Statistics code cleanups. Would not have been needed for the following
changes - just done along the way.
- make function void
- found more handy names for a few identifiers
Signed-off-by: Martin Peschke <[email protected]>
---
drivers/s390/scsi/zfcp_def.h | 4
include/linux/statistic.h | 27 +++---
lib/statistic.c | 177 ++++++++++++++++++++-----------------------
3 files changed, 100 insertions(+), 108 deletions(-)
Index: linux/include/linux/statistic.h
===================================================================
--- linux.orig/include/linux/statistic.h
+++ linux/include/linux/statistic.h
@@ -36,7 +36,7 @@
*
* Exploiters must setup an array of struct statistic_info for a
* corresponding array of struct statistic, which are then pointed to
- * by struct statistic_interface.
+ * by struct statistic_ui.
*
* Struct statistic_info and all members and addressed strings must stay for
* the lifetime of corresponding statistics created with statistic_create().
@@ -108,7 +108,7 @@ struct statistic {
};
/**
- * struct statistic_interface - collection of statistics for an entity
+ * struct statistic_ui - collection of statistics for an entity
* @stat: a struct statistic array
* @info: a struct statistic_info array describing the struct statistic array
* @number: number of entries in both arrays
@@ -116,29 +116,29 @@ struct statistic {
* @label: an optional function retrieving a label for each statistics entry
* @private: optional data pointer reserved for use by clients
*
- * Exploiters must setup a struct statistic_interface prior to calling
+ * Exploiters must setup a struct statistic_ui prior to calling
* statistic_create().
*/
-struct statistic_interface {
+struct statistic_ui {
/* private: */
struct list_head list;
- void *debugfs_dir;
- void *data_file;
- void *def_file;
+ void *dir;
+ void *data;
+ void *def;
/* public: */
struct statistic *stat;
struct statistic_info *info;
int number;
- int (*pull)(struct statistic_interface *interface);
- void (*label)(struct statistic_interface *interface,
+ void (*pull)(struct statistic_ui *ui);
+ void (*label)(struct statistic_ui *ui,
int i, void *key, char *buf, int size);
void *private;
};
#ifdef CONFIG_STATISTICS
-extern int statistic_create(struct statistic_interface *, const char *);
-extern int statistic_remove(struct statistic_interface *);
+extern int statistic_create(struct statistic_ui *, const char *);
+extern int statistic_remove(struct statistic_ui *);
extern void statistic_set(struct statistic *, int, s64, u64);
extern void statistic_set_key(struct statistic *, int, void *, u64);
@@ -313,13 +313,12 @@ static inline void statistic_add_as_key(
#else /* !CONFIG_STATISTICS */
/* These NOP functions unburden clients from handling !CONFIG_STATISTICS. */
-static inline int statistic_create(struct statistic_interface *interface,
- const char *name)
+static inline int statistic_create(struct statistic_ui *ui, const char *name)
{
return 0;
}
-static inline int statistic_remove(struct statistic_interface *interface)
+static inline int statistic_remove(struct statistic_ui *ui)
{
return 0;
}
Index: linux/lib/statistic.c
===================================================================
--- linux.orig/lib/statistic.c
+++ linux/lib/statistic.c
@@ -94,7 +94,7 @@ struct statistic_discipline {
void (*merge)(struct statistic *stat, void *dst, void *src);
void (*def)(struct statistic *stat, struct seq_file *seq);
void (*data)(struct statistic *stat, struct seq_file *seq,
- struct statistic_interface *interface, int i);
+ struct statistic_ui *ui, int i);
void (*add)(struct statistic *stat, s64 value, u64 incr);
void (*set)(struct statistic *stat, s64 value, u64 total);
void (*kadd)(struct statistic *stat, void *key, u64 incr);
@@ -256,10 +256,10 @@ static void _statistic_merge(void *__mpr
