Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *		    Horst Hummel <Horst.Hummel@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *		    Carsten Otte <Cotte@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *		    Martin Schwidefsky <schwidefsky@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Bugreports.to..: <Linux390@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Copyright IBM Corp. 1999, 2002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * /proc interface for the dasd driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #define KMSG_COMPONENT "dasd"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <asm/debug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) /* This is ugly... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define PRINTK_HEADER "dasd_proc:"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include "dasd_int.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) static struct proc_dir_entry *dasd_proc_root_entry = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) static struct proc_dir_entry *dasd_devices_entry = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) static struct proc_dir_entry *dasd_statistics_entry = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) dasd_devices_show(struct seq_file *m, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	struct dasd_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	struct dasd_block *block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	char *substr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	device = dasd_device_from_devindex((unsigned long) v - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	if (IS_ERR(device))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	if (device->block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		block = device->block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		dasd_put_device(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	/* Print device number. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	seq_printf(m, "%s", dev_name(&device->cdev->dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	/* Print discipline string. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	if (device->discipline != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		seq_printf(m, "(%s)", device->discipline->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		seq_printf(m, "(none)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	/* Print kdev. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	if (block->gdp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		seq_printf(m, " at (%3d:%6d)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 			   MAJOR(disk_devt(block->gdp)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 			   MINOR(disk_devt(block->gdp)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		seq_printf(m, "  at (???:??????)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	/* Print device name. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	if (block->gdp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		seq_printf(m, " is %-8s", block->gdp->disk_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		seq_printf(m, " is ????????");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	/* Print devices features. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	substr = (device->features & DASD_FEATURE_READONLY) ? "(ro)" : " ";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	seq_printf(m, "%4s: ", substr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	/* Print device status information. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	switch (device->state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	case DASD_STATE_NEW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		seq_printf(m, "new");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	case DASD_STATE_KNOWN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		seq_printf(m, "detected");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	case DASD_STATE_BASIC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		seq_printf(m, "basic");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	case DASD_STATE_UNFMT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		seq_printf(m, "unformatted");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	case DASD_STATE_READY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	case DASD_STATE_ONLINE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		seq_printf(m, "active ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		if (dasd_check_blocksize(block->bp_block))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 			seq_printf(m, "n/f	 ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 			seq_printf(m,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 				   "at blocksize: %u, %lu blocks, %lu MB",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 				   block->bp_block, block->blocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 				   ((block->bp_block >> 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 				    block->blocks) >> 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		seq_printf(m, "no stat");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	dasd_put_device(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	if (dasd_probeonly)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		seq_printf(m, "(probeonly)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	seq_printf(m, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static void *dasd_devices_start(struct seq_file *m, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	if (*pos >= dasd_max_devindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	return (void *)((unsigned long) *pos + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static void *dasd_devices_next(struct seq_file *m, void *v, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	++*pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	return dasd_devices_start(m, pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static void dasd_devices_stop(struct seq_file *m, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static const struct seq_operations dasd_devices_seq_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	.start		= dasd_devices_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	.next		= dasd_devices_next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	.stop		= dasd_devices_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	.show		= dasd_devices_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #ifdef CONFIG_DASD_PROFILE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static int dasd_stats_all_block_on(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	int i, rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	struct dasd_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	for (i = 0; i < dasd_max_devindex; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		device = dasd_device_from_devindex(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		if (IS_ERR(device))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		if (device->block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 			rc = dasd_profile_on(&device->block->profile);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		dasd_put_device(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 			return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) static void dasd_stats_all_block_off(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	struct dasd_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	for (i = 0; i < dasd_max_devindex; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		device = dasd_device_from_devindex(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		if (IS_ERR(device))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		if (device->block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 			dasd_profile_off(&device->block->profile);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		dasd_put_device(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static void dasd_stats_all_block_reset(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	struct dasd_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	for (i = 0; i < dasd_max_devindex; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		device = dasd_device_from_devindex(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		if (IS_ERR(device))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		if (device->block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 			dasd_profile_reset(&device->block->profile);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		dasd_put_device(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static void dasd_statistics_array(struct seq_file *m, unsigned int *array, int factor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	for (i = 0; i < 32; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		seq_printf(m, "%7d ", array[i] / factor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		if (i == 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 			seq_putc(m, '\n');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	seq_putc(m, '\n');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) #endif /* CONFIG_DASD_PROFILE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static int dasd_stats_proc_show(struct seq_file *m, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) #ifdef CONFIG_DASD_PROFILE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	struct dasd_profile_info *prof;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	int factor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	spin_lock_bh(&dasd_global_profile.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	prof = dasd_global_profile.data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	if (!prof) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		spin_unlock_bh(&dasd_global_profile.