Not all device files have trivial fix device sizes like static
ubi volumes. Here the device file size equals the image size it contains.
Signed-off-by: Teresa Remmet <t.remmet@xxxxxxxxx>
---
fs/devfs.c | 5 +++++
include/driver.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/fs/devfs.c b/fs/devfs.c
index 6fabcf8..2a7b1b3 100644
--- a/fs/devfs.c
+++ b/fs/devfs.c
@@ -168,6 +168,11 @@ static int devfs_ioctl(struct device_d *_dev, FILE *f, int request, void *buf)
static int devfs_truncate(struct device_d *dev, FILE *f, ulong size)
{
+ struct cdev *cdev = f->priv;
+
+ if (cdev->ops->truncate)
+ return cdev->ops->truncate(cdev, size);
+
if (f->fsdev->dev.num_resources < 1)
return -ENOSPC;
if (size > resource_size(&f->fsdev->dev.resource[0]))
diff --git a/include/driver.h b/include/driver.h
index 80aa8d8..6abaaad 100644
--- a/include/driver.h
+++ b/include/driver.h
@@ -434,6 +434,7 @@ struct file_operations {
int (*erase)(struct cdev*, loff_t count, loff_t offset);
int (*protect)(struct cdev*, size_t count, loff_t offset, int prot);
int (*memmap)(struct cdev*, void **map, int flags);
+ int (*truncate)(struct cdev*, size_t size);
};
#define MAX_PARTUUID_STR sizeof("00112233-4455-6677-8899-AABBCCDDEEFF")
--
1.9.1
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