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Diffstat (limited to 'fs/xfs/xfs_quota.h')
| -rw-r--r-- | fs/xfs/xfs_quota.h | 356 |
1 files changed, 356 insertions, 0 deletions
diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h new file mode 100644 index 000000000000..703ec4efcb41 --- /dev/null +++ b/fs/xfs/xfs_quota.h @@ -0,0 +1,356 @@ +/* + * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2 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. + * + * Further, this software is distributed without any warranty that it is + * free of the rightful claim of any third person regarding infringement + * or the like. Any license provided herein, whether implied or + * otherwise, applies only to this software file. Patent licenses, if + * any, provided herein do not apply to combinations of this program with + * other software, or any other product whatsoever. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write the Free Software Foundation, Inc., 59 + * Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, + * Mountain View, CA 94043, or: + * + * http://www.sgi.com + * + * For further information regarding this notice, see: + * + * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ + */ +#ifndef __XFS_QUOTA_H__ +#define __XFS_QUOTA_H__ + +/* + * The ondisk form of a dquot structure. + */ +#define XFS_DQUOT_MAGIC 0x4451 /* 'DQ' */ +#define XFS_DQUOT_VERSION (u_int8_t)0x01 /* latest version number */ + +/* + * uid_t and gid_t are hard-coded to 32 bits in the inode. + * Hence, an 'id' in a dquot is 32 bits.. + */ +typedef __int32_t xfs_dqid_t; + +/* + * Eventhough users may not have quota limits occupying all 64-bits, + * they may need 64-bit accounting. Hence, 64-bit quota-counters, + * and quota-limits. This is a waste in the common case, but hey ... + */ +typedef __uint64_t xfs_qcnt_t; +typedef __uint16_t xfs_qwarncnt_t; + +/* + * This is the main portion of the on-disk representation of quota + * information for a user. This is the q_core of the xfs_dquot_t that + * is kept in kernel memory. We pad this with some more expansion room + * to construct the on disk structure. + */ +typedef struct xfs_disk_dquot { +/*16*/ u_int16_t d_magic; /* dquot magic = XFS_DQUOT_MAGIC */ +/*8 */ u_int8_t d_version; /* dquot version */ +/*8 */ u_int8_t d_flags; /* XFS_DQ_USER/PROJ/GROUP */ +/*32*/ xfs_dqid_t d_id; /* user,project,group id */ +/*64*/ xfs_qcnt_t d_blk_hardlimit;/* absolute limit on disk blks */ +/*64*/ xfs_qcnt_t d_blk_softlimit;/* preferred limit on disk blks */ +/*64*/ xfs_qcnt_t d_ino_hardlimit;/* maximum # allocated inodes */ +/*64*/ xfs_qcnt_t d_ino_softlimit;/* preferred inode limit */ +/*64*/ xfs_qcnt_t d_bcount; /* disk blocks owned by the user */ +/*64*/ xfs_qcnt_t d_icount; /* inodes owned by the user */ +/*32*/ __int32_t d_itimer; /* zero if within inode limits if not, + this is when we refuse service */ +/*32*/ __int32_t d_btimer; /* similar