The barebox,environment binding documentation notes following for
the device-path property's second string:
> <partname> can be the label for MTD partitions, the number for DOS
> partitions (beginning with 0) or the name for GPT partitions.
This doesn't work currently because the named partitions are realized as
symlinks and those aren't searched by device_find_partition.
Fix this by having symlinks feature an appropriate partname if the cdev
they link at has one and then have device_find_partition search those as
well.
Signed-off-by: Ahmad Fatoum <a.fat...@pengutronix.de>
---
fs/devfs-core.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/fs/devfs-core.c b/fs/devfs-core.c
index 2b93a951f269..258bb2dbaaee 100644
--- a/fs/devfs-core.c
+++ b/fs/devfs-core.c
@@ -122,10 +122,17 @@ struct cdev *device_find_partition(struct device_d *dev,
const char *name)
struct device_d *child;
list_for_each_entry(cdev, &dev->cdevs, devices_list) {
+ struct cdev *cdevl;
+
if (!cdev->partname)
continue;
if (!strcmp(cdev->partname, name))
return cdev;
+
+ list_for_each_entry(cdevl, &cdev->links, link_entry) {
+ if (!strcmp(cdevl->partname, name))
+ return cdev_readlink(cdevl);
+ }
}
device_for_each_child(dev, child) {
@@ -252,6 +259,20 @@ int devfs_create_link(struct cdev *cdev, const char *name)
new = xzalloc(sizeof(*new));
new->name = xstrdup(name);
new->link = cdev;
+
+ if (cdev->partname) {
+ size_t partnameoff = 0;
+
+ if (cdev->master) {
+ size_t masterlen = strlen(cdev->master->name);
+
+ if (!strncmp(name, cdev->master->name, masterlen))
+ partnameoff += masterlen + 1;
+ }
+
+ new->partname = xstrdup(name + partnameoff);
+ }
+
INIT_LIST_HEAD(&new->links);
list_add_tail(&new->list, &cdev_list);
list_add_tail(&new->link_entry, &cdev->links);
--
2.23.0
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