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quota: Add support for ->get_nextdqblk() for VFS quota
Add infrastructure for supporting get_nextdqblk() callback for VFS quotas. Translate the operation into a callback to appropriate filesystem and consequently to quota format callback. Signed-off-by: Jan Kara <jack@suse.cz>
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484a10f493
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@ -1132,6 +1132,7 @@ static const struct dquot_operations ext4_quota_operations = {
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.alloc_dquot = dquot_alloc,
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.destroy_dquot = dquot_destroy,
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.get_projid = ext4_get_projid,
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.get_next_id = dquot_get_next_id,
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};
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static const struct quotactl_ops ext4_qctl_operations = {
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@ -2031,6 +2031,21 @@ int dquot_commit_info(struct super_block *sb, int type)
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}
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EXPORT_SYMBOL(dquot_commit_info);
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int dquot_get_next_id(struct super_block *sb, struct kqid *qid)
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{
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struct quota_info *dqopt = sb_dqopt(sb);
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int err;
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if (!dqopt->ops[qid->type]->get_next_id)
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return -ENOSYS;
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mutex_lock(&dqopt->dqio_mutex);
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err = dqopt->ops[qid->type]->get_next_id(sb, qid);
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mutex_unlock(&dqopt->dqio_mutex);
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return err;
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}
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EXPORT_SYMBOL(dquot_get_next_id);
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/*
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* Definitions of diskquota operations.
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*/
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@ -2042,6 +2057,7 @@ const struct dquot_operations dquot_operations = {
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.write_info = dquot_commit_info,
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.alloc_dquot = dquot_alloc,
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.destroy_dquot = dquot_destroy,
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.get_next_id = dquot_get_next_id,
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};
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EXPORT_SYMBOL(dquot_operations);
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@ -2565,6 +2581,27 @@ int dquot_get_dqblk(struct super_block *sb, struct kqid qid,
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}
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EXPORT_SYMBOL(dquot_get_dqblk);
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int dquot_get_next_dqblk(struct super_block *sb, struct kqid *qid,
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struct qc_dqblk *di)
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{
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struct dquot *dquot;
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int err;
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if (!sb->dq_op->get_next_id)
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return -ENOSYS;
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err = sb->dq_op->get_next_id(sb, qid);
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if (err < 0)
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return err;
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dquot = dqget(sb, *qid);
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if (IS_ERR(dquot))
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return PTR_ERR(dquot);
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do_get_dqblk(dquot, di);
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dqput(dquot);
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return 0;
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}
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EXPORT_SYMBOL(dquot_get_next_dqblk);
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#define VFS_QC_MASK \
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(QC_SPACE | QC_SPC_SOFT | QC_SPC_HARD | \
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QC_INO_COUNT | QC_INO_SOFT | QC_INO_HARD | \
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@ -2765,6 +2802,7 @@ const struct quotactl_ops dquot_quotactl_ops = {
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.get_state = dquot_get_state,
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.set_info = dquot_set_dqinfo,
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.get_dqblk = dquot_get_dqblk,
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.get_nextdqblk = dquot_get_next_dqblk,
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.set_dqblk = dquot_set_dqblk
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};
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EXPORT_SYMBOL(dquot_quotactl_ops);
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@ -2776,6 +2814,7 @@ const struct quotactl_ops dquot_quotactl_sysfile_ops = {
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.get_state = dquot_get_state,
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.set_info = dquot_set_dqinfo,
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.get_dqblk = dquot_get_dqblk,
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.get_nextdqblk = dquot_get_next_dqblk,
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.set_dqblk = dquot_set_dqblk
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};
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EXPORT_SYMBOL(dquot_quotactl_sysfile_ops);
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@ -802,6 +802,7 @@ static const struct dquot_operations reiserfs_quota_operations = {
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.write_info = reiserfs_write_info,
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.alloc_dquot = dquot_alloc,
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.destroy_dquot = dquot_destroy,
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.get_next_id = dquot_get_next_id,
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};
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static const struct quotactl_ops reiserfs_qctl_operations = {
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@ -306,6 +306,7 @@ struct quota_format_ops {
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int (*read_dqblk)(struct dquot *dquot); /* Read structure for one user */
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int (*commit_dqblk)(struct dquot *dquot); /* Write structure for one user */
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int (*release_dqblk)(struct dquot *dquot); /* Called when last reference to dquot is being dropped */
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int (*get_next_id)(struct super_block *sb, struct kqid *qid); /* Get next ID with existing structure in the quota file */
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};
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/* Operations working with dquots */
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@ -321,6 +322,8 @@ struct dquot_operations {
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* quota code only */
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qsize_t *(*get_reserved_space) (struct inode *);
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int (*get_projid) (struct inode *, kprojid_t *);/* Get project ID */
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/* Get next ID with active quota structure */
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int (*get_next_id) (struct super_block *sb, struct kqid *qid);
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};
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struct path;
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@ -82,6 +82,7 @@ int dquot_commit(struct dquot *dquot);
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int dquot_acquire(struct dquot *dquot);
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int dquot_release(struct dquot *dquot);
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int dquot_commit_info(struct super_block *sb, int type);
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int dquot_get_next_id(struct super_block *sb, struct kqid *qid);
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int dquot_mark_dquot_dirty(struct dquot *dquot);
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int dquot_file_open(struct inode *inode, struct file *file);
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@ -99,6 +100,8 @@ int dquot_get_state(struct super_block *sb, struct qc_state *state);
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int dquot_set_dqinfo(struct super_block *sb, int type, struct qc_info *ii);
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int dquot_get_dqblk(struct super_block *sb, struct kqid id,
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struct qc_dqblk *di);
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int dquot_get_next_dqblk(struct super_block *sb, struct kqid *id,
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struct qc_dqblk *di);
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int dquot_set_dqblk(struct super_block *sb, struct kqid id,
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struct qc_dqblk *di);
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