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dm snapshot: use DMEMIT macro for status 

Use DMEMIT in place of snprintf.  This makes it easier later when
other modules are helping to populate our status output.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Jonathan Brassow 2009-04-02 19:55:34 +01:00 committed by Alasdair G Kergon
parent ccc45ea8ae
commit 2e4a31df2b
1 changed files with 10 additions and 9 deletions
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19
drivers/md/dm-snap.c
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@ -1214,24 +1214,25 @@ static void snapshot_resume(struct dm_target *ti)
static int snapshot_status(struct dm_target *ti, status_type_t type,
char *result, unsigned int maxlen)
{
unsigned sz = 0;
struct dm_snapshot *snap = ti->private;
switch (type) {
case STATUSTYPE_INFO:
if (!snap->valid)
snprintf(result, maxlen, "Invalid");
DMEMIT("Invalid");
else {
if (snap->store->type->fraction_full) {
sector_t numerator, denominator;
snap->store->type->fraction_full(snap->store,
&numerator,
&denominator);
snprintf(result, maxlen, "%llu/%llu",
(unsigned long long)numerator,
(unsigned long long)denominator);
DMEMIT("%llu/%llu",
(unsigned long long)numerator,
(unsigned long long)denominator);
}
else
snprintf(result, maxlen, "Unknown");
DMEMIT("Unknown");
}
break;
@ -1241,10 +1242,10 @@ static int snapshot_status(struct dm_target *ti, status_type_t type,
* to make private copies if the output is to
* make sense.
*/
snprintf(result, maxlen, "%s %s %s %llu",
snap->origin->name, snap->store->cow->name,
snap->store->type->name,
(unsigned long long)snap->store->chunk_size);
DMEMIT("%s", snap->origin->name);
DMEMIT(" %s %s %llu", snap->store->cow->name,
snap->store->type->name,
(unsigned long long)snap->store->chunk_size);
break;
}