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pnfs/flexfiles: Add tracepoints for detecting pnfs fallback to MDS

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Add tracepoints to allow debugging of the event chain leading to
a pnfs fallback to doing I/O through the MDS.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2019-07-18 09:32:17 -04:00
parent 58bbeab425
commit d5b9216fd5
5 changed files with 112 additions and 1 deletions
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1
include/linux/nfs4.h
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@ -660,6 +660,7 @@ enum pnfs_update_layout_reason {
PNFS_UPDATE_LAYOUT_BLOCKED,
PNFS_UPDATE_LAYOUT_INVALID_OPEN,
PNFS_UPDATE_LAYOUT_SEND_LAYOUTGET,
PNFS_UPDATE_LAYOUT_EXIT,
};
#define NFS4_OP_MAP_NUM_LONGS \