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authorLars Ellenberg <lars.ellenberg@linbit.com>2014-05-19 11:52:02 +0400
committerPhilipp Reisner <philipp.reisner@linbit.com>2014-07-10 20:35:22 +0400
commit1e39152fea2dccd1af6479aa1a036201886f0743 (patch)
treea5f27c4adf21b06de70fea027b212666d3424080 /drivers/block
parent193cb00ce377fd672526b5ad065c4de52f429ea1 (diff)
downloadlinux-1e39152fea2dccd1af6479aa1a036201886f0743.tar.xz
drbd: implicitly truncate cpu-mask
Don't error out with misleading "out of memory" if the cpu-mask has more bits set than there are CPUs. Just truncate to nr_cpu_ids implicitly. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/drbd/drbd_main.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 9712bcc8e069..9b465bb68487 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2541,6 +2541,20 @@ int set_resource_options(struct drbd_resource *resource, struct res_opts *res_op
if (nr_cpu_ids > 1 && res_opts->cpu_mask[0] != 0) {
err = bitmap_parse(res_opts->cpu_mask, DRBD_CPU_MASK_SIZE,
cpumask_bits(new_cpu_mask), nr_cpu_ids);
+ if (err == -EOVERFLOW) {
+ /* So what. mask it out. */
+ cpumask_var_t tmp_cpu_mask;
+ if (zalloc_cpumask_var(&tmp_cpu_mask, GFP_KERNEL)) {
+ cpumask_setall(tmp_cpu_mask);
+ cpumask_and(new_cpu_mask, new_cpu_mask, tmp_cpu_mask);
+ drbd_warn(resource, "Overflow in bitmap_parse(%.12s%s), truncating to %u bits\n",
+ res_opts->cpu_mask,
+ strlen(res_opts->cpu_mask) > 12 ? "..." : "",
+ nr_cpu_ids);
+ free_cpumask_var(tmp_cpu_mask);
+ err = 0;
+ }
+ }
if (err) {
drbd_warn(resource, "bitmap_parse() failed with %d\n", err);
/* retcode = ERR_CPU_MASK_PARSE; */