Btrfs: rescan for qgroups
If qgroup tracking is out of sync, a rescan operation can be started. It iterates the complete extent tree and recalculates all qgroup tracking data. This is an expensive operation and should not be used unless required. A filesystem under rescan can still be umounted. The rescan continues on the next mount. Status information is provided with a separate ioctl while a rescan operation is in progress. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
This commit is contained in:
Jan Schmidt
Josef Bacik
Родитель
46b665ceb1
Коммит
2f2320360b
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@ -1021,9 +1021,9 @@ struct btrfs_block_group_item {
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*/
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#define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
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/*
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* SCANNING is set during the initialization phase
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* RESCAN is set during the initialization phase
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*/
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#define BTRFS_QGROUP_STATUS_FLAG_SCANNING (1ULL << 1)
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#define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
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/*
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* Some qgroup entries are known to be out of date,
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* either because the configuration has changed in a way that
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@ -1052,7 +1052,7 @@ struct btrfs_qgroup_status_item {
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* only used during scanning to record the progress
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* of the scan. It contains a logical address
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*/
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__le64 scan;
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__le64 rescan;
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} __attribute__ ((__packed__));
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struct btrfs_qgroup_info_item {
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@ -1603,6 +1603,11 @@ struct btrfs_fs_info {
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/* used by btrfs_qgroup_record_ref for an efficient tree traversal */
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u64 qgroup_seq;
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/* qgroup rescan items */
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struct mutex qgroup_rescan_lock; /* protects the progress item */
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struct btrfs_key qgroup_rescan_progress;
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struct btrfs_workers qgroup_rescan_workers;
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/* filesystem state */
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unsigned long fs_state;
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@ -2886,8 +2891,8 @@ BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
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version, 64);
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BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
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flags, 64);
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BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
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scan, 64);
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BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
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rescan, 64);
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/* btrfs_qgroup_info_item */
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BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
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@ -3828,7 +3833,7 @@ int btrfs_quota_enable(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info);
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int btrfs_quota_disable(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info);
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int btrfs_quota_rescan(struct btrfs_fs_info *fs_info);
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int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info);
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int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info, u64 src, u64 dst);
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int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
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@ -1976,6 +1976,7 @@ static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info)
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btrfs_stop_workers(&fs_info->caching_workers);
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btrfs_stop_workers(&fs_info->readahead_workers);
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btrfs_stop_workers(&fs_info->flush_workers);
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btrfs_stop_workers(&fs_info->qgroup_rescan_workers);
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}
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/* helper to cleanup tree roots */
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@ -2267,6 +2268,7 @@ int open_ctree(struct super_block *sb,
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fs_info->qgroup_seq = 1;
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fs_info->quota_enabled = 0;
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fs_info->pending_quota_state = 0;
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mutex_init(&fs_info->qgroup_rescan_lock);
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btrfs_init_free_cluster(&fs_info->meta_alloc_cluster);
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btrfs_init_free_cluster(&fs_info->data_alloc_cluster);
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@ -2476,6 +2478,8 @@ int open_ctree(struct super_block *sb,
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btrfs_init_workers(&fs_info->readahead_workers, "readahead",
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fs_info->thread_pool_size,
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&fs_info->generic_worker);
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btrfs_init_workers(&fs_info->qgroup_rescan_workers, "qgroup-rescan", 1,
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&fs_info->generic_worker);
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/*
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* endios are largely parallel and should have a very
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@ -2510,6 +2514,7 @@ int open_ctree(struct super_block *sb,
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ret |= btrfs_start_workers(&fs_info->caching_workers);
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ret |= btrfs_start_workers(&fs_info->readahead_workers);
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ret |= btrfs_start_workers(&fs_info->flush_workers);
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ret |= btrfs_start_workers(&fs_info->qgroup_rescan_workers);
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if (ret) {
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err = -ENOMEM;
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goto fail_sb_buffer;
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@ -3701,12 +3701,10 @@ static long btrfs_ioctl_quota_ctl(struct file *file, void __user *arg)
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}
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down_write(&root->fs_info->subvol_sem);
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if (sa->cmd != BTRFS_QUOTA_CTL_RESCAN) {
