1 files changed, 128 insertions, 0 deletions
diff --git a/linux/dev/drivers/scsi/sd_ioctl.c b/linux/dev/drivers/scsi/sd_ioctl.c
new file mode 100644
index 0000000..4c58f04
--- /dev/null
+++ b/linux/dev/drivers/scsi/sd_ioctl.c
@@ -0,0 +1,128 @@
+/*
+ * drivers/scsi/sd_ioctl.c
+ *
+ * ioctl handling for SCSI disks
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/hdreg.h>
+#include <linux/errno.h>
+
+#include <asm/segment.h>
+
+#include <linux/blk.h>
+#include "scsi.h"
+#include <scsi/scsi_ioctl.h>
+#include "hosts.h"
+#include "sd.h"
+#include <scsi/scsicam.h>     /* must follow "hosts.h" */
+
+int sd_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg)
+{
+    kdev_t dev = inode->i_rdev;
+    int error;
+    struct Scsi_Host * host;
+    int diskinfo[4];
+    struct hd_geometry *loc = (struct hd_geometry *) arg;
+    
+    switch (cmd) {
+    case HDIO_GETGEO:   /* Return BIOS disk parameters */
+	if (!loc)  return -EINVAL;
+#ifndef MACH
+	error = verify_area(VERIFY_WRITE, loc, sizeof(*loc));
+	if (error)
+	    return error;
+#endif
+	host = rscsi_disks[MINOR(dev) >> 4].device->host;
+
+/* default to most commonly used values */
+
+        diskinfo[0] = 0x40;
+        diskinfo[1] = 0x20;
+        diskinfo[2] = rscsi_disks[MINOR(dev) >> 4].capacity >> 11;
+
+/* override with calculated, extended default, or driver values */
+
+	if(host->hostt->bios_param != NULL)
+	    host->hostt->bios_param(&rscsi_disks[MINOR(dev) >> 4],
+				    dev,
+				    &diskinfo[0]);
+        else scsicam_bios_param(&rscsi_disks[MINOR(dev) >> 4],
+				dev, &diskinfo[0]);
+
+#ifdef MACH
+        loc->heads = diskinfo[0];
+        loc->sectors = diskinfo[1];
+        loc->cylinders = diskinfo[2];
+        loc->start = sd[MINOR(inode->i_rdev)].start_sect;
+#else
+	put_user(diskinfo[0], &loc->heads);
+	put_user(diskinfo[1], &loc->sectors);
+	put_user(diskinfo[2], &loc->cylinders);
+	put_user(sd[MINOR(inode->i_rdev)].start_sect, &loc->start);
+#endif
+	return 0;
+    case BLKGETSIZE:   /* Return device size */
+	if (!arg)  return -EINVAL;
+	error = verify_area(VERIFY_WRITE, (long *) arg, sizeof(long));
+	if (error)
+	    return error;
+	put_user(sd[MINOR(inode->i_rdev)].nr_sects,
+		 (long *) arg);
+	return 0;
+
+    case BLKRASET:
+	if (!suser())
+		return -EACCES;
+	if(!(inode->i_rdev)) return -EINVAL;
+	if(arg > 0xff) return -EINVAL;
+	read_ahead[MAJOR(inode->i_rdev)] = arg;
+	return 0;
+
+    case BLKRAGET:
+	if (!arg)
+		return -EINVAL;
+	error = verify_area(VERIFY_WRITE, (int *) arg, sizeof(int));
+	if (error)
+	    return error;
+	put_user(read_ahead[MAJOR(inode->i_rdev)], (int *) arg);
+	return 0;
+
+    case BLKFLSBUF:
+	if(!suser())  return -EACCES;
+	if(!(inode->i_rdev)) return -EINVAL;
+	fsync_dev(inode->i_rdev);
+	invalidate_buffers(inode->i_rdev);
+	return 0;
+	
+    case BLKRRPART: /* Re-read partition tables */
+	return revalidate_scsidisk(dev, 1);
+
+    RO_IOCTLS(dev, arg);
+
+    default:
+	return scsi_ioctl(rscsi_disks[MINOR(dev) >> 4].device , cmd, (void *) arg);
+    }
+}
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-indent-level: 4
+ * c-brace-imaginary-offset: 0
+ * c-brace-offset: -4
+ * c-argdecl-indent: 4
+ * c-label-offset: -4
+ * c-continued-statement-offset: 4
+ * c-continued-brace-offset: 0
+ * indent-tabs-mode: nil
+ * tab-width: 8
+ * End:
+ */