Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 319 insertions, 0 deletions

diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c
new file mode 100644
index 0000000..353d411
--- /dev/null
+++ b/drivers/s390/block/dasd_proc.c
@@ -0,0 +1,319 @@
+/*
+ * File...........: linux/drivers/s390/block/dasd_proc.c
+ * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
+ *		    Horst Hummel <Horst.Hummel@de.ibm.com>
+ *		    Carsten Otte <Cotte@de.ibm.com>
+ *		    Martin Schwidefsky <schwidefsky@de.ibm.com>
+ * Bugreports.to..: <Linux390@de.ibm.com>
+ * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999-2002
+ *
+ * /proc interface for the dasd driver.
+ *
+ * $Revision: 1.30 $
+ */
+
+#include <linux/config.h>
+#include <linux/ctype.h>
+#include <linux/seq_file.h>
+#include <linux/vmalloc.h>
+
+#include <asm/debug.h>
+#include <asm/uaccess.h>
+
+/* 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 inline char *
+dasd_get_user_string(const char __user *user_buf, size_t user_len)
+{
+	char *buffer;
+
+	buffer = kmalloc(user_len + 1, GFP_KERNEL);
+	if (buffer == NULL)
+		return ERR_PTR(-ENOMEM);
+	if (copy_from_user(buffer, user_buf, user_len) != 0) {
+		kfree(buffer);
+		return ERR_PTR(-EFAULT);
+	}
+	/* got the string, now strip linefeed. */
+	if (buffer[user_len - 1] == '\n')
+		buffer[user_len - 1] = 0;
+	else
+		buffer[user_len] = 0;
+	return buffer;
+}
+
+static int
+dasd_devices_show(struct seq_file *m, void *v)
+{
+	struct dasd_device *device;
+	char *substr;
+
+	device = dasd_device_from_devindex((unsigned long) v - 1);
+	if (IS_ERR(device))
+		return 0;
+	/* Print device number. */
+	seq_printf(m, "%s", device->cdev->dev.bus_id);
+	/* Print discipline string. */
+	if (device != NULL && device->discipline != NULL)
+		seq_printf(m, "(%s)", device->discipline->name);
+	else
+		seq_printf(m, "(none)");
+	/* Print kdev. */
+	if (device->gdp)
+		seq_printf(m, " at (%3d:%6d)",
+			   device->gdp->major, device->gdp->first_minor);
+	else
+		seq_printf(m, "  at (???:??????)");
+	/* Print device name. */
+	if (device->gdp)
+		seq_printf(m, " is %-8s", device->gdp->disk_name);
+	else
+		seq_printf(m, " is ????????");
+	/* Print devices features. */
+	substr = test_bit(DASD_FLAG_RO, &device->flags) ? "(ro)" : " ";
+	seq_printf(m, "%4s: ", substr);
+	/* Print device status information. */
+	switch ((device != NULL) ? device->state : -1) {
+	case -1:
+		seq_printf(m, "unknown");
+		break;
+	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_READY:
+	case DASD_STATE_ONLINE:
+		seq_printf(m, "active ");
+		if (dasd_check_blocksize(device->bp_block))
+			seq_printf(m, "n/f	 ");
+		else
+			seq_printf(m,
+				   "at blocksize: %d, %ld blocks, %ld MB",
+				   device->bp_block, device->blocks,
+				   ((device->bp_block >> 9) *
+				    device->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 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 struct file_operations dasd_devices_file_ops = {
+	.open		= dasd_devices_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
+static inline 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;
+}
+
+static inline char *
+dasd_statistics_array(char *str, int *array, int shift)
+{
+	int i;
+
+	for (i = 0; i < 32; i++) {
+		str += sprintf(str, "%7d ", array[i] >> shift);
+		if (i == 15)
+			str += sprintf(str, "\n");
+	}
+	str += sprintf(str,"\n");
+	return str;
+}
+
+static int
+dasd_statistics_read(char *page, char **start, off_t off,
+		     int count, int *eof, void *data)
+{
+	unsigned long len;
+#ifdef CONFIG_DASD_PROFILE
+	struct dasd_profile_info_t *prof;
+	char *str;
+	int shift;
+
+	/* check for active profiling */