spin_unlock(&mpriv->lock);
}
-static void *statistic_merge(struct statistic_interface *interface, int i)
+static void *statistic_merge(struct statistic_ui *ui, int i)
{
- struct statistic *stat = &interface->stat[i];
- struct statistic_info *info = &interface->info[i];
+ struct statistic *stat = &ui->stat[i];
+ struct statistic_info *info = &ui->info[i];
struct statistic_discipline *disc = &statistic_discs[stat->type];
struct statistic_merge_private mpriv;
size_t size = disc->size(stat);
@@ -280,11 +280,11 @@ static void *statistic_merge(struct stat
/* cpu hotplug handling for per-cpu data */
-static int _statistic_hotcpu(struct statistic_interface *interface,
- int i, unsigned long action, int cpu)
+static int _statistic_hotcpu(struct statistic_ui *ui, int i,
+ unsigned long action, int cpu)
{
- struct statistic *stat = &interface->stat[i];
- struct statistic_info *info = &interface->info[i];
+ struct statistic *stat = &ui->stat[i];
+ struct statistic_info *info = &ui->info[i];
struct statistic_discipline *disc = &statistic_discs[stat->type];
void *src, *dst;
size_t size;
@@ -326,12 +326,12 @@ static int __cpuinit statistic_hotcpu(st
unsigned long action, void *__cpu)
{
int cpu = (unsigned long)__cpu, i, retval = NOTIFY_OK;
- struct statistic_interface *interface;
+ struct statistic_ui *ui;
mutex_lock(&statistic_list_mutex);
- list_for_each_entry(interface, &statistic_list, list)
- for (i = 0; i < interface->number; i++) {
- retval = _statistic_hotcpu(interface, i, action, cpu);
+ list_for_each_entry(ui, &statistic_list, list)
+ for (i = 0; i < ui->number; i++) {
+ retval = _statistic_hotcpu(ui, i, action, cpu);
if (retval == NOTIFY_BAD)
goto unlock;
}
@@ -433,15 +433,14 @@ static match_table_t statistic_match_com
{9999, NULL}
};
-static void statistic_parse_line(struct statistic_interface *interface,
- char *def)
+static void statistic_parse_line(struct statistic_ui *ui, char *def)
{
char *name = NULL;
substring_t args[MAX_OPT_ARGS], sub;
int token, reset = 0, defaults = 0, i;
int state = STATISTIC_STATE_INVALID;
- struct statistic *stat = interface->stat;
- struct statistic_info *info = interface->info;
+ struct statistic *stat = ui->stat;
+ struct statistic_info *info = ui->info;
if (unlikely(!def))
return;
@@ -466,7 +465,7 @@ static void statistic_parse_line(struct
break;
}
}
- for (i = 0; i < interface->number; i++, stat++, info++) {
+ for (i = 0; i < ui->number; i++, stat++, info++) {
if (!name || (name && !strcmp(name, info->name))) {
if (defaults)
statistic_parse_match(stat, info, NULL);
@@ -484,10 +483,10 @@ static void statistic_parse_line(struct
/* sequential files comprising user interface */
#define STATISTIC_LABEL_SIZE 128
-static void statistic_label(struct statistic_interface *interface, int i,
- void *key, struct seq_file *seq)
+static void statistic_label(struct statistic_ui *ui, int i, void *key,
+ struct seq_file *seq)
{
- struct statistic_info *info = &interface->info[i];
+ struct statistic_info *info = &ui->info[i];
char *buf;
if (!(info->flags & STATISTIC_FLAGS_LABEL))
@@ -495,13 +494,13 @@ static void statistic_label(struct stati
buf = kzalloc(STATISTIC_LABEL_SIZE, GFP_ATOMIC);
if (!buf)
return;
- interface->label(interface, i, key, buf, STATISTIC_LABEL_SIZE - 1);
+ ui->label(ui, i, key, buf, STATISTIC_LABEL_SIZE - 1);
seq_printf(seq, "%s", buf);
kfree(buf);
}
struct statistic_seq_private {
- struct statistic_interface *interface;
+ struct statistic_ui *ui;
int i;
size_t w_offset;
char *w_buf;
@@ -512,7 +511,7 @@ static void *statistic_seq_traverse(stru
struct statistic_seq_private *seq_priv)
{
*pos += inc;
- if (*pos >= seq_priv->interface->number)
+ if (*pos >= seq_priv->ui->number)
return NULL;
seq_priv->i = *pos;
return seq_priv;
@@ -543,9 +542,9 @@ static char *statistic_state_strings[] =
