From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/s390/block/dasd_proc.c | 383 ++++++++++++++++++++++++++++++++++ 1 file changed, 383 insertions(+) create mode 100644 kernel/drivers/s390/block/dasd_proc.c (limited to 'kernel/drivers/s390/block/dasd_proc.c') diff --git a/kernel/drivers/s390/block/dasd_proc.c b/kernel/drivers/s390/block/dasd_proc.c new file mode 100644 index 000000000..aa7bb2d1d --- /dev/null +++ b/kernel/drivers/s390/block/dasd_proc.c @@ -0,0 +1,383 @@ +/* + * Author(s)......: Holger Smolinski + * Horst Hummel + * Carsten Otte + * Martin Schwidefsky + * Bugreports.to..: + * Coypright IBM Corp. 1999, 2002 + * + * /proc interface for the dasd driver. + * + */ + +#define KMSG_COMPONENT "dasd" + +#include +#include +#include +#include +#include +#include + +#include +#include + +/* This is ugly... */ +#define PRINTK_HEADER "dasd_proc:" + +#include "dasd_int.h" + +static struct proc_dir_entry *dasd_proc_root_entry = NULL; +static struct proc_dir_entry *dasd_devices_entry = NULL; +static struct proc_dir_entry *dasd_statistics_entry = NULL; + +static int +dasd_devices_show(struct seq_file *m, void *v) +{ + struct dasd_device *device; + struct dasd_block *block; + char *substr; + + device = dasd_device_from_devindex((unsigned long) v - 1); + if (IS_ERR(device)) + return 0; + if (device->block) + block = device->block; + else { + dasd_put_device(device); + return 0; + } + /* Print device number. */ + seq_printf(m, "%s", dev_name(&device->cdev->dev)); + /* Print discipline string. */ + if (device->discipline != NULL) + seq_printf(m, "(%s)", device->discipline->name); + else + seq_printf(m, "(none)"); + /* Print kdev. */ + if (block->gdp) + seq_printf(m, " at (%3d:%6d)", + MAJOR(disk_devt(block->gdp)), + MINOR(disk_devt(block->gdp))); + else + seq_printf(m, " at (???:??????)"); + /* Print device name. */ + if (block->gdp) + seq_printf(m, " is %-8s", block->gdp->disk_name); + else + seq_printf(m, " is ????????"); + /* Print devices features. */ + substr = (device->features & DASD_FEATURE_READONLY) ? "(ro)" : " "; + seq_printf(m, "%4s: ", substr); + /* Print device status information. */ + switch (device->state) { + case DASD_STATE_NEW: + seq_printf(m, "new"); + break; + case DASD_STATE_KNOWN: + seq_printf(m, "detected"); + break; + case DASD_STATE_BASIC: + seq_printf(m, "basic"); + break; + case DASD_STATE_UNFMT: + seq_printf(m, "unformatted"); + break; + case DASD_STATE_READY: + case DASD_STATE_ONLINE: + seq_printf(m, "active "); + if (dasd_check_blocksize(block->bp_block)) + seq_printf(m, "n/f "); + else + seq_printf(m, + "at blocksize: %d, %lld blocks, %lld MB", + block->bp_block, block->blocks, + ((block->bp_block >> 9) * + block->blocks) >> 11); + break; + default: + seq_printf(m, "no stat"); + break; + } + dasd_put_device(device); + if (dasd_probeonly) + seq_printf(m, "(probeonly)"); + seq_printf(m, "\n"); + return 0; +} + +static void *dasd_devices_start(struct seq_file *m, loff_t *pos) +{ + if (*pos >= dasd_max_devindex) + return NULL; + return (void *)((unsigned long) *pos + 1); +} + +static void *dasd_devices_next(struct seq_file *m, void *v, loff_t *pos) +{ + ++*pos; + return dasd_devices_start(m, pos); +} + +static void dasd_devices_stop(struct seq_file *m, void *v) +{ +} + +static const struct seq_operations dasd_devices_seq_ops = { + .start = dasd_devices_start, + .next = dasd_devices_next, + .stop = dasd_devices_stop, + .show = dasd_devices_show, +}; + +static int dasd_devices_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &dasd_devices_seq_ops); +} + +static const struct file_operations dasd_devices_file_ops = { + .owner = THIS_MODULE, + .open = dasd_devices_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +#ifdef CONFIG_DASD_PROFILE +static int dasd_stats_all_block_on(void) +{ + int i, rc; + struct dasd_device *device; + + rc = 0; + for (i = 0; i < dasd_max_devindex; ++i) { + device = dasd_device_from_devindex(i); + if (IS_ERR(device)) + continue; + if (device->block) + rc = dasd_profile_on(&device->block->profile); + dasd_put_device(device); + if (rc) + return rc; + } + return 0; +} + +static void dasd_stats_all_block_off(void) +{ + int i; + struct dasd_device *device; + + for (i = 0; i < dasd_max_devindex; ++i) { + device = dasd_device_from_devindex(i); + if (IS_ERR(device)) + continue; + if (device->block) + dasd_profile_off(&device->block->profile); + dasd_put_device(device); + } +} + +static void dasd_stats_all_block_reset(void) +{ + int i; + struct dasd_device *device; + + for (i = 0; i < dasd_max_devindex; ++i) { + device = dasd_device_from_devindex(i); + if (IS_ERR(device)) + continue; + if (device->block) + dasd_profile_reset(&device->block->profile); + dasd_put_device(device); + } +} + +static void dasd_statistics_array(struct seq_file *m, unsigned int *array, int factor) +{ + int i; + + for (i = 0; i < 32; i++) { + seq_printf(m, "%7d ", array[i] / factor); + if (i == 15) + seq_putc(m, '\n'); + } + seq_putc(m, '\n'); +} +#endif /* CONFIG_DASD_PROFILE */ + +static int dasd_stats_proc_show(struct seq_file *m, void *v) +{ +#ifdef CONFIG_DASD_PROFILE + struct dasd_profile_info *prof; + int factor; + + spin_lock_bh(&dasd_global_profile.lock); + prof = dasd_global_profile.data; + if (!prof) { + spin_unlock_bh(&dasd_global_profile.lock); + seq_printf(m, "Statistics are off - they might be " + "switched on using 'echo set on > " + "/proc/dasd/statistics'\n"); + return 0; + } + + /* prevent counter 'overflow' on output */ + for (factor = 1; (prof->dasd_io_reqs / factor) > 9999999; + factor *= 10); + + seq_printf(m, "%d dasd I/O requests\n", prof->dasd_io_reqs); + seq_printf(m, "with %u sectors(512B each)\n", + prof->dasd_io_sects); + seq_printf(m, "Scale Factor is %d\n", factor); + seq_printf(m, + " __<4 ___8 __16 __32 __64 _128 " + " _256 _512 __1k __2k __4k __8k " + " _16k _32k _64k 128k\n"); + seq_printf(m, + " _256 _512 __1M __2M __4M __8M " + " _16M _32M _64M 128M 256M 512M " + " __1G __2G __4G " " _>4G\n"); + + seq_printf(m, "Histogram of sizes (512B secs)\n"); + dasd_statistics_array(m, prof->dasd_io_secs, factor); + seq_printf(m, "Histogram of I/O times (microseconds)\n"); + dasd_statistics_array(m, prof->dasd_io_times, factor); + seq_printf(m, "Histogram of I/O times per sector\n"); + dasd_statistics_array(m, prof->dasd_io_timps, factor); + seq_printf(m, "Histogram of I/O time till ssch\n"); + dasd_statistics_array(m, prof->dasd_io_time1, factor); + seq_printf(m, "Histogram of I/O time between ssch and irq\n"); + dasd_statistics_array(m, prof->dasd_io_time2, factor); + seq_printf(m, "Histogram of I/O time between ssch " + "and irq per sector\n"); + dasd_statistics_array(m, prof->dasd_io_time2ps, factor); + seq_printf(m, "Histogram of I/O time between irq and