[PATCH] jbd2: enable building of jbd2 and have ext4 use it rather than jbd

Reworked from a patch by Mingming Cao and Randy Dunlap

Signed-off-By: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

20 files changed, 141 insertions, 108 deletions

diff --git a/fs/Kconfig b/fs/Kconfig
index ac9ba1c30935..db4d13324c36 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -143,24 +143,24 @@ config EXT3_FS_SECURITY
 config EXT4DEV_FS
         tristate "Ext4dev/ext4 extended fs support development (EXPERIMENTAL)"
         depends on EXPERIMENTAL
-        select JBD
-        help
+        select JBD2
+        help
           Ext4dev is a predecessor filesystem of the next generation
           extended fs ext4, based on ext3 filesystem code. It will be
           renamed ext4 fs later, once ext4dev is mature and stabilized.
 
-          Unlike the change from ext2 filesystem to ext3 filesystem,
-          the on-disk format of ext4dev is not the same as ext3 any more:
+          Unlike the change from ext2 filesystem to ext3 filesystem,
+          the on-disk format of ext4dev is not the same as ext3 any more:
           it is based on extent maps and it supports 48-bit physical block
-          numbers. These combined on-disk format changes will allow
+          numbers. These combined on-disk format changes will allow
           ext4dev/ext4 to handle more than 16 TB filesystem volumes --
           a hard limit that ext3 cannot overcome without changing the
-          on-disk format.
+          on-disk format.
 
           Other than extent maps and 48-bit block numbers, ext4dev also is
-          likely to have other new features such as persistent preallocation,
+          likely to have other new features such as persistent preallocation,
           high resolution time stamps, and larger file support etc.  These
-          features will be added to ext4dev gradually.
+          features will be added to ext4dev gradually.
 
           To compile this file system support as a module, choose M here. The
           module will be called ext4dev.  Be aware, however, that the filesystem
@@ -239,6 +239,38 @@ config JBD_DEBUG
           generated.  To turn debugging off again, do
           "echo 0 > /proc/sys/fs/jbd-debug".
 
+config JBD2
+        tristate
+        help
+          This is a generic journaling layer for block devices that support
+          both 32-bit and 64-bit block numbers.  It is currently used by
+          the ext4dev/ext4 filesystem, but it could also be used to add
+          journal support to other file systems or block devices such
+          as RAID or LVM.
+
+          If you are using ext4dev/ext4, you need to say Y here. If you are not
+          using ext4dev/ext4 then you will probably want to say N.
+
+          To compile this device as a module, choose M here. The module will be
+          called jbd2.  If you are compiling ext4dev/ext4 into the kernel,
+          you cannot compile this code as a module.
+
+config JBD2_DEBUG
+        bool "JBD2 (ext4dev/ext4) debugging support"
+        depends on JBD2
+        help
+          If you are using the ext4dev/ext4 journaled file system (or
+          potentially any other filesystem/device using JBD2), this option
+          allows you to enable debugging output while the system is running,
+          in order to help track down any problems you are having.
+          By default, the debugging output will be turned off.
+
+          If you select Y here, then you will be able to turn on debugging
+          with "echo N > /proc/sys/fs/jbd2-debug", where N is a number between
+          1 and 5. The higher the number, the more debugging output is
+          generated.  To turn debugging off again, do
+          "echo 0 > /proc/sys/fs/jbd2-debug".
+
 config FS_MBCACHE
 # Meta block cache for Extended Attributes (ext2/ext3/ext4)
         tristate
diff --git a/fs/Makefile b/fs/Makefile
index 64396af37b2a..9a5ce9323bfd 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -64,6 +64,7 @@ obj-$(CONFIG_REISERFS_FS)	+= reiserfs/
 obj-$(CONFIG_EXT3_FS)           += ext3/ # Before ext2 so root fs can be ext3
 obj-$(CONFIG_EXT4DEV_FS)        += ext4/ # Before ext2 so root fs can be ext4dev
 obj-$(CONFIG_JBD)               += jbd/
+obj-$(CONFIG_JBD2)              += jbd2/
 obj-$(CONFIG_EXT2_FS)           += ext2/
 obj-$(CONFIG_CRAMFS)            += cramfs/
 obj-$(CONFIG_RAMFS)             += ramfs/
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index d143489aeb4c..0a965dd5664e 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -9,7 +9,7 @@
 #include <linux/slab.h>
 #include <linux/capability.h>
 #include <linux/fs.h>
-#include <linux/ext4_jbd.h>
+#include <linux/ext4_jbd2.h>
 #include <linux/ext4_fs.h>
 #include "xattr.h"
 #include "acl.h"
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 357e4e50374a..e9e98449137b 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -14,9 +14,9 @@
 #include <linux/time.h>
 #include <linux/capability.h>
 #include <linux/fs.h>
-#include <linux/jbd.h>
+#include <linux/jbd2.h>
 #include <linux/ext4_fs.h>
-#include <linux/ext4_jbd.h>
+#include <linux/ext4_jbd2.h>
 #include <linux/quotaops.h>
 #include <linux/buffer_head.h>
 
