xfs_quotaops.c

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/*
 * Copyright (c) 2008, Christoph Hellwig
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#include "xfs.h"
#include "xfs_sb.h"
#include "xfs_log.h"
#include "xfs_ag.h"
#include "xfs_mount.h"
#include "xfs_quota.h"
#include "xfs_trans.h"
#include "xfs_bmap_btree.h"
#include "xfs_inode.h"
#include "xfs_qm.h"
#include <linux/quota.h>


STATIC int
xfs_quota_type(int type)
{
    switch (type) {
    case USRQUOTA:
        return XFS_DQ_USER;
    case GRPQUOTA:
        return XFS_DQ_GROUP;
    default:
        return XFS_DQ_PROJ;
    }
}

STATIC int
xfs_fs_get_xstate(
    struct super_block  *sb,
    struct fs_quota_stat    *fqs)
{
    struct xfs_mount    *mp = XFS_M(sb);

    if (!XFS_IS_QUOTA_RUNNING(mp))
        return -ENOSYS;
    return -xfs_qm_scall_getqstat(mp, fqs);
}

STATIC int
xfs_fs_set_xstate(
    struct super_block  *sb,
    unsigned int        uflags,
    int         op)
{
    struct xfs_mount    *mp = XFS_M(sb);
    unsigned int        flags = 0;

    if (sb->s_flags & MS_RDONLY)
        return -EROFS;
    if (op != Q_XQUOTARM && !XFS_IS_QUOTA_RUNNING(mp))
        return -ENOSYS;

    if (uflags & FS_QUOTA_UDQ_ACCT)
        flags |= XFS_UQUOTA_ACCT;
    if (uflags & FS_QUOTA_PDQ_ACCT)
        flags |= XFS_PQUOTA_ACCT;
    if (uflags & FS_QUOTA_GDQ_ACCT)
        flags |= XFS_GQUOTA_ACCT;
    if (uflags & FS_QUOTA_UDQ_ENFD)
        flags |= XFS_UQUOTA_ENFD;
    if (uflags & (FS_QUOTA_PDQ_ENFD|FS_QUOTA_GDQ_ENFD))
        flags |= XFS_OQUOTA_ENFD;

    switch (op) {
    case Q_XQUOTAON:
        return -xfs_qm_scall_quotaon(mp, flags);
    case Q_XQUOTAOFF:
        if (!XFS_IS_QUOTA_ON(mp))
            return -EINVAL;
        return -xfs_qm_scall_quotaoff(mp, flags);
    case Q_XQUOTARM:
        if (XFS_IS_QUOTA_ON(mp))
            return -EINVAL;
        return -xfs_qm_scall_trunc_qfiles(mp, flags);
    }

    return -EINVAL;
}

STATIC int
xfs_fs_get_dqblk(
    struct super_block  *sb,
    struct kqid     qid,
    struct fs_disk_quota    *fdq)
{
    struct xfs_mount    *mp = XFS_M(sb);

    if (!XFS_IS_QUOTA_RUNNING(mp))
        return -ENOSYS;
    if (!XFS_IS_QUOTA_ON(mp))
        return -ESRCH;

    return -xfs_qm_scall_getquota(mp, from_kqid(&init_user_ns, qid),
                      xfs_quota_type(qid.type), fdq);
}

STATIC int
xfs_fs_set_dqblk(
    struct super_block  *sb,
    struct kqid     qid,
    struct fs_disk_quota    *fdq)
{
    struct xfs_mount    *mp = XFS_M(sb);

    if (sb->s_flags & MS_RDONLY)
        return -EROFS;
    if (!XFS_IS_QUOTA_RUNNING(mp))
        return -ENOSYS;
    if (!XFS_IS_QUOTA_ON(mp))
        return -ESRCH;

    return -xfs_qm_scall_setqlim(mp, from_kqid(&init_user_ns, qid),
                     xfs_quota_type(qid.type), fdq);
}

const struct quotactl_ops xfs_quotactl_operations = {
    .get_xstate     = xfs_fs_get_xstate,
    .set_xstate     = xfs_fs_set_xstate,
    .get_dqblk      = xfs_fs_get_dqblk,
    .set_dqblk      = xfs_fs_set_dqblk,
};