ext4: Add new tracepoints to debug delayed allocation space functions

Add tracepoints for ext4_da_reserve_space(),
ext4_da_update_reserve_space(), and ext4_da_release_space().

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 3e8afd96923..1a3d7b232cd 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1061,6 +1061,7 @@ void ext4_da_update_reserve_space(struct inode *inode,
         int mdb_free = 0, allocated_meta_blocks = 0;
 
         spin_lock(&ei->i_block_reservation_lock);
+        trace_ext4_da_update_reserve_space(inode, used);
         if (unlikely(used > ei->i_reserved_data_blocks)) {
                 ext4_msg(inode->i_sb, KERN_NOTICE, "%s: ino %lu, used %d "
                          "with only %d reserved data blocks\n",
@@ -1846,6 +1847,7 @@ repeat:
         spin_lock(&ei->i_block_reservation_lock);
         md_reserved = ei->i_reserved_meta_blocks;
         md_needed = ext4_calc_metadata_amount(inode, lblock);
+        trace_ext4_da_reserve_space(inode, md_needed);
         spin_unlock(&ei->i_block_reservation_lock);
 
         /*