@@ -526,12 +526,12 @@ do_more:
                  * transaction.
                  *
                  * Ideally we would want to allow that to happen, but to
-                 * do so requires making journal_forget() capable of
+                 * do so requires making jbd2_journal_forget() capable of
                  * revoking the queued write of a data block, which
                  * implies blocking on the journal lock.  *forget()
                  * cannot block due to truncate races.
                  *
-                 * Eventually we can fix this by making journal_forget()
+                 * Eventually we can fix this by making jbd2_journal_forget()
                  * return a status indicating whether or not it was able
                  * to revoke the buffer.  On successful revoke, it is
                  * safe not to set the allocation bit in the committed
@@ -1382,7 +1382,7 @@ int ext4_should_retry_alloc(struct super_block *sb, int *retries)
 
         jbd_debug(1, "%s: retrying operation after ENOSPC\n", sb->s_id);
 
-        return journal_force_commit_nested(EXT4_SB(sb)->s_journal);
+        return jbd2_journal_force_commit_nested(EXT4_SB(sb)->s_journal);
 }
 
 /**
diff --git a/fs/ext4/bitmap.c b/fs/ext4/bitmap.c
index f4b35706f39c..11e93c169bcf 100644
--- a/fs/ext4/bitmap.c
+++ b/fs/ext4/bitmap.c
@@ -8,7 +8,7 @@
  */
 
 #include <linux/buffer_head.h>
-#include <linux/jbd.h>
+#include <linux/jbd2.h>
 #include <linux/ext4_fs.h>
 
 #ifdef EXT4FS_DEBUG
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index ec114d7886cc..9833d5d00c46 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -22,7 +22,7 @@
  */
 
 #include <linux/fs.h>
-#include <linux/jbd.h>
+#include <linux/jbd2.h>
 #include <linux/ext4_fs.h>
 #include <linux/buffer_head.h>
 #include <linux/smp_lock.h>
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index d938fbe1e08b..0b622c0624b7 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -20,9 +20,9 @@
 
 #include <linux/time.h>
 #include <linux/fs.h>
-#include <linux/jbd.h>
+#include <linux/jbd2.h>
 #include <linux/ext4_fs.h>
-#include <linux/ext4_jbd.h>
+#include <linux/ext4_jbd2.h>
 #include "xattr.h"
 #include "acl.h"
 
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index 272faa27761d..2a167d7131fa 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -26,9 +26,9 @@
 #include <linux/fs.h>
 #include <linux/sched.h>
 #include <linux/writeback.h>
-#include <linux/jbd.h>
+#include <linux/jbd2.h>
 #include <linux/ext4_fs.h>
-#include <linux/ext4_jbd.h>
+#include <linux/ext4_jbd2.h>
 
 /*
  * akpm: A new design for ext4_sync_file().
diff --git a/fs/ext4/hash.c b/fs/ext4/hash.c
index d15bb4274428..a67966385e06 100644
--- a/fs/ext4/hash.c
+++ b/fs/ext4/hash.c
@@ -10,7 +10,7 @@
  */
 
 #include <linux/fs.h>
-#include <linux/jbd.h>
+#include <linux/jbd2.h>
 #include <linux/sched.h>
 #include <linux/ext4_fs.h>
 #include <linux/cryptohash.h>
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 4b92066ca08f..34d39ae966f7 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -14,9 +14,9 @@
 
