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Commit 7ff9c073 authored by Theodore Ts'o's avatar Theodore Ts'o
Browse files

ext4: Add new ext4 inode tracepoints 



Add ext4_evict_inode, ext4_drop_inode, ext4_mark_inode_dirty, and
ext4_begin_ordered_truncate()

Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
parent b56ff9d3

fs/ext4/inode.c

+3 −0
Original line number Diff line number Diff line
@@ -53,6 +53,7 @@ 
static inline int ext4_begin_ordered_truncate(struct inode *inode,

					      loff_t new_size)

{

	trace_ext4_begin_ordered_truncate(inode, new_size);

	return jbd2_journal_begin_ordered_truncate(

					EXT4_SB(inode->i_sb)->s_journal,

					&EXT4_I(inode)->jinode,
@@ -178,6 +179,7 @@ void ext4_evict_inode(struct inode *inode) 
	handle_t *handle;

	int err;



	trace_ext4_evict_inode(inode);

	if (inode->i_nlink) {

		truncate_inode_pages(&inode->i_data, 0);

		goto no_delete;
@@ -5649,6 +5651,7 @@ int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode) 
	int err, ret;



	might_sleep();

	trace_ext4_mark_inode_dirty(inode, _RET_IP_);

	err = ext4_reserve_inode_write(handle, inode, &iloc);

	if (ext4_handle_valid(handle) &&

	    EXT4_I(inode)->i_extra_isize < sbi->s_want_extra_isize &&

fs/ext4/super.c

+10 −0
Original line number Diff line number Diff line
@@ -833,6 +833,14 @@ static struct inode *ext4_alloc_inode(struct super_block *sb) 
	return &ei->vfs_inode;

}



static int ext4_drop_inode(struct inode *inode)

{

	int drop = generic_drop_inode(inode);



	trace_ext4_drop_inode(inode, drop);

	return drop;

}



static void ext4_destroy_inode(struct inode *inode)

{

	ext4_ioend_wait(inode);
@@ -1175,6 +1183,7 @@ static const struct super_operations ext4_sops = { 
	.destroy_inode	= ext4_destroy_inode,

	.write_inode	= ext4_write_inode,

	.dirty_inode	= ext4_dirty_inode,

	.drop_inode	= ext4_drop_inode,

	.evict_inode	= ext4_evict_inode,

	.put_super	= ext4_put_super,

	.sync_fs	= ext4_sync_fs,
@@ -1196,6 +1205,7 @@ static const struct super_operations ext4_nojournal_sops = { 
	.destroy_inode	= ext4_destroy_inode,

	.write_inode	= ext4_write_inode,

	.dirty_inode	= ext4_dirty_inode,

	.drop_inode	= ext4_drop_inode,

	.evict_inode	= ext4_evict_inode,

	.write_super	= ext4_write_super,

	.put_super	= ext4_put_super,

include/trace/events/ext4.h

+97 −0
Original line number Diff line number Diff line
@@ -98,6 +98,103 @@ TRACE_EVENT(ext4_allocate_inode, 
		  (unsigned long) __entry->dir, __entry->mode)

);



TRACE_EVENT(ext4_evict_inode,

	TP_PROTO(struct inode *inode),



	TP_ARGS(inode),



	TP_STRUCT__entry(

		__field(	int,   dev_major                )

		__field(	int,   dev_minor                )

		__field(	ino_t,	ino			)

		__field(	int,	nlink			)

	),



	TP_fast_assign(

		__entry->dev_major = MAJOR(inode->i_sb->s_dev);

		__entry->dev_minor = MINOR(inode->i_sb->s_dev);

		__entry->ino	= inode->i_ino;

		__entry->nlink	= inode->i_nlink;

	),



	TP_printk("dev %d,%d ino %lu nlink %d",

		  __entry->dev_major, __entry->dev_minor,

		  (unsigned long) __entry->ino, __entry->nlink)

);



TRACE_EVENT(ext4_drop_inode,

	TP_PROTO(struct inode *inode, int drop),



	TP_ARGS(inode, drop),



	TP_STRUCT__entry(

		__field(	int,	dev_major		)

		__field(	int,	dev_minor		)

		__field(	ino_t,	ino			)

		__field(	int,	drop			)

	),



	TP_fast_assign(

		__entry->dev_major = MAJOR(inode->i_sb->s_dev);

		__entry->dev_minor = MINOR(inode->i_sb->s_dev);

		__entry->ino	= inode->i_ino;

		__entry->drop	= drop;

	),



	TP_printk("dev %d,%d ino %lu drop %d",

		  __entry->dev_major, __entry->dev_minor,

		  (unsigned long) __entry->ino, __entry->drop)

);



TRACE_EVENT(ext4_mark_inode_dirty,

	TP_PROTO(struct inode *inode, unsigned long IP),



	TP_ARGS(inode, IP),



	TP_STRUCT__entry(

		__field(	int,	dev_major		)

		__field(	int,	dev_minor		)

		__field(	ino_t,	ino			)

		__field(unsigned long,	ip			)

	),



	TP_fast_assign(

		__entry->dev_major = MAJOR(inode->i_sb->s_dev);

		__entry->dev_minor = MINOR(inode->i_sb->s_dev);

		__entry->ino	= inode->i_ino;

		__entry->ip	= IP;

	),



	TP_printk("dev %d,%d ino %lu caller %pF",

		  __entry->dev_major, __entry->dev_minor,

		  (unsigned long) __entry->ino, (void *)__entry->ip)

);



TRACE_EVENT(ext4_begin_ordered_truncate,

	TP_PROTO(struct inode *inode, loff_t new_size),



	TP_ARGS(inode, new_size),



	TP_STRUCT__entry(

		__field(	int,	dev_major		)

		__field(	int,	dev_minor		)

		__field(	ino_t,	ino			)

		__field(	loff_t,	new_size		)

	),



	TP_fast_assign(

		__entry->dev_major	= MAJOR(inode->i_sb->s_dev);

		__entry->dev_minor	= MINOR(inode->i_sb->s_dev);

		__entry->ino		= inode->i_ino;

		__entry->new_size	= new_size;

	),



	TP_printk("dev %d,%d ino %lu new_size %lld",

		  __entry->dev_major, __entry->dev_minor,

		  (unsigned long) __entry->ino,

		  (long long) __entry->new_size)

);



DECLARE_EVENT_CLASS(ext4__write_begin,



	TP_PROTO(struct inode *inode, loff_t pos, unsigned int len,