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Subject[PATCH 5/6] staging/lustre/obd: Remove nid_stats tracking
Date
From: Oleg Drokin <green@linuxhacker.ru>

This nid_stats tracking only makes sense on the server side,
on the client there are no other clients to keep track of anyway.

Signed-off-by: Dmitry Eremin <dmiter4ever@gmail.com>
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
drivers/staging/lustre/lustre/include/dt_object.h | 1 -
.../staging/lustre/lustre/include/lprocfs_status.h | 15 ----
drivers/staging/lustre/lustre/include/lu_object.h | 2 -
.../staging/lustre/lustre/include/lustre_export.h | 29 -------
drivers/staging/lustre/lustre/include/obd.h | 3 -
drivers/staging/lustre/lustre/include/obd_class.h | 18 ----
.../lustre/lustre/obdclass/lprocfs_status.c | 96 ----------------------
.../staging/lustre/lustre/obdclass/obd_config.c | 80 ------------------
8 files changed, 244 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/dt_object.h b/drivers/staging/lustre/lustre/include/dt_object.h
index be4c7d9..866d04b 100644
--- a/drivers/staging/lustre/lustre/include/dt_object.h
+++ b/drivers/staging/lustre/lustre/include/dt_object.h
@@ -58,7 +58,6 @@
#include "../../include/linux/libcfs/libcfs.h"

struct seq_file;
-struct proc_dir_entry;
struct lustre_cfg;

struct thandle;
diff --git a/drivers/staging/lustre/lustre/include/lprocfs_status.h b/drivers/staging/lustre/lustre/include/lprocfs_status.h
index 4b8c265..6a77ea8 100644
--- a/drivers/staging/lustre/lustre/include/lprocfs_status.h
+++ b/drivers/staging/lustre/lustre/include/lprocfs_status.h
@@ -558,7 +558,6 @@ extern void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
extern void lprocfs_free_obd_stats(struct obd_device *obddev);
extern void lprocfs_free_md_stats(struct obd_device *obddev);
struct obd_export;
-struct nid_stat;
extern int lprocfs_add_clear_entry(struct obd_device *obd,
struct proc_dir_entry *entry);
extern int lprocfs_exp_cleanup(struct obd_export *exp);
@@ -573,11 +572,6 @@ extern struct proc_dir_entry *lprocfs_add_simple(struct proc_dir_entry *root,
extern struct dentry *
ldebugfs_add_symlink(const char *name, struct dentry *parent,
const char *format, ...);
-extern void lprocfs_free_per_client_stats(struct obd_device *obd);
-extern int
-lprocfs_nid_stats_clear_write(struct file *file, const char *buffer,
- unsigned long count, void *data);
-extern int lprocfs_nid_stats_clear_read(struct seq_file *m, void *data);

extern int ldebugfs_register_stats(struct dentry *parent,
const char *name,
@@ -909,15 +903,6 @@ static inline struct proc_dir_entry *
lprocfs_add_simple(struct proc_dir_entry *root, char *name,
void *data, struct file_operations *fops)
{return 0; }
-static inline void lprocfs_free_per_client_stats(struct obd_device *obd)
-{ return; }
-static inline
-int lprocfs_nid_stats_clear_write(struct file *file, const char *buffer,
- unsigned long count, void *data)
-{return count;}
-static inline
-int lprocfs_nid_stats_clear_read(struct seq_file *m, void *data)
-{ return 0; }

static inline struct proc_dir_entry *
lprocfs_register(const char *name, struct proc_dir_entry *parent,
diff --git a/drivers/staging/lustre/lustre/include/lu_object.h b/drivers/staging/lustre/lustre/include/lu_object.h
index c8cc48f..e1d72a7 100644
--- a/drivers/staging/lustre/lustre/include/lu_object.h
+++ b/drivers/staging/lustre/lustre/include/lu_object.h
@@ -43,7 +43,6 @@
#include "lu_ref.h"

struct seq_file;
-struct proc_dir_entry;
struct lustre_cfg;
struct lprocfs_stats;

@@ -277,7 +276,6 @@ struct lu_device {
* Stack this device belongs to.
*/
struct lu_site *ld_site;
- struct proc_dir_entry *ld_proc_entry;

