3 files changed, 203 insertions, 2 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);
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 5a7edf90ca45..5a825502b0b0 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -19,6 +19,7 @@
 #include "f2fs.h"
 #include "node.h"
 #include "segment.h"
+#include <trace/events/f2fs.h>
 
 static struct kmem_cache *nat_entry_slab;
 static struct kmem_cache *free_nid_slab;
@@ -508,6 +509,7 @@ invalidate:
 
         f2fs_put_page(dn->node_page, 1);
         dn->node_page = NULL;
+        trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr);
 }
 
 static int truncate_dnode(struct dnode_of_data *dn)
@@ -548,9 +550,13 @@ static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs,
         if (dn->nid == 0)
                 return NIDS_PER_BLOCK + 1;
 
+        trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr);
+
         page = get_node_page(sbi, dn->nid);
-        if (IS_ERR(page))
+        if (IS_ERR(page)) {
+                trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(page));
                 return PTR_ERR(page);
+        }
 
         rn = (struct f2fs_node *)page_address(page);
         if (depth < 3) {
@@ -592,10 +598,12 @@ static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs,
         } else {
                 f2fs_put_page(page, 1);
         }
+        trace_f2fs_truncate_nodes_exit(dn->inode, freed);
         return freed;
 
 out_err:
         f2fs_put_page(page, 1);
+        trace_f2fs_truncate_nodes_exit(dn->inode, ret);
         return ret;
 }
 
@@ -650,6 +658,9 @@ static int truncate_partial_nodes(struct dnode_of_data *dn,
 fail:
         for (i = depth - 3; i >= 0; i--)
                 f2fs_put_page(pages[i], 1);
+
+        trace_f2fs_truncate_partial_nodes(dn->inode, nid, depth, err);
+
         return err;
 }
 
@@ -666,11 +677,15 @@ int truncate_inode_blocks(struct inode *inode, pgoff_t from)
         struct dnode_of_data dn;
         struct page *page;
 
+        trace_f2fs_truncate_inode_blocks_enter(inode, from);
+
         level = get_node_path(from, offset, noffset);
 
         page = get_node_page(sbi, inode->i_ino);
-        if (IS_ERR(page))
+        if (IS_ERR(page)) {
+                trace_f2fs_truncate_inode_blocks_exit(inode, PTR_ERR(page));
                 return PTR_ERR(page);
+        }
 
         set_new_dnode(&dn, inode, page, NULL, 0);
         unlock_page(page);
@@ -740,6 +755,7 @@ skip_partial:
         }
 fail:
         f2fs_put_page(page, 0);
+        trace_f2fs_truncate_inode_blocks_exit(inode, err);
         return err > 0 ? 0 : err;
 }
 
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 03bb0dbf468d..4bbd19f79d27 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -189,6 +189,182 @@ DEFINE_EVENT(f2fs__inode_exit, f2fs_unlink_exit,
 
