From: Markus Pargmann <mpa@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH v2 5/8] ubi: Helper to iterate over all ubi volumes
Date: Thu, 10 Mar 2016 09:29:57 +0100 [thread overview]
Message-ID: <1457598600-10669-5-git-send-email-mpa@pengutronix.de> (raw)
In-Reply-To: <1457598600-10669-1-git-send-email-mpa@pengutronix.de>
To find all the ubi volume ids on a given UBI, we need a helper. The
added functions allow to use ubi_volume_for_each() to get each volume id
of a UBI.
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
---
drivers/mtd/ubi/kapi.c | 42 ++++++++++++++++++++++++++++++++++++++++++
include/linux/mtd/ubi.h | 11 +++++++++++
2 files changed, 53 insertions(+)
diff --git a/drivers/mtd/ubi/kapi.c b/drivers/mtd/ubi/kapi.c
index c2e58e865753..f3b0f0d85d84 100644
--- a/drivers/mtd/ubi/kapi.c
+++ b/drivers/mtd/ubi/kapi.c
@@ -308,6 +308,48 @@ void ubi_close_volume(struct ubi_volume_desc *desc)
}
EXPORT_SYMBOL_GPL(ubi_close_volume);
+int ubi_volume_first(int ubi_num, struct ubi_device **ubi, int *vol_id)
+{
+ int i;
+
+ /* We keep the device until the last call of ubi_volume_next
+ * or ubi_volume_abort */
+ *ubi = ubi_get_device(ubi_num);
+ if (!*ubi)
+ return -ENODEV;
+
+ for (i = 0; i < (*ubi)->vtbl_slots; ++i) {
+ if ((*ubi)->volumes[i]) {
+ *vol_id = i;
+ return 0;
+ }
+ }
+
+ ubi_put_device(*ubi);
+ return -ENOENT;
+}
+
+int ubi_volume_next(struct ubi_device *ubi, int *vol_id)
+{
+ int i;
+
+ for (i = *vol_id + 1; i < ubi->vtbl_slots; ++i) {
+ if (ubi->volumes[i]) {
+ *vol_id = i;
+ return 0;
+ }
+ }
+
+ ubi_put_device(ubi);
+
+ return -ENOENT;
+}
+
+void ubi_volume_abort(struct ubi_device *ubi)
+{
+ ubi_put_device(ubi);
+}
+
struct cdev *ubi_volume_get_cdev(struct ubi_volume_desc *vol)
{
return &vol->vol->cdev;
diff --git a/include/linux/mtd/ubi.h b/include/linux/mtd/ubi.h
index 0725b04f9dfd..344842e4ed97 100644
--- a/include/linux/mtd/ubi.h
+++ b/include/linux/mtd/ubi.h
@@ -220,6 +220,17 @@ int ubi_flush(int ubi_num, int vol_id, int lnum);
struct cdev *ubi_volume_get_cdev(struct ubi_volume_desc *vol);
+struct ubi_device;
+int ubi_volume_first(int ubi_num, struct ubi_device **ubi, int *vol_id);
+int ubi_volume_next(struct ubi_device *ubi, int *vol_id);
+void ubi_volume_abort(struct ubi_device *ubi);
+
+#define ubi_volume_for_each(ubi_num, ubi, vol_id, ret) \
+ for (ret = ubi_volume_first(ubi_num, &(ubi), &(vol_id)); \
+ !ret; \
+ ret = ubi_volume_next(ubi, &(vol_id)))
+
+
/*
* This function is the same as the 'ubi_leb_read()' function, but it does not
* provide the checking capability.
--
2.7.0
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next prev parent reply other threads:[~2016-03-10 8:30 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-10 8:29 [PATCH v2 1/8] fs: Add for_each_fs_device_safe() Markus Pargmann
2016-03-10 8:29 ` [PATCH v2 2/8] fs: umount based on device path and mount path Markus Pargmann
2016-03-10 8:29 ` [PATCH v2 3/8] ubi: Add getter ubi_volume_get_cdev() Markus Pargmann
2016-03-10 8:29 ` [PATCH v2 4/8] ubi: Add helper to map a mtd device to a ubi number Markus Pargmann
2016-03-10 8:29 ` Markus Pargmann [this message]
2016-03-10 8:29 ` [PATCH v2 6/8] ubi: Add function to detach a UBI by using mtd_info Markus Pargmann
2016-03-10 8:29 ` [PATCH v2 7/8] ubi: Let ubidetach umount all filesystems before detaching Markus Pargmann
2016-03-14 7:32 ` Sascha Hauer
2016-03-10 8:30 ` [PATCH v2 8/8] ubiformat: Cleanly umount and detach the ubi before formating Markus Pargmann
2016-03-14 7:41 ` Sascha Hauer
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