static int statistic_seq_show_def(struct seq_file *seq, void *_seq_priv)
{
struct statistic_seq_private *seq_priv = _seq_priv;
- struct statistic_interface *interface = seq_priv->interface;
- struct statistic *stat = &interface->stat[seq_priv->i];
- struct statistic_info *info = &interface->info[seq_priv->i];
+ struct statistic_ui *ui = seq_priv->ui;
+ struct statistic *stat = &ui->stat[seq_priv->i];
+ struct statistic_info *info = &ui->info[seq_priv->i];
struct statistic_discipline *disc = &statistic_discs[stat->type];
char t0[TIMESTAMP_SIZE], t1[TIMESTAMP_SIZE], t2[TIMESTAMP_SIZE];
@@ -584,7 +583,7 @@ static int statistic_seq_show_data(struc
struct statistic_discipline *disc = &statistic_discs[stat->type];
if (stat->state >= STATISTIC_STATE_OFF)
- disc->data(stat, seq, seq_priv->interface, seq_priv->i);
+ disc->data(stat, seq, seq_priv->ui, seq_priv->i);
return 0;
}
@@ -611,7 +610,7 @@ static int statistic_open_def(struct ino
seq_priv = kzalloc(sizeof(struct statistic_seq_private), GFP_KERNEL);
if (!seq_priv)
return -ENOMEM;
- seq_priv->interface = inode->i_private;
+ seq_priv->ui = inode->i_private;
retval = seq_open(file, &statistic_seq_ops_def);
if (!retval) {
seq = file->private_data;
@@ -623,14 +622,14 @@ static int statistic_open_def(struct ino
static int statistic_release_def(struct inode *inode, struct file *file)
{
- struct statistic_interface *interface = inode->i_private;
+ struct statistic_ui *ui = inode->i_private;
struct seq_file *seq = file->private_data;
struct statistic_seq_private *seq_priv = seq->private;
char *p, *q = seq_priv->w_buf;
if (seq_priv->w_buf) {
while ((p = strsep(&q, "\n")))
- statistic_parse_line(interface, p);
+ statistic_parse_line(ui, p);
kfree(seq_priv->w_buf);
}
return seq_release_private(inode, file);
@@ -674,31 +673,31 @@ static struct file_operations statistic_
static int statistic_open_data(struct inode *inode, struct file *file)
{
- struct statistic_interface *interface = inode->i_private;
+ struct statistic_ui *ui = inode->i_private;
struct statistic *stat;
struct statistic_discipline *disc;
struct statistic_seq_private *seq_priv;
struct seq_file *seq;
int size, i, j, retval = -ENOMEM;
- if (interface->pull)
- interface->pull(interface);
+ if (ui->pull)
+ ui->pull(ui);
- size = interface->number * sizeof(struct statistic);
+ size = ui->number * sizeof(struct statistic);
seq_priv = kzalloc(sizeof(struct statistic_seq_private), GFP_KERNEL);
if (!seq_priv)
goto failed_priv;
- seq_priv->interface = interface;
+ seq_priv->ui = ui;
seq_priv->stat = stat = kmalloc(size, GFP_KERNEL);
if (!stat)
goto failed_stat;
- memcpy(stat, interface->stat, size);
- for (i = 0; i < interface->number; i++) {
+ memcpy(stat, ui->stat, size);
+ for (i = 0; i < ui->number; i++) {
if (stat[i].state < STATISTIC_STATE_OFF)
continue;
- stat[i].data = statistic_merge(interface, i);
+ stat[i].data = statistic_merge(ui, i);
if (!stat[i].data)
goto failed_merge;
}
@@ -731,12 +730,12 @@ static int statistic_release_data(struct
{
struct seq_file *seq = file->private_data;
struct statistic_seq_private *seq_priv = seq->private;
- struct statistic_interface *interface = seq_priv->interface;
+ struct statistic_ui *ui = seq_priv->ui;
struct statistic *stat = seq_priv->stat;
struct statistic_discipline *disc;
int i;
- for (i = 0; i < interface->number; i++) {
+ for (i = 0; i < ui->number; i++) {
if (stat[i].state < STATISTIC_STATE_OFF)
continue;
disc = &statistic_discs[stat[i].type];
@@ -802,9 +801,9 @@ static void statistic_merge_counter(stru
}
static void statistic_data_counter(struct statistic *stat, struct seq_file *seq,
- struct statistic_interface *interface, int i)
+ struct statistic_ui *ui, int i)
{
- struct statistic_info *info = &interface->info[i];
+ struct statistic_info *info = &ui->info[i];
seq_printf(seq, "%s %Lu\n",