+	if (dasd_profile_level == DASD_PROFILE_OFF) {
+		len = sprintf(page, "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);
+	}
+
+	prof = &dasd_global_profile;
+	/* prevent couter 'overflow' on output */
+	for (shift = 0; (prof->dasd_io_reqs >> shift) > 9999999; shift++);
+
+	str = page;
+	str += sprintf(str, "%d dasd I/O requests\n", prof->dasd_io_reqs);
+	str += sprintf(str, "with %d sectors(512B each)\n",
+		       prof->dasd_io_sects);
+	str += sprintf(str,
+		       "   __<4	   ___8	   __16	   __32	   __64	   _128	"
+		       "   _256	   _512	   __1k	   __2k	   __4k	   __8k	"
+		       "   _16k	   _32k	   _64k	   128k\n");
+	str += sprintf(str,
+		       "   _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, shift);
+	str += sprintf(str, "Histogram of I/O times (microseconds)\n");
+	str = dasd_statistics_array(str, prof->dasd_io_times, shift);
+	str += sprintf(str, "Histogram of I/O times per sector\n");
+	str = dasd_statistics_array(str, prof->dasd_io_timps, shift);
+	str += sprintf(str, "Histogram of I/O time till ssch\n");
+	str = dasd_statistics_array(str, prof->dasd_io_time1, shift);
+	str += sprintf(str, "Histogram of I/O time between ssch and irq\n");
+	str = dasd_statistics_array(str, prof->dasd_io_time2, shift);
+	str += sprintf(str, "Histogram of I/O time between ssch "
+			    "and irq per sector\n");
+	str = dasd_statistics_array(str, prof->dasd_io_time2ps, shift);
+	str += sprintf(str, "Histogram of I/O time between irq and end\n");
+	str = dasd_statistics_array(str, prof->dasd_io_time3, shift);
+	str += sprintf(str, "# of req in chanq at enqueuing (1..32) \n");
+	str = dasd_statistics_array(str, prof->dasd_io_nr_req, shift);
+	len = str - page;
+#else
+	len = sprintf(page, "Statistics are not activated in this kernel\n");
+#endif
+	return dasd_calc_metrics(page, start, off, count, eof, len);
+}
+
+static int
+dasd_statistics_write(struct file *file, const char __user *user_buf,
+		      unsigned long user_len, void *data)
+{
+#ifdef CONFIG_DASD_PROFILE
+	char *buffer, *str;
+
+	if (user_len > 65536)
+		user_len = 65536;
+	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);
+
+	/* check for valid verbs */
+	for (str = buffer; isspace(*str); str++);
+	if (strncmp(str, "set", 3) == 0 && isspace(str[3])) {
+		/* 'set xxx' was given */
+		for (str = str + 4; isspace(*str); str++);
+		if (strcmp(str, "on") == 0) {
+			/* switch on statistics profiling */
+			dasd_profile_level = DASD_PROFILE_ON;
+			MESSAGE(KERN_INFO, "%s", "Statistics switched on");
+		} 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");
+		} 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");
+	} 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");
+	kfree(buffer);
+	return -EINVAL;
+#else
+	MESSAGE(KERN_WARNING, "%s",
+		"/proc/dasd/statistics: is not activated in this kernel");
+	return user_len;
+#endif				/* CONFIG_DASD_PROFILE */
+}
+
+int
+dasd_proc_init(void)
+{
+	dasd_proc_root_entry = proc_mkdir("dasd", &proc_root);
+	dasd_proc_root_entry->owner = THIS_MODULE;
+	dasd_devices_entry = create_proc_entry("devices",
+					       S_IFREG | S_IRUGO | S_IWUSR,
+					       dasd_proc_root_entry);
+	dasd_devices_entry->proc_fops = &dasd_devices_file_ops;
+	dasd_devices_entry->owner = THIS_MODULE;
+	dasd_statistics_entry = create_proc_entry("statistics",
+						  S_IFREG | S_IRUGO | S_IWUSR,
+						  dasd_proc_root_entry);
+	dasd_statistics_entry->read_proc = dasd_statistics_read;
+	dasd_statistics_entry->write_proc = dasd_statistics_write;
+	dasd_statistics_entry->owner = THIS_MODULE;
+	return 0;
+}
+
+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", &proc_root);
+}