to above; for disk blocks */ +/*16*/ xfs_qwarncnt_t d_iwarns; /* warnings issued wrt num inodes */ +/*16*/ xfs_qwarncnt_t d_bwarns; /* warnings issued wrt disk blocks */ +/*32*/ __int32_t d_pad0; /* 64 bit align */ +/*64*/ xfs_qcnt_t d_rtb_hardlimit;/* absolute limit on realtime blks */ +/*64*/ xfs_qcnt_t d_rtb_softlimit;/* preferred limit on RT disk blks */ +/*64*/ xfs_qcnt_t d_rtbcount; /* realtime blocks owned */ +/*32*/ __int32_t d_rtbtimer; /* similar to above; for RT disk blocks */ +/*16*/ xfs_qwarncnt_t d_rtbwarns; /* warnings issued wrt RT disk blocks */ +/*16*/ __uint16_t d_pad; +} xfs_disk_dquot_t; + +/* + * This is what goes on disk. This is separated from the xfs_disk_dquot because + * carrying the unnecessary padding would be a waste of memory. + */ +typedef struct xfs_dqblk { + xfs_disk_dquot_t dd_diskdq; /* portion that lives incore as well */ + char dd_fill[32]; /* filling for posterity */ +} xfs_dqblk_t; + +/* + * flags for q_flags field in the dquot. + */ +#define XFS_DQ_USER 0x0001 /* a user quota */ +/* #define XFS_DQ_PROJ 0x0002 -- project quota (IRIX) */ +#define XFS_DQ_GROUP 0x0004 /* a group quota */ +#define XFS_DQ_FLOCKED 0x0008 /* flush lock taken */ +#define XFS_DQ_DIRTY 0x0010 /* dquot is dirty */ +#define XFS_DQ_WANT 0x0020 /* for lookup/reclaim race */ +#define XFS_DQ_INACTIVE 0x0040 /* dq off mplist & hashlist */ +#define XFS_DQ_MARKER 0x0080 /* sentinel */ + +/* + * In the worst case, when both user and group quotas are on, + * we can have a max of three dquots changing in a single transaction. + */ +#define XFS_DQUOT_LOGRES(mp) (sizeof(xfs_disk_dquot_t) * 3) + + +/* + * These are the structures used to lay out dquots and quotaoff + * records on the log. Quite similar to those of inodes. + */ + +/* + * log format struct for dquots. + * The first two fields must be the type and size fitting into + * 32 bits : log_recovery code assumes that. + */ +typedef struct xfs_dq_logformat { + __uint16_t qlf_type; /* dquot log item type */ + __uint16_t qlf_size; /* size of this item */ + xfs_dqid_t qlf_id; /* usr/grp id number : 32 bits */ + __int64_t qlf_blkno; /* blkno of dquot buffer */ + __int32_t qlf_len; /* len of dquot buffer */ + __uint32_t qlf_boffset; /* off of dquot in buffer */ +} xfs_dq_logformat_t; + +/* + * log format struct for QUOTAOFF records. + * The first two fields must be the type and size fitting into + * 32 bits : log_recovery code assumes that. + * We write two LI_QUOTAOFF logitems per quotaoff, the last one keeps a pointer + * to the first and ensures that the first logitem is taken out of the AIL + * only when the last one is securely committed. + */ +typedef struct xfs_qoff_logformat { + unsigned short qf_type; /* quotaoff log item type */ + unsigned short qf_size; /* size of this item */ + unsigned int qf_flags; /* USR and/or GRP */ + char qf_pad[12]; /* padding for future */ +} xfs_qoff_logformat_t; + + +/* + * Disk quotas status in m_qflags, and also sb_qflags. 