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_ioctl.c b/drivers/s390/block/dasd_ioctl.c
new file mode 100644
index 0000000..f1892ba
--- /dev/null
+++ b/drivers/s390/block/dasd_ioctl.c
@@ -0,0 +1,554 @@
+/*
+ * File...........: linux/drivers/s390/block/dasd_ioctl.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
+ *
+ * i/o controls for the dasd driver.
+ */
+#include <linux/config.h>
+#include <linux/interrupt.h>
+#include <linux/major.h>
+#include <linux/fs.h>
+#include <linux/blkpg.h>
+
+#include <asm/ccwdev.h>
+#include <asm/uaccess.h>
+
+/* This is ugly... */
+#define PRINTK_HEADER "dasd_ioctl:"
+
+#include "dasd_int.h"
+
+/*
+ * SECTION: ioctl functions.
+ */
+static struct list_head dasd_ioctl_list = LIST_HEAD_INIT(dasd_ioctl_list);
+
+/*
+ * Find the ioctl with number no.
+ */
+static struct dasd_ioctl *
+dasd_find_ioctl(int no)
+{
+ struct dasd_ioctl *ioctl;
+
+ list_for_each_entry (ioctl, &dasd_ioctl_list, list)
+ if (ioctl->no == no)
+ return ioctl;
+ return NULL;
+}
+
+/*
+ * Register ioctl with number no.
+ */
+int
+dasd_ioctl_no_register(struct module *owner, int no, dasd_ioctl_fn_t handler)
+{
+ struct dasd_ioctl *new;
+ if (dasd_find_ioctl(no))
+ return -EBUSY;
+ new = kmalloc(sizeof (struct dasd_ioctl), GFP_KERNEL);
+ if (new == NULL)
+ return -ENOMEM;
+ new->owner = owner;
+ new->no = no;
+ new->handler = handler;
+ list_add(&new->list, &dasd_ioctl_list);
+ return 0;
+}
+
+/*
+ * Deregister ioctl with number no.
+ */
+int
+dasd_ioctl_no_unregister(struct module *owner, int no, dasd_ioctl_fn_t handler)
+{
+ struct dasd_ioctl *old = dasd_find_ioctl(no);
+ if (old == NULL)
+ return -ENOENT;
+ if (old->no != no || old->handler != handler || owner != old->owner)
+ return -EINVAL;
+ list_del(&old->list);
+ kfree(old);
+ return 0;
+}
+
+int
+dasd_ioctl(struct inode *inp, struct file *filp,
+ unsigned int no, unsigned long data)
+{
+ struct block_device *bdev = inp->i_bdev;
+ struct dasd_device *device = bdev->bd_disk->private_data;
+ struct dasd_ioctl *ioctl;
+ const char *dir;
+ int rc;
+
+ if ((_IOC_DIR(no) != _IOC_NONE) && (data == 0)) {
+ PRINT_DEBUG("empty data ptr");
+ return -EINVAL;
+ }
+ dir = _IOC_DIR (no) == _IOC_NONE ? "0" :
+ _IOC_DIR (no) == _IOC_READ ? "r" :
+ _IOC_DIR (no) == _IOC_WRITE ? "w" :
+ _IOC_DIR (no) == (_IOC_READ | _IOC_WRITE) ? "rw" : "u";
+ DBF_DEV_EVENT(DBF_DEBUG, device,
+ "ioctl 0x%08x %s'0x%x'%d(%d) with data %8lx", no,
+ dir, _IOC_TYPE(no), _IOC_NR(no), _IOC_SIZE(no), data);
+ /* Search for ioctl no in the ioctl list. */
+ list_for_each_entry(ioctl, &dasd_ioctl_list, list) {
+ if (ioctl->no == no) {
+ /* Found a matching ioctl. Call it. */
+ if (!try_module_get(ioctl->owner))
+ continue;
+ rc = ioctl->handler(bdev, no, data);
+ module_put(ioctl->owner);
+ return rc;
+ }
+ }
+ /* No ioctl with number no. */
+ DBF_DEV_EVENT(DBF_INFO, device,
+ "unknown ioctl 0x%08x=%s'0x%x'%d(%d) data %8lx", no,
+ dir, _IOC_TYPE(no), _IOC_NR(no), _IOC_SIZE(no), data);
+ return -EINVAL;
+}
+
+static int
+dasd_ioctl_api_version(struct block_device *bdev, int no, long args)
+{
+ int ver = DASD_API_VERSION;
+ return put_user(ver, (int __user *) args);
+}
+
+/*
+ * Enable device.
