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Diffstat (limited to 'fs/btrfs/extent-tree.c')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index a400951e8678..689d25ac6a68 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -2042,6 +2042,11 @@ int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr, struct btrfs_bio *bbio = NULL; + /* + * Avoid races with device replace and make sure our bbio has devices + * associated to its stripes that don't go away while we are discarding. + */ + btrfs_bio_counter_inc_blocked(root->fs_info); /* Tell the block device(s) that the sectors can be discarded */ ret = btrfs_map_block(root->fs_info, REQ_DISCARD, bytenr, &num_bytes, &bbio, 0); @@ -2074,6 +2079,7 @@ int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr, } btrfs_put_bbio(bbio); } + btrfs_bio_counter_dec(root->fs_info); if (actual_bytes) *actual_bytes = discarded_bytes; |