16 bits. + */ +#define XFS_UQUOTA_ACCT 0x0001 /* user quota accounting ON */ +#define XFS_UQUOTA_ENFD 0x0002 /* user quota limits enforced */ +#define XFS_UQUOTA_CHKD 0x0004 /* quotacheck run on usr quotas */ +#define XFS_PQUOTA_ACCT 0x0008 /* (IRIX) project quota accounting ON */ +#define XFS_GQUOTA_ENFD 0x0010 /* group quota limits enforced */ +#define XFS_GQUOTA_CHKD 0x0020 /* quotacheck run on grp quotas */ +#define XFS_GQUOTA_ACCT 0x0040 /* group quota accounting ON */ + +/* + * Incore only flags for quotaoff - these bits get cleared when quota(s) + * are in the process of getting turned off. These flags are in m_qflags but + * never in sb_qflags. + */ +#define XFS_UQUOTA_ACTIVE 0x0080 /* uquotas are being turned off */ +#define XFS_GQUOTA_ACTIVE 0x0100 /* gquotas are being turned off */ + +/* + * Checking XFS_IS_*QUOTA_ON() while holding any inode lock guarantees + * quota will be not be switched off as long as that inode lock is held. + */ +#define XFS_IS_QUOTA_ON(mp) ((mp)->m_qflags & (XFS_UQUOTA_ACTIVE | \ + XFS_GQUOTA_ACTIVE)) +#define XFS_IS_UQUOTA_ON(mp) ((mp)->m_qflags & XFS_UQUOTA_ACTIVE) +#define XFS_IS_GQUOTA_ON(mp) ((mp)->m_qflags & XFS_GQUOTA_ACTIVE) + +/* + * Flags to tell various functions what to do. Not all of these are meaningful + * to a single function. None of these XFS_QMOPT_* flags are meant to have + * persistent values (ie. their values can and will change between versions) + */ +#define XFS_QMOPT_DQLOCK 0x0000001 /* dqlock */ +#define XFS_QMOPT_DQALLOC 0x0000002 /* alloc dquot ondisk if needed */ +#define XFS_QMOPT_UQUOTA 0x0000004 /* user dquot requested */ +#define XFS_QMOPT_GQUOTA 0x0000008 /* group dquot requested */ +#define XFS_QMOPT_FORCE_RES 0x0000010 /* ignore quota limits */ +#define XFS_QMOPT_DQSUSER 0x0000020 /* don't cache super users dquot */ +#define XFS_QMOPT_SBVERSION 0x0000040 /* change superblock version num */ +#define XFS_QMOPT_QUOTAOFF 0x0000080 /* quotas are being turned off */ +#define XFS_QMOPT_UMOUNTING 0x0000100 /* filesys is being unmounted */ +#define XFS_QMOPT_DOLOG 0x0000200 /* log buf changes (in quotacheck) */ +#define XFS_QMOPT_DOWARN 0x0000400 /* increase warning cnt if necessary */ +#define XFS_QMOPT_ILOCKED 0x0000800 /* inode is already locked (excl) */ +#define XFS_QMOPT_DQREPAIR 0x0001000 /* repair dquot, if damaged. */ + +/* + * flags to xfs_trans_mod_dquot to indicate which field needs to be + * modified. + */ +#define XFS_QMOPT_RES_REGBLKS 0x0010000 +#define XFS_QMOPT_RES_RTBLKS 0x0020000 +#define XFS_QMOPT_BCOUNT 0x0040000 +#define XFS_QMOPT_ICOUNT 0x0080000 +#define XFS_QMOPT_RTBCOUNT 0x0100000 +#define XFS_QMOPT_DELBCOUNT 0x0200000 +#define XFS_QMOPT_DELRTBCOUNT 0x0400000 +#define XFS_QMOPT_RES_INOS 0x0800000 + +/* + * flags for dqflush and dqflush_all. + */ +#define XFS_QMOPT_SYNC 0x1000000 +#define XFS_QMOPT_ASYNC 0x2000000 +#define XFS_QMOPT_DELWRI 