+ * used by dasdfmt after BIODASDDISABLE to retrigger blocksize detection
+ */
+static int
+dasd_ioctl_enable(struct block_device *bdev, int no, long args)
+{
+ struct dasd_device *device;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ device = bdev->bd_disk->private_data;
+ if (device == NULL)
+ return -ENODEV;
+ dasd_enable_device(device);
+ /* Formatting the dasd device can change the capacity. */
+ down(&bdev->bd_sem);
+ i_size_write(bdev->bd_inode, (loff_t)get_capacity(device->gdp) << 9);
+ up(&bdev->bd_sem);
+ return 0;
+}
+
+/*
+ * Disable device.
+ * Used by dasdfmt. Disable I/O operations but allow ioctls.
+ */
+static int
+dasd_ioctl_disable(struct block_device *bdev, int no, long args)
+{
+ struct dasd_device *device;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ device = bdev->bd_disk->private_data;
+ if (device == NULL)
+ return -ENODEV;
+ /*
+ * Man this is sick. We don't do a real disable but only downgrade
+ * the device to DASD_STATE_BASIC. The reason is that dasdfmt uses
+ * BIODASDDISABLE to disable accesses to the device via the block
+ * device layer but it still wants to do i/o on the device by
+ * using the BIODASDFMT ioctl. Therefore the correct state for the
+ * device is DASD_STATE_BASIC that allows to do basic i/o.
+ */
+ dasd_set_target_state(device, DASD_STATE_BASIC);
+ /*
+ * Set i_size to zero, since read, write, etc. check against this
+ * value.
+ */
+ down(&bdev->bd_sem);
+ i_size_write(bdev->bd_inode, 0);
+ up(&bdev->bd_sem);
+ return 0;
+}
+
+/*
+ * Quiesce device.
+ */
+static int
+dasd_ioctl_quiesce(struct block_device *bdev, int no, long args)
+{
+ struct dasd_device *device;
+ unsigned long flags;
+
+ if (!capable (CAP_SYS_ADMIN))
+ return -EACCES;
+
+ device = bdev->bd_disk->private_data;
+ if (device == NULL)
+ return -ENODEV;
+
+ DEV_MESSAGE (KERN_DEBUG, device, "%s",
+ "Quiesce IO on device");
+ spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
+ device->stopped |= DASD_STOPPED_QUIESCE;
+ spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
+ return 0;
+}
+
+
+/*
+ * Quiesce device.
+ */
+static int
+dasd_ioctl_resume(struct block_device *bdev, int no, long args)
+{
+ struct dasd_device *device;
+ unsigned long flags;
+
+ if (!capable (CAP_SYS_ADMIN))
+ return -EACCES;
+
+ device = bdev->bd_disk->private_data;
+ if (device == NULL)
+ return -ENODEV;
+
+ DEV_MESSAGE (KERN_DEBUG, device, "%s",
+ "resume IO on device");
+
+ spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
+ device->stopped &= ~DASD_STOPPED_QUIESCE;
+ spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
+
+ dasd_schedule_bh (device);
+ return 0;
+}
+
+/*
+ * performs formatting of _device_ according to _fdata_
+ * Note: The discipline's format_function is assumed to deliver formatting
+ * commands to format a single unit of the device. In terms of the ECKD
+ * devices this means CCWs are generated to format a single track.
+ */
+static int
+dasd_format(struct dasd_device * device, struct format_data_t * fdata)
+{
+ struct dasd_ccw_req *cqr;
+ int rc;
+
+ if (device->discipline->format_device == NULL)
+ return -EPERM;
+
+ if (device->state != DASD_STATE_BASIC) {
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "dasd_format: device is not disabled! ");
+ return -EBUSY;
+ }
+
+ DBF_DEV_EVENT(DBF_NOTICE, device,
+ "formatting units %d to %d (%d B blocks) flags %d",
+ fdata->start_unit,
+ fdata->stop_unit, fdata->blksize, fdata->intensity);
+
+ /* Since dasdfmt keeps the device open after it was disabled,
+ * there still exists an inode for this device.
+ * We must update i_blkbits, otherwise we might get errors when
+ * enabling the device later.
