1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
356 lines
14 KiB
C
356 lines
14 KiB
C
/*
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* Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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*
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* http://www.sgi.com
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
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*/
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#ifndef __XFS_QUOTA_H__
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#define __XFS_QUOTA_H__
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/*
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* The ondisk form of a dquot structure.
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*/
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#define XFS_DQUOT_MAGIC 0x4451 /* 'DQ' */
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#define XFS_DQUOT_VERSION (u_int8_t)0x01 /* latest version number */
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/*
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* uid_t and gid_t are hard-coded to 32 bits in the inode.
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* Hence, an 'id' in a dquot is 32 bits..
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*/
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typedef __int32_t xfs_dqid_t;
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/*
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* Eventhough users may not have quota limits occupying all 64-bits,
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* they may need 64-bit accounting. Hence, 64-bit quota-counters,
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* and quota-limits. This is a waste in the common case, but hey ...
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*/
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typedef __uint64_t xfs_qcnt_t;
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typedef __uint16_t xfs_qwarncnt_t;
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/*
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* This is the main portion of the on-disk representation of quota
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* information for a user. This is the q_core of the xfs_dquot_t that
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* is kept in kernel memory. We pad this with some more expansion room
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* to construct the on disk structure.
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*/
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typedef struct xfs_disk_dquot {
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/*16*/ u_int16_t d_magic; /* dquot magic = XFS_DQUOT_MAGIC */
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/*8 */ u_int8_t d_version; /* dquot version */
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/*8 */ u_int8_t d_flags; /* XFS_DQ_USER/PROJ/GROUP */
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/*32*/ xfs_dqid_t d_id; /* user,project,group id */
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/*64*/ xfs_qcnt_t d_blk_hardlimit;/* absolute limit on disk blks */
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/*64*/ xfs_qcnt_t d_blk_softlimit;/* preferred limit on disk blks */
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/*64*/ xfs_qcnt_t d_ino_hardlimit;/* maximum # allocated inodes */
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/*64*/ xfs_qcnt_t d_ino_softlimit;/* preferred inode limit */
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/*64*/ xfs_qcnt_t d_bcount; /* disk blocks owned by the user */
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/*64*/ xfs_qcnt_t d_icount; /* inodes owned by the user */
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/*32*/ __int32_t d_itimer; /* zero if within inode limits if not,
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this is when we refuse service */
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/*32*/ __int32_t d_btimer; /* similar to above; for disk blocks */
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/*16*/ xfs_qwarncnt_t d_iwarns; /* warnings issued wrt num inodes */
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/*16*/ xfs_qwarncnt_t d_bwarns; /* warnings issued wrt disk blocks */
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/*32*/ __int32_t d_pad0; /* 64 bit align */
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/*64*/ xfs_qcnt_t d_rtb_hardlimit;/* absolute limit on realtime blks */
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/*64*/ xfs_qcnt_t d_rtb_softlimit;/* preferred limit on RT disk blks */
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/*64*/ xfs_qcnt_t d_rtbcount; /* realtime blocks owned */
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/*32*/ __int32_t d_rtbtimer; /* similar to above; for RT disk blocks */
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/*16*/ xfs_qwarncnt_t d_rtbwarns; /* warnings issued wrt RT disk blocks */
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/*16*/ __uint16_t d_pad;
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} xfs_disk_dquot_t;
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/*
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* This is what goes on disk. This is separated from the xfs_disk_dquot because
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* carrying the unnecessary padding would be a waste of memory.
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*/
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typedef struct xfs_dqblk {
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xfs_disk_dquot_t dd_diskdq; /* portion that lives incore as well */
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char dd_fill[32]; /* filling for posterity */
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} xfs_dqblk_t;
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/*
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* flags for q_flags field in the dquot.
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*/
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#define XFS_DQ_USER 0x0001 /* a user quota */
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/* #define XFS_DQ_PROJ 0x0002 -- project quota (IRIX) */
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#define XFS_DQ_GROUP 0x0004 /* a group quota */
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#define XFS_DQ_FLOCKED 0x0008 /* flush lock taken */
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#define XFS_DQ_DIRTY 0x0010 /* dquot is dirty */
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#define XFS_DQ_WANT 0x0020 /* for lookup/reclaim race */
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#define XFS_DQ_INACTIVE 0x0040 /* dq off mplist & hashlist */
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#define XFS_DQ_MARKER 0x0080 /* sentinel */
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/*
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* In the worst case, when both user and group quotas are on,
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* we can have a max of three dquots changing in a single transaction.
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*/
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#define XFS_DQUOT_LOGRES(mp) (sizeof(xfs_disk_dquot_t) * 3)
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/*
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* These are the structures used to lay out dquots and quotaoff
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* records on the log. Quite similar to those of inodes.