0x4000000 + +/* + * flags for dqalloc. + */ +#define XFS_QMOPT_INHERIT 0x8000000 + +/* + * flags to xfs_trans_mod_dquot. + */ +#define XFS_TRANS_DQ_RES_BLKS XFS_QMOPT_RES_REGBLKS +#define XFS_TRANS_DQ_RES_RTBLKS XFS_QMOPT_RES_RTBLKS +#define XFS_TRANS_DQ_RES_INOS XFS_QMOPT_RES_INOS +#define XFS_TRANS_DQ_BCOUNT XFS_QMOPT_BCOUNT +#define XFS_TRANS_DQ_DELBCOUNT XFS_QMOPT_DELBCOUNT +#define XFS_TRANS_DQ_ICOUNT XFS_QMOPT_ICOUNT +#define XFS_TRANS_DQ_RTBCOUNT XFS_QMOPT_RTBCOUNT +#define XFS_TRANS_DQ_DELRTBCOUNT XFS_QMOPT_DELRTBCOUNT + + +#define XFS_QMOPT_QUOTALL (XFS_QMOPT_UQUOTA|XFS_QMOPT_GQUOTA) +#define XFS_QMOPT_RESBLK_MASK (XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_RES_RTBLKS) + +#ifdef __KERNEL__ +/* + * This check is done typically without holding the inode lock; + * that may seem racey, but it is harmless in the context that it is used. + * The inode cannot go inactive as long a reference is kept, and + * therefore if dquot(s) were attached, they'll stay consistent. + * If, for example, the ownership of the inode changes while + * we didn't have the inode locked, the appropriate dquot(s) will be + * attached atomically. + */ +#define XFS_NOT_DQATTACHED(mp, ip) ((XFS_IS_UQUOTA_ON(mp) &&\ + (ip)->i_udquot == NULL) || \ + (XFS_IS_GQUOTA_ON(mp) && \ + (ip)->i_gdquot == NULL)) + +#define XFS_QM_NEED_QUOTACHECK(mp) ((XFS_IS_UQUOTA_ON(mp) && \ + (mp->m_sb.sb_qflags & \ + XFS_UQUOTA_CHKD) == 0) || \ + (XFS_IS_GQUOTA_ON(mp) && \ + (mp->m_sb.sb_qflags & \ + XFS_GQUOTA_CHKD) == 0)) + +#define XFS_MOUNT_QUOTA_ALL (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD|\ + XFS_UQUOTA_CHKD|XFS_GQUOTA_ACCT|\ + XFS_GQUOTA_ENFD|XFS_GQUOTA_CHKD) +#define XFS_MOUNT_QUOTA_MASK (XFS_MOUNT_QUOTA_ALL | XFS_UQUOTA_ACTIVE | \ + XFS_GQUOTA_ACTIVE) + + +/* + * The structure kept inside the xfs_trans_t keep track of dquot changes + * within a transaction and apply them later. + */ +typedef struct xfs_dqtrx { + struct xfs_dquot *qt_dquot; /* the dquot this refers to */ + ulong qt_blk_res; /* blks reserved on a dquot */ + ulong qt_blk_res_used; /* blks used from the reservation */ + ulong qt_ino_res; /* inode reserved on a dquot */ + ulong qt_ino_res_used; /* inodes used from the reservation */ + long qt_bcount_delta; /* dquot blk count changes */ + long qt_delbcnt_delta; /* delayed dquot blk count changes */ + long qt_icount_delta; /* dquot inode count changes */ + ulong qt_rtblk_res; /* # blks reserved on a dquot */ + ulong qt_rtblk_res_used;/* # blks used from reservation */ + long qt_rtbcount_delta;/* dquot realtime blk changes */ + long qt_delrtb_delta; /* delayed RT blk count changes */ +} xfs_dqtrx_t; + +/* + * Dquot transaction functions, used if quota is enabled. + */ +typedef void (*qo_dup_dqinfo_t)(struct xfs_trans *, struct xfs_trans *); +typedef void (*qo_mod_dquot_byino_t)(struct xfs_trans *, + struct xfs_inode *, uint, long); +typedef void (*qo_free_dqinfo_t)(struct