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dm thin: set pool read-only if breaking_sharing fails block allocation 

break_sharing() now handles an arbitrary alloc_data_block() error
the same way as provision_block(): marks pool read-only and errors the
cell.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
hifive-unleashed-5.1
Mike Snitzer 2013-08-21 17:40:11 -04:00
parent 4fa5971a69
commit d6fc204201
1 changed files with 4 additions and 2 deletions
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6
drivers/md/dm-thin.c
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@ -1086,6 +1086,7 @@ static void break_sharing(struct thin_c *tc, struct bio *bio, dm_block_t block,
{ {
int r; int r;
dm_block_t data_block; dm_block_t data_block;
struct pool *pool = tc->pool;
r = alloc_data_block(tc, &data_block); r = alloc_data_block(tc, &data_block);
switch (r) { switch (r) {
@ -1095,13 +1096,14 @@ static void break_sharing(struct thin_c *tc, struct bio *bio, dm_block_t block,
break; break;
case -ENOSPC: case -ENOSPC:
no_space(tc->pool, cell); no_space(pool, cell);
break; break;
default: default:
DMERR_LIMIT("%s: alloc_data_block() failed: error = %d", DMERR_LIMIT("%s: alloc_data_block() failed: error = %d",
__func__, r); __func__, r);
cell_error(tc->pool, cell); set_pool_mode(pool, PM_READ_ONLY);
cell_error(pool, cell);
break; break;
} }
} }