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*/
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/*
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* log format struct for dquots.
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* The first two fields must be the type and size fitting into
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* 32 bits : log_recovery code assumes that.
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*/
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typedef struct xfs_dq_logformat {
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__uint16_t qlf_type; /* dquot log item type */
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__uint16_t qlf_size; /* size of this item */
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xfs_dqid_t qlf_id; /* usr/grp id number : 32 bits */
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__int64_t qlf_blkno; /* blkno of dquot buffer */
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__int32_t qlf_len; /* len of dquot buffer */
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__uint32_t qlf_boffset; /* off of dquot in buffer */
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} xfs_dq_logformat_t;
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/*
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* log format struct for QUOTAOFF records.
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* The first two fields must be the type and size fitting into
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* 32 bits : log_recovery code assumes that.
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* We write two LI_QUOTAOFF logitems per quotaoff, the last one keeps a pointer
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* to the first and ensures that the first logitem is taken out of the AIL
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* only when the last one is securely committed.
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*/
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typedef struct xfs_qoff_logformat {
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unsigned short qf_type; /* quotaoff log item type */
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unsigned short qf_size; /* size of this item */
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unsigned int qf_flags; /* USR and/or GRP */
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char qf_pad[12]; /* padding for future */
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} xfs_qoff_logformat_t;
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/*
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* Disk quotas status in m_qflags, and also sb_qflags. 16 bits.
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*/
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#define XFS_UQUOTA_ACCT 0x0001 /* user quota accounting ON */
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#define XFS_UQUOTA_ENFD 0x0002 /* user quota limits enforced */
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#define XFS_UQUOTA_CHKD 0x0004 /* quotacheck run on usr quotas */
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#define XFS_PQUOTA_ACCT 0x0008 /* (IRIX) project quota accounting ON */
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#define XFS_GQUOTA_ENFD 0x0010 /* group quota limits enforced */
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#define XFS_GQUOTA_CHKD 0x0020 /* quotacheck run on grp quotas */
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#define XFS_GQUOTA_ACCT 0x0040 /* group quota accounting ON */
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/*
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* Incore only flags for quotaoff - these bits get cleared when quota(s)
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* are in the process of getting turned off. These flags are in m_qflags but
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* never in sb_qflags.
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*/
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#define XFS_UQUOTA_ACTIVE 0x0080 /* uquotas are being turned off */
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#define XFS_GQUOTA_ACTIVE 0x0100 /* gquotas are being turned off */
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/*
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* Checking XFS_IS_*QUOTA_ON() while holding any inode lock guarantees
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* quota will be not be switched off as long as that inode lock is held.
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*/
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#define XFS_IS_QUOTA_ON(mp) ((mp)->m_qflags & (XFS_UQUOTA_ACTIVE | \
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XFS_GQUOTA_ACTIVE))
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#define XFS_IS_UQUOTA_ON(mp) ((mp)->m_qflags & XFS_UQUOTA_ACTIVE)
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#define XFS_IS_GQUOTA_ON(mp) ((mp)->m_qflags & XFS_GQUOTA_ACTIVE)
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/*
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* Flags to tell various functions what to do. Not all of these are meaningful
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* to a single function. None of these XFS_QMOPT_* flags are meant to have
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* persistent values (ie. their values can and will change between versions)
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*/
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#define XFS_QMOPT_DQLOCK 0x0000001 /* dqlock */
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#define XFS_QMOPT_DQALLOC 0x0000002 /* alloc dquot ondisk if needed */
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#define XFS_QMOPT_UQUOTA 0x0000004 /* user dquot requested */
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#define XFS_QMOPT_GQUOTA 0x0000008 /* group dquot requested */
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#define XFS_QMOPT_FORCE_RES 0x0000010 /* ignore quota limits */
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#define XFS_QMOPT_DQSUSER 0x0000020 /* don't cache super users dquot */
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#define XFS_QMOPT_SBVERSION 0x0000040 /* change superblock version num */
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#define XFS_QMOPT_QUOTAOFF 0x0000080 /* quotas are being turned off */
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#define XFS_QMOPT_UMOUNTING 0x0000100 /* filesys is being unmounted */
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#define XFS_QMOPT_DOLOG 0x0000200 /* log buf changes (in quotacheck) */
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#define XFS_QMOPT_DOWARN 0x0000400 /* increase warning cnt if necessary */
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#define XFS_QMOPT_ILOCKED 0x0000800 /* inode is already locked (excl) */
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#define XFS_QMOPT_DQREPAIR 0x0001000 /* repair dquot, if damaged. */
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/*
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* flags to xfs_trans_mod_dquot to indicate which field needs to be
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* modified.
