f2fs: add tracepoints for truncate operation

add tracepoints for tracing the truncate operations
like truncate node/data blocks, f2fs_truncate etc.

Tracepoints are added at entry and exit of operation
to trace the success & failure of operation.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Pankaj Kumar <pankaj.km@samsung.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
[Jaegeuk: combine and modify the tracepoint structures]
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 0b0ba26ba76e..71efa373cc45 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -193,6 +193,9 @@ static int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
                 sync_inode_page(dn);
         }
         dn->ofs_in_node = ofs;
+
+        trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
+                                         dn->ofs_in_node, nr_free);
         return nr_free;
 }
 
@@ -229,6 +232,8 @@ static int truncate_blocks(struct inode *inode, u64 from)
         int count = 0, ilock = -1;
         int err;
 
+        trace_f2fs_truncate_blocks_enter(inode, from);
+
         free_from = (pgoff_t)
                         ((from + blocksize - 1) >> (sbi->log_blocksize));
 
@@ -239,6 +244,7 @@ static int truncate_blocks(struct inode *inode, u64 from)
                 if (err == -ENOENT)
                         goto free_next;
                 mutex_unlock_op(sbi, ilock);
+                trace_f2fs_truncate_blocks_exit(inode, err);
                 return err;
         }
 
@@ -263,6 +269,7 @@ free_next:
         /* lastly zero out the first data page */
         truncate_partial_data_page(inode, from);
 
+        trace_f2fs_truncate_blocks_exit(inode, err);
         return err;
 }
 
@@ -272,6 +279,8 @@ void f2fs_truncate(struct inode *inode)
                                 S_ISLNK(inode->i_mode)))
                 return;
 
+        trace_f2fs_truncate(inode);
+
         if (!truncate_blocks(inode, i_size_read(inode))) {
                 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
                 mark_inode_dirty(inode);