ext4: Add a tracepoint for ext4_alloc_da_blocks()
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index a5b4ce4..9887a0c 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3128,6 +3128,8 @@
*/
int ext4_alloc_da_blocks(struct inode *inode)
{
+ trace_ext4_alloc_da_blocks(inode);
+
if (!EXT4_I(inode)->i_reserved_data_blocks &&
!EXT4_I(inode)->i_reserved_meta_blocks)
return 0;
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 6fe6ce9..c1bd8f1 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -10,6 +10,9 @@
struct ext4_allocation_context;
struct ext4_allocation_request;
struct ext4_prealloc_space;
+struct ext4_inode_info;
+
+#define EXT4_I(inode) (container_of(inode, struct ext4_inode_info, vfs_inode))
TRACE_EVENT(ext4_free_inode,
TP_PROTO(struct inode *inode),
@@ -710,6 +713,30 @@
__entry->wait)
);
+TRACE_EVENT(ext4_alloc_da_blocks,
+ TP_PROTO(struct inode *inode),
+
+ TP_ARGS(inode),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( ino_t, ino )
+ __field( unsigned int, data_blocks )
+ __field( unsigned int, meta_blocks )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->data_blocks = EXT4_I(inode)->i_reserved_data_blocks;
+ __entry->meta_blocks = EXT4_I(inode)->i_reserved_meta_blocks;
+ ),
+
+ TP_printk("dev %s ino %lu data_blocks %u meta_blocks %u",
+ jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
+ __entry->data_blocks, __entry->meta_blocks)
+);
+
#endif /* _TRACE_EXT4_H */
/* This part must be outside protection */