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| author | Liu Bo <bo.li.liu@oracle.com> | 2017-03-14 13:33:59 -0700 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-04-18 14:07:25 +0200 |
| commit | 6fad823f4998cdff49c443891a0acc9f1bc289f9 (patch) | |
| tree | 4af0d1f863fa09a4880c8883e84e4869e0cb7bcd /fs/btrfs | |
| parent | 73c0f228250ff7fc1d662b64123f2aea9d04ca7e (diff) | |
| download | linux-6fad823f4998cdff49c443891a0acc9f1bc289f9.tar.gz linux-6fad823f4998cdff49c443891a0acc9f1bc289f9.tar.bz2 linux-6fad823f4998cdff49c443891a0acc9f1bc289f9.zip | |
Btrfs: do not add extra mirror when dev_replace target dev is not available
With this, we can avoid allocating memory for dev replace copies if the
target dev is not available.
Reviewed-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/volumes.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index f27f9cebce24..8cc40268c50c 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -5157,7 +5157,8 @@ int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len) free_extent_map(em); btrfs_dev_replace_lock(&fs_info->dev_replace, 0); - if (btrfs_dev_replace_is_ongoing(&fs_info->dev_replace)) + if (btrfs_dev_replace_is_ongoing(&fs_info->dev_replace) && + fs_info->dev_replace.tgtdev) ret++; btrfs_dev_replace_unlock(&fs_info->dev_replace, 0); @@ -5845,7 +5846,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, } num_alloc_stripes = num_stripes; - if (dev_replace_is_ongoing) { + if (dev_replace_is_ongoing && dev_replace->tgtdev != NULL) { if (op == BTRFS_MAP_WRITE) num_alloc_stripes <<= 1; if (op == BTRFS_MAP_GET_READ_MIRRORS) @@ -5858,7 +5859,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, ret = -ENOMEM; goto out; } - if (dev_replace_is_ongoing) + if (dev_replace_is_ongoing && dev_replace->tgtdev != NULL) bbio->tgtdev_map = (int *)(bbio->stripes + num_alloc_stripes); /* build raid_map */ |