380 lines
15 KiB
C
380 lines
15 KiB
C
/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms 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,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_QUOTA_H__
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#define __XFS_QUOTA_H__
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struct xfs_trans;
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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 __uint32_t xfs_dqid_t;
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/*
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* Even though 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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__be16 d_magic; /* dquot magic = XFS_DQUOT_MAGIC */
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__u8 d_version; /* dquot version */
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__u8 d_flags; /* XFS_DQ_USER/PROJ/GROUP */
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__be32 d_id; /* user,project,group id */
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__be64 d_blk_hardlimit;/* absolute limit on disk blks */
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__be64 d_blk_softlimit;/* preferred limit on disk blks */
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__be64 d_ino_hardlimit;/* maximum # allocated inodes */
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__be64 d_ino_softlimit;/* preferred inode limit */
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__be64 d_bcount; /* disk blocks owned by the user */
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__be64 d_icount; /* inodes owned by the user */
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__be32 d_itimer; /* zero if within inode limits if not,
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this is when we refuse service */
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__be32 d_btimer; /* similar to above; for disk blocks */
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__be16 d_iwarns; /* warnings issued wrt num inodes */
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__be16 d_bwarns; /* warnings issued wrt disk blocks */
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__be32 d_pad0; /* 64 bit align */
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__be64 d_rtb_hardlimit;/* absolute limit on realtime blks */
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__be64 d_rtb_softlimit;/* preferred limit on RT disk blks */
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__be64 d_rtbcount; /* realtime blocks owned */
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__be32 d_rtbtimer; /* similar to above; for RT disk blocks */
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__be16 d_rtbwarns; /* warnings issued wrt RT disk blocks */
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__be16 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 */
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#define XFS_DQ_GROUP 0x0004 /* a group quota */
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#define XFS_DQ_DIRTY 0x0008 /* dquot is dirty */
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#define XFS_DQ_WANT 0x0010 /* for lookup/reclaim race */
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#define XFS_DQ_INACTIVE 0x0020 /* dq off mplist & hashlist */
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#define XFS_DQ_ALLTYPES (XFS_DQ_USER|XFS_DQ_PROJ|XFS_DQ_GROUP)
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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/proj id : 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 /* project quota accounting ON */
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#define XFS_OQUOTA_ENFD 0x0010 /* other (grp/prj) quota limits enforced */
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#define XFS_OQUOTA_CHKD 0x0020 /* quotacheck run on other (grp/prj) quotas */
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#define XFS_GQUOTA_ACCT 0x0040 /* group quota accounting ON */
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/*
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* Quota Accounting/Enforcement flags
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*/
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#define XFS_ALL_QUOTA_ACCT \
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(XFS_UQUOTA_ACCT | XFS_GQUOTA_ACCT | XFS_PQUOTA_ACCT)
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#define XFS_ALL_QUOTA_ENFD (XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD)
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#define XFS_ALL_QUOTA_CHKD (XFS_UQUOTA_CHKD | XFS_OQUOTA_CHKD)
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#define XFS_IS_QUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_ALL_QUOTA_ACCT)
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#define XFS_IS_UQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_UQUOTA_ACCT)
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#define XFS_IS_PQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_PQUOTA_ACCT)
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#define XFS_IS_GQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_GQUOTA_ACCT)
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#define XFS_IS_UQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_UQUOTA_ENFD)
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#define XFS_IS_OQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_OQUOTA_ENFD)
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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 0x0100 /* uquotas are being turned off */
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#define XFS_PQUOTA_ACTIVE 0x0200 /* pquotas are being turned off */
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#define XFS_GQUOTA_ACTIVE 0x0400 /* 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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XFS_PQUOTA_ACTIVE))
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#define XFS_IS_OQUOTA_ON(mp) ((mp)->m_qflags & (XFS_GQUOTA_ACTIVE | \
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XFS_PQUOTA_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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#define XFS_IS_PQUOTA_ON(mp) ((mp)->m_qflags & XFS_PQUOTA_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_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_PQUOTA 0x0000008 /* project 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 needed */
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#define XFS_QMOPT_DQREPAIR 0x0001000 /* repair dquot if damaged */
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#define XFS_QMOPT_GQUOTA 0x0002000 /* group dquot requested */
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#define XFS_QMOPT_ENOSPC 0x0004000 /* enospc instead of edquot (prj) */
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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 \
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(XFS_QMOPT_UQUOTA | XFS_QMOPT_PQUOTA | 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 racy, 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_OQUOTA_ON(mp) && \
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(ip)->i_gdquot == NULL))
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#define XFS_QM_NEED_QUOTACHECK(mp) \
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((XFS_IS_UQUOTA_ON(mp) && \
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(mp->m_sb.sb_qflags & XFS_UQUOTA_CHKD) == 0) || \
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(XFS_IS_GQUOTA_ON(mp) && \
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((mp->m_sb.sb_qflags & XFS_OQUOTA_CHKD) == 0 || \
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(mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT))) || \
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(XFS_IS_PQUOTA_ON(mp) && \