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		seq_printf(m, "Statistics are off - they might be "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 				    "switched on using 'echo set on > "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 				    "/proc/dasd/statistics'\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	/* prevent counter 'overflow' on output */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	for (factor = 1; (prof->dasd_io_reqs / factor) > 9999999;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	     factor *= 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	seq_printf(m, "%d dasd I/O requests\n", prof->dasd_io_reqs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	seq_printf(m, "with %u sectors(512B each)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		       prof->dasd_io_sects);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	seq_printf(m, "Scale Factor is  %d\n", factor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	seq_printf(m,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		       "   __<4	   ___8	   __16	   __32	   __64	   _128	"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		       "   _256	   _512	   __1k	   __2k	   __4k	   __8k	"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		       "   _16k	   _32k	   _64k	   128k\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	seq_printf(m,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		       "   _256	   _512	   __1M	   __2M	   __4M	   __8M	"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		       "   _16M	   _32M	   _64M	   128M	   256M	   512M	"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		       "   __1G	   __2G	   __4G " "   _>4G\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	seq_printf(m, "Histogram of sizes (512B secs)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	dasd_statistics_array(m, prof->dasd_io_secs, factor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	seq_printf(m, "Histogram of I/O times (microseconds)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	dasd_statistics_array(m, prof->dasd_io_times, factor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	seq_printf(m, "Histogram of I/O times per sector\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	dasd_statistics_array(m, prof->dasd_io_timps, factor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	seq_printf(m, "Histogram of I/O time till ssch\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	dasd_statistics_array(m, prof->dasd_io_time1, factor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	seq_printf(m, "Histogram of I/O time between ssch and irq\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	dasd_statistics_array(m, prof->dasd_io_time2, factor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	seq_printf(m, "Histogram of I/O time between ssch "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 			    "and irq per sector\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	dasd_statistics_array(m, prof->dasd_io_time2ps, factor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	seq_printf(m, "Histogram of I/O time between irq and end\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	dasd_statistics_array(m, prof->dasd_io_time3, factor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	seq_printf(m, "# of req in chanq at enqueuing (1..32) \n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	dasd_statistics_array(m, prof->dasd_io_nr_req, factor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	spin_unlock_bh(&dasd_global_profile.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	seq_printf(m, "Statistics are not activated in this kernel\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) static int dasd_stats_proc_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	return single_open(file, dasd_stats_proc_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) static ssize_t dasd_stats_proc_write(struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		const char __user *user_buf, size_t user_len, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) #ifdef CONFIG_DASD_PROFILE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	char *buffer, *str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	if (user_len > 65536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		user_len = 65536;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	buffer = dasd_get_user_string(user_buf, user_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	if (IS_ERR(buffer))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		return PTR_ERR(buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	/* check for valid verbs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	str = skip_spaces(buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	if (strncmp(str, "set", 3) == 0 && isspace(str[3])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		/* 'set xxx' was given */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		str = skip_spaces(str + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		if (strcmp(str, "on") == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 			/* switch on statistics profiling */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 			rc = dasd_stats_all_block_on();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 			if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 				dasd_stats_all_block_off();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 				goto out_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 			rc = dasd_profile_on(&dasd_global_profile);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 			if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 				dasd_stats_all_block_off();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 				goto out_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 			dasd_profile_reset(&dasd_global_profile);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 			dasd_global_profile_level = DASD_PROFILE_ON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 			pr_info("The statistics feature has been switched "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 				"on\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		} else if (strcmp(str, "off") == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 			/* switch off statistics profiling */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 			dasd_global_profile_level = DASD_PROFILE_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 			dasd_profile_off(&dasd_global_profile);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 			dasd_stats_all_block_off();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 			pr_info("The statistics feature has been switched "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 				"off\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 			goto out_parse_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	} else if (strncmp(str, "reset", 5) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 		/* reset the statistics */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		dasd_profile_reset(&dasd_global_profile);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 		dasd_stats_all_block_reset();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		pr_info("The statistics have been reset\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		goto out_parse_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	vfree(buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	return user_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) out_parse_error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	pr_warn("%s is not a supported value for /proc/dasd/statistics\n", str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) out_error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	vfree(buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	pr_warn("/proc/dasd/statistics: is not activated in this kernel\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	return user_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) #endif				/* CONFIG_DASD_PROFILE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) static const struct proc_ops dasd_stats_proc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	.proc_open	= dasd_stats_proc_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	.proc_read	= seq_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	.proc_lseek	= seq_lseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	.proc_release	= single_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	.proc_write	= dasd_stats_proc_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)  * Create dasd proc-fs entries.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)  * In case creation failed, cleanup and return -ENOENT.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) dasd_proc_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	dasd_proc_root_entry = proc_mkdir("dasd", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	if (!dasd_proc_root_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 		goto out_nodasd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	dasd_devices_entry = proc_create_seq("devices", 0444,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 					 dasd_proc_root_entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 					 &dasd_devices_seq_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	if (!dasd_devices_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 		goto out_nodevices;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	dasd_statistics_entry = proc_create("statistics",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 					    S_IFREG | S_IRUGO | S_IWUSR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 					    dasd_proc_root_entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 					    &dasd_stats_proc_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	if (!dasd_statistics_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 		goto out_nostatistics;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)  out_nostatistics:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	remove_proc_entry("devices", dasd_proc_root_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)  out_nodevices:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	remove_proc_entry("dasd", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)  out_nodasd:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) dasd_proc_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	remove_proc_entry("devices", dasd_proc_root_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	remove_proc_entry("statistics", dasd_proc_root_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	remove_proc_entry("dasd", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) }