ext4: let ext4 maintain extent status tree

This patch lets ext4 maintain extent status tree.

Currently it only tracks delay extent status in extent status tree.  When a
delay allocation is issued, the related delay extent will be inserted into
extent status tree.  When a delay extent is written out or invalidated, it will
be removed from this tree.

Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
Signed-off-by: Allison Henderson <achender@linux.vnet.ibm.com>
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 11 insertions, 1 deletions

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 6791d091fbc7..ad6cd8aeb946 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -50,6 +50,7 @@
 #include "xattr.h"
 #include "acl.h"
 #include "mballoc.h"
+#include "ext4_extents.h"
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/ext4.h>
@@ -1033,6 +1034,7 @@ void ext4_clear_inode(struct inode *inode)
         clear_inode(inode);
         dquot_drop(inode);
         ext4_discard_preallocations(inode);
+        ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS);
         if (EXT4_I(inode)->jinode) {
                 jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode),
                                                EXT4_I(inode)->jinode);
@@ -5296,9 +5298,14 @@ static int __init ext4_init_fs(void)
                 init_waitqueue_head(&ext4__ioend_wq[i]);
         }
 
-        err = ext4_init_pageio();
+        err = ext4_init_es();
         if (err)
                 return err;
+
+        err = ext4_init_pageio();
+        if (err)
+                goto out7;
+
         err = ext4_init_system_zone();
         if (err)
                 goto out6;
@@ -5348,6 +5355,9 @@ out5:
         ext4_exit_system_zone();
 out6:
         ext4_exit_pageio();
+out7:
+        ext4_exit_es();
+
         return err;
 }