Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / s390 / char / tape_proc.c

diff --git a/kernel/drivers/s390/char/tape_proc.c b/kernel/drivers/s390/char/tape_proc.c
new file mode 100644 (file)
index 0000000..8733b23
--- /dev/null
+++ b/kernel/drivers/s390/char/tape_proc.c
@@ -0,0 +1,143 @@
+/*
+ *    tape device driver for S/390 and zSeries tapes.
+ *
+ *  S390 and zSeries version
+ *    Copyright IBM Corp. 2001
+ *    Author(s): Carsten Otte <cotte@de.ibm.com>
+ *              Michael Holzheu <holzheu@de.ibm.com>
+ *              Tuan Ngo-Anh <ngoanh@de.ibm.com>
+ *
+ * PROCFS Functions
+ */
+
+#define KMSG_COMPONENT "tape"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/module.h>
+#include <linux/vmalloc.h>
+#include <linux/seq_file.h>
+#include <linux/proc_fs.h>
+
+#define TAPE_DBF_AREA  tape_core_dbf
+
+#include "tape.h"
+
+static const char *tape_med_st_verbose[MS_SIZE] =
+{
+       [MS_UNKNOWN] = "UNKNOWN ",
+       [MS_LOADED] = "LOADED  ",
+       [MS_UNLOADED] = "UNLOADED"
+};
+
+/* our proc tapedevices entry */
+static struct proc_dir_entry *tape_proc_devices;
+
+/*
+ * Show function for /proc/tapedevices
+ */
+static int tape_proc_show(struct seq_file *m, void *v)
+{
+       struct tape_device *device;
+       struct tape_request *request;
+       const char *str;
+       unsigned long n;
+
+       n = (unsigned long) v - 1;
+       if (!n) {
+               seq_printf(m, "TapeNo\tBusID      CuType/Model\t"
+                       "DevType/Model\tBlkSize\tState\tOp\tMedState\n");
+       }
+       device = tape_find_device(n);
+       if (IS_ERR(device))
+               return 0;
+       spin_lock_irq(get_ccwdev_lock(device->cdev));
+       seq_printf(m, "%d\t", (int) n);
+       seq_printf(m, "%-10.10s ", dev_name(&device->cdev->dev));
+       seq_printf(m, "%04X/", device->cdev->id.cu_type);
+       seq_printf(m, "%02X\t", device->cdev->id.cu_model);
+       seq_printf(m, "%04X/", device->cdev->id.dev_type);
+       seq_printf(m, "%02X\t\t", device->cdev->id.dev_model);
+       if (device->char_data.block_size == 0)
+               seq_printf(m, "auto\t");
+       else
+               seq_printf(m, "%i\t", device->char_data.block_size);
+       if (device->tape_state >= 0 &&
+           device->tape_state < TS_SIZE)
+               str = tape_state_verbose[device->tape_state];
+       else
+               str = "UNKNOWN";
+       seq_printf(m, "%s\t", str);
+       if (!list_empty(&device->req_queue)) {
+               request = list_entry(device->req_queue.next,
+                                    struct tape_request, list);
+               str = tape_op_verbose[request->op];
+       } else
+               str = "---";
+       seq_printf(m, "%s\t", str);
+       seq_printf(m, "%s\n", tape_med_st_verbose[device->medium_state]);
+       spin_unlock_irq(get_ccwdev_lock(device->cdev));
+       tape_put_device(device);
+        return 0;
+}
+
+static void *tape_proc_start(struct seq_file *m, loff_t *pos)
+{
+       if (*pos >= 256 / TAPE_MINORS_PER_DEV)
+               return NULL;
+       return (void *)((unsigned long) *pos + 1);
+}
+
+static void *tape_proc_next(struct seq_file *m, void *v, loff_t *pos)
+{
+       ++*pos;
+       return tape_proc_start(m, pos);
+}
+
+static void tape_proc_stop(struct seq_file *m, void *v)
+{
+}
+
+static const struct seq_operations tape_proc_seq = {
+       .start          = tape_proc_start,
+       .next           = tape_proc_next,
+       .stop           = tape_proc_stop,
+       .show           = tape_proc_show,
+};
+
+static int tape_proc_open(struct inode *inode, struct file *file)
+{
+       return seq_open(file, &tape_proc_seq);
+}
+
+static const struct file_operations tape_proc_ops =
+{
+       .owner          = THIS_MODULE,
+       .open           = tape_proc_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = seq_release,
+};
+
+/*
+ * Initialize procfs stuff on startup
+ */
+void
+tape_proc_init(void)
+{
+       tape_proc_devices =
+               proc_create("tapedevices", S_IFREG | S_IRUGO | S_IWUSR, NULL,
+                           &tape_proc_ops);
+       if (tape_proc_devices == NULL) {
+               return;
+       }
+}
+
+/*
+ * Cleanup all stuff registered to the procfs
+ */
+void
+tape_proc_cleanup(void)
+{
+       if (tape_proc_devices != NULL)
+               remove_proc_entry ("tapedevices", NULL);
+}