[PATCH v4 5/7] ntfs3: add allocation tracepoints

[Baolin Liu]

From: Baolin Liu <liubaolin@xxxxxxxxxx>

Add ntfs3 tracepoints for allocation operations.

This adds trace events for attr_allocate_clusters(),
attr_set_size_ex(), and attr_data_get_block() to help
observe cluster allocation, size changes, and block
mapping activity.

Signed-off-by: Baolin Liu <liubaolin@xxxxxxxxxx>
---
 fs/ntfs3/attrib.c            | 12 ++++++
 include/trace/events/ntfs3.h | 78 ++++++++++++++++++++++++++++++++++++
 2 files changed, 90 insertions(+)

diff --git a/fs/ntfs3/attrib.c b/fs/ntfs3/attrib.c
index c621a4c582f9..8c4a14a87721 100644
--- a/fs/ntfs3/attrib.c
+++ b/fs/ntfs3/attrib.c
@@ -13,6 +13,7 @@
 #include "debug.h"
 #include "ntfs.h"
 #include "ntfs_fs.h"
+#include <trace/events/ntfs3.h>
 
 /*
  * You can set external NTFS_MIN_LOG2_OF_CLUMP/NTFS_MAX_LOG2_OF_CLUMP to manage
@@ -167,6 +168,8 @@ int attr_allocate_clusters(struct ntfs_sb_info *sbi, struct runs_tree *run,
 	CLST flen, vcn0 = vcn, pre = pre_alloc ? *pre_alloc : 0;
 	size_t cnt = run->count;
 
+	trace_ntfs3_attr_allocate_clusters(sbi->sb, vcn, lcn, len, opt);
+
 	for (;;) {
 		err = ntfs_look_for_free_space(sbi, lcn, len + pre, &lcn, &flen,
 					       opt);
@@ -462,6 +465,12 @@ int attr_set_size_ex(struct ntfs_inode *ni, enum ATTR_TYPE type,
 		goto bad_inode;
 	}
 
+	trace_ntfs3_attr_set_size_ex(&ni->vfs_inode, le32_to_cpu(type),
+				     attr_b->non_res ?
+					     le64_to_cpu(attr_b->nres.data_size) :
+					     le32_to_cpu(attr_b->res.data_size),
+				     new_size, keep_prealloc, no_da);
+
 	if (!attr_b->non_res) {
 		err = attr_set_size_res(ni, attr_b, le_b, mi_b, new_size, run,
 					&attr_b);
@@ -960,6 +969,9 @@ int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
 	if (res)
 		*res = NULL;
 
+	trace_ntfs3_attr_data_get_block(&ni->vfs_inode, vcn, clen, new, zero,
+					no_da);
+
 	/* Try to find in cache. */
 	down_read(&ni->file.run_lock);
 	if (run_lookup_entry_da(&ni->file.run, !no_da ? &ni->file.run_da : NULL,
diff --git a/include/trace/events/ntfs3.h b/include/trace/events/ntfs3.h
index 4ac05ed29e49..e39765bc062f 100644
--- a/include/trace/events/ntfs3.h
+++ b/include/trace/events/ntfs3.h
@@ -223,6 +223,84 @@ TRACE_EVENT(ntfs3_indx_delete_entry,
 		  __entry->ino, __entry->type, __entry->key_len)
 );
 
+TRACE_EVENT(ntfs3_attr_allocate_clusters,
+	TP_PROTO(struct super_block *sb, u64 vcn, u64 lcn, u64 len, u32 opt),
+	TP_ARGS(sb, vcn, lcn, len, opt),
+	TP_STRUCT__entry(
+		__field(u64, vcn)
+		__field(u64, lcn)
+		__field(u64, len)
+		__field(dev_t, dev)
+		__field(u32, opt)
+	),
+	TP_fast_assign(
+		__entry->vcn = vcn;
+		__entry->lcn = lcn;
+		__entry->len = len;
+		__entry->dev = sb->s_dev;
+		__entry->opt = opt;
+	),
+	TP_printk("dev=(%d,%d) vcn=%llu lcn=%llu len=%llu opt=0x%x",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->vcn, __entry->lcn, __entry->len, __entry->opt)
+);
+
+TRACE_EVENT(ntfs3_attr_set_size_ex,
+	TP_PROTO(struct inode *inode, u32 type, u64 old_size, u64 new_size,
+		 bool keep_prealloc, bool no_da),
+	TP_ARGS(inode, type, old_size, new_size, keep_prealloc, no_da),
+	TP_STRUCT__entry(
+		__field(u64, old_size)
+		__field(u64, new_size)
+		__field(unsigned long, ino)
+		__field(dev_t, dev)
+		__field(u32, type)
+		__field(bool, keep_prealloc)
+		__field(bool, no_da)
+	),
+	TP_fast_assign(
+		__entry->old_size = old_size;
+		__entry->new_size = new_size;
+		__entry->ino = inode->i_ino;
+		__entry->dev = inode->i_sb->s_dev;
+		__entry->type = type;
+		__entry->keep_prealloc = keep_prealloc;
+		__entry->no_da = no_da;
+	),
+	TP_printk("dev=(%d,%d) ino=%lu type=0x%x old_size=%llu new_size=%llu keep_prealloc=%d no_da=%d",
+		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->ino,
+		  __entry->type, __entry->old_size, __entry->new_size,
+		  __entry->keep_prealloc, __entry->no_da)
+);
+
+TRACE_EVENT(ntfs3_attr_data_get_block,
+	TP_PROTO(struct inode *inode, u64 vcn, u64 clen, bool *new,
+		 bool zero, bool no_da),
+	TP_ARGS(inode, vcn, clen, new, zero, no_da),
+	TP_STRUCT__entry(
+		__field(u64, vcn)
+		__field(u64, clen)
+		__field(unsigned long, ino)
+		__field(dev_t, dev)
+		__field(bool, create)
+		__field(bool, zero)
+		__field(bool, no_da)
+	),
+	TP_fast_assign(
+		__entry->vcn = vcn;
+		__entry->clen = clen;
+		__entry->ino = inode->i_ino;
+		__entry->dev = inode->i_sb->s_dev;
+		__entry->create = !!new;
+		__entry->zero = zero;
+		__entry->no_da = no_da;
+	),
+	TP_printk("dev=(%d,%d) ino=%lu vcn=%llu clen=%llu create=%d zero=%d no_da=%d",
+		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->ino,
+		  __entry->vcn, __entry->clen, __entry->create,
+		  __entry->zero, __entry->no_da)
+);
+
 #endif /* _TRACE_NTFS3_H */
 
 #include <trace/define_trace.h>
-- 
2.51.0