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trans = btrfs_start_transaction(root->fs_info->tree_root, 2);
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if (IS_ERR(trans)) {
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ret = PTR_ERR(trans);
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goto out;
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}
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trans = btrfs_start_transaction(root->fs_info->tree_root, 2);
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if (IS_ERR(trans)) {
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ret = PTR_ERR(trans);
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goto out;
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}
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switch (sa->cmd) {
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@ -3716,9 +3714,6 @@ static long btrfs_ioctl_quota_ctl(struct file *file, void __user *arg)
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case BTRFS_QUOTA_CTL_DISABLE:
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ret = btrfs_quota_disable(trans, root->fs_info);
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break;
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case BTRFS_QUOTA_CTL_RESCAN:
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ret = btrfs_quota_rescan(root->fs_info);
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break;
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default:
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ret = -EINVAL;
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break;
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@ -3727,11 +3722,9 @@ static long btrfs_ioctl_quota_ctl(struct file *file, void __user *arg)
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if (copy_to_user(arg, sa, sizeof(*sa)))
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ret = -EFAULT;
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if (trans) {
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err = btrfs_commit_transaction(trans, root->fs_info->tree_root);
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if (err && !ret)
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ret = err;
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}
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err = btrfs_commit_transaction(trans, root->fs_info->tree_root);
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if (err && !ret)
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ret = err;
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out:
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kfree(sa);
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up_write(&root->fs_info->subvol_sem);
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@ -3886,6 +3879,64 @@ drop_write:
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return ret;
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}
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static long btrfs_ioctl_quota_rescan(struct file *file, void __user *arg)
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{
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struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
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struct btrfs_ioctl_quota_rescan_args *qsa;
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int ret;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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ret = mnt_want_write_file(file);
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if (ret)
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return ret;
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qsa = memdup_user(arg, sizeof(*qsa));
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if (IS_ERR(qsa)) {
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ret = PTR_ERR(qsa);
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goto drop_write;
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}
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if (qsa->flags) {
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ret = -EINVAL;
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goto out;
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}
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ret = btrfs_qgroup_rescan(root->fs_info);
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out:
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kfree(qsa);
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drop_write:
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mnt_drop_write_file(file);
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return ret;
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}
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static long btrfs_ioctl_quota_rescan_status(struct file *file, void __user *arg)
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{
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struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
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struct btrfs_ioctl_quota_rescan_args *qsa;
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int ret = 0;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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qsa = kzalloc(sizeof(*qsa), GFP_NOFS);
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if (!qsa)
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return -ENOMEM;
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if (root->fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) {
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qsa->flags = 1;
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qsa->progress = root->fs_info->qgroup_rescan_progress.objectid;
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}
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if (copy_to_user(arg, qsa, sizeof(*qsa)))
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ret = -EFAULT;
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kfree(qsa);
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return ret;
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}
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static long btrfs_ioctl_set_received_subvol(struct file *file,
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void __user *arg)
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{
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@ -4124,6 +4175,10 @@ long btrfs_ioctl(struct file *file, unsigned int
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return btrfs_ioctl_qgroup_create(file, argp);
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case BTRFS_IOC_QGROUP_LIMIT:
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return btrfs_ioctl_qgroup_limit(file, argp);
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case BTRFS_IOC_QUOTA_RESCAN:
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return btrfs_ioctl_quota_rescan(file, argp);
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case BTRFS_IOC_QUOTA_RESCAN_STATUS:
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return btrfs_ioctl_quota_rescan_status(file, argp);
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case BTRFS_IOC_DEV_REPLACE:
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return btrfs_ioctl_dev_replace(root, argp);
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case BTRFS_IOC_GET_FSLABEL:
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@ -31,13 +31,13 @@
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#include "locking.h"
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#include "ulist.h"
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#include "backref.h"
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#include "extent_io.h"
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/* TODO XXX FIXME
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* - subvol delete -> delete when ref goes to 0? delete limits also?