/** \todo XXX: temporary back pointer into obd. */
struct obd_device *ld_obd;
diff --git a/drivers/staging/lustre/lustre/include/lustre_export.h b/drivers/staging/lustre/lustre/include/lustre_export.h
index 9c06a49..3b992b4 100644
--- a/drivers/staging/lustre/lustre/include/lustre_export.h
+++ b/drivers/staging/lustre/lustre/include/lustre_export.h
@@ -106,34 +106,6 @@ struct mgs_export_data {
spinlock_t med_lock; /* protect med_clients */
};

-/**
- * per-NID statistics structure.
- * It tracks access patterns to this export on a per-client-NID basis
- */
-struct nid_stat {
- lnet_nid_t nid;
- struct hlist_node nid_hash;
- struct list_head nid_list;
- struct obd_device *nid_obd;
- struct proc_dir_entry *nid_proc;
- struct lprocfs_stats *nid_stats;
- struct lprocfs_stats *nid_ldlm_stats;
- atomic_t nid_exp_ref_count; /* for obd_nid_stats_hash
- exp_nid_stats */
-};
-
-#define nidstat_getref(nidstat) \
-do { \
- atomic_inc(&(nidstat)->nid_exp_ref_count); \
-} while (0)
-
-#define nidstat_putref(nidstat) \
-do { \
- atomic_dec(&(nidstat)->nid_exp_ref_count); \
- LASSERTF(atomic_read(&(nidstat)->nid_exp_ref_count) >= 0, \
- "stat %p nid_exp_ref_count < 0\n", nidstat); \
-} while (0)
-
enum obd_option {
OBD_OPT_FORCE = 0x0001,
OBD_OPT_FAILOVER = 0x0002,
@@ -190,7 +162,6 @@ struct obd_export {
* exp_lock protect its change
*/
struct obd_import *exp_imp_reverse;
- struct nid_stat *exp_nid_stats;
struct lprocfs_stats *exp_md_stats;
/** Active connection */
struct ptlrpc_connection *exp_connection;
diff --git a/drivers/staging/lustre/lustre/include/obd.h b/drivers/staging/lustre/lustre/include/obd.h
index 5268ae5..7067693 100644
--- a/drivers/staging/lustre/lustre/include/obd.h
+++ b/drivers/staging/lustre/lustre/include/obd.h
@@ -845,9 +845,6 @@ struct obd_device {
struct cfs_hash *obd_uuid_hash;
/* nid-export hash body */
struct cfs_hash *obd_nid_hash;
- /* nid stats body */
- struct cfs_hash *obd_nid_stats_hash;
- struct list_head obd_nid_stats;
atomic_t obd_refcount;
wait_queue_head_t obd_refcount_waitq;
struct list_head obd_exports;
diff --git a/drivers/staging/lustre/lustre/include/obd_class.h b/drivers/staging/lustre/lustre/include/obd_class.h
index 98b397e..63f5224 100644
--- a/drivers/staging/lustre/lustre/include/obd_class.h
+++ b/drivers/staging/lustre/lustre/include/obd_class.h
@@ -378,10 +378,6 @@ static inline int obd_check_dev_active(struct obd_device *obd)
OBD_COUNTER_OFFSET(op); \
LASSERT(coffset < (export)->exp_obd->obd_stats->ls_num); \
lprocfs_counter_incr((export)->exp_obd->obd_stats, coffset); \
- if ((export)->exp_nid_stats != NULL && \
- (export)->exp_nid_stats->nid_stats != NULL) \
- lprocfs_counter_incr( \
- (export)->exp_nid_stats->nid_stats, coffset);\
}

#define MD_COUNTER_OFFSET(op) \
@@ -418,20 +414,6 @@ static inline int obd_check_dev_active(struct obd_device *obd)
#define EXP_MD_COUNTER_INCREMENT(exp, op)
#endif

-static inline int lprocfs_nid_ldlm_stats_init(struct nid_stat *tmp)
-{
- /* Always add in ldlm_stats */
- tmp->nid_ldlm_stats = lprocfs_alloc_stats(LDLM_LAST_OPC - LDLM_FIRST_OPC
- ,LPROCFS_STATS_FLAG_NOPERCPU);
- if (tmp->nid_ldlm_stats == NULL)
- return -ENOMEM;
-
- lprocfs_init_ldlm_stats(tmp->nid_ldlm_stats);
-
- return lprocfs_register_stats(tmp->nid_proc, "ldlm_stats",
- tmp->nid_ldlm_stats);
-}
-
#define OBD_CHECK_MD_OP(obd, op, err) \
do { \
if (!OBT(obd) || !MDP((obd), op)) { \
diff --git a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
index 3ef5474..f44c746 100644
--- a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
+++ b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
@@ -1106,46 +1106,6 @@ int lprocfs_obd_cleanup(struct obd_device *obd)
}
EXPORT_SYMBOL(lprocfs_obd_cleanup);