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((mp->m_sb.sb_qflags & XFS_OQUOTA_CHKD) == 0 || \
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(mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT))))
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#define XFS_MOUNT_QUOTA_SET1 (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD|\
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XFS_UQUOTA_CHKD|XFS_PQUOTA_ACCT|\
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XFS_OQUOTA_ENFD|XFS_OQUOTA_CHKD)
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#define XFS_MOUNT_QUOTA_SET2 (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD|\
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XFS_UQUOTA_CHKD|XFS_GQUOTA_ACCT|\
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XFS_OQUOTA_ENFD|XFS_OQUOTA_CHKD)
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#define XFS_MOUNT_QUOTA_ALL (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD|\
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XFS_UQUOTA_CHKD|XFS_PQUOTA_ACCT|\
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XFS_OQUOTA_ENFD|XFS_OQUOTA_CHKD|\
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XFS_GQUOTA_ACCT)
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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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#ifdef CONFIG_XFS_QUOTA
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extern void xfs_trans_dup_dqinfo(struct xfs_trans *, struct xfs_trans *);
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extern void xfs_trans_free_dqinfo(struct xfs_trans *);
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extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *,
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uint, long);
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extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
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extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
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extern int xfs_trans_reserve_quota_nblks(struct xfs_trans *,
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struct xfs_inode *, long, long, uint);
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extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
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struct xfs_mount *, struct xfs_dquot *,
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struct xfs_dquot *, long, long, uint);
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extern int xfs_qm_vop_dqalloc(struct xfs_inode *, uid_t, gid_t, prid_t, uint,
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struct xfs_dquot **, struct xfs_dquot **);
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extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *,
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struct xfs_dquot *, struct xfs_dquot *);
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extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
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extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *,
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struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *);
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extern int xfs_qm_vop_chown_reserve(struct xfs_trans *, struct xfs_inode *,
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struct xfs_dquot *, struct xfs_dquot *, uint);
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extern int xfs_qm_dqattach(struct xfs_inode *, uint);
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extern int xfs_qm_dqattach_locked(struct xfs_inode *, uint);
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extern void xfs_qm_dqdetach(struct xfs_inode *);
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extern void xfs_qm_dqrele(struct xfs_dquot *);
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extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *);
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extern int xfs_qm_sync(struct xfs_mount *, int);
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extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *);
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extern void xfs_qm_mount_quotas(struct xfs_mount *);
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extern void xfs_qm_unmount(struct xfs_mount *);
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extern void xfs_qm_unmount_quotas(struct xfs_mount *);
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#else
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static inline int
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xfs_qm_vop_dqalloc(struct xfs_inode *ip, uid_t uid, gid_t gid, prid_t prid,
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uint flags, struct xfs_dquot **udqp, struct xfs_dquot **gdqp)
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{
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*udqp = NULL;
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*gdqp = NULL;
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return 0;
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}
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#define xfs_trans_dup_dqinfo(tp, tp2)
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#define xfs_trans_free_dqinfo(tp)
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#define xfs_trans_mod_dquot_byino(tp, ip, fields, delta)
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#define xfs_trans_apply_dquot_deltas(tp)
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#define xfs_trans_unreserve_and_mod_dquots(tp)
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#define xfs_trans_reserve_quota_nblks(tp, ip, nblks, ninos, flags) (0)
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#define xfs_trans_reserve_quota_bydquots(tp, mp, u, g, nb, ni, fl) (0)
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#define xfs_qm_vop_create_dqattach(tp, ip, u, g)
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#define xfs_qm_vop_rename_dqattach(it) (0)
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#define xfs_qm_vop_chown(tp, ip, old, new) (NULL)
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#define xfs_qm_vop_chown_reserve(tp, ip, u, g, fl) (0)
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#define xfs_qm_dqattach(ip, fl) (0)
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#define xfs_qm_dqattach_locked(ip, fl) (0)
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#define xfs_qm_dqdetach(ip)
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#define xfs_qm_dqrele(d)
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#define xfs_qm_statvfs(ip, s)
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#define xfs_qm_sync(mp, fl) (0)
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#define xfs_qm_newmount(mp, a, b) (0)
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#define xfs_qm_mount_quotas(mp)
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#define xfs_qm_unmount(mp)
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#define xfs_qm_unmount_quotas(mp) (0)
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#endif /* CONFIG_XFS_QUOTA */
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#define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \
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xfs_trans_reserve_quota_nblks(tp, ip, -(nblks), -(ninos), flags)
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#define xfs_trans_reserve_quota(tp, mp, ud, gd, nb, ni, f) \
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xfs_trans_reserve_quota_bydquots(tp, mp, 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 int xfs_mount_reset_sbqflags(struct xfs_mount *);
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#endif /* __KERNEL__ */
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#endif /* __XFS_QUOTA_H__ */
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