ext4: Add new ext4 trim tracepoints

Add ext4_trim_extent and ext4_trim_all_free.

Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

2 files changed, 53 insertions, 0 deletions

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 4a25725e9157..7aa4c16caca1 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4780,6 +4780,8 @@ static void ext4_trim_extent(struct super_block *sb, int start, int count,
 {
         struct ext4_free_extent ex;
 
+        trace_ext4_trim_extent(sb, group, start, count);
+
         assert_spin_locked(ext4_group_lock_ptr(sb, group));
 
         ex.fe_start = start;
@@ -4825,6 +4827,8 @@ ext4_trim_all_free(struct super_block *sb, ext4_group_t group,
         struct ext4_buddy e4b;
         int ret;
 
+        trace_ext4_trim_all_free(sb, group, start, max);
+
         ret = ext4_mb_load_buddy(sb, group, &e4b);
         if (ret) {
                 ext4_error(sb, "Error in loading buddy "
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 6f27a59fc90d..51d88139eb8c 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -1542,6 +1542,55 @@ TRACE_EVENT(ext4_journal_start,
                   __entry->nblocks, (void *)__entry->ip)
 );
 
+DECLARE_EVENT_CLASS(ext4__trim,
+        TP_PROTO(struct super_block *sb,
+                 ext4_group_t group,
+                 ext4_grpblk_t start,
+                 ext4_grpblk_t len),
+
+        TP_ARGS(sb, group, start, len),
+
+        TP_STRUCT__entry(
+                __field(        int,    dev_major               )
+                __field(        int,    dev_minor               )
+                __field(        __u32,  group                   )
+                __field(        int,    start                   )
+                __field(        int,    len                     )
+        ),
+
+        TP_fast_assign(
+                __entry->dev_major      = MAJOR(sb->s_dev);
+                __entry->dev_minor      = MINOR(sb->s_dev);
+                __entry->group          = group;
+                __entry->start          = start;
+                __entry->len            = len;
+        ),
+
+        TP_printk("dev %d,%d group %u, start %d, len %d",
+                  __entry->dev_major, __entry->dev_minor,
+                  __entry->group, __entry->start, __entry->len)
+);
+
+DEFINE_EVENT(ext4__trim, ext4_trim_extent,
+
+        TP_PROTO(struct super_block *sb,
+                 ext4_group_t group,
+                 ext4_grpblk_t start,
+                 ext4_grpblk_t len),
+
+        TP_ARGS(sb, group, start, len)
+);
+
+DEFINE_EVENT(ext4__trim, ext4_trim_all_free,
+
+        TP_PROTO(struct super_block *sb,
+                 ext4_group_t group,
+                 ext4_grpblk_t start,
+                 ext4_grpblk_t len),
+
+        TP_ARGS(sb, group, start, len)
+);
+
 #endif /* _TRACE_EXT4_H */
 
 /* This part must be outside protection */