drbd: drbd_dew_dev_size() gets the user requests disk_size as argument

Preparing RCU for disk_conf

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index 0311dfd..8c7e340 100644 (file)
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -1395,7 +1395,7 @@ extern int drbd_msg_put_info(const char *info);
 extern void drbd_suspend_io(struct drbd_conf *mdev);
 extern void drbd_resume_io(struct drbd_conf *mdev);
 extern char *ppsize(char *buf, unsigned long long size);
-extern sector_t drbd_new_dev_size(struct drbd_conf *, struct drbd_backing_dev *, int);
+extern sector_t drbd_new_dev_size(struct drbd_conf *, struct drbd_backing_dev *, sector_t, int);
 enum determine_dev_size { dev_size_error = -1, unchanged = 0, shrunk = 1, grew = 2 };
 extern enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *, enum dds_flags) __must_hold(local);
 extern void resync_after_online_grow(struct drbd_conf *);

diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 3bad141..761a6b9 100644 (file)
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -775,7 +775,7 @@ void drbd_resume_io(struct drbd_conf *mdev)
 enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags) __must_hold(local)
 {
        sector_t prev_first_sect, prev_size; /* previous meta location */
-       sector_t la_size;
+       sector_t la_size, u_size;
        sector_t size;
        char ppb[10];
 
@@ -803,7 +803,8 @@ enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds
        /* TODO: should only be some assert here, not (re)init... */
        drbd_md_set_sector_offsets(mdev, mdev->ldev);
 
-       size = drbd_new_dev_size(mdev, mdev->ldev, flags & DDSF_FORCED);
+       u_size = mdev->ldev->dc.disk_size;
+       size = drbd_new_dev_size(mdev, mdev->ldev, u_size, flags & DDSF_FORCED);
 
        if (drbd_get_capacity(mdev->this_bdev) != size ||
            drbd_bm_capacity(mdev) != size) {
@@ -866,12 +867,12 @@ out:
 }
 
 sector_t
-drbd_new_dev_size(struct drbd_conf *mdev, struct drbd_backing_dev *bdev, int assume_peer_has_space)
+drbd_new_dev_size(struct drbd_conf *mdev, struct drbd_backing_dev *bdev,
+                 sector_t u_size, int assume_peer_has_space)
 {
        sector_t p_size = mdev->p_size;   /* partner's disk size. */
        sector_t la_size = bdev->md.la_size_sect; /* last agreed size. */
        sector_t m_size; /* my size */
-       sector_t u_size = bdev->dc.disk_size; /* size requested by user. */
        sector_t size = 0;
 
        m_size = drbd_get_max_capacity(bdev);
@@ -1406,7 +1407,7 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
 
        /* Prevent shrinking of consistent devices ! */
        if (drbd_md_test_flag(nbc, MDF_CONSISTENT) &&
-           drbd_new_dev_size(mdev, nbc, 0) < nbc->md.la_size_sect) {
+           drbd_new_dev_size(mdev, nbc, nbc->dc.disk_size, 0) < nbc->md.la_size_sect) {
                dev_warn(DEV, "refusing to truncate a consistent device\n");
                retcode = ERR_DISK_TO_SMALL;
                goto force_diskless_dec;

diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 567d64b..23614e4 100644 (file)
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -3379,7 +3379,7 @@ static int receive_sizes(struct drbd_tconn *tconn, struct packet_info *pi)
 
                /* Never shrink a device with usable data during connect.
                   But allow online shrinking if we are connected. */
-               if (drbd_new_dev_size(mdev, mdev->ldev, 0) <
+               if (drbd_new_dev_size(mdev, mdev->ldev, p_usize, 0) <
                   drbd_get_capacity(mdev->this_bdev) &&
                   mdev->state.disk >= D_OUTDATED &&
                   mdev->state.conn < C_CONNECTED) {