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| author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2014-05-19 11:52:02 +0400 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2014-07-10 20:35:22 +0400 |
| commit | 1e39152fea2dccd1af6479aa1a036201886f0743 (patch) | |
| tree | a5f27c4adf21b06de70fea027b212666d3424080 /drivers/block | |
| parent | 193cb00ce377fd672526b5ad065c4de52f429ea1 (diff) | |
| download | linux-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.c | 14 |
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; */ |