info->name, *(unsigned long long *)stat->data);
@@ -891,9 +890,9 @@ static int statistic_div(signed long lon
}
static void statistic_data_util(struct statistic *stat, struct seq_file *seq,
- struct statistic_interface *interface, int i)
+ struct statistic_ui *ui, int i)
{
- struct statistic_info *info = &interface->info[i];
+ struct statistic_info *info = &ui->info[i];
struct statistic_entry_util *util = stat->data;
unsigned long long mean_w = 0, mean_d = 0, var_w = 0, var_d = 0,
num = util->num, acc = util->acc, sqr = util->sqr;
@@ -1008,20 +1007,18 @@ static void _statistic_data_histogram(st
signed long long bound,
unsigned long long hits,
struct statistic_info *info,
- struct statistic_interface *interface,
- int i)
+ struct statistic_ui *ui, int i)
{
seq_printf(seq, "%s %s%Ld %Lu ", info->name, prefix, bound, hits);
- statistic_label(interface, i, &bound, seq);
+ statistic_label(ui, i, &bound, seq);
seq_printf(seq, "\n");
}
static void statistic_data_histogram(struct statistic *stat,
struct seq_file *seq,
- struct statistic_interface *interface,
- int i)
+ struct statistic_ui *ui, int i)
{
- struct statistic_info *info = &interface->info[i];
+ struct statistic_info *info = &ui->info[i];
int j;
signed long long bound = 0;
unsigned long long hits = 0;
@@ -1029,10 +1026,9 @@ static void statistic_data_histogram(str
for (j = 0; j < (stat->u.histogram.last_index); j++) {
bound = statistic_histogram_calc_value(stat, j);
hits = ((u64*)stat->data)[j];
- _statistic_data_histogram(seq, "<=", bound, hits, info,
- interface, i);
+ _statistic_data_histogram(seq, "<=", bound, hits, info, ui, i);
}
- _statistic_data_histogram(seq, ">", bound, hits, info, interface, i);
+ _statistic_data_histogram(seq, ">", bound, hits, info, ui, i);
}
static void statistic_def_histogram(struct statistic *stat,
@@ -1218,14 +1214,12 @@ static void statistic_merge_sparse(struc
}
static void statistic_data_sparse(struct statistic *stat, struct seq_file *seq,
- struct statistic_interface *interface, int i)
+ struct statistic_ui *ui, int i)
{
- struct statistic_info *info = &interface->info[i];
+ struct statistic_info *info = &ui->info[i];
struct statistic_sparse_list *slist = stat->data;
struct statistic_entry_sparse *entry;
- seq_printf(seq, "%s missed 0x%Lu\n", info->name,
- (unsigned long long)slist->hits_missed);
list_for_each_entry(entry, &slist->entry_lh, list) {
seq_printf(seq, "%s ", info->name);
if (info->flags & _STATISTIC_FLAGS_KEY)
@@ -1234,9 +1228,11 @@ static void statistic_data_sparse(struct
seq_printf(seq, "0x%Lx ",
*(signed long long *)entry->key);
seq_printf(seq, "%Lu ", (unsigned long long)entry->hits);
- statistic_label(interface, i, entry->key, seq);
+ statistic_label(ui, i, entry->key, seq);
seq_printf(seq, "\n");
}
+ seq_printf(seq, "%s other %Lu\n", info->name,
+ (unsigned long long)slist->hits_missed);
}
static void statistic_def_sparse(struct statistic *stat, struct seq_file *seq)
@@ -1337,51 +1333,48 @@ static struct statistic_discipline stati
/**
* statistic_create - setup statistics and create debugfs files
- * @interface: struct statistic_interface provided by client
+ * @ui: struct statistic_ui provided by client
* @name: name of debugfs directory to be created
*
* Creates a debugfs directory in "statistics" as well as the "data" and
* "definition" files. Then we attach setup statistics according to the
- * definition provided by client through struct statistic_interface.
+ * definition provided by client through struct statistic_ui.
*
- * struct statistic_interface must have been set up prior to calling this.
+ * struct statistic_ui must have been set up prior to calling this.
*
* On success, 0 is returned.
*
* If some required memory could not be allocated, or the creation
* of debugfs entries failed, this routine fails, and -ENOMEM is returned.
