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bb9b8e86ad
Calculating dquot CRCs when the backing buffer is written back just
doesn't work reliably. There are several places which manipulate
dquots directly in the buffers, and they don't calculate CRCs
appropriately, nor do they always set the buffer up to calculate
CRCs appropriately.
Firstly, if we log a dquot buffer (e.g. during allocation) it gets
logged without valid CRC, and so on recovery we end up with a dquot
that is not valid.
Secondly, if we recover/repair a dquot, we don't have a verifier
attached to the buffer and hence CRCs are not calculated on the way
down to disk.
Thirdly, calculating the CRC after we've changed the contents means
that if we re-read the dquot from the buffer, we cannot verify the
contents of the dquot are valid, as the CRC is invalid.
So, to avoid all the dquot CRC errors that are being detected by the
read verifier, change to using the same model as for inodes. That
is, dquot CRCs are calculated and written to the backing buffer at
the time the dquot is flushed to the backing buffer. If we modify
the dquot directly in the backing buffer, calculate the CRC
immediately after the modification is complete. Hence the dquot in
the on-disk buffer should always have a valid CRC.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit 6fcdc59de2)
396 lines
15 KiB
C
396 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[4]; /* filling for posterity */
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/*
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* These two are only present on filesystems with the CRC bits set.
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*/
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__be32 dd_crc; /* checksum */
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__be64 dd_lsn; /* last modification in log */
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uuid_t dd_uuid; /* location information */
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} xfs_dqblk_t;
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#define XFS_DQUOT_CRC_OFF offsetof(struct xfs_dqblk, dd_crc)
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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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* 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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#define XFS_ALL_QUOTA_ACTIVE \
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(XFS_UQUOTA_ACTIVE | XFS_PQUOTA_ACTIVE | XFS_GQUOTA_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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#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_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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static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
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struct xfs_inode *ip, long nblks, long ninos, uint flags)
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{
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return 0;
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}
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static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
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struct xfs_mount *mp, struct xfs_dquot *udqp,
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struct xfs_dquot *gdqp, long nblks, long nions, uint flags)
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{
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return 0;
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}
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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_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)
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#endif /* CONFIG_XFS_QUOTA */
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|
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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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|
|
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extern int xfs_qm_dqcheck(struct xfs_mount *, xfs_disk_dquot_t *,
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xfs_dqid_t, uint, uint, char *);
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extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
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|
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extern const struct xfs_buf_ops xfs_dquot_buf_ops;
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|
|
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#endif /* __KERNEL__ */
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#endif /* __XFS_QUOTA_H__ */
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