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* - reorganize keys
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* - compressed
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* - sync
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* - rescan
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* - copy also limits on subvol creation
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* - limit
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* - caches fuer ulists
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@ -98,6 +98,14 @@ struct btrfs_qgroup_list {
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struct btrfs_qgroup *member;
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};
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struct qgroup_rescan {
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struct btrfs_work work;
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struct btrfs_fs_info *fs_info;
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};
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static void qgroup_rescan_start(struct btrfs_fs_info *fs_info,
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struct qgroup_rescan *qscan);
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/* must be called with qgroup_ioctl_lock held */
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static struct btrfs_qgroup *find_qgroup_rb(struct btrfs_fs_info *fs_info,
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u64 qgroupid)
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@ -298,7 +306,20 @@ int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info)
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}
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fs_info->qgroup_flags = btrfs_qgroup_status_flags(l,
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ptr);
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/* FIXME read scan element */
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fs_info->qgroup_rescan_progress.objectid =
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btrfs_qgroup_status_rescan(l, ptr);
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if (fs_info->qgroup_flags &
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BTRFS_QGROUP_STATUS_FLAG_RESCAN) {
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struct qgroup_rescan *qscan =
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kmalloc(sizeof(*qscan), GFP_NOFS);
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if (!qscan) {
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ret = -ENOMEM;
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goto out;
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}
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fs_info->qgroup_rescan_progress.type = 0;
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fs_info->qgroup_rescan_progress.offset = 0;
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qgroup_rescan_start(fs_info, qscan);
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}
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goto next1;
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}
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@ -719,7 +740,8 @@ static int update_qgroup_status_item(struct btrfs_trans_handle *trans,
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ptr = btrfs_item_ptr(l, slot, struct btrfs_qgroup_status_item);
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btrfs_set_qgroup_status_flags(l, ptr, fs_info->qgroup_flags);
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btrfs_set_qgroup_status_generation(l, ptr, trans->transid);
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/* XXX scan */
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btrfs_set_qgroup_status_rescan(l, ptr,
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fs_info->qgroup_rescan_progress.objectid);
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btrfs_mark_buffer_dirty(l);
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@ -830,7 +852,7 @@ int btrfs_quota_enable(struct btrfs_trans_handle *trans,
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fs_info->qgroup_flags = BTRFS_QGROUP_STATUS_FLAG_ON |
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BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
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btrfs_set_qgroup_status_flags(leaf, ptr, fs_info->qgroup_flags);
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btrfs_set_qgroup_status_scan(leaf, ptr, 0);
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btrfs_set_qgroup_status_rescan(leaf, ptr, 0);
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btrfs_mark_buffer_dirty(leaf);
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@ -944,10 +966,11 @@ out:
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return ret;
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}
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int btrfs_quota_rescan(struct btrfs_fs_info *fs_info)
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static void qgroup_dirty(struct btrfs_fs_info *fs_info,
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struct btrfs_qgroup *qgroup)
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{
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/* FIXME */
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return 0;
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if (list_empty(&qgroup->dirty))
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list_add(&qgroup->dirty, &fs_info->dirty_qgroups);
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}
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int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
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@ -1155,13 +1178,6 @@ out:
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return ret;
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}
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static void qgroup_dirty(struct btrfs_fs_info *fs_info,
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struct btrfs_qgroup *qgroup)
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{
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if (list_empty(&qgroup->dirty))
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list_add(&qgroup->dirty, &fs_info->dirty_qgroups);
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}
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/*
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* btrfs_qgroup_record_ref is called when the ref is added or deleted. it puts
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* the modification into a list that's later used by btrfs_end_transaction to
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@ -1390,6 +1406,15 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
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BUG();
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}
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mutex_lock(&fs_info->qgroup_rescan_lock);
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if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) {
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if (fs_info->qgroup_rescan_progress.objectid <= node->bytenr) {
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mutex_unlock(&fs_info->qgroup_rescan_lock);
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return 0;
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}
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}
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mutex_unlock(&fs_info->qgroup_rescan_lock);
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/*
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* the delayed ref sequence number we pass depends on the direction of
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* the operation. for add operations, we pass
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@ -1403,7 +1428,15 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
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if (ret < 0)
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return ret;
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mutex_lock(&fs_info->qgroup_rescan_lock);
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spin_lock(&fs_info->qgroup_lock);
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if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) {
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if (fs_info->qgroup_rescan_progress.objectid <= node->bytenr) {
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ret = 0;
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goto unlock;
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}
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}
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quota_root = fs_info->quota_root;
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if (!quota_root)
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goto unlock;
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@ -1445,6 +1478,7 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
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unlock:
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spin_unlock(&fs_info->qgroup_lock);
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mutex_unlock(&fs_info->qgroup_rescan_lock);
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ulist_free(roots);
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ulist_free(tmp);
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@ -1823,3 +1857,259 @@ void assert_qgroups_uptodate(struct btrfs_trans_handle *trans)
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(u32)trans->delayed_ref_elem.seq);
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BUG();
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}
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/*
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* returns < 0 on error, 0 when more leafs are to be scanned.