end\n"); + dasd_statistics_array(m, prof->dasd_io_time3, factor); + seq_printf(m, "# of req in chanq at enqueuing (1..32) \n"); + dasd_statistics_array(m, prof->dasd_io_nr_req, factor); + spin_unlock_bh(&dasd_global_profile.lock); +#else + seq_printf(m, "Statistics are not activated in this kernel\n"); +#endif + return 0; +} + +static int dasd_stats_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, dasd_stats_proc_show, NULL); +} + +static ssize_t dasd_stats_proc_write(struct file *file, + const char __user *user_buf, size_t user_len, loff_t *pos) +{ +#ifdef CONFIG_DASD_PROFILE + char *buffer, *str; + int rc; + + if (user_len > 65536) + user_len = 65536; + buffer = dasd_get_user_string(user_buf, user_len); + if (IS_ERR(buffer)) + return PTR_ERR(buffer); + + /* check for valid verbs */ + str = skip_spaces(buffer); + if (strncmp(str, "set", 3) == 0 && isspace(str[3])) { + /* 'set xxx' was given */ + str = skip_spaces(str + 4); + if (strcmp(str, "on") == 0) { + /* switch on statistics profiling */ + rc = dasd_stats_all_block_on(); + if (rc) { + dasd_stats_all_block_off(); + goto out_error; + } + rc = dasd_profile_on(&dasd_global_profile); + if (rc) { + dasd_stats_all_block_off(); + goto out_error; + } + dasd_profile_reset(&dasd_global_profile); + dasd_global_profile_level = DASD_PROFILE_ON; + pr_info("The statistics feature has been switched " + "on\n"); + } else if (strcmp(str, "off") == 0) { + /* switch off statistics profiling */ + dasd_global_profile_level = DASD_PROFILE_OFF; + dasd_profile_off(&dasd_global_profile); + dasd_stats_all_block_off(); + pr_info("The statistics feature has been switched " + "off\n"); + } else + goto out_parse_error; + } else if (strncmp(str, "reset", 5) == 0) { + /* reset the statistics */ + dasd_profile_reset(&dasd_global_profile); + dasd_stats_all_block_reset(); + pr_info("The statistics have been reset\n"); + } else + goto out_parse_error; + vfree(buffer); + return user_len; +out_parse_error: + rc = -EINVAL; + pr_warning("%s is not a supported value for /proc/dasd/statistics\n", + str); +out_error: + vfree(buffer); + return rc; +#else + pr_warning("/proc/dasd/statistics: is not activated in this kernel\n"); + return user_len; +#endif /* CONFIG_DASD_PROFILE */ +} + +static const struct file_operations dasd_stats_proc_fops = { + .owner = THIS_MODULE, + .open = dasd_stats_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = dasd_stats_proc_write, +}; + +/* + * Create dasd proc-fs entries. + * In case creation failed, cleanup and return -ENOENT. + */ +int +dasd_proc_init(void) +{ + dasd_proc_root_entry = proc_mkdir("dasd", NULL); + if (!dasd_proc_root_entry) + goto out_nodasd; + dasd_devices_entry = proc_create("devices", + S_IFREG | S_IRUGO | S_IWUSR, + dasd_proc_root_entry, + &dasd_devices_file_ops); + if (!dasd_devices_entry) + goto out_nodevices; + dasd_statistics_entry = proc_create("statistics", + S_IFREG | S_IRUGO | S_IWUSR, + dasd_proc_root_entry, + &dasd_stats_proc_fops); + if (!dasd_statistics_entry) + goto out_nostatistics; + return 0; + + out_nostatistics: + remove_proc_entry("devices", dasd_proc_root_entry); + out_nodevices: + remove_proc_entry("dasd", NULL); + out_nodasd: + return -ENOENT; +} + +void +dasd_proc_exit(void) +{ + remove_proc_entry("devices", dasd_proc_root_entry); + remove_proc_entry("statistics", dasd_proc_root_entry); + remove_proc_entry("dasd", NULL); +} -- cgit 1.2.3-korg