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authorJeff Layton <jlayton@poochiereds.net>2015-12-10 10:41:58 -0500
committerTrond Myklebust <trond.myklebust@primarydata.com>2015-12-28 09:57:14 -0500
commit9a4bf31d05a801e2358d96f69b39fb8ce2c69dd8 (patch)
treec132b620128e2035a56baa9b3314d0aaf909647b /include/linux/nfs4.h
parent9759b0fb1d202e6bc9bdab10612189abc9389df8 (diff)
nfs: add new tracepoint for pnfs_update_layout
pnfs_update_layout is really the "nexus" of layout handling. If it returns NULL then we end up going through the MDS. This patch adds some tracepoints to that function that allow us to determine the cause when we end up going through the MDS unexpectedly. Signed-off-by: Jeff Layton <jeff.layton@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'include/linux/nfs4.h')
-rw-r--r--include/linux/nfs4.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index e7e78537aea2..0e30f2c5ff49 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -592,4 +592,18 @@ enum data_content4 {
NFS4_CONTENT_HOLE = 1,
};
+enum pnfs_update_layout_reason {
+ PNFS_UPDATE_LAYOUT_UNKNOWN = 0,
+ PNFS_UPDATE_LAYOUT_NO_PNFS,
+ PNFS_UPDATE_LAYOUT_RD_ZEROLEN,
+ PNFS_UPDATE_LAYOUT_MDSTHRESH,
+ PNFS_UPDATE_LAYOUT_NOMEM,
+ PNFS_UPDATE_LAYOUT_BULK_RECALL,
+ PNFS_UPDATE_LAYOUT_IO_TEST_FAIL,
+ PNFS_UPDATE_LAYOUT_FOUND_CACHED,
+ PNFS_UPDATE_LAYOUT_RETURN,
+ PNFS_UPDATE_LAYOUT_BLOCKED,
+ PNFS_UPDATE_LAYOUT_SEND_LAYOUTGET,
+};
+
#endif