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* returns 1 when done, 2 when done and FLAG_INCONSISTENT was cleared.
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*/
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static int
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qgroup_rescan_leaf(struct qgroup_rescan *qscan, struct btrfs_path *path,
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struct btrfs_trans_handle *trans, struct ulist *tmp,
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struct extent_buffer *scratch_leaf)
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{
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struct btrfs_key found;
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struct btrfs_fs_info *fs_info = qscan->fs_info;
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struct ulist *roots = NULL;
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struct ulist_node *unode;
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struct ulist_iterator uiter;
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struct seq_list tree_mod_seq_elem = {};
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u64 seq;
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int slot;
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int ret;
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path->leave_spinning = 1;
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mutex_lock(&fs_info->qgroup_rescan_lock);
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ret = btrfs_search_slot_for_read(fs_info->extent_root,
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&fs_info->qgroup_rescan_progress,
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path, 1, 0);
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pr_debug("current progress key (%llu %u %llu), search_slot ret %d\n",
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(unsigned long long)fs_info->qgroup_rescan_progress.objectid,
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fs_info->qgroup_rescan_progress.type,
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(unsigned long long)fs_info->qgroup_rescan_progress.offset,
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ret);
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|
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if (ret) {
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/*
|
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* The rescan is about to end, we will not be scanning any
|
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* further blocks. We cannot unset the RESCAN flag here, because
|
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* we want to commit the transaction if everything went well.
|
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* To make the live accounting work in this phase, we set our
|
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* scan progress pointer such that every real extent objectid
|
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* will be smaller.
|
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*/
|
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fs_info->qgroup_rescan_progress.objectid = (u64)-1;
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btrfs_release_path(path);
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mutex_unlock(&fs_info->qgroup_rescan_lock);
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return ret;
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}
|
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btrfs_item_key_to_cpu(path->nodes[0], &found,
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btrfs_header_nritems(path->nodes[0]) - 1);
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fs_info->qgroup_rescan_progress.objectid = found.objectid + 1;
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btrfs_get_tree_mod_seq(fs_info, &tree_mod_seq_elem);
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memcpy(scratch_leaf, path->nodes[0], sizeof(*scratch_leaf));
|
||||
slot = path->slots[0];
|
||||
btrfs_release_path(path);
|
||||
mutex_unlock(&fs_info->qgroup_rescan_lock);
|
||||
|
||||
for (; slot < btrfs_header_nritems(scratch_leaf); ++slot) {
|
||||
btrfs_item_key_to_cpu(scratch_leaf, &found, slot);
|
||||
if (found.type != BTRFS_EXTENT_ITEM_KEY)
|
||||
continue;
|
||||
ret = btrfs_find_all_roots(trans, fs_info, found.objectid,
|
||||
tree_mod_seq_elem.seq, &roots);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
spin_lock(&fs_info->qgroup_lock);
|
||||
seq = fs_info->qgroup_seq;
|
||||
fs_info->qgroup_seq += roots->nnodes + 1; /* max refcnt */
|
||||
|
||||
ret = qgroup_account_ref_step1(fs_info, roots, tmp, seq);
|
||||
if (ret) {
|
||||
spin_unlock(&fs_info->qgroup_lock);
|
||||
ulist_free(roots);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* step2 of btrfs_qgroup_account_ref works from a single root,
|
||||
* we're doing all at once here.
