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authorJeff Layton <jlayton@poochiereds.net>2015-12-10 18:41:58 +0300
committerTrond Myklebust <trond.myklebust@primarydata.com>2015-12-28 17:57:14 +0300
commit9a4bf31d05a801e2358d96f69b39fb8ce2c69dd8 (patch)
treec132b620128e2035a56baa9b3314d0aaf909647b /fs/nfs/nfs4trace.h
parent9759b0fb1d202e6bc9bdab10612189abc9389df8 (diff)
downloadlinux-9a4bf31d05a801e2358d96f69b39fb8ce2c69dd8.tar.xz
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 'fs/nfs/nfs4trace.h')
-rw-r--r--fs/nfs/nfs4trace.h56
1 files changed, 56 insertions, 0 deletions
diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h
index 8704372ac38f..238925c1aafd 100644
--- a/fs/nfs/nfs4trace.h
+++ b/fs/nfs/nfs4trace.h
@@ -1442,6 +1442,62 @@ DEFINE_NFS4_INODE_STATEID_EVENT(nfs4_layoutcommit);
DEFINE_NFS4_INODE_STATEID_EVENT(nfs4_layoutreturn);
DEFINE_NFS4_INODE_EVENT(nfs4_layoutreturn_on_close);
+#define show_pnfs_update_layout_reason(reason) \
+ __print_symbolic(reason, \
+ { PNFS_UPDATE_LAYOUT_UNKNOWN, "unknown" }, \
+ { PNFS_UPDATE_LAYOUT_NO_PNFS, "no pnfs" }, \
+ { PNFS_UPDATE_LAYOUT_RD_ZEROLEN, "read+zerolen" }, \
+ { PNFS_UPDATE_LAYOUT_MDSTHRESH, "mdsthresh" }, \
+ { PNFS_UPDATE_LAYOUT_NOMEM, "nomem" }, \
+ { PNFS_UPDATE_LAYOUT_BULK_RECALL, "bulk recall" }, \
+ { PNFS_UPDATE_LAYOUT_IO_TEST_FAIL, "io test fail" }, \
+ { PNFS_UPDATE_LAYOUT_FOUND_CACHED, "found cached" }, \
+ { PNFS_UPDATE_LAYOUT_RETURN, "layoutreturn" }, \
+ { PNFS_UPDATE_LAYOUT_BLOCKED, "layouts blocked" }, \
+ { PNFS_UPDATE_LAYOUT_SEND_LAYOUTGET, "sent layoutget" })
+
+TRACE_EVENT(pnfs_update_layout,
+ TP_PROTO(struct inode *inode,
+ loff_t pos,
+ u64 count,
+ enum pnfs_iomode iomode,
+ struct pnfs_layout_segment *lseg,
+ enum pnfs_update_layout_reason reason
+ ),
+ TP_ARGS(inode, pos, count, iomode, lseg, reason),
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(u64, fileid)
+ __field(u32, fhandle)
+ __field(loff_t, pos)
+ __field(u64, count)
+ __field(enum pnfs_iomode, iomode)
+ __field(struct pnfs_layout_segment *, lseg)
+ __field(enum pnfs_update_layout_reason, reason)
+ ),
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->fileid = NFS_FILEID(inode);
+ __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode));
+ __entry->pos = pos;
+ __entry->count = count;
+ __entry->iomode = iomode;
+ __entry->lseg = lseg;
+ __entry->reason = reason;
+ ),
+ TP_printk(
+ "fileid=%02x:%02x:%llu fhandle=0x%08x "
+ "iomode=%s pos=%llu count=%llu lseg=%p (%s)",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long long)__entry->fileid,
+ __entry->fhandle,
+ show_pnfs_iomode(__entry->iomode),
+ (unsigned long long)__entry->pos,
+ (unsigned long long)__entry->count, __entry->lseg,
+ show_pnfs_update_layout_reason(__entry->reason)
+ )
+);
+
#endif /* CONFIG_NFS_V4_1 */
#endif /* _TRACE_NFS4_H */