diff options
Diffstat (limited to 'fs/btrfs/super.c')
| -rw-r--r-- | fs/btrfs/super.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 0f99336c37eb..404051bf5cba 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1702,6 +1702,8 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data) } if (btrfs_super_log_root(fs_info->super_copy) != 0) { + btrfs_warn(fs_info, + "mount required to replay tree-log, cannot remount read-write"); ret = -EINVAL; goto restore; } @@ -1978,6 +1980,7 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf) struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv; int ret; u64 thresh = 0; + int mixed = 0; /* * holding chunk_muext to avoid allocating new chunks, holding @@ -2003,8 +2006,17 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf) } } } - if (found->flags & BTRFS_BLOCK_GROUP_METADATA) - total_free_meta += found->disk_total - found->disk_used; + + /* + * Metadata in mixed block goup profiles are accounted in data + */ + if (!mixed && found->flags & BTRFS_BLOCK_GROUP_METADATA) { + if (found->flags & BTRFS_BLOCK_GROUP_DATA) + mixed = 1; + else + total_free_meta += found->disk_total - + found->disk_used; + } total_used += found->disk_used; } @@ -2042,7 +2054,15 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf) */ thresh = 4 * 1024 * 1024; - if (total_free_meta - thresh < block_rsv->size) + /* + * We only want to claim there's no available space if we can no longer + * allocate chunks for our metadata profile and our global reserve will + * not fit in the free metadata space. If we aren't ->full then we + * still can allocate chunks and thus are fine using the currently + * calculated f_bavail. + */ + if (!mixed && block_rsv->space_info->full && + total_free_meta - thresh < block_rsv->size) buf->f_bavail = 0; buf->f_type = BTRFS_SUPER_MAGIC; |