4_JTR_NONE);
 	if (err)
 		goto error_return;
 
@@ -4779,7 +4781,7 @@ do_more:
 	 * using it
 	 */
 	BUFFER_TRACE(gd_bh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, gd_bh);
+	err = ext4_journal_get_write_access(handle, sb, gd_bh, EXT4_JTR_NONE);
 	if (err)
 		goto error_return;
 #ifdef AGGRESSIVE_CHECK
@@ -4945,7 +4947,8 @@ int ext4_group_add_blocks(handle_t *handle, struct super_block *sb,
 	}
 
 	BUFFER_TRACE(bitmap_bh, "getting write access");
-	err = ext4_journal_get_write_access(handle, bitmap_bh);
+	err = ext4_journal_get_write_access(handle, sb, bitmap_bh,
+					    EXT4_JTR_NONE);
 	if (err)
 		goto error_return;
 
@@ -4955,7 +4958,7 @@ int ext4_group_add_blocks(handle_t *handle, struct super_block *sb,
 	 * using it
 	 */
 	BUFFER_TRACE(gd_bh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, gd_bh);
+	err = ext4_journal_get_write_access(handle, sb, gd_bh, EXT4_JTR_NONE);
 	if (err)
 		goto error_return;
 
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 814f3beb4369..225890c8289e 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -67,7 +67,8 @@ static struct buffer_head *ext4_append(handle_t *handle,
 	inode->i_size += inode->i_sb->s_blocksize;
 	EXT4_I(inode)->i_disksize = inode->i_size;
 	BUFFER_TRACE(bh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, bh);
+	err = ext4_journal_get_write_access(handle, inode->i_sb, bh,
+					    EXT4_JTR_NONE);
 	if (err) {
 		brelse(bh);
 		ext4_std_error(inode->i_sb, err);
@@ -1711,12 +1712,14 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
 	}
 
 	BUFFER_TRACE(*bh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, *bh);
+	err = ext4_journal_get_write_access(handle, dir->i_sb, *bh,
+					    EXT4_JTR_NONE);
 	if (err)
 		goto journal_error;
 
 	BUFFER_TRACE(frame->bh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, frame->bh);
+	err = ext4_journal_get_write_access(handle, dir->i_sb, frame->bh,
+					    EXT4_JTR_NONE);
 	if (err)
 		goto journal_error;
 
@@ -1946,7 +1949,8 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
 			return err;
 	}
 	BUFFER_TRACE(bh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, bh);
+	err = ext4_journal_get_write_access(handle, dir->i_sb, bh,
+					    EXT4_JTR_NONE);
 	if (err) {
 		ext4_std_error(dir->i_sb, err);
 		return err;
@@ -2023,7 +2027,8 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
 	blocksize =  dir->i_sb->s_blocksize;
 	dxtrace(printk(KERN_DEBUG "Creating index: inode %lu\n", dir->i_ino));
 	BUFFER_TRACE(bh, "get_write_access");
-	retval = ext4_journal_get_write_access(handle, bh);
+	retval = ext4_journal_get_write_access(handle, dir->i_sb, bh,
+					       EXT4_JTR_NONE);
 	if (retval) {
 		ext4_std_error(dir->i_sb, retval);
 		brelse(bh);
@@ -2245,7 +2250,7 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
 	}
 
 	BUFFER_TRACE(bh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, bh);
+	err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE);
 	if (err)
 		goto journal_error;
 
@@ -2282,7 +2287,8 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
 		node2->fake.rec_len = ext4_rec_len_to_disk(sb->s_blocksize,
 							   sb->s_blocksize);
 		BUFFER_TRACE(frame->bh, "get_write_access");
-		err = ext4_journal_get_write_access(handle, frame->bh);
+		err = ext4_journal_get_write_access(handle, sb, frame->bh,
+						    EXT4_JTR_NONE);
 		if (err)
 			goto journal_error;
 		if (levels) {
@@ -2292,8 +2298,9 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
 				       icount1, icount2));
 
