*
*/
+#define KMSG_COMPONENT "dasd"
+
#include <linux/ctype.h>
+#include <linux/string.h>
#include <linux/seq_file.h>
#include <linux/vmalloc.h>
#include <linux/proc_fs.h>
/* Print device number. */
seq_printf(m, "%s", dev_name(&device->cdev->dev));
/* Print discipline string. */
- if (device != NULL && device->discipline != NULL)
+ if (device->discipline != NULL)
seq_printf(m, "(%s)", device->discipline->name);
else
seq_printf(m, "(none)");
substr = (device->features & DASD_FEATURE_READONLY) ? "(ro)" : " ";
seq_printf(m, "%4s: ", substr);
/* Print device status information. */
- switch ((device != NULL) ? device->state : -1) {
- case -1:
- seq_printf(m, "unknown");
- break;
+ switch (device->state) {
case DASD_STATE_NEW:
seq_printf(m, "new");
break;
seq_printf(m, "n/f ");
else
seq_printf(m,
- "at blocksize: %d, %ld blocks, %ld MB",
+ "at blocksize: %d, %lld blocks, %lld MB",
block->bp_block, block->blocks,
((block->bp_block >> 9) *
block->blocks) >> 11);
.release = seq_release,
};
-static int
-dasd_calc_metrics(char *page, char **start, off_t off,
- int count, int *eof, int len)
-{
- len = (len > off) ? len - off : 0;
- if (len > count)
- len = count;
- if (len < count)
- *eof = 1;
- *start = page + off;
- return len;
-}
-
#ifdef CONFIG_DASD_PROFILE
-static char *
-dasd_statistics_array(char *str, unsigned int *array, int factor)
+static void dasd_statistics_array(struct seq_file *m, unsigned int *array, int factor)
{
int i;
for (i = 0; i < 32; i++) {
- str += sprintf(str, "%7d ", array[i] / factor);
+ seq_printf(m, "%7d ", array[i] / factor);
if (i == 15)
- str += sprintf(str, "\n");
+ seq_putc(m, '\n');
}
- str += sprintf(str,"\n");
- return str;
+ seq_putc(m, '\n');
}
#endif /* CONFIG_DASD_PROFILE */
-static int
-dasd_statistics_read(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+static int dasd_stats_proc_show(struct seq_file *m, void *v)
{
- unsigned long len;
#ifdef CONFIG_DASD_PROFILE
struct dasd_profile_info_t *prof;
- char *str;
int factor;
/* check for active profiling */
if (dasd_profile_level == DASD_PROFILE_OFF) {
- len = sprintf(page, "Statistics are off - they might be "
+ seq_printf(m, "Statistics are off - they might be "
"switched on using 'echo set on > "
"/proc/dasd/statistics'\n");
- return dasd_calc_metrics(page, start, off, count, eof, len);
+ return 0;
}
prof = &dasd_global_profile;
- /* prevent couter 'overflow' on output */
+ /* prevent counter 'overflow' on output */
for (factor = 1; (prof->dasd_io_reqs / factor) > 9999999;
factor *= 10);
- str = page;
- str += sprintf(str, "%d dasd I/O requests\n", prof->dasd_io_reqs);
- str += sprintf(str, "with %u sectors(512B each)\n",
+ 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);
- str += sprintf(str, "Scale Factor is %d\n", factor);
- str += sprintf(str,
+ 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");
- str += sprintf(str,
+ seq_printf(m,
" _256 _512 __1M __2M __4M __8M "
" _16M _32M _64M 128M 256M 512M "
" __1G __2G __4G " " _>4G\n");
- str += sprintf(str, "Histogram of sizes (512B secs)\n");
- str = dasd_statistics_array(str, prof->dasd_io_secs, factor);
- str += sprintf(str, "Histogram of I/O times (microseconds)\n");
- str = dasd_statistics_array(str, prof->dasd_io_times, factor);
- str += sprintf(str, "Histogram of I/O times per sector\n");
- str = dasd_statistics_array(str, prof->dasd_io_timps, factor);
- str += sprintf(str, "Histogram of I/O time till ssch\n");