 #include <linux/time.h>
 #include <linux/fs.h>
-#include <linux/jbd.h>
+#include <linux/jbd2.h>
 #include <linux/ext4_fs.h>
-#include <linux/ext4_jbd.h>
+#include <linux/ext4_jbd2.h>
 #include <linux/stat.h>
 #include <linux/string.h>
 #include <linux/quotaops.h>
@@ -497,7 +497,7 @@ repeat_in_this_group:
                                 goto got;
                         }
                         /* we lost it */
-                        journal_release_buffer(handle, bitmap_bh);
+                        jbd2_journal_release_buffer(handle, bitmap_bh);
 
                         if (++ino < EXT4_INODES_PER_GROUP(sb))
                                 goto repeat_in_this_group;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 7275d60dcc59..0d96c7d3bb5b 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -25,8 +25,8 @@
 #include <linux/module.h>
 #include <linux/fs.h>
 #include <linux/time.h>
-#include <linux/ext4_jbd.h>
-#include <linux/jbd.h>
+#include <linux/ext4_jbd2.h>
+#include <linux/jbd2.h>
 #include <linux/smp_lock.h>
 #include <linux/highuid.h>
 #include <linux/pagemap.h>
@@ -84,7 +84,7 @@ int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode,
         if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ||
             (!is_metadata && !ext4_should_journal_data(inode))) {
                 if (bh) {
-                        BUFFER_TRACE(bh, "call journal_forget");
+                        BUFFER_TRACE(bh, "call jbd2_journal_forget");
                         return ext4_journal_forget(handle, bh);
                 }
                 return 0;
@@ -657,7 +657,7 @@ static int ext4_alloc_branch(handle_t *handle, struct inode *inode,
 failed:
         /* Allocation failed, free what we already allocated */
         for (i = 1; i <= n ; i++) {
-                BUFFER_TRACE(branch[i].bh, "call journal_forget");
+                BUFFER_TRACE(branch[i].bh, "call jbd2_journal_forget");
                 ext4_journal_forget(handle, branch[i].bh);
         }
         for (i = 0; i <indirect_blks; i++)
@@ -758,7 +758,7 @@ static int ext4_splice_branch(handle_t *handle, struct inode *inode,
 
 err_out:
         for (i = 1; i <= num; i++) {
-                BUFFER_TRACE(where[i].bh, "call journal_forget");
+                BUFFER_TRACE(where[i].bh, "call jbd2_journal_forget");
                 ext4_journal_forget(handle, where[i].bh);
                 ext4_free_blocks(handle,inode,le32_to_cpu(where[i-1].key),1);
         }
@@ -1119,7 +1119,7 @@ static int walk_page_buffers(	handle_t *handle,
  * To preserve ordering, it is essential that the hole instantiation and
  * the data write be encapsulated in a single transaction.  We cannot
  * close off a transaction and start a new one between the ext4_get_block()
- * and the commit_write().  So doing the journal_start at the start of
+ * and the commit_write().  So doing the jbd2_journal_start at the start of
  * prepare_write() is the right place.
  *
  * Also, this function can nest inside ext4_writepage() ->
@@ -1135,7 +1135,7 @@ static int walk_page_buffers(	handle_t *handle,
  * transaction open and was blocking on the quota lock - a ranking
  * violation.
  *
- * So what we do is to rely on the fact that journal_stop/journal_start
+ * So what we do is to rely on the fact that jbd2_journal_stop/journal_start
  * will _not_ run commit under these circumstances because handle->h_ref
  * is elevated.  We'll still have enough credits for the tiny quotafile
  * write.
@@ -1184,7 +1184,7 @@ out:
 
 int ext4_journal_dirty_data(handle_t *handle, struct buffer_head *bh)
 {
-        int err = journal_dirty_data(handle, bh);
+        int err = jbd2_journal_dirty_data(handle, bh);
         if (err)
                 ext4_journal_abort_handle(__FUNCTION__, __FUNCTION__,
                                                 bh, handle,err);
@@ -1333,9 +1333,9 @@ static sector_t ext4_bmap(struct address_space *mapping, sector_t block)
 
