From: Zhang Yi <yi.zhang@xxxxxxxxxx>
Add a parameter in struct ext4_es_tree to count per-inode's total
delalloc data blocks number, it will be used to calculate reserved
meta blocks when creating a new delalloc extent entry, or mapping a
delalloc entry to a real one or releasing a delalloc entry.
Signed-off-by: Zhang Yi <yi.zhang@xxxxxxxxxx>
---
fs/ext4/extents_status.c | 19 +++++++++++++++++++
fs/ext4/extents_status.h | 1 +
2 files changed, 20 insertions(+)
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
index 34164c2827f2..b098c3316189 100644
--- a/fs/ext4/extents_status.c
+++ b/fs/ext4/extents_status.c
@@ -178,6 +178,7 @@ void ext4_es_init_tree(struct ext4_es_tree *tree)
{
tree->root = RB_ROOT;
tree->cache_es = NULL;
+ tree->da_es_len = 0;
}
#ifdef ES_DEBUG__
@@ -787,6 +788,20 @@ static inline void ext4_es_insert_extent_check(struct inode *inode,
}
#endif
+/*
+ * Update total delay allocated extent length.
+ */
+static inline void ext4_es_update_da_block(struct inode *inode, long es_len)
+{
+ struct ext4_es_tree *tree = &EXT4_I(inode)->i_es_tree;
+
+ if (!es_len)
+ return;
+
+ tree->da_es_len += es_len;
+ es_debug("update da blocks %ld, to %u\n", es_len, tree->da_es_len);
+}
+
static int __es_insert_extent(struct inode *inode, struct extent_status *newes,
struct extent_status *prealloc)
{
@@ -915,6 +930,7 @@ void ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk,
__es_free_extent(es1);
es1 = NULL;
}
+ ext4_es_update_da_block(inode, -rinfo.ndelonly_blk);
err2 = __es_insert_extent(inode, &newes, es2);
if (err2 == -ENOMEM && !ext4_es_must_keep(&newes))
@@ -1571,6 +1587,7 @@ void ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk,
__es_free_extent(es);
es = NULL;
}
+ ext4_es_update_da_block(inode, -rinfo.ndelonly_blk);
write_unlock(&EXT4_I(inode)->i_es_lock);
if (err)
goto retry;
@@ -2161,6 +2178,8 @@ void ext4_es_insert_delayed_block(struct inode *inode, ext4_lblk_t lblk,
pr = NULL;
}
}
+
+ ext4_es_update_da_block(inode, newes.es_len);
error:
write_unlock(&EXT4_I(inode)->i_es_lock);
if (err1 || err2 || err3 < 0)
diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h
index 7344667eb2cd..ee873b305210 100644
--- a/fs/ext4/extents_status.h
+++ b/fs/ext4/extents_status.h
@@ -66,6 +66,7 @@ struct extent_status {
struct ext4_es_tree {
struct rb_root root;
struct extent_status *cache_es; /* recently accessed extent */
+ ext4_lblk_t da_es_len; /* total delalloc len */
};
struct ext4_es_stats {
--
2.39.2
