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NFSv4: Add tracepoints for debugging reads and writes

Browse source 
Set up tracepoints to track read, write and commit, as well as
pNFS reads and writes and commits to the data server.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2013-08-14 15:31:28 -04:00
parent b5f875a925
commit cc668ab30b
5 changed files with 169 additions and 0 deletions
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4
fs/nfs/nfs4filelayout.c
View file

@ -39,6 +39,7 @@
#include "internal.h"
#include "delegation.h"
#include "nfs4filelayout.h"
#include "nfs4trace.h"
#define NFSDBG_FACILITY NFSDBG_PNFS_LD
@ -247,6 +248,7 @@ static int filelayout_read_done_cb(struct rpc_task *task,
struct nfs_pgio_header *hdr = data->header;
int err;
trace_nfs4_pnfs_read(data, task->tk_status);
err = filelayout_async_handle_error(task, data->args.context->state,
data->ds_clp, hdr->lseg);
@ -363,6 +365,7 @@ static int filelayout_write_done_cb(struct rpc_task *task,
struct nfs_pgio_header *hdr = data->header;
int err;
trace_nfs4_pnfs_write(data, task->tk_status);
err = filelayout_async_handle_error(task, data->args.context->state,
data->ds_clp, hdr->lseg);
@ -395,6 +398,7 @@ static int filelayout_commit_done_cb(struct rpc_task *task,
{
int err;
trace_nfs4_pnfs_commit_ds(data, task->tk_status);
err = filelayout_async_handle_error(task, NULL, data->ds_clp,
data->lseg);

3
fs/nfs/nfs4proc.c
View file

@ -3881,6 +3881,7 @@ static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
{
struct nfs_server *server = NFS_SERVER(data->header->inode);
trace_nfs4_read(data, task->tk_status);
if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
rpc_restart_call_prepare(task);
return -EAGAIN;
@ -3942,6 +3943,7 @@ static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data
{
struct inode *inode = data->header->inode;
trace_nfs4_write(data, task->tk_status);
if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
rpc_restart_call_prepare(task);
return -EAGAIN;
@ -4033,6 +4035,7 @@ static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *da
{
struct inode *inode = data->inode;
trace_nfs4_commit(data, task->tk_status);
if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
rpc_restart_call_prepare(task);
return -EAGAIN;

5
fs/nfs/nfs4trace.c
View file

@ -8,3 +8,8 @@
#define CREATE_TRACE_POINTS
#include "nfs4trace.h"
#ifdef CONFIG_NFS_V4_1
EXPORT_TRACEPOINT_SYMBOL_GPL(nfs4_pnfs_read);
EXPORT_TRACEPOINT_SYMBOL_GPL(nfs4_pnfs_write);
EXPORT_TRACEPOINT_SYMBOL_GPL(nfs4_pnfs_commit_ds);
#endif