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*/
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#define XFS_QMOPT_RES_REGBLKS 0x0010000
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#define XFS_QMOPT_RES_RTBLKS 0x0020000
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#define XFS_QMOPT_BCOUNT 0x0040000
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#define XFS_QMOPT_ICOUNT 0x0080000
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#define XFS_QMOPT_RTBCOUNT 0x0100000
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#define XFS_QMOPT_DELBCOUNT 0x0200000
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#define XFS_QMOPT_DELRTBCOUNT 0x0400000
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#define XFS_QMOPT_RES_INOS 0x0800000
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/*
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* flags for dqflush and dqflush_all.
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*/
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#define XFS_QMOPT_SYNC 0x1000000
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#define XFS_QMOPT_ASYNC 0x2000000
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#define XFS_QMOPT_DELWRI 0x4000000
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/*
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* flags for dqalloc.
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*/
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#define XFS_QMOPT_INHERIT 0x8000000
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/*
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* flags to xfs_trans_mod_dquot.
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*/
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#define XFS_TRANS_DQ_RES_BLKS XFS_QMOPT_RES_REGBLKS
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#define XFS_TRANS_DQ_RES_RTBLKS XFS_QMOPT_RES_RTBLKS
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#define XFS_TRANS_DQ_RES_INOS XFS_QMOPT_RES_INOS
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#define XFS_TRANS_DQ_BCOUNT XFS_QMOPT_BCOUNT
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#define XFS_TRANS_DQ_DELBCOUNT XFS_QMOPT_DELBCOUNT
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#define XFS_TRANS_DQ_ICOUNT XFS_QMOPT_ICOUNT
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#define XFS_TRANS_DQ_RTBCOUNT XFS_QMOPT_RTBCOUNT
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#define XFS_TRANS_DQ_DELRTBCOUNT XFS_QMOPT_DELRTBCOUNT
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#define XFS_QMOPT_QUOTALL (XFS_QMOPT_UQUOTA|XFS_QMOPT_GQUOTA)
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#define XFS_QMOPT_RESBLK_MASK (XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_RES_RTBLKS)
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#ifdef __KERNEL__
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/*
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* This check is done typically without holding the inode lock;
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* that may seem racey, but it is harmless in the context that it is used.
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* The inode cannot go inactive as long a reference is kept, and
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* therefore if dquot(s) were attached, they'll stay consistent.
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* If, for example, the ownership of the inode changes while
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* we didn't have the inode locked, the appropriate dquot(s) will be
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* attached atomically.
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*/
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#define XFS_NOT_DQATTACHED(mp, ip) ((XFS_IS_UQUOTA_ON(mp) &&\
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(ip)->i_udquot == NULL) || \
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(XFS_IS_GQUOTA_ON(mp) && \
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(ip)->i_gdquot == NULL))
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#define XFS_QM_NEED_QUOTACHECK(mp) ((XFS_IS_UQUOTA_ON(mp) && \
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(mp->m_sb.sb_qflags & \
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XFS_UQUOTA_CHKD) == 0) || \
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(XFS_IS_GQUOTA_ON(mp) && \
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(mp->m_sb.sb_qflags & \
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XFS_GQUOTA_CHKD) == 0))
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#define XFS_MOUNT_QUOTA_ALL (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD|\
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XFS_UQUOTA_CHKD|XFS_GQUOTA_ACCT|\
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XFS_GQUOTA_ENFD|XFS_GQUOTA_CHKD)
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#define XFS_MOUNT_QUOTA_MASK (XFS_MOUNT_QUOTA_ALL | XFS_UQUOTA_ACTIVE | \
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XFS_GQUOTA_ACTIVE)
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/*
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* The structure kept inside the xfs_trans_t keep track of dquot changes
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* within a transaction and apply them later.
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*/
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typedef struct xfs_dqtrx {
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struct xfs_dquot *qt_dquot; /* the dquot this refers to */
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ulong qt_blk_res; /* blks reserved on a dquot */
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ulong qt_blk_res_used; /* blks used from the reservation */
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ulong qt_ino_res; /* inode reserved on a dquot */
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ulong qt_ino_res_used; /* inodes used from the reservation */
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long qt_bcount_delta; /* dquot blk count changes */
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long qt_delbcnt_delta; /* delayed dquot blk count changes */
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long qt_icount_delta; /* dquot inode count changes */
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ulong qt_rtblk_res; /* # blks reserved on a dquot */
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ulong qt_rtblk_res_used;/* # blks used from reservation */
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long qt_rtbcount_delta;/* dquot realtime blk changes */
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long qt_delrtb_delta; /* delayed RT blk count changes */
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} xfs_dqtrx_t;
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/*
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* Dquot transaction functions, used if quota is enabled.
