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-rw-r--r--fs/btrfs/volumes.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index a595f8775c37..46f9a208723d 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -863,6 +863,7 @@ int find_free_dev_extent(struct btrfs_trans_handle *trans,
max_hole_start = search_start;
max_hole_size = 0;
+ hole_size = 0;
if (search_start >= search_end) {
ret = -ENOSPC;
@@ -945,7 +946,14 @@ next:
cond_resched();
}
- hole_size = search_end- search_start;
+ /*
+ * At this point, search_start should be the end of
+ * allocated dev extents, and when shrinking the device,
+ * search_end may be smaller than search_start.
+ */
+ if (search_end > search_start)
+ hole_size = search_end - search_start;
+
if (hole_size > max_hole_size) {
max_hole_start = search_start;
max_hole_size = hole_size;
@@ -2447,9 +2455,10 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
total_avail = device->total_bytes - device->bytes_used;
else
total_avail = 0;
- /* avail is off by max(alloc_start, 1MB), but that is the same
- * for all devices, so it doesn't hurt the sorting later on
- */
+
+ /* If there is no space on this device, skip it. */
+ if (total_avail == 0)
+ continue;
ret = find_free_dev_extent(trans, device,
max_stripe_size * dev_stripes,