                 EXT4_I(inode)->i_state &= ~EXT4_STATE_JDATA;
                 journal = EXT4_JOURNAL(inode);
-                journal_lock_updates(journal);
-                err = journal_flush(journal);
-                journal_unlock_updates(journal);
+                jbd2_journal_lock_updates(journal);
+                err = jbd2_journal_flush(journal);
+                jbd2_journal_unlock_updates(journal);
 
                 if (err)
                         return 0;
@@ -1356,7 +1356,7 @@ static int bput_one(handle_t *handle, struct buffer_head *bh)
         return 0;
 }
 
-static int journal_dirty_data_fn(handle_t *handle, struct buffer_head *bh)
+static int jbd2_journal_dirty_data_fn(handle_t *handle, struct buffer_head *bh)
 {
         if (buffer_mapped(bh))
                 return ext4_journal_dirty_data(handle, bh);
@@ -1464,7 +1464,7 @@ static int ext4_ordered_writepage(struct page *page,
          */
         if (ret == 0) {
                 err = walk_page_buffers(handle, page_bufs, 0, PAGE_CACHE_SIZE,
-                                        NULL, journal_dirty_data_fn);
+                                        NULL, jbd2_journal_dirty_data_fn);
                 if (!ret)
                         ret = err;
         }
@@ -1595,7 +1595,7 @@ static void ext4_invalidatepage(struct page *page, unsigned long offset)
         if (offset == 0)
                 ClearPageChecked(page);
 
-        journal_invalidatepage(journal, page, offset);
+        jbd2_journal_invalidatepage(journal, page, offset);
 }
 
 static int ext4_releasepage(struct page *page, gfp_t wait)
@@ -1605,7 +1605,7 @@ static int ext4_releasepage(struct page *page, gfp_t wait)
         WARN_ON(PageChecked(page));
         if (!page_has_buffers(page))
                 return 0;
-        return journal_try_to_free_buffers(journal, page, wait);
+        return jbd2_journal_try_to_free_buffers(journal, page, wait);
 }
 
 /*
@@ -1982,11 +1982,11 @@ static void ext4_clear_blocks(handle_t *handle, struct inode *inode,
 
         /*
          * Any buffers which are on the journal will be in memory. We find
-         * them on the hash table so journal_revoke() will run journal_forget()
+         * them on the hash table so jbd2_journal_revoke() will run jbd2_journal_forget()
          * on them.  We've already detached each block from the file, so
-         * bforget() in journal_forget() should be safe.
+         * bforget() in jbd2_journal_forget() should be safe.
          *
-         * AKPM: turn on bforget in journal_forget()!!!
+         * AKPM: turn on bforget in jbd2_journal_forget()!!!
          */
         for (p = first; p < last; p++) {
                 u32 nr = le32_to_cpu(*p);
@@ -2132,11 +2132,11 @@ static void ext4_free_branches(handle_t *handle, struct inode *inode,
                          * We've probably journalled the indirect block several
                          * times during the truncate.  But it's no longer
                          * needed and we now drop it from the transaction via
-                         * journal_revoke().
+                         * jbd2_journal_revoke().
                          *
                          * That's easy if it's exclusively part of this
                          * transaction.  But if it's part of the committing
-                         * transaction then journal_forget() will simply
+                         * transaction then jbd2_journal_forget() will simply
                          * brelse() it.  That means that if the underlying
                          * block is reallocated in ext4_get_block(),
                          * unmap_underlying_metadata() will find this block
@@ -2251,7 +2251,7 @@ void ext4_truncate(struct inode *inode)
 
         /*
          * We have to lock the EOF page here, because lock_page() nests
-         * outside journal_start().
+         * outside jbd2_journal_start().
          */
         if ((inode->i_size & (blocksize - 1)) == 0) {
                 /* Block boundary? Nothing to do */
@@ -3035,7 +3035,7 @@ int ext4_mark_iloc_dirty(handle_t *handle,
         /* the do_update_inode consumes one bh->b_count */
         get_bh(iloc->bh);
 
-        /* ext4_do_update_inode() does journal_dirty_metadata */
+        /* ext4_do_update_inode() does jbd2_journal_dirty_metadata */
         err = ext4_do_update_inode(handle, inode, iloc);
         put_bh(iloc->bh);
         return err;
@@ -3153,7 +3153,7 @@ 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 = journal_get_write_access(handle, iloc.bh);
+                        err = jbd2_journal_get_write_access(handle, iloc.bh);
                         if (!err)
                                 err = ext4_journal_dirty_metadata(handle,
                                                                   iloc.bh);
@@ -3185,8 +3185,8 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
         if (is_journal_aborted(journal) || IS_RDONLY(inode))
                 return -EROFS;
 
-        journal_lock_updates(journal);
-        journal_flush(journal);
+        jbd2_journal_lock_updates(journal);
+        jbd2_journal_flush(journal);
 
         /*
          * OK, there are no updates running now, and all cached data is
@@ -3202,7 +3202,7 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
                 EXT4_I(inode)->i_flags &= ~EXT4_JOURNAL_DATA_FL;
         ext4_set_aops(inode);
 
-        journal_unlock_updates(journal);
+        jbd2_journal_unlock_updates(journal);
 
         /* Finally we can mark the inode as dirty. */
 
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index a567af161b06..a63dce2117b8 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -8,10 +8,10 @@
  */
 
 #include <linux/fs.h>
-#include <linux/jbd.h>
+#include <linux/jbd2.h>
 #include <linux/capability.h>
 #include <linux/ext4_fs.h>
-#include <linux/ext4_jbd.h>
+#include <linux/ext4_jbd2.h>
 #include <linux/time.h>
 #include <linux/compat.h>
 #include <linux/smp_lock.h>
@@ -219,9 +219,9 @@ flags_err:
                         return -EFAULT;
 
                 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
-                journal_lock_updates(EXT4_SB(sb)->s_journal);
-                journal_flush(EXT4_SB(sb)->s_journal);
-                journal_unlock_updates(EXT4_SB(sb)->s_journal);
+                jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
+                jbd2_journal_flush(EXT4_SB(sb)->s_journal);
+                jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
 
                 return err;
         }
@@ -241,9 +241,9 @@ flags_err:
                         return -EFAULT;
 
                 err = ext4_group_add(sb, &input);
-                journal_lock_updates(EXT4_SB(sb)->s_journal);
-                journal_flush(EXT4_SB(sb)->s_journal);
-                journal_unlock_updates(EXT4_SB(sb)->s_journal);
+                jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
+                jbd2_journal_flush(EXT4_SB(sb)->s_journal);
+                jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
 
                 return err;
         }
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 956b38113f62..f98b9994e36c 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -26,10 +26,10 @@
 
 #include <linux/fs.h>
 #include <linux/pagemap.h>
-#include <linux/jbd.h>
+#include <linux/jbd2.h>
 #include <linux/time.h>
 #include <linux/ext4_fs.h>
-#include <linux/ext4_jbd.h>
+#include <linux/ext4_jbd2.h>
 #include <linux/fcntl.h>
 #include <linux/stat.h>
 #include <linux/string.h>
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 4a47895d9d6d..5b2828d21180 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -13,7 +13,7 @@
 
 #include <linux/sched.h>
 #include <linux/smp_lock.h>
-#include <linux/ext4_jbd.h>
+#include <linux/ext4_jbd2.h>
 
 #include <linux/errno.h>
 #include <linux/slab.h>
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 9e32a2a8d286..f131bb69b62e 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -20,9 +20,9 @@
 #include <linux/string.h>
 #include <linux/fs.h>
 #include <linux/time.h>
-#include <linux/jbd.h>
+#include <linux/jbd2.h>
 #include <linux/ext4_fs.h>
-#include <linux/ext4_jbd.h>
+#include <linux/ext4_jbd2.h>
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/blkdev.h>
@@ -63,7 +63,7 @@ static void ext4_write_super (struct super_block * sb);
 static void ext4_write_super_lockfs(struct super_block *sb);
 
 /*
- * Wrappers for journal_start/end.
+ * Wrappers for jbd2_journal_start/end.
  *
  * The only special thing we need to do here is to make sure that all
  * journal_end calls result in the superblock being marked dirty, so
@@ -87,12 +87,12 @@ handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks)
                 return ERR_PTR(-EROFS);
         }
 
-        return journal_start(journal, nblocks);
+        return jbd2_journal_start(journal, nblocks);
 }
 