|
||||
*/
|
||||
ulist_reinit(tmp);
|
||||
ULIST_ITER_INIT(&uiter);
|
||||
while ((unode = ulist_next(roots, &uiter))) {
|
||||
struct btrfs_qgroup *qg;
|
||||
|
||||
qg = find_qgroup_rb(fs_info, unode->val);
|
||||
if (!qg)
|
||||
continue;
|
||||
|
||||
ret = ulist_add(tmp, qg->qgroupid, (uintptr_t)qg,
|
||||
GFP_ATOMIC);
|
||||
if (ret < 0) {
|
||||
spin_unlock(&fs_info->qgroup_lock);
|
||||
ulist_free(roots);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
/* this loop is similar to step 2 of btrfs_qgroup_account_ref */
|
||||
ULIST_ITER_INIT(&uiter);
|
||||
while ((unode = ulist_next(tmp, &uiter))) {
|
||||
struct btrfs_qgroup *qg;
|
||||
struct btrfs_qgroup_list *glist;
|
||||
|
||||
qg = (struct btrfs_qgroup *)(uintptr_t) unode->aux;
|
||||
qg->rfer += found.offset;
|
||||
qg->rfer_cmpr += found.offset;
|
||||
WARN_ON(qg->tag >= seq);
|
||||
if (qg->refcnt - seq == roots->nnodes) {
|
||||
qg->excl += found.offset;
|
||||
qg->excl_cmpr += found.offset;
|
||||
}
|
||||
qgroup_dirty(fs_info, qg);
|
||||
|
||||
list_for_each_entry(glist, &qg->groups, next_group) {
|
||||
ret = ulist_add(tmp, glist->group->qgroupid,
|
||||
(uintptr_t)glist->group,
|
||||
GFP_ATOMIC);
|
||||
if (ret < 0) {
|
||||
spin_unlock(&fs_info->qgroup_lock);
|
||||
ulist_free(roots);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
spin_unlock(&fs_info->qgroup_lock);
|
||||
ulist_free(roots);
|
||||
ret = 0;
|
||||
}
|
||||
|
||||
out:
|
||||
btrfs_put_tree_mod_seq(fs_info, &tree_mod_seq_elem);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void btrfs_qgroup_rescan_worker(struct btrfs_work *work)
|
||||
{
|
||||
struct qgroup_rescan *qscan = container_of(work, struct qgroup_rescan,
|
||||
work);
|
||||
struct btrfs_path *path;
|
||||
struct btrfs_trans_handle *trans = NULL;
|
||||
struct btrfs_fs_info *fs_info = qscan->fs_info;
|
||||
struct ulist *tmp = NULL;
|
||||
struct extent_buffer *scratch_leaf = NULL;
|
||||
int err = -ENOMEM;
|
||||
|
||||
path = btrfs_alloc_path();
|
||||
if (!path)
|
||||
goto out;
|
||||
tmp = ulist_alloc(GFP_NOFS);
|
||||
if (!tmp)
|
||||
goto out;
|
||||
scratch_leaf = kmalloc(sizeof(*scratch_leaf), GFP_NOFS);
|
||||
if (!scratch_leaf)
|
||||
goto out;
|
||||
|
||||
err = 0;
|
||||
while (!err) {
|
||||
trans = btrfs_start_transaction(fs_info->fs_root, 0);
|
||||
if (IS_ERR(trans)) {
|
||||
err = PTR_ERR(trans);
|
||||
break;
|
||||
}
|
||||
if (!fs_info->quota_enabled) {
|
||||
err = -EINTR;
|
||||
} else {
|
||||
err = qgroup_rescan_leaf(qscan, path, trans,
|
||||
tmp, scratch_leaf);
|
||||
}
|
||||
if (err > 0)
|
||||
btrfs_commit_transaction(trans, fs_info->fs_root);
|
||||
else
|
||||
btrfs_end_transaction(trans, fs_info->fs_root);
|
||||
}
|
||||
|
||||
out:
|
||||
kfree(scratch_leaf);
|
||||
ulist_free(tmp);
|
||||
btrfs_free_path(path);
|
||||
kfree(qscan);
|
||||
|
||||
mutex_lock(&fs_info->qgroup_rescan_lock);
|
||||
fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN;
|
||||
|
||||
if (err == 2 &&
|
||||
fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT) {
|
||||
fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
|
||||
} else if (err < 0) {
|
||||
fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
|
||||
}
|
||||
mutex_unlock(&fs_info->qgroup_rescan_lock);
|
||||
|
||||