+ */
+ if (fdata->start_unit == 0) {
+ struct block_device *bdev = bdget_disk(device->gdp, 0);
+ bdev->bd_inode->i_blkbits = blksize_bits(fdata->blksize);
+ bdput(bdev);
+ }
+
+ while (fdata->start_unit <= fdata->stop_unit) {
+ cqr = device->discipline->format_device(device, fdata);
+ if (IS_ERR(cqr))
+ return PTR_ERR(cqr);
+ rc = dasd_sleep_on_interruptible(cqr);
+ dasd_sfree_request(cqr, cqr->device);
+ if (rc) {
+ if (rc != -ERESTARTSYS)
+ DEV_MESSAGE(KERN_ERR, device,
+ " Formatting of unit %d failed "
+ "with rc = %d",
+ fdata->start_unit, rc);
+ return rc;
+ }
+ fdata->start_unit++;
+ }
+ return 0;
+}
+
+/*
+ * Format device.
+ */
+static int
+dasd_ioctl_format(struct block_device *bdev, int no, long args)
+{
+ struct dasd_device *device;
+ struct format_data_t fdata;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (!args)
+ return -EINVAL;
+ /* fdata == NULL is no longer a valid arg to dasd_format ! */
+ device = bdev->bd_disk->private_data;
+
+ if (device == NULL)
+ return -ENODEV;
+ if (test_bit(DASD_FLAG_RO, &device->flags))
+ return -EROFS;
+ if (copy_from_user(&fdata, (void __user *) args,
+ sizeof (struct format_data_t)))
+ return -EFAULT;
+ if (bdev != bdev->bd_contains) {
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "Cannot low-level format a partition");
+ return -EINVAL;
+ }
+ return dasd_format(device, &fdata);
+}
+
+#ifdef CONFIG_DASD_PROFILE
+/*
+ * Reset device profile information
+ */
+static int
+dasd_ioctl_reset_profile(struct block_device *bdev, int no, long args)
+{
+ struct dasd_device *device;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ device = bdev->bd_disk->private_data;
+ if (device == NULL)
+ return -ENODEV;
+
+ memset(&device->profile, 0, sizeof (struct dasd_profile_info_t));
+ return 0;
+}
+
+/*
+ * Return device profile information
+ */
+static int
+dasd_ioctl_read_profile(struct block_device *bdev, int no, long args)
+{
+ struct dasd_device *device;
+
+ device = bdev->bd_disk->private_data;
+ if (device == NULL)
+ return -ENODEV;
+
+ if (copy_to_user((long __user *) args, (long *) &device->profile,
+ sizeof (struct dasd_profile_info_t)))
+ return -EFAULT;
+ return 0;
+}
+#else
+static int
+dasd_ioctl_reset_profile(struct block_device *bdev, int no, long args)
+{
+ return -ENOSYS;
+}
+
+static int
+dasd_ioctl_read_profile(struct block_device *bdev, int no, long args)
+{
+ return -ENOSYS;
+}
+#endif
+
+/*
+ * Return dasd information. Used for BIODASDINFO and BIODASDINFO2.
+ */
+static int
+dasd_ioctl_information(struct block_device *bdev, int no, long args)
+{
+ struct dasd_device *device;
+ struct dasd_information2_t *dasd_info;
+ unsigned long flags;
+ int rc;
+ struct ccw_device *cdev;
+
+ device = bdev->bd_disk->private_data;
+ if (device == NULL)
+ return -ENODEV;
+
+ if (!device->discipline->fill_info)
+ return -EINVAL;
+
+ dasd_info = kmalloc(sizeof(struct dasd_information2_t), GFP_KERNEL);
+ if (dasd_info == NULL)
+ return -ENOMEM;
+
+ rc = device->discipline->fill_info(device, dasd_info);
+ if (rc) {
+ kfree(dasd_info);
+ return rc;
+ }
+
+ cdev = device->cdev;
+
+ dasd_info->devno = _ccw_device_get_device_number(device->cdev);
+ dasd_info->schid = _ccw_device_get_subchannel_number(device->cdev);
+ dasd_info->cu_type = cdev->id.cu_type;
+ dasd_info->cu_model = cdev->id.cu_model;
+ dasd_info->dev_type = cdev->id.dev_type;
+ dasd_info->dev_model = cdev->id.dev_model;
+ dasd_info->open_count = atomic_read(&device->open_count);
+ dasd_info->status = device->state;
+
+ /*
+ * check if device is really formatted
+ * LDL / CDL was returned by 'fill_info'
+ */
+ if ((device->state < DASD_STATE_READY) ||
+ (dasd_check_blocksize(device->bp_block)))
+ dasd_info->format = DASD_FORMAT_NONE;
+
+ dasd_info->features |= test_bit(DASD_FLAG_RO, &device->flags) ?