 /*
  * The only special thing we need to do here is to make sure that all
- * journal_stop calls result in the superblock being marked dirty, so
+ * jbd2_journal_stop calls result in the superblock being marked dirty, so
  * that sync() will call the filesystem's write_super callback if
  * appropriate.
  */
@@ -104,7 +104,7 @@ int __ext4_journal_stop(const char *where, handle_t *handle)
 
         sb = handle->h_transaction->t_journal->j_private;
         err = handle->h_err;
-        rc = journal_stop(handle);
+        rc = jbd2_journal_stop(handle);
 
         if (!err)
                 err = rc;
@@ -131,7 +131,7 @@ void ext4_journal_abort_handle(const char *caller, const char *err_fn,
         printk(KERN_ERR "%s: aborting transaction: %s in %s\n",
                caller, errstr, err_fn);
 
-        journal_abort_handle(handle);
+        jbd2_journal_abort_handle(handle);
 }
 
 /* Deal with the reporting of failure conditions on a filesystem such as
@@ -144,7 +144,7 @@ void ext4_journal_abort_handle(const char *caller, const char *err_fn,
  * be aborted, we can't rely on the current, or future, transactions to
  * write out the superblock safely.
  *
- * We'll just use the journal_abort() error code to record an error in
+ * We'll just use the jbd2_journal_abort() error code to record an error in
  * the journal instead.  On recovery, the journal will compain about
  * that error until we've noted it down and cleared it.
  */
@@ -164,7 +164,7 @@ static void ext4_handle_error(struct super_block *sb)
 
                 EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT;
                 if (journal)
-                        journal_abort(journal, -EIO);
+                        jbd2_journal_abort(journal, -EIO);
         }
         if (test_opt (sb, ERRORS_RO)) {
                 printk (KERN_CRIT "Remounting filesystem read-only\n");
@@ -203,7 +203,7 @@ static const char *ext4_decode_error(struct super_block * sb, int errno,
                 errstr = "Out of memory";
                 break;
         case -EROFS:
-                if (!sb || EXT4_SB(sb)->s_journal->j_flags & JFS_ABORT)
+                if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)
                         errstr = "Journal has aborted";
                 else
                         errstr = "Readonly filesystem";
@@ -279,7 +279,7 @@ void ext4_abort (struct super_block * sb, const char * function,
         EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
         sb->s_flags |= MS_RDONLY;
         EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT;
-        journal_abort(EXT4_SB(sb)->s_journal, -EIO);
+        jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO);
 }
 
 void ext4_warning (struct super_block * sb, const char * function,
@@ -391,7 +391,7 @@ static void ext4_put_super (struct super_block * sb)
         int i;
 
         ext4_xattr_put_super(sb);
-        journal_destroy(sbi->s_journal);
+        jbd2_journal_destroy(sbi->s_journal);
         if (!(sb->s_flags & MS_RDONLY)) {
                 EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
                 es->s_state = cpu_to_le16(sbi->s_mount_state);
@@ -1722,8 +1722,8 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
                 /* No mode set, assume a default based on the journal
                    capabilities: ORDERED_DATA if the journal can
                    cope, else JOURNAL_DATA */
-                if (journal_check_available_features
-                    (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE))
+                if (jbd2_journal_check_available_features
+                    (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE))
                         set_opt(sbi->s_mount_opt, ORDERED_DATA);
                 else
                         set_opt(sbi->s_mount_opt, JOURNAL_DATA);
@@ -1731,8 +1731,8 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
 
         case EXT4_MOUNT_ORDERED_DATA:
         case EXT4_MOUNT_WRITEBACK_DATA:
-                if (!journal_check_available_features
-                    (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) {
+                if (!jbd2_journal_check_available_features
+                    (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) {
                         printk(KERN_ERR "EXT4-fs: Journal does not support "
                                "requested data journaling mode\n");
                         goto failed_mount4;
@@ -1749,7 +1749,7 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
                 }
         }
         /*
-         * The journal_load will have done any necessary log recovery,
+         * The jbd2_journal_load will have done any necessary log recovery,
          * so we can safely mount the rest of the filesystem now.
          */
 
