}
}
-/*
- * This function checks if the metadata layout is valid and error free
- */
-static int arena_is_valid(struct arena_info *arena, struct btt_sb *super,
- u8 *uuid, u32 lbasize)
-{
- u64 checksum;
-
- if (memcmp(super->uuid, uuid, 16))
- return 0;
-
- checksum = le64_to_cpu(super->checksum);
- super->checksum = 0;
- if (checksum != nd_btt_sb_checksum(super))
- return 0;
- super->checksum = cpu_to_le64(checksum);
-
- if (lbasize != le32_to_cpu(super->external_lbasize))
- return 0;
-
- /* TODO: figure out action for this */
- if ((le32_to_cpu(super->flags) & IB_FLAG_ERROR_MASK) != 0)
- dev_info(to_dev(arena), "Found arena with an error flag\n");
-
- return 1;
-}
-
/*
* This function reads an existing valid btt superblock and
* populates the corresponding arena_info struct
arena->logoff = arena_off + le64_to_cpu(super->logoff);
arena->info2off = arena_off + le64_to_cpu(super->info2off);
- arena->size = (super->nextoff > 0) ? (le64_to_cpu(super->nextoff)) :
- (arena->info2off - arena->infooff + BTT_PG_SIZE);
+ arena->size = (le64_to_cpu(super->nextoff) > 0)
+ ? (le64_to_cpu(super->nextoff))
+ : (arena->info2off - arena->infooff + BTT_PG_SIZE);
arena->flags = le32_to_cpu(super->flags);
}
if (ret)
goto out;
- if (!arena_is_valid(arena, super, btt->nd_btt->uuid,
- btt->lbasize)) {
+ if (!nd_btt_arena_is_valid(btt->nd_btt, super)) {
if (remaining == btt->rawsize) {
btt->init_state = INIT_NOTFOUND;
dev_info(to_dev(arena), "No existing arenas\n");
* It is only called for an uninitialized arena when a write
* to that arena occurs for the first time.
*/
-static int btt_arena_write_layout(struct arena_info *arena, u8 *uuid)
+static int btt_arena_write_layout(struct arena_info *arena)
{
int ret;
+ u64 sum;
struct btt_sb *super;
+ struct nd_btt *nd_btt = arena->nd_btt;
+ const u8 *parent_uuid = nd_dev_to_uuid(&nd_btt->ndns->dev);
ret = btt_map_init(arena);
if (ret)
return -ENOMEM;
strncpy(super->signature, BTT_SIG, BTT_SIG_LEN);
- memcpy(super->uuid, uuid, 16);
+ memcpy(super->uuid, nd_btt->uuid, 16);
+ memcpy(super->parent_uuid, parent_uuid, 16);
super->flags = cpu_to_le32(arena->flags);
super->version_major = cpu_to_le16(arena->version_major);
super->version_minor = cpu_to_le16(arena->version_minor);
super->info2off = cpu_to_le64(arena->info2off - arena->infooff);
super->flags = 0;
- super->checksum = cpu_to_le64(nd_btt_sb_checksum(super));
+ sum = nd_sb_checksum((struct nd_gen_sb *) super);
+ super->checksum = cpu_to_le64(sum);
ret = btt_info_write(arena, super);
mutex_lock(&btt->init_lock);
list_for_each_entry(arena, &btt->arena_list, list) {
- ret = btt_arena_write_layout(arena, btt->nd_btt->uuid);
+ ret = btt_arena_write_layout(arena);
if (ret)
goto unlock;
{
int rc;
- BUILD_BUG_ON(sizeof(struct btt_sb) != SZ_4K);
-
btt_major = register_blkdev(0, "btt");
if (btt_major < 0)
return btt_major;