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ext4: Add new ext4 inode tracepoints
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Add ext4_evict_inode, ext4_drop_inode, ext4_mark_inode_dirty, and
ext4_begin_ordered_truncate()

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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@tytso
tytso committed Nov 8, 2010
1 parent b56ff9d commit 7ff9c07
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Showing 3 changed files with 110 additions and 0 deletions.
3 changes: 3 additions & 0 deletions fs/ext4/inode.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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,
Expand Down Expand Up @@ -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;
Expand Down Expand Up @@ -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 &&
Expand Down
10 changes: 10 additions & 0 deletions fs/ext4/super.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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);
Expand Down Expand Up @@ -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,
Expand All @@ -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,
Expand Down
97 changes: 97 additions & 0 deletions include/trace/events/ext4.h
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Original file line number Diff line number Diff line change
Expand Up @@ -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,
Expand Down

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