@@ -1797,7 +1797,7 @@ cantfind_ext4:
         goto failed_mount;
 
 failed_mount4:
-        journal_destroy(sbi->s_journal);
+        jbd2_journal_destroy(sbi->s_journal);
 failed_mount3:
         percpu_counter_destroy(&sbi->s_freeblocks_counter);
         percpu_counter_destroy(&sbi->s_freeinodes_counter);
@@ -1837,9 +1837,9 @@ static void ext4_init_journal_params(struct super_block *sb, journal_t *journal)
 
         spin_lock(&journal->j_state_lock);
         if (test_opt(sb, BARRIER))
-                journal->j_flags |= JFS_BARRIER;
+                journal->j_flags |= JBD2_BARRIER;
         else
-                journal->j_flags &= ~JFS_BARRIER;
+                journal->j_flags &= ~JBD2_BARRIER;
         spin_unlock(&journal->j_state_lock);
 }
 
@@ -1873,7 +1873,7 @@ static journal_t *ext4_get_journal(struct super_block *sb,
                 return NULL;
         }
 
-        journal = journal_init_inode(journal_inode);
+        journal = jbd2_journal_init_inode(journal_inode);
         if (!journal) {
                 printk(KERN_ERR "EXT4-fs: Could not load journal inode\n");
                 iput(journal_inode);
@@ -1945,7 +1945,7 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb,
         start = sb_block + 1;
         brelse(bh);     /* we're done with the superblock */
 
-        journal = journal_init_dev(bdev, sb->s_bdev,
+        journal = jbd2_journal_init_dev(bdev, sb->s_bdev,
                                         start, len, blocksize);
         if (!journal) {
                 printk(KERN_ERR "EXT4-fs: failed to create device journal\n");
@@ -1968,7 +1968,7 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb,
         ext4_init_journal_params(sb, journal);
         return journal;
 out_journal:
-        journal_destroy(journal);
+        jbd2_journal_destroy(journal);
 out_bdev:
         ext4_blkdev_put(bdev);
         return NULL;
@@ -2029,22 +2029,22 @@ static int ext4_load_journal(struct super_block *sb,
         }
 
         if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) {
-                err = journal_update_format(journal);
+                err = jbd2_journal_update_format(journal);
                 if (err)  {
                         printk(KERN_ERR "EXT4-fs: error updating journal.\n");
-                        journal_destroy(journal);
+                        jbd2_journal_destroy(journal);
                         return err;
                 }
         }
 
         if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER))
-                err = journal_wipe(journal, !really_read_only);
+                err = jbd2_journal_wipe(journal, !really_read_only);
         if (!err)
-                err = journal_load(journal);
+                err = jbd2_journal_load(journal);
 
         if (err) {
                 printk(KERN_ERR "EXT4-fs: error loading journal.\n");
-                journal_destroy(journal);
+                jbd2_journal_destroy(journal);
                 return err;
         }
 
@@ -2081,9 +2081,9 @@ static int ext4_create_journal(struct super_block * sb,
         printk(KERN_INFO "EXT4-fs: creating new journal on inode %u\n",
                journal_inum);
 
-        if (journal_create(journal)) {
+        if (jbd2_journal_create(journal)) {
                 printk(KERN_ERR "EXT4-fs: error creating journal.\n");
-                journal_destroy(journal);
+                jbd2_journal_destroy(journal);
                 return -EIO;
         }
 
@@ -2130,15 +2130,15 @@ static void ext4_mark_recovery_complete(struct super_block * sb,
 {
         journal_t *journal = EXT4_SB(sb)->s_journal;
 
-        journal_lock_updates(journal);
-        journal_flush(journal);
+        jbd2_journal_lock_updates(journal);
+        jbd2_journal_flush(journal);
         if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) &&
             sb->s_flags & MS_RDONLY) {
                 EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
                 sb->s_dirt = 0;
                 ext4_commit_super(sb, es, 1);
         }
-        journal_unlock_updates(journal);
+        jbd2_journal_unlock_updates(journal);
 }
 
 /*
@@ -2160,7 +2160,7 @@ static void ext4_clear_journal_err(struct super_block * sb,
          * journal by a prior ext4_error() or ext4_abort()
          */
 
-        j_errno = journal_errno(journal);
+        j_errno = jbd2_journal_errno(journal);
         if (j_errno) {
                 char nbuf[16];
 
@@ -2174,7 +2174,7 @@ static void ext4_clear_journal_err(struct super_block * sb,
                 es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
                 ext4_commit_super (sb, es, 1);
 
