[PATCH] kill the unused bsize on the send side of /dev/loop

[net-next-2.6.git] / fs / block_dev.c

diff --git a/fs/block_dev.c b/fs/block_dev.c
index b721955d382ebbd3e8b1467bf02f53ad0ae7b8fa..55124ac8c7ad4b289f2a34f060598d89803cb9e4 100644 (file)
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -840,7 +840,7 @@ EXPORT_SYMBOL_GPL(bd_release_from_disk);
  * to be used for internal purposes.  If you ever need it - reconsider
  * your API.
  */
-struct block_device *open_by_devnum(dev_t dev, unsigned mode)
+struct block_device *open_by_devnum(dev_t dev, fmode_t mode)
 {
        struct block_device *bdev = bdget(dev);
        int err = -ENOMEM;
@@ -853,9 +853,33 @@ struct block_device *open_by_devnum(dev_t dev, unsigned mode)
 EXPORT_SYMBOL(open_by_devnum);
 
 /**
- * check_disk_size_change - checks for disk size change and adjusts
- *                          bdev size.
+ * flush_disk - invalidates all buffer-cache entries on a disk
  *
+ * @bdev:      struct block device to be flushed
+ *
+ * Invalidates all buffer-cache entries on a disk. It should be called
+ * when a disk has been changed -- either by a media change or online
+ * resize.
+ */
+static void flush_disk(struct block_device *bdev)
+{
+       if (__invalidate_device(bdev)) {
+               char name[BDEVNAME_SIZE] = "";
+
+               if (bdev->bd_disk)
+                       disk_name(bdev->bd_disk, 0, name);
+               printk(KERN_WARNING "VFS: busy inodes on changed media or "
+                      "resized disk %s\n", name);
+       }
+
+       if (!bdev->bd_disk)
+               return;
+       if (disk_partitionable(bdev->bd_disk))
+               bdev->bd_invalidated = 1;
+}
+
+/**
+ * check_disk_size_change - checks for disk size change and adjusts bdev size.
  * @disk: struct gendisk to check
  * @bdev: struct bdev to adjust.
  *
@@ -876,14 +900,13 @@ void check_disk_size_change(struct gendisk *disk, struct block_device *bdev)
                       "%s: detected capacity change from %lld to %lld\n",
                       name, bdev_size, disk_size);
                i_size_write(bdev->bd_inode, disk_size);
+               flush_disk(bdev);
        }
 }
 EXPORT_SYMBOL(check_disk_size_change);
 
 /**
- * revalidate_disk - wrapper for lower-level driver's revalidate_disk
- *                   call-back
- *
+ * revalidate_disk - wrapper for lower-level driver's revalidate_disk call-back
  * @disk: struct gendisk to be revalidated
  *
  * This routine is a wrapper for lower-level driver's revalidate_disk
@@ -929,13 +952,9 @@ int check_disk_change(struct block_device *bdev)
        if (!bdops->media_changed(bdev->bd_disk))
                return 0;
 
-       if (__invalidate_device(bdev))
-               printk("VFS: busy inodes on changed media.\n");
-
+       flush_disk(bdev);
        if (bdops->revalidate_disk)
                bdops->revalidate_disk(bdev->bd_disk);
-       if (disk_partitionable(bdev->bd_disk))
-               bdev->bd_invalidated = 1;
        return 1;
 }
 
@@ -956,7 +975,7 @@ void bd_set_size(struct block_device *bdev, loff_t size)
 }
 EXPORT_SYMBOL(bd_set_size);
 
-static int __blkdev_get(struct block_device *bdev, mode_t mode, unsigned flags,
+static int __blkdev_get(struct block_device *bdev, fmode_t mode, unsigned flags,
                        int for_part);
 static int __blkdev_put(struct block_device *bdev, int for_part);
 
@@ -988,6 +1007,13 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
                return ret;
        }
 
+       if (file->f_flags & O_NDELAY)
+               file->f_mode |= FMODE_NDELAY;
+       if (file->f_flags & O_EXCL)
+               file->f_mode |= FMODE_EXCL;
+       if ((file->f_flags & O_ACCMODE) == 3)
+               file->f_mode |= FMODE_WRITE_IOCTL;
+
        ret = -ENXIO;
        file->f_mapping = bdev->bd_inode->i_mapping;
 
@@ -1008,7 +1034,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
                if (!partno) {
                        struct backing_dev_info *bdi;
                        if (disk->fops->open) {
-                               ret = disk->fops->open(bdev->bd_inode, file);
+                               ret = disk->fops->open(bdev, file->f_mode);
                                if (ret)
                                        goto out_clear;
                        }
@@ -1049,7 +1075,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
                disk = NULL;
                if (bdev->bd_contains == bdev) {
                        if (bdev->bd_disk->fops->open) {
-                               ret = bdev->bd_disk->fops->open(bdev->bd_inode, file);
+                               ret = bdev->bd_disk->fops->open(bdev, file->f_mode);
                                if (ret)
                                        goto out_unlock_bdev;
                        }
@@ -1085,7 +1111,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
        return ret;
 }
 
-static int __blkdev_get(struct block_device *bdev, mode_t mode, unsigned flags,
+static int __blkdev_get(struct block_device *bdev, fmode_t mode, unsigned flags,
                        int for_part)
 {
        /*
@@ -1104,7 +1130,7 @@ static int __blkdev_get(struct block_device *bdev, mode_t mode, unsigned flags,
        return do_open(bdev, &fake_file, for_part);
 }
 
-int blkdev_get(struct block_device *bdev, mode_t mode, unsigned flags)
+int blkdev_get(struct block_device *bdev, fmode_t mode, unsigned flags)
 {
        return __blkdev_get(bdev, mode, flags, 0);
 }
@@ -1144,7 +1170,6 @@ static int blkdev_open(struct inode * inode, struct file * filp)
 static int __blkdev_put(struct block_device *bdev, int for_part)
 {
        int ret = 0;
-       struct inode *bd_inode = bdev->bd_inode;
        struct gendisk *disk = bdev->bd_disk;
        struct block_device *victim = NULL;
 
@@ -1159,7 +1184,7 @@ static int __blkdev_put(struct block_device *bdev, int for_part)
        }
        if (bdev->bd_contains == bdev) {
                if (disk->fops->release)
-                       ret = disk->fops->release(bd_inode, NULL);
+                       ret = disk->fops->release(disk, 0);
        }
        if (!bdev->bd_openers) {
                struct module *owner = disk->fops->owner;
@@ -1243,10 +1268,9 @@ EXPORT_SYMBOL(ioctl_by_bdev);
 
 /**
  * lookup_bdev  - lookup a struct block_device by name
- *
  * @path:      special file representing the block device
  *
- * Get a reference to the blockdevice at @path in the current
+ * Get a reference to the blockdevice at @pathname in the current
  * namespace if possible and return it.  Return ERR_PTR(error)
  * otherwise.
  */
@@ -1297,7 +1321,7 @@ EXPORT_SYMBOL(lookup_bdev);
 struct block_device *open_bdev_excl(const char *path, int flags, void *holder)
 {
        struct block_device *bdev;
-       mode_t mode = FMODE_READ;
+       fmode_t mode = FMODE_READ;
        int error = 0;
 
        bdev = lookup_bdev(path);