if (err >= 0) {
|
||||
pr_info("btrfs: qgroup scan completed%s\n",
|
||||
err == 2 ? " (inconsistency flag cleared)" : "");
|
||||
} else {
|
||||
pr_err("btrfs: qgroup scan failed with %d\n", err);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
qgroup_rescan_start(struct btrfs_fs_info *fs_info, struct qgroup_rescan *qscan)
|
||||
{
|
||||
memset(&qscan->work, 0, sizeof(qscan->work));
|
||||
qscan->work.func = btrfs_qgroup_rescan_worker;
|
||||
qscan->fs_info = fs_info;
|
||||
|
||||
pr_info("btrfs: qgroup scan started\n");
|
||||
btrfs_queue_worker(&fs_info->qgroup_rescan_workers, &qscan->work);
|
||||
}
|
||||
|
||||
int
|
||||
btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info)
|
||||
{
|
||||
int ret = 0;
|
||||
struct rb_node *n;
|
||||
struct btrfs_qgroup *qgroup;
|
||||
struct qgroup_rescan *qscan = kmalloc(sizeof(*qscan), GFP_NOFS);
|
||||
|
||||
if (!qscan)
|
||||
return -ENOMEM;
|
||||
|
||||
mutex_lock(&fs_info->qgroup_rescan_lock);
|
||||
spin_lock(&fs_info->qgroup_lock);
|
||||
if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN)
|
||||
ret = -EINPROGRESS;
|
||||
else if (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON))
|
||||
ret = -EINVAL;
|
||||
if (ret) {
|
||||
spin_unlock(&fs_info->qgroup_lock);
|
||||
mutex_unlock(&fs_info->qgroup_rescan_lock);
|
||||
kfree(qscan);
|
||||
return ret;
|
||||
}
|
||||
|
||||
fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_RESCAN;
|
||||
memset(&fs_info->qgroup_rescan_progress, 0,
|
||||
sizeof(fs_info->qgroup_rescan_progress));
|
||||
|
||||
/* clear all current qgroup tracking information */
|
||||
for (n = rb_first(&fs_info->qgroup_tree); n; n = rb_next(n)) {
|
||||
qgroup = rb_entry(n, struct btrfs_qgroup, node);
|
||||
qgroup->rfer = 0;
|
||||
qgroup->rfer_cmpr = 0;
|
||||
qgroup->excl = 0;
|
||||
qgroup->excl_cmpr = 0;
|
||||
}
|
||||
spin_unlock(&fs_info->qgroup_lock);
|
||||
mutex_unlock(&fs_info->qgroup_rescan_lock);
|
||||
|
||||
qgroup_rescan_start(fs_info, qscan);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -376,12 +376,18 @@ struct btrfs_ioctl_get_dev_stats {
|
|||
|
||||
#define BTRFS_QUOTA_CTL_ENABLE 1
|
||||
#define BTRFS_QUOTA_CTL_DISABLE 2
|
||||
#define BTRFS_QUOTA_CTL_RESCAN 3
|
||||
#define BTRFS_QUOTA_CTL_RESCAN__NOTUSED 3
|
||||
struct btrfs_ioctl_quota_ctl_args {
|
||||
__u64 cmd;
|
||||
__u64 status;
|
||||
};
|
||||
|
||||
struct btrfs_ioctl_quota_rescan_args {
|
||||
__u64 flags;
|
||||
__u64 progress;
|
||||
__u64 reserved[6];
|
||||
};
|
||||
|
||||
struct btrfs_ioctl_qgroup_assign_args {
|
||||
__u64 assign;
|
||||
__u64 src;
|
||||
|
|
@ -520,6 +526,10 @@ struct btrfs_ioctl_send_args {
|
|||
struct btrfs_ioctl_qgroup_create_args)
|
||||
#define BTRFS_IOC_QGROUP_LIMIT _IOR(BTRFS_IOCTL_MAGIC, 43, \
|
||||
struct btrfs_ioctl_qgroup_limit_args)
|
||||
#define BTRFS_IOC_QUOTA_RESCAN _IOW(BTRFS_IOCTL_MAGIC, 44, \
|
||||
struct btrfs_ioctl_quota_rescan_args)
|
||||
#define BTRFS_IOC_QUOTA_RESCAN_STATUS _IOR(BTRFS_IOCTL_MAGIC, 45, \
|
||||
struct btrfs_ioctl_quota_rescan_args)
|
||||
#define BTRFS_IOC_GET_FSLABEL _IOR(BTRFS_IOCTL_MAGIC, 49, \
|
||||
char[BTRFS_LABEL_SIZE])
|
||||
#define BTRFS_IOC_SET_FSLABEL _IOW(BTRFS_IOCTL_MAGIC, 50, \
|
||||
|
|
|
|||
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