[PATCH 08/24] netfs: Reserve netfs_sreq_source 0 as unset/unknown
From: David Howells <dhowells@redhat.com>
Date: 2024-07-29 16:21:22
Also in:
ceph-devel, linux-cifs, linux-fsdevel, linux-mm, linux-nfs, lkml, netfs, v9fs
Subsystem:
filesystems [netfs library], the rest, tracing · Maintainers:
David Howells, Paulo Alcantara, Linus Torvalds, Steven Rostedt, Masami Hiramatsu
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@redhat.com> cc: Jeff Layton <jlayton@kernel.org> cc: netfs@lists.linux.dev cc: linux-fsdevel@vger.kernel.org --- 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 aada40d2182b..5e623e52e5a2 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 fc5dbd19f120..bd4f6f1f1040 100644
--- a/include/trace/events/netfs.h
+++ b/include/trace/events/netfs.h@@ -59,6 +59,7 @@ 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") \