         TP_ARGS(inode, ret)
 );
+
+DEFINE_EVENT(f2fs__inode, f2fs_truncate,
+
+        TP_PROTO(struct inode *inode),
+
+        TP_ARGS(inode)
+);
+
+TRACE_EVENT(f2fs_truncate_data_blocks_range,
+
+        TP_PROTO(struct inode *inode, nid_t nid, unsigned int ofs, int free),
+
+        TP_ARGS(inode, nid,  ofs, free),
+
+        TP_STRUCT__entry(
+                __field(dev_t,  dev)
+                __field(ino_t,  ino)
+                __field(nid_t,  nid)
+                __field(unsigned int,   ofs)
+                __field(int,    free)
+        ),
+
+        TP_fast_assign(
+                __entry->dev    = inode->i_sb->s_dev;
+                __entry->ino    = inode->i_ino;
+                __entry->nid    = nid;
+                __entry->ofs    = ofs;
+                __entry->free   = free;
+        ),
+
+        TP_printk("dev = (%d,%d), ino = %lu, nid = %u, offset = %u, freed = %d",
+                show_dev_ino(__entry),
+                (unsigned int)__entry->nid,
+                __entry->ofs,
+                __entry->free)
+);
+
+DECLARE_EVENT_CLASS(f2fs__truncate_op,
+
+        TP_PROTO(struct inode *inode, u64 from),
+
+        TP_ARGS(inode, from),
+
+        TP_STRUCT__entry(
+                __field(dev_t,  dev)
+                __field(ino_t,  ino)
+                __field(loff_t, size)
+                __field(blkcnt_t, blocks)
+                __field(u64,    from)
+        ),
+
+        TP_fast_assign(
+                __entry->dev    = inode->i_sb->s_dev;
+                __entry->ino    = inode->i_ino;
+                __entry->size   = inode->i_size;
+                __entry->blocks = inode->i_blocks;
+                __entry->from   = from;
+        ),
+
+        TP_printk("dev = (%d,%d), ino = %lu, i_size = %lld, i_blocks = %llu, "
+                "start file offset = %llu",
+                show_dev_ino(__entry),
+                __entry->size,
+                (unsigned long long)__entry->blocks,
+                (unsigned long long)__entry->from)
+);
+
+DEFINE_EVENT(f2fs__truncate_op, f2fs_truncate_blocks_enter,
+
+        TP_PROTO(struct inode *inode, u64 from),
+
+        TP_ARGS(inode, from)
+);
+
+DEFINE_EVENT(f2fs__inode_exit, f2fs_truncate_blocks_exit,
+
+        TP_PROTO(struct inode *inode, int ret),
+
+        TP_ARGS(inode, ret)
+);
+
+DEFINE_EVENT(f2fs__truncate_op, f2fs_truncate_inode_blocks_enter,
+
+        TP_PROTO(struct inode *inode, u64 from),
+
+        TP_ARGS(inode, from)
+);
+
+DEFINE_EVENT(f2fs__inode_exit, f2fs_truncate_inode_blocks_exit,
+
+        TP_PROTO(struct inode *inode, int ret),
+
+        TP_ARGS(inode, ret)
+);
+
+DECLARE_EVENT_CLASS(f2fs__truncate_node,
+
+        TP_PROTO(struct inode *inode, nid_t nid, block_t blk_addr),
+
+        TP_ARGS(inode, nid, blk_addr),
+
+        TP_STRUCT__entry(
+                __field(dev_t,  dev)
+                __field(ino_t,  ino)
+                __field(nid_t,  nid)
+                __field(block_t,        blk_addr)
+        ),
+
+        TP_fast_assign(
+                __entry->dev            = inode->i_sb->s_dev;
+                __entry->ino            = inode->i_ino;
+                __entry->nid            = nid;
+                __entry->blk_addr       = blk_addr;
+        ),
+
+        TP_printk("dev = (%d,%d), ino = %lu, nid = %u, block_address = 0x%llx",
+                show_dev_ino(__entry),
+                (unsigned int)__entry->nid,
+                (unsigned long long)__entry->blk_addr)
+);
+
+DEFINE_EVENT(f2fs__truncate_node, f2fs_truncate_nodes_enter,
+
+        TP_PROTO(struct inode *inode, nid_t nid, block_t blk_addr),
+
+        TP_ARGS(inode, nid, blk_addr)
+);
+
+DEFINE_EVENT(f2fs__inode_exit, f2fs_truncate_nodes_exit,
+
+        TP_PROTO(struct inode *inode, int ret),
+
+        TP_ARGS(inode, ret)
+);
+
+DEFINE_EVENT(f2fs__truncate_node, f2fs_truncate_node,
+
+        TP_PROTO(struct inode *inode, nid_t nid, block_t blk_addr),
+
+        TP_ARGS(inode, nid, blk_addr)
+);
+
+TRACE_EVENT(f2fs_truncate_partial_nodes,
+
+        TP_PROTO(struct inode *inode, nid_t nid[], int depth, int err),
+
+        TP_ARGS(inode, nid, depth, err),
+
+        TP_STRUCT__entry(
+                __field(dev_t,  dev)
+                __field(ino_t,  ino)
+                __field(nid_t,  nid[3])
+                __field(int,    depth)
+                __field(int,    err)
+        ),
+
+        TP_fast_assign(
+                __entry->dev    = inode->i_sb->s_dev;
+                __entry->ino    = inode->i_ino;
+                __entry->nid[0] = nid[0];
+                __entry->nid[1] = nid[1];
+                __entry->nid[2] = nid[2];
+                __entry->depth  = depth;
+                __entry->err    = err;
+        ),
+
+        TP_printk("dev = (%d,%d), ino = %lu, "
+                "nid[0] = %u, nid[1] = %u, nid[2] = %u, depth = %d, err = %d",
+                show_dev_ino(__entry),
+                (unsigned int)__entry->nid[0],
+                (unsigned int)__entry->nid[1],
+                (unsigned int)__entry->nid[2],
+                __entry->depth,
+                __entry->err)
+);
+
 #endif /* _TRACE_F2FS_H */
 
  /* This part must be outside protection */