 			BUFFER_TRACE(frame->bh, "get_write_access"); /* index root */
-			err = ext4_journal_get_write_access(handle,
-							     frames[0].bh);
+			err = ext4_journal_get_write_access(handle, sb,
+							    frames[0].bh,
+							    EXT4_JTR_NONE);
 			if (err)
 				goto journal_error;
 
@@ -2334,8 +2341,9 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
 			frame->at = at = at - entries + entries2;
 			frame->entries = entries = entries2;
 			frame->bh = bh2;
-			err = ext4_journal_get_write_access(handle,
-							     frame->bh);
+			err = ext4_journal_get_write_access(handle, sb,
+							    frame->bh,
+							    EXT4_JTR_NONE);
 			if (err)
 				goto journal_error;
 		}
@@ -2423,7 +2431,8 @@ static int ext4_delete_entry(handle_t *handle,
 		csum_size = sizeof(struct ext4_dir_entry_tail);
 
 	BUFFER_TRACE(bh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, bh);
+	err = ext4_journal_get_write_access(handle, dir->i_sb, bh,
+					    EXT4_JTR_NONE);
 	if (unlikely(err))
 		goto out;
 
@@ -2862,7 +2871,8 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode)
 		  S_ISLNK(inode->i_mode)) || inode->i_nlink == 0);
 
 	BUFFER_TRACE(sbi->s_sbh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, sbi->s_sbh);
+	err = ext4_journal_get_write_access(handle, sb, sbi->s_sbh,
+					    EXT4_JTR_NONE);
 	if (err)
 		goto out;
 
@@ -2955,7 +2965,8 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode)
 	if (prev == &sbi->s_orphan) {
 		jbd_debug(4, "superblock will point to %u\n", ino_next);
 		BUFFER_TRACE(sbi->s_sbh, "get_write_access");
-		err = ext4_journal_get_write_access(handle, sbi->s_sbh);
+		err = ext4_journal_get_write_access(handle, inode->i_sb,
+						    sbi->s_sbh, EXT4_JTR_NONE);
 		if (err) {
 			mutex_unlock(&sbi->s_orphan_lock);
 			goto out_brelse;
@@ -3382,7 +3393,8 @@ static int ext4_rename_dir_prepare(handle_t *handle, struct ext4_renament *ent)
 	if (le32_to_cpu(ent->parent_de->inode) != ent->dir->i_ino)
 		return -EIO;
 	BUFFER_TRACE(ent->dir_bh, "get_write_access");
-	return ext4_journal_get_write_access(handle, ent->dir_bh);
+	return ext4_journal_get_write_access(handle, ent->dir->i_sb,
+					     ent->dir_bh, EXT4_JTR_NONE);
 }
 
 static int ext4_rename_dir_finish(handle_t *handle, struct ext4_renament *ent,
@@ -3418,7 +3430,8 @@ static int ext4_setent(handle_t *handle, struct ext4_renament *ent,
 	int retval;
 
 	BUFFER_TRACE(ent->bh, "get write access");
-	retval = ext4_journal_get_write_access(handle, ent->bh);
+	retval = ext4_journal_get_write_access(handle, ent->dir->i_sb, ent->bh,
+					       EXT4_JTR_NONE);
 	if (retval)
 		return retval;
 	ent->de->inode = cpu_to_le32(ino);
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index cf0c472047e3..18115bdc7da2 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -361,7 +361,8 @@ static struct buffer_head *bclean(handle_t *handle, struct super_block *sb,
 	if (unlikely(!bh))
 		return ERR_PTR(-ENOMEM);
 	BUFFER_TRACE(bh, "get_write_access");
-	if ((err = ext4_journal_get_write_access(handle, bh))) {
+	err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE);
+	if (err) {
 		brelse(bh);
 		bh = ERR_PTR(err);
 	} else {
@@ -440,7 +441,8 @@ static int set_flexbg_block_bitmap(struct super_block *sb, handle_t *handle,
 			return -ENOMEM;
 
 		BUFFER_TRACE(bh, "get_write_access");
-		err = ext4_journal_get_write_access(handle, bh);
+		err = ext4_journal_get_write_access(handle, sb, bh,
+						    EXT4_JTR_NONE);
 		if (err)
 			return err;
 		ext4_debug("mark block bitmap %#04llx (+%llu/%u)\n", block,
@@ -533,7 +535,8 @@ static int setup_new_flex_group_blocks(struct super_block *sb,
 			}
 
