9aede1d81b
Parts of userspace want to be able to read and modify dquot buffers (e.g. xfs_db) so we need to split out the reading and writing of these buffers so it is easy to shared code with libxfs in userspace. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ben Myers <bpm@sgi.com>
161 lines
6.5 KiB
C
161 lines
6.5 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_DEFS_H__
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#define __XFS_QUOTA_DEFS_H__
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/*
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* Quota definitions shared between user and kernel source trees.
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*/
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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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* 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_FREEING 0x0010 /* dquot is beeing torn down */
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#define XFS_DQ_ALLTYPES (XFS_DQ_USER|XFS_DQ_PROJ|XFS_DQ_GROUP)
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#define XFS_DQ_FLAGS \
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{ XFS_DQ_USER, "USER" }, \
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{ XFS_DQ_PROJ, "PROJ" }, \
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{ XFS_DQ_GROUP, "GROUP" }, \
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{ XFS_DQ_DIRTY, "DIRTY" }, \
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{ XFS_DQ_FREEING, "FREEING" }
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/*
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* We have the possibility of all three quota types being active at once, and
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* hence free space modification requires modification of all three current
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* dquots in a single transaction. For this case we need to have a reservation
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* of at least 3 dquots.
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*
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* However, a chmod operation can change both UID and GID in a single
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* transaction, resulting in requiring {old, new} x {uid, gid} dquots to be
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* modified. Hence for this case we need to reserve space for at least 4 dquots.
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*
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* And in the worst case, there's a rename operation that can be modifying up to
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* 4 inodes with dquots attached to them. In reality, the only inodes that can
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* have their dquots modified are the source and destination directory inodes
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* due to directory name creation and removal. That can require space allocation
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* and/or freeing on both directory inodes, and hence all three dquots on each
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* inode can be modified. And if the directories are world writeable, all the
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* dquots can be unique and so 6 dquots can be modified....
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*
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* And, of course, we also need to take into account the dquot log format item
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* used to describe each dquot.
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*/
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#define XFS_DQUOT_LOGRES(mp) \
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((sizeof(struct xfs_dq_logformat) + sizeof(struct xfs_disk_dquot)) * 6)
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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_GQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_GQUOTA_ENFD)
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#define XFS_IS_PQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_PQUOTA_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 0x1000 /* uquotas are being turned off */
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#define XFS_GQUOTA_ACTIVE 0x2000 /* gquotas are being turned off */
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#define XFS_PQUOTA_ACTIVE 0x4000 /* pquotas are being turned off */
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#define XFS_ALL_QUOTA_ACTIVE \
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(XFS_UQUOTA_ACTIVE | XFS_GQUOTA_ACTIVE | XFS_PQUOTA_ACTIVE)
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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_SBVERSION 0x0000040 /* change superblock version num */
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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 dqalloc.
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*/
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#define XFS_QMOPT_INHERIT 0x1000000
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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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extern int xfs_dqcheck(struct xfs_mount *mp, xfs_disk_dquot_t *ddq,
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xfs_dqid_t id, uint type, uint flags, char *str);
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extern int xfs_calc_dquots_per_chunk(struct xfs_mount *mp, unsigned int nbblks);
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#endif /* __XFS_QUOTA_H__ */
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