154
fs/nfs/nfs4trace.h
View file

@ -742,6 +742,160 @@ DEFINE_NFS4_IDMAP_EVENT(nfs4_map_group_to_gid);
DEFINE_NFS4_IDMAP_EVENT(nfs4_map_uid_to_name);
DEFINE_NFS4_IDMAP_EVENT(nfs4_map_gid_to_group);
DECLARE_EVENT_CLASS(nfs4_read_event,
TP_PROTO(
const struct nfs_read_data *data,
int error
),
TP_ARGS(data, error),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(u32, fhandle)
__field(u64, fileid)
__field(loff_t, offset)
__field(size_t, count)
__field(int, error)
),
TP_fast_assign(
const struct inode *inode = data->header->inode;
__entry->dev = inode->i_sb->s_dev;
__entry->fileid = NFS_FILEID(inode);
__entry->fhandle = nfs_fhandle_hash(NFS_FH(inode));
__entry->offset = data->args.offset;
__entry->count = data->args.count;
__entry->error = error;
),
TP_printk(
"error=%d (%s) fileid=%02x:%02x:%llu fhandle=0x%08x "
"offset=%lld count=%zu",
__entry->error,
show_nfsv4_errors(__entry->error),
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long long)__entry->fileid,
__entry->fhandle,
(long long)__entry->offset,
__entry->count
)
);
#define DEFINE_NFS4_READ_EVENT(name) \
DEFINE_EVENT(nfs4_read_event, name, \
TP_PROTO( \
const struct nfs_read_data *data, \
int error \
), \
TP_ARGS(data, error))
DEFINE_NFS4_READ_EVENT(nfs4_read);
#ifdef CONFIG_NFS_V4_1
DEFINE_NFS4_READ_EVENT(nfs4_pnfs_read);
#endif /* CONFIG_NFS_V4_1 */
DECLARE_EVENT_CLASS(nfs4_write_event,
TP_PROTO(
const struct nfs_write_data *data,
int error
),
TP_ARGS(data, error),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(u32, fhandle)
__field(u64, fileid)
__field(loff_t, offset)
__field(size_t, count)
__field(int, error)
),
TP_fast_assign(
const struct inode *inode = data->header->inode;
__entry->dev = inode->i_sb->s_dev;
__entry->fileid = NFS_FILEID(inode);
__entry->fhandle = nfs_fhandle_hash(NFS_FH(inode));
__entry->offset = data->args.offset;
__entry->count = data->args.count;
__entry->error = error;
),
TP_printk(
"error=%d (%s) fileid=%02x:%02x:%llu fhandle=0x%08x "
"offset=%lld count=%zu",
__entry->error,
show_nfsv4_errors(__entry->error),
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long long)__entry->fileid,
__entry->fhandle,
(long long)__entry->offset,
__entry->count
)
);
#define DEFINE_NFS4_WRITE_EVENT(name) \
DEFINE_EVENT(nfs4_write_event, name, \
TP_PROTO( \
const struct nfs_write_data *data, \
int error \
), \
TP_ARGS(data, error))
DEFINE_NFS4_WRITE_EVENT(nfs4_write);
#ifdef CONFIG_NFS_V4_1
DEFINE_NFS4_WRITE_EVENT(nfs4_pnfs_write);
#endif /* CONFIG_NFS_V4_1 */
DECLARE_EVENT_CLASS(nfs4_commit_event,
TP_PROTO(
const struct nfs_commit_data *data,
int error
),
TP_ARGS(data, error),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(u32, fhandle)
__field(u64, fileid)
__field(loff_t, offset)
__field(size_t, count)
__field(int, error)
),
TP_fast_assign(
const struct inode *inode = data->inode;
__entry->dev = inode->i_sb->s_dev;
__entry->fileid = NFS_FILEID(inode);
__entry->fhandle = nfs_fhandle_hash(NFS_FH(inode));
__entry->offset = data->args.offset;
__entry->count = data->args.count;
__entry->error = error;
),
TP_printk(
"error=%d (%s) fileid=%02x:%02x:%llu fhandle=0x%08x "
"offset=%lld count=%zu",
__entry->error,
show_nfsv4_errors(__entry->error),
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long long)__entry->fileid,
__entry->fhandle,
(long long)__entry->offset,
__entry->count
)
);
#define DEFINE_NFS4_COMMIT_EVENT(name) \
DEFINE_EVENT(nfs4_commit_event, name, \
TP_PROTO( \
const struct nfs_commit_data *data, \
int error \
), \
TP_ARGS(data, error))
DEFINE_NFS4_COMMIT_EVENT(nfs4_commit);
#ifdef CONFIG_NFS_V4_1
DEFINE_NFS4_COMMIT_EVENT(nfs4_pnfs_commit_ds);
#endif /* CONFIG_NFS_V4_1 */
#endif /* _TRACE_NFS4_H */
#undef TRACE_INCLUDE_PATH

3
fs/nfs/pnfs.c
View file

@ -33,6 +33,7 @@
#include "internal.h"
#include "pnfs.h"
#include "iostat.h"
#include "nfs4trace.h"
#define NFSDBG_FACILITY NFSDBG_PNFS
#define PNFS_LAYOUTGET_RETRY_TIMEOUT (120*HZ)
@ -1526,6 +1527,7 @@ void pnfs_ld_write_done(struct nfs_write_data *data)
{
struct nfs_pgio_header *hdr = data->header;
trace_nfs4_pnfs_write(data, hdr->pnfs_error);
if (!hdr->pnfs_error) {
pnfs_set_layoutcommit(data);
hdr->mds_ops->rpc_call_done(&data->task, data);
@ -1680,6 +1682,7 @@ void pnfs_ld_read_done(struct nfs_read_data *data)
{
struct nfs_pgio_header *hdr = data->header;
trace_nfs4_pnfs_read(data, hdr->pnfs_error);
if (likely(!hdr->pnfs_error)) {
__nfs4_read_done_cb(data);
hdr->mds_ops->rpc_call_done(&data->task, data);