-static void lprocfs_free_client_stats(struct nid_stat *client_stat)
-{
- CDEBUG(D_CONFIG, "stat %p - data %p/%p\n", client_stat,
- client_stat->nid_proc, client_stat->nid_stats);
-
- LASSERTF(atomic_read(&client_stat->nid_exp_ref_count) == 0,
- "nid %s:count %d\n", libcfs_nid2str(client_stat->nid),
- atomic_read(&client_stat->nid_exp_ref_count));
-
- if (client_stat->nid_proc)
- lprocfs_remove(&client_stat->nid_proc);
-
- if (client_stat->nid_stats)
- lprocfs_free_stats(&client_stat->nid_stats);
-
- if (client_stat->nid_ldlm_stats)
- lprocfs_free_stats(&client_stat->nid_ldlm_stats);
-
- kfree(client_stat);
- return;
-
-}
-
-void lprocfs_free_per_client_stats(struct obd_device *obd)
-{
- struct cfs_hash *hash = obd->obd_nid_stats_hash;
- struct nid_stat *stat;
-
- /* we need extra list - because hash_exit called to early */
- /* not need locking because all clients is died */
- while (!list_empty(&obd->obd_nid_stats)) {
- stat = list_entry(obd->obd_nid_stats.next,
- struct nid_stat, nid_list);
- list_del_init(&stat->nid_list);
- cfs_hash_del(hash, &stat->nid, &stat->nid_hash);
- lprocfs_free_client_stats(stat);
- }
-}
-EXPORT_SYMBOL(lprocfs_free_per_client_stats);
-
int lprocfs_stats_alloc_one(struct lprocfs_stats *stats, unsigned int cpuid)
{
struct lprocfs_counter *cntr;
@@ -1679,64 +1639,8 @@ void lprocfs_init_ldlm_stats(struct lprocfs_stats *ldlm_stats)
}
EXPORT_SYMBOL(lprocfs_init_ldlm_stats);

-int lprocfs_nid_stats_clear_read(struct seq_file *m, void *data)
-{
- seq_printf(m, "%s\n",
- "Write into this file to clear all nid stats and stale nid entries");
- return 0;
-}
-EXPORT_SYMBOL(lprocfs_nid_stats_clear_read);
-
-static int lprocfs_nid_stats_clear_write_cb(void *obj, void *data)
-{
- struct nid_stat *stat = obj;
-
- CDEBUG(D_INFO, "refcnt %d\n", atomic_read(&stat->nid_exp_ref_count));
- if (atomic_read(&stat->nid_exp_ref_count) == 1) {
- /* object has only hash references. */
- spin_lock(&stat->nid_obd->obd_nid_lock);
- list_move(&stat->nid_list, data);
- spin_unlock(&stat->nid_obd->obd_nid_lock);
- return 1;
- }
- /* we has reference to object - only clear data*/
- if (stat->nid_stats)
- lprocfs_clear_stats(stat->nid_stats);
-
- return 0;
-}
-
-int lprocfs_nid_stats_clear_write(struct file *file, const char *buffer,
- unsigned long count, void *data)
-{
- struct obd_device *obd = (struct obd_device *)data;
- struct nid_stat *client_stat;
- LIST_HEAD(free_list);
-
- cfs_hash_cond_del(obd->obd_nid_stats_hash,
- lprocfs_nid_stats_clear_write_cb, &free_list);
-
- while (!list_empty(&free_list)) {
- client_stat = list_entry(free_list.next, struct nid_stat,
- nid_list);
- list_del_init(&client_stat->nid_list);
- lprocfs_free_client_stats(client_stat);
- }
-
- return count;
-}
-EXPORT_SYMBOL(lprocfs_nid_stats_clear_write);
-
int lprocfs_exp_cleanup(struct obd_export *exp)
{
- struct nid_stat *stat = exp->exp_nid_stats;
-
- if (!stat || !exp->exp_obd)
- return 0;
-
- nidstat_putref(exp->exp_nid_stats);
- exp->exp_nid_stats = NULL;
-
return 0;
}
EXPORT_SYMBOL(lprocfs_exp_cleanup);
diff --git a/drivers/staging/lustre/lustre/obdclass/obd_config.c b/drivers/staging/lustre/lustre/obdclass/obd_config.c
index 0bda9c5..19d4eb0 100644
--- a/drivers/staging/lustre/lustre/obdclass/obd_config.c
+++ b/drivers/staging/lustre/lustre/obdclass/obd_config.c
@@ -49,7 +49,6 @@

static cfs_hash_ops_t uuid_hash_ops;
static cfs_hash_ops_t nid_hash_ops;
-static cfs_hash_ops_t nid_stat_hash_ops;

