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| author | Wang Shilong <wangsl-fnst@cn.fujitsu.com> | 2013-04-07 10:24:57 (GMT) |
|---|---|---|
| committer | Josef Bacik <jbacik@fusionio.com> | 2013-05-06 19:54:37 (GMT) |
| commit | 7708f029dca5f1b9e9d6ea01ab10cd83e4c74ff2 (patch) | |
| tree | bcaa238c4e7f5ccb19382fb1035aba79a69b6a4f /fs | |
| parent | d4e3991b9945906528c7abb627d759ea43f53bce (diff) | |
| download | linux-7708f029dca5f1b9e9d6ea01ab10cd83e4c74ff2.tar.xz | |
Btrfs: creating the subvolume qgroup automatically when enabling quota
Creating the subvolume/snapshots(including root subvolume) qgroup
auotomatically when enabling quota.
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Reviewed-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/ioctl.c | 2 | ||||
| -rw-r--r-- | fs/btrfs/qgroup.c | 55 |
2 files changed, 57 insertions, 0 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 9c44d65..4fc9751 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -3697,6 +3697,7 @@ static long btrfs_ioctl_quota_ctl(struct file *file, void __user *arg) goto drop_write; } + down_write(&root->fs_info->subvol_sem); if (sa->cmd != BTRFS_QUOTA_CTL_RESCAN) { trans = btrfs_start_transaction(root, 2); if (IS_ERR(trans)) { @@ -3730,6 +3731,7 @@ static long btrfs_ioctl_quota_ctl(struct file *file, void __user *arg) } out: kfree(sa); + up_write(&root->fs_info->subvol_sem); drop_write: mnt_drop_write_file(file); return ret; diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index 33b0bea..5be5a39 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -781,11 +781,15 @@ int btrfs_quota_enable(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info) { struct btrfs_root *quota_root; + struct btrfs_root *tree_root = fs_info->tree_root; struct btrfs_path *path = NULL; struct btrfs_qgroup_status_item *ptr; struct extent_buffer *leaf; struct btrfs_key key; + struct btrfs_key found_key; + struct btrfs_qgroup *qgroup = NULL; int ret = 0; + int slot; spin_lock(&fs_info->qgroup_lock); if (fs_info->quota_root) { @@ -832,7 +836,58 @@ int btrfs_quota_enable(struct btrfs_trans_handle *trans, btrfs_mark_buffer_dirty(leaf); + key.objectid = 0; + key.type = BTRFS_ROOT_REF_KEY; + key.offset = 0; + + btrfs_release_path(path); + ret = btrfs_search_slot_for_read(tree_root, &key, path, 1, 0); + if (ret > 0) + goto out_add_root; + if (ret < 0) + goto out_free_path; + + + while (1) { + slot = path->slots[0]; + leaf = path->nodes[0]; + btrfs_item_key_to_cpu(leaf, &found_key, slot); + + if (found_key.type == BTRFS_ROOT_REF_KEY) { + ret = add_qgroup_item(trans, quota_root, + found_key.offset); + if (ret) + goto out_free_path; + + spin_lock(&fs_info->qgroup_lock); + qgroup = add_qgroup_rb(fs_info, found_key.offset); + if (IS_ERR(qgroup)) { + spin_unlock(&fs_info->qgroup_lock); + ret = PTR_ERR(qgroup); + goto out_free_path; + } + spin_unlock(&fs_info->qgroup_lock); + } + ret = btrfs_next_item(tree_root, path); + if (ret < 0) + goto out_free_path; + if (ret) + break; + } + +out_add_root: + btrfs_release_path(path); + ret = add_qgroup_item(trans, quota_root, BTRFS_FS_TREE_OBJECTID); + if (ret) + goto out_free_path; + spin_lock(&fs_info->qgroup_lock); + qgroup = add_qgroup_rb(fs_info, BTRFS_FS_TREE_OBJECTID); + if (IS_ERR(qgroup)) { + spin_unlock(&fs_info->qgroup_lock); + ret = PTR_ERR(qgroup); + goto out_free_path; + } fs_info->quota_root = quota_root; fs_info->pending_quota_state = 1; spin_unlock(&fs_info->qgroup_lock); |