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path: root/drivers/block/xen-blkfront.c
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Diffstat (limited to 'drivers/block/xen-blkfront.c')
-rw-r--r--drivers/block/xen-blkfront.c48
1 files changed, 44 insertions, 4 deletions
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index f2fff5799ddf..9ae05c584234 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -38,6 +38,7 @@
38#include <linux/interrupt.h> 38#include <linux/interrupt.h>
39#include <linux/blkdev.h> 39#include <linux/blkdev.h>
40#include <linux/hdreg.h> 40#include <linux/hdreg.h>
41#include <linux/cdrom.h>
41#include <linux/module.h> 42#include <linux/module.h>
42 43
43#include <xen/xenbus.h> 44#include <xen/xenbus.h>
@@ -153,6 +154,40 @@ static int blkif_getgeo(struct block_device *bd, struct hd_geometry *hg)
153 return 0; 154 return 0;
154} 155}
155 156
157int blkif_ioctl(struct inode *inode, struct file *filep,
158 unsigned command, unsigned long argument)
159{
160 struct blkfront_info *info =
161 inode->i_bdev->bd_disk->private_data;
162 int i;
163
164 dev_dbg(&info->xbdev->dev, "command: 0x%x, argument: 0x%lx\n",
165 command, (long)argument);
166
167 switch (command) {
168 case CDROMMULTISESSION:
169 dev_dbg(&info->xbdev->dev, "FIXME: support multisession CDs later\n");
170 for (i = 0; i < sizeof(struct cdrom_multisession); i++)
171 if (put_user(0, (char __user *)(argument + i)))
172 return -EFAULT;
173 return 0;
174
175 case CDROM_GET_CAPABILITY: {
176 struct gendisk *gd = info->gd;
177 if (gd->flags & GENHD_FL_CD)
178 return 0;
179 return -EINVAL;
180 }
181
182 default:
183 /*printk(KERN_ALERT "ioctl %08x not supported by Xen blkdev\n",
184 command);*/
185 return -EINVAL; /* same return as native Linux */
186 }
187
188 return 0;
189}
190
156/* 191/*
157 * blkif_queue_request 192 * blkif_queue_request
158 * 193 *
@@ -324,6 +359,9 @@ static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size)
324 /* Make sure buffer addresses are sector-aligned. */ 359 /* Make sure buffer addresses are sector-aligned. */
325 blk_queue_dma_alignment(rq, 511); 360 blk_queue_dma_alignment(rq, 511);
326 361
362 /* Make sure we don't use bounce buffers. */
363 blk_queue_bounce_limit(rq, BLK_BOUNCE_ANY);
364
327 gd->queue = rq; 365 gd->queue = rq;
328 366
329 return 0; 367 return 0;
@@ -546,7 +584,7 @@ static int setup_blkring(struct xenbus_device *dev,
546 584
547 info->ring_ref = GRANT_INVALID_REF; 585 info->ring_ref = GRANT_INVALID_REF;
548 586
549 sring = (struct blkif_sring *)__get_free_page(GFP_KERNEL); 587 sring = (struct blkif_sring *)__get_free_page(GFP_NOIO | __GFP_HIGH);
550 if (!sring) { 588 if (!sring) {
551 xenbus_dev_fatal(dev, -ENOMEM, "allocating shared ring"); 589 xenbus_dev_fatal(dev, -ENOMEM, "allocating shared ring");
552 return -ENOMEM; 590 return -ENOMEM;
@@ -703,7 +741,8 @@ static int blkif_recover(struct blkfront_info *info)
703 int j; 741 int j;
704 742
705 /* Stage 1: Make a safe copy of the shadow state. */ 743 /* Stage 1: Make a safe copy of the shadow state. */
706 copy = kmalloc(sizeof(info->shadow), GFP_KERNEL); 744 copy = kmalloc(sizeof(info->shadow),
745 GFP_NOIO | __GFP_REPEAT | __GFP_HIGH);
707 if (!copy) 746 if (!copy)
708 return -ENOMEM; 747 return -ENOMEM;
709 memcpy(copy, info->shadow, sizeof(info->shadow)); 748 memcpy(copy, info->shadow, sizeof(info->shadow));
@@ -959,7 +998,7 @@ static int blkif_release(struct inode *inode, struct file *filep)
959 struct xenbus_device *dev = info->xbdev; 998 struct xenbus_device *dev = info->xbdev;
960 enum xenbus_state state = xenbus_read_driver_state(dev->otherend); 999 enum xenbus_state state = xenbus_read_driver_state(dev->otherend);
961 1000
962 if (state == XenbusStateClosing) 1001 if (state == XenbusStateClosing && info->is_ready)
963 blkfront_closing(dev); 1002 blkfront_closing(dev);
964 } 1003 }
965 return 0; 1004 return 0;
@@ -971,6 +1010,7 @@ static struct block_device_operations xlvbd_block_fops =
971 .open = blkif_open, 1010 .open = blkif_open,
972 .release = blkif_release, 1011 .release = blkif_release,
973 .getgeo = blkif_getgeo, 1012 .getgeo = blkif_getgeo,
1013 .ioctl = blkif_ioctl,
974}; 1014};
975 1015
976 1016
@@ -1006,7 +1046,7 @@ static int __init xlblk_init(void)
1006module_init(xlblk_init); 1046module_init(xlblk_init);
1007 1047
1008 1048
1009static void xlblk_exit(void) 1049static void __exit xlblk_exit(void)
1010{ 1050{
1011 return xenbus_unregister_driver(&blkfront); 1051 return xenbus_unregister_driver(&blkfront);
1012} 1052}