writeback: use ino_t for inodes in tracepoints

Writeback TPs currently use mix of 32 and 64bits for inos. This isn't
currently broken because only cgroup inos are using 32bits and they're
limited to 32bits. cgroup inos will make use of 64bits. Let's
uniformly use ino_t.

While at it, switch the default cgroup ino value used when cgroup is
disabled to 1 instead of -1U as root cgroup always uses ino 1.

Signed-off-by: Tejun Heo <[e-mail]>
Reviewed-by: Jan Kara <[e-mail]>
Reviewed-by: Greg Kroah-Hartman <[e-mail]>
Cc: Jens Axboe <[e-mail]>
Cc: Namhyung Kim <[e-mail]>

include/trace/events/writeback.h

···
 
 	TP_STRUCT__entry (
 		__array(char, name, 32)
-		__field(unsigned long, ino)
+		__field(ino_t, ino)
 		__field(pgoff_t, index)
 	),
 
···
 
 	TP_STRUCT__entry (
 		__array(char, name, 32)
-		__field(unsigned long, ino)
+		__field(ino_t, ino)
 		__field(unsigned long, state)
 		__field(unsigned long, flags)
 	),
···
 #ifdef CREATE_TRACE_POINTS
 #ifdef CONFIG_CGROUP_WRITEBACK
 
-static inline unsigned int __trace_wb_assign_cgroup(struct bdi_writeback *wb)
+static inline ino_t __trace_wb_assign_cgroup(struct bdi_writeback *wb)
 {
 	return wb->memcg_css->cgroup->kn->id.ino;
 }
 
-static inline unsigned int __trace_wbc_assign_cgroup(struct writeback_control *wbc)
+static inline ino_t __trace_wbc_assign_cgroup(struct writeback_control *wbc)
 {
 	if (wbc->wb)
 		return __trace_wb_assign_cgroup(wbc->wb);
 	else
-		return -1U;
+		return 1;
 }
 #else	/* CONFIG_CGROUP_WRITEBACK */
 
-static inline unsigned int __trace_wb_assign_cgroup(struct bdi_writeback *wb)
+static inline ino_t __trace_wb_assign_cgroup(struct bdi_writeback *wb)
 {
-	return -1U;
+	return 1;
 }
 
-static inline unsigned int __trace_wbc_assign_cgroup(struct writeback_control *wbc)
+static inline ino_t __trace_wbc_assign_cgroup(struct writeback_control *wbc)
 {
-	return -1U;
+	return 1;
 }
 
 #endif	/* CONFIG_CGROUP_WRITEBACK */
···
 
 	TP_STRUCT__entry(
 		__array(char,		name, 32)
-		__field(unsigned long,	ino)
-		__field(unsigned int,	cgroup_ino)
+		__field(ino_t,		ino)
+		__field(ino_t,		cgroup_ino)
 		__field(unsigned int,	history)
 	),
 
···
 		__entry->history	= history;
 	),
 
-	TP_printk("bdi %s: ino=%lu cgroup_ino=%u history=0x%x",
+	TP_printk("bdi %s: ino=%lu cgroup_ino=%lu history=0x%x",
 		__entry->name,
 		__entry->ino,
 		__entry->cgroup_ino,
···
 
 	TP_STRUCT__entry(
 		__array(char,		name, 32)
-		__field(unsigned long,	ino)
-		__field(unsigned int,	old_cgroup_ino)
-		__field(unsigned int,	new_cgroup_ino)
+		__field(ino_t,		ino)
+		__field(ino_t,		old_cgroup_ino)
+		__field(ino_t,		new_cgroup_ino)
 	),
 
 	TP_fast_assign(
···
 		__entry->new_cgroup_ino	= __trace_wb_assign_cgroup(new_wb);
 	),
 
-	TP_printk("bdi %s: ino=%lu old_cgroup_ino=%u new_cgroup_ino=%u",
+	TP_printk("bdi %s: ino=%lu old_cgroup_ino=%lu new_cgroup_ino=%lu",
 		__entry->name,
 		__entry->ino,
 		__entry->old_cgroup_ino,
···
 	TP_STRUCT__entry(
 		__array(char,		name, 32)
 		__field(u64,		bdi_id)
-		__field(unsigned long,	ino)
+		__field(ino_t,		ino)
 		__field(unsigned int,	memcg_id)
-		__field(unsigned int,	cgroup_ino)
-		__field(unsigned int,	page_cgroup_ino)
+		__field(ino_t,		cgroup_ino)
+		__field(ino_t,		page_cgroup_ino)
 	),
 