xfs_trans *); +typedef void (*qo_apply_dquot_deltas_t)(struct xfs_trans *); +typedef void (*qo_unreserve_and_mod_dquots_t)(struct xfs_trans *); +typedef int (*qo_reserve_quota_nblks_t)( + struct xfs_trans *, struct xfs_mount *, + struct xfs_inode *, long, long, uint); +typedef int (*qo_reserve_quota_bydquots_t)( + struct xfs_trans *, struct xfs_mount *, + struct xfs_dquot *, struct xfs_dquot *, + long, long, uint); +typedef struct xfs_dqtrxops { + qo_dup_dqinfo_t qo_dup_dqinfo; + qo_free_dqinfo_t qo_free_dqinfo; + qo_mod_dquot_byino_t qo_mod_dquot_byino; + qo_apply_dquot_deltas_t qo_apply_dquot_deltas; + qo_reserve_quota_nblks_t qo_reserve_quota_nblks; + qo_reserve_quota_bydquots_t qo_reserve_quota_bydquots; + qo_unreserve_and_mod_dquots_t qo_unreserve_and_mod_dquots; +} xfs_dqtrxops_t; + +#define XFS_DQTRXOP(mp, tp, op, args...) \ + ((mp)->m_qm_ops.xfs_dqtrxops ? \ + ((mp)->m_qm_ops.xfs_dqtrxops->op)(tp, ## args) : 0) + +#define XFS_DQTRXOP_VOID(mp, tp, op, args...) \ + ((mp)->m_qm_ops.xfs_dqtrxops ? \ + ((mp)->m_qm_ops.xfs_dqtrxops->op)(tp, ## args) : (void)0) + +#define XFS_TRANS_DUP_DQINFO(mp, otp, ntp) \ + XFS_DQTRXOP_VOID(mp, otp, qo_dup_dqinfo, ntp) +#define XFS_TRANS_FREE_DQINFO(mp, tp) \ + XFS_DQTRXOP_VOID(mp, tp, qo_free_dqinfo) +#define XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, field, delta) \ + XFS_DQTRXOP_VOID(mp, tp, qo_mod_dquot_byino, ip, field, delta) +#define XFS_TRANS_APPLY_DQUOT_DELTAS(mp, tp) \ + XFS_DQTRXOP_VOID(mp, tp, qo_apply_dquot_deltas) +#define XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, nblks, ninos, fl) \ + XFS_DQTRXOP(mp, tp, qo_reserve_quota_nblks, mp, ip, nblks, ninos, fl) +#define XFS_TRANS_RESERVE_QUOTA_BYDQUOTS(mp, tp, ud, gd, nb, ni, fl) \ + XFS_DQTRXOP(mp, tp, qo_reserve_quota_bydquots, mp, ud, gd, nb, ni, fl) +#define XFS_TRANS_UNRESERVE_AND_MOD_DQUOTS(mp, tp) \ + XFS_DQTRXOP_VOID(mp, tp, qo_unreserve_and_mod_dquots) + +#define XFS_TRANS_RESERVE_BLKQUOTA(mp, tp, ip, nblks) \ + XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, nblks, 0, \ + XFS_QMOPT_RES_REGBLKS) +#define XFS_TRANS_RESERVE_BLKQUOTA_FORCE(mp, tp, ip, nblks) \ + XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, nblks, 0, \ + XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES) +#define XFS_TRANS_UNRESERVE_BLKQUOTA(mp, tp, ip, nblks) \ + XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, -(nblks), 0, \ + XFS_QMOPT_RES_REGBLKS) +#define XFS_TRANS_RESERVE_QUOTA(mp, tp, ud, gd, nb, ni, f) \ + XFS_TRANS_RESERVE_QUOTA_BYDQUOTS(mp, tp, ud, gd, nb, ni, \ + f | XFS_QMOPT_RES_REGBLKS) +#define XFS_TRANS_UNRESERVE_QUOTA(mp, tp, ud, gd, nb, ni, f) \ + XFS_TRANS_RESERVE_QUOTA_BYDQUOTS(mp, tp, ud, gd, -(nb), -(ni), \ + f | XFS_QMOPT_RES_REGBLKS) + +extern int xfs_qm_dqcheck(xfs_disk_dquot_t *, xfs_dqid_t, uint, uint, char *); + +extern struct bhv_vfsops xfs_qmops; + +#endif /* __KERNEL__ */ + +#endif /* __XFS_QUOTA_H__ */ |