Linux-2.6.12-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!
diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c
new file mode 100644
index 0000000..1d52db4
--- /dev/null
+++ b/drivers/s390/block/dasd_genhd.c
@@ -0,0 +1,185 @@
+/*
+ * File...........: linux/drivers/s390/block/dasd_genhd.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, 1999-2001
+ *
+ * gendisk related functions for the dasd driver.
+ *
+ * $Revision: 1.48 $
+ */
+
+#include <linux/config.h>
+#include <linux/interrupt.h>
+#include <linux/fs.h>
+#include <linux/blkpg.h>
+
+#include <asm/uaccess.h>
+
+/* This is ugly... */
+#define PRINTK_HEADER "dasd_gendisk:"
+
+#include "dasd_int.h"
+
+/*
+ * Allocate and register gendisk structure for device.
+ */
+int
+dasd_gendisk_alloc(struct dasd_device *device)
+{
+ struct gendisk *gdp;
+ int len;
+
+ /* Make sure the minor for this device exists. */
+ if (device->devindex >= DASD_PER_MAJOR)
+ return -EBUSY;
+
+ gdp = alloc_disk(1 << DASD_PARTN_BITS);
+ if (!gdp)
+ return -ENOMEM;
+
+ /* Initialize gendisk structure. */
+ gdp->major = DASD_MAJOR;
+ gdp->first_minor = device->devindex << DASD_PARTN_BITS;
+ gdp->fops = &dasd_device_operations;
+ gdp->driverfs_dev = &device->cdev->dev;
+
+ /*
+ * Set device name.
+ * dasda - dasdz : 26 devices
+ * dasdaa - dasdzz : 676 devices, added up = 702
+ * dasdaaa - dasdzzz : 17576 devices, added up = 18278
+ * dasdaaaa - dasdzzzz : 456976 devices, added up = 475252
+ */
+ len = sprintf(gdp->disk_name, "dasd");
+ if (device->devindex > 25) {
+ if (device->devindex > 701) {
+ if (device->devindex > 18277)
+ len += sprintf(gdp->disk_name + len, "%c",
+ 'a'+(((device->devindex-18278)
+ /17576)%26));
+ len += sprintf(gdp->disk_name + len, "%c",
+ 'a'+(((device->devindex-702)/676)%26));
+ }
+ len += sprintf(gdp->disk_name + len, "%c",
+ 'a'+(((device->devindex-26)/26)%26));
+ }
+ len += sprintf(gdp->disk_name + len, "%c", 'a'+(device->devindex%26));
+
+ sprintf(gdp->devfs_name, "dasd/%s", device->cdev->dev.bus_id);
+
+ if (test_bit(DASD_FLAG_RO, &device->flags))
+ set_disk_ro(gdp, 1);
+ gdp->private_data = device;
+ gdp->queue = device->request_queue;
+ device->gdp = gdp;
+ set_capacity(device->gdp, 0);
+ add_disk(device->gdp);
+ return 0;
+}
+
+/*
+ * Unregister and free gendisk structure for device.
+ */
+void
+dasd_gendisk_free(struct dasd_device *device)
+{
+ del_gendisk(device->gdp);
+ device->gdp->queue = 0;
+ put_disk(device->gdp);
+ device->gdp = 0;
+}
+
+/*
+ * Trigger a partition detection.
+ */
+int
+dasd_scan_partitions(struct dasd_device * device)
+{
+ struct block_device *bdev;
+
+ /* Make the disk known. */
+ set_capacity(device->gdp, device->blocks << device->s2b_shift);
+ bdev = bdget_disk(device->gdp, 0);
+ if (!bdev || blkdev_get(bdev, FMODE_READ, 1) < 0)
+ return -ENODEV;
+ /*
+ * See fs/partition/check.c:register_disk,rescan_partitions
+ * Can't call rescan_partitions directly. Use ioctl.
+ */
+ ioctl_by_bdev(bdev, BLKRRPART, 0);
+ /*
+ * Since the matching blkdev_put call to the blkdev_get in
+ * this function is not called before dasd_destroy_partitions
+ * the offline open_count limit needs to be increased from
+ * 0 to 1. This is done by setting device->bdev (see
+ * dasd_generic_set_offline). As long as the partition
+ * detection is running no offline should be allowed. That
+ * is why the assignment to device->bdev is done AFTER
+ * the BLKRRPART ioctl.
+ */
+ device->bdev = bdev;
+ return 0;
+}
+
+/*
+ * Remove all inodes in the system for a device, delete the
+ * partitions and make device unusable by setting its size to zero.
+ */
+void
+dasd_destroy_partitions(struct dasd_device * device)
+{
+ /* The two structs have 168/176 byte on 31/64 bit. */
+ struct blkpg_partition bpart;
+ struct blkpg_ioctl_arg barg;
+ struct block_device *bdev;
+
+ /*
+ * Get the bdev pointer from the device structure and clear
+ * device->bdev to lower the offline open_count limit again.
+ */
+ bdev = device->bdev;
+ device->bdev = 0;
+
+ /*
+ * See fs/partition/check.c:delete_partition
+ * Can't call delete_partitions directly. Use ioctl.
+ * The ioctl also does locking and invalidation.
+ */
+ memset(&bpart, 0, sizeof(struct blkpg_partition));
+ memset(&barg, 0, sizeof(struct blkpg_ioctl_arg));
+ barg.data = &bpart;
+ barg.op = BLKPG_DEL_PARTITION;
+ for (bpart.pno = device->gdp->minors - 1; bpart.pno > 0; bpart.pno--)
+ ioctl_by_bdev(bdev, BLKPG, (unsigned long) &barg);
+
+ invalidate_partition(device->gdp, 0);
+ /* Matching blkdev_put to the blkdev_get in dasd_scan_partitions. */
+ blkdev_put(bdev);
+ set_capacity(device->gdp, 0);
+}
+
+int
+dasd_gendisk_init(void)
+{
+ int rc;
+
+ /* Register to static dasd major 94 */
+ rc = register_blkdev(DASD_MAJOR, "dasd");
+ if (rc != 0) {
+ MESSAGE(KERN_WARNING,
+ "Couldn't register successfully to "
+ "major no %d", DASD_MAJOR);
+ return rc;
+ }
+ return 0;
+}
+
+void
+dasd_gendisk_exit(void)
+{
+ unregister_blkdev(DASD_MAJOR, "dasd");
+}