drbd: Implemented new commands to create/delete connections/minors
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_main.c b/drivers/block/drbd/drbd_main.c
index 2bfd630..ec7d0d9 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -614,13 +614,16 @@
return thi ? thi->name : task->comm;
}
-#ifdef CONFIG_SMP
int conn_lowest_minor(struct drbd_tconn *tconn)
{
int minor = 0;
- idr_get_next(&tconn->volumes, &minor);
+
+ if (!idr_get_next(&tconn->volumes, &minor))
+ return -1;
return minor;
}
+
+#ifdef CONFIG_SMP
/**
* drbd_calc_cpu_mask() - Generate CPU masks, spread over all CPUs
* @mdev: DRBD device.
@@ -2078,15 +2081,16 @@
dev_err(DEV, "%d EEs in net list found!\n", rr);
}
-/* caution. no locking.
- * currently only used from module cleanup code. */
-static void drbd_delete_device(unsigned int minor)
+/* caution. no locking. */
+void drbd_delete_device(unsigned int minor)
{
struct drbd_conf *mdev = minor_to_mdev(minor);
if (!mdev)
return;
+ idr_remove(&mdev->tconn->volumes, minor);
+
/* paranoia asserts */
D_ASSERT(mdev->open_cnt == 0);
D_ASSERT(list_empty(&mdev->tconn->data.work.q));
@@ -2101,7 +2105,6 @@
bdput(mdev->this_bdev);
drbd_free_resources(mdev);
- drbd_free_tconn(mdev->tconn);
drbd_release_ee_lists(mdev);
@@ -2223,6 +2226,9 @@
if (!tconn->name)
goto fail;
+ if (!zalloc_cpumask_var(&tconn->cpu_mask, GFP_KERNEL))
+ goto fail;
+
if (!tl_init(tconn))
goto fail;
@@ -2252,6 +2258,7 @@
fail:
tl_cleanup(tconn);
+ free_cpumask_var(tconn->cpu_mask);
kfree(tconn->name);
kfree(tconn);
@@ -2265,6 +2272,7 @@
write_unlock_irq(&global_state_lock);
idr_destroy(&tconn->volumes);
+ free_cpumask_var(tconn->cpu_mask);
kfree(tconn->name);
kfree(tconn->int_dig_out);
kfree(tconn->int_dig_in);
@@ -2272,32 +2280,31 @@
kfree(tconn);
}
-struct drbd_conf *drbd_new_device(unsigned int minor)
+enum drbd_ret_code conn_new_minor(struct drbd_tconn *tconn, unsigned int minor, int vnr)
{
struct drbd_conf *mdev;
struct gendisk *disk;
struct request_queue *q;
- char conn_name[9]; /* drbd1234N */
- int vnr;
+ int vnr_got = vnr;
+
+ mdev = minor_to_mdev(minor);
+ if (mdev)
+ return ERR_MINOR_EXISTS;
/* GFP_KERNEL, we are outside of all write-out paths */
mdev = kzalloc(sizeof(struct drbd_conf), GFP_KERNEL);
if (!mdev)
- return NULL;
- sprintf(conn_name, "drbd%d", minor);
- mdev->tconn = drbd_new_tconn(conn_name);
- if (!mdev->tconn)
- goto out_no_tconn;
- if (!idr_pre_get(&mdev->tconn->volumes, GFP_KERNEL))
- goto out_no_cpumask;
- if (idr_get_new(&mdev->tconn->volumes, mdev, &vnr))
- goto out_no_cpumask;
- if (vnr != 0) {
- dev_err(DEV, "vnr = %d\n", vnr);
- goto out_no_cpumask;
+ return ERR_NOMEM;
+
+ mdev->tconn = tconn;
+ if (!idr_pre_get(&tconn->volumes, GFP_KERNEL))
+ goto out_no_idr;
+ if (idr_get_new(&tconn->volumes, mdev, &vnr_got))
+ goto out_no_idr;
+ if (vnr_got != vnr) {
+ dev_err(DEV, "vnr_got (%d) != vnr (%d)\n", vnr_got, vnr);
+ goto out_no_q;
}
- if (!zalloc_cpumask_var(&mdev->tconn->cpu_mask, GFP_KERNEL))
- goto out_no_cpumask;
mdev->minor = minor;
@@ -2354,7 +2361,10 @@
INIT_LIST_HEAD(&mdev->current_epoch->list);
mdev->epochs = 1;
- return mdev;
+ minor_table[minor] = mdev;
+ add_disk(disk);
+
+ return NO_ERROR;
/* out_whatever_else:
kfree(mdev->current_epoch); */
@@ -2367,12 +2377,10 @@
out_no_disk:
blk_cleanup_queue(q);
out_no_q:
- free_cpumask_var(mdev->tconn->cpu_mask);
-out_no_cpumask:
- drbd_free_tconn(mdev->tconn);
-out_no_tconn:
+ idr_remove(&tconn->volumes, vnr_got);
+out_no_idr:
kfree(mdev);
- return NULL;
+ return ERR_NOMEM;
}
/* counterpart of drbd_new_device.
