diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/drbd/drbd_receiver.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index 2fcc3af03bd8..5626c5babc3f 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -3657,7 +3657,7 @@ static int receive_sizes(struct drbd_connection *connection, struct packet_info struct drbd_device *device; struct p_sizes *p = pi->data; enum determine_dev_size dd = DS_UNCHANGED; - sector_t p_size, p_usize, my_usize; + sector_t p_size, p_usize, p_csize, my_usize; int ldsc = 0; /* local disk size changed */ enum dds_flags ddsf; @@ -3668,6 +3668,7 @@ static int receive_sizes(struct drbd_connection *connection, struct packet_info p_size = be64_to_cpu(p->d_size); p_usize = be64_to_cpu(p->u_size); + p_csize = be64_to_cpu(p->c_size); /* just store the peer's disk size for now. * we still need to figure out whether we accept that. */ @@ -3742,9 +3743,21 @@ static int receive_sizes(struct drbd_connection *connection, struct packet_info return -EIO; drbd_md_sync(device); } else { - /* I am diskless, need to accept the peer's size. */ + /* + * I am diskless, need to accept the peer's *current* size. + * I must NOT accept the peers backing disk size, + * it may have been larger than mine all along... + * + * At this point, the peer knows more about my disk, or at + * least about what we last agreed upon, than myself. + * So if his c_size is less than his d_size, the most likely + * reason is that *my* d_size was smaller last time we checked. + * + * However, if he sends a zero current size, + * take his (user-capped or) backing disk size anyways. + */ drbd_reconsider_max_bio_size(device, NULL); - drbd_set_my_capacity(device, p_size); + drbd_set_my_capacity(device, p_csize ?: p_usize ?: p_size); } if (get_ldev(device)) { |