+ DASD_FEATURE_READONLY : DASD_FEATURE_DEFAULT;
+
+ if (device->discipline)
+ memcpy(dasd_info->type, device->discipline->name, 4);
+ else
+ memcpy(dasd_info->type, "none", 4);
+ dasd_info->req_queue_len = 0;
+ dasd_info->chanq_len = 0;
+ if (device->request_queue->request_fn) {
+ struct list_head *l;
+#ifdef DASD_EXTENDED_PROFILING
+ {
+ struct list_head *l;
+ spin_lock_irqsave(&device->lock, flags);
+ list_for_each(l, &device->request_queue->queue_head)
+ dasd_info->req_queue_len++;
+ spin_unlock_irqrestore(&device->lock, flags);
+ }
+#endif /* DASD_EXTENDED_PROFILING */
+ spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
+ list_for_each(l, &device->ccw_queue)
+ dasd_info->chanq_len++;
+ spin_unlock_irqrestore(get_ccwdev_lock(device->cdev),
+ flags);
+ }
+
+ rc = 0;
+ if (copy_to_user((long __user *) args, (long *) dasd_info,
+ ((no == (unsigned int) BIODASDINFO2) ?
+ sizeof (struct dasd_information2_t) :
+ sizeof (struct dasd_information_t))))
+ rc = -EFAULT;
+ kfree(dasd_info);
+ return rc;
+}
+
+/*
+ * Set read only
+ */
+static int
+dasd_ioctl_set_ro(struct block_device *bdev, int no, long args)
+{
+ struct dasd_device *device;
+ int intval;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (bdev != bdev->bd_contains)
+ // ro setting is not allowed for partitions
+ return -EINVAL;
+ if (get_user(intval, (int __user *) args))
+ return -EFAULT;
+ device = bdev->bd_disk->private_data;
+ if (device == NULL)
+ return -ENODEV;
+ set_disk_ro(bdev->bd_disk, intval);
+ if (intval)
+ set_bit(DASD_FLAG_RO, &device->flags);
+ else
+ clear_bit(DASD_FLAG_RO, &device->flags);
+ return 0;
+}
+
+/*
+ * Return disk geometry.
+ */
+static int
+dasd_ioctl_getgeo(struct block_device *bdev, int no, long args)
+{
+ struct hd_geometry geo = { 0, };
+ struct dasd_device *device;
+
+ device = bdev->bd_disk->private_data;
+ if (device == NULL)
+ return -ENODEV;
+
+ if (device == NULL || device->discipline == NULL ||
+ device->discipline->fill_geometry == NULL)
+ return -EINVAL;
+
+ geo = (struct hd_geometry) {};
+ device->discipline->fill_geometry(device, &geo);
+ geo.start = get_start_sect(bdev) >> device->s2b_shift;
+ if (copy_to_user((struct hd_geometry __user *) args, &geo,
+ sizeof (struct hd_geometry)))
+ return -EFAULT;
+
+ return 0;
+}
+
+/*
+ * List of static ioctls.
+ */
+static struct { int no; dasd_ioctl_fn_t fn; } dasd_ioctls[] =
+{
+ { BIODASDDISABLE, dasd_ioctl_disable },
+ { BIODASDENABLE, dasd_ioctl_enable },
+ { BIODASDQUIESCE, dasd_ioctl_quiesce },
+ { BIODASDRESUME, dasd_ioctl_resume },
+ { BIODASDFMT, dasd_ioctl_format },
+ { BIODASDINFO, dasd_ioctl_information },
+ { BIODASDINFO2, dasd_ioctl_information },
+ { BIODASDPRRD, dasd_ioctl_read_profile },
+ { BIODASDPRRST, dasd_ioctl_reset_profile },
+ { BLKROSET, dasd_ioctl_set_ro },
+ { DASDAPIVER, dasd_ioctl_api_version },
+ { HDIO_GETGEO, dasd_ioctl_getgeo },
+ { -1, NULL }
+};
+
+int
+dasd_ioctl_init(void)
+{
+ int i;
+
+ for (i = 0; dasd_ioctls[i].no != -1; i++)
+ dasd_ioctl_no_register(NULL, dasd_ioctls[i].no,
+ dasd_ioctls[i].fn);
+ return 0;
+
+}
+
+void
+dasd_ioctl_exit(void)
+{
+ int i;
+
+ for (i = 0; dasd_ioctls[i].no != -1; i++)
+ dasd_ioctl_no_unregister(NULL, dasd_ioctls[i].no,
+ dasd_ioctls[i].fn);
+
+}
+
+EXPORT_SYMBOL(dasd_ioctl_no_register);
+EXPORT_SYMBOL(dasd_ioctl_no_unregister);