From: Teresa Remmet <t.remmet@phytec.de>
To: barebox@lists.infradead.org
Subject: [PATCH 3/6] ubi: Add truncate callback
Date: Fri, 25 Nov 2016 09:06:04 +0100 [thread overview]
Message-ID: <1480061167-21590-4-git-send-email-t.remmet@phytec.de> (raw)
In-Reply-To: <1480061167-21590-1-git-send-email-t.remmet@phytec.de>
The size of static ubi volumes changes depending on the content.
Add truncate callback to handle resizes.
Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
---
drivers/mtd/ubi/barebox.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/mtd/ubi/barebox.c b/drivers/mtd/ubi/barebox.c
index 329cf45..2ad731a 100644
--- a/drivers/mtd/ubi/barebox.c
+++ b/drivers/mtd/ubi/barebox.c
@@ -162,6 +162,21 @@ static loff_t ubi_volume_cdev_lseek(struct cdev *cdev, loff_t ofs)
return ofs;
}
+static int ubi_volume_cdev_truncate(struct cdev *cdev, size_t size)
+{
+ struct ubi_volume_cdev_priv *priv = cdev->priv;
+ struct ubi_device *ubi = priv->ubi;
+ struct ubi_volume *vol = priv->vol;
+ uint64_t rsvd_bytes;
+
+ rsvd_bytes = (long long)vol->reserved_pebs *
+ ubi->leb_size - vol->data_pad;
+ if (size > rsvd_bytes)
+ return -ENOSPC;
+
+ return 0;
+}
+
static int ubi_volume_cdev_ioctl(struct cdev *cdev, int cmd, void *buf)
{
struct ubi_volume_cdev_priv *priv = cdev->priv;
@@ -210,6 +225,7 @@ static struct file_operations ubi_volume_fops = {
.write = ubi_volume_cdev_write,
.lseek = ubi_volume_cdev_lseek,
.ioctl = ubi_volume_cdev_ioctl,
+ .truncate = ubi_volume_cdev_truncate,
};
int ubi_volume_cdev_add(struct ubi_device *ubi, struct ubi_volume *vol)
--
1.9.1
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next prev parent reply other threads:[~2016-11-25 8:06 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-25 8:06 [PATCH 0/6] ubi: remove character device flag from static volumes Teresa Remmet
2016-11-25 8:06 ` [PATCH 1/6] libfile: copy_file: Only open regular files with O_TRUNC Teresa Remmet
2016-11-25 8:06 ` [PATCH 2/6] devfs: Add optional truncate callback for device files Teresa Remmet
2016-11-25 8:06 ` Teresa Remmet [this message]
2016-11-25 8:06 ` [PATCH 4/6] fs: Remove O_TRUNC check for devices when open files Teresa Remmet
2016-11-25 8:06 ` [PATCH 5/6] commands: ubi: ubiupdatevol: Open device with O_TRUNC Teresa Remmet
2016-11-25 8:06 ` [PATCH 6/6] ubi: barebox: Remove character device flag from static volumes Teresa Remmet
2016-12-07 20:13 ` [PATCH 0/6] ubi: remove " Sascha Hauer
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