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xfs: add tracepoints for high level iunlink operations 

Add tracepoints so we can associate high level operations with low level
updates.  No functional changes.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
This commit is contained in:
Darrick J. Wong 2019-02-07 10:37:16 -08:00
parent b1d2a068ea
commit 4664c66c91
2 changed files with 28 additions and 0 deletions
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3
fs/xfs/xfs_inode.c
View File

@ -2047,6 +2047,7 @@ xfs_iunlink(
int error;
ASSERT(VFS_I(ip)->i_mode != 0);
trace_xfs_iunlink(ip);
/* Get the agi buffer first. It ensures lock ordering on the list. */
error = xfs_read_agi(mp, tp, agno, &agibp);
@ -2193,6 +2194,8 @@ xfs_iunlink_remove(
short bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS;
int error;
trace_xfs_iunlink_remove(ip);
/* Get the agi buffer first. It ensures lock ordering on the list. */
error = xfs_read_agi(mp, tp, agno, &agibp);
if (error)

25
fs/xfs/xfs_trace.h
View File

@ -3423,6 +3423,31 @@ TRACE_EVENT(xfs_iunlink_update_dinode,
__entry->new_ptr)
);
DECLARE_EVENT_CLASS(xfs_ag_inode_class,
TP_PROTO(struct xfs_inode *ip),
TP_ARGS(ip),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(xfs_agnumber_t, agno)
__field(xfs_agino_t, agino)
),
TP_fast_assign(
__entry->dev = VFS_I(ip)->i_sb->s_dev;
__entry->agno = XFS_INO_TO_AGNO(ip->i_mount, ip->i_ino);
__entry->agino = XFS_INO_TO_AGINO(ip->i_mount, ip->i_ino);
),
TP_printk("dev %d:%d agno %u agino %u",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->agno, __entry->agino)
)
#define DEFINE_AGINODE_EVENT(name) \
DEFINE_EVENT(xfs_ag_inode_class, name, \
TP_PROTO(struct xfs_inode *ip), \
TP_ARGS(ip))
DEFINE_AGINODE_EVENT(xfs_iunlink);
DEFINE_AGINODE_EVENT(xfs_iunlink_remove);
#endif /* _TRACE_XFS_H */
#undef TRACE_INCLUDE_PATH