 	TP_fast_assign(
···
 		__entry->page_cgroup_ino = page->mem_cgroup->css.cgroup->kn->id.ino;
 	),
 
-	TP_printk("bdi %s[%llu]: ino=%lu memcg_id=%u cgroup_ino=%u page_cgroup_ino=%u",
+	TP_printk("bdi %s[%llu]: ino=%lu memcg_id=%u cgroup_ino=%lu page_cgroup_ino=%lu",
 		__entry->name,
 		__entry->bdi_id,
 		__entry->ino,
···
 
 	TP_STRUCT__entry(
 		__array(char,		name, 32)
-		__field(unsigned int,	cgroup_ino)
+		__field(ino_t,		cgroup_ino)
 		__field(unsigned int,	frn_bdi_id)
 		__field(unsigned int,	frn_memcg_id)
 	),
···
 		__entry->frn_memcg_id	= frn_memcg_id;
 	),
 
-	TP_printk("bdi %s: cgroup_ino=%u frn_bdi_id=%u frn_memcg_id=%u",
+	TP_printk("bdi %s: cgroup_ino=%lu frn_bdi_id=%u frn_memcg_id=%u",
 		__entry->name,
 		__entry->cgroup_ino,
 		__entry->frn_bdi_id,
···
 
 	TP_STRUCT__entry (
 		__array(char, name, 32)
-		__field(unsigned long, ino)
+		__field(ino_t, ino)
 		__field(int, sync_mode)
-		__field(unsigned int, cgroup_ino)
+		__field(ino_t, cgroup_ino)
 	),
 
 	TP_fast_assign(
···
 		__entry->cgroup_ino	= __trace_wbc_assign_cgroup(wbc);
 	),
 
-	TP_printk("bdi %s: ino=%lu sync_mode=%d cgroup_ino=%u",
+	TP_printk("bdi %s: ino=%lu sync_mode=%d cgroup_ino=%lu",
 		__entry->name,
 		__entry->ino,
 		__entry->sync_mode,
···
 		__field(int, range_cyclic)
 		__field(int, for_background)
 		__field(int, reason)
-		__field(unsigned int, cgroup_ino)
+		__field(ino_t, cgroup_ino)
 	),
 	TP_fast_assign(
 		strscpy_pad(__entry->name,
···
 		__entry->cgroup_ino = __trace_wb_assign_cgroup(wb);
 	),
 	TP_printk("bdi %s: sb_dev %d:%d nr_pages=%ld sync_mode=%d "
-		  "kupdate=%d range_cyclic=%d background=%d reason=%s cgroup_ino=%u",
+		  "kupdate=%d range_cyclic=%d background=%d reason=%s cgroup_ino=%lu",
 		  __entry->name,
 		  MAJOR(__entry->sb_dev), MINOR(__entry->sb_dev),
 		  __entry->nr_pages,
···
 	TP_ARGS(wb),
 	TP_STRUCT__entry(
 		__array(char, name, 32)
-		__field(unsigned int, cgroup_ino)
+		__field(ino_t, cgroup_ino)
 	),
 	TP_fast_assign(
 		strscpy_pad(__entry->name, dev_name(wb->bdi->dev), 32);
 		__entry->cgroup_ino = __trace_wb_assign_cgroup(wb);
 	),
-	TP_printk("bdi %s: cgroup_ino=%u",
+	TP_printk("bdi %s: cgroup_ino=%lu",
 		  __entry->name,
 		  __entry->cgroup_ino
 	)
···
 		__field(int, range_cyclic)
 		__field(long, range_start)
 		__field(long, range_end)
-		__field(unsigned int, cgroup_ino)
+		__field(ino_t, cgroup_ino)
 	),
 