 			BUFFER_TRACE(gdb, "get_write_access");
-			err = ext4_journal_get_write_access(handle, gdb);
+			err = ext4_journal_get_write_access(handle, sb, gdb,
+							    EXT4_JTR_NONE);
 			if (err) {
 				brelse(gdb);
 				goto out;
@@ -796,17 +799,18 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
 	}
 
 	BUFFER_TRACE(EXT4_SB(sb)->s_sbh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh);
+	err = ext4_journal_get_write_access(handle, sb, EXT4_SB(sb)->s_sbh,
+					    EXT4_JTR_NONE);
 	if (unlikely(err))
 		goto exit_dind;
 
 	BUFFER_TRACE(gdb_bh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, gdb_bh);
+	err = ext4_journal_get_write_access(handle, sb, gdb_bh, EXT4_JTR_NONE);
 	if (unlikely(err))
 		goto exit_dind;
 
 	BUFFER_TRACE(dind, "get_write_access");
-	err = ext4_journal_get_write_access(handle, dind);
+	err = ext4_journal_get_write_access(handle, sb, dind, EXT4_JTR_NONE);
 	if (unlikely(err))
 		ext4_std_error(sb, err);
 
@@ -911,7 +915,7 @@ static int add_new_gdb_meta_bg(struct super_block *sb,
 	EXT4_SB(sb)->s_gdb_count++;
 	kvfree(o_group_desc);
 	BUFFER_TRACE(gdb_bh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, gdb_bh);
+	err = ext4_journal_get_write_access(handle, sb, gdb_bh, EXT4_JTR_NONE);
 	if (unlikely(err))
 		brelse(gdb_bh);
 	return err;
@@ -987,7 +991,8 @@ static int reserve_backup_gdb(handle_t *handle, struct inode *inode,
 
 	for (i = 0; i < reserved_gdb; i++) {
 		BUFFER_TRACE(primary[i], "get_write_access");
-		if ((err = ext4_journal_get_write_access(handle, primary[i])))
+		if ((err = ext4_journal_get_write_access(handle, sb, primary[i],
+							 EXT4_JTR_NONE)))
 			goto exit_bh;
 	}
 
@@ -1095,7 +1100,8 @@ static void update_backups(struct super_block *sb, int blk_off, char *data,
 			   backup_block, backup_block -
 			   ext4_group_first_block_no(sb, group));
 		BUFFER_TRACE(bh, "get_write_access");
-		if ((err = ext4_journal_get_write_access(handle, bh)))
+		if ((err = ext4_journal_get_write_access(handle, sb, bh,
+							 EXT4_JTR_NONE)))
 			break;
 		lock_buffer(bh);
 		memcpy(bh->b_data, data, size);
@@ -1175,7 +1181,8 @@ static int ext4_add_new_descs(handle_t *handle, struct super_block *sb,
 		if (gdb_off) {
 			gdb_bh = sbi->s_group_desc[gdb_num];
 			BUFFER_TRACE(gdb_bh, "get_write_access");
-			err = ext4_journal_get_write_access(handle, gdb_bh);
+			err = ext4_journal_get_write_access(handle, sb, gdb_bh,
+							    EXT4_JTR_NONE);
 
 			if (!err && reserved_gdb && ext4_bg_num_gdb(sb, group))
 				err = reserve_backup_gdb(handle, resize_inode, group);
@@ -1448,7 +1455,8 @@ static int ext4_flex_group_add(struct super_block *sb,
 	}
 
 	BUFFER_TRACE(sbi->s_sbh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, sbi->s_sbh);
+	err = ext4_journal_get_write_access(handle, sb, sbi->s_sbh,
+					    EXT4_JTR_NONE);
 	if (err)
 		goto exit_journal;
 
@@ -1661,7 +1669,8 @@ static int ext4_group_extend_no_check(struct super_block *sb,
 	}
 
