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NFS: Add trace events to report non-zero NFS status codes

Browse Source 
These can help field troubleshooting without needing the overhead
of a full network capture (ie, tcpdump).

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2019-02-11 11:24:26 -05:00 committed by Anna Schumaker
parent eb72f484a5
commit f23f658404
6 changed files with 133 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
fs/nfs/nfs2xdr.c
View File

@ -22,6 +22,7 @@
#include <linux/nfs.h>
#include <linux/nfs2.h>
#include <linux/nfs_fs.h>
#include "nfstrace.h"
#include "internal.h"
#define NFSDBG_FACILITY NFSDBG_XDR
@ -145,7 +146,13 @@ static int decode_stat(struct xdr_stream *xdr, enum nfs_stat *status)
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
return -EIO;
if (unlikely(*p != cpu_to_be32(NFS_OK)))
goto out_status;
*status = 0;
return 0;
out_status:
*status = be32_to_cpup(p);
trace_nfs_xdr_status((int)*status);
return 0;
}

7
fs/nfs/nfs3xdr.c
View File

@ -21,6 +21,7 @@
#include <linux/nfs3.h>
#include <linux/nfs_fs.h>
#include <linux/nfsacl.h>
#include "nfstrace.h"
#include "internal.h"
#define NFSDBG_FACILITY NFSDBG_XDR
@ -337,7 +338,13 @@ static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status)
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
return -EIO;
if (unlikely(*p != cpu_to_be32(NFS3_OK)))
goto out_status;
*status = 0;
return 0;
out_status:
*status = be32_to_cpup(p);
trace_nfs_xdr_status((int)*status);
return 0;
}

25
fs/nfs/nfs4trace.h
View File

@ -524,6 +524,31 @@ TRACE_EVENT(nfs4_setup_sequence,
)
);
TRACE_EVENT(nfs4_xdr_status,
TP_PROTO(
u32 op,
int error
),
TP_ARGS(op, error),
TP_STRUCT__entry(
__field(u32, op)
__field(int, error)
),
TP_fast_assign(
__entry->op = op;
__entry->error = -error;
),
TP_printk(
"operation %d: nfs status %d (%s)",
__entry->op,
__entry->error, show_nfsv4_errors(__entry->error)
)
);
DECLARE_EVENT_CLASS(nfs4_open_event,
TP_PROTO(
const struct nfs_open_context *ctx,

12
fs/nfs/nfs4xdr.c
View File

@ -54,6 +54,7 @@
#include <linux/nfs_fs.h>
#include "nfs4_fs.h"
#include "nfs4trace.h"
#include "internal.h"
#include "nfs4idmap.h"
#include "nfs4session.h"
@ -3188,11 +3189,14 @@ static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
opnum = be32_to_cpup(p++);
if (unlikely(opnum != expected))
goto out_bad_operation;
if (unlikely(*p != cpu_to_be32(NFS_OK)))
goto out_status;
*nfs_retval = 0;
return true;
out_status:
nfserr = be32_to_cpup(p);
if (nfserr == NFS_OK)
*nfs_retval = 0;
else
*nfs_retval = nfs4_stat_to_errno(nfserr);
trace_nfs4_xdr_status(opnum, nfserr);
*nfs_retval = nfs4_stat_to_errno(nfserr);
return true;
out_bad_operation:
dprintk("nfs: Server returned operation"

1
fs/nfs/nfstrace.c
View File

@ -11,3 +11,4 @@
EXPORT_TRACEPOINT_SYMBOL_GPL(nfs_fsync_enter);
EXPORT_TRACEPOINT_SYMBOL_GPL(nfs_fsync_exit);
EXPORT_TRACEPOINT_SYMBOL_GPL(nfs_xdr_status);