*/
-int statistic_create(struct statistic_interface *interface, const char *name)
+int statistic_create(struct statistic_ui *ui, const char *name)
{
- struct statistic *stat = interface->stat;
- struct statistic_info *info = interface->info;
+ struct statistic *stat = ui->stat;
+ struct statistic_info *info = ui->info;
int i;
- BUG_ON(!stat || !info || !interface->number);
+ BUG_ON(!stat || !info || !ui->number);
- interface->debugfs_dir =
- debugfs_create_dir(name, statistic_root_dir);
- if (unlikely(!interface->debugfs_dir))
+ ui->dir = debugfs_create_dir(name, statistic_root_dir);
+ if (unlikely(!ui->dir))
return -ENOMEM;
- interface->data_file = debugfs_create_file(
- "data", S_IFREG | S_IRUSR, interface->debugfs_dir,
- (void*)interface, &statistic_data_fops);
- if (unlikely(!interface->data_file)) {
- debugfs_remove(interface->debugfs_dir);
+ ui->data = debugfs_create_file("data", S_IFREG | S_IRUSR, ui->dir,
+ (void*)ui, &statistic_data_fops);
+ if (unlikely(!ui->data)) {
+ debugfs_remove(ui->dir);
return -ENOMEM;
}
- interface->def_file = debugfs_create_file(
- "definition", S_IFREG | S_IRUSR | S_IWUSR,
- interface->debugfs_dir, (void*)interface, &statistic_def_fops);
- if (unlikely(!interface->def_file)) {
- debugfs_remove(interface->data_file);
- debugfs_remove(interface->debugfs_dir);
+ ui->def = debugfs_create_file("definition", S_IFREG | S_IRUSR | S_IWUSR,
+ ui->dir, (void*)ui, &statistic_def_fops);
+ if (unlikely(!ui->def)) {
+ debugfs_remove(ui->data);
+ debugfs_remove(ui->dir);
return -ENOMEM;
}
- for (i = 0; i < interface->number; i++, stat++, info++) {
+ for (i = 0; i < ui->number; i++, stat++, info++) {
if (info->flags & _STATISTIC_FLAGS_KEY)
stat->key_size = info->key_size;
else
@@ -1391,7 +1384,7 @@ int statistic_create(struct statistic_in
}
mutex_lock(&statistic_list_mutex);
- list_add(&interface->list, &statistic_list);
+ list_add(&ui->list, &statistic_list);
mutex_unlock(&statistic_list_mutex);
return 0;
}
@@ -1399,7 +1392,7 @@ EXPORT_SYMBOL_GPL(statistic_create);
/**
* statistic_remove - remove unused statistics
- * @interface: struct statistic_interface to clean up
+ * @ui: struct statistic_ui to clean up
*
* Remove a debugfs directory in "statistics" along with its "data" and
* "definition" files. Removing this user interface also causes the removal
@@ -1409,23 +1402,23 @@ EXPORT_SYMBOL_GPL(statistic_create);
*
* Returns -EINVAL for attempted double removal, 0 otherwise.
*/
-int statistic_remove(struct statistic_interface *interface)
+int statistic_remove(struct statistic_ui *ui)
{
- struct statistic *stat = interface->stat;
- struct statistic_info *info = interface->info;
+ struct statistic *stat = ui->stat;
+ struct statistic_info *info = ui->info;
int i;
- if (unlikely(!interface->debugfs_dir))
+ if (unlikely(!ui->dir))
return -EINVAL;
mutex_lock(&statistic_list_mutex);
- list_del(&interface->list);
+ list_del(&ui->list);
mutex_unlock(&statistic_list_mutex);
- for (i = 0; i < interface->number; i++, stat++, info++)
+ for (i = 0; i < ui->number; i++, stat++, info++)
statistic_transition(stat, info, STATISTIC_STATE_INVALID);
- debugfs_remove(interface->data_file);
- debugfs_remove(interface->def_file);
- debugfs_remove(interface->debugfs_dir);
- interface->debugfs_dir = NULL;
+ debugfs_remove(ui->data);
+ debugfs_remove(ui->def);
+ debugfs_remove(ui->dir);
+ ui->dir = NULL;
return 0;
}
EXPORT_SYMBOL_GPL(statistic_remove);
Index: linux/drivers/s390/scsi/zfcp_def.h
===================================================================
--- linux.orig/drivers/s390/scsi/zfcp_def.h
+++ linux/drivers/s390/scsi/zfcp_def.h
@@ -942,7 +942,7 @@ struct zfcp_adapter {
struct fc_host_statistics *fc_stats;
struct fsf_qtcb_bottom_port *stats_reset_data;
unsigned long stats_reset;
- struct statistic_interface stat_if;
+ struct statistic_ui stat_if;
struct statistic stat[_ZFCP_STAT_A_NUMBER];
};
@@ -1006,7 +1006,7 @@ struct zfcp_unit {
all scsi_scan_target
requests have been
completed. */
- struct statistic_interface stat_if;
+ struct statistic_ui stat_if;
struct statistic stat[_ZFCP_STAT_U_NUMBER];
};
-
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