-                journal_clear_err(journal);
+                jbd2_journal_clear_err(journal);
         }
 }
 
@@ -2217,9 +2217,9 @@ static int ext4_sync_fs(struct super_block *sb, int wait)
         tid_t target;
 
         sb->s_dirt = 0;
-        if (journal_start_commit(EXT4_SB(sb)->s_journal, &target)) {
+        if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) {
                 if (wait)
-                        log_wait_commit(EXT4_SB(sb)->s_journal, target);
+                        jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target);
         }
         return 0;
 }
@@ -2236,8 +2236,8 @@ static void ext4_write_super_lockfs(struct super_block *sb)
                 journal_t *journal = EXT4_SB(sb)->s_journal;
 
                 /* Now we set up the journal barrier. */
-                journal_lock_updates(journal);
-                journal_flush(journal);
+                jbd2_journal_lock_updates(journal);
+                jbd2_journal_flush(journal);
 
                 /* Journal blocked and flushed, clear needs_recovery flag. */
                 EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
@@ -2257,7 +2257,7 @@ static void ext4_unlockfs(struct super_block *sb)
                 EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
                 ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1);
                 unlock_super(sb);
-                journal_unlock_updates(EXT4_SB(sb)->s_journal);
+                jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
         }
 }
 
@@ -2438,9 +2438,9 @@ static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf)
  * is locked for write. Otherwise the are possible deadlocks:
  * Process 1                         Process 2
  * ext4_create()                     quota_sync()
- *   journal_start()                   write_dquot()
+ *   jbd2_journal_start()                   write_dquot()
  *   DQUOT_INIT()                        down(dqio_mutex)
- *     down(dqio_mutex)                    journal_start()
+ *     down(dqio_mutex)                    jbd2_journal_start()
  *
  */
 
diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c
index 9e4c75f912f7..fcf527286d75 100644
--- a/fs/ext4/symlink.c
+++ b/fs/ext4/symlink.c
@@ -18,7 +18,7 @@
  */
 
 #include <linux/fs.h>
-#include <linux/jbd.h>
+#include <linux/jbd2.h>
 #include <linux/ext4_fs.h>
 #include <linux/namei.h>
 #include "xattr.h"
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index d3a408154101..90f7d5c0bae4 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -53,7 +53,7 @@
 #include <linux/init.h>
 #include <linux/fs.h>
 #include <linux/slab.h>
-#include <linux/ext4_jbd.h>
+#include <linux/ext4_jbd2.h>
 #include <linux/ext4_fs.h>
 #include <linux/mbcache.h>
 #include <linux/quotaops.h>
diff --git a/fs/ext4/xattr_security.c b/fs/ext4/xattr_security.c
index d84b1dabeb16..b6a6861951f9 100644
--- a/fs/ext4/xattr_security.c
+++ b/fs/ext4/xattr_security.c
@@ -7,7 +7,7 @@
 #include <linux/string.h>
 #include <linux/fs.h>
 #include <linux/smp_lock.h>
-#include <linux/ext4_jbd.h>
+#include <linux/ext4_jbd2.h>
 #include <linux/ext4_fs.h>
 #include <linux/security.h>
 #include "xattr.h"
diff --git a/fs/ext4/xattr_trusted.c b/fs/ext4/xattr_trusted.c
index 11bd58c95a61..b76f2dbc82da 100644
--- a/fs/ext4/xattr_trusted.c
+++ b/fs/ext4/xattr_trusted.c
@@ -10,7 +10,7 @@
 #include <linux/capability.h>
 #include <linux/fs.h>
 #include <linux/smp_lock.h>
-#include <linux/ext4_jbd.h>
+#include <linux/ext4_jbd2.h>
 #include <linux/ext4_fs.h>
 #include "xattr.h"
 
diff --git a/fs/ext4/xattr_user.c b/fs/ext4/xattr_user.c
index 9c5a665e0837..c53cded0761a 100644
--- a/fs/ext4/xattr_user.c
+++ b/fs/ext4/xattr_user.c
@@ -9,7 +9,7 @@
 #include <linux/string.h>
 #include <linux/fs.h>
 #include <linux/smp_lock.h>
-#include <linux/ext4_jbd.h>
+#include <linux/ext4_jbd2.h>
 #include <linux/ext4_fs.h>
 #include "xattr.h"