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*/
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typedef void (*qo_dup_dqinfo_t)(struct xfs_trans *, struct xfs_trans *);
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typedef void (*qo_mod_dquot_byino_t)(struct xfs_trans *,
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struct xfs_inode *, uint, long);
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typedef void (*qo_free_dqinfo_t)(struct xfs_trans *);
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typedef void (*qo_apply_dquot_deltas_t)(struct xfs_trans *);
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typedef void (*qo_unreserve_and_mod_dquots_t)(struct xfs_trans *);
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typedef int (*qo_reserve_quota_nblks_t)(
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struct xfs_trans *, struct xfs_mount *,
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struct xfs_inode *, long, long, uint);
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typedef int (*qo_reserve_quota_bydquots_t)(
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struct xfs_trans *, struct xfs_mount *,
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struct xfs_dquot *, struct xfs_dquot *,
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long, long, uint);
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typedef struct xfs_dqtrxops {
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qo_dup_dqinfo_t qo_dup_dqinfo;
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qo_free_dqinfo_t qo_free_dqinfo;
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qo_mod_dquot_byino_t qo_mod_dquot_byino;
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qo_apply_dquot_deltas_t qo_apply_dquot_deltas;
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qo_reserve_quota_nblks_t qo_reserve_quota_nblks;
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qo_reserve_quota_bydquots_t qo_reserve_quota_bydquots;
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qo_unreserve_and_mod_dquots_t qo_unreserve_and_mod_dquots;
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} xfs_dqtrxops_t;
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#define XFS_DQTRXOP(mp, tp, op, args...) \
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((mp)->m_qm_ops.xfs_dqtrxops ? \
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((mp)->m_qm_ops.xfs_dqtrxops->op)(tp, ## args) : 0)
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#define XFS_DQTRXOP_VOID(mp, tp, op, args...) \
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((mp)->m_qm_ops.xfs_dqtrxops ? \
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((mp)->m_qm_ops.xfs_dqtrxops->op)(tp, ## args) : (void)0)
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#define XFS_TRANS_DUP_DQINFO(mp, otp, ntp) \
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XFS_DQTRXOP_VOID(mp, otp, qo_dup_dqinfo, ntp)
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#define XFS_TRANS_FREE_DQINFO(mp, tp) \
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XFS_DQTRXOP_VOID(mp, tp, qo_free_dqinfo)
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#define XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, field, delta) \
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XFS_DQTRXOP_VOID(mp, tp, qo_mod_dquot_byino, ip, field, delta)
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#define XFS_TRANS_APPLY_DQUOT_DELTAS(mp, tp) \
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XFS_DQTRXOP_VOID(mp, tp, qo_apply_dquot_deltas)
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#define XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, nblks, ninos, fl) \
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XFS_DQTRXOP(mp, tp, qo_reserve_quota_nblks, mp, ip, nblks, ninos, fl)
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#define XFS_TRANS_RESERVE_QUOTA_BYDQUOTS(mp, tp, ud, gd, nb, ni, fl) \
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XFS_DQTRXOP(mp, tp, qo_reserve_quota_bydquots, mp, ud, gd, nb, ni, fl)
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#define XFS_TRANS_UNRESERVE_AND_MOD_DQUOTS(mp, tp) \
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XFS_DQTRXOP_VOID(mp, tp, qo_unreserve_and_mod_dquots)
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#define XFS_TRANS_RESERVE_BLKQUOTA(mp, tp, ip, nblks) \
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XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, nblks, 0, \
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XFS_QMOPT_RES_REGBLKS)
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#define XFS_TRANS_RESERVE_BLKQUOTA_FORCE(mp, tp, ip, nblks) \
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XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, nblks, 0, \
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XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES)
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#define XFS_TRANS_UNRESERVE_BLKQUOTA(mp, tp, ip, nblks) \
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XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, -(nblks), 0, \
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XFS_QMOPT_RES_REGBLKS)
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#define XFS_TRANS_RESERVE_QUOTA(mp, tp, ud, gd, nb, ni, f) \
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XFS_TRANS_RESERVE_QUOTA_BYDQUOTS(mp, tp, ud, gd, nb, ni, \
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f | XFS_QMOPT_RES_REGBLKS)
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#define XFS_TRANS_UNRESERVE_QUOTA(mp, tp, ud, gd, nb, ni, f) \
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XFS_TRANS_RESERVE_QUOTA_BYDQUOTS(mp, tp, ud, gd, -(nb), -(ni), \
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f | XFS_QMOPT_RES_REGBLKS)
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extern int xfs_qm_dqcheck(xfs_disk_dquot_t *, xfs_dqid_t, uint, uint, char *);
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extern struct bhv_vfsops xfs_qmops;
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#endif /* __KERNEL__ */
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#endif /* __XFS_QUOTA_H__ */
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