/*********** string parsing utils *********/

@@ -383,7 +382,6 @@ int class_attach(struct lustre_cfg *lcfg)
INIT_LIST_HEAD(&obd->obd_unlinked_exports);
INIT_LIST_HEAD(&obd->obd_delayed_exports);
INIT_LIST_HEAD(&obd->obd_exports_timed);
- INIT_LIST_HEAD(&obd->obd_nid_stats);
spin_lock_init(&obd->obd_nid_lock);
spin_lock_init(&obd->obd_dev_lock);
mutex_init(&obd->obd_dev_mutex);
@@ -486,7 +484,6 @@ int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
obd->obd_starting = 1;
obd->obd_uuid_hash = NULL;
obd->obd_nid_hash = NULL;
- obd->obd_nid_stats_hash = NULL;
spin_unlock(&obd->obd_dev_lock);

/* create an uuid-export lustre hash */
@@ -515,19 +512,6 @@ int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
goto err_hash;
}

- /* create a nid-stats lustre hash */
- obd->obd_nid_stats_hash = cfs_hash_create("NID_STATS",
- HASH_NID_STATS_CUR_BITS,
- HASH_NID_STATS_MAX_BITS,
- HASH_NID_STATS_BKT_BITS, 0,
- CFS_HASH_MIN_THETA,
- CFS_HASH_MAX_THETA,
- &nid_stat_hash_ops, CFS_HASH_DEFAULT);
- if (!obd->obd_nid_stats_hash) {
- err = -ENOMEM;
- goto err_hash;
- }
-
exp = class_new_export(obd, &obd->obd_uuid);
if (IS_ERR(exp)) {
err = PTR_ERR(exp);
@@ -567,10 +551,6 @@ err_hash:
cfs_hash_putref(obd->obd_nid_hash);
obd->obd_nid_hash = NULL;
}
- if (obd->obd_nid_stats_hash) {
- cfs_hash_putref(obd->obd_nid_stats_hash);
- obd->obd_nid_stats_hash = NULL;
- }
obd->obd_starting = 0;
CERROR("setup %s failed (%d)\n", obd->obd_name, err);
return err;
@@ -694,12 +674,6 @@ int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
obd->obd_nid_hash = NULL;
}

- /* destroy a nid-stats hash body */
- if (obd->obd_nid_stats_hash) {
- cfs_hash_putref(obd->obd_nid_stats_hash);
- obd->obd_nid_stats_hash = NULL;
- }
-
class_decref(obd, "setup", obd);
obd->obd_set_up = 0;

@@ -1893,57 +1867,3 @@ static cfs_hash_ops_t nid_hash_ops = {
.hs_get = nid_export_get,
.hs_put_locked = nid_export_put_locked,
};
-
-
-/*
- * nid<->nidstats hash operations
- */
-
-static void *
-nidstats_key(struct hlist_node *hnode)
-{
- struct nid_stat *ns;
-
- ns = hlist_entry(hnode, struct nid_stat, nid_hash);
-
- return &ns->nid;
-}
-
-static int
-nidstats_keycmp(const void *key, struct hlist_node *hnode)
-{
- return *(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key;
-}
-
-static void *
-nidstats_object(struct hlist_node *hnode)
-{
- return hlist_entry(hnode, struct nid_stat, nid_hash);
-}
-
-static void
-nidstats_get(struct cfs_hash *hs, struct hlist_node *hnode)
-{
- struct nid_stat *ns;
-
- ns = hlist_entry(hnode, struct nid_stat, nid_hash);
- nidstat_getref(ns);
-}
-
-static void
-nidstats_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
-{
- struct nid_stat *ns;
-
- ns = hlist_entry(hnode, struct nid_stat, nid_hash);
- nidstat_putref(ns);
-}
-
-static cfs_hash_ops_t nid_stat_hash_ops = {
- .hs_hash = nid_hash,
- .hs_key = nidstats_key,
- .hs_keycmp = nidstats_keycmp,
- .hs_object = nidstats_object,
- .hs_get = nidstats_get,
- .hs_put_locked = nidstats_put_locked,
-};
--
2.1.0


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