 	BUFFER_TRACE(EXT4_SB(sb)->s_sbh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh);
+	err = ext4_journal_get_write_access(handle, sb, EXT4_SB(sb)->s_sbh,
+					    EXT4_JTR_NONE);
 	if (err) {
 		ext4_warning(sb, "error %d on journal write access", err);
 		goto errout;
@@ -1821,7 +1830,8 @@ static int ext4_convert_meta_bg(struct super_block *sb, struct inode *inode)
 		return PTR_ERR(handle);
 
 	BUFFER_TRACE(sbi->s_sbh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, sbi->s_sbh);
+	err = ext4_journal_get_write_access(handle, sb, sbi->s_sbh,
+					    EXT4_JTR_NONE);
 	if (err)
 		goto errout;
 
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index ca9d4a2fed41..0f577e45de5d 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3407,6 +3407,20 @@ static int ext4_reserve_clusters(struct ext4_sb_info *sbi, ext4_fsblk_t count)
 	return 0;
 }
 
+static void ext4_setup_csum_trigger(struct super_block *sb,
+				    enum ext4_journal_trigger_type type,
+				    void (*trigger)(
+					struct jbd2_buffer_trigger_type *type,
+					struct buffer_head *bh,
+					void *mapped_data,
+					size_t size))
+{
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+
+	sbi->s_journal_triggers[type].sb = sb;
+	sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger;
+}
+
 static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 {
 	char *orig_data = kstrdup(data, GFP_KERNEL);
@@ -5436,7 +5450,7 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type,
 	if (!bh)
 		goto out;
 	BUFFER_TRACE(bh, "get write access");
-	err = ext4_journal_get_write_access(handle, bh);
+	err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE);
 	if (err) {
 		brelse(bh);
 		return err;
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 16e28c08d1e8..2d3cddd215a2 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -529,7 +529,8 @@ static void ext4_xattr_update_super_block(handle_t *handle,
 		return;
 
 	BUFFER_TRACE(EXT4_SB(sb)->s_sbh, "get_write_access");
-	if (ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh) == 0) {
+	if (ext4_journal_get_write_access(handle, sb, EXT4_SB(sb)->s_sbh,
+					  EXT4_JTR_NONE) == 0) {
 		EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_EXT_ATTR);
 		ext4_handle_dirty_super(handle, sb);
 	}
@@ -549,7 +550,8 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode,
 
 	ce = mb_cache_entry_get(ext4_mb_cache, bh->b_bdev, bh->b_blocknr);
 	BUFFER_TRACE(bh, "get_write_access");
-	error = ext4_journal_get_write_access(handle, bh);
+	error = ext4_journal_get_write_access(handle, inode->i_sb, bh,
+					      EXT4_JTR_NONE);
 	if (error)
 		goto out;
 
@@ -791,7 +793,8 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
 		ce = mb_cache_entry_get(ext4_mb_cache, bs->bh->b_bdev,
 					bs->bh->b_blocknr);
 		BUFFER_TRACE(bs->bh, "get_write_access");
-		error = ext4_journal_get_write_access(handle, bs->bh);
+		error = ext4_journal_get_write_access(handle, sb, bs->bh,
+						      EXT4_JTR_NONE);
 		if (error)
 			goto cleanup;
 		lock_buffer(bs->bh);
@@ -877,8 +880,9 @@ inserted:
 				if (error)
 					goto cleanup;
 				BUFFER_TRACE(new_bh, "get_write_access");
-				error = ext4_journal_get_write_access(handle,
-								      new_bh);
+				error = ext4_journal_get_write_access(
+						handle, sb, new_bh,
+						EXT4_JTR_NONE);
 				if (error)
 					goto cleanup_dquot;
 				lock_buffer(new_bh);
@@ -930,7 +934,8 @@ getblk_failed:
 				goto cleanup;
 			}
 			lock_buffer(new_bh);
-			error = ext4_journal_get_create_access(handle, new_bh);
+			error = ext4_journal_get_create_access(handle, sb,
+							new_bh, EXT4_JTR_NONE);
 			if (error) {
 				unlock_buffer(new_bh);
 				error = -EIO;
-- 
2.1.4

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