gpt: part: Definition and declaration of GPT verification functions

[platform/kernel/u-boot.git] / disk / part_efi.c

diff --git a/disk/part_efi.c b/disk/part_efi.c
index ea9c615..40f0b36 100644 (file)
--- a/disk/part_efi.c
+++ b/disk/part_efi.c
@@ -578,6 +578,116 @@ err:
        return ret;
 }
 
+static void gpt_convert_efi_name_to_char(char *s, efi_char16_t *es, int n)
+{
+       char *ess = (char *)es;
+       int i, j;
+
+       memset(s, '\0', n);
+
+       for (i = 0, j = 0; j < n; i += 2, j++) {
+               s[j] = ess[i];
+               if (!ess[i])
+                       return;
+       }
+}
+
+int gpt_verify_headers(block_dev_desc_t *dev_desc, gpt_header *gpt_head,
+                      gpt_entry **gpt_pte)
+{
+       /*
+        * This function validates AND
+        * fills in the GPT header and PTE
+        */
+       if (is_gpt_valid(dev_desc,
+                        GPT_PRIMARY_PARTITION_TABLE_LBA,
+                        gpt_head, gpt_pte) != 1) {
+               printf("%s: *** ERROR: Invalid GPT ***\n",
+                      __func__);
+               return -1;
+       }
+       if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
+                        gpt_head, gpt_pte) != 1) {
+               printf("%s: *** ERROR: Invalid Backup GPT ***\n",
+                      __func__);
+               return -1;
+       }
+
+       return 0;
+}
+
+int gpt_verify_partitions(block_dev_desc_t *dev_desc,
+                         disk_partition_t *partitions, int parts,
+                         gpt_header *gpt_head, gpt_entry **gpt_pte)
+{
+       char efi_str[PARTNAME_SZ + 1];
+       u64 gpt_part_size;
+       gpt_entry *gpt_e;
+       int ret, i;
+
+       ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte);
+       if (ret)
+               return ret;
+
+       gpt_e = *gpt_pte;
+
+       for (i = 0; i < parts; i++) {
+               if (i == gpt_head->num_partition_entries) {
+                       error("More partitions than allowed!\n");
+                       return -1;
+               }
+
+               /* Check if GPT and ENV partition names match */
+               gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name,
+                                            PARTNAME_SZ + 1);
+
+               debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
+                     __func__, i, efi_str, partitions[i].name);
+
+               if (strncmp(efi_str, (char *)partitions[i].name,
+                           sizeof(partitions->name))) {
+                       error("Partition name: %s does not match %s!\n",
+                             efi_str, (char *)partitions[i].name);
+                       return -1;
+               }
+
+               /* Check if GPT and ENV sizes match */
+               gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) -
+                       le64_to_cpu(gpt_e[i].starting_lba) + 1;
+               debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
+                     gpt_part_size, (u64) partitions[i].size);
+
+               if (le64_to_cpu(gpt_part_size) != partitions[i].size) {
+                       error("Partition %s size: %llu does not match %llu!\n",
+                             efi_str, gpt_part_size, (u64) partitions[i].size);
+                       return -1;
+               }
+
+               /*
+                * Start address is optional - check only if provided
+                * in '$partition' variable
+                */
+               if (!partitions[i].start) {
+                       debug("\n");
+                       continue;
+               }
+
+               /* Check if GPT and ENV start LBAs match */
+               debug("start LBA - GPT: %8llu, ENV: %8llu\n",
+                     le64_to_cpu(gpt_e[i].starting_lba),
+                     (u64) partitions[i].start);
+
+               if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) {
+                       error("Partition %s start: %llu does not match %llu!\n",
+                             efi_str, le64_to_cpu(gpt_e[i].starting_lba),
+                             (u64) partitions[i].start);
+                       return -1;
+               }
+       }
+
+       return 0;
+}
+
 int is_valid_gpt_buf(block_dev_desc_t *dev_desc, void *buf)
 {
        gpt_header *gpt_h;