5 files changed, 23 insertions, 14 deletions

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 107936db244e..bc0f1910b9cf 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3642,7 +3642,7 @@ int ext4_find_delalloc_range(struct inode *inode,
 {
         struct extent_status es;
 
-        ext4_es_find_delayed_extent(inode, lblk_start, &es);
+        ext4_es_find_delayed_extent_range(inode, lblk_start, lblk_end, &es);
         if (es.es_len == 0)
                 return 0; /* there is no delay extent in this tree */
         else if (es.es_lblk <= lblk_start &&
@@ -4608,9 +4608,10 @@ static int ext4_find_delayed_extent(struct inode *inode,
         struct extent_status es;
         ext4_lblk_t block, next_del;
 
-        ext4_es_find_delayed_extent(inode, newes->es_lblk, &es);
-
         if (newes->es_pblk == 0) {
+                ext4_es_find_delayed_extent_range(inode, newes->es_lblk,
+                                newes->es_lblk + newes->es_len - 1, &es);
+
                 /*
                  * No extent in extent-tree contains block @newes->es_pblk,
                  * then the block may stay in 1)a hole or 2)delayed-extent.
@@ -4630,7 +4631,7 @@ static int ext4_find_delayed_extent(struct inode *inode,
         }
 
         block = newes->es_lblk + newes->es_len;
-        ext4_es_find_delayed_extent(inode, block, &es);
+        ext4_es_find_delayed_extent_range(inode, block, EXT_MAX_BLOCKS, &es);
         if (es.es_len == 0)
                 next_del = EXT_MAX_BLOCKS;
         else
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
index fe3337a85ede..e6941e622d31 100644
--- a/fs/ext4/extents_status.c
+++ b/fs/ext4/extents_status.c
@@ -232,14 +232,16 @@ static struct extent_status *__es_tree_search(struct rb_root *root,
 }
 
 /*
- * ext4_es_find_delayed_extent: find the 1st delayed extent covering @es->lblk
- * if it exists, otherwise, the next extent after @es->lblk.
+ * ext4_es_find_delayed_extent_range: find the 1st delayed extent covering
+ * @es->lblk if it exists, otherwise, the next extent after @es->lblk.
  *
  * @inode: the inode which owns delayed extents
  * @lblk: the offset where we start to search
+ * @end: the offset where we stop to search
  * @es: delayed extent that we found
  */
-void ext4_es_find_delayed_extent(struct inode *inode, ext4_lblk_t lblk,
+void ext4_es_find_delayed_extent_range(struct inode *inode,
+                                 ext4_lblk_t lblk, ext4_lblk_t end,
                                  struct extent_status *es)
 {
         struct ext4_es_tree *tree = NULL;
@@ -247,7 +249,8 @@ void ext4_es_find_delayed_extent(struct inode *inode, ext4_lblk_t lblk,
         struct rb_node *node;
 
         BUG_ON(es == NULL);
-        trace_ext4_es_find_delayed_extent_enter(inode, lblk);
+        BUG_ON(end < lblk);
+        trace_ext4_es_find_delayed_extent_range_enter(inode, lblk);
 
         read_lock(&EXT4_I(inode)->i_es_lock);
         tree = &EXT4_I(inode)->i_es_tree;
@@ -270,6 +273,10 @@ out:
         if (es1 && !ext4_es_is_delayed(es1)) {
                 while ((node = rb_next(&es1->rb_node)) != NULL) {
                         es1 = rb_entry(node, struct extent_status, rb_node);
+                        if (es1->es_lblk > end) {
+                                es1 = NULL;
+                                break;
+                        }
                         if (ext4_es_is_delayed(es1))
                                 break;
                 }
@@ -285,7 +292,7 @@ out:
         read_unlock(&EXT4_I(inode)->i_es_lock);
 
         ext4_es_lru_add(inode);
-        trace_ext4_es_find_delayed_extent_exit(inode, es);
+        trace_ext4_es_find_delayed_extent_range_exit(inode, es);
 }
 
 static struct extent_status *
diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h
index d8e2d4dc311e..f740eb03b707 100644
--- a/fs/ext4/extents_status.h
+++ b/fs/ext4/extents_status.h
@@ -62,7 +62,8 @@ extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk,
                                  unsigned long long status);
 extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk,
                                  ext4_lblk_t len);
-extern void ext4_es_find_delayed_extent(struct inode *inode, ext4_lblk_t lblk,
+extern void ext4_es_find_delayed_extent_range(struct inode *inode,
+                                        ext4_lblk_t lblk, ext4_lblk_t end,
                                         struct extent_status *es);
 extern int ext4_es_lookup_extent(struct inode *inode, ext4_lblk_t lblk,
                                  struct extent_status *es);
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 64848b595b24..1bc4523541d6 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -464,7 +464,7 @@ static loff_t ext4_seek_data(struct file *file, loff_t offset, loff_t maxsize)
                  * If there is a delay extent at this offset,
                  * it will be as a data.
                  */
-                ext4_es_find_delayed_extent(inode, last, &es);
+                ext4_es_find_delayed_extent_range(inode, last, last, &es);
                 if (es.es_len != 0 && in_range(last, es.es_lblk, es.es_len)) {
                         if (last != start)
                                 dataoff = last << blkbits;
@@ -547,7 +547,7 @@ static loff_t ext4_seek_hole(struct file *file, loff_t offset, loff_t maxsize)
                  * If there is a delay extent at this offset,
                  * we will skip this extent.
                  */
-                ext4_es_find_delayed_extent(inode, last, &es);
+                ext4_es_find_delayed_extent_range(inode, last, last, &es);
                 if (es.es_len != 0 && in_range(last, es.es_lblk, es.es_len)) {
                         last = es.es_lblk + es.es_len;
                         holeoff = last << blkbits;
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index d0e686402df8..8ee15b97cd38 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -2139,7 +2139,7 @@ TRACE_EVENT(ext4_es_remove_extent,
                   __entry->lblk, __entry->len)
 );
 
-TRACE_EVENT(ext4_es_find_delayed_extent_enter,
+TRACE_EVENT(ext4_es_find_delayed_extent_range_enter,
         TP_PROTO(struct inode *inode, ext4_lblk_t lblk),
 
         TP_ARGS(inode, lblk),
@@ -2161,7 +2161,7 @@ TRACE_EVENT(ext4_es_find_delayed_extent_enter,
                   (unsigned long) __entry->ino, __entry->lblk)
 );
 
-TRACE_EVENT(ext4_es_find_delayed_extent_exit,
+TRACE_EVENT(ext4_es_find_delayed_extent_range_exit,
         TP_PROTO(struct inode *inode, struct extent_status *es),
 
         TP_ARGS(inode, es),