LXR linux/fs/xfs/xfs

   1/*
   2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   3 * All Rights Reserved.
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU General Public License as
   7 * published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it would be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write the Free Software Foundation,
  16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17 */
  18#ifndef __XFS_QUOTA_H__
  19#define __XFS_QUOTA_H__
  20
  21#include "xfs_quota_defs.h"
  22
  23/*
  24 * Kernel only quota definitions and functions
  25 */
  26
  27struct xfs_trans;
  28
  29/*
  30 * This check is done typically without holding the inode lock;
  31 * that may seem racy, but it is harmless in the context that it is used.
  32 * The inode cannot go inactive as long a reference is kept, and
  33 * therefore if dquot(s) were attached, they'll stay consistent.
  34 * If, for example, the ownership of the inode changes while
  35 * we didn't have the inode locked, the appropriate dquot(s) will be
  36 * attached atomically.
  37 */
  38#define XFS_NOT_DQATTACHED(mp, ip) \
  39        ((XFS_IS_UQUOTA_ON(mp) && (ip)->i_udquot == NULL) || \
  40         (XFS_IS_GQUOTA_ON(mp) && (ip)->i_gdquot == NULL) || \
  41         (XFS_IS_PQUOTA_ON(mp) && (ip)->i_pdquot == NULL))
  42
  43#define XFS_QM_NEED_QUOTACHECK(mp) \
  44        ((XFS_IS_UQUOTA_ON(mp) && \
  45                (mp->m_sb.sb_qflags & XFS_UQUOTA_CHKD) == 0) || \
  46         (XFS_IS_GQUOTA_ON(mp) && \
  47                (mp->m_sb.sb_qflags & XFS_GQUOTA_CHKD) == 0) || \
  48         (XFS_IS_PQUOTA_ON(mp) && \
  49                (mp->m_sb.sb_qflags & XFS_PQUOTA_CHKD) == 0))
  50
  51/*
  52 * The structure kept inside the xfs_trans_t keep track of dquot changes
  53 * within a transaction and apply them later.
  54 */
  55typedef struct xfs_dqtrx {
  56        struct xfs_dquot *qt_dquot;       /* the dquot this refers to */
  57        ulong           qt_blk_res;       /* blks reserved on a dquot */
  58        ulong           qt_blk_res_used;  /* blks used from the reservation */
  59        ulong           qt_ino_res;       /* inode reserved on a dquot */
  60        ulong           qt_ino_res_used;  /* inodes used from the reservation */
  61        long            qt_bcount_delta;  /* dquot blk count changes */
  62        long            qt_delbcnt_delta; /* delayed dquot blk count changes */
  63        long            qt_icount_delta;  /* dquot inode count changes */
  64        ulong           qt_rtblk_res;     /* # blks reserved on a dquot */
  65        ulong           qt_rtblk_res_used;/* # blks used from reservation */
  66        long            qt_rtbcount_delta;/* dquot realtime blk changes */
  67        long            qt_delrtb_delta;  /* delayed RT blk count changes */
  68} xfs_dqtrx_t;
  69
  70#ifdef CONFIG_XFS_QUOTA
  71extern void xfs_trans_dup_dqinfo(struct xfs_trans *, struct xfs_trans *);
  72extern void xfs_trans_free_dqinfo(struct xfs_trans *);
  73extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *,
  74                uint, long);
  75extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
  76extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
  77extern int xfs_trans_reserve_quota_nblks(struct xfs_trans *,
  78                struct xfs_inode *, long, long, uint);
  79extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
  80                struct xfs_mount *, struct xfs_dquot *,
  81                struct xfs_dquot *, struct xfs_dquot *, long, long, uint);
  82
  83extern int xfs_qm_vop_dqalloc(struct xfs_inode *, xfs_dqid_t, xfs_dqid_t,
  84                prid_t, uint, struct xfs_dquot **, struct xfs_dquot **,
  85                struct xfs_dquot **);
  86extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *,
  87                struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *);
  88extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
  89extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *,
  90                struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *);
  91extern int xfs_qm_vop_chown_reserve(struct xfs_trans *, struct xfs_inode *,
  92                struct xfs_dquot *, struct xfs_dquot *,
  93                struct xfs_dquot *, uint);
  94extern int xfs_qm_dqattach(struct xfs_inode *, uint);
  95extern int xfs_qm_dqattach_locked(struct xfs_inode *, uint);
  96extern void xfs_qm_dqdetach(struct xfs_inode *);
  97extern void xfs_qm_dqrele(struct xfs_dquot *);
  98extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *);
  99extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *);
 100extern void xfs_qm_mount_quotas(struct xfs_mount *);
 101extern void xfs_qm_unmount(struct xfs_mount *);
 102extern void xfs_qm_unmount_quotas(struct xfs_mount *);
 103
 104#else
 105static inline int
 106xfs_qm_vop_dqalloc(struct xfs_inode *ip, xfs_dqid_t uid, xfs_dqid_t gid,
 107                prid_t prid, uint flags, struct xfs_dquot **udqp,
 108                struct xfs_dquot **gdqp, struct xfs_dquot **pdqp)
 109{
 110        *udqp = NULL;
 111        *gdqp = NULL;
 112        *pdqp = NULL;
 113        return 0;
 114}
 115#define xfs_trans_dup_dqinfo(tp, tp2)
 116#define xfs_trans_free_dqinfo(tp)
 117#define xfs_trans_mod_dquot_byino(tp, ip, fields, delta)
 118#define xfs_trans_apply_dquot_deltas(tp)
 119#define xfs_trans_unreserve_and_mod_dquots(tp)
 120static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
 121                struct xfs_inode *ip, long nblks, long ninos, uint flags)
 122{
 123        return 0;
 124}
 125static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
 126                struct xfs_mount *mp, struct xfs_dquot *udqp,
 127                struct xfs_dquot *gdqp, struct xfs_dquot *pdqp,
 128                long nblks, long nions, uint flags)
 129{
 130        return 0;
 131}
 132#define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
 133#define xfs_qm_vop_rename_dqattach(it)                                  (0)
 134#define xfs_qm_vop_chown(tp, ip, old, new)                              (NULL)
 135#define xfs_qm_vop_chown_reserve(tp, ip, u, g, p, fl)                   (0)
 136#define xfs_qm_dqattach(ip, fl)                                         (0)
 137#define xfs_qm_dqattach_locked(ip, fl)                                  (0)
 138#define xfs_qm_dqdetach(ip)
 139#define xfs_qm_dqrele(d)
 140#define xfs_qm_statvfs(ip, s)
 141#define xfs_qm_newmount(mp, a, b)                                       (0)
 142#define xfs_qm_mount_quotas(mp)
 143#define xfs_qm_unmount(mp)
 144#define xfs_qm_unmount_quotas(mp)
 145#endif /* CONFIG_XFS_QUOTA */
 146
 147#define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \
 148        xfs_trans_reserve_quota_nblks(tp, ip, -(nblks), -(ninos), flags)
 149#define xfs_trans_reserve_quota(tp, mp, ud, gd, pd, nb, ni, f) \
 150        xfs_trans_reserve_quota_bydquots(tp, mp, ud, gd, pd, nb, ni, \
 151                                f | XFS_QMOPT_RES_REGBLKS)
 152
 153extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
 154
 155#endif  /* __XFS_QUOTA_H__ */
 156