85
fs/nfs/nfstrace.h
View File

@ -969,6 +969,91 @@ TRACE_EVENT(nfs_commit_done,
)
);
TRACE_DEFINE_ENUM(NFS_OK);
TRACE_DEFINE_ENUM(NFSERR_PERM);
TRACE_DEFINE_ENUM(NFSERR_NOENT);
TRACE_DEFINE_ENUM(NFSERR_IO);
TRACE_DEFINE_ENUM(NFSERR_NXIO);
TRACE_DEFINE_ENUM(NFSERR_ACCES);
TRACE_DEFINE_ENUM(NFSERR_EXIST);
TRACE_DEFINE_ENUM(NFSERR_XDEV);
TRACE_DEFINE_ENUM(NFSERR_NODEV);
TRACE_DEFINE_ENUM(NFSERR_NOTDIR);
TRACE_DEFINE_ENUM(NFSERR_ISDIR);
TRACE_DEFINE_ENUM(NFSERR_INVAL);
TRACE_DEFINE_ENUM(NFSERR_FBIG);
TRACE_DEFINE_ENUM(NFSERR_NOSPC);
TRACE_DEFINE_ENUM(NFSERR_ROFS);
TRACE_DEFINE_ENUM(NFSERR_MLINK);
TRACE_DEFINE_ENUM(NFSERR_NAMETOOLONG);
TRACE_DEFINE_ENUM(NFSERR_NOTEMPTY);
TRACE_DEFINE_ENUM(NFSERR_DQUOT);
TRACE_DEFINE_ENUM(NFSERR_STALE);
TRACE_DEFINE_ENUM(NFSERR_REMOTE);
TRACE_DEFINE_ENUM(NFSERR_WFLUSH);
TRACE_DEFINE_ENUM(NFSERR_BADHANDLE);
TRACE_DEFINE_ENUM(NFSERR_NOT_SYNC);
TRACE_DEFINE_ENUM(NFSERR_BAD_COOKIE);
TRACE_DEFINE_ENUM(NFSERR_NOTSUPP);
TRACE_DEFINE_ENUM(NFSERR_TOOSMALL);
TRACE_DEFINE_ENUM(NFSERR_SERVERFAULT);
TRACE_DEFINE_ENUM(NFSERR_BADTYPE);
TRACE_DEFINE_ENUM(NFSERR_JUKEBOX);
#define nfs_show_status(x) \
__print_symbolic(x, \
{ NFS_OK, "OK" }, \
{ NFSERR_PERM, "PERM" }, \
{ NFSERR_NOENT, "NOENT" }, \
{ NFSERR_IO, "IO" }, \
{ NFSERR_NXIO, "NXIO" }, \
{ NFSERR_ACCES, "ACCES" }, \
{ NFSERR_EXIST, "EXIST" }, \
{ NFSERR_XDEV, "XDEV" }, \
{ NFSERR_NODEV, "NODEV" }, \
{ NFSERR_NOTDIR, "NOTDIR" }, \
{ NFSERR_ISDIR, "ISDIR" }, \
{ NFSERR_INVAL, "INVAL" }, \
{ NFSERR_FBIG, "FBIG" }, \
{ NFSERR_NOSPC, "NOSPC" }, \
{ NFSERR_ROFS, "ROFS" }, \
{ NFSERR_MLINK, "MLINK" }, \
{ NFSERR_NAMETOOLONG, "NAMETOOLONG" }, \
{ NFSERR_NOTEMPTY, "NOTEMPTY" }, \
{ NFSERR_DQUOT, "DQUOT" }, \
{ NFSERR_STALE, "STALE" }, \
{ NFSERR_REMOTE, "REMOTE" }, \
{ NFSERR_WFLUSH, "WFLUSH" }, \
{ NFSERR_BADHANDLE, "BADHANDLE" }, \
{ NFSERR_NOT_SYNC, "NOTSYNC" }, \
{ NFSERR_BAD_COOKIE, "BADCOOKIE" }, \
{ NFSERR_NOTSUPP, "NOTSUPP" }, \
{ NFSERR_TOOSMALL, "TOOSMALL" }, \
{ NFSERR_SERVERFAULT, "REMOTEIO" }, \
{ NFSERR_BADTYPE, "BADTYPE" }, \
{ NFSERR_JUKEBOX, "JUKEBOX" })
TRACE_EVENT(nfs_xdr_status,
TP_PROTO(
int error
),
TP_ARGS(error),
TP_STRUCT__entry(
__field(int, error)
),
TP_fast_assign(
__entry->error = error;
),
TP_printk(
"error=%d (%s)",
__entry->error, nfs_show_status(__entry->error)
)
);
#endif /* _TRACE_NFS_H */
#undef TRACE_INCLUDE_PATH