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dm exception store: use chunk_t for_areas

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Change uint32_t into chunk_t to remove 32-bit limitation on the
number of chunks on systems with 64-bit sector numbers.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Mikulas Patocka 2008-10-10 13:37:01 +01:00 committed by Alasdair G Kergon
parent a481db7846
commit fd14acf6fc
1 changed files with 10 additions and 8 deletions
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18
drivers/md/dm-exception-store.c
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@ -108,12 +108,12 @@ struct pstore {
* Used to keep track of which metadata area the data in
* 'chunk' refers to.
*/
uint32_t current_area;
chunk_t current_area;
/*
* The next free chunk for an exception.
*/
uint32_t next_free;
chunk_t next_free;
/*
* The index of next free exception in the current
@ -175,7 +175,7 @@ static void do_metadata(struct work_struct *work)
/*
* Read or write a chunk aligned and sized block of data from a device.
*/
static int chunk_io(struct pstore *ps, uint32_t chunk, int rw, int metadata)
static int chunk_io(struct pstore *ps, chunk_t chunk, int rw, int metadata)
{
struct dm_io_region where = {
.bdev = ps->snap->cow->bdev,
@ -220,10 +220,10 @@ static chunk_t area_location(struct pstore *ps, chunk_t area)
* Read or write a metadata area. Remembering to skip the first
* chunk which holds the header.
*/
static int area_io(struct pstore *ps, uint32_t area, int rw)
static int area_io(struct pstore *ps, chunk_t area, int rw)
{
int r;
uint32_t chunk;
chunk_t chunk;
chunk = area_location(ps, area);
@ -235,7 +235,7 @@ static int area_io(struct pstore *ps, uint32_t area, int rw)
return 0;
}
static int zero_area(struct pstore *ps, uint32_t area)
static int zero_area(struct pstore *ps, chunk_t area)
{
memset(ps->area, 0, ps->snap->chunk_size << SECTOR_SHIFT);
return area_io(ps, area, WRITE);
@ -411,7 +411,7 @@ static int insert_exceptions(struct pstore *ps, int *full)
static int read_exceptions(struct pstore *ps)
{
uint32_t area;
chunk_t area;
int r, full = 1;
/*
@ -524,6 +524,7 @@ static int persistent_prepare(struct exception_store *store,
{
struct pstore *ps = get_info(store);
uint32_t stride;
chunk_t next_free;
sector_t size = get_dev_size(store->snap->cow->bdev);
/* Is there enough room ? */
@ -537,7 +538,8 @@ static int persistent_prepare(struct exception_store *store,
* into account the location of the metadata chunks.
*/
stride = (ps->exceptions_per_area + 1);
if ((++ps->next_free % stride) == 1)
next_free = ++ps->next_free;
if (sector_div(next_free, stride) == 1)
ps->next_free++;
atomic_inc(&ps->pending_count);