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| author | Michael Olbrich <m.olbrich@pengutronix.de> | 2015-07-17 21:22:39 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2015-07-27 07:23:17 +0200 |
| commit | be2edd99c02c3790ae3f1d5c2e109d66df0c28a3 (patch) | |
| tree | 2ee7c8b5051105c3a27476aae3c34cc75515cb7f | |
| parent | 55da0cf13eda4a29ce6d2aa58b3de6448a806e9e (diff) | |
| download | barebox-be2edd99c02c3790ae3f1d5c2e109d66df0c28a3.tar.gz barebox-be2edd99c02c3790ae3f1d5c2e109d66df0c28a3.tar.xz | |
efi: add helper to get the GPT partition UUID for a device
Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | common/efi-devicepath.c | 30 | ||||
| -rw-r--r-- | include/efi.h | 1 |
2 files changed, 31 insertions, 0 deletions
diff --git a/common/efi-devicepath.c b/common/efi-devicepath.c index a53c6d2e8b..54c2f4e3c5 100644 --- a/common/efi-devicepath.c +++ b/common/efi-devicepath.c @@ -1383,3 +1383,33 @@ u8 device_path_to_type(struct efi_device_path *dev_path) return device_path_type(dev_path); } + +char *device_path_to_partuuid(struct efi_device_path *dev_path) +{ + struct efi_device_path *dev_path_node; + struct harddrive_device_path *hd; + char *str = NULL;; + + dev_path = unpack_device_path(dev_path); + + for (dev_path_node = dev_path; !is_device_path_end(dev_path_node); + dev_path_node = next_device_path_node(dev_path_node)) { + + if (device_path_type(dev_path_node) != MEDIA_DEVICE_PATH) + continue; + + if (dev_path_node->sub_type != MEDIA_HARDDRIVE_DP) + continue; + + hd = (struct harddrive_device_path *)dev_path_node; + + if (hd->signature_type != SIGNATURE_TYPE_GUID) + continue; + + str = xasprintf("%pUl", (efi_guid_t *)&(hd->signature[0])); + break; + } + + return str; +} + diff --git a/include/efi.h b/include/efi.h index e79a407bc2..b6ee42b3fd 100644 --- a/include/efi.h +++ b/include/efi.h @@ -624,6 +624,7 @@ static inline int efi_compare_guid(efi_guid_t *a, efi_guid_t *b) char *device_path_to_str(struct efi_device_path *dev_path); u8 device_path_to_type(struct efi_device_path *dev_path); +char *device_path_to_partuuid(struct efi_device_path *dev_path); const char *efi_guid_string(efi_guid_t *g); |