- str = dasd_statistics_array(str, prof->dasd_io_time1, factor);
- str += sprintf(str, "Histogram of I/O time between ssch and irq\n");
- str = dasd_statistics_array(str, prof->dasd_io_time2, factor);
- str += sprintf(str, "Histogram of I/O time between ssch "
+ 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");
- str = dasd_statistics_array(str, prof->dasd_io_time2ps, factor);
- str += sprintf(str, "Histogram of I/O time between irq and end\n");
- str = dasd_statistics_array(str, prof->dasd_io_time3, factor);
- str += sprintf(str, "# of req in chanq at enqueuing (1..32) \n");
- str = dasd_statistics_array(str, prof->dasd_io_nr_req, factor);
- len = str - page;
+ 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);
#else
- len = sprintf(page, "Statistics are not activated in this kernel\n");
+ seq_printf(m, "Statistics are not activated in this kernel\n");
#endif
- return dasd_calc_metrics(page, start, off, count, eof, len);
+ return 0;
}
-static int
-dasd_statistics_write(struct file *file, const char __user *user_buf,
- unsigned long user_len, void *data)
+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;
buffer = dasd_get_user_string(user_buf, user_len);
if (IS_ERR(buffer))
return PTR_ERR(buffer);
- MESSAGE_LOG(KERN_INFO, "/proc/dasd/statictics: '%s'", buffer);
+ DBF_EVENT(DBF_DEBUG, "/proc/dasd/statictics: '%s'\n", buffer);
/* check for valid verbs */
- for (str = buffer; isspace(*str); str++);
+ str = skip_spaces(buffer);
if (strncmp(str, "set", 3) == 0 && isspace(str[3])) {
/* 'set xxx' was given */
- for (str = str + 4; isspace(*str); str++);
+ str = skip_spaces(str + 4);
if (strcmp(str, "on") == 0) {
/* switch on statistics profiling */
dasd_profile_level = DASD_PROFILE_ON;
- MESSAGE(KERN_INFO, "%s", "Statistics switched on");
+ pr_info("The statistics feature has been switched "
+ "on\n");
} else if (strcmp(str, "off") == 0) {
/* switch off and reset statistics profiling */
memset(&dasd_global_profile,
0, sizeof (struct dasd_profile_info_t));
dasd_profile_level = DASD_PROFILE_OFF;
- MESSAGE(KERN_INFO, "%s", "Statistics switched off");
+ pr_info("The statistics feature has been switched "
+ "off\n");
} else
goto out_error;
} else if (strncmp(str, "reset", 5) == 0) {
/* reset the statistics */
memset(&dasd_global_profile, 0,
sizeof (struct dasd_profile_info_t));
- MESSAGE(KERN_INFO, "%s", "Statistics reset");
+ pr_info("The statistics have been reset\n");
} else
goto out_error;
kfree(buffer);
return user_len;
out_error:
- MESSAGE(KERN_WARNING, "%s",
- "/proc/dasd/statistics: only 'set on', 'set off' "
- "and 'reset' are supported verbs");
+ pr_warning("%s is not a supported value for /proc/dasd/statistics\n",
+ str);
kfree(buffer);
return -EINVAL;
#else
- MESSAGE(KERN_WARNING, "%s",
- "/proc/dasd/statistics: is not activated in this kernel");
+ 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.
dasd_proc_root_entry = proc_mkdir("dasd", NULL);
if (!dasd_proc_root_entry)
goto out_nodasd;
- dasd_proc_root_entry->owner = THIS_MODULE;
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 = create_proc_entry("statistics",
- S_IFREG | S_IRUGO | S_IWUSR,
- dasd_proc_root_entry);
+ 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;
- dasd_statistics_entry->read_proc = dasd_statistics_read;
- dasd_statistics_entry->write_proc = dasd_statistics_write;
- dasd_statistics_entry->owner = THIS_MODULE;
return 0;
out_nostatistics:
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff