Hi,
On 01-09-15 22:03, Stephen Warren wrote:
On 08/22/2015 11:04 AM, Hans de Goede wrote:
Add generic fs support, so that commands like ls, load and test -e can be
used on ubifs.
@@ -530,6 +531,28 @@ int get_device_and_partition(const char *ifname, const
char *dev_part_str,
return 0;
}
+#ifdef CONFIG_CMD_UBIFS
+ /*
+ * Special-case ubi, ubi goes through a mtd, rathen then through
+ * a regular block device.
+ */
+ if (0 == strcmp(ifname, "ubi")) {
+ if (!ubifs_mounted) {
+ printf("UBIFS not mounted, use ubifsmount to mount volume
first!\n");
+ return -1;
+ }
+
+ *dev_desc = NULL;
+ memset(info, 0, sizeof(*info));
+ strcpy((char *)info->type, BOOT_PART_TYPE);
+ strcpy((char *)info->name, "UBI");
+#ifdef CONFIG_PARTITION_UUIDS
+ info->uuid[0] = 0;
+#endif
+ return 0;
+ }
+#endif
We now have two paths through this function that can "Return" a NULL
dev_desc. This makes it impossible for sandbox and ubifs to successfully
co-exist in the same U-Boot binary, since the sandbox and ubifs fs probe
functions won't be able to tell if "hostfs" or "ubifs" was passed to
get_device_and_partition(). Perhaps there's no ubifs support in sandbox
right now, so there's no issue?
Right, ubifs is for raw nand, sandbox is for access to a host filesystem
in a sandbox build. I basically never expect both CONFIG_CMD_UBIFS and
CONFIG_SANDBOX to be set at the same time. I'll add a pre-processor
check + #error to enforce this in the next version.
If this is an issue that needs to be solved now, I think the best
solution would be for the two special cases in
get_device_and_partition() to "return" a real dev_desc rather than NULL.
Since there's nothing meaningful to put there, how about returning a
hard-coded value that can then be checked in the fs probe functions to
make sure it matches:
get_device_and_partition():
if (hostfs) {
...
*dev_desc = &hostfs_fake_dev_desc;
...
return 0;
}
if (ubi) {
...
*dev_desc = &ubifs_fake_dev_desc;
...
return 0;
}
ubifs_set_blk_dev():
if (rbdd != &ubifs_fake_dev_desc)
return -1;
...
return 0;
... that said, I wonder if the ubifs special case in
get_device_and_partition() shouldn't actually perform the ubifs_mount()
call itself, based on the user-supplied parameters?
That is not possible as the supplied parameter for a generic fs call
is a device index + partition number, where as ubi volumes use
names (strings).
Regards,
Hans
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