Reserve the 0-valued netfs_sreq_source to mean unset or unknown so that it
can be seen in the trace as such rather than appearing as
download-from-server when it's going to get switched to something else.
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
cc: Jeff Layton <jlayton@xxxxxxxxxx>
cc: netfs@xxxxxxxxxxxxxxx
cc: linux-fsdevel@xxxxxxxxxxxxxxx
---
include/linux/netfs.h | 1 +
include/trace/events/netfs.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/include/linux/netfs.h b/include/linux/netfs.h
index 11fa86640d91..16834751e646 100644
--- a/include/linux/netfs.h
+++ b/include/linux/netfs.h
@@ -43,6 +43,7 @@ static inline void folio_start_private_2(struct folio *folio)
#define NETFS_BUF_PAGECACHE_MARK XA_MARK_1 /* - Page needs wb/dirty flag wrangling */
enum netfs_io_source {
+ NETFS_SOURCE_UNKNOWN,
NETFS_FILL_WITH_ZEROES,
NETFS_DOWNLOAD_FROM_SERVER,
NETFS_READ_FROM_CACHE,
diff --git a/include/trace/events/netfs.h b/include/trace/events/netfs.h
index a4fd5dea52f4..f4105b8e5894 100644
--- a/include/trace/events/netfs.h
+++ b/include/trace/events/netfs.h
@@ -60,6 +60,7 @@
E_(netfs_rreq_trace_write_done, "WR-DONE")
#define netfs_sreq_sources \
+ EM(NETFS_SOURCE_UNKNOWN, "----") \
EM(NETFS_FILL_WITH_ZEROES, "ZERO") \
EM(NETFS_DOWNLOAD_FROM_SERVER, "DOWN") \
EM(NETFS_READ_FROM_CACHE, "READ") \
