[PATCH 09/11] xfs: add a tracepoint for blockgc scans

Darrick J. Wong
2021-01-23T18:53:43Z

From: Darrick J. Wong <djwong@kernel.org>

Add some tracepoints so that we can observe when the speculative
preallocation garbage collector runs.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
fs/xfs/xfs_ioctl.c | 2 ++
fs/xfs/xfs_trace.c | 1 +
fs/xfs/xfs_trace.h | 39 +++++++++++++++++++++++++++++++++++++++
3 files changed, 42 insertions(+)

diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 952eca338807..da407934364c 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -2356,6 +2356,8 @@ xfs_file_ioctl(
if (error)
return error;

+ trace_xfs_ioc_free_eofblocks(mp, &keofb, _RET_IP_);
+
sb_start_write(mp->m_super);
error = xfs_icache_free_eofblocks(mp, &keofb);
sb_end_write(mp->m_super);
diff --git a/fs/xfs/xfs_trace.c b/fs/xfs/xfs_trace.c
index 120398a37c2a..9b8d703dc9fd 100644
--- a/fs/xfs/xfs_trace.c
+++ b/fs/xfs/xfs_trace.c
@@ -29,6 +29,7 @@
#include "xfs_filestream.h"
#include "xfs_fsmap.h"
#include "xfs_btree_staging.h"
+#include "xfs_icache.h"

/*
* We include this last to have the helpers above available for the trace
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index 407c3a5208ab..4cbf446bae9a 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -37,6 +37,7 @@ struct xfs_trans_res;
struct xfs_inobt_rec_incore;
union xfs_btree_ptr;
struct xfs_dqtrx;
+struct xfs_eofblocks;

#define XFS_ATTR_FILTER_FLAGS \
{ XFS_ATTR_ROOT, "ROOT" }, \
@@ -3888,6 +3889,44 @@ DEFINE_EVENT(xfs_timestamp_range_class, name, \
DEFINE_TIMESTAMP_RANGE_EVENT(xfs_inode_timestamp_range);
DEFINE_TIMESTAMP_RANGE_EVENT(xfs_quota_expiry_range);

+DECLARE_EVENT_CLASS(xfs_eofblocks_class,
+ TP_PROTO(struct xfs_mount *mp, struct xfs_eofblocks *eofb,
+ unsigned long caller_ip),
+ TP_ARGS(mp, eofb, caller_ip),
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(__u32, flags)
+ __field(uint32_t, uid)
+ __field(uint32_t, gid)
+ __field(prid_t, prid)
+ __field(__u64, min_file_size)
+ __field(unsigned long, caller_ip)
+ ),
+ TP_fast_assign(
+ __entry->dev = mp->m_super->s_dev;
+ __entry->flags = eofb->eof_flags;
+ __entry->uid = from_kuid(mp->m_super->s_user_ns, eofb->eof_uid);
+ __entry->gid = from_kgid(mp->m_super->s_user_ns, eofb->eof_gid);
+ __entry->prid = eofb->eof_prid;
+ __entry->min_file_size = eofb->eof_min_file_size;
+ __entry->caller_ip = caller_ip;
+ ),
+ TP_printk("dev %d:%d flags 0x%x uid %u gid %u prid %u minsize %llu caller %pS",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ __entry->flags,
+ __entry->uid,
+ __entry->gid,
+ __entry->prid,
+ __entry->min_file_size,
+ (char *)__entry->caller_ip)
+);
+#define DEFINE_EOFBLOCKS_EVENT(name) \
+DEFINE_EVENT(xfs_eofblocks_class, name, \
+ TP_PROTO(struct xfs_mount *mp, struct xfs_eofblocks *eofb, \
+ unsigned long caller_ip), \
+ TP_ARGS(mp, eofb, caller_ip))
+DEFINE_EOFBLOCKS_EVENT(xfs_ioc_free_eofblocks);
+
#endif /* _TRACE_XFS_H */

#undef TRACE_INCLUDE_PATH