 	TP_fast_assign(
···
 
 	TP_printk("bdi %s: towrt=%ld skip=%ld mode=%d kupd=%d "
 		"bgrd=%d reclm=%d cyclic=%d "
-		"start=0x%lx end=0x%lx cgroup_ino=%u",
+		"start=0x%lx end=0x%lx cgroup_ino=%lu",
 		__entry->name,
 		__entry->nr_to_write,
 		__entry->pages_skipped,
···
 		__field(long,		age)
 		__field(int,		moved)
 		__field(int,		reason)
-		__field(unsigned int,	cgroup_ino)
+		__field(ino_t,		cgroup_ino)
 	),
 	TP_fast_assign(
 		unsigned long *older_than_this = work->older_than_this;
···
 		__entry->reason	= work->reason;
 		__entry->cgroup_ino	= __trace_wb_assign_cgroup(wb);
 	),
-	TP_printk("bdi %s: older=%lu age=%ld enqueue=%d reason=%s cgroup_ino=%u",
+	TP_printk("bdi %s: older=%lu age=%ld enqueue=%d reason=%s cgroup_ino=%lu",
 		__entry->name,
 		__entry->older,	/* older_than_this in jiffies */
 		__entry->age,	/* older_than_this in relative milliseconds */
···
 		__field(unsigned long,	dirty_ratelimit)
 		__field(unsigned long,	task_ratelimit)
 		__field(unsigned long,	balanced_dirty_ratelimit)
-		__field(unsigned int,	cgroup_ino)
+		__field(ino_t,		cgroup_ino)
 	),
 
 	TP_fast_assign(
···
 	TP_printk("bdi %s: "
 		  "write_bw=%lu awrite_bw=%lu dirty_rate=%lu "
 		  "dirty_ratelimit=%lu task_ratelimit=%lu "
-		  "balanced_dirty_ratelimit=%lu cgroup_ino=%u",
+		  "balanced_dirty_ratelimit=%lu cgroup_ino=%lu",
 		  __entry->bdi,
 		  __entry->write_bw,		/* write bandwidth */
 		  __entry->avg_write_bw,	/* avg write bandwidth */
···
 		__field(	 long,	pause)
 		__field(unsigned long,	period)
 		__field(	 long,	think)
-		__field(unsigned int,	cgroup_ino)
+		__field(ino_t,		cgroup_ino)
 	),
 
 	TP_fast_assign(
···
 		  "bdi_setpoint=%lu bdi_dirty=%lu "
 		  "dirty_ratelimit=%lu task_ratelimit=%lu "
 		  "dirtied=%u dirtied_pause=%u "
-		  "paused=%lu pause=%ld period=%lu think=%ld cgroup_ino=%u",
+		  "paused=%lu pause=%ld period=%lu think=%ld cgroup_ino=%lu",
 		  __entry->bdi,
 		  __entry->limit,
 		  __entry->setpoint,
···
 
 	TP_STRUCT__entry(
 		__array(char, name, 32)
-		__field(unsigned long, ino)
+		__field(ino_t, ino)
 		__field(unsigned long, state)
 		__field(unsigned long, dirtied_when)
-		__field(unsigned int, cgroup_ino)
+		__field(ino_t, cgroup_ino)
 	),
 
 	TP_fast_assign(
···
 		__entry->cgroup_ino	= __trace_wb_assign_cgroup(inode_to_wb(inode));
 	),
 
-	TP_printk("bdi %s: ino=%lu state=%s dirtied_when=%lu age=%lu cgroup_ino=%u",
+	TP_printk("bdi %s: ino=%lu state=%s dirtied_when=%lu age=%lu cgroup_ino=%lu",
 		  __entry->name,
 		  __entry->ino,
 		  show_inode_state(__entry->state),
···
 
 	TP_STRUCT__entry(
 		__array(char, name, 32)
-		__field(unsigned long, ino)
+		__field(ino_t, ino)
 		__field(unsigned long, state)
 		__field(unsigned long, dirtied_when)
 		__field(unsigned long, writeback_index)
 		__field(long, nr_to_write)
 		__field(unsigned long, wrote)
-		__field(unsigned int, cgroup_ino)
+		__field(ino_t, cgroup_ino)
 	),
 
 	TP_fast_assign(
···
 	),
 
 	TP_printk("bdi %s: ino=%lu state=%s dirtied_when=%lu age=%lu "
-		  "index=%lu to_write=%ld wrote=%lu cgroup_ino=%u",
+		  "index=%lu to_write=%ld wrote=%lu cgroup_ino=%lu",
 		  __entry->name,
 		  __entry->ino,
 		  show_inode_state(__entry->state),
···
 
 	TP_STRUCT__entry(
 		__field(	dev_t,	dev			)
-		__field(unsigned long,	ino			)
+		__field(	ino_t,	ino			)
 		__field(unsigned long,	state			)
 		__field(	__u16, mode			)
 		__field(unsigned long, dirtied_when		)