[PATCH RFC 17/24] nfs: add cache_validity to the nfs_inode_event tracepoints

Jeff Layton
2024-03-15T16:54:01Z

Managing the cache_validity flags is the deep voodoo of NFS cache
coherency. Let's have a little extra visibility into that value via the
nfs_inode_event tracepoints.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
fs/nfs/nfstrace.h | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/fs/nfs/nfstrace.h b/fs/nfs/nfstrace.h
index afedb449b54f..e0cd3601d1f7 100644
--- a/fs/nfs/nfstrace.h
+++ b/fs/nfs/nfstrace.h
@@ -56,6 +56,7 @@ DECLARE_EVENT_CLASS(nfs_inode_event,
__field(u32, fhandle)
__field(u64, fileid)
__field(u64, version)
+ __field(unsigned long, cache_validity)
),

TP_fast_assign(
@@ -64,14 +65,17 @@ DECLARE_EVENT_CLASS(nfs_inode_event,
__entry->fileid = nfsi->fileid;
__entry->fhandle = nfs_fhandle_hash(&nfsi->fh);
__entry->version = inode_peek_iversion_raw(inode);
+ __entry->cache_validity = nfsi->cache_validity;
),

TP_printk(
- "fileid=%02x:%02x:%llu fhandle=0x%08x version=%llu ",
+ "fileid=%02x:%02x:%llu fhandle=0x%08x version=%llu cache_validity=0x%lx (%s)",
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long long)__entry->fileid,
__entry->fhandle,
- (unsigned long long)__entry->version
+ (unsigned long long)__entry->version,
+ __entry->cache_validity,
+ nfs_show_cache_validity(__entry->cache_validity)
)
);

--
2.44.0