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libnvdimm, btt: clean up internal interfaces 

Consolidate the parameters passed to arena_is_valid into just nd_btt,
and an info block to increase re-usability.

Similarly, btt_arena_write_layout doesn't need to be passed a uuid, as
it can be obtained from arena->nd_btt.

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Vishal Verma 2015-07-29 14:58:07 -06:00 committed by Dan Williams
parent f6ef5a2a50
commit fbde1414ac
1 changed files with 9 additions and 10 deletions
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19
drivers/nvdimm/btt.c
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@ -585,12 +585,11 @@ static void free_arenas(struct btt *btt)
/*
* 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)
static int arena_is_valid(struct nd_btt *nd_btt, struct btt_sb *super)
{
u64 checksum;
if (memcmp(super->uuid, uuid, 16))
if (memcmp(super->uuid, nd_btt->uuid, 16))
return 0;
checksum = le64_to_cpu(super->checksum);
@ -599,12 +598,12 @@ static int arena_is_valid(struct arena_info *arena, struct btt_sb *super,
return 0;
super->checksum = cpu_to_le64(checksum);
if (lbasize != le32_to_cpu(super->external_lbasize))
if (nd_btt->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");
dev_info(&nd_btt->dev, "Found arena with an error flag\n");
return 1;
}
@ -666,8 +665,7 @@ static int discover_arenas(struct btt *btt)
if (ret)
goto out;
if (!arena_is_valid(arena, super, btt->nd_btt->uuid,
btt->lbasize)) {
if (!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");
@ -756,10 +754,11 @@ static int create_arenas(struct btt *btt)
* 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;
struct btt_sb *super;
struct nd_btt *nd_btt = arena->nd_btt;
ret = btt_map_init(arena);
if (ret)
@ -774,7 +773,7 @@ static int btt_arena_write_layout(struct arena_info *arena, u8 *uuid)
return -ENOMEM;
strncpy(super->signature, BTT_SIG, BTT_SIG_LEN);
memcpy(super->uuid, uuid, 16);
memcpy(super->uuid, nd_btt->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);
@ -814,7 +813,7 @@ static int btt_meta_init(struct btt *btt)
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;